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82 results about "Mechanical watch" patented technology

A mechanical watch is a watch that uses a clockwork mechanism to measure the passage of time, as opposed to quartz watches which function electronically via a small battery. A mechanical watch is driven by a mainspring which must be wound either periodically by hand or via an automatic winding mechanism. Its force is transmitted through a series of gears to power the balance wheel, a weighted wheel which oscillates back and forth at a constant rate. A device called an escapement releases the watch's wheels to move forward a small amount with each swing of the balance wheel, moving the watch's hands forward at a constant rate. The escapement is what makes the 'ticking' sound which is heard in an operating mechanical watch. Mechanical watches evolved in Europe in the 17th century from spring powered clocks, which appeared in the 15th century.

Measuring system for plurality of mechanical timepiece movements

A measurement system for a plurality of mechanical timepiece movements is disclosed. The invention relates to a case (1) configured to accommodate a plurality of mechanical watch movements (10) in a chained state, each movement being housed in a compartment (5) configured to accommodate and hold the movement according to a predefined orientation. In the position, the upper chain button (8) of the movement is positioned to face a corresponding microphone (7) mounted inside the box body (1). The microphones are configured such that they cancel the detected noise such that the acoustic measurement of each movement (10) is essentially free from noise interference generated by the adjacent movement. The invention further relates to a method for testing a plurality of mechanical movements (10) mounted in a cartridge (1) and to a test system comprising such a cartridge. According to the method, the movement is measured by a plurality of cycles of consecutive and successive measurement periods.
Owner:THE SWATCH GRP RES & DEVELONMENT LTD

movement (equation)

1. Name of the designed product: movement (equation). 2. Use of the designed product: movement for mechanical watch. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.
Owner:GUANGZHOU SAI CLOCK WATCH CO LTD

Watch tooth dividing shaft

The utility model discloses a watch tooth dividing shaft, which relates to the technical field of mechanical watches and comprises a central shaft, a minute wheel shaft sleeve and an hour wheel shaft sleeve, the minute wheel shaft sleeve is movably sleeved outside the central shaft, the hour wheel shaft sleeve is movably sleeved outside the minute wheel shaft sleeve, outer teeth are arranged at the top end of the minute wheel shaft sleeve, and the hour wheel shaft sleeve is sleeved outside the hour wheel shaft sleeve. According to the utility model, the structure of the meter body is improved, so that the pointer is in interference fit in a manner that the external gear is nested in the internal gear, and the line contact at the present stage is changed into surface contact, thereby improving the firmness degree of pointer installation; the pointer is still accurate in indication under the conditions of long-time use and frequent vibration of the meter body, and meanwhile, the integrated lubrication is adopted, so that an operator can lubricate the central shaft, the minute gear shaft and the hour gear shaft under the condition that the central shaft, the minute gear shaft and the hour gear shaft are not disassembled, and the later maintenance of the meter body is facilitated.
Owner:QINGDAO ZHISHENGDA INSTRUMENT CO LTD

Mechanical watch movement

The utility model discloses a mechanical watch movement, relates to the technical field of mechanical watch movement, aims to solve the problem that a biaxial tourbillon movement is influenced by gravitational attraction when being placed on a movement plane, and comprises a middle clamping plate, a triple clamping plate, a lower clamping plate, a bottom clamping plate, a second upper support assembly and a transmission assembly, a second gear shaft is rotationally connected between the second upper supporting assembly and the bottom clamping plate, the top end of the second gear shaft is in interference connection with a second shaft support, a fixed planet wheel and a movable planet wheel are arranged on the second shaft support, and the movable planet wheel is in meshed connection with a rail wheel; the spherical frame is rotationally arranged between the fixed planet wheel and the movable planet wheel; a second clamping plate connecting piece is rotationally connected to the bottom of the interior of the spherical frame, a fixed second wheel sheet is fixedly connected to the interior of the spherical frame, and a swing clamping plate is fixedly connected to the second clamping plate connecting piece; and an escapement mechanism is also arranged.
Owner:孔雀表业(集团)有限公司

