An electromagnetic signature device
By using a servo motor-driven cord winding mechanism and a sliding protective shell, the problems of unsuitable cord length and screen dirtiness of the electromagnetic pen are solved, improving the user experience of the signature device and the cleanliness of the screen.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN HUAXUN TECHNOLOGY CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-02
AI Technical Summary
The existing electromagnetic pen lanyard length is unsuitable, affecting the writing experience, and the signature device screen is prone to getting dirty, affecting the usability.
An electromagnetic signature device was designed, which uses a servo motor-driven winding mechanism and a sliding protective shell to achieve automatic adjustment of the pen's string length and screen cleaning.
It improves the writing experience with pens, prevents pens from being lost, keeps the screen clean, and enhances the device's tidiness and display quality.
Smart Images

Figure CN224318014U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic signature technology, specifically to an electromagnetic signature device. Background Technology
[0002] Electronic signature devices have great potential applications in the financial, mobile communication, and paperless office sectors. Currently, various electronic signature devices on the market are gradually becoming more popular as an auxiliary method of real-name authentication. The most commonly used electronic products are resistive, capacitive, and electromagnetic screens. Electromagnetic screens are usually used in conjunction with electromagnetic pens to achieve high-precision handwriting input, drawing, or signature operations.
[0003] In existing technologies, to prevent the electromagnetic pen from being lost, it is connected to the electronic signature via a lanyard. If the lanyard is too short, it will affect the user's signature writing experience. If the lanyard is too long, it will be scattered on the table or the ground, taking up extra space and affecting the cleanliness of the surroundings. Furthermore, after a period of use, the signature device will have smudges on the screen, which will require regular cleaning by the user. Otherwise, it will affect the viewing effect of the screen. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides an electromagnetic signature device that solves the problems mentioned in the background section.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: an electromagnetic signature device, comprising a signature device body and a pen, wherein a placement groove is provided on the top of the signature device body, sliding grooves are provided at both the front and rear ends of the signature device body, and limiting grooves are provided at both the front and rear ends of the signature device body, a connecting frame is fixedly installed on one side of the signature device body, an installation groove is provided on the top of the connecting frame, a servo motor is fixedly installed on one side of the outer wall of the connecting frame, an installation shaft is fixedly connected to the output end of the servo motor, a protective shell is slidably installed on the surface of the signature device body, a take-up drum is rotatably installed on the surface of the installation shaft, a through hole is provided inside the take-up drum, a rope is wound on the surface of the take-up drum, one end of the rope is fixedly connected to one end of the pen, a push plate is installed inside the through hole, two positioning plates are fixedly connected to the surface of the installation shaft, and a hollow block is fixedly installed on the surface of the installation shaft.
[0006] Preferably, the mounting shaft is rotatably mounted inside the mounting groove, and both positioning plates are rotatably mounted inside the through hole, with the two positioning plates located on opposite sides of the hollow block.
[0007] Preferably, the number of push plates is four, and the positions of the push plates are aligned with the positions of the hollow blocks.
[0008] Preferably, the hollow block has a storage groove inside, and a slider is slidably installed inside the storage groove, with the top of the slider extending upward to the outside of the hollow block.
[0009] Preferably, the storage groove has four rotatably mounted ball bearings on its interior sides, and the slider has grooves on all four sides, with one end of each ball bearing abutting against the inside of the groove.
[0010] Preferably, a sliding plate is fixedly connected to both sides of the inner wall of the protective shell, and the sliding plate is slidably installed inside the sliding groove. A limiting block is fixedly connected to both sides of the inner wall of the protective shell, and the limiting block is slidably installed inside the limiting groove.
[0011] Preferably, the top of the inner wall of the protective shell is fixedly connected with Velcro, and the bottom of the Velcro is adhesively connected with a cleaning cloth.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. In this utility model, the pen is connected to a cord at one end to prevent it from falling or being lost during use. The cord reel is rotated on the surface of the mounting shaft, so that pulling the pen outward increases the cord length, making it easier for people to write and sign. When the mounting shaft is rotated by the servo motor, the slider is extended outward by centrifugal force. The slider pushes the push plate, which drives the cord reel to rotate in the opposite direction, thereby winding up the excessively long cord and preventing the cord from being too long or too short, which would affect the writing experience of the pen.
