Electric toothbrush

Abstract

The utility model discloses an electric toothbrush which comprises a handle and a brush head, and a motor, a driving gear, a driven gear, a swing shaft piece and a shaft rod are arranged in the handle. The driving gear is connected with the motor, the driven gear is located on one side of the driving gear and meshed with the driving gear, the swing shaft piece is arranged on the driven gear, the connecting position of the swing shaft piece and the driven gear is located at the non-axis position of the driven gear, one end of the shaft rod is connected with the swing shaft piece, and the other end of the shaft rod extends out of the handle and is connected with the brush head. The driving gear drives the driven gear to rotate when driven by the motor, and the swing shaft piece pulls the shaft rod to rotate back and forth along the axis of the shaft rod when the driven gear rotates so as to drive the brush head to rotate back and forth. Therefore, the swinging movement stroke of the shaft rod can be effectively increased, the swinging radian of the brush head driven by the shaft rod is increased, more power driven and output by the same motor can be transmitted to the brush head, and the cleaning capacity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oral cavity cleaning article's technical field, especially in kind of electric toothbrush. BACKGROUND

[0002] It is known that electric toothbrush can be divided into acoustic wave electric toothbrush, rotary electric toothbrush. Electric toothbrush makes the brush head produce high frequency reciprocating rotation or reciprocating vibration through the rapid rotation or vibration of motor core, to decompose toothpaste into fine foam, and clean the interdental space.

[0003] At present, the transmission structure of motor power of the rotary electric toothbrush existing on the market is mostly designed in one body with transmission wheel and transmission shaft, or adopts the mode that eccentric shaft circumferential rotation drives transmission shaft swing, to transmit the power of motor to the brush head, but because the distance between motor and brush head is far, the distance of motor power transmission is far, and the above transmission structure easily leads to the swing angle of transmission to the brush head not enough big, leading to the rotation angle of brush head small, leading to the cleaning ability not enough. INNOVATION CONTENT

[0004] The main purpose of the utility model is to provide a kind of electric toothbrush, for solving the problem that the distance between the motor and brush head of existing electric toothbrush is far, leading to the swing angle of transmission to the brush head not enough big.

[0005] In order to solve the above technical problem, the technical scheme provided by the utility model is:

[0006] An electric toothbrush, including handle and brush head, the handle is provided with motor, driving gear, driven gear, swing shaft piece and shaft rod inside;The driving gear is connected with motor, the driven gear is located on one side of driving gear and is engaged with driving gear, the swing shaft piece is arranged on the driven gear, and the position of swing shaft piece and driven gear connection is located at the position of non-axis of driven gear, one end of the shaft rod is connected with swing shaft piece, the other end of the shaft rod extends outside handle and is connected with brush head;

[0007] The driving gear drives the driven gear to rotate when the motor drives;The swing shaft piece pulls the shaft rod reciprocating rotation along its axis when the driven gear rotates, to drive the brush head reciprocating rotation.

[0008] Further, the swing shaft piece includes connecting rod and swing arm, the swing arm is provided with fixing port for fixing shaft rod, the swing arm is connected with connecting part beside fixing port, the connecting rod includes first end part and second end part connected with first end part, the connecting part is connected with first end part, the second end part is connected with driven gear, and the second end part is located on one side of the center line of driven gear.

[0009] Further, the connecting part is a first cylinder, the first end part is provided with a plug hole, and the first cylinder is arranged in the plug hole; the fixing hole is a circular hole, an embedded block is arranged in the circular hole, and the shaft rod is provided with an avoiding slot at a position corresponding to the embedded block.

[0010] Further, the handle is further provided with a gear box with a first mounting cavity, the driving gear, the driven gear, the connecting rod and the swing arm are arranged in the first mounting cavity, the motor is located on a side of the gear box away from the brush head, a rotating shaft part of the motor is arranged in the first mounting cavity, and the driven gear is rotationally arranged on the gear box.

