US20220104610A1 - Magnetically driven electric toothbrush head - Google Patents
Magnetically driven electric toothbrush head Download PDFInfo
- Publication number
- US20220104610A1 US20220104610A1 US17/552,368 US202117552368A US2022104610A1 US 20220104610 A1 US20220104610 A1 US 20220104610A1 US 202117552368 A US202117552368 A US 202117552368A US 2022104610 A1 US2022104610 A1 US 2022104610A1
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- United States
- Prior art keywords
- twisting
- groove
- driving shaft
- wall
- brush body
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B15/00—Other brushes; Brushes with additional arrangements
- A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
- A46B15/0016—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means
- A46B15/0026—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means with a magnetic means
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B13/00—Brushes with driven brush bodies or carriers
- A46B13/02—Brushes with driven brush bodies or carriers power-driven carriers
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B5/00—Brush bodies; Handles integral with brushware
- A46B5/0095—Removable or interchangeable brush heads
-
- 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
- A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
- A61C17/3418—Rotation around the axis of the toothbrush handle
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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
- A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
- A61C17/3481—Vibrating brush body, e.g. by using eccentric weights
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B2200/00—Brushes characterized by their functions, uses or applications
- A46B2200/10—For human or animal care
- A46B2200/1066—Toothbrush for cleaning the teeth or dentures
Definitions
- the present disclosure relates to the technical field of electric toothbrush heads, in particular to a magnetically driven electric toothbrush head.
- a typical electric toothbrush includes a brush head that produces high-frequency vibration through rapid rotation or vibration of a vibration unit, such that the toothpaste is instantly decomposed into tiny bubbles which penetrate into and thus clean crevices between teeth.
- the vibration of bristles of the brush can promote the blood circulation of the mouth and has a massage effect on the gingival tissue.
- the electric toothbrush includes the brush handle and the electric toothbrush head.
- the brush handle to drive the electric toothbrush head to vibrate.
- the first is driven by vibration, concretely, the top of the brush handle is provided with a vibration unit.
- the vibration unit is directly inserted into the electric toothbrush head, and then the vibration of the vibration unit drives the electric toothbrush head to vibrate.
- the second is driven by magnetism, that is to say, an electromagnet is set in the brush handle, and a permanent magnet is set on the brush head of the electric tooth. Through the magnetic drive between the electromagnet and the permanent magnet, the brush handle is driven to rotate reciprocatingly.
- the present invention provides a magnetically driven electric toothbrush head which comprises a brush body, a movable board arranged movably, and a screw cap.
- the screw cap has a cavity inside; a top of the screw cap has a top opening in communication with the cavity; an upper end of the brush body is provided with brush hair; the brush body is arranged above the screw cap, and an elastic cover is arranged between a lower end of the brush body and an upper end of the screw cap.
- a fixed frame is fixed inside the cavity of the screw cap
- the movable board is movable reciprocating laterally after magnetic drive
- two twisting plates are arranged in intervals between the fixed frame and the movable board, an upper end of the twisting plate is fixedly connected with the fixed frame and a lower end of the twisting plate is fixedly connected with the movable board, and a resistance of the twisting plate to distortion is less than the resistance to bending.
- the movable board is connected with a driving shaft, a lower end of the driving shaft is fixedly connected with the movable board, an upper end of the driving shaft extends upward through the fixed frame and the elastic cover and fixedly connected with a lower end of the brush body, the driving shaft is spaced from the fixed frame and the elastic cover respectively.
- a bottom of the movable board is provided with two permanent magnets, a lower end of the screw cap is fixed and connected to an upper end of a brush handle, when an electromagnet in the tooth handle is electrified, under a magnetic effect between the electromagnet and the two permanent magnets and a distortion limit of the twisting plates, the movable board drives the driving shaft and the brush body to rotate synchronously and reciprocatingly.
- an upper outer of the twisting plate is provided with a rubber sleeve to form a limiting section
- a top of the rubber sleeve is fixedly connected with a bottom of the fixed frame
- a lower part of the twisting plate is exposed to form a twisting section
- a twisting amplitude of the twisting section is greater than that of the limiting section
- a middle part of the twisting section is connected to the driving shaft with a rubber strip
- one end of the rubber strip is fixedly connected to the driving shaft, and the other end of the rubber strip is wrapped in a middle part of the twisting section, and the rubber strip is movably connected to the twisting section.
- the movable board is provided, on its top, with an elastic plate with horizontal distortion due to compression, the elastic plate is movably arranged on the movable board, a lower end of the twisting section extends through the elastic plate and is fixedly connected with the elastic plate, a sector-shaped guide groove with an arc outer wall is defined in the elastic plate, the driving shaft movably moves through the arc-shape guide groove, and a radian of the arc-shaped outer wall of the sector-shaped guide groove is same as that of the reciprocating rotation of the driving shaft.
- an inner side of the sector-shaped guide groove has a short inner wall
- an outer side of the sector-shaped guide groove has a long outer wall
- a limit groove is defined in a middle of the short inner wall
- the driving shaft is flat
- an inner side of the driving shaft is embedded in the limit groove and is connected with an inner side of the limit groove
- an outer side of the driving shaft is oriented towards the long outer wall
- a gap is formed between the driving shaft and the long outer wall.
- a bottom end of the brush body has a ring bottom portion oriented downward
- the elastic cover has a ring top portion abutting against the ring bottom portion of the brush body
- an upper ring groove is defined in the ring bottom portion and is upward depressed
- a lower ring groove is defined in the ring top portion and is downward depressed
- the upper ring groove is aligned with the lower ring groove.
- the upper ring groove is provided with a rolling ball that is capable of rolling circumferentially along the upper ring groove, and a lower side of the rolling ball is movably placed in the lower ring groove.
- a bottom end of the elastic cover has an annular step oriented downward, the annular step is connected to a top of the screw cap and is arranged around a top opening of the cavity, a connection part extends downward from the bottom end of the elastic cover, and the connection part extends through the top opening of the cavity, surrounds the periphery of the fixed frame, and is fixedly connected with the fixed frame.
- the driving shaft has a flat inserting section that extends upward through the elastic cover, a connecting channel is defined in the brush body for insertion of the flat inserting section, the connecting channel is arranged longitudinally and extends through a bottom of the brush body to form an insertion opening at the bottom of the brush body, a through groove transversely extends through the brush body, the through groove is filled with elastic rubber block which is in a compressed state.
