Pen holder, pen core assembly, electronic pen and electronic device

Abstract

The present application provides a pen barrel, a refill assembly, an electronic pen, and an electronic device. The pen barrel is applied to the electronic pen, and the electronic pen further includes a refill assembly. A receiving cavity is provided inside the pen barrel. The receiving cavity has a first port for the tip of the refill assembly to penetrate through. A part of the refill assembly is located inside the receiving cavity. A first limiting structure is provided on the inner wall of the pen barrel, and the first limiting structure is used to cooperate with a second limiting structure on the refill assembly to limit the movement range of the refill assembly relative to the pen barrel. Wherein, in the axial direction of the pen barrel, the distance between the first limiting structure and the first port is greater than or equal to 1 / 2 of the length of the pen barrel. The pen barrel, the refill assembly, the electronic pen, and the electronic device provided by the present application can reduce the risk of the pen barrel cracking.

Description

Technical Field

[0001] This application relates to the field of handwriting input, and particularly to a pen barrel, a pen core assembly, an electronic pen, and an electronic device. Background Art

[0002] The touch screen allows users to directly operate the content on the screen through fingers or other touch tools (such as electronic pens like styluses and writing pens), improving the convenience and intuitiveness of operation. The electronic pen has a smaller contact area than a finger and can achieve higher precision and accuracy, so it is widely used. However, in winter or other usage environments with lower temperatures, the pen barrel of the current electronic pen is prone to cracking. Summary of the Invention

[0003] This application provides a pen barrel, a pen core assembly, an electronic pen, and an electronic device, which improves the problem that the existing pen barrel is prone to cracking.

[0004] To achieve the above object, this application adopts the following technical solutions:

[0005] In a first aspect, a pen barrel is provided. This pen barrel is applied to an electronic pen, and the electronic pen further includes a pen core assembly. A receiving cavity is provided inside the pen barrel. The receiving cavity has a first port and a second port that are oppositely arranged, and the opening area of the first port is smaller than the opening area of the second port. A part of the pen core assembly is located inside the receiving cavity. A first limiting structure is provided on the inner wall of the pen barrel, and the first limiting structure is used to cooperate with a second limiting structure on the pen core assembly to limit the moving range of the pen core assembly relative to the pen barrel. Among them, in the axial direction of the pen barrel, the distance between the first limiting structure and the first port is greater than or equal to 1 / 2 of the length of the pen barrel.

[0006] In this embodiment, the first limiting structure and the second limiting structure are used to replace the limiting structure on the current electronic pen. In the axial direction of the pen barrel, the distance between the first limiting structure 7 and the first port is greater than or equal to 1 / 2 of the length of the pen barrel. At this time, if the contraction of each area of the pen barrel is the same, only half or less than half of the area of the pen barrel near the second port will have the axial contraction force converted into the pushing force of the first step structure on the second step structure, reducing the above-mentioned pushing force by more than half, thereby reducing the risk of the pen barrel cracking. In addition, when designing the pen barrel, it can also be designed as a structure that shrinks from both ends to the middle by adjusting materials, structures, etc., that is, the middle area of the pen barrel is set as its thermal expansion center area. In this way, the distance between the first limiting structure and the first port is greater than or equal to / of the length of the pen barrel, which can make both ends of the pen barrel shrink towards the middle of the pen barrel, causing the first limiting structure and the second limiting structure to separate, or the first limiting structure to drive the second limiting structure to move towards the middle area of the pen barrel, without the first limiting structure exerting a pushing force on the second limiting structure, further reducing the risk of the pen barrel cracking.

[0007] It can be seen that by using this electronic pen, compared with using the electronic pen provided in the previous embodiment, by increasing the distance between the first limiting structure and the first port, and at the same time, the part of the pen barrel between the first limiting structure and the first port is in clearance fit with the refill assembly, when the pen barrel expands and contracts due to heat, it is not easy to collide with the refill assembly, or when the two have a hard collision, the force between them is relatively small, so as to reduce the risk of the pen barrel cracking.

[0008] In some embodiments, the distance between the first limiting structure and the first port is greater than or equal to 3 / 4 of the length of the pen barrel. In this way, compared with the distance between the first limiting structure and the first port being between 1 / 2 of the length of the pen barrel and 3 / 4 of the length of the pen barrel, the distance between the first limiting structure and the first port can be further increased, reducing the risk of the pen barrel cracking. In addition, the electronic pen provided in this embodiment has a simple solution, high feasibility, low cost, and has no impact on the writing function and use experience of the electronic pen.

[0009] In some embodiments, the first limiting structure includes a first limiting surface facing the second port, and the first limiting surface is substantially parallel to the radial direction of the pen barrel. The first limiting surface is used for abutting and cooperating with the second limiting structure. In this way, compared with the solution of using the first step structure and the second step structure for limiting, the setting method of the limiting structure can be unchanged, and the position of the refill and the pen barrel can be limited without adding new structural parts. In this way, the first limiting structure can be obtained by adjusting the shape or position of some molds (the above operation is also called mold repair and incorporation), so that no new manufacturing cost is added, or the newly added manufacturing cost is relatively low, making the manufacturing cost of the electronic pen relatively low and facilitating the adjustment of the existing production line.

[0010] In some embodiments, the end surface of the pen barrel near the second port forms the first limiting structure. In this way, the first limiting structure can be naturally formed by means of the original structure on the pen barrel without additional setting, making the structure of the electronic pen simple, highly feasible, without any additional cost or relatively low additional cost required, low manufacturing cost, and easy to install, and can be directly applied to the existing electronic pen.

[0011] In some embodiments, the end of the pen barrel corresponding to the first port is provided with a necking structure, and a first guiding structure is formed on the inner wall of the necking structure. The first guiding structure is used for sliding contact with the refill assembly during the process of thermal expansion and contraction of the pen barrel. The setting of the first guiding structure can enable the pen barrel to have sliding contact with the refill rather than hard collision even when they come into contact during the process of thermal expansion and contraction, so as to reduce the force between the two and reduce the risk of the pen barrel cracking.

[0012] In a second aspect, a refill assembly is provided. The refill assembly is applied to an electronic pen, and the electronic pen further comprises the pen holder provided in each of the above-mentioned embodiments. Part of the refill assembly is located within the accommodating cavity. The refill assembly comprises a main body and a second limiting structure. The second limiting structure is connected to the main body, and at least a portion of the second limiting structure protrudes from the side wall of the main body to form a first protrusion. The first protrusion is used to cooperate with the first limiting structure to limit the range of movement of the main body relative to the pen holder. The effect of the second aspect is consistent with that of the first aspect and will not be repeated here.

[0013] In some embodiments, the first protrusion has a second limiting surface, the second limiting surface is arranged toward the tip of the refill assembly, and the second limiting surface is approximately perpendicular to the length direction of the refill assembly, that is, approximately parallel to the radial direction of the pen barrel. The second limiting surface is used to abut and cooperate with the first limiting structure. Compared with the solution of using the first step structure and the second step structure for limiting, the setting method of the limiting structure can be unchanged, and no new structural parts are added to achieve the position limitation of the refill and the pen barrel. In this way, the second limiting structure can be obtained by adjusting the shape or position of part of the mold (the above operation is also called mold repair and merging). In this way, no new production cost is added, or the newly added production cost is low, so that the production cost of the electronic pen is low, which is convenient for adjusting the existing production line.

[0014] In some embodiments, the main body includes a refill body, and the second retaining structure is located on the refill body. With the electronic pen provided in this embodiment, the second retaining structure can be positioned at various locations on the refill, such as the middle, near the second port, and so on, as needed. This allows for a wide variety of placement options and can be directly connected to the sidewall of the refill's bracket. This can be achieved by simply modifying the bracket's mold or manufacturing method, facilitating fabrication.

[0015] In some embodiments, the refill body has a first end and a second end disposed axially opposite each other, with the first end being provided with a pen tip and the second retaining structure being provided at the second end. Compared to providing the second retaining structure in the middle of the refill, this prevents the refill from being hard-collided with by the second retaining structure and the first retaining structure when the pen barrel contracts significantly due to temperature, further reducing the risk of cracking the pen barrel.

[0016] In some embodiments, the second limiting structure includes a limiting member, which is located on a side of the second end facing away from the first end and connected to the second end. Using the electronic pen provided in this embodiment, the structure of the existing pen refill can be maintained. By adding a limiting member to the rear end of the pen refill to form the second limiting structure, the range of movement of the pen refill within the pen barrel is limited. Compared to placing the second limiting structure in the middle of the pen refill, even when the pen barrel contracts significantly due to temperature changes, the presence of the second limiting structure and the first limiting structure will not cause a hard collision with the pen refill, further reducing the risk of cracking the pen barrel.

[0017] In some embodiments, the main body further includes a pen cap. A connecting structure is provided on a side of the limiting member facing away from the main body. The pen core body is connected to the pen cap through the connecting structure, and the pen cap is used for sealing connection with the pen barrel. The arrangement of the connecting structure enables the position of the pen core in the pen barrel to be fixed by the pen cap.

[0018] In some embodiments, the connecting structure includes a first glue-receiving groove for receiving an adhesive. The first glue-receiving groove is connected to the pen cap through the adhesive. In this way, the pen cap and the pen core can be connected by gluing, and the arrangement of the first glue-receiving groove can achieve the reception of the adhesive, reducing the risk of the adhesive entering the gap between the pen core and the pen barrel.

[0019] In some embodiments, a separating portion protrudes from the bottom of the first glue-receiving groove, and the separating portion divides the first glue-receiving groove into a plurality of groove bodies. The separating portion can adopt a plate body, a cylinder body or other structures as long as it can divide the first glue-receiving groove into a plurality of groove bodies. The arrangement of the separating portion divides the first glue-receiving groove into a plurality of groove bodies, enabling the assembler to place different amounts of adhesive in different groove bodies according to the assembly requirements, reducing the risk of adhesive waste.

