CN100350884C - Vertical brushing type electric toothbrush - Google Patents

Abstract

The invention discloses a vertical brush type electric toothbrush, comprising a toothbrush handle (2), a toothbrush head (3), a speed change gear set (12), a connecting rod device (8) and a toothbrush head driving pull rod (9). The speed change gear set (12) is provided with an eccentric shaft (122) which can convert its rotational motion into a reciprocating linear motion of the toothbrush head driving pull rod (9); an oblique square column (31) protruding from the back of the toothbrush head (3) passes through a rectangular hole (21) of the toothbrush handle (2) from the bottom to the top, and its upper part extends into an oblique rectangular slot (91) of the head of the toothbrush head driving pull rod (9) in a loose fit; a guide shaft (34) perpendicular to the axis of the toothbrush handle (2) passes through the guide hole (33) and is fixed on the toothbrush handle (2); the toothbrush head (3) can make reciprocating linear motion along the guide shaft (34). The toothbrush bristles of the electric toothbrush of the present invention brush back and forth along the direction of the tooth gaps, so that the dirt between the teeth can be effectively removed and the electric toothbrush complies with the scientific toothbrushing method recommended by dentists.

Description

vertical brush electric toothbrush

technical field

This invention relates to powered cleaning or polishing devices, and more particularly to electric toothbrushes for everyday use.

Background technique

Its toothbrush head majority of existing electric toothbrush adopts the mode of rotating brushing, as disclosed technical scheme of Chinese patent CN 2412546, CN 2080343, they all utilize rotating toothbrush head to clean teeth. There is also an electric toothbrush (CN 2154025Y) that adopts a swinging scrubbing method. It adopts a swing rod to stir the toothbrush head to swing, and the bristles swing back and forth with an arc track to achieve the effect of cleaning teeth. The electric toothbrushes disclosed in U.S. Patent No. 8,778,474 and U.S. 5,504,958 adopt a crankshaft mechanism and a single-row bristle swing mode, but because each row of toothbrush heads is rotatably fixed on an axis, so the single-row bristle is also in the shape of an arc. Orbital oscillating to clean teeth. And the scientific way of brushing teeth should be that the bristles are brushed along the direction between the teeth, that is, vertical brushing. Therefore, the toothbrushing method of the existing electric toothbrush does not fully meet the requirements of scientific toothbrushing, and it is difficult to achieve tooth protection while effectively removing dirt in the teeth spaces. the goal of.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a vertical brush type electric toothbrush in which the bristles of the toothbrush perform linear reciprocating motion perpendicular to the length direction of the toothbrush.

The present invention adopts the following technical solutions: design a vertical brush type electric toothbrush, including: a toothbrush body and a motor in its inner cavity, a gear set, and a toothbrush handle that is movably connected to the top of the toothbrush body, and is arranged on the front section of the toothbrush handle area and the toothbrush head that is movably connected with the brush handle, the gear set is provided with an eccentric mechanism, and the eccentric mechanism converts the rotary motion of the gear set into the reciprocating linear motion of the drive rod of the toothbrush head through a connecting rod device; The back of the toothbrush head is protruded with an oblique square column that transmits power and can change the thrust direction. There is a guide hole on the side of the base of the oblique square column, and the oblique square column passes through the rectangular hole of the toothbrush handle from the bottom up. After that, its upper part extends into the oblique rectangular slot at the head of the toothbrush head driving rod to form a loose fit; the two ends are erected on the toothbrush handle and the guide shaft perpendicular to the axis of the toothbrush handle passes through the guide hole on the back of the toothbrush head, Make the toothbrush head and the guide shaft in a sliding fit.

The motor drives the toothbrush head to drive the pull rod through the transmission gear set and the connecting rod device to make a reciprocating linear motion, and the toothbrush head drives the pull rod to push the oblique square column on the back of the toothbrush head through the oblique rectangular slot hole of the head, so that the toothbrush The head can only move back and forth linearly along the guide shaft, thereby ensuring that the movement direction of the toothbrush head is perpendicular to the axis of the toothbrush handle, and realizing vertical brushing.

