236results about How to "Improve the vibration effect" patented technology

The invention relates to a key structure and an input device. The key structure comprises a key cap layer, a circuit layer, a touch generator, a support structure layer and an adhesion layer, wherein the key cap layer comprises a key cap region and a peripheral region; the peripheral region is adjacent to the key cap region; the circuit layer is arranged below the key cap layer; the touch generator is electrically connected with the circuit layer; the support structure layer is arranged below the circuit layer, and comprises an accommodating space; the touch generator is located in the accommodating space; and the adhesive layer is arranged between the key cap layer and the circuit layer and corresponds to the peripheral region. According to the key structure and the input device provided by the invention, the adhesive layer is only arranged on the part (namely the peripheral region) outside the key cap region, so that the kinetic energy loss when the touch generator vibrates can be effectively reduced. Furthermore, according to the key structure and the input device provided by the invention, the vibration effect can be strengthened, the appearance design can be reinforced, the operation convenience can be improved or the cost can be reduced through the key cap layer with different structure designs and different material choices.

The invention provides a sounder which comprises a vibration system, a magnetic circuit system and a housing accommodating the vibration system and the magnetic circuit system, wherein, the magnetic circuit system comprises a magnetic frame having accommodation space and fixed on the housing and a permanent magnet assembly accommodated in the accommodation space, a magnetic gap is provided between the magnetic frame and the permanent magnet assembly, the vibration system comprises a first diaphragm and a second diaphragm which are attached to the housing and separate from each other to form a certain distance, a voice coil framework with one end connected with the first diaphragm and the other end connected with the second diaphragm, and a first voice coil and a second voice coil wound on the voice coil framework, the voice coil framework is located in the magnetic gap, and the magnetic circuit system is located between the first diaphragm and the second diaphragm. The sounder provided in the invention enables voice effects of a product to be enhanced.

The invention relates to a high-viscous emulsified asphalt for CA mortar and a preparation method thereof, belonging to the field of preparation technology of the CA mortar used for a high speed railway plate-type ballastless track. The high-viscous emulsified asphalt comprises the components by weight percent: 45-65% of asphalt, 2-4% of SBS, 2-8% of SBR, 0.3-1.5% of cation-type emulsifier, 0.2-1.2% of non-ionic emulsifier, 0.5-2% of stabilizing agent, 1-4.5% of additive and the rest of water, wherein modifier includes the SBS and the SBR, and emulsifier contains the cation-type emulsifier andthe non-ionic emulsifier; and the sum of the weight percent of the components is 100%. The invention has reasonable compound design, and can effectively improve the capabilities of high and low temperature resistance of asphalt emulsified liquid.

The invention discloses a heat-resistant corrosion-resistant rubber tube, and relates to the technical field of manufacturing of the rubber tube. The heat-resistant corrosion-resistant rubber tube comprises a rubber tube body, wherein the rubber tub body comprises an inner rubber layer, a cord fabric layer, a middle rubber layer, a coppered steel wire woven layer and an outer rubber layer which are arranged from inside to outside in sequence; the inner rubber layer is a fluorine rubber layer; the middle rubber layer and the outer rubber layer are both butadiene styrene rubber layers; the inner rubber layer, the cord fabric layer, the middle rubber layer and the coppered steel wire woven layer and the outer rubber layer are connected in a vulcanized manner. Compared with the prior art, the heat-resistant corrosion-resistant rubber tube has the advantages that the heat resistance and the corrosion resistance are greatly improved and the requirement on delivery of high-temperature gas or liquid with certain corrosiveness is met.

The invention relates to an array type touch panel with touch feedbacks, which comprises a touch unit, a central processing unit, a vibration unit and a display unit, wherein the vibration unit is provided with a plurality of thinned vibrators; when the display unit displays a touch picture and a touch body is positioned on the touch unit for touch control, an action track during touching is recorded by the touch unit and transmitted to the central processing unit; and then the vibration unit receives the action track to drive the vibrators at relative positions of the action track, thus the effects of generating local touch feedbacks by the touch points of the touch body and sequentially generating touch feedbacks according to the action track of the touch body during touching.

