Balay > Physics variable force spring
Gisulbad sa power spring ang problema sa insulin syringe
Gisulbad sa power spring ang problema sa insulin syringe
Mention of diabetes, I think everyone is not strange. Data show that by the end of 2021, the total number of type 2 diabetes in China was about 120 million. When oral hypoglycemic agents are standardized and blood glucose control is still unsatisfactory, insulin injection is an inevitable choice for the treatment of type 2 diabetes. Many may not know that insulin injections require dedicated syringes. Some kids are worried. Does injection take technical issues into account ? Actually don 't worry at all, because what, because the use of the Qianye  power spring ! Qianye power spring can provide small and highly accurate drug dose. The quantitative drug is injected into the body through the spring fixed force, thrust and homing speed. The thrust distribution of the steel strip spring accurately matches the sliding force of the traditional syringe. It solves the problem of emission tolerance of the syringe and provides a high thrust demand for highly viscous solution.    ...
Ang Pangunang Papel Sa Motor Brush Spring Sa Wind-Turbine Design
Ang Pangunang Papel Sa Motor Brush Spring Sa Wind-Turbine Design
Wind-turbines are proven to create reliable and pollution-free energy, and as technology innovates, the cost to develop and manufacturer them is only becoming more affordable. Research demonstrates that to get the most return on turbines, whether onshore or offshore: the bigger the turbine, the better. There are two reasons for this: larger rotors and blades increase the total potential production capacity of the turbine, while higher fixtures and blades are higher in the atmosphere, increasing the power it can actually produce. These two factors are the driving forces behind the efficiency of wind turbines and their ability to create renewable energy. However, in order to achieve this goal, the manufacture of wind turbines requires the use of dozens of parts, components and materials. Motor brush or carbon brush is a small and important part of wind turbine design.  An important part of wind turbine motor brush is motor brush spring. These springs play a key role in the efficient operation of...
Gibutyag nga mga Solusyon sa Power Cord
Gibutyag nga mga Solusyon sa Power Cord
As people are becoming more and more picky about the beauty of home appliances, the problems of dirt, vulnerability and difficult placement caused by the exposure of power lines have been unsatisfactory. However, with the take-up device, the wires are completely stored in the internal space after use, and these problems are solved. Its core component is the use of winding up. Take-up spring refers to a kind of rotary spring that puts the steel strip crimped once or twice into the fixed box, and then connects it through the middle mandrel to tighten it to the predetermined position. After releasing the preload when necessary, it uses the rebound force of the rolled steel strip to achieve the design purpose.     The utility model has the advantages that the utility model is designed for rotary use, and can be widely used in the circular design device, and forms a coaxial design with the take-up device, which saves space very much....
Kanunay nga kusog nga tingpamulak alang sa pagkaamgo sa hapsay nga paglihok sa lamesa sa pag-scan sa CT
Kanunay nga kusog nga tingpamulak alang sa pagkaamgo sa hapsay nga paglihok sa lamesa sa pag-scan sa CT
We are familiar with CT scanner. Now when we go to the hospital for examination, we often hear the doctor say "take a film first". This film generally refers to CT. Doing CT is not only for the safety of patients, but also for the safety of doctors. CT is much clearer than X-ray film. At the same time, there are many diseases that cannot be seen on B-ultrasound and can be diagnosed by CT. At present, CT is the most widely used imaging examination under medical treatment and the most valuable examination for clinical information. When you go to take CT, you lie down on the scanning table, and the scanning table will automatically move smoothly and accurately locate the position. Have you ever thought about this problem because you want to relieve tension? The CT scanner table can move smoothly and accurately because of the role of the constant force spring in it. Some little friends may not know what the...
Ang power spring nga gigamit sa safety belt sa sakyanan
Ang power spring nga gigamit sa safety belt sa sakyanan
