Electric toothbrush

Abstract

The electric toothbrush comprises a main machine body and a brush head, the main machine body is provided with a driver, the brush head is connected to the upper side of the main machine body, the brush head is provided with a first containing cavity with an opening in the front side, brush bodies are rotationally connected to the brush head, the brush bodies are partially located in the first containing cavity and partially protrude outwards relative to the opening of the first containing cavity, and the number of the brush bodies is two. The two brush bodies are distributed in the left-right direction, the rotating axes of the two brush bodies are parallel, the main machine body or the brush head is provided with a gear transmission structure, the driver can drive the two brush bodies to rotate through the gear transmission structure, and the rotating directions of the two brush bodies are opposite. The portions, protruding outwards relative to the opening of the first containing cavity, of the brush bodies rotate from the position between the two brush bodies to enter the first containing cavity. According to the utility model, the two brush bodies can be used for respectively cleaning the teeth in the upper row and the lower row in the direction from the roots to the ends of the teeth, so that food residues remained in gaps between the teeth can be brushed away favorably, and gingiva can be protected favorably.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning devices, in particular to an electric toothbrush. Background Art

[0002] In daily life, people usually clean their teeth by brushing. Brushing teeth mainly cleans the enamel on the surface of teeth and the gaps between teeth. For cleaning the gaps between teeth and the roots of teeth, the preferred cleaning method is to clean from the roots of teeth to the ends of teeth, which is conducive to brushing away food residues in the gaps and protecting gums. Some people use electric toothbrushes when brushing their teeth, but most existing electric toothbrushes clean by vibration or rotation. The movement of the brush body cannot well meet the need for cleaning from the roots of teeth to the ends of teeth, and the structure needs to be improved. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an electric toothbrush, which can drive two brush bodies to rotate towards each other in preset rotation directions, so that the two brush bodies can clean the upper and lower teeth from the root to the end of the teeth, which is conducive to brushing away food residues remaining in the gaps between teeth and protecting gums.

[0004] According to the electric toothbrush described in the embodiment of the utility model, it includes a main body and a brush head, the main body is provided with a driver, the brush head is connected to the upper side of the main body, the brush head is provided with a first cavity with a front opening, the brush body is rotatably connected to the brush head, the brush body is partially located in the first cavity and partially protrudes outward relative to the opening of the first cavity, the brush body is provided with two, the two brush bodies are distributed in the left and right directions and the rotation axes are parallel to each other, the main body or the brush head is provided with a gear transmission structure, the driver can drive the two brush bodies to rotate through the gear transmission structure, and the rotation directions of the two brush bodies are opposite, so that the part of the brush body protruding outward relative to the opening of the first cavity rotates from the position between the two brush bodies into the first cavity.

[0005] The electric toothbrush according to the embodiment of the utility model has at least the following beneficial effects: when in use, the driver is started, and the driver drives the two brush bodies to rotate in opposite directions, and the brush head part is placed in the oral cavity, and the part of the brush body protruding outward from the first cavity is facing the teeth, and the two brush bodies are parallel to the upper and lower rows of teeth. Since the part of the brush body protruding outward from the first cavity rotates from the position between the two brush bodies into the first cavity, the parts of the two brush bodies used for cleaning the teeth rotate towards each other, so that the upper and lower rows of teeth can be cleaned respectively from the root of the teeth to the end, which is beneficial to brush away food residues remaining in the gaps between the teeth, protect the gums, and is easy to use.

[0006] According to some embodiments of the utility model, the gear transmission structure includes a first transmission gear, a second transmission gear and a driven gear, the brush head is rotatably provided with a first transmission shaft, the driver can be connected to the first transmission shaft in transmission to drive the first transmission shaft to rotate, the first transmission gear and the second transmission gear are distributed in the left and right directions, the driven gear is provided with two and are respectively connected to the two brush bodies, the first transmission gear is meshed with the second transmission gear for transmission, the two driven gears are respectively meshed with the first transmission gear and the second transmission gear for transmission, and the first transmission shaft can drive the first transmission gear or the second transmission gear to rotate.

[0007] According to some embodiments of the present invention, the brush head is detachably connected to the main body.