The eccentric mechanism is an eccentric shaft protruding from the driven gear of the transmission gear set; the connecting rod device includes: a connecting rod, a connecting head and a pull rod shaft for movably connecting the toothbrush body and the toothbrush handle; the connecting rod The rear end of the rod is connected to the eccentric shaft on the driven gear, and its front end is axially connected to the rear end of the connecting head; the two ends of the pull rod shaft are respectively connected to the front end of the connecting head and the rear end of the toothbrush head driving pull rod Fixed connection. The motor drives the passive gear and the eccentric shaft on it to rotate, and the eccentric shaft pushes and pulls the toothbrush head up and down through the connecting rod, the connecting head and the pull rod shaft to drive the pull rod.

In order to improve the efficiency of brushing teeth, a rotating brush head can also be arranged at the front end of the toothbrush handle, and the rotating brush head is movably connected with the toothbrush handle. Pull-tab, the front end of the pull-tab has a slide hole, the slide hole is a long straight hole with a semicircle closing at the left and right ends, the slide hole is sleeved on the drive shaft; the motor drives the toothbrush head Drive the pull rod and its pull piece to move up and down, and the pull piece pushes the rotating brush head to reciprocate within a certain angle through the drive shaft at the eccentric position on the back of the rotating brush head.

There is a central axis hole on the back of the rotating brush head, and the central axis hole is rotatably matched with the pendant shaft fixed on the toothbrush handle; an arc-shaped neck is arranged on the right side of the rotating brush head away from the center axis hole, and the arc-shaped neck The part and the back of the rotating brush head form an anti-slip groove, and a fan-shaped convex key is arranged on the right side wall of the toothbrush handle. The fan-shaped convex key is placed in the anti-slip groove on the back of the rotating brush head, so that the rotating brush head The hanging state in which the toothbrush handle's pendant shaft rotates within a certain angle.

Compared with the prior art, the vertical brush type electric toothbrush of the present invention has the following beneficial effects: when the toothbrush head of the electric toothbrush is naturally placed in the user's oral cavity, the direction of the reciprocating linear motion of the bristles is consistent with the direction of the gap between the teeth , that is, the bristles of the toothbrush brush back and forth along the direction of the teeth, so it can not only effectively remove the dirt on the surface of the teeth and between the teeth, but also not damage the surface of the teeth, which is in line with the scientific brushing method recommended by dentists.

Description of drawings:

Fig. 1 is a schematic structural view of Embodiment 1 of the present invention;

2 is a structural schematic diagram of the main components of the toothbrush head drive rod 9, the toothbrush head 3, the toothbrush handle 2 and the driven gear 121 in Embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of the assembly of the toothbrush handle and the toothbrush head part of Embodiment 1 of the present invention;

Fig. 4 is a schematic diagram of the toothbrush head and its driving parts moving direction according to Embodiment 1 of the present invention; (a), the eccentric shaft is in the middle, (b), the eccentric shaft is downward, (c), the eccentric shaft is upward;

Fig. 5 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 6 is a schematic diagram of the assembly of the toothbrush handle and the toothbrush head part of the second embodiment of the present invention;

Fig. 7 is a schematic diagram of the toothbrush head and its driving parts moving direction according to the second embodiment of the present invention; (a), the eccentric shaft is in the middle, (b), the eccentric shaft is downward, and (c), the eccentric shaft is upward.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and the embodiments shown in the accompanying drawings.

Embodiment one

As shown in Figure 1, the vertical brush type electric toothbrush of the present invention comprises: the motor 11 that is placed in toothbrush body 1 inner cavity and the speed change gear set 12 that is driven by motor 11, the toothbrush handle 2 that is installed on toothbrush body 1 top and is arranged on The toothbrush head 3 in the front section of the toothbrush handle 2 is movably connected with the toothbrush handle 2 , and the front of the toothbrush head 3 is fixed with toothbrush hairs 31 . Described transmission gear set 12 comprises the driving gear 123 that is fixed on the power output shaft of motor 11 and the driven gear 121, is provided with eccentric shaft 122 (Fig. The rotary motion of the speed change gear set 12 is converted into the reciprocating linear motion of the toothbrush head driving pull rod 9 . The connecting rod device 8 includes a connecting rod 81, a connecting head 82 and a pull rod shaft 83 which are sequentially connected from back to front; The two ends of each are fixedly connected with the front end of the connecting head 82 and the rear end of the toothbrush head drive rod 9 respectively.

