Touch pen

Abstract

The stylus comprises a stylus tube, a flat conductive frame, a stylus head and a pressure sensor, a circuit board is arranged in the stylus tube, the flat conductive frame comprises an elastic conductive part, a first conductive frame body and a second conductive frame body, a first electrode is arranged in the stylus head, and the first electrode is electrically connected with the circuit board; the pressure sensor is configured to send a signal to the circuit board when the pen point moves in the axial direction of the pen tube; according to the touch pen, the thickness of the touch pen is reduced by arranging the flat conductive frame, and meanwhile, the flat conductive frame replaces a traditional conductive circuit, so that the first electrode in the pen point can be directly and electrically connected with the circuit board through the flat conductive frame; the pressure sensor can send a signal to the circuit board when the pen point moves in the axial direction of the pen tube so as to adjust the writing thickness of the pen point, and therefore the using effect of the touch pen is guaranteed, and meanwhile the whole structure of the touch pen is simplified, light and thin.

Description

Technical Field

[0001] The present application relates to the technical field of input devices, and in particular to a stylus pen. Background Art

[0002] A stylus pen, also known as a touch screen pen or electronic screen pen, is a portable and easy-to-use input device that is widely used in 3C electronic products such as laptops, tablets, and mobile phones.

[0003] At present, the overall structure of stylus pens is mostly thick and heavy, which takes up a lot of space when carried. As portable electronic products such as smartphones and tablets gradually develop towards thinness and lightness, how to achieve the simplicity and thinness of the structure while ensuring the use effect of the stylus has become a key issue in the field of stylus design. Summary of the invention

[0004] Based on this, it is necessary to provide a stylus pen to address the problem that the stylus pen has a relatively thick structure and occupies a lot of space when carried.

[0005] A touch pen, comprising:

[0006] The pen barrel has a circuit board inside;

[0007] A flat conductive frame, comprising an elastic conductive member, a first conductive frame and a second conductive frame arranged inside the pen tube, wherein the elastic direction of the elastic conductive member is parallel to the axial direction of the pen tube, and two ends of the elastic direction of the elastic conductive member are respectively connected to the first conductive frame and the second conductive frame;

[0008] The pen tip has a first electrode inside, which is arranged on the flat conductive frame and electrically connected to the circuit board through the flat conductive frame.

[0009] A pressure sensor is arranged between the first conductive frame and the second conductive frame. The pressure sensor is electrically connected to the circuit board and is configured to provide a signal to the circuit board when the pen tip moves along the axial direction of the pen tube.

[0010] In one embodiment, the first conductive frame is provided with a component receiving groove, the pressure sensor is received in the component receiving groove, and a portion of the second conductive frame extends into the component receiving groove and is connected to the pressure sensor; or,

[0011] The second conductive frame is provided with a component accommodating groove, the pressure sensor is accommodated in the component accommodating groove, and a portion of the first conductive frame extends into the component accommodating groove and is connected to the pressure sensor.

[0012] In one embodiment, the cross section of the pen tube perpendicular to its own axis has a first side and a second side, the first side is perpendicular to the second side, and the length of the first side is greater than the length of the second side;

[0013] The second conductive frame has a first surface and a second surface vertically connected,

[0014] The component accommodating groove is formed on the second surface and extends a distance toward the inside of the second conductive frame along the extending direction of the pen tube width. The component accommodating groove penetrates the second conductive frame along the extending direction of the pen tube thickness.

[0015] In one embodiment, the first conductive frame includes a first frame and a bending component, the first frame is located on the outside of the component accommodating groove, and is spaced apart from the second conductive frame along the length extension direction of the pen tube, part of the bending component is located inside the component accommodating groove and connected to the pressure sensor, and another part of the bending component is connected to the first frame.

[0016] In one embodiment, the bending component includes a first bending portion and a second bending portion, the second bending portion is located inside the component accommodating groove and parallel to the first frame, the first bending portion connects the first frame and the second bending portion, and the first bending portion is perpendicular to the first frame.

