Electronic pen with replaceable battery module

Abstract

The utility model discloses an electronic pen with a replaceable battery module. The electronic pen with the replaceable battery module comprises a pen body and the battery module. The battery module comprises a first connector, a battery and a charging circuit; the pen main body comprises a second connector; the input end of the charging circuit is electrically connected with the charging end of the first connector; the output end of the charging circuit is electrically connected with the input end of the battery; the output end of the battery is electrically connected with the input end of the first connector; the second connector is detachably and electrically connected with the output end of the first connector. The battery module is detachably and electrically connected with a second connector contained in the pen main body through a first connector contained in the battery module, so that the replaceability of the battery module in the electronic pen is realized; according to the electronic pen, the battery is charged through the first connector and the charging circuit in the battery module, so that repeated utilization of the battery module is realized, the binding property of using the electronic pen by a user is reduced, the service life of the battery is prolonged, and the loss of a main body part of the electronic pen is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic touch input device technical field especially relates to a kind of electronic pen of replaceable battery module. BACKGROUND

[0002] Electronic pen is widely applied to computer screen, mobile device or drawing board etc. with display screen as a kind of writing and drawing tool. The use of electronic pen usually needs to be powered by battery, and the existing electronic pen in the market needs to be charged by user for the battery used for power supply after a period of use, that is, the remaining power is reduced to a certain extent, which has strong constraint. And since the battery in the existing electronic pen in the market cannot be replaced, when the battery in the electronic pen reaches its corresponding service life, the electronic pen also enters the scrap stage, which causes great waste. SUMMARY

[0003] The utility model provides a kind of electronic pen of replaceable battery module, to realize that battery module in electronic pen can be replaced and charged, improve user experience, reduce the technical effect of electronic pen constraint.

[0004] To solve the above technical problems, the utility model embodiment provides a kind of electronic pen of replaceable battery module, including pen main body and battery module;Wherein:

[0005] The battery module includes first connector, battery and charging circuit;The pen main body includes second connector;

[0006] The charging end of the first connector is electrically connected with the first input end of the charging circuit;

[0007] The charging end of the first connector is electrically connected with the second input end of the charging circuit;

[0008] The output end of the charging circuit is electrically connected with the input end of the battery;

[0009] The output end of the battery is electrically connected with the input end of the first connector;

[0010] The output end of the first connector is detachably electrically connected with the second connector.

[0011] The electronic pen provided by the utility model includes a pen main body and a battery module, the battery module is detachably electrically connected with a second connector contained in the pen main body through a first connector contained in the battery module, so that the replaceability of the battery module in the electronic pen is realized, when the power of the battery module in the electronic pen cannot meet the requirement of a user and cannot continue to support the use of the electronic pen, the user can replace the battery module in the electronic pen, so that the continuous power supply requirement of the electronic pen is realized, and the sudden power failure of the battery in the electronic pen affecting the use experience of the user is avoided.

[0012] Meanwhile, since the replaced battery module also contains a charging circuit, after the battery module that cannot continue to realize the power supply function is replaced, the user can also charge the battery through the first connector and the charging circuit in the battery module, so that the reuse of the battery module is realized, the constraint of the user using the electronic pen is also reduced, the service life of the battery is also improved, and the unnecessary loss of the electronic pen main body component is avoided.

[0013] As a preferred example, the first connector includes a connector chip, a voltage division module and a power supply interface; wherein:

[0014] The fifth pin of the connector chip is used as a charging end of the first connector;

[0015] The fifth pin of the connector chip is electrically connected with a first input end of the charging circuit;

[0016] The fifth pin of the connector chip is electrically connected with a second input end of the charging circuit;

[0017] The fifth pin of the connector chip is electrically connected with the power supply interface;

[0018] The third pin of the connector chip is used as an output end of the first connector;

[0019] The third pin of the connector chip is detachably electrically connected with the second connector;

[0020] The input end of the voltage division module is used as an input end of the first connector;

[0021] The input end of the voltage division module is electrically connected with an output end of the battery;

[0022] The fourth pin of the connector chip is grounded;

[0023] The sixth pin of the connector chip is grounded;

[0024] The third pin of the connector chip is electrically connected with an output end of the voltage division module.

[0025] The first connector provided by the utility model includes a connector chip, a voltage division module and a power supply interface, the electronic pen can control the on-off state of the voltage division module to control the power supply state of the battery module to the pen main body, so as to flexibly adjust the power supply state of the electronic pen, if it is needed to close the power supply of the battery module to the pen main body, the user can adjust the voltage division module to the off state, so that the output end of the battery cannot realize the electrical connection relationship with the power supply end of the first connector, so as to realize the adjustment of the battery module power supply function in the electronic pen, the user can timely adjust the electrical connection relationship between the battery module and the electronic pen when not needing to use the electronic pen, the service life of the battery module is improved, and the power consumption of the battery module is saved.

[0026] As a preferred example, the voltage division module includes a first transistor, a first adjustable resistor, a second adjustable resistor and a power supply interface; wherein:

[0027] The source of the first transistor is used as the input end of the voltage division module;

[0028] The source of the first transistor is electrically connected with the output end of the battery;

[0029] The drain of the first transistor is used as the output end of the voltage division module;

[0030] The drain of the first transistor is electrically connected with the third pin of the connector chip;

[0031] The third pin of the connector chip is electrically connected with the drain of the first transistor;

[0032] The gate of the first transistor is electrically connected with the first end of the first adjustable resistor;

[0033] The gate of the first transistor is electrically connected with the first end of the second adjustable resistor;

[0034] The second end of the first adjustable resistor is grounded;

[0035] The second end of the second adjustable resistor is electrically connected with the power supply interface.

[0036] The voltage division module provided by the utility model is composed of a first transistor, a first adjustable resistor and a second adjustable resistor and a power supply interface, by adjusting the resistance value of the first adjustable resistor and the second adjustable resistor, the on-off state of the first transistor can be adjusted, and by adjusting the on-off state of the first transistor, the on-off state of the voltage division module can be adjusted, so that by adjusting the resistance value of the first adjustable resistor and the second adjustable resistor, the on-off state of the voltage division module can be adjusted, that is, the power supply state of the battery module can be adjusted.

[0037] As a preferred example, the first connector comprises a connector chip, a first resistor, a second resistor and a power interface; wherein:

[0038] The fifth pin of the connector chip is a charging end of the first connector;

[0039] The fifth pin of the connector chip is electrically connected with a first input end of the charging circuit;

[0040] The fifth pin of the connector chip is electrically connected with a second input end of the charging circuit;

[0041] The fifth pin of the connector chip is electrically connected with the power interface;

[0042] The third pin of the connector chip is an output end of the first connector;

[0043] The third pin of the connector chip is detachably electrically connected with the second connector;

[0044] The second end of the first resistor is an input end of the first connector;

[0045] The second end of the first resistor is electrically connected with an output end of the battery;

[0046] The sixth pin of the connector chip is grounded;

[0047] The third pin of the connector chip is electrically connected with the first end of the first resistor;

[0048] The fourth pin of the connector chip is electrically connected with the first end of the second resistor;

[0049] The second end of the first resistor is electrically connected with an output end of the battery;

[0050] The second end of the second resistor is grounded.

