Tail assembly structure of smart pen with tail independent key

Abstract

This utility model discloses a tail assembly structure for a smart pen with an independent tail button, including a pen tube, a pen tube cap, and a rear button plate. Inside the pen tube cap, along the pen tube axis, are sequentially housed a tail button, a tail button spring, an FPC antenna mount, and an FPC antenna. The tail button includes a pressing end and a push rod, which passes through the center of the tail button spring, allowing the pressing force to directly trigger a third microswitch at the tail end of the front of the rear button plate. The tail button spring only provides the return force. The FPC antenna is glued and fixed to the surface of the FPC antenna mount, independent of the battery arrangement inside the pen tube. This utility model, through a force transmission structure with the push rod passing through the center of the spring and coaxial alignment, achieves an independent power button function and avoids accidental triggering without increasing the pen tube length. The FPC antenna is independent of the battery arrangement, and its design is not limited by battery specifications, allowing for independent optimization of antenna performance and improvement of Bluetooth signal strength.

Description

Technical Field

[0001] This utility model relates to the field of human-computer interaction input device technology, specifically to a smart pen tail assembly structure with an independent tail button. Background Technology

[0002] Smart pen products such as Bluetooth page turners, AI voice recorders, and smart styluses typically need to integrate a power button and a wireless communication antenna. In traditional designs, the power button is usually located on the side of the pen body along with the function buttons, while the Bluetooth antenna is printed on the main control PCB board or attached to the inner wall of the pen body.

[0003] In existing smart pen products, some have placed the wireless communication antenna at the end of the pen to improve antenna radiation performance. For example, the publicly disclosed "Wireless Control Device and Electronic Equipment" CN222966327U places the antenna radiator at the end of the pen and arranges it around the outer surface of the battery to take advantage of the better clearance at the end of the pen. However, in this solution, the antenna radiator is attached to the outer surface of the battery, requiring a special design of the battery shape to accommodate the antenna. Furthermore, the antenna size is limited by the battery size, hindering the independent design and optimization of the antenna radiator. Additionally, this solution does not address the issue of integrating both an independent power button and a wireless antenna at the end of the pen.

[0004] On the other hand, some smart stylus products, such as the publicly disclosed CN223245089U, have multiple interactive buttons such as voice buttons and artificial intelligence buttons on the side of the pen body. However, their power on / off functions are still concentrated on the side buttons or rely on specific combinations of function keys, which can easily lead to users accidentally triggering the power on / off operation. This solution also does not have a separate power on / off button at the end of the pen.

[0005] The above-mentioned traditional design has the following technical problems:

[0006] First, placing the power button and function buttons on the same side of the pen body makes it easy for users to accidentally trigger the power on / off operation during use, affecting the user experience.

[0007] Secondly, when the Bluetooth antenna is placed on the main control PCB board, the main control PCB board usually integrates high-density components such as the main control chip, power management circuit, and push-button switches. These components will cause significant interference to the antenna's radiation performance, affecting the Bluetooth signal strength and communication stability. While the solution of using the antenna to surround the outer surface of the battery can improve the clearance environment, the antenna size and shape are limited by the battery specifications, which is not conducive to independent optimization of antenna performance for the Bluetooth communication frequency band.

[0008] Third, if the power button is located at the tail of the pen, a separate button housing and button transmission structure usually need to be set at the tail of the pen, which will increase the length of the pen and affect the compactness and portability of the product.

[0009] Fourth, the internal space of a smart pen is extremely limited. If multiple components such as the power button, button reset spring, Bluetooth antenna, and antenna mount are arranged independently, they will require a large amount of internal space.

[0010] Therefore, a new intelligent pen tail structure is needed that can integrate an independent power button, a button reset mechanism, and a Bluetooth antenna within the limited space at the tail of the pen body, and solve the problems of button mis-triggering, antenna interference, and space utilization. Utility Model Content

[0011] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide a smart pen tail assembly structure with an independent tail button. By arranging the tail button, button spring, FPC antenna mount, and FPC antenna coaxially along the axis inside the pen tube tail cap, an independent power on / off button function is achieved without increasing the pen tube length. Furthermore, Bluetooth signal performance is improved by moving the antenna away from the main control chip.

[0012] Compared with the existing "antenna surrounding the outer surface of the battery" solution, the FPC antenna of this utility model is glued and fixed on the surface of an independent FPC antenna holder. The size and shape of the FPC antenna are not limited by the battery structure and can be designed independently according to the antenna radiation performance requirements. At the same time, the FPC antenna holder also serves as the abutting frame for the tail button spring, realizing the structural reuse of the antenna carrier and the button mechanism, and improving the utilization rate of the internal space of the pen tube tail cap.

