A hot riveting heating device for a binding machine

Abstract

A hot riveting heating device for a binding machine comprises a riveting head structure and a circuit structure; the riveting head structure comprises a riveting head cover, a riveting head, a first electrode sheet, a heating sheet, a second electrode sheet and a riveting head seat, the riveting head cover is covered on the riveting head seat and forms an installation cavity inside, the riveting head, the first electrode sheet, the heating sheet and the second electrode sheet are sequentially installed in the installation cavity and are close to each other; the circuit structure comprises a main control module, a power module and a switch module, the switch module has an input end, an output end and a control end, the control end of the switch module is electrically connected to the output pin of the main control module, the input end of the switch module is electrically connected to the positive electrode of the power module, the output end of the switch module is electrically connected to the second electrode sheet, the negative electrode of the power module is electrically connected to the first electrode sheet, and the negative electrode of the power module is grounded. The hot riveting heating device for a binding machine has higher heat conduction efficiency and faster preheating.

Description

Technical Field

[0001] The utility model relates to the technical field of office stationery, in particular to a hot riveting heating device for a binding machine. Background Art

[0002] At present, the binding of paper materials such as archives and account books mostly adopts the plastic hose binding method. The plastic hose binding method requires punching holes in the documents to be bound first, inserting the plastic hose into the punched holes, and then hot riveting the two ends of the plastic hose to finally complete the binding of the documents. The rivet head heating of the binding machine transfers heat to the rivet head through the PTC heating sheet, thereby hot pressing the plastic hose. According to the existing technology, the two ends of the PTC heating sheet are respectively equipped with a positive electrode sheet and a negative electrode sheet. The two electrode sheets are electrically connected to the circuit board. The circuit board is controlled to energize the two electrode sheets, so that the heating sheet can be heated, and the heat is transferred to the rivet head, which can achieve the function of heating the rivet head.

[0003] An existing hot riveting heating device for a binding machine includes a rivet head structure and a circuit structure; Figure 1 As shown, the rivet head structure includes a rivet head cover 1a, a rivet head 2a, an insulating gasket 3a, a first electrode sheet 4a, a heating sheet 5a, a second electrode sheet 6a and a rivet head seat 7a. The rivet head cover 1a covers the rivet head seat 7a and forms an installation cavity inside. The rivet head 2a, the insulating gasket 3a, the first electrode sheet 4a, the heating sheet 5a, and the second electrode sheet 6a are sequentially installed in the installation cavity and are close to each other; Figure 2As shown, the circuit structure includes a main control module 8a, a power module 9a and a switch module 10a, the switch module 10a has an input terminal 11a, an output terminal 12a and a control terminal 13a, the control terminal 13a of the switch module 10a is electrically connected to the output pin HEAT' of the main control module 8a, the input terminal 11a of the switch module 10a is electrically connected to the negative electrode of the power module 9a, the negative electrode of the power module 9a is grounded, the output terminal 12a of the switch module 10a is electrically connected to the first electrode sheet 4a, the positive electrode of the power module 9a is electrically connected to the second The electrode sheet 6a is electrically connected; the switch module 10a includes a first resistor R1', a second resistor R2' and an NMOS tube T1', the output pin HEAT' of the main control module 8a is electrically connected to one end of the first resistor R1', the other end of the first resistor R1' is electrically connected to the gate of the NMOS tube T1' and one end of the second resistor R2', respectively, the source of the NMOS tube T1' and the other end of the second resistor R2' are both electrically connected to the negative electrode of the power module 9a, and the drain of the NMOS tube T1' is electrically connected to the first electrode sheet 4a. The hot riveting heating device of the binding machine directly connects the second electrode sheet 6a to the positive pole of the power module 9a, while the first electrode sheet 4a needs to pass through the switch module 10a before being electrically connected to the negative pole of the power module 9a. The switch module 10a is turned on, the first electrode sheet 4a is electrically connected to the negative pole of the power module 9a, and the negative pole of the power module 9a is grounded, that is, the first electrode sheet 4a is grounded, and the switch module 10a is turned off, the first electrode sheet 4a is disconnected from the negative pole of the power module 9a, that is, the first electrode sheet 4a is not grounded. Only when the switch module 10a is turned on to electrically connect the first electrode sheet 4a to the negative pole of the power module 9a, the heating sheet 5a will heat up. The conduction of the switch module 10a is specifically achieved by controlling the level of the gate of the NMOS tube T1'.

