CN114652476A - Brush head for electric toothbrush and electric toothbrush with same - Google Patents
Brush head for electric toothbrush and electric toothbrush with same Download PDFInfo
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- CN114652476A CN114652476A CN202210241667.5A CN202210241667A CN114652476A CN 114652476 A CN114652476 A CN 114652476A CN 202210241667 A CN202210241667 A CN 202210241667A CN 114652476 A CN114652476 A CN 114652476A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 185
- 238000003780 insertion Methods 0.000 claims abstract description 93
- 230000037431 insertion Effects 0.000 claims abstract description 93
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000010008 shearing Methods 0.000 abstract description 10
- 241001391944 Commicarpus scandens Species 0.000 abstract description 8
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000004323 axial length Effects 0.000 description 5
- 230000001680 brushing effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003699 hair surface Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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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
- A61C17/222—Brush body details, e.g. the shape thereof or connection to 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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- 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
The invention discloses a brush head for an electric toothbrush and an electric toothbrush with the same, wherein the electric toothbrush comprises: the toothbrush comprises a toothbrush head and a handle, wherein the toothbrush head is detachably inserted in a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted in the transmission rod, the free end face of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, and the distance from the groove to the free end face is smaller than the depth 3/4 of the insertion part to which the transmission rod can be inserted. The groove is close to the end face of the transmission rod. When the electric toothbrush is vibrated by external force or falls down from a high place, the difference of the acting forces in opposite directions on the two parts of the transmission rod at the two sides of the groove is large, so that the shearing force applied to the transmission rod at the groove is small, and the groove part on the transmission rod is not easy to break due to stress concentration.
Description
The application is a division entitled "an electric toothbrush" and having an application number of "CN 201910298602.2" filed by Guangzhou interstellar Happy moving stocks Co., Ltd in 2019, 4 and 15.
Technical Field
The invention relates to the field of tooth cleaning devices, in particular to a brush head for an electric toothbrush and the electric toothbrush with the same.
Background
The electric toothbrush generally comprises a handle and a brush head which are separately arranged, a power supply and a motor are arranged in the handle, a transmission rod extending out of the handle is arranged on the motor, a soft bristle body which is directly contacted with teeth during tooth brushing is arranged on the brush head, the brush head is inserted into the transmission rod of the handle, and when the motor runs, the motor drives the brush head to vibrate to realize the tooth brushing function of the electric toothbrush.
A common electric toothbrush in the market comprises a handle and a brush head, wherein the brush head is inserted into a transmission rod extending out of the handle, one side of the transmission rod, which is positioned in the handle, is connected with a motor, the transmission rod is used for transmitting acting force generated by the operation of the motor to the brush head, and the brush head vibrates at a high speed under the driving of the transmission rod to realize the function of brushing teeth. When brushing teeth, the brush head is in a high-speed vibration state, the vibration frequency is between 200 and 500Hz, if a large relative displacement is generated between the brush head and the transmission rod, the teeth are damaged, in order to prevent the large relative displacement between the brush head and the transmission rod along the axial direction of the transmission shaft, a groove is usually arranged on the transmission rod, meanwhile, a bulge corresponding to the groove is arranged on a connecting part in the brush head, and the bulge and the groove on the connecting part in the brush head can prevent the brush head from axially sliding along the shaft.
When the electric toothbrush is vibrated or falls from a high place to fall, the stress of the transmission rod in the electric toothbrush is schematically shown, when the brush head of the electric toothbrush is firstly landed, the part of the transmission rod, which is positioned at the side of the brush head, is subjected to an upward acting force applied to the transmission rod by the ground, the part of the transmission rod, which is positioned at the side of the handle, is subjected to a downward acting force applied by gravity, and the groove is subjected to a shearing force formed by the upward acting force and the downward acting force, so that the groove is easy to break. And the closer the groove is to the midpoint of the transmission rod, the larger the shearing force borne by the groove is when the electric toothbrush falls, and the more easily the groove is broken.
In a common electric toothbrush, a groove on a transmission rod is usually arranged at a position close to the midpoint of the transmission rod, and when the electric toothbrush falls due to a fault, because the two parts of the transmission rod at the two sides of the groove are subjected to similar forces and opposite directions, the transmission rod is subjected to larger shearing force at the groove, and is easy to break.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a brush head for an electric toothbrush and the electric toothbrush with the same, which overcome the defect that a groove on a transmission rod is arranged close to the midpoint of the transmission rod in the prior art, so that the transmission rod is easy to break.
