CN211705259U

CN211705259U - Novel myopia rehabilitation device

Info

Publication number: CN211705259U
Application number: CN201922315432.2U
Authority: CN
Inventors: 曾镜锵
Original assignee: Nanjing Waschel Biotechnology Co ltd
Current assignee: Jiangsu Huoyan Optometry Biotechnology Group Co ltd
Priority date: 2019-12-21
Filing date: 2019-12-21
Publication date: 2020-10-20
Anticipated expiration: 2029-12-21

Abstract

A novel myopia rehabilitation device comprises an ultrasonic generator body, an ultrasonic transduction piece body, a stabilized voltage power supply, a power switch, a four-core power plug, a four-core power socket, an electric heating piece, a frame body and a control circuit; the ultrasonic generator body and the stabilized voltage supply are arranged in the element box and are electrically connected with the four-core power plug; the frame body is divided into a left eye frame and a right eye frame, the two ultrasonic energy conversion pieces and the electric heating piece are respectively arranged in the left eye frame and the right eye frame, and the four-core power socket and the control circuit are arranged in a shell body in the middle of the support frame of the frame body and are electrically connected with the ultrasonic energy conversion pieces and the electric heating piece. This is novel need not people's hand massage, and under the constant temperature heating piece combined action, the high frequency vibration that ultrasonic transducer piece produced can go deep into the infiltration eye muscle crowd in, softens ciliary muscle, improves eye muscle crowd metabolism, promotes its blood circulation, amazing ciliary muscle nervous system and cell reviving to reach good eyesight recovery effect, and brought the convenience for the user.

Description

Novel myopia rehabilitation device

Technical Field

The utility model relates to a myopia physical rehabilitation device technical field, especially a novel myopia rehabilitation device.

Background

Due to incorrect use of eyes, the proportion of myopia is increasing in teenagers and the like. The reason for the myopia of the teenagers is mainly that the accommodation capacity of the eyes of the teenagers is particularly strong, the high adaptability is provided for short-distance work and study, when the ciliary muscles of the eyes are excessively tensed for a long time in short-distance study or game, the muscles of the eyes can not completely recover, the function of the muscles is degraded due to the accumulation of time, the accommodation myopia is caused due to the reduction of the elasticity of the muscles, and the myopia can become irreversible true myopia if the muscles are not eliminated in time and develop continuously. The muscle massage (one of the eye exercises) around the eyes can relieve the tension problem of ciliary muscles of the eyes, promote the blood circulation around the eyes, play a role in recovering the vision, prevent the degree of myopia from increasing continuously, and particularly have better effect on pseudomyopia. But the hand massage needs certain skill, and massage time is longer, can bring fatigue for massage person's hand, and the hand is along the massage of eye periphery top skin moreover, can't directly play good effect to the deep intraformational ciliary muscle of skin and musculature blood circulation, therefore its application has certain limitation, can't reach better vision correction effect.

The ultrasonic device is generally composed of an ultrasonic generator and an ultrasonic transducer (transducer plate), wherein when the ultrasonic device works, an ultrasonic driving power supply generated by the ultrasonic generator enters the ultrasonic transducer, and the ultrasonic transducer converts input electric power into mechanical power (namely ultrasonic high-frequency vibration) and then transmits the mechanical power. The high-frequency vibration mechanical effect of the ultrasonic wave is used for human health care, and can soften tissues, enhance permeation, improve metabolism, promote blood circulation, stimulate the recovery of nervous system and cell functions and the like, so the ultrasonic wave has unique therapeutic significance in human rehabilitation and the like. In summary, it is necessary to provide a myopia rehabilitation device using ultrasonic energy for myopia rehabilitation of human eyes, which is convenient to use.

SUMMERY OF THE UTILITY MODEL

Do not have a suitable equipment in order to overcome current myopia rehabilitation, artifical massage eye needs certain skill, myopia person oneself can bring hand fatigue when long-time massage, and the hand massage effect can't effectively go deep into intraocular layer muscle crowd and ciliary muscle, the not ideal drawback of recovered effect to myopia, the utility model provides a can conveniently wear in the use at user's eye, the in-process does not need the massage of people hand, under the heat combined action of constant temperature heating plate, the high frequency vibration that ultrasonic transducer piece produced can go deep into in the infiltration eye muscle crowd, soften ciliary muscle, improve eye muscle crowd metabolism, promote its blood circulation, amazing ciliary muscle nervous system and cell reviving to reach good eyesight recovery effect, and brought convenient novel myopia recovery equipment for the user.

