An electromagnetic pen

Abstract

This application specifically relates to an electromagnetic pen, comprising: a pen tip, a magnetic core sleeve, and a magnetic core; the pen tip includes a contact portion and an opening portion, the contact portion being in contact with a contact surface, and the opening portion being connected to the magnetic core sleeve; one end of the magnetic core sleeve is connected to the opening portion to form a receiving cavity, and the other end is in contact with a movable component, causing the movable component to move along the moving direction of the magnetic core sleeve; the magnetic core includes a sensing end and a tail end, the magnetic core extending within the receiving cavity, and the sensing end extending towards the contact portion to a predetermined distance. The electromagnetic pen proposed in this application extends the magnetic core towards the contact portion to a predetermined distance. By reducing the distance between the magnetic core and the contact portion, the sensing sensitivity when the magnetic core interacts with the touch panel can be improved, thereby enhancing the ease of operation and sensitivity of the electromagnetic pen.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, specifically to an electromagnetic pen. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Currently, with the development and widespread application of electromagnetic pens, users have new demands for the appearance, writing accuracy, and sensitivity of electromagnetic pens. Due to the size limitations of the internal core component magnetic coil, most electromagnetic pens on the market have placed the magnetic core in the pen barrel position, which is far from the pen tip. This affects the writing accuracy and sensitivity of electromagnetic pens and results in a relatively simple shape and structure of the pen tip, which cannot meet users' needs for the shape and structure of the magnetic core. Utility Model Content

[0004] The purpose of this application is to at least solve the technical problem of poor sensitivity in existing electromagnetic pens, and this purpose is achieved through the following technical solution: This application provides an electromagnetic pen, including: a pen tip, a magnetic core sleeve, and a magnetic core; the pen tip includes a contact portion and an opening portion, the contact portion being in contact with a contact surface, and the opening portion being connected to the magnetic core sleeve; the magnetic core sleeve has one end connected to the opening portion to form a receiving cavity, and the other end in contact with a movable member, causing the movable member to move along the moving direction of the magnetic core sleeve; the magnetic core includes a sensing end and a tail end, the magnetic core extending within the receiving cavity, and the sensing end extending toward the contact portion to a predetermined distance.

[0005] Those skilled in the art will understand that the electromagnetic pen proposed in this application extends the magnetic core toward the contact portion of the pen tip to a preset distance. By reducing the distance between the magnetic core and the contact portion, the signal sensing sensitivity of the magnetic core can be improved, thereby enhancing the ease of operation and sensitivity of the electromagnetic pen.

[0006] Specifically, this application improves the writing accuracy and sensitivity of the electromagnetic pen by moving the sensing end of the magnetic core forward toward the contact portion of the pen tip, thereby shortening the distance between the sensing end of the magnetic core and the contact portion, and thus reducing the sensing distance between the sensing end of the magnetic core and the touch panel. Furthermore, the magnetic core is protected by the cavity formed by the magnetic core sleeve and the pen tip, improving the drop resistance of the electromagnetic pen. The drop resistance can be further improved by incorporating soft silicone or silicone-based drop-resistant adhesive inside the magnetic core sleeve.

[0007] In some embodiments, the pen tip is configured as a conical structure, and the inner diameter of the pen tip gradually increases along the extension direction from the contact portion to the opening portion.

[0008] In some embodiments, the preset distance is less than or equal to 4 mm.

[0009] In some embodiments, one end of the magnetic core sleeve is connected to the opening of the pen tip by a thread.

[0010] In some embodiments, the movable element includes a pressure-sensitive bracket, one end of which is connected to a magnetic core sleeve, and the other end of which is provided with a pressure-sensitive component. The magnetic core sleeve is configured to trigger the pressure-sensitive component during movement via the pressure-sensitive bracket.

[0011] In some embodiments, a push rod is provided at one end of the magnetic core sleeve that contacts the movable part. The push rod is configured to pass through the pressure-sensitive bracket and contact the pressure-sensitive component.

[0012] In some embodiments, the movable element includes a push pin disposed on a circuit board, a pressure-sensitive component disposed on the circuit board, and a magnetic core sleeve configured to trigger the pressure-sensitive component during movement via the push pin.

[0013] In some embodiments, the electromagnetic pen further includes a housing, the outer surface of which is flush with the outer surface of the pen tip, the housing being used to enclose at least a portion of the magnetic core sleeve and moving parts.

