Electronic pen and electronic equipment assembly
By incorporating a transmission bracket and a strain sensor into the electronic pen for direct sensing, the problem of low sensing accuracy of strain sensors is solved, achieving higher sensing accuracy and response speed.
Patent Information
- Application Number
- CN202520250458.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-02-17
AI Technical Summary
In existing electronic pens, the deformation information sensed by strain sensors is the indirect deformation of the elastic body, resulting in low accuracy and delay in the deformation signal.
The design employs a combination of a transmission support and a strain sensor. The transmission support drives the top plate to deform via a pen core, while the strain sensor directly senses the deformation of the top plate to generate an electrical signal, thus reducing energy loss during the deformation transmission process.
The accuracy and response speed of the sensing mechanism have been improved, ensuring that the electronic pen accurately judges the writing intention.
Smart Images
Figure CN223637971U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the utility model relates to electronic pen technical field, in particular to a kind of electronic pen and electronic equipment component. BACKGROUND
[0002] With the development of science and technology, electronic devices such as tablet computers, smart phones, etc. have been widely used in people's daily life and work. These electronic devices usually need to be used with various input devices, among which electronic pens are an important input tool, and are favored because of their high precision, convenience and other characteristics. The electronic pen usually includes a pen shell, a pen core and a sensing mechanism. The pen core and the sensing mechanism are arranged in the pen shell. The pen core is used to contact the screen of the electronic device and transmit touch information. When the pen core is pressed against the screen, a certain pressure change will occur. The sensing mechanism is used to sense this pressure change and convert it into an electrical signal, so that the user's writing intention can be accurately judged according to these electrical signals and real-time feedback can be provided on the electronic device screen, enhancing the input effect and improving the user experience.
[0003] At present, the sensing mechanism usually includes an elastic body and a strain sensor. The elastic body has a U-shaped structure, including a connecting plate and two side plates. The strain sensor and the pen core are arranged on the two side plates of the elastic body. When the pen core is stressed, the pen core drives the deformation of one side plate, and then drives the deformation of the connecting plate and the other side plate in turn. The strain sensor is used to sense the deformation of the other side plate and convert it into an electrical signal.
[0004] In the process of implementing the present application, the inventors have found that the deformation information sensed by the strain sensor is an indirect deformation of the elastic body, and there is energy loss in the transmission process, resulting in low accuracy and delay of the deformation signal sensed by the strain sensor. UTILITY MODEL CONTENT
[0005] In view of the above problems, the embodiment of the utility model provides an electronic pen and an electronic device component, which overcomes the above problems or at least partially solves the above problems.
[0006] To solve the above technical problems, the utility model provides an electronic pen, including pen shell, pen core and sensing mechanism, the pen shell is provided with accommodation cavity and opening, the opening with the accommodation cavity communicates, the opening is located one end of the pen shell, the pen core sets up in the accommodation cavity, the pen core can be along the pen core axle direction relative to the pen shell removes, one end of the pen core can from the opening into and out of the accommodation cavity, the sensing mechanism sets up in the accommodation cavity, the sensing mechanism includes transmission support, elastomer and strain sensor, the elastomer includes top plate and side plate, the side plate is fixed to the pen shell, one end of the transmission support is connected with the other end of the pen core, the other end of the transmission support is connected with the top plate, the strain sensor sets up in the top plate, wherein, when the pen core moves along the pen core axle, the pen core drives the transmission support to move, and then drives the top plate to change shape, the strain sensor is used for inducting the change of the top plate and generating electric signal.
[0007] Optionally, the side plate includes a first side plate and a second side plate, the first side plate and the second side plate are oppositely arranged, the first side plate and the second side plate are respectively connected to two ends of the top plate, and the first side plate and the second side plate are fixedly connected with the pen shell.