[0020] In some embodiments, a second convex portion is provided on a surface of the pen cap facing the groove body, and at least a part of the second convex portion is inserted into one of the groove bodies. In this way, when there is adhesive in the groove body corresponding to the second convex portion, the adhesive can contact the outer surface of the second convex portion, increasing the bonding area between the pen cap and the connecting structure, thereby improving the connection stability between the pen core and the pen cap.

[0021] In some embodiments, a second glue-receiving groove is provided on a bottom surface of the second convex portion facing the groove body, and the second glue-receiving groove is used for allowing part of the adhesive to enter. The arrangement of the second glue-receiving groove enables the adhesive in the first groove body to enter it during the buckling process of the pen cap, without blocking the buckling of the pen cap, and at the same time can further increase the bonding area between the pen cap and the connecting structure, thereby improving the connection stability between the pen core and the pen cap.

[0022] In some embodiments, in the depth direction of the first glue-receiving groove, the depth of the first glue-receiving groove is less than the depth of the groove body corresponding to the second convex portion. In this way, more adhesive can be placed in the groove body corresponding to the second convex portion, so that the contact area between the outer wall of the second convex portion and the side wall of the second glue-receiving groove for bonding can be larger, contributing to improving the connection stability between the limiting member and the pen cap.

[0023] In some embodiments, a third glue receiving groove is provided on a surface of the pen cap facing the limiting member. The third glue receiving groove is disposed opposite to the first glue receiving groove and is used for allowing some adhesive to enter. The provision of the third glue receiving groove enables, when there is a relatively large amount of adhesive in the first glue receiving groove, the excess adhesive to enter the third glue receiving groove after the pen cap is fastened to the second port of the pen barrel, without causing an adverse effect on the fastening operation of the pen cap, and this can increase the contact area between the pen cap and the adhesive, enhancing the connection stability between the pen cap and the limiting member.

[0024] In some embodiments, the limiting member is welded to the pen core. This can make the connection between the bracket and the limiting member stable, and the mechanical strength of the combined component of the two is excellent.

[0025] In some embodiments, a positioning structure is provided between the limiting member and the pen core body. The positioning structure is used to define the relative positions of the limiting member and the pen core body. This can make the positions of the two stable and not prone to movement when the bracket and the limiting member are welded.

[0026] In some embodiments, the pen core body includes a bracket. One end of the bracket facing the limiting member is open. The positioning structure includes a third convex portion protruding from the limiting member facing the bracket, and the third convex portion is in plug-in fit with the bracket. The third convex portion can be inserted into the open port of the bracket and be in plug-in fit with it to achieve the positioning function, making the positions of the two stable and not prone to movement when the bracket and the limiting member are welded.

[0027] In some embodiments, the main body portion includes a pen core body and a pen cap. The pen cap is connected to the pen core body. The second limiting structure is located on the pen cap, and the pen cap is used for sealing connection with the pen barrel. By adopting the solution provided in this embodiment, compared with adopting the first and second embodiments, it is possible to fix the relative positions of the pen core and the pen barrel without additionally providing a second limiting structure on the pen core, making the structure of the electronic pen simple, highly feasible, without any additional cost or with a relatively low additional cost required, having a low manufacturing cost, and being easy to install, and it can be directly applied to existing electronic pens.

[0028] In some embodiments, a second guiding structure is provided on the outer wall of the pen core assembly. The second guiding structure is located between the second limiting structure and the tip of the pen core assembly, and the second guiding structure is used for sliding contact with at least a part of the inner wall of the pen barrel during the process of thermal expansion and contraction of the pen barrel. Such a provision of the second guiding structure enables, during the process of thermal expansion and contraction of the pen barrel, even if there is contact with the pen core, the two can perform sliding contact instead of hard collision, thereby reducing the acting force between the two and reducing the risk of cracking of the pen barrel.

[0029] In a third aspect, an electronic pen is provided. The electronic pen includes the pen barrel provided in each of the above embodiments and the refill assembly provided in each of the above embodiments. A part of the refill assembly is located in the accommodation cavity, and the movement range of the refill assembly in the pen barrel is defined by the second limiting structure and the first limiting structure. The part of the pen barrel between the first limiting structure and the first port is in clearance fit with the refill assembly. The effects of the third aspect are the same as those of the first aspect and will not be elaborated here.

[0030] In some embodiments, a first step structure is formed on the inner wall of the pen barrel. The first step structure is located between the first limiting structure and the first port. A second step structure is formed on the outer wall of the refill assembly. The second step structure is located between the first step structure and the first limiting structure, and the second step structure is disposed opposite to the first step structure. An activity space is formed therebetween. The activity space is used for the first step structure to move relative to the second step structure when the pen barrel undergoes thermal expansion and contraction. This can reduce the risk of hard collision or friction between the first step structure and the refill, and further reduce the risk of cracking of the pen barrel.

[0031] In some embodiments, in the axial direction of the pen barrel, the length of the activity space is greater than or equal to the maximum position movement amount of the first step structure relative to the second step structure within a preset temperature range. By adopting this solution, during the process of thermal expansion and contraction, the first step structure and the second step structure are not likely to come into contact, thereby reducing the risk of cracking of the pen barrel.

[0032] In some embodiments, a necking structure is provided at the end of the pen barrel corresponding to the first port. A first guiding structure is formed on the inner wall of the necking structure. A second guiding structure is formed on the outer wall of the refill assembly. The second guiding structure and the first guiding structure are disposed opposite to each other in the radial direction of the pen barrel. The second guiding structure is used for sliding contact with the first guiding structure during the process of thermal expansion and contraction of the pen barrel. The provision of the second guiding structure and the first guiding structure can enable the pen barrel and the refill to perform sliding contact rather than hard collision even when they come into contact during the process of thermal expansion and contraction of the pen barrel, thereby reducing the acting force between the two and reducing the risk of cracking of the pen barrel.

[0033] In a fourth aspect, an electronic device is provided, including a host and the electronic pen provided in each of the above embodiments. The electronic pen is communicatively connected to the host. The effects of the fourth aspect are the same as those of the third aspect and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the usage state of the electronic device provided by an embodiment of the present application;

[0035] Figure 2 is along Figure 1 the cross-sectional structure schematic diagram taken along the line A-A in

[0036] Figure 3 The structural schematic diagram of the electronic pen provided by the embodiment of the present application;

[0037] Figure 4 The exploded structural schematic diagram of the electronic pen provided by an embodiment of the present application;

[0038] Figure 5 The sectional structural schematic diagram of the electronic pen provided by an embodiment of the present application;

[0039] Figure 6 is Figure 5 The partial enlarged structural schematic diagram at position A in;

[0040] Figure 7 The cracking condition of the electronic pen provided by an embodiment of the present application;

[0041] Figure 8 The sectional structural schematic diagram of the electronic pen provided by another embodiment of the present application;

[0042] Figure 9 The sectional structural schematic diagram of the electronic pen provided by another embodiment of the present application;

[0043] Figure 10 is Figure 9 The partial enlarged structural schematic diagram at position C in;

[0044] Figure 11 is Figure 10 The partial sectional structural schematic diagram of the pen barrel in;

[0045] Figure 12 is Figure 10 The sectional structural schematic diagram of the limiting member in;

[0046] Figure 13 is Figure 10 The sectional structural schematic diagram of the pen cap in;

[0047] Figure 14 is Figure 10 The structural schematic diagram of the pen cap in;

[0048] Figure 15 The sectional structural schematic diagram of the electronic pen provided by another embodiment of the present application;

[0049] Figure 16 The sectional structural schematic diagram of the electronic pen provided by another embodiment of the present application;

[0050] Figure 17 is Figure 16 The partial enlarged structural schematic diagram at position E in;

[0051] Figure 18 is Figure 9Schematic diagram of the partial enlarged structure at D in

[0052] Figure 19 Schematic diagram of the partial sectional structure of the electronic pen provided by another embodiment of the present application.

[0053] Description of the reference numerals:

[0054] 10. Host; 11. Support device; 12. Touch screen; 13. Circuit board assembly; 14. Protective layer; 20. Electronic pen; 21. Pen barrel; 21a. Accommodating cavity; 21b. First port; 21c. Second port; 21d. Necking structure; 21e. First guiding structure; 22. Refill; 22a. Second guiding structure; 23. Pen cap; 24. First step structure; 25. Second step structure; 26. Refill assembly; 27. First limiting structure; 28. Connecting member;

[0055] 111. Frame; 112. Housing; 113. Accommodating space; 121. Touch sensor; 122. Touch control module; 123. Display screen; 124. Bonding layer; 131. Circuit board; 132. Control chip; 133. Camera module; 221. Nib; 222. Bracket; 223. Battery; 224. Control module; 225. Pressure sensing module; 231. Second convex part; 232. Second glue-containing groove; 233. Third glue-containing groove; 234. Fourth convex part; 271. First limiting surface; 261. Main body part; 261a. Refill body; 262. Second limiting structure; 262a. First convex part; 262b. Third convex part;

[0056] 2221. First frame; 2222. Second frame; 26221. First glue-containing groove; 26222. Isolation part; 26223. First groove; 2621. Limiting member; 2622. Connection structure;

[0057] k. Activity space. Detailed implementation manners

[0058] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0059] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0060] In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. For example, the first limiting portion and the second limiting portion are only used to distinguish different limiting portions, and do not limit their sequence. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and the terms "first" and "second" do not necessarily mean different.

[0061] It should be noted that in the present application, words such as "in one of the embodiments" or "for example" are used to give examples, illustrations or explanations. Any embodiment or design solution described as "in one of the embodiments" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "in one of the embodiments" or "for example" is intended to present related concepts in a specific manner.

[0062] In the present application, unless otherwise clearly specified and limited, terms such as "connected" and "coupled" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0063] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments.