[0011] Further, the gear box is provided with a limiting support, the limiting support is provided with a first limiting hole for limiting the shaft rod, and one end of the shaft rod is arranged in the first limiting hole after passing through the fixing hole.

[0012] Further, the driven gear is provided with a second cylinder on one side of a center line of the driven gear, the second cylinder is connected with a third cylinder on a side away from the driven gear, a center axis of the third cylinder is in a same straight line as a center axis of the driven gear, the third cylinder is rotationally arranged on the gear box, and the second end part is arranged on the second cylinder; the driven gear drives the second cylinder to rotate and drives the third cylinder to rotate through the second cylinder.

[0013] Further, the gear box is provided with a second limiting hole and a third limiting hole on two opposite side walls of the first mounting cavity, and the third cylinder is arranged in the second limiting hole; the driven gear is connected with a fourth cylinder on a side close to the motor, and the fourth cylinder is arranged in the third limiting hole.

[0014] Further, the gear box comprises a box body and a box cover connected with the box body to form the first mounting cavity, the motor is mechanically arranged at one end of the box body away from the box cover, and one end of the shaft rod passes through the box cover and is arranged in the first mounting cavity.

[0015] Further, the handle is further provided with a battery, a circuit board and a mounting support with a second mounting cavity and a third mounting cavity, the motor is arranged in the second mounting cavity, the battery is arranged in the third mounting cavity, the gear box is connected with the mounting support, and the gear box is located on a side of the second mounting cavity away from the third mounting cavity.

[0016] The battery and the motor are electrically connected with the circuit board, a C-shaped groove for limiting the circuit board is arranged on a side wall of the gear box and / or a side wall of the mounting support, and the circuit board is arranged in the C-shaped groove.

[0017] Further, the gear box is provided with a clamping block at one end close to the mounting support, the mounting support is provided with a clamping hole, and the clamping block is arranged in the clamping hole.

[0018] Compared with the prior art, the utility model discloses the following beneficial effects: the utility model discloses the configuration is directly connected with motor through the driving gear, and the driven gear is located one side of the driving gear, and the shaft rod is connected with the driven gear through the swing axle piece, and the position of swing axle piece and driven gear connection is eccentric position of driven gear, and therefore, the movement stroke of the shaft rod swing can be effectively increased, the arc of the shaft rod driving the brush head swing is increased, and the power of the same motor driving output can be more transmitted to the brush head, and the cleaning capacity is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0020] Figure 1 It is the perspective view of the utility model;

[0021] Figure 2 It is the partial exploded view of the utility model;

[0022] Figure 3 It is the explosion view of the handle of the utility model;

[0023] Figure 4 It is the explosion view of the handle of the utility model;

[0024] Figure 5 It is the assembly drawing between the motor, the gear box and the shaft rod of the utility model;

[0025] Figure 6 It is the partial explosion view of the handle interior of the utility model;

[0026] Figure 7 It is the assembly schematic view between the motor, the driving gear, the driven gear, the swing axle piece and the shaft rod of the utility model. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] Refer to the drawings Figures 1-7The utility model discloses an electric toothbrush.

[0029] The electric toothbrush comprises a handle 1 and a brush head 2, the handle 1 is internally provided with a motor 7, a driving gear 71, a driven gear 72, a swing shaft piece and a shaft rod 3. The driving gear 71 is connected with the motor 7, the driven gear 72 is located on one side of the driving gear 71 and is engaged with the driving gear 71, the swing shaft piece is arranged on the driven gear 72, and the position where the swing shaft piece is connected with the driven gear 72 is located at a position deviating from the axis of the driven gear 72, one end of the shaft rod 3 is connected with the swing shaft piece, and the other end of the shaft rod 3 extends out of the handle 1 and is connected with the brush head 2. When the motor 7 drives the driving gear 71, the driving gear 71 drives the driven gear 72 to rotate, and when the driven gear 72 rotates, the swing shaft piece pulls the shaft rod 3 to reciprocate along the axis of the shaft rod 3, so as to drive the brush head 2 to reciprocate.