[0014] In some embodiments, the magnetic core includes a magnetic core rod and an induction coil, with at least a portion of the magnetic core rod disposed in the receiving cavity and extending toward the contact portion, and the induction coil wound around the outer surface of the magnetic core rod and extending toward the contact portion. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the structure of an electromagnetic pen according to one embodiment; Figure 2 A cross-sectional view of an electromagnetic pen according to one embodiment; Figure 3 A schematic diagram of the disassembled structure of an electromagnetic pen according to one embodiment; Figure 4 A cross-sectional view of an electromagnetic pen according to another embodiment; Figure 5 This is a schematic diagram of the disassembled structure of an electromagnetic pen according to another embodiment.

[0016] The accompanying figure is labeled as follows: 100. Electromagnetic pen; 10. Shell; 20. Pen tip; 201. Contact part; 202. Opening part; 30. Magnetic core; 301. Induction end; 302. Tail end; 31. Magnetic core rod; 32. Induction coil; 33. Induction wire; 34. Extension section; 40. Push rod; 50. Magnetic core sleeve; 501. Receiving cavity; 60. Pressure-sensitive bracket; 70. Pressure-sensitive components; 80. Elastic elements; 90. Circuit board; 91. Ejector pin; 92. Tail pad; 93. Side pad. Detailed Implementation

[0017] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0018] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also mean including the plural forms. The terms “comprising,” “including,” and “having” are inclusive and therefore indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0019] Although terms such as "first," "second," etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Furthermore, in the description of this application, unless otherwise expressly specified and limited, the terms "set up" and "connected" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection or an indirect connection via an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0020] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "end," "length," "inner," "outer," etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation, in addition to those depicted in the figure. For example, if the mechanism in the figure is flipped, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The mechanism may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0021] In existing electromagnetic pens, the magnetic core interacts with the touch panel via electromagnetic induction signals to locate the writing position, pressure, and rotation angle of the pen tip on the touch panel. However, the pen tip space of existing electromagnetic pens is small, and the radial dimension of the electromagnetic induction coil is large. This results in the electromagnetic induction coil being placed at a distance from the pen tip. When the distance between the electromagnetic induction coil and the pen tip is large, it affects the accuracy and consistency of the electromagnetic induction signal interaction, thus affecting the writing accuracy, sensitivity, and sensing height of the electromagnetic pen. Consequently, the electromagnetic pen may experience problems such as sluggish sensing and inaccurate writing trajectory positioning during use.

[0022] This application addresses the problems of poor writing sensitivity, inconsistent writing, and low sensing height caused by the large distance between the magnetic core and the pen tip in existing electromagnetic pens. It proposes an electromagnetic pen that improves the writing sensitivity, accuracy, and sensing height by improving the shape of the pen tip to increase the internal space of the pen tip and extending the magnetic core towards the pen tip to a shorter distance, thereby reducing the distance between the magnetic core and the pen tip.

[0023] like Figures 1 to 5 As shown, the electromagnetic pen provided in this embodiment includes a pen tip 20, a magnetic core sleeve 50, and a magnetic core 30. The pen tip 20 includes a contact portion 201 and an opening portion 202. The contact portion 201 contacts the contact surface of the touch panel, and the opening portion 202 is connected to the magnetic core sleeve 50. One end of the magnetic core sleeve 50 is connected to the opening portion 202 to form a receiving cavity 501, and the other end contacts a movable member, causing the movable member to move along the moving direction of the magnetic core sleeve 50. The magnetic core 30 includes a sensing end 301 and a tail end 302. The magnetic core 30 extends within the receiving cavity 501, and the sensing end 301 extends toward the contact portion 201 to a preset distance.

[0024] In this embodiment, the electromagnetic pen proposed in this application has a pen tip 20 with a large accommodating space to accommodate the sensing end 301 of the magnetic core 30. When the magnetic core 30 extends toward the contact portion 201, the sensing end 301 can extend to a preset distance to reduce the distance between the sensing end 301 and the contact portion 201, thereby reducing the distance between the sensing end 301 and the contact surface of the touch panel, so as to improve the sensing sensitivity when the magnetic core 30 interacts with the touch panel, thereby improving the ease of operation and sensitivity of the electromagnetic pen.

[0025] Specifically, by moving the magnetic core 30 forward toward the contact portion 201 by a predetermined distance, this application can effectively improve the writing accuracy and sensitivity of the electromagnetic pen. Furthermore, the receiving cavity formed by the magnetic core sleeve 50 and the pen tip 20 provides a protective space for the magnetic core 30, improving the electromagnetic pen's drop resistance. The drop resistance can be further improved by placing soft silicone or silicone-based drop-resistant adhesive inside the receiving cavity.

