CN102256037B - Scanning mechanism - Google Patents

Abstract

The invention relates to a scanning mechanism which comprises a scanning unit, a track and a transmission member. The scanning unit is provided with an engaging part and a bearing part, wherein the scanning unit is slidably arranged on the track through the bearing part. The transmission member is connected to the joint part of the scanning unit to drive the scanning unit to slide along the track. The orthographic projection of the joint part on the track and the orthographic projection of the bearing part on the track are mutually overlapped. The scanning mechanism of the invention can make the scanning unit move smoothly, thereby improving the image scanning quality of the scanning mechanism.

Description

scanning mechanism

technical field

The invention relates to a scanning mechanism, in particular to a scanning mechanism of an optical scanning module.

Background technique

Along with the progress of software and hardware, scanner has become one of basic equipment of many computer users, and it can scan text or image data such as document, magazine, book, picture, input computer and process.

Among various scanners, the flatbed scanner is the most commonly used one. When it is desired to scan a document, a transmission mechanism such as a motor, a gear set on the scanning unit, and a transmission belt is required to drive the scanning unit, and the scanning unit slides along a guide shaft to be placed horizontally above the scanning unit. target object to scan.

However, in this mechanism, since the above-mentioned motors, transmission belts and gear sets are usually arranged on one side of the guide shaft, and there is a distance from the guide shaft, when the motor drives the scanning unit through the transmission belt, the transmission belt will scan the scanning unit. The unit creates torque. This torque will make the scanning unit unable to move parallelly along the guide shaft, so that there will be a gap in the moving distance between the opposite sides of the scanning unit, and thus the quality of the scanned image will be unstable.

Contents of the invention

The object of the present invention is to provide a scanning mechanism so that its scanning unit can move smoothly.

An embodiment of the present invention provides a scanning mechanism, which includes a scanning unit, a track and a transmission member. The scanning unit has a joint part and a supporting part, wherein the scanning unit is slidably arranged on the track through the supporting part. The transmission member is connected to the joint part of the scanning unit to drive the scanning unit to slide along the track. The orthographic projection of the engaging portion on the rail and the orthographic projection of the bearing portion on the rail overlap each other.

In an embodiment of the present invention, the above-mentioned engaging portion and supporting portion are substantially located at the center of the scanning unit.

In an embodiment of the present invention, the scanning unit has two opposite sides, and the transmission element is a belt. One end of the belt is connected to one of the sides of the scanning unit, and the other end of the belt goes around the rail and is connected to the other one of the sides of the scanning unit.

In an embodiment of the present invention, the belt and the track are substantially located on the same plane.

In an embodiment of the present invention, the above-mentioned scanning mechanism further includes a base disposed under the scanning unit, wherein the above-mentioned track is a protrusion extending from the base toward the scanning unit.

In an embodiment of the present invention, the above-mentioned scanning mechanism further includes a guide rod disposed below the scanning unit, and the above-mentioned track is a part of the rod surface of the supporting part that rests on the guide rod.

In an embodiment of the present invention, the above-mentioned guide rod has a hollow portion, and the belt is connected to the scanning unit through the hollow portion.

Based on the above, in the above-mentioned embodiments of the present invention, since the scanning unit is connected to the transmission part, and the supporting part of the scanning unit is coupled to the rail, the orthographic projections on the rail overlap each other, so when the transmission part is When the scanning unit is driven to slide along the track, this kind of mutual configuration prevents the transmission member from generating a torque that causes the scanning unit to deflect, so the scanning mechanism can make the scanning unit slide along the track in parallel, thereby improving the scanning unit’s stability. Scan quality.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a scanning mechanism according to an embodiment of the present invention.

Fig. 2 is a partial cross-sectional view of a scanning mechanism in another embodiment of the present invention at the transmission part and the track.

Fig. 3 is a schematic diagram of a scanning mechanism according to another embodiment of the present invention.

