88 results about "Skin stretching" patented technology

The invention relates to a nozzle device adapted for placement against a skin surface of a subject, the nozzle device providing a means for stretching the skin, the nozzle device being suitable for use in jet injection. More specifically, the skin stretching means is arranged circumferentially relative to a nozzle, the skin stretching means having an initial first configuration corresponding to an initial state in which the skin stretching means is adapted to be placed against a skin surface of the subject, the skin stretching means being moveable to a second configuration, wherein movement of the skin stretching means to the second configuration after the skin stretching means has been placed against the skin of the subject results in the skin being stretched relative to the outlet nozzle.

Embodiments of the present disclosure relate devices, systems, methods, and for displaying information about the direction and magnitude of position, movement, and/or resistive force experienced for an object. The present disclosure also provides a shear display device that can generate skin shear with one or more tactors, each moving in a two- or three-dimensional space. The movement of the tactors can represent to a user various information about an object.

The invention discloses a vibration-assisted aircraft skin stretch forming and resilience inhibition device and technique. The device is characterized in that the following components are included: a mould, a vibration exciter, a cushion, a stretching device, a workbench, a fixed part; the vibration exciters are symmetrically fixed inside both sides of the mould, and the mould is provided with a cushion underneath. During stretch forming, stretching motion and vibration of the vibration exciter function synchronously; the control system starts the vibration exciter, and drives the mould to vibrate at a low frequency, till the forming process is finished. After stretch forming is finished, the vibration exciter drives the mould and the formed aircraft skin to vibrate at a high frequency to prevent the resilience of the aircraft skin. The aircraft skin stretch forming and resilience inhibition device and technique can ensure the sufficient deformation of sheet bars, and prevent resilience of the aircraft skin, thereby improving the forming quality.

The invention relates to a stretch forming method for a titanium skin part. According to the technical scheme, a titanium skin part blank is placed on a skin stretching machine, aluminum strips are glued at the upper end and the lower end of the titanium skin part blank, and the titanium skin part blank is clamped by jaws of the skin stretching machine through the aluminum strips; and the titanium skin part blank stretched towards two sides is driven by the jaws of the skin stretching machine to achieve a yield strength, and the titanium skin part blank is coated on a stretch die till completely fitting the profile faces of the stretch die. Property of being clamped of the black is improved, slipping when a part is clamped by the jaws of the stretching machine is prevented, pull force on the part is even and stable, qualified parts can be produced successfully, requirements of actual production are guaranteed, and qualified-product rate is high.

The invention provides an annular skin stretching device, comprising a stretching line, a rod body, a hollow pipe, and retaining clips which can slide relative to the rod body. A wound surface skin is continuously sutured by the stretching line. After suture, the tail ends of two sides of the stretching line intersect and pass through the hollow pipe, and the tail ends of two sides of the stretching line are respectively tensioned on the retaining clips on the corresponding sides. The retaining clips move a certain distance towards the corresponding ends of the rod body, so under the action of the stretching line, the skin around the wound surface is stretched to a certain degree to the center of the wound surface, and then the retaining clips are fixed on the rod body, to keep stretching. The skin around the wound surface continuously tightens toward the center of the wound surface under the action of the stretching line, so as to gradually reduce the wound surface. The device is simple, light and handy in structure, and has little influence on motion of a patient. The device is suitable to be used in irregular skin defects, and can reduce economical burden of the patient.

The invention relates to a method for designing loading trajectory of airplane skin lengthwise stretch forming and generating numerical control codes based on ACB FEL serial numerical control lengthwise stretcher, comprising two steps: a first step: (1) designing the loading trajectory of lengthwise stretch forming and computing initial hole site; (2) initializing clamping and prestretching; (3) computing deflection angle; (4) computing jaw; and (5) searching for the excursion of the reference point of a mediate subsidiary clamp; and a second step: (1) inverse solving mechanism position and analyzing mechanism; and (2) movement evaluating. The method designs space motion location of the mediate subsidiary clamp, converts the loading trajectory into the numerical control of a device by the inverse solution, and computes the other space attitude parameter of each clamp according to the geometric characteristics of components, thereby, improving design efficiency and accuracy of stretch forming technological parameter. Optimally compared with the traditional method, the invention can obtain optimal produce technological process program, and realize scientific, numeralization and controllability of the airplane skin stretch forming. The invention has wide utility value and application prospect.

