Pen container, refill assembly, electronic pen and electronic equipment

Abstract

The invention provides a pen container, a refill assembly, an electronic pen and electronic equipment. The pen container is applied to the electronic pen, and the electronic pen further comprises a refill assembly. A containing cavity is formed in the pen container. The containing cavity is provided with a first port, and the first port is used for allowing a pen point in the refill assembly to penetrate out. Part of the refill assembly is located in the containing cavity. A first limiting structure is arranged on the inner wall of the pen container and used for being matched with a second limiting structure on the refill assembly to limit the moving range of the refill assembly relative to the pen container. In the axial direction of the pen container, the distance between the first limiting structure and the first port is larger than or equal to 1 / 2 of the length of the pen container. According to the pen container, the refill assembly, the electronic pen and the electronic equipment, the risk that the pen container cracks can be reduced.

Description

Technical Field

[0001] The present application relates to the field of handwriting input, and in particular to a pen holder, a refill assembly, an electronic pen and an electronic device. Background Art

[0002] Touch screens allow users to directly operate the content on the screen with their fingers or other touch tools (such as styluses, handwriting pens and other electronic pens), which improves the convenience and intuitiveness of operation. Compared with fingers, electronic pens have a smaller contact area and can achieve higher precision and accuracy, so they are widely used. However, the current electronic pen barrel is prone to cracking in winter or other low-temperature environments. Summary of the invention

[0003] The present application provides a pen holder, a pen core assembly, an electronic pen and an electronic device, which improve the problem that the existing pen holder is prone to cracking.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] In a first aspect, a pen holder is provided. The pen holder is applied to an electronic pen, and the electronic pen also includes a refill assembly. A storage chamber is arranged in the pen holder. The storage chamber has a first port and a second port arranged opposite to each other, and the opening area of ​​the first port is smaller than the opening area of ​​the second port. Part of the refill assembly is located in the storage chamber. A first limiting structure is arranged on the inner wall of the pen holder, and the first limiting structure is used to cooperate with the second limiting structure on the refill assembly to limit the movement range of the refill assembly relative to the pen holder. In the axial direction of the pen holder, the spacing between the first limiting structure and the first port is greater than or equal to 1 / 2 of the length of the pen holder.

[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 consistent, only the contraction force of the half or less area of ​​the pen barrel close to the second port in the axial direction will be converted into the thrust of the first step structure on the second step structure, so that the thrust is reduced by more than half, thereby reducing the risk of cracking of the pen barrel. In addition, the pen barrel can also be designed as a structure that shrinks from both ends to the middle by adjusting the material, structure, etc., that is, the middle area of ​​the pen barrel is set as its thermal expansion center area, so that the distance between the first limiting structure and the first port is greater than or equal to / of the length of the pen barrel, so that the two ends of the pen barrel can be respectively contracted toward the middle of the pen barrel, so that the first limiting structure and the second limiting structure are separated, or the first limiting structure drives the second limiting structure to move toward the middle area of ​​the pen barrel, and the first limiting structure will not apply a thrust to the second limiting structure, which can further reduce the risk of cracking of the pen barrel.

[0007] It can be seen that, compared with the electronic pen provided in the previous embodiment, by increasing the distance between the first limiting structure and the first port and matching the gap between the part of the pen barrel between the first limiting structure and the first port and the refill assembly, the pen barrel is less likely to collide with the refill assembly when it expands or contracts due to heat, or the mutual force between the two when they collide hard is smaller, thereby reducing the risk of cracking of the pen barrel.

[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. Compared with the distance between the first limiting structure and the first port being between 1 / 2 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, thereby reducing the risk of cracking of the pen barrel. 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 user experience of the electronic pen.

[0009] In some embodiments, the first limiting structure includes a first limiting surface arranged toward the second port, and the first limiting surface is roughly parallel to the radial direction of the pen barrel. The first limiting surface is used to abut and cooperate with the second 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 realize the position limitation of the pen core and the pen barrel. In this way, the first 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 integration), which does not increase the new production cost, 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.

[0010] In some embodiments, the end surface of the pen barrel near the second port forms a first limiting structure. In this way, the first limiting structure can be naturally formed by the original structure of the pen barrel without additional configuration, so that the structure of the electronic pen is simple, the feasibility is high, no additional cost is required, or the additional cost required is low, the manufacturing cost is low, and it is easy to install, and can be directly applied to existing electronic pens.

[0011] In some embodiments, the end of the pen barrel corresponding to the first port is provided with a constriction structure, and a first guide structure is formed on the inner wall of the constriction structure, and the first guide structure is used to make sliding contact with the pen core assembly during the thermal expansion and contraction of the pen barrel. The provision of the first guide structure can make the pen barrel and the pen core come into contact in a sliding manner during the thermal expansion and contraction, rather than a hard collision, so as to reduce the force between the two and reduce the risk of cracking of the pen barrel.

[0012] In a second aspect, a refill assembly is provided. The refill assembly is applied to an electronic pen, and the electronic pen also includes the pen holder provided in the above-mentioned embodiments. Part of the refill assembly is located in the accommodating cavity. The refill assembly includes a main body and a second limiting structure. The second limiting structure is connected to the main body, and at least a part of the second limiting structure protrudes from the side wall of the main body to form a first convex portion. The first convex portion is used to cooperate with the first limiting structure to limit the movement range of the main body relative to the pen holder. The effect of the second aspect is consistent with the effect 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 scheme 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 integration), so that 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 core body, and the second limiting structure is located on the core body. With the electronic pen provided in this embodiment, the second limiting structure can be set at different positions of the core as needed, such as the middle, a position close to the second port, etc., and there are many setting positions, and it can be directly connected to the side wall of the support of the core, and it can be realized by simply modifying the support manufacturing mold or manufacturing method, which is easy to prepare.

[0015] In some embodiments, the refill body has a first end and a second end that are disposed opposite to each other in the axial direction, the first end is provided with a pen tip, and the second limiting structure is provided at the second end. Compared with the second limiting structure being provided at the middle of the refill, when the pen barrel shrinks significantly due to the influence of temperature, the second limiting structure and the first limiting structure will not cause a hard collision with the refill, which can further reduce the risk of cracking of the pen barrel.

[0016] In some embodiments, the second limiting structure includes a limiting member, which is located on the side of the second end away from the first end and connected to the second end. The electronic pen provided by this embodiment can be used without changing the structure of the existing pen core. By adding a limiting member at the tail of the pen core to form a second limiting structure, the movement range of the pen core in the pen barrel can be limited. Compared with setting the second limiting structure in the middle of the pen core, when the pen barrel shrinks significantly due to the influence of temperature, the second limiting structure and the first limiting structure will not cause a hard collision with the pen core, which can further reduce the risk of cracking of the pen barrel.

[0017] In some embodiments, the main body also includes a pen cap, a connection structure is provided on the side of the stopper away from the main body, the pen core body is connected to the pen cap through the connection structure, and the pen cap is used to be sealed with the pen barrel. The setting of the connection structure can make the position of the pen core in the pen barrel fixed by the pen cap.

[0018] In some embodiments, the connection structure includes a first adhesive groove, and the first adhesive groove is used to support the adhesive. The first adhesive 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 setting of the first adhesive groove can support the adhesive, reducing the risk of the adhesive entering the gap between the pen core and the pen barrel.

