Scanning pen

Abstract

The invention belongs to the field of scanning equipment, and discloses a scanning pen which comprises a shell, a first roller assembly and a second roller assembly. The first roller assembly comprises a first rotating shaft, a first support and a first roller, the first support is rotationally connected with the shell through the first rotating shaft, and the first roller is arranged on the first support; the second roller assembly comprises a second rotating shaft, a second support and a second roller, the second support is rotationally connected with the shell through the second rotating shaft, and the second roller is arranged on the second support; when the first rolling wheel and the second rolling wheel are in contact with the scanned surface at the same time and the included angle between the center line of the shell and the scanned surface is a preset angle, the first rotating shaft and the second rotating shaft are perpendicular to or approximately perpendicular to the scanned surface, and the first rotating shaft deviates from the contact point of the first rolling wheel and the scanned surface. And the second rotating shaft deviates from the contact point of the second roller and the scanned surface. The scanning track can be corrected when the scanning track is skewed, and the scanning precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of scanning equipment, in particular to a scanning pen. Background Art

[0002] A scanning pen is a handheld electronic scanning device. Users can scan and enter text or images by holding the scanning pen. Through the built-in optical character recognition (OCR) module, text can be recognized, translated, stored and edited. It is widely used in scenarios such as student learning and travel translation.

[0003] There are two main types of scanning pens on the market. The first type is that the pen tip is a plastic bracket with two pen tip fulcrums. During use, the two pen tip fulcrums abut against the paper surface and slide relative to each other. The sliding friction causes greater resistance during use. In addition, due to the large width of the pen tip, the holding posture is different from the normal pen holding posture, and it is not easy to hold.

[0004] In order to improve the use defects of the first scanning pen, the second scanning pen adopts the design of tilted pen body + roller pen tip. Although this design can reduce resistance and allow users to hold the scanning pen in a normal pen holding posture, it improves the use experience of the scanning pen. However, due to the different holding postures of different users, or the change of holding posture during the scanning process, the scanning track will be skewed towards the roller direction during the scanning process, causing scanning errors. Summary of the invention

[0005] The purpose of the present invention is to provide a scanning pen, which can correct the scanning track when it is skewed, thereby improving the scanning accuracy and the user experience.

[0006] The technical solution provided by the present invention is as follows:

[0007] A scanning pen, comprising:

[0008] a housing having a scanning end and a centerline;

[0009] A first roller assembly, comprising a first rotating shaft, a first bracket and a first roller, wherein the first bracket is rotatably connected to the scanning end of the housing through the first rotating shaft, and the first roller is disposed on the first bracket;

[0010] A second roller assembly, comprising a second rotating shaft, a second bracket and a second roller, wherein the second bracket is rotatably connected to the scanning end of the housing via the second rotating shaft, and the second roller is disposed on the second bracket;

[0011] When the first roller and the second roller are in contact with the scanned surface at the same time and in the length direction of the scanned surface, the angle between the center line of the shell and the scanned surface is a preset angle, the first rotation axis and the second rotation axis are respectively perpendicular or approximately perpendicular to the scanned surface, when the first roller and the second roller are in contact with the scanned surface at the same time, the contact point of the first roller with the scanned surface is the first contact point, the contact point of the second roller with the scanned surface is the second contact point, the first rotation axis deviates from the first contact point, and the second rotation axis deviates from the second contact point.

[0012] In some embodiments, a first spacing is defined between a first perpendicular line perpendicular to the scanned surface and passing through the first contact point and a central axis of the first rotation axis. The first spacing is in a range of greater than 0 mm and less than or equal to 5 mm.

[0013] In some embodiments, a distance between a second perpendicular line perpendicular to the scanned surface and passing through the second contact point and a central axis of the second rotation axis is a second distance, and the range of the second distance is greater than 0 mm and less than or equal to 5 mm.

[0014] In some embodiments, the first spacing is equal to the second spacing.

[0015] In some embodiments, when the first roller and the second roller are in contact with the scanned surface at the same time, in the width direction of the scanned surface, an angle between a vertical line perpendicular to the scanned surface and a center line of the shell is greater than 0 degrees and less than 45 degrees.

