U-shaped electric toothbrush

Abstract

The invention relates to the technical field of electric toothbrushes, and particularly discloses a U-shaped electric toothbrush which comprises a holding part internally provided with a motor and a U-shaped brush head part at the front end. The brush head part is composed of a brush head and a built-in transmission box, grooves with supporting seats are formed in the upper surface and the lower surface of the brush head, and a plurality of sets of T-shaped anti-running terminals capable of rotating independently are installed at the tail ends of the grooves. A transmission rod and a helical gear system are arranged in the transmission box and are connected with eight wire twisting brushes which are arranged in a partitioned manner and are used for respectively cleaning lip sides, tongue sides and chewing surfaces of teeth; the motor drives all the wire twisting brushes to synchronously and directionally rotate in the direction from the gingiva to the dental crown, the stainless steel spring pieces in the limiting channels are combined to lock the brush wires, the gingiva is effectively protected while efficient full-mouth cleaning is achieved, the structure is compact and stable, and operation is reliable.

Description

Technical Field

[0001] This invention relates to the field of electric toothbrush technology, and more specifically, to a U-shaped electric toothbrush. Background Technology

[0002] With increased awareness of oral hygiene and the continuous development of electric toothbrush technology, electric toothbrushes have become an important tool for daily personal care. In recent years, the design of electric toothbrushes has gradually evolved from single-head vibration to multi-head collaboration, intelligence, and user-friendliness. In particular, the U-shaped brush head design, which can clean both upper and lower teeth simultaneously, has emerged, significantly improving brushing efficiency and user experience, representing an important development trend in this field.

[0003] However, most existing U-shaped toothbrushes use one-piece injection-molded silicone bristles and employ ultrasonic vibration to clean teeth. This method has drawbacks such as coarse bristles that cannot reach deep into the gaps between teeth and insufficient foaming of toothpaste, making it difficult to effectively clean the mouth. The up-and-down vibration pattern can also damage the gums, which is detrimental to oral health.

[0004] Therefore, the present invention aims to provide a novel U-shaped electric toothbrush to solve the problems of uncontrollable bristle movement direction, incomplete cleaning, insufficient protection of gums, and poor reliability of transmission system in the prior art, thereby improving the overall brushing experience and oral health level. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a U-shaped electric toothbrush to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A novel toothbrush includes a grip portion, a motor is installed inside the grip portion, a brush head is provided at the front end of the grip portion, the brush head is composed of a brush head and a transmission box, the brush head is "U" shaped, the transmission box is provided inside the brush head, and the output shaft of the motor is connected to the transmission box. The brush head has grooves on both the upper and lower surfaces, and several support seats are symmetrically arranged on the inner edge of the grooves. The brush head has a through groove inside that connects the upper and lower sets of grooves. Several independently rotatable anti-running terminals are inserted and fixed into the slot at the end of the groove. The transmission box is connected to a twisted brush assembly and a transmission rod. One end of the transmission rod is fixedly connected to the output end of the motor. Each support base has a limit channel to restrict the path of the twisted brush. The limit channel is equipped with a spring sheet made of elastic material to install and lock the twisted brush.

[0007] Alternatively, the transmission box includes a housing that is inserted and fixed to the gripping part and the transmission shaft. One end of the transmission shaft is provided with a side drive helical gear, and the other end is provided with a side drive helical gear.

[0008] Multiple options are available. The top and bottom of the side drive helical gear are respectively meshed with a first transmission helical gear and a second transmission helical gear. The top of the first transmission helical gear is meshed with a first working helical gear. The bottom of the second transmission helical gear is meshed with a second working helical gear. The left and right sides of the side drive helical gear are respectively meshed with a third working helical gear and a fourth working helical gear. The driving helical gear is meshed with the helical gears at one end of the first transmission rod and the second transmission rod, respectively. The helical gears at the other ends of the first transmission rod and the second transmission rod are respectively meshed with the fifth working helical gear and the sixth working helical gear. The end faces of all the working helical gears are provided with square holes.

[0009] Alternatively, the twisted brush group consists of eight twisted brushes, including twisted brush No. 1, twisted brush No. 2, twisted brush No. 3, twisted brush No. 4, twisted brush No. 5, twisted brush No. 6, twisted brush No. 7, and twisted brush No. 8. The first to fourth twisted brushes are groups of bristles used on the tooth surfaces of the upper and lower jaws and lips.