In a first aspect, embodiments of the present specification disclose an electric toothbrush comprising: the toothbrush comprises a toothbrush head and a handle, wherein the toothbrush head is detachably inserted in a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted in the transmission rod, the free end face of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, and the distance from the groove to the free end face 6 is smaller than the depth 3/4 of the insertion part to which the transmission rod can be inserted.
Furthermore, the distance from the recess to the free end face is less than 1/3 of the depth of the insertion of the transmission rod into the insertion part.
Furthermore, the distance from the recess to the free end face is less than 1/4 of the depth of the insertion of the transmission rod into the insertion part.
Furthermore, the distance from the recess to the free end face is 1/6 of the depth of the insertion of the transmission rod into the insertion part.
Further, the groove is in a ring shape formed by surrounding the transmission rod, when the ratio of the depth of the groove to the minimum diameter of the transmission rod at the groove is less than 1:2, the distance from the groove to the free end face is 1-5 times of the minimum diameter of the transmission rod at the groove, and 5 times of the minimum diameter of the transmission rod at the groove is less than 3/4 of the depth of the insertion part where the transmission rod can be inserted.
Furthermore, the distance from the groove to the free end face is 1-15 times the depth of the groove, and 15 times the depth of the groove is smaller than 3/4 of the depth of the insertion part where the transmission rod can be inserted.
Furthermore, the transmission rod is a circular rod, a first plane and a second plane which extend from the free end face along the axial direction of the transmission rod are arranged on the transmission rod, the first plane and the second plane are oppositely arranged, and a third plane corresponding to the first plane and a fourth plane corresponding to the second plane are arranged on the inserting portion.
Further, the distance from the groove to the free end face is smaller than the length of the first plane in the axial direction of the transmission rod and smaller than the length of the second plane in the axial direction of the transmission rod.
Further, the cross section of the groove is trapezoidal or triangular, and the included angle between the side surface of the groove and the top surface of the groove is 145-175 degrees.
Furthermore, the inserting part is provided with an elastic part, the elastic part is provided with a bulge corresponding to the groove, and the inserting part is provided with an opening opposite to the elastic part.
Compared with the prior art, the electric toothbrush provided by the specification has the advantages that the brush head is detachably inserted in the transmission rod of the handle, the brush head is internally provided with the insertion part, the transmission rod is provided with the groove connected with the insertion part, and the groove is close to the end face of the transmission rod. Because the groove on the transmission rod is close to the end face of the transmission rod, when the electric toothbrush is vibrated by external force or falls down from a high position, the magnitude difference of acting forces in opposite directions on the two parts of the transmission rod at the two sides of the groove is large, so that the shearing force applied to the transmission rod at the groove is small, and the groove part on the transmission rod is not easy to break due to stress concentration.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of the transmission rod under force when the electric toothbrush of the background art is dropped;
FIG. 2 is a schematic view of a power toothbrush provided herein;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic sectional view taken along line B-B of FIG. 2;
FIG. 5 is a schematic cross-sectional view taken along line C-C of FIG. 2 of the present specification;
FIG. 6 is a schematic cross-sectional view taken along line D-D of FIG. 2;
FIG. 7 is an enlarged view of E in FIG. 2;
fig. 8 is a schematic view of the structure of the drive rod and handle of an electric toothbrush of the present disclosure.
In the figure:
1 is a brush head, 2 is a handle, 4 is a transmission rod, 42 is a short side, 43 is a second long side, 44 is a first long side, 5 is an insertion part, 51 is an elastic part, 6 is a free end surface, and 7 is a groove.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In this specification, there is provided an electric toothbrush, which is described in detail one by one in the following examples.
