10results about How to "Avoid self-locking" patented technology

The invention provides a self-locking and anti-loosening structure of a photovoltaic support and a basic connecting piece, and relates to the technical field of self-locking and anti-loosening structures. The self-locking and anti-loosening structure of the photovoltaic support and the foundation connecting piece comprises a plurality of self-locking mechanisms, a plurality of anti-loosening mechanisms, two vertical rods, two cross rods and four connecting piece bodies, and the plurality of self-locking mechanisms comprise a plurality of bolts, a plurality of reinforcing rings, a plurality of upper nuts, a plurality of lower nuts and a plurality of limiting rings. The bolt is sleeved with the upper nut, the bolt is sleeved with the lower nut, when the bolt is sleeved with the lower nut, the limiting block slides into the limiting groove, the lower bolt can be rotated by upwards supporting the limiting ring, the embedded ring of the lower bolt enters the inner groove, the annular groove is clamped into the annular groove, and therefore the lower nut is fixed more firmly; and the limiting ring is clamped with the convex block due to the reduction of self weight, so that rotation is limited, the nut is self-locked and clamped more firmly, and the connecting piece main body is effectively prevented from loosening.

The utility model discloses a locking device for a civil air defense door in the technical field of civil air defense doors, which comprises a protective door and a locking block, the locking block is placed on the right side wall of the protective door, the right side wall of the protective door is provided with a mounting hole, and the left side wall of the inner cavity of the mounting hole is fixedly connected with a spring. A mounting block is fixedly connected to the right end of the spring, a plug pin is fixedly connected to the right side wall of the mounting block, a push rod is fixedly connected to the front side wall of the mounting block, the front end of the push rod penetrates through the mounting hole and extends to the front side wall of the protective door, and a handle is fixedly connected to the front side wall of the protective door. According to the locking device for the civil air defense door, the structural design is reasonable, the locking device can be quickly opened, the protective door can be conveniently used, self-locking of the protective door is avoided, and repeated opening and closing of the locking device are avoided.

The invention belongs to the technical field of rotary positioning devices, and discloses a five-shaft-head rotary positioning device which comprises a rotary positioning assembly installed at the end of a driving rotary assembly, a scrap removing assembly installed on the outer wall of the rotary positioning assembly, and a machining assembly installed at the end of the rotary positioning assembly. The driving rotating assembly is used for driving the rotating positioning assembly to rotate, the machining assembly is used for machining a workpiece, a second worm drives a driving rod to rotate, the driving rod drives a sliding sleeve to rotate, the sliding sleeve drives an extension shaft to rotate synchronously, and the extension shaft drives a positioning wheel to rotate synchronously. After rotation, the air cylinder pulls the extension shaft to rotate reversely through the rotating sleeve, and the extension shaft drives the positioning wheel to move reversely, so that the clamping groove in the positioning wheel can be accurately clamped with the gear teeth on the first gear. By means of the design, the defect that the self-locking effect is poor due to the fact that abrasion is prone to being generated when a traditional worm and a worm gear are self-locked can be overcome.

The application discloses a handle structure with a spiral curved surface lock, which is used for locking a plug and a socket of a fluid connector, a handle accessory of the handle structure is connected to the plug through a shaft pin, the handle accessory comprises a locking part, a spiral curved surface for guiding a locking column on the socket is arranged on the locking part, and a locking groove for fixing the locking column is arranged on the locking part, the locking groove is connected with the spiral curved surface, a convex part is arranged at a position where the spiral curved surface transitions to the locking groove, and the locking column is connected to the locking part from the bottom to the top of the handle structure; the force applying mode from the bottom to the top of the application overcomes the self-locking in the connecting process of the existing structure, thereby overcoming the defect that the connection is stuck; the structure that the inflection point is added in the locking groove ensures the locking, prevents the self-unlocking phenomenon from occurring in the use process, and overcomes the defect that the locking shakes through the limiting structure.

The utility model provides a PCB detection light source and a detection device, and belongs to the technical field of PCB detection. The PCB detection light source and the detection device comprise a light source shell and a pair of fixing seats, angle adjusting mechanisms are arranged on the two sides of the outer wall of the light source shell respectively, one ends of the two angle adjusting mechanisms are connected with one sides of the pair of fixing seats respectively, and each angle adjusting mechanism comprises a box body, a shaft rod, a worm, a worm gear and a rotary knob. One side of the box body is connected with one side of the fixing base, the two sides of the interior of the box body are rotationally connected with a worm and a worm gear respectively, the worm and the worm gear are meshed with each other, one end of the worm gear is sleeved with a shaft rod, one end of the shaft rod extends to the exterior of the box body and is connected with the outer wall of the light source shell, and the other end of the shaft rod is connected with the light source shell. The outer wall of the box body is rotationally connected with a rotary knob, one end of the rotary knob is connected with one end of the worm, and the light source shell comprises a shell body, a light source emitter and a reflecting mirror.

