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JP-7856348-B2 - Stylus pen including a sealing member

JP7856348B2JP 7856348 B2JP7856348 B2JP 7856348B2JP-7856348-B2

Inventors

  • キム，キウン
  • ピョン，ムンスブ
  • ペク，チョンクク
  • チュン，キルヨン

Assignees

  • 株式会社 ハイディープ

Dates

Publication Date
20260511
Application Date
20250521
Priority Date
20240621

Claims (14)

  1. In stylus pens, Housing and A core body having one end positioned outside the housing and the other end positioned inside the housing, configured to move along its longitudinal direction by an external force acting on the one end, An inductor portion including a ferrite core having a through hole through which the core body passes, and a coil wound on the outer surface of the ferrite core, disposed inside the housing, A capacitor section is electrically connected to the inductor section to form a resonant circuit, The stylus pen includes a third sealing member configured to block a first moisture inflow path through which moisture flows into the interior of the stylus pen via the space between the housing and the inductor portion, passing through the core opening of the housing. The third sealing member is, The ferrite core is positioned to cover the outer surface of the ferrite core near the opening of the core body and to be in close contact with the housing. The ferrite core is configured not to cover the end portion near the core opening. Stylus pen.
  2. The third sealing member is configured as a non-cap type through-type. The stylus pen according to claim 1.
  3. A fixing bracket is fixedly positioned inside the housing and coupled to one end of the ferrite core, A first sealing member configured to block the first moisture inflow path and It further includes, The first sealing member is 1) The ferrite core is positioned to cover the ferrite core within the separation space formed between the coil and the fixing bracket, and is positioned in close contact with the inner wall of the housing, 2) Arranged to cover the outer surface of the fixing bracket and in close contact with the inner wall of the housing, The stylus pen according to claim 1.
  4. A second sealing member is configured to block a second moisture inflow path through which moisture flows into the interior of the stylus pen via the through-hole of the ferrite core, passing through the core opening of the housing. It further includes , The fixing bracket includes a partition wall that contacts the ferrite core and has a through hole formed for the core to pass through , The second sealing member is positioned in the partition wall so as to fill the outer casing of the through-hole, and the core is positioned in close contact with the core at the portion of the partition wall that penetrates the through-hole. The stylus pen according to claim 3.
  5. The second sealing member includes a cylindrical contact portion having a height in the longitudinal direction of the core body, and is arranged to be in close contact with the core body at the contact portion. The stylus pen according to claim 4 .
  6. A buffer member is positioned between the inner surface of the housing and the other end of the ferrite core, and is positioned to cover at least a portion of the other end of the ferrite core. Further including, The stylus pen according to claim 1 .
  7. The cushioning member is positioned so as to be in close contact with the housing and the other end of the ferrite core. The stylus pen according to claim 6 .
  8. The other end of the ferrite core has a tapered shape in which the diameter or width decreases towards the end portion, and includes at least one curved surface portion whose outer surface is curved inward. The stylus pen according to claim 7 .
  9. The cushioning member has an even smaller thickness compared to the case where the other end of the ferrite core does not include the curved portion. The stylus pen according to claim 8 .
  10. The buffer member includes a fourth sealing member located at one end near the opening of the core body, The fourth sealing member is positioned such that its outer periphery is in close contact with the inner wall of the housing. The stylus pen according to claim 6 .
  11. The fourth sealing member is taped or coated on one surface of the cushioning member. The stylus pen according to claim 10 .
  12. The fourth sealing member is positioned such that its inner casing is in close contact with the ferrite core. The stylus pen according to claim 10 .
  13. A button portion is positioned on the outer surface of the housing, A button bracket fixed and positioned inside the housing and coupled to the button portion, The packing member is coupled to the button bracket and positioned to be in close contact with the button bracket, The stylus pen according to claim 1 .
  14. A circuit board bracket fixed and positioned inside the housing, covering the capacitor section, A clicker button configured to move along its longitudinal direction by an external force acting on one end, A clicker housing, one end of which is connected to the housing and which is positioned inside the housing to surround the clicker button, A clicker cover connects the substrate bracket and the clicker housing inside the housing, The present invention further includes a fifth sealing member positioned to surround a predetermined groove formed in the clicker cover near the portion where the clicker cover and the substrate bracket are connected, The fifth sealing member is positioned to be in close contact with the housing. The stylus pen according to claim 1 .

