CN109828684B

CN109828684B - An electronic pen

Info

Publication number: CN109828684B
Application number: CN201910168003.9A
Authority: CN
Inventors: 何绍林
Original assignee: Hanwang Technology Co Ltd
Current assignee: Hanwang Technology Co Ltd
Priority date: 2019-03-06
Filing date: 2019-03-06
Publication date: 2025-01-14
Anticipated expiration: 2039-03-06
Also published as: CN109828684A

Abstract

The present invention discloses an electronic pen, which comprises a metal pen tube, a conductive pen core and a circuit board. The conductive pen core and the circuit board are both arranged in the metal pen tube and are both insulated from the metal pen tube. The pen tip of the conductive pen core extends outward from the front end of the metal pen tube. The conductive pen core is electrically connected to the signal generating circuit of the circuit board as a signal transmitting antenna. The electronic pen uses the metal pen tube for signal shielding, which will effectively reduce the interference of the outside world on the signal sent by the electronic pen, thereby improving the signal strength; on the other hand, the pen core uses a conductive pen core to improve the overall conductivity of the pen core, which can further improve the signal strength when the conductive pen core is used as an antenna for signal transmission.

Description

Electronic pen

Technical Field

The invention relates to the technical field of electronic pens, in particular to a structural design of an electronic pen.

Background

With the development of electronic pen technology, users can write on the screen of an electronic device using an electronic pen to directly store and transmit electronic documents of written contents, such as electronic signatures through the electronic pen, and can also perform mouse-like operations through the electronic pen, such as sending signals to the electronic device by operating keys of the electronic pen, so that the electronic device performs function settings and the like matched with the operations in response to the signals.

When the user performs mouse-like operation through the electronic pen, the greater the suspension height (namely the effective operation distance relative to the electronic equipment) of the electronic pen is, the better, so that the user can control the electronic equipment through the electronic pen when a certain distance is kept from the electronic equipment, and the use flexibility is improved. However, the weaker the signal intensity of the electronic pen sensed by the electronic device is in the process of being far away from the electronic device, the electronic pen cannot be mutually sensed with the electronic device when being far away from the electronic device by a certain distance, so that in order to enable the electronic pen to have a better suspension height, the technical scheme capable of improving the signal intensity of the signal sent by the electronic pen is very necessary.

Disclosure of Invention

The embodiment of the invention aims to provide an electronic pen so as to improve the signal strength of a signal sent by the electronic pen.

According to a first aspect of the present invention, there is provided an electronic pen comprising a metallic pen barrel, a conductive pen core and a circuit board, the conductive pen core and the circuit board being both disposed in the metallic pen barrel and both disposed in insulation with the metallic pen barrel, a pen tip portion of the conductive pen core protruding outward from a front end of the metallic pen barrel, the conductive pen core being electrically connected as a signal transmitting antenna to a signal generating circuit of the circuit board.

Optionally, the electronic pen further comprises a spring, the spring is sleeved on the conductive pen core, and the conductive pen core is electrically connected with the signal generation circuit through the spring.

Optionally, the conductive pen core is provided with a first insulation sleeve at the pen point part, and the conductive pen core is arranged in an insulation manner with the metal pen tube through the first insulation sleeve.

Optionally, the thickness of the first insulating sleeve on the central line of the conductive pen core is less than or equal to 1mm.

Optionally, the first insulating sleeve is provided with a through hole which enables the covered part of the conductive pen core to be communicated with the inner cavity of the metal pen tube.

Optionally, the conductive pen core includes a first conductive portion and a second conductive portion, one end of the first conductive portion is located at the pen tip portion, the other end of the first conductive portion is electrically connected with the second conductive portion, and the first insulating sleeve is wrapped on the first conductive portion.

Optionally, the other end of the first conductive part is electrically connected with the second conductive part through a threaded matching structure.

Optionally, the electronic pen further comprises an insulating support installed in the metal pen tube, the second conductive part is located in the insulating support, and the conductive pen core is further arranged in an insulating mode with the metal pen tube through the insulating support.

Optionally, an upper limit structure is formed between the second conductive part and the insulating support, wherein the upper limit structure is used for limiting an upper limit position of the refill moving towards the front end of the pen tube.

Optionally, the first conductive portion includes a head portion, a neck portion, a main body portion and a tail portion that are sequentially received, wherein the neck portion is contracted inwards in a radial direction of the first conductive portion with respect to the head portion, the main body portion is expanded outwards in the radial direction with respect to the neck portion, the tail portion is expanded outwards in the radial direction with respect to the main body portion, the head portion and a part of the neck portion are located at the pen point portion, and the tail portion is electrically connected with the second conductive portion at the other end of the first conductive portion.

Optionally, the electronic pen further comprises a pressure sensor, the pressure sensor is arranged on the circuit board, a force bearing surface of the pressure sensor faces the force application end of the conductive pen refill, the conductive pen refill is provided with a second insulating sleeve at the force application end, and the force application end and the pen point part are arranged at two ends of the conductive pen refill.

Optionally, the pen point part of the conductive pen refill is provided with a step surface, the step surface is opposite to the end surface of the front end of the metal pen tube and is provided with a gap, the step surface and the end surface of the front end form a lower limit structure, and the lower limit structure is used for limiting the movement of the pen refill towards the lower limit position of the pressure sensor.

The electronic pen has the advantages that the metal pen tube is adopted for signal shielding, so that interference of the outside on signals sent by the electronic pen is effectively reduced, and further, the signal strength is improved, on the other hand, the conductive pen core is adopted for the pen core, the overall conductivity of the pen core can be improved, and the signal strength can be further improved when the conductive pen core is used as an antenna for signal transmission.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic cross-sectional structural view of an electronic pen according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the electronic pen of FIG. 1 with a barrel removed;

FIG. 3 is a schematic perspective view of a first conductive portion and a first insulating sleeve covering the first conductive portion of the electronic pen of FIG. 1;

FIG. 4 is a schematic view of an external structure of a first conductive portion and a first insulating sleeve covering the first conductive portion of the electronic pen of FIG. 1;

FIG. 5 is a schematic perspective view of an electronic pen with a barrel removed according to another embodiment of the present invention;

FIG. 6 is a schematic view of a partial enlarged structure of FIG. 5;

fig. 7 is a schematic cross-sectional structure of an electronic pen according to another embodiment of the present invention.

