A structurally compact smart pen

Abstract

The present invention belongs to the technical field of writing intelligent interactive devices, and in particular, relates to a smart pen with a compact structure, which solves the problems of existing smart pens, such as non-compact internal structure arrangement, poor user experience, and high product cost, and provides a smart pen with a compact structure, which includes a hollow pen tube with a storage space for accommodating a core assembly and an image acquisition assembly, and a bracket arranged in the pen tube along the axial direction of the pen tube, wherein a second opening for external light to enter the image acquisition assembly is provided at the first end of the bracket, and a pressure piece, a slider, and a sleeve are sequentially provided on the front side of the rear support plate in a direction away from the pen tip of the core assembly, the core assembly and the sleeve are clamped and fixed on the front side of the rear support plate, and the image acquisition assembly is clamped and fixed on the back side of the rear support plate. The smart pen with a compact structure of the present invention has the advantages of compact internal structure arrangement, good user experience, and reduced product cost.

Description

Technical Field

[0001] The present invention relates to the technical field of writing intelligent interaction devices, and particularly to an intelligent pen with a compact structure. Background Art

[0002] At present, with the popularization of distance education, educational informatization, educational intelligence, and educational Internet of Things, the related technologies of intelligent pens have made great progress. Existing intelligent pens not only have the writing function of traditional pens, but also can collect writing interaction information when writing on a medium with a dot matrix code laid, and electronically store and transmit the writing interaction information. The principle is that on a medium printed or printed with a coordinate dot matrix code (also known as code points, micrographs) that is nearly invisible to the human eye, an intelligent pen integrated with a lens, an image sensor, and a dot matrix code image recognition and decoding module performs writing data collection. When the intelligent pen writes on the medium (such as paper), a handwriting is left on the medium, and at the same time, the dot matrix code image recognition and decoding module processes the digital image to obtain coordinate values (also known as decoding), so as to realize the digital collection of writing interaction (including the digital collection of handwriting coordinates).

[0003] Since an intelligent pen needs to additionally arrange intelligent components inside compared with traditional pens (such as a writing force transmission component with a bushing, an image acquisition component with a lens, a traditional writing pen core component with a pen core with a nib, a circuit board, etc.), and the internal structure layout of existing intelligent pens is not compact enough, which not only leads to high production difficulty and low assembly efficiency, resulting in a low yield of finished products, but also makes the volume of the intelligent pen, especially the volume of the gripping part during writing, too large, bringing a very bad user experience and increasing the product cost.

[0004] Therefore, there is an urgent need to provide a compact intelligent pen with a compact internal structure layout, improved user experience, and reduced product cost. Summary of the Invention

[0005] The present invention aims at the deficiencies of the above-mentioned prior art and provides a smart pen with a compact structure to achieve one of the purposes of the present invention. The smart pen comprises a hollow pen tube with a storage space for accommodating a pen core assembly and an image acquisition assembly, and a bracket arranged in the pen tube along the axial direction of the pen tube. The bracket is configured to be long and has a front support plate. The two back sides of the front support plate are respectively provided with a front side of a rear support plate and a back side of the rear support plate. A pair of first auxiliary support plates and a pair of second auxiliary support plates extending away from each other are respectively provided on both sides of the front side of the rear support plate and the back side of the rear support plate. A pen tip for writing used by the pen core assembly is provided at the first end of the bracket, which extends out of the pen tube. a first opening for allowing external light to enter the image acquisition component and a second opening for allowing external light to enter the image acquisition component; a pressure-bearing piece, a slider and a sleeve are sequentially arranged on the front side of the rear support plate in a direction away from the pen tip of the pen core assembly, and the pressure-bearing piece is fixedly connected to a free end of the pen core assembly opposite to the pen tip; a first pressure sensor is arranged between the slider and the sleeve, a transmission shaft is arranged in the sleeve, and two ends of the transmission shaft are respectively abutted against the slider and a second pressure sensor; the first pressure sensor presses the transmission shaft with the slider in a compressed state to make it slide in the sleeve; the pen core assembly and the sleeve are clamped and fixed on the front side of the rear support plate, and the image acquisition component is clamped and fixed on the reverse side of the rear support plate.

[0006] Furthermore, a pair of positioning ribs are provided on the two opposite inner surfaces of the first auxiliary support plate, and a pair of positioning grooves are provided on the shaft sleeve to be clamped and fixed with the pair of positioning ribs. The pair of positioning ribs are symmetrically arranged relative to the pen center line of the pen core, and the pen center line and the central axis of the transmission shaft are located on the same straight line.

[0007] Furthermore, the surfaces of the slider and the sleeve that are opposite to each other are respectively provided with a countersunk platform and a shoulder that are plugged into each other, and the shoulder is provided with an axial through hole for the transmission shaft to move relative therein. The slider is also provided with an axial hole that is connected to the countersunk platform and aligned with the axial through hole, and a plurality of radially evenly arranged positioning ribs are provided on the inner hole surface of the axial hole, and each positioning rib is pressed and plugged into the outer peripheral surface of the transmission shaft.

