34 results about "Quartz clock" patented technology

The invention discloses a temperature control method, device and equipment for semiconductor equipment and a storage medium, and relates to the technical field of temperature control, and the method comprises the steps: calculating the equivalent radiation temperature of the brightness of a slit cavity observation band based on the brightness of the slit cavity observation band in an edge infrared observation annular region of a rapid heat treatment furnace and the surface emissivity of a wafer; solving the equivalent temperature of the inner edge of the quartz clock cover; on the basis of the equivalent radiation temperature and the equivalent temperature of the inner edge of the quartz clock cover, net radiation heat incoming power transmitted to a wafer edge belt of the wafer by an annular slit radiation cavity in the rapid heat treatment furnace is calculated; and solving a target lamp area power replacement vector of the rapid heat treatment furnace based on the net radiation heat incoming power. According to the invention, the initiative and accuracy of wafer edge temperature control can be improved.

1. The name of the product with this design: Quartz clock (fashionable and simple corrugated alarm clock). 2. Purpose of the product with this appearance design: This product with this appearance design is used for telling time and as a home decoration. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5. The design for which protection is sought includes color.

The invention discloses a method for prolonging the on-machine service life of a quartz clock cover of PVD (Physical Vapor Deposition) equipment. The method comprises the following steps: S1, cleaning the quartz clock cover for the first time; s2, the quartz clock cover is subjected to sand blasting treatment; s3, cleaning the quartz clock cover for the second time; s4, the quartz clock cover is subjected to spraying treatment, and a coating is formed on the surface of the quartz clock cover; wherein in the step S4, Y2O3 powder is used for spraying the quartz clock cover. According to the method for prolonging the on-machine service life of the quartz clock cover of the PVD equipment, the coating is formed on the surface of the quartz clock cover, so that the adsorption force of attachments on the surface of the quartz clock cover is better, quartz chippings cannot fall off, the service life of a PVD machine table can be prolonged, and the wafer yield is improved.

The utility model provides a double-shaft hole type noise reduction movement. The quartz clock movement comprises a motor wheel, a first third wheel and a second third wheel, gear shaft holes are formed in the two sides of the first third wheel, a positioning shaft is arranged on a gear seat matched with a gear provided with a shaft hole, and the positioning shaft is arranged in the gear shaft holes in a sleeving mode and is in clearance fit with the gear shaft holes; the gear provided with the gear shaft hole is made of a soft material. The gear shaft holes are formed in the two ends of the silencing wheel, the positioning shaft is arranged at the corresponding position corresponding to the cover plate or the positioning clamping plate, so that the relative positions of the silencing wheel and the positioning shaft in the axial direction have high stability, and particularly, the hard shaft which penetrates through the silencing wheel and is in tight fit with the silencing wheel has the following advantages that the yield is high; irreversible deformation of the wheel body or damage caused by other situations can be easily caused in the assembling process; 2) the mold opening cost is low;

The utility model provides a gas-phase heavy doping device which comprises a quartz clock cover, the quartz clock cover is provided with an overflow opening, and the overflow opening is arranged opposite to a to-be-doped object; the quartz clock cover comprises a cover shell side wall, a first flow guide part is arranged at the end, close to the overflow opening, of the cover shell side wall, and the first flow guide part is bent towards the interior of the cavity of the quartz clock cover along the cover shell side wall so as to reduce the opening size of the overflow opening. By adopting the doping device, clean protective gas on the outer side of the bell jar is blown to the liquid level from top to bottom, a rotating vortex is formed below the outer side of the frustum, and the vortex can realize gas sealing, so that mixed gas containing dopants on the inner side of the bell jar is difficult to flow into or diffuse to the outer side of the bell jar, the use of the dopants can be effectively reduced, the cost is reduced, and the service life of the bell jar is prolonged. And the doping efficiency is improved.

