Please select the most similar patent number from A, B, C and D. Which number is?
A lamp cable connector (100) and a lamp (200). The lamp cable connector (100) comprises: an end cover (1), wherein an opening hole (11) is provided in the end cover (1); a cable (3) configured to be assembled with the end cover (1), wherein an end of the cable (3) is provided with a protruding portion (31), and an outer side wall of the protruding portion (31) is provided with an accommodating groove (33); and a sealing member (2) sleeving the protruding portion (31) and accommodated in the accommodating groove (33), wherein the cable (3) is assembled with the end cover (1) and then inserted into the opening hole (11), and the sealing member (2) is pressed and fixed between the protruding portion (31) and the end cover (1), such that the end cover (1) is connected to the cable (3) in a sealed manner. Waterproofing between the end cover (1) and the cable (3) can be directly achieved by using the waterproof function of the cable (3), no separate waterproof connector needs to be assembled and connected to the cable (3), and the waterproof effect exhibited after assembly of the cable (3) and the lamp (200) can be effectively enhanced.
A: A waterproof hybrid encoder, comprising a sealing element, an insulating sheath, bearings, an insulating gland, a threaded pressing element, an optoelectronic system, a grating disc, a support ring, a circuit board, a back cover, a waterproof electric cable connector, an encoder body, a hollow shaft, a fixing frame, and a spacer ring; the hollow shaft is fixedly connected to a generator output shaft according to a precision matching requirement, and the grating disc is fixed on the hollow shaft by means of the support ring; the hollow shaft is connected to the encoder body by means of the sealing element, the two bearings, the insulating sheath, the insulating gland, and the threaded pressing element; the spacer ring is provided between the two bearings; disposed on the encoder body are the circuit board and the optoelectronic system comprising a light emitting tube corresponding to a code channel of the grating disc, an indicating grating, and an optoelectronic receiving element array; the encoder body is fixed on a generator base by means of a fixing frame; an electrical cable is connected to the circuit board and outputs by means of a waterproof sealed electrical cable connector. The encoder does not require an expensive insulating bearing or an insulating adapting shaft for the encoder which requires complex installation. When used for feedback on the speed of wind motors, the present invention is easily assembled, requires only conventional bearings, and enhances insulation, breakdown shaft voltage, and shaft current protection.
B: A waterproof casing having a high cooling efficiency, the casing comprising a main body (1), a first end cap (2), and a second end cap (3). The main body (1) is integrally formed by means of an aluminum drawing process. The first end cap (2) and second end cap (3) are sealingly connected to two ends of the main body (1), respectively. A cooling channel (4) is provided on an inner wall on at least one side of the main body (1). A ventilation device (11) is provided between the cooling channel (4) and an internal space of the main body (1), is used to draw an airflow from within the internal space of the main body (1) to the cooling channel (4), and drives the airflow to circulate between the cooling channel (4) and the internal space of the main body (1). Also provided is a stage lamp having the waterproof casing having a high cooling efficiency. The present invention enables the waterproof casing having a sealed structure to have a high cooling efficiency, thus providing waterproofness to a stage lamp without influencing an operation performance of the stage lamp.
C: Disclosed is an endoscope, comprising a camera handle for fixing a camera lens and a plug-in connector thereof, the camera handle comprising an outer housing, an end cover and an inner housing, and a sensor element in the inner housing; a lens group is provided between the sensing element and the end cover; the inner housing is fixedly connected to the outer housing by means of a mounting assembly, and the outer housing is fixedly connected to the inner housing by means of a fixing assembly; and a light-transmitting hole corresponding to the position of the sensing element is formed in the middle of the end cover. The beneficial effect of the present invention is that the inner housing is located in the outer housing, and both the inner and outer housings are fixedly connected to the end cover, so that the overall sealing performance of the camera handle is excellent, and the waterproof and dustproof performance is good. A detachable waterproof cap is provided at the end part of a sleeve, and an elastic sealing ring is provided between the waterproof cap and a mounting tube, so that a plug is in a closed space, which may prevent damage to a wiring plug caused by the infiltration of disinfectants. The endoscope is suitable for use as a wiring plug of medical equipment, and has good waterproof performance and usage safety.
D: An accumulated water resistant lamp (100), comprising a lamp body (10) having a top and a bottom, a light source module (20) and a sealing member (30) which are accommodated in the lamp body (10), and a mask (40) connected to the top of the lamp body (10) to shield the light source module (20) and the sealing member (30). The accumulated water resistant lamp (100) further comprises pressing members (50) for fixing the mask (40) to the lamp body (10) and fixing members (60) for assembling and fixing the pressing members (50). Each pressing member (50) is provided with a mounting portion (52) extending into the lamp body (10), and a gap (a) is reserved between the pressing member (50) and the lamp body (10). Fixing recesses (13) for accommodating the fixing members (60) are provided at the bottom of the lamp body (10). The gap (a) is communicated with the fixing recess (13), so that accumulated water between the mask (40) and the lamp body (10) flows out of the gap (a) and the fixing recess (13). Compared with the prior art, the present structure can automatically drain accumulated water on the lamp, does not cause water leakage and damage of the lamp due to long-term residual accumulated water, and effectively solves the problem of the waterproof failure of the lamp due to the fact that long-term residual accumulated water cannot be drained.
Answer: D