Stylus

Abstract

A stylus, comprising a housing assembly, a pen tip, a camera device, and a pressure-sensitive assembly. At least part of the camera device is connected to the pen tip to synchronously move with the pen tip relative to the housing assembly. The camera device can be used for acquiring an environment image around the pen tip, the environment image being used for determining the position of the pen tip. At least part of the pressure-sensitive assembly is connected to the camera device, and is used for detecting pressure applied to the pen tip. In the present application, the camera device and the pen tip can move synchronously relative to the housing assembly, thereby ensuring that the distance between the tip of the pen tip and the camera device remains constant during writing, thus ensuring the precision and quality of an image acquired by the camera device. In addition, at least part of the pressure-sensitive assembly can be connected to the camera device, so that by integrating the pen tip, the camera device and the pressure-sensitive assembly, excessive occupation of the space inside the stylus can be effectively reduced, thereby improving the integration of the structure, and facilitating miniaturization design of the stylus.

Description

stylus

[0001] This invention claims priority to Chinese patent application filed on November 5, 2024, with application number 202411566458.3 and title "Stylus Pen", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic device technology, and more specifically to a stylus. Background Technology

[0003] Currently, most styluses are capacitive pens that can be used on touchscreens. Capacitive pens integrate electrodes and pressure-sensitive devices. These types of styluses have high requirements for the screen and limited application scenarios. In addition, some styluses have separate pressure-sensitive devices and camera devices, which require a large space inside the stylus, resulting in a larger overall size. Furthermore, the camera device is usually located off-axis of the stylus, which can easily cause significant obstruction of the camera device when holding the stylus, making it difficult to hold the stylus freely and resulting in a poor user experience. Summary of the Invention

[0004] In view of this, this application provides a stylus to solve the problems of limited application scenarios of styluses in the prior art, and the large size of the stylus and the large area obstructed by the camera device caused by the separate arrangement of the pressure-sensitive device and the camera device in the stylus.

[0005] This application provides a stylus, comprising a housing assembly, a pen tip, a camera device, and a pressure-sensitive component. At least a portion of the camera device is connected to the pen tip for synchronous movement relative to the housing assembly. At least a portion of the pressure-sensitive component is connected to the camera device for detecting pressure applied to the pen tip. The camera device acquires an environmental image of the area surrounding the pen tip; the environmental image is used to determine the position of the pen tip. The position of the pen tip can be the location where it contacts a touch surface (such as a display screen). Understandably, the contact position between the pen tip and the touch surface can be a region, but can be calculated and converted into point coordinates or region coordinates to represent the pen tip position; alternatively, the pen tip position can also be the position of a designated marker on the pen tip. Once determined, the pen tip position can be used in various possible application scenarios, such as correspondingly displaying handwriting on the touch surface based on the determined pen tip position, or controlling or displaying effects on objects on the touch surface.

[0006] In this application, at least a portion of the camera device is connected to the pen tip, enabling the camera device and the pen tip to move synchronously relative to the housing assembly. This ensures that the distance between the pen tip and the camera device remains constant during writing, thereby guaranteeing the accuracy and quality of the image acquired by the camera device. Furthermore, at least a portion of the pressure-sensitive component can be connected to the camera device. By integrating the pen tip, camera device, and pressure-sensitive component into a single unit, excessive space occupancy within the stylus can be effectively reduced, increasing the structural integration and facilitating miniaturization of the stylus design.

[0007] In one possible implementation, the projection of the pressure-sensitive component along the length of the stylus at least partially overlaps with the projection of the camera device, thereby enabling the stylus to be smaller in the direction perpendicular to the length direction, i.e., the stylus can be made thinner, which is beneficial to improving the user experience.

[0008] In one possible implementation, the projections of the camera module and the pressure-sensitive component along the length of the stylus coincide with the central axis of the stylus. The stylus's cross-sectional shape perpendicular to its length can be circular, elliptical, triangular, etc., and the straight line passing through the center of these cross-sectional shapes and extending along the length of the stylus is the central axis of the stylus. In this embodiment, the central axis passes through the camera module and the pressure-sensitive component along the length of the stylus, allowing light to be transmitted to the camera module from all directions around the pen tip. This increases the image range captured by the camera module through the pen tip, and allows for random pen grip without significant obstruction of the camera module. It also saves space within the stylus perpendicular to its length, enabling a thinner stylus design and improving the user experience.

[0009] In one possible implementation, the camera device includes a camera module and a support assembly. Both the camera module and the pen tip are connected to the support assembly, which is movably disposed within the housing assembly. At least a portion of the pressure-sensitive component is connected to the support assembly. The support assembly enables the camera module to be mounted and secured, ensuring reliable support for both the camera module and the pressure-sensitive component, and facilitating the installation of the camera module within the stylus.

[0010] In one possible implementation, the support assembly includes a first support and a second support. The camera module is connected to the second support. The pen tip is connected to the first support. The first and second supports provide reliable support for the pen tip and the camera module, while also facilitating assembly.

[0011] In one possible implementation, at least a portion of the pressure-sensitive component is connected to the first bracket, and at least a portion of the first bracket is movably disposed within the housing assembly. The first bracket may have a considerable length, a portion of which may be located outside the second housing for connection to the pen tip, and another portion of which may be located inside the first housing and slidably connected to it. At least a portion of the elastic element in the pressure-sensitive component may be mounted on the portion of the first bracket extending into the first housing, thereby enabling the first bracket, the second bracket, and the camera module to move synchronously via the pen tip.

