CN211633691U - Double-bristle U-shaped toothbrush - Google Patents

Abstract

The utility model relates to a double-bristle U-shaped toothbrush, which comprises a tooth washing body, an operation body, a motor chamber, a switch component and a control device; the tooth washing body is in a U shape matched with a dental arch; the middle part of the closed end of the tooth washing body is opened and provided with an accommodating cavity; the upper end surface and the lower end surface of the tooth washing body are both vertically provided with U-shaped tooth washing grooves along the U-shaped tooth washing body; vertical bristles are uniformly fixed on the bottom surface of the tooth washing groove, and scraping blades are fixed on the inner wall and the outer wall of the lip side wall on the outer side of the tooth washing groove and the inner wall of the tongue side wall on the inner side of the tooth washing groove; the tail end of the tooth washing groove is provided with a U-shaped groove; bristles are fixed on the inner side wall of the U-shaped groove; conical bristles far away from the bottom surface of the tooth washing groove are obliquely fixed on the inner wall of the side wall of the lip at intervals; the operation body is hollow inside; the operation body comprises an operation end and a connecting end fixed with the operation end; the upper part of the operating end is provided with a button hole for accommodating the switch assembly.

Description

Double-bristle U-shaped toothbrush

Technical Field

The utility model relates to a double-bristle U-shaped toothbrush, which belongs to the technical field of oral cavity cleaning and nursing appliances.

Background

Teeth are the hardest organs of the human body. Generally, teeth are white in color and hard in texture. Teeth are suitable for many applications such as tearing and grinding food. The clean and healthy teeth are closely related to human speech pronunciation, social activities and the like.

The form and function of electric toothbrushes also gradually evolve with the different needs of humans.

The patent of the Chinese utility model with the publication number of CN209236438U discloses a split type tooth washing device, which comprises a tooth washing body placed in the oral cavity and an operation body used for holding by hands, wherein the tooth washing body is arc-shaped and matched with dental arch, the arc-shaped tooth washing body is provided with an open end and a closed end, the upper side and the lower side of the tooth washing body are respectively provided with a tooth washing groove which is used for accommodating teeth and extends along the arc length direction of the tooth washing body, brush hairs are uniformly arranged on the inner wall of the labial side, the inner wall of the lingual side and the inner wall of the bottom side of the tooth washing groove, a connector is connected between the outer walls of the lingual sides of the tooth washing body, and the connector is hollow to form an; an insertion channel is arranged in the tooth washing body; the insertion channel extends to the accommodating cavity from the middle part of the outer side of the closed end of the tooth washing body; one end of the operating body is provided with a control device, and the other end of the operating body is provided with a vibration device; the vibration device is detachably inserted into the accommodating cavity through the insertion channel; the split type tooth washing device can remarkably improve the utilization rate of the tooth washing device, reduce the use cost and the maintenance cost and improve the applicability of the split type tooth washing device.

However, the tail end of the electric tooth washing device along the arc length direction of the tooth washing body is easy to directly push the wisdom teeth, and the wisdom teeth cannot be washed; meanwhile, the flexible cladding is not provided with a mechanism clamped with the insertion channel on the basis of being capable of being detached and separated, so that the unnecessary anti-falling function of the flexible cladding is realized, and the hidden trouble that the tooth washing body is separated from the operation body in the use process exists.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems, the utility model provides a double-bristle U-shaped toothbrush, the tail end of which is provided with a U-shaped groove which can scrub wisdom teeth, and is provided with conical bristles which can scrub the surface of teeth well; the motor bin is arranged in a T shape, and is fixed with the operation body through the motor limiting block, so that the unnecessary separation of the operation body and the tooth washing body can be prevented.

The technical scheme of the utility model as follows:

