Background and calibration device for a scanner

Abstract

A background and correction device for a scanner includes a base, a rotating assembly, and a cover plate. The base includes a body, a receiving space, and an opening. The rotating assembly is rotatably mounted on the base along a rotation axis. The rotating assembly includes a connecting structure, a first extension structure, and a second extension structure. The first extension structure is connected to the connecting structure and extends in a direction perpendicular to the rotation axis. The second extension structure is connected to the connecting structure and extends in a direction perpendicular to the rotation axis. The first extension structure has a first color, and the second extension structure has a second color. The cover plate is disposed on the base and covers the opening. The cover plate is light-transmitting. When the rotating assembly rotates relative to the base, the first and second extension structures can selectively be exposed through the cover plate corresponding to the opening.

Description

A background and correction device for a scanner Background and Calibration Device for a Scanner Technical Field

[0001] This application relates to a scanner, and more particularly to a background and calibration device for a scanner. Prior Technology

[0002] Generally, to improve scanning results, scanners typically include background and correction devices within the corresponding scanning module. However, existing background and correction devices are structurally complex, making it difficult to further reduce their size, and the assembly process is also quite complicated. Furthermore, existing background and correction devices are open-type assemblies, which can easily allow dust or paper to fall in and affect their functionality.

[0003] Therefore, how to reduce the size of the background and correction devices and modularize them through structural design improvements has become one of the important issues that this project aims to address. Summary of the Invention

[0004] To address the aforementioned technical problems, one technical solution adopted in this application is to provide a background and correction device for a scanner, comprising: a base, a rotating assembly, and a cover plate. The base includes a body, an accommodating space within the base, and an opening formed in the base and communicating with the accommodating space. The rotating assembly is rotatably disposed on the base along a rotation axis and located within the accommodating space. The rotating assembly includes a connecting structure, a first extending structure, and a second extending structure. The first extending structure is connected to one side of the connecting structure and extends in a direction perpendicular to the rotation axis. The second extending structure is connected to the other side of the connecting structure and extends in a direction perpendicular to the rotation axis. The first extending structure has a first color, and the second extending structure has a second color. The cover plate is disposed on the base and covers the opening. The cover plate is translucent. When the rotating assembly rotates relative to the base, the first extending structure and the second extending structure selectively correspond to the opening and are exposed through the translucent cover plate.

[0005] In one embodiment of this application, the first color is black, used as a black background and / or a black correction area. The second color is white, used as a white background and / or a white correction area.

[0006] In one embodiment of this application, the first extension structure includes a first connecting arm connected to the connecting structure and a first plate connected to the first connecting arm, and the second extension structure includes a second connecting arm connected to the connecting structure and a second plate connected to the second connecting arm. The first plate and the second plate are arc-shaped and can rotate along the rotation axis in the accommodating space, selectively corresponding to the opening and exposing the first color or the second color through the cover plate.

[0007] In one embodiment of this application, the first extension structure further includes a first abutment portion connected to the first plate, and the second extension structure further includes a second abutment portion connected to the second plate. When the first plate corresponds to the opening and is exposed through the cover plate, the second abutment portion abuts against the seat. When the second plate corresponds to the opening and is exposed through the cover plate, the first abutment portion abuts against the seat.

[0008] In one embodiment of this application, it further includes: a plate structure disposed on the base and corresponding to the opening, the plate structure having a third color. The first extension structure and the second extension structure are separate from each other and extend in different directions to form a clearance groove located between the connecting structure, the first extension structure, and the second extension structure. When the rotating assembly rotates relative to the base, the first extension structure, the second extension structure, and the plate structure can selectively correspond to the opening and be exposed through the light-transmitting cover plate.

[0009] In one embodiment of this application, when the first extension structure or the second extension structure is exposed corresponding to the cover plate, the first extension structure or the second extension structure can shield the plate structure to prevent the plate structure from being exposed corresponding to the cover plate. When the plate structure is exposed corresponding to the cover plate, the first extension structure and the second extension structure are located on both sides of the plate structure and do not correspond to the cover plate being exposed.

