CN111282093B

CN111282093B - Multifunctional insulin pen

Info

Publication number: CN111282093B
Application number: CN202010117768.2A
Authority: CN
Inventors: 吴菲菲
Original assignee: Wuxi Childrens Hospital
Current assignee: Wuxi Childrens Hospital
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2022-08-09
Anticipated expiration: 2040-02-25
Also published as: CN111282093A

Abstract

The invention provides a multifunctional insulin pen which comprises a pen holder, wherein the pen holder is of a hollow structure, a display screen is arranged at the rear end of the pen holder, a microprocessor, a timer and a dosage adjusting device are arranged in the pen holder, a button is arranged on the outer surface of the pen holder, the front end of the pen holder is movably connected with the rear end of a pen rack, a needle head is movably connected with the front end of the pen rack, the pen rack is of a hollow structure, an insulin refill is arranged in the pen rack, the microprocessor drives the dosage adjusting device to move to complete insulin injection, the needle head is pulled out after the timed time is up, a pen cap is sleeved on the outer surface of the pen rack, and an injection part prompting card is arranged in the pen cap. The invention adjusts the timer through the timing button, sends the required timing time to the microprocessor, the microprocessor displays the timing process through the display screen, and the microprocessor conveniently knows the time process, meanwhile, the microprocessor sends the timing time to the alarm device, when the required time is reached, the alarm device is started to remind the patient to pull out the needle, and the insulin is ensured to completely enter the body of the patient.

Description

Multifunctional insulin pen

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a multifunctional insulin pen.

Background

Diabetes is a type of metabolic disease characterized by hyperglycemia, and can be classified into type 1 diabetes and type 2 diabetes. Type 1 diabetes is a disease that must be controlled by in vitro injection of insulin due to absolute insufficient insulin secretion in vivo, and it frequently occurs in children and adolescents. Type 2 diabetes is a disease which can stimulate insulin secretion in vivo due to relative insufficient insulin secretion in vivo, mostly occurs after the age of 35-40 years, and accounts for more than 90% of patients with diabetes, but the patients with the type 2 diabetes need to directly inject insulin from outside of the body to control related diseases in later period of the disease. The published data shows that about 3.82 hundred million adults have diabetes in 2013 worldwide, wherein the number of diabetic patients in China is the first to be about 1.14 million worldwide.

Insulin injection is the most effective and widely applied treatment mode, and patients can conveniently inject insulin by themselves. When the patient injects insulin by oneself, the insulin is mostly extracted in the insulin bottle through the injector, the process is complicated, and when the insulin is injected in public places, embarrassment is easily caused. Therefore, insulin pens are produced.

When the patient passes through insulin pen injection insulin, after the liquid medicine injection is accomplished, guarantee at least that the syringe needle stops more than ten seconds at subcutaneous tissue layer, confirm that the complete entering patient of insulin is internal, prevent the liquid medicine seepage simultaneously. In the current operation process, do not have the timer of unified standard, mostly through patient's heart crime number, the time is held inaccurately, and troublesome poeration, it is inconvenient to use.

According to different diseases, the number of times of insulin injection required by a patient is generally 2-3 times per day, but a series of adverse reactions such as swelling, erythema, stasis, induration, blisters and the like can occur after long-term injection at the same part of a human body. In order to avoid the adverse reaction, an insulin injection positioning card appears in the prior art. The existing insulin injection positioning card has a large area and is inconvenient to carry.

Disclosure of Invention

The invention aims to provide an insulin pen, in particular to a multifunctional insulin pen which is simple in structure, convenient to operate, capable of timing, automatically giving an alarm when the insulin reaches a set time, provided with a display screen, automatically displaying dosage, provided with an injection position prompt card, capable of avoiding repeated injection at one position, high in automation degree and capable of being recycled.

