Toothbrush

Abstract

The invention discloses a toothbrush. The toothbrush comprises a brush head and a handle, the brush head comprises a brush head shell detachably connected with the handle, a brush head driving shaft and a brush head connecting piece connected with the handle driving shaft and the brush head driving shaft; the brush head connecting piece performs linear reciprocating motion along the axis (L1) of the toothbrush along with the handle driving shaft; the brushhead drive shaft and the brushhead coupling are configured to convert a linear reciprocating motion of the brushhead coupling into a rotary reciprocating motion of the brushhead drive shaft about an axis (L1) of the toothbrush. Therefore, the motor in the toothbrush handle is not limited to drive the brush head to rotate back and forth only by rotating and reciprocating, and the possibility of applying motors with different driving modes to the brush head is provided.

Description

Technical Field

[0001] The present application relates to the field of personal hygiene products, and in particular to a toothbrush. Background Art

[0002] At present, common electric toothbrushes include a handle structure and a brush head structure, wherein a brush head body is provided at one end of the brush head structure away from the handle structure, and the cleaning of the oral teeth is achieved through the automatic movement of the brush head body; in related technologies, the movement form of the brush head body is mostly vibration movement, and the vibration movement is difficult to thoroughly clean the internal teeth of the oral cavity, resulting in poor cleaning effect.

[0003] It should be noted that the above contents are only used to assist in understanding the technical solution of the present application, and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The present application provides a toothbrush, which comprises a brush head and a handle; the brush head comprises a brush head shell detachably connected to the handle, a brush head drive shaft, and a brush head connector connecting the handle drive shaft and the brush head drive shaft; the brush head connector follows the handle drive shaft to make linear reciprocating motion along the axis (L1) of the toothbrush; the brush head drive shaft and the brush head connector are constructed to convert the linear reciprocating motion of the brush head connector into a rotational reciprocating motion of the brush head drive shaft around the axis (L1) of the toothbrush.

[0005] Therefore, through the above conversion, the motor in the toothbrush handle is no longer limited to only rotating reciprocating motion to drive the brush head to rotate reciprocatingly, providing the possibility of applying motors with different driving modes to this type of brush head.

[0006] According to one aspect of the present application, the brush head connecting member includes a connecting sleeve into which the brush head drive shaft can be inserted; the outer wall of the brush head drive shaft is provided with a guide protrusion; the connecting sleeve is provided with a guide groove that slides with the guide protrusion, so that when the connecting sleeve moves along the axis (L1) of the toothbrush, the guide protrusion rotates around the axis (L1) of the toothbrush.

[0007] According to one aspect of the present application, the brush head drive shaft includes a crossbar and a mounting channel formed radially through the crossbar for insertion into the crossbar; the portion of the crossbar outside the mounting channel forms the guide protrusion. Thus, the brush head drive shaft can be first inserted into the connecting sleeve, and then the crossbar can be radially inserted into the mounting channel.

[0008] According to one aspect of the present application, the guide groove extends in a continuous spiral shape along the axis (L1) of the toothbrush, so that the axial movement of the guide groove can change the circumferential position of the guide protrusion.

[0009] According to one aspect of the present application, the height difference between the starting point and the end point of the guide groove is not less than the maximum stroke of the coupling sleeve. In this way, the axial movement of the coupling sleeve will not be limited by the guide groove.

[0010] According to one aspect of the present application, a fastener is sleeved on one end of the brush head drive shaft away from the brush head connection portion, and the fastener is interference fit with the brush head housing, thereby preventing the brush head drive shaft from shaking inside the brush head housing.

[0011] According to one aspect of the present application, a driving wheel is provided at one end of the brush head driving shaft away from the brush head connecting part; the brush head also includes a brush disc and bristles, and a driven wheel is provided on the side of the brush disc facing away from the bristles; when the driving wheel rotates around the axis (L1) of the toothbrush, the driven wheel rotates around the axis (L2) of the brush disc; wherein the axis (L2) of the brush disc is substantially perpendicular to the axis (L1) of the toothbrush.