The utility model relates to the technical field of quartz clock installation, in particular to a quartz clock convenient to hang, which comprises a front plate, a decorative frame, a rear bottom frame, four hooks and a connecting component, the rear bottom frame is provided with an internal corner hanging hole and an external corner hanging hole, is detachably connected with the front plate and is provided with four lock hook holes, and the connecting component is connected with the decorative frame. When the decorative frame is used, the decorative frame is placed above a front plate and locked and fixed through the connecting assembly, then the four hooks are inserted into the corresponding lock hook holes respectively and then rotated to be hooked and fixed, the internal corner hanging hole is used for fixing a 90-degree internal corner of a wall root, and the external corner hanging hole is used for fixing a 270-degree external corner of a wall. Through the multi-direction hanging structure arranged on the back face, the wall clock can be installed at different positions of internal corners and external corners of a wall face, the problem that a traditional wall clock can only be installed on a flat wall face is solved, the space utilization rate is improved, and the wall clock is suitable for special scenes such as small apartments, corridor corners and stand column wrap angles.

The wall-mounted clock comprises a clock frame and a connecting frame, the left side and the right side of the clock frame are provided with first openings, the interior of the clock frame is fixedly connected with an isolation plate, the middle of the isolation plate is provided with a second opening, the rear portion of the clock frame is fixedly connected with a sealing plate, and the sealing plate is fixedly connected with the connecting frame. A quartz clock movement is connected to the front portion of the sealing plate in a penetrating mode, a movement output end is arranged in front of the quartz clock movement, a buffer pad is fixedly connected to the rear portion of the sealing plate, a dial plate is fixedly connected to the front portion of the isolation plate, connecting blocks are fixedly connected to the two ends of the connecting frame, and rotating shafts are fixedly connected to the interiors of the connecting blocks. And an opening is formed in the upper part of the connecting frame. Through the structure, long-time hanging can be carried out, the whole clock is prevented from falling off due to oxidation, isolation can be arranged between the clock rear shell and the wall body, and the rear shell is prevented from being in direct contact with the wall body.

The utility model provides a back hanging type quartz clock movement, which comprises a front cover body, a travel time assembly and a rear cover body, and the travel time assembly is arranged between the front cover body and the rear cover body. The rear cover is characterized in that the area of an installation area of the travel time assembly on the rear cover body is smaller than 80% of the area of the inner side face of the rear cover body, and the corresponding area of a blank area of the rear cover body which does not cover the travel time assembly is larger than 20% of the area of the inner side face of the rear cover body; the blank area is provided with a hanging part, and one or both of the front cover body and the rear cover body is provided with a reinforcing part of the hanging part. The utility model innovatively provides a new scheme of arranging the suspension position on the rear cover body of the movement. The change not only greatly optimizes the internal structure layout of the movement, so that the movement keeps the original functional integrity, but also can obviously reduce the occupied space of the movement in the clock body, thereby improving the design freedom degree of the clock body and providing possibility for designing more compact and delicate clock products. Besides, as the hanging position is arranged on the rear cover body, the hanging position does not exceed the cover body of the machine core and is hidden, the logistics packaging box of the machine core is correspondingly shrunk, consumption of packaging materials is reduced, and urgent requirements of the current society for green and environment-friendly production are met.

A positioning device of an epitaxial furnace comprises a first positioning piece, a second positioning piece and a third positioning piece, the first positioning piece is fixed to the top surface of a flange through a connecting structure, and a mounting hole is formed in the positioning piece; the second positioning piece is located in the mounting hole, and the second positioning piece is used for fixing the distance between the top surface of the downstream end of the quartz cylinder and the top surface of the flange, so that the quartz cylinder is positioned at the corresponding position. The distance between the top surface of the downstream end of the quartz cylinder and the top surface of the downstream end of the quartz bell jar is fixed by arranging the first positioning piece fixed on the top surface of the flange and positioning one end in the mounting hole of the first positioning piece and positioning the other end on the top surface of the downstream end of the quartz cylinder; therefore, the position of the quartz cylinder can be quickly fixed at the corresponding position, the position of the quartz cylinder does not need to be adjusted for multiple times, the positioning accuracy of the position of the quartz cylinder is improved, and the positioning accuracy of the position of the reaction chamber and the production process efficiency are further improved.

