Refill and capacitive pen
Patent Information
- Application Number
- CN202521264975.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-19
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-06-19
AI Technical Summary
[0003]相关技术中，笔芯和主板之间设置导线，笔芯和主板通过导线实现电连接，这种电连接方式容易出现故障，可靠性不高，而且会导致笔芯难以更换
[0016]本申请提供的笔芯能够通过自身芯体实现与主板的电极的电连接，相比额外设置导线连接笔芯和主板的电极而言，结构更简单、可靠性更高，而且，更换笔芯时，不需要进行导线的拆装，从而更快捷方便。笔芯可以采用双色注塑工艺一体注塑成型，结构简单、整体性好、成本低。本申请提供的电容笔的屏蔽套的一端可以插在芯套上的环形插槽中，达到良好的屏蔽效果。芯体可以采用硬度较低的材质，比如软胶材质，给用户良好的操作手感和书写体验。
Smart Images
Figure CN224668242U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic equipment technology, and in particular to a pen refill and a capacitive pen. Background Technology
[0002] A capacitive stylus is a pen used to touch a capacitive screen to complete human-computer interaction. Based on current sensing technology, it identifies the touch location by simulating the interaction between the human body's electric field and the capacitive screen. A capacitive stylus consists of a pen tip and a mainboard. The electrodes of the pen tip and the mainboard are electrically connected. When in use, the tip touches the capacitive screen, generating an electrical signal, which is then transmitted to the mainboard.
[0003] In related technologies, wires are set between the pen refill and the motherboard to achieve electrical connection between the pen refill and the motherboard. This electrical connection method is prone to failure, has low reliability, and makes it difficult to replace the pen refill.
[0004] Therefore, improving the reliability of the electrical connection between the pen refill and the motherboard, as well as facilitating the replacement of the pen refill, are technical problems that need to be solved by those skilled in the art. Utility Model Content
[0005] To solve the above-mentioned technical problems, this application provides a pen refill, which includes a core body made of a conductive material. The core body includes a core head, a core tail, and a spindle disposed between the core head and the core tail. After the pen refill is assembled with the pen shell of a capacitive pen, the core head is located outside the pen shell, and the core tail and at least part of the spindle are located inside the pen shell. The core tail is in contact with the main board electrode inside the pen shell.
[0006] One embodiment of a pen refill includes a refill sleeve, wherein the hardness of the material of the refill body is less than the hardness of the material of the refill sleeve, the refill sleeve is disposed on the outer periphery of the spindle and contacts the spindle, and the refill head and the refill tail are located outside the refill sleeve.
[0007] One embodiment of the pen refill is wherein the refill sleeve is made of an insulating material.
[0008] In one embodiment of the pen refill, the refill body is made of soft rubber, the refill sleeve is made of hard rubber, and the pen refill is a one-piece injection molded structure.
[0009] In one embodiment of the pen refill, the diameter of the end of the refill tip near the refill sleeve is larger than the inner diameter of the refill sleeve, and the end face of the refill tip near the refill sleeve and the end face of the refill sleeve near the refill tip are provided with mutually cooperating concave and convex structures; and / or,
[0010] The diameter of the end of the core tail near the core sleeve is larger than the inner diameter of the core sleeve, and the end face of the core tail near the core sleeve and the end face of the core sleeve near the core tail are provided with mutually cooperating concave and convex structures.
[0011] In one embodiment of the pen refill, the outer periphery of the refill sleeve near the tip of the refill is provided with an annular protrusion, and the end face of the annular protrusion facing the tail of the refill is provided with an annular slot.
[0012] This application also provides a capacitive pen, which includes a pen shell, a main board located inside the pen shell, and a pen refill as described in any of the above. One end of the pen shell is provided with a pen refill insertion port, and the pen refill is pluggably inserted into the pen refill insertion port. The tip of the pen refill is located outside the pen shell, and the tail and at least part of the spindle of the pen refill are located inside the pen shell. The tail of the pen refill is in contact with the electrodes of the main board.
