WO2019196061A1

WO2019196061A1 - Handwriting sensing pen, refill thereof, and ink volume automatic detection method

Info

Publication number: WO2019196061A1
Application number: PCT/CN2018/082813
Authority: WO
Inventors: 陈松亚
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-04-12
Filing date: 2018-04-12
Publication date: 2019-10-17
Also published as: CN112041794A

Abstract

A handwriting sensing pen (100), a refill (30) thereof, and an ink volume automatic detection method. The refill (30) comprises an ink tube (31), a writing ink (33) filled in the ink tube (31), an electrically-conductive ink (35) arranged at the distal end of the writing ink (33), and, extending in the lengthwise direction of the ink tube (31), a resistor (36) and a first electrically-conductive element (311). The resistance of the resistor (36) is greater than the resistance of the first electrically-conductive element (311). The resistor (36) and the electrically-conductive ink (35) are electrically connected to each other via the first electrically-conductive element (311) and are connected together to an electrically-conductive loop (50). The resistance of the resistor (36) connected to the electrically-conductive loop (50) changes as the remaining volume of the writing ink (33) changes. The method comprises: detecting an electric parameter of the electrically-conductive loop (50); determining, on the basis of the detected electrical parameter, the effective length of the resistor (36) connected to the electrically-conductive loop (50); and determining the remaining volume of the writing ink (33) on the basis of the effective length of the resistor (36).

Description

Handwriting sensor pen and its automatic detection method for refill and ink quantity

Technical field

The present application relates to the field of computer handwriting input technology, and in particular, to a handwriting sensing pen and a method for automatically detecting the refill and ink amount.

Background technique

At present, there is a handwriting sensor pen on the market that supports writing on traditional paper, and at the same time, it can realize the synchronization of the paper screen, which is written and obtained. The refill of this type of handwriting sensor pen is generally a custom disposable refill, and the refill has a metal ink tube, and the ink tube is filled with writing ink. However, since the ink tube is opaque, the refill has no ink position or remaining amount reminding function, and the user cannot view the remaining ink condition of the refill at any time during actual use, and can only find that the refill needs to be replaced when the ink is used up, or Remove the refill from the pen holder to see the remaining ink condition. If you use it outdoors and do not carry the spare refill with you, you will not be able to use the handwriting sensor pen to write and record the relevant content on the paper, which will cause inconvenience to the user and affect the experience.

Summary of the invention

In view of this, the present application provides a handwriting sensing pen and a refill and ink amount automatic detecting method thereof, which can automatically detect the remaining amount of writing ink of the handwriting sensing pen, so as to prompt the remaining amount of writing ink, so that the user can always Viewing the usage status of the writing ink of the refill, so that the user can be reminded to replace the refill in time or prepare an alternate replacement refill in advance.

In a first aspect, the present application provides a refill comprising an ink tube, writing ink filled in the ink tube, conductive ink at the end of the writing ink, and a length along the ink tube An extended resistive member and a first conductive member. The resistive member has a resistivity greater than a resistivity of the first conductive member, and the resistive member is electrically connected to the first conductive member through the conductive ink and is connected together in a conductive loop, and the resistor component is connected The resistance value formed into the conductive loop changes in accordance with the change in the remaining amount of the writing ink.

In a second aspect, the present application provides a handwriting sensing pen comprising a pen holder, a power module, and a refill according to the above first aspect, wherein the power module and the refill are disposed inside the pen case. The handwriting sensor pen further includes:

a detection module electrically connected to the conductive loop for detecting electrical parameters in the conductive loop;

And a processing module, configured to determine an effective length of the resistive member into the conductive loop according to the detected electrical parameter, and determine a remaining amount of the writing ink according to the effective length of the resistive member.

In a third aspect, the present application provides an automatic ink amount detecting method for detecting a remaining amount of the handwriting sensor pen according to the second aspect described above. The method includes:

Detecting electrical parameters in the conductive loop;

Determining, according to the detected electrical parameter, an effective length of the resistor member into the conductive loop;

The remaining amount of the writing ink is determined according to the effective length of the resistor.

The handwriting sensor pen provided by the embodiment of the present application adds a resistor, a first conductive member and a conductive ink to the inside of the cartridge, and connects the resistor member with the first conductive member through the conductive ink. In the conductive loop, the resistance value formed by the resistor member being inserted into the conductive loop changes according to the change of the remaining amount of the writing ink, and then the electrical parameter of the conductive loop is detected in real time, thereby being convertible In order to detect the remaining amount of the writing ink in real time, the user can view the usage state of the writing ink of the refill at any time by performing corresponding prompts according to the remaining amount, thereby being able to determine in advance whether the refill needs to be replaced or prepared in advance. The spare replacement refill provides convenience for the user to use the handwriting sensor pen.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the drawings without any creative work for those skilled in the art.

FIG. 1 is a schematic diagram of a handwriting sensing system according to an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a handwriting sensor pen according to an embodiment of the present application.

3 is a schematic structural view of a refill of the handwriting sensor pen of FIG. 1.

4 is a partial cross-sectional view of the refill of FIG. 3.

Figure 5 is an enlarged schematic view showing the structure of the portion IV in Figure 4.

6 is an equivalent circuit block diagram of a conductive loop formed between the resistor member included in the cartridge of FIG. 3 and the power module of the handwriting sensor pen.

FIG. 7 is a schematic diagram of functional modules of the handwriting sensor pen of FIG. 2. FIG.