[0004] However, the existing hot riveting heating device of the binding machine has the following technical problems: whether the heating plate 5a generates heat is achieved by controlling the on-off of the negative pole of the power module 9a and the first electrode plate 4a, and a positioning pin is usually inserted in the axial direction of the rivet head structure, which is connected to the machine housing and will also contact the rivet head, and the machine housing, positioning pin and rivet head 2a are usually made of metal materials. The positioning pin is connected to the machine housing, which is equivalent to grounding, and the rivet head 2a is connected to the positioning pin, which is also equivalent to grounding. In order to avoid direct contact between the first electrode plate 4a and the rivet head 2a, which causes the first electrode plate 4a to be directly grounded, it is necessary to set an insulating gasket 3a between the first electrode plate 4a and the rivet head 2a to insulate the first electrode plate 4a from the rivet head 2a; otherwise, if The first electrode sheet 4a is in direct contact with the rivet head 2a and is grounded, so we cannot control the connection and disconnection of the negative pole of the power module 9a and the first electrode sheet 4a through the switch module 10a, that is, the switch module 10a fails, and it is impossible to control whether the heating sheet 5a is heated. Because the first electrode sheet 4a is directly grounded, and the second electrode sheet 6a is directly connected to the positive pole of the power module 9a, the heating sheet 5a is always in a heating state. Therefore, in order to avoid the failure of the switch module 10a and prevent the first electrode sheet 4a from being directly grounded due to the grounding of the rivet head 2a, the prior art needs to add an insulating gasket 3a between the first electrode sheet 4a and the rivet head 2a. However, after the insulating gasket 3a is added, the heat conduction efficiency from the heating sheet 5a to the rivet head 2a becomes poor, and the preheating time is longer. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a hot riveting heating device for a binding machine with higher heat conduction efficiency and faster preheating.

[0006] The technical solution of the utility model is: a hot riveting heating device of a binding machine, including a rivet head structure and a circuit structure; the rivet head structure includes a rivet head cover, a rivet head, a first electrode sheet, a heating sheet, a second electrode sheet and a rivet head seat, the rivet head cover covers the rivet head seat and forms an installation cavity inside, the rivet head, the first electrode sheet, the heating sheet and the second electrode sheet are sequentially installed in the installation cavity and are close to each other; the circuit structure includes a main control module, a power module and a switch module, the switch module has an input end, an output end and a control end, the control end of the switch module is electrically connected to the output pin of the main control module, the input end of the switch module is electrically connected to the positive electrode of the power module, the output end of the switch module is electrically connected to the second electrode sheet, the negative electrode of the power module is electrically connected to the first electrode sheet, the negative electrode of the power module is grounded, and the main control module controls the switch module to switch on and off the positive electrode of the power module and the second electrode sheet when its output pin changes.

[0007] The working principle of the hot riveting heating device of the binding machine of the utility model is as follows:

[0008] The first electrode sheet is directly connected to the negative electrode of the power module, and the second electrode sheet is electrically connected to the positive electrode of the power module through the switch module. The main control module controls the change of its output pin to control the on and off of the switch module, and then controls the on and off of the positive electrode of the power module and the second electrode sheet. When the switch module is turned on, the positive electrode of the power module is electrically connected to the second electrode sheet, and when the switch module is turned off, the positive electrode of the power module is disconnected from the second electrode sheet. Only when the first electrode sheet is turned on to the negative electrode of the power module and the second electrode sheet is turned on to the positive electrode of the power module, the heating sheet will generate heat, and the heat generated by the heating sheet will be directly transferred to the rivet head, thereby achieving the effect of quickly heating the rivet head.