The utility model provides a technical scheme that its technical problem adopted is:

a novel myopia rehabilitation device comprises an ultrasonic generator body, an ultrasonic transduction piece body, a stabilized voltage power supply, a power switch, a four-core power plug, a four-core power socket, an electric heating piece and a frame body, and is characterized by also comprising a control circuit; the ultrasonic generator body and the stabilized voltage supply are arranged in the element box, the two power input ends of the ultrasonic generator body and the stabilized voltage supply are respectively connected with the two poles of a 220V alternating current power supply through leads, and the two power output ends of the stabilized voltage supply and the two power output ends of the ultrasonic generator are respectively connected with the four wiring ends of the four-core power plug through leads; the frame body is divided into a left eye frame and a right eye frame, and the two ultrasonic energy conversion piece bodies are respectively and fixedly arranged in the front ends of the left eye frame and the right eye frame; the inner sides of the left eye frame and the right eye frame are provided with internal threads, and the two front clapboards are respectively arranged at the inner front parts of the left eye frame and the right eye frame and are positioned at the rear side of the ultrasonic wave energy conversion sheet body; the two electric heating sheets are fixedly arranged on the rear sides of the two front partition plates, and the rear partition plate is respectively arranged on the inner rear parts of the left eye frame and the right eye frame and is positioned on the rear sides of the electric heating sheets; the four-core power socket and the control circuit are arranged in a shell in the middle of the support frame of the frame body, and the jacks of the four-core power socket are positioned in the holes at one end of the shell; the first jack and the second jack of the four-core power socket are respectively connected with the control circuit, and the two ends of the power input of the two parallel electric heating sheets are respectively connected with each other through wires; two flexible fixing strips are fixedly mounted at the left end and the right end of the frame body respectively, and a four-core power plug is inserted into a four-core power socket.

Further, the stabilized voltage supply is an alternating current to direct current switching power supply module.

Furthermore, the outer side of the four-core power plug is provided with a rectangular protrusion distributed from top to bottom, and the inner side of the four-core power socket is provided with a rectangular groove distributed from top to bottom.

Further, the electric heating sheet is a PTC constant temperature heating sheet.

The control circuit comprises an adjustable resistor, a resistor, an electrolytic capacitor, an NPN triode, a PNP triode and a relay, wherein the adjustable resistor, the electrolytic capacitor, the NPN triode, the PNP triode and the relay are connected through a circuit board in a wiring mode, one end of the adjustable resistor is connected with an emitting electrode of the PNP triode, a collecting electrode of the PNP triode is connected with an anode power supply input end of the relay, the other end of the adjustable resistor is connected with an anode of the electrolytic capacitor and one end of the resistor, the other end of the resistor is connected with a base electrode of the NPN triode, a.

The utility model has the advantages that: insert four-core power plug in four-core supply socket before this novel use to bond this two novel fixed cloth rear sides in the head rear end, thereby the framework is located people's eye front end, middle part and the laminating of people's eye contour behind the support frame of two back baffles, framework. When the eye-protecting device is used, under the combined action of the ultrasonic generator body and the ultrasonic transduction piece body, the ultrasonic transduction piece body can generate high-frequency vibration to act on muscle tissues of human eyes through the frame body, and the high-frequency vibration generated by the ultrasonic transduction piece body can penetrate into muscle groups (including ciliary muscles) of the human body and generate resonance, so that the ciliary muscles can be softened, the metabolism of the muscle groups of the eyes can be improved, the blood circulation of the muscle groups can be promoted, the nervous system of the ciliary muscles can be stimulated, the cells can be restored to vitality, and a good vision recovery effect can be achieved. In this is novel, the electric heating piece can provide homothermal heat and act on human eye surrounding tissue, and the heat can play the effect of invigorating blood circulation and promoting musculature metabolism, therefore eyesight recovery effect is better. This novel control circuit has, and the user can adjust the time of using at every turn as required, uses up back equipment automatic shutdown work, and everybody can carry out the selection of eye rehabilitation time as required moreover, and it is more convenient to use. The utility model overcomes the shortsighted oneself can bring hand fatigue when massaging for a long time to and the hand massage effect can't effectively go deep into eye inner layer muscle crowd and ciliary muscle, the drawback that is not ideal to the recovered effect of myopia. Based on the above, so the utility model discloses good application prospect has.