[0014] 2. In this utility model, a protective shell is slidably installed on the surface of the main body of the signing device. When idle, the protective shell is pushed to cover the surface of the main body of the signing device for protection, avoiding the screen from being exposed to the outside for a long time and adhering to dust and other foreign objects. At the same time, it can prevent the screen from breaking when the main body of the signing device is dropped from a height. The cleaning cloth installed on the inside of the protective shell can wipe and clean the screen when sliding, thereby improving the screen display effect of the main body of the signing device. Attached Figure Description
[0015] Figure 1 This utility model provides a three-dimensional structural diagram of the main body of an electromagnetic signature device;
[0016] Figure 2 This utility model provides a schematic diagram of the winding drum installation structure for an electromagnetic signature device;
[0017] Figure 3 This utility model provides a schematic diagram of the cross-sectional structure of the take-up tube of an electromagnetic signature device;
[0018] Figure 4 This utility model provides a schematic diagram of the hollow block mounting structure for an electromagnetic signature device;
[0019] Figure 5 This utility model provides a schematic diagram of the slider disassembly structure of an electromagnetic signature device;
[0020] Figure 6 This utility model provides a schematic diagram of the disassembly and assembly structure of the protective shell for an electromagnetic signature device.
[0021] In the diagram: 1. Signature device body; 101. Placement slot; 102. Slide groove; 103. Limiting slot; 2. Signature pen; 3. Connecting frame; 301. Mounting slot; 31. Servo motor; 32. Mounting shaft; 33. Positioning plate; 4. Protective shell; 41. Slide plate; 42. Limiting block; 43. Velcro; 44. Cleaning cloth; 5. Cable reel; 501. Through hole; 51. Cable; 52. Push plate; 6. Hollow block; 601. Storage slot; 61. Slider; 611. Groove; 62. Ball bearing. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Example 1
[0024] like Figures 1-6As shown, this utility model provides a technical solution: an electromagnetic signature device, including a signature device body 1 and a pen 2. The top of the signature device body 1 has a placement groove 101, and both the front and rear ends of the signature device body 1 have sliding grooves 102. Both the front and rear ends of the signature device body 1 have limiting grooves 103. A connecting frame 3 is fixedly installed on one side of the signature device body 1. The top of the connecting frame 3 has an installation groove 301. A servo motor 31 is fixedly installed on one side of the outer wall of the connecting frame 3. The output end of the servo motor 31 is fixedly connected to an installation shaft 32. A protective shell 4 is slidably installed on the surface of the signature device body 1. A take-up drum 5 is rotatably installed on the surface of the installation shaft 32. The inside of the take-up drum 5 has a through hole 501. A rope 51 is wound around the surface of the take-up drum 5. One end of the rope 51 is connected to one end of the pen 2. The mounting shaft 32 is fixedly connected to a through hole 501. Two positioning plates 33 are fixedly connected to the surface of the mounting shaft 32. A hollow block 6 is fixedly installed on the surface of the mounting shaft 32. The mounting shaft 32 is rotatably installed inside the mounting groove 301. The two positioning plates 33 are rotatably installed inside the through hole 501. The two positioning plates 33 are located on both sides of the hollow block 6. There are four push plates 52. The position of the push plates 52 is aligned with the position of the hollow block 6. A storage groove 601 is opened inside the hollow block 6. A slider 61 is slidably installed inside the storage groove 601. The top of the slider 61 extends upward to the outside of the hollow block 6. Ball bearings 62 are rotatably installed on the four sides of the storage groove 601. Grooves 611 are opened on the four sides of the slider 61. One end of the ball bearing 62 abuts against the inside of the groove 611.
[0025] In this embodiment, the placement slot 101 facilitates the placement and storage of the pen 2. The cord 51 connected to the pen 2 prevents it from being lost, while the other end of the cord 51 is wrapped around the surface of the take-up reel 5. The rotation of the take-up reel 5 allows for control and adjustment of the cord 51's length. The positioning plate 33, installed inside the through hole 501, fixes the position of the take-up reel 5, preventing it from moving. Simultaneously, the positioning plate 33 is rotatably connected to the inner wall of the through hole 501, allowing the take-up reel 5 to rotate while the mounting shaft 32 is fixed. The hollow block 6 is slidably positioned to move into the storage slot 601 for winding. The slider 61 is compressed to prevent it from protruding upwards and limiting the push plate 52, thus preventing the take-up drum 5 from rotating. One end of the ball bearing 62 abuts against the inside of the groove 611, which can reduce the friction between the slider 61 and the hollow block 6, so that the slider 61 can slide down on its own when the hollow block 6 is in a vertical state. One end of the servo motor 31 is connected to the mounting shaft 32, so that when the servo motor 31 drives the mounting shaft 32 to rotate, the hollow block 6 can rotate with it. The slider 61 is moved outward by centrifugal force and can abut against the side of the push plate 52, so that the mounting shaft 32 can push the take-up drum 5 to rotate, thereby winding up the excessively long rope 51.
[0026] Example 2
[0027] like Figures 1-6 As shown, a sliding plate 41 is fixedly connected to both sides of the inner wall of the protective shell 4. The sliding plate 41 is slidably installed inside the slide groove 102. A limiting block 42 is fixedly connected to both sides of the inner wall of the protective shell 4. The limiting block 42 is slidably installed inside the limiting groove 103. A Velcro 43 is fixedly connected to the top of the inner wall of the protective shell 4. A cleaning cloth 44 is glued to the bottom of the Velcro 43.
