Electric toothbrush with integrated motor

Abstract

The utility model relates to electric toothbrush technical field especially is related to a motor integration's electric toothbrush, including casing, brush head and be used for driving brush head's motor, the motor includes the coil holder with accommodating cavity and rotor, the rotor sets up in accommodating cavity, the position of casing corresponding coil holder both ends is detachably connected with first mounting block and second mounting block respectively, the coil holder is fixed on the casing through first mounting block and second mounting block, one end of rotor is equipped with the pivot and is equipped with the spring piece in the other end, the spring piece is coaxial with the pivot and sets up, the pivot passes through first mounting block and is connected with brush head, the spring piece is also detachably connected with casing away from one end of rotor, the utility model integrates the motor integration in the casing of electric toothbrush, has the advantages such as stable structure and simple and convenient assembly.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrush technology, and in particular to an electric toothbrush with an integrated motor. Background Technology

[0002] As consumers' living standards improve, electric toothbrushes are becoming the best tool for dental care. Through the rapid rotation or vibration of the motor core, the brush head generates high-frequency vibration, instantly breaking down toothpaste into fine foam that deeply cleans between teeth. At the same time, the vibration of the bristles promotes blood circulation in the mouth and has a massaging effect on the gum tissue.

[0003] Patent CN219250504U discloses an electric toothbrush including a housing, a brush head, and a neck. The housing houses a motor for generating oscillating motion on a shaft extending from the motor. The neck is coupled to the shaft so that the oscillating motion can be transmitted to the neck, thereby causing the neck and the shaft to oscillate together to the same degree. This design improves brushing efficiency, is gentle on teeth and gums, and reduces the risk of user discomfort or toothbrush wear.

[0004] However, further investigation revealed the following problems with the solution: the motor is housed inside the casing, but there is no stable connection structure between the casing and the motor. The vibration generated by the motor during operation can easily cause the motor to slip or even become misaligned inside the casing, leading to motor failure and rendering the electric toothbrush unusable. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an electric toothbrush with an integrated motor. This invention integrates the motor into the housing of the electric toothbrush, which has the advantages of stable structure and easy assembly.

[0006] The technical solution adopted by this utility model is as follows: An electric toothbrush with an integrated motor includes a housing, a brush head, and a motor for driving the brush head. The motor includes a coil frame with a receiving cavity and a rotor. The rotor is disposed in the receiving cavity. A first mounting block and a second mounting block are detachably connected to the housing at positions corresponding to both ends of the coil frame. The coil frame is fixed to the housing by the first mounting block and the second mounting block. One end of the rotor is provided with a rotating shaft and the other end is provided with a spring piece. The spring piece is coaxially arranged with the rotating shaft. The rotating shaft passes through the first mounting block and is connected to the brush head. The end of the spring piece away from the rotor is also detachably connected to the housing.

[0007] The first mounting block extends to have at least one insert, and the coil frame has at least one slot adapted to the insert, wherein the insert and the slot are engaged.

[0008] At least one pin extends from the coil frame, and at least one insertion hole adapted to the pin is provided on the second mounting block, wherein the pin and the insertion hole form a snap-fit ​​engagement.

[0009] The spring includes a first connecting end, and the coil frame is wrapped around the outside of the first connecting end. The first connecting end is square, and the outer peripheral wall of the first connecting end is provided with several grooves. The coil frame is also provided with a connecting hole corresponding to the position of the first connecting end.

[0010] The spring also includes a second connecting end, which is also square, and the housing is provided with a slot for the second connecting end to be inserted.

[0011] The first mounting block and the second mounting block are detachably connected to the housing via at least one first fastener, and the spring is detachably connected to the housing via a second fastener.

[0012] The motor also includes a coil and a U-shaped magnetic conductor for magnetic cooperation. The U-shaped magnetic conductor is disposed on the coil frame. The coil is wound around both the U-shaped magnetic conductor and the coil frame. The inner wall of the housing has protruding baffles and baffles. The baffles extend circumferentially on the inner wall of the housing, and the baffles extend axially on the inner wall of the housing. An assembly groove is formed between the baffles and the baffles for the coil frame and the U-shaped magnetic conductor to be embedded simultaneously.