A semi-solid aluminum alloy die-casting composite feeding device

The application discloses a kind of semi-solid aluminum alloy die-casting composite feeding device, it is related to the field of die-casting machine feeding device, including feeding device, injection chamber and push rod, the injection chamber outside is equipped with fixed shell, and fixed shell inner wall is equipped with storage cavity.The application can continuously stir semi-solid molten metal throughout the process by the cooperation of storage cavity and rotatable lifting stirring blade structure, effectively suppresses the stratification and specific gravity segregation problem of metal raw materials due to the difference in component proportion, keeps the internal composition of molten metal uniform and consistent at all times, avoids the drawbacks of traditional mechanical watch layer material taking, stabilizes the internal structure of casting, significantly improves the overall forming quality of product, the temperature control of heat supplement pipe and heat preservation layer outside storage cavity, the heat insulation shell outside feeding pipe and the high-temperature steam waste heat reuse structure of storage cavity are matched, realize the closed conveying of molten metal and whole process heat preservation, substantially reduce the heat loss in the process of material conveying and storage, reduce the heat supplement energy consumption.
Owner:YINGTAN HOPE METAL CO LTD

Tourbillon structure of mechanical watch with counterweight compensation

The invention discloses a tourbillon structure of a mechanical watch with counterweight compensation, and relates to the technical field of mechanical watch application, the tourbillon structure comprises a frame plate, a first direction shaft, an outer tourbillon, a second direction shaft, an inner tourbillon, an escapement mechanism and a transmission system, the outer tourbillon is rotatably connected with the frame plate through the first direction shaft, and the outer tourbillon is rotatably connected with the frame plate through the second direction shaft; the outer tourbillon is rotatably connected with the inner tourbillon through a first direction shaft, the axis of the outer tourbillon is perpendicular to the first direction shaft, the inner tourbillon is rotatably connected with the outer tourbillon through a second direction shaft, the escapement mechanism is arranged on the inner tourbillon, and the escapement mechanism comprises an escapement wheel, an escapement fork and a hairspring balance wheel. And in combination with an inertia fine adjustment mechanism on the balance wheel, collaborative optimization is performed from two levels of frame dynamic balance and speed regulation period, so that the problem of uneven mass distribution easily caused by a complex structure of the double-shaft tourbillon is effectively solved, and frictional resistance and unnecessary energy loss of the rotating frame are remarkably reduced.
Owner:SHENZHEN FUMARO TECHNOLOGY CO LTD

Kinetic energy recovery device for an automatic winding movement

ActiveCN117492347BAutomatic windingRobot handMainspring
The application relates to the technical field of mechanical watches, and discloses a kinetic energy recovery device of an automatic winding movement, which comprises a watch dial, a watchband, the watchband is symmetrically connected at the two sides of the watch dial in a rotating mode, a winding rotating column is connected to the watch dial in a rotating mode, an energy storage assembly for winding the watch dial and storing energy is arranged at the bottom of the watch dial, wherein the energy storage assembly comprises a protection disc, the protection disc is fixedly installed at the bottom of the watch dial, a main shaft is connected to the inner wall of the protection disc in a rotating mode, and the top end of the main shaft is fixedly connected with an energy storage torsional spring; the winding rotating column is rotated through a rotating rod and an energy releasing belt, the winding kinetic energy of the watch dial is avoided, the movement cannot provide sufficient energy to the mainspring, the stable operation of the movement is affected, the running time of the watch is obviously deviated or the shaking phenomenon appears, the watch dial has sufficient energy storage, the time display accuracy of the watch dial is maintained, the operation and energy input of manual winding of a wearer are saved, and the watch does not need to be manually wound every day.
Owner:JUNSON SHENZHEN CHUANJINDAIYIN TECH CO LTD

winding indicator ring (3)

ActiveCN310169425SRobot handMechanical watch
1. The name of the design product: watch winder decoration ring (3). 2. The use of the design product: used for decorating mechanical watch automatic chain device. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective drawing.
Owner:GUANGDONG SIMI INTELLIGENT TECH CO LTD