[0051] The utility model also provides another example of first connector, the first connector provided by this example only comprises connector chip, first resistor and second resistor, through the first connector provided by this example can realize that the battery in the battery module of electronic pen is charged, and the battery module can also normally power supply for electronic pen, realize the synchronization of two states. Through the first connector of two different combinations above, the user can select the corresponding combination of the first connector as the combination module of the battery module according to actual demand, expands the selection range of user.

[0052] As a preferred example, the charging circuit comprises a charging chip, a first LED lamp, a second LED lamp, a first capacitor, a second capacitor, a third resistor, a fourth resistor and a third adjustable resistor; wherein:

[0053] the positive pole of the first LED lamp as a second input terminal of the charging circuit;

[0054] the positive pole of the first LED lamp is electrically connected with the charging terminal of the first connector;

[0055] the positive pole of the second LED lamp as a second input terminal of the charging circuit;

[0056] the positive pole of the second LED lamp is electrically connected with the charging terminal of the first connector;

[0057] the fourth pin of the charging chip as a first input terminal of the charging circuit;

[0058] the fourth pin of the charging chip is electrically connected with the charging terminal of the first connector;

[0059] the third pin of the charging circuit as an output terminal of the charging circuit;

[0060] the third pin of the charging circuit is electrically connected with the input terminal of the battery;

[0061] the first pin of the charging chip is electrically connected with the first end of the fourth resistor;

[0062] the second end of the fourth resistor is electrically connected with the negative pole of the first LED lamp;

[0063] the second pin of the charging chip is grounded;

[0064] the third pin of the charging chip is grounded through the first capacitor;

[0065] the fourth pin of the charging chip is grounded through the second capacitor;

[0066] the fifth pin of the charging chip is electrically connected with the first end of the third resistor;

[0067] the second end of the third resistor is electrically connected with the negative pole of the second LED lamp;

[0068] the sixth pin of the charging chip is grounded through the third adjustable resistor.

[0069] The charging circuit provided by the utility model includes a charging chip, two LED lamps, two capacitors, two resistors and an adjustable resistor, the two LED lamps are electrically connected to the first pin and the fifth pin of the charging chip, and the charging state of the battery can be prompted.

[0070] The sixth pin of the charging chip is used for setting, monitoring and stopping the charging current, and the resistance value of the third adjustable resistor electrically connected to the sixth pin can be adjusted to control the charging current, thereby controlling the charging time and the charging efficiency of the battery.

[0071] As a preferred example, the battery module further comprises a battery protection circuit, wherein:

[0072] The input end of the battery protection circuit is electrically connected to the output end of the charging circuit.

[0073] The output end of the battery protection circuit is electrically connected to the battery.

[0074] The battery module further comprises a battery protection circuit, which is used for protecting the battery and mainly comprises overvoltage protection and overcurrent protection. The battery protection circuit is electrically connected between the charging circuit and the battery, and is used for protecting the battery from overvoltage and overcurrent when the charging circuit charges the battery, thereby prolonging the service life of the battery in the battery module and improving the environmental protection, greenness and safety of the electronic pen.

[0075] As a preferred example, the battery protection circuit comprises a fifth resistor, wherein:

[0076] The first end of the fifth resistor is used as the input end of the battery protection circuit.

[0077] The first end of the fifth resistor is electrically connected to the output end of the charging circuit.

[0078] The second end of the fifth resistor is used as the output end of the battery protection circuit.

[0079] The second end of the fifth resistor is electrically connected to the input end of the battery.

[0080] The utility model also provides one of the examples of battery protection circuit, in the example, the battery protection circuit only contains the fifth resistance, adopts the example provided battery protection circuit then need not additional customization charging plug, can adopt common charging plug namely adapter, charges the battery module, reduces the electronic pen cost consumption of user.

[0081] As a preferred example, the first connector further comprises a control signal output end; the battery protection circuit comprises a charging protection chip, a first diode, a second diode, a third diode, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth resistor, a seventh resistor and an eighth resistor; wherein:

[0082] The first end of the sixth resistor is used as the battery protection circuit input end;

[0083] The first end of the sixth resistor is electrically connected with the output end of the charging circuit;

[0084] The second pin of the charging protection chip is used as the battery protection circuit output end;

[0085] The second pin of the charging protection chip is electrically connected with the battery;

[0086] The first end of the seventh resistor is used as the control signal input end;

[0087] The first end of the seventh resistor is electrically connected with the control signal output end;

[0088] The first end of the eighth resistor is used as the control signal input end;

[0089] The first end of the eighth resistor is electrically connected with the control signal output end;

[0090] The first pin of the charging protection chip is electrically connected with the second end of the sixth resistor;

[0091] The first pin of the charging protection chip is grounded through the first diode;

[0092] The first pin of the charging protection chip is electrically connected with the second pin of the charging protection chip through the third diode;

[0093] The first pin of the charging protection chip is electrically connected with the second pin of the charging protection chip through the third capacitor;

[0094] The second pin of the charging protection chip is grounded through the second diode;

[0095] The second pin of the charging protection chip is grounded through the fifth capacitor;

[0096] The third pin of the charging protection chip is electrically connected with the second end of the seventh resistor;

[0097] The third pin of the charging protection chip is grounded through the fourth capacitor;

[0098] The second end of the eighth resistor is grounded;

[0099] The fourth pin and the fifth pin of the charging protection chip are both grounded.

[0100] Another example of the battery protection circuit provided by the utility model includes a charging chip, three diodes, two capacitors and three resistors, two diodes of the three diodes are both ground diodes, which are used to connect the reference point and the ground together, ensure that each component in the circuit has reliable potential, help to reduce voltage instability in the circuit, and provide more reliable signal transmission. In addition, diode grounding can also be used to damp the high counter pressure of inductive load to protect the normal control circuit and power supply.

[0101] Meanwhile, the third pin of the charging protection chip is also electrically connected with the control signal input end of the battery protection circuit through the seventh resistor, and the control signal is input to the charging protection chip through the control signal input end, that is, the on-off state of the battery protection circuit is adjusted and controlled, so as to directly control the battery protection circuit, that is, the charging state of the battery is directly controlled by the control signal, the safety and service life of the battery are improved, and the user can flexibly adjust and control the charging state of the battery.

[0102] As a preferred example, the pen body further comprises a control mainboard, wherein:

[0103] The input end of the control mainboard is electrically connected with the output end of the second connector.

[0104] The pen body in the electronic pen provided by the utility model further comprises a control mainboard, which is used for collecting and sending various writing signals, receiving various signals obtained from the first connector by the second connector, and processing the signals, including an electric signal used for supplying power to the pen body.

[0105] As a preferred example, the pen body further comprises a power shortage warning module, the first connector further comprises a first detection signal output end, the control mainboard further comprises a second detection signal input end and a warning signal output end, and wherein:

[0106] The seventh pin of the first connector serves as the first detection signal output end;

[0107] The seventh pin of the first connector is electrically connected with the first detection signal input end of the second connector;

[0108] The seventh pin of the first connector is electrically connected with the battery;

[0109] The second detection signal output end of the second connector is electrically connected with the second detection signal input end;

[0110] The warning signal output end is electrically connected with the warning signal input end of the power shortage warning module.

