Electric toothbrush

Abstract

The utility model discloses an electric toothbrush which comprises a body, a direct-current motor is arranged in the body, an output shaft of the direct-current motor is connected with a turntable, a connecting rod capable of synchronously rotating is arranged on the turntable, and the connecting rod and the output shaft of the direct-current motor are eccentrically arranged; the connecting rod can be connected with one end of a rotating shaft sleeve, the other end of the rotating shaft sleeve is connected with a deflection support, the rotating shaft sleeve can drive a swing rod on the deflection support to periodically swing up and down, the swing rod is further hinged to one end of a pull rod, and the other end of the pull rod is hinged to one end of a sliding shaft. Periodic swing of the swing rod can enable the sliding shaft to move left and right periodically through the pull rod, a direct-current motor engine is adopted, a gear transmission mechanism is omitted, and the whole engine assembly is not provided with gears; and transmission is carried out through a point contact swinging and rotating structure, so that transmission is smoother, and noise is lower.

Description

Technical Field

[0001] The utility model relates to an electric toothbrush. Background Art

[0002] Currently, electric toothbrushes on the market generally use DC motors as engines through mechanical transmission, or use sonic motors as engines. Although the use of sonic motors as electric toothbrushes has good effects, sonic motors are expensive and require an electronic control board to drive them. DC motors use gear mechanism transmission devices as engines. Although their cost is lower than that of sonic motors, their transmission sound is loud and will produce a lot of noise, which gives users a poor experience. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present utility model is to provide an electric toothbrush.

[0004] The utility model is realized by the following technical solutions:

[0005] An electric toothbrush comprises a main body, wherein a DC motor is arranged in the main body, the output shaft of the DC motor is connected to a turntable, the turntable is provided with a connecting rod that can rotate synchronously, and the connecting rod is eccentrically arranged with the output shaft of the DC motor; the connecting rod can be connected to one end of a rotating sleeve, and the other end of the rotating sleeve is connected to a deflection bracket, and the rotating sleeve can drive a rocker arm on the deflection bracket to swing up and down periodically, and the rocker arm is also hinged to one end of a pull rod, and the other end of the pull rod is hinged to one end of a sliding shaft, and the periodic swing of the rocker arm can cause the sliding shaft to move left and right periodically via the pull rod.

[0006] In an embodiment of the utility model, an installation cavity is provided in the rotating sleeve, and a ball head is provided at the end of the connecting rod that can extend into the installation cavity. The ball head can abut and cooperate with the inner wall of the installation cavity, and the connecting rod can drive one end of the rotating sleeve to rotate in a circle.

[0007] In an embodiment of the utility model, the deflection bracket also includes a rotating shaft, and the main body is provided with mounting holes distributed front and back, and the two ends of the rotating shaft can be connected with the mounting holes so that the rotating shaft can rotate relative to the main body; the other end of the rotating sleeve is provided with a slot, and the rotating sleeve located at the upper and / or lower end of the slot is provided with a connecting hole, and the rotating shaft is provided with a pin shaft that can cooperate with the connecting hole.

[0008] In an embodiment of the present invention, a through hole connecting the inside and outside of the body is provided at one end of the body, the sliding shaft can move axially back and forth in the through hole, the other end of the sliding shaft can extend out of the outside of the body, and one end of the sliding shaft is connected to the pull rod located inside the body.

[0009] In an embodiment of the present invention, the DC motor is arranged at the other end of the body.

[0010] In an embodiment of the present invention, a shell is further included, which is sleeved on the outer periphery of the body. A power module that can be electrically connected to the DC motor is arranged in the shell, and the power module is located beside the other end of the body.

[0011] In an embodiment of the utility model, it also includes a sealing ring mounted on the outer periphery of the sliding shaft, one end of the sealing ring is in abutment with the outer end face of the main body located on the side of the through hole, and the outer shell also includes a sleeve mounted on the outer periphery of the through hole, the sliding shaft can be placed in the sleeve, a boss is provided in the sleeve, and the other end of the sealing ring is in abutment with the end face of the boss.

[0012] In an embodiment of the present invention, a brush handle is further included. One end of the brush handle is sleeved on the outer circumference of the sleeve, and a brush head is provided at the other end of the brush handle.

[0013] In an embodiment of the present invention, the brush head is connected to one end of a brush head pull rod, and the other end of the brush head pull rod is connected to a sliding shaft.