[0016] In some embodiments, in the length direction of the scanned surface, an angle between a center line of the shell and the scanned surface is greater than or equal to 45 degrees and less than 90 degrees.

[0017] In some embodiments, the scanning end of the housing is provided with a first limiting structure for limiting the rotation angle of the first bracket and a second limiting structure for limiting the rotation angle of the second bracket.

[0018] In some embodiments, the scanning end of the shell is provided with a first mounting groove and a second mounting groove, the first rotating shaft and a portion of the first bracket are installed in the first mounting groove, and the second rotating shaft and a portion of the second bracket are installed in the second mounting groove.

[0019] In some embodiments, the first limiting structure is disposed in the first installation slot, the second limiting structure is disposed in the second installation slot, the first limiting structure and the second limiting structure both extend along the width direction of the housing, and both the first limiting structure and the second limiting structure are recessed portions;

[0020] The first bracket is provided with a first protrusion extending along the width direction of the shell, and the second bracket is provided with a second protrusion extending along the width direction of the shell;

[0021] The first protrusion is located in the first limiting structure, the extension length of the first limiting structure is greater than the extension length of the first protrusion, and the rotation angle of the first bracket is limited by the cooperation between the first protrusion and the first limiting structure;

[0022] The second protrusion is located in the second limiting structure, and the extension length of the second limiting structure is greater than the extension length of the second protrusion. The rotation angle of the second bracket is limited by the cooperation between the second protrusion and the second limiting structure.

[0023] In some embodiments, the rotation angle range of the first bracket is -30° to 30°; the rotation angle range of the second bracket is -30° to 30°.

[0024] In some embodiments, it also includes two first magnets and two second magnets, the two first magnets are respectively arranged on the shell, one second magnet is fixedly arranged on the first bracket and is arranged opposite to one first magnet, and the other second magnet is fixedly arranged on the second bracket and is arranged opposite to the other first magnet; after the first bracket rotates relative to the shell, the first bracket is returned to the center by the opposite attraction between the corresponding first magnet and the second magnet on the first bracket; after the second bracket rotates relative to the shell, the second bracket is returned to the center by the opposite attraction between the corresponding first magnet and the second magnet on the second bracket.

[0025] In some embodiments, the first magnet includes an N pole and an S pole, and the second magnet includes an N pole and an S pole;

[0026] When the first roller is at an angle of 0°, the N pole of the second magnet on the first bracket corresponds to the S pole of the corresponding first magnet, and the S pole of the second magnet on the first bracket corresponds to the N pole of the corresponding first magnet;

[0027] When the second roller is at an angle of 0°, the N pole of the second magnet on the second bracket corresponds to the S pole of the corresponding first magnet, and the S pole of the second magnet on the second bracket corresponds to the N pole of the corresponding first magnet.

[0028] In some embodiments, the first bracket includes a first connecting portion and two first fixing portions, the two first fixing portions are arranged opposite to each other, one end of the first connecting portion is connected to one of the first fixing portions, and the other end is connected to the other first fixing portion, the first rotating axis is connected to the first connecting portion, the first roller is arranged between the two first fixing portions and is rotatably connected to the two first fixing portions, and the rotating axis of the first roller is arranged perpendicular to the first rotating axis.

[0029] In some embodiments, the second bracket includes a second connecting portion and two second fixing portions, the two second fixing portions are arranged opposite to each other, one end of the second connecting portion is connected to one second fixing portion, and the other end is connected to another second fixing portion, the second rotating axis is connected to the second connecting portion, the second roller is arranged between the two second fixing portions and is rotatably connected to the two second fixing portions, and the rotating axis of the second roller is arranged perpendicular to the second rotating axis.

[0030] In some embodiments, a scanning assembly is further included, wherein the scanning assembly is disposed at a scanning end of the housing and is located between the first roller assembly and the second roller assembly.