Safety belt is equal to life belt. Everyone should see the painful accidents caused by not wearing safety belt. I believe everyone is familiar with the car safety belt. It is a safety device to avoid rushing out of the car during collision and causing death and injury. Automobile safety belt is recognized as the cheapest and most effective safety device, and it is also a necessary safety configuration. In a typical safety belt system, the safety belt is connected with a retractor. The core component of the retractor is the reel, which is connected with one end of the safety belt. Inside the retractor, with the help of the action of the power spring, the webbing can expand and contract freely with the movement of the user's body without loosening the webbing. In case of emergency braking, collision or sharp change of vehicle driving state, the sensitive element in the retractor will lock the reel to fix the webbing...
Ang Qianye innovative power spring adunay importante nga papel sa Hose Reel
Ang Qianye innovative power spring adunay importante nga papel sa Hose Reel
Hose Reel is also called pipe winder, Winder, reel, drum and air drum. Among many working equipment, the pipe winder is a very labor-saving and convenient long-distance energy transmission device. Its basic structure consists of hose, power spring, rotating shaft and other safety mechanisms.         The power spring of the hose reel can stretch and shrink the pipeline, intensively manage various energy pipelines, and change the previous phenomenon that the pipeline, power plug, oxyacetylene pipeline, bulb, spray gun and other tools are scattered in disorder. It can be used alone or in combination, which greatly saves the factory space, beautifies the working environment and improves the grade of the enterprise. Improve the working environment. The power spring is made of rolled steel strip. A spring box is required to limit its outer diameter in use. The center of the spring is connected with the shaft. When an external force is applied to make the shaft rotate relative to the spring, the spring will roll on...
Mga bentaha sa Qianye kanunay nga kusog nga tingpamulak sa teknolohiya
Mga bentaha sa Qianye kanunay nga kusog nga tingpamulak sa teknolohiya
Spring is a commonly used component in industry. It is used in all kinds of products, from aircraft and warships to mobile phones and cameras. Therefore, the production of spring has a history of hundreds of years. Constant force spring has the characteristic of maintaining constant force in long stroke. Its function can be applied to the application of products that need linear movement such as round-trip, sliding, stretching, homing, balancing or labor-saving, such as lifting doors and windows, computer display and fan height adjustment, store display shelf or motor carbon brush motor. On the market, constant force spring manufacturers generally use eight claw spring machine, which is called eight claw machine for short. The eight claw spring machine is continuously developed on the basis of three axes. The eight position claw arms of the eight claw spring machine can rotate 360 degrees in the forward and reverse directions. The working sequence of the curved arms is determined by the...
Pamaagi sa paglimpyo sa nawong sa stainless steel spring
Pamaagi sa paglimpyo sa nawong sa stainless steel spring
The spring of thousand industry precision hair has excellent application in different fields, for example, the products of the company have been widely used in LCD display lifting bracket, automobile special motor, medical treatment, lifting fan, lifting window accessories, vacuum cleaner, sales rack and other fields. With the development of modern technology, stainless steel hairline, as a more common elastic element in modern technology, has a huge function and its application is becoming more and more obvious. The company is to provide professional stainless steel hair spring surface treatment methods. 1、 Two methods of removing oxide skin and oil pollution by spring are as follows: 1. Dilute the cleaning agent and clean water in ultrasonic equipment about 1:30. When the spring surface is free of oxygen, no oil and the metal color is appropriate, then take out water and clean it. In this way, the treated stainless steel hair surface can achieve the effect of sub light. 2. Dilute the...
Physics variable force spring Product
 Variable force spring
Variable force spring
Kinaiya: Ang dagway sa variable force spring ug variable torsion spring susama kaayo sa kanunay nga force spring ug constant torsion spring. Variable force springs ug variable torsion springs mahimong makalusot sa impluwensya sa balaod ni Hooke sa tradisyonal nga mga tubod, aron ang stroke ug force dili na motaas sa proporsyonal, apan makab-ot ang nagkalain-laing elastic force-displacement nga mga kombinasyon sama sa negatibong slope stepped constant force, nga mahimong mechanically. Para sa mga kinahanglanon sa inhenyero, gamita ang relasyon tali sa elastic force ug displacement stroke aron sa pagdesinyo sa nagkalain-laing elastic curve nga mga kausaban sa piho nga mga aplikasyon. Adunay usa ka lain-laing mga lain-laing mga lain-laing mga tinubdan sa puwersa, variable torsion spring aplikasyon disenyo, ug mga solusyon. Ang manufacturing range sa variable force springs ug variable torsion springs: Ang gibag-on mao ang 0.05 ~ 0.85mm, ug ang gilapdon mao ang 2.0 ~ 65mm.