The invention discloses a medical constant-temperature gas-bath oscillation device. A chain wheel is fixedly connected with the top of a driving shaft; the chain wheel is engaged with the right end ofa chain; a left end chain wheel is engaged with the right end of the chain; the left end chain wheel is fixedly connected with a rotary shaft; the lower end of the rotary shaft is fixedly connected with a gear; the gear is engaged and connected with an annular tooth groove; a retainer sleeves the upper part of the rotary shaft; a driven shaft sleeves the middle part of the retainer; the top of the retainer is fixedly connected with a bottom plate; a semi-conical gear is fixedly connected with the top of the rotary shaft; the semi-conical gear is engaged with a conical gear; and the conical gear is fixedly connected with the driven shaft. According to the device disclosed by the invention, the annular tooth groove is matched with the gear to drive the bottom plate and a top plate to do eccentric rotation around the center of the driving shaft and automatically rotate to carry out transverse shaking on objects in an object storage groove; and the driven shaft is driven under the actionof the semi-conical gear and the conical gear, so as to drive a bidirectional screw rod to do forward and backward rotation in a reciprocating manner and longitudinally shake the objects in the objectstorage groove. The device disclosed by the invention is reasonable and applicable in structure design and the effect of shaking the objects is greatly improved.

The invention discloses a coupler synchronous type double-horizontal shaft vibration stirring machine, which comprises a machine frame and a vibration stirring device installed on the machine frame. Stirring drive and transmission devices are arranged at the left end of the vibration stirring device. Vibration drive and transmission devices are arranged at the right end of the vibration stirring device. The stirring drive and transmission devices and the vibration drive and transmission devices are installed on the machine frame. The vibration stirring device comprises a stirring cylinder and two stirring mechanisms. Both the two stirring mechanisms comprise hollow stirring shafts and a plurality of stirring units. The two stirring drive and transmission devices are respectively installed at the left ends of the two hollow stirring shafts. Synchronous couplers are installed between the two stirring drive and transmission devices. The two vibration drive and transmission devices are respectively installed at the right ends of the two hollow stirring shafts and respectively and fixedly connected with two vibration shafts. The coupler synchronous type double-horizontal shaft vibration stirring machine disclosed by the invention is simple and rational in structure and convenient for use; and mixed materials can be uniform in macroscopic and microscopic manners during a short time, thus, the stirring quality and the stirring efficiency are increased.

The invention discloses a hydraulic oscillator. The hydraulic oscillator comprises a vibration short section and a dynamic short section connected with the vibration section; the vibration short section comprises a slide shaft, a slide sleeve, a vibration spring, a piston terminal and a vibration shell; the upper end of the slide shaft is connected to a drill rod, and the slide shaft and the slide sleeve are in slide connection in the axial direction of a spline through the spline; the slide sleeve is connected with the vibration shell; a vibration spring is installed between the lower end of the slide sleeve and the vibration shell; the lower end of the slide shaft is provided with the piston terminal; the dynamic short section comprises a connection sleeve, a mandrel, a rotation shell, turbine blades, a fixed valve and an eccentric movable valve; the lower end of the connecting sleeve and the upper end of the rotation shell form one-way rotation connection in the axial directions of the lower end of the connecting sleeve and the upper end of the rotation shell; the upper end of the mandrel is connected with the connecting sleeve, and the lower end of the mandrel is arranged in the rotation shell; the inner wall is provided with the turbine blades and the eccentric movable valve in sequence from top to bottom; the mandrel is provided with the fixed valve. The hydraulic oscillator has the advantages that vibration and superposition effects can be compounded, and thus the friction force in the drilling process is drastically reduced.