- a pressing wall is formed between the through channel and the connecting channel, the pressing wall has an internal pressing surface facing the connecting channel and an external pressing surface facing the through channel, a central part of the internal pressing surface is convexed towards the connecting channel to form a pressing bulge, the brush body has a limiting wall opposite to the pressing wall, and the pressing wall and the limiting wall are arranged on opposite sides of the through channel respectively.
- an inner side wall of the connecting channel has a straight pressing surface which is arranged facing to the internal pressing surface, the straight pressing surface extends along the axial direction of the connecting channel, the inserting section has two opposite insertion sides, and when the inserting section is inserted into the connecting channel via the insertion opening, one of the insertion sides of the inserting section contacts and abuts against the straight pressing surface, and the other of the insertion sides of the inserting section abuts against the pressing bulge.
- a thickness of the limiting wall is greater than that of the pressing wall.
- the through groove forms a groove opening on the outer wall of the brush body
- the elastic rubber block has an end layer that seals the groove opening, the end layer is hardened, and an outer edge of the end layer is fixedly connected with the outer wall of the brush body.
- the pressing wall is curved, a middle part of the external pressing surface of the pressing wall is depressed toward the connecting channel to form a concaved groove corresponding to the pressing bulge, and the elastic rubber block fills the concaved groove.
- the external pressing surface has an end section in upper and lower parts of the concaved groove, the end section extends to the concaved groove and connects with the sidewall of the concaved groove, and along the extension direction of the end section to the concaved groove, the end section being inclined to the connecting channel.
- FIG. 1 is a perspective view of a magnetically driven electric toothbrush head according to one embodiment of the present disclosure.
- FIG. 2 is a partial perspective view of the magnetically driven electric toothbrush head according to one embodiment of the present disclosure.
- FIG. 3 illustrates a brush handle according to one embodiment of the present disclosure.
- FIG. 4 illustrates a twisting plate according to one embodiment of the present disclosure.
- FIG. 5 illustrates cooperation of a twisting plate, a rubber strip and a driving shaft according to one embodiment of the present disclosure.
- FIG. 6 illustrates connection of twisting plates, an elastic plate and a driving shaft according to one embodiment of the present disclosure.
- FIG. 7 illustrates a sector-shaped guide groove according to one embodiment of the present disclosure.
- FIG. 8 illustrates cooperation of an upper ring groove, a lower ring groove and a rolling ball according to one embodiment of the present disclosure.
- FIG. 9 is an internal view of a brush body according to one embodiment of the present disclosure.
- FIGS. 1-9 a preferred embodiment of the present disclosure is described below.
- a magnetically driven electric toothbrush head includes a brush body 100 , a movable board 400 arranged movably, and a screw cap 300 .
- the screw cap 300 has a cavity 301 inside.
- a top of the screw cap 300 has a top opening in communication with the cavity 301 .
- the cavity 301 extends through a top and a bottom of the screw cap 300 such that the screw cap 300 forms a hollow structure.
- An upper end of the brush body 100 is provided with brush hair 101 .
- the brush hair 101 is used to clean the teeth of the user.
- the brush body 100 is set above the screw cap 300 , and an elastic cover 200 is set between the lower end of the brush body 100 and the upper end of the screw cap 300 . In this way, the brush body 100 and the screw cap 300 can move relatively.
- a fixed frame 203 is fixedly arranged in the cavity 301 of the screw cap 300 while the movable board 400 can move relative to the screw cap 300 .
- the movable board 400 When driven by a magnetic force, the movable board 400 will move reciprocatingly and laterally.
- two twisting plates 600 are arranged in intervals.
- the upper ends of the twisting plate 600 are fixedly connected with the fixed frame 203
- the lower ends of the twisting plate 600 are fixedly connected with the movable board 400 .
- the resistance of the twisting plate 600 to distortion is less than the resistance to bending. In this way, when the movable board 400 is driven by magnetic force and swings back and forth, the twisting plates 600 will twist back and forth without bending.
- the movable board 400 is connected with a driving shaft 500 .
- the lower end of the driving shaft 500 is fixedly connected with the movable board 400 .
- the upper end of the driving shaft 500 extends upward through the fixed frame 203 and the elastic cover 200 , and fixedly connected with the lower end of the brush body 100 .
- the driving shaft 500 and the fixed frame 203 are arranged at regular intervals, and the driving shaft 500 and the elastic cover 200 are arranged at regular intervals, too. In other words, there is no connection between the driving shaft 500 and the fixed frame 203 and no connection between the driving shaft 500 and the elastic cover 200 . Therefore, the fixed frame 203 and the elastic cover 200 will not impose any restriction on the driving shaft 500 .
- the bottom of the movable board 400 is provided with two permanent magnets 401 .
- the lower end of the screw cap 300 is fixed and connected to the upper end of the brush handle 800 , and inside of the brush handle 800 is equipped with an electromagnet 801 and a battery 802 .
- the electromagnet 801 is electrified, under a magnetic effect between the electromagnet 801 and the two permanent magnets 401 and a distortion limit of the twisting plate 600 , the movable board 400 drives the driving shaft 500 and the toothbrush body 100 to rotate synchronously and reciprocatingly.
- the magnetic effect between the electromagnet 801 and the permanent magnet 401 can drive the movable board 400 to move reciprocatingly and laterally.
- the twisting plates 600 will be distorted during the movement of the movable board 400 .
- the movable board 400 obtains a reciprocating rotation movement, which results in the driving shaft 500 fixedly connected to the movable board 400 rotating reciprocatingly, and consequently the brush body 100 rotating reciprocatingly .
- the toothbrush hair 101 on the brush body 100 also rotates reciprocatingly to clean the teeth.
- the outer surface of the upper part of the twisting plate 600 is provided with a rubber sleeve 601 to form a limiting section, and the top of the rubber sleeve 601 is fixedly connected with the bottom of the fixed frame 203 . In this way, the upper part of the twisting plate 600 is restricted by the rubber sleeve 601 not to be twisted.
- the lower part of the twisting plate 600 is exposed to form a twisting section 602 . When the twisting plate 600 is twisted, the twisting amplitude of the twisting section 602 is greater than that of the limiting section.