[0010] The fifth and sixth twisted brushes are used for cleaning the tooth surfaces on the throat side of the upper and lower jaw teeth. The seventh and eighth twisted brushes are used for cleaning the chewing side of the teeth.

[0011] Multiple choice One end of the first twisted brush is fixedly connected to the square hole shaft at one end of the first working helical gear, and the other end is fixedly connected to the anti-running terminal on the same side. One end of the second twisted brush is fixedly connected to the square hole shaft at the other end of the first working helical gear, and the other end is fixedly connected to the anti-running terminal on the same side. One end of the seventh twisted brush is fixedly connected to the square hole shaft at one end of the second working helical gear, and the other end is fixedly connected to the anti-running terminal on the same side. One end of the eighth twisted brush is fixedly connected to the square hole shaft at the other end of the second working helical gear, and the other end is fixedly connected to the anti-running terminal on the same side. One end of the third twisted brush is fixedly connected to the square hole at one end of the third working helical gear, and the other end is fixedly connected to the anti-running terminal. One end of the fourth twisted brush is fixedly connected to the square hole at the other end of the fourth working helical gear, and the other end is fixedly connected to the anti-running terminal. One end of the fifth twisted brush is fixedly connected to the square hole on the fifth working helical gear, and the other end is fixedly connected to the anti-running terminal at the other end through the support base. One end of the sixth twisted brush is fixedly connected to the square hole on the sixth working helical gear, and the other end is fixedly connected to the anti-running terminal at the other end through a support base.

[0012] Alternatively, the elastic material may be stainless steel.

[0013] Alternatively, the motor inside the grip drives all the twisted brushes in the twisted brush group to rotate in a direction from the gum towards the tooth surface.

[0014] The technical effects and advantages of this invention are as follows: Compared to existing technologies, this invention employs a unique U-shaped brush head structure with grooves and support bases on its upper and lower surfaces, precisely positioning eight independently movable twisted brushes. These twisted brushes are driven by an internal gear transmission system, targeting the labial, lingual, and chewing surfaces of the teeth for directional cleaning. This design allows for simultaneous cleaning of multiple tooth surfaces with a single brush stroke, significantly improving cleaning efficiency and coverage, making it particularly suitable for orthodontic patients or those seeking highly efficient brushing.

[0015] Compared to existing technologies, this invention utilizes a precise helical gear transmission system to ensure that all twisted brushes rotate in a single direction "from the gums toward the crown." This motion mimics the scientific path of the Bass brushing technique, effectively cleaning plaque in the gingival sulcus while avoiding the reverse pulling and damage to gum tissue caused by traditional reciprocating or rotating bristles. This significantly improves comfort and safety during brushing, resulting in better oral hygiene.

[0016] Compared to existing technologies, this invention introduces independently rotatable T-shaped anti-runaway terminals at both ends of the brush head and sets up a limiting channel made of 304 stainless steel spring sheets within the support base. The two ends of the twisted brush are fixed to the drive terminal and the T-shaped terminal respectively, and locked in the middle by the spring sheets, forming a stable three-point support structure. This not only effectively prevents the bristles from falling off or shifting during high-speed rotation, ensuring transmission reliability, but its metallic elastic material also has the advantages of corrosion resistance and long service life.

[0017] Compared to existing technologies, this invention integrates multiple sets of helical gears and transmission rods within a single transmission box, using A and B side partitioned transmission to simultaneously drive eight twisted wire brushes in coordinated motion with a single motor. This design features a compact structure and reasonable power distribution, overcoming the high cost and large size problems of multi-motor solutions, and avoiding the torque deficiency or motion interference issues caused by simple single-motor linkage. It achieves complex and reliable transmission functions within a limited space.

[0018] Compared to existing technologies, all eight twisted bristles in the brush head are replaceable. Compared to existing U-shaped toothbrushes with non-replaceable bristles, such as one-piece silicone bristle brush heads or tufted bristle brush heads, this significantly reduces the user's maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the upper structure of the brush head of the present invention.

[0020] Figure 2 This is a schematic diagram of the lower structure of the brush head of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the transmission box A side of the present invention.

[0022] Figure 4 This is a schematic diagram of the internal structure of the transmission box on side B of the present invention.

[0023] Figure 5 This is a schematic diagram of the gripping part structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the internal structure of the support base of the present invention.

