31results about How to "Limit depth" patented technology

The invention discloses a multi-freedom-degree drilling device used in the orthopedics department. The multi-freedom-degree drilling device comprises a first supporting base, a second supporting base, a first telescopic adjustor, a second telescopic adjustor, a first adjusting sleeve, a second adjusting sleeve, a first supporting rod, a second supporting rod, a first damping spring, a second damping spring, a first threaded adjusting rod and a second threaded adjusting rod. A top supporting plate is installed at the upper ends of the first supporting rod and the second supporting rod, a sliding track is installed at the lower end of the top supporting plate, a sliding seat is installed on the sliding track in a sliding mode, an air cylinder is installed at the lower end of the sliding seat, the first supporting rod is fixedly installed on the left side of the air cylinder, the second supporting rod is fixedly installed on the right side of the air cylinder, a rotating motor is installed between the first supporting rod and the second supporting rod and drives a rotating shaft to rotate, a drilling head is installed at the lower end of the rotating shaft, and an elastic sleeve is arranged outside the rotating shaft. A base is arranged below the drilling head.

The invention discloses a detachable implantation instrument and an operation method thereof. The detachable implantation instrument comprises a first connecting element and a second connecting element, wherein one end of the first connecting element is provided with an anchoring portion, and the other end of the first connecting element is provided with at least one first connecting portion extending in the axial direction; the side wall, close to an end of the first connecting element, of the second connecting element is provided with at least one second connecting portion extending in the radial direction; after the anchoring portion anchors human tissue, the first connecting element is pulled to the second connecting element, and then the first connecting element is rotated along the axis of the first connecting element so that the first connecting portion and the second connecting portion can be in clamped connection. The effect of locking two connecting pieces at any angle can be achieved; after clamped connection, the clamping angle of a clamping component of the implantation instrument can be adjusted, and the safety and operation convenience of an operation are improved; after the two connecting elements are locked, unlocking can be conducted at any time, and an operator can position a target point again; the locking stability is improved by adopting a double-connection mode; and the detachable implantation instrument is simple in structure and low in production cost.

The invention discloses an embedded plant drug injection device, comprising: an air bag, the air bag is sheathed on one end of a tough rod, and the outer surface of the air bag is provided with a plurality of needle bodies, part or all of the air bag is placed on the Pushed by the tough rod, it is stuffed into the cavity of the plant body. The end of the tough rod in the air bag is provided with a support ring, and the tough rod is provided with an air path connecting the inside and outside of the air bag. The needle can contact the side wall of the chamber when the balloon is inflated. The device of the invention can widely contact the plant lesion area or plant parts, and relatively uniformly or concentratedly supply nutrients or release medicines to the plant parts or lesion areas.

A spinning rotor (1) for an open-end spinning machine (4) has a rotor shaft (2), via which the spinning rotor (1) is able to be driven by means of a belt (3), in particular a tangential belt. The rotor shaft (2) has a contact region (7) for the belt (3). In the contact region (7), the rotor shaft (2) has a friction-enhancing lining (8) made of an elastomeric material. In an open-end spinning machine (4) having a spinning rotor (1) and having a belt (3), in particular a tangential belt, for driving the spinning rotor (1), the spinning rotor (1) is provided with a friction-enhancing lining (8) made of an elastomeric material.

The invention provides a device and a method for testing diffusion performance of oil-gas components in a pore medium. The testing device comprises a communicating valve, wherein the communicating valve is clamped between testing cores in a core clamping device; the testing cores are arranged on two sides of the communicating valve; the communicating area of the communicating valve is more than or equal to 1 / 2 of the cross sectional area of the testing cores; fluid can be respectively injected into the testing cores which are positioned on the two sides of the communicating valve through the clamping device; and the testing cores positioned on the two sides of the communicating valve are controlled to be communicated with or separated from each other through the communicating valve. Because the communicating valve is arranged between the two testing cores, the initial diffusion moment of the components can be strictly controlled, and the measurement accuracy is improved; static diffusion property measurement under pore medium conditions can be realized; and moreover, the reaction can be stopped and other fluid involved testing research can be carried out according to the design under control of the valve.

A precision cutting device and cutting method for construction joints of fair-faced concrete walls, including a cutting machine support frame and a cutting machine fixed on the cutting machine support frame, the cutting machine support frame includes rectangular end plates on both sides and connected between the rectangular end plates Two high-hardness sliders and two formwork strips in between, the two high-hardness sliders and two formwork strips are located at the four corners of the rectangular end plate, the cutting machine has a sliding seat, and the two high-hardness sliders Pass through the perforations on the sliding seat respectively, and fix the cutting machine on the cutting machine support frame. The board surface where the template strip is located is parallel to the plane where the cutting saw blade of the cutting machine is located. Floor cutting joints and wall cutting joints cutting. The invention has strong mobility, simple operation, safety, and light weight. The limit cutting machine is supported by the cutting machine, and the protruding length of the cutting saw blade is pre-designed to limit the depth of the cutting seam and can cut accurately.