 Carbon brush spring
Carbon brush spring
Kinaiya: 1. Tungod sa kanunay nga pwersa, bisan unsa pa ang gitas-on sa carbon brush ug ang commutator, ang presyur nagpabilin nga pareho. 2. Ang kanunay nga puwersa sa tingpamulak makapakunhod sa pagkawala sa carbon brush, nagpalugway sa kinabuhi sa carbon brush, ug makapamenos sa kasamtangan nga pagkawala. Sa 3. Ang gagmay nga mga motor mahimong gidisenyo aron makunhuran ang gawas nga diametro sa motor. 4. Ang gitas-on sa carbon brush mahimong madugangan. Sa 5. Ang mas dako nga commutator mahimong magamit. Sa 6. Pagpakunhod sa mga aligato ug pagpakunhod sa electromagnetic interference. Kanunay nga puwersa sa spring alang sa single roll carbon brush 1. Carbon brush gilapdon 2. Carbon brush gitas-on: Ang spring gilapdon kinahanglan nga mas gamay kay sa carbon brush gitas-on 3. Gitas-on sa abradable carbon brush: Ang spring stroke kinahanglan nga mas dako pa kay sa gitas-on sa abradable carbon brush 4. Gikinahanglan ang pressure sa kontak para sa carbon brush ug commutator: gikinahanglan nga spring force Constant force spring para sa double-rolled carbon brush 1. Carbon brush width 2. Carbon brush height: Ang spring width kinahanglan nga...
 Serbisyo sa disenyo sa pag-optimize
Serbisyo sa disenyo sa pag-optimize
Gikan sa mga ideya sa produkto, disenyo hangtod sa nahuman nga paghimo sa produkto, makatabang kami sa mga kostumer sa pagkompleto niini, ug matabangan ang mga kostumer nga ma-optimize ang ilang mga produkto gikan sa propesyonal nga panan-aw sa paggamit sa tingpamulak, mapadali ang pag-uswag sa produkto, ug mapadali ang oras sa merkado. Gikan sa inisyal nga yugto sa disenyo sa sangkap sa tingpamulak, paghimo hangtod sa katapusan nga asembliya, gipili sa mga kustomer ang mga bentaha nga makuha ni Qianye. 1. Pag-save sa oras sa pag-uswag sa produkto 2. Paghatag kanimo usa ka lainlaing mga solusyon, pilia ang gusto nga solusyon sa pag-optimize 3. Ang tingpamulak nga labing angay sa imong produkto 4. Pag-alagad kanimo alang sa kinabuhi ug pagtagbaw sa bisan unsang teknikal nga suporta nga naa kanimo.
 Mga serbisyo sa pag-assemble ug pag-mount
Mga serbisyo sa pag-assemble ug pag-mount
Ang Qianye Company dili lamang naghatag sa produksyon sa tukma nga mga tubod, apan naka-focus usab sa structural design ug functional nga mga solusyon sa tibuok spring system, ug makahatag sa usa ka kompleto nga set sa sistema sa produksyon ug asembliya
 Kanunay nga torsion spring
Kanunay nga torsion spring
Kinaiya: Ang fixed (kanunayon) torque spring (spring) ginama sa stainless steel. Ang puwersa sa gawas nag-rewind sa mainspring gikan sa natural nga kahimtang niini ngadto sa output wheel (pagtipig sa enerhiya). Sa diha nga ang gawas nga pwersa gikuha, ang tubod mobalik sa iyang natural nga kahimtang. Sa samang higayon, ang usa ka kanunay nga torque force (gitipigan nga pagkamaunat-unat nga pwersa) ang namugna (gipagawas) sa output ligid, mao nga kini gitawag nga usa ka kanunay nga torque generator. huboon. Nahisakop sa (usa ka paagi sa paggamit sa kanunay nga kusog nga tingpamulak) Kaayohan: Ang mga bentaha sa fixed-torque nga mga tubod kon itandi sa gahum (scroll) nga mga tubod: 1. Ang torque dili mausab tungod sa pagtaas sa gidaghanon sa mga rebolusyon. Sa 2. Walay limitasyon sa gidaghanon sa mga magamit nga turno, ug ang disenyo sa multi-turn turns kasagaran nagsagop sa usa ka fixed-torque spring. Sa 3. Ang gidaghanon sa dili balido nga mga rotation gamay ra, mas daghang enerhiya ang mahimong tipigan, ug ang kahusayan mas taas. Ngadto sa Manufacturing range sa fixed torque spring: Ang gibag-on mao ang 0.05 ~ 0.85mm, ug ang gilapdon ...
 Gahum Spring
Gahum Spring
Characteristic: The power spring is coiled by steel strip. A spring box is required to limit its outer diameter. The center of the spring is connected to the shaft. When an external force is applied to make the shaft and the spring rotate relative to each other, the spring will be wound on the shaft and stored Torsion, when the external force disappears, the spring generates torsion on the shaft or spring box. Advantage: Power springs are divided into natural power springs and pre-stressed power springs according to their relaxed shape. In contrast, the pre-force type power spring can store 25% to 55% more torque and provide more effective turns. Product manufacturing range: The thickness is 0.05~0.85mm, and the width is 2.0~60mm. Principle of the scene: The high-precision pen injector uses a unique power spring to provide small and highly accurate drug dosages. A fixed amount of medicine is injected into the body through the constant force of the spring...
Physics variable force spring News
 Ang disenyo sa aplikasyon sa kanunay nga torsion spring sa salag sa bisikleta
Ang disenyo sa aplikasyon sa kanunay nga torsion spring sa salag sa bisikleta