[0014] The utility model provides an electric toothbrush with the following beneficial effects: the gear transmission mechanism of the DC motor engine is removed, and the entire engine assembly has no gears; the transmission is carried out through a point contact swing and rotation structure, which makes the transmission smoother, reduces the sound generated by the transmission, and reduces the noise, giving consumers a better experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the utility model when placed vertically.

[0017] Figure 2 It is a schematic diagram of the utility model when the main body is placed horizontally.

[0018] Figure 3 It is a schematic diagram of state 1 of the present utility model.

[0019] Figure 4 This is a schematic diagram of the second state of the utility model Figure 1 .

[0020] Figure 5 This is a schematic diagram of the second state of the utility model Figure 2 .

[0021] Figure 6 yes Figure 1 Enlarged schematic diagram of point A in the middle. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] With reference to the drawings in the specification, the following description of the orientation is based on the state when the electric toothbrush is in a horizontal position. An electric toothbrush includes a main body 11, in which a DC motor 12 is arranged. The output shaft 13 of the DC motor is connected to a turntable 20, and a connecting rod 21 that can rotate synchronously is provided on the turntable. The connecting rod is eccentrically arranged with the output shaft of the DC motor, so that the connecting rod can rotate forward and backward in a vertical plane; the connecting rod can be connected to one end of the rotating sleeve 30, and the other end of the rotating sleeve is connected to the deflection bracket 40. The rotating sleeve can drive the rocker arm 41 on the deflection bracket to swing up and down periodically, and the rocker arm is also hinged to one end of the pull rod 51, and the other end of the pull rod is hinged to one end of the sliding shaft 52. The periodic swing of the rocker arm can cause the sliding shaft to move left and right periodically via the pull rod, and finally drive the left and right movement of the brush head to realize the brushing operation.

[0028] Preferably, the rotating sleeve is provided with a mounting cavity 31, and the end of the connecting rod is provided with a ball head 22 that can extend into the mounting cavity. The ball head can abut against the inner wall of the mounting cavity, and the connecting rod can drive one end of the rotating sleeve to rotate in a circle. The deflection bracket also includes a rotating shaft 42. The main body is provided with mounting holes 14 distributed front and back. The two ends of the rotating shaft can be connected with the mounting holes to enable the rotating shaft to rotate relative to the main body; the other end of the rotating sleeve is provided with a slot 32, reference Figure 2 The slot is a transverse slot, and a connecting hole 33 is provided on the rotating sleeve located at the upper end and / or lower end of the slot. A pin 43 that can cooperate with the connecting hole is provided on the rotating shaft, so that the motion trajectory of the rotating sleeve can be a cone. The connecting hole and the pin form a rotating fulcrum. The rotation of the rotating sleeve and the connecting rod connection section enables the other end to drive the deflection bracket to swing up and down periodically.

[0029] Furthermore, one end of the body is provided with a through hole 15 connecting the inside and outside of the body. The sliding shaft can move axially back and forth in the through hole, forming a piston-like structure to ultimately achieve the movement of the brush head. The other end of the sliding shaft can extend outside the body. One end of the sliding shaft is connected to a pull rod located inside the body. The DC motor is provided at the other end of the body.

[0030] Furthermore, it also includes a shell 10, which is arranged on the periphery of the body. A power module 16 that can be electrically connected to the DC motor is provided in the shell. The power module is located next to the other end of the body. The power module provides electrical energy to the DC motor to drive it to work.

[0031] Preferably, it further includes a sealing ring 60 sleeved on the outer periphery of the sliding shaft, one end of the sealing ring abuts and cooperates with the outer end face of the main body located on the side of the through hole, and the shell also includes a sleeve 17 sleeved on the outer periphery of the through hole, the sliding shaft can be placed in the sleeve, a boss 18 is provided in the sleeve, and the other end of the sealing ring abuts and cooperates with the end face of the boss. Through the abutment and cooperation of the two end faces of the sealing ring, the shell and the main body clamp the sealing ring so that it will not move with the sliding shaft.

[0032] Furthermore, it also includes a brush handle 70, one end of which is sleeved on the outer periphery of the sleeve, and the other end of the brush handle is provided with a brush head 71. The brush head is connected to one end of a brush head pull rod 72, and the other end of the brush head pull rod is connected to the sliding shaft.