[0026] It should be noted that the embodiments of this application do not limit the specific shape and material of the magnetic core 30, because the improvement of this application lies in improving the shape of the pen tip 20 so that the pen tip 20 has a larger accommodating space, allowing the distance between the sensing end 301 of the magnetic core 30 and the contact part 201 to be within a preset distance when the pen tip 20 is extended. By greatly shortening the distance between the sensing end 301 and the contact part 201, the signal interaction accuracy between the magnetic core 30 and the touch panel is improved.

[0027] The embodiments of this application are described in detail below.

[0028] like Figures 1 to 3 As shown, in some embodiments, the electromagnetic pen 100 includes a housing 10 and a pen tip 20. The pen tip 20 is connected to the magnetic core sleeve 50 to form a receiving cavity 501. The magnetic core 30 is formed by winding an induction coil 32 around the outer surface of the magnetic core rod 31. At least a portion of the magnetic core 30 is disposed in the receiving cavity 501 and extends toward the contact portion 201 of the pen tip 20. The end of the magnetic core 30 extending toward the contact portion 201 is the sensing end 301 of the magnetic core 30. The sensing end 301 extends toward the contact portion 201 to a preset distance.

[0029] In this embodiment, the electromagnetic pen proposed in this application improves the shape of the pen tip 20 and enlarges the internal cavity 501 of the pen tip 20 to allow the magnetic core 30 to extend towards the contact portion 201 of the pen tip 20 within the cavity 501 of the pen tip 20. By reducing the distance between the sensing end 301 of the magnetic core 30 and the contact portion 201 to a preset distance, the sensing sensitivity of the interaction signal between the sensing magnetic core 30 and the touch panel is improved, thereby improving the ease of operation and sensitivity of the electromagnetic pen.

[0030] Furthermore, the preset distance mentioned in this embodiment refers to the distance between the sensing end 301 of the magnetic core 30 and the contact portion 201, which is less than or equal to 4mm. In this embodiment, the distance between the end of the sensing end 301 of the magnetic core 30 and the contact portion 201 is less than 4mm, and can reach 1mm or even less than 1mm. The selection of this distance depends on the application scenario requirements of the electromagnetic pen for sensing sensitivity. Compared with the prior art, where the distance between the sensing end of the magnetic core and the pen tip is a relatively large distance of more than 4mm, the electromagnetic pen provided in this embodiment has a pen tip 20 with a cone-shaped structure similar to a pencil tip, which increases its internal space. This allows the sensing end 301 of the magnetic core 30 to approach the contact portion 201 of the pen tip 20 to the maximum extent, thereby reducing the distance between the sensing end 301 and the contact surface when the contact portion contacts the contact surface.

[0031] like Figures 1 to 3 As shown, in some embodiments, the pen tip 20 is configured as a conical structure, and the inner diameter of the pen tip 20 gradually increases along the extension direction from the contact portion 201 to the opening portion 202.

[0032] In this embodiment, the pen tip 20 is configured as a cone structure, with the end that contacts the touch panel being the contact portion 201 and the other end being the opening portion 202. The inner diameter of the pen tip 20 gradually increases along the extension direction from the contact portion 201 to the opening portion 202. The contact portion 201 of the pen tip forms a closed structure, and the opening portion 202 is an open portion for connection with the magnetic core sleeve 50. The gradual increase in the inner diameter of the pen tip 20 along the extension direction from the contact portion 201 to the opening portion 202 results in a cone-shaped pen tip structure. Due to the structural size limitations of the magnetic core assembly, the electromagnetic pen 100 in the prior art cannot use a tapered pen tip design. The pen tip 20 proposed in this embodiment, by rationally arranging the position of the magnetic core 30, can reduce the overall radial dimension of the magnetic core 30, thereby enabling the pen tip 20 to use a tapered pen tip structural design.

[0033] like Figures 1 to 3 As shown, in some embodiments, the preset distance is less than or equal to 4 mm.

