Please select the most similar patent number from A, B, C and D. Which number is?
A toothbrush with a vocal instruction function, comprising: a bristle portion (10) comprising a bottom plate (11) implanted with a plurality of bristles (12) therein for cleaning teeth and gingiva; a handle comprising a cavity (31); a battery pack (40) located in the cavity (31) and comprising at least one battery; a circuit comprising a processor (51) with a voice processing function; a storage element (52) capable of storing a voice message for teaching a child how to brush teeth properly; and a speaker (60) for receiving a voice signal from the processor (51) and playing the stored voice. The toothbrush with the vocal instruction function can play the voice for instructing teeth brushing actions, so that a person brushing the teeth can use the toothbrush and brush the teeth according to the played voice. The toothbrush can also sense tooth brushing pressure and display the sensed pressure value so as to remind a user to brush the teeth with proper force.
A: Disclosed is a toothbrush of a dual-layer bristle structure, the toothbrush comprising a toothbrush handle (10) and a toothbrush head (20). The toothbrush handle (10) is an elongated rod. The toothbrush head (20) is arranged at an end of the toothbrush handle (10), and comprises a base (21), an inner forming bristle portion (22) and a plurality of outer bristle-planting bristle portions (23), wherein an end of the base (21) is connected to the toothbrush handle (10); the inner forming bristle portion (22) has a plurality of first bristles (221) and is arranged on the base (21); and the outer bristle-planting bristle portions (23) are arranged on the base (21) and surround the inner forming bristle portion (22) at intervals, and each outer bristle-planting bristle portion (23) comprises a support base (232) and a plurality of second bristles (231), with the support base (232) being arranged on the toothbrush head (20) and the second bristles (231) being arranged on the support base (232). By means of arranging the second bristles (231) on the support base (232), the supporting performance of the second bristles (231) is improved, such that apart from having the function of cleaning gaps between teeth, the second bristles (231) also have the effect of massaging the gingiva.
B: An electric toothbrush using three-sided bristles, comprising an electric toothbrush. The electric toothbrush comprises a toothbrush head; the toothbrush head comprises a toothbrush head handle (1); a first plate (4) is arranged below the toothbrush head handle (1); and a first bristle sheet (9) and a second bristle sheet (8) are longitudinally arranged below the first plate (4). Tooth cleaning demands of people different in oral cavity and tooth size can be satisfied by means of surrounding effects of the three-sided bristles and self-adaptive effects of automatic bristle fitting along with thickness changes from front teeth to molars. By design of the three-sided bristles, the problem of difficulty in cleaning inner side areas of teeth is solved, various bad tooth-brushing habits are avoided, a user does not need to initiatively change toothbrush head positions to search cleaning points and only need to push the toothbrush head to complete a whole tooth-brushing process, and accordingly the tooth-brushing process is simplified, and tooth-brushing efficiency is improved.
C: A smart toothbrush (1) comprising: a handle section (10), a protective cover (30), a bristle section (40), a sensing unit (20), and a signal processing module (50). The sensing unit (20) and the signal processing module (50) are provided in an internal space of the handle section (10). The handle section (10) is provided with a sensing area (13) and a sensing area opening (131). The sensing area opening (131) is in communication with the internal space. The protective cover (30) is provided at the sensing area opening (131). The sensing unit (20) is provided corresponding to the protective cover (30). The sensing unit (20) executes a physiological sensing function in the sensing area (13) and generates physiological sensing information. When a user is holding the toothbrush (1) to brush teeth, the palmar side of the fingers or the palm of the user presses the sensing area (13), the sensing unit (20) is thus allowed to execute the physiological sensing function via the sensing area (13) and to generate the physiological sensing information; moreover, the physiological sensing information can be transmitted by the signal processing module (50) in a wireless manner to an electronic device for displaying, an application in the electronic device can further be utilized for data analysis, and allows, with smart interconnections equipped, the user to comprehensively learn health information of self.
D: A toothbrush of the present invention comprises a handle and a brush head, the brush head being provided with an outer frame, multiple cylinder bodies, and a flexible filling layer. The outer frame is integrally provided at the tail end of the handle, and the multiple cylinder bodies are provided at intervals to form the shape of a brush head, one ends of the multiple cylinder bodies are recessed to form fixing grooves for implanting bristles, and the flexible filling layer is provided between the outer frame and the multiple cylinder bodies. When the toothbrush of the present invention is used by a user to brush teeth, as the bristles in the multiple cylinder bodies can respectively shift towards different directions, the tooth faces and the tooth gaps can be effectively cleaned, thereby having a good dental cleaning effect and providing convenience for the operation of the user; in addition, the flexible filling layer absorbs an excessive force applied by the user, thereby avoiding damage to the gingivae.
Answer: C