[0033] More specifically, the present invention is mainly an electric toothbrush transmission structure, comprising a housing, a power module, a DC motor, a transmission assembly, a body, a brush head pull rod, a brush head, etc., wherein the transmission assembly is fixed in the body. The transmission assembly includes a connecting rod eccentrically arranged with the DC motor, a rotating sleeve, a deflection bracket, a pull rod, and a sliding shaft. The connecting rod has a ball head (a spherical body) along the output shaft direction of the DC motor. The ball head contacts the cross section of the rotating sleeve mounting cavity. The rotating sleeve drives the deflection bracket to swing back and forth through the rotating fulcrum. The rotating sleeve and the deflection bracket form a rotating fulcrum, and the mounting cavity is located on the rotating sleeve at the other end of the rotating fulcrum. When the utility model is in use, the DC motor works, the output shaft drives the connecting rod to rotate, the ball head of the connecting rod along the direction of the output shaft drives the rotating shaft sleeve to perform a circular motion, the circular motion of the rotating shaft sleeve drives the deflection bracket to swing up and down, and the pull rod drives the sliding shaft to slide back and forth, the back and forth sliding of the sliding shaft drives the brush head pull rod to pull back and forth, and the brush head pull rod pulls the brush head to rotate back and forth to clean the teeth.

[0034] The foregoing description shows and describes preferred embodiments of the present invention. As previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the present invention as taught herein or through the techniques or knowledge of the relevant art. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. An electric toothbrush comprising a body, wherein a DC motor is provided in the body, wherein an output shaft of the DC motor is connected to a turntable, wherein: The turntable is provided with a connecting rod that can rotate synchronously, and the connecting rod is eccentrically arranged with the output shaft of the DC motor; the connecting rod can be connected to one end of the rotating sleeve, and the other end of the rotating sleeve is connected to the deflection bracket. The rotating sleeve can drive the rocker arm on the deflection bracket to swing up and down periodically, and the rocker arm is also hinged to one end of the pull rod, and the other end of the pull rod is hinged to one end of the sliding shaft. The periodic swing of the rocker arm can cause the sliding shaft to move left and right periodically via the pull rod.

2. An electric toothbrush according to claim 1, characterized in that: The rotating sleeve is provided with a mounting cavity, the end of the connecting rod is provided with a ball head which can extend into the mounting cavity, the ball head can abut and cooperate with the inner circumferential wall of the mounting cavity, and the connecting rod can drive one end of the rotating sleeve to rotate in a circle.

3. An electric toothbrush according to claim 2, characterized in that: The deflection bracket also includes a rotating shaft, and the main body is provided with mounting holes distributed front and back, and the two ends of the rotating shaft can be matched with the mounting holes so that the rotating shaft can rotate relative to the main body; the other end of the rotating sleeve is provided with a slot, and the rotating sleeve located at the upper end and / or lower end of the slot is provided with a connecting hole, and the rotating shaft is provided with a pin shaft that can cooperate with the connecting hole.

4. An electric toothbrush according to any one of claims 1 to 3, characterized in that: One end of the body is provided with a through hole connecting the inside and outside of the body, the sliding shaft can move axially back and forth in the through hole, the other end of the sliding shaft can extend out of the body, and one end of the sliding shaft is connected to the pull rod located in the body.

5. An electric toothbrush according to claim 4, characterized in that: The DC motor is arranged at the other end of the body.

6. An electric toothbrush according to claim 5, characterized in that: The utility model further comprises a shell, which is sleeved on the outer periphery of the main body. A power module electrically connected to the DC motor is arranged in the shell, and the power module is located beside the other end of the main body.

7. An electric toothbrush according to claim 6, characterized in that: It also includes a sealing ring sleeved on the outer periphery of the sliding shaft, one end of the sealing ring abuts and cooperates with the outer end face of the main body located on the side of the through hole, and the outer shell also includes a sleeve sleeved on the outer periphery of the through hole, the sliding shaft can be placed in the sleeve, a boss is provided in the sleeve, and the other end of the sealing ring abuts and cooperates with the end face of the boss.

8. An electric toothbrush according to claim 7, characterized in that: The utility model also comprises a brush handle, one end of which is sleeved on the outer periphery of the sleeve, and the other end of which is provided with a brush head.

9. An electric toothbrush according to claim 8, characterized in that: The brush head is connected to one end of a brush head pull rod, and the other end of the brush head pull rod is connected to a sliding shaft.

Images