CN2359744Y - An Improved Scanner Transmission Mechanism - Google Patents

Abstract

An improved scanner drive mechanism features that the transparent glass plate of scanner is used to support the upper cover of scanner for intensifying the bearing power of drive mechanism, avoiding the deformation of casing caused by temp and moisture effect, and an elastic sheet is arranged at lower end of scanner head for supporting the slide track to ensure the consistent contact between scanner head, slide track and upper cover in scanning procedure. The driving mechanism is widely used in a driving mechanism of a scanner.

Description

An Improved Scanner Transmission Mechanism

The utility model relates to a scanner transmission mechanism, in particular to a scanner transmission mechanism which can make the scanning optical path and image level shake tend to be stable and consistent.

At present, office automation has become a trend in the information-based society. In addition to using computers to process and store large amounts of data, scanners are also used as input devices for documents, forms, and images, which can also effectively improve the efficiency of input data. s efficiency. A general scanner mainly includes components such as light source, transparent glass plate, scanning head, transmission mechanism, electronic circuit, power supply and frame. The structural design and configuration of each component may be different, but the scanning head must The optical path must be kept fixed to avoid distortion and distortion of the data input to the scanner, especially for high-resolution scanners or CIS scanners, this requirement is even more serious.

The schematic diagram of the existing scanner transmission mechanism is shown in Figure 1. Most of the belts or cables are used as the medium to drive the power components. During the scanning process, torque is generated due to the center of gravity of the model itself and the intermittent walking of the stepping motor. Horizontal vibration will affect the scanned image, causing faults and poor color overlapping; and because the shape of the transmission mechanism itself is erected on the base, under long-term use, it is easy to cause the shell to deform and shrink due to the environmental temperature and humidity effect, making the The scanned image is affected by the change of the optical path, resulting in undesirable phenomena such as image blur.

The main purpose of this new model is to provide a flat upper cover by utilizing the advantages of flat physical properties of glass, and fix the slide rail carrying the weight of the scanning head to the upper cover, and use the principle that the bearing capacity of glass is better than that of plastic, to strengthen The bearing capacity of the entire transmission mechanism avoids the deformation and shrinkage of the shell of the existing scanner transmission mechanism due to the environmental temperature and humidity effect, so that the scanned image is affected by the change of the optical path, resulting in image blurring.

The secondary purpose of this utility model is to provide a transmission mechanism of a scanner, which can effectively improve the horizontal vibration of the existing scanner transmission mechanism due to its own shape and center of gravity and the intermittent walking of the stepping motor. The scanned image is affected, resulting in faulty color stacking of faults.

The technical solutions and embodiments of the present utility model are described below in conjunction with the accompanying drawings of the description.

Description of drawings:

FIG. 1 is a schematic diagram of an existing scanner transmission mechanism;

Fig. 2 is the schematic diagram of the utility model;

Fig. 3 is a sectional view of the utility model;

Fig. 4 is a schematic diagram of the position of the shrapnel in the utility model.

As shown in FIG. 2 , the utility model mainly includes: a slide rail 20 , a scanning head 21 , a transmission shaft 23 , a glass transparent plate 201 and an upper cover 22 . Wherein the scanner glass transparent plate 201 is used to support the scanner upper cover 22, and the upper cover 22 has a rack 202 between the two ends of the scanning back and forth walking path; the scanning head 21 mainly contains an optical scanning system and a power source; The shaft 23 straddles the scanning head 21, and is provided with a driven wheel 203 at both ends. The tooth pitch of the driven wheel 203 can match the tooth pitch of the rack 202. The driven wheel 203 is controlled by the power source in the scanning head 21. In order to drive the scanning head 21 to perform linear reciprocating motion between the slide rail 20 and the rack 202, since the driven wheels 203 at both ends of the transmission shaft 23 are locked structures, the driven wheels 203 can be started or stopped synchronously according to the information of the power source, or the driven wheels 203 can be designed as a friction wheel with no tooth pitch, and the rack 202 is also replaced by a track relatively. Such a friction wheel and the track also have the functions of the driven wheel 203 and the rack 202; and the slide rail 20 is the main bearing. Scan head 21 weight member.