Reference numerals illustrate:

1-pen tube, 11-end face;

2-refill, 21-first insulating sleeve;

211-through holes, 22-second insulating sleeves;

23-first conductive portions 231-heads;

232-neck portion, 233-body portion;

234-tail portion, 24-second conductive portion;

241-step surface, 25-pen tip;

26-force application end 251-step surface;

3-main support, 31-step surface;

a 32-mounting groove, a 4-pressure sensor;

41-stress surface, 5-circuit board;

51-first circuit board, 52-second circuit board;

6-adjusting mechanism, 61-adjusting block;

62-a transmission pair 621-an adjusting seat;

622-adjusting screw, 6221-adjusting head;

6222-screw portion, 7-spring;

8-buffer block and 9-sleeve;

2_9-mating surfaces.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

< Structure of electronic Pen >

The embodiment of the invention provides an electronic pen for a user to write on electronic equipment. The electronic pen comprises a pen tube, a pen core, a pressure sensor and a circuit board, wherein the pen core, the pressure sensor and the circuit board are all arranged in the pen tube, the pen core can have a set displacement amount which moves along the axis direction of the pen core (or the length direction of the pen tube) relative to the pen tube, and the pressure sensor and the circuit board are fixedly arranged on the pen tube.

The pen tip of the pen refill extends outwards from the front end of the pen tube so as to write through the pen tip.

The force-bearing surface of the pressure sensor faces the force-applying end of the pen core, and the force-applying end and the pen tip are respectively arranged at two ends of the pen core in the length direction of the pen tube.

When a user writes on the screen of the electronic equipment by using the electronic pen, pressure is applied to the pen core through the screen, and the pen core generates tiny displacement moving towards the pressure sensor under the action of the pressure, so that the force application end of the pen core can transmit the pressure to the stress surface of the pressure sensor, and the pressure sensor can output an electric signal representing the pressure value of the pressure.

The circuit board of the electronic pen has a processor, e.g. an MCU, a signal generating circuit, etc. The signal output end of the pressure sensor is electrically connected with the corresponding connecting end of the circuit board, the pressure sensor outputs an electric signal representing the pressure value to the processor through the connecting end so that the processor can obtain the current pressure value according to the electric signal, the signal generating circuit is controlled to generate a signal carrying the pressure value, the signal is sent to the electronic equipment matched with the electronic pen through the pen core (used as an antenna), and the electronic equipment is provided with the signal receiving circuit matched with the signal generating circuit, so that the electronic equipment can obtain the current pressure value by analyzing the received signal, and corresponding writing and displaying can be carried out according to the current pressure value.

In one embodiment, the pressure sensor may be soldered directly to the circuit board, i.e. to the corresponding connection end of the circuit board.

In one embodiment, the pressure sensor may also be electrically connected to, e.g., plugged onto, a corresponding connection end of the circuit board by wires, flat cables, or the like.

The electronic pen may be any type of electronic pen having an electronic writing function, such as a capacitive pen and an electromagnetic pen, and is not limited herein.

For such an electronic pen, according to one aspect of the present invention, there is proposed a structural design for controlling an idle stroke of the electronic pen, for which, referring to fig. 1 and 2, and fig. 5 and 6, the electronic pen includes a pen barrel 1, a pen core 2, a pressure sensor 4, and an adjusting mechanism 6, each of the pen core 2, the pressure sensor 4, and the adjusting mechanism 6 being mounted in the pen barrel 1 with a pen tip 25 of the pen core 2 protruding outward from a front end of the pen barrel 1, the pressure sensor 4 being located between the pen core 2 and the adjusting mechanism 6 in a length direction of the pen barrel 1 with a force receiving surface 41 of the pressure sensor 4 facing a force applying end 26 of the pen core 2, the adjusting mechanism 6 being provided for adjusting the idle stroke between the force receiving surface 41 and the force applying end 26.

The above idle stroke means that, in order for the pressure sensor to sense the value of the pressure applied to the pen tip 25, the minimum displacement amount by which the pen core 2 is required to be pressed toward the pressure sensor 4, that is, the pressure applied to the pen tip 25 by which the force application end 26 of the pen core 2 is moved toward the pressure sensor 4 in an unused free state is required for the pressure sensor to detect the value of the applied pressure.

For the electronic pen, an idle stroke must be reserved in structural design to ensure that the pressure sensor has no output when the electronic pen is in an unused free state. However, excessive idle travel may result in the pressure sensor failing to sense the small pressure applied, which in turn may result in reduced sensitivity of the pressure sensor. Therefore, it is very necessary to control the size of the idle stroke, but in practice, because of machining errors of parts of the electronic pen, assembly errors exist in the assembly of the electronic pen, and the errors cannot be avoided or monitored, so that the existing electronic pen is in an uncontrollable idle stroke state, and uneven quality of the electronic pen occurs.

According to the electronic pen structure, an operator can control the idle stroke within a set range through the adjusting mechanism when assembling and/or checking the electronic pen, so that the electronic pen structure is beneficial to forming a standard for restraining the idle stroke, and the outgoing electronic pen has a uniform quality standard.

In addition, for the electronic pen of this embodiment, through setting up adjustment mechanism and adjusting the idle running, can reduce the idle running as far as possible, reduce the sense of collapsing when writing, improve pressure sensor's sensitivity, improve and write experience.

The adjustment of the idle stroke by the adjusting mechanism can be performed in a semi-finished state of the electronic pen, wherein the semi-finished state has completed the assembly of all functional components, and the writing function of the electronic pen can be realized, but at least the pen tube 1 is not assembled yet, so that the assembling personnel can conveniently adjust the idle stroke by operating the adjusting mechanism 6. After the adjustment of the idle stroke is completed, the assembler can further complete the subsequent assembly, such as the installation of the pen tube 1, etc., to obtain the finished product of the electronic pen.