[0019] In some embodiments, the bottom of the first adhesive groove is provided with an isolating portion, and the isolating portion divides the first adhesive groove into a plurality of grooves. The isolating portion may be a plate, a cylinder or other structure, as long as the first adhesive groove can be divided into a plurality of grooves. The setting of the isolating portion divides the first adhesive groove into a plurality of grooves, so that the assembler can place different amounts of adhesive in different grooves according to the assembly requirements, thereby reducing the risk of adhesive waste.

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

[0021] In some embodiments, the second convex portion is provided with a second adhesive groove on a side facing the bottom surface of the groove body, and the second adhesive groove is used to allow part of the adhesive to enter. The provision of the second adhesive groove allows the adhesive in the first groove body to enter the first groove body during the buckling process of the pen cap, without blocking the buckling of the pen cap, and 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 groove depth direction of the first adhesive groove, the depth of the first adhesive groove is less than the depth of the groove body corresponding to the second protrusion. In this way, more adhesive can be contained in the groove body corresponding to the second protrusion, so that the contact area between the outer wall bonded to the second protrusion and the side wall of the second adhesive groove can be larger, which helps to improve the connection stability between the stopper and the pen cap.

[0023] In some embodiments, a third adhesive groove is provided on one side of the pen cap facing the stopper, the third adhesive groove is arranged opposite to the first adhesive groove, and the third adhesive groove is used to allow part of the adhesive to enter. The third adhesive groove is arranged so that when there is more adhesive in the first adhesive groove, after the pen cap is buckled onto the second port of the pen barrel, the excess adhesive can enter the third adhesive groove, which will not cause adverse effects on the buckling operation of the pen cap, and in this way, the contact area between the pen cap and the adhesive can be increased, thereby enhancing the connection stability between the pen cap and the stopper.

[0024] In some embodiments, the stopper is welded to the pen core, so that the connection between the bracket and the stopper is stable, and the mechanical strength of the assembly of the two is excellent.

[0025] In some embodiments, a positioning structure is provided between the position-limiting member and the refill body. The positioning structure is used to limit the relative position of the position-limiting member and the refill body. This allows the position of the bracket and the position-limiting member to be stable and not prone to movement when they are welded.

[0026] In some embodiments, the refill body includes a bracket, the bracket is open at one end facing the stopper, and the positioning structure includes a third protrusion protruding from the stopper toward the bracket, and the third protrusion is plugged into the bracket. The third protrusion can be inserted into the open port of the bracket and plugged into it to achieve the positioning function, so that when the bracket and the stopper are welded, the positions of the two are stable and not easy to move.

[0027] In some embodiments, the main body includes a core body and a cap, the cap is connected to the core body, the second limiting structure is located on the cap, and the cap is used to seal and connect with the pen barrel. Compared with the first and second embodiments, the solution provided by this embodiment does not need to be additionally provided with a second limiting structure on the core, so that the relative position of the core and the pen barrel can be fixed, so that the structure of the electronic pen is simple, the feasibility is high, no additional cost is required, or the additional cost required is low, the manufacturing cost is low, and it is easy to install, and can be directly applied to existing electronic pens.

[0028] In some embodiments, a second guide structure is provided on the outer wall of the refill assembly, the second guide structure is located between the second limiting structure and the pen tip of the refill assembly, and the second guide structure is used to slide in contact with at least part of the inner wall of the pen barrel during thermal expansion and contraction of the pen barrel. In this way, the second guide structure can make the pen barrel slide in contact with the refill during thermal expansion and contraction, rather than hard collision, so as to reduce the force between the two and reduce the risk of cracking of the pen barrel.

[0029] In a third aspect, an electronic pen is provided. The electronic pen comprises the pen barrel provided by the above embodiments and the pen core assembly provided by the above embodiments. 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 limited by the second limiting structure and the first limiting structure. The part of the pen barrel located between the first limiting structure and the first port is in clearance fit with the pen core assembly. The effect of the third aspect is consistent with the effect of the first aspect, and will not be repeated 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 pen core assembly. 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. A movable space is formed between the two. The movable space is used for the first step structure to move relative to the second step structure when the pen barrel expands and contracts. In this way, the risk of hard collision or friction between the first step structure and the pen core can be reduced, thereby reducing the risk of cracking of the pen barrel.

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

[0032] In some embodiments, a constriction structure is provided at the end of the pen barrel corresponding to the first port, a first guide structure is formed on the inner wall of the constriction structure, a second guide structure is formed on the outer wall of the pen core assembly, the second guide structure and the first guide structure are arranged opposite to each other in the radial direction of the pen barrel, and the second guide structure is used to slide in contact with the first guide structure during thermal expansion and contraction of the pen barrel. The arrangement of the second guide structure and the first guide structure can make the pen barrel slide in contact with the pen core during thermal expansion and contraction, rather than hard collision, even if the pen barrel comes into contact with the pen core, thereby reducing the force between the two and reducing the risk of cracking of the pen barrel.

[0033] In a fourth aspect, an electronic device is provided, comprising a host and the electronic pen provided in the above embodiments, wherein the electronic pen is in communication connection with the host. The effect of the fourth aspect is consistent with the effect of the third aspect, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the use status of an electronic device provided in an embodiment of the present application;

[0035] Figure 2 For along Figure 1 Schematic diagram of the cross-sectional structure of line AA in FIG.

[0036] Figure 3 A schematic diagram of the structure of the electronic pen provided in an embodiment of the present application;

[0037] Figure 4 A schematic diagram of an exploded structure of an electronic pen provided in one embodiment of the present application;

[0038] Figure 5 A schematic cross-sectional view of an electronic pen provided in one embodiment of the present application;

[0039] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure at point A in the middle;

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

[0041] Figure 8 A schematic cross-sectional view of an electronic pen provided in another embodiment of the present application;

[0042] Fig. 9 A schematic cross-sectional view of an electronic pen provided in another embodiment of the present application;

[0043] Fig.10 for Fig. 9 A schematic diagram of the local enlarged structure at C in FIG.

[0044] Fig.11 for Fig.10 A partial cross-sectional structural schematic diagram of a pen holder in FIG.

[0045] Fig.12 for Fig.10 A schematic cross-sectional structural diagram of a limiting member in FIG.

[0046] Fig.13 for Fig.10 A schematic cross-sectional view of the pen cap;

[0047] Fig.14 for Fig.10 A schematic diagram of the structure of the pen cap;

[0048] Fig.15 A schematic cross-sectional view of an electronic pen provided in another embodiment of the present application;

[0049] Fig.16 A schematic cross-sectional view of an electronic pen provided in another embodiment of the present application;

[0050] Fig.17 for Fig.16 A schematic diagram of the local enlarged structure at E in the middle;

[0051] Fig.18 for Fig. 9A schematic diagram of the local enlarged structure at D in FIG.

[0052] Fig.19 A schematic diagram of a partial cross-sectional structure of an electronic pen provided in another embodiment of the present application.

[0053] Description of reference numerals:

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

[0055] 111, frame; 112, shell; 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, pen tip; 222, bracket; 223, battery; 224, control module; 225, pressure sensing module; 231, second convex portion; 232, second adhesive groove; 233, third adhesive groove; 234, fourth convex portion; 271, first limiting surface; 261, main body; 261a, refill body; 262, second limiting structure; 262a, first convex portion; 262b, third convex portion;

[0056] 2221, first frame; 2222, second frame; 26221, first adhesive containing groove; 26222, isolation part; 26223, first groove; 2621, limiter; 2622, connection structure;

[0057] k. Activity space. DETAILED DESCRIPTION

[0058] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0059] In the description of the present application, it should be understood that the terms "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 understood as a limitation on the present application.

