TWI478073B - Barcode scanning device - Google Patents

Description

Bar code scanning device

The invention relates to a barcode scanning device, in particular to a barcode scanning device for receiving barcode images by using a line image receiver.

The barcode scanner scans the bar code of a convenience store or factory, and uses barcodes to control the merchandise or record the price. The conventional bar code scanner mainly uses a point light source emitted from a light-emitting element therein to be converted into a plurality of scanning lines having a specific angle and interval as a light source for scanning a bar code.

However, the scan lines having a certain angle and interval are likely to cause a dead angle on the scan, and if the barcode does not fit the extended scan line, the user must rotate the barcode to search for the scan line that matches the barcode. Taking the bar code leads to an increase in complexity and operation time.

It is an object of the present invention to provide a bar code scanning device that receives a bar code image using a line image receiver and can read a bar code of any angle.

For one purpose of the present invention, the present invention provides a barcode scanning device for scanning a code, the barcode scanner comprising a light source emitter, a line image receiver, a movable reflector, and a a curved mirror group, the light source emitter is configured to illuminate the barcode; the line image receiver is configured to receive the barcode a bar code image after reflection; the movable reflection member is located in front of the line image receiver and moves in a predetermined direction; the curved mirror group is U-shaped with respect to the movable reflection member, and forms a movable direction a first opening in the direction of the reflector; the barcode image is reflected by the curved mirror group and transmitted to the movable reflector, and is reflected by the movable reflector and projected to the line image receiver.

According to an embodiment of the present invention, the movable reflecting member comprises a polygon mirror and a driver coupled to the bottom of the polygon mirror for driving the polygon mirror to rotate at a predetermined rotational speed, the polygon mirror comprising a plurality of reflections The reflecting surfaces cooperate to form a hollow cylinder and are surrounded by the driver.

According to an embodiment of the invention, the movable reflecting member comprises a mirror and a driver coupled to the mirror for driving the mirror to swing back and forth at a predetermined frequency.

According to an embodiment of the invention, the movable reflecting member is disposed on the same horizontal plane.

According to an embodiment of the invention, the barcode scanning device comprises a two-curved mirror group having a gap between the curved mirror groups.

According to an embodiment of the invention, the curved mirror group is located between the linear image receiver and the movable reflective member, and the linear image receiver receives the barcode image reflected by the barcode through the gap.

According to an embodiment of the invention, the light source emitter is located below or above the line image receiver for generating a line type light source, and a light emitting plane of the light source emitter and a receiving plane of the line image receiver Overlapping each other.

According to an embodiment of the invention, the light source emitter comprises a laser diode, a linear light source generating member, and a collimator, the linear light source generating member is located in front of the laser diode, the collimating The instrument is located between the laser diode and the linear light source generating member.

According to an embodiment of the invention, the light source emitter comprises a light emitting diode, a grating, and a linear light source generating member, the linear light source generating member is located in front of the light emitting diode, and the grating is located in the light emitting diode And between the linear light source generating members.

According to an embodiment of the invention, the barcode scanning device further comprises a substrate, the light source generator and the line image receiver are respectively disposed on the substrate and located at different positions, and the light source generator is configured to generate a side light source.

According to an embodiment of the invention, the barcode scanning device further includes a housing, the light source generator and the line image receiver are encapsulated in the housing, the housing is located in the curved mirror group and the movable reflection Between the mirrors, the height of the housing is lower than the set height of the curved mirror group, and the movable reflector is disposed at a height between the set height of the housing and the set height of the curved mirror group.

According to an embodiment of the present invention, the curved mirror group includes a plurality of adjacent mirrors, and any mirror has an angle with an adjacent mirror, and the top of each mirror is opposite to the mirror. The direction of the movable reflector is tilted by a predetermined angle to form a second opening for receiving the barcode image.

The barcode scanning device provided by the invention receives the barcode image by using the line image receiver, and can be used to read the bar code of any angle and achieve the effects of low power consumption and energy saving.