[0010] In one embodiment of this application, the first color is black, used as a black background and / or a black correction area; the second color is white, used as a white background or a white correction area; and the third color is white, used as a white background.

[0011] In one embodiment of this application, it further includes: a driving component and a power input component, the driving component being disposed on the base, the power input component being disposed on the rotating component, and the power input component being connected between the driving component and the rotating component, so that the driving component sequentially drives the power input component and the rotating component, thereby driving the rotating component to rotate along the rotation axis.

[0012] In one embodiment of this application, the power input assembly includes a transmission member and a contact member, which are disposed on the connecting structure. Both ends of the contact member abut against the transmission member and the connecting structure of the rotating assembly. The driving assembly, the transmission member, the contact member, and the connecting structure are sequentially connected so that the driving assembly sequentially drives the transmission member, the contact member, and the connecting structure. The connecting structure includes a pivot portion and a support portion connected to the pivot portion. The pivot portion is pivotally connected to the base. Both ends of the contact member abut against the transmission member and the support portion, respectively. The contact member can rotate or slide synchronously relative to the transmission member and / or the support portion. The contact member is a spring element.

[0013] In one embodiment of this application, the connecting structure further includes a shaft portion connected to the bearing portion, and the power feed assembly further includes a limiting member disposed on the shaft portion. The transmission member and the contact member are sleeved on the shaft portion, and the transmission member and the contact member are disposed between the limiting member and the bearing portion.

[0014] One of the beneficial effects of this application is that the background and correction device of the scanner provided by this application can achieve the effect of switching background area function and / or correction area function through the technical solution that "when the rotating component rotates relative to the base, the first extension structure and the second extension structure can selectively correspond to the opening and be exposed through the light-transmitting cover plate".

[0015] To gain a better understanding of the features and technical content of this application, please refer to the following detailed description and drawings. However, the drawings provided are for reference and illustration only and are not intended to limit this application. Simple Explanation of the Diagram

[0016] Figure 1 is a three-dimensional schematic diagram of one embodiment of the background and correction device of the scanner of this application. Figure 2 is a three-dimensional schematic diagram of another combination of the background and correction device of the scanner of this application in the first embodiment. Figure 3 is an exploded perspective view of one embodiment of the background and correction device of the scanner of this application. Figure 4 is another exploded perspective view of the background and correction device of the scanner of this application in the first embodiment. Figure 5 is a three-dimensional exploded cross-sectional view of the background and correction device of the scanner of this application in the first embodiment. Figure 6 is a perspective view of the drive assembly, drive power feed assembly, and rotation assembly of the first embodiment of the scanner background and correction device of this application. Figure 7 is a cross-sectional schematic diagram of the power feed assembly and rotation assembly of the background and correction device of the scanner of this application in the first embodiment. Figure 8 is a side cross-sectional view of the first extended structure of the scanner background and correction device of the present application, corresponding to the opening revealing the first color. Figure 9 is a side cross-sectional view of the second extension structure of the scanner background and correction device of the first embodiment of this application, corresponding to the opening revealing the second color. Figure 10 is a side cross-sectional view of the plate structure of the scanner background and correction device of the first embodiment of this application, with the third color exposed through the opening. Figure 11 is an exploded perspective view of the limiting member and connecting structure of the first embodiment of the background and correction device of the scanner of this application. Figure 12 is a perspective view of the background and the rotating assembly of the second embodiment of the scanner and calibration device of this application. Implementation

[0017] [First Embodiment]

[0018] First, please refer to Figures 1 to 5. Figures 1 and 2 are perspective views of the background and correction device of the scanner according to this application. Figures 3 and 4 are perspective exploded views of the background and correction device of the scanner according to this application. Figure 5 is a perspective exploded sectional view of the first embodiment of the background and correction device of the scanner according to this application. This application provides a background and correction device B for a scanner, which can be applied to a multi-function product / printer / peripheral (MFP) with photocopying and / or scanning functions. The background and correction device B can provide background area and correction area functions for the MFP. The background area can be used to increase the scanning quality of the scanner, and the correction area can be used for scanner correction before paper scanning. The background and correction device B includes a base 1, a rotating component 2, and a cover plate 3. The rotating component 2 and the cover plate 3 are disposed on the base 1, and the rotating component 2 is rotatably disposed on the base 1 to switch the background area function and / or correction area function by rotating the rotating component 2, thereby improving the scanning quality of the scanner.