The utility model provides a low noise quartz clock movement, the quartz clock movement comprises a motor gear, a first third wheel, a second third wheel and a travel time gear train, only the first third wheel is provided with a shaft hole with a gear shaft, and the first third wheel is made of soft and oil resistant material; the diameter of the gear shaft hole and the diameter of the positioning shaft are both smaller than 2 mm, especially smaller than 1 mm and larger than 0.5 mm. The quartz clock movement is provided with one or more gears with gear shaft holes, the requirement for manufacturing gear materials is lowered, the quartz clock movement is further provided with a gear space made of soft materials, and therefore the quartz clock movement has the design space for further lowering noise. According to the design scheme that only the first third wheel is made of soft materials and is provided with the gear shaft hole, matching of the motor wheel and the travel time wheel train is efficiently maintained, meanwhile, the buffering effect on the motor wheel is achieved, the root of generated noise is precisely solved, and meanwhile the technical advantages of a mainstream movement are kept.

The invention discloses an oscillation circuit of a quartz clock system. The oscillation circuit comprises an oscillation circuit, a frequency hopping control circuit, a compensation circuit, a delay circuit, a clock monitoring circuit and a power switching circuit, the oscillation circuit is used for outputting a clock signal, the temperature characteristics of the first resistor and the second resistor are the same, and the compensation circuit is connected with a target node and used for adjusting the temperature characteristics of the voltage of the target node, namely, the temperature characteristics of the clock signal are compensated under the condition that the temperature characteristics of the first resistor and the second resistor are the same. The output frequency of the clock signal meets the preset temperature drift; whether an external clock is accessed or not can be automatically distinguished, and a corresponding same-frequency mode signal is generated to control one of the first switching device and the second switching device to be switched on; and when no external clock is detected to be accessed, the device works in a mode of setting frequency by an external resistor. When an external clock is accessed, the device can automatically work in a mode of synchronizing the external clock.

The utility model relates to the technical field of quartz wall clock processing equipment, and discloses a surface paint spraying device for quartz wall clock processing, which comprises a processing seat, the top of the processing seat is fixedly connected with a clamping mechanism, and the bottom of the processing seat is fixedly connected with a paint spraying mechanism; the supporting assembly comprises a motor, the motor is fixedly connected to the top end of the machining base, an electric pole is fixedly connected to one end of the motor, a supporting round block is fixedly connected to one end of the electric pole, an arc-shaped plate is arranged in the supporting round block, a clamping block is fixedly connected to the right end of the arc-shaped plate, and a supporting ring base is fixedly connected to the left end of the arc-shaped plate. According to the surface paint spraying device for quartz wall clock machining, a motor can be started to drive an electric pole to rotate, and finally a clamping block and a quartz clock body can be driven to correspondingly rotate, so that on one hand, the situation that in an original scheme, moving wheels are attached to the surface of a clock, and consequently the surface of the clock is scratched is avoided; and on the other hand, paint spraying on the quartz clock is facilitated.

The present disclosure provides for "Cellular Base Station Independent V2X Cellular Communication Synchronization and Initialization." A cellular vehicle-to-anything (C-V2X) [including V2V] communication system obtains positioning and time data from one or more GNSS signals and retrieves cellular synchronization information (including but not limited to 3GPP MIP and / or SIB) from a pre-loaded database and uses the information to establish a C-V2V connection with another vehicle. Synchronization can be repeated after expiration of a time period. The time period can be selected according to the positioning and speed of the vehicle. Other sources of time data can be used when GNSS signals are not available, such as an internal quartz clock or timing from a cellular base station.