[0017] In one embodiment, the pressure sensor has a bent flexible circuit board, a portion of the flexible circuit board is located inside the component receiving groove, and another portion of the flexible circuit board passes through the first frame and is connected to the circuit board.

[0018] In one embodiment, the flexible circuit board includes a first circuit board and a second circuit board, the first circuit board is located inside the component accommodating groove, the second circuit board connects the first circuit board and the circuit board, and a portion of the second circuit board is attached to the first bending portion.

[0019] In one embodiment, the elastic conductive member is a flat spring.

[0020] In one embodiment, the first electrode is connected to the flat conductive frame in a detachable manner.

[0021] In one embodiment, the flat conductive frame has a flexible conductive member, and the first electrode is connected to the flexible conductive member in a detachable manner.

[0022] In one embodiment, the pen tube has a flat structure.

[0023] The above-mentioned stylus pen reduces the thickness of the stylus pen by providing a flat conductive frame, and at the same time, the flat conductive frame replaces the traditional conductive circuit, and the flat conductive frame includes an elastic conductive member, a first conductive frame and a second conductive frame. The pressure sensor is located between the first conductive frame and the second conductive frame, so that the first electrode in the pen tip can be directly electrically connected to the circuit board through the flat conductive frame, and the pressure sensor can give a circuit board signal when the pen tip moves along the axial direction of the pen tube to adjust the thickness of the writing of the pen tip, thereby ensuring the use effect of the stylus pen while achieving the simplification and lightness of the overall structure of the stylus pen, thereby solving the problem that the existing stylus pen has a relatively thick structure and occupies more space when carried. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a stylus pen according to some embodiments of the present application.

[0025] Figure 2 This is a schematic diagram of the external structure of a stylus pen according to some embodiments of the present application.

[0026] Figure 3 This is a partial structural schematic diagram of a stylus according to some embodiments of the present application.

[0027] Figure 4 This is a schematic diagram of the structure between the pen tip of the stylus pen and a partially flat conductive frame according to some embodiments of the present application.

[0028] Figure 5 This is a schematic diagram of the structure between the first electrode of the stylus pen and a partially flat conductive frame in some embodiments of the present application.

[0029] Figure 6 This is a schematic diagram of the structure between the second electrode of the stylus pen, the pen head and the circuit board in some embodiments of the present application.

[0030] Reference numerals:

[0031] 1. Pen tube; 11. Circuit board; 12. Flat mounting frame;

[0032] 2. Flat conductive frame;

[0033] 21. Elastic conductive parts;

[0034] 22, first conductive frame; 221, first frame; 222, first connecting portion; 223, slot; 224, first bending portion; 225, second bending portion;

[0035] 23. second conductive frame; 231. second frame; 232. second connecting portion; 233. plugging rod; 234. receiving groove;

[0036] 24. Flexible conductive parts;

[0037] 25. Component receiving slot;

[0038] 3. pen tip; 31. first electrode; 32. insulating pen tip;

[0039] 4. pressure sensor; 41. first insulating part; 42. second insulating part; 43. sensing part; 44. flexible circuit board; 441. first circuit board; 442. second circuit board;

[0040] 5. The second electrode. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0047] Although styluses have been widely used in mobile electronic devices, the storage of styluses has always been one of the design difficulties of various mobile electronic devices. Increasing the space for storing the stylus in the device means reducing the space available for other hardware. Currently, most styluses are designed to be round and the overall structure is relatively thick, which is not conducive to the current industry trend of improving the thinness of mobile electronic devices.

[0048] Therefore, the present application provides a stylus pen with a flat structure, which is lighter and thinner than the existing stylus pen with a circular structure, and can effectively reduce the storage space. And by modifying the internal structure of the stylus pen of the present application, the stylus pen can maintain a flat structure without affecting its normal function, thereby ensuring the use effect.