[0013] To achieve the above objectives, the present invention adopts the following technical solution:

[0014] A tail assembly structure for a smart pen with an independent tail button includes a pen tube, a tail cap mounted at the rear end of the pen tube, and a rear button plate housed inside the pen tube. The end face of the tail cap has a button opening, and the tail cap, along the axial direction of the pen tube, sequentially houses a tail button, a tail button spring, an FPC antenna mount, and an FPC antenna.

[0015] The tail button includes a pressing end and a push rod connected to the pressing end; the pressing end protrudes outward through the button opening on the end face of the pen tube cap; the tail button spring is sleeved around the push rod, one end of the tail button spring abuts against the inner side of the pressing end, and the other end abuts against the FPC antenna mount.

[0016] The FPC antenna mount is a cylindrical structure that encloses a portion of the tail button spring and the tail end of the rear button plate; the FPC antenna is attached and fixed to the surface of the FPC antenna mount.

[0017] A third micro switch is provided at the front end of the rear button panel, and the pressing direction of the third micro switch is towards the end face of the pen tube cap.

[0018] The push rod of the tail button, the tail button spring, the FPC antenna mount, and the third micro switch are coaxially aligned in the axial direction of the pen tube. The end of the push rod passes through the center of the tail button spring, so that the pressing force of the tail button can directly trigger the third micro switch through the end of the push rod. The tail button spring is used to provide a rebound force after the press is released.

[0019] Furthermore, the FPC antenna is electrically connected to the antenna solder joint on the rear keypad via a lead wire passing through the inner hole of the FPC antenna mount.

[0020] Furthermore, the FPC antenna is attached and fixed to the surface of the FPC antenna holder. The FPC antenna is physically independent of the battery disposed inside the pen tube. The FPC antenna and the battery are arranged at intervals in the axial direction of the pen tube and are not attached to the outer surface of the battery.

[0021] Furthermore, the pen tube cap is joined to the pen tube via a snap-fit ​​structure or an interference fit, and the outer diameter of the pen tube cap is the same as that of the pen tube.

[0022] Furthermore, the pressing end of the tail button is a dome-shaped arc surface, and the end face area of ​​the pressing end accounts for 1 / 3 to 1 / 2 of the end face area of ​​the pen tube cap.

[0023] Furthermore, the FPC antenna mount is made of plastic, and the outer surface of the FPC antenna mount is provided with a planar area for attaching and fixing the FPC antenna; the axial length of the FPC antenna mount is 2 to 3 times the free length of the tail button spring.

[0024] Furthermore, the rear button board is a long strip PCB board, and the third micro switch is located at the far end of the rear button board in the length direction; the body of the third micro switch is located within the extended projection range of the FPC antenna mount in the axial direction of the pen tube, so that the push rod end of the tail button extends axially through the inner hole of the FPC antenna mount to the pressing surface of the third micro switch.

[0025] Furthermore, an antenna solder joint is provided at the tail end of the rear button board; a main control chip is also provided on the rear button board; the FPC antenna is soldered to the antenna solder joint via a lead wire and connected to the RF pin of the main control chip via PCB traces on the rear button board.

[0026] Furthermore, the tail button spring is a helical compression spring. In its natural state, the tail button spring causes the pressing end of the tail button to protrude from the end face of the pen tube cap. In the pressed state, the tail button moves into the pen tube, the tail button spring is compressed, and the end of the push rod triggers the third micro switch.

[0027] Furthermore, the tail button, the tail button spring, the FPC antenna mount, and the FPC antenna are pre-assembled into a single pen tail assembly, which is installed entirely inside the pen tube cap.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] First, the power button is independently located at the end of the pen tube, with the pressing end exposed through the button opening on the end cap of the pen tube. This completely separates the power button from the function button on the side of the pen body, effectively preventing users from accidentally triggering the power on / off operation during use.

[0030] Secondly, the force transmission structure of "push rod passing through the center of spring" is adopted, so that the pressing force of the tail button directly triggers the micro switch through the end of the push rod, avoiding the offset and loss that may occur when the pressing force is transmitted through multiple series components; at the same time, the tail button spring does not participate in the force transmission, but only provides the rebound function, ensuring reliable triggering and reset of the button.

[0031] Third, by aligning the push rod, button spring, FPC antenna mount, and third micro switch coaxially in the axial direction of the pen tube, all components share the space in the same axial direction, achieving a compact layout inside the pen tube cap and integrating independent power on / off button functions without increasing the overall length of the pen tube.