Provided is an optical module moving mechanism for reciprocating an optical module along an optical axis. The optical module moving mechanism comprises a supporting plate used for supporting an optical module; the motor is used for driving the rotor shaft; the first gear combination part comprises a plurality of gears, and the first gear combination part is used for transmitting the rotating force of the rotor shaft; the first driving screw is arranged in the mode that the axis direction is parallel to the optical axis direction, and the first driving screw is used for rotating around the axis through the rotating force transmitted by the first gear combination part; the first nut is screwed on the first guide screw and fixed to the supporting plate, and the first nut is used for enabling the supporting plate to move in a reciprocating mode by rotating the first guide screw; the first sleeve is fixed on the supporting plate as a cylindrical component, and a hole is formed in the cylindrical component; the first guide shaft is provided with an axis direction parallel to the optical axis direction, and the first guide shaft is inserted into the hole of the first sleeve; a first elastic body into which the first guide shaft is inserted in the extension / contraction direction, the first elastic body acting a first excitation force in a direction separated from the image sensor, and forming an image with light on the image sensor through the light module; the second guide shaft is provided with an axis direction parallel to the optical axis direction, and the second guide shaft is inserted into the hole of the supporting plate; and a second elastic body inserted by the second guide shaft in the extension / contraction direction, in which the second elastic body acts a second excitation force in a direction separated from the image sensor.

The invention relates to a gear (10), in particular a parking ratchet, comprising an annular body (1) having a first toothing portion (2) arranged on the outer circumference of the annular body for engaging a ratchet pawl (20) and a second toothing portion (3) arranged on the inner circumference of the annular body for positively locking connection with a shaft (30).

The present invention relates to the field of safety syringes, and specifically discloses an active self-locking syringe, including a syringe, a needle seat, a piston assembly, a piston rod protective cover, a needle tip protective cap, an injection needle, a needle tip protective sleeve, a spring, a guide limit assembly, an initial clamping assembly and a trigger ring plug. In the initial state, the trigger ring plug is located in a trigger cavity, and in the initial state, the trigger ring plug does not contact with the trigger part or contacts but not enough to allow the initial clamping assembly to separate from each other. The inner wall of the trigger ring plug is sealed with the needle seat, and the outer wall of the trigger ring plug is sealed with the inner wall of the syringe. In the above structure, the trigger ring plug is arranged in the trigger cavity, and the needle tip protective sleeve is released from the inside of the syringe near the patient end, so as to achieve the technical purpose of preventing the needle tip from being exposed and self-locking. The triggering method is cleverly designed, and there are no other auxiliary triggering components except the syringe and the needle tip protective sleeve. It has the technical advantages of simple structure, small radial size of the syringe, streamlined components and low production cost.

The invention discloses a switch machine gap monitoring device, and relates to the field of switch machine gap monitoring, the switch machine gap monitoring device comprises an indication rod and an air cylinder, the indication rod is fixedly provided with a convex shaft, the output end of the air cylinder is fixedly provided with a mounting plate, the mounting plate is provided with two monitoring mechanisms, and the two monitoring mechanisms are connected with the convex shaft. The mounting plate is further connected with an auxiliary positioning mechanism, the auxiliary positioning mechanism is connected with the self-locking mechanism, the monitoring mechanism comprises a fixed plate, a transverse rod, a movable block, a positioning hole, a movable plate, a first spring and a pressure sensor, the fixed plate is fixed on the mounting plate, and the transverse rod is fixed on the fixed plate. According to the switch machine gap monitoring device, the real-time monitoring mechanism is adopted, after the indication rod moves to the preset position along with the switch machine, the convex shaft is matched with the monitoring mechanism, the displacement change of the indication rod caused by train vibration can be monitored in real time through the monitoring mechanism when a train passes through, and therefore running safety is guaranteed.

An operating mechanism for a circuit breaker, belonging to the field of switchgear technology, includes a bracket, a trip latch, and a locking latch. A handle lever is oscillatingly mounted on the bracket. The trip latch and locking latch are rotatably mounted on the bracket, and they engage in a locking engagement. The trip latch has a locking engagement portion, characterized in that the locking engagement portion includes a straight engagement portion and a curved engagement portion. The length of the curved engagement portion is greater than or equal to 50% of the length of the locking engagement portion. When the circuit breaker is in the closed or open position, the engagement position of the trip latch and the locking latch is located on the straight engagement portion. When the circuit breaker is tripped, the locking latch rotates, and the engagement position of the trip latch and the locking latch moves from the straight engagement portion to the curved engagement portion until it disengages from the curved engagement portion, completing the tripping action. Advantages: It can prevent the circuit breaker from self-locking when tripping in the open position, ensuring the reliability of the circuit breaker's closing and opening tripping functions, and improving the stability of the operating mechanism.