[0008] Furthermore, the refill assembly includes a refill with a pen tip and a hollow core sleeve that is sleeved on the outer circumference of the refill and is used to transfer the force acting on the pen tip. The front side of the rear support plate and the first sub-support plate and the second sub-support plate connected to it and facing each other jointly form a circumferential surface that fits the outer circumference of the supporting core sleeve, and a circular arc plate that clamps the outer circumference of the core sleeve is also connected between the first sub-support plate and the second sub-support plate. The pressure-bearing piece is fixedly connected to the end of the core sleeve away from the pen tip, and an elastic claw for radially limiting the pressure-bearing piece is respectively provided on the first sub-support plate and the second sub-support plate.

[0009] Furthermore, a pair of first buckles are protruding from the front support plate, and the image acquisition component includes a accommodating shell having a pair of through slots for the pair of first buckles to pass through respectively, and each first buckle is respectively snapped onto a top surface extending from the corresponding through slot.

[0010] Further, the bracket includes a triangular wedge-shaped protrusion having a first opening and a second opening. An inner groove surrounded by an upper border and side border surfaces located at both ends of the upper border and spaced parallel to each other is provided on the side of the triangular wedge-shaped protrusion facing the front support plate. The front end of the accommodation shell is inserted into the inner groove.

[0011] Further, the smart pen further includes a shell cover arranged outside the accommodation shell. A plurality of first inclined surfaces are provided on the upper border and each side border surface. A cover end surface of the shell cover facing the triangular wedge-shaped protrusion is provided with a plurality of second inclined surfaces that are adapted to the shapes of the respective first inclined surfaces and are in mutual abutment. A pair of second buckles located on both sides of the accommodation shell are provided on the shell cover, and a pair of card slots engaged with the pair of second buckles are provided on the second auxiliary support plate.

[0012] Further, both side surfaces of the accommodation shell are respectively abutted against the first auxiliary support plate and the second auxiliary support plate facing each other, and both side shell plates of the shell cover are respectively pressed and supported on the first auxiliary support plate and the second auxiliary support plate facing each other.

[0013] Further, the smart pen further includes a battery, a first PCB board, and a second PCB board. A pen cap is fixed to the second end of the pen tube opposite to the first end. The first PCB board and the second PCB board are at least partially located inside the pen cap. The first PCB board and the second PCB board are respectively fixed on the front surface and the back surface of the rear support plate, and the first PCB board and the second PCB board are electrically connected by a first flexible circuit board located on the side of both of them.

[0014] Further, a first through hole facing the shaft sleeve and a second through hole facing the image acquisition component and the pen core component are sequentially provided on the front support plate along the axial direction of the pen tube.

[0015] The beneficial effects of the smart pen with a compact structure of the present invention are as follows: By fixing the pen core component and the shaft sleeve to the bracket by means of snap-fitting, both the pen core component and the shaft sleeve can be reliably and stably assembled on the bracket, thereby ensuring excellent assembly of the pen core component and the shaft sleeve, and further ensuring very high quality of digital acquisition of the smart pen. Moreover, by installing the image acquisition component on the back surface of the rear support plate by means of snap-fitting, not only the installation is simplified, but also very high fixing stability is obtained, and the internal structure layout is made compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, and all of these are within the protection scope of the present invention.

[0017] Figure 1And Figure 2 is the overall assembly diagram of the compact smart pen of the present invention from two different perspectives;

[0018] Figure 3 is the schematic cross-sectional view of the compact smart pen of the present invention;

[0019] Figure 4 And Figure 5 is the assembly schematic diagram of the compact smart pen of the present invention with the pen tube omitted and from two different perspectives;

[0020] Figure 6 And Figure 7 is the assembly schematic diagram of the compact smart pen of the present invention mainly showing the stacked and fixed structure of each circuit board from two different perspectives;

[0021] Figures 8 to 10 is the structural schematic diagram of the bracket of the compact smart pen of the present invention from three different perspectives;

[0022] Figure 11 is the structural schematic diagram of the slider of the compact smart pen of the present invention;

[0023] Figure 12 is the structural schematic diagram of the bushing of the compact smart pen of the present invention;

[0024] Figure 13 is the structural schematic diagram of the shell cover of the compact smart pen of the present invention;

[0025] Figure 14 And Figure 15 is the assembly schematic diagram of the button of the compact smart pen of the present invention from two different perspectives;

[0026] Explanation of reference numerals:

