40results about How to "Prevent pullback" patented technology

The invention relates to a right-angle connection in the grid of a suspended ceiling, between inverted T-beams having a vertical web extending between a bulb at the top and flanges at the bottom. A connector on the end of a cross beam hooks into a slot in the web of a main beam. The connector has a plastic encasement that forms abutments about a metallic core. The abutments position the connector within the slot in the web, and prevent further entry of the connector into the slot, under normal conditions. The plastic abutments melt away during a fire, so that the beam can expand longitudinally into the slot to relieve stresses in the beam, without the beam buckling. Ridges on the bottom of the metallic core that engage the web at the bottom of the slot, prevent pullback of the connector from the slot, during a fire, to prevent the ceiling from sagging or drooping.

The invention discloses a dustproof display in the field of computer accessories. The dustproof display comprises a display screen, a base, a support pillar and a back shell. The back shell is in a shape like a rectangular basket with one open side, a rectangular frame shaped front shell matched with the shape and the size of the back shell is fixed in an opening of the back shell, the display screen is fixed between the back shell and the front shell, and the back shell is fixed on the base through the support pillar. A vertical rotating shaft is arranged in the left side of the back shell, elastic reset pieces are respectively arranged on two ends of the rotating shaft, and dustcloth is twined on the rotating shaft. A kerf is arranged on a position which is opposite to the rotating shaft at the left side of the front shell, and a rectangular clamping groove is arranged in a position which is opposite to the kerf at the right side of the front shell. One end of the dustcloth, which is far away from the rotating shaft, penetrates through the kerf and is fixed with a clamping board, and the shape of the clamping board is matched with that of the clamping groove. According to the scheme, dust in the environment can be effectively prevented from falling on the display screen, the dust accumulated on the display screen is reduced, and furthermore, when the display is used, an image can be more clearly displayed, so that the degree of fatigue of eyes of a user is relieved.

The invention discloses a multifunctional outdoor news gathering apparatus, and the apparatus comprises a U-shaped frame, wherein the interior of the U-shaped frame is of a hollow structure, and two ends of the U-shaped frame are in plugging connection with an adjustment bolt. Moreover, one end of the adjustment bolt is connected with a rotating handle, and the opposite end of the adjustment boltis in spiral connection with a nut. According to the invention, the rotating handle is enabled to rotate by a certain length so as to reduce the frictional force between a first abrasive disk and a second abrasive disk, and then a microphone is enabled to rotate around the adjustment bolt which is taken as the center till the angle between the microphone and the U-shaped frame is suitable for a journalist to carry out the interviewing, and finally the rotating handle is enabled to rotate to adjust the adjustment bolt till the frictional force between the first abrasive disk and the second abrasive disk is sufficient for supporting the microphone. The above structure brings convenience to a user for storing the microphone, and the U-shaped frame is used for protecting the microphone to a certain degree. Moreover, the adjustment bolt can enlarge the movement range during interviewing while the microphone rotates.

The invention provides a hair wrapping device, including a hair wrapping disc, which is connected with a drive system, and the drive system is used to drive the hair wrapping disc to rotate. The wire head pressing piece can rotate synchronously with the hair winding disk. When the external force drives the wire head pressing piece to deviate from the hair winding disk laterally, the gap between the wire head pressing piece and the hair winding disk is used as the place for placing the hair end. After the external force is removed, the hair end is pressed tightly on the hair winding plate through the wire head pressing member to press the hair end on the hair winding plate; when the hair end is pressed on the hair winding plate, the drive system The hair coil is driven to rotate so as to wind the hair strands on the hair coil to form a hair bundle. The invention is applicable to the preparation of hair ties of various specifications, and not only solves the problem of "the amount of hair has exceeded the required amount when the hair is coiled several times on the reel and fixed, resulting in the hair ties being wound not meeting the requirements and The technical problem of "material waste" has been greatly improved, and the production efficiency has been greatly improved.