[0064] Touch screens (also known as touch panels) are widely used in various electronic devices such as smartphones, tablets, e-book readers, etc. Touch screens allow users to directly operate the content on the screen with their fingers or other touch tools (such as styluses, digital pens, etc.), improving the convenience and intuitiveness of operation. Among them, both styluses and digital pens are tools designed for writing, drawing, or interacting on electronic devices. Styluses can achieve various functions such as clicking, swiping, and long-pressing to simulate the operations of fingers on the touch screen. Digital pens focus more on the writing and drawing experience and are commonly found on digital drawing tablets, tablets, or some specific laptops. They can capture the details of the user's writing or drawing and convert them into digital signals for storage or transmission. It can be understood that the difference between styluses and digital pens is not significant, and with the development of technology, the functions of the two are gradually converging. Therefore, some electronic pens can achieve both the functions of styluses and digital pens and can be called either styluses or digital pens. However, both styluses and digital pens can be collectively referred to as electronic pens. For the convenience of description, hereinafter, the tools that can be used for writing, drawing, or interacting on electronic devices will be described as electronic pens.

[0065] Electronic pens can be classified into various types according to their working principles, including but not limited to the following: resistive electronic pens, electromagnetic electronic pens, and capacitive electronic pens. Among them, resistive electronic pens are based on resistive pressure plate technology. By pressing the electronic pen, the resistance value of the touch screen is changed, thereby positioning the touch position of the electronic pen and / or moving the handwriting. Electromagnetic electronic pens achieve interaction with electronic devices through electromagnetic induction technology. Capacitive electronic pens change the capacitance value of the capacitor formed by the electronic pen and the touch screen by applying pressure to the touch screen with the electronic pen, and then locate the touch position of the electronic pen and / or move the handwriting. They have high sensitivity and stability and are widely used in electronic devices such as smartphones and tablets. Capacitive electronic pens can be further divided into passive capacitive pens and active capacitive pens. Among them, passive capacitive pens do not require charging, also known as passive capacitive pens, and are suitable for most tablets and mobile phones, but they do not have pen pressure sensing and anti-mis-touch functions. Active capacitive pens generally require charging or use batteries, also known as active capacitive pens. Some support pen pressure sensing and anti-mis-touch functions, but they need to match the corresponding device models.

[0066] An embodiment of the present application provides an electronic device, which has an electronic pen. The electronic device may also be referred to as a user equipment (UE) or a terminal, etc., and may be a mobile phone, a computer, a personal digital assistant (PDA) device, a computing device, a vehicle-mounted device, a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an industrial control terminal device, a self-driving device, a remote medical device, an electronic education device (such as an electronic dictionary pen, a point reader, etc.), a learning machine (such as an intelligent translation pen, a scanning pen, etc.). The embodiment of the present application does not specifically limit the form of the electronic device.

[0067] For ease of understanding, the following takes the electronic device as a mobile phone and the electronic pen as an active capacitive pen as an example to illustrate the structure and function of the above electronic device.

[0068] Figure 1 It is a schematic diagram of the usage state of the electronic device provided by the embodiment of the present application. As Figure 1 shown, the mobile phone includes a main body 10 and an electronic pen 20. The above main body 10 is the body of the mobile phone, including a support device 11 and a touch screen 12 provided on the support device 11. The support device 11 includes at least one frame 111. When there are two or more frames 111, two adjacent frames 111 are rotatably connected through a rotating shaft structure. At this time, the ends of two adjacent frames 111 close to the rotating shaft structure can rotate around the rotating shaft structure located between the two frames 111, so that the ends of the two frames 111 away from the rotating shaft structure are relatively close or relatively far away from each other, and the mobile phone can accordingly present different states such as folding or unfolding. Figure 2 For the Figure 1 cross-sectional structure schematic diagram along the A-A line in Figure 2 shown, in addition to the frame and the rotating shaft structure, the support device 11 may further include a housing 112, etc. The housing 112 is installed on the frame 111 and encloses an accommodation space 113 with the frame 111.

[0069] The touch screen 12 has a display area for displaying image information. One or more touch screens 12 can be provided. Any touch screen 12 covers one of the large surfaces of the support device 11, and the display area of the touch screen 12 is exposed to present image information to the user. The support device 11 is generally a three-dimensional structure with a certain length, width, and height, and the dimensions in length and width are generally greater than or equal to the dimension in height. The support device 11 has two large surfaces. The above-mentioned large surfaces refer to the two largest and relatively arranged surfaces in the support device 11 when the housing 111 is one; when the housing 111 is multiple, the two largest and relatively arranged surfaces in the support device 11 in the unfolded state. When multiple touch screens 12 are provided, generally, two touch screens 12 are provided on the two large surfaces of the support device 11. The number of touch screens 12 on each large surface can be determined according to the usage needs. For example, one touch screen 12 is provided on one large surface, and the remaining touch screens 12 are provided on the other large surface, or the number of touch screens 12 on the two large surfaces is equal.

[0070] When the support device 11 includes one housing 111, the touch screen 12 can be a flexible screen or a rigid screen; when the support device 11 includes multiple housings 111 and the touch screen 12 covers multiple housings 111, the touch screen 12 is generally a flexible screen and can present states such as folding or unfolding accordingly with the change in the position between adjacent housings 111.

[0071] As Figure 2 shown, the touch screen 12 is composed of multiple components, including but not limited to: a touch sensor 121, a touch control module 122, and a display screen 123. Among them, the touch sensor 121 is the core component of the touch screen 12 and is used to detect the touch input of the user. It is usually a transparent layer with a touch-responsive surface, such as an indium tin oxide (ITO) coated glass plate. This transparent layer is placed above the display screen 123 so that the user can directly perform touch operations on the touch screen 12. The touch sensor 121 can sense information such as the touch position, pressure magnitude, and touch trajectory, and convert this information into electrical signals.

[0072] The touch control module 122 includes a touch controller and other hardware and software components related to touch control. The touch controller is a microcontroller chip that is located between the touch sensor 121 and the control chip 132 (such as a central processing unit, a system chip, etc.) of the electronic device, and is electrically connected to both respectively. The main function of the touch controller is to receive electrical signals from the touch sensor 121 and convert them into a data format that can be understood by the control chip 132 in the electronic device. At the same time, the touch controller is also responsible for processing touch events, such as clicks, swipes, long presses, etc., and sending the processing results to the control chip 132 for further processing. All components of the touch control module 122 work together to achieve the detection, processing, and response of touch input. In addition, the touch control module 122 may also involve interfaces for connecting to the display screen 123 and other electronic components in the electronic device.

[0073] The display screen 123 is the part of the touch screen 12 that is used to display information such as images, texts, and videos. It is usually closely attached to the touch sensor 121. There are various types of display screens 123, including liquid crystal displays (LCDs) and organic light emitting diode displays (OLEDs), etc. Among them, LCDs display images by controlling the light transmittance of liquid crystals; while OLEDs have the self-luminous characteristic and can directly emit light to display images.

[0074] In addition, in the touch screen 12, the touch sensor 121 and the display screen 123 usually need to be connected through one or more bonding layers 124. These bonding layers 124 can be optical adhesives, water adhesives, or other types of adhesives. Their main function is to closely attach the touch sensor 121 and the display screen 123 together, eliminate the air layer between the two, and improve the display effect and touch sensitivity. In order to protect the touch screen 12 from external damages such as scratches and impacts, a protective layer 14 is usually covered on the outermost layer of the touch screen 12. This protective layer 14 is generally glass, or can be resin, or other layer bodies with high strength and wear resistance and that do not affect the light emission. This protective layer 14 can prevent impurities such as dust and moisture from entering the interior of the touch screen 12.

[0075] Such as Figure 2As shown in the figure, in addition to the support device 11 and the touch screen 12, the host 10 generally further includes a circuit board assembly 13 disposed on the support device 11 and electrically connected to the touch screen 12. The circuit board assembly 13 includes a circuit board 131 and electronic components disposed on the circuit board 131. There is at least one circuit board 131, and electronic components are provided on each circuit board 131. The circuit board 131 is generally a printed circuit board 131 (Printed Circuit Board, PCB). The electronic components include, but are not limited to, a control chip 132 (such as a system on chip (System on Chip, SoC), a central processing unit (Central Processing Unit, CPU), etc.), a camera module 133, a UFS (abbreviation of UNIX file system), an intelligent algorithm chip, an antenna module, a Bluetooth module, a wireless fidelity (WiFi) module, a global positioning system (Global Positioning System, GPS) module, a power supply and a charging module, and a screen display and operation module. One or more of the above electronic components may be provided on each circuit board 131, or other electronic components not listed above may be provided according to the usage requirements, and the specific setting method may be determined according to the usage requirements. Among them, the screen display and operation module includes, but is not limited to, multiple sub-modules such as a display driving circuit, a processor, a memory, an input / output interface, firmware, and software. The touch screen 12 is generally electrically connected to the above screen display and operation module so that the touch screen 12 can implement functions such as touch input, information processing, and display output.

[0076] The host 10 and the electronic pen 20 can be electrically connected through a wire, or wireless signal interaction can be achieved through a wireless connection method such as a Bluetooth network or a near field communication (NFC) network. When the host 10 is connected to the electronic pen 20 through a wireless connection method, it is convenient for the electronic pen 20 to move freely without being restricted by a wire. The electronic pen 20 can perform related operations on the touch screen 12 of the host 10, such as character input, clicking, or drawing. The electronic pen 20 can also operate the host 10 at a distance, such as unlocking or locking the host 10, answering or hanging up an incoming call, etc.

[0077] The electronic pen 20 is an active capacitive pen. Inside the electronic pen 20, there is one or more capacitor structures. When the nib 221 (usually made of a conductive material) of the electronic pen 20 slides on the conductive layer of the touch screen 12, a changing capacitor is formed between the nib 221 and the touch screen 12. The two plates of this capacitor are the nib 221 and the touch screen 12 respectively. As the nib 221 moves on the touch screen 12, the distance and relative area between the two plates of the capacitor change, resulting in a change in the capacitance value of the capacitor. The corresponding chips in the electronic device (such as the control chip 132, algorithm chip, etc.) can identify the position of the electronic pen 20 on the touch screen 12 and the inclination angle of the electronic pen 20 based on the above changes in capacitance value.