[0027] 1 - Pen barrel; 2 - Refill assembly; 2A - Refill; 2B - Nib; 2C - Core round sleeve; 3 - Image acquisition assembly; 31 - Accommodating shell; 32 - Through slot; 33 - Filter; 34 - Lens cap; 35 - Lens module; 4 - Bracket; 401 - Front support plate; 402 - Front side of rear support plate; 403 - Rear side of rear support plate; 404 - First auxiliary support plate; 405 - Second auxiliary support plate; 406 - First opening; 407 - Second opening; 408 - Positioning rib; 409 - Arc plate; 410 - Elastic claw; 411 - First buckle; 412 - Triangular wedge protrusion; 413 - Upper perimeter; 414 - Side perimeter surface; 415 - Card slot; 416 - First through hole; 417 - Second through hole; 418 - Wiring groove; 419 - Insertion post; 420 - First protrusion; 421 - Clamping block; 422 - Second protrusion; 423 - Recess; 5 - Compressed part; 6 - Slide block; 61 - Counterbore; 62 - Axle hole; 63 - Positioning rib; 64 - Boss; 65 - Glue reduction groove; 7 - Bush; 71 - Positioning groove; 72 - Axle shoulder; 73 - Axle through hole; 8 - First pressure sensor; 9 - Transmission shaft; 10 - Second pressure sensor; 11 - Shell cover; 111 - Second buckle; 112 - Cover end face; 12 - Battery; 13 - First PCB board; 131 - First board slot; 14 - Second PCB board; 141 - Second board slot; 15 - Second flexible circuit board; 16 - Pen cap; 17 - Flexible circuit board; 18 - Pen cover; 19 - Button; 191 - Button body; 191A - Mounting hole; 191B - Depression; 191C - Pressing protrusion; 191D - Elastic buckle; 192 - Light guide; 192A - Light transmitting part; 192B - Light guiding part; 192C - Empty slot; 192D - First fastening block; 192E - Second fastening block; 20 - Light source; 21 - Button; 22 - Interface. Detailed implementation mode

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the present invention. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "comprising..." do not exclude the presence of additional identical elements in the process, method, article or device comprising the said elements. If there is no conflict, the embodiments of the present invention and the various features in the embodiments may be combined with each other, and all are within the protection scope of the present invention.

[0029] Reference Figures 1 to 15As an object of the present invention, a smart pen with a compact structure is provided, which includes a hollow pen tube 1 and a bracket 4. A accommodating space for accommodating a pen core component 2 and an image acquisition component 3 is formed in the pen tube 1, wherein the image acquisition component 3 includes a filter 33, a lens cover 34 and a lens module 35, etc. The bracket 4 is arranged in the pen tube 1 along the axial direction of the pen tube 1, which can also be said to be extended along the length direction of the smart pen. The bracket 4 is set to be long and has a front support plate 401. Preferably, a hollow through hole is set on the bracket 4 to facilitate weight reduction and assembly and disassembly of related components. A rear support plate front side 402 and a rear support plate back side 403 are respectively provided on the two back sides of the front support plate 401, and a pair of first sub-support plates 404 and a pair of second sub-support plates 405 extending relatively far from each other are respectively provided on both sides of the rear support plate front side 402 and the rear support plate back side 403. The first end of the bracket 4 is provided with a first opening 406 for the nib 2B of the pen core assembly 2 to extend out of the pen tube 1, and a second opening 407 for external light to enter the image acquisition assembly 3. On the front side 402 of the rear support plate, a pressure-bearing member 5, a slider 6 and a sleeve 7 are sequentially provided in a direction away from the nib 2B of the pen core assembly 2, wherein the pressure-bearing member 5 is in transmission connection with the slider 6, and the pressure-bearing member 5 is fixedly connected with a free end of the pen core assembly 2 opposite to the nib 2B; a first pressure sensor 8 is provided between the slider 6 and the sleeve 7, the sleeve 7 is fixedly connected to the front side 402 of the rear support plate and a transmission shaft 9 is provided therein, and the two ends of the transmission shaft 9 are respectively in contact with the slider 6 and a second pressure sensor 10, and the first pressure sensor 8 is pressed against the transmission shaft 9 with the slider 6 in a compressed state to make it slide in the sleeve 7, the pen core assembly 2 and the sleeve 7 are fixedly connected to the front side 402 of the rear support plate, and the image acquisition assembly 3 is fixedly connected to the back side 403 of the rear support plate. In this case, the pressure of the writing force on the pen core 2A is first transmitted to the first pressure sensor 8 through the pressure-bearing member 5, and then further transmitted to the second pressure sensor 10 through the slider 6 and the transmission shaft 9, so that the control chip on the circuit board of the smart pen can obtain the pressure measurement value of each pressure sensor, and then calculate and obtain various parameters of the handwriting to realize digital collection. In addition, since the pen core assembly 2 and the shaft sleeve 7 are fixed on the bracket 4 by clamping, the pen core assembly 2 that directly and indirectly cooperates with the pressure-bearing member 5 and the slider 6 and the shaft sleeve 7 that cooperates with the transmission shaft 9 can be reliably and firmly assembled on the bracket 4, thereby avoiding the situation that the movement of the slider 6 or / and the transmission shaft 9 is offset due to the poor assembly of the pen core assembly 2 or / and the shaft sleeve 7, thereby reducing the accuracy of the pressure sensor measurement, thereby ensuring the high quality of the digital collection of the smart pen.Moreover, the image acquisition component 3 is installed on the reverse side 403 of the rear support plate, which is opposite to the front side 402 of the rear support plate, by means of snap fixation. This not only simplifies the installation but also achieves high fixing stability. It also makes full use of the limited space inside the smart pen, making the internal structure layout compact, which can improve the user experience and reduce the product cost.

