A pen head and electronic pen

Abstract

The present invention proposes a pen tip, which includes a pen tip, a shielding part, a transmitting part, a conductive part, a conductive plate and a first spring. A fixing groove is provided at the top center of the conductive part, a magnetic component is fixed in the fixing groove, a conductive plate is provided above the magnetic component, the magnetic field detector is provided on the conductive plate, a gap is left between the magnetic component and the conductive plate, the outer wall of the conductive part protrudes outward to form a boss, the first spring is sleeved on the outside of the conductive part, a plug-in slot is provided at the bottom center of the conductive part along the length direction of the conductive part, the end of the pen tip is inserted into the plug-in slot, the shielding part is sleeved on the outside of the conductive part, the inner wall of the shielding part protrudes inward to form a convex ring, the transmitting part is sleeved on the outside of the shielding part, and a signal line connected to an external circuit extends from the transmitting part. The present invention can achieve accurate pressure detection.

Description

Technical Field

[0001] The present application relates to the field of electronic accessories, and in particular to a pen tip and an electronic pen. Background Art

[0002] With the improvement of technology and quality of life, more and more smart devices are appearing in people's daily work and life, and touch devices are one of them. People can operate directly on the display screen through touch devices, without the need for a mouse or other devices for wired or wireless operation, which is convenient and fast. At the same time, electronic pens that can write on touch devices have also emerged. People can write freely on touch devices by using electronic pens just like using real pens.

[0003] In order to make the electronic pen more realistically simulate the writing feeling of a physical pen, a pressure sensing module is added to the electronic pen so that the handwriting output by the electronic pen changes with the force applied by the user. However, the pressure sensing module of the existing electronic pen still has the problem of low precision and poor accuracy. In addition, when the electronic pen contacts the screen, there is no real-time output of pressure, resulting in the phenomenon of pen loss. Summary of the invention

[0004] In order to solve one of the above technical problems, the present invention provides a pen head and an electronic pen.

[0005] According to a first aspect of an embodiment of the present invention, there is provided a pen tip, which comprises a pen tip portion, a shielding portion, a transmitting portion, a conductive portion, a conductive plate and a first spring, wherein a fixing groove is provided at the top center of the conductive portion, a magnetic component is fixed in the fixing groove, a conductive plate is provided above the magnetic component, the magnetic field detector is provided on the conductive plate, a signal line connected to an external circuit extends on the conductive plate, a gap is left between the magnetic component and the conductive plate, an outer side wall of the conductive portion protrudes outward to form a boss, the first spring is sleeved on the outside of the conductive portion, and one end of the first spring is connected to the conductive plate. The top surface of the boss is fixedly connected, and the other end of the first spring is fixedly connected to the bottom surface of the conductive plate. A plug-in slot is provided at the bottom center of the conductive part along the length direction of the conductive part. The end of the pen tip is inserted into the plug-in slot, and the front end of the pen tip is exposed to the outside of the conductive part. The pen tip is made of conductive material, and the shielding part is sleeved on the outside of the conductive part. The inner side wall of the shielding part protrudes inward to form a convex ring, and the inner diameter of the convex ring is smaller than the outer diameter of the boss. The transmitting part is sleeved on the outside of the shielding part, and a signal line connected to an external circuit extends from the transmitting part.

[0006] Preferably, the initial state of the first spring is a compressed state, and when the first spring is in the initial state, the bottom surface of the boss contacts the top surface of the convex ring.

[0007] Preferably, the pen tip also includes a second spring, which is sleeved on the outside of the conductive part, and one end of the second spring is fixedly connected to the bottom surface of the boss, and the other end of the second spring is fixedly connected to the top surface of the convex ring.

[0008] Preferably, the elastic coefficient of the first spring is the same as the elastic coefficient of the second spring, and the initial state of the first spring is the same as the initial state of the second spring.

[0009] Preferably, the middle section of the boss is recessed inward to form a recessed area, and a partial area of ​​the recessed area is connected to the internal plug-in slot of the conductive part. A fastening part is provided in the recessed area, and the fastening part is tightly matched with the pen tip part located in the plug-in slot of the conductive part.

[0010] Preferably, the transmitting portion is a conductive spring.

[0011] A second aspect of an embodiment of the present invention provides an electronic pen, comprising a pen body, an inner frame and the pen tip described in the first aspect of the embodiment of the present invention, wherein the inner frame is arranged inside the pen body, a circuit board is carried in the inner frame, the pen tip is arranged at the front end of the pen body, and the pen tip is fixedly connected to the inner frame.