[0008] According to some embodiments of the utility model, a cleaning chamber is detachably connected to the main body, a second cavity for containing fluid is provided in the cleaning chamber, the main body is provided with a pump body, and the brush head is provided with a delivery channel connected to the first cavity, and the pump body can pump the fluid in the second cavity to the delivery channel and output it to the first cavity through the delivery channel.

[0009] According to some embodiments of the utility model, a mounting groove is provided on the main body, and the rear side and the lower side of the mounting groove are both open structures. The upper groove wall of the mounting groove is provided with a first joint connected to the pump body, and a cover is provided on the cleaning chamber. The upper side of the second cavity is provided with an opening for fluid to enter. The cover is detachably arranged at the opening of the second cavity and can close the opening of the second cavity. The cleaning chamber can be slid into the mounting groove. When the cleaning chamber is installed in the mounting groove, the first joint is plugged into the cover and the fluid in the second cavity can enter the first joint.

[0010] According to some embodiments of the utility model, the side of the cleaning chamber is provided with a limiting rib, and the side groove wall of the installation groove is correspondingly provided with a limiting groove, the cover and the limiting rib are respectively located at the upper and lower ends of the cleaning chamber, and when the cleaning chamber is slid into the installation groove, the limiting rib is inserted into the limiting groove.

[0011] According to some embodiments of the utility model, a first magnetic fitting part is provided at the first joint, and a second magnetic fitting part is provided on the cover. When the first joint is inserted and matched with the cover, the first magnetic fitting part and the second magnetic fitting part are magnetically attracted and matched.

[0012] According to some embodiments of the utility model, a locking plate is slidably connected to the lower end of the main body, and the locking plate can move to the lower opening of the installation groove or move away from the lower opening of the installation groove to correspondingly restrict the cleaning room from leaving the installation groove or release the restriction.

[0013] According to some embodiments of the utility model, limiting members are provided on both sides of the locking piece, the locking piece is clamped between the two limiting members and can move relative to the limiting members, one of the limiting member and the locking piece has an upper limiting convex portion, and the other is correspondingly provided with a limiting concave portion, the locking piece can move relative to the limiting member until the limiting convex portion is inserted into the limiting concave portion or leaves the limiting concave portion, and when the limiting convex portion is inserted into the limiting concave portion, it can limit the movement of the locking piece relative to the limiting member.

[0014] According to some embodiments of the utility model, a movable partition is provided in the second cavity, and the partition can separate the second cavity into a fluid cavity and a normal pressure cavity. A normal pressure hole connected to the normal pressure cavity is provided on the cleaning chamber, so that the normal pressure cavity can be connected to the external atmosphere through the normal pressure hole.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the structure of an electric toothbrush according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the electric toothbrush;

[0019] Figure 3 for Figure 2A magnified schematic diagram of part A;

[0020] Figure 4 for Figure 2 A schematic diagram of the partial structure of the middle brush head;

[0021] Figure 5 for Figure 1 One of the cross-sectional structural diagrams of the electric toothbrush;

[0022] Figure 6 for Figure 5 A schematic cross-sectional view of a portion of the structure of the electric toothbrush in another state;

[0023] Figure 7 for Figure 1 The second schematic diagram of the cross-sectional structure of the electric toothbrush;

[0024] Figure 8 for Figure 1 The third schematic diagram of the cross-sectional structure of the electric toothbrush.

[0025] Reference numerals:

[0026] Main body 100, third cavity 101, mounting groove 102, limiting groove 103, sliding groove 104, avoidance hole 105, driver 110, second transmission shaft 111, pump body 120, first joint 121, second joint 122, first magnetic fitting member 130, locking piece 140, limiting protrusion 141, sliding part 142, limiting member 150, limiting concave part 151, battery 160;

[0027] The brush head 200, the first cavity 201, the delivery channel 202, the brush body 210, the driven gear 211, the first transmission shaft 220, the driving gear 221, the first transmission gear 230, and the second transmission gear 240;

[0028] The cleaning chamber 300 , the second containing cavity 301 , the fluid cavity 302 , the normal pressure cavity 303 , the normal pressure hole 304 , the cover 310 , the second magnetic fitting part 311 , the limiting ribs 320 , and the partition 330 . DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that if it involves orientation descriptions, the orientations or positional relationships indicated, such as up, down, front, back, left, right, etc., are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, if the words "some", "greater than", "less than", "exceed", "over", "under", "within" etc. appear, among which "some" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number, and "over", "under", "within" etc. are understood to include the number.