10, 10a, 10b, 10c‧‧‧ barcode scanning device

100‧‧‧Substrate

110, 110b, 110c‧‧‧ light source transmitter

112‧‧‧Laser diode

114‧‧ ‧collimator

116, 119‧‧‧Line light source generating parts

117‧‧‧Lighting diode

118‧‧‧Raster

120, 120a, 120c‧‧‧ movable reflector

121, 221‧‧‧ polygon mirror

121a‧‧‧Mirror

122, 222‧‧‧ reflecting surface

130, 130c‧‧‧ curved mirror group

1300‧‧‧ first opening

1302‧‧‧second opening

132, 232‧‧‧ mirror

140, 140a‧‧‧ drive

150, 150c‧‧‧Line image receiver

160, 160c‧‧‧ shell

A‧‧‧ sports axis

S‧‧ plane

Θ‧‧‧predetermined angle

Φ‧‧‧ angle

Α‧‧‧light emission angle

‧‧‧‧ perspective

Γ‧‧‧bevel

The first figure is a perspective view of a bar code scanner of the first embodiment of the present invention.

The second figure is a cross-sectional view of a bar code scanner of the first embodiment of the present invention.

The third figure is a plan view of a bar code scanner of the first embodiment of the present invention.

The fourth figure is an architectural diagram of a light source generator of the present invention.

The fifth figure is an architectural diagram of another light source generator of the present invention.

Figure 6 is a light path diagram of a bar code scanner of the first embodiment of the present invention.

Figure 7 is a schematic view showing the pattern of the scanning light source of the bar code scanning device of the present invention.

Figure 8 is a plan view of a bar code scanning device in accordance with a second embodiment of the present invention.

Figure 9 is a plan view of a bar code scanner in accordance with a third embodiment of the present invention.

Figure 11 is a cross-sectional view showing a bar code scanner of a fourth embodiment of the present invention.

The above and other objects, features and advantages of the present invention will become more apparent from the <RTIgt;

Referring to the first, second and third figures, respectively, a perspective view, a cross-sectional view and a plan view of a bar code scanning device according to a first embodiment of the present invention. The barcode scanning device 10 is configured to read a barcode 30. The barcode scanning device 10 includes a substrate 100, a light source emitter 110, a movable reflector 120, a two-curved mirror group 130, and a line image receiver 150.

The light source emitter 110 is disposed on the substrate 100 for providing a linear light source to illuminate the barcode 30 (as shown in FIG. 6), and the linear light source must cover all parallel lines of the barcode 30. The light source emitter 110 includes a light emission angle α (as shown in the second figure) The light emission angle α is an angle of expansion of the linear light source during spatial propagation. The constituent structure of the light source emitter 110 can be, for example, but not limited to, shown in the fourth and fifth figures.

Referring to the fourth figure, it is an architectural diagram of a light source emitter of the present invention. The light source emitter 110 includes a laser diode 112, a collimator 114, and a linear light source generating member 116. The linear light source generating member 116 is located in front of the laser diode 112. The collimator 114 is located at The laser diode 112 and the linear light source generating member 116 are disposed. The laser diode 112 generates a beam of light that forms parallel rays after passing through the collimator 114 and enters the line source generating member 116 vertically in a direction in which the line travels. The linear light source generating member 116 can be, for example but not limited to, a lenticular lens, and in the present embodiment, the lenticular lens has a cylindrical shape. The linear light source generating member 116 is for refracting parallel rays incident therein and converting the parallel rays into a linear light source such as a strip of light.

Referring to FIG. 5, it is an architectural diagram of another light source emitter of the present invention. The light source emitter 110 includes a light emitting diode 117, a grating 118, and a linear light source generating member 119. The linear light source generating member 119 is located at the front end of the light emitting diode 117, and the grating 118 is located between the light emitting diode 117 and the linear light source generator 119. The grating 118 is configured to pass parallel rays of light emitted from the LEDs 117 to project parallel rays to the linear light source generating member 119. The linear light source generating member 119 can be, for example but not limited to, a lenticular lens, and in the present embodiment, the lenticular lens has a semicircular arc shape, and a planar portion of the lenticular lens faces the grating 118. The linear light source generating member 119 is for refracting parallel rays incident therein and converting the parallel rays into a linear light source such as a narrow strip.