[0019] As described above, the base 1 includes a body 11, an accommodating space 10 located within the body 11, and an opening 12 formed in the body 11 and communicating with the accommodating space 10. The body 11 may be a long rectangular structure, with the opening 12 on one side of the rectangular structure. The rotating component 2 is rotatably disposed on the body 11 along a rotation axis L (see Figure 7), and the rotating component 2 is located in the accommodating space 10. A cover plate 3 is disposed on the body 11 of the base 1 and is used to cover and close the opening 12 of the base 1. The cover plate 3 is light-transmitting, and when the rotating component 2 rotates relative to the base 1, the rotating component 2 can be exposed through the light-transmitting cover plate 3. For example, the cover plate 3 may be made of light-transmitting materials such as glass, acrylic, or plastic, but this application is not limited thereto. In addition, by using the cover plate 3 to close the opening 12 of the base 1, dust and other contaminants can be prevented from falling into the accommodating space 10 of the base 1 and causing pollution. Furthermore, since the rotating component 2 is rotatable, the cover plate 3 can be used to close the opening 12 of the base 1, which can also prevent the paper from getting stuck on the rotating component 2 due to warping or deformation during its travel, thus preventing paper damage. In this way, the cover plate 3 can increase the reliability of the scanner's background and the calibration device B.

[0020] Next, please refer to Figures 6 and 7. Figure 6 is a perspective view of the drive assembly, drive power input assembly, and rotation assembly of the first embodiment of the background and correction device of the scanner of this application. Figure 7 is a cross-sectional view of the power input assembly and rotation assembly of the first embodiment of the background and correction device of the scanner of this application. The background and correction device B further includes: a drive assembly 5 and a power input assembly 6. The drive assembly 5 is disposed on the base 1, and the power input assembly 6 is disposed on the rotation assembly 2. The power input assembly 6 is connected between the drive assembly 5 and the rotation assembly 2, so that the drive assembly 5 sequentially drives the power input assembly 6 and the rotation assembly 2, thereby driving the rotation assembly 2 to rotate along the rotation axis L.

[0021] As described above, the rotating assembly 2 includes a connecting structure 21, a first extension structure 22, and a second extension structure 23. The first extension structure 22 is connected to one side of the connecting structure 21 and extends in a direction perpendicular to the rotation axis L. The second extension structure 23 is connected to the other side of the connecting structure 21 and extends in a direction perpendicular to the rotation axis L. The first extension structure 22 has a first color, and the second extension structure 23 has a second color. When the rotating assembly 2 rotates relative to the base 1, the first extension structure 22 and the second extension structure 23 can selectively correspond to the opening 12, and the first color of the first extension structure 22 or the second color of the second extension structure 23 is exposed through the light-transmitting cover plate 3. This allows for switching between background area functions and / or correction area functions.

[0022] As described above, in the first embodiment, the scanner's background and correction device B further includes: a plate structure 4, which is disposed on the base 11 and corresponds to the opening 12. The plate structure 4 has a third color, which can be oriented towards the opening 12. When the rotating assembly 2 rotates relative to the base 1, the first extension structure 22, the second extension structure 23, and the plate structure 4 can selectively correspond to the opening 12 and be exposed through the light-transmitting cover plate 3. In other words, in the first embodiment, one of the first extension structure 22, the second extension structure 23, and the plate structure 4 can be selectively exposed to correspond to the opening 12.

[0023] As described above, please refer to Figure 5 again. The base 11 includes a frame 111 and a rod 112 disposed in the frame. The rod 112 can be disposed toward the opening 12. The plate structure 4 can be disposed on the rod 112. The first extension structure 22 and the second extension structure 23 can be located on opposite sides of the plate structure 4, respectively.