The invention discloses a self-cleaning dust remover, which comprises a box body, an air inlet is formed in the side wall of the box body in a penetrating mode. The inner bottom of the box body is rotationally connected with a transmission shaft; a plurality of rotating blades are fixed to the circumferential side wall of the upper portion of the transmission shaft, an upper sealing ring in sealedsliding connection with the top in the box body is fixed to the ends, away from the transmission shaft, of the rotating blades, a filter screen is fixed to the bottom of the upper sealing ring, and alower sealing ring in sealed sliding connection with the bottom in the box body is fixed to the bottom of the filter screen. The method has the advantages that an air control plate is provided with asingle-side arc surface; the flow rates of the two sides of the air control plate are different when airflow flows through the air control plate; the air pressure difference is generated between thetwo sides of the air control plate, the filter screen vibrates under the impact of the push block, dust on the filter screen is separated from the filter screen through the impact of the push block onthe filter screen, self-cleaning of the filter screen is achieved, and the filter screen keeps a good filtering effect in the long-time use process.

The invention relates to the field of medical treatment and particularly discloses childcare tool cleaning and disinfection equipment. The equipment comprises a shell, an upper cover, a net box, a disinfectant box and a water spray pipe. The upper cover is arranged at the top of the shell. The disinfectant box is fixed to the outer surface of the upper cover. The bottom of the disinfectant box communicates with the water spray pipe located in the shell. Lifting supports capable of rising and falling are arranged in the shell. The net box moving up and down in the vertical direction is mountedbetween the lifting supports. Through up-down moving of the net box, care tools inside the net box are shaken, and impurities and the like sticking to the care tools are shaken off. According to the childcare tool cleaning and disinfection equipment, the height of the net box is adjusted by arranging the lifting supports with the adjustable heights, the shaking amplitude of the net box can be adjusted conveniently, shaking of different degrees is performed according to different care tools, the care tools are better protected, and the service lives of the tools are prolonged; and under drivingof a motor, cams with different lengths can be utilized for pushing the net box to shake, shaking is more continuous, and the vibrating effect is improved.

The invention provides a polymer melt shear vibration extrusion molding device which comprises an extruding machine 13, an extrusion head 1 connected with the extruding machine through a flange plate, a mouth mould 12, a stock mould 14, a cooling water tank 15, a traction device 16 and a cutting device 17, and is characterized by further comprising a crank connecting rod shear vibration system 18 and a melt runner vibration chamber 2, wherein the crank connecting rod shear vibration system 18 is arranged above the extrusion head 1; the melt runner vibration chamber 2 is arranged inside the extrusion head 1; the crank connecting rod shear vibration system is composed of a crank connecting rod mechanism and a reciprocating vibration rod 3; the reciprocating vibration rod 3 is positioned in a through hole 9 formed in the extrusion head 1; the through hole 9 is communicated with the melt runner vibration chamber 2. The device provided by the invention not only can simultaneously promote polymer molecule chain orientation, shish-kebab structure generation and polymer crystalline grain refinement, and improve mechanical property of products, but also can reduce extrusion resistance and improve production efficiency.

The invention relates to the technical field of screening machines, in particular to a working method of a building gravel screening device. The working method of the building gravel screening devicecomprises a work tank; a feeding device is arranged in the middle of the upper end of the work tank; a slide rail and the screening device are symmetrically arranged between the middles of a first partition plate and a second partition plate; U-type frames are symmetrically arranged on the front and rear sides of the outer wall of the screening device; vertical grooves matched with the screening device are symmetrically formed in the first partition plate and the second partition plate; a collection frame is arranged on the right side of the lower portion of the vertical groove in the second partition plate; the side, away from the screening device, of a rotary rod is rotationally connected with a power device through a pin shaft; and a discharging outlet is formed in the middle of the lower end of the work tank. The structural design is reasonable, use is convenient and rapid, gravels can be graded more finely while the gravel screening efficiency is improved, dust generating by screening the gravels can also be adsorbed, and high functionality and practicability are achieved.