Example 1]

Fig. 1 and 2 show structural designs of an electronic pen according to an embodiment of the present invention.

In this embodiment, the electronic pen may include a main stand 3, and the main stand 3 is disposed in the pen holder 1 for mounting various parts of the electronic pen.

In this embodiment, the main support 3 may have a mounting groove 32 in which the pressure sensor 4 and the adjustment mechanism 6 are mounted, and the cartridge 2 is mounted in the main support 3, wherein the tip 25 of the cartridge 2 is located outside the main support 3, the force application end 26 of the cartridge 2 is located inside the main support 3, and the force application end 26 of the cartridge 2 protrudes into the mounting groove 32. The structure can be used for positioning the pressure sensor 4 and the regulating mechanism 6 in the pen tube 1 through the mounting groove 32, and is beneficial to quickly and accurately completing the assembly of the pressure sensor 4, the regulating mechanism 6 and the like in the pen tube 1.

In this embodiment, the electronic pen may further include a buffer block 8, the buffer block 8 being disposed in the mounting groove 32, and the buffer block 8 being provided for restricting the degree of freedom of movement of the pressure sensor 4. The limiting effect of the buffer block 8 is represented by the fact that, on the one hand, the adjusting mechanism 6 is provided with an adjustment amount for performing the idle stroke adjustment by itself having the characteristic of being elastically deformable, and on the other hand, the pressure sensor 4 can be limited to an adjusted position for determining the idle stroke between the force receiving surface of the pressure sensor 4 and the force applying end 26 of the pen core 2 after the adjustment of the position of the pressure sensor 4 in the longitudinal direction of the pen tube 1 is completed by the adjusting mechanism 6.

In this embodiment, the buffer block 8 and the adjusting mechanism 6 may be separately disposed on two sides of the pressure sensor 4 in the length direction of the pen tube 1, and the adjusting mechanism 6 may control the pressure sensor 4 to squeeze the buffer block 8 or release the buffer block 8 in the adjusting process to realize the adjustment of the idle stroke.

The cushion block 8 may be, for example, a pad made of a material capable of elastic deformation, such as a silica gel pad or a rubber pad.

In this embodiment, the electronic pen may include a spring 7, the spring 7 being fitted over the cartridge 2 and configured to apply a restoring force to the cartridge 2 toward the front end of the pen barrel 1. This means that when the cartridge 2 is pressed, the cartridge 2 needs to be pushed against the restoring force exerted by the spring 7 to move toward the pressure sensor 4, so that the force exerted by the cartridge 2 is transmitted to the force-receiving surface 41 of the pressure sensor 4 through the force-applying end 26 of the cartridge 2, and when the force applied is released, the cartridge 2 can be restored under the restoring force exerted by the spring 7, and the idle stroke reserved between the force-receiving surface 41 and the force-applying end 26 of the pressure sensor 4 can be restored quickly and reliably. In this embodiment, the position of the pen core 2 can be controlled more precisely by providing the spring 7.

Further, the cartridge 2 is located in the main support 3 and forms an upper limit structure with the main support 3, wherein the upper limit structure is arranged to define the idle stroke together with the adjustment mechanism 6. Here, the upper limit structure is used for limiting the upper limit of the position of the refill 2 after the refill is reset under the action of the reset force applied by the spring 7, that is, for limiting the movement of the refill 2 toward the front end of the pen tube 1, so that the upper limit structure and the adjusting mechanism 6 together realize the constraint of the idle stroke.

As shown in fig. 1 and 2, the upper limit structure is formed by the pen core 2 forming a stepped surface 241 facing the pen tip 25 and a stepped surface 31 facing the urging end 26 formed by the main support 3. When the cartridge 2 is reset, the stepped surface 241 of the cartridge is abutted against the stepped surface 31 of the main holder 3, and the cartridge 2 is restricted to a position where the stepped surface 241 is abutted against the stepped surface 31.

In this embodiment, as shown in fig. 1 and 2, the electronic pen further includes a circuit board 5, the pressure sensor 4 is welded on the circuit board 5, and the adjusting mechanism 6 acts on the pressure sensor 4 through the circuit board 5 to realize adjustment of the idle stroke. This means that the pressure sensor 4 is of integral construction with the circuit board 5, that the adjusting mechanism 6 is in direct contact with the circuit board 5 and that a concomitant adjustment of the positions of the circuit board 5 and the pressure sensor 4 is achieved by interaction with the circuit board 5.

In this embodiment, the circuit board 5 may be a flexible circuit board (Flexible Printed Circuit, FPC), and further, the electronic pen may further include a fixing member (not shown in the figure) provided on a surface of the circuit board 5 that acts with the adjustment mechanism 6. This means that the adjusting mechanism 6 is in direct contact with the fixing member, which effectively protects the circuit board 5 from damage.

The fixing piece can be a steel sheet or made of other materials which are not easy to deform.

The fixing member should be arranged to be insulated from the circuit board 5, for example, the insulation may be directly realized by an insulating substrate of the circuit board 5, and for example, a fixing member made of an insulating material may be also used.

In this embodiment, the circuit board 5 may further include a first circuit board 51 and a second circuit board 52 that are connected to each other, the pressure sensor 4 is welded on the first circuit board 51, and the first circuit board 51 and the second circuit board 52 may be separately disposed on two sides of the adjusting mechanism 6 in the length direction of the pen tube 1. The structure can effectively utilize the larger installation space of the electronic pen in the length direction of the pen tube 1, and improves the compactness of structural design.

The above first circuit board 51 is mainly used for soldering the pressure sensor 4, and the second circuit board 52 is used for providing other functional circuits of the electronic pen, for example, other functional circuits include a processor, a signal generating circuit, a key circuit, and the like, wherein the pressure sensor 4, the signal generating circuit, and the key circuit are all connected with the processor.

