New rotating replacement brush head for an electric toothbrush

Abstract

The present invention discloses a novel rotating replacement brush head device for an electric toothbrush, comprising a replacement brush head body (100), the replacement brush head body (100) comprising a brush handle (10) and a brush head, wherein the brush handle (10) has a cavity, the brush head (20) is disposed on top of the cavity (101), the cavity (101) includes a rotating shaft (11); the brush head (20) includes a brush blade assembly (201), the brush blade assembly (201) includes a first boss (202), the first boss (202) includes a pin mounting hole (203). The present invention provides a rotating replacement brush head device for an electric toothbrush with a simple structure, flexible assembly / disassembly, convenient use, improved cleaning effect, and multiple functions. (Figure for abbreviation: Fig. 1)

Description

Title of the invention: New rotating replacement brush head device for an electric toothbrush Technical field

[0001] The present invention relates to the field of electric toothbrush technology, in particular to a novel rotating replacement brush head device for an electric toothbrush. TECHNICAL CONTEXT

[0002] Electric toothbrushes are usually equipped with removable and replaceable brush heads, also called "replacement heads", so that a common handle can be used by several members of the family, and each has its own individual replacement brush head. And when the brush head is worn out and / or needs to be replaced in other words it is not enough to replace the brush head, instead of the entire electric toothbrush, including the handle.

[0003] When brushing, various forces must be transmitted by coupling between the replacement brush head and the handle during the brushing operation. These forces specifically include a cleaning force, a driving force, an axial force and a radial force acting on the replacement brush head and / or the handle. The coupling between the replacement brush head and the handle is often achieved by having the radial force absorbed or dissipated in the handle and the axial force absorbed or dissipated in the drive shaft. This is achieved by pushing a tubular connecting element of the replacement brush head towards a coupling rod or the neck of the toothbrush, and coupling the drive shaft disposed in the brush tube of the replacement brush head to a drive shaft projecting from the end of a coupling rod of the handle.

[0004] The electric toothbrush provides high efficiency, portability and good cleaning effect and is therefore widely used, the existing electric toothbrush mainly works based on the rapid rotation of the motor and therefore drives the brush head to vibrate, thus ensuring a good cleaning effect. The existing electric toothbrush has a complex internal structure, too many parts to be assembled cause corresponding costs in production and a high damage rate of the entire toothbrush; in addition, the high-speed rotation of the motor drives the brush head to vibrate through a transmission component, and instability of the internal structure is likely to cause structural damage, which affects the normal use of the electric toothbrush, thus causing poor cleaning of the teeth.

[0005] At present, for electric toothbrushes on the market, the brush head device is difficult to disassemble and replace flexibly, and it is inflexible and inconvenient to replace the brush head part. Therefore, consumers need an electric toothbrush that is more convenient to use, more flexible to assemble and disassemble, and provides a better tooth cleaning effect. DISCLOSURE OF THE INVENTION

[0006] The main object of the present invention is to provide a novel rotating replacement brush head device for an electric toothbrush with a simple structure, flexible assembly / disassembly, convenient use, better cleaning effect and multiple functions.

[0007] For the above purpose, the present invention provides a novel rotary replacement brush head device for an electric toothbrush, comprising a replacement brush head body, wherein the replacement brush head body comprises a brush handle and a brush head, the brush handle comprises a cavity, the brush head is disposed at the top of the cavity, the cavity comprises a rotary shaft; the brush head comprises a brush blade assembly, the brush blade assembly has a shape corresponding to a shape of the brush head, the brush blade assembly comprises a first boss, the first boss comprises a pin mounting hole, the brush blade assembly comprises a pin, the pin fits without clearance to the pin mounting hole; the edge of the upper portion of the first boss is provided with a brush blade limiting bone, and the lower portion of the first boss is provided with a driven gear;

[0008] The upper portion of the rotating shaft comprises a drive gear, and the drive gear is meshed and transmission connected with the driven gear.

[0009] Optionally, the brush blade assembly includes a positioning bearing, and the first boss is disposed on the positioning bearing.

[0010] Optionally, the brush blade assembly includes an upper brush blade cover and a lower brush blade cover; the upper brush blade cover includes bristle pores and the lower brush blade cover includes a glue overflow groove.