[0024] Next, please refer to Figures 8 to 10. Figure 8 is a side cross-sectional view of the first extension structure corresponding to the opening revealing the first color; Figure 9 is a side cross-sectional view of the second extension structure corresponding to the opening revealing the second color; and Figure 10 is a side cross-sectional view of the plate structure corresponding to the opening revealing the third color. The first extension structure 22 and the second extension structure 23 are separate from each other and extend in different directions to form a clearance groove 20 located between the connecting structure 21, the first extension structure 22, and the second extension structure 23. For example, the plate structure 4 can be fixedly mounted on the rod 112 of the base 11 and located in the accommodating space 10. Further, the plate structure 4 can be located in the clearance groove 20. When the rotating assembly 2 rotates relative to the base 1, the position of the clearance groove 20 can correspond to the relative movement of the plate structure 4. Furthermore, the first extension structure 22 and the second extension structure 23 are separate from each other and are connected only by the connecting structure 21, so that when the rotating component 2 rotates relative to the base 1, the plate structure 4 can be exposed corresponding to the cover plate 3 through the gap between the first extension structure 22 and the second extension structure 23.

[0025] Furthermore, when the first extension structure 22 or the second extension structure 23 is exposed relative to the cover plate 3, the first extension structure 22 or the second extension structure 23 can shield the plate structure 4 to prevent the plate structure 4 from being exposed relative to the cover plate 3. When the plate structure 4 is exposed relative to the cover plate 3, the first extension structure 22 and the second extension structure 23 are located on both sides of the plate structure 4 and are not exposed relative to the cover plate 3. In this way, the desired first color, second color, or third color can be controlled by rotating the drive assembly 5.

[0026] As described above, for example, the first color can be black to serve as a black background and / or a black correction area; the second color can be white to serve as a white background or a white correction area; and the third color can be white to serve as a white background, thus switching between background area and correction area functions. Furthermore, in other embodiments, the colors of the first, second, and / or third colors can be adjusted as needed. Additionally, for example, when scanning thin paper or translucent documents (such as slides), the user can select a white background to soften the image on the back of the paper. A black background can increase edge contrast when scanning white paper.

[0027] Next, please refer to Figures 8 to 10. When the first extension structure 22 corresponds to the opening 12 and exposes the first color through the cover plate 3, the second extension structure 23 can abut against the frame 111 of the base 11. When the second extension structure 23 corresponds to the opening 12 and exposes the second color through the cover plate 3, the first extension structure 22 can abut against the frame 111 of the base 11.

[0028] As described above, the first extension structure 22 may include a first connecting arm 221 connected to the connecting structure 21 and a first plate 222 connected to the first connecting arm 221. The second extension structure 23 may include a second connecting arm 231 connected to the connecting structure 21 and a second plate 232 connected to the second connecting arm 231. That is, the first connecting arm 221 is connected between the connecting structure 21 and the first plate 222, and the second connecting arm 231 is connected between the connecting structure 21 and the second plate 232. The first plate 222 and the second plate 232 may be arc-shaped and can rotate along the rotation axis L in the accommodating space 10. During the rotation of the first plate 222 and the second plate 232 along the rotation axis L, they can move closer to or away from the cover plate 3. The first color may be located on the outer contour surface of the first plate 222, and the second color may be located on the outer contour surface of the second plate 232, so as to selectively correspond to the opening 12 and expose the first color or the second color through the cover plate 3.

[0029] As described above, the first extension structure 22 further includes a first abutment portion 223 connected to the first plate 222, and the second extension structure 23 further includes a second abutment portion 233 connected to the second plate 232. When the first plate 222 corresponds to the opening 12 and is exposed through the cover plate 3, the second abutment portion 233 abuts against the frame 111 of the base 11. When the second plate 232 corresponds to the opening 12 and is exposed through the cover plate 3, the first abutment portion 223 abuts against the frame 111 of the base 11. For example, the frame 111 may include a top cover 1110, and the first abutment portion 223 and the second abutment portion 233 may abut against the top cover 1110. However, in other embodiments, the first abutment portion 223 and the second abutment portion 233 may also abut against other parts of the frame 111.