[0012] The beneficial effects of the present invention are as follows: the present invention detects the characteristics of the magnetic field generated by the magnetic component during the up and down movement through a magnetic field detector, thereby outputting the voltage value when the magnetic component is located at different positions, and then converting the voltage value into a pressure value, thereby realizing accurate pressure detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0014] Figure 1 A schematic diagram of the structure of a pen tip according to an embodiment of the present invention;

[0015] Figure 2 Another structural schematic diagram of the pen tip described in an embodiment of the present invention.

[0016] Reference numerals:

[0017] 1. Pen tip part, 2. Shielding part, 3. Transmitting part, 4. Conductive part, 5. Conductive plate, 6. First spring, 7. Magnetic component, 8. Magnetic field detector, 9. Boss, 10. Boss ring, 11. Second spring, 12. Fastening part. DETAILED DESCRIPTION

[0018] In order to make the technical solutions and advantages in the embodiments of the present application clearer, the exemplary embodiments of the present application are further described in detail in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Furthermore, in order to provide a clearer description and make it easier to understand the present application, the parts in the drawings are not drawn according to their relative sizes, and some sizes have been exaggerated compared to other related scales; irrelevant details are not fully drawn to simplify the drawings.

[0019] Example 1

[0020] like Figure 1As shown, this embodiment proposes a pen tip, which includes a pen tip 1, a shielding part 2, a transmitting part 3, a conductive part 4, a conductive plate 5 and a first spring 6. Specifically, the pen tip proposed in this embodiment can be used in a capacitive pen. The pen tip 1, the shielding part 2, the transmitting part 3, the conductive part 4, the conductive plate 5 and the first spring 6 are all made of conductive materials. A plug-in slot is provided at the bottom center of the conductive part 4 along the length direction of the conductive part 4. The pen tip 1 can be inserted into the plug-in slot to achieve a tight fit connection between the conductive part 4 and the pen tip 1. A portion of the front end of the pen tip 1 is exposed to the outside of the conductive part 4. The outer side wall of the conductive part 4 protrudes outward to form a boss 9. A fixed groove is provided at the top center of the conductive part 4, and a magnetic component 7 is provided in the fixed groove. The magnetic component 7 can be any material with magnetism, such as a magnet. A conductive plate 5 is provided above the magnetic component 7, and a gap is left between the magnetic component 7 and the conductive plate 5. A signal line connected to an external circuit can extend from the conductive plate 5. A first spring 6 is provided between the conductive plate 5 and the concave platform of the conductive part 4, and the first spring 6 is sleeved on the conductive part 4. In this way, the pen tip 1, the conductive part 4, the first spring 6 and the conductive plate 5 form a signal transmission path. The pen tip 1 receives a signal sent by an external device, which is transmitted by the conductive part 4 and the first spring 6 and finally sent by the conductive plate 5 to the subsequent circuit for processing. A magnetic field detector 8 is provided on the conductive plate 5. The magnetic field detector 8 can detect the magnetic field changes that occur in the magnetic component 7 during the movement process. Therefore, when the front end of the pen tip 1 contacts an external object and moves upward due to force or moves downward due to the loss of force, the magnetic component 7 will also move upward or downward under the drive of the conductive part 4, thereby changing the relative position between the magnetic component 7 and the magnetic field detector 8. In this way, since the magnetic field information detected by the magnetic field detector 8 when the position of the magnetic component 7 changes is different, the voltage value output by the magnetic field detector 8 is also different. Therefore, in this embodiment, the magnetic field detector 8 outputs different voltage values ​​corresponding to the pressure value according to the magnetic field change, thereby realizing the pressure detection. For example, when the magnetic component 7 and the magnetic field detector 8 are 0.5 mm apart, the magnetic field detector 8 outputs a 1V voltage, and the corresponding pressure value is 100 N; when the magnetic component 7 and the magnetic field detector 8 are 0.1 mm apart, the magnetic field detector 8 outputs a 3V voltage, and the corresponding pressure value is 300 N. In this way, when the user uses a capacitive pen to operate on the capacitive screen, a corresponding pressure value will be generated, and then the capacitive screen will present the writing track effect corresponding to different pressure states.