In one example, the first circuit board 51 is disposed orthogonal to the second circuit board 52, for example, the first circuit board 51 is disposed perpendicular to the length direction of the pen holder 1, such that the force-bearing surface 41 of the pressure sensor 4 faces the force-applying end 26 of the pen core 2, and the second circuit board 52 is disposed parallel to the length direction of the pen holder 1. Vice versa.

In one example, the circuit board 5 is a flexible circuit board, and the first circuit board 51 and the second circuit board 52 may be directly connected by wiring of the flexible circuit board itself, that is, in this example, the circuit board 5 is a monolithic circuit board, and only the first circuit board 51 located on one side of the adjustment mechanism 6 and the second circuit board 52 located on the other side of the adjustment mechanism 6 are formed by bending the circuit board 5.

In one example, the first circuit board 51 and the second circuit board 52 may be electrically connected by wires or a flat cable.

In one example, where the circuit board 5 is a flexible circuit board, the electronic pen may be provided with two fixing members, one provided on the surface of the first circuit board 51 that acts with the adjustment mechanism 6 and the other provided on the surface of the second circuit board 52 to fix and protect the second circuit board 52.

In this embodiment, as shown in fig. 1 and 2, the adjusting mechanism 6 may be an adjusting block 61, the adjusting block 61 is a standard member similar to a standard weight, and has a measuring function, specifically, a dimension measuring function, and the adjusting block 61 is provided with a mark for identifying the dimension (hereinafter referred to as thickness in the example) of the adjusting block in the length direction of the pen tube 1, and the mark may take any form as long as the adjusting block of different dimensions can be distinguished, and is not limited herein.

In one example, the indicia may be a specific thickness dimension value.

In one example, the indicia may also be a color that represents a thickness dimension value, e.g., different sized adjustment blocks have different colors.

In one example, the indicia may also be a number representing a thickness dimension value, such as a total of 6 gauge adjustment blocks numbered sequentially from 1 to 6, the larger the number, the larger the thickness dimension, etc. The thickness dimension mentioned above is the distance dimension of the adjusting block in the length direction of the pen tube 1, and of course, the width dimension, the height dimension, etc. can also be used for description.

In this embodiment, the principle of adjusting the idle stroke by the adjusting block 61 is that the adjusting block is selected to ensure that the electronic pen will not output a pressure signal when in an unstressed state, so as to avoid water leakage, and the pen core of the electronic pen only needs to move by a minimum displacement amount after stress to output the pressure signal to improve the sensitivity of the electronic pen. The step of adjusting the idle stroke using the adjustment block 61 may include:

Step 1, selecting an adjusting block 61 _j with the size level of j to adjust the idle stroke, detecting whether the electronic pen leaks, if so, executing step 2, and if not, executing step 3. In this embodiment, the adjusting block 61 _j represents an adjusting block with a size level j, where j is a natural number from 1 to M, M represents a highest size level, 1 represents a lowest size level, and j may be any one of 1 to M in the operation of adjusting the idle stroke, which is not limited herein.

The water leakage is a situation in which handwriting information appears on the screen of the electronic device when the electronic pen is brought close to the screen of the electronic device (at this time, the screen does not apply pressure to the pen tip 25) to write.

The water-tight state means that the electronic pen can not output a pressure signal in an unstressed state, namely, handwriting information can not appear on the screen of the electronic device when the electronic pen is close to the screen of the electronic device for writing at the moment.

In this embodiment, the minimum size level of the adjustment block 61 ₁ does not normally allow the electronic pen to leak water. A set of adjustment blocks can be designed with a large size class range so that the set of adjustment blocks can meet the adjustment requirements of all electronic pens. In addition, a plurality of electronic pens can be used for tests to design a proper adjusting block with the lowest size level and an adjusting block with the highest size level, so that the idle stroke adjusting efficiency of the electronic pens is improved.

Step 2, if the electronic pen leaks, the next-size-level (one-level smaller) adjusting block 61 _j-1 is replaced to adjust the idle stroke, whether the electronic pen leaks or not is detected, if the electronic pen does not leak, the idle stroke of the electronic pen is limited by the adjusting block 61 _j-1, the idle stroke is adjusted, if the electronic pen leaks, the next-size-level adjusting block 61 _j-2 is replaced continuously to adjust the idle stroke, whether the electronic pen leaks or not is detected, and the applicable adjusting block 61 is selected by analogy.

Step 3, if the electronic pen is watertight and j=m, that is, the adjusting block 61 _j is the adjusting block 61 _M with the highest size level, determining to limit the idle stroke of the electronic pen by using the adjusting block 61 _j, and completing the adjustment of the idle stroke. If the electronic pen is watertight and j < M, the adjusting block 61 _j+1 of the previous size level is replaced to adjust the idle stroke, whether the electronic pen leaks or not is detected, if the adjusting block 61 _j+1 leaks, the idle stroke of the electronic pen is limited by the adjusting block 61 _j, the idle stroke is adjusted, if the adjusting block 61 _j+1 does not leak, the adjusting block 61 _j+2 of the previous size level is replaced to adjust the idle stroke, whether the electronic pen leaks or not is detected, and the applicable adjusting block 61 is selected by analogy.

According to the above steps, in the present embodiment, the criteria for selecting the adjustment block 61 is that the adjustment block 61 is selected such that the electronic pen is watertight and the adjustment block 61 of the previous size level causes the electronic pen to leak, so that the idle stroke can be reduced as much as possible and limited within the set range.

In practical application, the idle stroke adjustment can be performed from the adjustment block with the highest size level, or from the adjustment block with the lowest size level. In addition, since the consistency of the same batch of parts is relatively good, after several trials, the range of the size level of the applicable adjusting block 61 can be determined, so that the water leakage detection can be started by selecting one size level adjusting block from the range, for example, the water leakage detection can be started from the adjusting block 61 _M-2, and the efficiency of adjusting the idle stroke by the adjusting block 61 can be improved.