[0012] In one possible implementation, at least a portion of the pressure-sensitive component is connected to the second bracket, and at least a portion of the second bracket is movably disposed within the housing assembly. The second bracket may have a considerable length, and at least a portion of the second bracket may extend into the first housing and be movable relative to the first housing. At least a portion of the elastic element in the pressure-sensitive component may be mounted on the second bracket, extending into the first housing. This embodiment can also achieve synchronized movement of the first bracket, the second bracket, and the camera module.

[0013] In one possible implementation, the first bracket has a through hole, and at least a portion of the camera module is housed within the through hole for acquiring an environmental image of the area surrounding the pen tip through the through hole and the pen tip. The shape of the through hole can be consistent with the shape of the camera module. When the camera module is housed within the through hole, the side of the camera module can abut against the inner wall of the through hole, thereby limiting the position of the camera module through the inner wall of the through hole, ensuring the stability of the camera module installation, and providing protection for the camera module.

[0014] In one possible implementation, the first bracket is connected to the second bracket. The first and second brackets can be manufactured independently and can be detachably connected, for example, by screws, thus facilitating control over their installation accuracy. In some embodiments, the first bracket 321 and the second bracket 322 can be welded together to ensure reliable connection. In one embodiment, the first bracket and the second bracket are integrally formed. The first and second brackets can be molded as a single unit during manufacturing, eliminating the need for assembly and simplifying stylus assembly. This reduces the number of parts and improves structural reliability.

[0015] In one possible implementation, the pressure-sensitive component includes an elastic element and a pressure-sensitive device. At least a portion of the elastic element is connected to the housing assembly, and at least another portion of the elastic element is connected to the camera device. The at least portion of the elastic element is elastically deformed along the length of the stylus by the camera device. The pressure-sensitive device is connected to the elastically deformable portion of the elastic element. When the camera device includes a support assembly, at least a portion of the elastic element can be connected to the support assembly. When the support assembly moves relative to the housing assembly, the support assembly can drive at least a portion of the elastic element to move along the length of the stylus. Since the portion of the elastic element connected to the housing assembly does not move, the at least a portion of the elastic element can elastically deform during movement. Simultaneously, pressure-sensitive devices, such as strain gauges, also move and deform with the elastic element. This causes a change in the distance between some resistors inside the strain gauge, resulting in a change in resistance value. The motherboard can obtain the corresponding pressure value based on the change in resistance value, thereby achieving pressure detection.

[0016] In one possible implementation, the elastic element includes a first segment and a second segment, the first segment being connected to the support assembly. One end of the second segment is connected to the first segment and bent relative to the first segment, while the end of the second segment away from the first segment is connected to the housing assembly. The pressure-sensitive device is connected to the second segment. The first and second segments are bent at a certain angle, facilitating the connection of the second segment to the housing assembly while ensuring that the first segment can move along the length of the stylus with the support assembly. Since the end of the second segment connected to the housing assembly remains in a fixed position relative to the housing assembly, while the end of the second segment connected to the first segment moves with the first segment, the second segment undergoes elastic deformation, allowing pressure-sensitive devices such as strain gauges connected to the second segment to detect pressure changes through positional variations.

[0017] In one possible implementation, at least two second segments are provided, with at least two second segments connected to the first segment at intervals. The reliability of the connection between the elastic element and the housing assembly can be ensured by the at least two second segments, while also ensuring the reliability of the support for the camera device and the pen tip.

[0018] In one possible implementation, the pressure-sensitive component further includes a reinforcing member connected to the first segment. The first segment of the elastic member is connected to the support assembly. By providing the reinforcing member, the reliability of the connection between the first segment and the support assembly can be ensured, preventing deformation or movement of the first segment relative to the support assembly, thereby ensuring synchronous movement between the first segment and the support assembly.

[0019] In one possible implementation, the camera device includes a limiting portion whose projection along the length of the stylus at least partially coincides with the projection of the end face of the housing assembly, and a gap exists between the limiting portion and the end face of the housing assembly when the stylus tip is not under pressure. The gap between the limiting portion on the support assembly and the end face of the housing assembly when the stylus tip is not under pressure defines the maximum travel distance of the stylus tip. By allowing the stylus tip to move within the range defined by this gap, the user experience is ensured, while also guaranteeing the accuracy of pressure detection by the pressure-sensitive component.

[0020] In one possible implementation, the housing assembly includes a first housing and a second housing. At least a portion of the camera device and the pressure-sensitive component are disposed in the first housing, and at least a portion of the pressure-sensitive component is connected to the first housing. The second housing is sleeved on the outside of the first housing. When the pen tip is not under pressure, there is a gap between the limiting portion and the end face of the second housing. The first housing protects the pressure-sensitive component and the camera device, and also facilitates their installation. The second housing provides aesthetic appeal, and its outer surface is the surface directly in contact with the user's hand. The surface of the second housing can undergo special processing, such as painting, sanding, or coating. These surface treatments can be performed on the independently manufactured second housing without affecting the first housing or the structures and devices mounted on it, thus facilitating operation.

[0021] In one possible implementation, the stylus further includes a motherboard, which includes at least one processing device for acquiring an environmental image transmitted by the camera device and a voltage signal transmitted by the pressure-sensitive component. The processing device can calculate the position and pressure of the stylus tip based on the voltage signal and the environmental image, and can transmit the position and pressure information of the stylus tip to the screen to display the handwriting on the screen.

[0022] In one possible implementation, the stylus further includes a motherboard, which is disposed within the housing assembly and located on the side of the pressure-sensitive component away from the pen tip. Both the camera device and the pressure-sensitive component are electrically connected to the motherboard. The motherboard's location on the side of the pressure-sensitive component away from the pen tip, meaning the camera module, pressure-sensitive component, and motherboard are arranged sequentially along the length of the stylus, helps to reduce the radial size of the stylus and improve the user experience.