[0034] In this embodiment, the magnetic core 30 is disposed within the receiving cavity 501 formed by the pen tip 20 and the magnetic core sleeve 50. The tail end 302 of the magnetic core 30 is fixed to the end of the magnetic core sleeve 50 away from the opening 202 of the pen tip 20. The sensing end 301 of the magnetic core 30 extends towards the contact portion 201 of the pen tip 20 to a preset distance from the contact portion 201, which is less than or equal to 4 mm. By incorporating the receiving space of the pen tip 20 as part of the receiving cavity 501, the distance between the magnetic core 30 and the contact portion 201 can be reduced from approximately 4 mm to approximately 3 mm, 2 mm, or even 1 mm. This reduces the distance between the sensing end 301 and the contact panel, improving the writing accuracy and sensitivity of the electromagnetic pen and increasing its sensing height.

[0035] like Figures 1 to 3 As shown, in some embodiments, one end of the magnetic core sleeve 50 is connected to the opening 202 by a thread.

[0036] In this embodiment, the magnetic core sleeve 50 is configured to be threadedly connected to the pen tip 20. The pen tip 20 and the magnetic core sleeve 50 are detachably connected, and the cavity 501 formed by the two accommodates the magnetic core 30. This configuration can improve the maintenance convenience of the pen tip and facilitate the replacement of the magnetic core 30.

[0037] like Figures 1 to 3 As shown, in some embodiments, the movable component includes a pressure-sensitive bracket 60, one end of which is connected to the magnetic core sleeve 50, and the other end is provided with a pressure-sensitive component 70. The magnetic core sleeve 50 is configured to trigger the pressure-sensitive component 70 during movement via the pressure-sensitive bracket 60.

[0038] In this embodiment, the magnetic core 30 is fixed in the receiving cavity 501 formed by the magnetic core sleeve 50 and the pen tip 20. The pen tip 20 and the magnetic core sleeve 50 are detachably connected. The magnetic core sleeve 50 is provided with a connecting part, such as a buckle, that connects to the pressure-sensitive bracket 60. The buckle allows the magnetic core sleeve 50 to move backward (away from the pen tip 20), thereby transmitting the writing pressure of the pen tip to the pressure-sensitive component 70 to form a pressure-sensitive signal.

[0039] The above connection method forms a first assembly structure: the pressure-sensitive component 70 and the pressure-sensitive support 60 form a second assembly structure; the pen tip 20, the magnetic core 30, and the magnetic core sleeve 50 form a third assembly structure. The first and second assembly structures are connected by a snap-fit ​​on the magnetic core sleeve 50, and circumferential anti-rotation is achieved through the internal structure. During writing, the second assembly structure moves back and forth, triggering the pressure-sensitive component 70 to generate a pressure signal.

[0040] like Figures 1 to 3As shown, in some embodiments, a push rod 40 is provided at the end of the magnetic core sleeve 50 that contacts the movable part. The push rod 40 is configured to extend into the pressure-sensitive bracket 60 and contact the pressure-sensitive assembly 70.

[0041] In this embodiment, a push rod 40 is provided at the tail end of the magnetic core sleeve 50. The push rod 40 is inserted into the pressure-sensitive component 70 through the pressure-sensitive bracket 60 and connected to the pressure-sensitive component 70. During the writing process, the magnetic core sleeve 50 drives the push rod 40 to move back and forth, and transmits the external pressure of the pen tip 20 to the pressure-sensitive component 70 through the push rod 40 to form a pressure-sensitive signal, thereby transmitting the writing signal of the pen tip 20 to the pressure-sensitive component 70 to generate a pressure-sensitive signal.

[0042] Furthermore, the magnetic core sleeve 50 is also provided with a through hole, through which two induction lines 33 extending from the induction coil 32 are connected to the circuit board 90 of the electromagnetic pen 100. Specifically, two induction lines 33 are provided on the magnetic core, and these two induction lines 33 pass through the through hole provided on the magnetic core sleeve 50 and are connected to the circuit board 90. The circuit board 90 couples energy to the magnetic core 30 through the induction lines, providing working energy for the magnetic core 30.

[0043] Specifically, the tail end of the induction coil 32 is soldered with two induction lines 33 to two symmetrically positioned side pads 93 on the magnetic core sleeve 50. The tail pad 92 of the magnetic core sleeve 50 is aligned with two connectors soldered on the circuit board 90, maintaining a certain gap. During the writing process, the magnetic core sleeve 50 extends and retracts, causing the tail pad 92 to contact the circuit board 90 through the connectors to generate a conduction signal. The tail end of the magnetic core sleeve 50 is inserted into the pressure-sensitive component 70, thereby transmitting the writing action signal of the pen tip to the circuit board 90 to generate a conduction signal, and transmitting the writing action signal of the pen tip to the pressure-sensitive component 70 to generate a pressure-sensitive signal.