[0111] The pen body further comprises a power shortage warning module, and after the control mainboard in the pen body receives the voltage detection signal sent by the second connector through the second detection signal output end, whether the battery in the battery module of the electronic pen needs to be charged is determined according to the real-time collected power of the battery module; if the power of the electronic pen needs to be charged, the warning signal is input into the power shortage warning module through the warning signal transmission line between the control mainboard and the power shortage warning module, so as to prompt the user that the electronic pen needs to be charged, so that the user can replace the battery module in the electronic pen in time or directly charge the battery module in the electronic pen, thereby avoiding the sudden power failure of the battery module in the electronic pen from affecting the user. BRIEF DESCRIPTION OF DRAWINGS

[0112] Figure 1 Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0113] Figure 2 Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0114] Figure 3 Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0115] Figure 4 Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0116] Figure 5 Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0117] Figure 6 Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0118] Figure 7 Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0119] Figure 8 Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0120] Fig. 1 is a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;Figure 9 : a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0121] Figure 10 : an appearance structure diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model;

[0122] Wherein, 10, battery module;101, battery;102, charging circuit;103, first connector;104, battery protection circuit;20, pen main body;201, second connector;202, control mainboard;203, power shortage warning module;901, first shell;902, first support;903, second shell. DETAILED DESCRIPTION

[0123] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0124] Embodiment one

[0125] Please refer to Figure 1 , a structural schematic diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model, including pen main body 20 and battery module 10;Wherein:

[0126] The battery module 10 includes a first connector 103, a battery 101 and a charging circuit 102;The pen main body 20 includes a second connector 201;

[0127] The charging end of the first connector 103 is electrically connected with the first input end of the charging circuit 102;

[0128] The charging end of the first connector 103 is electrically connected with the second input end of the charging circuit 102;

[0129] The output end of the charging circuit 102 is electrically connected with the input end of the battery 101;

[0130] The output end of the battery 101 is electrically connected with the input end of the first connector 103;

[0131] The output end of the first connector 103 is detachably electrically connected with the second connector 201.

[0132] The utility model discloses an electronic pen provided by the embodiment includes pen main part 20 and battery module 10, and the battery module 10 is detachable electric connection between the second connector 201 that it contains the first connector 103 with the pen main part 20 contains, to realize the replaceability of battery module 10 in electronic pen, when the battery module 10 in electronic pen has not satisfied the power requirement of user, cannot continue to support the use of electronic pen, and user can replace the battery module 10 in electronic pen, realize the continuous power supply demand of electronic pen, avoid the battery 101 power failure problem in electronic pen to influence the user's electronic pen use experience.

[0133] Meanwhile, since the replaced battery module 10 also includes charging circuit 102, after the user replaces the battery module 10 that cannot continue to realize the power supply function, the battery 101 can also be charged through the first connector 103 and charging circuit 102 in the battery module 10, so as to realize the reuse of the battery module 10, and also reduce the constraint of the user using the electronic pen, and improve the service life of the battery 101, and avoid the unnecessary loss of the electronic pen main body 20 component.

[0134] In the embodiment, as shown in Figure 1 When the user needs to power the pen main body 20 through the battery module 10, the first connector 103 and the second connector 201 are detachably electrically connected, so that the battery 101 current is transmitted to the pen main body 20 through the first connector 103 and the second connector 201 in turn, so as to realize the power supply of the pen main body 20. If the battery 101 in the battery module 10 is insufficient to support the power supply demand of the pen main body 20, the battery module 10 can be replaced by detaching the electrical connection and mechanical connection between the first connector 103 and the second connector 201.

[0135] Meanwhile, when the user needs to charge the battery 101 in the battery module 10 with insufficient power, the external power supply can be electrically connected with the first connector 103 of the battery module 10 to be charged, so that the charging current is transmitted to the battery 101 through the first connector 103 and the charging circuit 102 in turn, so as to realize the charging process of the battery 101 in the battery module 10 with insufficient power.

[0136] In summary, when the user needs to charge the battery 101, the charging current will be input into the battery 101 through the first connector 103 and the charging circuit 102 in turn, so as to realize the charging process of the battery 101; when the user needs to power the pen main body 20 through the battery 101, the power supply current will be input into the pen main body 20 through the battery 101, the first connector 103 and the second connector 201 in turn, so as to realize the power supply process of the pen main body 20.

[0137] Further, the battery module 10 described in the embodiment further comprises a battery protection circuit 104; wherein:

[0138] The input end of the battery protection circuit 104 is electrically connected with the output end of the charging circuit 102;

[0139] The output end of the battery protection circuit 104 is electrically connected with the battery 101.

[0140] The battery module 10 provided by the embodiment of the utility model further comprises a battery protection circuit 104, which is used for protecting the battery and mainly comprises overvoltage protection and overcurrent protection and the like. The battery protection circuit 104 is electrically connected between the charging circuit 102 and the battery 101, which is used for performing overvoltage protection and overcurrent protection on the battery 101 when the charging circuit 102 charges the battery 101, so as to improve the service life of the battery 101 in the battery module 10, and also improve the environmental protection, greenness and safety of the electronic pen.

[0141] Specifically, referring to Figure 2 , Figure 2 It is a basic hardware block diagram of one embodiment of the electronic pen with replaceable battery module provided by the utility model. As shown in Figure 2 , the battery 101 is electrically connected with the first connector 103 through the battery protection circuit 104 and the charging circuit 102, and the battery 101 is the battery described in the embodiment, the battery protection circuit 104 is the battery protection circuit described in the embodiment, and the first connector 103 is the first connector described in the embodiment.

[0142] As shown in Figure 2 , the pen body 20 comprises a second connector 201, a control mainboard 202 and a power failure warning module 203, wherein the pen body 20 is detachably electrically connected with the first connector 103 of the battery module 10 through the second connector 201, and the control mainboard 202 is electrically connected with the second connector 201 and also electrically connected with the power failure warning module 203.

[0143] When the user needs to charge the battery 101, the external power supply is electrically connected with Figure 2 the first connector 103, so that the charging current is transmitted from Figure 2 the first connector 103 to Figure 2 the battery protection circuit 104 and the charging circuit 102 in sequence and then to Figure 2 the battery 101, so as to charge the battery 101.

[0144] When the user needs to supply power to the pen body 20 through the battery 101, the power supply current will be transmitted from the battery 101 to Figure 3The battery protection circuit 104 and the power supply end of the first connector 103 provide power to the pen body 20, thereby completing the power supply process for the pen body 20. When the pen body 20 receives the power supply current transmitted by the battery module 10 through the first connector 103 via the second connector 201, it transmits the power supply current to the control motherboard 202, thereby completing the power supply process for the pen body 20.

[0145] Furthermore, the first connector of this embodiment includes a connector chip, a voltage divider module, and a power interface; wherein:

[0146] The fifth pin of the connector chip serves as the charging terminal of the first connector 103;

[0147] The fifth pin of the connector chip is electrically connected to the first input terminal of the charging circuit 102;

[0148] The fifth pin of the connector chip is electrically connected to the second input terminal of the charging circuit 102;

[0149] The fifth pin of the connector chip is electrically connected to the power interface;

[0150] The third pin of the connector chip serves as the output end of the first connector 103;

[0151] The third pin of the connector chip is detachably electrically connected to the second connector 201;

[0152] The input end of the voltage divider module serves as the input end of the first connector 103;

[0153] The input end of the voltage divider module is electrically connected to the output end of the battery;

[0154] The fourth pin of the connector chip is grounded;

[0155] The sixth pin of the connector chip is grounded;

[0156] The third pin of the connector chip is electrically connected to the output end of the voltage divider module.