[0060] In order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. For example, the first limiting portion and the second limiting portion are only used to distinguish different limiting portions, and do not limit their order. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not necessarily limit them to be different.

[0061] It should be noted that, in this application, the words "in one embodiment" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described in this application as "in one embodiment" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the words "in one embodiment" or "for example" is intended to present the relevant concepts in a specific way.

[0062] In this application, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0064] Touch screens (also known as touch screens) 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 through fingers or other touch tools (such as styluses, styluses, etc.), which improves the convenience and intuitiveness of operation. Among them, styluses and styluses are tools designed for writing, drawing or interacting on electronic devices. Styluses can realize multiple functions such as clicking, sliding, and long pressing to simulate the operation of fingers on touch screens. Styluses focus more on the experience of writing and drawing. They are commonly found on digital drawing boards, 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 is understandable that there is not much difference between styluses and styluses, and with the development of technology, the functions of the two are gradually integrated. Therefore, some electronic pens can realize the functions of both styluses and styluses, and can be called styluses or styluses. But both styluses and styluses can be collectively referred to as electronic pens. For ease of description, the tool capable of writing, drawing or interacting on an electronic device will be referred to as an electronic pen in the following description.

[0065] Electronic pens can be divided into many 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. The resistance value of the touch screen is changed by the touch pressure of the electronic pen, so as to locate the touch position of the electronic pen and / or move the handwriting. Electromagnetic electronic pens interact 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 by the electronic pen, thereby locating the touch position of the electronic pen and / or moving the handwriting. They have high sensitivity and stability and are widely used in electronic devices such as smart phones and tablets. Capacitive electronic pens can be divided into passive capacitive pens and active capacitive pens. Among them, passive capacitive pens do not need to be charged, also known as passive capacitive pens, which are suitable for most tablets and mobile phones, but do not have pen pressure sensing and anti-mistouch functions. Active capacitive pens generally need to be charged or use batteries, also known as active capacitive pens, some of which support pen pressure sensing and anti-mistouch functions, but need to match the corresponding device model.

[0066] An embodiment of the present application provides an electronic device having an electronic pen. The electronic device may also be referred to as user equipment (UE) or terminal, etc., and may be a mobile phone, computer, personal digital assistant (PDA) device, computing device, vehicle-mounted device, wearable device, virtual reality (VR) terminal device, augmented reality (AR) terminal device, industrial control (industrial control) terminal device, self-driving device, remote medical device, electronic education device (such as electronic dictionary pen, point reading machine, etc.), learning machine (such as smart translation pen, scanning pen, etc.), 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 electronic device.

[0068] Figure 1 This is a schematic diagram of the use status of the electronic device provided in the embodiment of the present application. Figure 1 As shown, the mobile phone includes a host 10 and an electronic pen 20. The host 10 is the main body of the mobile phone, including a support device 11 and a touch screen 12 arranged on the support device 11. The support device 11 includes at least one frame 111. When there are more than two frames 111, two adjacent frames 111 are rotatably connected through a rotating shaft structure. At this time, the ends of the 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, and the mobile phone can be folded or unfolded accordingly. Figure 2 For along Figure 1 The cross-sectional structure diagram of the AA line in FIG. Figure 2 As shown, in addition to the frame and the shaft structure, the support device 11 may also include a shell 112 , etc. The shell 112 is installed on the frame 111 and forms a receiving space 113 together 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, and any touch screen 12 is covered on one of the large surfaces of the support device 11, and the display area of ​​the touch screen 12 is exposed to facilitate the presentation of 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 dimensions in height. The support device 11 has two large surfaces, and the above-mentioned large surfaces refer to the two surfaces with the largest area and oppositely arranged in the support device 11 when there is one frame 111; when there are multiple frames 111, the two surfaces with the largest area and oppositely arranged in the unfolded state of the support device 11. When there are multiple touch screens 1212, in general, the two large surfaces of the support device 11 are generally provided with touch screens 12, and the number of touch screens 12 on each large surface can be determined according to the use needs, such as one touch screen 12 is provided on one of the large surfaces, 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 supporting device 11 includes a frame 111, the touch screen 12 can adopt a flexible screen or a rigid screen; when the supporting device 11 includes multiple frames 111, and the touch screen 12 covers multiple frames 111, the touch screen 12 generally adopts a flexible screen and can be folded or unfolded according to the position change between adjacent frames 111.

[0071] like Figure 2 As 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, which is used to detect the user's touch input. It is usually a transparent layer with a touch response 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 perform touch operations directly on the touch screen 12. The touch sensor 121 can sense information such as touch position, pressure size, 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, which is located between the touch sensor 121 and the control chip 132 of the electronic device (such as a central processing unit, a system chip, etc.), and is electrically connected to both. 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, slides, long presses, etc., and sends the processing results to the control chip 132 for further processing. All components of the touch control module 122 work together to detect, process and respond to touch inputs. In addition, the touch control module 122 may also involve interfaces connected to the display screen 123 and other electronic components in the electronic device.

[0073] The display screen 123 is a part of the touch screen 12 for displaying information such as images, text, and videos. It is usually closely attached to the touch sensor 121. There are various types of display screens 123, including liquid crystal displays (LCD) and organic light emitting diode displays (OLED). LCD displays images by controlling the light transmittance of liquid crystals, while OLED has self-luminous properties 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 glue, water glue or other types of adhesives. Their main function is to tightly fit 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 damage 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, but can also be resin, or other layers with high strength and wear resistance that do not affect the emission of light. This protective layer 14 can prevent impurities such as dust and moisture from entering the inside of the touch screen 12.

[0075] like Figure 2As shown, in addition to the support device 11 and the touch screen 12, the host 10 generally 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 each circuit board 131 is provided with electronic components. 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 chip (System on Chip, SoC), a central processing unit (Central Processing Unit, CPU), etc.), a camera module 133, a UFS (short for UNIX file system), an intelligent algorithm chip, an antenna module, a Bluetooth module, a wireless connection (Wireless Fidelity, WiFi) module, a global positioning system (Global Positioning System, GPS) module, a power supply and charging module, and a screen display and operation module. One or more of the above electronic components can be set on each circuit board 131, or other electronic components not listed above can be set according to the needs of use, and the specific setting method can be determined according to the needs of use. The screen display and operation module includes but is not limited to multiple submodules such as display drive circuit, processor, memory, input and 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 realize functions such as touch input, information processing and display output.

[0076] The host 10 and the electronic pen 20 can be electrically connected through wires, or can be wirelessly connected through a Bluetooth network or a near field communication (NFC) network to achieve wireless signal interaction. When the host 10 and the electronic pen 20 are connected through a wireless connection, the electronic pen 20 can move freely without being constrained by wires. 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 remotely, such as unlocking or locking the host 10, answering or hanging up a call, etc.

[0077] The electronic pen 20 is an active capacitive pen. The electronic pen 20 contains one or more capacitor structures. When the pen tip 221 (usually made of conductive material) of the electronic pen 20 slides on the conductive layer of the touch screen 12, the pen tip 221 and the touch screen 12 will form a variable capacitor. The two plates of this capacitor are the pen tip 221 and the touch screen 12. As the pen tip 221 moves on the touch screen 12, the distance and relative area between the two plates of the capacitor will change, causing the capacitance value of the capacitor to change. The corresponding chip in the electronic device (such as the control chip 132, the 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 according to the change of the above-mentioned capacitance value.