[0011] Optionally, the driving gear respectively comprises a first tooth column and a second tooth column at the upper part of the rotating shaft, and a tooth groove is provided between the first tooth column and the second tooth column; and the driven gear is meshed with the rotating shaft via the tooth groove.

[0012] Optionally, the upper part of the rotating shaft comprises a fulcrum of rotation, and the rotation fulcrum is arranged at the lower part of the drive gear.

[0013] Optionally, the upper portion of the rotating shaft comprises a fulcrum hole, and the rotation fulcrum is disposed inside the fulcrum hole.

[0014] Optionally, the rotating shaft comprises an elastic blade below it, and the elastic blade is provided with a concave elastic blade point.

[0015] Optionally, the rotating shaft comprises, at the central position of the lower part, an axle hole for mounting an axle of the main motor of the electric toothbrush.

[0016] Optionally, a first limiting bone and a second limiting bone are provided respectively on either side of the lower part of the rotating shaft.

[0017] Optionally, the upper portion of the brush handle comprises a cavity, a second boss is disposed within the cavity, and the second boss comprises a pin-through hole; the upper portion of the cavity is provided with a third limiting bone and a fourth limiting bone respectively, and the brush blade limiting bone is disposed between the third limiting bone and the fourth limiting bone.

[0018] Optionally, the rear face of the cavity is provided with a groove and the position of the groove corresponds to the position of the second boss.

[0019] Optionally, a first drainage hole and a second drainage hole are provided respectively on either side of the groove.

[0020] Optionally, a first clamping clasp hole and a second clamping clasp hole are provided respectively at the lower part of the brush handle.

[0021] Optionally, the lower end of the brush handle comprises a tail plug, the tail plug is provided with a first limiting position and a second limiting position, the positions of the first limiting position and the second limiting position respectively correspond to the positions of the first limiting bone and the second limiting bone, and the first limiting position and the second limiting position are respectively engaged on the first limiting bone and the second limiting bone.

[0022] Optionally, the tail cap comprises a first elastic blade and a second elastic blade, the first elastic blade and the second elastic blade are engaged at the lower end of the brush handle via the first clamping clasp hole and the second clamping clasp hole.

[0023] The present invention has the following technical beneficial effects:

[0024] 1) according to the present invention, the drive gear of the brush handle is meshed with the driven gear of the brush, so that the rotating shaft drives the brush to rotate, which has structural simplicity and reliability. movement relative to the structure adopted in the existing art which provides motive force by means of attraction by a magnet of the main motor shaft;

[0025] 2) according to the present invention, a clearance-free fit between the steel pin in oxidizable and the brush blade assembly allows for firm connection, and the pin fits precisely with the through hole of the brush handle, effectively improving the stability of the rotating movement and reducing the working noise;

[0026] 3) the brush blade assembly of the present invention, with a similar structure to the gear, drives the bristles to perform a movement to clean the teeth, with structural simplicity, movement reliability and good cleaning ability;

[0027] 4) a copper-free hair implantation method used in the present invention can reduce the rust pollution of copper blade due to copper hair planting, which is more conducive to human health. DESCRIPTION OF FIGURES

[0028] The embodiments of the present invention or the existing technical solutions appear more clearly during the detailed description of the figures used in the embodiments and the existing technical solutions. Obviously, the figures below are given only for illustrative and non-limiting purposes, and other figures can be obtained by those skilled in the art without creative work depending on the structures shown in the figures.

[0029] [Fig. 1] is a diagram of the structure according to one embodiment of the new rotating replacement brush head device for an electric toothbrush of the present invention;

[0030] [Fig.2] is another diagram of the structure according to an embodiment of the new rotating replacement brush head device for an electric toothbrush of the present invention;

[0031] [Fig.3] is a diagram of the structure of the rotating shaft according to one embodiment of the novel rotating replacement brush head device for an electric toothbrush of the present invention;

[0032] [Fig.4] is another diagram of the structure of the rotating shaft according to a mode of realization lization of the novel rotating replacement brush head device for an electric toothbrush of the present invention;

[0033] [Fig.5] is a diagram of the structure of the upper brush blade cover of the brush head according to one embodiment of the novel rotating replacement brush head device for an electric toothbrush of the present invention;