[0032] If the first and second are described, they are only used to distinguish the technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Reference Figure 1 and Figure 5 , an electric toothbrush, comprising a main body 100 and a brush head 200, the main body 100 is provided with a driver 110, the brush head 200 is connected to the upper side of the main body 100, the brush head 200 is provided with a first cavity 201 with a front opening, a brush body 210 is rotatably connected to the brush head 200, a portion of the brush body 210 is located in the first cavity 201 and a portion of the brush body 210 protrudes outward relative to the opening of the first cavity 201, two brush bodies 210 are provided, the two brush bodies 210 are distributed and arranged in the left and right directions and the rotation axes are parallel to each other, the main body 100 or the brush head 200 is provided with a gear transmission structure, the driver 110 can drive the two brush bodies 210 to rotate through the gear transmission structure and the rotation directions of the two brush bodies 210 are opposite, so that the part of the brush body 210 protruding outward relative to the opening of the first cavity 201 rotates from the position between the two brush bodies 210 into the first cavity 201.

[0035] It is understandable that if Figure 1 and Figure 5As shown, the main body 100 is provided with a third cavity 101 , the driver 110 is provided in the third cavity 101 , and a battery 160 is also provided in the third cavity 101 . The battery 160 is electrically connected to the driver 110 to supply power to the driver 110 . When in use, the driver 110 is started, and the driver 110 drives the two brush bodies 210 to rotate in opposite directions. The electric toothbrush is placed horizontally and the brush head 200 is partially placed in the oral cavity. The part of the brush body 210 that protrudes outward from the first cavity 201 is facing the teeth for cleaning the teeth. The two brush bodies 210 are parallel to the upper and lower rows of teeth. Since the part of the brush body 210 that protrudes outward from the first cavity 201 rotates from the position between the two brush bodies 210 to enter the first cavity 201, the parts of the two brush bodies 210 that are used to clean the teeth rotate towards each other, and the upper and lower rows of teeth can be cleaned from the root of the teeth to the end. With this design, no matter the brush body 210 is placed on the outer surface or the inner surface of the teeth, or the teeth are sandwiched between the two brush bodies 210, the brush body 210 cleans the teeth from the root of the teeth to the end, which is beneficial to brush away food residues remaining in the gaps between the teeth, protects the gums, and is easy to use.

[0036] In actual application, the main body 100 may be provided with a charging interface or an infinite charging module electrically connected to the battery 160 to charge the battery 160, or the battery 160 may be detachable to achieve the replaceability of the battery 160. The specific structure of the main body 100 and the brush head 200 can be set according to actual use needs. It will not be described in detail here and will be explained in detail below.

[0037] In some embodiments, the gear transmission structure includes a first transmission gear 230, a second transmission gear 240 and a driven gear 211. The brush head 200 is rotatably provided with a first transmission shaft 220. The driver 110 can be connected to the first transmission shaft 220 for driving the first transmission shaft 220 to rotate. The first transmission gear 230 and the second transmission gear 240 are distributed along the left and right directions. There are two driven gears 211 and they are respectively connected to the two brush bodies 210. The first transmission gear 230 is meshed with the second transmission gear 240 for transmission. The two driven gears 211 are respectively meshed with the first transmission gear 230 and the second transmission gear 240 for transmission. The first transmission shaft 220 can drive the first transmission gear 230 or the second transmission gear 240 to rotate.