[0013] One embodiment of a capacitive pen includes a support that serves as an electrode of the motherboard. The support has a groove, and the tip of the pen refill is located within the groove and contacts the groove wall. At least part of the pen refill sleeve is located within the groove to cooperate with the groove wall and define the radial position of the pen refill.
[0014] In one embodiment of a capacitive pen, the capacitive pen includes a shielding sleeve disposed between the pen tip and the pen shell; the outer periphery of the pen tip sleeve near the tip end is provided with an annular protrusion, and the end face of the annular protrusion facing the tip end is provided with an annular slot, and one end of the shielding sleeve extends out of the pen shell and is inserted into the annular slot.
[0015] In one embodiment of a capacitive pen, the annular protrusion is located outside the pen housing, and there is a gap between the annular protrusion and the end face of the pen housing where the pen core insertion port is located.
[0016] The pen refill provided in this application can achieve electrical connection with the electrodes of the motherboard through its own core. Compared with setting additional wires to connect the pen refill and the motherboard electrodes, the structure is simpler and more reliable. Moreover, when replacing the pen refill, there is no need to disassemble or reassemble the wires, making it quicker and more convenient. The pen refill can be integrally injection molded using a two-color injection molding process, resulting in a simple structure, good integrity, and low cost. One end of the shielding sleeve of the capacitive pen provided in this application can be inserted into the annular slot on the refill sleeve to achieve a good shielding effect. The core can be made of a material with low hardness, such as soft rubber, to provide users with a good operating feel and writing experience. Attached Figure Description
[0017] Figure 1 A schematic diagram of one embodiment of the pen refill provided in this application;
[0018] Figure 2 for Figure 1 AA section view;
[0019] Figure 3 A cross-sectional view of a portion of the structure of the capacitive pen provided in this application.
[0020] The annotations in the attached figures are explained as follows:
[0021] 10. Pen refill, 101. Pen body, 1011. Pen tip, 1012. Pen tail, 1013. Pen shaft, 102. Pen sleeve, 102a. Annular protrusion, 102b. Annular slot.
[0022] 20 pen cases;
[0023] 30 bracket, 301 side wall, 302 bottom wall;
[0024] 40 shielding sleeve;
[0025] 50 insulating sleeve;
[0026] 60 gaps;
[0027] 70 springs. Detailed Implementation
[0028] This application provides a pen refill and a capacitive pen. In order to enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0029] like Figure 1 and Figure 2 As shown, the pen refill 10 provided in this application includes a core 101. The core 101 is made of a conductive material. The core 101 includes a head 1011, a tail 1012, and a spindle 1013 disposed between the head 1011 and the tail 1012.
[0030] like Figure 3 As shown, in the assembled state of the pen tip 10 and the pen housing 20, the tip 1011 is located outside the pen housing 20 so that it can touch the capacitive screen as a pen tip. The tail 1012 and at least part of the spindle 1013 are located inside the pen housing 20. The tail 1012 is in contact with the electrodes of the main board inside the pen housing 20.
[0031] When in use, when the chip head 1011 touches the capacitive screen and generates an electrical signal, the electrical signal can be transmitted through the spindle 1013 to the chip tail 1012, and then from the chip tail 1012 to the motherboard.
[0032] The aforementioned pen refill 10 achieves electrical connection with the electrodes of the motherboard through its own core 101. Compared with setting additional wires to connect the pen refill 10 and the electrodes of the motherboard, the structure is simpler and more reliable. Moreover, when replacing the pen refill 10, there is no need to disassemble or reassemble the wires, making it quicker and more convenient.
[0033] In some embodiments, the tip 1011 has a conical structure, and the diameter of the tip 1011 gradually decreases in the direction away from the spindle 1013, so that the contact position of the tip 1011 is more precise when in use.