[0034] [Fig.6] is a diagram of the structure of the lower brush blade cover of the brush according to an embodiment of the new replacement brush device rotary for an electric toothbrush of the present invention;

[0035] [Fig.7] is a diagram of the structure of the brush blade assembly of the brush head according to one embodiment of the novel rotating replacement brush head device for an electric toothbrush of the present invention;

[0036] [Fig-8] is a diagram of the structure of the brush handle according to one embodiment of the novel rotating replacement brush head device for an electric toothbrush of the present invention;

[0037] [Fig.9] is another diagram of the structure of the brush handle according to one embodiment of the novel rotating replacement brush head device for an electric toothbrush of the present invention;

[0038] [Fig. 10] is a diagram of the structure of the tail cap according to one embodiment of the novel rotating replacement brush device for an electric toothbrush of the present invention;

[0039] [Fig. 11] is a diagram of the structure of the brush handle according to one embodiment of the novel rotating replacement brush head device for an electric toothbrush of the present invention;

[0040] [Fig. 12] is another diagram of the structure of the brush handle according to one embodiment of the novel rotating replacement brush head device for an electric toothbrush of the present invention.

[0041] The implementation, functional properties and advantages of the present invention will be described in more detail below through the embodiments with reference to the figures. DETAILED DESCRIPTION OF THE INVENTION

[0042] The technical solutions of the embodiments of the present invention will be described clearly and completely through the following description with reference to the figures, in which said embodiments are only part of the embodiments instead of all embodiments. Other embodiments obtained by those skilled in the art without creative work based on the embodiments of the present invention should be included within the scope of protection of the present invention.

[0043] It is noted that, in the embodiments of the present invention, the direction indicating terms such as "upper", "lower", "left", "right", "front" and "rear" are only for explaining a relative positional relationship between the components under a particular attitude (as shown in the figures), movements or the like, if the specific attitude changes, the direction indicating terms also change accordingly.

[0044] In the present invention, unless otherwise clearly indicated or specified, the The terms "connection", "fixing" or the like shall be understood in their broad senses, for example, it may be a fixed connection or a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection via an intermediate means, and it may be an internal communication between two components and an interaction relationship of two components, unless otherwise clearly specified. For those skilled in the art, the above terms may be understood according to the specific situations in the embodiments of the present invention.

[0045] Furthermore, when the embodiments of the present invention relate to terms such as "first" and "second", the terms "first" and "second" are illustrative, and cannot be considered to indicate or imply a relative degree of importance or number of indicated technical feature. Thus, features with the words "first" or "second" can be considered to indicate or imply at least one feature. Furthermore, the meaning of "and / or" appearing in the description includes three parallel solutions, taking "A and / or B" as an example, including a solution A, or a solution B, or both solutions A and B at the same time.Furthermore, the technical solutions of the different embodiments can be combined with each other, but must be based on the possibility of realization by the person skilled in the art, when the combination of technical solutions seems contradictory or impossible to realize, it should be considered that the combination of such technical solutions does not exist, nor is it included in the scope of the protection claimed by the present invention.

[0046] The present invention provides a novel rotating replacement brush head device for an electric toothbrush.

[0047] Example 1

[0048] Referring to Figures 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, in one embodiment of the present invention, the novel rotating replacement brush head device for an electric toothbrush comprises a replacement brush head body 100, which comprises a brush handle 10 and a brush head 20, the brush handle 10 comprises a cavity 101, preferably two ends of the cavity 101 are open

[0049] - the brush 20 is arranged at the top of the cavity, the cavity 101 comprises a shaft rotary 11; the brush 20 comprises a brush blade assembly 201, the brush blade assembly 201 has a shape corresponding to a shape of the brush 20, the brush blade assembly 201 comprises a first boss 202, the first boss 202 comprises a pin mounting hole 203, the brush blade assembly 201 comprises a first boss 202, the first boss 202 comprises a pin mounting hole 203, the brush blade assembly 201 comprises a second boss 202, the second boss 202 ... brush 202 includes a pin 23, the pin 23 fits without play with the pin mounting hole 202; the edge of the upper portion of the first boss 202 is provided with a brush blade limiting bone 204, and the lower portion of the first boss 202 is provided with a driven gear 206;

[0050] - the upper part of the rotating shaft 11 comprises a drive gear 102, and the drive gear 102 is meshed and transmission connected with the driven gear 206.