[0023] In one possible implementation, the pressure-sensitive device is a strain gauge. The strain gauge can be connected to a portion of the elastic element capable of elastic deformation. Exemplarily, the strain gauge can be fixed to the support assembly by means of, but not limited to, adhesive bonding or welding. The strain gauge can be connected to the motherboard via a transmission line such as a flexible circuit board. The strain gauge contains multiple resistors spaced apart. When the camera device causes elastic deformation in a portion of the elastic element via the support assembly, the strain gauge also moves and deforms along with the elastic element. This causes a change in the distance between the resistors inside the strain gauge, resulting in a change in resistance value. The motherboard can obtain the corresponding pressure value based on the change in resistance value, thereby achieving pressure detection.

[0024] In one possible implementation, the pen tip is made of a light-transmitting material. The light transmitted through this material into the pen tip can then enter the camera module, allowing the camera module to capture images such as handwriting. Therefore, by using a pen tip made of a light-transmitting material, obstruction of the internal camera module can be avoided, allowing for greater flexibility in the placement and arrangement of the camera device.

[0025] In one possible implementation, the pen tip is detachably connected to the camera device, thereby facilitating the removal and replacement of the pen tip.

[0026] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a schematic diagram of a stylus in related technologies;

[0029] Figure 2 is a schematic diagram of the structure of the stylus provided in an embodiment of this application;

[0030] Figure 3 is an exploded view of the stylus provided in an embodiment of this application;

[0031] Figure 4 is an exploded view of the housing assembly provided in an embodiment of this application;

[0032] Figure 5 is a magnified view of a portion of point A in Figure 2;

[0033] Figure 6 is a schematic diagram of the structure of a camera device provided in one embodiment of this application;

[0034] Figure 7 is a partial cross-sectional view of the stylus provided in an embodiment of this application;

[0035] Figure 8 is a magnified view of point B in Figure 7;

[0036] Figure 9 is a schematic diagram of the cooperation between the pen tip, camera device and pressure rod assembly in the stylus provided in the embodiment of this application;

[0037] Figure 10 is a partial cross-sectional view of the pressure-sensitive component, camera device and housing assembly in the stylus provided in the embodiment of this application when they are in combination.

[0038] Figure 11 is a partial exploded view of the stylus provided in an embodiment of this application;

[0039] Figure 12 is a magnified view of a portion of point C in Figure 7;

[0040] Figure 13 is an exploded view of the camera module and the first bracket in the stylus provided in the embodiment of this application;

[0041] Figure 14 is a partial cross-sectional view of a stylus provided in one embodiment of this application;

[0042] Figure 15 is a partial cross-sectional view of a stylus provided in another embodiment of this application;

[0043] Figure 16 is an exploded view of the stylus camera device and pressure-sensitive component provided in the embodiments of this application;

[0044] Figure 17 is a cross-sectional view of the stylus provided in the embodiment of this application when it is not writing;

[0045] Figure 18 is a cross-sectional view of the stylus provided in the embodiment of this application during writing;

[0046] Figure 19 is a side view of the elastic element in a stylus provided in an embodiment of this application;

[0047] Figure 20 is a side view of the elastic element in a stylus provided in another embodiment of this application;

[0048] Figure 21 is a partial cross-sectional view of the stylus provided in an embodiment of this application.

[0049] Reference numerals: 100-Stylus pen; 110-Pressure-sensitive device; 120-Camera device; 130-Pen tip; 1000-Stylus pen; 1-Housing assembly; 11-First housing; 12-Second housing; 2-Pen tip; 21-Pen tip; 3-Camera device; 31-Camera module; 32-Bracket assembly; 321-First bracket; 321a-Limiting part; 321b-Through hole; 322-Second bracket; 4-Pressure-sensitive assembly; 41-Elastic element; 411-First segment; 412-Second segment; 42-Pressure-sensitive device; 43-Reinforcing element; 5-Main board; 6-Flexible circuit board; G1-Gap; G2-Gap; X-Length direction; Y-Radial direction; C-Central axis. Detailed Implementation

[0050] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0051] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0052] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0053] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0054] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] With the development of electronic technology, styluses have been widely used for screen writing. Most styluses are capacitive pens that can be used on touchscreens. These capacitive pens integrate electrodes and pressure-sensitive devices, allowing the pen to interact with the screen via capacitive sensing. The pen tip can detect changes in capacitance on the device's screen, thereby transmitting the user's actions to the device. However, these capacitive pens have high requirements for the screen, needing a built-in functional module that can work with the pen's electrodes and other components. This limits the application scenarios of capacitive pens.

[0056] In addition, some styluses can also be non-capacitive styluses, which can be used on non-touch screens. Figure 1 is a schematic diagram of a stylus in the related art. As shown in Figure 1, this type of stylus 100 can be equipped with a pressure-sensitive device 110 and a camera device 120. The pressure-sensitive device 110 can detect the pressure change of the pen tip 130 during writing. For example, when the pen tip 130 is subjected to pressure during writing, it will move slightly in the length direction X of the stylus 100. The movement of the pen tip 130 can drive the pressure-sensitive device 110 to move, and the pressure-sensitive device 110 can detect the pressure change at the pen tip 130 through this movement. The camera device 120 can capture the written handwriting.