[0034] In some embodiments, the pen refill 10 includes a refill sleeve 102. The material hardness of the refill body 101 is less than that of the refill sleeve 102, thus providing the user with a better tactile feel and writing experience when the tip 1011 of the spindle 1013 touches the capacitive screen. The refill sleeve 102 is disposed on the outer periphery of the refill body 101 and contacts the refill body 101. Since the hardness of the refill sleeve 102 is greater than that of the spindle 1013, the contact of the refill sleeve 102 with the refill body 101 provides support for the refill body 101, preventing the refill body 101 from easily deforming due to its softer material, which could cause it to wobble when assembled on the pen shell 20 and affect the user experience. The tip 1011 and the tail 1012 are located outside the refill sleeve 102 so that the tip 1011 can smoothly contact the capacitive screen and the tail 1012 can smoothly contact the electrodes of the motherboard.
[0035] In some embodiments, the core sleeve 102 is made of an insulating material. This eliminates the need for an additional insulating layer between the pen shell 20 and the pen refill 10 when the pen refill 10 is assembled onto the pen housing 20, thus reducing the number of components in the capacitive pen and simplifying its structure.
[0036] In some embodiments, the sleeve 102 is made of hard plastic, the core 101 is made of soft plastic, and the pen refill 10 is a one-piece injection molded structure. More specifically, the pen refill 10 is integrally injection molded using a two-color injection molding process. This makes the pen refill 10 simple in structure, has good integrity, and low in cost.
[0037] In some embodiments, the diameter of the end of the core head 1011 near the core sleeve 102 (i.e., the left end of the core head 1011 in the figure) is larger than the inner diameter of the core sleeve 102 (which is also the diameter of the mandrel 1013). The end face of the core head 1011 near the core sleeve 102 (i.e., the left end face of the core head 1011 in the figure) and the end face of the core sleeve 102 near the core head 1011 (i.e., the right end face of the core sleeve 102 in the figure) are provided with mutually cooperating concave-convex structures (indicated by position C in the figure). This results in a larger contact area between the core sleeve 102 and the core head 1011, leading to a higher bonding strength between them, making them less prone to separation. Furthermore, it ensures that the core head 1011 receives reliable support from the core sleeve 102, preventing excessive deformation and damage.
[0038] In some embodiments, the diameter of the end of the core tail 1012 near the core sleeve 102 (i.e., the right end of the core tail 1012 in the figure) is larger than the inner diameter of the core sleeve 102 (which is also the diameter of the mandrel 1013). The end face of the core tail 1012 near the core sleeve 102 (i.e., the right end face of the core tail 1012 in the figure) and the end face of the core sleeve 102 near the core tail 1012 (i.e., the left end face of the core sleeve 102 in the figure) are provided with mutually cooperating concave-convex structures (indicated by position B in the figure). This results in a larger contact area between the core sleeve 102 and the core tail 1012, leading to a higher bonding strength and making them less prone to separation. Furthermore, it ensures that the core tail 1012 receives reliable support from the core sleeve 102, preventing excessive deformation and damage.
[0039] In some embodiments, the outer periphery of the core sleeve 102 near the core head 1011 (i.e., the right end of the core sleeve 102 in the figure) is provided with an annular protrusion 102a, and the end face of the annular protrusion 102a facing the core tail 1012 (i.e., the left end face of the annular protrusion 102a in the figure) is provided with an annular slot 102b. The annular slot 102b can be used to insert the shielding sleeve 40 of the capacitive pen to improve the shielding effect.
[0040] In some embodiments, the aforementioned annular protrusion 102a of the core sleeve 102 is a conical structure. The outer diameter of the annular protrusion 102a gradually increases in the direction gradually moving away from the core head 1011. The minimum outer diameter of the annular protrusion 102a is the same as the maximum outer diameter of the core head 1011, and the taper of the outer peripheral surface of the annular protrusion 102a is the same as the taper of the outer peripheral surface of the core head 1011. This makes the outer peripheral surface of the annular protrusion 102a and the outer peripheral surface of the core head 1011 fit together to form a complete conical surface. This improves the overall integrity and avoids the annular protrusion 102a from hitting the capacitive screen and causing damage to the capacitive screen when the core head 1011 is tilted and in contact with the capacitive screen.
[0041] like Figure 3 As shown, the capacitive pen provided in this application includes a pen shell 20, a main board located inside the pen shell 20, and the aforementioned pen refill 10.