[0031] The technical effect of the present invention is that by setting the first rotating axis and the second rotating axis, and the first rotating axis and the second rotating axis are eccentrically set, the first roller assembly and the second roller assembly can be rotated to correct the scanning trajectory, thereby reducing the situation where the scanning trajectory is skewed toward the roller direction due to different holding postures of the scanning pen or changes in holding posture during use, thereby improving scanning accuracy and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0033] Figure 1 This is a front view of a scanning pen provided in a specific embodiment of the present application;

[0034] Figure 2 It is a right side view of a scanning pen provided in a specific embodiment of the present application;

[0035] Figure 3 is a schematic diagram of a scanning pen provided by a specific embodiment of the present application when a line connecting a first contact point and a second contact point is vertically downward;

[0036] Figure 4 is a schematic diagram of a scanning pen provided in a specific embodiment of the present application when the line connecting the first contact point and the second contact point is not vertically downward;

[0037] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0038] Figure 6 It is a schematic diagram of the back structure of a scanning pen provided in a specific embodiment of the present application;

[0039] Figure 7 is a schematic structural diagram of a first roller assembly and a second roller assembly provided in a specific embodiment of the present application;

[0040] Figure 8 is a schematic diagram of the distance between the rotating shaft and the roller provided in a specific embodiment of the present application;

[0041] Fig. 9 It is a structural schematic diagram of a housing provided in a specific embodiment of the present application;

[0042] Fig.10 yes Fig. 9 The enlarged view of point B in the middle;

[0043] Fig.11 This is a schematic diagram of the structure of a scanning pen provided by a specific embodiment of the present application after the front shell of the housing is removed;

[0044] Fig.12 yes Fig.11 Enlarged view of point C in the middle;

[0045] Fig.13 It is a plan view schematic diagram of the first magnet and the second magnet provided in a specific embodiment of the present application.

[0046] Description of Figure Numbers:

[0047] 10. Shell; 101. Center line; 102. First mounting slot; 1021. First limiting structure; 103. Second mounting slot; 1031. Second limiting structure; 20. First roller assembly; 21. First rotating axis; 22. First bracket; 221. First connecting portion; 222. First fixing portion; 223. First protruding portion; 23. First roller; 30. Second roller assembly; 31. Second rotating axis; 32. Second bracket; 321. Second connecting portion; 322. Second fixing portion; 323. Second protruding portion; 33. Second roller; 40. Scanned surface; 41. First contact point; 42. Second contact point; 50. First magnet; 60. Second magnet; 70. Scanning assembly. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0050] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0051] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] In one embodiment of the present application, Figures 1 to 6As shown, a scanning pen includes a housing 10, a first roller assembly 20 and a second roller assembly 30, wherein the housing 10 has a scanning end and a center line 101; the first roller assembly 20 includes a first rotating shaft 21, a first bracket 22 and a first roller 23, wherein the first bracket 22 is rotatably connected to the scanning end of the housing 10 through the first rotating shaft 21, and the first roller 23 is disposed on the first bracket 22; the second roller assembly 30 includes a second rotating shaft 31, a second bracket 32 ​​and a second roller 33, wherein the second bracket 32 ​​is rotatably connected to the scanning end of the housing 10 through the second rotating shaft 31, and the second roller 33 is disposed on the second bracket 32; the first roller 23 and When the second roller 33 is in contact with the scanned surface 40 at the same time and in the length direction of the scanned surface 40, the angle between the center line 101 of the shell 10 and the scanned surface 40 is a preset angle, the first rotating axis 21 and the second rotating axis 31 are respectively perpendicular or approximately perpendicular to the scanned surface 40, and when the first roller 23 and the second roller 33 are in contact with the scanned surface 40 at the same time, the contact point of the first roller 23 and the scanned surface 40 is the first contact point 41, and the contact point of the second roller 33 and the scanned surface 40 is the second contact point 42, the first rotating axis 21 deviates from the first contact point 41, and the second rotating axis 31 deviates from the second contact point 42.

[0054] The scanning end of the housing 10 of this embodiment is located at the bottom of the housing 10. When the user uses the scanning pen, the fingers can hold the housing 10 around the center line 101 of the housing 10. The scanning component 70 is arranged at the scanning end of the housing 10 and is located between the first roller 23 and the second roller 33. During scanning, the first roller 23 and the second roller 33 located at the scanning end of the housing 10 contact the scanned surface 40, and then the scanning pen is moved, the first roller 23 and the second roller 33 roll on the scanned surface 40, and the scanning component 70 scans and recognizes the text or pattern on the scanned surface 40 to perform word translation, Chinese character word recognition, etc. The scanning pen rolls the first roller 23 and the second roller 33 on the scanned surface 40 to scan, which can reduce the friction resistance during the scanning process, make the scanning process smoother, and provide a better user experience.