Referring to the first to third figures, the line image receiver 150 is configured to receive the Bar code image after bar code 30 reflection. The line image receiver 150 has a viewing angle β that must cover all of the parallel lines of the bar code 30; wherein the angle of view β is the angle at which the line image receiver 150 is captured. The light emission angle α of the light source emitter 110 partially overlaps the viewing angle β of the line image receiver 150, and the receiving plane of the line image receiver 150 overlaps with the light emitting plane of the light source emitter 110, such that The line image receiver 150 can receive the bar code image emitted by the light source emitter 110 and reflected by the bar code 30. In this embodiment, the line image receiver 150 is located directly above the light source emitter 110, and the line image receiver 150 and the light source emitter 110 are packaged in the same casing 160, thereby improving the convenience of setting. The receiving plane of the line image receiver 150 is offset from the light emitting plane of the light source emitter 110 when the barcode scanner 10 is subjected to an external force; in actual implementation, the line image receiver 150 and the light source emitter The 110 may not be packaged in the same casing, thereby improving the convenience of the configuration, and the replacement of the damaged component may be performed when the linear image receiver 150 or the light source emitter 110 is damaged.

The movable mirror 120 is disposed on the substrate 100 and is located in front of the line image receiver 110 and moves in a predetermined direction (such as a clockwise direction). The movable mirror 120 includes a polygon mirror 121 and a driver 140. The polygon mirror 121 includes a moving axis A and a plurality of reflecting surfaces 122. The reflecting surfaces 122 cooperate to form a hollow cylinder, and the driver 140 is covered by the periphery. In the embodiment, the polygon mirror 121 includes four reflecting surfaces 122, and the reflecting surfaces 122 are matched to form a four-sided hollow cylinder. In practical implementation, the polygon mirror 121 may include three or more reflections. The surface 122 and the reflecting surfaces 122 are combined to form a multi-faceted cylinder. The driver 140 is coupled to the polygon mirror 121, and a central axis of the driver 140 is substantially aligned with the motion The axis A is used to drive the polygon mirror 121 to rotate at a predetermined rotational speed.

The curved mirror groups 130 are disposed on the substrate 100 and are located at the same level as the movable reflector 120. The curved mirror group 130 is disposed between the linear image receiver 150 and the movable mirror 120, and is arranged in a U shape with respect to the movable reflective member 120, and forms a first opening 1300. The first opening The 1300 is oriented toward the movable reflector 120.

And a gap D (as shown in the third figure) between the curved mirror groups 130, the gap D is for the light to be projected by the light source generator 110 to the movable mirror 120, and the line image receiving The device 150 can receive a bar code image reflected by the movable mirror 120. Each of the curved mirror sets 130 includes a plurality of mirrors 132, and the top ends of the mirrors 132 are inclined toward the line image receiver 150 by a predetermined angle θ (as shown in the second figure) so that a direction is opposite to A second opening 1302 in the direction of the substrate 100. Any of the mirrors 132 has an angle ψ between the adjacent mirrors 132 (as shown in the third figure), and the angles between the mirrors 132 on both sides of the gap D are also included; wherein the angles The tether is adjusted in accordance with the number of the mirrors 132. In the present embodiment, the barcode scanner 10 includes a two-curved mirror group 130, each of the curved mirror groups 130 includes three mirrors 132 connected thereto, and any mirror 132 is coupled to the adjacent mirror 132. The angle ψ is 30 degrees, so that the curved mirror groups 132 are arranged substantially in a U shape. Moreover, the projection length of the movable mirror 120 on a plane S substantially perpendicular to the substrate 100 is smaller than the projection length of the curved mirror group 130 on the plane S, as shown in the second figure.

Referring to the third figure, the linear light source emitted by the light source emitter 110 is projected onto the movable reflective member 120 through the gap D formed between the curved mirror groups 130, and projected onto the movable reflective member 120. The distribution direction of the linear light source is parallel to the Movement axis A. The movable reflecting member 120 that rotates along a predetermined rotational speed reflects the linear light source, and the linear light source is projected onto the reflecting mirrors 132 during the rotation. The movable reflecting member 120 is rotated at a predetermined rotational speed, and the linear light source reflected by the movable reflecting member 120 is projected onto each of the reflecting mirrors 132 according to the rotating direction of the movable reflecting member 120. Wherein, when the movable reflective member 120 is rotated by 90 degrees, the linear light source emitted and projected by the light source emitter 110 can be swept across the six mirrors 132 of the curved mirror group 130, and the curved surfaces are The mirror set 130 is reflected by the second opening 1302 to illuminate the bar code 30, as shown in the sixth figure. In the sixth diagram, only the two mirrors 132 closest to the housing 160 are drawn to illustrate the ray travel path.