[0030] Further referring to Figure 4 、 Figure 9 and Figure 10 Specifically, a pair of positioning ribs 408 are provided on two opposite inner surfaces of the first auxiliary support plate 404, and a pair of positioning grooves 71 for snap fixation with the pair of positioning ribs 408 are provided on the sleeve 7. In this way, by using the mutual insertion of the pair of positioning ribs 408 and the pair of positioning grooves 71 for snap fixation, it is convenient to realize the interference fit assembly of the sleeve 77, and it has high assembly reliability. The pair of positioning ribs 408 are symmetrically arranged with respect to the pen center line of the refill 2A, and the pen center line and the central axis of the transmission shaft 9 are located on the same straight line. Therefore, the pair of positioning ribs 408 can play a good axial limiting and fixing role on the sleeve 7 especially in the axial direction of the transmission shaft 9 moving along the pen tube 1.

[0031] Further referring to Figure 11 and Figure 12 Specifically, on the surfaces of the slider 6 and the sleeve 7 facing each other, a counterbore 61 and a shoulder 72 for mutual insertion and cooperation are respectively provided. An axial through hole 73 for the relative movement of the transmission shaft 9 is provided in the shoulder 72. Thus, through the insertion and cooperation of the counterbore 61 and the shoulder 72, it can play a good limiting role in the cooperation between the slider 6 and the sleeve 7, and make the transmission shaft 9 move relative to the axial through hole 73 with the same central axis. The slider 6 is also provided with a shaft hole 62 communicating with the counterbore 61 and aligned with the axial through hole 73. On the inner hole surface of the shaft hole 62, a plurality of positioning ribs 63 are arranged evenly in the radial direction. Each positioning rib 63 abuts against the outer peripheral surface of the transmission shaft 9. Through the stable axial insertion and cooperation of the end of the transmission shaft 9 inserted into the slider 6 with the positioning ribs 63, the axial acting force from the slider 6 can be accurately transmitted to the second sensor through the relative movement with respect to the axial through hole 73 in a timely manner.

[0032] Referring to Figure 2, specifically, the refill assembly 2 includes a refill 2A having a nib 2B and a hollow core sleeve 2C sleeved on the outer periphery of the refill 2A and used for transmitting the force received by the nib 2B. The core sleeve 2C is made of a metal material. The front surface 402 of the rear support plate and the first auxiliary support plate 404 and the second auxiliary support plate 405 connected to and facing each other jointly form a circumferential surface that fits and supports the outer periphery of the core sleeve 2C. An arc plate 409 that sleeves the outer periphery of the core sleeve 2C is also connected between the first auxiliary support plate 404 and the second auxiliary support plate 405. The arc plate 409 can apply a radial force to the outer periphery of the core sleeve 2C to prevent accidental radial displacement of the refill assembly 2. The pressure member 5 is fixedly connected to one end of the core sleeve 2C away from the nib 2B. Elastic claws 410 for radially limiting the pressure member 5 are respectively provided on the first auxiliary support plate 404 and the second auxiliary support plate 405. The pair of elastic claws 410 face each other and can play a good role in installing and radially limiting the pressure member 5.

[0033] Further refer to Figure 5 and Figure 8 , specifically, a pair of first buckles 411 protrude from the front support plate 401. The image acquisition assembly 3 includes a housing 31 provided with a pair of through slots 32 for the pair of first buckles 411 to pass through correspondingly. In the housing 31, a filter 33, a lens cap 34, a lens module 35, an image sensor, etc. possessed by the image acquisition assembly 3 can be accommodated. Each of the first buckles 411 is respectively clamped on a top surface where the corresponding through slot 32 extends. In this way, by using the pair of first buckles 411 to pass through the pair of through slots 32 respectively and be clamped on the housing 31, a clamping force that presses against the back surface 403 of the rear support plate is applied to the housing 31, so that the elastic insertion is firmly fixed on the bracket 4.

[0034] Further refer to Figure 8 and Figure 10 , specifically, the bracket 4 includes a triangular wedge-shaped protrusion 412 provided with the above-mentioned first opening 406 and the above-mentioned second opening 407. An inner groove surrounded by an upper border 413 and side border surfaces 414 located at both ends of the upper border 413 and spaced parallel to each other is provided on one side of the triangular wedge-shaped protrusion 412 facing the front support plate 401. The front end of the housing 31 is inserted into the inner groove. Since the inner groove can accommodate and fix the front end of the housing 31, the image acquisition assembly 3 is further stably fixed.