FIG. 8 is a schematic flow chart of a method for automatically detecting ink volume of a handwriting sensor pen according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Referring to FIG. 1 , an embodiment of the present application provides a handwriting sensor pen 100 that can be applied to the handwriting sensing system 1000 . The handwriting sensing system 1000 can also include the writing paper 11 and the electronic writing board 12 at the same time, so that the writing content can be synchronously displayed on the paper and the electronic writing board, that is, the ink and the electronic double document can be simultaneously formed. Wherein, the writing paper 11 and the electronic writing board 12 can be simultaneously fixed in the same device for carrying, and it can be understood that the two can also be carried separately. At the time of writing, a blank writing sheet 11 may be overlaid on the electronic tablet 12 for writing. Since this part is not the focus of the invention of the present application, it will not be described here.

Referring to FIG. 2 , the handwriting sensor pen 100 includes a pen holder 20 and a refill 30 disposed inside the pen holder 20 and a power module 40 .

Referring to FIGS. 3-5 together, in the present embodiment, the refill 30 includes an ink tube 31, a writing head 32, and writing ink 33 and sealing ink 34 that are filled in the ink tube 31. Wherein, the ink tube 31 includes opposite first ends 301 and second ends 302, and the writing head 32 is fixed to the second end 302 of the ink tube 31. The color of the writing ink 33 may include a plurality of colors such as red, black, blue, and the like. The sealing ink 34 is located at the end of the writing ink 33. It should be noted that the end of the writing ink 33 referred to in the present application refers to one end of the writing ink 33 away from the writing head 32. It can be understood that the main function of filling the sealing ink 34 at the end of the writing ink 33 is to prevent the writing ink 33 in the ink tube 31 from volatilizing from the end of the ink tube 31, and to ensure the writing time. The smoothness of the writing ink 33 flowing along the inner wall of the ink tube 31 is described. In the present embodiment, the density of the sealing ink 34 is smaller than the density of the writing ink 33, such that the sealing ink 34 and the writing ink 33 are mutually incompatible with each other, and the sealing ink 34 is also used for sealing. The writing ink 33 is housed.

The writing head 32 includes a ball 321 embedded in the free end of the writing head 32. During writing, the ball 321 rolls as the writing head 32 slides on the writing surface to write the writing The ink 33 is taken out of the ink tube 31, so that the writing ink 33 and the sealing ink 34 are gradually moved toward the free end of the writing head 32, thereby ensuring that the ball 321 can smoothly draw the writing ink 33 to realize smooth writing. purpose. Since the principle of writing the refill 30 on a sheet of paper is similar to that of a conventional ink pen on a sheet of paper, and this portion is not the focus of the invention of the present application, it will not be described herein.

In the embodiment, the refill 30 further includes a conductive ink 35, a resistor 36, and a first conductive member 311. The conductive ink 35 is filled in the ink tube 31 and located at the end of the writing ink 33. In the present embodiment, the refill 30 includes two sections of the sealing ink 34, and the conductive ink 35 is located between the two sections of the sealing ink 34.

The resistor member 36 and the first conductive member 311 extend in the longitudinal direction of the ink tube 31, respectively. In the embodiment, the resistivity of the resistor 36 is greater than the resistivity of the first conductive member 311, and the resistor 36 is electrically connected to the first conductive member 311 through the conductive ink 35. In a conductive loop 50 (shown in FIG. 6), the resistance value formed by the resistor 36 in the conductive loop 50 changes in accordance with the change in the remaining amount of the writing ink 33.

Specifically, in the embodiment, the resistor member 36 and the first conductive member 311 are both disposed in the ink tube 31 and extend from the first end 301 of the ink tube 31 to the ink tube 31, respectively. The second end 302. The refill 30 further includes a second conductive member 38 penetrating the inner and outer surfaces of the tube wall 312 of the ink tube 31 and a conductive contact end 371 disposed at the first end 301 of the ink tube 31, wherein One end of one of the resistor member 36 and the first conductive member 311 is electrically connected to the conductive contact end 371, and the other is electrically connected to the second conductive member 38.

When the refill 30 is assembled into the pen holder 20 of the handwriting sensing pen 100, the conductive contact end 371 is electrically connected to the first electrode of the power module 40 of the handwriting sensing pen 100, the second conductive The member 38 is electrically connected to the second electrode of the power module 40 such that one end of the resistor member 36 and the first conductive member 311 can pass through the conductive contact end 371 and the power module 40 One electrode is electrically connected, and the other is electrically connectable to the second electrode of the power module 40 through the second conductive member 38.

Thus, as shown in the equivalent circuit block diagram of FIG. 6, the resistor member 36, the conductive ink 35, the first conductive member 311, the second conductive member 38, and the power module 40 may constitute the conductive loop 50 together. The resistor 36 is electrically connected to the first conductive member 311 through the conductive ink 35 to form a potentiometer 51 in the conductive loop 50 that changes in resistance value following a change in the remaining amount of the writing ink 33.

In the present embodiment, as shown in FIG. 4-5, the refill 30 further includes a fixing plug 37 fixed to an end of the first end 301 of the ink tube 31, the fixing plug The conductive contact end 371 is disposed on an outer surface of the ink tube 31, and one end of the resistor member 36 and the first conductive member 311 is fixed and penetrates through the fixing plug 37, and The conductive contact ends 371 are electrically connected. In the present embodiment, the fixing plug 37 is made of an insulating material.

In one embodiment, as shown in FIGS. 4-5, the resistor member 36 includes opposite first ends 361 and second ends 362, and the first end 361 of the resistor member 36 is fixed to the ink tube 31. The first end 301 is electrically connected to the conductive contact end 371. When the refill 30 is assembled into the pen holder 20 of the handwriting sensor pen 100, the first end 361 of the resistor member 36 is electrically connected to the first electrode of the power module 40 through the conductive contact end 371. .

The second end 362 of the resistor member 36 extends through the sealing ink 34 and the conductive ink 35, respectively, into the writing ink 33, and extends to the second end 302 of the ink tube 31.