Further, based on the adjusting mechanism of the present embodiment using the adjusting blocks 61, the embodiment of the present invention provides an idle stroke adjusting system, which includes an electronic pen having the adjusting blocks 61, an electronic device adapted to the electronic pen, and a set of adjusting blocks 61, wherein the set of adjusting blocks 61 includes a plurality of adjusting blocks 61 having different thickness dimensions, and each adjusting block 61 is marked with a corresponding dimension mark. The adjusting block 61 used in the electronic pen for limiting the idle stroke is one adjusting block 61 selected from a group of adjusting blocks 61, wherein the selected adjusting block 61 enables the electronic pen (particularly the pen tip 25 of the electronic pen) not to output a pressure signal in an unstressed state and further not to leave handwriting information on the electronic equipment, namely the electronic pen is watertight, and the adjusting block 61 of the last thickness level of the selected adjusting block 61 enables the electronic pen to generate handwriting information on the electronic equipment in the unstressed state, namely the electronic pen has a water leakage phenomenon.

Example 2]

Fig. 5 and 6 show structural designs of an electronic pen according to another embodiment of the present invention.

The main difference between this embodiment and embodiment 1 described above is that the adjustment mechanism 6 is implemented using a transmission pair 62.

The driving pair 62 may be a screw-nut driving pair, the driving pair 62 may include an adjusting seat 621 and an adjusting screw 622, the adjusting seat 621 is fixedly installed in the pen tube 1, the adjusting screw 622 includes an adjusting head portion 6221 and a screw portion 6222 connected with the adjusting head portion 6221, wherein the screw portion 6222 has an external thread, the adjusting seat 621 has an internal thread matching with the external thread of the screw portion 6222, the adjusting screw 622 is connected with the adjusting seat 621 by the screw portion 6222 in a threaded fit manner, the screw portion 6222 of the adjusting screw 622 protrudes outwards from one side of the adjusting seat 621 facing the pressure sensor 4, the pressure sensor 4 is supported on the screw portion 6222, that is, the pressure sensor 4 contacts with an end face of the screw portion 6222, and the adjusting head portion 6221 of the adjusting screw 622 is located on one side of the adjusting seat 621 facing away from the pressure sensor 4, that is, the ends of the adjusting head portion 6221 and the screw portion 6222 are respectively located on two sides of the adjusting seat 621 in a length direction of the pen tube 1, in such a manner that the length of the adjusting head portion 6222 can be controlled by rotating the adjusting head portion 6222 on one side of the adjusting seat 621 facing away from the pressure sensor 4, so that the length of the end of the adjusting head portion 6222 can protrude from the end of the adjusting seat 21 facing the pressure sensor 4, thereby realizing a force-applying end of the pressure sensor 2.

In this embodiment, the adjustment seat 621 may be fixedly mounted in the mounting groove 32 of the main bracket 3, and the adjustment head 6221 of the adjustment screw 622 is located outside the mounting groove 32 to facilitate the adjustment of the idle stroke by rotating the adjustment screw 622.

In this embodiment, the other structural designs of the electronic pen can be seen in the above embodiment 1, and will not be described herein.

In this embodiment, the adjusting step of adjusting the idle stroke by the transmission pair 62 may include:

Step 1, in the semi-finished state of the electronic pen, the adjusting screw 622 is rotated to an initial position, wherein the initial position is a position where the screw portion 6222 of the adjusting screw 622 protrudes outwards from the adjusting seat 621 to the longest, at this time, the adjusting head portion 6221 of the adjusting screw 622 abuts against the adjusting seat 621 on the side of the adjusting seat 621 facing away from the pressure sensor 4, and cannot rotate in a direction of protruding the screw portion 6222 further outwards relative to the adjusting seat 621, but can only rotate in a direction of retracting the screw portion 6222 inwards relative to the adjusting seat 621, wherein during the process of retracting the screw portion 6222 inwards relative to the adjusting seat 621, the tail end of the screw portion 6222 moves in a direction gradually approaching to the adjusting seat 621.

Step 2, detecting whether the electronic pen leaks water or not when the adjusting screw 622 is located at the initial position, if not, determining that the adjustment of the idle stroke is completed, that is, the idle stroke after the adjustment is the idle stroke defined by the adjusting screw 622 at the initial position.

Step 3, if the adjusting screw 622 is at the initial position, the adjusting head 6221 is rotated to enable the screw 6222 to retract inwards by one step distance relative to the adjusting seat 621, at the moment, whether the electronic pen leaks or not is detected, if the electronic pen does not leak, the adjustment of the idle stroke is determined to be completed, if the electronic pen leaks, the adjusting head 6221 is continuously rotated to enable the screw 6222 to retract inwards by one step distance relative to the adjusting seat 621, whether the electronic pen leaks or not is detected, and the final adjusting position of the adjusting screw 622 is determined by pushing the electronic pen. That is, the standard of adjusting the adjusting screw 622 is that the electronic pen is watertight when the adjusting screw 622 is located at the final adjusting position and watertight when the adjusting screw 622 is located at the last adjusting position, so that the idle stroke can be reduced as much as possible and limited within the set range.

In the above adjustment operation, the length of the pitch of each adjustment may be set as required, for example, a pitch equal to a pitch of the screw portion 6222 or the like may be set, and for example, a pitch equal to the amount of linear displacement generated by the screw portion 6222 by the adjustment head portion 6221 being rotated one half turn or one turn may be set.

Example 3 ]

According to another aspect of the invention, a structural design is also proposed that protects the pressure sensor 4 from being damaged by the cartridge 2.

In this embodiment, as shown in fig. 1 to 4, the nib 25 of the pen core 2 may have a stepped surface 251, which stepped surface 251 is opposite to the end surface 11 of the front end of the pen barrel 1, and has a gap, that is, a gap is provided between the stepped surface 251 and the end surface 11 in the unstressed free state of the pen core 2, and the stepped surface 251 and the end surface 11 of the pen barrel 1 form a lower limit structure, wherein the lower limit structure is set as a lower limit position for limiting the movement of the pen core 2 toward the pressure sensor 4, that is, when the pen core 2 moves toward the pressure sensor 4 to the lower limit position, the stepped surface 251 of the nib 25 abuts on the end surface 11, so that the pen core 2 cannot move further toward the pressure sensor 4.