[0051] In the present embodiment, the replacement brush body 100 comprises a brush blade assembly 201, a rotating shaft 11, a brush handle 10, a brush 20 and a pin 23.

[0052] In the present embodiment, a drive is provided using an external force (a main motor 40 of the electric toothbrush), the rotating shaft 11 drives the brush blade assembly 201 to swing relative to the pin 23 as the center to achieve the cleaning effect on the teeth by the bristles 214.

[0053] The first boss 202 is provided with a driven gear 206 which is assembled and cooperates with the drive gear 102 to the rotating shaft 11, so that the brush blade assembly 201 can be driven by the rotating shaft.

[0054] In the present embodiment, the brush handle 10 has a tubular structure provided with a cavity 101 inside, preferably, both ends of the cavity 101 are open, the inside is used for mounting the rotating shaft 11, a rotating shaft mounting position 12 is provided inside the cavity 101; the rotating shaft 11 extends from its upper part to the rear of the brush head 20, the brush blade assembly 201 is mounted at the opening at the upper end of the brush handle 10, and different from most current methods on the market in which the bristles are implanted using the copper blades, the brush blade assembly 201 of the present invention adopts a bristle implantation method without a copper blade, which can avoid the rust of the copper blades which causes pollution, thus reducing bacterial growth with safety and hygiene.

[0055] In the present embodiment, the first boss 202 at the brush blade assembly 201 is provided with a pin mounting hole 203, and the diameter of the pin mounting hole 203 is set to 1.35 mm to fit without clearance with the pin 23. The pin 23 has a diameter of 1.4 mm and has a front section designed as a multi-layer inverted structure, which is tightly fitted with the pin mounting hole 203 to prevent the brush blade assembly 201 from disengaging from the brush handle 10 upon rotation.

[0056] Referring to Figures 8 and 9, in the present embodiment, preferably, the upper portion of the brush handle 10 comprises a cavity 23, a second boss 233 is disposed within the cavity 23 and the second boss 233 comprises a pin passage hole 234; the upper part of the cavity 23 is provided with a third limiting bone 231 and a fourth limiting bone 232 respectively, and the brush blade limiting bone 204 is disposed between the third limiting bone 231 and the fourth limiting bone 232.

[0057] The brush blade limiting bone 204 interacts with the third limiting bone 231 and the fourth limiting bone 232 to limit the rotation angle of the brush blade assembly 201, thereby preventing an excessive rotation angle.

[0058] In the present embodiment, preferably, the rear face of the cavity 23 is provided with a groove 237, preferably, the groove 237 has a circular groove shape and the position of the groove 237 corresponds to the position of the second boss 233.

[0059] In the present embodiment, preferably, a first drainage hole 235 and a second drainage hole 236 are provided respectively on either side of the groove 237.

[0060] In the present embodiment, preferably, a first clamping clasp hole 241 and a second clamping clasp hole 242 are provided respectively at the front face and the rear face of the lower portion of the brush handle 10.

[0061] In the present embodiment, the upper face of the second boss 233 is the mounting end face of the brush blade assembly 201. The second boss 233 is provided with a pin through hole 234 therein for mounting the pin 23, and the diameter of the pin through hole 234 is 1.44 mm to maintain a certain clearance with the pin 23, so that the pin 23 can rotate smoothly in the pin through hole 234.

[0062] Two drainage holes, namely the first drainage hole 235 and the second drainage hole 236 are provided respectively on either side of the rear face of the second boss 233 of the brush handle 10, which allows the mouth rinsing water to be drained from these two holes when brushing the teeth, in order to avoid the accumulation of water inside the brush head 20 causing health problems.

[0063] A groove 237 is provided at the rear face of the second boss 233 of the brush handle 10, such groove 237 serves as a mounting position of the pin cap, so that a pin cap corresponding to the pin 23 can be disposed in the groove 237 to prevent excessive contact between the steel cap of the pin 23 and the oral mucosa having an influence during rotation and to maintain the position of the steel pin, thereby preventing the brush blade assembly 201 from sliding forward.