It can be understood that the second end 362 of the resistor member 36 can extend into the writing head 32 and be at a predetermined distance from the free end of the writing head 32. Alternatively, the second end 362 of the resistive member 36 can extend to the second end 302 of the ink tube 31 and oppose the writing head 32.

In the above embodiment, the resistor member 36 is an elongated resistance wire whose resistance value can be increased as its length increases, and its resistivity is much larger than the resistivity of the first conductive member 311. The resistance value of the first conductive member 311 does not change significantly with the increase or decrease of its length.

In the above embodiment, the first conductive member 311 is fixed to the tube wall 312 of the ink tube 31 and electrically connected to the second conductive member 38. When the refill 30 is assembled into the pen holder 20, the first conductive member 311 is electrically connected to the second electrode of the power module 40 through the second conductive member 38.

It can be understood that the first conductive member 311 may be in close contact with the inner surface of the tube wall 312 of the ink tube 31, or may be spaced apart from the inner surface of the tube wall 312 of the ink tube 31 by a predetermined distance. This does not limit the fixing manner of the first conductive member 311 as long as the first conductive member 311 can be fixed in the ink tube 31.

In another embodiment, one end of the first conductive member 311 is fixed to the first end 301 of the ink tube 31, and is electrically connected to the conductive contact end 371, and the resistor member 36 is fixed to the The tube wall 312 of the ink tube 31 is electrically connected to the second conductive member 38. Wherein, in the other embodiment, the position of the second conductive member 38 on the ink tube 31 is close to the end of the first end 301 or the second end 302 of the ink tube 31, so that The change in the resistance value formed by the resistor member 36 in the conductive loop always responds to the change in the remaining amount of the writing ink.

It can be understood that the resistor member 36 may be in close contact with the inner surface of the tube wall 312 of the ink tube 31, or may be spaced apart from the inner surface of the tube wall 312 of the ink tube 31 by a predetermined distance. The fixing manner of the resistor member 36 is limited as long as the resistor member 36 can be fixed in the ink tube 31.

Referring to FIG. 2 again, in the present embodiment, the pen case 20 includes a conductive inner wall 201 and a third conductive member 24 , wherein the conductive inner wall 201 is electrically connected to the second electrode of the power module 40 . The third conductive member 24 is disposed on the conductive inner wall 201 and opposite to the assembled position of the second conductive member 38 on the refill 30. The third conductive member 24 is electrically connected to the conductive inner wall 201, and is electrically connected to the second conductive member 38 on the refill 30 when the refill 30 is assembled into the pen holder 20, thereby The second conductive member 38 can be electrically connected to the second electrode of the power module 40 through the third conductive member 24 and the conductive inner wall 201 of the pen holder 20 . It can be understood that, in order to avoid unnecessary electrical connection between the outer surface of the refill 30 and the conductive inner wall 201 of the pen holder 20, the outer surface of the tube wall 312 of the ink tube 31 can also be insulated.

In the embodiment, the second conductive member 38 is a conductive ring surrounding the ink tube 31. The third conductive member 24 is a metal dome. The first electrode is a negative electrode and the second electrode is a positive electrode. Optionally, in other embodiments, the first electrode may be a positive electrode and the second electrode may be a negative electrode.

During the writing process, the position of the sealing ink 34 and the conductive ink 35 in the ink tube 31 is continuously reduced with the writing ink 33 under the condition that the refill 30 does not leak oil backward. Moving toward the second end 302 of the ink tube 31. During the movement of the position of the conductive ink 35, the conductive position of the conductive ink 35 and the resistor member 36 also changes, and the effective length of the resistor member 36 is inserted into the conductive loop 50. Corresponding changes occur as well as a decrease in the writing ink 33, so that the resistance value in the conductive loop 50 is also significantly changed. At the same time, although the length of the first conductive member 311 into the conductive loop 50 is constantly changing, the change in the resistance value of the first conductive member 311 into the conductive loop 50 is not obvious. It can even be ignored. Thus, the effective resistance value of the potentiometer 51 connected to the conductive circuit 50 also changes accordingly, and the resistance component 36 can be determined to be connected to the conductive loop according to the changed resistance value of the potentiometer 51. The effective length in 50, in turn, determines the length of the remaining amount of the writing ink 33 within the ink tube 31. It can be understood that the effective length of the resistor member of the volume of the present application refers to the length of the resistor member corresponding to the resistance value formed in the conductive loop.

As shown in FIG. 6-7, in the embodiment, the handwriting sensor pen 100 further includes a detecting module 61 disposed inside the pen holder 20 and a processing module 62, wherein the detecting module 61 is electrically connected to the In the conductive loop 50, for detecting electrical parameters in the conductive loop 50, the processing module 62 is configured to determine an effective length of the resistor 36 to be inserted into the conductive loop 50 according to the detected electrical parameter. And determining the remaining amount of the writing ink 33 based on the effective length of the resistor member 36.

The detection module 61 can be a detection circuit or a detection device. The specific structure of the detection module 61 is not limited in the embodiment of the present application, as long as the detection module 61 can detect the electrical parameters in the conductive loop 50. The processing module 62 can be a single chip microcomputer, a Micro Control Unit (MCU), or the like.

Specifically, in an embodiment, when the processing module 62 determines that the resistor 36 is in the effective length of the conductive loop 50 according to the detected electrical parameter, the processing module 62 is specifically configured to: according to the detection Determining, by the electrical parameter and the preset first correspondence, an effective length of the resistor member 36 in the conductive loop 50, wherein the first correspondence defines the electrical parameter and the resistor in advance A linear relationship between the effective lengths of the members 36, which may include voltage values or current values, and the like.