In this embodiment, by forming a lower limit structure between the nib 25 and the end face 11 of the pen barrel 1, the movement of the pen core 2 toward the lower limit position of the pressure sensor 4 can be limited, and the pressure sensor 4 can be effectively protected from damage. In the case where the force receiving surface 41 of the pressure sensor 4 has the maximum displacement amount of the pressing motion, the lower limit should be such that the displacement amount of the force receiving surface 41 is smaller than the maximum displacement amount.

In addition, since the pen core 2 can share a part of the pressure when moving toward the pressure sensor 4 to the lower limit position, the pressure transmitted to the force receiving surface 41 of the pressure sensor 4 through the force application end 26 can be reduced, and thus, when the pen core 2 is subjected to an instantaneous excessive pressure, for example, when the electronic pen falls down to make the pen tip 25 bear a large pressure applied on the ground, the pressure sensor 4 can be effectively protected from being damaged by the instantaneous excessive pressure.

Example 4 ]

According to a third aspect of the present invention, a structural design is further provided for improving the signal strength of a signal sent to an electronic device, so as to obtain a better suspension height.

In this embodiment, referring to fig. 1 to 4, the pen tube 1 is a metal pen tube, the pen core 2 is a conductive pen core, both the pen core 2 and the circuit board 5 are insulated from the pen tube 1, and the pen core 2 is electrically connected with the signal generating circuit of the circuit board 5 as a signal transmitting antenna.

In this embodiment, on one hand, the pen tube 1 adopts a metal pen tube to play a role in shielding signals, which effectively reduces interference of the outside on signals output by the signal generating circuit, and further improves signal strength, and on the other hand, the pen core 2 adopts a conductive pen core to improve the conductivity of the pen core 2, which can also improve signal strength.

Through the functions of the two aspects, the electronic pen of the embodiment can obtain a better suspension height by improving the signal intensity, wherein the suspension height reflects the farthest distance that the electronic pen can interact with the electronic device, and when the distance between the electronic pen and the electronic device exceeds the farthest distance, the electronic device cannot accurately receive and recognize the signal. The higher the signal strength of the signal sent by the electronic pen, the higher will be the levitation height.

Because the electronic pen of this embodiment has a better suspension height, therefore, the user can operate the electronic pen within a certain range from the electronic device, at this time, the electronic device can also accurately receive the signal sent by the electronic pen and respond to the signal, for example, the user operates the key of the electronic pen within a certain range, and the electronic device can perform the function setting matched with the key operation.

In one example, the circuit board 5 includes a first circuit board 51 and a second circuit board 52, and the signal generating circuit may be provided on the second circuit board 52, but a connection point for electrically connecting the signal generating circuit with the cartridge 2 is formed on the first circuit board 51 provided adjacent to the cartridge 2 to facilitate the electrical connection.

In this embodiment, the electronic pen may further include a spring 7, the spring 7 is sleeved on the pen core 2, and the pen core 2 is electrically connected with the signal generating circuit through the spring 7. For example, one end of the spring 7 may be soldered to a connection point of the signal generating circuit, and the other end of the spring 7 may be connected to the cartridge 2, so that the spring 7 is reliably connected to the signal generating circuit and the cartridge 2. For another example, one end of the spring 7 may be soldered to a connection point of the signal generating circuit, and the spring 7 may be sleeved on the pen core 2 to achieve electrical contact, that is, contact-type electrical connection may be adopted between the spring 7 and the pen core 2.

In this embodiment, the spring 7 may also be provided for applying a restoring force to the cartridge 2 toward the front end of the barrel 1.

In this embodiment, the pen core 2 is provided with a first insulating sleeve 21 at the pen tip 25, and the pen core 2 is insulated from the pen tube 1 by the first insulating sleeve 21. The first insulating bush 21 is made of, for example, insulating rubber.

In one example, the thickness of the first insulating sleeve 21 on the center line of the cartridge 2 is less than or equal to 1mm, i.e., the thickness is the linear distance of the nib 25 formed by the first insulating sleeve 21 to the conductor of the cartridge 2 on the center line of the cartridge 2. By limiting this thickness, it is possible to ensure that the signal strength of the signal transmitted via the cartridge 2 is substantially unaffected by the first insulating sleeve 21.

In this embodiment, the first insulating sleeve 21 is provided with a through hole 211 that allows the covered portion of the cartridge 2 to communicate with the inner cavity of the barrel 1. By providing the through hole 211, the resistance of mounting the first insulating bush 21 can be reduced, and the mounting efficiency can be improved.

In this embodiment, the pen core 2 may further include a first conductive portion 23 and a second conductive portion 24, one end of the first conductive portion 23 is located at the pen tip 25, the other end of the first conductive portion 23 is electrically connected to the second conductive portion 24, and the first insulating sleeve 21 is wrapped on the first conductive portion 23. The sectional structure is beneficial to reducing the processing difficulty and improving the overall processing precision of the pen refill 2.

In this embodiment, the other end of the first conductive portion 23 and the second conductive portion 24 may be electrically connected by a screw-fit structure. For example, the other end of the first conductive portion 23 has an external thread, the second conductive portion 24 is provided with an internal thread that is adapted, and an assembler can screw the first conductive portion 23 into the second conductive portion 24 to complete the connection therebetween.

In another embodiment, the first conductive portion 23 and the second conductive portion 24 may be electrically connected by a clamping structure, a soldering structure, or the like, which is not limited herein.

In this embodiment, the electronic pen may further include a main support 3 mounted in the pen holder 1, where the main support 3 is an insulating support, and the second conductive portion 24 is located in the insulating support, and the pen core 2 is further insulated from the pen holder 1 by the insulating support.

In this embodiment, components such as the circuit board 5 may also be mounted in the main support 3 to achieve an insulating arrangement with the pen holder 1.

In this embodiment, an upper limit structure may be formed between the second conductive part 24 and the main support 3, wherein the upper limit structure is provided as an upper limit position for limiting the movement of the cartridge 2 toward the front end of the pen barrel 1.