[0049] See also Figure 1-Figure 3An embodiment of the present application provides a stylus pen, comprising a pen tube 1, a flat conductive frame 2, a pen head 3 and a pressure sensor 4. The pen tube 1 is used to accommodate components such as the flat conductive frame 2 and the pressure sensor 4, and provide a gripping portion for the user. The pen head 3 is located at one end of the pen tube 1 in the direction of the length extension, and provides a writing portion for the user.

[0050] In the specific configuration, a circuit board 11 is provided inside the pen tube 1, and a first electrode 31 is provided inside the pen tip 3. The first electrode 31 is electrically connected to the circuit board 11 through a flat conductive frame 2, so that the first electrode 31 can give a signal to the circuit board 11 when the pen tip 3 is performing a writing operation.

[0051] Among them, the structure of the pen tube 1 is a flat structure. It can be understood that a flat structure is a common concept in the fields of geometric shapes, physical structures or organizational structures, and its definition and characteristics vary depending on the specific application scenario. In the embodiment of the present application, a flat structure refers to a shape with a lower height (thickness) but a larger plane area. Exemplarily, the length of the pen tube 1 is greater than its width, and the width of the pen tube 1 is greater than its height (thickness).

[0052] The flat conductive frame 2 includes an elastic conductive member 21, a first conductive frame 22 and a second conductive frame 23. The elastic direction of the elastic conductive member 21 is parallel to the axial direction of the pen tube 1, and the two ends of the elastic direction of the elastic conductive member 21 are respectively connected to the first conductive frame 22 and the second conductive frame 23. The pen tip 3 is arranged on the first conductive frame 22 or the second conductive frame 23, and can move along the axial direction of the pen tube 1 when the user performs a writing operation, so that the elastic conductive member 21 is deformed.

[0053] The pressure sensor 4 is disposed between the first conductive frame 22 and the second conductive frame 23 and is electrically connected to the circuit board 11. When the user performs a writing operation, the pen tip 3 is subjected to an external force and moves toward the pen tube 1, so that the distance between the first conductive frame 22 and the second conductive frame 23 is shortened. The pressure sensor 4 located between the first conductive frame 22 and the second conductive frame 23 can transmit the detected pressure value to the circuit board 11, so that the circuit board 11 can control the thickness of the line when the pen tip 3 writes according to the detected pressure.

[0054] In summary, when the stylus pen of the present application is used, the pen tip 3 can be brought into contact with the device, so that the pen tip 3 is subjected to pressure and moves toward the pen tube 1. At this time, the position of the first conductive frame 22 remains unchanged, the second conductive frame 23 moves toward the first conductive frame 22 along the axial direction of the pen tube 1, the elastic conductive member 21 enters a compressed state, and the pressure on the pressure sensor 4 decreases. When the pen tip 3 leaves the device and is no longer subjected to pressure, the second conductive frame 23 moves away from the first conductive frame 22 along the axial direction of the pen tube 1 under the elastic force of the elastic conductive member 21 to achieve reset.

[0055] The stylus pen of the present application is designed to have a flat structure as a whole so as to reduce the thickness of the stylus pen. A flat conductive frame 2 is provided to replace the traditional conductive circuit, and the flat conductive frame 2 includes an elastic conductive member 21, a first conductive frame 22, and a second conductive frame 23. The pressure sensor 4 is located between the first conductive frame 22 and the second conductive frame 23, so that the first electrode 31 in the pen tip 3 can be directly electrically connected to the circuit board 11 through the flat conductive frame 2, and the pressure sensor 4 can give a signal to the circuit board 11 when the pen tip 3 moves along the axial direction of the pen tube 1 to adjust the thickness of the writing of the pen tip 3. Thus, while ensuring the use effect of the stylus pen, the overall structure of the stylus pen is simplified and thinned, thereby solving the problem that the existing stylus pen has a relatively thick structure and occupies more space when carried.