FIG. 2 is a structural schematic diagram of the main components of the first embodiment, the toothbrush head driving rod 9 , the toothbrush head 3 , the toothbrush handle 2 and the driven gear 121 . The back side of the toothbrush head 3 is provided with an oblique square column 31 and a square convex key 32 as the base of the oblique square column 31 , and a guide hole 33 perpendicular to the axis of the toothbrush handle 2 is opened on the side wall of the square convex key 32 . The bottom of the toothbrush handle 2 has a rectangular hole 21, and the toothbrush handle 2 has a positioning hole 22 perpendicular to the axis of the toothbrush handle 2 on the side walls of the left and right sides of the rectangular hole 21. The toothbrush head driving pull rod 9 has an oblique rectangular slot 91 on its head, and its inclination angle is consistent with the inclination angle of the oblique square column 31 . The oblique square column 31 passes through the oblong hole 21 of the toothbrush handle 2 upwards from the bottom, and its upper part extends into the oblique rectangular slot 91 on the head of the toothbrush head drive rod 9 to form a loose fit, and the square convex key 32 is inserted into the In the rectangular hole 21 of the toothbrush handle 2, the width of the square convex key 32 should be slightly smaller than the width of the rectangular hole 21, and its length plus the vibration amplitude of the toothbrush head 3 should be slightly smaller than the length of the rectangular hole 21. One two ends are fixed on the positioning holes 22 on both sides of the toothbrush handle 2 and the guide shaft 34 perpendicular to the axis of the toothbrush handle 2 passes through the guide hole 33 on the back side of the toothbrush head 3 to slide with the toothbrush head 3, and the toothbrush head 3 can slide along the guide The shaft 34 slides flexibly (FIG. 3).

As shown in FIG. 1 , the middle and rear part of the toothbrush handle 2 is fixed with a tube position sleeve 5 for preventing the pull rod shaft 83 from deviating from the central axis, and the pull rod shaft 83 passes through the tube position sleeve 5 and is slidably engaged with it.

As shown in Figures 1 and 3, the toothbrush handle 2 is composed of a toothbrush handle front cover 23 and a toothbrush handle rear cover 24. The toothbrush handle 2 is hollow along the axis. 5 and connector 82 are placed therein.

The rear portion of the toothbrush body 1 is provided with a battery chamber 17, and the battery pack 18 in the battery chamber 17 is electrically connected to the motor 11, and the control switch of the motor 11 is arranged on the outer wall of the toothbrush body 1.

When the control switch of the motor 11 is pressed, the motor 11 drives the toothbrush head to drive the pull rod 9 to make a reciprocating linear motion through the speed change gear set 12 and the connecting rod device 8. Push the oblique square column 31 on the back of the toothbrush head 3 to make the toothbrush head 3 perform high-speed reciprocating linear motion along the guide shaft 34, as shown in FIG. 4 . When the eccentric shaft 122 on the driven gear 121 was in the middle position, the toothbrush head driving pull rod 9 pushed the toothbrush head 3 to the center position (Fig. 4a); when the eccentric shaft 122 on the driven gear 121 moved downward, the toothbrush head Drive pull bar 9 also moves downwards, promotes toothbrush head 3 to move to the left (Fig. 4b); Figure 4c). The speed change gear set 12 constantly rotates, so that the eccentric shaft 122 on the driven gear 121 constantly moves up and down, and the toothbrush head drive pull bar 9 also moves up and down, pushing the toothbrush head 3 to vibrate rapidly left and right.