a double-bristle U-shaped toothbrush comprises a tooth washing body, an operating body, a motor chamber, a switch assembly and a control device; the tooth washing body is in a U shape matched with a dental arch; the middle part of the closed end of the tooth washing body is opened and provided with an accommodating cavity; the upper end surface and the lower end surface of the tooth washing body are both vertically provided with U-shaped tooth washing grooves along the U-shaped tooth washing body; vertical bristles are uniformly fixed on the bottom surface of the tooth washing groove, and scraping blades are fixed on the inner wall and the outer wall of the lip side wall on the outer side of the tooth washing groove and the inner wall of the tongue side wall on the inner side of the tooth washing groove; the tail end of the tooth washing groove is provided with a U-shaped groove; bristles are fixed on the inner side wall of the U-shaped groove; conical bristles far away from the bottom surface of the tooth washing groove are obliquely fixed on the inner wall of the side wall of the lip at intervals; the operation body is hollow inside; the operation body comprises an operation end and a connecting end fixed with the operation end; a button hole for accommodating the switch assembly is formed in the upper part of the operating end; the front end of the connecting end is inserted into the hollow motor bin in the accommodating cavity and covered at the front end of the connecting end; the control device comprises a vibrating motor sleeved in the motor bin, and a control chip and a battery which are arranged in the operating end and positioned below the switch assembly; the control chip is respectively connected with the battery and the vibration motor through electric signals; and a switch button is arranged on the control chip.

Further, the motor cabin is in a T shape; the inner wall of the accommodating cavity is attached to the outer wall of the motor cabin; the vibration motor is arranged in the transverse part of the T-shaped motor bin, and the vertical part of the T-shaped motor bin covers the front end of the connecting end; the height of the transverse part is greater than that of the vertical part.

Further, the device also comprises a motor limiting block; the motor limiting block is sleeved on the inner side of the front end of the connecting end; positioning lugs are vertically fixed on the upper end face and the lower end face of the motor limiting block; the motor bin is provided with an avoidance groove which is vertically communicated; a clamping groove is formed in the inner side wall of the front end of the connecting end; the positioning lug is clamped in the clamping groove after passing through the avoiding groove, and the operation body, the motor bin and the motor limiting block are fixed.

Furthermore, a baffle is fixed on the inner side wall of the front end of the connecting end; a cover plate is fixed at the end part of one end of the motor limiting block, which is far away from the motor cabin; the baffle is positioned between the cover plate and the motor bin; the baffle is attached to the end face of the cover plate; a limiting column is fixed on the inner wall of the tail end of the vertical part of the T-shaped motor bin; the lower end of the motor limiting block is provided with a limiting groove used for accommodating the limiting column.

Further, the switch assembly sequentially comprises a pressing piece, a button rubber sleeve and a button fastener from top to bottom; the pressing piece is sleeved in the button hole and arranged in the middle of the basin-shaped button rubber sleeve; the caliber of the side wall of the basin-shaped button rubber sleeve is larger than that of the button hole; a fixing ring fixed with the lower end of the inner side of the operating end is arranged on the outer side of the button hole; a plurality of clamping convex blocks are fixed on the outer peripheral surface of the upper end of the hollow cylindrical button fastener; the button fastener is fixed on the inner side of the upper end of the fixing ring through the clamping of the clamping convex block, and the button rubber sleeve is fixed at the lower end of the inner side of the operation end in a pressing mode.

Further, the operating body further comprises a middle flange which is arranged to protrude outwards; the middle flange is located between the operating end and the connecting end; the middle part of the closed end of the tooth washing body is also provided with a containing groove for containing the middle flange; the holding tank with hold the chamber end intercommunication.

Further, the operating body is divided into an upper shell and a lower shell which are covered up and down; the button hole is arranged on the upper shell; the control device is arranged in the lower shell; a lower shell flange is fixed at the upper end of the outer wall of the lower shell; the outer wall of the lower shell flange is attached to the inner side wall surface of the lower part of the upper shell.

Furthermore, the middle part of the connecting end is inwards contracted along the operating end to form a contracted part; the middle part of the accommodating cavity is provided with a reverse inclined plane which is attached to the outer wall surface of the contraction part.

Furthermore, a motor flange is also arranged on the outer side wall surface of the T-shaped motor bin vertical part; the motor flange is pressed against the inner wall surface of the connecting end.

Furthermore, a rubber sleeve convex edge is annularly fixed at the upper end of the button rubber sleeve; the convex edge of the rubber sleeve tightly presses the lower end face of the inner part of the operation end.

The utility model discloses following beneficial effect has:

1. this two hair U type toothbrush end sets up the U type groove that can scrub wisdom tooth, is provided with the toper hair simultaneously, can carry out good scrubbing to the tooth surface.

2. The surfaces of teeth can be cleaned through the scraping blades and the bristles; the tapered bristles can remove the objects in the slits between the teeth, and the three brushes act together to achieve a good brushing effect on the oral cavity and the teeth of a human body.

3. The motor bin is arranged in a T shape, and is fixed with the operation body through the motor limiting block, so that the unnecessary falling off of the operation body and the tooth washing body can be prevented.