[0056] See also Figure 1-Figure 2 , in order to ensure the installation effect of other necessary components such as the circuit board 11, the battery, the magnet, the wireless charging component, etc. In one embodiment, the stylus pen further includes a flat mounting frame 12, which is arranged inside the pen tube 1 and connected to the flat conductive frame 2, and the circuit board 11 is arranged on the flat mounting frame 12.

[0057] Specifically, in order to reasonably allocate the installation structure of the flat mounting frame 12, in the embodiment of the present application, the flat mounting frame 12 includes a plate-shaped frame, and the plate-shaped frame has a mounting surface and a connecting surface that are perpendicular to each other. A mounting groove is provided on the mounting surface, and the circuit board 11 is arranged in the mounting groove. The first conductive frame 22 is arranged on the connecting surface and is electrically connected to the circuit board 11.

[0058] See also Figure 3-Figure 5 , to ensure that the pressure sensor 4 is disposed on the flat conductive frame 2 with conductive effect without short circuit. In one embodiment, the pressure sensor 4 includes a first insulating portion 41, a second insulating portion 42 and a sensing portion 43, the first insulating portion 41 is disposed on the first conductive frame 22, the second insulating portion 42 is disposed on the second conductive frame 23, the sensing portion 43 is located between the first insulating portion 41 and the second insulating portion 42, and is electrically connected to the circuit board 11.

[0059] In one embodiment, the sensing portion 43 is disposed on the second insulating portion 42 and abuts against the first insulating portion 41. That is, the sensing portion 43 has a sensing surface facing the first insulating portion 41 and abutting against the first insulating portion 41. When the pen tip 3 is subjected to an external force and moves toward the pen tube 1, the second conductive frame 23 can move toward the first conductive frame 22 along the axial direction of the pen tube 1, so that the first insulating portion 41 adjusts the pressure applied to the sensing surface, so that the sensing portion 43 can transmit the pressure value to the circuit board 11, so that the circuit board 11 controls the thickness of the line when the pen tip 3 writes according to the detected pressure.

[0060] In another embodiment not shown, the sensing part is arranged on the first insulating part and abuts against the second insulating part. That is, the sensing part has a sensing surface facing the second insulating part and abutting against the second insulating part. When the pen tip is subjected to external force and moves toward the pen tube, the second conductive frame can move toward the first conductive frame along the axial direction of the pen tube, so that the second insulating part adjusts the pressure applied to the sensing surface, so that the sensing part can transmit the pressure value to the circuit board, so that the circuit board controls the thickness of the line when the pen tip writes according to the detected pressure.

[0061] See also Figure 3 , in order to improve the connection stability between the elastic conductive member 21 and the first conductive frame 22 and the second conductive frame 23. In one embodiment, the elastic conductive member 21 is a spring, one end of the spring in the elastic direction is sleeved on a part of the first conductive frame 22, and the other end of the spring in the elastic direction is sleeved on a part of the second conductive frame 23.

[0062] Specifically, the spring is a flat spring. Among them, a flat spring is a spring with a flat cross-section, and its cross-section can be rectangular, elliptical or other flat shapes. This design enables it to have higher strength and rigidity in a specific direction, while maintaining good elasticity in the vertical direction. That is, compared to a circular spring, under the same load, a flat spring has greater elastic force, greater rigidity, more stored energy, and a lower compression height. Therefore, the present application makes the elastic conductive member 21 a flat spring, so that the elastic conductive member 21 can effectively adapt to the flat conductive frame 2 with a flat structure, while providing the flat conductive frame 2 with greater elastic force and more stable performance, so that the use effect of the flat conductive frame 2 is better.

[0063] See also Figure 3-Figure 5 , in order to ensure the sliding connection effect between the first conductive frame 22 and the second conductive frame 23. In one embodiment, the first conductive frame 22 has a first connecting portion 222, and the first conductive frame 22 has a second connecting portion 232, and the first connecting portion 222 and the second connecting portion 232 are slidably connected to achieve the sliding connection between the first conductive frame 22 and the second conductive frame 23.