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

[0079] Figure 4 This is a schematic diagram of the exploded structure of an electronic pen provided in one embodiment of the present application. Figure 4 As shown, the pen core 22 includes a pen tip 221, a bracket 222, a battery 223, a control module 224 and a pressure sensing module 225. Among them, the pen tip 221 includes a capacitive sensor and an insulating layer coated on the outside of the capacitive sensor. The capacitive sensor is the core component of the pen tip 221, which is used to detect the capacitance change between the pen tip 221 and the touch screen 12. When the pen tip 221 approaches or contacts the touch screen 12, due to the principle of capacitive sensing, an electric field will be formed between the pen tip 221 and the touch screen 12, and the change of this electric field will be captured by the capacitive sensor. The capacitive sensor can accurately sense the position, movement and possible pressure changes of the pen tip 221, and 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 capacitive 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 pen tip 221. The electric field formed between the metal electrode and the touch screen 12 changes as the pen tip 221 approaches or contacts, and this change is captured by the capacitive sensor and converted into an electrical signal. The insulating layer is used to prevent the current from flowing directly to the touch screen 12 through the pen tip 221, thereby protecting the touch screen 12 and the electronic pen from damage. The insulating layer ensures that the capacitive sensor can work properly and protects the safety of the touch screen 12 and the electronic pen.

[0080] The pen tip 221 is connected to the pressure sensing module 225, and can transmit its own force 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 and / or communicatively connected to the control module 224. According to the use requirements, one or more pressure sensors can be set in the pressure sensing module 225, such as a pressure sensor can be set to sense the force of the pen tip 221 in the axial direction of the pen barrel 21, and two pressure sensors can also be set, one of which is used to sense the force of the pen tip 221 in the axial direction of the pen barrel 21, and the other is used to sense the force of the pen tip 221 in the radial direction of the pen barrel 21. The pressure sensing module 225 is used to receive the pressure transmitted by the pen tip 221 and 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 the pressure sensing module 225, the host 10 and other components, 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 may include but are not limited to a control module, a communication module, a power management chip, etc. Among them, the control module may be a microcontroller unit (MCU) or a digital signal processing chip (DSP) or other control modules. The control module is the core of the control module 224, responsible for receiving and processing signals from the pressure sensing module 225, the host, etc. The microcontroller or DSP can execute complex algorithms to achieve accurate analysis and processing of signals. The communication module includes a module 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 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 voltage and current regulation of the battery 223. The power management chip can maintain a stable power supply for the electronic pen 20 during long-term use and extend the service life of the battery 223.

[0082] In addition, the control module 224 may also include a memory chip, passive components, an interface circuit, an indicator light, etc. Among them, the memory chip is used to store the configuration information of the electronic pen 20, firmware updates, etc. Although the memory 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. Passive components can be resistors, capacitors, inductors, etc., which play the role of filtering, voltage stabilization, current limiting, etc. in the circuit, helping the control module 224 to achieve more accurate signal processing and more stable power supply. The interface circuit includes an interface circuit 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 status of the electronic pen 20 (such as charging status, connection status, etc.).

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

[0084] The battery 223 can be a disposable battery (such as an alkaline battery, an acid zinc-manganese battery, or other non-rechargeable battery) or a rechargeable battery (such as a lead-acid battery, a nickel-cadmium battery, a lithium-ion battery, etc.), and is used to power the electronic components in the pen core 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 electrically connected to the pressure sensing module 225 through the control module 224, or can be electrically connected to the control module 224, the pen tip 221, and the pressure sensing module 225 respectively through the above-mentioned electrical connectors, which can be determined according to the specific use requirements.

[0085] When the user writes or draws on the touch screen 12 with the electronic pen 20, the pen tip 221 will apply a certain amount of pressure to the touch screen 12. The pressure sensing module 225 can sense the change in pressure and convert it into an electrical signal. This electrical signal is usually an analog signal, indicating 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 digitize 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 host (such as a tablet computer, smart phone, etc.) connected to it through the communication module.

[0086] The host then processes and analyzes the digital signal to determine the strength of the user's writing, and adjusts the thickness of the line displayed on the touch screen 12 according to the analysis result. For example, in a painting software, a greater writing strength may produce a thicker line, while a smaller writing strength may produce a thinner line.

[0087] The bracket 222 can be an integral structure or a combination of multiple parts. When the bracket 222 is an integral structure, it can be a tubular structure, a plate structure, or other structures, as long as the installation of the battery 223, the control module 224, and the pressure sensing module 225 can be achieved. When the bracket 222 is a combination of multiple parts, the bracket 222 can include at least two groups of sub-parts, and a single group of sub-parts can be used for the installation of at least one module among the battery 223, the control module 224, and the pressure sensing module 225, and two adjacent sub-parts can be connected by welding, plugging, etc.

[0088] For example, in some embodiments, the bracket 222 includes two groups of sub-parts, which are respectively named as the first frame 2221 and the second frame 2222. The first frame 2221 is a battery bracket, which is used to support and limit the position of the battery 223. The second frame 2222 is connected to the first frame 2221 and is used to carry the control module 224. A shell may be provided outside the pressure sensing module 225, and in this case, the second frame 2222 is also connected to the shell of the pressure sensing module 225. If no shell is provided outside the pressure sensing module 225, the bracket 222 may also include a third frame, which is used to carry the pressure sensing module 225 and is connected to the second frame 2222.

[0089] In addition, the electronic pen 20 may also be provided with a charging interface and buttons. The charging interface (such as a Type-C interface, etc.) is electrically connected to the battery 223 for charging the battery 223. The buttons can be set with multiple functions (such as a button for controlling the electronic pen 20 to turn on or off, a button for switching functions, etc.) according to usage needs, and are generally electrically connected to the control module 224.

[0090] Figure 5 This is a schematic cross-sectional view of an electronic pen provided in one embodiment of the present application. Figure 6 for Figure 5 The local enlarged structural diagram of A in the figure. Figure 5 and Figure 6As shown, a receiving chamber 21a is provided in the pen barrel 21, and both ends of the receiving chamber 21a are open. The receiving chamber 21a has a first port 21b and a second port, and the opening area of ​​the first port 21b is smaller than the opening area of ​​the second port. The pen core 22 is inserted into the pen barrel 21, and at least part of the pen tip 221 passes through the first port 21b of the pen barrel 21. In order to make the position of the pen tip 221 and the pen barrel 21 relatively fixed, a limiting structure is generally provided, and 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 pen core 22. When the pen core 22 is inserted into the receiving chamber 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 pen core 22 can no longer move toward the direction where the pen tip 221 is located. At this time, at least part of the pen tip 221 passes through the first port 21b of the pen barrel 21 and is exposed to the outside, and the length exposed to the outside is a preset length.

[0091] The first step structure 24 is arranged near the first port 21b, and most of the parts in the pen core 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 PC material is about (5-7)×10^-5 / ℃, and the thermal expansion and contraction coefficient refers to the amount of change in the length of a one-meter-long solid material when the temperature rises by one degree Celsius. According to the formula △L=α×△T×L, 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. In this way, when the length of the pen barrel at the initial temperature (25℃) is 153mm, the contraction length of the pen barrel at -10℃ is within (0.26mm, 0.38mm), which is about 0.3mm.