Mechanical watch movement with shock absorbing barrel structure

ActiveCN224417178UCoil springMechanical watch
The utility model discloses a mechanical watch movement with shock absorption watch barrel structure, including movement, the outer wall of movement is installed with watch barrel structure, the watch barrel structure includes the body and outer thread connecting ring, the outer thread connecting ring is fixed in the upper end outer surface of body, the side of body is provided with the watch crown shaft through -hole. The utility model discloses a mechanical watch movement with shock absorption watch barrel structure is provided with the shock absorption structure, and the shock absorption structure is installed on the outer wall of watch barrel structure, and the shock absorption between watch barrel structure and watch case is improved, and the protective property is improved, and the inside installation spiral spring of annular rubber in shock absorption structure, after the connection of outside watch case and outer thread connecting ring, spiral spring is always in the state of being extruded, and the loosening between outside shell and outer thread connecting ring after the thread connection is eliminated by the reaction force of spiral spring, provides the sustained pretightening force, improves the stability after installation.
Owner:衡阳市胤贝钟表有限公司

Electronic intelligent dredger

The invention relates to the technical field of dredgers, and particularly discloses an electronic intelligent dredger which comprises a dredger shell, a gas storage tank structure is connected to the dredger shell and used for storing gas, the pressure value of the gas is fed back to a gas pressure sensor, and the sensed pressure is controlled to stop through a mainboard. Gas is emitted through a manual switch to dredge blocked foreign matters; according to the electronic intelligent dredger, a user can select a corresponding working mode according to a use scene, in the corresponding working mode, a system automatically sets preset pressure, in the inflation process of the inflation assembly, the air pressure sensor feeds back the current air pressure in real time, and inflation is automatically stopped when the preset air pressure is reached, so that one-button intelligent operation is realized; and the user can set the preset air pressure by himself according to a special use scene, can be used in various use scenes, and does not need to observe the pointer reading of the mechanical watch according to experience, manually control the air pressure or cannot monitor the air pressure in real time compared with similar products.
Owner:GUANGDONG YUTING XIANFA TECH CO LTD

winding indicator (1)

Owner:FOSHAN HUAXUPAI HOME TECHNOLOGY CO LTD

Mechanical watch with embedded watch bezel

The utility model discloses a mechanical watch with an embedded watch bezel, comprising a watch middle shell and a watch bezel, the watch bezel is installed on the watch middle shell, the outer ring surface of the watch middle shell is recessed to form an annular groove, the inner ring surface of the annular groove is provided with a plurality of positioning grooves, and the outer ring surface of the watch bezel is provided with assembling ports facing the positioning grooves. Decorative blocks are inserted into the assembling openings correspondingly, positioning blocks are installed at one ends of the decorative blocks correspondingly, the positioning blocks are slidably arranged in the positioning grooves correspondingly, and positioning rings and limiting rings are arranged in the annular grooves. The watch bezel is simple in structure, the appearance of the watch bezel can be changed by replacing the decoration block and placing the decoration in the decoration block, adaptability is improved, the watch bezel can be directly detached in a rotating mode after the decoration block is moved out, and operation is convenient.
Owner:SHENZHEN ZHONGSHI WATCH CO LTD

Gear transmission mechanism movement of tourbillon chronograph

The utility model discloses a movement of a gear transmission mechanism of a tourbillon stopwatch, relates to the technical field of movement transmission mechanisms of mechanical watches, and aims to solve the problems that the movement of the tourbillon stopwatch is large in gear transmission difficulty and large in energy loss. The barrel wheel component is connected with a center wheel component in a meshed mode, the center wheel component is connected with a third wheel component in a meshed mode, the second transmission component comprises a second transmission gear shaft, a second transmission piece and a second transmission wheel, the second transmission gear shaft is connected with the third wheel component in a meshed mode, and the second transmission piece is connected with the second transmission wheel in a meshed mode. The second transmission piece is in meshed connection with a second idle gear part, the second idle gear part is in meshed connection with a second setting gear part, and the second setting gear part is connected with a tourbillon mechanism. And the second transmission wheel is in meshed connection with a second metering idle gear assembly.
Owner:孔雀表业(集团)有限公司