[0025] Figure 7 This is a schematic diagram of the twisted wire brush connection structure at the top of the brush head of the present invention.

[0026] Figure 8 This is a schematic diagram of the twisted wire brush connection structure at the lower part of the brush head of the present invention.

[0027] The attached figures are labeled as follows: 1. Grip; 2. Brush head; 3. Transmission box; 4. Groove; 5. Support base; 6. T-shaped anti-run terminal; 301. Transmission rod; 501. Limiting channel; 7. Spring plate; a301. A-side driving helical gear; b301. B-side driving helical gear; a302. First transmission helical gear; a303. Second transmission helical gear; a304. First working helical gear; a305. Second working helical gear; a. Third working helical gear. Helical gear; a307, fourth working helical gear; b302, first transmission rod; b303, second transmission rod; b304, fifth working helical gear; b305, sixth working helical gear; square hole; 101, first twisted wire brush; 102, second twisted wire brush; 103, third twisted wire brush; 104, fourth twisted wire brush; 105, fifth twisted wire brush; 106, sixth twisted wire brush; 107, seventh twisted wire brush; 108, eighth twisted wire brush. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1 As attached Figures 1-5 The novel U-shaped toothbrush shown includes a grip part 1, a motor installed inside the grip part 1, a brush head at the front end of the grip part 1, the brush head consisting of a brush head 2 and a transmission box 3, the brush head 2 being "U" shaped, the transmission box 3 being installed inside the brush head 2, and the output shaft of the motor being connected to the transmission box 3. The brush head 2 has grooves 4 on both the upper and lower surfaces. Several support seats 5 are symmetrically arranged on the inner edge of the grooves 4. A through groove is opened inside the brush head 2 to connect the upper and lower sets of grooves 4. Several independently rotatable T-shaped anti-running terminals 6 are inserted and fixed in the slot at the end of the groove 4; The transmission box 3 is equipped with a transmission rod 301. One end of the transmission rod 301 is fixedly connected to the output end of the motor. The support base 5 is provided with a limit channel 501 to limit the path of the twisted brush. The limit channel 501 is provided with a spring sheet 7 made of elastic material to install and lock the twisted brush.

[0030] In this embodiment, the transmission box 3 includes a housing that is inserted and fixed to the gripping part 1 and a transmission shaft 301. One end of the transmission shaft 301 is provided with an A-side driving helical gear a301, and the other end is provided with a B-side driving helical gear b301.

[0031] In this embodiment, the top and bottom of the A-side driving helical gear a301 are respectively meshed with the first transmission helical gear a302 and the second transmission helical gear a303. The top of the first transmission helical gear a302 is meshed with the first working helical gear a304, and the bottom of the second transmission helical gear a303 is meshed with the second working helical gear a305. The left and right sides of the A-side driving helical gear a301 are respectively meshed with the third working helical gear a and the fourth working helical gear a307. The drive helical gear b301 is meshed with the helical gears at one end of the first transmission rod b302 and the second transmission rod b303, respectively. The helical gears at the other end of the first transmission rod b302 and the second transmission rod b303 are respectively meshed with the fifth working helical gear b304 and the sixth working helical gear b305. All working helical gears have square holes on their end faces.

[0032] Furthermore, the aforementioned gears together constitute a gear transmission system. In the gear transmission system on side A, the A-side driving helical gear a301 rotates, and the first working helical gear a304 to the fourth working helical gear a307 complete directional rotation. In the gear transmission system on side B, the B-side driving helical gear b301 rotates, and the fifth working helical gear b304 and the sixth working helical gear b305 complete directional rotation.

[0033] In this embodiment, the twisted brush group consists of eight twisted brushes, including twisted brush 101, twisted brush 102, twisted brush 103, twisted brush 104, twisted brush 105, twisted brush 106, twisted brush 107, and twisted brush 108. The first to fourth twisted brushes, 101-104, are bristle sets used on the tooth surface of the upper and lower jaws and lips.

[0034] The fifth twisted brush 105 and the sixth twisted brush 106 are used for cleaning the tooth surface on the throat side of the upper and lower jaw teeth. The seventh twist brush 107 and the eighth twist brush 108 are used for cleaning the chewing side of the teeth.