[0092] The thermal expansion and contraction coefficient of metal materials is generally smaller than that of plastic materials. Therefore, in winter or in a low-temperature environment, the volume of the pen barrel 21 shrinks significantly due to the influence of temperature (especially in the axial direction X of the pen barrel 21), and it will receive continuous internal stress in a low-temperature environment, while the volume of the pen core 22 does not shrink significantly due to the influence of temperature. Since the second step structure 25 is at a short distance from the pen tip 221 (generally less than or equal to 1 / 10 of the length of the pen barrel), the pen barrel 21 will collide hard with the pen core 22 in the axial direction after shrinking, which makes the pen barrel 21 easy to crack at the first step structure 24. Figure 7 This is a schematic diagram of the cracking of an electronic pen provided in an embodiment of the present application. Figure 7 As shown in the figure, the electronic pen may crack in the form of a ring-shaped crack at the first step structure. 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] In order to improve or at least partially improve the above problem, another embodiment of the present application provides an electronic pen. The electronic pen changes the position of the limiting structure between the pen core and the pen barrel, increases the distance between the limiting structure and the first port of the pen barrel, and makes the pen barrel and the pen core have a clearance fit, so that when the pen barrel shrinks due to the influence of temperature, it can avoid contact or friction with the pen core, or reduce the force between the pen barrel and the pen core in the above process, thereby reducing the risk of cracking of 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 is provided with a receiving chamber 21a, and both ends of the receiving chamber 21a are open. 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 can be understood that Figure 8 The second port 21c is partially closed by the pen cap 23, and the outer edge of the second port 21c is flush with the end surface of the pen barrel 21 away from the pen core 221. The pen core assembly 26 is partially located in the accommodating cavity 21a. The pen core assembly 26 can include only the above-mentioned pen core 22, or can include both the above-mentioned pen core 22 and the pen cap 23, which can be determined according to the use requirements.

[0095] The inner wall of the pen barrel 21 is provided with a first limiting structure 27. The pen core assembly 26 includes a main body 261 and a second limiting structure 262. The main body 261 may include only the above-mentioned pen core 22, or may include both the above-mentioned pen core 22 and the pen cap 23, which may be determined according to the use requirements. The second limiting structure 262 is connected to the main body 261. At least part of the second limiting structure 262 protrudes out of the outer wall of the main body 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 movement range of the pen core assembly 26 relative to the pen barrel 21. The cooperation mode of the first convex portion 262a and the first limiting structure 27 may be overlapped, clamped, plugged, glued, etc., which may be determined according to the setting position, structure, use principle, etc. of the first convex portion 262a and the first limiting structure 27. Limiting the moving range of the pen core assembly 26 relative to the pen barrel 21 means that when the pen core assembly 26 is inserted into the accommodating cavity 21a of the pen barrel 21 from the second port, and the first protrusion 262a contacts or fits in place with the first limiting structure 27, the pen core assembly 26 can no longer be inserted forward in the insertion direction (i.e., the direction from the second port to the first port), and at this time, at least part of the pen tip on the pen core assembly 26 extends out of the pen barrel 21, and the extended length is a preset length. The preset length is the length expected to be extended, and is also the length that allows the electronic pen to meet the use requirements.

[0096] Among them, in the axial direction X of the pen barrel 21, the spacing 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 located between the first limiting structure 27 and the first port 21b is clearance-matched with the pen core assembly 26. Clearance-matching means that there is a gap between the inner wall portion of the pen barrel 21 located between the first limiting structure 27 and the first port 21b and the pen core assembly 26, and the minimum value of the gap is greater than or equal to 0. It can be understood that the above-mentioned gap can enable the pen barrel to extend or contract relative to the pen core when the pen barrel and the pen core expand or contract to different lengths due to different thermal expansion and contraction coefficients. The size of the gap can be determined according to the shape, structure, etc. of the pen barrel 21 and the pen core assembly 26, as long as the pen barrel 21 does not have a hard collision with the pen core assembly 26 during the thermal expansion and contraction process, or the hard collision that occurs is not enough to cause the pen barrel 21 to crack.

[0097] In the electronic pen 20 provided in the previous embodiment, the electronic pen 20 limits the moving range of the pen core 22 in the pen barrel 21 by means of the first step structure 24 and the second step structure 25, and the first step structure 24 is arranged 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, and the contraction conditions of various regions during the contraction of the pen barrel 21 are generally the same. In this way, since the portion of the pen barrel 21 between the first step structure 24 and the second port 21c is The length of the portion between the first step structure 24 and the first port 21b is much larger than the length of the portion between the first step structure 24 and the first port 21b. Therefore, the axial contraction length and contraction force of the portion between the first step structure 24 and the second port 21c of the pen barrel 21 are also much larger than the contraction length and contraction force of the portion between the first step structure 24 and the first port 21b. The axial contraction force of the portion between the first step structure 24 and the second port 21c of the pen barrel 21 will be completely converted into the thrust force of the first step structure 24 on the second step structure 25, making the thrust force larger, thereby causing the pen barrel 21 to crack. In the present 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 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 contraction conditions of the contraction areas of the pen barrel 21 are consistent, only the axial contraction force of the half or less area of ​​the pen barrel 21 close to the second port 21c will be converted into the thrust of the first step structure 24 on the second step structure 25, so that the above-mentioned thrust is reduced by more than half, thereby reducing the risk of cracking of the pen barrel 21. In addition, the pen barrel 21 can also be designed as a structure that shrinks from both ends to the middle by adjusting the material, structure, etc., that is, the middle area of ​​the pen barrel 21 is set as its thermal expansion center area, so that 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, so that the two ends of the pen barrel 21 can shrink toward the middle part of the pen barrel 21 respectively, which will separate the first limiting structure from the second limiting structure, or the first limiting structure drives the second limiting structure to move toward the middle area of ​​the pen barrel, without causing the first limiting structure 27 to apply a thrust force to the second limiting structure 262, which can further reduce the risk of cracking of the pen barrel 21.

[0098] It can be seen that, compared with the electronic pen 20 provided in the previous embodiment, by using this electronic pen 20, the distance between the first limiting structure 27 and the first port 21b is increased, 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 clearance-matched with the pen core assembly 26, so that when the pen barrel 21 expands and contracts due to heat, it is not easy to collide with the pen core assembly 26, or the mutual force between the two when a hard collision occurs is small, thereby reducing the risk of cracking of the pen barrel 21.

[0099] In other embodiments, in the axial direction X of the pen barrel 21, the spacing 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. Compared with the spacing 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 spacing between the first limiting structure 27 and the first port 21b can be further increased, thereby 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 user experience of the electronic pen.

[0100] Since the refill assembly 26 can be arranged in a variety of ways, the second limiting structure 262 and the first limiting structure 27 can also be arranged in a variety of ways. For ease of description and understanding, examples are given below.

[0101] Embodiment 1

[0102] like Figure 8 As 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 21 b is greater than or equal to 1 / 2 of the length a2 of the pen barrel 21 .

[0103] like Figure 8 As shown, the main body 261 includes a core body 261a, and the core body 261a has the same structure as the core in the above embodiment. The second limiting structure 262 is arranged on the side wall of the core 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 it can be a plurality of split structures arranged around the core body 261a, which can be determined according to the use needs. It can be understood that no matter 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 core body 261a.