[0035] Further refer to Figure 5 , Figure 8 and Figure 13, Preferably, the smart pen further includes a shell cover 11 disposed outside the accommodation shell 31. The upper peripheral edge 413 and each side peripheral edge surface 414 are provided with a plurality of first inclined surfaces. The cover end surface 112 of the shell cover 11 facing the triangular wedge-shaped protrusion 412 is provided with a plurality of second inclined surfaces that are adapted to the shapes of the respective first inclined surfaces and are in mutual abutment. In this way, by the matching abutment of the first inclined surfaces and the second inclined surfaces, the installation position of the shell cover 11 on the bracket 4 is ensured to be accurate, and further, the fixing position of the image acquisition assembly 3 on the bracket 4 is ensured to be accurate. A pair of second buckles 111 are provided on the shell cover 11 on both sides of the accommodation shell 31, and a pair of card slots 415 that are engaged with the pair of second buckles 111 are provided on the second sub-support plate 405. In this way, through the engagement cooperation of each pair of second buckles 111 and the card slots 415, the shell cover 11 can apply a clamping force against the back surface 403 of the rear support plate to the accommodation shell 31, thereby further increasing the applied force for firmly fixing the accommodation shell 31 on the bracket 4. Therefore, the cover shell can play a role in protecting and strengthening the fixation of the accommodation shell 31.

[0036] Further refer to Figure 8 and Figure 9 , Preferably, the two side surfaces of the accommodation shell 31 are respectively abutted against the first sub-support plate 404 and the second sub-support plate 405 facing each other. In this way, the two side surfaces of the accommodation shell 31 are simultaneously subjected to two opposite pressing forces in the radial direction perpendicular to the axial direction of the pen tube 1, ensuring the accurate positioning of the accommodation shell 31 in the radial direction of the pen tube 1 in the bracket 4. Combined with the accurate positioning of the accommodation shell 31 in the axial direction of the pen tube 1 in the bracket 4 by the inner groove, the accurate positioning of the accommodation shell 31 in multiple directions on the bracket 4 is achieved. The two side shell plates of the shell cover 11 are respectively pressed and supported on the first sub-support plate 404 and the second sub-support plate 405 facing each other. In this way, the cover shell not only obtains sufficient support force but also is reliably positioned in the relative position on the bracket 4.

[0037] Further refer to Figures 5 to 7, Preferably, the smart pen further includes a battery 12, a first PCB board 13 and a second PCB board 14. A pen cap 18 is fixed to the second end of the pen tube 1 opposite to the first end. The first PCB board 13 and the second PCB board 14 are at least partially located inside the pen cap 18. Thus, by using a certain space inside the pen cap 18 to accommodate the first PCB board 13 and the second PCB board 14, it is possible to help reduce the length of the smart pen, thereby facilitating writing and carrying. A first PCB board 13 and a second PCB board 14 are respectively fixed on the front surface 402 and the back surface 403 of the rear support plate. It can be known that the first PCB board 13 and the second PCB board 14 are arranged in parallel inside the smart pen. The first PCB board 13 and the second PCB board 14 are electrically connected by a flexible circuit board 17, i.e., FPC, located on the sides of both. Thus, by arranging the two circuit boards on the opposite side surfaces of the bracket 4, the circuit boards are installed in a stacked manner to make full use of the internal space of the smart pen to achieve a compact internal structure layout, which is convenient for the user to grip and carry and also makes the assembly simple and convenient.

[0038] Preferably, the smart pen further includes a second flexible circuit board 15 or a third PCB board arranged under the battery 12. In the present utility model, the second flexible circuit board 15 is used and arranged under the battery 12. One end of the second flexible circuit board 13 or the third PCB board is electrically connected to the image acquisition component 3, and the other end preferably passes between the two clamping blocks 421 and is electrically connected to the second flexible circuit board 15. In this way, since the second flexible circuit board 15 or the third PCB board is arranged under the battery 12, the vacant space existing in the battery 12 support structure can be utilized. Thus, when the second flexible circuit board 15 or the third PCB board is arranged, the volume of the smart pen will not be additionally increased. In addition, a recess 423 can be provided on the back surface 403 of the rear support plate. The second flexible circuit board 13 is arranged in the recess 423. Since the recess 423 can accommodate the second flexible circuit board 13 for limiting, the second flexible circuit board 13 is accurately and stably installed.

[0039] Further referring to Figure 9 , Preferably, a first through hole 416 facing the shaft sleeve 7 and a second through hole 417 facing the image acquisition component 3 and the pen tip component 2 are sequentially provided on the front support plate 401 along the axial direction of the pen tube 1. Thus, by using small tools such as a small screwdriver with a pointed tip to respectively pass through the first through hole 416 and the second through hole 417 and then correspondingly push the shaft sleeve 7 and the image acquisition component 3 and the pen tip component 2 to disengage from the corresponding snap-fixation, it is possible to conveniently disassemble or replace the shaft sleeve 7, the image acquisition component 3 and the pen tip component 2.

[0040] Further referring to Figure 11, Optionally, a boss 64 extending along the pen center line of the refill 2A and having a horizontal surface is provided on the bottom surface of the slider 6 facing the front support plate 401. The boss 64 is located at the center position of the bottom surface of the slider 6 in the direction perpendicular to the pen center line, and glue-reducing grooves 65 are provided on both sides of the boss 64 and the parts on both sides of it. The bottom surface of the bushing 7 facing the front support plate 401 is set as an integral plane. Therefore, the slider 6 slides on the front support plate 401 only by using one boss 64, which can minimize the friction force to the greatest extent, improve the sensitivity of the slider 6 to transmit force, and the arrangement of multiple glue-reducing grooves 65 can reduce the weight of the slider 6, thus further helping to reduce the friction force and also reducing the cost of the slider 6. Moreover, since the bottom surface of the bushing 7 is set as an integral plane, it can ensure the proper assembly of the bushing 7 and obtain a planar support force.