A trephine having a limiting sleeve (100), comprising a motor (200), an internal trephine, and at least one trephine sleeve (110); the trephine sleeve (110) is in rigid connection with a motor housing (208); the internal trephine is nested in the trephine sleeve (110) by means of at least two bearings (108, 112) and is driven, by means of the motor (200), to rotate; the internal trephine comprises a trephine drill bit (102), a connecting rod shaft (104), a coupling A (106), and a coupling pin (107); the trephine drill bit (102) is provided at one end of the connecting rod shaft (104), trephine sawteeth (130) are provided at the front end of the trephine drill bit (102), the trephine sawteeth (130) can extend out of the front end face (126) of the trephine sleeve for a certain distance, and the other end of the connecting rod shaft (104) is connected to a motor rotating shaft (206) by means of the coupling A (106) and the coupling pin (107). The external trephine sleeve (110) defines and adjusts the cutting depth (122a) of the internal trephine, while protecting a surgery operator and the tissue around a surgical site from being injured by a trephine rotating at a high speed; moreover, by drilling using the trephine having a limiting sleeve (100), a bone flap can be completely removed and retrieved from a trephined bone. The present invention realizes standardization and repetition of cranial defect (502) and drilling surgery, and makes the surgery simple, easy to operate, safe and reliable, efficient, and is less traumatic.

The invention relates to a double-headed scalpel with protective covers. The double-headed scalpel comprises a handle, a first blade, a second blade and two protective covers, wherein the first blade and the second blade are arranged at the two ends of the handle respectively, and each protective cover comprises a pin rod, a first protective piece, a second protective piece, a first elastic piece and a second elastic piece. Pin holes are formed in the scalpel back, and the pin rods are positioned in the pin holes and are in tight contact and match with the pin holes. The inner ends of the first elastic pieces and the inner ends of the second elastic pieces are connected with the upper portions of the pin rods respectively, the upper portions of the first protective pieces and the upper portions of the second protective pieces are connected with the outer ends of the first elastic pieces and the outer ends of the second elastic pieces respectively, and the lower ends of the first protective pieces and the lower ends of the second protective pieces are provided with blunt portions facing cutting edges. By means of the two blades, demands for cutting various tissues are met, and delay of operations is avoided. The protective covers protect the cutting edges, so that the safety of the double-headed cutting edges is ensured. The blunt portions at the lower ends of the first protective pieces and the lower ends of the second protective pieces form blocking surfaces to limit the feeding depth of the scalpel, so that the operations are more accurate, patients' pain is alleviated, and the double-headed scalpel is safer and more reliable.

The invention relates to a scalpel with a limiting protection function. The scalpel comprises a scalpel handle, a blade, a bottom plate, a support, a rotating shaft and at least one lifting mechanism. The blade is mounted at the lower end of the scalpel handle, the support is mounted on the bottom plate, and a notch is formed in the upper end of the support; the upper end of the scalpel handle is rotatably mounted in the notch through the rotating shaft, the blade extends to the position below the bottom plate from the edge of the bottom plate, the lifting mechanism is mounted on the bottom plate, and a power output end of the lifting mechanism is connected with the middle-lower portion of the scalpel handle. The bottom plate, the support and the lifting mechanism are provided, the bottom plate is used as a supporting face and a reference plane of the scalpel, and the lifting mechanism is used for adjusting the exposing size of the blade below the bottom plate, so that the scalpel feeding depth is limited, the condition that the scalpel is fed to shallow or too deep is avoided, an operation is more precise, pain of patients is reduced, and the scalpel is safer and more reliable; in addition, the lifting mechanism is used for adjusting the exposing size of the blade anytime, and the scalpel feeding depth is adjusted anytime according to requirements of operations.

A gun mirror and a coating method thereof. The gun mirror comprises: a gun mirror tube body, which is used for observing a target; a connecting part is connected with the gun mirror tube body, and is used for fixing the gun mirror tube body on the gun body; A sealed tubular cavity, and the connecting part is evenly provided with a plurality of openings in the circumferential direction; the elastic expansion film is attached and arranged in the connecting part; when the inner cavity of the connecting part is inflated, the elastic expansion film protrudes from the opening position out, so as to abut with the inner cavity wall of the insertion slot on the gun body; the inflation port is arranged on the connecting part and communicates with the inner cavity of the connecting part; the inflation port is provided with a one-way valve, and the one-way valve is used for The external gas is allowed to enter the inner cavity of the connection part, and the gas in the inner cavity of the connection part is prevented from leaking out. The above structure solves the technical problem in the prior art that when the gun mirror is inserted and fixed on the gun, the position of the gun mirror will shake relative to the gun, resulting in the reduction of the firing accuracy of the gun.