[0064] Specifically, in one embodiment, the first conductive frame 22 has a first frame 221 and a first connecting portion 222, the first connecting portion 222 is arranged on the side of the first frame 221 facing the second conductive frame 23, and the first connecting portion 222 has a slot 223 on the side facing the second conductive frame 23. The second conductive frame 23 has a second frame 231 and a second connecting portion 232, the second connecting portion 232 is arranged on the side of the second conductive frame 23 facing the first conductive frame 22, and the second connecting portion 232 has an insert rod 233 on the side facing the first conductive frame 22. The insert rod 233 is inserted into the slot 223 to achieve a sliding fit connection between the first connecting portion 222 and the second connecting portion 232.

[0065] In another embodiment not shown, the first conductive frame has a first frame and a first connecting portion, the first connecting portion is arranged on the side of the first frame facing the second conductive frame, and the first connecting portion has an insertion rod on the side facing the second conductive frame. The second conductive frame has a second frame and a second connecting portion, the second connecting portion is arranged on the side of the second conductive frame facing the first conductive frame, and the second connecting portion has a slot on the side facing the first conductive frame. The insertion rod is inserted into the slot to achieve a sliding fit connection between the first connecting portion and the second connecting portion.

[0066] It is understandable that compared to sliding structures such as slide rails that need to be equipped with complex guide rails, sliders, support seats and many other parts, the present application only needs to design and process two main parts, namely the plug rod 233 and the slot 223, which greatly reduces the types and quantities of parts and simplifies the overall structure. Moreover, the connection method between the plug rod 233 and the slot 223 is simple and intuitive. During assembly, there is no need to use complex assembly tools and equipment. The connection can be completed by simply inserting the plug rod 233 into the slot 223. The operation is simple and quick, which greatly improves the assembly efficiency. When the connecting parts need to be disassembled, repaired or replaced, it is only necessary to pull the plug rod 233 out of the slot 223. The disassembly process is also simple and convenient, which facilitates the maintenance and updating of related parts and reduces maintenance costs and time costs.

[0067] See also Figure 3 and Figure 4 , in order to further improve the structural stability of the flat conductive frame 2. In one embodiment, the spring is sleeved on the first connecting portion 222 and the second connecting portion 232. Specifically, the first connecting portion 222 and the second connecting portion 232 are both located on the inner side of the spring, and the two ends of the spring in the elastic direction are respectively in contact with the first frame 221 and the second frame 231. When the first conductive frame 22 moves relative to the second conductive frame 23 along the axial direction of the pen tube 1, the insertion rod 233 moves in the slot 223, and the spring is deformed.

[0068] By sleeve-arranging the spring on the first connection part 222 and the second connection part 232 having the slot 223 and the plug rod 233 structure, the elastic force of the spring can be used to increase the contact pressure between the plug rod 233 and the slot 223, thereby increasing the friction force and making the plug rod 233 more stable when sliding. For example, in the disassembly and assembly structure of the detachable ship cable rack, the elastic restoring force of the second spring allows the plug rod 233 to be tightly inserted into the slot 223, thereby ensuring the sliding stability.

[0069] See also Figure 3 and Figure 5 , in order to further simplify and thin the overall structure of the stylus. In one embodiment, a component receiving groove 25 is provided on the first conductive frame 32, and the pressure sensor 4 is accommodated in the component receiving groove 25, and a part of the second conductive frame 23 extends into the component receiving groove 25 and is connected to the pressure sensor 4; or, a component receiving groove 25 is provided on the second conductive frame 23, and the pressure sensor 4 is accommodated in the component receiving groove 25, and a part of the first conductive frame 32 extends into the component receiving groove 25 and is connected to the pressure sensor 4. The pressure sensor 4 is accommodated by the component receiving groove 35, so as to realize the effective utilization of the space of the flat conductive frame 2 or the first conductive frame 32, and realize the simplification and thinness of the overall structure of the stylus while improving the compactness of the overall structure, so as to solve the problem that the existing stylus structure is relatively heavy and occupies more space when carried.