Embodiment two

The difference between this embodiment and the first embodiment is that a circular rotating brush head 4 is added at the front end of the toothbrush handle 2 to improve brushing efficiency. As shown in Figures 5 and 6, the rotating brush head 4 has a central axis hole 41 The central axis hole 41 is rotatably matched with the hanging shaft 27 fixed on the toothbrush handle 2, a driving shaft 42 is vertically protruded on the left side of the central axis hole 41, and a section of arc-shaped neck is arranged on the right side of the central axis hole 41. The arc-shaped neck and the back of the rotating brush head 4 form an anti-slip groove 44. Correspondingly, the front end of the toothbrush handle 2 has a circular through hole 25, and a fan-shaped convex key 26 is protruded on its right side wall. The brush head 4 is suspended on the toothbrush handle 2 and can rotate within a certain angle around the toothbrush handle 2 hanging shaft 27 . A pull piece 92 is extended on the left side of the front end of the toothbrush head driving pull rod 9, and the front end of the pull piece 92 has a sliding hole 921 socketed on the drive shaft 42, and the left and right ends of the sliding hole 921 are semicircular closed. The elongated straight hole, its longitudinal aperture is slightly larger than the diameter of the drive shaft 42 of the rotating brush head 4 . The motor 11 drives the toothbrush head to drive the pull rod 9 and its pull piece 92 to move up and down, and the hole wall of the sliding hole 921 drives the eccentric drive shaft 42 of the rotating brush head 4 to drive the rotating brush head 4 with the fixed shaft as the axis. Reciprocating rotation within a certain angle. When the eccentric shaft 122 on the passive gear 121 was in the middle position, the toothbrush head 3 and the rotating brush head 4 were pushed to the center position by the toothbrush head driving pull rod 9 and the side wall of the sliding hole 921 at the front end of the pull piece 92 (Fig. 7a ); when the eccentric shaft 122 on the driven gear 121 moves downward, the toothbrush head drives the pull rod 9 and the sliding hole 921 at the front end also moves downward, pushing the toothbrush head 3 to move to the left, while the side wall of the sliding hole 921 drives the rotating brush The head 4 rotates counterclockwise (Fig. 7b); when the eccentric shaft 122 on the driven gear 121 moves upward, the toothbrush head driving rod 9 and the sliding hole 921 at the front end also move upward, pushing the toothbrush head 3 to move to the right, while the sliding hole 921 The side wall of the rotating brush head 4 is driven to rotate clockwise (Fig. 7c). Therefore, the motor 11 drives the toothbrush head to drive the pull rod 9 to move up and down, and the side wall of the left sliding hole 921 at the front end of the toothbrush head drives the pull rod 9 to drive the rotating brush head 4 to rotate reciprocatingly within a certain angle with the fixed shaft as the axis. Its trajectory is a section of arc.

Claims (10)