[0030] The utility model discloses a configuration directly connects the driving gear 71 with the motor 7, and the driven gear 72 is located on one side of the driving gear 71, and then the swing shaft piece is used to connect the shaft rod 3 with the driven gear 72, and the position where the swing shaft piece is connected with the driven gear 72 is the eccentric position of the driven gear 72, so that the movement stroke of the swing of the shaft rod 3 can be effectively increased, the arc of the swing of the shaft rod 3 driven brush head 2 is increased, the power output by the same motor 7 can be more transmitted to the brush head 2, the cleaning ability is improved, and the problem that the distance between the motor 7 and the brush head 2 of the existing electric toothbrush is far, resulting in that the swing angle of the brush head 2 is not enough is solved.

[0031] Specifically, the axis of the shaft rod 3 refers to the axis of the shaft rod 3 in the initial state, that is, the axis of the shaft rod 3 in the static state. In this way, when the driven gear 72 rotates, the swing shaft piece can drive the shaft rod 3 to reciprocate along the axis of the shaft rod 3 in the initial state.

[0032] In an embodiment, in order to make the transmission structure between the motor 7 and the shaft rod 3 more compact, the swing shaft piece comprises a connecting rod 73 and a swing arm 74. The swing arm 74 is provided with a fixing port 743 for fixing the shaft rod 3, the swing arm 74 is connected with the connecting part 742 beside the fixing port 743, the connecting rod 73 comprises a first end part 732 and a second end part 731 connected with the first end part 732, the connecting part 742 is connected with the first end part 732, the second end part 731 is connected with the driven gear 72, and the second end part 731 is located on one side of the center line of the driven gear 72, so that when the driven gear 72 rotates, the connecting rod 73 can pull the swing arm 74 to move, that is, drive the shaft rod 3 to swing.

[0033] In an embodiment, the connecting portion 742 is a first cylinder, the first end portion 732 is provided with a plug-in hole 733, and the first cylinder is arranged in the plug-in hole 733 to connect the connecting rod 73 and the swing arm 74. The fixing hole 743 is a circular hole, and the circular hole is provided with an embedded block 741. The shaft 3 is provided with an avoiding groove 31 at a position corresponding to the embedded block 741 to fixedly connect the swing arm 74 and the shaft 3, so that the shaft 3 does not rotate relative to the swing arm 74, and the shaft 3 is directly driven to swing by the swing arm 74 when the connecting rod 73 is driven to move by the driven gear 72.

[0034] Of course, in other embodiments, the swing shaft member can only include the connecting rod 73 and does not include the swing arm 74, and the driven gear 72 can directly drive the shaft 3 to move through the connecting rod 73.

[0035] In an embodiment, the handle 1 is further provided with a gear box 6 having a first mounting cavity 614, the driving gear 71, the driven gear 72, the connecting rod 73 and the swing arm 74 are arranged in the first mounting cavity 614, the motor 7 is located on a side of the gear box 6 away from the brush head 2, a rotating shaft portion of the motor 7 is arranged in the first mounting cavity 614, and the driven gear 72 is rotatably arranged on the gear box 6. The gear box 6 is used to increase the stability of the structure of the electric toothbrush.

[0036] In an embodiment, the gear box 6 is provided with a limiting support 612, the limiting support 612 is provided with a first limiting hole 613 for limiting the shaft 3, and one end of the shaft 3 is arranged in the first limiting hole 613 after passing through the fixing hole 743, so as to further limit the position of the shaft 3 and improve the stability of the shaft 3 installed on the handle 1.