[0070] Specifically, in the embodiment of the present application, the cross section of the pen tube 1 perpendicular to its own axis has a first side and a second side, the first side is perpendicular to the second side, and the length of the first side is greater than the length of the second side; the second conductive frame 23 has a first surface and a second surface connected vertically, and the component receiving groove 25 is opened on the second surface and extends toward the inside of the second conductive frame 33 along the width extension direction of the pen tube 1, so that when the first conductive frame 22 is combined with the second conductive frame 23 by partially extending into the inside of the component receiving groove 25, the overall thickness of the second conductive frame 23 will not increase, thereby ensuring the effect of solving the problem of the relatively thick structure of the existing stylus. In addition, the component receiving groove 25 penetrates the second conductive frame 23 along the thickness extension direction of the pen tube 1, so as to facilitate the installation of the first conductive frame 22 and components such as the pressure sensor 4. Among them, the component receiving groove 25 can extend toward the inside of the second conductive frame 33 along the width extension direction of the pen tube 1 by a set distance, and the set distance is less than the width of the pen tube 1.

[0071] In order to make the first conductive frame 22 better cooperate with the second conductive frame 23. In one embodiment, the first conductive frame 22 also includes a bending component, the first frame 221 is located outside the component accommodating groove 25, and is spaced apart from the second conductive frame 23 along the length extension direction of the pen tube 1, part of the bending component is located inside the component accommodating groove 25, and is connected to the pressure sensor 4, and the other part of the bending component is connected to the first frame 221. The bending component and the first frame 221 can cooperate to enclose a space for accommodating the elastic conductive member 21, the first connecting portion 222 and the second connecting portion 232, so as to further improve the structural tightness with the second conductive frame 23.

[0072] Specifically, the bending component includes a first bending portion 224 and a second bending portion 225, the second bending portion 225 is located inside the component receiving groove 25 and is parallel to the first frame 221, the first bending portion 224 connects the first frame 221 and the second bending portion 225, and the first bending portion 224 is perpendicular to the first frame 221. When the pen tip 3 is subjected to an external force and moves toward the pen tube 1, and the distance between the first conductive frame 22 and the second conductive frame 23 is shortened, the first conductive frame 22 can be connected to the pressure sensor 4 through the second bending portion 225, so that the pressure sensor 4 transmits the detected pressure value to the circuit board 11, so that the circuit board 11 can control the line thickness of the pen tip 3 when writing according to the detected pressure. In addition, by making the second bending portion 225 parallel to the first frame 221 and the first bending portion 224 perpendicular to the first frame 221, the first conductive frame 22 can minimize the occupation of the internal space of the pen tube 1.

[0073] To further improve the matching effect and structural tightness between the pressure sensor 4 and the first conductive frame 22 and the second conductive frame 23. In the embodiment of the present application, the pressure sensor 4 has a bent flexible circuit board 41, part of the flexible circuit board 41 is located inside the component receiving groove 25, and the other part of the flexible circuit board 41 passes through the first frame 221 and is connected to the circuit board 11. The pressure sensor 4 can transmit the detected pressure value to the circuit board 11 through the flexible circuit board 41.

[0074] Specifically, the flexible circuit board 44 includes a first circuit board 441 and a second circuit board 442. The first circuit board 441 is located inside the component receiving groove 25 and is connected to the sensing part 43 of the pressure sensor 4. The second circuit board 442 connects the first circuit board 441 and the circuit board 11, and part of the second circuit board 442 is attached to the first bending portion 224 to ensure that the flexible circuit board 44 remains stable during use and reduce the loose connection caused by vibration or external force, thereby improving the reliability and stability of the electronic device. More specifically, the first bending portion 224 has a side facing the second conductive frame 23, and part of the second circuit board 442 is attached to the side so that the first bending portion 224 can guide and protect the part of the flexible circuit board 41.