For convenience of description, the present application has one end of the resistor member 36 fixed to the first end 301 of the ink tube 31, and is electrically connected to the conductive contact end 371, and the first conductive member 311 is fixed to the ink. The tube wall 312 of the tube 31 is electrically connected to the second conductive member 38 as an example, and a specific example of how to determine the effective length of the resistor member 36 into the conductive loop 50 is exemplified.

For example, if the electrical parameter is a voltage value across the potentiometer 51, the first correspondence may be preset as: (U0-U)/R1=U/(R2+ρ*L/S), wherein U0 is the voltage value of the power module 40, U is the voltage value of the potentiometer 51 detected by the detecting module 61, and R1 is the sum of the resistance values of other conductive components in the conductive loop 50. For example, the sum of the resistance values of the conductive ink 35, the second conductive member 38, the third conductive member 24, the conductive inner wall 201 of the pen holder 20, and the like, R2 is the resistance value of the first conductive member 311, and ρ is the The resistivity of the resistor member 36, L is the effective length of the resistor member 36, and S is the cross-sectional area of the resistor member 36. As described above, the change in the resistance value of the resistance value R2 of the first conductive member 311 into the conductive loop 50 is not obvious, and may even be negligible, so the value of R2 can be regarded as a fixed value. The values of other parameters U0, R1, ρ, and S are also fixed values, which can be determined by pre-measured data or factory values. Thus, the effective length L of the resistor 36 can be calculated based on the detected voltage value U across the potentiometer 51 and the first correspondence.

For another example, if the electrical parameter is a current value flowing through the conductive loop 50, the first correspondence may be preset as: U0=I*(R1+R2+ρ*L/S), where U0 For the voltage value of the power module 40, I is the current value flowing through the conductive loop 50 detected by the detecting module 61, and R1 is the sum of the resistance values of other conductive components in the conductive loop 50, For example, the sum of the resistance values of the conductive ink 35, the second conductive member 38, the third conductive member 24, the conductive inner wall 201 of the pen holder 20, etc., R2 is the resistance value of the first conductive member 311, and ρ is the resistance The resistivity of the member 36, L is the effective length of the resistor member 36, and S is the cross-sectional area of the resistor member 36. As described above, the values of the parameters U0, R1, R2, ρ, S are fixed values or can be regarded as fixed values, and can be determined by pre-measured data or factory values. Thus, the effective length L of the resistor 36 can be calculated based on the detected current value I flowing through the conductive loop 50 and the first correspondence.

It is to be understood that the first correspondence is not limited to the above examples, and those skilled in the art may also make some modifications based on the examples.

It can be understood that, in another embodiment, when the processing module 62 determines the effective length of the resistor 36 to enter the conductive loop 50 according to the detected electrical parameter, the processing module 62 is specifically configured to: Determining, according to the detected electrical parameter and the preset first correspondence table, an effective length range of the resistor component 36 in the conductive loop 50, wherein the first correspondence table pre-records the A correspondence between a plurality of parameter ranges of the electrical parameters and a plurality of length ranges of the effective length of the resistor member 36.

In an embodiment, when the processing module 62 determines the remaining amount of the writing ink 33 according to the effective length of the resistor 36, the processing module 62 is specifically configured to: according to the effective length of the resistor 36 And a preset second correspondence relationship, determining a length of the remaining amount of the writing ink 33 in the ink tube 31, and determining the length according to the remaining amount of the writing ink 33 in the ink tube 31. The remaining amount of writing ink 33 is a percentage of the initial ink amount of the writing ink 33. Wherein, the second correspondence relationship pre-defines a correspondence relationship between the effective length of the resistance member and the remaining amount of the writing ink in the ink tube.

For example, the second correspondence may be preset as: L1=L0-L, where L1 is the length of the remaining amount of the writing ink 33 in the ink tube 31, and L0 is inside the tube of the ink tube 31. The total length can be determined by pre-measured data or factory values, L being the effective length of the resistive member 36. Thus, the length L1 of the remaining amount of the writing ink 33 in the ink tube 31 can be calculated based on the effective length L of the resistor 36 and the second correspondence relationship.

The calculation formula of the remaining amount of the writing ink 33 as a percentage of the initial ink amount of the writing ink 33 may be set as: C=L1/L2, wherein L1 is the remaining amount of the writing ink 33 in the ink tube The length in 31, L2 is the length of the initial ink amount of the writing ink 33 in the ink tube 31, and can be determined by pre-measured data or factory values.

It is to be understood that the second correspondence and the percentage are not limited to the above examples, and those skilled in the art may also make some modifications based on the examples.

It can be understood that, in another embodiment, when the processing module 62 determines the remaining amount of the writing ink 33 according to the effective length of the resistor 36, the processing module 62 is specifically configured to: according to the resistor The effective length range of 36 and the preset second correspondence table determine a length range of the remaining amount of the writing ink 33 in the ink tube 31, and then according to the remaining amount of the writing ink 33 The length range within the ink tube 31 determines a percentage of the remaining amount of the writing ink 33 as a percentage of the initial ink amount of the writing ink 33. Wherein the second correspondence table pre-records a plurality of length ranges of the effective length of the resistor 36 and a plurality of length ranges of the length of the writing ink 33 in the ink tube 31 Correspondence relationship.

In the embodiment, the processing module 62 is further configured to generate a corresponding state prompt signal according to the remaining amount of the writing ink 33 to promptly display the remaining amount of the writing ink 33.

In the present embodiment, as shown in FIG. 2 and FIG. 7 , the handwriting sensor pen 100 further includes a state indicating device 70 and a control module 63 , wherein the state indicating device 70 is disposed on an outer surface of the pen case 20 , It can be used to indicate the state in which the refill 30 is mounted and the remaining amount of the refill 30.