Transmission structure of mechanical watch

The utility model discloses a transmission structure of a mechanical watch, which comprises a dial plate, an hour hand wheel disc, a minute hand wheel disc, a tourbillon and a rotating disc, the dial plate is provided with a hollow cavity, and the hour hand wheel disc, the minute hand wheel disc, the tourbillon and the rotating disc are all arranged in the hollow cavity; the tourbillon comprises a second hand bracket, a hairspring, a flywheel, an escapement fork, an escapement wheel, a driving gear and a base; the second hand support is installed on the base, and the flywheel, the escapement fork, the escapement wheel and the driving gear are all arranged between the second hand support and the base. The base is provided with a middle shaft rod, the hairspring, the flywheel and the escapement wheel are all connected to the middle shaft rod in a penetrating mode, and the escapement wheel is vertically arranged so that the transverse space occupied by the tourbillon can be reduced; the wall part of the hollow cavity is provided with first rotation guiding teeth, and the minute hand wheel disc rotating along the first rotation guiding teeth drives the hour hand wheel disc to rotate together through the rotating disc. The device has the advantages of simple structure, compact matching, reasonable design and the like; therefore, the device is a product with excellent technical and economical performance.
Owner:丁宝宁

Mechanical watch movement escapement wheel drilling device

The application discloses a mechanical watch core escapement wheel drilling device, which comprises a support frame, a sliding block is slidably connected to the top end of the support frame, a slow driving device is slidably connected to the top end of the sliding block, a detection and cleaning mechanism is arranged on the left side of the driving device, a fixing mechanism is arranged on the left side of the detection and cleaning mechanism, and a driving equipment is arranged on the left side of the fixing mechanism. The detection and cleaning mechanism comprises a drill bit, an L-threaded rod is arranged at the lower left side of the middle part of the drill bit, a threaded sleeve is threadedly connected to the top end of the L-threaded rod, a semicircular detection ring is fixedly connected to the top end of the threaded sleeve, an arc-shaped baffle passes through the middle part of the side, away from the drill bit, of the semicircular detection ring, a connecting spring is fixedly connected to the side, away from the drill bit, of the arc-shaped baffle, and a wobble ball is fixedly connected to the bottom end of the middle part of the connecting spring. The application relates to the technical field of clocks, has the characteristics of high practicability, can detect whether the drill bit is off-axis before drilling the escapement wheel, and improves the drilling efficiency of the escapement wheel.
Owner:武汉晨龙电子有限公司

Escapement fork and escapement assembly of mechanical watch

The utility model relates to the technical field of mechanical watches, and discloses an escapement fork and escapement assembly of a mechanical watch, which comprises an escapement fork main body, an escapement wheel and a disc, the two ends of the escapement fork main body are both in threaded connection with clamping assemblies, one side of the escapement fork main body is fixedly connected with a fork body, the two sides of the fork body are both fixedly connected with positioning bolts, and the positioning bolts are fixedly connected with the disc. A supporting sleeve is rotatably connected to the surface of the positioning bolt, a sliding rod is slidably connected to the interior of the supporting sleeve, two buffer assemblies are fixedly connected to one end of the sliding rod, a connecting bolt is rotatably connected to one end of the sliding rod, and the clamping assembly comprises threaded bolts in threaded connection to the two ends of the escapement fork body. Through the arrangement of the clamping assembly and the escapement fork body, the effect of adapting to incoming tiles and outgoing tiles of different sizes is achieved, the operation stability is improved, replacement and disassembly are convenient, and the convenience and applicability of the escapement fork and the escapement assembly of the mechanical watch are improved.
Owner:SHENZHEN RUIHUI BELL & WATCH

Ventilation detection device for mine

PendingCN121995015ASlowly release potential energychange squeezing forceSpring motorWithdrawing sample devicesStructural engineeringProcess engineering
The invention belongs to the technical field of ventilation detection, and particularly discloses a ventilation detection device for a mine, which comprises a slow release mechanism, an automatic energy storage mechanism and a gas sampling mechanism, the slow release mechanism comprises a bottom shell, an alternate stopping assembly and a resistance adjusting assembly, the resistance adjusting assembly is arranged in the bottom shell, and the automatic energy storage mechanism is arranged in the bottom shell. The alternate stopping assembly is arranged in the resistance adjusting assembly in a sliding mode, the automatic energy storage mechanism is arranged on the bottom shell, and the gas sampling mechanism is arranged on the automatic energy storage mechanism. In order to overcome the technical contradiction that the friction force cannot be too large or too small, the invention creatively provides a slow-release mechanism from an escapement mechanism of a mechanical watch, slow rotation of a central screw can be realized through alternate pushing of two groups of turntables to two sliding rods, and then slow release of the elastic force of a coil spring is realized. Therefore, the technical target of prolonging the gas sampling time period is achieved.
Owner:INNER MONGOLIA BEILIANDIAN GAOTOUYAO MINING INDUSTRY CO LTD