[0038] It is understandable that if Figure 2 , Figure 4 and Figure 5As shown, the end of the first transmission shaft 220 is connected to a driving gear 221, and the first transmission gear 230 and the second transmission gear 240 are arranged in a left-right direction and meshed with each other. The first transmission gear 230 is a double gear, which meshes with the driving gear 221 for transmission. The two driven gears 211 are respectively connected to the two brush bodies 210 and meshed with the first transmission gear 230 and the second transmission gear 240 for transmission. When in use, the driver 110 drives the first transmission shaft 220 to rotate, and the first transmission shaft 220 drives the first transmission gear 230 to rotate through the driving gear 221. Since the first transmission gear 230 is meshed with the second transmission gear 240, the first transmission gear 230 drives the second transmission gear 240 to rotate and rotate in the opposite direction. Similarly, the two driven gears 211 are respectively driven by the first transmission gear 230 and the second transmission gear 240 to rotate in the opposite direction, thereby causing the two brush bodies 210 to rotate in the opposite direction. Through the above structure, the two brush bodies 210 can be driven to rotate in opposite directions by a driver 110. Moreover, such a gear transmission design allows the left and right distance between the two brush bodies 210 to be adjusted by the meshing position of the driven gear 211. The size of the driven gear 211 can be designed to be smaller, and it is beneficial to place the first transmission shaft 220 on the center line of the brush head 200 for easy use.

[0039] In actual application, in addition to the above structure, the first transmission shaft 220 can also be directly connected to the first transmission gear 230 or the second transmission gear 240 to drive them to rotate, or the driven gear 211 can be cancelled, and the two brush bodies 210 are respectively connected to the first transmission gear 230 and the second transmission gear 240, which can be set accordingly according to actual use needs.

[0040] In some embodiments, the brush head 200 is detachably connected to the main body 100. Figure 2 , Figure 4 and Figure 5As shown, the main body 100 is provided with a second transmission shaft 111, and the driver 110 is transmission-connected with the second transmission shaft 111 to drive the second transmission shaft 111 to rotate. The brush head 200 and the main body 100 are detachable. When the brush head 200 and the main body 100 are assembled together, the second transmission shaft 111 and the first transmission shaft 220 are plugged and matched, so that the second transmission shaft 111 and the first transmission shaft 220 are linked, thereby driving the two brush bodies 210 to rotate; when the brush head 200 and the main body 100 are disassembled and separated, the second transmission shaft 111 and the first transmission shaft 220 are plugged and separated. Through the above structure, the brush head 200 can be disassembled and replaced relative to the main body 100. When the brush head 200 fails, the brush head 200 can be removed separately for maintenance to avoid damaging the sealing structure of the main body 100. After the brush head 200 is used for a long time, a new brush head 200 can be selected for easy use. In actual application, the brush head 200 and the main body 100 can be detachable through a snap-fit ​​structure or a plug-in structure, etc., which can be set accordingly according to actual use needs.

[0041] Furthermore, a sealing ring (not shown) is provided on the lower end surface of the brush head 200 or the upper end surface of the main body 100. When the brush head 200 and the main body 100 are assembled, the sealing ring seals the gap between the brush head 200 and the main body 100 to reduce the possibility of water entering and facilitate use.

[0042] In some embodiments, a cleaning chamber 300 is detachably connected to the main body 100, and a second cavity 301 for accommodating fluid is provided in the cleaning chamber 300. The main body 100 is provided with a pump body 120, and the brush head 200 is provided with a delivery channel 202 connected to the first cavity 201. The pump body 120 can pump the fluid in the second cavity 301 to the delivery channel 202 and output it to the first cavity 201 through the delivery channel 202.

[0043] It is understandable that if Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the inlet of the delivery channel 202 is arranged at the lower side of the brush head 200, and the outlet thereof is arranged at the first cavity 201 to communicate with the first cavity 201. When in use, the second cavity 301 may be filled with fluids such as toothpaste, water or other cleaning liquids. In this embodiment, toothpaste is taken as an example. Through the pumping of the pump body 120, the toothpaste in the second cavity 301 is pumped to the delivery channel 202 and output to the first cavity 201 through the delivery channel 202, so as to assist the brush body 210 in cleaning the teeth.