Drawings

The invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the ultrasonic generator body, a regulated power supply, a power switch and a four-core power plug of the utility model.

Fig. 2 is a schematic structural diagram of the ultrasonic transducer body, the four-core power socket, the electric heating plate, the frame body and the control circuit of the present invention.

Fig. 3 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, a novel myopia rehabilitation device comprises an ultrasonic generator body 1, an ultrasonic transduction piece body 2, a stabilized voltage power supply 3, a power switch 4, a four-core power plug 5, a four-core power socket 6, an electric heating piece 7, a frame body 8 and a control circuit 9; the ultrasonic generator body 1 and the stabilized voltage power supply 3 are arranged on a circuit board in the element box 10 and connected through a lead, the power switch 4 is arranged in an opening at the upper part of the front left part of the element box 10, and an operating handle of the power switch 4 is positioned at the front outer side of the element box 10; the four-core power plug 5 is positioned outside the element box 10, and a lead connected with the four-core power plug has a certain length; the plastic frame body 8 is divided into a left part and a right part, the middle part is a support frame 81, the left part and the right part of the frame body are respectively a round left eye frame 82 and a round right eye frame 83, and the two ultrasonic transducer bodies 2 are respectively fixed and installed inside the front ends of the left eye frame 82 and the right eye frame 83 through screws (the outer sides of the front ends of the left eye frame 82 and the right eye frame 83 are of a closed structure); the inner sides of the left eye frame 82 and the right eye frame 83 are provided with internal threads from front to back, two circular plastic front partition plates 84 with external threads on the outer sides are screwed into the internal threads on the inner front sides of the left eye frame 82 and the right eye frame 83 respectively, and the two front partition plates 84 are arranged on the inner front parts of the left eye frame 82 and the right eye frame 83 respectively and are positioned on the rear side of the ultrasonic transducer body 2; the two electric heating plates 7 are fixed on the rear sides of the two front partition plates 84 through screws, the two circular plastic rear partition plates 85 with external threads on the outer sides are screwed into the internal threads on the rear sides of the left eye frame 83 and the right eye frame 84 respectively, and the two rear partition plates 85 are installed on the inner rear parts of the left eye frame 82 and the right eye frame 83 respectively and are positioned on the rear sides of the electric heating plates 7; the two rear clapboards 85, the rear middle parts of the supporting frames 81 of the frame body are attached to the outline of eyes of a person, the rear outer side peripheries of the two rear clapboards 85 and the rear sides of the left end and the right end of the frame body 8 are in a straight line, and the surface is smooth; the four-core power socket 6 and the control circuit 9 are installed on the circuit board, the circuit board is installed in a shell in the middle of a support frame 81 of the frame body, jacks of the four-core power socket 6 are positioned in openings at the upper end of the shell, so that a four-core power plug 5 can be inserted conveniently, openings are formed between the shell and the right end of a left eye frame 82 and between the shell and the left end of a right eye frame 83, and lead wires connected with the electric heating sheet 7 and the ultrasonic energy conversion sheet body 2 can be led in and led out conveniently; two flexible fixing cloth strips 11 are fixedly installed at the left end and the right end of the frame body 8 respectively, fibers 12 of hook and loop fasteners and barbed bristles 13 are sewn on the rear right side and the rear front left side of the two fixing cloth strips 11 respectively, and the four-core power plug 5 is inserted into the four-core power socket 6. The two fixing cloth strips 11 can also be replaced by elastic rubber belts.