[0041] Further referring to Figure 1 , Figure 3 , Figure 4 , Figure 14 and Figure 15 , Optionally, the intelligent pen of the present invention may further include a button 19 having a light guide member 192. A bracket 4 fixing the first PCB board 13 is arranged inside the hollow pen tube 1 and the pen cap 18. A light source 20 for emitting an indication light and a button 21 for receiving the pressing force of the button body 191 are provided on the first PCB board 13. Since the button 19 integrates the two functions of pressing and light guiding and reduces the occupied volume, the intelligent pen can be correspondingly shortened and thinned. Moreover, a pair of elastic buckles 191D opposite to each other in the axial direction of the pen tube 1 are provided on the button body 191, and a pair of card holes (not shown) for being clamped and fixed with the pair of elastic buckles 191D are provided in the pen cap 16. In this way, the installation of the button 19 in the axial direction of the pen tube 1 is facilitated.

[0042] Further optionally, the above button 19 includes a button body 191 provided with an installation hole 191A and a light guide member 192 fixed on the back surface of the button body 191 facing away from the outside. The light guide member 192 is provided with a light-transmitting part 192A and a light guiding part 192B. The light-transmitting part 192A is arranged in the installation hole 191A, and the light guiding part 192B receives and guides the indication light to be emitted through the light-transmitting part 192A. Therefore, since the button 19 is set as an integrally assembled light guide member 192 and button body 191, the technical problem of the large total occupied space caused by the separation of the light guide member 192 and the button 19 and the remote installation in the prior art can be solved, which helps to make the intelligent pen relatively short and thin, facilitating the user's grasping and carrying during writing, and bringing a good use experience to the user.

[0043] Further optionally, a recessed portion 191B is provided on the back surface of the key body 191, and a "king" - shaped pressing convex column 191C is provided in the middle of the recessed portion 191B. In this way, the pressing convex column 191C is arranged in the recessed portion 191B, which helps to further reduce the volume of the key 19, and can also apply a uniform pressing force to the button 21 through the pressing convex column 191C, improving the pressing sensitivity and comfort.

[0044] Further optionally, the light - guiding member 192 is snap - fitted in the recessed portion 191B and is provided with a "king" - shaped empty slot 192C that is inserted and matched with the pressing convex column 191C. Therefore, through the insertion and matching of the "king" - shaped empty slot 192C and the pressing convex column 191C, the reliable fixation of the key body 191 and the light - guiding member 192 can be realized.

[0045] Further optionally, the light - guiding member 192 is provided with a first buckling block 192D and a second buckling block 192E adjacent to both ends of the empty slot 192C respectively. The first buckling block 192D and the second buckling block 192E are respectively buckled with the two free ends of the pressing convex column 191C, and the light - guiding portion 192B is disposed through the first buckling block 192D. Therefore, by using the two buckling blocks to be respectively buckled with the pressing convex column 191C, the light - guiding member 192 and the key body 191 are firmly assembled together. Since the light - guiding portion 192B is disposed through the first buckling block 192D, especially they can be integrally formed, so as to realize the alignment and positioning of the light - guiding portion 192B and the light - transmitting portion 192A with the mounting hole 191A while achieving the assembly.

[0046] Further optionally, the surface of the light - guiding portion 192B is provided with a concave spherical shape, a polygonal pyramid shape or a polygonal prism shape. In this embodiment, the surface of the light - guiding portion 192B has a concave spherical shape. Since the light - guiding portion 192B is set to have three different surfaces, all of which can play a role in converging the indicating light emitted by the light source 20 located, for example, at the focal position, they can all converge the indicating light well.

[0047] Further optionally, the light - guiding member 192 is integrally formed and made of a light - transmitting material. In this way, it is beneficial to simplify the production of the light - guiding member 192 and reduce costs, and can also improve the transmission ability of the indicating light.

[0048] Further reference Figure 7, Optionally, the first PCB board 13 and the second PCB board 14 are respectively provided with a first board groove 131 and a second board groove 141. The bracket 4 is provided with a wiring groove 418, and each board groove communicates with the wiring groove 418. The flexible circuit board 17 passes through each board groove and the wiring groove 418 to electrically connect the first PCB board 13 and the second PCB board 14. In this way, since the first board groove 131, the second board groove 141 and the wiring groove 418 provide space for the bending of the flexible circuit board 17, the assembly of the flexible circuit board 17 is facilitated.