The invention provides a loudspeaker. The loudspeaker comprises a basin frame, a vibration system and an elastic supporting piece. The vibration system comprises a first vibrating diaphragm and a voice coil. The elastic support member comprises a flexible circuit board which is fixed on the basin frame and supports the voice coil. the flexible circuit board comprises a first fixing part connectedwith the voice coil, a second fixing part connected with the basin frame and an elastic arm connected with the first fixing part and the second fixing part; the elastic arm comprises a first part connected with the first fixing part, a second part connected with the second fixing part and a third part connected with the first part and the second part in a bent mode. The third part is closer to thefirst vibrating diaphragm than the first part and the second part; and the tail end of the first part and the tail end of the second part are respectively bent and extend towards the direction closeto the first vibrating diaphragm and are connected to the two ends of the third part. The loudspeaker provided by the invention is simple in structure, high in vibration performance and good in acoustic performance.

The invention discloses an ultrasonic wave vibration equal channel angular extrusion combined mold. An ultrasonic wave vibration system is fixed on a mold base in the vertical direction; an L-shaped concave mold hole is formed in the output end of the ultrasonic wave vibration system; the feeding direction of the concave mold hole is parallel to the ultrasonic wave vibration direction; the discharge direction of the concave mold hole is perpendicular to the ultrasonic wave vibration direction; guide columns are uniformly arranged on the mold base; guide sleeves which relatively move in match with the guide columns are arranged on the guide columns; the guide sleeves are fixed on a top base of the mold; a convex mold is also fixed on the top base of the mold; a plurality of material guide sleeve support rods are uniformly fixed on the mold base; material guide sleeve fixing plates are fixed on the tops of the material guide sleeve support rods; material guide sleeves in match with the convex mold are fixed on the material guide fixing plates; the material guide sleeves are positioned above the convex mold hole; gaps are formed between the material guide sleeves and the concave mold hole. The ultrasonic wave vibration system and an equal channel angular extrusion mold are reasonably combined to form the ultrasonic wave vibration equal channel angular extrusion combined mold, so that both the yield stress and the flowing stress of a material are reduced, and crystal grains of the material are refined, and the comprehensive mechanical property of the material is improved.

The invention discloses a multi-frequency vibrator for concrete. The multi-frequency vibrator comprises a vibrator shell, wherein a plurality of groups of bidirectional vibration electromagnets with different vibration frequencies are arranged in the vibrator shell; each group of bidirectional vibration electromagnets comprise two bidirectional vibration electromagnets, of which two ends are vertical to the wall of the vibrator shell, and the two bidirectional vibration electromagnets in each group are vertical to each other on different horizontal planes; and the bidirectional vibration electromagnets are all connected with a power supply through a control circuit for generating different pulse signals. According to the invention, the vibrator can continuously work under a single frequency according to a mode of high frequency, middle frequency or low frequency or work under a mixed frequency according to a mode of mixing various frequencies, and the frequency of the vibrator can be changed in a certain range, so that the work frequency of each bidirectional vibration electromagnet is close to or the same as the self-vibration frequency of a concrete aggregate; and the vibrator can generate vibration forces with different vibration frequency combinations and different degrees in different directions so as to enhance the vibration effect and improve the concrete compactness.

The invention relates to a resin adhesive vacuum encapsulation device and a process thereof, which belong to the resin adhesive vacuum encapsulation technical field. The encapsulation device comprises a vacuum drying box, a vacuum pump, a sealing tube, a circuit tube, an overflow adhesive cup, connecting pipelines and valves and the like, which wholly form a complete set of differential-pressure vacuum encapsulation system with encapsulating adhesive automatic flowing for vacuum pumping and atmospheric pressure pushing. The differential-pressure encapsulation device has reasonable design and simple and practical structure, and is worth applying and promoting. The encapsulation process includes the following steps of preparing vacuum encapsulation adhesive, assembling the encapsulation device, operating a valve system of the device for a vacuum-pumping process, encapsulating a circuit, and finishing the encapsulation process. The encapsulation process is adopted to form a differential-pressure encapsulation circuit process with automatic flowing of resin adhesive, the encapsulation device is adopted, the resin adhesive is improved, and the whole structure of the circuit is enhanced, and the impact resistance and the vibration resistance and other harsh environment resistance and the insulation performance for the electronic device and components are increased. The encapsulation process of the invention is applied to engineering test under various harsh environments and complex conditions, and has good practical effect.

