33results about How to "Firmly restrained" patented technology

The invention relates to an optical connector for connecting optical fibers. Said connector comprises a housing which is provided with a first opening for an optical cable comprising an optical fiber to be connected, and a second opening, through which the end of the optical fiber outwardly protrudes from the housing. The second opening can be closed by a lid which can be pivoted between a first position in which it closes the second opening, and a second position in which it frees the second opening. Spring elements are provided for prestressing the lid in the closing direction. The aim of the invention is to simplify the structure and especially the assembly of one such connector. To this end, the spring elements comprise a laminated spring.

A fixing mechanism includes a first engaging portion, a base, a first latch and a resilient component. The first engaging portion is disposed on a frame, the base is disposed on a casing, and the first latch is slidably disposed on the base. The first latch includes a first body, a second engaging portion and an inclined structure. The second engaging portion is disposed on the first body to engage with the first engaging portion, so as to constrain a movement of the frame relative to the casing. The inclined structure is disposed on the first body. The first engaging portion can slide relative to the inclined structure, so as to move the frame away from the casing. Two ends of the resilient component are respectively connected to the first latch and the base. The resilient component drives the second engaging portion to engage with the first engaging portion.

A fixing mechanism includes a first engaging portion, a base, a first latch and a resilient component. The first engaging portion is disposed on a frame, the base is disposed on a casing, and the first latch is slidably disposed on the base. The first latch includes a first body, a second engaging portion and an inclined structure. The second engaging portion is disposed on the first body to engage with the first engaging portion, so as to constrain a movement of the frame relative to the casing. The inclined structure is disposed on the first body. The first engaging portion can slide relative to the inclined structure, so as to move the frame away from the casing. Two ends of the resilient component are respectively connected to the first latch and the base. The resilient component drives the second engaging portion to engage with the first engaging portion.

The invention discloses an unmanned grabbing segmental beam lifting appliance and a construction method thereof. The unmanned grabbing segmental beam lifting appliance comprises a lifting beam; the distribution beam is arranged right below the hoisting beam in parallel; the transverse moving mechanisms are arranged at the bottom of the distribution beam at intervals, and any transverse moving mechanism slides in the length direction of the distribution beam; the longitudinal moving mechanisms are arranged on the corresponding transverse moving mechanisms at intervals, and any longitudinal moving mechanism slides in the width direction of the distribution beam; the plurality of padlock hanging rods are respectively connected with the plurality of longitudinal moving mechanisms, and any padlock hanging rod is used for automatically locking the segmental beam hanging hole; contact wheels of the multiple sets of auxiliary alignment devices press the side walls of the segmental beams inwards from the two sides. The hoisting stability is guaranteed through cooperation of the distribution beam and the multi-point hoisting structure, rapid alignment adjustment of the padlock hoisting rod and a segmental beam hoisting hole is achieved through cooperation of the transverse moving mechanism, the longitudinal moving mechanism and the auxiliary alignment device, the padlock hoisting rod and the segmental beam can be automatically locked or unlocked, the manual operation amount is greatly reduced, and the hoisting efficiency is improved. And the hoisting efficiency and the hoisting quality are improved.

A supporting apparatus such as a portable seat that can be opened and closed is disclosed having a plurality of poles hinged to junctions. A part of the poles form the legs and another portion form an anchorage on which a foldable surface is stretched when the apparatus is opened. The apparatus also includes traction elements cooperating with the folding surface and which join one another at the end of the poles that do not converge at the junctions. The configuration preset by the orientation of the poles, along with the structural configuration of anti-prism or other extremely stable and rigid configurations, are such that they spread most of the torsional and bending stresses.

The invention discloses a combined buckling-restrained support with multiple yielding sections and multiwave core units and belongs to the field of building structure techniques and earthquake resistance and shock absorption of structures. A structural system comprises a straight plate core unit, small wave bend plate core units, large wave bend plate core units, stiffening ribs, limiting clips, cross steel tubes, cement-emulsified asphalt mortar, square end plates, hinge joints, node plates, anchor plates and the like. A supporting core unit comprises a straight plate core unit, two small wave bend plate core units and two large wave bend plate core units. The cross steel tube serves as a restraining unit. The cement-emulsified asphalt mortar fills the gaps between the restraining unit and the core units. The support is connected to the node plates on a main body structure through the hinge joints. Multi-yielding of the buckling-restrained support is achieved, so that the support hasrelatively good energy consumption performance in small medium and large earthquakes. The core units have good fatigue performance and are hardly broken. A novel filling material can provide a more stable restraining function to the core units.