[0021] A shielding part 2 is also sleeved on the outside of the conductive part 4, and the conductive part 4, the first spring 6 and most of the pen tip part 1 except the front end part are all covered inside the shielding part 2. When the pen tip part 1 is subjected to external force or loses the external force, the conductive part 4 can move up and down in the shielding part 2. A transmitting part 3 is sleeved on the outside of the shielding part 2, and the transmitting part 3 can be a conductive spring wound on the outer wall of the shielding part 2. A signal line connected to the external circuit is also extended on the transmitting part 3. The conductive plate 5 sends the signal received by the pen tip 1 to the subsequent circuit for processing, and then sends the processed signal to the external device through the transmitting part 3, thereby forming a complete signal transmission route. The shielding part 2 can completely isolate the signal received by the pen tip from the signal sent out, ensuring that the received signal and the sent signal are not interfered with each other.

[0022] In this embodiment, in addition to being able to play a role in signal transmission, the first spring 6 can also be compressed when the pen tip 1 is forced to move upward, and when the pen tip 1 loses force during the upward movement, it acts on the conductive part 4 in the reverse direction, thereby causing the pen tip 1 to return to its initial position to achieve normal use by the user. In order to make the conductive part 4 move up and down in the shielding part 2 more stable, a convex ring 10 is provided on the inner side wall of the shielding part 2 in this embodiment, and the convex ring 10 is formed by the inner side wall of the shielding part 2 protruding inward. The convex ring 10 is located below the boss 9 of the conductive part 4, and the inner diameter of the convex ring 10 is ensured to be smaller than the outer diameter of the boss 9. When the conductive part 4 moves downward, the obstruction of the convex ring 10 will limit the conductive part 4 from continuing to move downward, thereby playing a role in positioning and stabilizing the conductive part 4. In addition, when the pen tip 1 is not acted upon by external force and is in the initial position, the initial state of the first spring 6 is a compressed state, and at the same time, it is ensured that the bottom surface of the boss 9 is in contact with the top surface of the convex ring 10. In this way, the stability of the movement of the conductive part 4 in the shielding part 2 is ensured by the compression state of the first spring 6 and the structural characteristics of the mutual obstruction between the protruding ring 10 and the boss 9 .

[0023] In addition, usually, the pen tip 1 and the conductive part 4 are effectively connected by the friction between the outer wall of the pen tip 1 and the inner wall of the conductive part 4, so that the pen tip 1 will not be loose or misaligned inside the conductive part 4. However, in actual use, due to the continuous force on the pen tip 1 and the relaxation of the structural parts caused by long-term use, it is inevitable that the friction between the pen tip 1 and the conductive part 4 will be reduced. In order to prevent the pen tip 1 and the conductive part 4 from being loose or misaligned, the middle section of the boss 9 is first recessed inward to form a recessed area, such as Figure 2As shown. Part of the recessed area is connected to the plug-in slot inside the conductive part 4. Then a fastening part 12 is arranged in the recessed area, and the fastening part 12 can be tightly matched with the nib part 1 located in the plug-in slot of the conductive part 4. The fastening part 12 can be an object with a certain elasticity, such as a rubber band, a rubber band, etc., which can "bind" the nib part 1 and the conductive part 4 together. In addition to fixing the nib part and the conductive part in the above-mentioned manner, bolts, screws, etc. can also be used to nail the conductive part from the side of the nib part. Then the friction between the end point of the bolt or screw and the inner side wall of the conductive part is used to achieve fixation. Corresponding through holes can also be penetrated on the nib part and the conductive part. Then the bolt or screw is inserted into the through hole, and both ends of the bolt or screw protrude from the outer side wall of the conductive part, so that the outer side wall of the conductive part can clamp the bolt or screw to prevent the nib part from slipping out of the conductive part.

[0024] Further, in this embodiment, since the first spring 6 is in a compressed state in the initial state, the compressed state will apply a downward force to the conductive part 4. If the pressure generated when the front end of the pen tip 1 contacts the external device is less than the downward force applied to the conductive part 4 by the first spring 6, the pen tip 1 will not move upward. Then the gap between the magnetic component 7 and the magnetic field detector 8 will not change, resulting in the capacitive pen being in a state of "no pressure output" at this time. However, at this time, the pen tip 1 has already formed contact and generated pressure between the external device, which cannot guarantee that there is pressure output at the moment when the pen tip 1 contacts the external device. In order to solve this defect, the second spring 11 is further provided between the convex ring 10 and the boss 9 in this embodiment, and the second spring 11 is sleeved on the outside of the conductive part 4. The function of the second spring 11 is to offset the downward force applied to the conductive part 4 by the first spring 6 in the initial state, thereby ensuring that the pen tip 1 will move upward at the moment when the pen tip 1 contacts the external device, thereby changing the spacing between the magnetic component 7 and the magnetic field detector 8, and then outputting the correct pressure value. In order to offset the downward force applied by the first spring 6 to the conductive part 4 in the initial state, the elastic coefficient of the first spring 6 is preferably the same as the elastic coefficient of the second spring 11, and the initial state of the first spring 6 is ensured to be the same as the initial state of the second spring 11, that is, the compression amount is the same.