[0057] However, the pressure-sensitive device 110 and the camera device 120 within this type of stylus 100 usually need to be set up separately, occupying a large space within the stylus 100 and resulting in a large overall size. For example, to avoid the pen tip 130 obstructing the shooting area of ​​the camera device 120, the camera device 120 is usually positioned off-center from the central axis C of the stylus 100, thus offsetting the positions of the camera device 120 and the pen tip 130. However, this design requires the stylus 100 to be used in a specific pen-holding posture to ensure that the camera device 120 can capture normal handwriting and other images. If the stylus 100 is rotated at a certain angle during use, the camera device 120 will be rotated to another position around the central axis C of the stylus 100. At this time, the user's hand is very likely to obstruct the camera device 120, causing the camera device 120 to fail to acquire complete handwriting and other images. Therefore, this type of stylus 100 cannot achieve random pen-holding, resulting in a poor user experience. Furthermore, since the pressure-sensitive device 110 and the camera device 120 are set separately, the position of the camera device 120 can remain unchanged when the pen tip 130 moves the pressure-sensitive device 110. This results in the distance between the pen tip 130 and the camera device 120 changing frequently during the writing process, which in turn leads to unstable image quality acquired by the camera device 120.

[0058] Figure 2 is a schematic diagram of the structure of the stylus provided in this embodiment. As shown in Figure 2, this embodiment provides a stylus 1000, which can be applied to the screens of various electronic devices, including capacitive screens or non-capacitive screens. For example, a non-capacitive screen could be a smart screen in a whole-house scenario. Figure 3 is an exploded view of the stylus provided in this embodiment. As shown in Figure 3, the stylus includes a housing assembly 1, a pen tip 2, a camera device 3, and a pressure-sensitive assembly 4. The housing assembly 1 is used to support and install numerous electronic devices and structures. For example, the motherboard 5, flexible circuit board, pressure-sensitive assembly 4, and camera device 3 can all be housed within the housing assembly 1. Simultaneously, the housing assembly 1 can also provide a unique aesthetic effect for the stylus. The housing assembly 1 can be made of materials such as metal or plastic.

[0059] Figure 4 is an exploded view of the housing assembly 1 provided in the embodiment of this application. As shown in Figure 4, the housing assembly 1 may include a first housing 11 and a second housing 12. At least a portion of the camera device 3 and the pressure sensing component 4 are disposed in the first housing 11. The first housing 11 can protect the pressure sensing component 4 and the camera device 3, and also facilitates the installation of the pressure sensing component 4 and the camera device 3. The second housing 12 can be sleeved on the outside of the first housing 11. The second housing 12 and the first housing 11 can be fixedly connected, for example, by means of welding, snap-fit, etc. The second housing 12 can provide an aesthetic effect. At the same time, the outer surface of the second housing 12 is the surface that the user's hand directly contacts. The surface of the second housing 12 can be subjected to special processing, such as painting, sanding, or coating. These surface treatments can all be performed on the independently manufactured second housing 12 without affecting the first housing 11 and the structures and devices installed on the first housing 11, thus facilitating operation.

[0060] In some other embodiments, the housing assembly 1 may include only the first housing 11 or the second housing 12, and the pressure sensing assembly 4 and the camera device 3 may be disposed in the first housing 11 or the second housing 12. This embodiment does not limit this.

[0061] Figure 5 is a magnified view of point A in Figure 2. As shown in Figure 5, the pen tip 2 is the part of the stylus that can write directly on the screen. The pen tip 2 includes a pen tip 21, which is the end of the pen tip 2 and can directly contact the screen to form handwriting. The pen tip 2 can be made of a light-transmitting material, allowing light from outside the stylus to pass through and enter the stylus, where it can be received by the camera device 3. The light-transmitting material can be completely transparent or a non-completely transparent material with light-transmitting capabilities. In some embodiments, the pen tip 2 may also have a hole through which light can enter the stylus; this embodiment does not limit this.

[0062] The camera device 3 is used to acquire environmental images around the pen tip 2. For example, the camera device can acquire handwriting during writing or capture images when not writing. Figure 6 is a schematic diagram of the structure of the camera device 3 provided in one embodiment of this application. As shown in Figure 6, the camera device 3 may include a camera module 31 and a bracket assembly 32. The camera module 31 is connected to the bracket assembly 32. The bracket assembly 32 can realize the installation and fixation of the camera module 31, which can ensure the reliability of the support for the camera module 31 and facilitate the installation of the camera module 31 in the stylus.

[0063] Figure 7 is a partial cross-sectional view of the stylus provided in this embodiment. As shown in Figure 7, both the pen tip 2 and the pressure-sensitive component 4 can be connected to the support assembly 32. The circuit board located within the housing assembly 1 may include a flexible circuit board 6 and a main board 5. The main board 5 may be provided with control circuits, protection circuits, and other circuits. The main board 5 includes at least one processing device, which can be connected to a corresponding circuit. The processing device can analyze and process the environmental image transmitted by the camera device to determine the position of the pen tip 2 based on the environmental image. The processing device is also used to analyze and process the voltage signal transmitted by the pressure-sensitive component 4. The processing device can calculate the position and pressure of the pen tip 2 based on the voltage signal and the environmental image, and can transmit the position and pressure information of the pen tip 2 to the screen to display the handwriting on the screen. The flexible circuit board 6 can be used to transmit current signals. The camera module 31 can be electrically connected to the main board 5 within the stylus. For example, the camera module 31 can be electrically connected to the main board 5 through the flexible circuit board 6 and can be connected to a corresponding circuit. Different functions can be achieved by controlling the camera module 31 through the corresponding circuit on the main board 5 and the controller of the stylus. The camera module 31 faces the side where the pen tip 2 is located. Light transmitted through the light-transmitting material of the pen tip 2 can enter the camera module 31, thereby capturing images of the environment surrounding the pen tip 2. Therefore, by using a light-transmitting material for the pen tip 2, obstruction of the internal camera module 31 can be avoided, allowing for more flexible placement and positioning of the camera device 3.