[0055] like Figure 1 and Figure 2 As shown, for the inclined pen tip design, the pen body is inclined at two angles α and β respectively when in use, wherein α is the pen body inclination angle, and the pen body inclination angle α refers to the width direction ( Figure 1 and Figure 2The angle between the vertical line 101 of the housing 10 and the vertical line 202 of the scanning surface 40 is the angle between the vertical line 101 of the housing 10 and the vertical line 203 of the scanning surface 40. The angle between the vertical line 101 of the housing 10 and the vertical line 203 ...

[0056] β is the holding tilt angle of the scanning pen held by the user. The holding tilt angle β refers to the angle of the first roller 23 and the second roller 33 in the length direction of the scanning surface 40 ( Figure 1 and Figure 2 The angle between the center line 101 of the housing 10 and the scanned surface 40 is the direction indicated by the arrow a in the middle). The scanned surface 40 may be a surface such as a book or paper. The length direction of the scanned surface 40 is the direction in which the scanning pen moves when scanning the scanned surface 40. The width direction of the scanned surface 40 is perpendicular to the length direction of the scanned surface 40. The holding tilt angle β is related to the user's pen holding posture. Since each person's pen holding posture is different, the holding tilt angle β is an uncertain angle. During use, the holding tilt angle β generally varies within the range of 45 degrees to 90 degrees. In this embodiment, β=70° is taken because this angle is the average tilt angle when most people use the scanning pen, which can meet the usage habits of most people. In this embodiment, that is, when the first roller 23 and the second roller 33 are in contact with the scanned surface 40 at the same time and the holding tilt angle β=70°, the first rotating shaft 21 and the second rotating shaft 31 are respectively perpendicular to or approximately perpendicular to the scanned surface 40.

[0057] like Figure 3 As shown, when the line m between the first contact point 41 and the second contact point 42 of the first roller 23 and the second roller 33 that are in contact with the scanned paper surface 40 at the same time is vertically downward (i.e., parallel to the width direction of the scanned paper surface), the movement direction of the first roller 23 and the second roller 33 is horizontally rightward. The movement direction of the first roller 23 and the second roller 33 is Figure 3 The direction shown by the middle line k, at this time, the line k is parallel to the length direction a of the scanned surface 40. However, as Figure 4 and Figure 5As shown, when the initial placement position of the scanning pen is incorrect, or the scanning pen is tilted during use, resulting in a certain angle γ between the connecting line m between the first contact point 41 and the second contact point 42 and the width direction of the scanned paper surface 40, at this time, the angle between the movement trajectory of the first roller 23 and the second roller 33 and the length direction a of the scanned paper surface 40 is also γ, that is, the angle between the scanning trajectory of the scanning pen and the length direction of the scanned paper surface 40 is γ, and the scanning trajectory of the scanning pen will be skewed, resulting in scanning errors.

[0058] In this embodiment, a rotating mechanism is added to the roller part, that is, a first rotating shaft 21 is set on the first bracket 22 of the first roller 23, and a second rotating shaft 31 is set on the second bracket 32 ​​of the second roller 33. During the scanning process, the first roller 23 can rotate around the first rotating shaft 21, and the second roller 33 can rotate around the second rotating shaft 31. When the scanning pen is in an incorrect orientation and posture, resulting in a skewed or erroneous scanning trajectory, the first rotating shaft 21 and the second rotating shaft 31 are used to drive the first roller 23 and the second roller 33 to rotate respectively, so that the scanning trajectory of the scanning pen can be adaptively adjusted, thereby correcting the scanning trajectory and improving the scanning accuracy.