The present disclosure relates to a mobile terminal capable of providing optimal vibration power through sweeping of vibration frequencies, and a vibration power control method thereof. When a specific touch is detected after setting frequency sweep information in form of table in a memory, at least one sweep frequency is swept at a preset period within a vibration frequency range exhibiting satisfactory vibration power using the frequency sweep information so as to drive a vibration motor, thereby maintaining vibration power always in an optimal state. Also, a driving voltage of the vibration motor may be dropped to reduce battery consumption while driving the vibration motor, and the sweep frequency range and the sweep period can be adaptively changed according to a type of application displayed on a screen to stably maintain vibration power irrespective of a change in an application.

The invention discloses a method for providing feedback and an electronic device, relates to the field of electronic device application, and aims at solving the problem that an actuator of the electronic device cannot provide force feedback in a specific direction according to users' operation. The method comprises the steps of acquiring first operation performed by a user on a touch display unit; generating operation indication information based on the first operation; generating one or more first parameters according to the operation indication information, wherein the first parameters are used for representing the movement status of the first operation; indicating the actuator to vibrate in a first direction according to the first parameters and accordingly, providing the force feedback in the first direction. The method is mainly applied to the vibration process of the electronic device according to the users' operation.

The invention relates to a sounding device. The device has a first shell provided with a first accommodating space, a first magnet contained in the first shell, a second shell oppositely arranged in aspaced mode, the second shell being provided with a second containing space, an elastic piece connected with the first shell and the second shell and elastically supporting the first shell, and a second magnet and a coil contained in the second shell. The second shell comprises a bottom wall and a magnetic conductive column which extends from the center of the bottom wall to the direction of thefirst shell and is located in the second containing space, the coil is coupled to the magnetic conductive column, and the second magnet is arranged on the peripheral side of the coil. The sounding device has the beneficial effects that the integration of the sound production device with other equipment and structures is realized, the structure is simple, and the manufacturing cost is low.

The invention relates to the field of cell engineering, and more specifically discloses a multi-dimensional oscillation device for hematopoietic stem cells. Multi-dimensional oscillation can be performed on a mixed solution of hematopoietic stem cells and a protective agent, and simultaneously, a box body filled with the hematopoietic stem cells and the protective agent further can rotate to improve the effect of oscillation in the oscillation process, so that the operation of manually shaking the box body by a medical worker is eliminated, the time and labor are saved, the labor intensity ofthe workers is reduced, and the cells are prevented from being damaged when the cell solution is stirred by using an agitating blade directly. Multi-dimensional oscillation can be performed on a mixedsolution of hematopoietic stem cells and a protective agent, and simultaneously, a box body filled with the hematopoietic stem cells and the protective agent further can rotate to improve the effectof oscillation in the oscillation process, so that the operation of manually shaking the box body by a medical worker is eliminated, the time and labor are saved, the labor intensity of the workers isreduced, and the cells are prevented from being damaged when the cell solution is stirred by using an agitating blade directly.

The invention relates to a clamping sleeve type metal sealing pipe joint and a using method thereof. The clamping sleeve type metal sealing pipe joint comprises a joint body, a clamping sleeve and a nut, wherein the joint body and the nut are in threaded connection, the clamping sleeve is arranged between the joint body and the nut, the clamping sleeve is a metal piece, the clamping sleeve is provided with a front cutting edge and a rear cutting edge, the front end of the clamping sleeve is matched with a conical surface of the joint body, the rear end of the clamping sleeve is matched with a conical surface of the inner surface of the nut, and sealing is realized by enabling the front cutting edge and the rear cutting edge to be cut in the outer wall of a pipe. According to the clamping sleeve type metal sealing pipe joint disclosed by the invention, the structure of two cutting edges is adopted, the sealing performance is more reliable, the anti-shock performance and the anti-vibration performance are more excellent, and the service life is long.