In the embodiment, the control module 63 is configured to control the state indicating device 70 to promptly display the remaining amount of the writing ink 33 according to the state indication signal.

Specifically, the status indication signal may include a plurality of status signals corresponding to different remaining amounts of writing ink, and the status indicating device 70 is an LED indicator light that can emit multiple colors of light, the indicator light can be different according to different The status signal emits light of a different color, indicating a different amount of writing ink remaining.

For example, the blue light indicates a state in which the remaining amount of writing ink is sufficient, for example, a state in which the remaining amount of writing ink is greater than 70%, and a yellow light indicates a state in which the remaining amount of writing ink is sufficient, for example, the remaining amount of writing ink is 70% to 40%. In the state of time, the red light indicates a state in which the remaining amount of the writing ink is insufficient, for example, a state in which the remaining amount of the writing ink is less than 30%, and when the indicator light is not lit, the state in which the writing ink is used up or the state in which the writing is not performed is indicated.

In this way, the state prompt signal corresponding to the remaining amount of the writing ink 33 is converted into a color control signal corresponding to the LED indicator, so that the LED lamp can be controlled to emit different colors of light corresponding to different remaining amounts of writing ink, so that the user can use The writing ink usage state of the refill 30 can be intuitively understood at any time during the process of the handwriting sensing pen 100.

In the embodiment, the handwriting sensor pen 100 further includes a wireless communication module 64, and the handwriting sensor pen 100 can communicate and exchange data with other electronic devices through the wireless communication module 64. The wireless communication module 64 can be a Bluetooth communication module, an infrared communication module, or a WiFi communication module. The other electronic devices include smart mobile terminals such as mobile phones and tablet computers.

Optionally, in an embodiment, the wireless communication module 64 is configured to send the status indication signal to the other electronic device, so that the other electronic device can perform the remaining amount of the writing ink. The corresponding prompt.

It can be understood that, in actual use, the control module 63 can control the wireless communication module 64 to periodically send the status indication signal to the other electronic device in real time or at predetermined time intervals according to actual needs. .

Optionally, in an embodiment, the wireless communication module 64 is configured to send a wireless signal including the remaining amount information of the writing ink to the other electronic device, so that the other electronic device can The remaining amount of the writing ink is prompted accordingly. Wherein, the remaining amount information of the writing ink may be a percentage of the remaining amount of the writing ink to the initial ink amount of the writing ink 33.

Optionally, in an embodiment, the wireless communication module 64 is configured to send a wireless signal including the detected electrical parameter to the other electronic device, so that the other electronic device is configured according to the The electrical parameters determine the remaining amount of the writing ink 33 and provide a corresponding indication of the remaining amount of the writing ink.

It can be understood that, in this embodiment, the handwriting sensing pen 100 only needs to detect the electrical parameter without performing data processing, so that the processing module 62 can be omitted, and the handwriting sensing pen 100 is simplified. The structure further reduces the production cost of the handwriting sensor pen 100, and at the same time, saves the battery power consumed by the handwriting sensor pen 100 due to data processing.

It can be understood that the information related to the remaining amount of the writing ink is synchronously transmitted to other electronic devices, and the user can view the ink usage state of the refill 30 at any time during the process of using the other electronic device.

Optionally, in an embodiment, the wireless communication module 64 is further configured to send a wireless signal including the detected electrical parameter to another electronic device, so that the other electronic device is configured according to the electrical The parameter determines a remaining amount of the writing ink 33 and generates a corresponding status prompting signal, or the wireless communication module 64 is further configured to send a wireless signal including the remaining amount of the writing ink to other electronic devices, so that The other electronic device generates a corresponding status prompt signal according to the remaining amount of the writing ink. The wireless communication module 64 is further configured to receive the status prompting signal sent by the other electronic device, so that the control module 63 of the handwriting sensing pen 100 controls the status indicating device according to the received status indication signal. 70 correspondingly prompts the remaining amount of the writing ink.

The handwriting sensing pen 100 provided by the embodiment of the present application adds a resistor 36, a first conductive member 311 and a conductive ink 35 to the inside of the refill 30, and the resistor 36 is electrically connected to the The first conductive member 311 is inserted into the conductive loop 50 such that the resistance value formed by the resistor 36 entering the conductive loop 50 changes according to the change of the remaining amount of the writing ink 33, and then The electrical parameters of the conductive loop 50 are detected in real time, so that it can be converted into real-time detection of the remaining amount of the writing ink 33, and finally, by corresponding prompting according to the remaining amount, the user can view the writing ink of the refill 30 at any time. The use state can be determined in advance whether it is necessary to replace the refill or prepare the replacement refill in advance, which is convenient for the user to use the handwriting sensor pen 100.

In the present application, the refill 30 can be a custom metal refill. It can be understood that the pen case 20 can also be compatible with the refills of other handwriting sensor pens commonly used in the industry.

Referring to FIG. 2 again, in the present embodiment, the pen case 20 includes a pen tip 21 and a pen holder 22, wherein the pen holder 22 includes the conductive inner wall 201 and opposite first ends 221 and second ends 222, The pen tip 21 is fixed to the second end 222 of the pen holder 22. It can be understood that the pen head 21 and the pen holder 22 can be fixed to each other by a screw connection or the like.

It can be understood that, in one embodiment, in order to realize the assembly of the refill 30 and enable the refill 30 to be telescoped from the pen holder 20 to protect the writing head 32 of the refill 30, The pen cover 20 can also be provided with a pressing mechanism (not shown) and an elastic mechanism (not shown) for driving the refill 30 to retract relative to the pen holder 20. In another embodiment, to protect the writing head 32 of the refill 30, the pen holder 20 further includes a cap (not shown) that is removably fitted to the second end 222 of the barrel 22. Since this part is not the focus of the invention of the present application, it will not be described here.