[0059] During use, the easier it is for the first roller 23 and the second roller 33 to turn, the smoother it is for adjusting the scanning trajectory during scanning, and the better the user experience. In this embodiment, in order to make the first roller 23 and the second roller 33 turn smoothly, during use, after the scanning pen is tilted at the designed angles α and β, it is necessary to ensure that the first rotating shaft 21 of the first roller 23 and the second rotating shaft 31 of the second roller 33 are both in a vertical state, that is, the first rotating shaft 21 and the second rotating shaft 31 are both perpendicular to or approximately perpendicular to the scanned surface 40, and the first rotating shaft 21 and the second rotating shaft 31 are both eccentrically arranged, that is, when the first roller 23 and the second roller 33 are in contact with the scanned surface 40 at the same time, the central axis of the first rotating shaft 21 deviates from the contact point between the first roller 23 and the scanned plane 40, and the central axis of the second rotating shaft 31 deviates from the contact point between the second roller 33 and the scanned plane 40. When the scanning track is skewed, the user applies a deflection force to the scanning pen, and the roller part of the scanning pen can rotate as a whole, thereby adjusting the scanning track to prevent the scanning track from being continuously deflected, so as to adjust the scanning track from the deflected state back to the horizontal state. During the use of the scanning pen, the roller part as a whole can rotate around the rotation axis relative to the scanning pen body, and the roller part as a whole can rotate around the contact point relative to the paper surface.

[0060] During the design, α and β are taken as the average tilt angles when most people use the scanning pen. Therefore, during the use of most people, the tilt angle varies in a small range near the designed values ​​of α and β. At this time, the first rotating shaft 21 and the second rotating shaft 31 are close to being in a vertical state, and the distance between the first contact point 41 and the first rotating shaft 21 and the distance between the second contact point 42 and the second rotating shaft 31 are also near the theoretical design values ​​and are relatively stable. Therefore, it is relatively easy for the first roller 23 and the second roller 33 to rotate as a whole under the action of the eccentric force.

[0061] like Figure 7 As shown, further, the first bracket 22 includes a first connecting portion 221 and two first fixing portions 222, the two first fixing portions 222 are arranged opposite to each other, one end of the first connecting portion 221 is connected to one first fixing portion 222, and the other end is connected to the other first fixing portion 222, the first rotating shaft 21 is connected to the first connecting portion 221, the first roller 23 is arranged between the two first fixing portions 222 and is rotatably connected to the two first fixing portions 222, and the rotating shaft of the first roller 23 is arranged perpendicular to the first rotating shaft 221.

[0062] The second bracket 32 ​​includes a second connecting portion 321 and two second fixing portions 322. The two second fixing portions 322 are arranged opposite to each other. One end of the second connecting portion 321 is connected to one second fixing portion 322, and the other end is connected to the other second fixing portion 322. The second rotating shaft 31 is connected to the second connecting portion 321. The second roller 33 is arranged between the two second fixing portions 322 and is rotatably connected to the two second fixing portions 322. The rotating shaft of the second roller 33 is arranged perpendicular to the second rotating shaft 31.

[0063] To ensure strength, the first bracket 22 and the second bracket 32 ​​are both made of metal. The first rotating shaft 21 and the second rotating shaft 31 are connected to the housing 10 using bearing rings made of self-lubricating metal or lubricating plastic POM to reduce the resistance of the first roller 23 and the second roller 33 to turning.

[0064] Furthermore, if Figure 8 As shown, the distance between the first vertical line perpendicular to the scanned surface 40 and passing through the first contact point 41 and the central axis of the first rotating shaft 21 is the first distance D1, and the range of the first distance D1 is greater than 0 mm and less than or equal to 5 mm. The distance between the second vertical line perpendicular to the scanned surface 40 and passing through the second contact point 42 and the central axis of the second rotating shaft 31 is the second distance D2, and the range of the second distance D2 is greater than 0 mm and less than or equal to 5 mm. The first distance D1 is equal to the second distance D2.