[0064] Referring to Figures 1, 2, 5, 6 and 7, in the present embodiment, preferably, the brush blade assembly 201 comprises a positioning bearing 205, and the first boss 202 is disposed at the positioning bearing 205.

[0065] The positioning bearing 205 can help to achieve automatic assembly of the entire replacement brush body 100 and can also increase the strength of the brush 20.

[0066] In the present embodiment, preferably, the brush blade assembly 201 comprises an upper brush blade cover 21 and a lower brush blade cover 22; the upper brush blade cover 21 comprises bristle pores 212 and the lower brush blade cover 22 comprises a glue overflow groove 222.

[0067] The brush blade assembly 201 comprises a brush blade upper cover 21 and a brush blade lower cover 22; the brush blade upper cover 21 is provided with an upper cover mating face 211, bristle pores 212 and hot melt adhesive nails 213; the front face of the brush blade lower cover 22 is provided with a lower cover mating face 221, a glue overflow groove 222 and an ultrasonic wire 223.

[0068] In the present embodiment, the brush blade upper cover 21 comprises pores 212, the pores 212 are filled with bristles 214, and the bristles 214 and the hot melt adhesive nails 213 are fused with each other by high temperature hot melt method, i.e., copper-free bristle implantation is performed.

[0069] The mating face 211 of the upper brush blade cover 21 fits the mating face 221 of the lower brush blade cover 22, the mating face 221 of the lower brush blade cover 22 is provided with the ultrasonic wire 223, and the upper brush blade cover 21 is fused with the lower brush blade cover 22 by ultrasonic hot melting process, i.e., assembled into a brush 20.

[0070] In the present embodiment, preferably, the mating face 221 of the brush blade lower cover is provided with a glue overflow groove 222 on the inner side, which can effectively prevent an excessively wide gap caused by glue overflow when the brush blade upper cover 21 is fused with the brush blade lower cover 22.

[0071] Referring to Figures 1, 2, 3 and 4, in the present embodiment, preferably, the drive gear 102 comprises a first tooth column 111 and a second tooth column 112, the first tooth column 111 and the second tooth column 112 are arranged at the upper part of the rotating shaft 11, and a tooth groove 113 is arranged between the first tooth column 111 and the second tooth column 112; and the driven gear 206 is meshed with the rotating shaft 11 via the tooth groove 113.

[0072] The first tooth column 111, the second tooth column 112 and the tooth groove 113 form a driving gear 102, and the driving gear 102 is assembled and cooperates with the driven gear 206, so that the brush blade assembly 201 can be driven by the rotating shaft.

[0073] Referring to Figures 1, 2, 3 and 4, in the present embodiment, preferably, the upper portion of the rotary shaft comprises a rotation fulcrum 114, and the rotation fulcrum 114 is disposed at the lower portion of the drive gear 102.

[0074] In the present embodiment, preferably, the upper portion of the rotating shaft 11 comprises a fulcrum hole 16, and the rotation fulcrum 114 is disposed inside the fulcrum hole 16.

[0075] The rotation fulcrum 114 is arranged at the lower part of the drive gear 102, after being mounted, the rotation fulcrum 114 enters the fulcrum hole 16 of the brush handle 10, and the rotation fulcrum 114 serves as a central axis fulcrum when rotating the rotary shaft 11. It plays a role as a central axis of the rotary shaft.

[0076] Referring to Figures 1, 2, 3, 4, 11 and 12, in the present embodiment, preferably, the rotating shaft 11 is provided with an elastic blade 115 below it, and an elastic blade concave point 1151 is provided on the elastic blade.

[0077] The rotating shaft 11 is provided with an elastic blade 115 below it, and an elastic blade concave point 1151 is provided on the elastic blade 115, when in use, a main motor 40 is provided according to the present invention, the main motor 40 comprises a spindle shaft 41, the spindle shaft 41 comprises a shaft flat position 42 and a shaft clamping position 43; the elastic blade concave point 1151, when mounted, enters the shaft clamping position 43 to the main motor 40 and plays a role of a clamping clasp to prevent the spindle shaft 4L from being released.