1. A vertical brush type electric toothbrush, comprising: a toothbrush body (1) and a motor (11) in its inner cavity, a transmission gear set (12), and a toothbrush handle (2) that is movably connected to the top of the toothbrush body (1) , a toothbrush head (3) arranged in the front section of the toothbrush handle (2) and movably connected with the brush handle (2), characterized in that: Described speed change gear set (12) is provided with eccentric mechanism, and this eccentric mechanism converts the rotary motion of described speed change gear set (12) into the reciprocating linear motion of toothbrush head driving pull rod (9) through connecting rod device (8); The back side of the toothbrush head (3) is provided with an oblique square column (31) that transmits power and can change the thrust direction. There is a guide hole (33) on the base side of the oblique square column (31). After the column (31) passes through the rectangular hole (21) of the toothbrush handle (2) from the bottom upwards, its upper part stretches into the oblique rectangular slot (91) of the head of the toothbrush head driving rod (9) to form a loose fit; Two ends are erected on the toothbrush handle (2) and the guide shaft (34) perpendicular to the axial direction of the toothbrush handle (2) passes through the guide hole (33) on the back side of the toothbrush head (3), so that the toothbrush head (3) and The guide shaft (34) is a sliding fit; The motor (11) drives the toothbrush head to drive the pull rod (9) to make a reciprocating linear motion through the transmission gear set (12) and the connecting rod device (8), and the toothbrush head drives the pull rod (9) to pass through the oblique rectangular groove of the head The hole (91) promotes the oblique square post (31) on the back side of the toothbrush head (3), so that the toothbrush head (3) makes a reciprocating linear motion perpendicular to the axis of the toothbrush handle (2) along the guide shaft (34). 2. The vertical brush electric toothbrush according to claim 1, characterized in that: the eccentric mechanism is an eccentric shaft (122) protruding from the driven gear (121) of the transmission gear set (12); The connecting rod device (8) includes: connecting rod (81), a connecting head (82) and a pull rod shaft (83) for movably connecting the toothbrush body (1) and the toothbrush handle (2); the connecting rod (81) The rear end is axially connected with the eccentric shaft (122) on the driven gear (121), and its front end is axially connected with the rear end of the connector (82); the two ends of the pull rod shaft (83) are respectively connected with the connector ( 82) is fixedly connected with the rear end of the toothbrush head driving pull bar (9). 3. The vertical brush electric toothbrush according to claim 1, characterized in that: the base of the oblique square column (31) on the back of the toothbrush head (3) is a square convex key (32), and the square convex key ( 32) Put it in the rectangular hole (21) of the toothbrush handle (2); the width of the square convex key (32) is slightly smaller than the width of the rectangular hole (21), and its length plus the vibration amplitude of the toothbrush head (3) Slightly less than the length of the rectangular hole (21). 4. The vertical brush electric toothbrush according to claim 2, characterized in that: the middle and rear part of the toothbrush handle (2) is provided with a tube position sleeve (5) for preventing the rod shaft (83) from deviating from the central axis, so The pull rod shaft (83) passes through the pipe position sleeve (5) and is slidably fitted therewith. 5. The vertical brush electric toothbrush according to claim 4, characterized in that: the toothbrush handle (2) is composed of a toothbrush handle front cover (23) and a toothbrush handle rear cover (24), and the toothbrush handle (2) is The axis is hollow, and the pull rod shaft (83), the toothbrush head driving pull rod (9), the pipe position sleeve (5) and the connecting head (82) are placed therein. 6. The vertical brush electric toothbrush according to any one of claims 1 to 5, characterized in that it also includes a rotating brush head (4) arranged at the front end of the toothbrush handle (2), and the rotating brush head (4) is connected with the toothbrush The handle (2) is rotatably connected, and a drive shaft (42) protrudes vertically on the left side of the back side; A sliding hole (921) is socketed on the drive shaft (42); the motor (11) drives the toothbrush head to drive the pull rod (9) and its pull piece (92) to move up and down, and the pull piece (92) passes through the rotating brush The drive shaft (42) at the eccentric position on the back of the head (4) pushes the rotating brush head (4) to rotate back and forth within a certain angle. 7. The vertical brush electric toothbrush according to claim 6, characterized in that: there is a central shaft hole (41) on the back of the rotating brush head (4), and the central shaft hole (41) is fixed to the toothbrush handle ( 2) the sagging axis (27) rotates and cooperates; the back side of the rotating brush head (4) is deviated from the central shaft hole (41) and the right side is provided with a section of arc-shaped neck, which is surrounded by the back of the rotating brush head (4). An anti-slip groove (44), a fan-shaped convex key (26) is arranged on the right side wall of the toothbrush handle (2), and the sector-shaped convex key (26) is placed in the anti-slip groove on the back of the rotating brush head (4) In (44), make the rotating brush head (4) be in the suspended state that rotates in a certain angle around the toothbrush handle (2) pendent shaft (27). 8. The vertical brush electric toothbrush according to claim 6, characterized in that: the rotating brush head (4) is a circular brush head. 9. The vertical brush type electric toothbrush according to claim 6, characterized in that: the sliding hole (921) is a long straight hole with semicircular ends at the left and right ends, and its longitudinal aperture is slightly larger than that of the rotating toothbrush. The diameter of the brush head (4) drive shaft (42). 10. The vertical brush electric toothbrush according to any one of claims 1 to 5, characterized in that: a battery chamber (17) is provided at the rear of the toothbrush body (1), and the batteries in the battery chamber (17) The group (18) is electrically connected with the motor (11), and the control switch of the motor (11) is arranged on the outer wall of the toothbrush body (1).

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