4. Set up in flange and holding tank, can improve water-proof effects on the one hand, on the other hand also can improve the anticreep effect.

5. The contraction part and the reverse inclined plane are arranged, and the anti-falling effect can be improved.

6. Through setting up protruding edge of inferior valve flange, motor flange and gum cover, can improve the water-proof effects of whole toothbrush.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a cross-sectional view taken at a-a of fig. 2.

Fig. 4 is a partially enlarged view of fig. 3 at B.

Fig. 5 is a partially enlarged view of fig. 3 at C.

Fig. 6 is a partially enlarged view of fig. 3 at D.

Fig. 7 is a schematic view showing an internal structure of the tooth-washing body.

Fig. 8 is a schematic view of the internal structure of the operation body.

Fig. 9 is an exploded view of the operating body.

Fig. 10 is a schematic structural diagram of a motor chamber and a motor stopper.

The reference numbers in the figures denote:

1. washing the teeth; 11. an accommodating chamber; 12. a reverse slope; 13. accommodating grooves; 2. washing tooth sockets; 21. a labial sidewall; 22. a lingual sidewall; 23. a U-shaped groove; 24. scraping a blade; 25. brushing; 26. tapered hair; 3. an operation body; 31. an operation end; 32. a middle flange; 33. a connecting end; 34. a button hole; 35. a fixing ring; 36. a lower shell flange; 37. a clamping groove; 38. a baffle plate; 4. a motor compartment; 41. a limiting column; 42. an avoidance groove; 43. a motor flange; 5. a motor stopper; 51. a cover plate; 52. positioning the bump; 53. a limiting groove; 6. a switch assembly; 61. a pressing member; 62. a button rubber sleeve; 63. a button fastener; 64. clamping the convex block; 65. a convex edge of the rubber sleeve; 7. a control device; 71. a vibration motor; 72. a battery; 73. a control chip; 74. and a button is switched on and off.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Preferably, the tooth washing body 1, the motor chamber 4 and the button rubber sleeve 62 are made of silica gel, and the operation body 3, the motor limiting block 5, the pressing piece 61 and the button fastener 63 are made of hard plastic.

Referring to fig. 1 to 10, a double-bristle U-shaped toothbrush includes a tooth washing body 1, an operating body 3, a motor chamber 4, a switch assembly 6, and a control device 7; the tooth washing body 1 is in a U shape matched with a dental arch; the middle part of the closed end of the tooth washing body 1 is opened and provided with an accommodating cavity 11; the upper end surface and the lower end surface of the tooth washing body 1 are both vertically provided with a U-shaped tooth washing groove 2 along the U-shaped tooth washing body 1; vertical bristles 25 are uniformly fixed on the bottom surface of the tooth washing groove 2, and scraping blades 24 are fixed on the inner wall and the outer wall of the lip side wall 21 on the outer side of the tooth washing groove 2 and the inner wall of the tongue side wall 22 on the inner side of the tooth washing groove 2; the tail end of the tooth washing groove 2 is provided with a U-shaped groove 23; bristles 25 are fixed on the inner side wall of the U-shaped groove 23; tapered bristles 26 far away from the bottom surface of the tooth washing groove 2 are obliquely fixed on the inner wall of the labial wall 21 at intervals (preferably, the tapered bristles 26 are arranged at the positions of incisors and wisdom teeth); the operation body 3 is hollow inside; the operating body 3 comprises an operating end 31 and a connecting end 33 fixed with the operating end 31; a button hole 34 for accommodating the switch assembly 6 is formed in the upper part of the operating end 31; the front end of the connecting end 33 is inserted into the hollow motor chamber 4 in the accommodating cavity 11 and covers the front end of the connecting end 33; the control device 7 comprises a vibration motor 71 sleeved in the motor chamber 4, and a control chip 73 and a battery 72 which are arranged in the operation end 31 and are positioned below the switch component 6; the control chip 73 is respectively connected with the battery 72 and the vibration motor 71 through electric signals; the control chip 73 is provided with a switch button 74.