By adjusting the rotational speed of the movable reflecting member 120, the linear light sources projected onto the respective reflecting surfaces 132 can be closely arranged. Wherein, when the rotating speed of the movable reflecting member 120 is 2 turns per second, the linear light sources projected onto the reflecting surfaces 132 can be closely arranged. It should be noted that the close arrangement of the linear light sources means that the distance between adjacent linear light sources is extremely small, and optimally, no gap is generated between adjacent linear light sources. Each of the mirrors 132 reflects the linear light source projected thereon, and projects the linear light source to the bar code 30 to illuminate the bar code 30, thereby providing a light source required for reading the bar code 30. Since the gap between adjacent two-line light sources projected on each of the mirrors 132 is extremely small and the appropriate rotational speed of the movable reflector 120 is matched, the pattern of the scanning light source projected onto the barcode 30 is substantially planar. As shown in the seventh figure.

While the bar code 30 is illuminated, the bar code 30 is a reflective portion of the linear light source that produces a code image that is projected onto the six mirrors 132 of the curved mirror group 130. The six mirrors 132 of the curved mirror group 130 reflect the barcode image, and the barcode image is projected onto the movable reflector 120. The movable opposite The shooting component 120 reflects the barcode image, and the barcode image is projected to the line image receiver 150, and is decoded by the line image receiver 150 or the decoder electrically connected to the line image receiver 150 to perform barcode data decoding. .

In summary, the barcode decoder of the first embodiment of the present invention emits a linear light source by the light source emitter 110. The linear light source is sequentially reflected by the movable reflector 120 and the curved mirror group 130 and then projected onto the barcode 30. To provide the light source needed to read the barcode 30. The light reflected by the bar code 30 is sequentially reflected by the curved mirror group 130 and the movable reflector 120, and then received by the line image receiver 150. Since the light emitted by the light source emitter 110 is a linear light source, after the linear light source is reflected by the movable reflective member 120, the rotational speed of the movable reflective member 120 is adjusted to shorten the projection adjacent to each of the mirrors 132. The gap between the two-line source provides a gap-free scanning source. Secondly, since the gap between adjacent two-line light sources projected on the mirrors 132 is extremely small, the light source projected onto the barcode 30 is substantially planar, so that the scanning light source without dead angle is provided and scanned for various directions. Bar code. Moreover, since the light source emitter 110 can provide a linear light source, the rotation speed of the driver 140 that drives the polygon mirror 121 can be reduced, so that the power consumption and the energy saving effect can be achieved, and the service life of the driver 140 can be improved. Moreover, the barcode scanning device 10 can be simultaneously applied to scanning of one-dimensional barcodes and two-dimensional barcodes.

Referring to the eighth figure, a plan view of a bar code scanning device according to a second embodiment of the present invention is shown. The bar code scanning device 10a shown in the eighth embodiment is similar to the bar code scanning device 10 of the first embodiment, and the same elements are denoted by the same reference numerals. It is to be noted that the difference between the two is that the movable mirror 120a of the bar code scanning device 10a shown in FIG. 8 moves in a predetermined direction.

The movable mirror 120a includes a mirror 121a and a driver 140a. The driver The plane 140a is coupled to the mirror 121a to drive the mirror 121a to swing back and forth at a predetermined frequency. The movable mirror 120a has a motion axis A.

The linear light source emitted by the light source emitter 110 is projected to the movable reflector 120a through the gap D formed between the curved mirror groups 130. The distribution direction of the linear light source is parallel to the motion axis A. The movable reflecting member 120a swinging back and forth along a predetermined frequency reflects the linear light source, and the linear light source is projected onto the mirrors 132 during the swinging process. The movable reflecting member 120a is swung at a predetermined frequency, and the linear light source reflected by the movable reflecting member 120a is projected onto each of the reflecting mirrors 132 according to the swinging angle of the movable reflecting member 120a. Wherein, when the mirror 121a is rotated by 90 degrees, the light emitted by the light source emitter 110 and projected thereon is swept across the six mirrors 132 of the curved mirror group 130, and the curved mirror groups are 130 is reflected to illuminate the barcode 30.