[0075] See also Figure 1 , Figure 2 and Figure 6 In order to obtain the tilt angle of the stylus pen, the use effect of the stylus pen is further improved. In one embodiment, the stylus pen further includes a second electrode 5, which is arranged inside the pen tube 1 and accommodates the flat conductive frame 2. The second electrode 5 is electrically connected to the circuit board 11 and is configured to emit a signal for determining the tilt angle of the stylus pen.

[0076] It can be understood that the first electrode 31 generates a first voltage signal, the second electrode 5 generates a second voltage signal, and the circuit board 11 detects the ratio of the first voltage signal to the second voltage signal or the distance between them to determine the degree of inclination of the stylus. For example, the greater the degree of inclination of the stylus, the closer the ratio of the first voltage signal to the second voltage signal is to 1, and vice versa, the closer it is to zero; the distance between the first voltage signal and the second voltage signal will also increase with the increase of the degree of inclination.

[0077] In addition, in the embodiment of the present application, the second electrode 5 is in a cone barrel structure to improve the matching effect with the appearance of the pen tube 1 .

[0078] To further improve the effect of the cooperation between the first electrode 31 and the second electrode 5. In one embodiment, part of the first electrode 31 is arranged inside the second electrode 5, so that the second electrode 5 can play the role of electromagnetic shielding, isolating part of the first electrode 31 from the external environment. When there is external electromagnetic interference, these interference signals will be absorbed or reflected by the second electrode 5 and cannot directly act on the first electrode 31.

[0079] In addition, when the first electrode 31 is partially located inside the second electrode 5, the second electrode 5 can also affect the electric field distribution, making the electric field lines more inclined to be transmitted between the two electrodes rather than diffuse to the surrounding space. In this way, the electric field strength around the first electrode 31 will be relatively enhanced, and the signal will be more concentrated.

[0080] See also Figure 3-Figure 5 , to facilitate the installation and replacement between the pen tip 3 and the flat conductive frame 2. In one embodiment, the first electrode 31 is connected to the flat conductive frame 2 in a detachable manner. Specifically, the pen tip 3 includes an insulating pen tip 32 and a first electrode 31. The first electrode 31 is inserted into the inside of the pen tip along the axial end of the pen tube 1, and the first electrode 31 is detachably connected to the flat conductive frame 2 along the other axial end of the pen tube 1. This structure can not only make the first electrode 31 and the flat conductive frame 2 detachably connected, so that the assembler can connect the first electrode 31 and the flat conductive frame 2 without complicated welding, riveting and other operations, but also make the insulating pen tip 32 and the first electrode 31 detachably connected, so that the user can replace the insulating pen tip 32 as needed.

[0081] To ensure that the detachable connection does not affect the conductive effect between the first electrode 31 and the flat conductive frame 2. In one embodiment, the flat conductive frame 2 has a flexible conductive member 24, and the first electrode 31 is detachably connected to the flexible conductive member 24. Specifically, a fixing groove is provided on the second conductive frame 23, and the flexible conductive member 24 is disposed in the fixing groove, and one end of the first electrode 31 is inserted into and fixed on the flexible conductive member 24.

[0082] It is understandable that if the first electrode 31 is directly connected to the metal second conductive frame 23, a gap is likely to exist between the first electrode 31 and the second conductive frame 23, thereby affecting the conductive effect and the connection stability. In the present application, the flexible conductive member 24 is used to assist in connecting the two. The softness and high density of the flexible conductive member 24 can effectively ensure the conductive effect and the connection stability between the first electrode 31 and the flat conductive frame 2.

