53 results about "Jewel bearing" patented technology

The invention discloses a stop mechanism of a tourbillon, which comprises a tourbillon component, stop pincers, a stop pincers return spring and a control rod, wherein a central shaft of the tourbillon component is arranged on a substrate through a jewel bearing, the stop pincers are fixed in a watch movement through stop pincers axis bolts and connectors, and the front ends of the stop pincers are placed on two sides of the central shaft of the tourbillon; the stop pincers return spring is extruded at the rear end of the stop pincers and fixed in the watch movement through stop pincers return spring bolts and connectors; and the control rod is fixed in the watch movement through a control rod shaft and a connector, the inside end of the control rod is arranged in a groove of the stop pincers, and the outside end of the control rod is placed in a transverse groove of a clutch wheel or placed in a groove of a handle shaft through a connecting rod. The stop mechanism of the tourbillon has the advantages that the stop of the tourbillon is realized by clamping the central shaft of the tourbillon through the stop pincers, the start of the movement at a precise monument is ensured, the mechanism does not need to change the primary spring output torque of the movement, the structure is simple and reliable, and the stop mechanism is convenient to process and can meet the stop requirement of the tourbillon movement.

The invention provides bearing systems characterized by single point contact with each jewel segment and a spring-loaded assembly with protection from radial and thrust forces. An important feature of jewel bearings of the invention is that they are self-lubricating, i.e., no oil or grease lubricants are needed. This can be a major advantage in medical and precision equipment. A secondary important feature is the reduced friction and effective heat-dissipation due to the unique design of the invention with significant reduction in contact surfaces and friction, which significantly prolong the lifespan of the bearings. Another advantage of the present invention is the substantial reduction in audible noise due to the unique design. Furthermore, the invention allows the use of relatively low cost synthetic jewel segments in bearings.

The invention discloses a coaxial big-calendar display mechanism of a watch, wherein a hour wheel is arranged in the center of a dial plate and engaged with a date finger driving wheel, and a calendardate corrector, the date finger driving wheel and a date finger driving wheel shaft are pressed into a whole; a calendar wheel shaft, a calendar wheel, a units-digit change wheel and a tens-digit change wheel are positioned and pressed into a whole by position nails and rotate coaxially; a units-digit wheel and a units-digit character disk are pressed into a whole, a tens-digit wheel is fixedly arranged on a jewel bearing A on a clamping plate, and a tens-digit wheel shaft and a tens-digit character disk are pressed into a whole and rotate coaxially; and double-digit digits formed by the combination of single digits on the units-digit character disk and the tens-digit character disk are displayed by a date display window arranged on the dial plate. The coaxial big-calendar display mechanism reduces the frictional resistance produced by the rotation of the wheel shafts, ensures that the two character disks can flexibly replace the calendar and reduces the occupied space of the watch, thereby being more suitable for plane disposal and magnifying the display of the calendar. The mechanism can be arranged on the two-o'clock position, the three-o'clock position, the four-o'clock position, the six-o'clock position and the twelve-o'clock position of the watch. The whole watch is beautiful and decent and is convenient to use.