By adjusting the swing frequency of the movable reflecting member 120a, the linear light sources projected onto the reflecting surfaces 132 can be closely arranged. It should be noted that the close arrangement of the linear light sources means that the distance between adjacent linear light sources is extremely small, and optimally, no gap is generated between adjacent linear light sources. Each of the mirrors 132 reflects the linear light source projected thereon, and projects the linear light source to the bar code 30 to illuminate the bar code 30, thereby providing a light source required for reading the bar code 30. Since the gap between adjacent two-line light sources projected on the mirrors 132 is extremely small, the pattern of the scanning light source projected onto the bar code is substantially planar, as shown in the seventh figure.

While the bar code 30 is illuminated, the bar code 30 is a portion of the linear light source that reflects the portion, such that a code image is generated, and the bar code image is projected onto the curved mirror group 130. The curved mirror group 130 reflects the barcode image and projects the barcode image onto the movable reflector 120a. The movable reflective member 120a reflects the barcode image to make the The barcode image is projected to the line image receiver 150, and the barcode image data is decoded by the line image receiver 150 or the decoder electrically connected to the line image receiver 150.

In summary, the barcode decoder of the second embodiment of the present invention emits a linear light source by the light source emitter 110. The linear light source is sequentially reflected by the movable reflector 120a and the curved mirror group 130 and then projected onto the barcode 30. To provide the light source needed to read the barcode 30. The light reflected by the bar code 30 is sequentially reflected by the curved mirror group 130 and the movable reflector 120a, and then received by the line image receiver 150. Since the light emitted by the light source emitter 110 is a linear light source, the linear light source is reflected by the movable reflective member 120, and the swing frequency of the movable reflective member 120a is adjusted to shorten the phase projected on each of the mirrors 132. The gap between adjacent two-line sources provides a gap-free scanning source. Secondly, since the gap between adjacent two-line light sources projected on the mirrors 132 is extremely small, the light source projected onto the barcode 30 is substantially planar, so that the scanning light source without dead angle is provided for scanning and reading. Take barcodes in various directions. Moreover, since the light source emitter 110 can provide a linear light source, the swing frequency of the driver 140a that drives the mirror 121a can be reduced, so that the power consumption and the energy saving effect can be achieved, and the service life of the driver 140a can be improved. Moreover, the barcode scanning device 10 can be simultaneously applied to scanning of one-dimensional barcodes and two-dimensional barcodes.

Referring to the ninth drawing, a plan view of a bar code scanner according to a third embodiment of the present invention is shown. The bar code scanning device 10b shown in the ninth embodiment is similar to the bar code scanning device 10 of the first embodiment, and the same elements are denoted by the same reference numerals. It is to be noted that the difference between the two is: the light source generator 110b of the barcode scanning device 10b shown in FIG.

The light source generator 110b is located on the substrate 100 with the line image receiver 150 In the same position, in the embodiment, the light source generator 110b is disposed on the substrate 100. The light source generator 110b is configured to generate a light source to illuminate the barcode 30. The light source generator 110b can be, for example, a light emitting diode, and the number of the light source generators 110b can be one or more depending on the light intensity required by the barcode scanning device.

When the light source is projected onto the bar code 30, the bar code 30 reflects the light source of the portion such that a code image is generated, and the bar code image is projected onto the curved mirror group 130. The curved mirror group 130 reflects the barcode image and projects the barcode image onto the movable reflector 120. The movable reflective member 120 reflects the barcode image, and the barcode image is projected to the line image receiver 150, and is connected to the decoder of the line image receiver 150 by the line image receiver 150 or the barcode. Decoding of data.

Referring to the tenth figure, a top view of a bar code scanner according to a fourth embodiment of the present invention is shown. The bar code scanning device 10c shown in the tenth embodiment is similar to the bar code scanning device 10 of the first embodiment, and the same elements are denoted by the same reference numerals. It is to be noted that the difference between the two is: the movable reflecting member 120c of the bar code scanning device 10c shown in FIG. 10, the curved mirror group 130c, and the arrangement position and the set height of the casing 160c.

The housing 160 is disposed on the substrate 100 with an oblique angle γ, and is located between the movable reflective member 120c and the curved mirror group 130c, thereby being disposed on the light source emitter 110c of the housing 160c. The line image receiver 150c emits light and receives light in the direction of the movable reflector 120c. Next, the height of the housing 160c is smaller than the height of the curved mirror group 130c. The height of the movable reflector 120c is between the housing 160c and the curved mirror group 130c. Furthermore, there is no gap between adjacent curved mirror groups 130c.