[0157] In an embodiment of the present utility model, the first connector 103 provided by the system includes a connector chip, a voltage divider module and a power interface. The electronic pen can control the power supply status of the battery module 10 to the pen body 20 by controlling the on and off status of the voltage divider module, thereby realizing flexible adjustment of the power supply status of the electronic pen. If it is necessary to turn off the power supply of the battery module 10 to the pen body 20, the user can adjust the voltage divider module to the disconnected state, so that the output end of the battery 101 cannot be electrically connected to the power supply end of the first connector 103, thereby realizing adjustment of the power supply function of the battery module 10 in the electronic pen, making it convenient for the user to timely adjust the electrical connection relationship between the battery module 10 in the electronic pen and the electronic pen when the electronic pen is not in use, thereby improving the service life of the battery module 10 and saving the power consumption of the battery module 10.

[0158] For details, see Figure 3 , Figure 3 This is a circuit diagram of an embodiment of a first connector provided by the present utility model. Figure 3 As shown, Figure 3 The first connector 103 shown includes a connector chip, a voltage divider module and a power interface, wherein the connector chip is Figure 3 The J2 chip shown is the power interface. Figure 3 The fifth pin of the J2 chip is electrically connected to a 5V power supply interface, and the voltage divider module in this embodiment is Figure 3 The remaining components except J2 chip are shown in the figure. Figure 3 All components in the first connector 103 except the J2 chip constitute the voltage divider module described in this embodiment.

[0159] like Figure 3 As shown, the connector chip provided in this embodiment is Figure 3 The J2 chip shown has 8 pins in total, of which the eighth pin is a vacant pin and is not connected to any components. Figure 4 The connector chip J2 shown includes a first pin SH IPP I NG, which is a control signal output terminal, a second pin 5V, which is connected to an external constant voltage source, that is, electrically connected to the power interface described in this embodiment, a third pin CC1, which is electrically connected to a voltage divider module, and is the output terminal of the first connector 103 in this embodiment, a fifth pin 5V, which is connected to an external power interface, that is, the charging terminal of the first connector 103 in this embodiment, a sixth pin GND, which is grounded, a seventh pin VBAT+, which is the first detection signal output terminal in this embodiment, and is used to be electrically connected to the first detection signal input terminal of the second connector 201. At the same time, it is also electrically connected to the battery 101 to thereby detect the voltage of the battery 101. The ninth pin, the tenth pin and the fourth pin CC2 are all grounded.

[0160] The embodiment is not limited to the specific type of the connector, and the TYPE_C connector or a B2B connector or an aviation connector or other connectors can realize the embodiment, and a user can adjust according to an actual situation. Functions of the pins of the connector not only support power supply to the electronic pen, but also include charging of the battery 101, control of on-off switches of the charging circuit 102 and the like.

[0161] Further, the voltage division module comprises a first transistor, a first adjustable resistor, a second adjustable resistor and a power supply interface.

[0162] The source of the first transistor is used as an input end of the voltage division module.

[0163] The source of the first transistor is electrically connected with an output end of the battery 101.

[0164] The drain of the first transistor is used as an output end of the voltage division module.

[0165] The drain of the first transistor is electrically connected with a third pin of the connector chip.

[0166] The third pin of the connector chip is electrically connected with the drain of the first transistor.

[0167] The gate of the first transistor is electrically connected with a first end of the first adjustable resistor.

[0168] The gate of the first transistor is electrically connected with a first end of the second adjustable resistor.

[0169] A second end of the first adjustable resistor is grounded.

[0170] A second end of the second adjustable resistor is electrically connected with the power supply interface.

[0171] The voltage division module comprises the first transistor, the first adjustable resistor and the second adjustable resistor, and the power supply interface, and by adjusting resistance values of the first adjustable resistor and the second adjustable resistor, the on-off state of the first transistor can be adjusted, and by adjusting the on-off state of the first transistor, the on-off state of the voltage division module can be adjusted, so that by adjusting the resistance values of the first adjustable resistor and the second adjustable resistor, the on-off state of the voltage division module can be adjusted, that is, the power supply state of the battery module 10 can be adjusted.

[0172] The voltage division module comprises the first transistor Q2, the first adjustable resistor R300 and the second adjustable resistor R301, and Figure 4 The power supply interface electrically connected with the first end of the second adjustable resistor R301.

[0173] When the user needs to charge the battery 101, then access 5V adapter, that is, 5V external power supply, and when the second adjustable resistor R301 in the voltage dividing module accesses the 5V external voltage, the gate voltage VG of the first transistor Q2 is 4.5V, and the source output voltage VS of the first transistor is about 3.0V-4.4V, so the voltage drop between the gate and the source VGS' = VG-VS>0.7V can be calculated and determined, and then the first transistor will be adjusted to the off state, that is, VD=0, and the third pin CC1 of the connector chip serves as the output end of the first connector 103, and the output voltage is 0, that is, the battery module 10 will pause to supply power to the pen body 20, and the charging current of the external power supply input to the first connector 103 of the battery module 10 will directly flow into the battery 101 of the module, thereby achieving charging of the battery 101.

[0174] When the user needs to supply power to the pen body 20, the first end of the second adjustable resistor R301 in the voltage dividing module will not access the 5V external voltage source, the gate voltage VG of the corresponding first transistor Q2 is 0V, and the source output voltage VS of the first transistor is about 3.0V-4.4V, so the voltage drop between the gate and the source VGS = VG-VS<-0.7V can be calculated and determined, and then the first transistor will be adjusted to the closed state, that is, VD=VS, and the third pin CC1 of the connector chip serves as the output end of the first connector 103, and the output voltage is VS, that is, the battery module 10 will start to supply power to the pen body 20, and the power supply current of the battery 101 in the battery module 10 will sequentially pass through the battery protection circuit 104, the charging circuit 102 and the first connector 103 to input to the second connector 201 of the pen body 20, and then input to the control mainboard 202 by the second connector 201, thereby realizing the complete electronic pen power supply process.

[0175] Since the self-consumption power of the battery module 10 needs to be controlled within 3uA, the selection of the first transistor should meet the requirements of low internal resistance less than 50 milliohms and on-state current at least not less than 1A.

[0176] Further, referring to Figure 4 , the embodiment also provides another example of the first connector 103, Figure 4 a circuit diagram of another example of the first connector provided by the utility model. As Figure 3 shown, the first connector includes a connector chip, a first resistor, a second resistor and a power interface; wherein:

[0177] The fifth pin of the connector chip serves as the charging end of the first connector 103;

[0178] The fifth pin of the connector chip is electrically connected with the first input end of the charging circuit 102;

[0179] The fifth pin of the connector chip is electrically connected with a second input end of the charging circuit 102;

[0180] The fifth pin of the connector chip is electrically connected with the power interface;

[0181] The third pin of the connector chip is used as an output end of the first connector 103;

[0182] The third pin of the connector chip is detachably electrically connected with the second connector 201;

[0183] The second end of the first resistor is used as an input end of the first connector 103;

[0184] The second end of the first resistor is electrically connected with an output end of the battery 101;

[0185] The sixth pin of the connector chip is grounded;

[0186] The third pin of the connector chip is electrically connected with the first end of the first resistor;

[0187] The fourth pin of the connector chip is electrically connected with the first end of the second resistor;

[0188] The second end of the first resistor is electrically connected with the output end of the battery 101;

[0189] The second end of the second resistor is grounded.