[0013] The rotating shaft is connected to the first mounting block via a bearing.

[0014] The beneficial effects of this utility model are as follows: This utility model integrates the motor into the housing of the electric toothbrush, which has the advantages of stable structure and simple assembly. The coil frame, as one of the components of the motor, is fixed between the first and second mounting blocks, providing solid support and positioning for the motor. This effectively prevents the motor from slipping, misaligning, or loosening within the housing during operation, significantly improving the reliability and service life of the entire electric toothbrush. The rotor shaft directly drives the brush head, while the spring at its other end is detachably connected to the housing. The concentricity of the shaft, rotor, and spring is better. This design not only ensures efficient and direct transmission of driving force but also ensures... The brush head achieves the desired cleaning effect, and the spring-loaded design may help optimize the vibration mode, making the brushing process gentler on teeth and gums and improving the user experience. The first and second mounting blocks are detachably connected, which greatly facilitates the initial assembly of the motor and subsequent maintenance and replacement, reducing the cost and complexity of manufacturing and after-sales repair. This solution structurally integrates the stator of the motor, i.e., the coil frame, with the electric toothbrush housing through mounting blocks, realizing an integrated design of the motor and housing. This not only saves internal space and makes the structure more compact, but also enhances the integrity and rigidity of the integrated structure, helping to reduce unnecessary vibration noise. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of an electric toothbrush with an integrated motor according to the present invention; Figure 2 This is a partial cross-sectional view of the motor in this utility model; Figure 3 This is a partial cross-sectional view of the motor in this utility model from another perspective; Figure 4 This is a partially enlarged view of the shell in this utility model; Figure 5 This is an exploded schematic diagram of the motor in this utility model; In the diagram, 1-shell, 2-brush head, 3-receiving cavity, 4-coil frame, 5-rotor, 6-first mounting block, 7-second mounting block, 8-shaft, 9-spring piece, 10-insertion block, 11-slot, 12-pin, 13-insertion hole, 14-first connecting end, 15-groove, 16-connecting hole, 17-second connecting end, 18-slot, 19-first fastener, 20-second fastener, 21-coil, 22-U-shaped magnetic conductor, 23-stop rib, 24-stop bar, 25-assembly groove, 26-bearing. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figures 1 to 5 As shown in the figure, an embodiment of the present invention is provided, which is an electric toothbrush with an integrated motor, including a housing 1, a brush head 2, and a motor for driving the brush head 2. The motor includes a coil frame 4 with a receiving cavity 3 and a rotor 5. The rotor 5 is disposed in the receiving cavity 3. A first mounting block 6 and a second mounting block 7 are detachably connected to the housing 1 at positions corresponding to both ends of the coil frame 4. The coil frame 4 is fixed to the housing 1 by the first mounting block 6 and the second mounting block 7. One end of the rotor 5 is provided with a rotating shaft 8 and the other end is provided with a spring piece 9. The spring piece 9 is coaxially arranged with the rotating shaft 8. The rotating shaft 8 passes through the first mounting block 6 and is connected to the brush head 2. The end of the spring piece 9 away from the rotor 5 is also detachably connected to the housing 1.

[0021] The beneficial effects of this design are as follows: This utility model integrates the motor into the housing of the electric toothbrush, offering advantages such as structural stability and easy assembly. The coil frame, as a component of the motor, is fixed between the first and second mounting blocks, providing robust support and positioning for the motor. This effectively prevents slippage, misalignment, or loosening of the motor within the housing during operation, significantly improving the overall reliability and lifespan of the electric toothbrush. The rotor shaft directly drives the brush head, while its other end has a detachable spring plate connected to the housing. This design ensures better concentricity of the shaft, rotor, and spring plate, guaranteeing not only efficient and direct transmission of driving force but also ensuring optimal brush head performance. The brush head achieves the desired cleaning effect, and the spring-loaded design may help optimize the vibration mode, making the brushing process gentler on teeth and gums and improving the user experience. The first and second mounting blocks are detachably connected, which greatly facilitates the initial assembly of the motor and subsequent maintenance and replacement, reducing the cost and complexity of manufacturing and after-sales repair. This solution structurally integrates the stator part of the motor, i.e., the coil frame, with the electric toothbrush housing through mounting blocks, realizing an integrated design of the motor and housing. This not only saves internal space and makes the structure more compact, but also enhances the integrity and rigidity of the integrated structure, helping to reduce unnecessary vibration noise.