[0012] According to one aspect of the present application, the driving wheel and / or the driven wheel is configured as a face gear or a bevel gear, thereby enabling transmission of the gears in different directions.

[0013] According to one aspect of the present application, the brush head further includes a reset spring sleeved on the brush disc, for resetting the brush disc after rotation.

[0014] According to one aspect of the present application, the brush head further comprises a brush disc, and the brush disc follows the rotation and reciprocation of the brush head driving shaft around the axis (L1) of the toothbrush, thereby the brush head can achieve sweeping vibration.

[0015] According to one aspect of the present application, the toothbrush also includes a motor having a motor shaft, and the motor shaft is constructed to perform complete rotational motion; the motor shaft includes an extension portion, and the extension portion has a first eccentric shaft unit and a second eccentric shaft unit arranged relatively to each other; the handle drive shaft includes an axis base movably sleeved on the top of the extension portion, and the axis base is constructed to be connected to the first eccentric shaft unit and the second eccentric shaft unit respectively through a first arm section and a second arm section; when the motor shaft performs rotational motion, the handle drive shaft performs linear reciprocating motion along the axis (L1) of the toothbrush.

[0016] According to one aspect of the present application, the extension portion further includes a first crossbeam and a second crossbeam perpendicular to the motor shaft; the first crossbeam has a first proximal end coupled to the first eccentric shaft unit and a first distal end attached to the first arm section, and the second crossbeam has a second proximal end coupled to the second eccentric shaft unit and a second distal end attached to the first arm section; the radial distance between the first distal end and the second distal end changes periodically and reciprocally. Thus, the position of the shaft base in the direction of the axis (L1) of the toothbrush can be changed.

[0017] According to one aspect of the present application, the first arm segment and the second arm segment are at least partially made of metal or plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will also be explained in more detail with the aid of the following drawings. These are to be understood as being by way of example only and are not intended to limit the present application to the examples of the embodiments shown.

[0019] Figure 1 A cross-sectional view of a toothbrush according to a preferred embodiment of the present application is shown;

[0020] Figure 2 Shows Figure 1 A cross-sectional view of the middle brush head portion;

[0021] Figure 3 An exploded view of the internal structure of the brush head is shown;

[0022] Figure 4 A schematic diagram showing the internal structure of the handle.

[0023] Reference numerals list

[0024] 1 Brush Head

[0025] 10 Brush head housing

[0026] 11 Brush head drive shaft

[0027] 111 Guide protrusion

[0028] 112 Crossbar

[0029] 113 Installation channel

[0030] 114 Fasteners

[0031] 115 Driving wheel

[0032] 12 Brush head connection

[0033] 121 Connecting sleeve

[0034] 122 Guide groove

[0035] 13. Brush the plate

[0036] 131 driven wheel

[0037] 2 Handles

[0038] 21 Handle drive shaft

[0039] 210 Axis base

[0040] 211 First arm section

[0041] 212 Second arm section

[0042] 3 Motor

[0043] 31 Motor shaft

[0044] 310 Extension

[0045] 311 First eccentric shaft unit

[0046] 312 Second eccentric shaft unit

[0047] 313 First beam

[0048] 313a First proximal end

[0049] 313b First Distal

[0050] 314 Second beam

[0051] 314a Second proximal end

[0052] 314b Second remote end DETAILED DESCRIPTION

[0053] The present application is further explained below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present application. However, the present application can obviously be implemented in a variety of other ways different from this description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present application. Therefore, the scope of protection of the present application should not be limited by the content of this specific embodiment.

[0054] Figure 1 A cross-sectional view of a toothbrush according to a preferred embodiment of the present application is shown. Figure 2 Shows Figure 1 Cross-sectional view of the middle brush head. Figure 3 An exploded view of the brush head portion is shown.