[0008] Optionally, the pen shell includes a pen tip sleeve and a pen tube, one end of the pen tip sleeve is provided with an opening, the other end of the pen tip sleeve is connected with the pen tube, the pen tip sleeve is provided with a first cavity, the pen tube is provided with a second cavity, the first cavity and the second cavity are communicated to form the accommodation cavity, and an inner wall of the pen tip sleeve is provided with a first limiting step.
[0009] Optionally, an end of the other end of the pen tip sleeve is provided with a second limiting step, the second limiting step is located at a connection position of the first cavity and the second cavity, one end of the transmission support connected with the pen core is provided with a second limiting protrusion, the second limiting protrusion is located in the second cavity, and the second limiting protrusion is used for abutting against the second limiting step.
[0010] Optionally, the transmission support includes a tube body and a plate body, the tube body is sleeved on the pen core, one end of the tube body is connected with the pen core, an outer wall of the other end of the tube body is provided with a second limiting protrusion, one end of the plate body is connected with the other end of the tube body, and the other end of the plate body abuts against the top plate.
[0011] Optionally, the other end of the transmission support is provided with a protrusion, and the protrusion is in abutment with one side surface of the top plate.
[0012] Optionally, the strain sensor is arranged on the other side surface, and the electronic pen further comprises a circuit board assembly, the circuit board assembly comprises a circuit board and electronic elements, the circuit board comprises a first plate body, a second plate body and a third plate body connected in sequence, the first plate body and the third plate body are oppositely arranged, the transmission support is arranged between the first plate body and the third plate body, and the electronic elements are arranged on the surface of the first plate body facing the transmission support and / or the surface of the third plate body facing the transmission support.
[0013] Optionally, one end of the first plate body away from the pen core extends a connecting portion, the connecting portion is connected with the strain sensor, and the shape of the connecting portion is matched with the shape of the protrusion.
[0014] Optionally, the circuit board is a flexible circuit board.
[0015] To solve the above technical problems, another technical scheme adopted by the utility model is to provide an electronic device assembly comprising an electronic device and the above electronic pen.
[0016] The utility model embodiment has the advantages that unlike the prior art, the utility model embodiment provides an electronic pen and an electronic device assembly, the electronic pen comprises a pen shell, a pen core and a sensing mechanism, the pen shell is provided with a receiving cavity and an opening, the opening is communicated with the receiving cavity, the opening is located at one end of the pen shell, the pen core is arranged in the receiving cavity, the pen core can move along the pen core shaft direction relative to the pen shell, one end of the pen core can enter and exit the receiving cavity from the opening, the sensing mechanism is arranged in the receiving cavity, the sensing mechanism comprises a transmission support, an elastic body and a strain sensor, the elastic body comprises a top plate and a side plate, the side plate is fixed to the pen shell, one end of the transmission support is connected with the other end of the pen core, the other end of the transmission support is connected with the top plate, and the strain sensor is arranged on the top plate, wherein when the pen core moves along the pen core shaft, the pen core drives the transmission support to move, and further drives the top plate to deform, and the strain sensor is used for sensing the deformation of the top plate and generating an electric signal. In the above manner, the strain sensor senses the direct deformation information of the elastic body, reduces the energy loss in the deformation transmission process, and improves the sensing accuracy. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some of the embodiments of the present application, and other drawings can be obtained by the drawings according to the technical scheme of the present application without any creative labor.
[0018] Figure 1 is a perspective view of an electronic pen provided by the embodiments of the present application;
[0019] Figure 2 is an exploded view of the electronic pen provided by the embodiments of the present application;
[0020] Figure 3 is Figure 1 is an enlarged sectional view after cutting along the cutting line AA;
[0021] Figure 4 is a sectional view of the pen shell provided by the embodiments of the present application;
[0022] Figure 5 is an enlarged exploded view of the pen tip sleeve provided by the embodiments of the present application;
[0023] Figure 6 is an enlarged exploded view of the pen refill provided by the embodiments of the present application;
[0024] Figure 7 is an enlarged perspective view of the transmission bracket provided by the embodiments of the present application;
[0025] Figure 8 is an enlarged exploded view of the elastic body and the strain sensor provided by the embodiments of the present application;
[0026] Figure 9 is an enlarged perspective view of the circuit board assembly provided by the embodiments of the present application. DETAILED DESCRIPTION
[0027] In order to facilitate the understanding of the present application, the present application will be described in more detail below in combination with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intermediate elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intermediate elements can be present therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the specification are only for illustrative purposes.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety for the teachings relevant to the sentence and / or paragraph in which the reference is presented.