[0044] Specifically, the side pad 93 and the tail pad 92 of the magnetic core sleeve 50 are conductive. The conductive connection between the side pad 93 and the tail pad 92 can be achieved by laser forming technology or by embedding a metal part in the magnetic core sleeve 50.

[0045] like Figures 4 to 5 As shown, in some embodiments, the movable component is a pin 91, which is disposed on a circuit board 90. A pressure-sensitive component 70 is disposed on the circuit board 90, and the magnetic core sleeve 50 is configured to trigger the pressure-sensitive component 70 during movement via the pin 91.

[0046] In this embodiment, the ejector pin 91 is configured to slide along the circuit board 90 and connect to the circuit board 90. Since the ejector pin 91 has a certain structural strength, it can transmit the writing action of the contact part 201 to the circuit board 90 for processing to generate a pressure-sensitive signal, thereby reducing the signal distortion phenomenon between the contact part 201 and the circuit board 90.

[0047] Furthermore, the ejector pin 91 proposed in this application embodiment can also be connected by other feasible structures, such as springs or custom sheet metal parts, and these structures are all within the protection scope of this application embodiment.

[0048] like Figures 4 to 5 As shown, in some embodiments, the pen tip 20 includes a conical cylindrical portion and a sleeve portion connected to each other. A contact portion 201 is disposed at the tip of the conical cylindrical portion, and a tail opening is located at the end of the sleeve portion. A magnetic core sleeve 50 is connected to the tail opening of the contact portion 201. A magnetic core 30 is fixed in the receiving cavity 501 formed by the magnetic core sleeve 50 and the pen tip 20. One end, namely the tail end 302, is fixed to the end of the magnetic core sleeve 50 away from the pen tip 20, and the other end, namely the sensing end 301, extends toward the contact portion 201 of the pen tip 20 to a preset distance.

[0049] In this embodiment, as Figure 4 As shown in the embodiment of this application, an electromagnetic pen is provided. The induction coil 32 is wound on the magnetic core rod 31 to form a magnetic core 30. The magnetic core 30 is assembled in the receiving cavity 501 formed by the pen tip 20 and the magnetic core sleeve 50. The magnetic core 30, the pen tip 20 and the magnetic core sleeve 50 form an integral assembly structure. With this configuration, the integral assembly structure can be quickly replaced.

[0050] like Figure 2 , Figure 4 As shown in the embodiments of this application, two implementations of the pen tip of the electromagnetic pen are provided. Figure 2 The pen tip shown Figure 4 The difference in the pen tips shown is that the length of the magnetic core sleeve 50 is different. Figure 2 In the illustrated embodiment, the magnetic core sleeve 50 is longer, and the pen tip 20 is shorter. While... Figure 4 In the illustrated embodiment, the magnetic core sleeve 50 is relatively short, and the cone-shaped structure of the pen tip 20 has an extension 34 extending towards the tail end of the magnetic core 30, which is connected to the magnetic core sleeve 50. In both implementations, the pen tip 20 and the magnetic core sleeve 50 are connected to form a receiving cavity to accommodate the magnetic core 30. The internal receiving space of the pen tip 20 is part of the receiving cavity 501, allowing for a smaller distance between the magnetic core 30 and the front end of the pen tip. This improves the accuracy, sensitivity, and sensing height of the resonant circuit formed by the magnetic core when interacting with the touch panel.

[0051] It should be noted that the structural design of the pen tip 20 is not limited to the content shown in this embodiment. As long as the magnetic core sleeve 50 can be connected to the pen tip, and the internal accommodating space of the pen tip 20 becomes part of the accommodating cavity 501 formed by the connection of the magnetic core sleeve 50 and the pen tip 20, so that the distance between the sensing end 301 of the magnetic core 30 and the front end of the pen tip 20 is reduced to the smallest possible distance, such a structural design is within the scope of protection of this application.

[0052] This application embodiment provides that the magnetic core 30 of the electromagnetic pen moves forward to the contact portion 201 by a preset distance, thereby reducing the distance between the sensing end 301 of the magnetic core 30 and the contact portion 201, thereby improving the sensing sensitivity of the magnetic core 30 when interacting with the touch panel, thus improving the operation convenience and sensitivity of the electromagnetic pen, and at the same time, it can also improve the drop resistance of the electromagnetic pen.