In the above embodiment, when the double-bristle U-shaped toothbrush is put into the mouth, the bristles 25 and the wiper 24 inside the tooth cleaning groove 2 of the U-shaped tooth cleaning body 1 matched with the dental arch can be attached to the teeth during occlusion, so as to clean the surfaces of the teeth; the scraping blade 24 on the outer wall of the lip side wall 21 at the outer side of the tooth washing groove 2 can brush the inner side surface of the lip, thereby improving the brushing range of the tooth washing device. The inner wall of the lip side wall 21, the middle part and the two ends of which are close to the U-shaped groove 23 are fixed with the tapered hair 26 which is far away from the bottom surface of the tooth washing groove 2 in an inclined manner, and the main brushing of incisors and wisdom teeth can remove the objects mixed in the tooth gaps by the aid of the characteristics of the tapered hair 26 in thickness and fineness. The vibration motor 71 is arranged in the motor chamber 4, and the press switch assembly 6 can control the operation of the vibration motor 71 and adjust the vibration frequency through the switch button 74 and the control chip 73. Through doctor-bar 24, brush hair 25, can wash the tooth surface, and the thing in the slit between the teeth can be rejected to toper hair 26, and three kinds of brushes coact together can play good scrubbing effect to people's oral cavity and tooth. The tapered bristles 26 and the scraping blade 24 are arranged on the U-shaped groove 23 at intervals, so that when an operator brushes teeth, the operator can swing the toothbrush by holding the toothbrush, and a more thorough cleaning effect is achieved. Meanwhile, the vibration motor 71 is placed in the motor chamber 4 made of silica gel, so that the vibration motor 71 can not generate large noise in the silica gel, but can better transmit the force of sound waves, so that the tooth washing body 1 made of silica gel has larger sound wave transmission force, and the teeth can be cleaned conveniently; and because the motor chamber 4 is not hard plastic, the vibration force can not be transmitted to the handle, the wrist of the user can not generate uncomfortable feeling due to the vibration, and the comfort level of the user when using the toothbrush is improved.

Further, the motor chamber 4 is in a T shape; the inner wall of the accommodating cavity 11 is attached to the outer wall of the motor cabin 4; the vibration motor 71 is arranged in the transverse part of the T-shaped motor bin 4, and the vertical part of the T-shaped motor bin 4 covers the front end of the connecting end 33; the height of the transverse part is greater than that of the vertical part. The motor storehouse 4 of T font with hold the chamber 11 cooperation, insert at motor storehouse 4 and hold the chamber 11 back, the horizontal part of the motor storehouse 4 of T font is greater than perpendicular portion, has formed a big support block structure, then holds the chamber 11 and can firmly fix motor storehouse 4, prevent that it from droing.

Further, the device also comprises a motor limit block 5; the motor limiting block 5 is sleeved on the inner side of the front end of the connecting end 33; the upper end face and the lower end face of the motor limiting block 5 are both vertically fixed with a positioning lug 52; the motor bin 4 is provided with an avoidance groove 42 which is vertically communicated; a clamping groove 37 is formed in the inner side wall of the front end of the connecting end 33; the positioning projection 52 passes through the escape groove 42 and then engages with the engaging groove 37, thereby fixing the operating body 3, the motor compartment 4, and the motor stopper 5. Through increasing motor stopper 5, can play good fixed effect to motor storehouse 4, prevent effectively that motor storehouse 4 from droing from connecting end 33 front end.

Further, a baffle 38 is fixed on the inner side wall of the front end of the connecting end 33; a cover plate 51 is fixed at the end part of one end of the motor limiting block 5, which is far away from the motor cabin 4; the baffle 38 is located between the cover plate 51 and the motor compartment 4; the baffle 38 is attached to the end face of the cover plate 51; a limiting column 41 is fixed on the inner wall of the tail end of the vertical part of the T-shaped motor chamber 4; the lower end of the motor limiting block 5 is provided with a limiting groove 53 for accommodating the limiting column 41. The cover plate 51 and the baffle 38 are arranged, so that the motor limit block 5 arranged in the front end of the connecting end 33 can be prevented from falling off along with the motor cabin 4; the arrangement of the spacing columns 41 and the spacing grooves 53 plays a role in guiding the motor spacing blocks 5 and the motor cabin 4 on the one hand, and on the other hand, the spacing columns 41 are used for preventing water.