[0078] Figure 3 This is a schematic structural diagram of the electronic pen provided by an embodiment of the present application. As Figure 3 shown, the electronic pen 20 includes a pen barrel 21, a refill 22, and a pen cap 23. Among them, the pen barrel 21 is generally a tubular structure with a predetermined length, open at both ends. One end has a smaller opening for the nib 221 in the refill 22 to pass through, and this port is hereinafter referred to as the first port; the other end has a larger opening for covering the pen cap 23, and this port is hereinafter referred to as the second port.

[0079] Figure 4 This is an exploded structural diagram of the electronic pen provided by an embodiment of the present application. As Figure 4 shown, the refill 22 includes a nib 221, a bracket 222, a battery 223, a control module 224, and a pressure sensing module 225. Among them, the nib 221 includes a capacitance sensor and an insulating layer coated outside the capacitance sensor. The capacitance sensor is the core component of the nib 221 and is used to detect the capacitance change between the nib 221 and the touch screen 12. When the nib 221 approaches or touches the touch screen 12, due to the principle of capacitance induction, an electric field is formed between the nib 221 and the touch screen 12, and the change of this electric field will be captured by the capacitance sensor. The capacitance sensor can accurately sense the position, movement, and possible pressure change of the nib 221, convert these changes into electrical signals, and then transmit these electrical signals to the host 10 through the control module 224 for further processing and interpretation. The capacitance sensor usually includes a metal electrode. The capacitance change between the metal electrode and the touch screen 12 is the basis for detecting the position and pressure of the nib 221. The electric field formed between the metal electrode and the touch screen 12 changes as the nib 221 approaches or touches, and this change is captured by the capacitance sensor and converted into an electrical signal. The insulating layer is used to prevent current from directly flowing through the nib 221 to the touch screen 12, thereby protecting the touch screen 12 and the electronic pen from damage. The insulating layer ensures the normal operation of the capacitance sensor and protects the safety of the touch screen 12 and the electronic pen.

[0080] The nib 221 is connected to the pressure sensing module 225 and can conduct the force applied to itself to the pressure sensing module 225. The pressure sensing module 225 is a key component for identifying the writing force of the electronic pen and is electrically connected and / or communicatively connected to the control module 224. According to the usage requirements, one or more pressure sensors can be provided in the pressure sensing module 225. For example, one pressure sensor can be provided to sense the force applied to the nib 221 in the axial direction of the pen barrel 21. Two pressure sensors can also be provided, one of which is used to sense the force applied to the nib 221 in the axial direction of the pen barrel 21, and the other is used to sense the force applied to the nib 221 in the radial direction of the pen barrel 21. The pressure sensing module 225 is used to receive the pressure conducted by the nib 221, convert it into an electrical signal, and transmit the electrical signal to the control module 224.

[0081] The control module 224 is one of the core components inside the electronic pen 20, responsible for processing signals from components such as the pressure sensing module 225 and the host 10, and controlling the communication between the electronic pen 20 and the host 10. The control module 224 generally includes a circuit board and several electronic components. The electronic components can include, but are not limited to, a control module, a communication module, a power management chip, etc. Among them, the control module can be a microcontroller unit (MCU), a digital signal processor (DSP), or other control modules. The control module is the core of the control module 224, responsible for receiving signals from the pressure sensing module 225, the host, etc., and processing them. The microcontroller or DSP can execute complex algorithms to achieve precise parsing and processing of signals. The communication module includes modules for wired or wireless communication with the host, such as a Bluetooth module, a WiFi module, etc. These modules allow the electronic pen 20 to wirelessly transmit the processed signals (such as pressure signals, touch signals, etc.) to the host and receive instructions or data from the host 10. The power management chip is responsible for managing the power supply of the electronic pen 20, including charging, discharging, and regulating the voltage and current of the battery 223. The power management chip can enable the electronic pen 20 to maintain a stable power supply during long-term use and extend the service life of the battery 223.

[0082] In addition, the control module 224 may further include a storage chip, passive components, an interface circuit, an indicator light, etc. Among them, the storage chip is used to store the configuration information of the electronic pen 20, firmware updates, etc. Although the storage chip may not be an essential part of the control module 224 in all electronic pens 20, it can help the electronic pen 20 achieve more functions and more flexible configurations. The passive components can be resistors, capacitors, inductors, etc., which play roles such as filtering, voltage regulation, and current limiting in the circuit, helping the control module 224 achieve more accurate signal processing and more stable power supply. The interface circuit includes interface circuits for connecting components such as the pressure sensing module 225 and the host. These interface circuits allow the control module 224 to perform data transmission and signal exchange with these components. The indicator light is used to display the working state of the electronic pen 20 (such as charging state, connection state, etc.).

[0083] It should be noted that the above-listed electronic components are only a part that may appear on the control module 224 of the electronic pen 20, and the specific composition of electronic components may vary depending on different designs of the electronic pen 20.

[0084] The above battery 223 can be a disposable battery (such as non-rechargeable batteries like alkaline batteries and acidic zinc-manganese batteries), or a rechargeable battery (such as lead-acid batteries, nickel-cadmium batteries, lithium-ion batteries, etc.), which is used to supply power to the electronic components in the pen tip 22. Specifically, the battery 223 can be electrically connected to the control module 224, the pen tip 221, etc. through electrical connectors such as wires and circuit boards, and is electrically connected to the pressure sensing module 225 through the control module 224, or can also be electrically connected to the control module 224, the pen tip 221, and the pressure sensing module 225 respectively through the above electrical connectors, which can be determined according to actual usage needs.

[0085] When the user writes or draws on the touch screen 12 with the electronic pen 20, the pen tip 221 will exert a certain pressure on the touch screen 12. The pressure sensing module 225 can sense this change in pressure and convert it into an electrical signal. This electrical signal is usually an analog signal representing the magnitude of the pressure. This analog signal will be sent to the control module 224 inside the electronic pen 20 for processing. The control module 224 will perform digital processing on the analog signal, convert it into a digital signal, and perform necessary signal processing such as amplification and filtering to ensure the accuracy and stability of the signal. The processed digital signal will be sent by the control module 224 to the connected host (such as a tablet computer, a smart phone, etc.) through the communication module.

[0086] After that, the host processes and analyzes the above digital signal to determine the magnitude of the writing force of the user, and adjusts the thickness of the line displayed on the touch screen 12 according to the above analysis result. For example, in a painting software, a greater writing force may produce a thicker line, while a smaller writing force will produce a thinner line.

[0087] The above-mentioned bracket 222 can be an integral structure or a combined structure of multiple components. When the bracket 222 is an integral structure, it can be a tubular structure, a plate-shaped structure, or other structures, as long as it can achieve the installation of the battery 223, the control module 224, and the pressure sensing module 225. When the bracket 222 is a combined structure of multiple components, the bracket 222 can include at least two sets of split parts, and a single set of split parts can be used for the installation of at least one of the battery 223, the control module 224, and the pressure sensing module 225. Adjacent two split parts can be connected by welding, plugging, etc.

[0088] For example, in some embodiments, the bracket 222 includes two sets of split parts, which are respectively named the first frame body 2221 and the second frame body 2222. The first frame body 2221 is a battery bracket for supporting and defining the position of the battery 223. The second frame body 2222 is connected to the first frame body 2221 and is used to carry the control module 224. An outer shell can be provided outside the pressure sensing module 225. At this time, the second frame body 2222 is also connected to the outer shell of the pressure sensing module 225. If no outer shell is provided outside the pressure sensing module 225, the bracket 222 can further include a third frame body, and the third frame body is used to carry the pressure sensing module 225 and is connected to the second frame body 2222.

[0089] In addition, a charging interface, buttons, etc. may also be provided on the electronic pen 20. Among them, the charging interface (such as a Type-C interface, etc.) is electrically connected to the battery 223 and is used to charge the battery 223. Buttons can be set with various functions according to usage needs (such as a button for controlling the switch of the electronic pen 20, a button for switching functions, etc.), and are generally electrically connected to the control module 224.

[0090] Figure 5 It is a schematic cross-sectional structure diagram of the electronic pen provided by an embodiment of the present application. Figure 6 is Figure 5 a partial enlarged structure diagram of part A in Figure 5 and Figure 6As shown in the figure, a receiving cavity 21a is provided inside the pen barrel 21. Both ends of the receiving cavity 21a are open. The receiving cavity 21a has a first port 21b and a second port. The opening area of the first port 21b is smaller than that of the second port. The refill 22 is inserted into the pen barrel 21, and at least part of the nib 221 passes through the first port 21b of the pen barrel 21. In order to relatively fix the position of the nib 221 and the pen barrel 21, a limiting structure is generally provided. The limiting structure includes a first step structure 24 provided on the inner wall of the pen barrel 21 and a second step structure 25 provided on the outer wall of the refill 22. When the refill 22 is inserted into the receiving cavity 21a of the pen barrel 21 from the second port and the step surface of the second step structure 25 abuts against the step surface of the first step structure 24, the refill 22 can no longer move in the direction of the nib 221. At this time, at least part of the nib 221 passes through the first port 21b of the pen barrel 21 and is exposed outside, and the exposed length is a preset length.

[0091] The above-mentioned first step structure 24 is arranged close to the first port 21b, and most of the components in the refill 22 are metal parts. The pen barrel 21 is generally made of plastic materials such as polycarbonate (PC). The thermal expansion and contraction coefficient of the PC material is about (5-7)×10^-5 / ℃. The thermal expansion and contraction coefficient refers to the amount of length change of a one-meter-long solid substance when the temperature rises by one degree Celsius. According to the formula △L = α×△T×L, where L is the length of the object at the initial temperature, △T is the temperature change, α is the thermal expansion and contraction coefficient of the object, and △L is the length change of the object. The above △T is the difference between the temperature reached after cooling or heating and the initial temperature. When the length of the pen barrel at the initial temperature (25℃) is 153mm, in the case of -10℃, the contraction length of the pen barrel is within (0.26mm, 0.38mm), about 0.3mm.