In order to solve the technical problems, the invention adopts the technical scheme that: a multifunctional insulin pen comprises a pen holder, wherein the pen holder is of a hollow structure, a display screen is arranged at the rear end of the pen holder and used for displaying injection dosage and timing time, a microprocessor, a timer and a dosage adjusting device are arranged inside the pen holder, a button is arranged on the outer surface of the pen holder and used for adjusting the timer and the dosage adjusting device so as to adjust the timing time and the injection dosage, the microprocessor is respectively connected with the display screen, the timer, the dosage adjusting device and the button, the front end of the pen holder is movably connected with the rear end of a pen rack, the front end of the pen rack is movably connected with a needle head, the pen rack is of a hollow structure, an insulin pen core is arranged inside the pen rack, the microprocessor drives the dosage adjusting device to move, insulin injection in the insulin pen core is realized, and the needle head is pulled out after the timing time reaches, the pen cap is sleeved on the outer surface of the pen rack, and an injection position prompting card is arranged in the pen cap.

Further, the pen cap is of a double-layer structure, the pen cap sequentially comprises an outer pen cap, a cavity and an inner pen cap from outside to inside, a long through hole is formed in the outer pen cap, the length direction of the long through hole is parallel to the central axis of the pen cap, a reset device is arranged in the cavity and connected with one end of an injection position prompt card, the injection position prompt card is arranged in the cavity in a rotating mode with the inner pen cap as the center, and the other end of the injection position prompt card is exposed out of the long through hole.

Furthermore, the outer surface of the injection position prompt card is sleeved with a protective sleeve, the protective sleeve is made of transparent materials, one end of the protective sleeve is connected with the reset device, the other end of the protective sleeve is exposed out of the strip through hole, and the injection position prompt card is movably arranged in the protective sleeve and is convenient to replace.

Furthermore, a plurality of injection parts are marked on the injection part prompt card according to time, a plurality of through holes are formed in the protective sleeve, and the through holes are aligned with the injection parts, so that the injection parts can be conveniently marked by a patient after injection.

Furthermore, the resetting device is a disc spring, the inner ring end of the disc spring is connected with the inner layer pen cap, and the outer ring of the disc spring is connected with the injection part prompting card or one end face of the protective sleeve.

Further, the protective sheath exposes the end of the strip through hole is provided with a limiting opening and closing device, so that the protective sheath can be pulled out of the strip through hole for replacement of the injection part prompt card in the protective sheath.

Furthermore, an alarm device is arranged on the outer surface of the pen holder and connected with the microprocessor, when the timing time is up, the timer sends a signal to the microprocessor, and the microprocessor drives the alarm device to work.

Further, the alarm device is an audible and visual alarm.

Further, dose adjusting device includes sleeve and telescopic link, telescopic link one end is arranged in the sleeve, the telescopic link other end is equipped with the roof, the roof with insulin refill tail end contacts.

Further, the button includes dose adjustment button, timing button and power button, dose adjustment button connects dose adjusting device, timing button connects the time-recorder, power button connects the power, the power is arranged in inside the pen-holder, the power is connected respectively microprocessor, dose adjusting device the time-recorder with the display screen.

The invention has the advantages and positive effects that:

1. the invention has simple structure and convenient operation, the patient sends the required dosage information to the microprocessor through the dosage adjusting button, and the microprocessor displays the dosage information through the display screen, thereby facilitating the confirmation of the patient and avoiding causing dosage error and influencing the body of the patient. Meanwhile, the microprocessor drives the movement stroke of the telescopic rod to release the insulin in the insulin pen core according to the dosage, so that the precision is high and the error is small.

2. The invention adjusts the timer through the timing button, sends the required timing time to the microprocessor, the microprocessor displays the timing process through the display screen, and is convenient for the patient to know the time process.

3. The injection site prompt card is arranged, so that multiple parts of a patient can conveniently and reasonably inject, and adverse reactions of swelling, erythema, stasis, induration, blister and the like caused by short injection time interval and high repeated injection probability of the same part of the patient are avoided.

4. According to the invention, the pen cap is of a double-layer structure, the injection position prompt card can be placed in the cavity and is connected through the reset device, the pen cap is pulled out during use and automatically retracts after use, and the pen cap is convenient to carry, strong in portability, simple in structure, few in parts, low in cost and suitable for popularization and application.