[0022] In a further configuration, the first mounting block 6 extends to have at least one insert 10, and the coil frame 4 has at least one slot 11 adapted to the insert 10, wherein the insert 10 and the slot 11 form a snap-fit ​​engagement.

[0023] The beneficial effects of this design are as follows: by engaging the insert and the slot, the connection structure between the first mounting block and the coil frame is optimized, which not only provides axial limiting but also adds radial limiting, resulting in precise positioning, a stable connection, and improved assembly efficiency.

[0024] Furthermore, at least one pin 12 extends from the coil frame 4, and at least one insertion hole 13 adapted to the pin 12 is provided on the second mounting block 7, wherein the pin 12 and the insertion hole 13 form a snap-fit ​​engagement.

[0025] The beneficial effects of this design are as follows: the snap-fit ​​between the pin and the socket optimizes the connection structure between the second mounting block and the coil frame, achieving bidirectional locking and fixation, making the force distribution on the motor more uniform and symmetrical, greatly enhancing the structural stability and impact resistance of the motor in high-speed vibration environments. Combined with the snap-fit ​​structure of the first mounting block, it improves the efficiency and accuracy of the overall assembly.

[0026] In a further configuration, the spring 9 includes a first connecting end 14, the coil frame 4 is wrapped around the outside of the first connecting end 14, the first connecting end 14 is square, and the outer peripheral wall of the first connecting end 14 is provided with a plurality of grooves 15, and the coil frame 4 is also provided with a connecting hole 16 corresponding to the position of the first connecting end 14.

[0027] The advantages of this design are as follows: the coil frame is usually made of plastic, while the spring is usually made of metal. The coil frame can be wrapped around the first connecting end using a rubber coating process. Rubber coating is an existing processing technology that uses injection molding to cover the surface of a metal or plastic substrate with a layer of rubber or plastic material. Compared with the traditional dispensing process, it improves wear resistance, anti-slip properties, insulation, and aesthetics. The connection between the coil frame and the spring is more secure, improving product consistency and stability. The square first connecting end and the groove can increase the contact area between the first connecting end and the coil frame, making the rubber coating more secure and further improving the stability of the connection. The coil frame also has connecting holes for the installation of a third fastener. The third fastener can fix the coil frame to the first connecting end, and the third fastener can be installed selectively.

[0028] Furthermore, the spring 9 also includes a second connecting end 17, which is also square, and the housing 1 is provided with a slot 18 for the second connecting end 17 to be inserted.

[0029] The beneficial effects of this design are as follows: the square second connecting end is embedded in the slot, and the other end of the spring can be firmly installed on the housing, making the overall stroke integrated.

[0030] In a further configuration, the first mounting block 6 and the second mounting block 7 are detachably connected to the housing 1 via at least one first fastener 19, and the spring piece 9 is detachably connected to the housing 1 via a second fastener 20.

[0031] The advantages of this design are as follows: the first fastener, the second fastener, and the third fastener in this embodiment all use screws of the prior art, which are easy to install and remove.

[0032] Further, the motor also includes a coil 21 and a U-shaped magnetic conductor 22 for magnetic cooperation. The U-shaped magnetic conductor 22 is disposed on the coil frame 4. The coil 21 is wound around the U-shaped magnetic conductor 22 and the coil frame 4. The inner wall of the housing 1 has protruding baffles 23 and baffles 24. The baffles 23 extend circumferentially on the inner wall of the housing 1, and the baffles 24 extend axially on the inner wall of the housing 1. An assembly groove 25 is formed between the baffles 23 and the baffles 24 for the coil frame 4 and the U-shaped magnetic conductor 22 to be embedded simultaneously.