Description of main component symbols:

100, 300: scanning mechanism; 110: scanning unit;

112: joint part; 114: bearing part;

120, 320: track; 122: hollow part;

130, 230: transmission parts; 140: transmission module;

142: motor; 144: belt gear;

146: pulley; 350: base;

E1: first side; E2: second side;

P1: plane.

Detailed ways

FIG. 1 is a schematic diagram of a scanning mechanism according to an embodiment of the present invention. Please refer to FIG. 1 , in this embodiment, the scanning mechanism 100 is applied in a scanner (not shown). The scanning mechanism 100 includes a scanning unit 110 , a track 120 and a transmission member 130 . The scanning unit 110 is, for example, a set of arrayed charge coupled devices (CCD for short) (not shown) for optically sensing an object (not shown) to achieve the purpose of image scanning. The scanning unit 110 has a joint portion 112 and a supporting portion 114 , wherein the scanning unit 110 is slidably disposed on the track 120 through the supporting portion 114 . The transmission member 130 is connected to the joint portion 112 of the scanning unit 110 to drive the scanning unit 110 to slide along the track 120 .

The orthographic projection of the engaging portion 112 on the rail 120 and the orthographic projection of the supporting portion 114 on the rail 120 overlap each other. In other words, the track 120 , the engaging portion 112 and the supporting portion 114 in this embodiment are located on the same plane P1 , and the engaging portion 112 is located above the supporting portion 114 . In this way, when the scanning unit 110 is driven by the transmission member 130 to slide along the track 120, the resultant torque exerted by the transmission member 130 on the scanning unit 110 is substantially zero, so that the transmission member 130 will drive the scanning unit 110 along the track 120. Sliding parallel to the track 120 without generating a torque that causes the scanning unit 110 to sway, so as to avoid the situation that the scanning distances on opposite sides of the scanning unit 110 are inconsistent.

Further details are as follows, in this embodiment, the transmission member 130 is, for example, a belt, one end of which is connected to a first side E1 of the scanning unit 110, and the other end of which goes around the track 120 and is connected to the scanning unit 110 relative to A second side E2 of the first side E1. In this embodiment, the transmission member 130 is connected to the joint portion 112 of the scanning unit 110 through, for example, a clamping mechanism (not shown). Furthermore, the joint portion 112 and the supporting portion 114 are substantially located at the center of the scanning unit 110 . This embodiment does not limit the structural shape of the transmission member 130 and its connection mechanism to the scanning unit 110 . In another unillustrated embodiment of the present invention, the transmission member can also be a rope or a chain, and the clamping mechanism also varies with the type of the transmission member.

In addition, in this embodiment, the scanning mechanism 100 includes a transmission module 140 , and the transmission module 140 includes a motor 142 , a belt gear 144 , a pulley 146 and the above-mentioned transmission member 130 . The belt gear 144 is disposed on the motor 142 , and the transmission member 130 is engaged with the belt gear 144 and supports the transmission member 130 through the pulley 146 . The pulley 146 also has an adjusting mechanism (not shown) for adjusting the tension of the belt. This embodiment does not limit the form of the motor 142, the belt gear 144 and the pulley 146 in the transmission module 140, there are other ways that can be used to drive the transmission member 130, the above embodiment is only one of many embodiments of the present invention .

In addition, the present invention does not limit the position of the joint portion 112 and the supporting portion 114 on the scanning unit 110. In another not-shown embodiment of the present invention, the track 120, the joint portion 112 and the supporting portion 114 all conform to On the premise that the joint part 112 is located directly above the supporting part 114 on the same plane, the joint part 112 and the supporting part 114 can also be located on any side of the scanning unit 110, that is, the rail 120 can pass through any side of the scanning unit 110 .

In this embodiment, the rail 120 is, for example, a guide rod, which is located below the scanning unit 110, and the scanning unit 110 is coupled to a part of the rod surface of the guide rod through the supporting portion 114, and the transmission member 130 and the rail 120 are substantially Both are located on the plane P1, so that the force exerted by the transmission member 130 on the scanning unit 110 is parallel to the track 120 and located on the plane P1, so as to ensure that the transmission member 130 will not cause the scanning unit 110 to deflect the torque. Moreover, the rail 120 has a hollow portion 122 , wherein the transmission member 130 passes through the hollow portion 122 and is connected to the scanning unit.