Fig. 3 is a sectional view of the utility model, in which a pulley 204 is set at the lower end of the scanning head 21, so that the scanning head 21 can slide freely on the slide rail 20 without derailing, so as to ensure that the scanning head 21 performs linear scanning motion during the scanning process, and slides The rail 20 is fixed on the upper cover 22 by the fixing frame 205, so that the distance between the slide rail 20 and the upper cover 22 is a certain value, and the bearing capacity of the transmission mechanism is strengthened by utilizing the principle that the bearing capacity of the glass transparent plate 201 is better than that of the plastic, so as to avoid In the existing scanner transmission mechanism, due to the environmental temperature and humidity effect, the casing is deformed and retracted, so that the scanned image is affected by the change of the optical path, resulting in image blurring.

At the same time, in order to reduce the noise and vibration caused by the backlash between the driven wheel 203 and the rack 202, a shrapnel 200 is provided at the lower end of the scanning head 21, as shown in FIG. , which can ensure that the scanning head 21, the sliding rail 20 and the upper cover 22 maintain consistent contact during the scanning process, that is, the scanning optical path remains fixed during the entire scanning process, which greatly improves the horizontal vibration of the existing scanning transmission mechanism due to the torque torque generated. The scanned image is affected, causing faults and poor color stacking.

The utility model has the advantages: the above-mentioned scanner transmission mechanism, because of the principle that the bearing capacity of glass is better than that of plastic, strengthens the bearing capacity of the entire transmission mechanism, and uses spring preload design to ensure that the scanning head, sliding The rail and the upper cover maintain consistent contact during the scanning process, which is novel and creative and can be widely used in scanner transmission mechanisms.

Claims (6)

1, a kind of improved scanner gear train consists predominantly of light source, glass transparent plate, scanner head, gear train, it is characterized in that:

Utilize scanner glass transparent plate to support simple scan device loam cake, and should on be placed on scanning and walk back and forth and between the two ends in path tooth bar is arranged;

Mainly contain optical scanning system and power source in the scanner head;

Transmission shaft is across being located at scanner head, and is provided with engaged wheel in two ends, and engaged wheel is controlled by scanner head internally-powered source, uses to drive scanner head in slide rail and tooth bar intercropping straight reciprocating motion;

Slide rail is the member of main carrying scanner head weight, utilizes fixed mount to be fixed in loam cake, makes between this slide rail and the loam cake apart from being certain value;

Utilize glass transparent plate bearing capacity to be better than the principle of plastic cement bearing capacity, strengthen the bearing capacity of whole gear train.

2, a kind of improved scanner gear train as claimed in claim 1, it is characterized in that: the tooth pitch of engaged wheel and rack tooth are apart from matching.

3, a kind of improved scanner gear train as claimed in claim 1, it is characterized in that: the engaged wheel at transmission shaft two ends is the locking-type structure.

4, a kind of improved scanner gear train as claimed in claim 1, it is characterized in that: a pulley is established in the lower end of scanner head, make scanner head can art skating on slide rail and do not derail, guarantee that scanner head carries out the rectilinear scanning campaign in scanning process.

5, a kind of improved scanner gear train as claimed in claim 1, it is characterized in that: a shell fragment is established in the lower end of scanner head, utilize the design of the pre-power of this spring, withstand slide rail, can guarantee the contact that in scanning process, keeps consistency of scanner head, slide rail and loam cake.

6, a kind of improved scanner gear train as claimed in claim 1, it is characterized in that: engaged wheel can be designed to the friction wheel of an anodontia distance, and relatively tooth bar is also replaced by a track.

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