[0044] Furthermore, a mounting groove 102 is provided on the main body 100, and the rear side and the lower side of the mounting groove 102 are both open structures. The upper groove wall of the mounting groove 102 is provided with a first joint 121 connected to the pump body 120. A cover 310 is provided on the cleaning chamber 300, and an opening for fluid to enter is provided on the upper side of the second cavity 301. The cover 310 is detachably arranged at the opening of the second cavity 301 and can close the opening of the second cavity 301. The cleaning chamber 300 can be slid into the mounting groove 102. When the cleaning chamber 300 is installed in the mounting groove 102, the first joint 121 is plugged into and matched with the cover 310, and the fluid in the second cavity 301 can enter the first joint 121.

[0045] It is understandable that if Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the mounting groove 102 extends in the up-down direction, and its rear side and lower side are both open structures. The first joint 121 is arranged on the upper groove wall of the mounting groove 102 and is connected to the input end of the pump body 120. The cleaning chamber 300 can be slid into the mounting groove 102 in the up-down direction. When the cleaning chamber 300 is installed in the mounting groove 102, the left and right side walls of the mounting groove 102 limit the left and right position of the cleaning chamber 300. The first joint 121 is inserted and matched with the cover 310 to fix the upper end of the cleaning chamber 300 and limit the cleaning chamber 300 from detaching from the mounting groove 102 in the front-to-back direction. At the same time, the pump body 120 can pump the fluid in the second cavity 301 through the first joint 121. When the toothpaste in the second cavity 301 is used up, the cleaning chamber 300 can be removed from the mounting groove 102, the first joint 121 is separated from the cover 310, and the cover 310 is removed from the opening of the second cavity 301 to enable toothpaste to be filled; after the filling is completed, the cover 310 is installed on the upper part of the cleaning chamber 300 to close the opening of the second cavity 301.

[0046] Similarly, refer to Figure 5 and Figure 6 A second connector 122 is provided on the upper part of the main body 100, and the second connector 122 is connected to the output end of the pump body 120. When the brush head 200 is installed on the main body 100, the second connector 122 is inserted into the delivery channel 202, so that the pump body 120 can pump fluid into the delivery channel 202. At the same time, the cooperation between the brush head 200 and the second connector 122 can also limit the rotation of the brush head 200 relative to the main body 100, thereby achieving a better fixing effect.

[0047] In actual application, the cover 310 can be connected to the upper side of the cleaning chamber 300 through a threaded structure, or can be detachably connected to the cleaning chamber 300 through a snap-fit ​​structure or a screw-lock structure, which can be set accordingly according to actual use needs.

[0048] Furthermore, a limiting rib 320 is provided on the side of the cleaning chamber 300, and a limiting groove 103 is correspondingly provided on the side groove wall of the installation groove 102. The cover 310 and the limiting rib 320 are respectively located at the upper and lower ends of the cleaning chamber 300. When the cleaning chamber 300 is slid into the installation groove 102, the limiting rib 320 is inserted into the limiting groove 103.

[0049] It is understandable that if Figure 2 , Figure 3 and Figure 7 As shown, limiting ribs 320 are provided on the left and right sides of the lower end of the cleaning chamber 300, and limiting grooves 103 are correspondingly provided on the left and right side groove walls of the mounting groove 102. The limiting ribs 320 and the limiting grooves 103 extend in the up and down directions and are adapted to each other. When the cleaning chamber 300 is slid into the mounting groove 102, the limiting ribs 320 are inserted into the limiting grooves 103 to fix the lower end of the cleaning chamber 300. Combined with the cooperation of the cover 310 and the first joint 121, the cleaning chamber 300 can be better fixed to limit its separation from the mounting groove 102, making it easy to use.

[0050] Furthermore, a first magnetic fitting component 130 is provided at the first joint 121, and a second magnetic fitting component 311 is provided on the cover 310. When the first joint 121 and the cover 310 are inserted and matched, the first magnetic fitting component 130 and the second magnetic fitting component 311 are magnetically attracted and matched.