[0037] In an embodiment, the driven gear 72 is provided with a second cylinder 722 on one side of a center line of the driven gear 72, the second cylinder 722 is connected with a third cylinder 721 on a side away from the driven gear 72, the center axis of the third cylinder 721 is in the same straight line with the center axis of the driven gear 72, the third cylinder 721 is rotatably arranged on the gear box 6, the second end portion 731 is sleeved on the second cylinder 722, the driven gear 72 drives the second cylinder 722 to rotate and drives the third cylinder 721 to rotate through the second cylinder 722 when the driven gear 72 rotates, so as to rotatably arrange the driven gear 72 in the gear box 6. In combination with the limiting of the shaft 3 by the limiting support 612 and the connection of the connecting rod 73 and the swing arm 74 between the driven gear 72 and the shaft 3, the position of the swing shaft member can be limited, and the swing shaft member can be stably installed in the first mounting cavity 614.

[0038] In an embodiment, the gear box 6 is provided with a second limiting opening 621 and a third limiting opening 615 on the opposite side walls of the first mounting cavity 614 respectively, and the third cylinder 721 is arranged in the second limiting opening 621. The driven gear 72 is connected with a fourth cylinder 723 on the side close to the motor 7, and the fourth cylinder 723 is arranged in the third limiting opening 615. In this way, the driven gear 72 can be arranged in rotation in the gear box 6, and the installation of the driven gear 72 can be kept stable.

[0039] In an embodiment, the gear box 6 comprises a box body 61 and a box cover 62 connected with the box body 61 to form the first mounting cavity 614. The motor 7 is mechanically arranged at the end of the box body 61 away from the box cover 62, and one end of the shaft 3 passes through the box cover 62 and is arranged in the first mounting cavity 614, so as to facilitate the production and manufacture of the gear box 6, and facilitate the installation of the driving gear 71, the driven gear 72, the swing arm 74 and the connecting rod 73 in the first mounting cavity 614. The limiting support 612 is arranged on the box body 61, the second limiting opening 621 is arranged on the box cover 62, and the third limiting opening 615 is arranged on the box body 61.

[0040] In the above embodiment, the handle 1 is further provided with a battery 8, a circuit board 4 and a mounting support 5 with a second mounting cavity 52 and a third mounting cavity 51. The motor 7 is arranged in the second mounting cavity 52, and the battery 8 is arranged in the third mounting cavity 51. The gear box 6 is connected with the mounting support 5 and is located on the side of the second mounting cavity 52 away from the third mounting cavity 51. The battery 8 and the motor 7 are electrically connected with the circuit board 4. The side wall of the gear box 6 and / or the side wall of the mounting support 5 is provided with a C-shaped groove 54 for limiting the circuit board 4, and the circuit board 4 is arranged in the C-shaped groove 54. By arranging the battery 8, the circuit board 4 can be powered. The charging and discharging of the battery 8 and the driving of the motor 7 are controlled by the circuit board 4. In addition, by arranging the mounting support 5, the motor 7, the battery 8 and the circuit board 4 can be orderly assembled, and the structure of the handle 1 is more compact.

[0041] In an embodiment, the gear box 6 is provided with a clamping block 611 at one end close to the mounting support 5, and the mounting support 5 is provided with a clamping opening 53, and the clamping block 611 is arranged in the clamping opening 53, so as to fix the gear box 6 on the mounting support 5. In this way, when the mounting support 5 is assembled into the handle 1, the battery 8, the motor 7, the circuit board 4 and the gear box 6 can be installed in the mounting support 5 in advance to form an integral whole, so as to be installed together into the handle 1. Of course, in other embodiments, the mounting support 5 and the gear box 6 can also be fixed integrally by means of screws, glue and the like.

[0042] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.

[0043] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" throughout the text includes three schemes, taking A and / or B as an example, including A technical solution, B technical solution, and A and B simultaneously satisfying the technical solution; in addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0044] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields under the utility model concept of the present application are included in the patent protection range of the present application.