[0030] Next, please refer to Figures 3 to 7, and also to Figure 11, which is an exploded perspective view of the limiting member and connection structure of the first embodiment of the background and correction device of the scanner of this application. In this application, the driving component 5 may include a motor 51 and a gear set 52, so that the motor 51 drives the gear set 52 to drive the power feed component 6. For example, the motor 51 may be a stepper motor, and the gear set 52 may include multiple gears. However, in other embodiments, the motor may be other types of driving elements, such as a servo motor, and the number of gears in the gear set 52 is not limited. Furthermore, the motor 51 can reciprocate in both clockwise and counterclockwise directions, causing the rotating component 2 to reciprocate relative to the base 1 in both clockwise and counterclockwise directions, thereby switching between the background area function and / or the correction area function. Furthermore, in this application, the drive component 5 can serve as a power source for independently controlling the rotation component 2, thereby allowing the background and correction device B of the scanner provided in this application to be mounted on different scanners as needed.

[0031] As described above, the power input assembly 6 may include a transmission member 61 and a contact member 62. The transmission member 61 and the contact member 62 are disposed on the connecting structure 21. The two ends of the contact member 62 respectively abut against the connecting structure 21 between the transmission member 61 and the rotating assembly 2. The drive assembly 5, the transmission member 61, the contact member 62, and the connecting structure 21 are sequentially connected so that the drive assembly 5 sequentially drives the transmission member 61, the contact member 62, and the connecting structure 21. For example, the transmission member 61 may have teeth corresponding to the gear set 52 so that the rotating assembly 2 is driven by the meshing of the gear set 52 and the transmission member 61. In addition, the contact member 62 may be an elastic element, such as a compression spring element or an elastic element, to provide a resisting force abutting against the transmission member 61 and the connecting structure 21.

[0032] As described above, the connecting structure 21 may include a pivot portion 211 and a bearing portion 212 connected to the pivot portion 211. The pivot portion 211 is pivotally connected to the base 11. The two ends of the contact member 62 abut against the transmission member 61 and the bearing portion 212, respectively. The contact member 62 can rotate or slide synchronously relative to the transmission member 61 and / or the bearing portion 212. For example, the pivot portion 211 may be a protrusion pivotally connected to a hole in the base 11, but this application is not limited thereto. In this way, since the contact member 62 contacts the transmission member 61 and the connecting structure 21 only by the pushing force of the spring, when the motor 51 rotates clockwise or counterclockwise beyond a certain angle, the contact member 62 can slide relative to the transmission member 61 and / or the connecting structure 21 to avoid tooth skipping or slippage between the gear set 52 and the gears on the transmission member 61, which would damage the teeth of the gear set 52 or the transmission member 61.

[0033] Furthermore, the contact member 62 used in this application rests against the transmission member 61 and the support portion 212 using only one resisting force. Therefore, when the motor 51 drives the rotating assembly 2 so that the first plate 222 is exposed corresponding to the opening 12 and the second abutting portion 233 abuts against the seat 11, or when the second plate 232 is exposed corresponding to the opening 12 and the first abutting portion 223 abuts against the seat 11, its sliding effect can be utilized to avoid the problem of tooth skipping or slippage caused by excessive rotation of the motor 51.

[0034] As described above, the connecting structure 21 further includes a shaft portion 213 connected to the bearing portion 212, and the power feed assembly 6 further includes a limiting member 63 disposed on the shaft portion 213. The transmission member 61 and the contact member 62 are sleeved on the shaft portion 213, and are disposed between the limiting member 63 and the bearing portion 212. This allows the limiting member 63 to fix the position of the transmission member 61 and the contact member 62 relative to the shaft portion 213.

[0035] As described above, as shown in Figure 11, for example, the limiting member 63 may include a snap-fit ​​part 630, and the connecting structure 21 may include a fastening part 214. During assembly, the limiting member 63 can be screwed into the connecting structure 21, and the snap-fit ​​part 630 of the limiting member 63 can be fastened to the fastening part 214 of the connecting structure 21 by using the abutment of the contact member 62.