5. According to the invention, the protective sleeve is sleeved on the outer surface of the injection site prompting card, and the injection site prompting card is movably arranged in the protective sleeve, so that the injection site prompting card is convenient to replace at regular intervals and has strong real-time performance. Meanwhile, the protective sleeve is provided with the through holes corresponding to the injection parts on the injection part prompt card, after injection of the injection parts is completed, the through holes can be conveniently used for marking, repeated injection of the same injection part is avoided, and the practicability is high.

Drawings

Fig. 1 is an exploded view of the overall structure of an embodiment of the present invention.

Fig. 2 is an assembly schematic diagram of the overall structure of the embodiment of the invention.

Fig. 3 is a sectional view of a pen cap structure according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of the operation of an embodiment of the present invention.

Fig. 5 is a schematic view of an injection site prompt card according to an embodiment of the invention.

Fig. 6 is an interface circuit diagram of a display screen according to an embodiment of the present invention.

Fig. 7 is a circuit diagram of an alarm device according to an embodiment of the present invention.

In the figure:

1. pen cap 2, needle 3 and pen holder

4. Dose adjustment button 5, timing button 6, power button

7. Penholder 8, alarm device 9 and display screen

10. Microprocessor 11, timer 12, dose adjustment device

13. Injection site prompt card 14, outer pen cap 15 and cavity

16. Reset device 17, inner layer pen cap 18 and strip through hole

19. Insulin refill 20, top plate 21 and telescopic rod

22. Sleeve 23, through hole 24 and protective sleeve

25. The injection site.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Embodiments of the invention are further described below with reference to the accompanying drawings:

as shown in fig. 1 and 2, the multifunctional insulin pen comprises a pen holder 7, wherein the pen holder 7 is of a hollow structure, and a display screen 9 is arranged at the rear end of the pen holder 7 and used for displaying injection dosage and timing time. The cartridge 7 is internally provided with a microprocessor 10, a timer 11 and a dose adjustment means 12. The outer surface of the barrel 7 is provided with buttons for adjusting the timer 11 and the dose setting means 12, thereby adjusting the timing and the injected dose.

Specifically, the buttons comprise a dose adjusting button 4, a timing button 5 and a power button 6, the dose adjusting button 4 is connected with a dose adjusting device 12, the timing button 5 is connected with a timer 11, the power button 6 is connected with a power supply, the power supply is arranged in a penholder 7, and the power supply is respectively connected with a microprocessor 10, the dose adjusting device 12, the timer 11 and a display screen 9. The microprocessor 10 is connected to a display 9, a timer 11, a dose setting device 12 and buttons, respectively.

The front end of the penholder 7 is movably connected with the rear end of the penholder 3, and the front end of the penholder 3 is movably connected with the needle 2. The penholder 3 is hollow structure, and the inside insulin refill 19 that is equipped with of penholder 3, microprocessor 10 drive dosage adjusting device 12 motion realizes the insulin injection in the insulin refill 19, treats that the timing time reachs the back, extracts

syringe needle

2, and 3 outer surface covers of penholder have cap 1, are equipped with injection position suggestion card 13 in the cap 1.

This embodiment is through dose adjustment button 4, sends required dose information for microprocessor 10, and microprocessor 10 shows dose information through display screen 9, makes things convenient for the patient to confirm, avoids causing the dose error, influences the patient health. Meanwhile, the microprocessor 10 drives the movement stroke of the telescopic rod 21 to release the insulin in the insulin refill 19 according to the dosage, so that the precision is high and the error is small.

The dose adjustment means 12 is a means for adjusting the injection dose of the insulin cartridge 19, and the dose adjustment means 12 may have various structures as long as the above-described functions are achieved. Specifically, the dose adjustment device 12 of the present embodiment includes a sleeve 22 and an expansion link 21, one end of the expansion link 21 is disposed in the sleeve 22, the other end of the expansion link 21 is provided with a top plate 20, and the top plate 20 contacts with the tail end of the insulin pen core 19. The microprocessor 10 drives the telescopic rod 21 to move towards the insulin refill 19, and controls the injection amount of insulin in the insulin refill 19 by adjusting the movement stroke of the telescopic rod 21 extending into the insulin refill 19.