Fig. 2 is a schematic view showing a structure of an electric toothbrush according to an embodiment of the present disclosure. As shown in fig. 2, an electric toothbrush includes: the toothbrush comprises a toothbrush head 1 and a handle 2, wherein the toothbrush head 1 is detachably inserted into a transmission rod 4 of the handle 2, an insertion part 5 is arranged in the toothbrush head 1, when the toothbrush head 1 is inserted into the transmission rod 4, a free end face 6 of the transmission rod 4 is positioned in the insertion part 5, a groove 7 connected with the insertion part 5 is arranged on the transmission rod 4, as shown in figure 7, the distance L1 from the groove 7 to the free end face 6 is smaller than 3/4 of the depth L2 of the insertion part 5, and at the moment, the groove 7 is close to the free end face 6 of the transmission rod 4 and is far away from the midpoint of the transmission rod 4. Because the groove 7 is close to the end face of the transmission rod 4, when the electric toothbrush is vibrated by external force or falls down from a high place, the difference of the acting forces in opposite directions on the two parts of the transmission rod 4 at the two sides of the groove 7 is large, so that the shearing force applied to the transmission rod 4 at the groove 7 is small, and the groove 7 on the transmission rod 4 is not easy to break due to stress concentration.
As shown in fig. 1, when the electric toothbrush is dropped, the transmission lever 4 is subjected to an upward force F2 and a downward force F1. The force F2 is the product of the distributed load q1 and the distance L2 from the free end face 6 to the groove 7, and the force F1 is the product of the distributed load q2 and the distance L3 from the groove 7 to the connection of the drive rod 4 and the motor driving the drive rod 4 to vibrate. The shearing force applied to the groove 7 is F2 which is the smaller of the forces F1 and F2, the shearing stress tau applied to the groove 7 is F2/A and q 1L 4/A, and A is the minimum area of the cross section of the groove 7. Therefore, the closer the distance between the groove 7 and the free end surface 6 is, the smaller the shear stress is applied to the groove 7, the larger the area of the cross section of the groove 7 is, the smaller the shear stress applied to the groove 7 is, and the more the transmission rod 4 is not easily broken.
The handle 2 is provided with a motor for driving the brush head 1 to vibrate and a power supply for driving the motor to operate, one end of the transmission rod 4 is connected with the motor, the other end is inserted in the brush head 1, and when the motor is started, the transmission rod 4 drives the brush head to vibrate at a frequency of 200-500 Hz. The transmission rod 4 can be in the shape of a cylinder, a rectangle, a cone, etc. The transmission rod 4 in fig. 2 is a cylindrical rod, and the recess 7 is in the form of a ring formed around the circumference of the transmission rod 4. When the transmission rod 4 is a cylindrical rod, when the transmission rod 4 is inserted into the brush head 1, a first plane and a second plane which extend from the free end surface 6 of the transmission rod 4 along the axial direction of the transmission rod 4 are arranged on the transmission rod 4 in the brush head 1, the first plane and the second plane are oppositely arranged, the distance from the groove 7 to the free end surface 6 is smaller than the axial length of the first plane along the transmission rod 4 and smaller than the axial length of the second plane along the transmission rod 4, when the transmission rod 4 is in transmission with the brush head 1, the connection between the transmission rod 4 and the brush head 1 is firm, and the brush head 1 is prevented from generating large vibration and damaging teeth in use.
The brush head 1 is provided with a plug-in part 5 connected with the transmission rod 4, and the plug-in part 5 is provided with a third plane corresponding to the first plane and a fourth plane corresponding to the second plane. The insertion part 5 is provided with a resilient member 51, and the resilient member 51 is provided with a projection corresponding to the recess 7. For the easy insertion of the transmission rod 4 into the insertion part 5, the insertion part 5 is provided with an opening opposite the spring element 52. The third plane of the plug-in part 5 is matched with the first plane, and the fourth plane is matched with the second plane, so that the rotation of the transmission rod 4 can be blocked, and the purpose of enabling the transmission rod 4 to swing in a small amplitude so as to drive the brush head 1 to vibrate at a high speed is achieved.
The cross-sectional shape of the groove 7 in the axial direction of the transmission rod 4 includes, but is not limited to, trapezoidal, triangular, circular arc, etc. In order to facilitate the assembly and disassembly of the brush head 1, when the cross section of the groove 7 is trapezoid or triangle, the included angle between the side surface of the groove and the top surface of the groove is 145-175 degrees, when the brush head 1 is used, in order to prevent the brush head 1 and the transmission rod 4 from large displacement sliding along the axial direction, the protrusion arranged on the elastic element 51 corresponding to the groove 7 and the groove 7 should have the same shape.