[0083] More specifically, in an embodiment of the present application, the flexible conductive member 24 is conductive silicone. The good flexibility and elasticity of the conductive silicone enable it to maintain stable conductive properties during the detachable connection process. Even in the case of multiple disassembly and reconnection, the conductive silicone will not lose conductivity due to deformation, and is suitable for application scenarios where frequent disassembly and reconnection are required between the pen tip 3 and the flat conductive frame 2. In addition, when the volume resistivity of the conductive silicone is less than 10Ω·cm, the conductive silicone has an electromagnetic shielding function. Therefore, in the connection structure between the pen tip 3 and the flat conductive frame 2 of the present application, the conductive silicone can not only ensure the conductive effect, but also reduce electromagnetic interference and improve the stability and reliability of the signal.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A touch pen, characterized in that: include: A pen tube (1) having a circuit board (11) disposed therein; A flat conductive frame (2), comprising an elastic conductive member (21), a first conductive frame (22) and a second conductive frame (23) arranged inside the pen tube (1), wherein the elastic direction of the elastic conductive member (21) is parallel to the axial direction of the pen tube (1), and the two ends of the elastic direction of the elastic conductive member (21) are respectively connected to the first conductive frame (22) and the second conductive frame (23); A pen tip (3) having a first electrode (31) disposed therein, wherein the first electrode (31) is disposed on the flat conductive frame (2) and is electrically connected to the circuit board (11) via the flat conductive frame (2); A pressure sensor (4) is arranged between the first conductive frame (22) and the second conductive frame (23); the pressure sensor (4) is electrically connected to the circuit board (11) and is configured to provide a signal to the circuit board (11) when the pen tip (3) moves along the axial direction of the pen tube (1).

2. The touch pen according to claim 1, characterized in that: The first conductive frame (32) is provided with a component receiving groove (25), the pressure sensor (4) is received in the component receiving groove (25), and a portion of the second conductive frame (23) extends into the component receiving groove (25) and is connected to the pressure sensor (4); or, The second conductive frame (23) is provided with a component accommodating groove (25), the pressure sensor (4) is accommodated in the component accommodating groove (25), and a portion of the first conductive frame (32) extends into the interior of the component accommodating groove (25) and is connected to the pressure sensor (4).

3. The touch pen according to claim 2, characterized in that: The pen tube (1) has a first side and a second side in a cross section perpendicular to its own axis, the first side is perpendicular to the second side, and the length of the first side is greater than the length of the second side; The second conductive frame (23) has a first surface and a second surface that are vertically connected. The component accommodating groove (25) is provided on the second surface and extends toward the interior of the second conductive frame (23) along the width extension direction of the pen tube (1); the component accommodating groove (25) penetrates the second conductive frame (23) along the thickness extension direction of the pen tube (1).

4. The touch pen according to claim 3, characterized in that: The first conductive frame (22) comprises a first frame (221) and a bending component. The first frame (221) is located outside the component accommodating groove (25) and is spaced apart from the second conductive frame (23) along the length extension direction of the pen tube (1). Part of the bending component is located inside the component accommodating groove (25) and is connected to the pressure sensor (4), and the other part of the bending component is connected to the first frame (221).

5. The touch pen according to claim 3, characterized in that: The bending component includes a first bending portion (224) and a second bending portion (225), the second bending portion (225) is located inside the component accommodating groove (25) and is parallel to the first frame (221), the first bending portion (224) connects the first frame (221) and the second bending portion (225), and the first bending portion (224) is perpendicular to the first frame (221).

6. The touch pen according to claim 5, characterized in that: The pressure sensor (4) has a bent flexible circuit board (44), a portion of the flexible circuit board (44) is located inside the component accommodating groove (25), and another portion of the flexible circuit board (44) passes through the first frame (221) and is connected to the circuit board (11).

7. The touch pen according to claim 6, characterized in that: The flexible circuit board (44) comprises a first circuit board (441) and a second circuit board (442), wherein the first circuit board (441) is located inside the component accommodating groove (25), the second circuit board (442) connects the first circuit board (441) and the circuit board (11), and a portion of the second circuit board (442) is attached to the first bending portion (224).

8. The touch pen according to claim 1, characterized in that: The elastic conductive member (21) is a flat spring.

9. The touch pen according to claim 1, characterized in that: The first electrode (31) is connected to the flat conductive frame (2) in a detachable manner.

10. The touch pen according to claim 1, characterized in that: The pen tube (1) has a flat structure.

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