[0009] After adopting the above structure, the utility model has the following advantages:

[0010] The hot riveting heating device of the binding machine of the utility model directly connects the first electrode sheet with the negative electrode of the power module, and arranges the switch module between the second electrode sheet and the positive electrode of the power module, so that whether the heating sheet generates heat is realized by controlling the on-off of the positive electrode of the power module and the second electrode sheet, and the second electrode sheet is not connected to the riveting head, which will not cause the switch module to fail; the first electrode sheet is directly connected to the negative electrode of the power module, and the negative electrode of the power module is grounded, that is, the first electrode sheet is directly grounded, so that the first electrode sheet is grounded like the riveting head, and there is no need to arrange a switch between the first electrode sheet and the riveting head. Insulating gasket; therefore, the first electrode sheet is directly connected to the negative pole of the power module and the control position of the switch module is changed, so that the first electrode sheet directly matches the grounding state of the rivet head, thereby eliminating the need to set an insulating gasket between the first electrode sheet and the rivet head, and setting the switch module between the second electrode sheet and the positive pole of the power module will not cause failure of the switch module, thereby effectively controlling whether the heating sheet generates heat; the rivet head and the first electrode sheet are directly and tightly arranged without setting an insulating gasket, so that the heat of the heating sheet can be transferred to the rivet head more quickly, with higher heat conduction efficiency and faster preheating.

[0011] Preferably, the switch module comprises a first resistor, a second resistor, a PMOS tube and a first triode, the first triode is an NPN type, the output pin of the main control module is electrically connected to the base of the first triode, the emitter of the first triode is grounded, the collector of the first triode is electrically connected to one end of the first resistor, the other end of the first resistor is electrically connected to the gate of the PMOS tube and one end of the second resistor respectively, the source of the PMOS tube and the other end of the second resistor are both electrically connected to the positive electrode of the power module, and the drain of the PMOS tube is electrically connected to the second electrode sheet. The switch module requires fewer parts, has a simple circuit structure, low cost and high reliability.

[0012] Preferably, the circuit structure further comprises a pluggable first terminal, and the first electrode sheet and the second electrode sheet are electrically connected to the negative electrode of the power module and the drain electrode of the PMOS tube respectively through the first terminal. This arrangement uses a pluggable terminal to connect the rivet head structure and the circuit structure, which is more convenient to use and install.

[0013] Preferably, the resistance of the first resistor is 1K, the resistance of the second resistor is 10K, and the voltage of the power module is 36 V. Components with reasonable parameters are set to make the system performance more stable and the control more reliable.

[0014] Preferably, the switch module includes a third resistor, a fourth resistor, a relay, a diode and a second triode, the second triode is an NPN type, the power module has a first output voltage and a second output voltage, the relay has at least one pair of normally open contacts, the output pin of the main control module is electrically connected to one end of the third resistor, the other end of the third resistor is electrically connected to the base of the second triode and one end of the fourth resistor respectively, the emitter of the second triode is electrically connected to the other end of the fourth resistor and is grounded, the collector of the second triode is electrically connected to the anode of the diode and one end of the control coil of the relay respectively, the cathode of the diode and the other end of the control coil of the relay are both electrically connected to the positive electrode of the first output voltage of the power module, and a pair of normally open contacts of the relay are electrically connected to the positive electrode of the second output voltage of the power module and the second electrode sheet respectively. The switch module requires few parts, has a simple circuit structure, low cost and high reliability.

[0015] Preferably, the circuit structure further comprises a pluggable second terminal, and the first electrode sheet and the second electrode sheet are electrically connected to the negative electrode of the power module and the corresponding end of the normally open contact of the relay through the second terminal. This arrangement uses a pluggable terminal to connect the rivet head structure and the circuit structure, which is more convenient to use and install.

[0016] Preferably, the resistance of the third resistor is 10K, the resistance of the fourth resistor is 10K, the first output voltage of the power module is 5V, and the second output voltage of the power module is 36V. Components with reasonable parameters are set to make system performance more stable and control more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a rivet head structure of a hot riveting heating device of an existing binding machine;

[0018] Figure 2 A schematic diagram of the circuit structure of a hot riveting heating device of an existing binding machine;

[0019] Figure 3A schematic diagram of the rivet head structure of the hot riveting heating device of the binding machine in Example 1 and Example 2;

[0020] Figure 4 A schematic diagram of the circuit structure of the hot riveting heating device of the binding machine in Example 1;

[0021] Figure 5 A schematic diagram of the circuit structure of the hot riveting heating device of the binding machine in Example 2;

[0022] In the prior art figure: 1a-rivet head cover, 2a-rivet head, 3a-insulating gasket, 4a-first electrode sheet, 5a-heating sheet, 6a-second electrode sheet, 7a-rivet head seat, 8a-main control module, 9a-power module, 10a-switch module, 11a-input end of the switch module, 12a-output end of the switch module, 13a-control end of the switch module, HEAT'-output pin of the main control module, R1'-first resistor, R2'-second resistor, T1'-NMOS tube;