The end of the insertion part 5 close to the bristles of the brush head 1 is closed, and the elastic element 51 on the insertion part 5 should also be close to the closed end of the insertion part 5, since the recess 7 is close to the free end face 6 of the driving rod 4. Preferably, one end of the elastic member 51 is connected to the end face of the insertion portion 5. The side wall of the insertion part 5 is provided with a through hole for accommodating the elastic member 51, one end of the elastic member 51 is connected with the side wall of the through hole of the insertion part 5, and the protrusion on the elastic member 51 is positioned at the inner side of the insertion part 5. The elastic member 5 includes, but is not limited to, a metal member and a plastic member having a certain elasticity when being pressed. The resilient member 51 may be integrally formed with the insertion portion 5 as shown in fig. 2. The resilient element 51 may also be a metal element fixedly attached to the insertion part 5.
As shown in fig. 8, the groove 7 divides the transmission rod 4 into a short side 42 and a long side, and a first plane extending in the axial direction and arranged oppositely divides the long side into a first long side portion 44 close to the groove 7 and a second long side portion 43 relatively far from the groove 7. Fig. 3 is a schematic structural view of a section a-a in fig. 2. The short side edge 42 comprises a part of the first plane and a part of the second plane, and the side of the short side edge 42 adjacent to the first plane and the second plane is connected to the elastic member 51.
The groove 7 is arranged in a ring shape, fig. 4 is a structural schematic diagram of a section B-B in fig. 2, the cross section of the transmission rod 4 at the groove 7 is circular, the transmission rod 4 at the groove 7 is connected with the protrusion on the elastic piece 51, and the connection of the groove 7 and the protrusion can play a role in preventing the brush head 1 from falling off from the transmission rod 4.
Fig. 5 is a schematic view of the cross section C-C in fig. 2, the first long side portion 44 includes another portion of the first plane and another portion of the second plane, and the first long side portion 44 and the short side 42 together function as a limit for limiting the rotation of the driving rod 4. Be provided with the brush hair surface that can be used for implanting the brush hair on the brush head 1, first plane and second plane all are parallel with the brush hair surface, first plane and second plane are different along 4 axial length of transfer line, and the second plane that is far away from the brush hair surface on the brush head 1 is longer along 4 axial length of transfer line along the second plane of transfer line 4 to prevent that brush head 1 when high-speed vibrations under the drive of motor, because of the spacing effort of first plane is not enough and harm the tooth. The second plane is relatively short along the axial length of the transmission rod 4, so that the brush head 1 can be limited, the strength of the transmission rod 4 is reduced slightly, and the transmission rod 4 is not easy to break. The lower part of fig. 4 is the gap between the elastic element 51 and the insertion part 5.
Fig. 6 is a schematic view of the section D-D in fig. 2, in which the cross section of the second long side portion 43 and the cross section of the insertion portion 5 are circular.
The inserting part 5 and the brush head 1 in figure 2 are two separated structural parts, and the inserting part 5 is inserted in an inner cavity of the brush head 1 close to the end surface.
The transmission rod 4 is a cylindrical long rod, and a first plane and a second plane which extend along the axial direction and are oppositely arranged are arranged on the short side 42 and the long side 43.
The present specification also provides an electric toothbrush comprising: the toothbrush comprises a toothbrush head and a handle, wherein the toothbrush head is detachably inserted in a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted in the transmission rod, the free end face of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, and the distance from the groove to the free end face is smaller than the depth 1/3 of the insertion part in which the transmission rod can be inserted.
The present specification also provides an electric toothbrush comprising: the toothbrush comprises a toothbrush head and a handle, wherein the toothbrush head is detachably inserted in a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted in the transmission rod, the free end face of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, and the distance from the groove to the free end face is smaller than the depth 1/4 of the insertion part in which the transmission rod can be inserted.
The present specification also provides an electric toothbrush comprising: the toothbrush comprises a toothbrush head and a handle, wherein the toothbrush head is detachably inserted on a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted on the transmission rod, the free end face of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, and the distance from the groove to the free end face is 1/6 of the depth of the insertion part, which is the insertion part, of the transmission rod.
