31results about How to "Change inner diameter" patented technology

Provided in the invention is a Hula hoopcomprising a hoop body formed by connecting a plurality of unit sections end to end. Every two adjacent unit sections are detachably connected with each other through a connecting piece; each unit section is provided with a containing groove for insertion of the corresponding connecting piece. The front section and the rear section of each connecting piece are respectively inserted into the containing grooves of the two adjacent unit sections; each unit section is provided with a locking mechanism for keeping the corresponding connecting piece in the corresponding containing groove. The hoop body is formed by connecting a plurality of unit sections end to end, every two adjacent unit sections are connected through the connecting piece, so that rapiddisassembly and assembly of the unit sections can be achieved; the inner diameter of the hoop body can be changed by increasing or decreasing the number of the unit sections, so that the hoop can adapt to trainees with different figures; the hoop body can be opened at any position, and the operation is more convenient by being compared with the prior art.

The invention relates to the technical field of earphone maintenance equipment, and discloses a round earphone cover surface wiping equipment, which includes a cylinder body, the middle position of the top of the cylinder body is fixedly connected with a handle by screws, and the inner walls of the left and right sides of the cylinder body are fixedly connected There is an installation partition, the top middle of the installation partition is fixedly connected to the battery, the bottom middle of the installation partition is fixedly connected to the low-speed motor through bolts, and the ring side of the inner bottom of the cylinder is fixedly connected to the connection ring, the connection ring The inner side of the cylinder is movably connected with a rotating disc through movable balls, and the output shaft of the low-speed motor is fixedly connected to the middle position of the upper surface of the rotating disc by screws. Half ring button hood. The equipment for wiping the surface of the circular earphone cover is equipped with wiping cotton to contact, wipe and descale the earphone cover, thereby improving the quality of dirt wiping on the large plane surface of the earphone cover and achieving the purpose of descaling.

The invention discloses a clamping device with a spindle pedestal easy to disassemble. The clamping device with the spindle pedestal easy to disassemble comprises a right substrate 1, a left substrate 2 and a jacket, the right substrate 1 and the left substrate 2 are shaped like cuboids and symmetrically arranged, and the right substrate 1 is fixed on a press base 8; the jacket comprises two symmetrically arranged semicircular-ring-shaped jacket blocks 3 which are symmetrically fixed on the right substrate 1 and the left substrate 2 respectively through bolts 4, the inner surface of each jacket block 3 is axially provided with radial annular teeth 31 of which the cross section is shaped like a trapezoid, a strip-shaped groove 21 is formed in the contact surface of the left substrate 2 and the base 8, a boss 81 is arranged on the portion, corresponding to the strip-shaped groove 21, of the base 8, a spring 5 is installed between the boss 81 and the strip-shaped groove 21, motion of the left substrate 2 in the vertical direction is limited by a pressing plate 6, and the pressing plate 6 is connected with the base 8 through a bolt. The clamping device with the spindle pedestal easy to disassemble has the advantages that the jacket blocks are replaceable, the clamping device is suitable for disassembling of the spindle pedestal of bearing seats with different external diameters and bearing seats with different shapes, and meanwhile automation of disassembling of the spindle pedestal can be achieved.

The invention belongs to the field of instruments for visual or photographing examination of cavities and tubes of the human body and particularly discloses a device for fixing a lens in an endoscopesurgery. The device comprises an isolation cover, a fixing ring and a connecting portion, wherein one end of the isolation cover is connected with the fixing ring, the fixing ring is detachably connected with the connecting portion, the inner side of the connecting portion is provided with a fixing structure for fixing a lens, the fixing structure comprises a connecting rod and a fixing part, thefixing part comprises multiple connecting units, the multiple connecting units are sequentially connected to form a ring shape, each connecting unit includes two connecting rods, the middles of the two connecting rods are hinged, and the two ends of each connecting rod are both connected with the inner side of the connecting portion and one connecting unit. The device can fix the lens when a medical worker performs the endoscope surgery and is good in fixing effect, and the adverse influence of shaking of the lens on the endoscope surgery is avoided.

The invention relates to a plasma contactor, in particular to a plasma contactor combined with a hollow cathode electron generator and an annular ionization chamber, belonging to the field of gas discharge equipment. The ionization chamber is provided with a through hole at the center of the top end of the ionization chamber shell; The flange of the hollow cathode plasma contactor is fixedly connected with the shell of the ionization chamber through an insulating ceramic of the shell of the ionization chamber; A first permanent magnet is fixedly mounted on the inner wall of the top end of theionization chamber housing. A second permanent magnet is fixedly installed on the inner cylinder wall of the ionization chamber shell. The anode shell is an open hollow cylinder; The cylinder wall ofthe anode shell is fixedly connected with the mica sheet; The mica sheet is fixedly connected with the second permanent magnet; The invention can optimize the emission characteristics and reduce the transplant cost under different application situations. Under the same working condition, the potential difference can be reduced by about 40%.