- twisting plate 600 when the twisting plate 600 is driven to twist, its twisting motion is basically limited to the twisting section 602 , which can increase the twisting amplitude of the twisting section 602 and consequently allows the twisting section 602 to drive the driving shaft 500 to rotate with an increased amplitude.
- the twisting motion is basically limited to the twisting section 602 , which can reduce the overall deformation of the twisting plate 600 , greatly extend the service life of the twisting plate, and avoid the premature twisting failure of the twisting plate 600 which results in the failure of the electric toothbrush head to achieve the effect of cleaning the teeth.
- the middle part of the twisting section 602 is connected to the driving shaft 500 with a rubber strip 603 , and the rubber strip 603 is telescopic.
- One end of the rubber strip 603 is fixedly connected to the driving shaft 500 , and the other end of the rubber strip 603 is wrapped on the middle part of the twisting section 602 .
- the rubber strip 603 is movably connected to the twisting section 602 .
- the rubber strips 603 pull the driving shaft 500 synchronously and drive the movable board 400 for reciprocating rotation synchronously and reversely.
- the elastic force generated by the deformation of the rubber strip 603 can drive the movable board 400 and the driving shaft 500 to do reciprocating rotation synchronously and reversely, which achieves the effect of double-driving.
- the reciprocating rotation of the driving shaft 500 can be strengthen, and the reciprocating rotation path of the driving shaft 500 can be guided and the rotation trajectory is limited to thereby enhance the orderliness of the reciprocating rotation of the driving shaft 500 .
- the movable board 400 drives the driving shaft 500 to rotate reciprocatingly.
- the twisting movement of the twisting plate 600 can be basically limited to the twisting section 602 , and the middle part of the twisting section 602 is connected with the driving shaft 500 via the rubber strips 603 .
- the distortion of the twist section 602 results in deformation of the rubber strip 603 , and the deformation of the rubber strip 603 drives the movable board 400 to rotate reciprocatingly, thereby strengthening the reciprocating rotation of the driving shaft 500 , improving the performance of the magnetically driven electric toothbrush head, and increasing the service life of the magnetically driven electric toothbrush head.
- the top of the movable board 400 is provided with an elastic plate 700 with horizontal distortion due to be compressed, and the elastic plate 700 is arranged on the movable board 400 .
- the lower end of the twisting section 602 extends through the elastic plate 700 and is fixedly connected with the elastic plate 700 .
- a sector-shaped guide groove 701 is defined in the elastic plate 700 .
- the driving shaft 500 movably passes through the guide groove 701 .
- the sector-shaped guide groove 701 has an arc-shaped outer wall 703 and the radian of the outer wall 703 is same as that of the reciprocating rotation of the driving shaft 500 .
- the distortion of the lower end of the twisting section 602 can be restricted/limited/reduced by setting the elastic plate 700 on the movable board 400 , so that the distortion of the twisting section 602 is substantially concentrated in the middle part of the twisting section 602 , and the distortion of the middle of the twisting section 602 is enhanced.
- the arc-shape guide groove 701 can restrict and guide the reciprocating rotation trajectory of the driving shaft 500 , so as to enhance the orderliness of the reciprocating rotation of the driving shaft 500 .
- the inner side of the guide groove 701 has a short inner wall, and the outer side of the sector-shaped guide groove 701 has a long arc-shaped outer wall 703 .
- a limit groove 702 is defined in the middle of the short inner wall, and the driving shaft 500 is flat.
- the inner side of the driving shaft 500 is embedded in the limit groove 702 , and abuts against the inner side of the limit groove 702 .
- the outer side of the driving shaft 500 is oriented towards the long outer wall 703 , and a gap is formed between the outer side of the driving shaft 500 and the long outer wall 703 .
- the driving shaft 500 When the driving shaft 500 rotates in reciprocating motion, the driving shaft 500 is rotating with its inner side as the rotation center, and its outer side as the rotation arm. In this way, by setting the limit groove 702 , the inner side of the driving shaft 500 is embedded in the limit groove 702 , which can limit and guide the reciprocating motion of the driving shaft 500 , and further ensure the orderliness of the reciprocating motion of the driving shaft 500 .
- the brush body 100 has a ring bottom portion 104 , which is oriented downward.
- the elastic cover 200 has a ring top portion 205 , which is oriented upward.
- the ring bottom portion 104 is connected to the ring top portion 205 .
- An upper ring groove 102 is set in the ring bottom portion 104 and is sunken upward from the ring bottom portion, and a lower ring groove 204 is defined in the ring top portion 205 and is sunken downward.
- the upper ring groove 102 is aligned with the lower ring groove 204 .
- the upper ring groove 102 is provided with a rolling ball 103 that rolls circumferentially along the upper ring groove 102 , the upper side of the rolling ball 103 is movably received in the upper ring groove 102 .
- the lower part of the ball 103 extends downward beyond the upper ring groove 102 , and the lower side of the ball 103 is movably received in the lower ring groove 204 . In this way, during the reciprocating rotation of the driving shaft 500 , a full surface matching between the bottom of the brush body 100 and the upper end of the elastic cover 200 is avoided.
- the rolling ball 103 is used to rotate in the upper ring groove 102 and the lower ring groove 204 , which can enhance the smoothness and orderliness of the brush body 100 in the rotation process, and avoid the deformation of elastic cover 200 due to excessive friction during reciprocating rotation of brush bodyl 00 .
- the bottom end of the elastic cover 200 has an annular step 201 oriented downward, and the annular step 201 abuts and contacts the top end of the screw cap 300 , and is arranged surrounding the top opening of the cavity 301 , so as to ensure the compactness and firmness of the connection between the elastic cover 200 and the screw cap 300 , and the waterproof effect is improved.
- a connection part 202 extends downward from the bottom end of the elastic cover 200 .
- the connection part 202 extends through the top opening of the cavity 301 , surrounds the periphery of the fixed frame 203 , and is fixedly connected with the fixed frame 203 to further enhance the waterproof effect between the elastic cover 200 and the screw cap 300 .
- the connection of the fixed frame 203 and the elastic cover 200 can enhance the structural integrity of the magnetically driven electric toothbrush head.
- the driving shaft 500 has an inserting section that extends upward through the elastic cover 200 .