[0049] Further referring to Figure 2 and Figure 7 , Optionally, an interface 22 protruding from the reverse side 403 of the rear support plate is also penetrated through the front support plate 401. The interface 22 can specifically be a Type-C interface or a USB interface. The fixed end of the interface 22 is electrically connected to the first PCB board 13. The external connection end of the interface 22 faces the outside through a through hole of the pen cap 18. The interface 22 is adjacent to the end of the second PCB board 14. In the embodiment of the present invention, the interface 22 adopted is a Type-C interface with a relatively large volume. Therefore, by passing the interface 22 through the reverse side 403 and the front side 402 of the rear support plate in sequence to be electrically connected to the first PCB board 13, it helps to reduce the space occupied by the interface 22 in the direction perpendicular to the support plate, and further reduces the thickness of the smart pen.

[0050] Further referring to Figure 8 and Figure 9 , Optionally, a plug post 419 protrudes from the front side 402 of the rear support plate at a position away from the free end of the pen core assembly 2 in the axial direction of the pen tube 1. A first protruding post 420 with a first threaded hole is provided at a position of the front side 402 of the rear support plate located inside the pen tube 1. The insertion hole at one end of the first PCB board 13 is clamped in the plug post 419 and the other end is supported by the first protruding post 420. A threaded member passes through a first board hole of the first PCB board 13 and is fixedly connected to the first threaded hole. In this way, for the relatively short first PCB board 13, the plug post 419 and the first protruding post 420 are used to respectively support and limit and fixedly connect by threading, and the effect of stably fixing the first PCB board 13 can be achieved.

[0051] Further optionally, two pairs of clamping blocks 421 protruding from the reverse side 403 of the rear support plate are opposite to each other in the axial direction of the pen tube 1 and spaced from each other in the direction perpendicular to the axial direction of the pen tube 1. A pair of second board holes are provided on both sides of the second PCB board 14. A pair of second protrusions 422 corresponding to the pair of second board holes and each having a second threaded hole are provided on the reverse side 403 of the rear support plate. Two threaded members such as screws and studs respectively pass through the two second board holes and are fixedly connected to the second threaded holes. Since the relatively long second PCB board 14 is clamped by the two pairs of clamping blocks 421 and the threaded members are threadedly connected to the second protrusions 422, the reliable positioning and fixing of the second PCB board 14 can be achieved.

[0052] It should be supplemented and explained that: the above-mentioned first pressure sensor 8 is used to detect the pressure acting on the pressure-receiving member 5, and the pressure-receiving member 5 and the first pressure sensor 8 can be formed in a separable manner for transmission connection. The first pressure sensor 8 can adopt a thin-film resistive strain type pressure sensor. The "pressure-resistance" curve of this sensor has a large dynamic range. After the change of the resistance is converted into a voltage signal, it can be directly used as a power-on wake-up signal without amplification, supports the function of automatically powering on when writing, and can also be directly used for AD sampling and digitization. The above-mentioned second pressure sensor 10 is used to detect the magnitude of the pressure acting on the pressure-receiving member 5, and the second pressure sensor 10 can adopt a bridge type pressure sensor. On the one hand, the "pressure-resistance" curve of this sensor has good linearity and can well distinguish the subtle changes of the writing pressure. On the other hand, it has good repeatability, that is, after releasing the pressure and then applying the same pressure, measuring the resistance repeatedly, the variance of the resistance value is small. Using this type of sensor can achieve the effect of good consistency in the thickness of the strokes presented under the same writing force.

[0053] In addition, the intelligent pen of the present invention may further include a controller electrically connected to the first pressure sensor 8 and the second pressure sensor 10 respectively. When the pen core assembly is pressed by the force during writing, the pressed member 5 is brought into contact with the first pressure sensor 8, enabling the first pressure sensor 8 to detect the pressure change in a timely manner, so that the electrical signals of the first sensor 8 can be processed and collected. At the same time, the pressure can be transmitted to the second pressure sensor 10 in a timely manner, and then the magnitude of the pressure to be detected can be accurately measured in a timely manner according to the signals detected by the second pressure sensor 10. The controller receives the electrical signals of the first pressure sensor 8. Since the first pressure sensor 8 is a pressure sensor with a large dynamic range of the "pressure-resistance" curve, the voltage signal of the first pressure sensor 8 can be directly sent to the controller without amplification. The controller controls the startup and wake-up of related devices according to the voltage signal of the first pressure sensor 8, and can also control whether to process and collect the electrical signals of the second pressure sensor 10 according to the voltage signal of the first pressure sensor 8. Due to the cooperative working mode of the first pressure sensor 8 and the second pressure sensor 10, by using the pressure change detected by the first pressure sensor 8 with low energy consumption to control the working mode of the pressure detection device of the intelligent pen, the pressure detection device only uses the second pressure sensor 10 with high detection accuracy and good repeatability to accurately obtain the pressure value to be detected when the set conditions are met, and only uses the first pressure sensor 8 to detect the pressure change when the conditions are not met. In this way, not only the power consumption of the pressure detection device is greatly reduced, but also the detection accuracy of the pressure detection device is significantly improved.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A structurally compact smart pen, characterized in that, include: A hollow pen tube, which is formed with a receiving space for receiving the pen core component and the image acquisition component; A bracket, which is arranged in the pen tube in an axial direction of the pen tube, the bracket is in an elongated strip shape and has a front support plate, two opposite sides of the front support plate are respectively provided with a front side of a rear support plate and a back side of the rear support plate, and two side edges of the front side of the rear support plate and the back side of the rear support plate are respectively provided with a pair of first auxiliary support plates and a pair of second auxiliary support plates extending away from each other; The first end of the bracket is provided with a first opening for the pen tip of the pen core assembly to extend out of the pen tube and a second opening for external light to enter the image acquisition assembly; A pressure-bearing member, a slider and a sleeve are sequentially arranged on the front side of the rear support plate in a direction away from the pen tip of the pen core assembly, and the pressure-bearing member is fixedly connected to a free end of the pen core assembly opposite to the pen tip; A first pressure sensor is arranged between the slider and the sleeve, a transmission shaft is arranged in the sleeve, and two ends of the transmission shaft are respectively in contact with the slider and a second pressure sensor; the first pressure sensor presses the transmission shaft with the slider under pressure to make it slide in the sleeve; The pen core assembly and the shaft sleeve are clamped and fixed on the front surface of the rear support plate, and the image acquisition assembly is clamped and fixed on the back surface of the rear support plate.