The invention relates to a prestressed concrete pipe pile production mold, which relates to the technical field of prestressed concrete pipe pile preparation, which includes a mounting frame, and the mounting frame is provided with a lower forming die and an upper forming die corresponding to the lower forming die , both ends of the upper forming die and the lower forming die are provided with fixed end plates, and fixing devices are arranged between adjacent upper forming dies and adjacent lower forming dies, and the end plates are connected to the lower forming dies. An installation device is arranged between the forming dies, the upper forming die and the lower forming die are connected through a connection structure, and the inner cavities of the upper forming die and the lower forming die cooperate with each other to form a pile cavity. The present invention has the ability to produce multiple This type of pipe pile can improve the actual production efficiency and reduce the production cycle.

The invention provides a method for adjusting internal / external diameters of hollow beams. A device mainly comprises a negative axicon, a convex lens and a concave lens. The device is characterized in that the concave lens and the convex lens are arranged behind the negative axicon and form a zoom refraction system; and the object focus of the zoom system is exactly arranged at the negative vertex of the negative axicon, so that the light rays passing through the negative vertex are ejected approximately in parallel after passing through the zoom system and other light rays deflect toward thecentral line of the ray axis to form the hollow beams a certain distance behind an optical system. The method and the device have the following advantages: by changing the distances among the lenses,the internal / external diameters of the hollow beams can be quantitatively adjusted; the external diameters can be fixed and the internal diameters can be changed; or the internal diameters can be fixed and the external diameters can be changed; and the device has simple structure, is convenient to adjust and is applied in such fields as laser boring, laser shock, bioengineering and the like.

The invention relates to the cable installation field and specifically relates to a street code clamp for a pin insulator. The street code clamp comprises a press plate, a hinge plate assembly and two locking bolts, wherein the press plate and the hinge plate assembly are arranged oppositely. The press plate is provided with a line pressing groove. The hinge plate assembly comprises a first clamping plate and a second clamping plate, wherein the first clamping plate and the second clamping plate are provided with a first C-shaped structure and a second C-shaped structure, the opening directions of which are opposite, respectively. The first C-shaped structure and the second C-shaped structure are cooperated to form a clamp ring for clamping an annular side groove of the pin insulator. The first clamping plate and the second clamping plate are superposed. The two locking bolts pass through the press plate, the first clamping plate and the second clamping plate in sequence and realize threaded connection. The clamping plates and the hinge plate assembly are in bolt connection; the hinge plate assembly is arranged in the annular side groove of the pin insulator through a hinge mode; and therefore, operation is convenient, a cable can be fixed firmly and safely.

The invention relates to a transparent cap for assisting digestive endoscopic resection, which includes an insertion tube, a support structure and an adjustment bracket. It is characterized in that the transparent cap also includes a pulling structure for changing the inner diameter of the adjustment bracket, the support structure supports the adjustment bracket, and the support structure and the adjustment bracket are arranged on the same side of the insertion tube, inside or outside the insertion tube . In addition, the transparent cap is also provided with a disposable insulating rubber ring which is placed on the lesion position during use. The variable inner diameter transparent cap of the present invention is a medical device used in assisting digestive endoscopic resection, which can adjust the size of the inner diameter at any time according to the size of the diseased tissue, so it can be more widely used in endoscopic resection of different sizes of diseased tissue Medium, and easy to use.

The invention discloses a mold for cold isostatic pressing cylinder material, which comprises a base, an inner barrel and a soft mold, the inner barrel is fixedly installed in the middle of the top surface of the base, and a plurality of evenly distributed ventilation holes are opened on the side wall; the soft mold is set on the The inner barrel has a ring-shaped structure as a whole, and its top has a ring-shaped charging port; an inner steel mold is placed inside the soft mold, and the inner steel mold is set around the inner barrel and is close to the outer wall of the soft mold; after the soft mold is loaded, the ring is installed The feed port is sealed and closed and the soft mold is vacuumed. In the present invention, the inner steel mold and the inner barrel are arranged so that the outer diameter of the cylinder product is close to the inner diameter of the inner steel mold, the size is fixed, and the shape is regular, which is beneficial to the processing and the production of large-scale outer diameter products; the inner diameter of the product is smaller than the inner diameter of the charge It needs to be larger and the wall thickness is moderate, which solves the problem of large waste of core material.