[0104] In this embodiment, the second limiting structure 262 can be formed integrally with the bracket in the refill body 261a, or can be one or more separately arranged components, connected to the bracket by plugging, welding or other methods. It can be understood that when the second limiting structure 262 is formed integrally with the above-mentioned bracket and welded, the entire second limiting structure 262 protrudes from the bracket, and at this time, the entire second limiting structure 262 forms the above-mentioned first convex portion 262a; when the second limiting structure 262 is plugged, clamped, etc. with the above-mentioned bracket, at least part of the second limiting structure 262 is located in the bracket, and 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 clamped with the first limiting structure 27, etc., which can be determined according to the use requirements. When the first convex portion 262a overlaps with the first limiting structure 27, after the pen core body 261a is plugged into place, the tail end of the pen core body 261a and the pen barrel 21 can be fixed by gluing or fixing with a fixing member to achieve the position of the pen core body 261a and the pen barrel 21. The above-mentioned fixing member can be the above-mentioned pen cap 23, or it can be other fixing members, such as a rubber cap sealed with the pen barrel 21, a clamping member clamped with the pen barrel 21, etc., which can be determined according to the use requirements.

[0106] With the electronic pen 20 provided in this embodiment, the second limiting structure 262 can be set at different positions of the refill body 261a as needed, such as the middle, a position close to 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. It can be achieved by simply modifying the bracket manufacturing mold or manufacturing method, which is easy to prepare.

[0107] In some embodiments, the second limiting structure 262 is disposed at the tail of the core body 261a, that is, the core body 261a has a first end and a second end that are disposed opposite to each other in the axial direction, the first end is provided with a pen tip 221, and the second limiting structure 262 is disposed at the second end. In this case, compared with the second limiting structure 262 being disposed at the middle of the core body 261a, when the pen barrel 21 shrinks significantly due to the influence of temperature, the second limiting structure 262 and the first limiting structure 27 will not collide with the core body 261a, and the risk of cracking of the pen barrel 21 can be further reduced.

[0108] Embodiment 2

[0109] Fig. 9 This is a cross-sectional structural diagram of an electronic pen provided in another embodiment of the present application. Fig. 9As shown, in this embodiment, the second limiting structure 262 is arranged at the tail of the core body 261a and connected to the core body 261a. The tail of the core body 261a refers to the end of the core body 261a that is arranged opposite to the pen tip 221. In other words, the core 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 pen tip 221, and the second limiting structure 262 is arranged at the second end.

[0110] Fig.10 for Fig. 9 The local enlarged structural diagram of the C in FIG. Fig.10 As shown, in this embodiment, the second limiting structure 262 is located at the side of the second end of the refill body 261a 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, plugged or connected to the bracket 222 in other ways, which can be determined according to the structure and design requirements of the bracket 222 and the limiting member 2621.

[0111] Fig.11 for Fig.10 A partial cross-sectional structural diagram of the pen holder in FIG. Fig.10 and Fig.11 As shown, in this embodiment, the first limiting structure 27 is arranged at the tail of the pen barrel 21, and the position corresponds to the position of the second limiting structure. The first limiting structure 27 can be integrally formed on the inner wall of the pen barrel 21 while preparing the pen barrel 21 by changing the mold for preparing the pen barrel 21, or it can be formed by removing part of the inner wall of the pen barrel 21 after the preparation of the pen barrel 21. At least 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 is overlapped with the first limiting structure 27 to limit the moving range of the pen core body 261a in the pen barrel 21.

[0112] By adopting the electronic pen 20 provided in this embodiment, the structure of the existing refill body 261a does not need to be changed. By adding a limiting member 2621 at the tail of the refill body 261a to form a second limiting structure 262, the movement range of the refill body 261a in the pen barrel 21 is limited. Compared with setting the second limiting structure 262 in the middle of the refill body 261a, when the pen barrel 21 shrinks significantly due to the influence of temperature, 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 specific 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 specific 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 the bracket 222 and the limiter 2621 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, a blind hole, etc. for accommodating the protrusion can be provided on the limiter 2621; or, as Fig.10 and Fig.12 As shown, the side of the bracket 222 facing away from the pen tip 221 is open, and the third protrusion 262b is provided on the side of the stopper 2621 facing the bracket 222, and the third protrusion 262b can be inserted into the open port of the bracket 222 and plugged with it to achieve the positioning function. In addition, other positioning structures can 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 include the pen cap 23 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 to the position of the pen barrel 21 by means of gluing or the like. When the electronic pen 20 includes the pen cap 23, after the pen core body 261a is inserted into place, it can be fixed to the position of 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 respectively by adhesives, which may be determined according to usage needs.

[0115] In some embodiments, a connection structure 2622 is provided on the side of the stopper 2621 away from the core body 261a. The stopper 2621 is connected to the pen cap 23 through 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 methods.

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

[0117] Regardless of the above situation, the setting of the connecting structure 2622 can ensure that the position of the refill body 261a in the pen barrel 21 can be fixed by the pen cap 23.

[0118] Fig.12 for Fig.10 The schematic diagram of the cross-sectional structure of the limiting member in FIG. Fig.12 As shown, in some embodiments, the connection structure 2622 includes a first adhesive groove 26221, and the first adhesive groove 26221 is used to support adhesive. The first adhesive groove 26221 is connected to the pen cap through adhesive. In this way, the pen cap and the pen core body can be connected by gluing, and the setting of the first adhesive groove 26221 can support the adhesive, reducing the risk of the adhesive entering the gap between the pen core body and the pen barrel.

[0119] In some embodiments, the bottom of the first adhesive containing groove 26221 is convexly provided with an isolating portion 26222, and the isolating portion 26222 separates the first adhesive containing groove 26221 into a plurality of groove bodies. The isolating portion 26222 may be a plate, a cylinder or other structure, as long as it can separate the first adhesive containing groove 26221 into a plurality of groove bodies. The setting of the isolating portion 26222 separates the first adhesive containing groove 26221 into a plurality of groove bodies, so that the assembler can place different amounts of adhesive in different groove bodies according to the assembly needs, thereby reducing the risk of adhesive waste.

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

[0121] Fig.13 for Fig.10 The cross-sectional structure diagram of the pen cap in FIG. Fig.10 and Fig.13 As shown, in some embodiments, the second convex portion 231 is provided with a second adhesive groove 232 on a side facing the bottom surface of the corresponding groove body. The second adhesive groove 232 is used to allow part of the adhesive to enter. The provision of the second adhesive groove 232 allows the adhesive in the first groove body 26223 to enter the first groove body 26223 during the buckling process of the pen cap 23, and will not block the buckling of the pen cap 23. At the same time, the bonding area between the pen cap 23 and the connecting structure 2622 can be further increased, thereby improving the connection stability between the pen core body 261a and the pen cap 23.

[0122] In some embodiments, in the groove depth direction of the first adhesive containing groove 26221, the depth of the first adhesive containing groove 26221 is less than the depth of the groove body corresponding to the second protrusion. The groove depth direction of the above-mentioned first adhesive containing groove 26221 is generally the axial direction of the pen barrel, and can also be set at an angle (such as 5°, 10°, etc.) to the axial direction of the pen barrel, which can be determined according to the needs of use. With the solution provided in this embodiment, more adhesive can be contained in the groove body corresponding to the second protrusion, so that the contact area between the outer wall bonded to the above-mentioned second protrusion 231 and the side wall of the second adhesive containing groove 232 can be larger, which helps to improve the connection stability between the limiter 2621 and the pen cap 23.