[0065] The first spacing D1 and the second spacing D2 are in the range of 0 to 5 mm. The first spacing D1 is the steering power arm of the first roller 23, and the second spacing D2 is the steering power arm of the second roller 33. When the first spacing D1 and the second spacing D2 are equal to 0 mm, theoretically, no matter how much bias force is applied, the first roller 23 and the second roller 33 cannot rotate. Therefore, the first spacing D1 and the second spacing D2 cannot be too small. If the first spacing D1 and the second spacing D2 are too small, it will cause the first roller 23 and the second roller 33 to turn difficultly. When designing, the first spacing D1 and the second spacing D2 can be appropriately increased to make the steering of the first roller 23 and the second roller 33 smoother. However, when designing, the first spacing D1 and the second spacing D2 cannot be too large. If the first spacing D1 and the second spacing D2 are too large, it will cause the overall size of the first roller assembly 20 and the second roller assembly 30 to be large, which is not conducive to the appearance design.

[0066] In some embodiments, the scanning end of the housing 10 is provided with a first limiting structure for limiting the rotation angle of the first bracket 22 and a second limiting structure for limiting the rotation angle of the second bracket 32, so that the first roller 23 and the second roller 33 rotate within a set angle range to avoid the first roller 23 and the second roller 33 from rotating too much and deflecting in other directions. In one example, the first limiting structure and the second limiting structure can be a protrusion, and the first bracket 22 and the second bracket 32 ​​stop rotating when they rotate to abut against the corresponding protrusions, so as to limit the first bracket 22 and the second bracket 32.

[0067] In another example, Fig. 9 and Fig.10 As shown, the scanning end of the housing 10 is provided with a first mounting groove 102 and a second mounting groove 103 , the first rotating shaft 21 and a portion of the first bracket 22 are installed in the first mounting groove 102 , and the second rotating shaft 31 and a portion of the second bracket 32 ​​are installed in the second mounting groove 103 .

[0068] A first limiting structure 1021 is provided in the first mounting groove 102, and a second limiting structure 1031 is provided in the second mounting groove 103. The first limiting structure 1021 and the second limiting structure 1031 both extend in the width direction of the shell 10, and the first limiting structure 1021 and the second limiting structure 1031 are both recessed portions; a first protrusion 223 extending in the width direction of the shell 10 is provided on the first bracket 22, and a second protrusion 323 extending in the width direction of the shell 10 is provided on the second bracket 32; the first protrusion 223 is located at In the first limiting structure 1021, the extension length of the first limiting structure 1021 is greater than the extension length of the first protrusion 223, and the rotation angle of the first bracket 22 is limited by the cooperation between the first protrusion 223 and the first limiting structure 1021; the second protrusion 323 is located in the second limiting structure 1031, and the extension length of the second limiting structure 1031 is greater than the extension length of the second protrusion 323, and the rotation angle of the second bracket 32 ​​is limited by the cooperation between the second protrusion 323 and the second limiting structure 1031.

[0069] The first protrusion 223 is located in the first limiting structure 1021. The first bracket 22 stops rotating when the left side of the first protrusion 223 abuts against the inner side wall of the left side of the first limiting structure 1021, so as to limit the clockwise rotation angle of the first bracket 22. Similarly, the first bracket 22 stops rotating when the right side of the first protrusion 223 abuts against the inner side wall of the right side of the first limiting structure 1021, so as to limit the counterclockwise rotation angle of the first bracket 22. Similarly, the clockwise rotation angle and counterclockwise rotation angle of the second bracket 32 ​​can be limited by the cooperation of the second protrusion 323 and the second limiting structure 1031. Preferably, the rotation angle range of the first bracket 22 is -30° to 30°; the rotation angle range of the second bracket 32 ​​is -30° to 30°.

[0070] In some embodiments, Fig.11 and Fig.12As shown, the scanning pen also includes two first magnets 50 and two second magnets 60, the two first magnets 50 are respectively arranged in the first mounting groove 102 and the second mounting groove 103 of the shell 10, one second magnet 60 is fixedly arranged on the first bracket 22 and is arranged opposite to the first magnet 50 in the first mounting groove 102, and the other second magnet 60 is fixedly arranged on the second bracket 32 ​​and is arranged opposite to the first magnet 50 in the second mounting groove 103; after the first bracket 22 rotates relative to the shell 10, the first bracket 22 and the first roller 23 are returned to the center by the opposite attraction between the first magnet 50 in the first mounting groove 102 and the second magnet 60 on the first bracket 22; after the second bracket 32 ​​rotates relative to the shell 10, the second bracket 32 ​​and the second roller 33 are returned to the center by the opposite attraction between the first magnet 50 in the second mounting groove 103 and the second magnet 60 on the second bracket 32.