[0023] In the figure of the utility model: 1- rivet head cover, 2- rivet head, 3- first electrode sheet, 4- heating sheet, 5- second electrode sheet, 6- rivet head seat, 7- main control module, 8- power module, 9- switch module, 10- input end of switch module, 11- output end of switch module, 12- control end of switch module, HEAT- output pin of main control module, R1- first resistor, R2- second resistor, T1- PMOS tube, Q1- first transistor, J1- first terminal, R3- third resistor, R4- fourth resistor, K1- relay, D1- diode, Q2- second transistor, J2- second terminal; DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Embodiment 1:

[0026] A hot riveting heating device for a binding machine comprises a rivet head structure and a circuit structure; Figure 3 As shown, the rivet head structure includes a rivet head cover 1, a rivet head 2, a first electrode sheet 3, a heating sheet 4, a second electrode sheet 5 and a rivet head seat 6. The rivet head cover 1 covers the rivet head seat 6 and forms an installation cavity inside. The rivet head 2, the first electrode sheet 3, the heating sheet 4, and the second electrode sheet 5 are sequentially installed in the installation cavity and are close to each other; Figure 4As shown, the circuit structure includes a main control module 7, a power module 8 and a switch module 9. The switch module 9 has an input terminal 10, an output terminal 11 and a control terminal 12. The control terminal 12 of the switch module 9 is electrically connected to the output pin HEAT of the main control module 7, the input terminal 10 of the switch module 9 is electrically connected to the positive electrode of the power module 8, the output terminal 11 of the switch module 9 is electrically connected to the second electrode sheet 5, the negative electrode of the power module 8 is electrically connected to the first electrode sheet 3, and the negative electrode of the power module 8 is grounded. When the main control module 7 controls its output pin HEAT to change, the switch module 9 turns on and off the positive electrode of the power module 8 and the second electrode sheet 5.

[0027] The switch module 9 includes a first resistor R1, a second resistor R2, a PMOS tube T1 and a first transistor Q1, the first transistor Q1 is of NPN type, the output pin HEAT of the main control module 7 is electrically connected to the base of the first transistor Q1, the emitter of the first transistor Q1 is grounded, the collector of the first transistor Q1 is electrically connected to one end of the first resistor R1, the other end of the first resistor R1 is electrically connected to the gate of the PMOS tube T1 and one end of the second resistor R2 respectively, the source of the PMOS tube T1 and the other end of the second resistor R2 are both electrically connected to the positive electrode of the power module 8, and the drain of the PMOS tube T1 is electrically connected to the second electrode sheet 5; the circuit structure also includes a pluggable first wiring terminal J1, the first electrode sheet 3 and the second electrode sheet 5 are electrically connected to the negative electrode of the power module 8 and the drain of the PMOS tube T1 respectively through the first wiring terminal J1.

[0028] In this embodiment, the resistance value of the first resistor R1 is 1K, the resistance value of the second resistor R2 is 10K, and the voltage of the power module 8 is 36V.

[0029] The working principle of the hot riveting heating device of the binding machine in this embodiment is as follows:

[0030] The first electrode sheet 3 is directly connected to the negative electrode of the power module 8, and the negative electrode of the power module 8 is grounded, that is, the first electrode sheet 3 is directly grounded; the second electrode sheet 5 is electrically connected to the positive electrode of the power module 8 through the switch module 9, and the main control module 7 controls the change of its output pin to control the on-off of the switch module 9, and then controls the on-off of the positive electrode of the power module 8 and the second electrode sheet 5; when the output pin HEAT of the main control module 7 is at a high level, the first transistor Q1 is turned on, and the 36V output voltage of the power module 8 is divided by the first resistor R1 and the second resistor R2, so that the gate voltage of the PMOS tube T1 is at least 6V lower than the source voltage, the PMOS tube T1 is turned on, and the positive electrode of the power module 8 is connected to the second electrode sheet 5 through the PMOS tube T1. At this time, the first electrode sheet 3 is also connected to the negative electrode of the power module 8, so the heating sheet 4 generates heat, and the heat generated by the heating sheet 4 is directly transferred to the rivet head 2, so as to achieve the effect of quickly heating the rivet head 2.