2. The compact smart pen according to claim 1, characterized in that, A pair of positioning ribs are provided on the two opposite inner surfaces of the first auxiliary support plate, and a pair of positioning grooves are provided on the shaft sleeve to be clamped and fixed with the pair of positioning ribs. The pair of positioning ribs are symmetrically arranged relative to the pen center line of the pen core, and the pen center line and the central axis of the transmission shaft are located on the same straight line.

3. The compact smart pen according to claim 1, characterized in that, The surfaces of the slider and the sleeve that are opposite to each other are respectively provided with a countersunk platform and a shoulder that are plugged into each other. The shoulder is provided with an axial through hole for the transmission shaft to move relatively therein. The slider is also provided with an axial hole that is connected to the countersunk platform and aligned with the axial through hole. A plurality of radially evenly arranged positioning ribs are provided on the inner hole surface of the axial hole, and each of the positioning ribs is pressed and plugged into the outer circumferential surface of the transmission shaft.

4. The compact smart pen according to claim 1, characterized in that, The refill assembly includes a refill with a pen tip and a hollow core sleeve that is sleeved on the outer circumference of the refill and is used to transfer the force acting on the pen tip. The front side of the rear support plate and the first auxiliary support plate and the second auxiliary support plate that are connected to it and face each other jointly form a circumferential surface that fits and supports the outer circumference of the core sleeve, and a circular arc plate that clamps the outer circumference of the core sleeve is also connected between the first auxiliary support plate and the second auxiliary support plate. The pressure-bearing piece is fixedly connected to one end of the core sleeve away from the pen tip, and an elastic claw for radially limiting the pressure-bearing piece is respectively provided on the first auxiliary support plate and the second auxiliary support plate.

5. The compact smart pen according to claim 1, characterized in that, A pair of first buckles are protruding from the front support plate, and the image acquisition component includes a accommodating shell provided with a pair of through slots for the pair of first buckles to pass through respectively, and each of the first buckles is respectively clamped on a top surface extending from the corresponding through slot.

6. The compact smart pen according to claim 5, characterized in that, The bracket includes a triangular wedge-shaped protrusion having the first opening and the second opening. An inner groove surrounded by an upper border and side border surfaces located at both ends of the upper border and spaced parallel to each other is provided on a side of the triangular wedge-shaped protrusion facing the front support plate. A front end portion of the accommodation shell is inserted into the inner groove.

7. The compact smart pen according to claim 6, characterized in that, The smart pen further includes a shell cover arranged outside the accommodation shell. A plurality of first inclined surfaces are provided on the upper border and each of the side border surfaces. A cover end surface of the shell cover facing the triangular wedge-shaped protrusion is provided with a plurality of second inclined surfaces that are adapted in shape to and in abutment with each of the first inclined surfaces. A pair of second buckles located on both sides of the accommodation shell are provided on the shell cover. A pair of card slots adapted to be engaged with the pair of second buckles are provided on the second sub-support plate.

8. The compact smart pen according to claim 7, characterized in that, Both side surfaces of the accommodation shell are respectively in abutment with the first sub-support plate and the second sub-support plate facing each other. Both side plates of the shell cover are respectively pressed and supported on the first sub-support plate and the second sub-support plate facing each other.

9. The compact smart pen according to claim 1, characterized in that, The smart pen further includes a battery, a first PCB board, and a second PCB board. A pen cap is fixed to a second end of the pen tube opposite to the first end. At least part of the first PCB board and the second PCB board are located inside the pen cap. The first PCB board and the second PCB board are respectively fixed on a front surface and a back surface of the rear support plate. The first PCB board and the second PCB board are electrically connected by a first flexible circuit board located on a side portion of both of them.

10. The compact smart pen according to claim 1, characterized in that, A first through hole facing the shaft sleeve and a second through hole facing the image acquisition component and the pen core component are sequentially provided on the front support plate along the axial direction of the pen tube.

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