[0029] Referring to Figure 1 and Figure 2 , the electronic pen 1000 comprises a pen shell 1, a pen core 2, a sensing mechanism 3 and a circuit board assembly 4, the pen core 2, the sensing mechanism 3 and the circuit board assembly 4 are arranged in the pen shell 1, the circuit board assembly 4 is electrically connected with the pen core 2 and the sensing mechanism 3, the pen core 2 is movable relative to the pen shell 1, the sensing mechanism 3 is connected with the pen core 2, and the sensing mechanism 3 is used for sensing the moving position and the stress degree of the pen core 2 and converting into an electric signal.
[0030] For the above-mentioned pen shell 1, please refer to Figures 2 to 4 , the pen shell 1 comprises a pen tip sleeve 11 and a pen tube 12, one end of the pen tip sleeve 11 is provided with an opening 111, the other end of the pen tip sleeve 11 is connected with the pen tube 12, the pen tip sleeve 11 is provided with a first cavity 110, the pen tube 12 is provided with a second cavity 120, and the first cavity 110 and the second cavity 120 are communicated to form a receiving cavity 10. The inner wall of the pen tip sleeve 11 is provided with a first limiting step 112, and the end of the other end of the pen tip sleeve 11 is provided with a second limiting step 113, and the second limiting step 113 is located at the connection of the first cavity 110 and the second cavity 120. The first limiting step 112 is used for abutting against the pen core 2, and the second limiting step 113 is used for connecting with the sensing mechanism 3.
[0031] In some embodiments, please refer to Figure 4 and Figure 5 , the pen tip sleeve 11 comprises a first sleeve 114 and a second sleeve 115, one end of the first sleeve 114 is provided with an opening 111, the other end of the first sleeve 114 is clamped with one end of the second sleeve 115, and the other end of the second sleeve 115 is connected with the pen tube 12. The inner wall of the other end of the first sleeve 114 is provided with a clamping groove, and the outer wall of one end of the second sleeve 115 is provided with a clamping block, and the clamping block is clamped in the clamping groove to realize the clamping of the first sleeve 114 and the second sleeve 115. The inner wall of the second sleeve 115 is provided with a first limiting step 112, and the end of the other end of the second sleeve 115 is provided with a second limiting step 113.
[0032] In some embodiments, the pen tube 12 and the second sleeve 115 are made of metal or alloy material, and the first sleeve 114 is made of plastic material.
[0033] For the above-mentioned pen core 2, please refer to Figure 2 and Figure 6, the refill 2 is arranged in the accommodating cavity 10, and the refill 2 can move relative to the pen shell 1 along the refill axis direction. The refill 2 comprises a refill body 21 and a guide tube 22, the guide tube 22 is located in the first cavity 110, the refill body 21 is at least partially located in the first cavity 110, the guide tube 22 is sleeved and fixed to the outer side of the refill body 21, one end of the refill body 21 can enter and exit the accommodating cavity 10 from the opening 111, the end of the guide tube 22 is flush with the end of the refill body 21, and the other end of the guide tube 22 forms a first limiting protrusion 221, the abutting surface 2211 of the first limiting protrusion 221 is located between the opening 111 and the first limiting step 112, and the abutting surface 2211 is used for abutting with the first limiting step 112. The abutting surface 2211 is arranged in a spaced manner with the first limiting step 112, when the refill 2 is driven to move along the refill axis by an external force, the abutting surface 2211 gradually approaches the first limiting step 112 until the abutting surface 2211 abuts against the first limiting step 112. The initial distance between the abutting surface 2211 and the first limiting step 112 is a preset movement distance of the refill 2, and the abutting of the first limiting protrusion 221 and the first limiting step 112 limits the maximum movement stroke of the refill 2, so as to ensure the stable operation of the refill 2 in the pen shell 1. In addition, the arrangement of the guide tube 22 not only enhances the structural strength of the refill 2, but also plays a guiding role in the linear movement of the refill 2, and reduces the deviation of the refill 2 during writing or stress.