[0092] The thermal expansion and contraction coefficient of metal materials is generally smaller than that of plastic materials. In winter or in a low-temperature environment, the volume of the pen barrel 21 shrinks significantly under the influence of temperature (especially in the axial direction X of the pen barrel 21), and continuous internal stress will be received in a low-temperature environment. The volume of the refill 22 shrinks insignificantly under the influence of temperature. Also, since the distance between the above-mentioned second step structure 25 and the nib 221 is relatively small (generally less than or equal to 1 / 10 of the length of the pen barrel), when the pen barrel 21 shrinks, it will collide hard with the refill 22 axially, resulting in the pen barrel 21 being prone to cracking at the first step structure 24. Figure 7 It is a schematic diagram of the cracking situation of the electronic pen provided by an embodiment of the present application. As Figure 7 shown, the electronic pen may crack in a circular crack at the first step structure, and the cracking position is as Figure 7The area is circled by the dotted line frame B. In addition, in other embodiments, the electronic pen may also crack along the axial direction of the pen barrel.

[0093] To improve, or at least partially alleviate, the aforementioned problem, another embodiment of the present application provides an electronic pen. This electronic pen modifies the position of a retaining structure between the refill and the pen barrel, increases the distance between the retaining structure and the first port of the pen barrel, and provides a clearance fit between the pen barrel and the refill. This prevents the pen barrel from contacting or rubbing against the refill when it contracts due to temperature, or reduces the force between the pen barrel and the refill during this process, thereby reducing the risk of cracking the pen barrel.

[0094] Figure 8 This is a cross-sectional structural diagram of an electronic pen provided in another embodiment of the present application. Figure 8 As shown, in this embodiment, the electronic pen 20 includes a pen barrel 21 and a pen core assembly 26. The pen barrel 21 has a receiving chamber 21a, which is open at both ends. The receiving chamber 21a has a first port 21b and a second port 21c. The opening area of the first port 21b is smaller than the opening area of the second port 21c. It is understood that Figure 8 The second port 21c is partially enclosed by the cap 23, and the outer edge of the second port 21c is flush with the end surface of the pen barrel 21 facing away from the refill 221. The refill assembly 26 is partially located within the accommodating cavity 21a. The refill assembly 26 may include only the refill 22 or both the refill 22 and the cap 23, depending on the intended use.

[0095] The inner wall of the pen barrel 21 is provided with a first limiting structure 27. The refill assembly 26 includes a main body portion 261 and a second limiting structure 262. The main body portion 261 may only include the above-mentioned refill 22, or may include both the above-mentioned refill 22 and the pen cap 23, which can be specifically determined according to the usage requirements. The second limiting structure 262 is connected to the main body portion 261. At least part of the second limiting structure 262 protrudes from the outer wall of the main body portion 261 to form a first convex portion 262a. The first convex portion 262a is used to cooperate with the first limiting structure 27 to limit the moving range of the refill assembly 26 relative to the pen barrel 21. The cooperation mode between the first convex portion 262a and the first limiting structure 27 can be lapping, clamping, plugging, gluing, etc., which can be specifically determined according to the installation positions, structures, usage principles, etc. of the first convex portion 262a and the first limiting structure 27. Limiting the moving range of the refill assembly 26 relative to the pen barrel 21 means that when the refill assembly 26 is inserted into the accommodation cavity 21a of the pen barrel 21 from the second port, and after the first convex portion 262a contacts or cooperates with the first limiting structure 27 in place, the refill assembly 26 cannot continue to be inserted forward in the insertion direction (i.e., the direction from the second port to the first port). At this time, at least part of the nib on the refill assembly 26 protrudes from the pen barrel 21, and the protruding length is a preset length. The preset length is the length expected to protrude, and it is also the length that can enable the electronic pen to meet the usage requirements.

[0096] Wherein, in the axial direction X of the pen barrel 21, the distance a1 between the first limiting structure 27 and the first port 21b is greater than or equal to 1 / 2 of the length a2 of the pen barrel 21. The portion of the pen barrel 21 between the first limiting structure 27 and the first port 21b is in clearance fit with the refill assembly 26. Clearance fit means that there is a clearance between the inner wall portion of the pen barrel 21 between the first limiting structure 27 and the first port 21b and the refill assembly 26, and the minimum value of the clearance is greater than or equal to 0. It can be understood that the above-mentioned clearance can enable the pen barrel and the refill to expand or contract by different lengths due to different coefficients of thermal expansion and contraction, and the pen barrel can elongate or contract relative to the refill. The size of this clearance can be determined according to the shapes, structures, etc. of the pen barrel 21 and the refill assembly 26, as long as the pen barrel 21 does not collide rigidly with the refill assembly 26 during the process of thermal expansion and contraction, or the rigid collision that occurs is not sufficient to cause the pen barrel 21 to crack.

[0097] In the electronic pen 20 provided in the previous embodiment, the movement range of the pen core 22 in the pen barrel 21 is restricted by the above-mentioned first step structure 24 and second step structure 25. The first step structure 24 is disposed close to the first port 21b, that is, the distance between the first step structure 24 (equivalent to the first limiting structure 27 in this embodiment) and the first port 21b is very small, accounting for less than 1 / 10 of the total length of the pen barrel 21. Generally, the shrinkage conditions of each region are the same during the shrinkage process of the pen barrel 21. Since the length of the part of the pen barrel 21 between the first step structure 24 and the second port 21c is much greater than the length of the part between the first step structure 24 and the first port 21b, the axial shrinkage length and shrinkage force of the part of the pen barrel 21 between the first step structure 24 and the second port 21c are much greater than those of the part between the first step structure 24 and the first port 21b. The axial shrinkage force of the part of the pen barrel 21 between the first step structure 24 and the second port 21c is all converted into the pushing force of the first step structure 24 on the second step structure 25, resulting in a large pushing force, which causes the pen barrel 21 to crack. In this embodiment, the limiting structure on the current electronic pen is replaced by the first limiting structure and the second limiting structure. On the axial direction X of the pen barrel 21, the distance between the first limiting structure 27 and the first port 21b is greater than or equal to 1 / 2 of the length of the pen barrel 21. At this time, if the shrinkage conditions of each region of the pen barrel 21 are the same, only the shrinkage force of half or less than half of the region of the pen barrel 21 close to the second port 21c in the axial direction will be converted into the pushing force of the first step structure 24 on the second step structure 25, reducing the above-mentioned pushing force by more than half, thereby reducing the risk of cracking of the pen barrel 21. In addition, when designing the pen barrel 21, it can also be designed as a structure that shrinks from both ends to the middle by adjusting materials, structures, etc., that is, the middle region of the pen barrel 21 is set as its thermal expansion center region. In this way, the distance between the first limiting structure 27 and the first port 21b is greater than or equal to 1 / 2 of the length of the pen barrel 21, which can cause both ends of the pen barrel 21 to shrink towards the middle of the pen barrel 21, separating the first limiting structure from the second limiting structure, or driving the second limiting structure to move towards the middle region of the pen barrel by the first limiting structure, without causing the first limiting structure 27 to exert a pushing force on the second limiting structure 262, further reducing the risk of cracking of the pen barrel 21.

[0098] It can be seen that by using this electronic pen 20, compared with using the electronic pen 20 provided in the previous embodiment, by increasing the distance between the first limiting structure 27 and the first port 21b, and at the same time, the part of the pen barrel 21 located between the first limiting structure 27 and the first port 21b is in clearance fit with the refill assembly 26, when the pen barrel 21 expands and contracts due to heat, it is not easy to collide with the refill assembly 26, or when the two have a hard collision, the force between them is small, so that the risk of cracking of the pen barrel 21 can be reduced.

[0099] In some other embodiments, in the axial direction X of the pen barrel 21, the distance a1 between the first limiting structure 27 and the first port 21b is greater than or equal to 3 / 4 of the length a2 of the pen barrel. In this way, compared with the distance a1 between the first limiting structure 27 and the first port 21b being between 1 / 2 of the length a2 of the pen barrel 21 and 3 / 4 of the length a2 of the pen barrel, the distance between the first limiting structure 27 and the first port 21b can be further increased, reducing the risk of cracking of the pen barrel 21. In addition, the electronic pen provided in this embodiment has a simple solution, high feasibility, low cost, and has no impact on the writing function and use experience of the electronic pen.

[0100] Since there are various setting methods for the refill assembly 26, there are also various setting methods for the second limiting structure 262 and the first limiting structure 27. For the convenience of description and understanding, examples are given below.

[0101] Embodiment 1

[0102] As Figure 8 shown, in this embodiment, in the axial direction X of the pen barrel 21, the distance a1 between the first limiting structure 27 and the first port 21b is greater than or equal to 1 / 2 of the length a2 of the pen barrel 21.

[0103] As Figure 8 shown, the above-mentioned main body part 261 includes a refill body 261a, and the structure of the refill body 261a is the same as that of the refill in the above embodiment. The second limiting structure 262 is provided on the side wall of the refill body 261a. And the position of the second limiting structure 262 corresponds to the position of the first limiting structure 27. The second limiting structure 262 can be an annular structure or a plurality of split structures arranged around the refill body 261a, and can be specifically determined according to the use needs. It can be understood that whether the second limiting structure is an annular structure or a split structure, the first limiting structure 17 can also be an annular structure or a plurality of split structures arranged around the refill body 261a.

[0104] In this embodiment, the second limiting structure 262 can be integrally formed with the bracket in the refill body 261a, or can be one or more separately provided components, and are connected to the bracket by plugging, welding or other means. It can be understood that when the second limiting structure 262 is integrally formed with or welded to the above-mentioned bracket, the whole of the second limiting structure 262 protrudes from the bracket. At this time, the whole of the second limiting structure 262 forms the above-mentioned first convex portion 262a; when the second limiting structure 262 is plugged or snapped with the above-mentioned bracket, at least part of the second limiting structure 262 is located inside the bracket. At this time, the part of the second limiting structure 262 protruding from the bracket forms the above-mentioned first convex portion 262a.