[0078] In the present embodiment, preferably, the rotating shaft 11 comprises, at the central position of the lower part, an axis hole 117 of the spindle axis 41 for mounting a main motor 40 of the electric toothbrush.

[0079] The center of the rotating shaft 11 is an axle mounting hole 117 and is for mounting the spindle shaft 41 of the main motor 40, and the front section of the axle mounting hole 117 is an assembly flat position 116 and is in contact with the axle flat position 42, the two flat positions press against each other tightly to prevent relative rotation between the parts, thereby effectively transmitting torque and force.

[0080] In the present embodiment, preferably, a first limiting bone 1181 and a second limiting bone 1182 are provided respectively on either side of the lower portion of the rotating shaft 11.

[0081] Two limiting bones, namely the first limiting bone 1181 and the second limiting bone 1182 are located at the tail of the rotating shaft 11, and the first limiting bone 1181 and the second limiting bone 1182 act with the limiting position at the tail cap. They limit the rotation angle of the rotating shaft 11.

[0082] Referring to Figures 1, 2, 3, 4, 8, 9 and 10, in the present embodiment, preferably, the lower end of the brush handle 10 comprises a tail cap 30, the tail cap 30 is provided with a first limiting position 33 and a second limiting position 34, the first limiting position 33 and the second limiting position 34 respectively correspond to the positions of the first limiting bone 1181 and the second limiting bone 1181, and the first limiting position 33 and the second limiting position 34 are respectively engaged on the first limiting bone 1181 and the second limiting bone 1182.

[0083] In the present embodiment, further and preferably, the tail plug 30 comprises a first elastic blade 31 and a second elastic blade 32, the first elastic blade 31 and the second elastic blade 32 are engaged at the lower end of the brush handle 10 via the first clamping clasp hole 241 and the second clamping clasp hole 242.

[0084] Referring to Figures 1, 8, 9, 10, 11 and 12, in the present embodiment, the tail plug 30 is mounted in a tail plug mounting position 13, and is mounted and positioned by engaging the first elastic blade 31 and the second elastic blade 32 to the first clamping clasp hole 241 and the second clamping clasp hole 242 of the brush handle 10, respectively.

[0085] The cavity 101 of the brush handle 10 is provided with a main motor mounting position 15, and a main motor shaft through-hole 14 passes through the center of the interior of the cavity 101 to allow the spindle shaft 41 to pass therethrough.

[0086] Referring to [Fig.3], the lower end of the rotating shaft 11 further comprises the assembly flat position 116 and the shaft mounting hole 117, when mounting the replacement brush, the main motor 40 enters the main motor mounting position 15, the spindle shaft 41 enters the shaft mounting hole 117 of the rotating shaft 11 and the main motor shaft flat position 42 presses against the assembly flat position 116.

[0087] When the main motor 40 is working, the spindle shaft 41 reciprocates and drives the rotating shaft 11 to reciprocate, the drive gear 102 of the rotating shaft 11 drives the brush blade assembly 201 to reciprocate, and the bristles 214 on the brush blade reciprocate to clean the teeth.

[0088] The replacement brush head device for an electric toothbrush of the present invention optimizes the existing design, and has a more structure simpler, simpler assembly, better transmission efficiency and better cleaning effect.

[0089] The above embodiments are only possible embodiments of the present invention, instead of embodiments for limiting the scope of protection of the present invention, and any equivalent structural modifications according to the description and figures of the present invention or direct or indirect applications in the relative technical fields should be included within the scope of protection of the present invention.

Claims

Claims

1. A novel rotating replacement brush head device for an electric toothbrush, comprising a replacement brush head body (100), the replacement brush head body (100) comprising a brush handle (10) and a brush head (20), characterized in that, the brush handle (10) comprises a cavity (101), the brush head (20) is arranged at the top of the cavity (101), the cavity (101) comprises a rotating shaft (11); the brush (20) comprises a brush blade assembly (201), the brush blade assembly (201) has a shape corresponding to a shape of the brush, the brush blade assembly (201) comprises a first boss, the first boss (202) comprises a pin mounting hole (203), the brush blade assembly (201) comprises a pin (23), the pin (23) fits without clearance with the pin mounting hole (203);the edge of the upper part of the first boss (202) is provided with a brush blade limiting bone (204), and the lower part of the first boss (202) is provided with a driven gear (206); the upper part of the rotating shaft (11) comprises a driving gear (102), and the driving gear (102) is meshed and connected by transmission with the driven gear (206).;

2. A novel rotating replacement brush head device for an electric toothbrush according to claim 1, characterized in that the brush blade assembly (201) comprises a positioning bearing (205), and the first boss (202) is arranged on the positioning bearing (205).