[0064] In this embodiment, at least a portion of the camera device 3 is connected to the pen tip 2, enabling the camera device 3 and the pen tip 2 to move synchronously relative to the housing assembly 1. At least another portion of the camera device 3 is movably disposed within the housing assembly 1. For example, as described above, when the camera device 3 includes a support assembly 32, the support assembly 32 can support the camera module 31 on one hand, and move relative to the housing assembly 1 on the other hand, thereby driving the camera module 31 to move synchronously relative to the housing assembly 1 through the support assembly 32. During writing, a mutual squeezing force is generated between the pen tip 2 and the screen. This squeezing force causes the pen tip 2 to move relative to the housing assembly 1, that is, the pen tip 2 will move in the length direction X of the stylus. At the same time, the pen tip 2 can drive the camera device 3 to move synchronously through the support assembly 32. Thus, during writing, the distance between the pen tip 21 of the pen tip 2 and the camera device 3 can be kept constant or substantially constant. This constant state can be understood as the unchanging state maintained when the design tolerances and assembly tolerances of each component are ignored, thereby ensuring the accuracy and quality of the images acquired by the camera device 3.

[0065] In one embodiment, FIG8 is a partial enlarged view at point B in FIG7. As shown in FIG8, the camera device 3 may include a limiting part 321a. Along the length direction X of the stylus, the projection of the limiting part 321a at least partially coincides with the projection of the housing assembly 1, and when the pen tip 2 is not under pressure, there is a gap G1 between the limiting part 321a and the end face of the housing assembly 1. Exemplarily, when the housing assembly 1 includes the aforementioned first housing 11 and second housing 12, the first housing 11 is disposed inside the second housing 12, and the limiting part 321a can be limited and engaged with the end face of the second housing 12. When the pen tip 2 is not under pressure, there is a gap G1 between the limiting part 321a on the support assembly 32 and the end face of the second housing 12. This gap G1 limits the maximum stroke that the pen tip 2 can move. By allowing the pen tip 2 to move within the range limited by the gap G1, the user experience can be guaranteed, while ensuring the accuracy of the pressure detection by the pressure-sensitive component 4.

[0066] Figure 9 is a schematic diagram of the cooperation between the pen tip 2, the camera device 3, and the pressure rod assembly in the stylus provided in this application embodiment. As shown in Figure 9, at least a portion of the pressure-sensitive component 4 can be connected to the camera device 3. For example, when the camera device 3 includes a support assembly 32, the pressure-sensitive component 4 can be connected to the support assembly 32, thereby achieving reliable support for the pressure-sensitive component 4 through the support assembly 32. The pressure-sensitive component 4 can be electrically connected to the motherboard through a transmission line such as a flexible circuit board, and can send the detected pressure signal to the controller through the corresponding circuit on the motherboard. The controller can adjust parameters such as the thickness of the pen strokes and the depth of the color according to the pressure signal. Since at least a portion of the pressure-sensitive component 4 is connected to the camera device 3, while the pen tip 2 drives the camera device 3 to move synchronously, the camera device 3 can also drive at least a portion of the pressure-sensitive component 4 to move synchronously. The pressure-sensitive component 4 can detect changes in pressure through this movement. Therefore, by integrating the pen tip 2, camera device 3, and pressure-sensitive component 4 into one unit, the excessive occupation of space inside the stylus can be effectively reduced, the integration of the structure can be improved, and the miniaturization of the stylus can be achieved.

[0067] Furthermore, this embodiment eliminates the need for electrodes in the stylus to interact with the capacitive screen, allowing writing trajectories to be displayed on any type of screen via software, thus reducing screen requirements and expanding the application scenarios of the stylus.

[0068] Figure 10 is a partial cross-sectional view of the pressure-sensitive component 4, camera device 3, and housing assembly 1 in the stylus provided in this embodiment of the application. As shown in Figure 10, the pressure-sensitive component 4 may include an elastic element 4 and a pressure-sensitive device 42. The elastic element 4 can be a structural component capable of elastic deformation to a certain extent after being subjected to force, such as a thin metal sheet or plastic sheet. At least a portion of the elastic element 4 is connected to the housing assembly 1. For example, when the housing assembly 1 includes a first housing 11, at least a portion of the elastic element 4 can be connected to the first housing 11. At least another portion of the elastic element 4 is connected to the camera device 3. For example, when the camera device 3 includes a bracket assembly 32, at least a portion of the elastic element 4 can be connected to the bracket assembly 32. When the bracket assembly 32 moves relative to the housing assembly 1, the bracket assembly 32 can drive at least a portion of the elastic element 4 to move in the length direction X of the stylus. Since the portion of the elastic element 4 connected to the housing assembly 1 does not move, at least a portion of the elastic element 4 can undergo elastic deformation during movement.

[0069] The pressure-sensitive device 42 can be a strain gauge, which can be connected to the elastic part of the elastic element 4 that can undergo elastic deformation. For example, the strain gauge can be fixed to the bracket assembly 32 by means of, but not limited to, adhesive bonding or welding. The strain gauge can be connected to the main board 5 via a transmission line such as a flexible circuit board. The strain gauge contains multiple resistors that are spaced apart. When the camera device 3 causes a portion of the elastic element 4 to undergo elastic deformation via the bracket assembly 32, the strain gauge will also move and deform along with the elastic element 4. This will cause a change in the distance between some of the resistors inside the strain gauge, resulting in a change in the resistance value. The main board 5 can obtain the corresponding pressure value based on the change in resistance value, thereby achieving pressure detection.