The invention discloses an orthodontic bracket including a bracket body having a slot into which an orthodontic wire is inserted; a bracket cover mounted on the bracket body and configured to open andclose the slot; and a ligating member provided in the bracket cover and configured to selectively block the slot so as to confine the orthodontic wire in the slot. The orthodontic bracket may precisely and consistently transmit force, for example, torque, of the orthodontic wire to a tooth, and minimize or prevent factors contributing to failure, such as deformation of or damage to the ligating member due to opening and closing of the slot.

The invention discloses a test member capable of providing axis load fixed support for a universal testing machine. The test member capable of providing the axis load fixed support for the universal testing machine comprises a top seat and a base. A semicircular ball is fixedly connected with the lower portion of the top seat through bolts. Four upper supports are fixedly arranged on the outer side wall of the semicircular ball at intervals. A ball-shaped groove which corresponds to the semicircular ball is formed in the base. Lower supports which correspond to the upper supports are fixedly arranged on the side wall of the base. Booms are connected between the upper supports and the lower supports. The booms are connected with the upper supports and the lower supports in a threaded mode. The test member capable of providing the axis load fixed support for the universal testing machine is capable of effectively avoiding influences on analog fixed support boundary condition and function susceptibility of providing axis load by the special member which is applied to the bottom of the test member to simulate fixed support boundary axis load due to the size of the semicircular ball, being conveniently applied to the test members with different sizes due to the fact that the manufactured special member with the appropriate size is fixed at the upper portion of the universal testing machine and effectively saving test cost.

The invention discloses a piezoelectric sounding structure and a mobile terminal, and relates to the technical field of loudspeakers. The piezoelectric sounding structure includes a PCB board and at least one piezoelectric ceramic tightly bonded to the PCB board. The piezoelectric ceramic is used to generate mechanical deformation through the inverse piezoelectric effect under the drive of the drive circuit. The tightly bonded PCB generates controlled mechanical vibration; and the vibration is transmitted by the PCB or the outer shell of the terminal device tightly bonded with the PCB and further pushes the air to generate sound. The present invention also proposes a mobile terminal having the above-mentioned piezoelectric sounding structure, the inner side of the housing of which is closely combined with the piezoelectric sounding structure mentioned in the present invention. The piezoelectric sounding structure provided by the present invention can greatly improve the sound radiation efficiency because the entire PCB board or the outer casing of the terminal structure can radiate sound waves, and can reduce the volume of the sounding structure while ensuring the volume and sound effect.

The invention discloses an orthodontic bracket, comprising: a bracket body having a slot into which an orthodontic wire is inserted; a bracket cover mounted on the bracket body and configured to open and close the slot; and A restraining member disposed in the bracket cover and configured to selectively block the socket to restrain the orthodontic wire in the socket. The orthodontic bracket can accurately and consistently transmit orthodontic wire forces, such as torque, to the teeth, and minimize or prevent failure-causing factors, such as deformation or damage to the restraint member caused by opening and closing of sockets.

The invention belongs to the technique of design of mechanical systems of aircrafts and relates to a heading installation structure for a gas cylinder of an aircraft. The heading installation structure for the gas cylinder of the aircraft is composed of the gas cylinder (1), a base (2), two bottom supports (3), two clamps (4) and cushions (5). The neck and the bottom of the gas cylinder (1) are clamped through the clamps (4), so that displacement of the neck and the bottom of the gas cylinder (1) is prevented. The gas cylinder (1) is limited through the base (2), so that axial displacement of the gas cylinder (1) under a high overload condition is prevented. The clamps (4) and the bottom supports (3) are connected in a riveted mode. The cushions (5) adhere to the clamps (4) and the base (2) correspondingly. The supporting surface on the base (2) is in the shape of a two-dimensional curved surface and is in complete fit with the appearance of the gas cylinder (1). By the adoption of the heading installation structure for the gas cylinder of the aircraft, the effect that the gas cylinder can be firmly retrained on a supporting base under the high overload condition during landing and the like of the aircraft is guaranteed, and high overload protection for heading installation of the gas cylinder of the aircraft is achieved; the problem that according to a traditional clamp form, the stability of the gas cylinder cannot be guaranteed during heading installation of the gas cylinder is solved, and the maintainability and safety of the gas cylinder are effectively improved.

Provided is a seat belt device, which can reliably eliminate slack of the lap belt and obtain a sufficient restraining effect on the occupant even if the two pretensioners operate in two stages. First, actuate the pretensioner (9) of the seat belt retractor (3), while pulling the shoulder belt ( 4b) and the lap belt (4c). Then, the pretensioner (10) of the lumbar fixing part (4a) is actuated, and the seat belt (4) is stretched to the side of the lumbar fixing part (4a), and the one-way tongue (5) is applied to the seat belt (4). 4) Clamp and lock it. Thereby, the shoulder belt (4b) cannot be moved to the lap belt (4c) side by the tongue piece (5). Therefore, the slack of the lap belt (4c) can be reliably eliminated, and the waist of the occupant can be firmly restrained.