[0035] Multiple choice One end of the first twisted brush 101 is fixedly connected to the square hole shaft at one end of the first working helical gear a304, and the other end is fixedly connected to the T-shaped anti-run terminal 6 on the same side. One end of the second twisted brush 102 is fixedly connected to the square hole shaft at the other end of the first working helical gear a304, and the other end is fixedly connected to the T-shaped anti-run terminal 6 on the same side. One end of the seventh twist brush 107 is fixedly connected to the square hole shaft at one end of the second working helical gear a307, and the other end is fixedly connected to the T-shaped anti-run terminal 6 on the same side. One end of the eighth twisted brush 108 is fixedly connected to the square hole shaft at the other end of the second working helical gear a306, and the other end is fixedly connected to the T-shaped anti-run terminal 6 on the same side. One end of the third twisted brush 103 is fixedly connected to the square hole at one end of the third working helical gear a305, and the other end is fixedly connected to the T-type anti-run terminal 6. One end of the fourth twisted brush 104 is fixedly connected to the square hole at the other end of the fourth working helical gear a305, and the other end is fixedly connected to the T-type anti-run terminal 6. One end of the fifth twisted brush 105 is fixedly connected to the square hole on the fifth working helical gear b305, and the other end is fixedly connected to the T-shaped anti-run terminal 6 at the other end through the support base 5. One end of the sixth twist brush 106 is fixedly connected to the square hole on the sixth working helical gear b304, and the other end is fixedly connected to the T-shaped anti-run terminal 6 at the other end through the support base 5.

[0036] Furthermore, each twisted brush has one end that drives rotation and the other end that drives rotation. A transmission system consisting of gears and rods enables each twisted brush to rotate in a coordinated manner, thereby performing the brushing operation.

[0037] In this embodiment, the elastic material is 304 stainless steel. Furthermore, the 304 stainless steel material used in the spring sheet 7 has a yield strength of not less than 205MPa, has good elastic recovery characteristics and resistance to corrosion in the oral cavity environment, and ensures a durable and effective locking function.

[0038] In this embodiment, the motor inside the grip 1 drives all the twisted brushes in the twisted brush assembly to rotate in a direction from the gum towards the tooth surface. Furthermore, after being powered on, the motor drives the transmission shaft 301 to rotate at a constant speed in a single direction. Through the transmission system, the movement direction of the brush bristle tips is always from the gum towards the tooth crown, thereby achieving cleaning of the gingival sulcus and avoiding damage to the gingival tissue.

[0039] The workflow of this invention is as follows: After the user starts the electric toothbrush, the motor inside the grip 1 begins to rotate, driving the transmission rod 301 fixedly connected to it to rotate. The drive helical gears a301 on side A and b301 on side B at both ends of the transmission rod 301 rotate synchronously. On side A, the drive helical gear a301 simultaneously meshes with the first transmission helical gear a302 and the second transmission helical gear a303 arranged vertically, as well as the third working helical gear a306 and the fourth working helical gear a307 on the left and right sides, thereby transmitting power to the first working helical gear a304, the second working helical gear a305, and the third and fourth working helical gears, respectively. On side B, the drive helical gear b301 meshes with the helical gears at one end of the first transmission rod b302 and the second transmission rod b303, thereby driving the fifth working helical gear b304 and the sixth working helical gear b305 to rotate. The rotation of all working helical gears causes the eight twisted brushes (twisted brush 101 to twisted brush 108) fixedly connected to them to begin moving. The other end of each twisted brush is fixed in a freely rotatable T-shaped anti-running terminal 6, which is securely locked in the middle by a limiting channel 501 formed by 304 stainless steel spring plates 7 inside the support base 5, forming a stable support. Finally, driven by this precision transmission system, all the twisted brushes rotate synchronously along a scientific direction from the gums towards the crown, thus efficiently, synchronously and gently completing a comprehensive cleaning of all outer surfaces of the teeth.

[0040] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel U-shaped toothbrush, comprising a grip (1), characterized in that: The grip (1) is equipped with a motor. The front end of the grip (1) is provided with a brush head. The brush head is composed of a brush head (2) and a transmission box (3). The brush head (2) is "U" shaped and the transmission box (3) is provided inside it. The output shaft of the motor is connected to the transmission box (3) for transmission. The brush head (2) has grooves (4) on both the upper and lower surfaces. Several support seats (5) are symmetrically arranged on the inner edge of the grooves (4). A through groove is opened inside the brush head (2) to connect the upper and lower sets of grooves (4). Several independently rotatable T-shaped anti-running terminals (6) are inserted and fixed in the slot at the end of the groove (4). The transmission box (3) is connected to a twisted brush assembly and a transmission rod (301). One end of the transmission rod (301) is fixedly connected to the output end of the motor. Each support base (5) has a limit channel (501) to limit the path of the twisted brush. The limit channel (501) is provided with a spring sheet (7) made of elastic material inside to install and lock the twisted brush.