[0070] Figure 11 is a partial exploded view of the stylus provided in an embodiment of this application. As shown in Figure 11, as explained above, the camera device 3 may include a camera module 31 and a bracket assembly 32. The bracket assembly 32 may include a first bracket 321 and a second bracket 322, with the second bracket 322 connected to the first bracket 321. The camera module 31 is connected to the second bracket 322, and the pen tip 2 can be connected to the first bracket 321. The pen tip 2 can be detachably connected to the first bracket 321 via a threaded connection or other detachable method, facilitating the disassembly and replacement of the pen tip 2. Of course, in some other embodiments, the pen tip 2 may also be welded to the first bracket 321 to ensure the reliability of the connection between the pen tip 2 and the first bracket 321; this embodiment does not limit this. The first bracket 321 and the second bracket 322 provide reliable support for the pen tip 2 and the camera module 31, and also facilitate assembly.

[0071] In one embodiment, the first bracket 321 and the second bracket 322 can be detachably connected. For example, the first bracket 321 and the second bracket 322 can be detachably connected by screws, thereby facilitating control over the installation accuracy of the first bracket 321 and the second bracket 322. In another embodiment, the first bracket 321 and the second bracket 322 can also be non-detachably connected. For example, the first bracket 321 and the second bracket 322 can be welded together, thereby ensuring the reliability of the connection between the first bracket 321 and the second bracket 322. Of course, in other embodiments, the first bracket 321 and the second bracket 322 can also be connected in other ways, specifically to ensure a reliable connection between the first bracket 321 and the second bracket 322, while ensuring synchronous movement of the first bracket 321 and the second bracket 322.

[0072] In one embodiment, the first support 321 and the second support 322 can also be integrally formed, that is, the first support 321 and the second support 322 can be formed into an integral structure during the manufacturing process, so that the first support 321 and the second support 322 do not need to be assembled, which facilitates the assembly operation of the stylus, reduces the number of parts, and can also improve the reliability of the structure.

[0073] As shown in Figure 11, the first support 321 may be provided with the aforementioned limiting part 321a. The limiting part 321a can be integrally formed during the manufacturing process of the first support 321, thereby ensuring the reliability of the structure of the first support 321 including the limiting part 321a, and facilitating processing and manufacturing. In one embodiment, the limiting part 321a can be a protruding structure protruding from the outer surface of the first support 321. The side of the limiting part 321a facing the pen tip 2 can be used to limit the installation of the pen tip 2, that is, after the pen tip 2 is installed in place on the first support 321, the pen tip 2 can abut against the limiting part 321a. The side of the limiting part 321a facing away from the pen tip 2 can have a gap G1 with the second housing 12, so as to limit the overall movement stroke of the pen tip 2 and the support assembly 32 through the gap G1.

[0074] Furthermore, Figure 12 is a partial enlarged view at point C in Figure 7. As shown in Figure 12, at least a portion of the first bracket 321 can be located inside the second housing 12, and there is a small gap G2 between it and the inner wall of the second housing 12. This avoids frictional resistance between the first bracket 321 and the second housing 12 when the first bracket 321 moves relative to the second housing 12, thereby reducing the pressure transmitted to the pressure sensing component 4 and causing a decrease in pressure detection accuracy.

[0075] Figure 13 is an exploded view of the camera module 31 and the first bracket 321 in the stylus provided in the embodiment of this application. As shown in Figure 13, the first bracket 321 is provided with a through hole 321b, and at least a portion of the camera module 31 can be accommodated in the through hole 321b for acquiring external graphic information through the through hole 321b and the pen tip 2. The shape of the through hole 321b can be consistent with the shape of the camera module 31. When the camera module 31 is accommodated in the through hole 321b, the side of the camera module 31 can abut against the inner wall of the through hole 321b, thereby limiting the position of the camera module 31 through the inner wall of the through hole 321b, ensuring the stability of the camera module 31 installation, and providing protection for the camera module 31. In some other embodiments, there may also be a small gap between the side of the camera module 31 and the inner wall of the through hole 321b, which facilitates the installation of the camera module 31 and avoids wear on the side of the camera module 31 caused by the inner wall of the through hole 321b. The end of the camera module 31 used to acquire images can face the pen tip 2. Since the pen tip 2 is made of light-transmitting material, light can enter the camera module 31 after entering the pen tip 2, so that external graphic information can be acquired through the camera module 31.

[0076] Figure 14 is a partial cross-sectional view of a stylus provided in one embodiment of this application. As shown in Figure 14, at least a portion of the pressure-sensitive component 4 is connected to the first bracket 321, and at least a portion of the first bracket 321 is movably disposed within the housing assembly 1. The first bracket 321 may have a relatively large length. A portion of the first bracket 321 may be located outside the second housing 12 to facilitate connection with the pen tip 2. Another portion of the first bracket 321 may be located inside the first housing 11 and be movable relative to the first housing 11. At least a portion of the elastic element 4 in the pressure-sensitive component 4 may be mounted on the portion of the first bracket 321 that extends into the first housing 11. The second bracket 322 may be fixedly connected to the camera module 31, and the second bracket 322 may be mounted on the first bracket 321, thereby enabling the first bracket 321, the second bracket 322, and the camera module 31 to move synchronously under the drive of the pen tip 2.

[0077] Figure 15 is a partial cross-sectional view of a stylus provided in another embodiment of this application. As shown in Figure 15, at least a portion of the pressure-sensitive component 4 is connected to the second bracket 322, and at least a portion of the second bracket 322 is movably disposed in the housing assembly 1. The second bracket 322 may have a relatively large length, and at least a portion of the second bracket 322 may extend into the first housing 11 and be movable relative to the first housing 11. At least a portion of the elastic element 4 in the pressure-sensitive component 4 may be mounted on the second bracket 322, extending into the first housing 11. This embodiment can also achieve synchronous movement of the first bracket 321, the second bracket 322, and the camera module 31.