Preferably, the outer surface of the penholder 7 is provided with an alarm device 8, the alarm device 8 is connected with a microprocessor 10, when the timing time is reached, a timer 11 sends a signal to the microprocessor 10, and the microprocessor 10 drives the alarm device 8 to work. Specifically, the alarm device 8 of the present embodiment is an audible and visual alarm.

This embodiment is through timing button 5, adjusts time-recorder 11, sends required timing time for microprocessor 10, and microprocessor 10 shows the timing process through display screen 9, makes things convenient for the patient to know the time course, and simultaneously, microprocessor 10 will send timing time for alarm device 8, and when reacing required time, alarm device 8 starts, reminds the patient to pull out the needle, ensures that insulin gets into the patient completely internal, and insulin utilization rate is high, and it is effectual to inject.

The injection site prompt card 13 is arranged, so that multiple parts of the patient can conveniently and reasonably inject, and adverse reactions such as swelling, erythema, stasis, induration and blisters of the patient caused by short injection time interval and high repeated injection probability of the same part are avoided.

Specifically, as shown in fig. 3, the pen cap 1 has a double-layer structure, and the pen cap 1 sequentially includes an outer-layer pen cap 14, a cavity 15 and an inner-layer pen cap 17 from outside to inside. The outer pen cap 14 is provided with a strip through hole 18, and the length direction of the strip through hole 18 is parallel to the central axis of the pen cap 1. A resetting device 16 is arranged in the cavity 15, and the resetting device 16 is connected with one end of the injection site prompt card 13. The injection position prompting card 13 is arranged in the cavity 15 in a rotating way by taking the inner pen cap 17 as a center, and the other end of the injection position prompting card 13 is exposed out of the strip through hole 18.

This embodiment is through setting up pen cap 1 to bilayer structure, can arrange injection position suggestion card 13 in cavity 15, connects through resetting means 16, pulls out during the use, and the back that finishes using, automatic withdrawal, convenient to carry, the portability is strong, simple structure, and the part is few, and is with low costs, is fit for popularizing and applying.

Preferably, the outer surface of the injection site prompt card 13 is sleeved with a protective sleeve 24, the protective sleeve 24 is made of transparent materials, one end of the protective sleeve 24 is connected with the resetting device 16, the other end of the protective sleeve 24 is exposed out of the strip through hole 18, and the injection site prompt card 13 is movably arranged in the protective sleeve 24 and is convenient to replace.

Preferably, as shown in fig. 4, the injection site prompt card 13 is marked with a plurality of injection sites 25 according to time, the protective sleeve 24 is provided with a plurality of through holes 23, the through holes 23 are aligned with the injection sites 25 one by one, so that a patient can conveniently mark through the through holes 23, repeated injection of the same injection site 25 is avoided, and the practicability is high.

The end part of the protective sleeve 24 exposed out of the strip through hole 18 is provided with a limiting opening and closing device, so that the protective sleeve 24 can be conveniently pulled out of the strip through hole 18, and the injection part prompt card 13 in the protective sleeve 24 can be replaced.

Specifically, the reset device 16 is a disc spring, an inner ring end of the disc spring is connected with the inner layer pen cap 17, and an outer ring of the disc spring is connected with the injection position prompt card 13 or one end face of the protective sleeve 24.

Interaction between devices may be accomplished using a variety of signals and techniques. These signals and techniques include: orthogonal signals, CDMA, TDMA, FDMA, OFDMA, ultra wideband signals, chirp signals, laser signals, and many others. The signals to and from the microprocessor 10 and devices may be modulated (using AM, FM, PSK, FSK, MSK, QAM, or any other possible modulation) or may be otherwise encoded or configured to contain timing, synchronization, control, data, multipath signal component identification, security codes, information to ensure proper operation, and redundancy. Signals to and from microprocessor 10 and devices may include Gold codes, PN codes, M-Sequence codes, Walsh-Hadamard codes, or any other codes. The microprocessor 10 may be a conventional chip, a single chip, or a controller, and has a module with corresponding functions to drive the above devices to implement the above functions, which is not described herein again.