[0190] The utility model also provides another example of the first connector, the first connector 103 provided by the example only includes a connector chip, a first resistor and a second resistor, the first connector 103 provided by the example can realize the charging of the battery 101 in the battery module 10 of the electronic pen, and the battery module 10 can also normally power the electronic pen, realizing the synchronization of two states. Through the first connector 103 of the above two different combinations, the user can select the corresponding combination of the first connector 103 as the combination module of the battery module 10 according to actual demand, which expands the selection range of the user.

[0191] In the example, the first connector 103 includes a connector chip J2, a first resistor R302 and a second resistor R303, which are combined as Figure 4 The first end of the first resistor R302 is electrically connected with the third pin CC1 of the connector chip J2, and the second end is electrically connected with the output end VBAT+ of the battery 101, and the first end of the second resistor R303 is electrically connected with the fourth pin CC2 of the connector chip J2, and the second end is grounded. In addition, the connector chip J2 provided by the example is electrically connected with the first resistor R302 and the second resistor R303 through the third pin CC1 and the fourth pin CC2, and the first resistor R302 and the second resistor R303 are electrically connected with the output end VBAT+ of the battery 101 through the second end and the second end respectively. Figure 4The functions of the pins of the connector chip J2 shown are the same.

[0192] When users need to Figure 8 When charging the battery 101 in the battery module 10 corresponding to the first connector 103 in the example, it is only necessary to electrically connect the external power supply to the power interface on the first connector 103. After the connection, the charging current can be input to the battery 101 through the charging circuit 102 and the battery protection circuit 104. At the same time, the power supply current of the battery 101 will also be synchronously output from the battery 101 to the first connector 103. Figure 8 With the first connector 103 shown, the system can realize simultaneous charging and power supply, that is, when the external power supply is charging the battery 101, the battery module 10 can also simultaneously supply power to the pen body 20.

[0193] As another example of this embodiment, see Figure 8 , Figure 3 A circuit diagram of another embodiment of a connector chip provided by the present invention, such as Figure 4 The pins of the connector chip J3 shown are Figure 5 and Figure 5 The connector chips J2 shown have the same functions, and the user can select any one of them as the connector chip in the first connector 103 of this embodiment according to actual needs.

[0194] Furthermore, the charging circuit of this embodiment includes a charging chip, a first LED lamp, a second LED lamp, a first capacitor, a second capacitor, a third resistor, a fourth resistor, and a third adjustable resistor; wherein:

[0195] The positive electrode of the first LED lamp serves as the second input terminal of the charging circuit 102;

[0196] The positive electrode of the first LED lamp is electrically connected to the charging end of the first connector 103;

[0197] The positive electrode of the second LED lamp serves as the second input terminal of the charging circuit 102;

[0198] The positive electrode of the second LED lamp is electrically connected to the charging end of the first connector 103;

[0199] The fourth pin of the charging chip serves as the first input terminal of the charging circuit 102;

[0200] The fourth pin of the charging chip is electrically connected to the charging end of the first connector 103;

[0201] The third pin of the charging circuit 102 serves as the output end of the charging circuit 102;

[0202] The third pin of the charging chip is electrically connected with the input end of the battery 101;

[0203] The first pin of the charging chip is electrically connected with the first end of the fourth resistor;

[0204] The second end of the fourth resistor is electrically connected with the negative pole of the first LED lamp;

[0205] The second pin of the charging chip is grounded;

[0206] The third pin of the charging chip is grounded through the first capacitor;

[0207] The fourth pin of the charging chip is grounded through the second capacitor;

[0208] The fifth pin of the charging chip is electrically connected with the first end of the third resistor;

[0209] The second end of the third resistor is electrically connected with the negative pole of the second LED lamp;

[0210] The sixth pin of the charging chip is grounded through the third adjustable resistor.

[0211] The charging circuit 102 provided by the embodiment of the utility model includes a charging chip, two LED lamps, and two capacitors, two resistors and an adjustable resistor, through the two LED lamps electrically connected on the first pin and the fifth pin of the charging chip, the prompting function of the battery 101 charging state can be realized. The first pin of the charging chip is used as the battery 101 charging state indicating end, when the battery 101 is in the charging state, the pin will be pulled to low level by the internal switch, therefore the first LED lamp electrically connected with it will be adjusted to the light state, correspondingly, when the battery 101 is in the full charging state, the fifth pin of the charging chip is used as the battery 101 charging completion indicating end, will be pulled to low level by the internal switch, then the second LED lamp corresponding to it will be adjusted to the light state.

[0212] The sixth pin of the charging chip is used as the pin of the charging chip for executing the charging current setting, the charging current monitoring and the shutdown, the resistance value of the third adjustable resistor electrically connected with it can be adjusted to realize the regulation and control of the charging current, and then the regulation and control of the battery 101 charging time and charging efficiency can be realized.

[0213] In the embodiment, referring to Figure 5 , Figure 5 The utility model provides a kind of circuit diagram of one embodiment of a kind of charging circuit. As shown in Figure 5 the circuit diagram, the charging circuit 102 provided by the present example includes the first LED lamp, i.e. Figure 5 LED, the second LED lamp, i.e. Figure 5The LED1 and the third resistor are shown Figure 5 The fourth resistor R304 is shown as Figure 5 The R305 shown is the third adjustable resistor. Figure 5 As shown in R306, the first capacitor is Figure 3 As shown in C104, the second capacitor is Figure 3 The three resistors in the charging chip 102, namely the third resistor R304, the fourth resistor R305 and the third adjustable resistor R306, are all adjustable resistors, and the user can adjust their resistance values ​​according to actual needs.

[0214] The six pins of the charging chip U101 are respectively a first pin CHRG, a second pin GND, a third pin BAT, a fourth pin VCC, a fifth pin STDBY and a sixth pin PROG.

[0215] Depend on Figure 5 It can be seen that the first pin CHRG is connected to the charging end of the first connector 103 through the fourth resistor R305 and the first LED lamp LED in sequence, that is, the second input end of the charging circuit 102 in this embodiment. The first pin CHRG is the battery charging indication end of the charging chip U101.

[0216] The second pin GND is grounded and is the ground terminal of the charging chip U101.

[0217] The third pin BAT is grounded via the first capacitor C104 and is also electrically connected to the battery protection circuit 104 as the output end of the charging circuit 102 , serving as the battery end of the charging chip U101 .

[0218] The fourth pin VCC is grounded through the second capacitor C103 and is also electrically connected to the charging end of the first connector 103 as the first input end of the charging circuit 102 , serving as the power supply end of the charging chip U101 and providing a voltage source to the charging chip U101 .