[0055] like Figure 1The toothbrush shown comprises a brush head 1 and a handle 2, wherein the brush head 1 comprises a brush head shell 10 detachably connected to the handle 2, the handle 2 comprises a handle drive shaft 21, and the interior of the brush head shell 10 is provided with a brush head drive shaft 11 and a brush head connector 12 connecting the handle drive shaft 21 and the brush head drive shaft 11.

[0056] The brush head connector 12 is fixedly connected to the handle drive shaft 21, and follows the handle drive shaft 21 to move along the axis (L1) of the toothbrush to perform linear reciprocating motion. The axis (L1) of the toothbrush refers to the axis along the extension direction of the toothbrush. For example, when the toothbrush stands, the direction of the axis (L1) is its height direction. Optionally, the motor inside the handle 2 performs linear reciprocating motion, thereby driving the handle drive shaft 21 to perform the same motion; optionally, the motor inside the handle 2 performs nonlinear motion, but is converted into linear reciprocating motion of the handle drive shaft 21 through a specific structure.

[0057] The brush head drive shaft 11 and the brush head connector 12 cooperate with each other to convert the linear reciprocating motion of the brush head connector 12 into the rotational reciprocating motion of the brush head drive shaft 11 around the axis (L1) of the toothbrush. Therefore, even if the motion transmitted from the handle drive shaft 21 to the inside of the brush head 1 is in a linear state, it can be converted into the rotational motion of the brush head drive shaft 11, which provides the possibility of applying a motor with linear output or other output forms to a reciprocating rotating brush head, and increases the versatility of the motor.

[0058] The following examples will further illustrate the principles and applications of this application.

[0059] According to an exemplary embodiment of the present application, Figures 1 to 3 As shown, the brush head connecting member 12 includes a connecting sleeve 121 into which the brush head driving shaft 11 can be inserted, and the outer wall of the brush head driving shaft 11 is provided with a guide protrusion 111, and the connecting sleeve 121 is provided with a guide groove 122 which slides with the guide protrusion 111, so that when the connecting sleeve 121 moves along the axis (L1) of the toothbrush, the guide protrusion 111 rotates around the axis (L1) of the toothbrush under the push of the side wall of the guide groove 122, and the brush head driving shaft 11 also rotates thereby.

[0060] Here Figure 2 For example, the coupling sleeve 121 includes a first position ( Figure 2 a) and second position ( Figure 2 b) When the coupling sleeve 121 moves from the first position to the second position, the guide protrusion 111 rotates around the axis (L1) of the toothbrush at a certain angle. It can be foreseen that when the coupling sleeve 121 returns to the first position, the guide protrusion 111 will also be reset.

[0061] Regarding how to insert the brush head drive shaft 11 with the guide protrusion 111 into the connecting sleeve 121, further, as Figure 3 As shown, the brush head drive shaft 11 includes a cross bar 112 and a mounting channel 113 formed radially through the cross bar 112 for insertion, and the portion of the cross bar 112 outside the mounting channel 113 forms a guide protrusion 111. Therefore, the brush head drive shaft 11 can be first inserted into the connecting sleeve 121, and then the cross bar 112 can be inserted into the mounting channel 113 radially through the guide groove 122. In addition, the guide protrusion 111 also plays a role in avoiding the risk of the brush head drive shaft 11 slipping off the connecting sleeve 121 to a certain extent.

[0062] According to an exemplary embodiment of the present application, Figure 2 As shown, the guide groove 122 extends in a continuous spiral shape along the axis (L1) of the toothbrush, whereby the axial movement of the guide groove 122 can change the circumferential position of the guide protrusion 111.

[0063] According to an exemplary embodiment of the present application, Figure 1 and Figure 2 As shown, a fastener 114 is sleeved on one end of the brush head drive shaft 11 away from the brush head connection part 12, and the fastener 114 is interference fit with the brush head housing 10. Thus, the brush head drive shaft 11 is prevented from shaking inside the brush head housing 10.