[0032] Fourth, the cylindrical structure of the FPC antenna mount serves as both the carrier of the antenna and the structural skeleton of the button spring and the rear button plate, realizing the multi-functional reuse of components and further saving space inside the pen tube cap.

[0033] Fifth, the FPC antenna is located at the tail of the pen tube, away from the soft-pack lithium battery in the middle of the pen body and the main control chip on the back of the button panel. This minimizes the impact of the metal battery casing and high-density circuitry on the antenna radiation performance, effectively improving Bluetooth signal strength and communication stability.

[0034] Sixth, the tail button spring not only provides the button reset force, but also serves as an elastic element between the tail button and the FPC antenna mount, giving the button pressing force transmission path a certain degree of elastic buffer. This ensures reliable triggering of the micro switch while avoiding damage to the micro switch due to the direct rigid transmission of force by the tail button.

[0035] Seventh, the FPC antenna of this utility model is glued and fixed on the surface of an independent FPC antenna mount. Compared with the solution of using the outer surface of the battery as the antenna carrier, the design of the FPC antenna has higher independence. The antenna size and shape are not limited by the battery specifications, which is conducive to independent optimization of antenna performance for Bluetooth communication frequency bands. At the same time, this solution does not require the battery to adopt a special shape or surface process, which reduces the restrictions on battery selection and helps to reduce product costs.

[0036] Eighth, the tail button, tail button spring, FPC antenna mount, and FPC antenna can be pre-assembled into an integrated pen tail assembly before leaving the factory, simplifying the overall assembly process of the smart pen and improving mass production efficiency. Attached Figure Description

[0037] Figure 1 This is a three-dimensional schematic diagram of the overall appearance of the smart pen according to an embodiment of the present utility model;

[0038] Figure 2 This is an exploded view of the intelligent pen components according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic axial cross-sectional view of the smart pen according to an embodiment of the present invention;

[0040] Figure 4 This is an enlarged schematic diagram of the internal assembly of the pen tube cap according to an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1 - Pen tube; 2 - Middle support; 3 - Pen cap assembly; 31 - Pen cap tip; 32 - Pen cap metal base; 33 - Front support locking ring; 4 - Pen tube tail cap; 5 - Pen tip plate; 6 - Soft-pack lithium battery; 7 - Rear button plate; 8 - FPC flexible cable; 9 - FPC antenna; 10 - FPC antenna base; 11 - Button opening; 12 - Indicator light opening; 13 - Charging interface opening; 14 - Metal spring pin assembly; 15 - Type-C charging interface; 16 - First micro switch; 17 - Second micro switch; 18 - Third micro switch; 19 - Main control chip; 20 - Button spring cap; 21 - Tail button; 22 - Tail button spring; 23 - Front cover of the support; 24 - MEMS microphone; 25 - Microphone pickup hole. Detailed Implementation

[0043] See Figures 1 to 4This utility model embodiment provides a smart pen tail assembly structure with an independent button at the tail. For example... Figure 2 As shown, the smart pen includes a pen tube 1, a middle support 2, a pen cap assembly 3, a pen tube tail cap 4, and components such as a pen tip plate 5, a soft-pack lithium battery 6, and a rear button plate 7 housed inside the pen tube 1. This utility model focuses on protecting the tail assembly structure located inside the pen tube tail cap 4, namely the pen tube tail cap 4, the tail button 21, the tail button spring 22, the FPC antenna mount 10, the FPC antenna 9, and the third micro switch 18 at the tail end of the rear button plate 7, and their mutual assembly relationships.

[0044] The pen tube 1 is the main outer shell of the smart pen, and it is long and thin. The pen tube cap 4 is installed at the rear end of the pen tube 1 and is connected to the pen tube 1 by a snap-fit ​​structure. The outer diameter of the pen tube cap 4 is the same as the outer diameter of the pen tube 1, so that the overall appearance of the smart pen is continuous.

[0045] The rear button panel 7 is a long strip PCB board housed in the rear section of the pen tube 1. The front of the rear button panel 7 faces the side wall of the pen tube 1. The front of the rear button panel 7 features a Type-C charging port 15, a first micro switch 16, a second micro switch 17, a third micro switch 18, and a MEMS microphone 24. The third micro switch 18 is located at the rear end of the front of the rear button panel 7, and its pressing direction is along the axial direction of the pen tube 1 towards the end face of the pen tube cap 4. The back of the rear button panel 7 houses the main control chip 19, which integrates Bluetooth communication functionality.