[0078] In one embodiment, along the length direction X of the stylus, the projection of the pressure-sensitive component 4 at least partially overlaps with the projection of the camera device 3, which helps to make the stylus smaller in the direction perpendicular to the length direction X, that is, the stylus can be made thinner, which helps to improve the user experience.

[0079] For example, as shown in Figure 15, along the length direction X of the stylus, the projections of the camera module 31 and the pressure-sensitive component 4 both coincide with the central axis C of the stylus. The stylus's cross-sectional shape perpendicular to its length direction X can be circular, elliptical, triangular, etc., and the straight line passing through the center of these cross-sectional shapes and extending along the length direction X of the stylus is the central axis C of the stylus. In this embodiment, along the length direction X of the stylus, the central axis C passes through the camera module 31 and the pressure-sensitive component 4, allowing light to be transmitted to the camera module 31 from all directions around the pen tip 2. This increases the image range acquired by the camera module 31 through the pen tip 2, and allows for random pen grip without significant obstruction of the camera module 31. It also saves space within the stylus perpendicular to the length direction X, enabling a thinner stylus design and improving the user experience. It should be noted that the camera module 31 is arranged on the central axis C, which means that the center of the camera module 31 can coincide with the central axis C, or it can be slightly deviated from the central axis C, that is, roughly coincident.

[0080] Figure 16 is an exploded view of the stylus camera device 3 and pressure-sensitive component 4 provided in the embodiments of this application. As shown in Figure 16, the elastic element 4 includes a first segment 411 and a second segment 412. The first segment 411 is connected to the bracket assembly 32. One end of the second segment 412 is connected to the first segment 411 and is bent relative to the first segment 411. The end of the second segment 412 away from the first segment 411 is connected to the housing assembly 1. The pressure-sensitive device 42 is connected to the second segment 412. The first segment 411 and the second segment 412 are bent at a certain angle, which facilitates the connection of the second segment 412 to the housing assembly 1, while ensuring that the first segment 411 can move along the length direction of the stylus with the bracket assembly 32.

[0081] For example, FIG17 is a cross-sectional view of the stylus provided in the embodiment of the present application when it is not writing. As shown in FIG17, in the non-writing state, the first segment 411 and the second segment 412 remain in a natural state. For ease of explanation, taking the included angle α between the first segment 411 and the second segment 412 as 90° in the natural state as an example, in this state, the gap G1 between the limiting part 321a on the bracket assembly 32 and the second housing 12 is at its maximum value.

[0082] For example, Figure 18 is a cross-sectional view of the stylus provided in the embodiment of this application during writing. As shown in Figure 18, in the writing state, the pen tip 2 is subjected to pressure, causing the pen tip 2, the support assembly 32, and the first segment 411 of the elastic member 4 to move relative to the first housing 11. The gap G1 between the limiting part 321a on the support assembly 32 and the second housing 12 is reduced. Since the end of the second segment 412 connected to the first housing 11 remains in a fixed position relative to the first housing 11, while the end of the second segment 412 connected to the first segment 411 moves with the first segment 411, the second segment 412 can undergo elastic deformation, and the included angle between the first segment 411 and the second segment 412 changes, that is, from the included angle α shown in Figure 17 to the included angle β shown in Figure 18. The pressure-sensitive device 42, such as a strain gauge, connected to the second segment 412 will also deform with the second segment 412, so that the pressure-sensitive device 42 can detect the pressure change through the change in position.

[0083] When the stylus is not in use, the elastic element 4 is in its natural state, and there is a gap G1 between the limiting part 321a on the support assembly 32 and the housing assembly 1. When writing with the stylus, the pen tip 2 is subjected to pressure from the screen, the gap G1 between the limiting part 321a on the support assembly 32 and the housing assembly 1 decreases, and the second segment 412 of the elastic element 4 moves slightly under the influence of the first segment 411, undergoing elastic deformation. When the pressure on the pen tip 2 disappears, the second segment 412 returns to its natural state, thereby enabling the support assembly 32 and the pen tip 2 to return to their initial positions via the first segment 411, ready for the next writing session.

[0084] In one embodiment, as shown in FIG18, at least two second segments 412 are provided, and at least two second segments 412 are connected to the first segment 411 at intervals. The presence of at least two second segments 412 ensures the reliability of the connection between the elastic element 4 and the housing assembly 1, while also ensuring the reliability of the support for the camera device 3 and the pen tip 2. Exemplarily, FIG19 is a side view of the elastic element 4 in a stylus provided in one embodiment of this application. As shown in FIG19, two second segments 412 can be provided, with each second segment 412 respectively located at both ends of the first segment 411, making the elastic element 4 as a whole form a "C" shape, thereby improving the overall structural stability of the elastic element 4. In another embodiment, FIG20 is a side view of the elastic element 4 in a stylus provided in another embodiment of this application. As shown in FIG20, two second segments 412 can also be provided on the portion between the two ends of the first segment 411, meaning the arrangement of the second segments 412 has greater flexibility. In other embodiments, three, four, or more second segments 412 can also be provided, which is not limited in this embodiment. In some other embodiments, there may be only one second segment 412.

[0085] In one embodiment, the elastic element 4 can be a one-piece molded structure, meaning that the first segment 411 and the second segment 412 can be directly molded during the molding process, thereby facilitating manufacturing and improving the reliability of the structure. In this embodiment, the elastic element 4 can be a metal sheet, enabling it to achieve both reliable structural strength and elastic deformation capability.