[0051] It is understandable that if Figure 5 and Figure 6 As shown, the first magnetic fitting member 130 is arranged on the upper side wall of the installation groove 102 and is located at the first joint 121, and the second magnetic fitting member 311 is correspondingly arranged on the cover 310. When the cleaning chamber 300 is installed in the installation groove 102, the first magnetic fitting member 130 and the second magnetic fitting member 311 are magnetically matched. Through the above structure, on the first hand, in the process of the cleaning chamber 300 sliding upward to be installed in the installation groove 102, the attraction generated by the magnetic attraction between the first magnetic fitting member 130 and the second magnetic fitting member 311 is conducive to guiding the cleaning chamber 300 0 is slidably installed, which is convenient for the user to install; secondly, the magnetic attraction of the first magnetic fitting part 130 and the second magnetic fitting part 311 is conducive to making the cover 310 fit with the upper side of the installation groove 102, reducing the possibility of gaps caused by its up and down shaking, thereby reducing the possibility of fluid leakage at the first joint 121; thirdly, the magnetic attraction of the first magnetic fitting part 130 and the second magnetic fitting part 311 can limit the downward movement of the cleaning chamber 300 from the installation groove 102, which is conducive to the fixation of the cleaning chamber 300 and is easy to use. In actual application, the first magnetic fitting part 130 and the second magnetic fitting part 311 can be magnetic parts with opposite magnetism, or one of them can be a magnetic part and the other can be a metal part that can be magnetically attracted by the magnetic part, which can be set accordingly according to actual use needs.

[0052] In some embodiments, a locking piece 140 is slidably connected to the lower end of the main body 100, and the locking piece 140 can move to the lower opening of the installation slot 102 or move away from the lower opening of the installation slot 102 to correspondingly restrict the cleaning chamber 300 from leaving the installation slot 102 or release the restriction.

[0053] It is understandable that if Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8 As shown, the locking piece 140 is slidably connected to the lower end of the main body 100 and can move forward and backward relative to the main body 100. When the cleaning chamber 300 is installed in the mounting groove 102, the locking piece 140 can be moved to the lower opening of the mounting groove 102 to block the cleaning chamber 300 from leaving the lower opening of the mounting groove 102, thereby limiting the cleaning chamber 300 from leaving the mounting groove 102; when the cleaning chamber 300 needs to be disassembled, the locking piece 140 can be moved away from the lower opening of the mounting groove 102 to release the blocking of the cleaning chamber 300, refer to Figure 6 , the cleaning chamber 300 is pushed downward to overcome the magnetic attraction between the first magnetic fitting member 130 and the second magnetic fitting member 311, so that the first joint 121 is separated from the cover 310, and the limiting rib 320 is separated from the limiting groove 103, so that the cleaning chamber 300 can be removed from the installation groove 102. The provision of the locking piece 140 is conducive to improving the stability and reliability of the connection of the cleaning chamber 300, and is convenient for use.

[0054] In actual application, in addition to the above structure, a clamping structure may be provided between the side of the cleaning chamber 300 and the side groove wall of the installation groove 102 to achieve the fixation and detachability of the cleaning chamber 300, which may be set accordingly according to actual use needs.

[0055] Specifically, a limiting member 150 is provided on both sides of the locking piece 140. The locking piece 140 is clamped between the two limiting members 150 and can move relative to the limiting members 150. One of the limiting member 150 and the locking piece 140 has an upper limiting protrusion 141, and the other is correspondingly provided with a limiting recess 151. The locking piece 140 can move relative to the limiting member 150 until the limiting protrusion 141 is inserted into the limiting recess 151 or leaves the limiting recess 151. When the limiting protrusion 141 is inserted into the limiting recess 151, it can limit the movement of the locking piece 140 relative to the limiting member 150.

[0056] It is understandable that if Figure 2 , Figure 3 and Figure 8As shown, two stoppers 150 are respectively located on the left and right sides of the locking piece 140, and a slide groove 104 is defined between the stopper 150 and the main body 100. The left and right sides of the locking piece 140 are correspondingly provided with sliding parts 142 that cooperate therewith. Through the cooperation between the sliding parts 142 and the slide groove 104, the locking piece 140 can slide forward and backward and limit its sliding stroke. The left and right sides of the locking piece 140 are provided with stopper convex parts 141, and correspondingly, the side of the stopper 150 is provided with a stopper concave part 151. When the locking piece 140 moves to block the cleaning chamber 300 from leaving the installation groove 102, refer to Figure 8 , the limiting protrusion 141 is inserted into the limiting recess 151. At this time, the engagement of the limiting protrusion 141 and the limiting recess 151 can limit the forward and backward movement of the locking piece 140, so that it is fixed, thereby effectively blocking the cleaning chamber 300 and reducing the possibility of loosening and deviation of the locking piece 140; when the cleaning chamber 300 needs to be disassembled and removed from the installation groove 102, the locking piece 140 can be pushed forward with force to make the limiting protrusion 141 leave the limiting recess 151, thereby facilitating the movement of the locking piece 140.