[0046] The end face of the pen tube cap 4 is provided with a button opening, and the pen tube cap 4 contains a tail button 21, a tail button spring 22 and an FPC antenna mount 10; the components are arranged sequentially along the axial direction of the pen tube 1 and are coaxially aligned with the third micro switch 18.

[0047] The tail button 21 is located on the end face of the pen tube cap 4, and includes a pressing end and a push rod integrally connected to the pressing end. The pressing end is a dome-shaped arc surface, and the end face area of ​​the pressing end occupies 1 / 3 to 1 / 2 of the end face area of ​​the pen tube cap 4. The pressing end protrudes outward through the button opening on the end face of the pen tube cap 4. The push rod is a slender rod-shaped structure that extends inward from the inside of the pressing end along the axial direction of the pen tube 1.

[0048] The tail button spring 22 is a helical compression spring, sleeved around the push rod of the tail button 21. One end of the tail button spring 22 abuts against the inner side of the pressing end of the tail button 21, and the other end abuts against the FPC antenna mount 10. In its natural state, the elastic force of the tail button spring 22 causes the pressing end of the tail button 21 to protrude from the end face of the pen tube cap 4, and is in the initial position.

[0049] The FPC antenna mount 10 is a cylindrical plastic component housed between the tail button spring 22 and the rear button plate 7. Its cylindrical structure encloses the rear section of the tail button spring 22 and part of the tail end of the rear button plate 7, serving as a structural frame and support. The axial length of the FPC antenna mount 10 is approximately 2 to 3 times the free length of the tail button spring 22.

[0050] The FPC antenna 9 is attached and fixed to the outer surface of the FPC antenna holder 10; the outer surface of the FPC antenna holder 10 is provided with a planar area for attaching the FPC antenna 9. The FPC antenna 9 is electrically connected to the antenna solder joint on the rear button board 7 through a lead wire passing through the inner hole of the FPC antenna holder 10, and then connected to the RF pin of the main control chip 19 through PCB traces.

[0051] The FPC antenna 9 is physically independent of the battery housed inside the pen tube 1. The FPC antenna 9 and the battery are arranged at intervals along the axial direction of the pen tube 1, and the FPC antenna 9 is not attached to the outer surface of the battery. This independent arrangement allows the size, shape, and wiring design of the FPC antenna 9 to be unrestricted by the battery specifications, and the antenna performance can be independently optimized according to the Bluetooth communication frequency band.

[0052] The assembly relationship of the above-mentioned components makes the push rod of the tail button 21, the tail button spring 22, the FPC antenna mount 10 and the third micro switch 18 form a coaxial force transmission path in the axial direction of the pen tube 1; the push rod of the tail button 21 extends inward through the center of the tail button spring 22, and the end of the push rod is opposite to the pressing surface of the third micro switch 18 on the front of the rear button plate 7.

[0053] The working process of this utility model embodiment is as follows:

[0054] When the user presses the pressing end of the tail button 21, the tail button 21 moves into the pen tube 1 along the axis of the pen tube 1; the push rod of the tail button 21 moves inward synchronously, and its end triggers the third micro switch 18 on the front of the rear button plate 7; at the same time, the tail button spring 22 is compressed inside the pressing end driven by the push rod, storing the rebound energy.

[0055] After receiving the signal from the third micro switch 18, the main control chip 19 determines whether the button event is a short press or a long press based on the duration of the press, and executes the corresponding function, such as powering on, powering off, or taking a screenshot.

[0056] When the user releases the tail button 21, the tail button spring 22 returns to its initial length under the action of elasticity, pushing the pressing end of the tail button 21 to move outward along the axis of the pen tube 1. The end of the push rod leaves the pressing surface of the third micro switch 18, the pressing state of the third micro switch 18 is released, and all components return to their initial positions.

[0057] During Bluetooth communication, the main control chip 19 transmits radio frequency signals to the FPC antenna 9 for wireless radiation via PCB traces, antenna solder points on the rear button board 7, and leads of the FPC antenna 9. Since the FPC antenna 9 is located at the tail of the pen tube 1, far from the battery and main control chip 19 in the middle of the pen body, the metal battery casing and high-density circuitry have minimal impact on the radiation performance of the FPC antenna 9, effectively ensuring Bluetooth signal strength and communication stability.

[0058] Furthermore, during production and assembly, the tail button 21, tail button spring 22, FPC antenna mount 10, and FPC antenna 9 can be pre-assembled into a pen tail assembly, and then the pen tail assembly can be installed into the pen tube end cap 4, simplifying the overall assembly process.