As shown in fig. 1 and 2, the ultrasonic generator body 1 is a finished product of an ultrasonic generator of a brand noda, model HN. The ultrasonic transducer body 2 is a finished product of an ultrasonic transducer for massage of a brand SWT and a model number 8D28, and has a diameter of 28 mm and a thickness of 1.4 mm. Power switch 4 is ordinary button power switch, four-core power plug 5's external diameter is less than four-core power socket 6's internal diameter, four-core power plug 5's the outside has a rectangle arch 51 that distributes from top to bottom, four-core power socket 6's inboard has a rectangle recess 61 that distributes from top to bottom, four-core power plug 5 inserts back in four-core power socket 6, rectangle arch 51 is located rectangle recess 61 (prevents that four inserted bars of four-core power plug 5 from inserting four jack mistake in four jack of four-core power socket 6), four inserted bars of four-core power plug 5 just insert respectively in four jack of four-core power socket 6.

As shown in fig. 2 and 3, the regulated power supply a1 is a finished product of a brand bright weft alternating current 220V-to-12V switching power supply module. The electric heating plate RT is a PTC constant temperature heating plate with the brand WEISI/Weishi of 40 ℃, the diameter is 30 mm, and the thickness is 6 mm. The control circuit comprises an adjustable resistor RP, a resistor R1, an electrolytic capacitor C1, an NPN triode Q1, a PNP triode Q2 and a relay J, wherein the adjustable resistor RP, the resistor R1, the electrolytic capacitor C3875, the NPN triode Q1, a PNP triode Q2 collector and a relay J are connected through circuit board wiring, one end of the adjustable resistor RP is connected with an emitting electrode of the PNP triode Q2, the other end of the adjustable resistor RP is connected with a positive electrode of an electrolytic capacitor C1 and one end of a resistor R1, the other end of the resistor R1 is connected with a base electrode of the NPN triode Q1, a collector electrode of the NPN triode Q1 is connected with a base electrode of the PNP triode Q2, a negative electrode of the electrolytic capacitor C1 is connected with an emitting electrode of an NPN triode Q1 and a negative electrode power. The ultrasonic generator body A2, power input two

ends

1 and 2 pins of a stabilized voltage power supply A1 and two poles of a 220V alternating current power supply are respectively connected through leads, a power switch S is connected in series between the power input end 1 pin of the stabilized voltage power supply A1 and the 220V alternating current power supply, and the power output two

ends

3 and 4 pins of a stabilized voltage circuit A1 and the power output two

ends

3 and 4 pins of the ultrasonic generator A2 are respectively connected with the first terminal, the second terminal, the third terminal and the fourth terminal of a four-core power plug CT through leads. The first jack and the second jack of the four-core power socket CZ, one end of an adjustable resistor RP at the power input ends of the control circuit and an emitting electrode of an NPN triode Q1 are respectively connected through leads, the first jack, the second jack and two power input ends of two parallel electric heating sheets RT are respectively connected through leads, the third jack of the four-core power socket CZ is connected with the control power input end of a relay J of the control circuit through leads, and the power output end of the control circuit, the normally closed contact end of the relay J, the fourth jack of the four-core power socket CZ and the power input ends of the two ultrasonic transducer body B1 and B2 are respectively connected through leads.