Oras: 2022-9-14

 The bicycle nest is an automatic lifting device for bicycles, which is placed on the ceiling of the room and can be stably raised and stored on the roof. It can safely accommodate any bike, no matter its shape or size.    The storage method is simple. If you need to get on the bike, gently pull on the loose rope, then push the bike down and the bike will be lifted. If you want to take the bike off, you just have to gently pull your bike down and let the bike fall to the ground. This bike rack is designed so that you can easily place your bike, and you can store your bike almost anywhere. It maximizes the bike's on-road storage space. What makes this unit unique is its unique spring mechanism. You don't need power or pulleys to easily lift the bike for you, just your fingertips guide. The unique spring mechanism is the key reason the bike nest moves the bike up and down, making this spring challenging to make. There are strict requirements on the length and stability of the spring, and the spring that does not meet the standard is unqualified. The bicycle nest is attached to your ceiling with two bolts and uses a spring mechanism to raise your bike. Just like a functioning set of blinds, a gentle pull on the cable will bring your bike to the ground. You can also park the bike anywhere while it's down, which means the bike nest also doubles as a light workbench.The corresponding thickness shall...
 Pamaagi sa paglimpyo sa nawong sa stainless steel spring
Pamaagi sa paglimpyo sa nawong sa stainless steel spring

Oras:2022-9-13

The spring of thousand industry precision hair has excellent application in different fields, for example, the products of the company have been widely used in LCD display lifting bracket, automobile special motor, medical treatment, lifting fan, lifting window accessories, vacuum cleaner, sales rack and other fields. With the development of modern technology, stainless steel hairline, as a more common elastic element in modern technology, has a huge function and its application is becoming more and more obvious. The company is to provide professional stainless steel hair spring surface treatment methods. 1、 Two methods of removing oxide skin and oil pollution by spring are as follows: 1. Dilute the cleaning agent and clean water in ultrasonic equipment about 1:30. When the spring surface is free of oxygen, no oil and the metal color is appropriate, then take out water and clean it. In this way, the treated stainless steel hair surface can achieve the effect of sub light. 2. Dilute the cleaning agent and clean water as 1:1 or 1:2, and then immerse the stainless steel hair strip into the solution until the surface of the spring is free of oxygen and no oil to restore to the metal color. Then take out the water and clean it. After this treatment, the stainless steel hair surface is also used to achieve the effect of Matt. 2、 Two methods of bright surface of the spring are as follows: 1. The volume of spring and coarse abrasive is matched according to 1:3. The amount of cleaning agent is 1% to 2% of the...
 Ang power spring makaamgo sa libre nga pagbayaw ug pagpaubos sa chandelier
Ang power spring makaamgo sa libre nga pagbayaw ug pagpaubos sa chandelier