The invention relates to an intelligent foot tub having comprehensive massage functions. The foot tub comprises a water storage barrel, massage devices, a heater, a water drainage device, universal wheels, a barrel cover, a hinge and adjusting switches, wherein the massage devices are located inside the water storage barrel; the heater is mounted at the lower end of the water storage barrel and is an electric heater; the water drainage device is mounted on the outer side wall of the back end of the water storage barrel; the universal wheels are uniformly and symmetrically mounted on the lower end surface of the water storage barrel; the barrel cover is located right above the front end of the water storage barrel and is connected with a semi-oval cover plate of the water storage barrel through the hinge; a handle is arranged on the barrel cover; the adjusting switches are mounted on the upper end surface of the semi-oval cover plate of the water storage barrel. The foot tub can massage soles and toes of human feet synchronously during foot bathing, the massage comprehensiveness is high, and the limitation that common foot massage devices can only massage a certain part of a foot is broken through; meanwhile, the heating water temperature, time and frequency are adjustable, simple and convenient drainage is realized, and the foot tub is more applicable to life at home.

The invention discloses a vertical vibration forming process and a forming device for a reinforced concrete pipe. The vertical vibration forming device comprises a base, and a support frame, a pipe mold and a vibration device mounted on the base, wherein a conveying slide rail is arranged on the base; the pipe mold is mounted on the conveying slide rail; the vibration device includes a mechanicalvibrator, a first knocking module and a lifting module; and the first knocking module includes a hanging disc, a knocking motor, a rotating shaft and a knocking rod. The vertical vibration forming device is excellent in vibration effect and uniform in vibration, improves the quality of the reinforced concrete pipe, is high in vibration efficiency, accelerates vibration forming of the reinforced concrete pipe, and is high in production efficiency.

The invention relates to mineral separation anti-blockage screening equipment having the dedusting function. The mineral separation anti-blockage screening equipment comprises a main body, a screeningnet and four support feet and further comprises a dedusting mechanism and a vibrating mechanism. The vibrating mechanism comprises a vibrating block, a beating block, a beating plate, a support shaft, an adjustment rod and a driving assembly. The dedusting mechanism comprises a water tank, an air exhaust assembly and two dedusting assemblies. Each dedusting assembly comprises a connecting pipe, ahose, a connecting box, a suction nozzle, a fixing rod and a power unit. According to the mineral separation anti-blockage screening equipment having the dedusting function, the screening net can vibrate through the vibrating mechanism, and the problem that the screening effect is affected due to the fact that dust on the screening net blocks the screening net is avoided; and by means of the dedusting mechanism, the dedustiong work of the interior of the main body can be conducted, and the problem that the dust is scattered in all directions to affect the air environment is avoided.

The invention provides an axial loading system and a loading method and belongs to the technical field of geotechnical engineering. A first piston and a second piston are arranged in a pipe barrel, a swelling agent is arranged between the first piston and the second piston, the pipe barrel is arranged between a loaded body and a pressure sensor, the second piston is in contact with the loaded body, the loaded body is in contact with a rigid frame body, the first piston is in contact with the pressure sensor, and the pressure sensor is in contact with the rigid frame body. The loading method comprises the following steps that: the pressure sensor is arranged on the rigid frame body; the first piston is arranged in the bottom of the pipe barrel, and the pipe barrel is arranged on the pressure sensor; the swelling agent is filled into the pipe barrel, and a plastic film covers the swelling agent after the swelling agent is tamped to be smooth; the second piston is put in the pipe barrel, and the loaded body is arranged on the upper surface of the second piston; along with the swelling of the volume of the swelling agent, the swelling agent can axially push the first piston and the second piston, and the pressure sensor can be used for recording a value of swelling pressure applied to the loaded body and transferring the value to a statical strain indicator.

