Please select the most similar patent number from A, B, C and D. Which number is?
The present invention provides an antenna, a wearable device, and a terminal device. The antenna comprises: a first component provided with an antenna radiator, the antenna radiator being provided with a first antenna feed point group and a second antenna feed point group; and a second component provided with a contact portion electrically connected with a radio frequency link of a circuit board. The first component and the second component can be moved relative to each other. When the first component is moved to a different preset position relative to the second component, the first antenna feed point group and the second antenna feed point group are separately electrically connected with the contact portion.
A: The present invention relates to a wearable device and a display method. The wearable device comprises: a dial plate, wherein the dial plate is provided with an accommodation groove; a watch body, at least partially arranged in the accommodating groove and rotationally connected to the dial plate, wherein the watch body is provided with a functional component; and a position detection member, comprising a first component and a second component, wherein one of the first component and the second component is arranged on the dial plate, the other is arranged on the watch body, the first component comprises a first sub-component and a second sub-component, and the first sub-component and the second sub-component are spaced apart in a rotation direction of the watch body; and the position detection member has a first state and a second state, when the position detection member is in the first state, the first sub-component is opposite the second component, and when the position detection member is in the second state, the second sub-component is opposite the second component.
B: The embodiments of the present application provide an electrical connection assembly and a mobile terminal, and relate to the technical field of electronic communication to solve the problem of unstable contact of electrical connection points between electronic elements and a surface with unstable resistance. The electrical connection assembly comprises a first component, a second component, a conductive portion, and a first insulating layer. The first component and the second component each have a conductive surface, and the conductive surface of the first component is provided opposite the conductive surface of the second component. The conductive portion is located between the first component and the second component, the conductive surface of the first component is provided with a first insulating layer, and the conductive portion is in contact with the first insulating layer. The conductive portion is electrically connected to the conductive surface of the second component
C: An adjustment and positioning device and method, and a radiation scan imaging apparatus. The adjustment and positioning device is used to adjust a direction of a ray source assembly (10) of the radiation scan imaging apparatus. The adjustment and positioning device comprises: a base (100), wherein the base (100) comprises a first component and a second component connected to each other, and is configured to be used to support the ray source assembly (10) such that the ray source assembly (10) is vertically positioned on the second component; a first adjustment mechanism (200) mounted on the first component of the base (100) and an apparatus frame of the radiation scan imaging apparatus, and is configured to drive, by driving the entire base (100) to move relative to the apparatus frame, the ray source assembly (10) to perform translational motion in a first direction so as to adjust the position of the ray source assembly (10); and a second adjustment mechanism (300) mounted on the second component of the base (100) and the apparatus frame, and is configured to drive, by driving the second component to move relative to the first component, the ray source assembly (10) to rotate within an angle range so as to adjust a beam direction of the ray source assembly (10).
D: A wearable electronic device, comprising a first main body portion; a second main body portion, the second main body portion being connected to the first main body portion; a wearable portion, connected to opposite ends of the first main body portion, the wearable portion being used to secure the first main body portion and the second main body portion onto an external object; a first antenna, arranged on the first main body portion or the second main body portion, the first antenna being used to transmit a radio frequency signal; and a second antenna, arranged on the wearable portion, the second antenna being used to transmit a radio frequency signal.
Answer: D