2. The novel U-shaped toothbrush according to claim 1, characterized in that: The transmission box (3) includes a housing that is inserted and fixed to the gripping part (1) and the transmission shaft (301). The transmission shaft (301) has an A-side driving helical gear (a301) on one end surface and a B-side driving helical gear (b301) on the other end.

3. A novel U-shaped toothbrush according to claim 2, characterized in that: The top and bottom of the A-side driving helical gear (a301) are respectively meshed with a first transmission helical gear (a302) and a second transmission helical gear (a303). The top of the first transmission helical gear (a302) is meshed with a first working helical gear (a304), and the bottom of the second transmission helical gear (a303) is meshed with a second working helical gear (a305). The left and right sides of the A-side driving helical gear (a301) are respectively meshed with a third working helical gear (a306) and a fourth working helical gear (a307). The driving helical gear (b301) is meshed with the helical gears at one end of the first transmission rod (b302) and the second transmission rod (b303) respectively. The helical gears at the other end of the first transmission rod (b302) and the second transmission rod (b303) are respectively meshed with the fifth working helical gear (b304) and the sixth working helical gear (b305). All the working helical gears have square holes on their end faces.

4. A novel U-shaped toothbrush according to claim 1, characterized in that: The twisted brush group consists of eight twisted brushes, including twisted brush No. 1 (101), twisted brush No. 2 (102), twisted brush No. 3 (103), twisted brush No. 4 (104), twisted brush No. 5 (105), twisted brush No. 6 (106), twisted brush No. 7 (107), and twisted brush No. 8 (108). The first to fourth twisted brushes (101-104) are bristle groups used on the tooth surface of the upper and lower jaws on the side of the lips.

5. The fifth twisted brush (105) and the sixth twisted brush (106) are used for cleaning the tooth surface on the throat side of the upper and lower jaw teeth; The seventh twisted brush (107) and the eighth twisted brush (108) are used for cleaning the chewing side of the teeth.

6. A novel U-shaped toothbrush according to claim 4, characterized in that: One end of the first twisted brush (101) is fixedly connected to the square hole shaft at one end of the first working helical gear (a304), and the other end is fixedly connected to the T-shaped anti-run terminal (6) on the same side. One end of the second twisted brush (102) is fixedly connected to the square hole shaft at the other end of the first working helical gear (a304), and the other end is fixedly connected to the T-shaped anti-run terminal (6) on the same side. One end of the seventh twisted brush (107) is fixedly connected to the square hole shaft at one end of the second working helical gear (a307), and the other end is fixedly connected to the T-shaped anti-run terminal (6) on the same side. One end of the eighth twisted brush (108) is fixedly connected to the square hole shaft at the other end of the second working helical gear (a306), and the other end is fixedly connected to the T-shaped anti-run terminal (6) on the same side. One end of the third twisted brush (103) is fixedly connected to the square hole at one end of the third working helical gear (a305), and the other end is fixedly connected to the T-shaped anti-run terminal (6). One end of the fourth twisted brush (104) is fixedly connected to the square hole at the other end of the fourth working helical gear (a305), and the other end is fixedly connected to the T-shaped anti-run terminal (6). One end of the fifth twisted brush (105) is fixedly connected to the square hole on the fifth working helical gear (b305), and the other end is fixedly connected to the T-shaped anti-run terminal (6) at the other end through the support base (5). One end of the sixth twisted brush (106) is fixedly connected to the square hole on the sixth working helical gear (b304), and the other end is fixedly connected to the T-shaped anti-run terminal (6) at the other end through the support base (5).

7. A novel U-shaped toothbrush according to claim 1, characterized in that: The elastic material is 304 stainless steel.

8. A novel U-shaped toothbrush according to claim 1, characterized in that: The motor inside the grip (1) drives all the twisted brushes in the twisted brush group to rotate in the direction from the gum towards the tooth surface.

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