[0053] like Figures 1 to 5 As shown, in some embodiments, the pen tip also includes a housing 10, the outer surface of which is flush with the outer surface of the pen tip 20, and the housing 10 is used to enclose at least a portion of the magnetic core sleeve 50 and the movable part.

[0054] In this embodiment, the interior of the housing 10 has a receiving space for accommodating the electrical components of the electromagnetic pen 100. The pen tip 20 is disposed at the front end of the housing 10 and can cooperate with the electrical components by sliding relative to the housing 10.

[0055] Furthermore, the electromagnetic pen 100 also includes an elastic element 80 disposed within the housing 10. The elastic element 80 can reset the pressure-sensitive component 70 and the pen tip 20 when the pen tip loses external force. Specifically, the pen tip 20 triggers the pressure-sensitive component 70 under the action of external writing pressure. After the external writing pressure disappears, the elastic element 80 resets the pressure-sensitive component 70 and the pen tip 20 to their original state, thereby enabling the writing pressure of the pen tip 20 to be transmitted to the pressure-sensitive component 70 in real time.

[0056] In addition, the elastic element 80 can also apply a certain damping force to the external writing force, thereby sensing different writing forces, thus improving the user's writing experience and reducing the phenomenon of misoperation of the pen tip under the action of external writing force.

[0057] Furthermore, the embodiments of this application only focus on the structures in the electromagnetic pen 100 that are related to the improvements of this application, and do not mean that the electromagnetic pen 100 does not have other structures. For example, the electromagnetic pen 100 also includes some signal sensing elements disposed inside the electromagnetic pen 100. These structures are all within the protection scope of the embodiments of this application, and will not be described one by one here.

[0058] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electromagnetic pen, characterized in that, The electromagnetic pen includes: a pen tip (20), a magnetic core sleeve (50), and a magnetic core (30); the pen tip (20) includes a contact portion (201) and an opening portion (202), the contact portion (201) is in contact with a contact surface, and the opening portion (202) is connected to the magnetic core sleeve (50); The magnetic core sleeve (50) has one end connected to the opening (202) to form a receiving cavity (501), and the other end contacts the movable part, causing the movable part to move along the moving direction of the magnetic core sleeve (50). The magnetic core (30) includes a sensing end (301) and a tail end (302). The magnetic core (30) extends within the receiving cavity (501), and the sensing end (301) extends toward the contact portion (201) to a predetermined distance.

2. The electromagnetic pen according to claim 1, characterized in that, The pen tip (20) is configured as a cone structure, and the inner diameter of the pen tip (20) gradually increases along the extension direction from the contact portion (201) to the opening portion (202).

3. The electromagnetic pen according to claim 1, characterized in that, The preset distance is less than or equal to 4mm.

4. The electromagnetic pen according to claim 1, characterized in that, One end of the magnetic core sleeve (50) is connected to the opening (202) by a thread.

5. The electromagnetic pen according to claim 1, characterized in that, The movable component includes a pressure-sensitive bracket (60), one end of which is connected to the magnetic core sleeve (50), and the other end is provided with a pressure-sensitive component (70). The magnetic core sleeve (50) is configured to trigger the pressure-sensitive component (70) during movement via the pressure-sensitive bracket (60).

6. The electromagnetic pen according to claim 5, characterized in that, A push rod (40) is provided at one end of the magnetic core sleeve (50) that contacts the movable part. The push rod (40) is configured to pass through the pressure-sensitive bracket (60) and contact the pressure-sensitive assembly (70).

7. The electromagnetic pen according to claim 1, characterized in that, The movable component is a pin (91), which is disposed on a circuit board (90). A pressure-sensitive component (70) is disposed on the circuit board (90), and the magnetic core sleeve (50) is configured to trigger the pressure-sensitive component (70) during the movement of the pin (91).

8. The electromagnetic pen according to claim 1, characterized in that, The electromagnetic pen also includes a housing (10), the outer surface of which is flush with the outer surface of the pen tip (20), and the housing (10) is used to enclose at least part of the magnetic core sleeve (50) and the movable part.

9. The electromagnetic pen according to any one of claims 1 to 8, characterized in that, The magnetic core (30) includes a magnetic core rod (31) and an induction coil (32). At least a portion of the magnetic core rod (31) is disposed in the receiving cavity (501) and extends toward the contact portion (201). The induction coil (32) is wound around the outer surface of the magnetic core rod (31) and extends toward the contact portion (201).

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