[0028] In this embodiment, the sliding plate 41 installed inside the sliding groove 102 allows the protective shell 4 to move horizontally. Moving the protective shell 4 to cover the surface of the signature device body 1 can protect the screen. The limiting block 42 installed inside the limiting groove 103 can limit the movement distance of the protective shell 4, preventing the protective shell 4 from falling off the surface of the signature device body 1. The cleaning cloth 44 provided on the inner side of the protective shell 4 abuts against the screen, so that the screen can be cleaned when the protective shell 4 is slidably used, removing stains and marks on the screen, thereby improving the display and viewing effect of the screen. The top of the cleaning cloth 44 is provided with a rough surface, which can be used in conjunction with the hook surface at the bottom of the Velcro 43 to facilitate the adhesion and fixation of the cleaning cloth 44, and at the same time facilitate the disassembly and cleaning of the cleaning cloth 44 later.
[0029] Working principle: When the main body of the signature device 1 is idle, the protective shell 4 slides to cover its surface, protecting the screen. The pen 2 is stored inside the placement slot 101. When the main body of the signature device 1 needs to be used, the protective shell 4 is pushed from one side to move it for signing. At the same time, the cleaning cloth 44 brushes and cleans the screen surface, improving the display effect of the screen of the main body of the signature device 1. The servo motor 31 controls the hollow block 6 on the surface of the mounting shaft 32 to be in a vertical state. The slider 61 slides into the storage slot 601 under gravity. At this time, the cord reel 5 is in an active state, pulling the pen 2 outward to make the cord 51 The winding drum 5 rotates, increasing the length of the cord 51 and improving the user experience of the pen 2. After use, the servo motor 31 drives the mounting shaft 32 to rotate, and the hollow block 6 rotates along with it, causing the slider 61 to move outward under centrifugal force. When the slider 61 rotates, it abuts against the side of the push plate 52. At the same time, the slider 61 is pushed by the push plate 52, so that the slider 61 cannot slip into the storage slot 601 when it rotates to a vertical position. The slider 61 pushes the push plate 52, causing the winding drum 5 to rotate in the opposite direction and wind up the cord 51. After signing, the cord 51 can be wound up to avoid it being too long and affecting the surrounding cleanliness.
[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An electromagnetic signature device, characterized by: The device includes a signature device body (1) and a pen (2). The top of the signature device body (1) has a placement groove (101), and both the front and rear ends of the signature device body (1) have sliding grooves (102). Both the front and rear ends of the signature device body (1) have limiting grooves (103). A connecting frame (3) is fixedly installed on one side of the signature device body (1). The top of the connecting frame (3) has an installation groove (301). A servo motor (31) is fixedly installed on one side of the outer wall of the connecting frame (3). The output end of the servo motor (31) is fixedly connected to an installation shaft. 32) A protective shell (4) is slidably installed on the surface of the main body (1) of the signature device. A take-up drum (5) is rotatably installed on the surface of the mounting shaft (32). A through hole (501) is opened inside the take-up drum (5). A rope (51) is wound on the surface of the take-up drum (5). One end of the rope (51) is fixedly connected to one end of the pen (2). A push plate (52) is installed inside the through hole (501). Two positioning plates (33) are fixedly connected to the surface of the mounting shaft (32). A hollow block (6) is fixedly installed on the surface of the mounting shaft (32).
2. An electromagnetic signature device according to claim 1, wherein: The mounting shaft (32) is rotatably mounted inside the mounting groove (301), and the two positioning plates (33) are rotatably mounted inside the through hole (501). The two positioning plates (33) are located on both sides of the hollow block (6).
3. An electromagnetic signature device according to claim 1, wherein: The number of push plates (52) is four, and the position of the push plates (52) is aligned with the position of the hollow block (6).
4. An electromagnetic signature device according to claim 1, wherein: The hollow block (6) has a storage groove (601) inside, and a slider (61) is slidably installed inside the storage groove (601). The top of the slider (61) extends upward to the outside of the hollow block (6).
5. An electromagnetic signature device according to claim 4, wherein: The storage slot (601) has four rotating balls (62) mounted inside. The slider (61) has grooves (611) on all four sides. One end of the ball (62) is abutted inside the groove (611).
6. An electromagnetic signature device according to claim 1, wherein: The protective shell (4) has a sliding plate (41) fixedly connected to both sides of its inner wall. The sliding plate (41) is slidably installed inside the slide groove (102). The protective shell (4) has a limiting block (42) fixedly connected to both sides of its inner wall. The limiting block (42) is slidably installed inside the limiting groove (103).
7. An electromagnetic signature device according to claim 1, wherein: The top of the inner wall of the protective shell (4) is fixedly connected with a Velcro (43), and a cleaning cloth (44) is glued to the bottom of the Velcro (43).