[0086] Figure 21 is a partial cross-sectional view of the stylus provided in this embodiment. As shown in Figure 21, the portions of the elastic element 4 and the support assembly 32 used for connecting with the elastic element 4 are distributed in the radial direction Y of the stylus, which is perpendicular to the length direction X of the stylus. This allows for full utilization of the space inside the housing assembly 1, avoiding the pressure-sensitive component 4 and the support assembly 32 being distributed in the length direction X, thus avoiding excessive space occupation in the length direction X. This provides more space in the length direction X for arranging components such as the motherboard 5, thereby improving integration and achieving a miniaturized stylus design. The motherboard 5 is located on the side of the pressure-sensitive component 4 away from the pen tip 2; that is, the camera module 31, the pressure-sensitive component 4, and the motherboard 5 are arranged sequentially in the length direction X of the stylus, which helps to reduce the radial Y dimension of the stylus and improve the user experience.

[0087] In one embodiment, as shown in FIG21, the pressure-sensitive component 4 may further include a reinforcing member 43, which is connected to the first segment 411 of the elastic member 4. The first segment 411 of the elastic member 4 is connected to the support assembly 32. By providing the reinforcing member 43, the reliability of the connection between the first segment 411 and the support assembly 32 can be ensured, preventing deformation of the first segment 411 or movement relative to the support assembly 32, thereby ensuring synchronous movement between the first segment 411 and the support assembly 32. The reinforcing member 43 can be connected and fixed to the first segment 411 of the elastic member 4 and the support assembly 32 by screws, thereby ensuring a relatively constant position between the reinforcing member 43, the first segment 411, and the support assembly 32, while facilitating assembly operations.

[0088] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stylus, characterized in that, include: Housing assembly; written; A camera device, at least a portion of which is connected to the pen tip for synchronous movement with the pen tip relative to the housing assembly; the camera device is used to acquire an environmental image around the pen tip; the environmental image is used to determine the position of the pen tip; a pressure-sensitive component, at least a portion of which is connected to the camera device, is used to detect the pressure applied to the pen tip.

2. The stylus according to claim 1, characterized in that, Along the length of the stylus, the projection of the pressure-sensitive component at least partially overlaps with the projection of the camera device.

3. The stylus according to claim 1 or 2, characterized in that, The camera device includes a camera module and a bracket assembly. The camera module and the pen tip are both connected to the bracket assembly. The bracket assembly is movably disposed in the housing assembly. At least a portion of the pressure-sensitive component is connected to the bracket assembly.

4. The stylus according to claim 3, characterized in that, The support assembly includes a first support and a second support; The camera module is connected to the second bracket; The pen tip is connected to the first bracket.

5. The stylus according to claim 4, characterized in that, At least a portion of the pressure-sensitive component is connected to the first bracket, and at least a portion of the first bracket is movably disposed within the housing assembly.

6. The stylus according to claim 4, characterized in that, At least a portion of the pressure-sensitive component is connected to the second bracket, and at least a portion of the second bracket is movably disposed within the housing assembly.

7. The stylus according to claim 4, characterized in that, The first bracket has a through hole, and at least a portion of the camera module is housed in the through hole for acquiring an environmental image of the area around the pen tip through the through hole and the pen tip.

8. The stylus according to any one of claims 4-7, characterized in that, The first bracket is connected to the second bracket; or, the first bracket and the second bracket are integrally formed.

9. The stylus according to any one of claims 1-8, characterized in that, The pressure-sensitive assembly includes an elastic element and a pressure-sensitive device; At least a portion of the elastic element is connected to the housing assembly, and at least another portion of the elastic element is connected to the camera device. At least a portion of the elastic element undergoes elastic deformation in the length direction of the stylus by being driven by the camera device. The pressure-sensitive device is connected to the elastic element at a location where elastic deformation can occur.

10. The stylus according to claim 9, characterized in that, The elastic element includes a first segment and a second segment, wherein the first segment is connected to the bracket assembly; One end of the second segment is connected to the first segment and is bent relative to the first segment, and the end of the second segment away from the first segment is connected to the housing assembly; The pressure-sensitive device is connected to the second segment.

11. The stylus according to claim 10, characterized in that, The second segment is provided in at least two parts, and at least two second segments are connected to the first segment at intervals.

12. The stylus according to claim 10, characterized in that, The pressure-sensitive component also includes a reinforcing member connected to the first segment.

13. The stylus according to any one of claims 1-12, characterized in that, The camera device includes a limiting part, and along the length direction of the stylus, the projection of the limiting part at least partially coincides with the projection of the end face of the housing assembly, and when the pen tip is not subjected to pressure, there is a gap between the limiting part and the end face of the housing assembly.

14. The stylus according to claim 13, characterized in that, The housing assembly includes a first housing and a second housing, at least a portion of the camera device and the pressure-sensitive component are disposed in the first housing, and at least a portion of the pressure-sensitive component is connected to the first housing; The second housing is fitted onto the outside of the first housing; When the pen tip is not under pressure, there is a gap between the limiting part and the end face of the second housing.

15. The stylus according to any one of claims 1-14, characterized in that, It also includes a motherboard, which includes at least one processing device for acquiring environmental images transmitted by the camera device and voltage signals transmitted by the pressure-sensitive component.

16. The stylus according to claim 15, characterized in that, The motherboard is disposed in the housing assembly and is located on the side of the pressure-sensitive component away from the pen tip. Both the camera device and the pressure-sensitive component are electrically connected to the motherboard.

17. The stylus according to any one of claims 9-12, characterized in that, The pressure-sensitive device is a strain gauge.

18. The stylus according to any one of claims 1-17, characterized in that, The pen tip is made of a light-transmitting material to transmit light.

19. The stylus according to any one of claims 1-18, characterized in that, The pen tip is detachably connected to the camera device.

Images