- a connecting channel 109 is defined in the brush body 100 for insertion of the flat inserting section.
- the connecting channel 109 extends longitudinally and extends through the bottom of the brush body 100 to form an insertion opening at the bottom of the brush body 100 .
- the inserting section is inserted into the connecting channel 109 through the insertion opening, so that the driving shaft 500 is fixedly connected with the brush body 100 .
- a through groove 105 is transversely arranged in the brush body 100 , and the through groove 105 transversely extends through the brush body 100 .
- the through groove 105 is filled with elastic rubber block, and the elastic rubber block is in a compressed state so as to apply a restoring force to the side wall of the through groove 105 .
- a pressing wall 107 is formed between the through channel 105 and the connecting channel 109 .
- the pressing wall 107 has an internal pressing surface facing the connecting channel 109 and an external pressing surface facing the through channel 105 .
- the middle part of the internal pressing surface is convexed toward the connecting channel 109 , forming a pressing bulge 1071 .
- the brush body 100 has a limiting wall 106 opposite to the pressing wall 107 .
- the pressing wall 107 and the limiting wall 106 are arranged on opposite sides of the through channel 105 respectively.
- the inner side wall of the connecting channel 109 has a straight pressing surface 110 which is arranged opposite to the inner pressing surface, and the straight pressing surface 110 extends smoothly along the axial direction of the connecting channel 109 .
- the inserting section has two opposite insertion sides. When the inserting section is inserted into the connecting channel 109 via the insertion opening, one of the insertion sides of the inserting section contacts and abuts against the straight pressing surface 110 , and the other of the insertion sides of the inserting section abuts against the pressing bulge 1071 .
- the brush body 100 with the through groove 105 can be placed in a mold, and the glue can be injected into the through groove 105 by high pressure through a glue injection channel, so that the through groove 105 is filled with elastic rubber block which is compressed.
- the thickness of the limiting wall 106 is greater than that of the pressing wall 107 and the limiting wall 106 is thick enough to keep it from being deformed outward by the elastic rubber block.
- the compressed elastic rubber block can exert a reaction force on the pressing wall 107 to the maximum extent in a direction toward the connecting channel 109 , making the pressing wall 107 and the straight compression surface 110 more firmly hold/sandwich the inserting section therebetween.
- the resilience of the elastic rubber block applied to the pressing wall 107 is mostly/substantially concentrated in the position of the pressing bulge 1071 .
- the through groove 105 forms a groove opening on the outer wall of the brush body 100 .
- the elastic rubber block has an end layer that seals the groove opening.
- the end layer is hardened, and the outer edge of the end layer is fixedly connected with the outer wall of the brush body 100 . In this way, when the elastic rubber block is squeezed, it can be restricted to protrude towards the groove opening, to avoid destroying the elastic recovery ability of the whole elastic block.
- a cover board can be provided to cover the groove opening.
- the cover board seals the groove opening from outside to inside, and is fixed to the outer wall of the brush body 100 by laser welding or adhesive fixation and so on.
- the pressing wall 107 is curved, and the middle part of the external pressing surface of the pressing wall 107 is depressed toward the connecting channel 109 , forming a depression groove 1072 corresponding to the pressing bulge 1071 , and the elastic rubber block fills the depression groove 1072 .
- the pressing bulge 1071 When the pressing bulge 1071 is pressed by the inserting section, the pressing bulge 1071 will generate elastic deformation toward the through groove 105 , thus, the elastic rubber block in the depression groove 1072 is firstly driven to deform due to being squeezed, which facilitates the elastic deformation of the pressure bulge 1071 , and the recovery force of the elastic rubber block generated due to elastic deformation can be concentrated on the pressing bulge 1071 , so that the pressing bulge 1071 can clamp the inserting section more stably.
- the external pressing surface has an end section 108 in the upper and lower parts of the depression groove 1072 .
- the end sections 108 extend to the depression groove 1072 , and connect with the sidewall of the depression groove 1072 .
- the end section 108 is inclined to the connecting channel 109 . In this way, when the elastic rubber block is deformed by the pressure toward the limiting wall 106 , the extruded elastic rubber block produces the restoring force toward pressing wall 107 .
- the elastic rubber block Due to the inclined arrangement of the end section 108 towards the connecting channel 109 , under the guidance of the inclined end section 108 , the elastic rubber block can be concentrated and deformed towards the position of the depression groove 1072 more easily, so that the restoring force of the elastic rubber block is concentrated to the depression groove 1072 , that is, the extrusion/pushing effect is concentrated on the pressing bulge 1071 .
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- 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
Description
- The present disclosure relates to the technical field of electric toothbrush heads, in particular to a magnetically driven electric toothbrush head.
- With the continuous improvement of the quality of life, electric toothbrushes have been vigorously promoted by the market. A typical electric toothbrush includes a brush head that produces high-frequency vibration through rapid rotation or vibration of a vibration unit, such that the toothpaste is instantly decomposed into tiny bubbles which penetrate into and thus clean crevices between teeth. At the same time, the vibration of bristles of the brush can promote the blood circulation of the mouth and has a massage effect on the gingival tissue.
- The electric toothbrush includes the brush handle and the electric toothbrush head. At present, there are two ways for the brush handle to drive the electric toothbrush head to vibrate. The first is driven by vibration, concretely, the top of the brush handle is provided with a vibration unit. The vibration unit is directly inserted into the electric toothbrush head, and then the vibration of the vibration unit drives the electric toothbrush head to vibrate. The second is driven by magnetism, that is to say, an electromagnet is set in the brush handle, and a permanent magnet is set on the brush head of the electric tooth. Through the magnetic drive between the electromagnet and the permanent magnet, the brush handle is driven to rotate reciprocatingly.
- In the existing technology, as for the magnetically driven electric toothbrush head, because the reciprocating rotation amplitude of the toothbrush head is not large enough, the use effect of electric toothbrush head is poor.
- It is desired to provide an improved magnetically driven electric toothbrush head.