The present specification also provides an electric toothbrush comprising: the toothbrush comprises a toothbrush head and a handle, wherein the toothbrush head is detachably inserted in a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted in the transmission rod, the free end face of the transmission rod is positioned in the insertion part, and a groove connected with the insertion part is arranged on the transmission rod.
In order to reduce the shearing force applied to the groove on the transmission rod when the electric toothbrush falls, the larger the length difference of the transmission rods on two sides of the groove is, the better the distance between the groove and the end surface of the transmission rod is, but the side surface of the groove can be damaged when the distance between the groove and the end surface of the transmission rod is too close, so that the transmission rod is damaged and cannot be used continuously. In addition, the transmission rod is made of different materials, the shearing strength at the groove on the transmission rod is different, the transmission rod of the electric toothbrush comprises but not limited to stainless steel, cast iron, plastic and the like, and the fracture strength at the groove on the transmission rod is also related to the shape, the depth and the like of the groove. In order to facilitate the insertion of the brush head, the groove of the transmission rod is generally in the shape of a ring formed by surrounding the transmission rod, the ratio of the depth of the annular groove to the minimum diameter of the transmission rod at the groove is less than 1:2, and the transmission rod at the groove is easy to break due to the fact that the depth of the groove is too large. Preferably, when the ratio of the depth of the annular groove to the minimum diameter of the driving rod at the groove is less than 1:2, the distance from the groove to the free end face is 1-5 times the minimum diameter of the driving rod at the groove, and 5 times the minimum diameter of the driving rod at the groove is less than 3/4 the depth of the insertion part where the driving rod can be inserted.
The present specification also provides an electric toothbrush comprising: the toothbrush comprises a toothbrush head and a handle, wherein the toothbrush head is detachably inserted in a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted in the transmission rod, the free end face of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, the groove is in an annular shape formed by surrounding the transmission rod, when the ratio of the depth of the groove to the minimum diameter of the transmission rod at the groove is less than 1:2, the distance from the groove to the free end face is 1.5-3 times of the minimum diameter of the transmission rod at the groove, and 3 times of the minimum diameter of the transmission rod at the groove is less than 3/4 of the depth of the insertion part of the transmission rod.
The specification also provides an electric toothbrush, which comprises a brush head and a handle, wherein the brush head is detachably inserted in the transmission rod of the handle, an insertion part is arranged in the brush head, when the brush head is inserted in the transmission rod, the free end face of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, the groove is in an annular shape formed by surrounding the transmission rod, when the ratio of the depth of the groove to the minimum diameter of the transmission rod at the groove is less than 1:2, the distance from the groove to the free end face is 1-2 times of the minimum diameter of the transmission rod at the groove, and 2 times of the minimum diameter of the transmission rod at the groove is less than 3/4 of the depth of the insertion part where the transmission rod can be inserted.
The present specification also provides an electric toothbrush comprising: the toothbrush comprises a toothbrush head and a handle, and is characterized in that the toothbrush head is detachably inserted on a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted on the transmission rod, the free end face of the transmission rod is positioned inside the insertion part, a groove connected with the insertion part is arranged on the transmission rod, an elastic part connected with the transmission rod is arranged on the insertion part, a bulge corresponding to the groove is arranged on the elastic part, and a hole opposite to the elastic part is arranged on the insertion part.
Because the shape and the depth of the groove and the material of the transmission rod are different, the stress which can be borne by the transmission rod part at the groove is different, when the electric toothbrush is vibrated by external force or falls down from a high position, in order to reduce the stress borne by the groove on the transmission rod and ensure that the transmission rod and the toothbrush head do not slide along the axial large displacement during high-speed vibration, the distance from the groove to the free end surface is 1-15 times of the depth of the groove, and the depth of the groove is 15 times less than the depth 3/4 which can be inserted into the insertion part by the transmission rod.
The present specification also provides an electric toothbrush comprising: the toothbrush comprises a toothbrush head and a handle, and is characterized in that the toothbrush head is detachably inserted on a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted on the transmission rod, the free end face of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, an elastic part connected with the transmission rod is arranged on the insertion part, a protrusion corresponding to the groove is arranged on the elastic part, and an opening opposite to the elastic part is arranged on the insertion part.