As shown in fig. 1 and 2, the upper limit structure is formed by the pen core 2 forming a stepped surface 241 facing the pen tip 25 and a stepped surface 31 facing the urging end 26 formed by the main support 3. When the refill 2 is moved up and reset, the stepped surface 241 of the refill is abutted against the stepped surface 31 of the main holder 3, and the refill 2 is restricted to an upper limit position where the stepped surface 241 is abutted against the stepped surface 31.

In this embodiment, as shown in fig. 4, the first conductive portion 23 may include a head 231, a neck 232, a body 233 and a tail 234 which are sequentially received, wherein the neck 232 is contracted inward in a radial direction of the first conductive portion 23 with respect to the head 231, the body 233 is expanded outward in a radial direction with respect to the neck 232, the tail 234 is expanded outward in a radial direction with respect to the body 233, the head 231 and a part of the neck 232 are located at the pen tip 25, and the tail 234 is electrically connected to the second conductive portion 234 as the other end of the first conductive portion 23. With such a structure of the first conductive portion 23, reliable positioning of the first insulating portion 21 can be achieved by dimensional changes of the head portion 231, the neck portion 232, and the body portion 233 in the radial direction of the first conductive portion 23, and reliable electrical connection with the second conductive portion 24 can be achieved by the tail portion 234.

In this embodiment, the electronic pen further includes a pressure sensor 4, the pressure sensor 4 is disposed on the circuit board 5, and a force bearing surface 41 of the pressure sensor 4 faces a force application end 26 of the pen core 2, the pen core 2 is provided with a second insulating sleeve 22 at the force application end 26, wherein the force application end 26 and the pen tip 25 are disposed at two ends of the pen core 2. In this embodiment, the second insulating sleeve 22 can realize insulation between the pen core 2 and the pressure sensor 4, so as to avoid the problem of short circuit between the two.

In one example, the above first and second electric conductors 23 and 24 may be made of stainless steel SUS304 or brass H59 or the like.

In one example, the above first and second insulating jackets 21 and 22 may be made of POM (plastic steel), PA66 (nylon), TPEE, TPU, or the like.

Example 5 ]

According to the fourth aspect of the invention, a structural design capable of reducing the shaking of the pen core under the condition of effectively controlling the water-out force is also provided.

Referring to fig. 7, in this embodiment, the electronic pen includes a pen barrel 1, a sleeve 9, a pen core 2 and a pressure sensor 4, wherein the sleeve 9, the pen core 2 and the pressure sensor 4 are all installed in the pen barrel 1, the sleeve 9 is fixedly disposed relative to the pen barrel 1, the pen core 2 passes through the sleeve 9 in the interior of the pen barrel 1 and is slidably matched with the sleeve 9 in the length direction of the pen barrel 1, wherein the matched surfaces 2_9 of the sliding fit are all metal surfaces, and the matched surfaces 2_9 include the outer surface of the matched portion of the pen core 2 and the inner surface of the sleeve 9.

In one example, the sleeve 9 may be integrally made of metal.

In one example, the sleeve 9 may also include a sleeve body and a metal coating applied to an inner surface of the sleeve body to form a slip fit mating surface 2_9 with the metal coating.

In one example, at least one of the mating portions of the cartridge 2 is made of metal.

In one example, the outer surface of the mating portion of the cartridge 2 and the inner surface of the sleeve 9 may have a hardness difference therebetween to further improve the smoothness of the sliding fit.

In this embodiment, the pen core 2 has a pen tip 25 and an urging end 26 for urging pressure to the pressure sensor 4, the sleeve 9 is located between the pen tip 25 and the urging end 26, the pen tip 25 protrudes outward from the front end of the pen barrel 1, and the urging end 26 faces the urging surface 41 of the pressure sensor 4.

In this embodiment, since the sleeve 9 is disposed in the pen tube 1 and is in sliding fit with the pen core 2, the electronic pen can effectively limit the movement gap of the pen core 2 in the radial direction of the electronic pen through the sleeve 9, so as to improve the straightness of the movement of the pen core 2 in the axial direction of the electronic pen. Meanwhile, the matched surface 2_9 forming sliding fit is a metal surface, so that the matched surface 2_9 has good hardness and smoothness, and therefore, the coaxiality of the pen core 2 and the sleeve 9 can be guaranteed to be high, the friction force between the sleeve 9 and the pen core 2 can be effectively controlled, and further, the pen core 2 still has small pressure loss in the pressure transmission process, and the control of water discharge force is realized.

The water-out force is the minimum pressure value formed between the electronic pen and the screen of the electronic equipment for realizing writing, and the smaller the water-out force is, the better the water-out force is, which means that the higher the sensitivity of the electronic pen is, and in the field of electronic pens, the water-out force is usually required to be controlled to be 5-10g. According to the embodiment, the sleeve 9 is arranged to be in sliding fit with the pen core 2, so that bilateral shaking amount can be limited to 0.01-0.03mm, which is greatly improved compared with the existing electronic pen, meanwhile, the sliding fit is realized by utilizing the metal surface, the water outlet gram force of the electronic pen is basically not influenced, and the water outlet gram force can still be controlled within the range of 5-10g.

In this embodiment, the electronic pen may further include a main support 3 fixedly installed in the pen barrel 1, the above sleeve 9, the pen core 2 and the pressure sensor 4 are installed in the main support 3, and the sleeve 9 is fixedly connected with the main support 3 to be fixedly disposed with respect to the pen barrel 1.

In one example, the main support 3 and the sleeve 9 may be separately formed, and the sleeve 9 is fixedly mounted on a set portion of the main support 3, which may implement a fixed connection between the sleeve 9 and the main support 3 by, for example, interference fit, adhesion, or the like.

In one example, the sleeve 9 can also be fixedly connected to the main carrier 3 by means of a structure which is injection-molded as an insert. In this case, the sleeve 9 can be shaped first and then the sleeve 9 can be placed as an insert in a mold for injection molding the main support 3, so that a fixed connection between the two can be achieved.