Oras: 2022-9-14

Ang chandelier usa ka sagad nga suga, nga kaylap nga gigamit sa mga opisina, exhibition hall, sala, restawran ug uban pang mga lugar. Kini popular kaayo tungod sa iyang katahom. Apan karon ang kasagaran nga mga chandelier sa kasagaran gi-install nga adunay gitakda nga gitas-on nga nagbitay. Kung gusto nimo i-adjust ang nagbitay nga gitas-on sa lampara, mahimo ra nimo kini i-adjust sa mano-mano. Ang proseso sa pag-adjust komplikado. Busa, usa ka chandelier nga adunay yano nga istruktura ug sayon nga pag-instalar nga awtomatik nga mag-adjust sa nagbitay nga wire nga mitumaw. Ang chandelier nga awtomatik nga mag-adjust sa nagbitay nga wire nakaamgo nga ang gitas-on mahimo lamang nga i-adjust pinaagi sa pag-alsa sa lampara pataas o pagbira niini paubos. Kung ang lawas sa lampara naa sa posisyon sa nagbitay nga gitas-on, ang nagbitay nga wire mahimo nga awtomatiko nga i-adjust ang mabag-o nga gitas-on sa nagbitay nga wire pinaagi sa adjuster. Ang nagbitay nga gitas-on sa lampara mahimong ipasibo pinaagi sa pag-adjust sa lawas sa lampara. Usa ka chandelier nga awtomatik nga mag-adjust sa nagbitay nga wire, lakip na ang nagbitay nga wire, ang nagbitay nga wire automatic adjuster, ang lamp body, ug ang ceiling box. Ang lawas sa lampara naglakip sa usa ka tinubdan sa kahayag sa LED ug usa ka suplay sa kuryente sa pagmaneho; ang automatic suspension wire adjuster gitukod ngadto sa ceiling plate, ang usa ka tumoy sa suspension wire gitipigan sa wire receiving groove sa automatic suspension wire adjuster, ug ang pikas tumoy gikuha gikan sa ceiling box cover. Ang wire trough mogawas pinaagi sa mga lungag ug konektado ug giayo sa lawas sa lampara; ang posisyon sa gitas-on sa suspensyon sa lawas sa lampara sa chandelier mao ang posisyon sa gitas-on sa suspensyon nga gipadayon sa...
 Paggamit sa mga tubod sa kuryente sa mga kagamitan sa pagpanalipod sa pagtukod
Paggamit sa mga tubod sa kuryente sa mga kagamitan sa pagpanalipod sa pagtukod

Oras: 2022-9-14

 With the development of society, buildings and roads are the cornerstone of the development of human society. People will choose to lay waterproof materials during waterproof maintenance, but people face some problems when laying waterproof materials. When laying waterproof materials, people inadvertently trample on the materials because they do not know that the materials have been laid, resulting in uneven laying of materials and economic losses. Therefore, we need to protect the sites under construction and just completed construction when laying. Many of the existing protective devices are large, which is not conducive to people's carrying, and the protective devices can't be seen by people at night, causing people's damage. The laying of water-proof materials is wasted, and the placement of protective devices is unbalanced, causing collapse and damage to people.   The utility model relates to a wet laying waterproof coiled material construction protective device equipped with a power spring, which can solve the above problems. The power spring requires a housing to limit its outside diameter. The spring stores force during the rotation of the power spring relative to the central axis of the spring housing. When the force disappears, the power spring will produce a torque on the central shaft of the spring housing.   The protective device comprises two expansion columns 1, a contraction device 21, a second fixing block 4 and two expansion columns 1, one of which is provided with a contraction device 21. The retracting device 21 is composed of two rotating discs 12, the first fixed column 13 and the power spring 14. The rotating disc 12 is installed in the...
 Disenyo sa kanunay nga kusog nga mga tubod
Disenyo sa kanunay nga kusog nga mga tubod

Oras: 2022-9-14

 A constant force spring is a spring that exerts a constant force over its range of motion. That is, it does not obey Hooke's law. Typically, a constant force spring is constructed as a coiled band of spring steel so that the spring relaxes when fully coiled. When it is unrolled, the restoring force comes mainly from the portion of the belt that is close to the roll. Since the geometry of this region remains nearly constant as the spring unfolds, the resultant force is nearly constant.       By creating a spring with a variable pitch, you can make a push-shape spring with a constant velocity. Placing a larger pitch in a larger outer diameter coil and a smaller pitch in a smaller outer diameter coil will force the single spring to fold all coils at the same rate when compressed.       Design of Constant Force Springs: A constant force spring is a coil of prestressed tape that exerts a nearly constant restraining force against unwinding (Figures 1 and 2). The force is constant because the change in the radius of curvature is constant. This is the case if the change in coil diameter due to buildup is not taken into account. Long reach, constant torque and virtually no friction have led many designers to specify constant force springs in applications such as sliding doors and windows and height adjustment of computer monitors and fans, store display shelves or motor carbon brush motors . Constant force motor springs are also used to drive mechanisms for timers,...
 Tradisyonal nga mga tubod sa kuryente ug mga tubo nga preloaded
Tradisyonal nga mga tubod sa kuryente ug mga tubo nga preloaded