Because the shape and the depth of the groove and the material of the transmission rod are different, the stress which can be borne by the transmission rod part at the groove is different, when the electric toothbrush is vibrated by external force or falls down from a high position, in order to reduce the stress borne by the groove on the transmission rod and ensure that the transmission rod and the toothbrush head do not slide along the axial large displacement during high-speed vibration, the distance from the groove to the free end surface is 2-7 times of the depth of the groove, and the 7 times of the depth of the groove is less than 3/4 which can be inserted into the depth of the insertion part of the transmission rod.
The present specification also provides an electric toothbrush comprising: the method comprises the following steps: the toothbrush is characterized in that the toothbrush head is detachably inserted on a transmission rod of the handle, an insertion part is arranged in the toothbrush head, when the toothbrush head is inserted on the transmission rod, a free end face 6 of the transmission rod is positioned in the insertion part, a groove connected with the insertion part is arranged on the transmission rod, an elastic part connected with the transmission rod is arranged on the insertion part, a bulge corresponding to the groove is arranged on the elastic part, and a hole opposite to the elastic part is arranged on the insertion part.
Because the shape and the depth of the groove and the material of the transmission rod are different, the stress which can be borne by the transmission rod part at the groove is different, when the electric toothbrush is vibrated by external force or falls down from a high position, in order to reduce the stress borne by the groove on the transmission rod and ensure that the transmission rod and the toothbrush head do not slide along the axial large displacement during high-speed vibration, the distance from the groove to the free end surface is 3-5 times of the depth of the groove, and the 5 times of the depth of the groove is less than 3/4 which can be inserted into the depth of the insertion part of the transmission rod.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (16)
1. A brush head for an electric toothbrush, the electric toothbrush comprising a handle, wherein the brush head is detachably inserted in a transmission rod of the handle, an insertion part is provided in the brush head, and when the brush head is inserted in the transmission rod, a free end surface of the transmission rod is located in the insertion part;
the plug-in part is provided with an elastic piece, the elastic piece is provided with a bulge corresponding to the groove of the transmission rod, and the plug-in part is provided with an opening opposite to the elastic piece.
2. The brush head for an electric toothbrush according to claim 1, wherein a through hole for receiving the elastic member is provided on a side wall of the insertion portion, one end of the elastic member is connected to the side wall of the insertion portion, the protrusion of the elastic member is located inside the insertion portion, and the elastic member has a gap with the insertion portion.
3. A brushhead for an electric toothbrush according to claim 1, wherein the resilient member is integrally formed with the mounting portion or is a metallic member fixedly attached to the mounting portion.
4. The brush head for an electric toothbrush according to claim 1, wherein one end of the insertion portion near the bristles of the brush head is closed, and the elastic member is near the closed end of the insertion portion.
5. The brush head for an electric toothbrush according to claim 1, wherein one end of the elastic member is connected to an end surface of the insertion portion.
6. A head for an electric toothbrush according to claim 1, wherein the elastic member comprises a metal member or a plastic member having a certain elasticity when pressed.
7. A brush head for an electric toothbrush according to any one of claims 1 to 6, wherein the drive rod is provided with a first plane and a second plane extending from a free end face thereof in an axial direction of the drive rod, the first plane and the second plane being disposed opposite to each other;
the plug-in mounting part is provided with a third plane corresponding to the first plane and a fourth plane corresponding to the second plane, the third plane is matched with the first plane, and the fourth plane is matched with the second plane.
8. The brushhead for an electric toothbrush of claim 7, wherein the grooves divide the drive link into a short side and a long side, the short side including a portion of the first plane and a portion of the second plane.
9. A head for an electric toothbrush according to claim 8, wherein the face of said short side adjacent to said first plane and said second plane is connected to said resilient element.
10. The head for an electric toothbrush according to claim 7, wherein the groove divides the driving lever into a short side and a long side, and the first plane and the second plane extending in the axial direction and disposed opposite to each other are provided on the short side and the long side.
11. A head for an electric toothbrush according to claim 7, wherein the head is provided with a bristle surface for implanting bristles, the first and second planes being parallel to the bristle surface.
12. The brushhead for an electric toothbrush of claim 7, wherein the first plane and the second plane differ in length in the axial direction of the drive rod.