A device and method for enhancing skin piercing by microprotrusions involves pre-stretching the skin to enhance pathway formation when the microprotrusions are pressed into the skin. An expandable device includes skin engaging opposite ends that contact the skin surface so that when the device is expanded the skin is stretched. The skin is placed under a tension of about 0.01 to about 10 megapascals, preferably about 0.05 to 2 megapascals. The device has a plurality of microprotrusions which penetrate the skin while the skin is being stretched by the expanded device. Another stretching device employs suction for skin stretching.

The invention provides a skin stretch-forming method with a transition sectional face of a flexible multipoint mould. The method includes the following steps of step1, the appearance of an intermediate transition skin is calculated; step2, a data model of initial sectional face of an intermediate transition mould is formed; step3, skin stretch forming is carried out to form an intermediate transition skin (4); step4, a next intermediate transition mould sectional face or a final transition mould sectional face is designed; step5, step3 and step4 are repeated in sequence until the final skin (4) is formed. According to the skin stretch-forming method with the transition sectional face of the flexible multipoint mould, a plurality of scattered punch bars with adjustable heights are used for fitting the three-dimensional sectional face of the mould, and therefore forming requirements of parts with different sectional faces are met.

The invention discloses a skin stretching and fixing frame which comprises a bracket and a skin stretching and fixing component, wherein the bracket comprises two supporting rods, and the skin stretching and fixing component comprises a fixing rod I and a fixing rod II; the fixing rod I and/or the fixing rod II are/is in sliding fit with the two supporting rods; and fixing buckles which are in one-to-one correspondence are arranged on the fixing rod I and the fixing rod II. When the skin stretching and fixing frame is used, the skin of an animal model is stretched through the skin fixing buckles, the limbs of the animal model are bound on the bracket through ropes, and the interval between the fixing rod I and the fixing rod II is adjusted by sliding the fixing rod I and/or the fixing rod II, thereby changing the stretching force born by the skin of the animal model; and when the interval reaches the required degree, the fixing rod I and/or the fixing rod II are locked and fixed to keep the skin stretching state stable. The whole device has the advantages of simple structure, easy manufacture and convenient operation, and is suitable for researching and observing the change of biological behaviors such as multiplication rates, growth states and the like of different cells under the condition of different stretching force and pathological and physiological processes and related mechanisms in the healing process of the wound surface of the animal model.

The invention provides a rapid design method of a personalized bone plate with a controllable fitting degree. The method comprises the steps that firstly, three-dimensional reconstruction is carried out on a bone of a patient, and according to design requirements and needs, a parameter panel which is matched with the three-dimensional model and the area range of the to-be-fixed bone plate on the three-dimensional model is generated; the parameter panel is subjected to skin stretching operation towards the three-dimensional model, and a shaping panel which is attached to the surface appearance of the three-dimensional model is formed, wherein the shaping panel can completely cover the area range of the to-be-fixed bone plate on the three-dimensional model; cutting, thickening and other shaping and adjusting treatment are carried out on the shaping panel, and a bone plate model with a certain thickness and shape is generated. Subsequently, existing machining and manufacturing equipment and technologies, such as a multi-axis numerical control machine tool and the additive manufacturing technology, can be utilized, and the personalized bone plate is prepared. The bone plate prepared according to the design is controllable in fitting degree, good in adaptability and safe to use, and has the advantages of being long in service life and the like.