Method and system for assisting the regulation of a mechanical timepiece

The invention relates to a method for assisting the adjustment of a mechanism of a mechanical watch (10) used by a computer terminal. The method comprises the following steps: i) capturing an image or a sequence of images of the mechanical watch (10) by means of a computer device (20) comprising an image capture device (22) and a display area (24); ii) determining the adjustment to be made from the image or the sequence of images, and iii) displaying a sequence of instructions for the adjustment of the mechanism on the display area (24) of the computer device (20).
Owner:PATEK PHILIPPE SA

Mechanical watch escapement heat treatment process

The application discloses a mechanical watch escapement wheel heat treatment processing technology, comprising the following steps: step one, cleaning; step two, preheating; step three, heating; step four, processing; step five, quenching; step six, tempering; step seven, air cooling; step eight, deep cooling; step nine, detection; wherein in the above step one, the semi-finished escapement wheel made of 42CrMo material is placed in an ultrasonic cleaning device, the surface residual impurities of the semi-finished escapement wheel are removed by using the ultrasonic principle, and after the removal is completed, the semi-finished escapement wheel is taken out, then the semi-finished escapement wheel is evenly placed in a draining tray, and the draining tray with the semi-finished escapement wheel is placed in a dry drying room for draining and drying treatment; the application eliminates the stress generated by the escapement wheel by deep cooling treatment before finishing, thereby improving the quality of the escapement wheel and prolonging the service life of the escapement wheel.
Owner:EBOHR LUXURIES INT CO LTD

Spring motor device

A spring-driven device, particularly suitable for making mechanical watches, comprises: a circular gear wheel 3 installed inside the barrel and directly meshed with the internal circular ring gear 2 of the drum 1, to roll with a constant transmission ratio around a central axis orthogonal to a plane of rotation of the circular gear wheel 3 and substantially parallel to the central axis of the barrel, so that the second central axis B rotates around the axis of the barrel with a fixed eccentricity greater than zero; a shaft 4 constrained to the circular gear wheel 3, longitudinally directed along the central axis of rotation of the circular gear wheel 3; at least one rotatable rigid body 4 configured to rotate about the central axis of the barrel and connected to the circular gear wheel 3 so as to maintain it permanently in contact against the internal circular ring gear 2 and to be driven into rotation when the circular gear wheel 3 rolls in the internal circular ring gear 2; a spring 6 having a first end 7 connected to the drum 1 and a second end 8, opposite to the first, fixed directly to the tube 5 of the circular gear wheel 3 so as to rotate eccentrically around the central axis of the drum 1, so that the spring 6 is loaded or unloaded when the toothed wheel is rolled relative to the barrel, depending on the direction of rotation. A mechanical spring-driven watch is also disclosed.
Owner:LA VALLEE SRL +1

Storage box (123)

1. The name of the design product: safe (123). 2. The use of the design product: the design product is used for the drawer type password safe for storing valuable items and mechanical watches. 3. The design points of the design product: the overall shape design of the design product. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design. 6. Other circumstances that need to be explained: A is a fingerprint, password unlocking touch panel.
Owner:FOSHAN HUAXUPAI HOME TECHNOLOGY CO LTD

Upper and lower parallel double-spring movement of mechanical watch

ActiveCN223664913UVisual indicationHorological winding mechanismsDrive wheelMainspring
The utility model relates to the technical field of mechanical watches, and discloses an up-down parallel double-spring movement of a mechanical watch, which comprises a vertical wheel, one side of the vertical wheel is meshed with an adjusting wheel in a rotating manner, one side of the adjusting wheel is meshed with two groups of energy display mechanisms in a connecting manner, and one side of the adjusting wheel is meshed with a driving wheel in a rotating manner. According to the up-down parallel double-spring movement of the mechanical watch, through the arrangement of the watch crown, the adjusting wheel, the display mechanism and the display mechanism, when two spring boxes are tightened, the watch crown is manually rotated, the vertical wheel rotates to drive the adjusting wheel to rotate, the display wheel rotates while the adjusting wheel tightens the two spring boxes, and the display wheel drives the display ring to rotate; the energy scales on the energy display ring can visually display the residual power of the two spring boxes, so that the independent power storage display device is added, a user can conveniently check the residual power of each spring box, the power output of the movement is more accurate, and inaccurate travel time caused by imbalance of a certain spring box is avoided.
Owner:SHENZHEN RUIHUI BELL & WATCH

