Please select the most similar patent number from A, B, C and D. Which number is?
A watchband buckle (1000), a watchband (4000) and a wearable device. The watchband buckle (1000) comprises a first buckle member (1), a second buckle member (2) rotatably mounted on the first buckle member (1), a cover plate (3) rotatably mounted at an end of the second buckle member (2) that is away from the first buckle member (1), a clamping hook member (4) slidably mounted on the cover plate (3), and an elastic member (5) mounted between the cover plate (3) and the clamping hook member (4), wherein the elastic member (5) can enable the clamping hook member (4) to keep clamping connection with an inner wall of a clamping hook hole (11); and the cover plate (3) is provided with a first accommodating groove (35) used for accommodating the first buckle member (1) and the second buckle member (2). When the watchband buckle (1000) is applied to a wearable device such as a watch and a bracelet, and the wearable device is worn on a wrist, the surface of a side of the first buckle member (1) that is away from the cover plate (3) is in contact with skin of the wrist. The clamping hook member (4) is clamped to the inner wall of the clamping hook hole (11) in the first buckle member (1), such that the cover plate (3) and the first buckle member (1) are relatively fixed. Thus, there is no protruding structure at the first buckle member (1), which is in contact with the skin of the wrist, such that the situation whereby wearing comfort is influenced due to a protruding structure abutting against the skin of the wrist is prevented.
A: A fixing assembly and clothing. The fixing assembly comprises: a first fastener (100) comprising a base (110) and a first magnet (120) fixed to the base (110); a second fastener (200) comprising a base plate (210) and a second magnet (220) fixed to the base plate (210), the first fastener (100) and the second fastener (200) being attracted by means of the first magnet (120) and the second magnet (220); and a positioning module configured to prevent relative movement between the first fastener (100) and the second fastener (200) which are attracted. The first fastener (100) and the second fastener (200) can be respectively arranged on a trousers body and a suspender of riding trousers. Because the fixing assembly achieves attraction by means of the magnets (120, 220), when a user roughly moves the fastener on the suspender to the other fastener on the trousers body, the first fastener (100) and the second fastener (200) can be attracted by means of a magnetic attraction effect; furthermore, in combination with the positioning module, the first fastener (100) and the second fastener (200) which are attracted are relatively fixed. The fixing assembly can enable connection between the trousers body and the suspender of the riding trousers more convenient.
B: A new magnetic fastener, comprising a first fastening element (1) and a second fastening element (2). The first fastening element (1) is separably installed on the second fastening element (2). Provided inside of the first fastening element (1) is a first magnetic element (10). A second magnetic element (20a) and a third magnetic element (20b) are arranged adjacently inside of the second fastening element (2). The second magnetic element (20a) and the third magnetic element (20b) can move together linearly in parallel to the first magnetic element (10). When the second magnetic element (20a) faces the first magnetic element (10), the opposite polarities of the facing sides cause the first fastening element (1) and the second fastening element (2) to fasten together due to the mutual attraction between the first magnetic element (10) and the second magnetic element (20a). When the third magnetic element (20b) faces the first magnetic element (10), the same polarity of the facing sides causes the first fastening element (1) and the second fastening element (2) to separate due to the mutual repulsion between the first magnetic element (10) and the third magnetic element (20b). The new magnetic fastener fastens tightly and is convenient to operate.
C: A watch band and a wearable device. The wearable device comprises a main body and a watch band. The watch band includes a first watch band (1) and a second watch band (2), the first watch band (1) comprising a fixing band (13), connecting rods (12) and a buckling band (11); a locking protrusion (10) is provided at one end of the buckling band (11); there are two connecting rods (12), and the two connecting rods are respectively located at ends of two sides of the first watch band (1) and are connected between the buckling band (11) and the fixing band (13); and the buckling band (11) and the fixing band (13) are spaced apart, and a through hole (14) is formed between the two connecting rods (12). When the first watch band (1) is buckled to the second watch band (2), the second watch band (2) passes through the through hole (14) and is stacked between the buckling band (11) and the fixing band (13), and the locking protrusion (10) is buckled into a buckling hole (20) of the second watch band (2). When wearing, the locking protrusion (10) is pressed into the buckling hole (20), and the second watch band (2) passes through the through hole (14) of the first watch band (1), so that the wearing is convenient, and the structure is simple; and the two connecting rods (12) have a connection function, and the two connecting rods (12) are respectively located at ends of the two sides of the watch band, so that the two connecting rods can decorate the watch band as decorative members of the watch band, such that the whole watch band is concise and beautiful in appearance.
D: A bra fastener, comprising a first part (10) and a second part (20). The first part (10) comprises a first connecting band (11) and a plurality of first fastening pieces (12) which are disposed at intervals at the interior of the first connecting band (11) along the length direction of the first connecting band (11), and one surface of the first connecting band (11) is provided with a through hole (111) at a position corresponding to each first fastening piece (12). The second part (20) comprises a second connecting band (21) and a second fastening piece (22) disposed at the interior of the second connecting band (21). The second fastening piece (22) partially extends from one surface of the second connecting band (21) and may pass through one of the through holes (111) on the first connecting band (11) so as to be buckled to a first fastening piece (12) corresponding to the through hole (111). When the second fastening piece (22) is partially buckled to the first fastening piece (12), the second connecting band (21) covers the first connecting band (11).
Answer: C