[0064] According to an exemplary embodiment of the present application, Figure 3 As shown, a driving wheel 115 is provided at one end of the brush head driving shaft 11 away from the brush head connecting part 12, and the driving wheel 115 rotates with the brush head driving shaft 11. The brush head 1 also includes a brush disc 13 and bristles (not shown). A driven wheel 131 is provided on the side of the brush disc 13 facing away from the bristles. When the driving wheel 115 rotates around the axis (L1) of the toothbrush, the driven wheel 131 rotates around the axis (L2) of the brush disc 13, and the brush disc 13 also rotates. It can be understood that when the rotation direction of the driving wheel 115 changes, the direction of the driven wheel 131 also changes accordingly, thereby realizing the rotational reciprocating motion of the brush disc 13, which will not be repeated here.

[0065] Preferably, the axis (L2) of the brush plate 13 is substantially perpendicular to the axis (L1) of the toothbrush. It should be noted that L1 / L2 in the present application are virtual lines drawn for clarity and do not refer to any actual parts of the toothbrush.

[0066] Furthermore, the driving wheel 115 and / or the driven wheel 131 are constructed as face gears or bevel gears, which can realize transmission of the gears in different directions.

[0067] Furthermore, the brush head 1 further comprises a reset spring (not shown) sleeved on the brush disc 13, for resetting the brush disc 13 after rotation.

[0068] According to an exemplary embodiment of the present application, the brush head 1 adopts another brush disc (not shown), which follows the rotation and reciprocation of the brush head driving shaft 11 around the axis (L1) of the toothbrush, so that the brush head 1 can achieve sweeping vibration.

[0069] Regarding how the handle drive shaft 21 realizes linear reciprocating motion along the axis (L1) of the toothbrush, optional embodiments will be further provided later.

[0070] According to an exemplary embodiment of the present application, the toothbrush further comprises a motor 3 having a motor shaft 31, wherein the motor shaft 31 is configured to perform a complete rotational motion, which is also the most common motor driving mode. The motor shaft 31 comprises an extension portion 310, see Figure 1 The extension portion 310 has a first eccentric shaft unit 311 and a second eccentric shaft unit 312 arranged relatively to each other, specifically, the two eccentric shaft units are eccentric relative to the central virtual extension line of the motor shaft 31, and the two are symmetrical relative to the central virtual extension line of the motor shaft 31.

[0071] The handle drive shaft 21 includes a shaft base 210 movably sleeved on the top of the extension portion 310. The shaft base 210 is constructed to be connected to the first eccentric shaft unit 311 and the second eccentric shaft unit 312 through the first arm section 211 and the second arm section 212 respectively. The specific connection method will be explained in the next embodiment so that when the motor shaft 31 rotates, the handle drive shaft 21 performs linear reciprocating motion along the axis (L1) of the toothbrush.

[0072] Specifically, Figure 4 As shown, the extension portion 310 further includes a first cross beam 313 and a second cross beam 314 which are perpendicular to the motor shaft 31. The first cross beam 313 has a first proximal end 313a coupled to the first eccentric shaft unit 311 and a first distal end 313b attached to the first arm segment 211, and the second cross beam 314 has a second proximal end 314a coupled to the second eccentric shaft unit 312 and a second distal end 314b attached to the first arm segment. Each of the proximal and distal ends is provided with a mounting hole (not shown) for inserting the eccentric shaft unit and the arm segment.

[0073] The radial distance between the first distal end 313b and the second distal end 314b changes periodically. Figure 4 b), the radial distance between the first distal end 313b and the second distal end 314b is the largest, and the shaft base 210 is at the lowest position; when the motor shaft 31 rotates to the second position ( Figure 4 b), the radial distance between the first distal end 313b and the second distal end 314b is the smallest, and the shaft base 210 is at the highest position. Therefore, the handle drive shaft 21 periodically reciprocates between the highest position and the lowest position under the action of the shaft base 210.

[0074] Therefore, in this embodiment, the transmission path is as follows: complete rotational motion of the motor shaft 31 → linear reciprocating motion of the handle drive shaft 21 → rotational reciprocating motion of the brush head drive shaft 11, so that the most commonly used complete rotation motor 3 can be applied to the reciprocating brush head 1, which is conducive to reducing costs.