[0042] One end of the pen casing 20 (i.e., the right end of the pen casing 20 in the figure) is provided with a pen refill insertion port, into which the pen refill 10 can be inserted and removed. That is, during assembly, the pen refill 10 can be inserted into the pen casing 20 through the pen refill insertion port; during disassembly, the pen refill 10 can be pulled out through the pen refill insertion port. After assembly, the tip 1011 of the pen refill 10 is located outside the pen casing 20, while the tail 1012 and at least part of the spindle 1013 are located inside the pen casing 20. The tail 1012 contacts the electrode (40 in the figure) of the main board. It is preferable that the diameter of the pen refill insertion port is slightly larger than the diameter of the pen refill, thus ensuring that the pen refill can be inserted while also providing a certain radial restraint effect on the pen refill 10.
[0043] The aforementioned capacitive pen does not require wires to connect the pen tip 10 to the electrodes of the motherboard. The pen tip 10 achieves electrical connection with the electrodes of the motherboard through its own core 101, resulting in a simpler structure and higher reliability. Moreover, when replacing the pen tip 10, one can simply unplug the pen tip 10 without disassembling or reassembling the wires, making it quicker and more convenient.
[0044] In some embodiments, the capacitive pen includes a support 201, which serves as an electrode on the main board. The support 201 has a groove. The tip 1012 of the pen refill 10 is located within the groove and contacts the groove wall. Specifically, it preferably contacts both the bottom groove wall 302 and the side groove wall 301 of the groove. The contact between the tip 1012 and the side groove wall 301 provides axial and radial limiting for the pen refill 10. The sleeve 102 of the pen refill 10 is at least partially located within the groove. The outer diameter of the portion of the sleeve 102 located within the groove can be slightly smaller than the inner diameter of the groove to avoid the sleeve 102 fitting too tightly with the side groove wall 301, which would make the pen refill 10 difficult to insert or remove. With the limiting and supporting effect of the support 201, the pen refill 10 is installed more stably and is less prone to shaking during writing.
[0045] In some embodiments, the capacitive pen includes a shielding sleeve 40, which is disposed between the pen refill 10 and the pen shell 20 to shield external signals from affecting the signal of the pen refill 10. The shielding sleeve 40 can be made of metal, or a non-metallic material with good shielding performance can also be used.
[0046] When the capacitive pen includes the aforementioned shielding sleeve 40, and the outer periphery of the core sleeve 102 near the core tip 1011 has an annular protrusion 102a, and the end face of the annular protrusion 102a facing the core tail 1012 has an annular slot 102b, one end of the shielding sleeve 40 extends out of the pen shell 20 and inserts into the annular slot 102b. In this way, the shielding effect is better.
[0047] In some embodiments, the annular protrusion 102a is located outside the pen casing 20, and there is a gap 60 between it and the end face of the pen casing 20 where the pen refill insertion port is located (i.e., the right end face of the pen casing 20 in the figure). In this way, when removing the pen refill 10, a tool or fingernail can be inserted into the gap 60 to apply an external pulling force to the pen refill 10, thereby facilitating the removal of the pen refill 10.
[0048] In some embodiments, the capacitive pen includes an insulating sleeve 50, which is disposed between the electrodes (30 in the figure) of the motherboard and the shielding sleeve 40 to prevent the electrodes of the motherboard from directly contacting the shielding sleeve 40 and causing a short circuit.
[0049] In some embodiments, the capacitive pen includes a spring 70 disposed between the bracket 201 and the insulating sleeve 50, allowing the bracket 201 a certain amount of flexibility. When removing the pen refill 10, a tool or fingernail is inserted into the gap 60 between the annular protrusion 102a and the pen shell 20 to apply an outward pulling force. At this time, because the gap 60 is relatively small, the depth to which the tool or fingernail can be inserted is limited, so the applied outward pulling force is insufficient to pull the pen refill 10 out of the groove of the bracket 201. However, it can move the bracket 201 outward a certain distance. When the bracket 201 moves outward a certain distance, it will move the pen refill 10 outward along with it, thereby widening the gap 60. After the gap 60 widens, the tool or fingernail can be inserted deeper into the gap 60, thus applying a greater outward pulling force to pull the pen refill 10 out of the groove of the bracket 201. After the pen refill 10 is pulled out, the bracket 201 returns to its original position under the elastic force of the spring 70. In other words, the spring 70 makes it easier to remove the pen refill 10.