- The present invention provides a magnetically driven electric toothbrush head which comprises a brush body, a movable board arranged movably, and a screw cap. The screw cap has a cavity inside; a top of the screw cap has a top opening in communication with the cavity; an upper end of the brush body is provided with brush hair; the brush body is arranged above the screw cap, and an elastic cover is arranged between a lower end of the brush body and an upper end of the screw cap. Wherein a fixed frame is fixed inside the cavity of the screw cap, the movable board is movable reciprocating laterally after magnetic drive, two twisting plates are arranged in intervals between the fixed frame and the movable board, an upper end of the twisting plate is fixedly connected with the fixed frame and a lower end of the twisting plate is fixedly connected with the movable board, and a resistance of the twisting plate to distortion is less than the resistance to bending. Wherein the movable board is connected with a driving shaft, a lower end of the driving shaft is fixedly connected with the movable board, an upper end of the driving shaft extends upward through the fixed frame and the elastic cover and fixedly connected with a lower end of the brush body, the driving shaft is spaced from the fixed frame and the elastic cover respectively. Wherein a bottom of the movable board is provided with two permanent magnets, a lower end of the screw cap is fixed and connected to an upper end of a brush handle, when an electromagnet in the tooth handle is electrified, under a magnetic effect between the electromagnet and the two permanent magnets and a distortion limit of the twisting plates, the movable board drives the driving shaft and the brush body to rotate synchronously and reciprocatingly. Wherein an upper outer of the twisting plate is provided with a rubber sleeve to form a limiting section, a top of the rubber sleeve is fixedly connected with a bottom of the fixed frame, a lower part of the twisting plate is exposed to form a twisting section, when the twisting plate is twisted, a twisting amplitude of the twisting section is greater than that of the limiting section, a middle part of the twisting section is connected to the driving shaft with a rubber strip, one end of the rubber strip is fixedly connected to the driving shaft, and the other end of the rubber strip is wrapped in a middle part of the twisting section, and the rubber strip is movably connected to the twisting section.
- In some embodiments, the movable board is provided, on its top, with an elastic plate with horizontal distortion due to compression, the elastic plate is movably arranged on the movable board, a lower end of the twisting section extends through the elastic plate and is fixedly connected with the elastic plate, a sector-shaped guide groove with an arc outer wall is defined in the elastic plate, the driving shaft movably moves through the arc-shape guide groove, and a radian of the arc-shaped outer wall of the sector-shaped guide groove is same as that of the reciprocating rotation of the driving shaft.
- In some embodiments, an inner side of the sector-shaped guide groove has a short inner wall, an outer side of the sector-shaped guide groove has a long outer wall, a limit groove is defined in a middle of the short inner wall, the driving shaft is flat, an inner side of the driving shaft is embedded in the limit groove and is connected with an inner side of the limit groove, an outer side of the driving shaft is oriented towards the long outer wall, and a gap is formed between the driving shaft and the long outer wall. When the electromagnet in the brush handle is energized, under a magnetic effect between the electromagnet and the two permanent magnets and a twisting restriction of the twisting plate, and the outer side of the driving shaft rotates reciprocatingly with its inner side as a rotation center.
- In some embodiments, a bottom end of the brush body has a ring bottom portion oriented downward, the elastic cover has a ring top portion abutting against the ring bottom portion of the brush body, an upper ring groove is defined in the ring bottom portion and is upward depressed, a lower ring groove is defined in the ring top portion and is downward depressed, and the upper ring groove is aligned with the lower ring groove. Wherein the upper ring groove is provided with a rolling ball that is capable of rolling circumferentially along the upper ring groove, and a lower side of the rolling ball is movably placed in the lower ring groove.
- In some embodiments, a bottom end of the elastic cover has an annular step oriented downward, the annular step is connected to a top of the screw cap and is arranged around a top opening of the cavity, a connection part extends downward from the bottom end of the elastic cover, and the connection part extends through the top opening of the cavity, surrounds the periphery of the fixed frame, and is fixedly connected with the fixed frame.
- In some embodiments, the driving shaft has a flat inserting section that extends upward through the elastic cover, a connecting channel is defined in the brush body for insertion of the flat inserting section, the connecting channel is arranged longitudinally and extends through a bottom of the brush body to form an insertion opening at the bottom of the brush body, a through groove transversely extends through the brush body, the through groove is filled with elastic rubber block which is in a compressed state. Wherein, a pressing wall is formed between the through channel and the connecting channel, the pressing wall has an internal pressing surface facing the connecting channel and an external pressing surface facing the through channel, a central part of the internal pressing surface is convexed towards the connecting channel to form a pressing bulge, the brush body has a limiting wall opposite to the pressing wall, and the pressing wall and the limiting wall are arranged on opposite sides of the through channel respectively. Wherein an inner side wall of the connecting channel has a straight pressing surface which is arranged facing to the internal pressing surface, the straight pressing surface extends along the axial direction of the connecting channel, the inserting section has two opposite insertion sides, and when the inserting section is inserted into the connecting channel via the insertion opening, one of the insertion sides of the inserting section contacts and abuts against the straight pressing surface, and the other of the insertion sides of the inserting section abuts against the pressing bulge.
- In some embodiments, a thickness of the limiting wall is greater than that of the pressing wall.
- In some embodiments, the through groove forms a groove opening on the outer wall of the brush body, the elastic rubber block has an end layer that seals the groove opening, the end layer is hardened, and an outer edge of the end layer is fixedly connected with the outer wall of the brush body.
- In some embodiments, the pressing wall is curved, a middle part of the external pressing surface of the pressing wall is depressed toward the connecting channel to form a concaved groove corresponding to the pressing bulge, and the elastic rubber block fills the concaved groove.
- In some embodiments, the external pressing surface has an end section in upper and lower parts of the concaved groove, the end section extends to the concaved groove and connects with the sidewall of the concaved groove, and along the extension direction of the end section to the concaved groove, the end section being inclined to the connecting channel.
-
FIG. 1 is a perspective view of a magnetically driven electric toothbrush head according to one embodiment of the present disclosure. -
FIG. 2 is a partial perspective view of the magnetically driven electric toothbrush head according to one embodiment of the present disclosure. -
FIG. 3 illustrates a brush handle according to one embodiment of the present disclosure. -
FIG. 4 illustrates a twisting plate according to one embodiment of the present disclosure. -
FIG. 5 illustrates cooperation of a twisting plate, a rubber strip and a driving shaft according to one embodiment of the present disclosure. -
FIG. 6 illustrates connection of twisting plates, an elastic plate and a driving shaft according to one embodiment of the present disclosure. -
FIG. 7 illustrates a sector-shaped guide groove according to one embodiment of the present disclosure. -
FIG. 8 illustrates cooperation of an upper ring groove, a lower ring groove and a rolling ball according to one embodiment of the present disclosure. -
FIG. 9 is an internal view of a brush body according to one embodiment of the present disclosure. - In order to make the purpose, technical scheme and advantages of the disclosure clearer, the following illustration and implementation examples are combined to further explain the disclosure. The specific embodiments described here are only used to explain the disclosure and are not used to limit the disclosure.