[0057] In actual application, the limiting protrusion 141 can be made of rubber or silicone material that can be elastically deformed, or the locking member 140 and the limiting member 150 are both made of plastic material, so that they have a certain deformation ability, so that the limiting protrusion 141 can be stuck in or out of the limiting recess 151. In addition to the above structure, the locking piece 140 and the limiting member 150 can also be limited in position by a magnetic structure, such as a magnetic member is provided at a preset position, when the locking piece 140 moves to the preset position, the magnetic member and the magnetic part on the locking piece 140 are magnetically matched, so as to achieve the position limitation of the locking piece 140; an elastic member can also be provided between the locking piece 140 and the limiting member 150, and the elastic force of the elastic member is used to act on the locking piece 140, so that it maintains a state of covering the lower opening of the installation groove 102, so as to limit the separation of the cleaning chamber 300, which can be set accordingly according to actual use needs.

[0058] In some embodiments, a movable partition 330 is provided in the second cavity 301, and the partition 330 can separate the second cavity 301 into a fluid cavity 302 and a normal pressure cavity 303. A normal pressure hole 304 connected to the normal pressure cavity 303 is provided on the cleaning chamber 300, so that the normal pressure cavity 303 can be connected to the external atmosphere through the normal pressure hole 304.

[0059] It is understandable that if Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8As shown, the partition 330 is arranged in the second cavity 301 and can divide the second cavity 301 into a fluid cavity 302 and a normal pressure cavity 303. The fluid cavity 302 is used to fill fluid such as toothpaste. A normal pressure hole 304 is provided at the lower end of the cleaning chamber 300. A corresponding avoidance hole 105 for avoiding the normal pressure hole 304 is provided on the locking piece 140 to avoid blocking the normal pressure hole 304. The normal pressure hole 304 is connected with the normal pressure cavity 303, so that the normal pressure cavity 303 can be connected with the external atmosphere through the normal pressure hole 304. Due to the pump body 120 sucking the toothpaste, the volume of the toothpaste in the fluid cavity 302 is reduced, and the pressure in the fluid cavity 302 is reduced accordingly. At this time, a pressure difference is formed between the normal pressure cavity 303 and the fluid cavity 302. The pressure in the fluid cavity 302 is relatively small, while the pressure in the normal pressure cavity 303 is greater than the pressure in the fluid cavity 302. Therefore, the partition 330 moves upward along the second cavity 301 under the action of the pressure difference, thereby reducing the volume of the fluid cavity 302 and increasing the volume of the normal pressure cavity 303. However, the normal pressure cavity 303 is not as large as the normal pressure cavity 303. 303 is connected to the external atmosphere, so the pressure in the cavity maintains the atmospheric pressure level, and the pressure in the fluid cavity 302 maintains a dynamic balance with the pressure in the normal pressure cavity 303, thereby avoiding deformation of the cleaning chamber 300 due to a large vacuum in the fluid cavity 302, which is beneficial to ensuring the stable connection of the cleaning chamber 300. In addition, such a design reduces the volume of the fluid cavity 302 synchronously when the toothpaste is reduced, so that the toothpaste can keep filling the fluid cavity 302, which is beneficial to ensuring the effective pumping of the toothpaste by the pump body 120.

[0060] In actual application, in addition to the above structure, a one-way valve can be provided on the cleaning chamber 300, and the external atmosphere can enter the second cavity 301 through the one-way valve. At the same time, the fluid in the second cavity 301 cannot flow out through the one-way valve to ensure that the pressure inside the second cavity 301 is normal. The specific setting can be made according to actual use needs.

