Please select the most similar patent number from A, B, C and D. Which number is?
A compressor, comprising: a support (10), a first limiting structure (11) being provided on the support (10); a rotation prevention structure (40), disposed between the support (10) and a movable scroll plate assembly and provided with a first positioning structure (41) and a second positioning structure (42), the first positioning structure (41) being movably provided in the first limiting structure (11), and the second positioning structure (42) being movably disposed in a second limiting structure (21); a first suspension structure (50), working in concert with the first positioning structure (41) and the first limiting structure (11) to reserve a first predetermined gap between the first positioning structure (41) and the first limiting structure (11); and a second suspension structure (60), working in concert with the second positioning structure (42) and the second limiting structure (21) to reserve a second predetermined gap between the second positioning structure (42) and the second limiting structure (21). Also provided is a vehicle having the compressor. According to the structure, the rotation prevention structure (40) can be kept from being in contact with both the support (10) and the movable scroll plate assembly, so that generation of friction between the rotation prevention structure (40) and the support (10) and between the rotation prevention structure (40) and the movable scroll plate assembly is avoided, and no lubricating oil or lubricating grease is required by the rotation prevention structure (40).
A: Disclosed a drug delivery device, comprising a housing (10), a driving mechanism (20), a first limiting structure (30), an injection mechanism (40), and a transmission mechanism (50). The driving mechanism (20) comprises an adjusting member (21), a first memory (22), and a second memory (23). When the driving mechanism (20) is in an adjusting state, the adjusting member (21) drives the second memory (23) to move between an initial position and a final position. When the driving mechanism (20) is in a delivery state, the adjusting member (21), the first memory (22), and the third memory (23) are relatively stationary. One of a first limiting member (31) and a second limiting member (32) of the first limiting structure (30) is disposed on the first memory (22), and the other of the first limiting member (31) and the second limiting member (32) is disposed on the second memory (23). The first limiting member (31) cooperates with the second limiting member (32) to limit the movement of the second memory (23) with respect to the first memory (22) when the second memory (23) is at the final position. The delivery device can solve the problem in the related art that it is difficult to prevent a set dose from exceeding the remaining dose in a medicine bottle.
B: A scroll compressor (100) comprises a scroll compressor shell (1); a static scroll plate (3), wherein the static scroll plate (3) is fixed inside the scroll compressor shell (1); a rack (2), wherein the rack (2) is mounted inside the scroll compressor shell (1); an orbiting scroll plate (4), wherein the orbiting scroll plate (4) can be movably supported on the rack (2) and in joint with the static scroll plate (3); and an actuating mechanism (6), wherein the actuating mechanism (6) is fixed at a lower end of the scroll compressor (100) and connected to the orbiting scroll plate (4) so as to drive the orbiting scroll plate (4) to rotate. A first joint component (41) is arranged on the orbiting scroll plate (4) and a second joint component (31) is arranged on the rack (2) inside the scroll compressor (100) or the static scroll plate (3), wherein the first joint component (41) and the second joint component (31) are mutually matched so as to prevent the orbiting scroll plate from rotating in a period when the scroll compressor operates normally. The scroll compressor makes it easy to control a processing precision and a matching precision of the orbiting scroll plate and the static scroll plate, reduces costs and improves performance of the compressor.
C: An electronic expansion valve, comprising: valve body (10), the valve body (10) having a valve port; a valve head (20) movably provided in the valve body (10), the valve head (20) being used for blocking the valve port; a rod-shaped member (30), the rod-shaped member (30) having a first end and a second end opposite to each other, the first end penetrating into a cavity of the valve head (20), the second end having a positioning structure (31), the positioning structure (31) being used for positioning the circumference of the rod-shaped member (30), the positioning structure (31) being a positioning plane, and the positioning plane being parallel to the axis of the rod-shaped member (30); a valve sleeve (41) provided in the cavity of the valve head (20), the first end of the rod-shaped member (30) being fixedly connected to the valve sleeve (41), and the valve sleeve (41) being in limiting fit with the valve head (20); and an elastic member (42) provided in the cavity of the valve head (20), one end of the elastic member (42) matching the valve head (20), and the other end of the elastic member (42) being compressible by the rod-shaped member (30).
D: A handle assembly and an anastomat comprising same. The handle assembly comprises: a first handle member provided with a sliding slot (41), a first sliding block (42) being slidably provided in the sliding slot (41), one end of the sliding block (42) being provided with a first limiting structure (43), a second section (412) of the sliding slot (41) being provided with a second limiting structure (44), and a compression spring (45) being provided between the two limiting structures (43, 44); and a second handle (2), a first end of the second handle (2) being rotatably connected to the first handle member, and the sliding block (42) moving toward the second section (412) of the sliding slot (41) under external force. When the first handle member is rotated in a first direction, the compression spring (45) is deformed, and the sliding block (42) abuts against the second handle (2) and pushes the second handle (2) to rotate; and when the sliding block (42) is released from the external force, the compression spring (45) pushes the sliding block (42) to reset. According to the handle assembly, a handle is divided into the first handle member and the second handle (2), and the linkage state of the two is controlled according to the moving position of the sliding block (42); the sliding block (42) may be reset under the action of the compression spring (45) after being released from the external force, and the position of the compression spring (45) is limited by means of the first limiting structure (43) of the sliding block (42) and the second limiting structure (44) of the first handle member.
Answer: B