Description

This invention relates to a stylus pen, and more particularly to a sealing member capable of blocking one or more moisture inflow paths inside the stylus pen, and a stylus pen including the same. A stylus pen is a pen-shaped device that allows users to input data by lightly touching the screen while dragging or clicking. Users utilize stylus pens for precise touch input. Stylus pens can be classified into active and passive types depending on whether or not they contain a battery and electronic components internally. Active stylus pens offer superior basic performance compared to passive stylus pens and have the advantage of providing additional functions (pressure sensitivity, hovering, buttons). However, they are expensive, require a power source, and use a rechargeable battery, which means they are not widely used by anyone other than a select group of high-end users. Passive stylus pens have the advantages of being cheaper and not requiring batteries compared to active stylus pens, but they have the disadvantage of being less capable of precise touch recognition. However, recently, technologies such as inductive resonant EMR (Electro Magnetic Resonance) and capacitive resonant methods have been proposed to realize passive stylus pens capable of precise touch recognition. While the EMR method excels in the quality of writing and drawing—the core function of a stylus pen—it has the disadvantage of being thicker and more expensive because it requires a separate EMR sensor panel and EMR driver IC in addition to the capacitance touch panel. The capacitive resonant method uses a common capacitance touch sensor and touch controller IC, and without additional cost, it enhances the IC's performance to support pen-based touch input. In EMR or capacitive resonant methods, for a touch sensor to more accurately identify a touch from a stylus pen, the amplitude of the resonant signal must be large. This ensures that the frequency of the drive signal transmitted to the stylus pen is approximately the same as the resonant frequency of the resonant circuit built into the stylus pen. However, conventional EMR or capacitive resonant methods suffer from a significant problem: even when the resonant frequency and the drive signal frequency match, signal transmission attenuation is very large, making signal transmission difficult. As a result, despite years of attempts by numerous touch controller IC vendors, sufficient output signals have not been achieved, and no company has yet succeeded in mass production. Therefore, in order to manufacture an EMR (Electromagnetic Resonance) or capacitive resonant stylus pen capable of producing the maximum output signal, the design of the internal resonant circuit and the pen's structure are crucial factors. Figures 1(a) through 1(c) are diagrams illustrating one of the requirements of a conventional stylus pen. The external design of conventional stylus pens, including the stylus pens 10a and 10b shown in Figures 1(a) and 1(c), must meet the specified requirements, taking into consideration the user's environment. One of the aforementioned requirements is that the conventional stylus pens 10a and 10b must be capable of drawing when tilted at a predetermined angle (e.g., 60°) with respect to a predetermined contact surface 31. In particular, with some conventional stylus pens 10a and 10b, if a certain force F is applied after contact with the surface of the display panel 300, the pen tip is pressed, and a portion of it enters the housing 19. Even when the pen tip is pressed and tilted at a predetermined angle (e.g., 60°), some stylus pens 10a and 10b should not cause any problems with drawing. In other words, when the conventional stylus pens 10a and 10b are tilted relative to the contact surface 31, the external mechanisms of the stylus pens 10a and 10b (e.g., the housing 19) must not prevent them from tilting to a predetermined angle (e.g., 60°). Figure 2 is a simplified diagram showing the internal structure of a conventional stylus pen. The conventional stylus pens 10c and 10d shown in Figure 2 consist of a pen tip 11, inductor sections 13 and 13', a capacitor section 15, and a housing 19. Other additional components may also exist. The inductor sections 13 and 13' consist of ferrite cores 131 and 131' and a coil 133. The pen tip 11 has a structure in which a portion is inserted into the through-holes of the ferrite cores 131 and 131'. The inductor sections 13, 13' and the capacitor section 15 are electrically connected to each other to form an LC resonant section. This LC resonant section can resonate in response to a drive signal provided from the transmitter located outside the stylus pens 10c, 10d, and is configured to emit a predetermined signal (hereinafter referred to as the pen signal) through resonance. The shape of the ferrite core 131' of the inductor section 13' of the stylus pen 10d shown on the right side of Figure 2 differs from the ferrite core 131 of the inductor se