[0219] The fifth pin STDBY is electrically connected to the charging end of the first connector 103 through the third resistor R304 and the second LED lamp LED1 in sequence. The positive electrode of the second LED lamp LED1 is the second input end of the charging circuit 102 described in this embodiment. The fifth pin STDBY is the battery charging completion indication end of the charging chip U101.

[0220] The sixth pin PROG is grounded through the third adjustable resistor R306 to set the programmable constant current charging current section of the charging chip U101, the third adjustable resistor R306 is a pull-down resistor of the charging chip U101, the value of the third adjustable resistor R306 can control the value of the charging current, and the interference current in the absorption circuit can resist the interference generated by the circuit electric signal transmission, and the voltage is pulled down, so that the input voltage meets the charging requirements of the lithium battery of the utility model. The resistance value of the pull-down resistor R306 of the charging chip U101 of the common small capacity lithium battery is preferably 12.5kΩ.

[0221] In summary, Figure 4 The first LED lamp LED and the second LED lamp LED1 in the charging circuit 102 shown are components for indicating the charging state provided in the embodiment, when the battery is in the charging state, the charging chip Figure 6 The first pin CHRG of the power management chip U101 shown controls the first LED lamp LED connected thereto to light, indicating that the battery is being charged; when the battery is fully charged, the charging chip Figure 6 The fifth pin STDBY of the power management chip U101 shown controls the second LED lamp LED1 connected thereto to light, indicating that the battery is fully charged. Through the above-mentioned component combination, the current charging state of the battery can be monitored in real time, so that the user can stop the charging of the battery module 10 in time, and unnecessary consumption of charging time is avoided.

[0222] Further, the first connector provided by the battery module 10 further comprises a control signal output end; the battery protection circuit comprises a charging protection chip, a first diode, a second diode, a third diode, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth resistor, a seventh resistor and an eighth resistor; wherein:

[0223] The first end of the sixth resistor is used as the input end of the battery protection circuit 104;

[0224] The first end of the sixth resistor is electrically connected to the output end of the charging circuit 102;

[0225] The second pin of the charging protection chip is used as the output end of the battery protection circuit 104;

[0226] The second pin of the charging protection chip is electrically connected to the battery;

[0227] The first end of the seventh resistor is used as the control signal input end;

[0228] The first end of the seventh resistor is electrically connected to the control signal output end;

[0229] The first end of the eighth resistor is connected to the control signal input end;

[0230] The first end of the eighth resistor is connected to the control signal output end;

[0231] The first pin of the charging protection chip is connected to the second end of the sixth resistor;

[0232] The first pin of the charging protection chip is grounded through the first diode;

[0233] The first pin of the charging protection chip is connected to the second pin of the charging protection chip through the third diode;

[0234] The first pin of the charging protection chip is connected to the second pin of the charging protection chip through the third capacitor;

[0235] The second pin of the charging protection chip is grounded through the second diode;

[0236] The second pin of the charging protection chip is grounded through the fifth capacitor;

[0237] The third pin of the charging protection chip is connected to the second end of the seventh resistor;

[0238] The third pin of the charging protection chip is grounded through the fourth capacitor;

[0239] The second end of the eighth resistor is grounded;

[0240] The fourth pin and the fifth pin of the charging protection chip are both grounded.

[0241] Another example of the battery protection circuit provided by the utility model includes a charging chip, three diodes, two capacitors and three resistors. Two of the three diodes are both grounded diodes, which are used to connect the reference point and the ground together and ensure that each component in the circuit has a reliable potential, which helps to reduce voltage instability in the circuit and provide more reliable signal transmission. In addition, diode grounding can also be used to damp the high counter-pressure of inductive load to protect the normal control circuit and power supply.

[0242] Meanwhile, the third pin of the charging protection chip is also electrically connected with the control signal input end of the battery protection circuit 104 through the seventh resistor, and a control signal is input to the charging protection chip through the control signal input end, that is, the on-off state of the battery protection circuit 104 is regulated and controlled, so as to realize the direct control of the battery protection circuit 104, that is, the charging state of the battery 101 is directly controlled by the control signal, the safety and service life of the battery are improved, the user can flexibly regulate and control the charging state of the battery, and the environmental protection, greenness and safety of the electronic pen are also improved.

[0243] In the battery module 10 structure scheme provided in the embodiment, an embodiment is provided for the battery protection circuit 104, and specific reference can be made to Figure 6 , Figure 6 The utility model provides a kind of circuit diagram of the circuit of one embodiment of battery protection circuit. As shown in Figure 6 The battery protection circuit 104 includes sixth resistor R100, seventh resistor R101, eighth resistor R102, third capacitor C100, fourth capacitor C101, fifth capacitor C102, first diode D100, second diode D101, third diode D102 and charging protection chip, i.e. Figure 4 TVS diode, i.e. transient voltage suppression diode, also known as avalanche breakdown diode, is used to protect sensitive circuit from high voltage transient damage component, and its main function is to protect the battery 101 connected to the rear stage of the battery protection circuit 104 from damage caused by voltage impact of port transient.

[0244] The charging protection chip, i.e. Figure 6 The constant current drive chip U100 includes first pin VDD, second pin GND, third pin SM, fourth pin VM and fifth pin EPAD.

[0245] As Figure 6 Known, the first pin VDD is electrically connected with the output end of the battery protection circuit 104, i.e. Figure 6 TP100 corresponds to VBAT+ shown in the figure, and is also grounded through the second diode D101. The output end VBAT+ of the charging circuit 102 is also electrically connected with the first end of the sixth resistor electrically connected with the first pin VDD.

[0246] The second pin GND is the output end of the battery protection circuit 104, i.e. Figure 6The TP101 corresponds to the VBAT- electric connection, and is grounded through the third diode D102, and is grounded through the fifth capacitor C102. The first pin VDD is connected with the second pin GND, and the output end VBAT- of the charging circuit 102 is electrically connected with the second pin GND.

[0247] The third pin SM is connected with the control signal input end through the seventh resistor R101, and is grounded through the eighth resistor R102. Figure 6 The SHIPPING end is electrically connected, and is grounded through the eighth resistor R102 and the fourth capacitor C101.

[0248] The fourth pin VM and the fifth pin EPAD are grounded. As shown in the figure, Figure 6 The battery protection circuit 104 provided by the embodiment is adjusted to the on state when the third pin SM of the battery protection circuit 104 receives the SHIPPING signal input by the first connector 103 through the control signal input end, Figure 6 The second pin GND and the fifth pin EPAD of the constant current driving chip U100, that is, the charging protection chip, are adjusted to the on state, that is, Figure 7 VBAT- and GND are turned on, so that the battery 101 can be charged, otherwise VBAT- and GND are in the off state, so that the battery 101 cannot be charged. In this way, the on-off state of the battery protection circuit 104 is adjusted by an external signal, and the overvoltage protection and overcurrent protection functions of the battery 101 are realized. When the SHIPPING signal in the circuit is high and lasts for 200ms, the circuit enters the off state and cannot charge the battery 101; when the SHIPPING signal is pulled low, the circuit is in the on state and can charge the battery 101.

[0249] In the embodiment, when the battery protection circuit 104 as shown in the figure is used, Figure 7 The charging seat of the corresponding type needs to be customized, so that the customized charging seat can be activated by the SHIPPING signal.