[0034] It should be noted that the refill axis direction refers to the straight line direction followed by the refill 2 when moving in the pen shell 1, that is, the central axis direction determined by the refill body 21 and the guide tube 22. The refill body 21 is a part of the electronic pen 1000 for directly or indirectly contacting the screen of the electronic device and writing or drawing, and the refill body 21 is made of conductive material.
[0035] It can be understood that the structure of the refill 2 is not limited to the above structure, and can also be other structures, for example, in some embodiments, the refill 2 does not arrange the guide tube 22, and the first limiting protrusion 221 is arranged on the outer side of the refill body 21, and the first limiting protrusion 221 is integrally formed with the refill body 21.
[0036] For the above-mentioned sensing mechanism 3, please refer to Figure 2 、 Figure 3 、 Figure 7 and Figure 8 , the sensing mechanism 3 is arranged in the accommodating cavity 10, and the sensing mechanism 3 comprises a transmission bracket 31, an elastic body 32 and a strain sensor 33, one end of the transmission bracket 31 is connected with the other end of the refill body 21, the other end of the transmission bracket 31 is connected with the elastic body 32, and the strain sensor 33 is arranged in the elastic body 32.
[0037] Please refer to Figure 7The transmission support 31 includes a tube 311 and a plate 312. One end of the tube 311 is connected to the pen refill 2, and the other end of the tube 311 is fitted onto the pen refill body 21. The portion of the tube 311 connected to the pen refill body 21 is located between the pen refill body 21 and the guide tube 22. A second limiting protrusion 3111 is provided on the outer wall of the other end of the tube 311. The second limiting protrusion 3111 is located in the second cavity 120 and is used to abut against the second limiting step 113 to limit the movement of the transmission support 31 and the pen refill 2 toward the opening 111, thereby enhancing the connection stability between the transmission support 31, the pen refill 2, and the pen shell 1. One end of the plate 312 is connected to the other end of the tube 311, and the other end of the plate 312 is connected to the elastic body 32.
[0038] Please see Figure 8 The elastic body 32 includes a top plate 321 and a side plate 322. The side plate 322 is fixed to the pen tube 12. One side surface of the top plate 321 is connected to the other end of the plate body 312. The strain sensor 33 is disposed on the other side surface of the top plate 321. The side plate 322 includes a first side plate 3221 and a second side plate 3222, which are distributed opposite to each other. One end of the first side plate 3221 and one end of the second side plate 3222 are respectively connected to the two ends of the top plate 321, and both the first side plate 3221 and the second side plate 3222 are fixedly connected to the pen tube 12. The elastic body 32, which is arranged in a "U" shape, has a simple structure and good structural stability, and can accurately transmit the movement and force of the pen core 2 to the strain sensor 33.
[0039] It should be noted that the other side surface of the top plate 321 refers to the surface of the top plate 321 that is away from the transmission bracket 31 and is set opposite to one side surface of the top plate 321.
[0040] In some embodiments, a protrusion 3121 is provided at the other end of the plate 312. The protrusion 3121 abuts against one side surface of the top plate 321. The protrusion makes the connection between the plate 312 and the top plate 321 more stable, enhances the stability of the structure, and also plays a positioning role, ensuring that the force transmitted from the transmission bracket 31 to the elastic body 32 can be accurately applied to the strain sensor 33, thereby improving the sensitivity and accuracy of the electronic pen 1000 in sensing writing or drawing actions.