The microprocessor 10 is connected with the dose adjusting device 12, the buttons, the display 9, the alarm device 8, the timer 11 and other devices in a wired or wireless way. The wired connections may be connected by means of a serial bus, P1394, Thunderbolt, etc., and the wires in the wired connections are not shown in fig. 1 in order to avoid clutter. The wireless connection mode can be connected through modes such as Bluetooth, Bluetooth Low Energy, WIFI and Zigbee. As shown in fig. 5, a schematic diagram is shown in which the microprocessor 10 is connected to the dose setting device 12, the buttons, the display 9, the alarm device 8, the timer 11, and the like. The microprocessor 10 and the dose setting means 12, buttons, display 9, alarm means 8 and timer 11 may receive power via a wired or wireless connection, as well as from a disposable or rechargeable battery.

The working principle of the invention is as follows:

the injection site prompt card 13 is pulled out from the strip through hole 18, and the site 25 to be injected is selected. The injection position prompting card 13 is released, and the injection position prompting card 13 rebounds under the action of the resetting device 16 and is retracted into the cavity 15 of the pen cap 1. The cap 1 is opened, the pen holder 3 is unscrewed, the insulin refill 19 is placed in the pen holder 3, the pen holder 3 and the pen holder 7 are screwed down, the needle 2 is taken out, and the needle 2 and the pen holder 3 are screwed down. Adjust dose adjustment button 4, give microprocessor 10 with required dose information transmission, microprocessor 10 shows dose information through display screen 9, makes things convenient for the patient to confirm, avoids causing the dose error, influences the patient's health. At the same time, the microprocessor 10 drives the movement stroke of the telescopic rod 21 to release the insulin in the insulin pen core 19 according to the dosage.

After the injection is accomplished, through timing button 5, adjust time-recorder 11, send required timing time for microprocessor 10, microprocessor 10 shows the timing process through display screen 9, makes things convenient for the patient to know the time course, and simultaneously, microprocessor 10 sends timing time for alarm device 8, and when reaching required time, alarm device 8 starts, reminds the patient to pull out the needle, ensures that insulin gets into the patient completely internal.

After the patient pulls out the needle, the needle head 2 is unscrewed. The injection position prompt card 13 in the pen cap 1 is drawn out, the injection position 25 which is just completed is marked, repeated injection is avoided, and the pen cap 1 is fastened to facilitate the next injection.

The model of the display screen 9 selected by the embodiment is VGG12864E-S002 model, the resolution is 128 × 64, and a 64 × 64 display data RAM is built in the display screen. Each bit of data in the RAM corresponds to the light and dark state of a point on the display 9. So two pieces of column driver controllers are used, each piece outputting 64 rows of row drivers. The VGG12864E module is indirectly controlled to be connected to the microprocessor 10, the interface circuit of the display 9 is shown in fig. 6, the common chips of the interface circuit are P89C669, the P1 port of the P89C669 is used as the data port, P3.2 and P3.3 are used as the chip select signal, P3.4 is used as the reset control signal, P3.5 is the register select signal, P3.6 is the enable signal E, and P3.7 is the read/write signal.

The alarm circuit selected by the embodiment is controlled by a port P3.7 of the singlechip, outputs an alarm signal and drives the alarm circuit until a RESET key RESET and an on-off key are pressed.

The alarm circuit consists of a 555 timer, a sounder and a common light-emitting diode, and the circuit diagram is shown in figure 7.