[0250] Correspondingly, the embodiment also provides another example of a battery protection circuit, which is shown in the figure, Figure 7 , Figure 7 is a circuit diagram of another example of the battery protection circuit provided by the utility model. If the battery protection circuit 104 as shown in the figure is used, Figure 7 The charging seat does not need to be customized, Figure 7 is a circuit diagram of another example of the battery protection circuit provided by the utility model. If the battery protection circuit 104 as shown in the figure is used, Figure 7As shown, the battery protection circuit 104 includes a fifth resistor R307, one end of which is electrically connected to the output end of the battery protection circuit 104 of the embodiment, i.e. Figure 2 VBAT- is electrically connected, and the other end is grounded. As shown in the figure, the battery protection chip is used to charge the battery 101 through a commonly used configuration device. Figure 2 The battery protection chip does not need to be customized with a charging seat and a plug. The circuit is used to charge the battery 101 through a commonly used configuration device.

[0251] Another example of the battery protection circuit 104 provided by the utility model is provided. In the example, the battery protection circuit 104 only includes a fifth resistor. The battery protection circuit 104 provided by the example does not need to be additionally customized with a charging plug. A commonly used charging plug, i.e. an adapter, can be used to charge the battery module 10, thereby reducing the cost consumption of the electronic pen of the user.

[0252] In order to better illustrate the working principle and step flow of the electronic pen with a replaceable battery module, reference can be made to the related description in the foregoing text, but is not limited thereto.

[0253] Correspondingly, reference can be made to Figure 2 , Figure 3 A basic hardware block diagram of an embodiment of the electronic pen with a replaceable battery module provided by the utility model is provided. As shown in the figure, Figure 10 The pen main body 20 of the electronic pen with a replaceable battery module 10 provided by the embodiment further includes a control mainboard 202. Wherein:

[0254] The input end of the control mainboard 202 is electrically connected to the output end of the second connector 201.

[0255] The pen main body 20 in the electronic pen provided by the utility model further includes a control mainboard 202. The control mainboard 202 is used to collect and send various writing signals, and receive various signals obtained from the first connector 103 by the second connector 201, and process the signals, including an electric signal used to supply power to the pen main body 20.

[0256] Specifically, the pen main body 20 of the embodiment further includes a power shortage warning module 203; the first connector 103 further includes a first detection signal output end; the control mainboard 202 further includes a second detection signal input end and a warning signal output end; wherein:

[0257] The seventh pin of the first connector 103 serves as the first detection signal output end;

[0258] The seventh pin of the first connector 103 is electrically connected to the first detection signal input end of the second connector 201;

[0259] The seventh pin of the first connector 103 is electrically connected to the battery.

[0260] The second detection signal output terminal of the second connector 201 is electrically connected to the second detection signal input terminal;

[0261] The warning signal output terminal is electrically connected to the warning signal input terminal of the power shortage warning module.

[0262] The pen body 20 provided by the present invention also includes a power shortage warning module. After receiving the voltage detection signal sent by the second connector 201 through the second detection signal output terminal, the control mainboard 202 in the pen body 20 will determine whether the battery 101 in the battery module 10 of the electronic pen needs to be charged based on the power level of the battery module 10 collected in real time. If it is determined that the power level of the electronic pen needs to be charged, the warning signal is input to the power shortage warning module via the warning signal transmission line between the control mainboard 202 and the power shortage warning module, thereby notifying the user that the electronic pen needs to be charged, so that the user can replace the battery module 10 in the electronic pen in time or directly charge the battery module 10 in the electronic pen to avoid adverse effects on the user caused by sudden power failure of the battery module 10 of the electronic pen.

[0263] In this embodiment, if Figure 10 、 4 As shown in FIG8 , the seventh pin of the connector chip J2 and the ninth pin of J3 are both first detection signal output terminals of the first connector 103, which are electrically connected to the first detection signal input terminal of the second connector 201 for transmitting a voltage detection signal; and are also electrically connected to the battery 101 for detecting the battery voltage and generating a voltage detection signal.

[0264] The present invention can provide a battery charging warning module 203 on the pen body 20 to warn the user of the battery 101 voltage status, prompting the user to replace the battery module 10 or charge the electronic pen in time, thereby avoiding adverse effects on the user caused by sudden power failure of the battery module 10 of the electronic pen.

[0265] To ensure that the user's normal use of the electronic pen is not affected by a sudden power outage of the electronic pen's battery module 10, the electronic pen provided by the utility model is also provided with a power-off warning module 203. This module detects the voltage of the electronic pen in real time, and determines whether the electronic pen needs to be charged or the battery module 10 needs to be replaced based on the real-time voltage detected. The module also determines whether the user needs to be prompted to charge the electronic pen based on the judgment result.

[0266] In addition, see Figure 10 , Figure 9 This is an appearance diagram of an embodiment of an electronic pen with a replaceable battery module provided by the present invention, as shown in FIG.Figure 9 The electronic pen provided by the embodiment of the utility model includes a battery module 10 and a pen main body 20.

[0267] Specifically, referring to Figure 9 , Figure 9 The utility model provides an embodiment structure schematic drawing of electronic pen of replaceable battery module, as shown in the figure. ​ The electronic pen provided by the embodiment of the utility model includes a pen main body 20 and a battery module 10, wherein the pen main body 20 further includes a first shell 901, a first support 902 and a control mainboard 202, and the battery module 10 includes a first connector 103 and a second shell 903.

[0268] As shown in the figure, the first support 902 can fix the battery module 10, that is, fix the battery module 10 on the pen main body 20, thereby improving the connection stability between the battery module 10 and the pen main body 20. ​ The battery shell not only exists in the pen main body 20, but also is arranged on the battery module 10; the first shell 901 arranged on the pen main body 20 and the second shell 903 arranged on the battery module 10 can mutually cooperate to fix the battery module 10, thereby improving the stability of the battery module 10 on the electronic pen, avoiding the situation that the unstable fixation leads to the voltage detection error of the electronic pen, thereby affecting the user to use the electronic pen and reducing the user experience.

[0269] In summary, the utility model provides an electronic pen with replaceable battery module, which includes a pen main body 20 and a battery module 10; the battery module 10 includes a first connector 103, a battery 101 and a charging circuit 102; the pen main body 20 includes a second connector 201; the input end of the charging circuit 102 is electrically connected with the charging end of the first connector 103; the output end of the charging circuit 102 is electrically connected with the input end of the battery 101; the output end of the battery 101 is electrically connected with the input end of the first connector 103; the second connector 201 is detachably electrically connected with the output end of the first connector 103. The battery module 10 is detachably electrically connected with the second connector 201 included in the pen main body 20 through the first connector 103 included in the battery module 10, so as to realize the replaceability of the battery module 10 in the electronic pen; the battery 101 is charged through the first connector 103 and the charging circuit 102 in the battery module 10, so as to realize the repeated use of the battery module 10, reduce the constraint of the user to use the electronic pen, improve the service life of the battery and avoid the unnecessary loss of the components of the pen main body 20.