In one example, the pen tube 1 may be a metal pen tube, the pen core 2 may be a conductive pen core, the electronic pen further comprises a circuit board 5, the pressure sensor 4 is welded on the circuit board 5, the pen core 2, the circuit board 4 and the sleeve 9 are all arranged in an insulating manner with the pen tube 1, and the pen core 2 is electrically connected with a signal generating circuit of the circuit board 5 as a signal transmitting antenna. For example, referring to the above embodiment 4, the cartridge 2 is electrically connected to the signal generating circuit of the circuit board 5 through the spring 7.

In this example, the pen core 1 may be provided with a first insulating sleeve 21 at the pen tip 25, and the pen core 2 is insulated from the pen barrel 1 by the first insulating sleeve 21.

In this example, the cartridge 1 may be provided with a second insulating sleeve 22 at the force application end 26.

In this example, the sleeve 9 and the circuit board 5 may each be provided insulated from the pen holder 1 by the main support 3.

In one example, the pen core 1 may include a first conductive part 23 and a second conductive part 24, a first end of the first conductive part 23 is located at the pen tip 25, a first end of the second conductive part 24 is located at the force application end 26, a second end of the first conductive part 23 is electrically connected to a second end of the second conductive part 24, the pen core 3 is provided with a first insulating sleeve 21 at the pen tip 25, and the sleeve 9 may be slidably engaged with the first conductive part 23.

In one example, an upper limit structure may be formed between the second conductive part 24 and the main support 3, wherein the upper limit structure is provided as an upper limit position for limiting the movement of the cartridge 2 toward the front end of the pen barrel 1. In this example, the upper limit structure may be formed by the pen core 2 forming a stepped surface 241 facing the pen tip 25 and a stepped surface 31 facing the urging end 26 formed by the main support 3. In this case, the lower surface of the sleeve 9 facing the second conductive portion 24 may be flush with the step surface 31, or may be recessed in the direction of the front end of the pen holder 1 with respect to the step surface 31.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are mutually referred to, and each embodiment is mainly described as different from other embodiments, and the embodiments can be used alone or in combination with each other as required. For example, one skilled in the art may combine any two or any multiple of embodiments 1, 3,4, and 5 to design an electronic pen, or will

Any two or any plurality of embodiments of embodiment 2, embodiment 3, embodiment 4, and embodiment 5 are combined to design an electronic pen or the like, and are not limited herein.

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An electronic pen, characterized in that it comprises a metal pen tube, a conductive pen core and a circuit board, wherein the conductive pen core and the circuit board are both arranged in the metal pen tube and are both insulated from the metal pen tube, the pen tip of the conductive pen core extends outward from the front end of the metal pen tube, and the conductive pen core is electrically connected to the signal generating circuit of the circuit board as a signal transmitting antenna; the electronic pen further comprises a pressure sensor and an adjusting mechanism, wherein the pressure sensor is located between the conductive pen core and the adjusting mechanism in the length direction of the metal pen tube, and the force-bearing surface of the pressure sensor faces the force-applying end of the conductive pen core, and the adjusting mechanism comprises a transmission The transmission pair comprises an adjusting seat and an adjusting screw, the adjusting seat is fixedly installed in the pen tube, the adjusting screw comprises an adjusting head and a screw portion connected to the adjusting head, the adjusting screw is threadedly connected to the adjusting seat through the screw portion, and the screw portion of the adjusting screw extends outward from a side of the adjusting seat facing the pressure sensor, the pressure sensor is supported on the screw portion, the adjusting head of the adjusting screw is located on a side of the adjusting seat facing away from the pressure sensor, and the adjusting mechanism is configured to control the length of the screw portion extending outward from the adjusting seat through the adjusting head, so as to adjust the idle stroke between the force-bearing surface and the force-applying end.

2 . The electronic pen according to claim 1 , further comprising a spring, wherein the spring is sleeved on the conductive pen core, and the conductive pen core is electrically connected to the signal generating circuit via the spring.

3 . The electronic pen according to claim 1 , wherein the conductive pen core is provided with a first insulating sleeve at the pen tip, and the conductive pen core is insulated from the metal pen tube by the first insulating sleeve.

4 . The electronic pen according to claim 3 , wherein a thickness of the first insulating sleeve on the center line of the conductive pen core is less than or equal to 1 mm.

5 . The electronic pen according to claim 3 , wherein the first insulating sleeve is provided with a through hole that allows the covered portion of the conductive pen core to communicate with the inner cavity of the metal pen tube.

6. The electronic pen according to claim 3, characterized in that the conductive pen core comprises a first conductive part and a second conductive part, one end of the first conductive part is located at the pen tip, the other end of the first conductive part is electrically connected to the second conductive part, and the first insulating sleeve is covered on the first conductive part.

7 . The electronic pen according to claim 6 , wherein the other end of the first conductive part is electrically connected to the second conductive part through a threaded fitting structure.

8. The electronic pen according to claim 6, characterized in that the electronic pen also includes an insulating bracket installed in the metal pen tube, the second conductive part is located in the insulating bracket, and the conductive pen core is also insulated from the metal pen tube by the insulating bracket.

9 . The electronic pen according to claim 8 , characterized in that an upper limit structure is formed between the second conductive part and the insulating bracket, wherein the upper limit structure is used to limit the upper limit position of the pen core moving toward the front end of the pen tube.

10. The electronic pen according to claim 6 is characterized in that the first conductive part includes a head, a neck, a main body and a tail connected in sequence, wherein the neck shrinks inwardly relative to the head in a radial direction of the first conductive part, the main body expands outwardly relative to the neck in the radial direction, the tail expands outwardly relative to the main body in the radial direction, the head and part of the neck are located at the pen tip, and the tail is electrically connected to the second conductive part at the other end of the first conductive part.

11. The electronic pen according to claim 1 is characterized in that the pen tip of the conductive pen core has a step surface, the step surface is opposite to the end surface of the front end of the metal pen tube, and has a gap, the step surface and the end surface of the front end form a lower limit structure, wherein the lower limit structure is used to limit the lower limit position of the pen core moving toward the pressure sensor.