3. A novel rotating replacement brush head device for an electric toothbrush according to claim 2, characterized in that, the brush blade assembly (201) comprises an upper brush blade cover (21) and a lower brush blade cover (22); the upper brush blade cover (21) comprises bristle pores (212) and the lower brush blade cover (22) comprises a glue (222) overflow groove (237).

4. A novel rotating replacement brush device for an electric toothbrush according to claim 1, characterized in that the drive gear (102) respectively comprises a first tooth column (111) and a second tooth column (112) at the upper part of the rotating shaft (11), and a tooth groove (113) is disposed between the first tooth column (111) and the second tooth column (112); and the driven gear (206) is meshed with the rotating shaft (11) via the tooth groove (113).

5. A novel rotating replacement brush device for an electric toothbrush according to claim 4, characterized in that the upper portion of the rotating shaft (11) comprises a rotation fulcrum (114), and the rotation fulcrum (114) is arranged at the lower portion of the drive gear (102).

6. A novel rotating replacement brush device for an electric toothbrush according to claim 4, characterized in that, the upper part of the rotating shaft (11) comprises a fulcrum hole (16), and the rotating fulcrum (114) is arranged inside the fulcrum hole (16).

7. A novel rotating replacement brush device for an electric toothbrush according to claim 1, characterized in that, the rotating shaft (11) comprises an elastic blade (115) below it, and the elastic blade (115) is provided with an elastic blade concave point (1151).

8. A novel rotating replacement brush device for an electric toothbrush according to claim 1, characterized in that the rotating shaft (11) comprises, at the central position of the lower part, an axle hole (117) for mounting an axle of the main motor of the electric toothbrush.

9. A novel rotating replacement brush device for an electric toothbrush according to claim 1, characterized in that a first limiting bone (1181) and a second limiting bone (1182) are provided respectively on either side of the lower part of the rotating shaft (11).

10. A novel rotating replacement brush head device for an electric toothbrush according to claim 9, characterized in that, the upper part of the brush handle (101) comprises a cavity (101), a second boss (233) is disposed inside the cavity (101), and the second boss (233) comprises a pin-through hole (234); the upper part of the cavity (101) is provided with a third limiting bone (231) and a fourth limiting bone (232) respectively, and the brush blade limiting bone (204) is disposed between the third limiting bone (231) and the fourth limiting bone (232).

11. A novel rotating replacement brush device for an electric toothbrush according to claim 10, characterized in that the rear face of the cavity (101) is provided with a groove (237) and the position of the groove (237) corresponds to the position of the second boss (233).

12. A novel rotating replacement brush device for an electric toothbrush according to claim 11, characterized in that a first drainage hole (235) and a second drainage hole (236) are provided respectively on either side of the groove (237).

13. A novel rotating replacement brush head device for an electric toothbrush according to claim 12, characterized in that a first clamping clasp hole (241) and a second clamping clasp hole (242) are provided respectively at the lower part of the brush handle (10).

14. A novel rotating replacement brush head device for an electric toothbrush according to claim 13, characterized in that, the lower end of the brush handle (10) comprises a tail cap (30), the tail cap (30) is provided with a first limiting position (33) and a second limiting position (34), the positions of the first limiting position (33) and the second limiting position (34) respectively correspond to the positions of the first limiting bone (1181) and the second limiting bone (1182), and the first limiting position (33) and the second limiting position (34) are respectively engaged on the first limiting bone (1181) and the second limiting bone (1182).

15. A novel rotating replacement brush head device for an electric toothbrush according to claim 14, characterized in that, the tail cap (30) comprises a first elastic blade (31) and a second elastic blade (32), the first elastic blade (31) and the second elastic blade (32) are engaged at the lower end of the brush handle (10) via the first clamping clasp hole (241) and the second clamping clasp hole (242).

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