13. A brushhead for an electric toothbrush according to claim 12, wherein the first plane which is closer to the bristle face on the brushhead has a greater length in the axial direction of the drive rod than the second plane which is further from the bristle face.
14. A brush head for an electric toothbrush according to any one of claims 1 to 6, wherein the insertion portion is of two separate structural parts from the brush head, the insertion portion being inserted into an internal cavity of the brush head adjacent the end face.
15. A head for an electric toothbrush according to any one of claims 1 to 6, wherein the projections provided on the resilient member corresponding to the recesses have the same shape as the recesses;
along the axial direction of the groove, the cross section of the groove is in a trapezoid shape, a triangle shape or a circular arc shape.
16. An electric toothbrush, comprising:
a handle, and a brush head according to any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210241667.5A CN114652476B (en) | 2019-04-15 | 2019-04-15 | Brush head for electric toothbrush and electric toothbrush with brush head |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910298602.2A CN109846570A (en) | 2019-04-15 | 2019-04-15 | Electric toothbrush |
| CN202210241667.5A CN114652476B (en) | 2019-04-15 | 2019-04-15 | Brush head for electric toothbrush and electric toothbrush with brush head |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910298602.2A Division CN109846570A (en) | 2019-04-15 | 2019-04-15 | Electric toothbrush |
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| Publication Number | Publication Date |
|---|---|
| CN114652476A true CN114652476A (en) | 2022-06-24 |
| CN114652476B CN114652476B (en) | 2024-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210241667.5A Active CN114652476B (en) | 2019-04-15 | 2019-04-15 | Brush head for electric toothbrush and electric toothbrush with brush head |
| CN201910298602.2A Pending CN109846570A (en) | 2019-04-15 | 2019-04-15 | Electric toothbrush |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910298602.2A Pending CN109846570A (en) | 2019-04-15 | 2019-04-15 | Electric toothbrush |
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| CN (2) | CN114652476B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499001Y (en) * | 2000-08-11 | 2002-07-10 | 毅华工程有限公司 | Electric tooth brush |
| CN101557775A (en) * | 2006-12-18 | 2009-10-14 | 布劳恩股份有限公司 | Toothbrush and attachment therefor |
| CN103269654A (en) * | 2010-12-20 | 2013-08-28 | 皇家飞利浦电子股份有限公司 | Brushhead for a power toothbrush with a wedge and spring handle interface |
| CN207041590U (en) * | 2017-02-23 | 2018-02-27 | 深圳市加卓特科技有限公司 | Electric toothbrush head and electric toothbrush |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4642376B2 (en) * | 2004-04-28 | 2011-03-02 | 株式会社泉精器製作所 | Electric toothbrush appliance |
| WO2009077922A1 (en) * | 2007-12-18 | 2009-06-25 | Koninklijke Philips Electronics, N.V. | A brushhead/handle interface for a power toothbrush |
| EP2135580A1 (en) * | 2008-06-20 | 2009-12-23 | Braun Gmbh | Electric toothbrush |
| KR101227742B1 (en) * | 2010-04-23 | 2013-01-29 | 강수철 | Brush head for electric toothbrush |
| CN210019753U (en) * | 2019-04-15 | 2020-02-07 | 广州皓醒湾科技有限公司 | Electric toothbrush |
-
2019
- 2019-04-15 CN CN202210241667.5A patent/CN114652476B/en active Active
- 2019-04-15 CN CN201910298602.2A patent/CN109846570A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499001Y (en) * | 2000-08-11 | 2002-07-10 | 毅华工程有限公司 | Electric tooth brush |
| CN101557775A (en) * | 2006-12-18 | 2009-10-14 | 布劳恩股份有限公司 | Toothbrush and attachment therefor |
| CN103269654A (en) * | 2010-12-20 | 2013-08-28 | 皇家飞利浦电子股份有限公司 | Brushhead for a power toothbrush with a wedge and spring handle interface |
| CN207041590U (en) * | 2017-02-23 | 2018-02-27 | 深圳市加卓特科技有限公司 | Electric toothbrush head and electric toothbrush |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109846570A (en) | 2019-06-07 |
| CN114652476B (en) | 2024-11-01 |
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