[0041] In some embodiments, the strain sensor 33 includes a strain gauge, a Wheatstone bridge, and a signal amplification circuit. The strain gauge is fixed to the top plate 321, and the Wheatstone bridge and signal amplification circuit are disposed on the strain gauge. The strain gauge is used to convert the deformation of the elastic body 32 into a change in resistance. The Wheatstone bridge is used to detect the change in resistance of the strain gauge and convert it into a voltage signal. The signal amplification circuit is used to amplify the voltage signal so that the subsequent circuit board assembly 4 can accurately process and analyze it.
[0042] For the above-mentioned circuit board assembly 4, please refer to Figure 2 , Figure 3 and Figure 9 , the circuit board assembly 4 is arranged in the second cavity 120, the circuit board assembly 4 includes a circuit board 41 and an electronic component 42, the circuit board 41 includes a first board body 411, a second board body 412 and a third board body 413 connected in sequence, the first board body 411 and the third board body 413 are oppositely arranged, the board body 312 of the transmission support 31 is arranged between the first board body 411 and the third board body 413, and the electronic component 42 is arranged on the surface of the first board body 411 facing the board body 312 and / or the surface of the third board body 413 facing the board body 312. The circuit board 41 is arranged around the board body 312, and the electronic component 42 is located between the board body 312 and the circuit board 41, so that the structure is compact and the space in the pen shell 1 is effectively utilized.
[0043] In some embodiments, an end of the first board body 411 away from the refill 2 extends a connecting portion 4111, the connecting portion 4111 is connected with the strain sensor 33, and the extension shape of the connecting portion 4111 matches the shape of the protrusion 3121. In the example as shown in the figure, the side projection of the protrusion is triangular or trapezoidal in shape, the extension shape of the connecting portion 4111 is inclined, and the connecting portion 4111 is arranged in spaced apart relationship with the protrusion 3121.
[0044] It should be noted that the circuit board 41 is a flexible circuit board 41.
[0045] In some embodiments, the circuit board assembly 4 further includes a board-to-board connector 43, the board-to-board connector 43 is arranged on the third board body 413, and the board-to-board connector 43 is used to connect with other circuit boards 41 to realize electrical connection between the circuit board 41 and the other circuit boards 41.
[0046] When the user performs writing or drawing operation on the screen of the electronic device through the electronic pen 1000, the refill 2 of the electronic pen 1000 moves along the refill shaft under the support force of the screen, the refill 2 drives the transmission support 31 to move, and then drives the top plate 321 to deform, the strain sensor 33 is used to sense the deformation of the top plate 321 and generate an electrical signal, and then the electrical signal is transmitted to the circuit board assembly 4 for processing, and then the writing or drawing information is interacted with the electronic device to realize accurate writing or drawing on the screen.
[0047] In the embodiment of the utility model, the electronic pen 1000 is provided with the optimized sensing mechanism 3, and direct and accurate sensing of the moving position and stress degree of the refill 2 is realized. Specifically, the strain sensor 33 is directly arranged on the top plate 321 of the elastic body 32, when the refill 2 is forced to move, the top plate 321 of the elastic body 32 is directly transmitted by the transmission bracket 31, the top plate 321 is deformed, the strain sensor 33 senses the deformation and converts into an electric signal, the energy loss of the deformation in the transmission process is reduced, the accuracy and response speed of the deformation signal sensed by the strain sensor 33 are improved, and thus the writing intention of the user can be more accurately judged.
[0048] The utility model provides electronic equipment component embodiment, electronic equipment component includes electronic equipment and above -mentioned electronic pen 1000, for the structure and function of electronic pen 1000 can refer to the above -mentioned embodiment, this place does not repeat to explain.
[0049] It should be noted that the specification and drawings of the utility model provide a preferred embodiment of the utility model, but the utility model can be realized by many different forms, and is not limited to the embodiments described in the specification, and the embodiments are not as additional limitation to the content of the utility model, and the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Furthermore, the above technical features continue to combine, form various embodiments not listed above, and are considered as the range of the utility model specification; further, for those skilled in the art, the above description can be improved or changed, and all these improvements and changes should belong to the protection scope of the utility model claims.
