7results about How to "Guaranteed occlusion" patented technology

The invention provides an optical lens. The optical lens can be used for near-infrared band imaging, the optical lens comprises a lens barrel, a lens group and a spacing element group, the lens group and the spacing element group are located in the lens barrel, and a first spacing element is located between a first lens and a second lens and makes contact with one part of the image side face of the first lens; the minimum distance EP01 between the object side end face of the lens barrel and the first spacing element in the extension direction of the optical axis, the maximum thickness CP1 of the first spacing element, and the air interval T12 between the first lens and the second lens on the optical axis satisfy the following condition: 0.56 < = EP01 / (T12 + CP1) < = 1.01. The curvature radius R1 of the object side face of the first lens, the refractive index N1 of the first lens and the inner diameter d1s of the object side face of the first spacing element meet the condition that R1 * N1 / d1s is larger than or equal to-4.44 and smaller than or equal to-1.71. According to the invention, the problem of serious stray light caused by reduction of aberration in an optical lens in the prior art is solved.

The utility model relates to the field of electronic equipment, aims to solve the problem that dust easily enters equipment or leaks light when a light filtering assembly is pulled out, and provides a skin treatment device which comprises a device body, the light filtering assembly and a flexible shielding piece. The device main body is provided with a plugging port and a slot, and the plugging port is communicated with the slot; and a concave avoiding space is arranged at the inlet of the slot. The light filtering assembly is configured to be inserted into the slot in a matched mode from the insertion and extraction opening or be extracted from the slot. The flexible shielding piece comprises a connecting part and a flexible blocking piece, the connecting part is connected to the device body and located on the side, close to the avoiding space, of the inlet of the inserting groove, one side of the flexible blocking piece is connected to the connecting part, and the other side of the flexible blocking piece extends out of the connecting part to shield the inlet of the inserting groove or is pushed by the light filtering assembly to be contained in the avoiding space when the light filtering assembly is inserted. The beneficial effects of the utility model are that the shielding of the slot can be maintained in the state that the light filtering assembly is pulled out, and the dustproof and light leakage prevention effects are good.

The utility model provides a kind of dustproof device for decoration hole, it is related to decoration tool technical field, the dustproof device for decoration hole includes supporting member and sheltering member, the supporting member is limited to part, the bottom surface of the limiting part and the top surface of decoration board are in abutment;The sheltering member is connected with the supporting member, the sheltering member is compatible with the decoration hole on the decoration board, for the sheltering of the decoration hole;The utility model is cooperated by supporting member and sheltering member, not only firm installation, strong anti-interference ability, but also can guarantee close fitting when using, dustproof effect is remarkable, while simple structure, convenient operation, adaptive flexible, strong versatility.

The invention discloses a radiation protection device for a CT examiner, and relates to the technical field of medical radiation protection equipment, the radiation protection device comprises a bottom plate and a radiator mounted at the top of the bottom plate, and the top of the bottom plate is provided with an examination moving mechanism. According to the radiation protection device for the CT examiner, by arranging the telescopic shielding adjusting mechanism, flexible adjustment of the covering range of a shielding area is achieved, the combined covering area of the first lead cloth and the second lead cloth can be accurately adjusted, it is ensured that sensitive organs are completely shielded, meanwhile, an examined part is prevented from being shielded, and the examination efficiency is improved. The problems that when an existing device is used, the size of a thyroid gland shielding part and the size of a gonad shielding part are fixed, due to body type differences of different crowds, thyroid gland and gonad positions and coverage ranges of adults and children and males and females are obviously different, sensitive organs are difficult to completely cover by the shielding parts with the fixed sizes, and the sensitive organs cannot be completely covered by the shielding parts with the fixed sizes are solved. And the protection effect and the diagnosis accuracy are influenced.

The utility model provides a shielding cover and a water heater comprising the same. The shielding cover is used for shielding a pipeline assembly located below a shell of the water heater in the first direction. The shielding cover comprises a shielding body and a magnetic part. The shielding body comprises a side wall, the side wall extends in the first direction, a containing cavity for containing the pipeline assembly is defined by the side wall, a mounting part extending into the containing cavity is arranged at the end, close to a shell of the water heater, of the side wall, a mounting groove used for containing the magnetic part is formed in the mounting part, an opening of the mounting groove faces the shell, and the magnetic part is exposed out of the opening. The magnetic part is attached to and magnetically attracted to a shell of the water heater and used for fixing the shielding cover to the shell of the water heater. The shielding cover is arranged, so that the exposed pipeline assembly of the water heater can be shielded; by arranging the magnetic piece which is attached to the shell of the water heater and magnetically attracted to the shell, the shielding cover is fixed to the shell, and simple and convenient installation is achieved while the shielding and decoration effects are guaranteed.

This utility model discloses a dustproof HDMI cable connector, belonging to the technical field of HDMI cable connectors. It includes a connector head, one end of which has a connecting wire, and the other end of which has a connecting terminal. A mounting plate is fixed to the end of the connecting terminal near the connector head. It also includes an adjustment mechanism disposed between the mounting plate and the connector head. The adjustment mechanism is used to adjust the retraction and extension of the connecting terminal. A through groove is formed at the end of the connector head away from the connecting wire, and the extended connecting terminal passes through the through groove. A dustproof component is provided inside the through groove to prevent dust from entering when the connecting terminal is retracted or extended. This dustproof HDMI cable connector has good dustproof performance. The connecting terminal can extend outside the connector head during use and can be retracted inside the connector head when not in use, avoiding direct exposure to the outside and preventing dust from entering. This improves the stability of signal transmission during subsequent connections.

This utility model relates to the field of non-magnetic pipe cutting devices, and more particularly to a non-magnetic pipe cutting device with a protective mechanism. The device includes a cutting device body, a cutting unit, and a protective cover. An auxiliary protective component is fitted onto the outside of the protective cover, and the auxiliary protective component is connected to the protective cover via an installation component. In this utility model, the protective cover provides basic protection. Simultaneously, the extension protrusion driven by the spring body continuously pushes one end of the telescopic protective cover to adhere to the outer wall of the non-magnetic pipe to be cut. This facilitates active and dynamic adhesion to the outer walls of pipes of different diameters within a certain range, ensuring that the cutting device body shields the rapidly rotating cutting disc or flying pipe debris during the cutting process.