Further, the switch assembly 6 comprises a pressing member 61, a button rubber sleeve 62 and a button fastener 63 in sequence from top to bottom; the pressing piece 61 is sleeved in the button hole 34 and arranged in the middle of the basin-shaped button rubber sleeve 62; the caliber of the side wall of the basin-shaped button rubber sleeve 62 is larger than that of the button hole 34; a fixing ring 35 fixed with the lower end of the inner side of the operating end 31 is arranged on the outer side of the button hole 34; a plurality of clamping convex blocks 64 are fixed on the outer peripheral surface of the upper end of the hollow cylindrical button fastener 63; the button fastener 63 is fixed on the inner side of the upper end of the fixing ring 35 by the fastening projection 64, and the button rubber sleeve 62 is fixed on the lower end of the inner side of the operation end 31 by pressing. By pressing the pressing member 61, the button rubber sleeve 62 below the pressing member 61 contacts the switch button 74, and the on/off and vibration frequency of the vibration motor 71 are controlled by the control chip 73.

Further, the operating body 3 further comprises a middle flange 32 protruding outwards; the middle flange 32 is located between the operating end 31 and the connecting end 33; the middle part of the closed end of the tooth washing body 1 is also provided with a containing groove 13 for containing the middle flange 32; the accommodating groove 13 is communicated with the end of the accommodating cavity 11. The outlet at the tail end of the accommodating cavity 11 is blocked by the middle flange 32, on one hand, the middle flange 32 and the accommodating groove 13 can play a role in clamping, so that the operation body 3 is prevented from being separated from the tooth washing body 1, and on the other hand, the middle flange 32 and the accommodating groove 13 are matched to play a role in water prevention.

Further, the operating body 3 is divided into an upper shell and a lower shell which are covered up and down; the button hole 34 is provided on the upper case; the control device 7 is arranged in the lower shell; a lower shell flange 36 is fixed at the upper end of the outer wall of the lower shell; the outer wall of the lower shell flange 36 is attached to the inner side wall surface of the lower part of the upper shell. The operation body 3 is split into an upper shell and a lower shell, which is beneficial to the installation of all parts in the operation body 3; in addition, the lower shell flange 36 on the lower shell serves primarily as a waterproof.

Further, the middle part of the connecting end 33 is contracted inwards along the operating end 31 to form a contracted part; and a reverse inclined surface 12 attached to the outer wall surface of the contraction part is arranged in the middle of the accommodating cavity 11. The contraction part and the reverse inclined surface 12 can achieve a good coating effect on the connecting end 33, and the connecting end 33 is prevented from being separated from the accommodating cavity 11.

Further, a motor flange 43 is arranged on the outer side wall surface of the vertical part of the T-shaped motor chamber 4; the motor flange 43 is pressed against the inner wall surface of the connection end 33. The motor flange 43 is pressed against the inner wall surface of the connecting end 33, so that the waterproof effect can be improved.

Further, a rubber sleeve convex edge 65 is annularly fixed at the upper end of the button rubber sleeve 62; the rubber sleeve flange 65 is tightly pressed on the inner lower end face of the operation end 31. The rubber sleeve convex edge 65 tightly presses the inner lower end face of the operation end 31, so that the waterproof effect can be improved.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A double-bristle U-shaped toothbrush is characterized in that: comprises a tooth washing body (1), an operating body (3), a motor chamber (4), a switch component (6) and a control device (7); the tooth washing body (1) is in a U shape matched with a dental arch; the middle part of the closed end of the tooth washing body (1) is opened and provided with an accommodating cavity (11); the upper end surface and the lower end surface of the tooth washing body (1) are both vertically provided with a U-shaped tooth washing groove (2) along the U-shaped tooth washing body (1); vertical bristles (25) are uniformly fixed on the bottom surface of the tooth washing groove (2), and scraping blades (24) are fixed on the inner wall and the outer wall of a lip side wall (21) on the outer side of the tooth washing groove (2) and the inner wall of a tongue side wall (22) on the inner side of the tooth washing groove (2); the tail end of the tooth washing groove (2) is provided with a U-shaped groove (23); bristles (25) are fixed on the inner side wall of the U-shaped groove (23); conical hairs (26) far away from the bottom surface of the tooth washing groove (2) are obliquely fixed on the inner wall of the labial wall (21) at intervals; the operating body (3) is hollow inside; the operating body (3) comprises an operating end (31) and a connecting end (33) fixed with the operating end (31); a button hole (34) for accommodating the switch assembly (6) is formed in the upper part of the operating end (31); the front end of the connecting end (33) is inserted into the hollow motor chamber (4) in the accommodating cavity (11) and covers the front end of the connecting end (33); the control device (7) comprises a vibrating motor (71) sleeved in the motor bin (4), and a control chip (73) and a battery (72) which are arranged in the operation end (31) and are positioned below the switch assembly (6); the control chip (73) is respectively connected with the battery (72) and the vibration motor (71) through electric signals; the control chip (73) is provided with a switch button (74).