The utility model relates to coating equipment for special materials of quartz clocks, which belongs to the field of quartz clocks and comprises a worktable, a box is fixedly mounted at the top of the worktable, a translation mechanism is mounted in the box, a cylinder is mounted at the top of the worktable, a support plate is fixedly connected to the telescopic end of the cylinder, and a support is mounted on the support plate. The top of the supporting plate is provided with an adjusting mechanism. According to the smearing equipment for the special material of the quartz clock, by arranging the adjusting mechanism and the translation mechanism, a spray gun can be driven to move front and back through an electric guide rail, a lead screw is driven to rotate through a driving motor, and then the spray gun can translate left and right, so that the position of the spray gun is conveniently adjusted; the driving gear is driven by the servo motor to rotate, so that the driven gear can rotate to drive the rotating block to rotate, the inclination angle of the clock shell is adjusted, the spraying range is widened, corner positions are conveniently sprayed, and spraying dead corners are avoided.

The utility model relates to the technical field of quartz clock movements, in particular to a pair of quartz clock movement part cutting positioning pliers, which comprises a rotating component, an impurity collecting component and a clamping component, and is characterized in that the rotating component consists of a fixing frame, a connecting rod, a clamping block, a clamping groove, a bearing and a base, a bearing is installed on the surface of the connecting rod, and a base is arranged on the surface of the bearing. According to the quartz clock movement part cutting positioning clamp, through the arrangement of the fixing frame, the connecting rod, the clamping block, the clamping groove, the bearing and the base, when the quartz clock movement part cutting positioning clamp is used, a user manually rotates the fixing frame to drive the connecting rod to rotate in the bearing so as to conveniently adjust the cutting angle, and the clamping block fixed by the fixing frame can be clamped with the clamping groove after rotating to a designated position; and the device can be stably supported through installation of the base, the user can easily adjust the cutting angle of the part, and the whole device does not need to be frequently moved.

The utility model discloses a vehicle-mounted intelligent clock capable of being modularly installed, and belongs to the field of vehicle-mounted equipment. Comprising a display module capable of displaying electronic information, a control module with a control function and a face frame capable of being installed in an original vehicle clock groove, the display module is fixedly installed on the front face of the face frame, the control module is fixedly installed in the face frame, and the display module is connected with the control module. Compared with the prior art, by arranging the face frame capable of being installed in the original vehicle clock groove, the display module capable of displaying electronic information replaces a quartz clock of an original vehicle, a clock dial can be simulated to display time, other information can also be displayed, and therefore intelligent upgrading of the original vehicle clock is achieved; meanwhile, the elastic clamping block can be arranged on the face frame according to a clock groove of a specific vehicle type, modular installation is achieved, and upgrading operation of the vehicle-mounted clock is more convenient.

The present invention relates to the technical field of watch movement, and in particular to a firmly assembled quartz watch movement structure. The present invention embeds a C-shaped insert into the structure of a sub-gear and a sub-wheel tube to realize the axial fixed connection between the sub-wheel tube and the sub-gear, so that the two are not easily separated and fall off, thereby realizing the tight assembly of the sub-gear, and after the connecting tube is embedded in the through hole in the center of the sub-gear, the insert can be stuck in the gap between the sub-gear and the connecting tube, so that the insert is not easily separated from the sub-wheel tube and the sub-gear. In addition, the present invention uses a knurling structure on the annular surface of one end of the second shaft so that when the second shaft is inserted into the through hole of the second gear, the knurling can increase the friction resistance between the second shaft and the through hole of the second gear, and because the outer diameter of the knurling is interference fit with the through hole, the second shaft and the second gear can be stuck tightly and will not fall off, so that the assembly of the second shaft and the second gear is more secure, thereby improving the service life of the quartz watch movement.

The utility model discloses an ultrathin quartz clock movement, which relates to the technical field of quartz clock movements, and comprises a two-wheel and a minute / third wheel which are rotationally connected in a mounting space formed between an upper clamping plate and a lower clamping plate; the middle clamping plate is located between the upper clamping plate and the lower clamping plate, the second wheel and the minute wheel are located at the same axial position, the fourth wheel is rotationally connected in the mounting space and located below the middle clamping plate, one side of the fourth wheel is in meshed connection with the third wheel, and one side of the third wheel is in meshed connection with the second wheel; according to the utility model, the two-wheel and the minute / third wheel are arranged at the same axial position and are reasonably arranged with the middle clamping plate, so that the axial thickness is greatly reduced, and the ultra-thinness is realized. The space formed by the upper clamping plate and the lower clamping plate provides a stable installation and rotation environment for parts. The middle clamping plates are arranged in a layered mode, so that gear trains are arranged in order, space utilization is optimized, normal meshing transmission of the gear trains is guaranteed, a movement is kept compact and stable, and timing accuracy is guaranteed.