- In the following, the realization of the disclosure is described in detail with specific embodiments.
- The same or similar labels in the figures to this embodiment correspond to the same or similar components; in the description of the disclosure, if the orientation or position relationship indicated by the terms “upper”, “lower”, “left” and “right” is based on the orientation or position relationship shown in the figures, it is only for the convenience of describing the disclosure and simplifying the description, rather than indicating or suggesting that the device or component referred to must have a specific orientation, construct and operate in a specific orientation. Therefore, the terms used to describe the position relationship in the figures are only used for illustrative description and cannot be understood as a limitation to the disclosure. For ordinary technicians in this field, the specific meaning of the term can be understood on a case-by-case basis.
- Referring to
FIGS. 1-9 , a preferred embodiment of the present disclosure is described below. - Referring to
FIGS. 1-5 , a magnetically driven electric toothbrush head according to this embodiment, includes abrush body 100, amovable board 400 arranged movably, and ascrew cap 300. Thescrew cap 300 has acavity 301 inside. A top of thescrew cap 300 has a top opening in communication with thecavity 301. Thecavity 301 extends through a top and a bottom of thescrew cap 300 such that thescrew cap 300 forms a hollow structure. An upper end of thebrush body 100 is provided withbrush hair 101. During the use of the magnetically driven electric toothbrush head, thebrush hair 101 is used to clean the teeth of the user. Thebrush body 100 is set above thescrew cap 300, and anelastic cover 200 is set between the lower end of thebrush body 100 and the upper end of thescrew cap 300. In this way, thebrush body 100 and thescrew cap 300 can move relatively. - A
fixed frame 203 is fixedly arranged in thecavity 301 of thescrew cap 300 while themovable board 400 can move relative to thescrew cap 300. When driven by a magnetic force, themovable board 400 will move reciprocatingly and laterally. Between thefixed frame 203 and themovable board 400, twotwisting plates 600 are arranged in intervals. The upper ends of thetwisting plate 600 are fixedly connected with thefixed frame 203, and the lower ends of thetwisting plate 600 are fixedly connected with themovable board 400. The resistance of thetwisting plate 600 to distortion is less than the resistance to bending. In this way, when themovable board 400 is driven by magnetic force and swings back and forth, the twistingplates 600 will twist back and forth without bending. - The
movable board 400 is connected with a drivingshaft 500. The lower end of the drivingshaft 500 is fixedly connected with themovable board 400. The upper end of the drivingshaft 500 extends upward through the fixedframe 203 and theelastic cover 200, and fixedly connected with the lower end of thebrush body 100. The drivingshaft 500 and the fixedframe 203 are arranged at regular intervals, and the drivingshaft 500 and theelastic cover 200 are arranged at regular intervals, too. In other words, there is no connection between the drivingshaft 500 and the fixedframe 203 and no connection between the drivingshaft 500 and theelastic cover 200. Therefore, the fixedframe 203 and theelastic cover 200 will not impose any restriction on the drivingshaft 500. - The bottom of the
movable board 400 is provided with twopermanent magnets 401. The lower end of thescrew cap 300 is fixed and connected to the upper end of thebrush handle 800, and inside of thebrush handle 800 is equipped with anelectromagnet 801 and abattery 802. When theelectromagnet 801 is electrified, under a magnetic effect between theelectromagnet 801 and the twopermanent magnets 401 and a distortion limit of the twistingplate 600, themovable board 400 drives the drivingshaft 500 and thetoothbrush body 100 to rotate synchronously and reciprocatingly. - When the
electromagnet 801 is electrified, the magnetic effect between theelectromagnet 801 and thepermanent magnet 401 can drive themovable board 400 to move reciprocatingly and laterally. However, under the restriction of the twistingplates 600, the twistingplates 600 will be distorted during the movement of themovable board 400. Thus, themovable board 400 obtains a reciprocating rotation movement, which results in the drivingshaft 500 fixedly connected to themovable board 400 rotating reciprocatingly, and consequently thebrush body 100 rotating reciprocatingly . As a result, the toothbrush hair101 on thebrush body 100 also rotates reciprocatingly to clean the teeth. - The outer surface of the upper part of the twisting
plate 600 is provided with arubber sleeve 601 to form a limiting section, and the top of therubber sleeve 601 is fixedly connected with the bottom of the fixedframe 203. In this way, the upper part of the twistingplate 600 is restricted by therubber sleeve 601 not to be twisted. The lower part of the twistingplate 600 is exposed to form atwisting section 602. When the twistingplate 600 is twisted, the twisting amplitude of thetwisting section 602 is greater than that of the limiting section. In this way, when the twistingplate 600 is driven to twist, its twisting motion is basically limited to thetwisting section 602, which can increase the twisting amplitude of the twisting section 602and consequently allows thetwisting section 602 to drive the drivingshaft 500 to rotate with an increased amplitude. Moreover, the twisting motion is basically limited to thetwisting section 602, which can reduce the overall deformation of the twistingplate 600, greatly extend the service life of the twisting plate, and avoid the premature twisting failure of the twistingplate 600 which results in the failure of the electric toothbrush head to achieve the effect of cleaning the teeth. - The middle part of the
twisting section 602 is connected to the drivingshaft 500 with arubber strip 603, and therubber strip 603 is telescopic. One end of therubber strip 603 is fixedly connected to the drivingshaft 500, and the other end of therubber strip 603 is wrapped on the middle part of thetwisting section 602. Moreover, therubber strip 603 is movably connected to thetwisting section 602. When themovable board 400 moves in reciprocating motion, the two twistingplates 600 synchronously twists in the same direction. At the same time, the twistingplates 600 pull therubber strip 603 to cause therubber strip 603 to deform. During the deformation, the rubber strips 603 pull the drivingshaft 500 synchronously and drive themovable board 400 for reciprocating rotation synchronously and reversely. In this way, not only themovable board 400 can drive the drivingshaft 500 for reciprocating rotation in one direction, but also the elastic force generated by the deformation of therubber strip 603 can drive themovable board 400 and the drivingshaft 500 to do reciprocating rotation synchronously and reversely, which achieves the effect of double-driving. Driven by themovable board 400 and pulled by therubber strip 603, the reciprocating rotation of the drivingshaft 500 can be strengthen, and the reciprocating rotation path of the drivingshaft 500 can be guided and the rotation trajectory is limited to thereby enhance the orderliness of the reciprocating rotation of the drivingshaft 500. - As for the magnetically driven electric toothbrush head provided above, when the