Watch accessory replacement structure

The utility model relates to the technical field of mechanical watches, and discloses a watch accessory replacement structure, which comprises a watchcase and a group of connecting blocks arranged on the outer surface of the watchcase, and the bottom of the watchcase is provided with a group of ventilation blocks arranged circumferentially. According to the watch accessory replacement structure, through the combination design of the circumferentially arranged ventilation blocks at the bottom of the watch shell and the isosceles trapezoid ventilation grooves, an air convection channel is formed, the air circulation efficiency at the bottom of the watch body is effectively enhanced, and the distributed rubber convex ball structures on the contact disc are matched to maintain an air flow channel; the problem of stuffiness and sweat accumulation caused by tight contact between a bottom cover of a traditional mechanical watch and the skin is solved, the torsion spring and the connecting frame are arranged so that the connecting frame can adjust the wrapping angle according to the shape of the carpal bone, the bottom end of the connecting frame is pressed to turn over during wearing, and self-adaptive attachment of the watchband to the curve of the carpal bone is achieved through the reset force of the torsion spring; the problem of gap deviation of a traditional fixed connection structure is solved, and wearing discomfort caused by excessive constraint is avoided.
Owner:深圳市诚敬表业有限公司

Winding watch ornament ring (1)

ActiveCN310169427SRobot handMechanical watch
1. The name of the design product: watch winder decoration ring (1). 2. The use of the design product: used for decorating mechanical watch automatic chain device. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective drawing.
Owner:GUANGDONG SIMI INTELLIGENT TECH CO LTD

A mechanical watch time adjustment device

The application discloses a mechanical watch running time adjusting device, which comprises a dial pin arranged on a balance wheel shaft and movably connected with the balance wheel shaft, and a hairspring movably connected with the dial pin; a fine adjustment device arranged on a balance wheel plate, the dial pin extends into the fine adjustment device, and both sides of the dial pin are connected with the fine adjustment device. In the application, the fine adjustment device is clamped on both sides of the dial pin, and only the fine adjustment device needs to be adjusted during adjustment. During adjustment, the position of the pointer can be adjusted by rotating a threaded rod, and the pointer is tightly attached to the pointer under the action of an elastic part, so that the pointer is prevented from being excessively adjusted, and the fine adjustment of fast and slow pointers is realized. Meanwhile, the pointer is prevented from jumping due to vibration under the clamping of the elastic part, and the running time of the watch is prevented from being affected.
Owner:GUANGZHOU ONE SECOND WATCH CO LTD

Mechanical watch (marine wheel GJ16481)

1. Name of the designed product: mechanical watch (navigation wheel GJ16481). 2. Use of the designed product: the designed product is used for displaying time. 3. Design points of the designed product: combination of shape and pattern. 4. Picture or photo best indicating the design points: perspective view.
Owner:GUANGZHOU JUWANTENG TECHNOLOGY CO LTD

A high-precision polishing device for a mechanical watch dial

The present application relates to the technical field of equipment polishing, in particular to a high-precision polishing device for mechanical watch dial, comprising a polishing power box, a multi-aperture polishing mechanism and a dial transposition bearing mechanism are installed on the polishing power box, the dial transposition bearing mechanism is located on one side of the multi-aperture polishing mechanism, the multi-aperture polishing mechanism comprises a polishing drive assembly and a multi-aperture transposition assembly, the polishing drive assembly is arranged on the polishing power box, the multi-aperture transposition assembly is arranged on the polishing drive assembly, a plurality of polishing cloths with different apertures are arranged on the multi-aperture transposition assembly, which are used for high-precision polishing operation of the surface of the mechanical watch dial with different apertures, in the process of polishing the mechanical watch dial, the present application can not only replace manual work to polish most areas of the mechanical watch dial with different apertures, but also can detect the polishing pressure to prevent the damage of the mechanical watch dial during the polishing process, so that the applicability is stronger.
Owner:HUNAN AIER CLOCK & WATCH CO LTD