[0105] In this embodiment, the first convex portion 262a can only overlap with the first limiting structure 27, or can be plugged or snapped with the first limiting structure 27, etc., which can be determined according to actual use needs. When the first convex portion 262a overlaps with the first limiting structure 27, after the refill body 261a is plugged in place, the tail end of the refill body 261a and the pen barrel 21 can be fixed by gluing or fixing with a fixing member, etc., to realize the fixation of the positions of the refill body 261a and the pen barrel 21. The above-mentioned fixing member can be the above-mentioned pen cap 23, or other fixing members, such as a rubber cap hermetically connected to the pen barrel 21, a snap member snapped with the pen barrel 21, etc., which can be determined according to actual use needs.

[0106] Using the electronic pen 20 provided in this embodiment, the second limiting structure 262 can be arranged at different positions of the refill body 261a according to needs, such as in the middle, near the second port, etc. There are many setting positions, and it can be directly connected to the side wall of the bracket of the refill body 261a, and can be realized by simply modifying the production mold or production method of the bracket, which is convenient for preparation.

[0107] In some embodiments, the second limiting structure 262 is arranged at the tail of the refill body 261a, that is, the refill body 261a has a first end and a second end arranged axially away from each other. The first end is provided with a nib 221, and the second limiting structure 262 is arranged at the second end. At this time, compared with the second limiting structure 262 being arranged in the middle of the refill body 261a, when the pen barrel 21 is significantly shrunk due to temperature influence, it will not collide rigidly with the refill body 261a due to the existence of the second limiting structure 262 and the first limiting structure 27, and the risk of cracking of the pen barrel 21 can be further reduced.

[0108] Embodiment Two

[0109] Figure 9 It is a schematic cross-sectional structure diagram of an electronic pen provided in another embodiment of the present application. As Figure 9As shown, in this embodiment, the second limiting structure 262 is provided at the tail of the refill body 261a and is connected to the refill body 261a. The tail of the above-mentioned refill body 261a refers to the end of the refill body 261a that is arranged opposite to the nib 221. In other words, the refill body 261a has a first end and a second end that are arranged opposite to each other in the axial direction. The first end is provided with the nib 221, and the second limiting structure 262 is provided at the second end.

[0110] Figure 10 It is Figure 9 a schematic diagram of a partially enlarged structure at position C in Figure 10 As shown, in this embodiment, the second limiting structure 262 is located on the side of the second end of the refill body 261a that faces away from the first end. The second limiting structure 262 includes a limiting member 2621, and the limiting member 2621 is connected to the bracket 222 in the refill body 261a. Specifically, the limiting member 2621 can be welded, inserted or connected in other ways to the bracket 222, which can be determined according to the structures of the bracket 222 and the limiting member 2621 and the design requirements.

[0111] Figure 11 It is Figure 10 a schematic diagram of a partial cross-sectional structure of the pen barrel in Figure 10 and Figure 11 As shown, in this embodiment, the first limiting structure 27 is provided at the tail of the pen barrel 21, and its position corresponds to that of the second limiting structure. The first limiting structure 27 can be integrally formed on the inner wall of the pen barrel 21 by changing the mold for manufacturing the pen barrel 21 while manufacturing the pen barrel 21, or can be formed by removing a part of the inner wall of the pen barrel 21 after the pen barrel 21 is manufactured. At least a part of the outer edge of the limiting member 2621 protrudes from the side wall of the bracket 222 to form the above-mentioned first convex portion 262a. The first convex portion 262a limits the moving range of the refill body 261a in the pen barrel 21 by overlapping with the first limiting structure 27.

[0112] By using the electronic pen 20 provided in this embodiment, without changing the structure of the existing refill body 261a, a limiting member 2621 is added to the tail of the refill body 261a to form the second limiting structure 262, so as to limit the moving range of the refill body 261a in the pen barrel 21. Moreover, compared with setting the second limiting structure 262 in the middle of the refill body 261a, when the pen barrel 21 is significantly contracted due to temperature influence, there will be no hard collision with the refill body 261a in the axial direction due to the existence of the second limiting structure 262 and the first limiting structure 27, which can further reduce the risk of cracking of the pen barrel 21.

[0113] In some embodiments, the bracket 222 and the limiter 2621 are welded. Specifically, the limiter 2621 and the bracket 222 can both be made of metal materials, or can both be made of other materials (such as composite materials with good mechanical properties), which can be determined according to the needs of use. The bracket 222 can be cylindrical, or can be the remaining part after the cylindrical shape is cut in half along the axial direction, or can be other shapes, which can be determined according to the needs of use. In this way, the connection between the bracket 222 and the limiter 2621 can be stable, and the mechanical strength of the assembly of the two is excellent. In order to ensure that the positions of the bracket 222 and the limiter 2621 are stable and not easy to move when they are welded, the end of the limiter 2621 facing the bracket 222 can be provided with a positioning structure for plugging, snapping, etc. of the bracket 222. For example, a protrusion facing the limiter 2621 can be provided on the bracket 222, and a groove, blind hole, etc. for accommodating the protrusion can be provided on the limiter 2621; or, as Figure 10 and Figure 12 As shown, the side of the bracket 222 facing away from the pen tip 221 is open, and the side of the stopper 2621 facing the bracket 222 is provided with a third protrusion 262b. The third protrusion 262b can be inserted into the open end of the bracket 222 and engage therewith to achieve a positioning function. In addition, other positioning structures can also be provided on the bracket 222 and the stopper 2621.

[0114] It is understandable that in the above-mentioned second embodiment, the electronic pen 20 may or may not include the pen cap 23. When the electronic pen 20 does not include the pen cap 23, after the pen core body 261a is inserted into place, it can be fixed in place with the pen barrel 21 by means of gluing or other methods. When the electronic pen 20 includes the pen cap 23, after the pen core body 261a is inserted into place, it can be fixed in place with the pen barrel 21 with the help of the pen cap 23. For example, the pen cap 23 is connected to the pen barrel 21 and abuts against the pen core body 261a. In addition, the pen core body 261a and the pen cap 23 may not be connected, and both may be connected to the pen barrel 21 separately by adhesives. The specific method can be determined according to usage needs.

[0115] In some embodiments, a connection structure 2622 is provided on the side of the stopper 2621 facing away from the cartridge body 261a. The stopper 2621 is connected to the pen cap 23 via the connection structure 2622. The pen cap 23 is connected to the pen barrel 21. Specifically, the pen cap 23 can be connected to the pen barrel 21 by plugging, threading, or other means.

[0116] It can be understood that the limiting member 2621 can be directly connected to the pen cap 23 through the connecting structure 2622, or indirectly connected to the pen cap 23 with the help of the above-mentioned connecting structure 2622. For example, when the connecting structure is a plugging or clamping structure, etc., the limiting member 2621 can be directly connected to the pen cap 23 through the connecting structure 2622. When the connecting structure includes a glue receiving groove, the limiting member 2621 can be connected to the pen cap 23 through an adhesive, and in this case, the limiting member 2621 is indirectly connected to the pen cap 23 with the help of the above-mentioned connecting structure 2622. In addition, the connecting structure can also include both the above-mentioned glue receiving groove and other structures, such as a plugging structure for plugging with the pen cap 23, a clamping structure for clamping with the pen cap 23, etc. In this case, a part of the limiting member 2621 is directly connected to the pen cap 23 through the connecting structure 2622, and the other part is indirectly connected to the pen cap 23 with the help of the above-mentioned connecting structure 2622.

[0117] In any of the above cases, the setting of the connecting structure 2622 can make the position of the pen core body 261a in the pen barrel 21 fixed through the pen cap 23.

[0118] Figure 12 For Figure 10 the cross-sectional structure schematic diagram of the limiting member in Figure 12 As shown, in some embodiments, the above-mentioned connecting structure 2622 includes a first glue receiving groove 26221, and the first glue receiving groove 26221 is used to hold the adhesive. The first glue receiving groove 26221 is connected to the pen cap through an adhesive. In this way, the pen cap and the pen core body can be connected by gluing, and the setting of the first glue receiving groove 26221 can achieve the holding of the adhesive and reduce the risk of the adhesive entering the gap between the pen core body and the pen barrel.

[0119] In some embodiments, a separating portion 26222 protrudes from the bottom of the first glue receiving groove 26221, and the separating portion 26222 divides the first glue receiving groove 26221 into multiple grooves. The separating portion 26222 can adopt a plate body, a cylinder body or other structures, as long as it can divide the first glue receiving groove 26221 into multiple grooves. The setting of the separating portion 26222 divides the first glue receiving groove 26221 into multiple grooves, so that the assembler can place different amounts of adhesive in different grooves according to the assembly needs, reducing the risk of adhesive waste.

[0120] In some embodiments, a second convex portion 231 is provided on the surface of the pen cap 23 facing the first glue receiving groove 26221, and at least a part of the second convex portion 231 is inserted into one of the above-mentioned grooves. In this way, when there is adhesive in the groove corresponding to the second convex portion 231, the adhesive can contact the outer surface of the second convex portion 231, increasing the bonding area between the pen cap 23 and the connecting structure 2622, thereby improving the connection stability between the pen core body 261a and the pen cap 23.

[0121] Figure 13 The Figure 10 schematic cross-sectional structure diagram of the pen cap in Figure 10 and Figure 13 shown. In some embodiments, a second glue receiving groove 232 is provided on one side of the second convex portion 231 facing the bottom surface of the corresponding groove body. The second glue receiving groove 232 is used for allowing part of the adhesive to enter. The provision of the second glue receiving groove 232 enables the adhesive in the first groove body 26223 to enter it during the buckling process of the pen cap 23, without blocking the buckling of the pen cap 23. At the same time, it can further increase the bonding area between the pen cap 23 and the connection structure 2622, thereby improving the connection stability between the pen core body 261a and the pen cap 23.