Claims
1. An electronic pen, characterized by The electronic pen comprises a pen shell, a pen core, and a sensing mechanism. The pen shell is provided with a receiving cavity and an opening, the opening is in communication with the receiving cavity, and the opening is located at one end of the pen shell. The pen core is arranged in the receiving cavity, the pen core can move along the pen core axis relative to the pen shell, and one end of the pen core can enter and exit the receiving cavity from the opening. The sensing mechanism is arranged in the receiving cavity, the sensing mechanism comprises a transmission bracket, an elastic body, and a strain sensor, the elastic body comprises a top plate and a side plate, the side plate is fixed to the pen shell, one end of the transmission bracket is connected to the other end of the pen core, the other end of the transmission bracket is connected to the top plate, and the strain sensor is arranged on the top plate. When the pen core moves along the pen core axis, the pen core drives the transmission bracket to move, thereby causing the top plate to deform, and the strain sensor is used for sensing the deformation of the top plate and generating an electrical signal.
2. The electronic pen according to claim 1, wherein the side plate comprises a first side plate and a second side plate, the first side plate and the second side plate are oppositely arranged, the first side plate and the second side plate are respectively connected to two ends of the top plate, and the first side plate and the second side plate are fixedly connected to the pen shell.
3. The electronic pen according to claim 1, wherein the pen shell comprises a pen tip sleeve and a pen tube, one end of the pen tip sleeve is provided with an opening, the other end of the pen tip sleeve is connected to the pen tube, the pen tip sleeve is provided with a first cavity, the pen tube is provided with a second cavity, the first cavity and the second cavity are in communication to form the receiving cavity, and an inner wall of the pen tip sleeve is provided with a first limiting step. The pen core is at least partially located in the first cavity, an outer wall of the pen core is provided with a first limiting protrusion, an abutting surface of the first limiting protrusion is located between the opening and the first limiting step, the abutting surface is spaced apart from the first limiting step, and the abutting surface is used for abutting against the first limiting step. An end of the other end of the pen tip sleeve is provided with a second limiting step, the second limiting step is located at a connection position of the first cavity and the second cavity; One end of the transmission bracket connected to the pen core is provided with a second limiting protrusion, the second limiting protrusion is located in the second cavity, and the second limiting protrusion is used for abutting against the second limiting step.
4. The electronic pen according to claim 3, characterized in that , The transmission bracket comprises a tube body and a plate body, the tube body is sleeved on the pen core, one end of the tube body is connected to the pen core, an outer wall of the other end of the tube body is provided with a second limiting protrusion, one end of the plate body is connected to the other end of the tube body, and the other end of the plate body abuts against the top plate.
6. The electronic pen according to any one of claims 1-5, wherein the other end of the transmission bracket is provided with a protruding block, and the protruding block abuts against one side surface of the top plate.
5. The electronic pen according to claim 4, characterized in that , 7. The electronic pen according to claim 6, wherein the strain sensor is arranged on the other side surface. The electronic pen further comprises a circuit board assembly, the circuit board assembly comprising a circuit board and electronic components, the circuit board comprising a first board body, a second board body and a third board body connected in sequence, the first board body and the third board body oppositely arranged, the transmission support being arranged between the first board body and the third board body, the electronic components being arranged on a surface of the first board body facing the transmission support and / or a surface of the third board body facing the transmission support.
8. The electronic pen according to claim 7, characterized in that, an end of the first board body away from the refill extends a connecting portion, the connecting portion being connected with the strain sensor, the connecting portion being in a shape matching that of the protrusion.
9. The electronic pen according to claim 7, characterized in that, the circuit board is a flexible circuit board.
10. An electronic device assembly, characterized by The electronic pen according to any one of claims 1-9 is used in an electronic device.