The power module 40 may include a battery 41, a positive electrode tab 42, and a negative electrode tab 43. It can be understood that, in order to realize the assembly of the power module 40, the battery case 202 may be disposed inside the pen holder 20, and the positive electrode piece 42 and the negative electrode piece 43 may be respectively fixed to the opposite sides of the battery case 202. On both inner walls.

In the embodiment, the battery compartment 202 is disposed at the first end 221 of the pen holder 22 . The pen holder 20 further includes a tail plug seat 23 disposed at an open end of the battery compartment 202 and detachably fixed to the first end 221 of the pen holder 22 to facilitate the battery 41 Assembly and disassembly.

In the present embodiment, the negative electrode tab 43 is disposed at the bottom of the battery compartment 202, and when the refill 30 is assembled into the pen holder 20, the conductive contact end on the refill 30 371 electrical connection. The positive electrode tab 42 is disposed on the tail plug seat 23 and electrically connected to the conductive inner wall 201 of the sheath 22 . The inner surface of the tail plug 23 may be partially or completely electrically conductive inner wall, and the conductive inner wall of the tail plug 23 is electrically connected to the conductive inner wall 201 of the sheath 22 or the inside of the tail plug 23 The surface may be provided with a conductive connection member electrically connected to the conductive inner wall 201 of the sheath 22 and the positive electrode sheet 42 respectively, thereby realizing the positive electrode sheet 42 and the conductive inner wall 201 of the sheath 22 Electrical connection. In other embodiments, the positive electrode tab 42 and the negative electrode tab 43 may be oppositely disposed on a sidewall of the battery compartment 202.

In the embodiment, the handwriting sensor pen 100 further includes a main circuit board 60, wherein the detecting module 61, the processing module 62, the control module 63, and the wireless communication module 64 are all disposed on the main circuit board 60. . It can be understood that the detection module 61, the processing module 62 and the control module 63 can be integrated in the same chip, such as a micro-processing chip, or can be disposed on different chips.

It can be understood that, in order to realize the assembly of the main circuit board 60, the pen holder 20 may be internally provided with a fixing bracket 203 for fixing the main circuit board 60.

It can be understood that, in order to realize synchronous display of the writing content on the electronic writing board 12, the handwriting sensing pen 100 may further include an inductive structure such as a pressure sensing module 81 and an induction coil 82. The pressure sensing module 81 can be disposed in contact with the first end 301 of the refill 30. The induction coil 82 can be disposed inside the pen case 20 and located at the pen head 21 and the pen holder 22 At the office. Since the principle of displaying the written content of the handwriting sensor pen 100 on the electronic tablet 12 is similar to the writing principle of the existing handwriting pen, and this portion is not the focus of the invention of the present application, it will not be described herein.

It can be understood that, as shown in FIG. 7 , the handwriting sensor pen 100 can further include a storage module 65, a power management module 66, a power switch 71, and the like, wherein the storage module 65 and the power management module 66 can be disposed in the On the main circuit board 60, the storage module 65 can be configured to pre-store the first correspondence, the second correspondence, the first correspondence table, the second correspondence table, and the like. The storage module 65 may include a high speed random access memory, and may also include a nonvolatile memory such as a smart memory card (SMC), a flash card, or the like.

The power management module 66 can be used to manage the power of the handwriting pen 100. As shown in FIG. 2, the power switch 71 can be disposed on an outer surface of the pen holder 20 for controlling the on and off of the power of the handwriting sensor pen 100. The power management module 66 can employ a power management IC (PMIC).

The present application solves the problem that the current handwriting sensor pen 100 cannot display the remaining amount of writing ink in real time with a simple structure, and can simultaneously form electronic and ink double documents, and can be applied to fields such as electrification and network education.

FIG. 8 is a schematic flow chart of a method for automatically detecting ink volume of a handwriting sensor pen according to an embodiment of the present application. The automatic ink amount detecting method can be applied to the above-described handwriting sensor pen. As shown in FIG. 8, the automatic ink amount detecting method includes the following steps:

Step 801: Detect electrical parameters in the conductive loop.

Wherein, the electrical parameter may include a voltage value or a current value or the like.

Step 802: Determine, according to the detected electrical parameter, an effective length of the resistor component to be inserted into the conductive loop.

In an embodiment, the step 802 may specifically include:

And determining, according to the detected electrical parameter and the preset first correspondence, an effective length of the resistor component to be inserted into the conductive loop.

Wherein the first correspondence defines a linear relationship between the electrical parameter and an effective length of the resistor.

In another implementation, the step 802 may specifically include:

And determining, according to the detected electrical parameter and the preset first correspondence table, an effective length range in which the resistor is inserted into the conductive loop.

The first correspondence table pre-records a correspondence between a plurality of parameter ranges of the electrical parameter and a plurality of length ranges of an effective length of the resistor.

Step 803, determining a remaining amount of the writing ink according to the effective length of the resistor.

In an embodiment, the step 803 may specifically include:

Determining a length of the remaining amount of the writing ink in the ink tube according to the effective length of the resistance member and a preset second correspondence relationship;

A percentage of the remaining amount of the writing ink to the initial ink amount of the writing ink is determined according to the length of the remaining amount of the writing ink in the ink tube.

Wherein, the second correspondence relationship pre-defines a correspondence relationship between the effective length of the resistance member and the remaining amount of the writing ink in the ink tube.

In another implementation, the step 803 may specifically include:

Determining, according to the effective length range of the resistor member and a preset second correspondence table, a length range of the remaining amount of the writing ink in the ink tube;

Determining, according to a length range of the remaining amount of the writing ink, a range of a length of the writing ink in a percentage of an initial ink amount of the writing ink;

The second correspondence table records in advance a correspondence relationship between a plurality of length ranges of the effective length of the resistor and a plurality of length ranges of the remaining amount of the writing ink in the ink tube.