The utility model relates to the technical field of quartz clock movements, in particular to a novel quartz clock movement, which comprises a casing, a driving bin is arranged on the casing, a time adjusting knob is arranged at one corner of the driving bin, a battery bin is arranged below the driving bin, protective corner plates matched with each other in specification are arranged at the four corners of the casing, and the protective corner plates are arranged on the casing. A protective corner plate is arranged on the front side of the battery bin, a connecting assembly is arranged between the protective corner plate and the machine shell, a bin cover matched with the battery bin in specification is arranged on the front side of the battery bin, and the bin cover is connected with the bottom of the front wall of the machine shell through an elastic rope. Therefore, damage caused by collision and friction between four corners of the casing and foreign objects is avoided, influence on appearance integrity and service life of the casing can be avoided, in addition, the sealing effect on the battery compartment is good, dust or moisture is not easy to enter the battery compartment, and the service life of the casing is prolonged. Therefore, the performance and the service life of the battery are not affected by dust or moisture.

The invention discloses a quartz bell jar type framework for diamond growth equipment based on an MPCVD method. The quartz bell jar type framework comprises a lower cavity, a molybdenum disc assembly; a middle cavity; the bottom of the quartz tube is embedded in the annular mounting groove; a gas supply ring structure; and the microwave waveguide structure is arranged in the middle of the air supply pipeline in a sleeving manner. According to the technical scheme, flange connection is omitted, so that assembling procedures are reduced, and assembling is easier; according to the technical scheme, only two sealing faces are reserved, the sealing performance is good, and the vacuum degree is high; according to the technical scheme, the assembly surfaces are few, the microwave waveguide is more stable, and the plasma in the cavity is more stable; meanwhile, due to the fact that the number of assembly parts is small, cost is saved.

The application discloses a temperature control method and device of a semiconductor device, equipment and a storage medium, and relates to the technical field of temperature control, and comprises the following steps: based on the slit cavity observation band brightness of the edge infrared observation annular area of a rapid thermal processing furnace and the surface emissivity of a wafer, the equivalent radiation temperature of the slit cavity observation band brightness is calculated; the equivalent temperature of the inner edge of a quartz bell jar is solved; based on the equivalent radiation temperature and the equivalent temperature of the inner edge of the quartz bell jar, the net radiation incident heat power transmitted from the annular slit radiation cavity of the rapid thermal processing furnace to the wafer edge band of the wafer is calculated; and based on the net radiation incident heat power, the target lamp area power replacement vector of the rapid thermal processing furnace is solved. The application can improve the initiative and accuracy of wafer edge temperature control.

The utility model discloses a control circuit of a quartz clock LCD calendar strip, which comprises a calendar strip main control chip MCU, a pin 1 of the calendar strip main control chip MCU is electrically connected with one end of a capacitor C8 and one end of a resistor R3, the other end of the capacitor C8 is grounded, the other end of the resistor R3 is electrically connected with a pin 56 of the calendar strip main control chip MCU, and the other end of the resistor R3 is grounded. And a pin 55 and a pin 54 of the calendar bar main control chip MCU are electrically connected with one end of a resistor R16 and one end of a resistor R2 respectively. Through cooperation of the calendar bar main control chip MCU, the battery control circuit and the memory battery BATT1, time can be memorized, the time is well adjusted when a quartz clock is produced, the current time can be immediately and automatically displayed as long as the battery is installed, the time cannot return to zero, manual adjustment of a consumer is not needed, and the production efficiency is greatly improved. And adjustment time and adjustment troubles are saved for consumers.