However, this embodiment is not limited thereto. FIG. 2 is a partial cross-sectional view of a scanning mechanism in another embodiment of the present invention at the transmission part and the track. Please refer to Fig. 2, different from the above-mentioned embodiment, the transmission part 230 of the present embodiment bypasses the hollow portion 122 of the track 120, that is, the belt in the present embodiment is wrapped around the top and bottom of the guide bar, which can also achieve The same effect as the above-mentioned embodiment.

Accordingly, the present invention does not limit the structural shape of the track 120 . In another unillustrated embodiment of the present invention, the track can also be a guide rod with other cross-sectional shapes.

Furthermore, FIG. 3 is a schematic diagram of a scanning mechanism according to another embodiment of the present invention. Please refer to FIG. 3 , in this embodiment, the scanning mechanism 300 includes the same transmission member 130 and the scanning unit 110 as the above-mentioned embodiments, and the difference is that the scanning mechanism 300 also includes a base 350, which is arranged on the scanning unit 110 below. The track 320 is a protrusion extending from the base 350 toward the scanning unit 110 . Accordingly, the scanning unit 110 can be slidably coupled to the track 320 through the supporting portion 114 , and the transmission member 130 passes through the bottom of the base 350 to be connected to the scanning unit 110 .

As can be seen from the above-mentioned embodiment of FIG. 1 and the embodiment of FIG. 3 , the present invention does not limit the structural appearance of the rail 120 and the rail 320. Planar person, all can be applicable to the present invention. In other words, the designer can change the structural appearance of the track 120 and the track 320 according to the space and transmission mode in the scanner, or properly combine the track 120 and the track 320 with other components in the scanner.

To sum up, in the above-mentioned embodiments of the present invention, the orthographic projections of the joint portion and the support portion of the scanning mechanism on the track overlap each other, so that the three are located on the same plane and the joint portion is located on the support portion The above configuration effect. In this way, when the scanning unit is driven by the transmission member, no torque causing the scanning unit to swing will be generated, so that the scanning unit can slide along the track in parallel. This allows the opposite sides of the scanning module to move at the same distance per unit time, so as to effectively improve the stability of the scanning unit when sliding, thereby improving the image scanning quality of the scanning mechanism.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art can make appropriate changes or equivalent replacements without departing from the spirit and scope of the present invention, so the protection scope of the present invention The scope defined in the claims shall prevail.

Claims (6)

1. a sweep mechanism, is characterized in that, comprising:

One scan unit, has a junction surface and a bearing and leaning portion;

One track, described scanning element is configured in slidably by bearing and leaning portion on described track; And

One driving member, is connected to the described junction surface of described scanning element, and described driving member drives described scanning element to slide along described track, and orthographic projection and the described bearing and leaning portion orthographic projection on described track of wherein said junction surface on described track is overlapped,

Wherein said scanning element has relative two sides, and described driving member is a belt, one end of described belt is connected to one of them of described two sides of described scanning element, and the other end of described belt is walked around described track and wherein another of the described two sides that are connected to described scanning element.

2. sweep mechanism according to claim 1, is characterized in that, described bearing and leaning portion and described junction are in the central authorities of described scanning element.

3. sweep mechanism according to claim 1, is characterized in that, described belt and described track are in the same plane.

4. sweep mechanism according to claim 1, is characterized in that, also comprises:

One base, is configured in the below of described scanning element, and described track by from described base towards the extended projection of described scanning element.

5. sweep mechanism according to claim 1, is characterized in that, also comprises:

One guide post, is configured in the below of described scanning element, and described track bears against the part pole face on described guide post for described bearing and leaning portion.

6. sweep mechanism according to claim 5, is characterized in that, described guide post has a hollow bulb, and described belt is connected to described scanning element through described hollow bulb.

Images