In this embodiment, the method for automatically detecting the amount of ink may further include the steps of:

Generating a corresponding status prompt signal according to the remaining amount of the writing ink;

And controlling the state indicating device to promptly display the remaining amount of the writing ink according to the state indication signal.

Specifically, the status indication signal may include a plurality of status signals corresponding to different remaining amounts of writing ink, the status indicating device being an LED indicator light that can emit multiple colors of light, the indicator light being capable of being different according to different The status signal emits light of a different color, indicating a different amount of writing ink remaining.

In this way, the state prompt signal corresponding to the remaining amount of the writing ink is converted into a color control signal corresponding to the LED indicator, so that the LED lamp can be controlled to emit different colors of light corresponding to different remaining amounts of writing ink, so that the user can use the In the process of the handwriting sensor pen, the writing ink usage state of the refill can be intuitively understood at any time.

Optionally, in an embodiment, the method for automatically detecting the amount of ink may further include the steps of:

Transmitting, to the other electronic device, the wireless signal including the detected electrical parameter, so that the other electronic device determines the remaining amount of the writing ink according to the electrical parameter and generates a corresponding status prompt signal, or Transmitting a wireless signal containing the remaining amount of the writing ink to other electronic devices, so that the other electronic device generates a corresponding status prompt signal according to the remaining amount of the writing ink;

Receiving the status prompt signal sent by the other electronic device, and controlling the status indication device to promptly display the remaining amount of the writing ink according to the received status indication signal.

A wireless signal containing the remaining amount of the writing ink is sent to other electronic devices to enable the other electronic devices to promptly indicate the remaining amount of the writing ink.

Wherein, the remaining amount information of the writing ink may be a percentage of the remaining amount of the writing ink to the initial ink amount of the writing ink 33.

Transmitting, to the other electronic device, a wireless signal including the detected electrical parameter, so that the other electronic device determines a remaining amount of the writing ink according to the electrical parameter, and performs a remaining amount of the writing ink The corresponding prompt.

It can be understood that the information related to the remaining amount of the writing ink is synchronously transmitted to other electronic devices, and the user can view the ink usage state of the refill at any time during the process of using the other electronic devices.

The method for automatically detecting the ink amount of the handwriting sensor pen provided by the embodiment of the present application, the electrical parameter of the conductive loop formed by the resistor component of the refill, the first conductive component, the conductive ink and the power module of the handwriting sensor pen Real-time detection, which can be converted into real-time detection of the remaining amount of writing ink, and finally, by corresponding prompting according to the remaining amount of writing ink, the user can view the use state of the writing ink of the refill at any time, thereby being able to It is convenient to determine whether it is necessary to replace the refill or prepare an alternate replacement refill in advance for the user to use the handwriting sensor pen.

It should be noted that the above embodiments are only used to explain the technical solutions of the present application, and are not limited thereto. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technology of the present application can be applied. Modifications or equivalents of the embodiments are not to be construed as a departure from the spirit and scope of the invention.

Claims

A refill comprising an ink tube and writing ink filled in the ink tube, further comprising a conductive ink at an end of the writing ink, and extending along a length of the ink tube And a resistive member having a resistivity higher than a resistivity of the first conductive member, wherein the resistive member and the first conductive member are electrically connected through the conductive ink and are connected together In the conductive loop, a resistance value formed by the resistance member being inserted into the conductive loop changes in accordance with a change in a remaining amount of the writing ink.
A refill according to claim 1 wherein said refill comprises two sections of sealing ink at the end of said writing ink, said electrically conductive ink being located between two sections of said sealing ink.
The refill according to claim 1, wherein said ink tube comprises opposite first and second ends, and said resistor member and said first conductive member are disposed in said ink tube and respectively a first end of the ink tube extends to a second end of the ink tube;

The refill further includes a second conductive member penetrating the inner and outer surfaces of the tube wall of the ink tube, a conductive contact end provided at the first end of the ink tube, and a writing fixed to the second end of the ink tube a first one of the resistor member and the first conductive member is electrically connected to the conductive contact end, and the other is electrically connected to the second conductive member;

Wherein, when the refill is assembled into the pen holder of the handwriting sensor pen, the conductive contact end is electrically connected to the first electrode of the power module of the handwriting sensor pen, the second conductive member and the second conductive member The second electrode of the power module is electrically connected, such that the resistor, the conductive ink, the first conductive member, the second conductive member, and the power module together form the conductive loop, and the resistor and the first conductive member pass The conductive ink is electrically connected to form a potentiometer in the conductive loop that changes in resistance value following a change in the remaining amount of the writing ink.
The refill according to claim 3, wherein said refill further comprises a fixing plug, said fixing plug being fixed to an end of said first end of said ink tube, said fixing plug being remote from said ink tube The conductive contact end is disposed on an outer surface of the resistor member, and one end of the resistor member and the first conductive member is fixed to the through-fixing plug and electrically connected to the conductive contact end.
The refill according to claim 3 or 4, wherein one end of the resistor member is fixed to the first end of the ink tube and electrically connected to the conductive contact end, and the first conductive member is fixed a wall of the ink tube and electrically connected to the second conductive member; or

One end of the first conductive member is fixed to the first end of the ink tube, and is electrically connected to the conductive contact end, the resistor member is fixed to the tube wall of the ink tube, and is connected to the second conductive An electrical connection, wherein the second conductive member is located on the ink tube near an end of the first end or the second end of the ink tube.
A refill according to claim 1, wherein said resistor member is an elongated electric resistance wire, and a resistance value of said electric resistance wire increases as the length of the electric resistance wire increases.
A handwriting sensing pen comprising a pen holder, a power module, and a refill according to any one of claims 1-6, wherein the power module and the refill are disposed inside the pen holder, wherein the handwriting sensor pen Also includes:

a detection module electrically connected to the conductive loop for detecting electrical parameters in the conductive loop;