The invention discloses a secondary speed-reduction rear driving axle assembly. The secondary speed-reduction rear driving axle assembly comprises a rear axle housing assembly which is horizontally arranged, a main speed reduction belt differential mechanism assembly arranged in the middle of the rear axle housing assembly, wheel hub assemblies arranged at the two ends of the rear axle housing assembly, two disc type brake assemblies and two half axles; the top and bottom of the rear axle housing assembly of the main speed reduction belt differential mechanism assembly are horizontal; the top and bottom of a main speed reducer housing are horizontal; each wheel hub assembly comprises a wheel hub and a wheel side speed reducer which are rotationally arranged at the two ends of the rear axle housing assembly; each wheel side speed reducer comprises a wheel side speed reducer housing, a gear ring, a solar wheel, a planet carrier, more than one planet wheel and an end cover arranged at the end part of the wheel hub assembly; and each planet wheel is engaged with the corresponding solar wheel and the corresponding gear ring at the same time, and each wheel hub and the corresponding wheel side speed reducer housing are in an integrated structure. The secondary speed-reduction rear driving axle assembly has the beneficial effects of compact structure, light weight and wide main speed reduction ratio covering range, and the height of a base plate can be effectively lowered.

The invention discloses an environment-friendly plastic injection mold, and belongs to the field of injection molds. The environment-friendly plastic injection mold is characterized in that through the arrangement of a thermal ball chain, when a molten material is injected, the temperature rises, and air in thermal collision balls is heated to expand, so that the distance between every two adjacent thermal collision balls on the thermal ball chain is reduced; and through cooperation with self-hardening bags, repulsive force exists between every two adjacent thermal collision balls, the thermalcollision balls which are close to each other are in an unstable state, the thermal collision balls continuously move in a self-vibration cavity, and the moving degree of the thermal collision ballsis increased when the thermal collision balls expand increasingly along with continuous injection of molten material, the thermal collision balls collide with the inner wall of the self-vibration cavity, therefore, the thermal ball chain generates a vibration effect on the injected molten material, the number of bubbles in the molten material is remarkably reduced, the quality and strength of a finished product are higher, the situation of local cracking or breaking during use is effectively avoided, and the service life is prolonged.

The invention discloses a physical system of a coherent population trapping atomic clock. The physical system comprises a laser emission unit and a physical unit which are separately arranged in the space. The laser emission unit comprises a laser emitter substrate, a laser emitter arranged on the laser emitter substrate, metal heat conduction members arranged on the laser emitter substrate and distributed around the laser emitter, and an attenuation slice arranged on a light path formed by a light source emitted by the laser emitter. The physical unit comprises a quarter-wave plate, an absorption bubble, a photocell, a photocell substrate, a metal heat conduction layer, a magnetic field coil, a magnetic shielding layer, a magnetic shielding layer top cover, a heat-insulation layer and a data transmission line. With respect to the physical system of the coherent population trapping atomic clock, the laser emission unit and the physical unit are separated in the space, the thermal transmission phenomenon does not occur, and therefore work stability of the atomic clock can be guaranteed.

The invention provides a concrete vibrator capable of adjusting a frequency. The concrete vibrator capable of adjusting the frequency comprises a clubbed base assembly made of nonferromagnetic materials; an axis direction sliding cavity is formed in the base assembly; the interior of the base assemble is matched with an iron sliding block which can slide in the axis direction; a conical cavity isformed in the sliding block; the diameter of the front end of the conical cavity is greater than the diameter of the rear end; two sides of a sidling area in the sliding block are separately providedwith electromagnets; the electromagnets are electrically connected with a control module outside the base assembly; one or none electromagnet is electrified at the same time by the control module; therear end of the base assembly is provide with a coupling to connect a flexible shaft outside the base assembly and a rotating shaft in the base assembly; a free end of the rotating shaft is connectedwith an oscillating bar in a pivot mode; and a free end of the oscillating bar stretches into the conical cavity, and is connected with a wobbler which can slide freely on the inner wall of the conical cavity in a coupling mode. During the working process, the vibrator can continuously adjust the vibration frequency to output more abundant vibration waves, and the vibrator is beneficial to improve the vibratory effect.

The invention relates to an electric machine, in particular a starter device (10) for an internal combustion engine. The electric machine comprises a noise-optimized toothing system (232, 234) of two gearwheels (22, 25) which can be brought into engagement with one another. The noise-optimized toothing system (232, 234) is configured as an extra-deep toothing system on at least one of the gearwheels (22, 25). The extra-deep toothing system has an asymmetrical toothing profile (214).