Claims

1. An electric toothbrush characterized by comprising: The handle is internally provided with a motor, a driving gear, a driven gear, a swing shaft and a shaft rod; the driving gear is connected with the motor, the driven gear is located on one side of the driving gear and engaged with the driving gear, the swing shaft is arranged on the driven gear, and the position where the swing shaft is connected with the driven gear is located at a position deviating from the axis of the driven gear, one end of the shaft rod is connected with the swing shaft, and the other end of the shaft rod extends out of the handle and is connected with the brush head; The driving gear drives the driven gear to rotate when the motor is driven; the swing shaft pulls the shaft rod to reciprocating rotate along the axis thereof when the driven gear rotates, so as to drive the brush head to reciprocating rotate.

2. The electric toothbrush according to claim 1, wherein The swing shaft comprises a connecting rod and a swing arm, the swing arm is provided with a fixing hole for fixing the shaft rod, and the swing arm is connected with the connecting rod at the position beside the fixing hole; the connecting rod comprises a first end and a second end connected with the first end, the connecting part is connected with the first end, and the second end is connected with the driven gear; the second end is located on one side of the center line of the driven gear.

3. The electric toothbrush according to claim 2, wherein The connecting part is a first cylinder, the first end is provided with a plug-in hole, and the first cylinder is arranged in the plug-in hole; the fixing hole is a circular hole, and the circular hole is provided with an embedded block, and the shaft rod is provided with an avoiding slot at the position corresponding to the embedded block.

4. The electric toothbrush according to claim 2, wherein The handle is further provided with a gear box with a first installation cavity, the driving gear, the driven gear, the connecting rod and the swing arm are arranged in the first installation cavity, the motor is located on the side of the gear box away from the brush head, the rotating shaft of the motor is partially arranged in the first installation cavity, and the driven gear is rotatably arranged on the gear box.

5. The electric toothbrush according to claim 4, wherein The gear box is provided with a limiting support, the limiting support is provided with a first limiting hole for limiting the shaft rod, and one end of the shaft rod passes through the fixing hole and is arranged in the first limiting hole.

6. The electric toothbrush according to claim 4, wherein The driven gear is provided with a second cylinder on one side of the center line thereof, the second cylinder is connected with a third cylinder on the side away from the driven gear, the center axis of the third cylinder is in the same straight line with the center axis of the driven gear, the third cylinder is rotatably arranged on the gear box, and the second end is sleeved on the second cylinder; the driven gear drives the second cylinder to rotate and drives the third cylinder to rotate through the second cylinder.

7. The electric toothbrush according to claim 6, characterized in that The gear box is provided with a second limiting hole and a third limiting hole on the opposite side walls of the first installation cavity, respectively, the third cylinder is arranged in the second limiting hole, and the driven gear is connected with a fourth cylinder on the side close to the motor; the fourth cylinder is arranged in the third limiting hole.

8. The electric toothbrush according to claim 4, wherein The gear box comprises a box body and a box cover connected with the box body to form the first installation cavity, the motor is mechanically arranged at one end of the box body away from the box cover, and one end of the shaft rod passes through the box cover and is arranged in the first installation cavity.

9. The electric toothbrush according to claim 4, wherein The handle is further provided with a battery, a circuit board and a mounting support with a second installation cavity and a third installation cavity, the motor is arranged in the second installation cavity, the battery is arranged in the third installation cavity, the gear box is connected with the mounting support, and the gear box is located on the side of the second installation cavity away from the third installation cavity. The battery and the motor are electrically connected with the circuit board, and a C-shaped groove for limiting the circuit board is arranged on the side wall of the gear box and / or the side wall of the mounting bracket, and the circuit board is arranged in the C-shaped groove.

10. The electric toothbrush according to claim 9, wherein The gear box is provided with a clamping block at one end close to the mounting bracket, a clamping hole is arranged on the mounting bracket, and the clamping block is arranged in the clamping hole.

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