[0270] The above-described specific embodiments have further detailed the purposes, technical solutions and beneficial effects of the present application, and it should be understood that the above-described is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. It is particularly pointed out that, for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electronic pen with a replaceable battery module, characterized in that: It includes a pen body and a battery module; wherein: The battery module includes a first connector, a battery and a charging circuit; the pen body includes a second connector; The charging end of the first connector is electrically connected to the first input end of the charging circuit; The charging end of the first connector is electrically connected to the second input end of the charging circuit; The output end of the charging circuit is electrically connected to the input end of the battery; The output end of the battery is electrically connected to the input end of the first connector; The output end of the first connector is detachably electrically connected to the second connector.

2. The electronic pen with a replaceable battery module according to claim 1, wherein: The first connector includes a connector chip, a voltage divider module and a power interface; wherein: The fifth pin of the connector chip serves as a charging terminal of the first connector; The fifth pin of the connector chip is electrically connected to the first input terminal of the charging circuit; The fifth pin of the connector chip is electrically connected to the second input terminal of the charging circuit; The fifth pin of the connector chip is electrically connected to the power interface; The third pin of the connector chip serves as the output end of the first connector; The third pin of the connector chip is detachably electrically connected to the second connector; The input end of the voltage divider module serves as the input end of the first connector; The input end of the voltage divider module is electrically connected to the output end of the battery; The fourth pin of the connector chip is grounded; The sixth pin of the connector chip is grounded; The third pin of the connector chip is electrically connected to the output end of the voltage divider module.

3. The electronic pen with a replaceable battery module according to claim 2, wherein: The voltage divider module includes a first transistor, a first adjustable resistor, a second adjustable resistor and a power supply interface; wherein: The source of the first transistor serves as the input end of the voltage divider module; The source of the first transistor is electrically connected to the output terminal of the battery; The drain of the first transistor serves as the output end of the voltage divider module; The drain of the first transistor is electrically connected to the third pin of the connector chip; The third pin of the connector chip is electrically connected to the drain of the first transistor; The gate of the first transistor is electrically connected to the first end of the first adjustable resistor; The gate of the first transistor is electrically connected to the first end of the second adjustable resistor; The second end of the first adjustable resistor is grounded; The second end of the second adjustable resistor is electrically connected to the power interface.

4. The electronic pen with a replaceable battery module according to claim 1, wherein: The first connector includes a connector chip, a first resistor, a second resistor and a power interface; wherein: The fifth pin of the connector chip serves as a charging terminal of the first connector; The fifth pin of the connector chip is electrically connected to the first input terminal of the charging circuit; The fifth pin of the connector chip is electrically connected to the second input terminal of the charging circuit; The fifth pin of the connector chip is electrically connected to the power interface; The third pin of the connector chip serves as the output end of the first connector; The third pin of the connector chip is detachably electrically connected to the second connector; The second end of the first resistor serves as an input end of the first connector; The second end of the first resistor is electrically connected to the output end of the battery; The sixth pin of the connector chip is grounded; The third pin of the connector chip is electrically connected to the first end of the first resistor; The fourth pin of the connector chip is electrically connected to the first end of the second resistor; A second end of the second resistor is grounded.

5. The electronic pen with a replaceable battery module according to claim 1, wherein: The charging circuit includes a charging chip, a first LED lamp, a second LED lamp, a first capacitor, a second capacitor, a third resistor, a fourth resistor and a third adjustable resistor; wherein: The positive electrode of the first LED lamp serves as the second input terminal of the charging circuit; The positive electrode of the first LED lamp is electrically connected to the charging end of the first connector; The positive electrode of the second LED lamp serves as the second input terminal of the charging circuit; The positive electrode of the second LED lamp is electrically connected to the charging end of the first connector; The fourth pin of the charging chip serves as the first input terminal of the charging circuit; The fourth pin of the charging chip is electrically connected to the charging end of the first connector; The third pin of the charging circuit serves as an output end of the charging circuit; The third pin of the charging circuit is electrically connected to the input terminal of the battery; The first pin of the charging chip is electrically connected to the first end of the fourth resistor; The second end of the fourth resistor is electrically connected to the cathode of the first LED lamp; The second pin of the charging chip is grounded; The third pin of the charging chip is grounded through the first capacitor; The fourth pin of the charging chip is grounded through the second capacitor; The fifth pin of the charging chip is electrically connected to the first end of the third resistor; The second end of the third resistor is electrically connected to the cathode of the second LED lamp; The sixth pin of the charging chip is grounded through the third adjustable resistor.

6. The electronic pen with a replaceable battery module according to claim 1, wherein: The battery module also includes a battery protection circuit; wherein: The input end of the battery protection circuit is electrically connected to the output end of the charging circuit; The output end of the battery protection circuit is electrically connected to the battery.

7. The electronic pen with a replaceable battery module according to claim 6, characterized in that: The battery protection circuit includes a fifth resistor; wherein: The first end of the fifth resistor serves as an input end of the battery protection circuit; A first end of the fifth resistor is electrically connected to the output end of the charging circuit; The second end of the fifth resistor serves as the output end of the battery protection circuit; The second end of the fifth resistor is electrically connected to the input end of the battery.

8. The electronic pen with a replaceable battery module according to claim 6, wherein: The first connector also includes a control signal output terminal; the battery protection circuit includes a charging protection chip, a first diode, a second diode, a third diode, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth resistor, a seventh resistor, and an eighth resistor; wherein: The first end of the sixth resistor serves as an input end of the battery protection circuit; A first end of the sixth resistor is electrically connected to the output end of the charging circuit; The second pin of the charging protection chip serves as the output end of the battery protection circuit; The second pin of the charging protection chip is electrically connected to the battery; The first end of the seventh resistor serves as a control signal input end of the battery protection circuit; The first end of the seventh resistor is electrically connected to the control signal output end; The first end of the eighth resistor serves as a control signal input end of the battery protection circuit; A first end of the eighth resistor is electrically connected to the control signal output end; The first pin of the charging protection chip is electrically connected to the second end of the sixth resistor; The first pin of the charging protection chip is grounded through the first diode; The first pin of the charging protection chip is electrically connected to the second pin of the charging protection chip through the third diode; The first pin of the charging protection chip is electrically connected to the second pin of the charging protection chip through the third capacitor; The second pin of the charging protection chip is grounded through the second diode; The second pin of the charging protection chip is grounded through the fifth capacitor; The third pin of the charging protection chip is electrically connected to the second end of the seventh resistor; The third pin of the charging protection chip is grounded through the fourth capacitor; The second end of the eighth resistor is grounded; The fourth pin and the fifth pin of the charging protection chip are both grounded.

9. The electronic pen with a replaceable battery module according to claim 1, wherein: The pen body also includes a control motherboard; wherein: The input end of the control mainboard is electrically connected to the output end of the second connector.

10. The electronic pen with a replaceable battery module according to claim 9, characterized in that: The pen body also includes a power shortage warning module; the first connector also includes a first detection signal output terminal; the control main board also includes a second detection signal input terminal and a warning signal output terminal; wherein: The seventh pin of the first connector serves as the first detection signal output terminal; The seventh pin of the first connector is electrically connected to the first detection signal input terminal of the second connector; The seventh pin of the first connector is electrically connected to the battery; The second detection signal output terminal of the second connector is electrically connected to the second detection signal input terminal; The warning signal output terminal is electrically connected to the warning signal input terminal of the power shortage warning module.

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