The 555 timer is connected to form a low-frequency multivibrator, and a control voltage input terminal 5 pin of the low-frequency multivibrator is connected with a P3.7 terminal of the microprocessor 10 based on AT89C51 and is controlled by a pulse signal output by the P3.7 pin. Due to the charging, discharging and charging functions of the capacitor C4, the oscillation frequency of the 555 output pulse is low when P3.7 is equal to 1, and the oscillation frequency of the 555 output pulse is high when P3.7 is equal to 0. The pulse signal is added to a sounder through a separation capacitor C2, the sounder emits 2 kinds of alternative high and low sounds, and simultaneously, the pulse signal with the high and low level interval of 1 s output by a P3.7 pin is added to a light-emitting diode LED through a resistor R1, and the LED flashes and emits light to achieve the effect of simultaneously giving an alarm by sound and light.

The invention has the advantages and positive effects that:

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. A multifunctional insulin pen is characterized in that: the insulin injection pen comprises a pen holder, wherein the pen holder is of a hollow structure, a display screen is arranged at the rear end of the pen holder and used for displaying injection dosage and timing time, a microprocessor, a timer and a dosage adjusting device are arranged inside the pen holder, a button is arranged on the outer surface of the pen holder and used for adjusting the timer and the dosage adjusting device so as to adjust the timing time and the injection dosage, the microprocessor is respectively connected with the display screen, the timer, the dosage adjusting device and the button, the front end of the pen holder is movably connected with the rear end of a pen rack, the front end of the pen rack is movably connected with a needle head, the pen rack is of a hollow structure, an insulin pen core is arranged inside the pen rack, the microprocessor drives the dosage adjusting device to move to realize insulin injection in the insulin pen core, the needle head is pulled out after the timing time reaches, and a pen cap is sleeved on the outer surface of the pen rack, an injection position prompt card is arranged in the pen cap;

the pen cap is of a double-layer structure and comprises an outer-layer pen cap, a cavity and an inner-layer pen cap from outside to inside in sequence, a strip-shaped through hole is formed in the outer-layer pen cap, the length direction of the strip-shaped through hole is parallel to the central axis of the pen cap, a reset device is arranged in the cavity and connected with one end of an injection part prompt card, the injection part prompt card is rotatably arranged in the cavity by taking the inner-layer pen cap as a center, and the other end of the injection part prompt card is exposed out of the strip-shaped through hole;

the outer surface of the injection site prompting card is sleeved with a protective sleeve, the protective sleeve is made of transparent materials, one end of the protective sleeve is connected with the resetting device, the other end of the protective sleeve is exposed out of the strip through hole, and the injection site prompting card is movably arranged in the protective sleeve and is convenient to replace;

the protective sheath exposes the end part of the long strip through hole is provided with a limiting opening and closing device, so that the protective sheath can be pulled out of the long strip through hole and replaced by the injection part prompt card in the protective sheath.

2. The multifunctional insulin pen of claim 1, wherein: the injection site prompting card is provided with a plurality of injection sites according to time, the protective sleeve is provided with a plurality of through holes, and the through holes are aligned with the injection sites, so that the injection sites can be conveniently marked by a patient after injection.

3. The multifunctional insulin pen according to any one of claims 1 or 2, wherein: the reset device is a disc spring, the inner ring end of the disc spring is connected with the inner layer pen cap, and the outer ring of the disc spring is connected with the injection part prompt card or one end face of the protective sleeve.

4. The multifunctional insulin pen of claim 1, wherein: the outer surface of the pen holder is provided with an alarm device, the alarm device is connected with the microprocessor, when the timing time is up, the timer sends a signal to the microprocessor, and the microprocessor drives the alarm device to work.

5. The multifunctional insulin pen of claim 4, wherein: the alarm device is an audible and visual alarm.

6. The multifunctional insulin pen according to any one of claims 1, 2 or 5, wherein: dose adjusting device includes sleeve and telescopic link, telescopic link one end is arranged in the sleeve, the telescopic link other end is equipped with the roof, the roof with insulin refill tail end contacts.

7. The multifunctional insulin pen according to any one of claims 1, 2 or 5, wherein: the button includes dose adjustment button, timing button and power button, dose adjustment button connects dose adjusting device, timing button connects the time-recorder, power button connects the power, the power is arranged in inside the pen-holder, the power is connected respectively microprocessor dose adjusting device the time-recorder with the display screen.