[0122] In some embodiments, in the depth direction of the first glue receiving groove 26221, the depth of the first glue receiving groove 26221 is less than the depth of the groove body corresponding to the second convex portion. Generally, the depth direction of the first glue receiving groove 26221 is the axial direction of the pen barrel, or it can be set at an angle (such as 5°, 10°, etc.) with the axial direction of the pen barrel, which can be determined according to actual use needs. By adopting the solution provided in this embodiment, more adhesive can be contained in the groove body corresponding to the second convex portion, so that the contact area between the outer wall of the second convex portion 231 and the side wall of the second glue receiving groove 232 can be larger, which helps to improve the connection stability between the limiting member 2621 and the pen cap 23.

[0123] In some embodiments, the isolation portion 26222 is connected end to end to enclose one of the groove bodies. This groove body is denoted as the first groove body 26223. At least part of the second convex portion 231 is inserted into the first groove body 26223. In this embodiment, the cross-sectional shape of the isolation portion 26222 can be annular, rectangular, square or irregular, which can be determined according to actual use needs. The pen cap 23 is provided with a second convex portion 231, and at least part of the second convex portion 231 is inserted into the first groove body 26223. When there is adhesive in the first groove body 26223, the bonding area between the pen cap 23 and the connection structure 2622 can be increased, thereby improving the connection stability between the pen core body 261a and the pen cap 23.

[0124] Figure 13 The Figure 10 schematic cross-sectional structure diagram of the pen cap in Figure 10 and Figure 13As shown, in some embodiments, a third glue receiving groove 233 is provided on a surface of the pen cap 23 facing the limiting member 2621. The third glue receiving groove 233 is disposed opposite to the first glue receiving groove 26221. The third glue receiving groove 233 is used for allowing part of the adhesive to enter. The provision of the third glue receiving groove 233 enables, when there is a relatively large amount of adhesive in the first glue receiving groove 26221, after the pen cap 23 is buckled to the second port of the pen barrel 21, the excess adhesive to enter the third glue receiving groove 233, without causing an adverse effect on the buckling operation of the pen cap 23, and this can increase the contact area between the pen cap 23 and the adhesive, enhancing the connection stability between the pen cap 23 and the limiting member 2621.

[0125] It can be understood that the position and area of the above-mentioned third glue receiving groove 233 correspond to those of the first glue receiving groove 26221, and the projection area on the pen cap 23 is larger than the projection area of the second convex portion 231 thereon. Therefore, the above-mentioned second convex portion 231 is located within the third glue receiving groove 233.

[0126] Figure 14 For Figure 10 the schematic structural diagram of the pen cap in Figure 14 As shown, in some embodiments, a fourth convex portion 234 is provided on the outer wall of the pen cap 23. The fourth convex portion 234 is used for interference fit with the inner wall of the pen barrel 21 to achieve stable connection between the pen cap 23 and the pen barrel 21.

[0127] Embodiment III

[0128] Figure 15 is a schematic cross-sectional structural diagram of an electronic pen provided by another embodiment of the present application. As Figure 15 shown, in this embodiment, the main body portion 261 includes a pen core body 261a and a pen cap 23. The pen cap 23 is connected to the pen core body 261a, and the second limiting structure 262 is located on the pen cap 23, as Figure 15 in the areas framed by the dashed box e and the dashed box f in Figure 16 and Figure 17 shown. In this embodiment, the pen cap 23 can be directly connected to the pen core body, or can be connected through a connecting member 28 and / or a connecting structure, which can be determined according to actual use needs. When the pen cap is connected through the connecting member 28 and / or the connecting structure, the connecting member 28 can adopt the same body as the above-mentioned limiting member structure, except that the outer edge of the connecting member 28 may not contact the pen barrel, as Figure 16 is a schematic cross-sectional structural diagram of an electronic pen provided by another embodiment of the present application, Figure 17 For Figure 16 the partial enlarged structural diagram at E in

[0129] The pen cap 23 is connected to the pen barrel 21. A first limiting structure 27 is formed on the end face of the pen barrel 21 near the second port 21c. As described above, the pen cap 23 can be inserted into, threadedly connected to, or connected to the pen barrel 21 in other ways.

[0130] By adopting the solution provided in this embodiment, compared with the first and second embodiments, it is not necessary to additionally provide a second limiting structure on the pen core body 261a, nor to additionally provide a first limiting structure on the pen barrel 21, and the relative position of the pen core body 261a and the pen barrel 21 can be fixed. The structure of the electronic pen 20 is simple, highly feasible, without any additional cost or with a relatively low additional cost required, low manufacturing cost, and easy to install, and can be directly applied to existing electronic pens.

[0131] Based on the third embodiment, the first limiting structure 27 can be located on the inner wall of the pen barrel 21 at a certain distance from the second port 21c, can also be provided on the end face of the pen barrel 21 near the second port 21c, or can be directly formed by the end face of the pen barrel 21 near the second port 21c. When the first limiting structure 27 is directly formed by the end face of the pen barrel 21 near the second port 21c, the structure of the pen barrel 21 is simple and no additional structure needs to be provided. At this time, the outer diameter of the part of the pen cap 23 protruding from the pen barrel 21 can be the same as the outer diameter of the pen barrel 21, can also be larger than the outer diameter of the pen barrel 21, or larger than the inner diameter of the pen barrel 21 but smaller than the outer diameter of the pen barrel 21, as long as the limiting of the pen core body 261a can be achieved.

[0132] Based on the above embodiments, the setting method of the first limiting structure 27 can adopt the setting method of the above first step structure 24, that is, including a first step surface (i.e., the first limiting surface 271), only the position moves from near the first port 21b towards the second port 21c. The above first limiting surface 271 is substantially parallel to the radial direction Y of the pen barrel 21, as Figure 11 shown. Substantially parallel means that the two can be parallel or can form an angle within 10°. At this time, the second limiting structure 262 can adopt the setting method of the above second step structure 25, that is, including a second step surface (i.e., the second limiting surface), only the position moves from near the first port 21b towards the second port 21c. Among them, the second limiting surface faces the tip 221 of the pen core assembly, and the second limiting surface is substantially parallel to the radial direction of the pen barrel and is also substantially perpendicular to the pen core body 261a or the length direction of the pen core assembly. The above length direction of the pen core body 261a or the pen core assembly is the axial direction of the pen barrel.

[0133] The first limiting structure 27 and the second limiting structure 262 are arranged by adopting the scheme provided in this embodiment. Compared with the scheme of using the first step structure 24 and the second step structure 25 for limiting, the setting mode of the limiting structure can be not changed, and the positions of the refill body 261a and the pen barrel 21 can be limited without adding new structural parts. In this way, the first limiting structure 27 and the second limiting structure 262 can be obtained by adjusting the shape or position of some molds (the above operation is also called die repair and incorporation). In this way, no new manufacturing cost is increased, or the newly added manufacturing cost is relatively low, so that the manufacturing cost of the electronic pen 20 is relatively low, which is convenient for adjusting the existing production line.

[0134] The above-mentioned first limiting surface 271 can be an annular surface or can include a plurality of spaced-apart planes. When the first limiting surface 271 is an annular surface, if the first limiting surface 271 is located in the middle of the pen barrel 21, the inner wall of the pen barrel 21 includes at least two parts. For example, the inner wall of the pen barrel 21 includes a first part and a second part, the maximum inner diameter of the first part is smaller than the maximum inner diameter of the second part, and the first part and the second part are connected by the first limiting surface 271. When the first limiting surface 271 includes a plurality of spaced-apart parts, the first limiting structure 27 includes grooves formed on the inner wall of the pen barrel 21. There are a plurality of grooves, and the plurality of grooves are spaced apart. The grooves communicate with the accommodating cavity 21a. One end of the groove close to the second port 21c is open, and the side wall of the groove close to the first port 21b forms the first limiting surface 271.

[0135] Figure 18 For Figure 9 the partial enlarged structural schematic diagram at D in Figure 18 As shown in the figure, on the basis of the above embodiments, in some embodiments, a necking structure 21d is generally arranged at the end of the pen barrel 21 corresponding to the first port 21b, and the inner diameter dimension of the necking structure 21d is generally smaller than the inner diameter dimension of other parts of the pen barrel 21. The inner wall of the necking structure 21d is provided with a first guiding structure 21e. The first guiding structure 21e is used for sliding contact with the refill assembly 261a during the process of thermal expansion and contraction of the pen barrel 21. The first guiding structure 21e can also be an inclined surface, a curved surface, etc., which can be specifically determined according to the use requirements. The setting of the first guiding structure 21e can enable the pen barrel 21 to slide contact with the refill body 261a during the process of thermal expansion and contraction, rather than hard collision, even if they come into contact, so as to reduce the acting force between the two and reduce the risk of cracking of the pen barrel 21.

[0136] To achieve the above effects, in addition to providing the first guiding structure on the pen barrel, a second guiding structure 22a may also be provided on the outer wall of the refill assembly. The second guiding structure 22a may be an inclined surface, a curved surface, etc., which can be determined according to specific usage requirements. The second guiding structure 22a is used to slidably contact at least a part of the inner wall of the pen barrel 21 during the process of thermal expansion and contraction of the pen barrel 21.

[0137] Since during the process of thermal expansion and contraction of the pen barrel 21 affected by temperature, the area where the above-mentioned necking structure 21d is located is prone to friction or hard collision with the pen core body 261a, the second guiding structure 22a may be provided in the area corresponding to the position of the necking structure 21d. This area includes the corresponding area of the necking structure 21d of the pen barrel 21 before deformation, and the area that the necking structure 21d will pass through within a preset temperature range, etc. In this way, the setting of the second guiding structure 22a can enable the pen barrel 21 to slidably contact rather than hard collide with the pen core body 261a even when they come into contact during the process of thermal expansion and contraction of the pen barrel 21, thereby reducing the acting force between the two and reducing the risk of cracking of the pen barrel 21.