[0071] The first magnet 50 includes an N pole and an S pole, and the second magnet 60 includes an N pole and an S pole; when the first roller 23 is at an angle of 0°, the N pole of the second magnet 60 on the first bracket 22 corresponds to the S pole of the first magnet 50 in the first mounting groove 102, and the S pole of the second magnet 60 on the first bracket 22 corresponds to the N pole of the first magnet 50 in the first mounting groove 102; when the second roller 33 is at an angle of 0°, the N pole of the second magnet 60 on the second bracket 32 ​​corresponds to the S pole of the first magnet 50 in the second mounting groove 103, and the S pole of the second magnet 60 on the second bracket 32 ​​corresponds to the N pole of the first magnet 50 in the second mounting groove 103.

[0072] The two first magnets 50 are fixed on the housing 10, and the two second magnets 60 are fixed on the first bracket 22 and the second bracket 32 ​​respectively. The two second magnets 60 rotate together with the first bracket 22 and the second bracket 32. The first magnet 50 and the second magnet 60 are respectively as shown in FIG. Fig.13 The multi-pole magnet shown may be composed of two magnets. By using the principle of magnets with opposite poles attracting each other, the first magnet 50 can automatically return the second magnet 60 to the correct position. When the scanning pen is not in use, the first roller 23 and the second roller 33 are at an angle of 0 degrees. At this time, the rotation axis of the first roller 23 and the first bracket 22 is parallel to the width direction of the scanned surface 40, and the rotation axis of the second roller 33 and the second bracket 32 ​​is parallel to the width direction of the scanned surface 40.

[0073] In this embodiment, the magnetic force between the first magnet 50 and the second magnet 60 cannot be too large. Under the premise of ensuring that the rollers can be corrected, the magnetic force between the first magnet 50 and the second magnet 60 needs to ensure that it does not affect the rotation of the first roller 23 and the second roller 33, so that the first roller 23 and the second roller 33 can rotate more smoothly during the correction. In addition, compared with the correction methods such as springs, the correction force of the magnet will not increase significantly as the roller rotation angle increases, and there will be no difficulty in rotation even if the rollers rotate at a large angle. For the correction mechanism such as springs, as the roller rotation angle increases, the greater the spring force, the more difficult it will be for the roller to deflect, affecting the normal correction of the scanning pen.

[0074] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A scanning pen, characterized in that: include: a housing having a scanning end and a centerline; A first roller assembly, comprising a first rotating shaft, a first bracket and a first roller, wherein the first bracket is rotatably connected to the scanning end of the housing through the first rotating shaft, and the first roller is disposed on the first bracket; A second roller assembly, comprising a second rotating shaft, a second bracket and a second roller, wherein the second bracket is rotatably connected to the scanning end of the housing via the second rotating shaft, and the second roller is disposed on the second bracket; When the first roller and the second roller are in contact with the scanned surface at the same time and in the length direction of the scanned surface, the angle between the center line of the shell and the scanned surface is a preset angle, the first rotation axis and the second rotation axis are respectively perpendicular or approximately perpendicular to the scanned surface, when the first roller and the second roller are in contact with the scanned surface at the same time, the contact point of the first roller with the scanned surface is the first contact point, the contact point of the second roller with the scanned surface is the second contact point, the first rotation axis deviates from the first contact point, and the second rotation axis deviates from the second contact point.

2. A scanning pen according to claim 1, characterized in that: A distance between a first perpendicular line perpendicular to the scanned surface and passing through the first contact point and the central axis of the first rotating shaft is a first distance, and the range of the first distance is greater than 0 mm and less than or equal to 5 mm.

3. A scanning pen according to claim 2, characterized in that: A distance between a second perpendicular line perpendicular to the scanned surface and passing through the second contact point and the central axis of the second rotating shaft is a second distance, and the range of the second distance is greater than 0 mm and less than or equal to 5 mm.