[0036] Next, please refer to Figure 7 again. The transmission member 61 includes a body 611, a meshing portion 612 connected to the body 611, and a stop portion 613 connected to the body 611. The meshing portion 612 is connected to the drive assembly 5, and the meshing portion 612 can be a gear tooth as described above. A limiting member 63 abuts against one side of the stop portion 613, and a contact member 62 abuts against the other side of the stop portion 613, so as to use the limiting member 63 to position the transmission member 61. The body 611 of the transmission member 61 can be hollow, and the contact member 62 can be disposed in the space within the body 611.

[0037] Next, in an embodiment of this application, the power input assembly 6 may further include a friction element 64, which may be sleeved on the shaft portion 213 and disposed between the transmission member 61 and the contact member 62. The friction element 64 may have wear resistance so that the transmission member 61 can reduce wear when sliding against the contact member 62. For example, the friction element 64 may be made of a material with high wear resistance and a high coefficient of friction, such as plastic (polycarbonate) or a material with added wear-resistant Teflon. However, it should be noted that in other embodiments, the friction element 64 may not be provided, and the contact member 62 may be in direct contact with the transmission member 61, and the contact surface between the transmission member 61 and the contact member 62 may be roughened to improve the coefficient of friction. This application is not limited to this.

[0038] [Second Embodiment]

[0039] Please refer to Figure 12, which is a perspective view of the rotating assembly of the second embodiment of the scanner background and correction device of this application. As shown in the figure, the background and correction device B of the scanner in the second embodiment is generally similar to the background and correction device B of the scanner in the previous embodiment. Therefore, the arrangement or operation of the same components will not be described again here. The difference between the second embodiment and the first embodiment is that the background and correction device B of the scanner provided in the second embodiment may not include the plate structure 4. That is, the background area function and / or correction area function can be switched by simply switching the first extension structure 22 and the second extension structure 23.

[0040] As described above, the rotating assembly 2 includes a connecting structure 21, a first extension structure 22, and a second extension structure 23. The first extension structure 22 is connected to one side of the connecting structure 21 and extends in a direction perpendicular to the rotation axis L. The second extension structure 23 is connected to the other side of the connecting structure 21 and extends in a direction perpendicular to the rotation axis L. The first extension structure 22 has a first color, and the second extension structure 23 has a second color. Furthermore, in the second embodiment, since there is no need to provide a plate structure 4, the first extension structure 22 and the second extension structure 23 can be connected to each other to form an arc-shaped structure. However, it should be noted that in other embodiments, the shapes of the first extension structure 22 and the second extension structure 23 can also be separated from each other as shown in the first embodiment. This application is not limited to this, as long as the first extension structure 22 and the second extension structure 23 have the first color and the second color respectively.

[0041] Next, in the second embodiment, the first color can be black, serving as a black background and / or a black correction area, and the second color can be white, serving as a white background and / or a white correction area. When the rotating component 2 rotates relative to the base 1, the first extension structure 22 and the second extension structure 23 can selectively correspond to the opening 12, and the first color of the first extension structure 22 or the second color of the second extension structure 23 is exposed through the light-transmitting cover plate 3.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0043] B: Background and Correction Device 1: Base 10: Storage space 11: base body 111: Frame 1110: Top Cover 112: Rod 12: Opening 2: Rotating component 20: Clearance slot 21: Connection Structure 211: Pivot section 212: Supporting part 213: Shaft 214: Fastening part 22: First extension structure 221: First connecting arm 222: First Plate 223: First Reservation Section 23: Second extension structure 231: Second connecting arm 232: Second Plate 233: Second Reservoir 3: Cover plate 4: Plate structure 5: Driver Components 51: Motor 52: Gear Set 6: Power Feed Components 61: Transmission components 611:Ontology 612: Meshing part 613: Stop section 62: Contact element 63: Limiting component 630: Buckle section 64: Friction components L: Axis of rotation

Claims

1. A background and correction device for a scanner, comprising: A base, the base comprising a body, an accommodating space located in the body, and an opening formed in the body and communicating with the accommodating space; a rotating assembly rotatably disposed on the body along a rotation axis and located in the accommodating space, the rotating assembly comprising a connecting structure, a first extending structure, and a second extending structure, the first extending structure being connected to one side of the connecting structure and extending in a direction perpendicular to the rotation axis, the second extending structure being connected to the other side of the connecting structure and extending in a direction perpendicular to the rotation axis, the first extending structure having a first color, and the second extending structure having a second color; And a cover plate disposed on the base body of the base and covering the opening, the cover plate being light-transmitting; wherein, when the rotating assembly rotates relative to the base, the first extension structure and the second extension structure can selectively correspond to the opening and be exposed through the light-transmitting cover plate.