[0061] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An electric toothbrush, characterized in that: include: A main body, provided with a driver; A brush head is connected to the upper side of the main body, and the brush head is provided with a first cavity with an opening on the front side. A brush body is rotatably connected to the brush head, and a portion of the brush body is located in the first cavity and a portion protrudes outward relative to the opening of the first cavity. Two brush bodies are provided, and the two brush bodies are distributed along the left and right directions and the rotation axes are parallel to each other. The main body or the brush head is provided with a gear transmission structure, and the driver can drive the two brush bodies to rotate through the gear transmission structure, and the rotation directions of the two brush bodies are opposite, so that the portion of the brush body protruding outward relative to the opening of the first cavity rotates from the position between the two brush bodies into the first cavity.

2. The electric toothbrush according to claim 1, characterized in that: The gear transmission structure includes a first transmission gear, a second transmission gear and a driven gear. The brush head is rotatably provided with a first transmission shaft. The driver can be connected to the first transmission shaft to drive the first transmission shaft to rotate. The first transmission gear and the second transmission gear are distributed in the left and right directions. Two driven gears are provided and are respectively connected to the two brush bodies. The first transmission gear is meshed with the second transmission gear for transmission. The two driven gears are respectively meshed with the first transmission gear and the second transmission gear for transmission. The first transmission shaft can drive the first transmission gear or the second transmission gear to rotate.

3. The electric toothbrush according to claim 1, characterized in that: The brush head is detachably connected to the main body.

4. The electric toothbrush according to claim 1, characterized in that: The main body is detachably connected to a cleaning chamber, the cleaning chamber is provided with a second cavity for accommodating fluid, the main body is provided with a pump body, the brush head is provided with a delivery channel connected to the first cavity, and the pump body can pump the fluid in the second cavity to the delivery channel and output it to the first cavity through the delivery channel.

5. The electric toothbrush according to claim 4, characterized in that: The main body is provided with a mounting groove, the rear side and the lower side of the mounting groove are both open structures, the upper groove wall of the mounting groove is provided with a first joint connected to the pump body, the cleaning chamber is provided with a cover, the upper side of the second cavity is provided with an opening for fluid to enter, the cover is detachably arranged at the opening of the second cavity and can close the opening of the second cavity, the cleaning chamber can be slid into the mounting groove, and when the cleaning chamber is installed in the mounting groove, the first joint is plugged into and matched with the cover and the fluid in the second cavity can enter the first joint.

6. The electric toothbrush according to claim 5, characterized in that: The side of the cleaning chamber is provided with a limiting rib, and the side groove wall of the installation groove is correspondingly provided with a limiting groove. The cover and the limiting rib are respectively located at the upper and lower ends of the cleaning chamber. When the cleaning chamber is slid into the installation groove, the limiting rib is inserted into the limiting groove.

7. The electric toothbrush according to claim 5, characterized in that: A first magnetic fitting part is provided at the first joint, and a second magnetic fitting part is provided on the cover. When the first joint is inserted and matched with the cover, the first magnetic fitting part and the second magnetic fitting part are magnetically attracted and matched.

8. The electric toothbrush according to claim 5, characterized in that: The lower end of the main body is slidably connected with a locking piece, and the locking piece can move to the lower opening of the installation slot or move away from the lower opening of the installation slot to correspondingly restrict the clean room from leaving the installation slot or release the restriction.

9. The electric toothbrush according to claim 8, characterized in that: Limiting pieces are provided on both sides of the locking piece, and the locking piece is clamped between the two limiting pieces and can move relative to the limiting pieces. One of the limiting piece and the locking piece has an upper limiting convex portion, and the other is correspondingly provided with a limiting concave portion. The locking piece can move relative to the limiting piece until the limiting convex portion is inserted into the limiting concave portion or leaves the limiting concave portion. When the limiting convex portion is inserted into the limiting concave portion, the locking piece can be restricted from moving relative to the limiting piece.

10. The electric toothbrush according to claim 4, characterized in that: A movable partition is provided in the second cavity, and the partition can separate the second cavity into a fluid cavity and a normal pressure cavity. A normal pressure hole connected to the normal pressure cavity is provided on the clean room, so that the normal pressure cavity can be connected to the external atmosphere through the normal pressure hole.

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