4. A scanning pen according to claim 3, characterized in that: The first interval is equal to the second interval.

5. The scanning pen according to claim 1, characterized in that: When the first roller and the second roller are in contact with the scanned surface at the same time, in the width direction of the scanned surface, an angle between a vertical line perpendicular to the scanned surface and a center line of the shell is greater than 0 degrees and less than 45 degrees.

6. The scanning pen according to claim 1, characterized in that: In the length direction of the scanned surface, an angle between a center line of the shell and the scanned surface is greater than or equal to 45 degrees and less than 90 degrees.

7. The scanning pen according to claim 1, characterized in that: The scanning end of the housing is provided with a first limiting structure for limiting the rotation angle of the first bracket and a second limiting structure for limiting the rotation angle of the second bracket.

8. The scanning pen according to claim 7, characterized in that: The scanning end of the housing is provided with a first mounting groove and a second mounting groove, the first rotating shaft and a part of the first bracket are installed in the first mounting groove, and the second rotating shaft and a part of the second bracket are installed in the second mounting groove.

9. The scanning pen according to claim 8, characterized in that: The first limiting structure is provided in the first installation groove, and the second limiting structure is provided in the second installation groove. The first limiting structure and the second limiting structure both extend along the width direction of the housing, and both the first limiting structure and the second limiting structure are recessed portions; The first bracket is provided with a first protrusion extending along the width direction of the shell, and the second bracket is provided with a second protrusion extending along the width direction of the shell; The first protrusion is located in the first limiting structure, the extension length of the first limiting structure is greater than the extension length of the first protrusion, and the rotation angle of the first bracket is limited by the cooperation between the first protrusion and the first limiting structure; The second protrusion is located in the second limiting structure, and the extension length of the second limiting structure is greater than the extension length of the second protrusion. The rotation angle of the second bracket is limited by the cooperation between the second protrusion and the second limiting structure.

10. The scanning pen according to claim 9, characterized in that: The rotation angle range of the first bracket is -30° to 30°; the rotation angle range of the second bracket is -30° to 30°.

11. The scanning pen according to claim 1, characterized in that: It also includes two first magnets and two second magnets, the two first magnets are respectively arranged on the shell, one second magnet is fixedly arranged on the first bracket and is arranged opposite to one first magnet, and the other second magnet is fixedly arranged on the second bracket and is arranged opposite to the other first magnet; after the first bracket rotates relative to the shell, the first bracket is returned to the center by the opposite attraction between the corresponding first magnet and the second magnet on the first bracket; after the second bracket rotates relative to the shell, the second bracket is returned to the center by the opposite attraction between the corresponding first magnet and the second magnet on the second bracket.

12. The scanning pen according to claim 11, characterized in that: The first magnet includes an N pole and an S pole, and the second magnet includes an N pole and an S pole; When the first roller is at an angle of 0°, the N pole of the second magnet on the first bracket corresponds to the S pole of the corresponding first magnet, and the S pole of the second magnet on the first bracket corresponds to the N pole of the corresponding first magnet; When the second roller is at an angle of 0°, the N pole of the second magnet on the second bracket corresponds to the S pole of the corresponding first magnet, and the S pole of the second magnet on the second bracket corresponds to the N pole of the corresponding first magnet.

13. The scanning pen according to claim 1, characterized in that: The first bracket includes a first connecting portion and two first fixing portions, the two first fixing portions are arranged opposite to each other, one end of the first connecting portion is connected to one of the first fixing portions, and the other end is connected to the other first fixing portion, the first rotating axis is connected to the first connecting portion, the first roller is arranged between the two first fixing portions and is rotatably connected to the two first fixing portions, and the rotating axis of the first roller is arranged perpendicular to the first rotating axis.

14. A scanning pen according to claim 13, characterized in that: The second bracket includes a second connecting portion and two second fixing portions, the two second fixing portions are arranged opposite to each other, one end of the second connecting portion is connected to one second fixing portion, and the other end is connected to the other second fixing portion, the second rotating axis is connected to the second connecting portion, the second roller is arranged between the two second fixing portions and is rotatably connected to the two second fixing portions, and the rotating axis of the second roller is arranged perpendicular to the second rotating axis.

15. The scanning pen according to claim 1, characterized in that: It also includes a scanning component, which is arranged at the scanning end of the housing and located between the first roller component and the second roller component.

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