2. The background and correction apparatus for the scanner as described in claim 1, wherein, The first color is black, used as a black background and / or a black correction area; wherein the second color is white, used as a white background and / or a white correction area.

3. The background and correction apparatus for the scanner as described in claim 1, wherein, The first extension structure includes a first connecting arm connected to the connecting structure and a first plate connected to the first connecting arm; the second extension structure includes a second connecting arm connected to the connecting structure and a second plate connected to the second connecting arm; wherein the first plate and the second plate are arc-shaped and can rotate along the rotation axis in the accommodating space, and selectively correspond to the opening and expose the first color or the second color through the cover plate.

4. The background and correction apparatus for the scanner as described in claim 3, wherein, The first extension structure further includes a first abutment portion connected to the first plate, and the second extension structure further includes a second abutment portion connected to the second plate; wherein, when the first plate corresponds to the opening and is exposed through the cover plate, the second abutment portion abuts against the seat, and when the second plate corresponds to the opening and is exposed through the cover plate, the first abutment portion abuts against the seat.

5. The background and correction apparatus for the scanner as described in claim 1, further comprising: A plate structure is disposed on the base and corresponding to the opening, the plate structure having a third color; wherein the first extension structure and the second extension structure are separate from each other and extend in different directions to form a clearance groove located between the connecting structure, the first extension structure and the second extension structure; wherein, when the rotating assembly rotates relative to the base, the first extension structure, the second extension structure and the plate structure can selectively correspond to the opening and be exposed through the light-transmitting cover plate.

6. The background and correction apparatus for the scanner as described in claim 5, wherein, When the first extension structure or the second extension structure is exposed corresponding to the cover plate, the first extension structure or the second extension structure can cover the plate structure to prevent the plate structure from being exposed corresponding to the cover plate; when the plate structure is exposed corresponding to the cover plate, the first extension structure and the second extension structure are located on both sides of the plate structure and do not correspond to the cover plate being exposed.

7. The background and correction apparatus for the scanner as described in claim 5, wherein, The first color is black, used as a black background and / or a black correction area; the second color is white, used as a white background or a white correction area; and the third color is white, used as a white background.

8. The background and correction apparatus for the scanner as described in claim 1, further comprising: A drive assembly and a power input assembly are provided. The drive assembly is disposed on the base, and the power input assembly is disposed on the rotating assembly. The power input assembly is connected between the drive assembly and the rotating assembly so that the drive assembly sequentially drives the power input assembly and the rotating assembly, thereby driving the rotating assembly to rotate along the rotation axis.

9. The background and correction apparatus for the scanner as described in claim 8, wherein, The power input assembly includes a transmission member and a contact member, which are disposed on the connecting structure. The two ends of the contact member abut against the transmission member and the connecting structure of the rotating assembly, respectively. The driving assembly, the transmission member, the contact member, and the connecting structure are sequentially connected so that the driving assembly sequentially drives the transmission member, the contact member, and the connecting structure. The connecting structure includes a pivot portion and a support portion connected to the pivot portion. The pivot portion is pivotally connected to the base. The two ends of the contact member abut against the transmission member and the support portion, respectively. The contact member can rotate or slide synchronously relative to the transmission member and / or the support portion. The contact member is a spring element.

10. The background and correction apparatus for the scanner as described in claim 9, wherein, The connecting structure further includes a shaft connected to the bearing portion, and the power feed assembly further includes a limiting member disposed on the shaft portion; wherein the transmission member and the contact member are sleeved on the shaft portion, and the transmission member and the contact member are disposed between the limiting member and the bearing portion.

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