[0031] Embodiment 2:

[0032] A hot riveting heating device for a binding machine comprises a rivet head structure and a circuit structure; Figure 3 As shown, the rivet head structure includes a rivet head cover 1, a rivet head 2, a first electrode sheet 3, a heating sheet 4, a second electrode sheet 5 and a rivet head seat 6. The rivet head cover 1 covers the rivet head seat 6 and forms an installation cavity inside. The rivet head 2, the first electrode sheet 3, the heating sheet 4, and the second electrode sheet 5 are sequentially installed in the installation cavity and are close to each other; Figure 5 As shown, the circuit structure includes a main control module 7, a power module 8 and a switch module 9. The switch module 9 has an input terminal 10, an output terminal 11 and a control terminal 12. The control terminal 12 of the switch module 9 is electrically connected to the output pin HEAT of the main control module 7, the input terminal 10 of the switch module 9 is electrically connected to the positive electrode of the power module 8, the output terminal 11 of the switch module 9 is electrically connected to the second electrode sheet 5, the negative electrode of the power module 8 is electrically connected to the first electrode sheet 3, and the negative electrode of the power module 8 is grounded. When the main control module 7 controls its output pin HEAT to change, the switch module 9 turns on and off the positive electrode of the power module 8 and the second electrode sheet 5.

[0033] The switch module 9 includes a third resistor R3, a fourth resistor R4, a relay K1, a diode D1 and a second transistor Q2, the second transistor Q2 is an NPN type, the power module 8 has a first output voltage and a second output voltage, the relay K1 has at least one pair of normally open contacts K1A, the output pin HEAT of the main control module 7 is electrically connected to one end of the third resistor R3, the other end of the third resistor R3 is electrically connected to the base of the second transistor Q2 and one end of the fourth resistor R4, the emitter of the second transistor Q2 is electrically connected to the other end of the fourth resistor R4 and is grounded, and the collector of the second transistor Q2 is electrically connected to the base of the second transistor Q2. They are respectively electrically connected to the anode of the diode D1 and one end of the control coil K1B of the relay K1, the cathode of the diode D1 and the other end of the control coil K1B of the relay K1 are both electrically connected to the positive electrode of the first output voltage of the power module 8, and a pair of normally open contacts K1A of the relay K1 are respectively electrically connected to the positive electrode of the second output voltage of the power module 8 and the second electrode sheet 5; the circuit structure also includes a pluggable second terminal J2, and the first electrode sheet 3 and the second electrode sheet 5 are respectively electrically connected to the negative electrode of the power module 8 and the corresponding ends of the normally open contact K1A of the relay K1 through the second terminal J2.

[0034] In this embodiment, the resistance value of the third resistor R3 is 10K, the resistance value of the fourth resistor R4 is 10K, the first output voltage of the power module 8 is 5V, and the second output voltage of the power module 8 is 36V.

[0035] The working principle of the hot riveting heating device of the binding machine in this embodiment is as follows:

[0036] The first electrode sheet 3 is directly connected to the negative electrode of the power module 8, and the negative electrode of the power module 8 is grounded, that is, the first electrode sheet 3 is directly grounded; the second electrode sheet 5 is electrically connected to the positive electrode of the power module 8 through the switch module 9, and the main control module 7 controls the change of its output pin to control the on and off of the switch module 9, thereby controlling the on and off of the positive electrode of the power module 8 and the second electrode sheet 5; when the output pin HEAT of the main control module 7 is at a high level, the second transistor Q2 is turned on, and the first output voltage of the power module 8 is applied to the control coil K1B of the relay K1, the control coil K1B of the relay K1 is energized, and the normally open contact K1A of the relay K1 is closed, and the second output voltage of the power module 8 is connected to the second electrode sheet 5 through the closed normally open contact K1A. At this time, the first electrode sheet 3 is also connected to the negative electrode of the power module 8, so the heating sheet 4 generates heat, and the heat generated by the heating sheet 4 is directly transferred to the rivet head 2, thereby achieving the effect of quickly heating the rivet head 2.