[0123] In some embodiments, the isolating portion 26222 is connected end to end to form one of the grooves. The groove is recorded as the first groove 26223. At least part of the second convex portion 231 is inserted into the first groove 26223. In this embodiment, the cross-sectional shape of the isolating portion 26222 can be annular, rectangular, square or irregular, which can be determined according to the needs of use. 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 26223. In this way, when an adhesive is provided in the first groove 26223, the bonding area between the pen cap 23 and the connecting structure 2622 can be increased, thereby improving the connection stability between the pen core body 261a and the pen cap 23.

[0124] Fig.13 for Fig.10 The cross-sectional structure diagram of the pen cap in FIG. Fig.10 and Fig.13As shown, in some embodiments, a third adhesive groove 233 is provided on one side of the pen cap 23 facing the limiting member 2621. The third adhesive groove 233 is arranged opposite to the first adhesive groove 26221. The third adhesive groove 233 is used to allow part of the adhesive to enter. The third adhesive groove 233 is arranged so that when there is more adhesive in the first adhesive groove 26221, after the pen cap 23 is buckled onto the second port of the pen barrel 21, the excess adhesive can enter the third adhesive groove 233, which will not cause adverse effects on the buckling operation of the pen cap 23, and in this way, the contact area between the pen cap 23 and the adhesive can be increased, thereby 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 containing groove 233 correspond to the first glue containing groove 26221, and the projection area on the pen cap 23 is larger than the projection area of ​​the second protrusion 231 thereon, so the above-mentioned second protrusion 231 is located in the third glue containing groove 233.

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

[0127] Embodiment 3

[0128] Fig.15 This is a cross-sectional structural diagram of an electronic pen provided in another embodiment of the present application. Fig.15 As shown, in this embodiment, the main body 261 includes a core body 261a and a cap 23, the cap 23 is connected to the core body 261a, and the second limiting structure 262 is located on the cap 23. Fig.15 In this embodiment, the pen cap 23 can be directly connected to the pen core body, or connected via a connecting member 28 and / or a connecting structure, which can be determined according to the use requirements. When the pen cap is connected via a connecting member 28 and / or a connecting structure, the connecting member 28 can be a member having the same structure as the above-mentioned limiter, except that the outer edge of the connecting member 28 may not contact the pen barrel, such as Fig.16 and Fig.17 shown. Fig.16 This is a schematic cross-sectional view of an electronic pen provided in another embodiment of the present application. Fig.17 for Fig.16 Schematic diagram of the local enlarged structure at point E in the middle.

[0129] The pen cap 23 is connected to the pen barrel 21. The end surface of the pen barrel 21 close to the second port 21c forms a first limiting structure 27. As mentioned above, the pen cap 23 can be connected to the pen barrel 21 by plugging, threading, or other methods.

[0130] By adopting the solution provided in this embodiment, compared with the embodiments one and two, there is no need to additionally set a second limiting structure on the refill body 261a, nor is there a need to additionally set a first limiting structure on the pen barrel 21, so that the relative position of the refill body 261a and the pen barrel 21 can be fixed, so that the structure of the electronic pen 20 is simple, the feasibility is high, no additional cost is required, or the additional cost required is relatively low, the production cost is low, and it is easy to install, and can be directly applied to existing electronic pens.

[0131] On the basis of the third embodiment, the first limiting structure 27 can be located on the inner wall of the pen barrel 21, with a certain distance from the second port 21c, or can be arranged on the end surface of the pen barrel 21 close to the second port 21c, or can be directly formed by the end surface of the pen barrel 21 close to the second port 21c. When the first limiting structure 27 is directly formed by the end surface of the pen barrel 21 close to the second port 21c, the structure of the pen barrel 21 is simple, and no additional structure is required. At this time, the outer diameter of the part of the pen cap 23 protruding from the pen barrel 21 can be consistent with the outer diameter of the pen barrel 21, or can 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] On the basis of the above embodiments, the first limiting structure 27 can be arranged in the same manner as the first step structure 24, that is, it includes a first step surface (i.e., a first limiting surface 271), but the position is moved from close to the first port 21b toward the second port 21c. The first limiting surface 271 is substantially parallel to the radial direction Y of the pen holder 21, such as Fig.11 As shown. Roughly parallel means that the two can be parallel or at an angle of less than 10°. At this time, the second limiting structure 262 can adopt the setting method of the above-mentioned second step structure 25, that is, it includes a second step surface (i.e., a second limiting surface), but the position is moved from close to the first port 21b toward the second port 21c. Among them, the second limiting surface is set toward the pen tip 221 of the refill assembly, and the second limiting surface is roughly parallel to the radial direction of the pen barrel, and is also roughly perpendicular to the length direction of the refill body 261a or the refill assembly. The length direction of the refill body 261a or the refill assembly is the axial direction of the pen barrel.

[0133] The first limiting structure 27 and the second limiting structure 262 are set using the solution provided in this embodiment. Compared with the solution of using the first step structure 24 and the second step structure 25 for limiting, the setting method of the limiting structure does not need to be changed, and no new structural parts need to be added to achieve the position limitation of the pen core body 261a and the pen barrel 21. In this way, the first limiting structure 27 and the second limiting structure 262 can be obtained by adjusting the shape or position of part of the mold (the above operation is also called mold repair and integration). 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 20 is low, which is convenient for adjustment of the existing production line.

[0134] The first limiting surface 271 can be an annular surface, or can include a plurality of planes arranged at intervals. 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, such as 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 sections arranged at intervals, the first limiting structure 27 includes a groove formed on the inner wall of the pen barrel 21, a plurality of grooves are provided, the plurality of grooves are arranged at intervals, the groove is connected to 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] Fig.18 for Fig. 9 The local enlarged structural diagram of D in FIG. Fig.18 As shown, on the basis of the above embodiments, in some embodiments, a constriction structure 21d is generally provided at the end of the pen barrel 21 corresponding to the first port 21b, and the inner diameter of the constriction structure 21d is generally smaller than the inner diameter of other parts of the pen barrel 21. The inner wall of the constriction structure 21d is provided with a first guide structure 21e. The first guide structure 21e is used to make sliding contact with the pen core assembly 261a during the thermal expansion and contraction of the pen barrel 21. The first guide structure 21e can also be an inclined surface, a curved surface, etc., which can be determined according to the needs of use. The provision of the first guide structure 21e can make the pen barrel 21 during the thermal expansion and contraction, even if it comes into contact with the pen core body 261a, the two can also make sliding contact, rather than hard collision, thereby reducing the force between the two and reducing the risk of cracking of the pen barrel 21.

[0136] In order to achieve the above effect, in addition to the first guide structure on the pen barrel, a second guide structure 22a can also be provided on the outer wall of the pen core assembly. The second guide structure 22a can be an inclined surface, a curved surface, etc., which can be determined according to the use requirements. The second guide structure 22a is used to slide in contact with at least part of the inner wall of the pen barrel 21 during the thermal expansion and contraction of the pen barrel 21.