Thereby, the linear light source emitted by the light source emitter 110c can pass the movable reverse The shot member 120c and the curved mirror group 130c are sequentially reflected and projected onto the barcode 30, and the barcode image reflected by the barcode 30 can also be sequentially reflected and projected to the curved reflector group 130c and the movable reflector 120c. The line image sensor 120c.

However, the above is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited, that is, the equal changes and modifications made by the scope of the patent application of the present invention should still be covered by the patent of the present invention. The scope of the scope is intended to protect.

10‧‧‧Barcode Scanner

100‧‧‧Substrate

110‧‧‧Light source transmitter

120‧‧‧Multiface mirror

122‧‧‧reflecting surface

130‧‧‧Transformed mirror set

132‧‧‧Mirror

150‧‧‧Line image receiver

160‧‧‧shell

Claims (12)

A bar code scanning device for scanning a code, the bar code scanner comprising: a light source emitter for generating a line type light source to illuminate the bar code, the line type light source must cover all parallel lines of the bar code; the line type image receiver, Receiving a bar code image reflected by the bar code; a movable reflective member located in front of the line image receiver and moving in a predetermined direction; and at least one curved mirror group being U with respect to the movable reflecting member Forming and forming a first opening in the direction of the movable reflecting member, the movable reflecting member and the curved mirror group cooperate to make the pattern of the scanning light source projected onto the barcode substantially planar; wherein the barcode The image is reflected by the curved mirror group and transmitted to the movable reflecting member, and is reflected by the movable reflecting member and projected to the linear image receiver. The bar code scanning device of claim 1, wherein the movable reflecting member comprises a polygon mirror and a driver, and the driver is coupled to the bottom of the polygon mirror for driving the polygon mirror to rotate at a predetermined speed. The polygon mirror includes a plurality of reflecting surfaces that cooperate to form a hollow cylinder and wrap the driver around. The bar code scanning device of claim 1, wherein the movable reflecting member comprises a mirror and a driver coupled to the mirror for driving the mirror to swing back and forth at a predetermined frequency. The bar code scanning device of claim 1, wherein the curved mirror group and the movable reflecting member are disposed on the same horizontal plane. The barcode scanning device of claim 4, wherein the barcode scanning device comprises a two-curved mirror group having a gap between the curved mirror groups. The barcode scanning device of claim 5, wherein the curved mirror group is located between the linear image receiver and the movable reflective member, and the linear image receiver receives the barcode after being reflected by the gap. Bar code image. The bar code scanning device of claim 6, wherein the light source emitter is located below or above the line image receiver for generating a line type light source, and a light emitting plane of the light source emitter and the line image One of the receivers receives planes that overlap each other. The barcode scanning device of claim 7, wherein the light source emitter comprises a laser diode, a linear light source generating member, and a collimator, wherein the linear light source generating member is located at the laser diode In front of the body, the collimator is located between the laser diode and the linear light source generating member. The bar code scanning device of claim 7, wherein the light source emitter comprises a light emitting diode, a grating, and a linear light source generating member, the linear light source generating member is located in front of the light emitting diode, the grating Located between the light emitting diode and the linear light source generating member. The barcode scanning device of claim 1, further comprising a housing, wherein the light source generator and the line image receiver are packaged in the housing, the housing is located in the curved mirror group and the movable Between the mirrors, the height of the housing is lower than the set height of the curved mirror group, and the height of the movable reflector is set between the height of the housing and the set height of the curved mirror group. between. The bar code scanning device of claim 1, wherein the curved mirror group comprises a plurality of adjacent mirrors, and each of the mirrors has an angle with an adjacent mirror, and each of the mirrors The top is oriented opposite to the movable reflector Tilting a predetermined angle to form a second opening for receiving the barcode image. A bar code scanning device comprises: a light source emitter for generating a side light source for illuminating the bar code; a line type image receiver for receiving a bar code image reflected by the bar code; and a movable reflecting member located at the line type a front side of the image receiver and moving in a predetermined direction; and at least one curved mirror group arranged in a U shape with respect to the movable reflecting member and forming a first opening facing the movable reflecting member; a substrate The light source generator and the line image receiver are respectively disposed on the substrate and located at different positions; wherein the barcode image is reflected by the curved mirror group and transmitted to the movable reflector, and is reflected by the movable The piece is reflected and projected onto the line image receiver.