screw cap 300 is connected to thebrush handle 800, under the magnetic drive between theelectromagnet 801 and thepermanent magnet 401 and the twisting limit of the twistingplates 600, themovable board 400 drives the drivingshaft 500 to rotate reciprocatingly. By arranging therubber sleeve 601 on the upper part of the twistingplate 600, the twisting movement of the twistingplate 600 can be basically limited to thetwisting section 602, and the middle part of thetwisting section 602 is connected with the drivingshaft 500 via the rubber strips 603. The distortion of thetwist section 602 results in deformation of therubber strip 603, and the deformation of therubber strip 603 drives themovable board 400 to rotate reciprocatingly, thereby strengthening the reciprocating rotation of the drivingshaft 500, improving the performance of the magnetically driven electric toothbrush head, and increasing the service life of the magnetically driven electric toothbrush head. - Referring to
FIG. 6 , the top of themovable board 400 is provided with anelastic plate 700 with horizontal distortion due to be compressed, and theelastic plate 700 is arranged on themovable board 400. The lower end of thetwisting section 602 extends through theelastic plate 700 and is fixedly connected with theelastic plate 700. A sector-shapedguide groove 701 is defined in theelastic plate 700. The drivingshaft 500 movably passes through theguide groove 701. The sector-shapedguide groove 701 has an arc-shapedouter wall 703 and the radian of theouter wall 703 is same as that of the reciprocating rotation of the drivingshaft 500. - Because the distortion amplitude of the lower end of the
twisting section 602 is small, the distortion of the lower end of thetwisting section 602 can be restricted/limited/reduced by setting theelastic plate 700 on themovable board 400, so that the distortion of thetwisting section 602 is substantially concentrated in the middle part of thetwisting section 602, and the distortion of the middle of thetwisting section 602 is enhanced. Secondly, the arc-shape guide groove 701 can restrict and guide the reciprocating rotation trajectory of the drivingshaft 500, so as to enhance the orderliness of the reciprocating rotation of the drivingshaft 500. - Referring to
FIG. 7 , the inner side of theguide groove 701 has a short inner wall, and the outer side of the sector-shapedguide groove 701 has a long arc-shapedouter wall 703. Alimit groove 702 is defined in the middle of the short inner wall, and the drivingshaft 500 is flat. The inner side of the drivingshaft 500 is embedded in thelimit groove 702, and abuts against the inner side of thelimit groove 702. The outer side of the drivingshaft 500 is oriented towards the longouter wall 703, and a gap is formed between the outer side of the drivingshaft 500 and the longouter wall 703. When theelectromagnet 801 in thebrush handle 800 is energized, under the magnetic effect between theelectromagnet 801 and the twopermanent magnets 801 and the twisting restriction of the twistingplates 600, the outer side of the drivingshaft 500 rotates reciprocating in the direction of arrow as shown inFIG. 6 with its inner side as the rotation center. - When the driving
shaft 500 rotates in reciprocating motion, the drivingshaft 500 is rotating with its inner side as the rotation center, and its outer side as the rotation arm. In this way, by setting thelimit groove 702, the inner side of the drivingshaft 500 is embedded in thelimit groove 702, which can limit and guide the reciprocating motion of the drivingshaft 500, and further ensure the orderliness of the reciprocating motion of the drivingshaft 500. - Referring to
FIG. 8 , thebrush body 100 has aring bottom portion 104, which is oriented downward. Theelastic cover 200 has aring top portion 205, which is oriented upward. Thering bottom portion 104 is connected to thering top portion 205. Anupper ring groove 102 is set in thering bottom portion 104 and is sunken upward from the ring bottom portion, and alower ring groove 204 is defined in thering top portion 205 and is sunken downward. Theupper ring groove 102 is aligned with thelower ring groove 204. - The
upper ring groove 102 is provided with a rollingball 103 that rolls circumferentially along theupper ring groove 102, the upper side of the rollingball 103 is movably received in theupper ring groove 102. The lower part of theball 103 extends downward beyond theupper ring groove 102, and the lower side of theball 103 is movably received in thelower ring groove 204. In this way, during the reciprocating rotation of the drivingshaft 500, a full surface matching between the bottom of thebrush body 100 and the upper end of theelastic cover 200 is avoided. The rollingball 103 is used to rotate in theupper ring groove 102 and thelower ring groove 204, which can enhance the smoothness and orderliness of thebrush body 100 in the rotation process, and avoid the deformation ofelastic cover 200 due to excessive friction during reciprocating rotation of brush bodyl00. - The bottom end of the
elastic cover 200 has anannular step 201 oriented downward, and theannular step 201 abuts and contacts the top end of thescrew cap 300, and is arranged surrounding the top opening of thecavity 301, so as to ensure the compactness and firmness of the connection between theelastic cover 200 and thescrew cap 300, and the waterproof effect is improved. Aconnection part 202 extends downward from the bottom end of theelastic cover 200. Theconnection part 202 extends through the top opening of thecavity 301, surrounds the periphery of the fixedframe 203, and is fixedly connected with the fixedframe 203 to further enhance the waterproof effect between theelastic cover 200 and thescrew cap 300. The connection of the fixedframe 203 and theelastic cover 200 can enhance the structural integrity of the magnetically driven electric toothbrush head. - Referring to
FIG. 9 , the drivingshaft 500 has an inserting section that extends upward through theelastic cover 200. A connectingchannel 109 is defined in thebrush body 100 for insertion of the flat inserting section. The connectingchannel 109 extends longitudinally and extends through the bottom of thebrush body 100 to form an insertion opening at the bottom of thebrush body 100. The inserting section is inserted into the connectingchannel 109 through the insertion opening, so that the drivingshaft 500 is fixedly connected with thebrush body 100. A throughgroove 105 is transversely arranged in thebrush body 100, and the throughgroove 105 transversely extends through thebrush body 100. The throughgroove 105 is filled with elastic rubber block, and the elastic rubber block is in a compressed state so as to apply a restoring force to the side wall of the throughgroove 105. - A