The invention relates to the technical field of quartz clock assembling, and discloses a quartz clock movement front cover copper head assembling machine capable of accurately positioning and assembling, which is characterized in that an infrared laser is fixedly arranged on the outer wall of an electric clamping assembly; the multi-axis moving assembly comprises a first guide rod welded to the inner wall of the groove of the main body frame and a fixing block connected to the first guide rod in a sliding mode, and the multi-axis moving assembly further comprises a second guide rod welded to the upper portion of the fixing block and a workbench connected to the second guide rod in a sliding mode. Through the arrangement of the infrared laser instrument and the multi-axis moving assembly, the infrared laser instrument can display the clamping position of the electric clamping assembly on the workbench, at the moment, a front cover of another size is placed on the workbench, the workbench moves in the X-axis direction and the Z-axis direction, and therefore the front cover of the other size is placed on the workbench. Therefore, the front cover placed above the working table is aligned to the lower portion of the copper head clamped by the electric clamping assembly, and the accuracy during follow-up repeated installation of the copper head and the front cover is improved.

A quartz clock movement relates to the technical field of clock, through setting the escapement wheel and the escapement on the transmission gear, and setting the escapement bolt and the hairspring on the flywheel, the escapement wheel directly impacts the hairspring and the flywheel under the drive of the transmission gear, so as to save energy consumption and improve the accuracy of the quartz clock; the quartz clock movement has the advantages of high practicability, simple use, high energy saving of the quartz clock up to 5%, mutual control and adjustment combination of the escapement, the hairspring and the flywheel, fine adjustment during installation and adjustment, the accuracy of the quartz clock up to 3 seconds below for 3 months, and greatly improved accuracy of the quartz clock.

The invention discloses an electron beam welding device and a welding method thereof, and relates to the technical field of electron beam welding, the electron beam welding device comprises a bearing seat, a rotating shaft extending in the axial direction of the bearing seat is installed in the bearing seat, and the outer wall of the rotating shaft is connected with a rotor, a heat insulation disc, a separation sleeve and a switching disc from bottom to top; the quartz clock cover covers the rotating shaft, a sealing gasket is arranged on the top face of the bearing seat, the bottom of the quartz clock cover is embedded into the sealing gasket, a stator and a vacuum flow channel corresponding to the rotor are arranged on the quartz clock cover, the quartz clock cover at least comprises an air exhaust channel formed in the bottom face of the bearing seat, and a first air channel extending in the axial direction of the rotating shaft is formed in the rotating shaft. According to the bearing seat, heat transferred into the bearing seat of the electron beam welding device can be reduced, the temperature in the welding process can be properly reduced, the heat dissipation performance of the electron beam welding device is improved, and the overall service life of the electron beam welding device is prolonged.

The invention provides an epitaxial growth method and system, and the method comprises the steps: reducing the heating power of a reaction chamber before a silicon wafer completely enters the reaction chamber, so as to enable the temperature difference between a contact position and a non-contact position, which are used for being in contact with a supporting part, of the back surface of the silicon wafer in a loading process to be within a target temperature difference range; and / or, before the silicon wafer completely enters the reaction chamber, etching gas is conveyed into the reaction chamber so as to etch an upper quartz clock cover and / or a lower quartz clock cover of the reaction chamber, so that the cleaning treatment of the reaction chamber is realized; and loading the silicon wafer into the reaction chamber for epitaxial growth to obtain an epitaxial wafer. According to the method, the temperature inconsistency generated on the silicon wafer is effectively reduced, so that the temperature distribution tends to be uniform in the deposition process of the epitaxial layer, the generation of the Pin Nano defect of the epitaxial wafer is effectively inhibited, and the surface quality and the product yield of the epitaxial wafer are improved.