As shown in fig. 1, 2 and 3, before use, a user inserts a four-core power plug CT into a four-core power socket CZ, and inserts power plugs of a switch power supply a1 and an ultrasonic generator body a2 into a mains supply 220V power socket; then the two novel fixed cloth strips are bonded together through the fibers 12 of the fastening tapes and the barbed bristles 13, so that the novel fixed cloth strips 11 surround the head of a person to play a role in fixing, at the moment, the frame body 8 is positioned at the front end of the eyes of the person, and the rear middle parts of the two rear partition plates 85 and the support frame 81 of the frame body are attached to the eye contour of the person. After the switch power supply A1 and the ultrasonic generator body A2 are electrified to work, the switch power supply A1 outputs a stable 12V positive and negative pole power supply under the action of an internal circuit, and the 3 and 4 pins of the power supply A are supplied with power for the control circuit and the two electric heating plates RT through the first and second inserting rods of the four-core power plug CT, so that the two electric heating plates RT are electrified to generate heat, the heat output at 40 ℃ is always kept under the action of an internal temperature control switch, and the heat is radiated by the two rear partition plates 85 to play a role of thermal therapy for the periphery of the eye socket of a user; after the ultrasonic generator body A2 is electrified to work, under the action of an internal circuit, ultrasonic driving power supplies output by the 3 and 4 pins of the two ultrasonic driving power supplies enter the relay J control power supply input end of the control circuit and the power supply input ends of the two ultrasonic energy conversion pieces B1 and B2 through the third and fourth plug rods of the four-core power plug CT and the third and fourth plug holes of the four-core power socket CZ. After the control circuit is powered on to work, the anode of a 12V power supply can charge an electrolytic capacitor C1 through an adjustable resistor RP, when the electrolytic capacitor C1 is not fully charged within 15 seconds, the voltage of the power supply entering the base electrode of an NPN triode Q1 is lower than 0.7V after the voltage is reduced and the current is limited through a resistor R1, the NPN triode Q1 is in a cut-off state, and then a relay J cannot be powered on to attract the input end of the control power supply to be communicated with a normally closed contact end; because the control power input end of the relay J is communicated with the third jack of the four-core power socket CZ, the normally closed contact end of the relay J is connected with the power input ends of the two ultrasonic energy conversion piece bodies B1 and B2, and the power input ends of the two ultrasonic energy conversion pieces B1 and B2 are communicated with the fourth jack of the four-core power socket CZ, at the moment, an ultrasonic driving power supply output by the ultrasonic energy converter body A2 enters the power input ends of the two ultrasonic energy conversion pieces B1 and B2, the two ultrasonic energy conversion pieces B1 and B2 can be electrified to work, and thus, the ultrasonic driving power supply input by the ultrasonic energy converter body A2 is converted into high-frequency mechanical vibration by the two ultrasonic energy conversion pieces B1 and B2; the high-frequency vibration generated by the ultrasonic transducer body B1 and B2 acts on the muscle tissue of the human eyes through the frame body 8, and the high-frequency vibration generated by the ultrasonic transducer body B1 and B2 can go deep into the muscle group (including ciliary muscle) of the human body and generate resonance, so that the ciliary muscle can be softened, the metabolism of the muscle group of the eyes can be improved, the blood circulation can be promoted, the nervous system of the ciliary muscle can be stimulated, the cells can be revived, and the good vision recovery effect can be achieved. In this is novel, electric heating piece RT can provide homothermal heat and act on human eyes tissue around, and the heat can play the effect that the blood circulation promoted and promote muscle tissue metabolism, therefore combines the high frequency mechanical vibration that ultrasonic wave transduction piece body B1 and B2 produced, and eyesight recovery effect is better. The control circuit is electrified to work, the anode of a 12V power supply can charge an electrolytic capacitor C1 through an adjustable resistor RP, after about 15 seconds, the electrolytic capacitor C1 is fully charged, at the moment, the voltage of the power supply entering the base of an NPN triode Q1 after the power supply is subjected to voltage reduction and current limitation through a resistor R1 is higher than 0.7V, then, the NPN triode Q1 is in a conducting state, the collector of the NPN triode Q1 outputs a low level and enters the base of a PNP triode Q2, and the PNP triode Q2 is conducted, the collector of the PNP triode Q2 outputs a high level and; because the power input end of the negative electrode of the relay J is communicated with the negative electrode of the 12V power supply, the control power input end of the relay J is communicated with the third jack of the four-core power socket CZ at the moment, and the normally closed contact end of the relay J is connected with the power input ends of the two ultrasonic energy conversion sheet bodies B1 and B2, the relay J can be electrified to attract the control power input end and the normally closed contact end to be opened, and then the power input ends of the two ultrasonic energy conversion sheet bodies B1 and B2 are electrified and do not work any more, thereby completing one-time use process. In practical cases, by adjusting the adjusting handle of the adjustable resistor RP, the charging time of the electrolytic capacitor C1, that is, the on-time of the NPN transistor Q1, can be changed, and the operating time of the two ultrasonic transducer bodies B1 and B2 can be changed. After an adjusting knob of the adjustable resistor RP is adjusted leftwards, the resistance value of the adjustable resistor RP is reduced, the charging time of the electrolytic capacitor C1 is shortened, and then the voltage is reduced and the current is limited by a resistor R1, and the power supply is relatively short, and then the power supply can exceed 0.7V, so that the NPN triode Q1 and the PNP triode Q2 are sequentially conducted, the relay J is electrified, the input end of the power supply and the normally closed contact end are controlled to be opened, and the two ultrasonic energy conversion sheet bodies B1 and B2 stop working in relatively short time. Its resistance value grow after adjustable resistance RP's adjust knob right, electrolytic capacitor C1 charging time becomes long, just can exceed 0.7V after the relatively long time of power after resistance R1 step-down current-limiting so NPN triode Q1, PNP triode Q2 switch on in succession, relay J gets electric actuation control power input end and normally closed contact end and opens a way, two ultrasonic transducer body B1 and B2 stop work in relatively long time, this novel longest time is 20 seconds. In fig. 3, the resistance R1 is 470K; the relay J is a DC4123 type 12V miniature relay of Songle brand; the model of the NPN triode Q1 is 9013, and the model of the PNP triode Q2 is 9012; the electrolytic capacitor C1 is 10 mu F/25V in specification; the adjustable resistance RP is 1.8M.