Oras: 2022-9-3

Traditional power springs and preloaded power springs are fabricated from spring steel bars to provide torque. Spring steel is a low alloy, medium carbon steel or high carbon steel with a very high yield strength. Objects made of spring steel can return to their original shape despite significant bending or twisting. Power springs use flat (unstressed) steel windings, while pre-stressed power springs use pre-stressed steel to produce a larger range of usable torque than conventional power springs.          During the manufacturing process, the spring is wound into the retaining ring or the customer's housing (the retaining ring is pictured below). When ready for final installation, carefully install the spring into its housing with the outer end attached to the outer edge and the inner end attached to the mandrel (see photo below). During operation, the housing or mandrel will be fixed while the other component is free to rotate. Depending on the requirements of your specific design, it may be beneficial to use a fixed mandrel/free box or free box/fixed mandrel arrangement.        These springs are typically used to retract the cord or cable of the spool. You might see it in lawn mowers, retractable lanyards, or dog leashes. This is also the type of spring used to drive many mechanical clocks and timers, which is why they are sometimes called "clock springs". The load provided by the spring increases with the cross-sectional area of ​​the material. The number of turns the spring can provide depends on the space available between the mandrel and the...
 7 tips for maximizing spring cycle life
7 tips for maximizing spring cycle life

Oras:2022-9-15

Spring is a kind of mechanical part that uses elasticity to work. The parts made of elastic materials deform under the action of external force, and return to the original state after removing the external force. Also known as "spring". It is generally made of spring steel, and the types of springs are complex and diverse. The following tips to maximize the service life of the spring are also of great concern to you!     1. Lower Stress, The Better! In the early design stages of a spring, try designing with a larger wire diameter or a lower final load to allow more room for the spring to improve cycle life.     2. Shot Peening A shot peened spring can handle more stressful conditions than unpeened springs. This process can greatly improve performance and sustainability.     3. Keep Cool Spring relaxation or loss in spring load occurs faster in high temperature applications due to stress over time. Reducing operating temperatures can reduce the chances of spring relaxation.     4. Using The Right Material Material selection of a spring is key to good spring design. Consult with a Lee Spring Engineer to determine if upgrading to a higher tensile range or quality grade material can improve cycle life for a particular application.     5. Minimize Shock Loading Shock loading occurs when a load is applied with sufficient speed for the first coils of the spring to take up more of the load than what would be calculated for a static situation. The more times a spring...
 Gisulbad sa power spring ang problema sa insulin syringe
Gisulbad sa power spring ang problema sa insulin syringe

Oras: 2022-9-14

Mention of diabetes, I think everyone is not strange. Data show that by the end of 2021, the total number of type 2 diabetes in China was about 120 million. When oral hypoglycemic agents are standardized and blood glucose control is still unsatisfactory, insulin injection is an inevitable choice for the treatment of type 2 diabetes. Many may not know that insulin injections require dedicated syringes. Some kids are worried. Does injection take technical issues into account ? Actually don 't worry at all, because what, because the use of the Qianye  power spring ! Qianye power spring can provide small and highly accurate drug dose. The quantitative drug is injected into the body through the spring fixed force, thrust and homing speed. The thrust distribution of the steel strip spring accurately matches the sliding force of the traditional syringe. It solves the problem of emission tolerance of the syringe and provides a high thrust demand for highly viscous solution.     The device of insulin injection pen consists of handle, needle cap body, trigger device, insulin needle, needle hole and dynamic spring. The trigger device is started by the button to make the spring inside the needle cap contract instantaneously, and the spring elasticity drives the needle to penetrate into the subcutaneous tissue at a certain depth instantly, so as to effectively relieve the fear and pain of the patients, reduce the trauma area, improve the treatment compliance, enable the patients to carry out effective site rotation injection, and improve the treatment effect.  The reason why insulin injection needs special syringes...