[0050] The above-mentioned optional embodiments can be freely combined without conflict.
[0051] The above examples illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A pen refill, characterized in that, The pen refill (10) includes a core (101) made of conductive material. The core (101) includes a head (1011), a tail (1012), and a spindle (1013) disposed between the head (1011) and the tail (1012). When the pen refill (10) is assembled with the pen shell (20) of the capacitive pen, the head (1011) is located outside the pen shell (20), the tail (1012) and at least part of the spindle (1013) are located inside the pen shell (20), and the tail (1012) is in contact with the electrodes of the main board inside the pen shell (20).
2. The pen refill according to claim 1, characterized in that, The pen refill (10) includes a refill sleeve (102). The material hardness of the refill body (101) is less than that of the material hardness of the refill sleeve (102). The refill sleeve (102) is disposed on the outer periphery of the spindle (1013) and contacts the spindle (1013). The refill head (1011) and the refill tail (1012) are located outside the refill sleeve (102).
3. The pen refill according to claim 2, characterized in that, The core sleeve (102) is made of insulating material.
4. The pen refill according to claim 2, characterized in that, The core (101) is made of soft rubber, the core sleeve (102) is made of hard rubber, and the pen refill (10) is an integral injection molded structure.
5. The pen refill according to claim 2, characterized in that, The diameter of the end of the core head (1011) near the core sleeve (102) is larger than the inner diameter of the core sleeve (102). The end face of the core head (1011) near the core sleeve (102) and the end face of the core sleeve (102) near the core head (1011) are provided with mutually cooperating concave-convex structures; and / or, The diameter of the end of the core tail (1012) near the core sleeve (102) is larger than the inner diameter of the core sleeve (102). The end face of the core tail (1012) near the core sleeve (102) and the end face of the core sleeve (102) near the core tail (1012) are provided with mutually cooperating concave and convex structures.
6. The pen refill according to any one of claims 2-5, characterized in that, The core sleeve (102) has an annular protrusion (102a) on the outer periphery of one end near the core head (1011), and an annular slot (102b) is provided on the end face of the annular protrusion (102a) facing the core tail (1012).
7. A capacitive pen, characterized in that, The capacitive pen includes a pen shell (20), a main board located inside the pen shell (20), and a pen refill (10) as described in any one of claims 1-6. One end of the pen shell (20) is provided with a pen refill insertion port, and the pen refill (10) is pluggably inserted into the pen refill insertion port. The tip (1011) of the pen refill (10) is located outside the pen shell (20), and the tail (1012) and at least part of the spindle (1013) of the pen refill (10) are located inside the pen shell (20). The tail (1012) is in contact with the electrodes of the main board.
8. The capacitive pen according to claim 7, characterized in that, The capacitive pen includes a bracket (201), which serves as an electrode of the main board. The bracket (201) has a groove, and the tip (1012) of the pen core (10) is located in the groove and contacts the groove wall. The core sleeve (102) of the pen core (10) is at least partially located in the groove.
9. The capacitive pen according to any one of claims 7-8, characterized in that, The capacitive pen includes a shielding sleeve (40), which is disposed between the pen core (10) and the pen shell (20). The core sleeve (102) has an annular protrusion (102a) on its outer periphery near the core tip (1011). The annular protrusion (102a) has an annular slot (102b) on its end face facing the core tail (1012). One end of the shielding sleeve (40) extends out of the pen shell (20) and is inserted into the annular slot (102b).
10. The capacitive pen according to claim 9, characterized in that, The annular protrusion (102a) is located outside the pen shell (20), and there is a gap (60) between the annular protrusion (102a) and the end face of the pen shell (20) where the pen core insertion port is located.