[0137] Since the area where the above-mentioned shrinkage structure 21d is located is prone to friction or hard collision with the refill body 261a during the process of thermal expansion and contraction of the pen barrel 21 due to the influence of temperature, the above-mentioned second guide structure 22a can be set in the area corresponding to the position of the shrinkage structure 21d, which includes the corresponding area of ​​the shrinkage structure 21d before the pen barrel 21 is deformed, and the area where the above-mentioned shrinkage structure 21d will pass within the preset temperature range. In this way, the setting of the second guide structure 22a can make the pen barrel 21 in the process of thermal expansion and contraction, even if it contacts the refill body 261a, the two can also slide in contact instead of hard collision, thereby reducing the 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 guide structure 21e and the second guide structure 22a, the two can be spaced apart in the radial direction of the pen barrel, and can be arranged relative to each other when the two structures are the same, which is convenient for processing, and the first guide structure 21e and the second guide structure 22a can slide in contact during use.

[0139] In some embodiments, the first guide structure 21e and the second guide structure 22a are both tapered surfaces, so that the structures of the first guide structure 21e and the second guide structure 22a are simple and easy to prepare.

[0140] Fig.19 FIG. 2 is a partial cross-sectional structural diagram of an electronic pen 20 provided in another embodiment of the present application. Fig.19As shown, on the basis of 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, the two are no longer in contact 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, and 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 pen core assembly 26, and 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 arranged relative to the first step structure 24, and an activity space is formed between the two. It should be noted that the second step structure 25 and the first step structure 24 in this embodiment are no longer in contact, but are arranged at intervals to form the above activity space. This can reduce the risk of hard collision or friction between the first step structure 24 and the pen core body 261a, thereby reducing the risk of cracking of the pen barrel 21.

[0141] In some embodiments, on the axial direction X of the pen barrel 21, the length of the above-mentioned activity space is greater than or equal to the maximum position movement of the first step structure 24 within the preset temperature range. The preset temperature range can be determined according to the application environment of the electronic pen 20. For example, the electronic pen 20 is used for daily use, and the temperature range of 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 determined according to the use needs. The maximum position movement is the difference between the position of the first step structure 24 at the maximum temperature and the position at the minimum temperature within the preset temperature range. If the preset temperature range is [-40°C, 40°C], a reference point on the first step structure 24 is at position C when the temperature is -40°C, and at position D when the temperature is 40°C, then the maximum position movement is the distance between position D and position C on the axial direction X of the pen barrel 21. By adopting this solution, the first step structure 24 and the second step structure 25 are not easily contacted during thermal expansion and contraction, thereby reducing the risk of cracking of the pen barrel 21.

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

[0143] Finally, it should be noted that the above are only specific implementations 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 included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A pen holder, applied to an electronic pen, the electronic pen further comprising a refill assembly, a receiving chamber is arranged in the pen holder, the receiving chamber has a first port and a second port arranged opposite to each other, the opening area of ​​the first port is smaller than the opening area of ​​the second port, a part of the refill assembly is located in the receiving chamber, 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 the second limiting structure on the pen core assembly to limit the movement range of the pen core assembly relative to the pen barrel; Wherein, in the axial direction of the pen holder, 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 holder.

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 holder.

3. The pen holder according to claim 1 or 2, characterized in that: The first limiting structure includes a first limiting surface arranged toward 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 surface of the pen holder close to the second port forms the first limiting structure.

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

6. A refill assembly, applied to an electronic pen, the electronic pen further comprising the pen holder according to any one of claims 1 to 5, part of the refill assembly being located in the accommodating cavity, characterized in that: The refill assembly includes a main body and a second limiting structure, wherein the second limiting structure is connected to the main body, and at least a portion of the second limiting structure protrudes out of the side wall of the main body to form a first convex portion, and the first convex portion is used to cooperate with the first limiting structure to limit the movement range of the main body relative to the pen barrel.

7. The refill assembly according to claim 6, characterized in that: The first convex portion has a second limiting surface, the second limiting surface is arranged toward the pen tip of the pen core assembly, and the second limiting surface is substantially perpendicular to the length direction of the pen core 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 includes a core body, and the second limiting structure is located on the core body.

9. The refill assembly according to claim 8, characterized in that: The refill body has a first end and a second end which are arranged opposite to each other in the axial direction, the first end is provided with a pen tip, and the second limiting structure is provided at the second end.

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

11. The refill assembly according to claim 10, characterized in that: The main body also includes a pen cap, a connecting structure is provided on the side of the limiting member away from the main body, the refill body is connected to the pen cap via the connecting structure, and the pen cap is used to be sealed and connected to the pen barrel.

12. The refill assembly according to claim 11, characterized in that: The connection structure includes a first glue containing groove, the first glue containing groove is used to support the adhesive, and the first glue containing groove is connected to the pen cap through the adhesive.

13. The refill assembly according to claim 12, characterized in that: An isolation portion is protruding from the bottom of the first adhesive containing groove, and the isolation portion divides the first adhesive containing groove into a plurality of groove bodies.

14. The refill assembly according to claim 13, characterized in that: A second convex portion is provided on one side of the pen cap facing the groove body, and at least a portion of the second convex portion is inserted into one of the groove bodies.

15. The refill assembly according to claim 14, characterized in that: The second convex portion is provided with a second adhesive containing groove on a side facing the bottom surface of the groove body, and the second adhesive containing 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 groove depth direction of the first glue containing groove, the depth of the first glue containing groove is less than the depth of the groove body corresponding to the second protrusion.

17. The refill assembly according to any one of claims 12 to 16, characterized in that: A third glue containing groove is provided on one side of the pen cap facing the limiting member. The third glue containing groove is arranged opposite to the first glue containing groove, and the third glue containing groove is used for allowing part of the adhesive to enter.

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

19. The refill assembly according to claim 18, characterized in that: A positioning structure is provided between the limiting member and the refill body, and the positioning structure is used to limit the relative position of the limiting member and the refill body.

20. The refill assembly according to claim 19, characterized in that: The refill body comprises a bracket, and the bracket is openly arranged at one end facing the limiting member. The positioning structure comprises a third protrusion protruding from the limiting member toward the bracket, and the third protrusion is plug-fitted with the bracket.

21. The refill assembly according to claim 6 or 7, characterized in that: The main body comprises a core body and a pen cap, wherein the pen cap is connected to the 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 to 21, characterized in that: A second guide structure is provided on the outer wall of the refill assembly, and the second guide structure is located between the second limiting structure and the pen tip of the refill assembly. The second guide structure is used for sliding contact with at least part of the inner wall of the pen barrel during the thermal expansion and contraction of the pen barrel.

23. An electronic pen, characterized in that: It comprises the pen barrel as described in any one of claims 1 to 5 and the refill assembly as described in any one of claims 6 to 22, wherein part of the refill assembly is located in the accommodating cavity, and the movement range of the refill assembly in the pen barrel is limited by the second limiting structure and the first limiting structure, and the part of the pen barrel located between the first limiting structure and the first port is clearance-matched with the refill 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. The second step structure is arranged opposite to the first step structure, and a movable space is formed therebetween. The movable space is used for the first step structure to move relative to the second step structure when the pen barrel expands or contracts due to heat.

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 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: A necking structure is provided at the end of the pen barrel corresponding to the first port, a first guide structure is formed on the inner wall of the necking structure, a second guide structure is formed on the outer wall of the pen core assembly, the second guide structure and the first guide structure are arranged opposite to each other in the radial direction of the pen barrel, and the second guide structure is used for sliding contact with the first guide structure during thermal expansion and contraction of the pen barrel.

27. An electronic device, characterized in that: It comprises a host and the electronic pen according to any one of claims 23 to 26, wherein the electronic pen is communicatively connected with the host.

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