2. The double-bristle U-shaped toothbrush according to claim 1, wherein: the motor bin (4) is T-shaped; the inner wall of the accommodating cavity (11) is attached to the outer wall of the motor cabin (4); the vibration motor (71) is arranged in the transverse part of the T-shaped motor bin (4), and the vertical part of the T-shaped motor bin (4) covers the front end of the connecting end (33); the height of the transverse part is greater than that of the vertical part.

3. The double-bristle U-shaped toothbrush according to claim 2, wherein: the device also comprises a motor limiting block (5); the motor limiting block (5) is sleeved on the inner side of the front end of the connecting end (33); the upper end face and the lower end face of the motor limiting block (5) are both vertically fixed with a positioning lug (52); an avoidance groove (42) which is vertically communicated is formed in the motor bin (4); a clamping groove (37) is formed in the inner side wall of the front end of the connecting end (33); the positioning lug (52) passes through the avoiding groove (42) and then is clamped in the clamping groove (37) to fix the operating body (3), the motor bin (4) and the motor limiting block (5).

4. The double-bristle U-shaped toothbrush according to claim 3, wherein: a baffle (38) is fixed on the inner side wall of the front end of the connecting end (33); a cover plate (51) is fixed at the end part of one end of the motor limiting block (5) far away from the motor bin (4); the baffle (38) is positioned between the cover plate (51) and the motor chamber (4); the baffle (38) is attached to the end face of the cover plate (51); a limiting column (41) is fixed on the inner wall of the tail end of the vertical part of the T-shaped motor bin (4); the lower end of the motor limiting block (5) is provided with a limiting groove (53) used for accommodating the limiting column (41).

5. The double-bristle U-shaped toothbrush according to claim 1, wherein: the switch assembly (6) sequentially comprises a pressing piece (61), a button rubber sleeve (62) and a button fastener (63) from top to bottom; the pressing piece (61) is sleeved in the button hole (34) and arranged in the middle of the basin-shaped button rubber sleeve (62); the caliber of the side wall of the basin-shaped button rubber sleeve (62) is larger than that of the button hole (34); a fixing ring (35) fixed with the lower end of the inner side of the operating end (31) is arranged on the outer side of the button hole (34); a plurality of clamping convex blocks (64) are fixed on the outer peripheral surface of the upper end of the hollow cylindrical button fastener (63); the button fastener (63) is clamped and fixed on the inner side of the upper end of the fixing ring (35) through the clamping convex block (64), and the button rubber sleeve (62) is pressed and fixed on the lower end of the inner side of the operation end (31).

6. The double-bristle U-shaped toothbrush according to claim 1, wherein: the operating body (3) further comprises a middle flange (32) which is arranged to protrude outwards; the middle flange (32) is located between the operating end (31) and the connecting end (33); the middle part of the closed end of the tooth washing body (1) is also provided with a containing groove (13) for containing the middle flange (32); the accommodating groove (13) is communicated with the tail end of the accommodating cavity (11).

7. The double-bristle U-shaped toothbrush according to claim 1, wherein: the operating body (3) is divided into an upper shell and a lower shell which are covered up and down; the button hole (34) is arranged on the upper shell; the control device (7) is arranged in the lower shell; a lower shell flange (36) is fixed at the upper end of the outer wall of the lower shell; the outer wall of the lower shell flange (36) is attached to the inner side wall surface of the lower part of the upper shell.

8. The double-bristle U-shaped toothbrush according to claim 1, wherein: the middle part of the connecting end (33) is contracted inwards along the operating end (31) to form a contracted part; and a reverse inclined plane (12) attached to the outer wall surface of the contraction part is arranged in the middle of the accommodating cavity (11).

9. The double-bristle U-shaped toothbrush according to claim 1, wherein: a motor flange (43) is also arranged on the outer side wall surface of the vertical part of the T-shaped motor bin (4); the motor flange (43) is pressed against the inner wall surface of the connecting end (33).

10. The double-bristle U-shaped toothbrush according to claim 5, wherein: a rubber sleeve convex edge (65) is annularly fixed at the upper end of the button rubber sleeve (62); the convex edge (65) of the rubber sleeve is tightly pressed on the inner lower end face of the operation end (31).

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