[0138] When the electronic pen is provided with both the first guiding structure 21e and the second guiding structure 22a, the two can be arranged at intervals in the radial direction of the pen barrel, and when their structures are the same, they can be arranged opposite to each other, which is convenient for processing, and the first guiding structure 21e and the second guiding structure 22a can slidably contact during use.

[0139] In some embodiments, both the first guiding structure 21e and the second guiding structure 22a are conical surfaces. In this way, the structures of the first guiding structure 21e and the second guiding structure 22a are simple and convenient to prepare.

[0140] Figure 19 It is a schematic partial cross-sectional structure diagram of the electronic pen 20 provided by another embodiment of the present application. As Figure 19As shown, based on the above embodiments, the first step structure 24 and the second step structure 25 can be removed or retained. It should be noted that if the first step structure 24 and the second step structure 25 are retained, they no longer contact each other and no longer play a limiting role. For example, in some embodiments, a first step structure 24 is formed on the inner wall of the pen barrel 21. The first step structure 24 is located between the first limiting structure 27 and the first port 21b. A second step structure 25 is formed on the outer wall of the refill assembly 26. The second step structure 25 is located between the first step structure 24 and the first limiting structure 27, and the second step structure 25 is disposed opposite to the first step structure 24, and an activity space is formed therebetween. It should be noted that in this embodiment, the second step structure 25 and the first step structure 24 do not abut against each other, but are spaced apart to form the above-mentioned activity space. This can reduce the risk of hard collision or friction between the first step structure 24 and the refill body 261a, and further reduce the risk of cracking of the pen barrel 21.

[0141] In some embodiments, in the axial direction X of the pen barrel 21, the length of the activity space is greater than or equal to the maximum position movement amount of the first step structure 24 within a preset temperature range. The preset temperature range can be determined according to the application environment of the electronic pen 20. For example, if the electronic pen 20 is used for daily use, the temperature range for daily use is approximately between -40°C and 40°C. At this time, the preset temperature range can be [-40°C, 40°C], or [-30°C, 40°C] or [-50°C, 50°C], which can be specifically determined according to the usage requirements. The maximum position movement amount is the difference between the position at the maximum temperature and the position at the minimum temperature of the first step structure 24 within the preset temperature range. For example, if the preset temperature range is [-40°C, 40°C], a certain reference point on the first step structure 24 is at position C at -40°C and at position D at 40°C, then the maximum position movement amount is the distance between position D and position C in the axial direction X of the pen barrel 21. By adopting this solution, during the process of thermal expansion and contraction, the first step structure 24 and the second step structure 25 are not likely to contact each other, thereby reducing the risk of cracking of the pen barrel 21.

[0142] It can be understood that the solutions provided in the embodiments of the present application, except for the first embodiment, can be applied to all refill positioning method scenarios and all scenarios of solving pen barrel cracking through refill positioning.

[0143] Finally, it should be noted that the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pen barrel is applied to an electronic pen. The electronic pen further includes a refill assembly. A receiving cavity is provided in the pen barrel. The receiving cavity has a first port and a second port which are oppositely arranged. The opening area of the first port is smaller than that of the second port. A part of the refill assembly is located in the receiving cavity. It is characterized in that, The inner wall of the pen barrel is provided with a first limiting structure, and the first limiting structure is used to cooperate with a second limiting structure on the refill assembly to limit the moving range of the refill assembly relative to the pen barrel; Wherein, in the axial direction of the pen barrel, the distance between the first limiting structure and the first port is greater than or equal to 1 / 2 of the length of the pen barrel.

2. The pen holder according to claim 1, characterized in that, The distance between the first limiting structure and the first port is greater than or equal to 3 / 4 of the length of the pen barrel.

3. The pen holder according to claim 1 or 2, characterized in that, The first limiting structure includes a first limiting surface facing the second port, the first limiting surface is substantially parallel to the radial direction of the pen barrel, and the first limiting surface is used for abutting and cooperating with the second limiting structure.

4. The pen holder according to any one of claims 1 to 3, characterized in that, The end face of the pen barrel near the second port forms the first limiting structure.

5. The pen holder according to any one of claims 1-4, characterized in that, The end of the pen barrel corresponding to the first port is provided with a necking structure, and a first guiding structure is formed on the inner wall of the necking structure, and the first guiding structure is used for sliding contact with the refill assembly during the process of thermal expansion and contraction of the pen barrel.

6. A refill assembly is applied to an electronic pen, and the electronic pen further includes a pen barrel as described in any one of claims 1-5. A part of the refill assembly is located in the accommodating cavity, and it is characterized in that The refill assembly includes a main body portion and a second limiting structure, the second limiting structure is connected to the main body portion, and at least part of the second limiting structure protrudes from the side wall of the main body portion to form a first convex portion, and the first convex portion is used for cooperating with the first limiting structure to limit the moving range of the main body portion relative to the pen barrel.

7. The refill assembly according to claim 6, wherein, The first convex portion has a second limiting surface, the second limiting surface faces the nib of the refill assembly, and the second limiting surface is substantially perpendicular to the length direction of the refill assembly, and the second limiting surface is used for abutting and cooperating with the first limiting structure.

8. The refill assembly according to claim 6 or 7, characterized in that, The main body portion includes a refill body, and the second limiting structure is located on the refill body.

9. The refill assembly according to claim 8, wherein, The refill body has a first end and a second end arranged opposite to each other in the axial direction, the first end is provided with a nib, and the second limiting structure is arranged at the second end.

10. The refill assembly according to claim 9, characterized in that, The second limiting structure includes a limiting member, the limiting member is located on the side of the second end away from the first end and is connected to the second end.

11. The refill assembly according to claim 10, characterized in that The main body portion further includes a pen cap, a connecting structure is provided on the side of the limiting member away from the main body portion, the refill body is connected to the pen cap through the connecting structure, and the pen cap is used for sealing connection with the pen barrel.

12. The refill assembly according to claim 11, wherein, The connecting structure includes a first glue receiving groove, the first glue receiving groove is used for supporting an adhesive, and the first glue receiving groove is connected to the pen cap through the adhesive.

13. The refill assembly according to claim 12, characterized in that, A separating portion protrudes from the bottom of the first glue receiving groove, and the separating portion divides the first glue receiving groove into a plurality of grooves.

14. The refill assembly according to claim 13, wherein, A second convex portion is provided on the surface of the pen cap facing the groove, and at least part of the second convex portion is inserted into one of the grooves.

15. The refill assembly according to claim 14, characterized in that, A second glue receiving groove is provided on the bottom surface of the second convex portion facing the groove, and the second glue receiving groove is used for allowing part of the adhesive to enter.

16. The refill assembly according to claim 14 or 15, characterized in that, In the depth direction of the first glue receiving groove, the depth of the first glue receiving groove is less than the depth of the groove corresponding to the second convex portion.

17. The refill assembly according to any one of claims 12-16, characterized in that, One side of the pen cap facing the limiting member is provided with a third glue receiving groove, which is arranged opposite to the first glue receiving groove, and the third glue receiving groove is used for allowing part of the adhesive to enter.

18. The refill assembly according to any one of claims 10-17, characterized in that, The limiting member is welded to the pen core body.

19. The refill assembly according to claim 18, characterized in that, A positioning structure is provided between the limiting member and the pen core body, and the positioning structure is used for defining the relative positions of the limiting member and the pen core body.

20. The refill assembly according to claim 19, wherein, The pen core body includes a bracket, one end of the bracket facing the limiting member is open, and the positioning structure includes a third convex portion protruding from the limiting member facing the bracket, and the third convex portion is in plug-in fit with the bracket.

21. The refill assembly according to claim 6 or 7, characterized in that, The main body portion includes a pen core body and a pen cap, the pen cap is connected to the pen core body, the second limiting structure is located on the pen cap, and the pen cap is used for sealing connection with the pen barrel.

22. The refill assembly according to any one of claims 6-21, characterized in that, A second guiding structure is provided on the outer wall of the pen core assembly, and the second guiding structure is located between the second limiting structure and the tip of the pen core assembly, and the second guiding structure is used for slidingly contacting at least part of the inner wall of the pen barrel during the process of thermal expansion and contraction of the pen barrel.

23. An electronic pen, characterized in that, Comprising the pen barrel according to any one of claims 1-5 and the pen core assembly according to any one of claims 6-22, a part of the pen core assembly is located in the accommodating cavity, and the movement range of the pen core assembly in the pen barrel is defined by the second limiting structure and the first limiting structure, and a part of the pen barrel between the first limiting structure and the first port is in clearance fit with the pen core assembly.

24. The electronic pen according to claim 23, characterized in that, A first step structure is formed on the inner wall of the pen barrel, and the first step structure is located between the first limiting structure and the first port. A second step structure is formed on the outer wall of the pen core assembly, and the second step structure is located between the first step structure and the first limiting structure, and the second step structure is arranged opposite to the first step structure, and an activity space is formed therebetween; the activity space is used for allowing the first step structure to move relative to the second step structure when the pen barrel undergoes thermal expansion and contraction.

25. The electronic pen according to claim 24, characterized in that, In the axial direction of the pen barrel, the length of the activity space is greater than or equal to the maximum position movement amount of the first step structure relative to the second step structure within a preset temperature range.

26. The electronic pen according to claim 23, characterized in that, The end of the pen barrel corresponding to the first port is provided with a necking structure, a first guiding structure is formed on the inner wall of the necking structure, a second guiding structure is formed on the outer wall of the pen core assembly, the second guiding structure and the first guiding structure are arranged opposite to each other in the radial direction of the pen barrel, and the second guiding structure is used for slidingly contacting the first guiding structure during the process of thermal expansion and contraction of the pen barrel.

27. An electronic device, characterized in that, Comprising a host and the electronic pen according to any one of claims 23-26, and the electronic pen is communicatively connected to the host.

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