The utility model discloses a modularized synchronous quartz clock movement, which comprises a first module and a second module, the first module comprises a circuit board connected with a branch bracket coil component, a second bracket coil component and an optical sensing system, and the circuit board is provided with a standard port; the second module comprises a control chip used for controlling a synchronous movement, a driving chip used for driving a stepping motor, a synchronous module used for receiving a time source or other information such as weather forecast, a calendar, a lunar calendar and the like, a power supply and an integrated assembly of a management system of the power supply. The first module is provided with a standard port, the second module is provided with a fourth connecting port connected with the standard port of the first module, the first module is a complete module, and different synchronous movement groups such as an electric wave synchronous clock, a WIFI synchronous clock and a Bluetooth synchronous clock can be combined by replacing different second modules.

The utility model discloses a positive electrode sheet of a quartz clock movement and a positioning device thereof, wherein the positive electrode sheet comprises: a battery connection section, which is connected with a first protrusion, and the first protrusion is used to connect the positive terminal of the battery; a middle section, one end of which is connected to the battery connection section; the middle end of the middle section is provided with a second protrusion; a circuit board connection section, which contains a circuit board solder section, and the circuit board solder section is used to electrically connect the circuit board; the other end of the middle section is connected to the circuit board connection section. The utility model can realize that each positive electrode sheet is easy to separate during the working process in the vibration plate, and does not affect the subsequent automatic installation process of the positive electrode sheet to the movement box.

The utility model provides a second gear shaft anti-drop movement, the movement is provided with a housing and a travel time assembly, the travel time assembly comprises a second wheel, the second wheel is provided with a second gear shaft, the housing is provided with a positioning groove and a positioning hole of the second gear shaft, one end of the second gear shaft is rotatably assembled in the positioning groove, and the other end of the second gear shaft penetrates through the positioning hole. The second gear shaft is characterized in that the diameter of one end, assembled in the positioning groove, of the second gear shaft is larger than that of the other end of the second gear shaft; the inner diameter of the positioning groove is larger than the inner diameter of the minute hand positioning end or the hour hand positioning end. The diameter of one end, assembled in a positioning groove, of a second gear shaft is larger than that of the other end; the inner diameter of the positioning groove is larger than the diameter of the positioning hole, so that when the second gear and the second gear shaft are assembled, whether the second gear and the second gear shaft reach the correct position or not can be judged with higher efficiency, and on the other hand, the situation that the second gear shaft is pulled out of the quartz clock movement can be effectively avoided in the assembling process of a finished clock. The diameter of the large-diameter end of the second gear shaft is larger than the inner diameter of the second gear shaft hole, and the purpose of the second gear shaft is achieved through further optimization. The positioning groove is formed in the rear cover, that is, the diameter of the end part of the second gear shaft assembled on the rear cover is larger than that of other parts, so that the problem that the rear cover of the movement is easily poked in the assembling process due to the fact that the diameter of the second gear shaft of the traditional movement is too small can be effectively solved.

The application provides a crystal pulling method for improving the qualified rate of ultra-low resistance red phosphorus single crystal, and belongs to the technical field of ultra-low resistance crystal pulling methods. A CUSP magnetic field is turned on during doping and turned off after crystal pulling is completed. Meanwhile, the position of a hook-shaped magnetic field is controlled according to the position of a doped quartz bell jar. Then, during the constant-diameter process, the hook-shaped magnetic field is kept at a predetermined position below the silicon solution, and the magnetic field strength of the hook-shaped magnetic field is controlled. The argon flow, furnace pressure, crucible rotation speed, crystal rod rotation speed and crystal pulling speed are adjusted, so that the mass and heat transfer mechanism in the melt is changed from "uncontrollable strong convection" to "controllable weak convection / diffusion dominant" mode. The upward flow in the center region of the melt and the horizontal flow on the surface are weakened, the evaporation rate of phosphorus from the free liquid surface can be significantly reduced, a heavily doped red phosphorus crystal rod with Res less than or equal to 0.0001 ohm*cm can be pulled, the axial resistivity distribution of the pulled crystal rod is uniform, and the qualified rate of the crystal rod with Res less than or equal to 0.0001 ohm*cm is greater than or equal to 55%.