[0033] The beneficial effects of this design are as follows: the coil and the U-shaped magnetic conductor are also components that enable the motor to drive. The staggered baffles and bars on the housing further support the circumferential direction of the motor, increasing the contact area. The ends of the coil frame and the U-shaped magnetic conductor are embedded in the assembly groove and firmly fixed to prevent the coil frame and the U-shaped magnetic conductor from rotating.

[0034] Furthermore, the rotating shaft 8 is connected to the first mounting block 6 via a bearing 26.

[0035] The advantages of this design are as follows: ball bearings with existing technology can be used to ensure the stability of the shaft.

[0036] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An electric toothbrush with an integrated motor, comprising a housing (1), a brush head (2), and a motor for driving the brush head (2), characterized in that: The motor includes a coil frame (4) with a receiving cavity (3) and a rotor (5). The rotor (5) is disposed in the receiving cavity (3). A first mounting block (6) and a second mounting block (7) are detachably connected to the housing (1) at the positions corresponding to both ends of the coil frame (4). The coil frame (4) is fixed to the housing (1) by the first mounting block (6) and the second mounting block (7). One end of the rotor (5) is provided with a rotating shaft (8) and the other end is provided with a spring piece (9). The spring piece (9) is coaxially arranged with the rotating shaft (8). The rotating shaft (8) passes through the first mounting block (6) and is connected to the brush head (2). The end of the spring piece (9) away from the rotor (5) is also detachably connected to the housing (1).

2. The electric toothbrush with integrated motor according to claim 1, characterized in that: The first mounting block (6) extends with at least one insert (10), and the coil frame (4) is provided with at least one slot (11) that is adapted to the insert (10), and the insert (10) and the slot (11) form a snap-fit ​​engagement.

3. The electric toothbrush with integrated motor according to claim 1, characterized in that: At least one pin (12) extends from the coil frame (4), and at least one socket (13) adapted to the pin (12) is provided on the second mounting block (7), and the pin (12) and the socket (13) form a snap-fit ​​engagement.

4. The electric toothbrush with integrated motor according to claim 1, characterized in that: The spring (9) includes a first connecting end (14), and the coil frame (4) is wrapped around the outside of the first connecting end (14). The first connecting end (14) is square, and the outer peripheral wall of the first connecting end (14) is provided with a number of grooves (15). The coil frame (4) is also provided with a connecting hole (16) at the position corresponding to the first connecting end (14).

5. An electric toothbrush with an integrated motor according to claim 4, characterized in that: The spring (9) also includes a second connecting end (17), which is also square. The housing (1) is provided with a slot (18) for the second connecting end (17) to be inserted.

6. An electric toothbrush with an integrated motor according to claim 1, characterized in that: The first mounting block (6) and the second mounting block (7) are detachably connected to the housing (1) by at least one first fastener (19), and the spring piece (9) is detachably connected to the housing (1) by a second fastener (20).

7. An electric toothbrush with an integrated motor according to claim 1, characterized in that: The motor also includes a coil (21) and a U-shaped magnetic conductor (22) for magnetic cooperation. The U-shaped magnetic conductor (22) is disposed on the coil frame (4). The coil (21) is wound around the U-shaped magnetic conductor (22) and the coil frame (4) at the same time. The inner wall of the housing (1) has a baffle (23) and a baffle (24) protruding. The baffle (23) extends circumferentially on the inner wall of the housing (1), and the baffle (24) extends axially on the inner wall of the housing (1). An assembly groove (25) is formed between the baffle (23) and the baffle (24) for the coil frame (4) and the U-shaped magnetic conductor (22) to be embedded at the same time.

8. An electric toothbrush with an integrated motor according to claim 1, characterized in that: The rotating shaft (8) is connected to the first mounting block (6) via a bearing (26).

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