The invention discloses a simple skin stretching device. The skin stretching device comprises a pair of insertion needles and a pair of closing-up devices and is characterized in that the insertion needles can be inserted into the skin, and the closing-up devices can close up the insertion needles; each closing-up device comprises a screw rod, a pair of stretching blocks and rotating handles, oneof the stretching block is fixed at one end of the screw rod, the other stretching block sleeves the middle of the screw rod, and the rotating handles are rotatably connected to the other end of the screw rod; the two insertion needles are inserted into the two stretching blocks at the same positions of the two closing-up devices; The skin stretching device has the advantages that the skin stretching device is compact in structure and convenient to use; when the skin stretching device is applied to skin stretching surgery, the device can fast and effectively shrink skin defects and reduce or heal wounds; in addition, the skin stretching device is low in cost, easy to manufacture, few in complications and capable of relieving pain.

The illustrative embodiment is a simulation system that provides realistic training and practice for vascular-access procedures without using human subjects. The simulator includes a data-processing system and a haptics interface device. The haptics device provides the physical interface for performing vascular-access procedures by manipulating a needle/catheter module to simulate needle insertion, etc. Some embodiments of the system include a palpation module, a skin-stretch module, or both. The palpation module provides an ability to practice palpation and occlusion techniques, while the skin-stretch module provides an ability to practice a skin-stretch technique.

The invention belongs to the field of forming and manufacturing of aerospace sheet metal parts, and relates to a ribbed tool and forming technology for forming of a double-curvature aircraft skin part. The tool is characterized by comprising a stretch-forming equipment upper workbench, an upper stretch-forming die, a plate material, a lower workbench, a clamping jaw, a stretch-forming die drawbeadand a lower stretch-forming die. The upper stretch-forming die is connected with the stretch-forming equipment upper workbench, the lower stretch-forming die is connected with the lower workbench, and convex rigs are additionally arranged on the stretch-forming dies. During skin stretch-forming, with the combination of pressure adjustment of the upper workbench and control over a friction lubricating mode, a blank maintains uniform bidirectional pulling force by changing the stress mode of the part through the drawbead, the uniformity and controllability of flowing of the part in the formingprocess are ensured, and rapid integral forming of the part with reverse double curvatures is realized.

The invention provides a buckle type skin stretching device and a skin stretching method. The device comprises a fixing member, a fixed stretching member and a suture buckle, wherein the fixing membercomprises a fixing-end main body, a plurality of soft tissue fixing needles are connected below the fixing-end main body, and a traction suture is arranged at the intersection of the soft tissue fixing needles. The fixed stretching member comprises a fixed-stretching-end main body, a sealing fixing piece and a guiding noose, wherein the upper portion of the interior of the fixed-stretching-end main body is provided with a cavity accommodating the sealing fixing piece; the lower end of the cavity is connected with a plurality of intradermal fixing needles; the sealing fixing piece is internally provided with a long hole through which the guiding noose penetrates; the upper portion of the fixed-stretching-end main body is provided with a round hole from which the guiding noose stretches out. The suture buckle comprises a handle and a suture buckle ring, and the tail end of the handle is connected with the front end of the suture buckle ring. The buckle type skin stretching device has the advantages that a wound surface is quickly closed, complications are reduced, all skin organs and corresponding functions thereof are reserved, and the device is easy to operate without damaging other healthy skin tissue and can be matched with a VSD device for use, reduce discomfort of patients and increase the recovery speed.

The invention discloses a preparation method of a graphene material based on a surface microstructure flexible substrate, provides a dual-channel flexible polymorphic stress sensor structure, which relates to a flexible polymorphic stress sensor structure and preparation. The sensor comprises upper and lower flexible substrates, upper and lower sensitive layers, upper and lower electrode layers and a packaging structure. The lower flexible substrate and the lower sensitive layer are a PDMS substrate subjected to surface microstructuring treatment and a graphene film formed on the surface of the PDMS substrate, and the lower flexible substrate and the lower sensitive layer are prepared through PDMS reverse molding and graphene brushing. The upper electrode layer comprises a silver electrode C and an electrode leading-out end thereof, and the lower electrode comprises silver electrodes A and B and electrode leading-out ends thereof. The prepared dual-channel sensor is used for realizing simultaneous detection of pressure and stress signals, and distinguishing and judging of human body actions under complex strain conditions such as joint bending, external force pressing and skin stretching can be realized. Meanwhile, the graphene material based on the surface microstructure flexible substrate is adopted, so that the stress detection range adapted to the sensor is optimized, and the sensor can work normally when human joints move freely.