pressing wall 107 is formed between the throughchannel 105 and the connectingchannel 109. Thepressing wall 107 has an internal pressing surface facing the connectingchannel 109 and an external pressing surface facing the throughchannel 105. The middle part of the internal pressing surface is convexed toward the connectingchannel 109, forming apressing bulge 1071. Thebrush body 100 has a limitingwall 106 opposite to thepressing wall 107. Thepressing wall 107 and the limitingwall 106 are arranged on opposite sides of the throughchannel 105 respectively. When the inserting section is inserted into the connectingchannel 109, thepressing bulge 1071 is squeezed towards the elastic rubber block, and the elastic rubber block is further compressed, and the restoring force of thepressure wall 107 to the inserting section is increased. - The inner side wall of the connecting
channel 109 has a straightpressing surface 110 which is arranged opposite to the inner pressing surface, and the straightpressing surface 110 extends smoothly along the axial direction of the connectingchannel 109. The inserting section has two opposite insertion sides. When the inserting section is inserted into the connectingchannel 109 via the insertion opening, one of the insertion sides of the inserting section contacts and abuts against the straightpressing surface 110, and the other of the insertion sides of the inserting section abuts against thepressing bulge 1071. - When the inserting section is inserted into the connecting
channel 109, one insertion side is pressed on the straightpressing surface 110, and the other insertion side is pressed against thepressing bulge 1071. Restoring force exerted on thepressing wall 107 by the elastic rubber block filled in the throughgroove 105 urges the pressing bulge1071 of thepressing wall 107 towards the inserting section, which makes the inserting section be firmly clamped and fixed in the connectingchannel 109. By directly forming the connectingchannel 109 in thebrush body 100, no additional insertion structure is needed, the structure is simple, and the cost is saved. - In the practical manufacturing, the
brush body 100 with the throughgroove 105 can be placed in a mold, and the glue can be injected into the throughgroove 105 by high pressure through a glue injection channel, so that the throughgroove 105 is filled with elastic rubber block which is compressed. - The thickness of the limiting
wall 106 is greater than that of thepressing wall 107 and the limitingwall 106 is thick enough to keep it from being deformed outward by the elastic rubber block. In this way, the compressed elastic rubber block can exert a reaction force on thepressing wall 107 to the maximum extent in a direction toward the connectingchannel 109, making thepressing wall 107 and thestraight compression surface 110 more firmly hold/sandwich the inserting section therebetween. And the resilience of the elastic rubber block applied to thepressing wall 107 is mostly/substantially concentrated in the position of thepressing bulge 1071. - The through
groove 105 forms a groove opening on the outer wall of thebrush body 100. The elastic rubber block has an end layer that seals the groove opening. The end layer is hardened, and the outer edge of the end layer is fixedly connected with the outer wall of thebrush body 100. In this way, when the elastic rubber block is squeezed, it can be restricted to protrude towards the groove opening, to avoid destroying the elastic recovery ability of the whole elastic block. - As for a further preferred embodiment, a cover board can be provided to cover the groove opening. The cover board seals the groove opening from outside to inside, and is fixed to the outer wall of the
brush body 100 by laser welding or adhesive fixation and so on. - The
pressing wall 107 is curved, and the middle part of the external pressing surface of thepressing wall 107 is depressed toward the connectingchannel 109, forming adepression groove 1072 corresponding to thepressing bulge 1071, and the elastic rubber block fills thedepression groove 1072. When thepressing bulge 1071 is pressed by the inserting section, thepressing bulge 1071 will generate elastic deformation toward the throughgroove 105, thus, the elastic rubber block in thedepression groove 1072 is firstly driven to deform due to being squeezed, which facilitates the elastic deformation of thepressure bulge 1071, and the recovery force of the elastic rubber block generated due to elastic deformation can be concentrated on thepressing bulge 1071, so that thepressing bulge 1071 can clamp the inserting section more stably. - The external pressing surface has an
end section 108 in the upper and lower parts of thedepression groove 1072. Theend sections 108 extend to thedepression groove 1072, and connect with the sidewall of thedepression groove 1072. Along the extension direction of theend section 108 to thedepression groove 1072, theend section 108 is inclined to the connectingchannel 109. In this way, when the elastic rubber block is deformed by the pressure toward the limitingwall 106, the extruded elastic rubber block produces the restoring force toward pressingwall 107. Due to the inclined arrangement of theend section 108 towards the connectingchannel 109, under the guidance of theinclined end section 108, the elastic rubber block can be concentrated and deformed towards the position of thedepression groove 1072 more easily, so that the restoring force of the elastic rubber block is concentrated to thedepression groove 1072, that is, the extrusion/pushing effect is concentrated on thepressing bulge 1071. - The foregoing is only a preferred embodiment of the disclosure and shall not be used to limit the disclosure. Any modification, equivalent replacement or improvement made within the spirit and principles of the disclosure shall be included within the scope of protection of the disclosure.
Claims (10)
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Cited By (2)
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US11872098B1 (en) | 2023-10-09 | 2024-01-16 | Lei Huang | Electric toothbrush head |
USD1023581S1 (en) * | 2023-12-06 | 2024-04-23 | Xiaofeng Ruan | Toothbrush head |
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WO2018046760A1 (en) * | 2016-09-12 | 2018-03-15 | Koninklijke Philips N.V. | Drive train assembly for a personal care device |
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US7067945B2 (en) * | 2002-05-03 | 2006-06-27 | Koninklijke Philips Electronics N.V. | Apparatus for converting side-to-side driving motion to rotational motion with a spring assembly and system for tuning the spring assembly |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US11872098B1 (en) | 2023-10-09 | 2024-01-16 | Lei Huang | Electric toothbrush head |
USD1023581S1 (en) * | 2023-12-06 | 2024-04-23 | Xiaofeng Ruan | Toothbrush head |
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