[0075] According to an exemplary embodiment of the present application, the first arm segment 211 and the second arm segment 212 are at least partially made of metal or plastic, for example, at least partially made by a plastic injection molding process.

[0076] Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application, and any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application shall fall within the scope of protection defined by the claims of the present application.

Claims

1. A toothbrush, characterized in that: The toothbrush comprises a brush head and a handle; The brush head comprises a brush head housing detachably connected to the handle, a brush head drive shaft, and a brush head connector connecting the handle drive shaft and the brush head drive shaft; The brush head connecting member follows the handle driving shaft to make linear reciprocating motion along the axis (L1) of the toothbrush; The brush head drive shaft and the brush head coupling are configured to convert a linear reciprocating motion of the brush head coupling into a rotational reciprocating motion of the brush head drive shaft about an axis (L1) of the toothbrush.

2. The toothbrush according to claim 1, characterized in that: The brush head connecting piece comprises a connecting sleeve into which the brush head driving shaft can be inserted; The outer wall of the brush head driving shaft is provided with a guide protrusion; The connecting sleeve is provided with a guide groove which is slidably matched with the guide protrusion, so that when the connecting sleeve moves along the axis (L1) of the toothbrush, the guide protrusion rotates around the axis (L1) of the toothbrush.

3. The toothbrush according to claim 2, characterized in that: The brush head driving shaft includes a cross bar and a mounting channel formed radially through the cross bar for insertion; The portion of the cross bar located outside the installation channel forms the guide protrusion.

4. The toothbrush according to claim 2, characterized in that Includes at least one of the following features: The guide groove extends in a continuous spiral shape along the axis (L1) of the toothbrush; The height difference between the starting point and the end point of the guide groove is not less than the maximum stroke of the connecting sleeve; A fastener is sleeved on one end of the brush head driving shaft away from the brush head connecting portion, and the fastener is interference fit with the brush head shell.

5. The toothbrush according to claim 4, characterized in that: A driving wheel is provided at one end of the brush head driving shaft away from the brush head connecting portion; The brush head also includes a brush disc and bristles, and a driven wheel is provided on a side of the brush disc facing away from the bristles; When the driving wheel rotates around the axis (L1) of the toothbrush, the driven wheel rotates around the axis (L2) of the brush disc; Wherein, the axis (L2) of the brush disc is substantially perpendicular to the axis (L1) of the toothbrush.

6. The toothbrush according to claim 5, characterized in that Includes at least one of the following features: The driving wheel and / or the driven wheel are configured as face gears or bevel gears; The brush head also includes a reset spring sleeved on the brush disc, which is used to reset the brush disc after rotation.

7. The toothbrush according to claim 4, characterized in that: The brush head also includes a brush plate, which reciprocates following the rotation of the brush head drive shaft around the axis (L1) of the toothbrush.

8. The toothbrush according to claim 1, wherein: The toothbrush also includes a motor having a motor shaft, the motor shaft being configured for complete rotational motion; The motor shaft includes an extension portion having a first eccentric shaft unit and a second eccentric shaft unit arranged opposite to each other; The handle driving shaft comprises a shaft base movably sleeved on the top of the extension portion, and the shaft base is configured to be respectively connected to the first eccentric shaft unit and the second eccentric shaft unit through a first arm section and a second arm section; When the motor shaft performs rotational motion, the handle driving shaft performs linear reciprocating motion along the axis (L1) of the toothbrush.

9. The toothbrush according to claim 8, characterized in that: The extension portion further includes a first beam and a second beam perpendicular to the motor shaft; The first cross beam has a first proximal end coupled to the first eccentric shaft unit and a first distal end attached to the first arm section, and the second cross beam has a second proximal end coupled to the second eccentric shaft unit and a second distal end attached to the first arm section; The radial distance between the first distal end and the second distal end changes periodically and reciprocatingly.

10. The toothbrush according to claim 9, characterized in that: The first arm section and the second arm section are at least partially made of metal or plastic.

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