[0025] In addition, the present embodiment adopts a double spring structure, which not only ensures the immediacy and accuracy of the pressure output, but also plays a buffering role in the force transmission process due to the elasticity of the spring, thereby achieving a silencing effect and avoiding the pen tip 1 from generating loud noise when contacting external devices, thereby improving the user experience.

[0026] Example 2

[0027] like Figure 2As shown, this embodiment provides an electronic pen, which includes a pen body, an inner frame and a pen tip. The inner frame is arranged inside the pen body, and a circuit board is carried in the inner frame. The inner frame and the pen body can be tightly fitted to facilitate installation and removal. The pen tip is arranged at the front end of the pen body, and the end of the pen tip is fixedly connected to the front end of the inner frame. The connection method can be a snap connection, a bolt connection, etc., which is not specifically limited in this embodiment.

[0028] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A pen tip, characterized in that: The pen tip comprises a pen tip, a shielding part, a transmitting part, a conductive part, a conductive plate and a first spring, a fixing groove is provided at the top center of the conductive part, a magnetic component is fixed in the fixing groove, a conductive plate is provided above the magnetic component, a magnetic field detector is provided on the conductive plate, a signal line connected to an external circuit extends on the conductive plate, a gap is left between the magnetic component and the conductive plate, the magnetic component moves up and down in the gap under the drive of the pen tip, the magnetic field change characteristics generated by the magnetic component during the up and down movement are detected by the magnetic field detector, the voltage value when the magnetic component is located at different positions is determined, so as to obtain the pressure value of the pen tip according to the voltage value; The outer side wall of the conductive part protrudes outward to form a boss, the first spring is sleeved on the outside of the conductive part, and one end of the first spring is fixedly connected to the top surface of the boss, and the other end of the first spring is fixedly connected to the bottom surface of the conductive plate, and an insertion groove is opened at the center of the bottom of the conductive part along the length direction of the conductive part, the end of the pen tip part is inserted into the insertion groove, and the front end of the pen tip part is exposed to the outside of the conductive part, the pen tip part is made of conductive material, the shielding part is sleeved on the outside of the conductive part, and the inner side wall of the shielding part protrudes inward to form a convex ring, the inner diameter of the convex ring is smaller than the outer diameter of the boss, the transmitting part is sleeved on the outside of the shielding part, and a signal line connected to an external circuit extends from the transmitting part.

2. The writing head according to claim 1, characterized in that: The initial state of the first spring is a compressed state, and when the first spring is in the initial state, the bottom surface of the boss contacts the top surface of the convex ring.

3. The writing head according to claim 2, characterized in that: The pen tip also includes a second spring, which is sleeved on the outside of the conductive part, and one end of the second spring is fixedly connected to the bottom surface of the boss, and the other end of the second spring is fixedly connected to the top surface of the convex ring.

4. The writing tip according to claim 3, characterized in that: The elastic coefficient of the first spring is the same as the elastic coefficient of the second spring, and the initial state of the first spring is the same as the initial state of the second spring.

5. The writing head according to claim 1, characterized in that: The middle section of the boss is recessed inward to form a recessed area, and a partial area of ​​the recessed area is connected to the internal plug-in slot of the conductive part. A fastening part is provided in the recessed area, and the fastening part is tightly matched with the pen tip part located in the plug-in slot of the conductive part.

6. The writing head according to claim 1, characterized in that: The transmitting part is a conductive spring.

7. An electronic pen, characterized in that: The electronic pen comprises a pen body, an inner frame and a pen tip according to any one of claims 1 to 6, wherein the inner frame is arranged inside the pen body, a circuit board is carried in the inner frame, the pen tip is arranged at the front end of the pen body, and the pen tip is fixedly connected to the inner frame.

Images