The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A novel myopia rehabilitation device comprises an ultrasonic generator body, an ultrasonic transduction piece body, a stabilized voltage power supply, a power switch, a four-core power plug, a four-core power socket, an electric heating piece and a frame body, and is characterized by also comprising a control circuit; the ultrasonic generator body and the stabilized voltage supply are arranged in the element box, the two power input ends of the ultrasonic generator body and the stabilized voltage supply are respectively connected with the two poles of a 220V alternating current power supply through leads, and the two power output ends of the stabilized voltage supply and the two power output ends of the ultrasonic generator are respectively connected with the four wiring ends of the four-core power plug through leads; the frame body is divided into a left eye frame and a right eye frame, and the two ultrasonic energy conversion piece bodies are respectively and fixedly arranged in the front ends of the left eye frame and the right eye frame; the inner sides of the left eye frame and the right eye frame are provided with internal threads, and the two front clapboards are respectively arranged at the inner front parts of the left eye frame and the right eye frame and are positioned at the rear side of the ultrasonic wave energy conversion sheet body; the two electric heating sheets are fixedly arranged on the rear sides of the two front partition plates, and the rear partition plate is respectively arranged on the inner rear parts of the left eye frame and the right eye frame and is positioned on the rear sides of the electric heating sheets; the four-core power socket and the control circuit are arranged in a shell in the middle of the support frame of the frame body, and the jacks of the four-core power socket are positioned in the holes at one end of the shell; the first jack and the second jack of the four-core power socket are respectively connected with the control circuit, and the two ends of the power input of the two parallel electric heating sheets are respectively connected with each other through wires; two flexible fixing strips are fixedly mounted at the left end and the right end of the frame body respectively, and a four-core power plug is inserted into a four-core power socket.

2. The novel myopia rehabilitation apparatus of claim 1, wherein the regulated power supply is an ac-to-dc switching power supply module.

3. The novel myopia rehabilitation device of claim 1, wherein the four-pin power plug has a rectangular protrusion extending from top to bottom on the outer side thereof, and the four-pin power socket has a rectangular recess extending from top to bottom on the inner side thereof.

4. The novel myopia rehabilitation apparatus of claim 1, wherein the electrical heating plate is a PTC thermostatic heating plate.

5. The novel myopia rehabilitation device according to claim 1, wherein the control circuit comprises an adjustable resistor, a resistor, an electrolytic capacitor, an NPN triode, a PNP triode and a relay, the adjustable resistor, the electrolytic capacitor, the NPN triode, the PNP triode and the relay are connected through a circuit board, one end of the adjustable resistor is connected with an emitting electrode of the PNP triode, a collecting electrode of the PNP triode is connected with a positive power supply input end of the relay, the other end of the adjustable resistor is connected with a positive electrode of the electrolytic capacitor and one end of the resistor, the other end of the resistor is connected with a base electrode of the NPN triode, the collecting electrode of the NP.