And a processing module, configured to determine an effective length of the resistive member into the conductive loop according to the detected electrical parameter, and determine a remaining amount of the writing ink according to the effective length of the resistive member.
The handwriting sensor pen according to claim 7, wherein the processing module is further configured to generate a corresponding state prompt signal according to the remaining amount of the writing ink;

The handwriting sensor pen further includes:

a state indicating device disposed on an outer surface of the pen case;

And a control module, configured to control, according to the status indication signal, the status indication device to promptly prompt the remaining amount of the writing ink.
A handwriting sensing pen according to claim 8, wherein said status indicating signal comprises a plurality of status signals corresponding to different remaining amounts of writing ink, said status indicating means being an indicator light, said indicator light being capable of Different colors of light are emitted according to different status signals, thereby indicating different amounts of writing ink remaining.
The handwriting sensor pen according to claim 7, wherein the pen holder comprises:

a conductive inner wall electrically connected to the second electrode of the power module;

a third conductive member disposed on the conductive inner wall and opposite to an assembly position of the second conductive member on the refill, the third conductive member being electrically connected to the conductive inner wall, and in the refill When being assembled into the pen holder, electrically connecting with the second conductive member on the refill, so that the second conductive member passes through the third conductive member and the conductive inner wall of the pen holder and the power module The second electrode is electrically connected.
The handwriting sensing pen according to claim 10, wherein the second conductive member is a conductive ring surrounding the ink tube, and the third conductive member is a metal elastic piece.
An automatic ink amount detecting method for detecting the remaining amount of writing ink of the handwriting sensor pen according to claim 7, wherein the method comprises:

Detecting electrical parameters in the conductive loop;

Determining, according to the detected electrical parameter, an effective length of the resistor member into the conductive loop;

The remaining amount of the writing ink is determined according to the effective length of the resistor.
The method of automatically detecting the amount of ink according to claim 12, wherein said "determining the effective length of said resistor member in said conductive loop based on said detected electrical parameter" comprises:

Determining, according to the detected electrical parameter and the preset first correspondence, an effective length of the resistor component to enter the conductive loop, wherein the first correspondence defines the electrical parameter and the A linear relationship between the effective lengths of the resistive members.
The automatic ink amount detecting method according to claim 13, wherein said "determining the remaining amount of said writing ink according to said effective length of said resistor member" comprises:

Determining a length of the remaining amount of the writing ink in the ink tube according to the effective length of the resistance member and a preset second correspondence relationship;

Determining, according to the length of the remaining amount of the writing ink, the length of the writing ink as a percentage of the initial ink amount of the writing ink;

Wherein, the second correspondence relationship pre-defines a correspondence relationship between the effective length of the resistance member and the remaining amount of the writing ink in the ink tube.
The method for automatically detecting the amount of ink according to claim 12, wherein said "determining the effective length of said resistor member in said conductive loop according to said detected electrical parameter" comprises:

Determining, according to the detected electrical parameter and the preset first correspondence table, an effective length range of the resistor component in the conductive loop, wherein the first correspondence table pre-records the electrical parameter Correspondence between a plurality of parameter ranges and a plurality of length ranges of the effective length of the resistor member.
The automatic ink amount detecting method according to claim 15, wherein said "determining the remaining amount of said writing ink according to said effective length of said resistor member" comprises:

Determining, according to the effective length range of the resistor member and a preset second correspondence table, a length range of the remaining amount of the writing ink in the ink tube;

Determining, according to a length range of the remaining amount of the writing ink, a range of a length of the writing ink in a percentage of an initial ink amount of the writing ink;

The second correspondence table records in advance a correspondence relationship between a plurality of length ranges of the effective length of the resistor and a plurality of length ranges of the remaining amount of the writing ink in the ink tube.
The method of automatically detecting the amount of ink according to claim 12, wherein the handwriting sensor further comprises a state indicating device disposed on an outer surface of the handwriting sensor pen, the method further comprising:

Generating a corresponding status prompt signal according to the remaining amount of the writing ink;

And controlling the state indicating device to promptly display the remaining amount of the writing ink according to the state indication signal.
The method of automatically detecting the amount of ink according to claim 17, wherein the method further comprises:

The status indication signal is sent to other electronic devices to enable the other electronic devices to promptly indicate the remaining amount of the writing ink.
The method of automatically detecting the amount of ink according to claim 12, wherein the handwriting sensor further comprises a state indicating device disposed on an outer surface of the handwriting sensor pen, the method further comprising:

Transmitting, to the other electronic device, the wireless signal including the detected electrical parameter, so that the other electronic device determines the remaining amount of the writing ink according to the electrical parameter and generates a corresponding status prompt signal, or Transmitting a wireless signal containing the remaining amount of the writing ink to other electronic devices, so that the other electronic device generates a corresponding status prompt signal according to the remaining amount of the writing ink;

Receiving the status prompt signal sent by the other electronic device, and controlling the status indication device to promptly display the remaining amount of the writing ink according to the received status indication signal.
The method of automatically detecting the amount of ink according to claim 12, wherein the method further comprises:

Transmitting a wireless signal containing the remaining amount of the writing ink to other electronic devices to enable the other electronic devices to promptly indicate the remaining amount of the writing ink; or

Transmitting, to the other electronic device, a wireless signal including the detected electrical parameter, so that the other electronic device determines a remaining amount of the writing ink according to the electrical parameter, and performs a remaining amount of the writing ink The corresponding prompt.