Nib assembly, stylus, and electronic device

Abstract

The application provides a pen tip assembly, a stylus and an electronic device. The pen tip assembly is applied to the stylus. The pen tip assembly comprises a first cone, a first circular truncated cone and a second circular truncated cone which are coaxial and have hollow structures respectively, and a conductive part. The lower bottom surface of the first circular truncated cone is connected with the upper bottom surface of the second circular truncated cone. The upper bottom surface of the second circular truncated cone comprises a first supporting surface. The first supporting surface is a surface of the lower bottom surface of the first circular truncated cone which is not connected with the upper bottom surface of the second circular truncated cone. The inner conical surface of the first cone is connected with the outer circular truncated cone surface of the first circular truncated cone. The bottom surface of the first cone is connected with the first supporting surface. The conductive part is located between the inside of the first cone and the upper bottom surface of the first circular truncated cone. The first cone is made of a first material. The first circular truncated cone and the second circular truncated cone are made of a second material. The light transmittance of the first material is less than the light transmittance of the second material. The pen tip assembly has a high degree of integration.

Claims

1. A pen tip assembly, characterized in that, The pen tip assembly (10) is applied to the stylus (1). The pen tip assembly (10) includes: a first cone (104), a first frustum (105) and a second frustum (106) that are coaxial and have hollow structures respectively, and a conductive part (107). The lower bottom surface of the first frustum (105) is connected to the upper bottom surface of the second frustum (106), and the radius of the lower bottom surface of the first frustum (105) is smaller than the radius of the upper bottom surface of the second frustum (106). The upper bottom surface of the second frustum (106) includes a first support surface, which is the surface of the lower bottom surface of the first frustum (105) that is not connected to the upper bottom surface of the second frustum (106). The inner conical surface of the first cone (104) is connected to the outer conical surface of the first frustum (105), and the bottom surface of the first cone (104) is connected to the first support surface. The conductive part (107) is located between the interior of the first cone (104) and the upper bottom surface of the first frustum (105); The light transmittance of the first cone (104) is less than that of the first frustum (105) or the second frustum (106).

2. The pen tip assembly according to claim 1, characterized in that, The first cone (104) is made of a first material, and the first frustum (105) and the second frustum (106) are made of a second material. The first material includes a first matrix material, and the second material includes a second matrix material. The light transmittance of the first matrix material is less than that of the second matrix material.

3. The pen tip assembly according to claim 2, characterized in that, The first material further includes a dopant material, which is dispersed in the first matrix material; The second material further includes the doped material, which is dispersed in the second matrix material; The difference between the transmittance of the first material and the transmittance of the second material is less than the difference between the transmittance of the first matrix material and the transmittance of the second matrix material.

4. The pen tip assembly according to claim 3, characterized in that, The first matrix material includes thermoplastic polyurethane elastomer (TPU) or polyamide thermoplastic elastomer (TPAE), and the second matrix material includes any one of polyamide (PA), polycarbonate (PC), or polymaleic anhydride (PMA).

5. The pen tip assembly according to any one of claims 1-4, characterized in that, The wall thickness of the first cone (104) is less than the wall thickness of the first frustum (105).

6. The pen tip assembly according to any one of claims 1-4, characterized in that, The height of the first cone (104) is less than the height of the second frustum (106).

7. The pen tip assembly according to claim 6, characterized in that, The height of the first cone (104) is h1, and the height of the second frustum (106) is h2, wherein the ratio of h1 to h1+h2 is greater than or equal to 0.3 and less than or equal to 0.

6.

8. The pen tip assembly according to any one of claims 1-4, characterized in that, The projection of the bottom surface of the first cone (104) along the axial direction of the pen tip assembly coincides with the upper bottom surface of the second frustum (106).

9. The pen tip assembly according to any one of claims 1-4, characterized in that, The hardness of the first cone (104) is less than that of the first frustum (105) and the second frustum (106).

10. The pen tip assembly according to any one of claims 1-4, characterized in that, The outer conical surface of the first cone (104) and the outer frustum surface of the second frustum (106) are both smooth surfaces.

11. The pen tip assembly according to any one of claims 1-4, characterized in that, The upper bottom surface of the first frustum (105) includes a through hole (1051a), and the conductive part (107) includes a fixing part (107b) located in the through hole (1051a) and a first extension part (107a) extending along the axial direction of the first frustum (105) close to the side of the first cone (104).

12. The pen tip assembly according to any one of claims 1-4, characterized in that, The lower surface of the second truncated cone (106) also includes an annular connecting portion (1063) extending along the axial direction of the pen tip assembly away from the upper surface of the second truncated cone (106), and the annular connecting portion (1063) is provided with threads on the inner ring or the outer ring.

13. A stylus, characterized in that, The stylus (1) includes a pen tip assembly (10) as described in any one of claims 1-12, and further includes: The pen holder (20) and the pen refill (30) are located in the pen holder (20). One end of the pen holder (20) is connected to the second frustum (106) of the pen tip assembly (10). The pen refill (30) is electrically connected to the conductive part (107) of the pen tip assembly (10). The pen refill (30) is used to generate electrical signals.

14. An electronic device, characterized in that, The electronic device includes a pen tip assembly as claimed in any one of claims 1-12, or includes a stylus as claimed in claim 13.

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