The invention discloses an office swivel chair with foldable armrests, and relates to the technical field of office swivel chairs. The swivel chair includes a seat plate. A first armrest and a secondarmrest are fixedly mounted at two sides of the upper surface of the seat plate respectively. The first armrest is provided with a receiving cavity. A first rotating shaft, a second rotating shaft anda placement plate are disposed in the receiving cavity. The second armrest is provided with a groove. The middle of the groove is provided with a transverse bar. One end of the transverse bar penetrates a through hole in the middle of a sliding plate and is fixedly connected to the inner wall at one side of the groove. According to the chair, storage of the placement plate is facilitated througharrangement of the receiving cavity, the first rotating shaft can rotate to take the placement plate out of the receiving cavity, the placement plate can rotate from a vertical position to a horizontal position through the second rotating shaft, so that through arrangement of the first and second rotating shafts, the chair has an effect of convenient folding.

In a method for opening a drafting arrangement (1) with a plurality of pairs of rollers for drawing a sliver (2), the fiber tape (2) between a pair of transport rollers (6) and an at least one input and a pair of output rollers (10, 12), a preferably input, at least one central and a pair of output rollers (10, 11, 12) comprising a drafting unit (1) taut, wherein each roller pair of the drafting unit (1) has at least one upper and one lower roll. Before opening of at least the input and / or middle roller pair (10, 11) of the drafting arrangement (1), the tension of the sliver (2) between the transport roller pair (6) and the drafting unit (1) is reduced, in particular released. In a corresponding drafting arrangement by means of a mechanical or electrical coupling or ; Control prior to the opening of at least the input and / or middle roller pair (10, 11) of the drafting arrangement (1), the tension of the sliver (2) between the transport roller pair (6) and the drafting unit (1) is reduced, in particular released.

The invention discloses a gastric cancer full-thickness specimen sampling apparatus, which comprises a needle tube and a core rod, wherein the core rod is arranged in the needle tube; a syringe needleis arranged on the needle tube; a cap is arranged at the end, back away from the syringe needle, of the needle tube; a rod hole, in which the core rod can slide, is formed in the cap; a rubber coveris arranged on the core rod; a fixing structure is arranged on the core rod; the fixing structure comprises a control rod, a spring and a Z-shaped locating piece; a sliding hole is formed in the corerod; a mounting hole is formed in the sidewall of the sliding hole; and a locating hole, in which the locating piece is embedded, is formed in the hole wall of the rod hole. The locating piece is justaligned with the locating hole when a suction amount nearly reaches a required value during sampling, and the control rod is pushed to slide under the power of the spring, so that the locating pieceis driven to get inserted into the locating hole and the core rod and the needle tube are locked; therefore precise control over the suction amount can be achieved, and pain in a patient due to excessive suction can be prevented; and in addition, less suction can be prevented, and the accuracy of test can be reduced.

The invention belongs to the technical field of a stamping die, and in particular relates to a device for the stamping die. The device for the stamping die comprises a base, thread sleeves, threaded rods, a lifting plate, an electric driving module, etc., wherein the base is fixedly arranged on the discharging side of the stamping die, and the two thread sleeves matched with a bearing at the upperend of the base are connected with the lifting plate respectively through the threaded rods screwed with the two thread sleeves. According to the device for the stamping die, the height of the electric driving module can be adjusted according to the frequency of stamping a material strap of the stamping die, and the effective stirring distance of a swing plate to the material strap through a telescopic rod, a semicircular block and an arc-shaped friction pad under different stamping frequencies is ensured; and further, the fact that the stamping frequency is consistent with the stirring frequency of the arc-shaped friction pad to the material strap is ensured. A limiting block matched with the material strap prevents the material strap from being pulled back under external force, and theeffectiveness of stirring the material strap forward of the swing plate through the telescopic rod, the semicircular block and the arc-shaped friction pad is ensured.