[0059] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model.

Claims

1. A tail assembly structure for a smart pen with an independent tail button, comprising a pen tube (1), a pen tube cap (4) installed at the rear end of the pen tube (1), and a rear button plate (7) housed inside the pen tube (1), characterized in that: The end face of the pen tube end cap (4) is provided with a button opening. The pen tube end cap (4) contains, in sequence along the axial direction of the pen tube (1), a tail button (21), a tail button spring (22), an FPC antenna mount (10) and an FPC antenna (9). The tail button (21) includes a pressing end and a push rod connected to the pressing end. The pressing end protrudes outward through the button opening on the end face of the pen tube cap (4). The tail button spring (22) is sleeved around the push rod. One end of the tail button spring (22) abuts against the inner side of the pressing end, and the other end abuts against the FPC antenna mount (10). The FPC antenna mount (10) is a cylindrical structure that wraps around the tail button spring (22) and part of the tail end of the rear button plate (7); the FPC antenna (9) is pasted and fixed to the surface of the FPC antenna mount (10); A third micro switch (18) is provided at the front end of the rear button plate (7), and the pressing direction of the third micro switch (18) is towards the end face of the pen tube cap (4). The push rod of the tail button (21), the tail button spring (22), the FPC antenna mount (10) and the third micro switch (18) are arranged coaxially in the axial direction of the pen tube (1). The end of the push rod passes through the center of the tail button spring (22), so that the pressing force of the tail button (21) can directly trigger the third micro switch (18) through the end of the push rod. The tail button spring (22) is used to provide a rebound force after the press is released.

2. The intelligent pen tail assembly structure according to claim 1, characterized in that: The FPC antenna (9) is electrically connected to the antenna solder joint on the rear keypad (7) by a lead wire passing through the inner hole of the FPC antenna mount (10).

3. The intelligent pen tail assembly structure according to claim 1, characterized in that: The FPC antenna (9) is attached and fixed to the surface of the FPC antenna mount (10). The FPC antenna (9) is physically independent of the battery disposed in the pen tube (1). The FPC antenna (9) and the battery are arranged at intervals in the axial direction of the pen tube (1) and are not attached to the outer surface of the battery.

4. The intelligent pen tail assembly structure according to claim 1, characterized in that: The pen tube end cap (4) is connected to the pen tube (1) by a snap-fit ​​structure or an interference fit, and the outer diameter of the pen tube end cap (4) is the same as that of the pen tube (1).

5. The intelligent pen tail assembly structure according to claim 1, characterized in that: The pressing end of the tail button (21) is a dome-shaped arc surface, and the end face area of ​​the pressing end accounts for 1 / 3 to 1 / 2 of the end face area of ​​the pen tube cap (4).

6. The intelligent pen tail assembly structure according to claim 1, characterized in that: The FPC antenna mount (10) is made of plastic. The outer surface of the FPC antenna mount (10) is provided with a planar area for pasting and fixing the FPC antenna (9). The axial length of the FPC antenna mount (10) is 2 to 3 times the free length of the tail button spring (22).

7. The intelligent pen tail assembly structure according to claim 1, characterized in that: The rear button plate (7) is a long strip PCB board, and the third micro switch (18) is located at the end of the rear button plate (7) in the length direction. The body of the third micro switch (18) is located in the extended projection range of the FPC antenna mount (10) in the axial direction of the pen tube (1), so that the push rod end of the tail button (21) extends axially through the inner hole of the FPC antenna mount (10) to the pressing surface of the third micro switch (18).

8. The intelligent pen tail assembly structure according to claim 1, characterized in that: The rear button board (7) has an antenna solder joint at its tail end; the rear button board (7) also has a main control chip (19); the FPC antenna (9) is soldered to the antenna solder joint by a lead wire and connected to the RF pin of the main control chip (19) via the PCB trace on the rear button board (7).

9. The intelligent pen tail assembly structure according to claim 1, characterized in that: The tail button spring (22) is a helical compression spring. In its natural state, the tail button spring (22) causes the pressing end of the tail button (21) to protrude from the end face of the pen tube cap (4). In the pressing state, the tail button (21) moves into the pen tube (1), the tail button spring (22) is compressed, and the end of the push rod triggers the third micro switch (18).

10. The intelligent pen tail assembly structure according to claim 1, characterized in that: The tail button (21), the tail button spring (22), the FPC antenna mount (10) and the FPC antenna (9) are pre-assembled into a pen tail assembly, which is installed inside the pen tube cap (4).

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