A self adjusting flap is disclosed. The self adjusting flap comprises a solid body including a hinge. The flap includes a flexible skin stretched across an array of equi-spaced ridges on a convex surface of the hinged solid body, such that lift and drag forces due to fluid flow across it causes the flap to rotate about the hinge and automatically orient itself to minimize flow losses through turbulence while shielding objects downstream from flow induced drag.

The present invention discloses a set of equipment which comprises an extended and biologically compatible flexible support plate. The support plate comprises the following components: at least a series of holes which extend from a bottom part to a top part and are basically positioned adjacently with a first relative edge and a second relative edge of the support plate; a bent surface which extends from a surface of a base part of the support plate to the top part; a propulsion extension part which is basically positioned at a center line of the bent surface; and a releasable locking mechanism which is positioned along a vertical axis of the bent surface adjacently with the extension part. Therefore, the releasable fixing mechanism which positions first equipment and second equipment for contacting with the skin at the edge or adjacent part of opposite wounds and inserts the propulsion extension part of the first equipment into the second equipment facilitates skin extension, wound edge approaching, wound closing or combination thereof. The invention also discloses a method for promoting skin extension, wound edge approaching or wound closing in an object, and an external member which comprises wound closing equipment and at least one propulsion extension part.

The invention belongs to the technical field of technological equipment designing and manufacturing, and particularly relates to a skin stretch forming die and a manufacturing method thereof. The skinstretch forming die comprises a wooden structure frame, an epoxy resin-talcum powder surface and an epoxy resin-glass bead filling body; and the wooden structure frame is arranged at the periphery and the bottom face of the skin stretch forming die, the epoxy resin-talcum powder surface is arranged on the top face of the skin stretch forming die, the wooden structure frame and the epoxy resin-talcum powder surface form a hollow space, and the hollow space is filled with the epoxy resin-glass bead filling body. According to the skin stretch forming die and a manufacturing method thereof, the technological operation processes are simple, filling material sources are wide, the relative cost is low, the relative weight is low, and machining and using are convenient in the skin part stretch forming process.

The invention discloses an intelligent skin stretching device, and belongs to the technical field of medical instruments. The intelligent skin stretching device is composed of two hook elements and anelectric device which is controlled by an intellectualized program. Two specific embodiments are disclosed. The intelligent skin stretching device has the advantages that the intelligent skin stretching device is provided with the electric device which is controlled by the intellectualized program, thus traditional manual operation is replaced, and automatic stretching of skin on two sides of wounds and precise control are achieved, so that an operation effect which is more efficient, safer and better is obtained. The skin stretching device can turn large-spacing high-tension wounds (cuts) into small-spacing low-tension wounds (cuts), direct suturing is achieved, and the purpose of primary closure is achieved.

The invention discloses a hot working drawing method for Ti-V-Cr flame retardant titanium alloy, which relates to a processing method for metal materials, in particular to a hot working drawing method for flame retardant titanium alloy. It includes cutting the riser and bottom pad from the Ti-V-Cr flame retardant titanium alloy after ingot casting, which is characterized in that after the surface of the billet is closely matched with a closed metal sheath, it is heated to 900℃-1200℃ , heat preservation for 2-8 hours, in the process of heating and heat preservation, semi-open mold or closed mold hot processing is used, and then the skin is removed to complete the drawing process, and the deformation amount of each fire is 10%-30%. In the method of the present invention, before heating, a soft metal sheath should be used to cover the workpiece, and the sheath should be sealed to cut off the contact between the workpiece and the external atmosphere; in the process of heating and heat preservation, a semi-open mold (shaped drill) or a closed mold thermal processing method is used. , which increases the amount of deformation during processing and reduces the requirements for blank size under general processing conditions.