Claims

1. A hot riveting heating device for a binding machine, comprising a riveting head structure and a circuit structure; characterized in that: The rivet head structure comprises a rivet head cover (1), a rivet head (2), a first electrode sheet (3), a heating sheet (4), a second electrode sheet (5) and a rivet head seat (6); the rivet head cover (1) covers the rivet head seat (6) and forms an installation cavity therein; the rivet head (2), the first electrode sheet (3), the heating sheet (4) and the second electrode sheet (5) are sequentially installed in the installation cavity and are closely attached to each other; the circuit structure comprises a main control module (7), a power supply module (8) and a switch module (9); the switch module (9) has an input end (10), an output end (11) and a control end (12); the switch The control end (12) of the switch module (9) is electrically connected to the output pin (HEAT) of the main control module (7); the input end (10) of the switch module (9) is electrically connected to the positive electrode of the power module (8); the output end (11) of the switch module (9) is electrically connected to the second electrode sheet (5); the negative electrode of the power module (8) is electrically connected to the first electrode sheet (3); the negative electrode of the power module (8) is grounded; and when the main control module (7) controls its output pin (HEAT) to change, the switch module (9) switches on and off the positive electrode of the power module (8) and the second electrode sheet (5).

2. The hot riveting heating device of a binding machine according to claim 1, characterized in that: The switch module (9) comprises a first resistor (R1), a second resistor (R2), a PMOS tube (T1) and a first triode (Q1); the first triode (Q1) is of NPN type; the output pin (HEAT) of the main control module (7) is electrically connected to the base of the first triode (Q1); the emitter of the first triode (Q1) is grounded; the collector of the first triode (Q1) is electrically connected to one end of the first resistor (R1); the other end of the first resistor (R1) is electrically connected to the gate of the PMOS tube (T1) and one end of the second resistor (R2) respectively; the source of the PMOS tube (T1) and the other end of the second resistor (R2) are both electrically connected to the positive electrode of the power module (8); and the drain of the PMOS tube (T1) is electrically connected to the second electrode sheet (5).

3. The hot riveting heating device of a binding machine according to claim 2, characterized in that: The circuit structure also includes a pluggable first wiring terminal (J1), and the first electrode sheet (3) and the second electrode sheet (5) are electrically connected to the negative electrode of the power module (8) and the drain electrode of the PMOS tube (T1) respectively through the first wiring terminal (J1).

4. The hot riveting heating device of a binding machine according to claim 2, characterized in that: The resistance value of the first resistor (R1) is 1K, the resistance value of the second resistor (R2) is 10K, and the voltage of the power module (8) is 36V.

5. The hot riveting heating device for a binding machine according to claim 1, characterized in that: The switch module (9) comprises a third resistor (R3), a fourth resistor (R4), a relay (K1), a diode (D1) and a second transistor (Q2), the second transistor (Q2) being of NPN type, the power module (8) having a first output voltage and a second output voltage, the relay (K1) having at least one pair of normally open contacts (K1A), an output pin (HEAT) of the main control module (7) being electrically connected to one end of the third resistor (R3), and the other end of the third resistor (R3) being electrically connected to the base of the second transistor (Q2) and one end of the fourth resistor (R4) respectively. The emitter of the second triode (Q2) is electrically connected to the other end of the fourth resistor (R4) and is grounded, the collector of the second triode (Q2) is electrically connected to the anode of the diode (D1) and one end of the control coil (K1B) of the relay (K1), the cathode of the diode (D1) and the other end of the control coil (K1B) of the relay (K1) are both electrically connected to the positive electrode of the first output voltage of the power module (8), and a pair of normally open contacts (K1A) of the relay (K1) are electrically connected to the positive electrode of the second output voltage of the power module (8) and the second electrode sheet (5), respectively.

6. The hot riveting heating device for a binding machine according to claim 5, characterized in that: The circuit structure also includes a pluggable second wiring terminal (J2), and the first electrode sheet (3) and the second electrode sheet (5) are electrically connected to the negative pole of the power module (8) and the corresponding end of the normally open contact (K1A) of the relay (K1) through the second wiring terminal (J2).

7. The hot riveting heating device for a binding machine according to claim 5, characterized in that: The resistance value of the third resistor (R3) is 10K, the resistance value of the fourth resistor (R4) is 10K, the first output voltage of the power module (8) is 5V, and the second output voltage of the power module (8) is 36V.

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