CN201322940Y - Scanning structure capable of adjusting projection light path - Google Patents

Abstract

A scanning structure capable of adjusting projection light path can be applied to a bar code scanner, and comprises an image sensor and a light source device which are arranged on a body, wherein the light source device comprises at least one light source element, at least one light gathering element, a lens and an aperture, the light source element is arranged on the body, the lens and the aperture are in a separated state, the aperture is positioned on the front side of the lens, the lens is positioned on the front side of the image sensor, the light gathering element is arranged on the same adjacent side of the aperture, and the light source element is arranged on the same adjacent side of the lens; the position of the light source element is adjusted to ensure that a projection light path of the light source element can be superposed with an optical receiving reflection path of the lens, and the axis of the lens and the axis of the light source element can have the minimum included angle by the configuration of each element of the light source device, so that the projected scanning visual angle and the optical receiving visual angle can be approximately superposed; the optical signal of the image sensor is enhanced and accurate, the reading speed of scanning is accelerated, and the arrangement of each element of the light source device can reduce the volume of the conventional scanner.

Description

Scanning structure with adjustable projected light path

technical field

The utility model relates to a scanner, in particular to a scanning structure applicable to barcode scanners or related scanners.

Background technique

Barcode scanners are an indispensable input device in business. Almost all products have barcodes. If you use traditional keyboards to input, it is not only easy to make mistakes and the input speed is slow, causing data errors in systems such as customer waiting and inventory. cause commercial loss.

And the laser scanner scanning speed is fast, but the service life is shorter and the long-term use of the laser light source causes eye damage, and the CCD (Charge Coupled Device) barcode scanner (please refer to the No. 4743773, No. 5449892, No. No. 6119939, No. 6729546) though the use of LED light sources will not damage the eyes, but the fact that the reading speed is slow.

Therefore, an improved scanner structure has been produced in the industry. Please refer to Taiwan Patent Announcement No. M314889, and another conventional barcode scanner shown in FIG. 9 . The barcode scanner structure includes a body 80 and a light source mechanism 90, the front end of the body 80 is provided with a light inlet and outlet 81, the light source mechanism 90 is arranged in the body 80, and the light source mechanism 90 is provided with at least one light source 91, at least one focusing rod 92, a lens 93, and a photosensitive receiver device 94 and a reflector 95, the focusing rod 92 is located at the front end of the light source 91, and the distance between the focusing rod 92 and the front end of the light source 91 is greater than about 10 mm, and the photosensitive receiver 94 is located at the front end of the light source 91. The rear of the lens 93; thereby, it is used for reading the data of the barcode (Barcode) to achieve the effects of fast accuracy and labor saving.

But above-mentioned these patent cases and this conventional barcode scanner structure have at least following deficiency:

1. The light source (such as LED) and the spotlight rod are fixed and cannot be adjusted freely. However, since one end of the light source is connected to the light source chip, and the position of the light source chip is related to the projection angle of the projected light line, if the error of the light source chip is downward, If the error of the light source chip is upward, the projected light path will be downward, so that the projected light path and the optical receiving reflection path cannot overlap, resulting in weak and incorrect optical signals received by the optical sensor receiver. The read speed is extremely slow.

2. the lens 93 of this another kind of conventional bar code scanner is convenient to produce and be arranged in this body 80, usually when leaving the factory, be about to be arranged on a lens (LENS), an aperture (STOP) in the housing of this lens 93, the Eyeglass, this aperture are inseparable state, make this lens 93 have certain volume, and this light-condensing rod 92 has the width wider than this light source 91 again, and adjoins this lens 93 sides that volume is larger, and width is wider than this. The light source 91 with the small spotlight rod 92 is not adjacent to any components. The combination and disposition of various components of the light source mechanism 90 leads to an increase in the volume of the light source mechanism 90 , and relatively increases the accommodation space of the body 80 .

However, the scanning structure of the conventional CCD barcode scanner is still not ideal. Based on the concept of continuous product research and innovation, the inventor actively devotes himself to research and development thinking, and through countless actual design experiments, the utility model is produced.

Utility model content

The purpose of the utility model is to provide a scanning structure capable of adjusting the path of projected light.

In order to achieve the above object, the utility model adopts the following scheme:

A scanning structure capable of adjusting the projected light path, comprising: a body; an image sensor disposed on the body; and a light source device disposed on the body, comprising at least one light source element and at least one light-condensing element, the light source element is Activities are set on this ontology.

The light source device includes a lens and an aperture, and the lens and the aperture are separated.

The aperture is located on the front side of the lens, the lens is located on the front side of the image sensor, the light collecting element is arranged on the same adjacent side of the aperture, and the light source element is arranged on the same adjacent side of the lens.

The body is assembled with a cover body, and the cover body is provided with at least one through hole, and the light source element is loosely fit through the cover body through hole.

The body is assembled with a cover body, and the cover body is provided with at least one adjustment hole.

The body is assembled with a circuit board, and the circuit board is provided with holes corresponding to the adjustment holes of the cover.

The light source element is provided with elastic pins, and the pins are movable through the main body.

The body is provided with partitions for setting the light source device.

Corresponding slots are provided on the partition board and the inner wall of the main body for setting the light concentrating elements.

After adopting the above scheme, the utility model has the following advantages:

1. The light source element is set on the body in an active state, so that the position of the light source element can be adjusted. After adjustment, the projected light path of the light source element can coincide with the optical receiving reflection path of the lens, so that the optical signal of the image sensor can be enhanced. And accurate, speed up the reading speed of the scan.

2. The lens and the aperture of the utility model are in a separated state, and the components of the light source device are arranged such that the light-gathering element with a larger width is placed on the same adjacent side of the aperture with a very small width, and the light source with a smaller width than the light-gathering element The components are arranged on the same adjacent side of the lens wider than the aperture, so that the size of the conventional scanner can be reduced, thereby saving manufacturing cost and improving the convenience of operation.

3. In the present invention, because the light source element is arranged on the same adjacent side of the lens, the axis of the lens and the axis of the light source element can have the smallest angle θ, so that the scanning angle R1 projected by the light source element is in line with the optical angle of the lens. The receiving angles of view R2 can be close to overlapping, so that the optical signal of the image sensor can be enhanced and accurate, and the reading speed of scanning can be accelerated.

In the following, a detailed description will be made with reference to specific embodiments and accompanying drawings.

Description of drawings

Fig. 1 is the perspective view of the utility model;

Fig. 2 is a three-dimensional exploded view of the utility model;

Fig. 3 is the upper sectional view of the use embodiment of the utility model;

Fig. 4 is a partial cross-sectional view of an example in which the light source element of the present invention can be adjusted;

Fig. 5 (a), Fig. 5 (b) is the schematic diagram that the projected light path of the light source element of the present invention is adjusted;

Fig. 6 is a schematic diagram showing that the scanning angle of view of the light source device of the present invention and its optical receiving angle of view tend to overlap;

Fig. 7 is the three-dimensional view of the utility model assembly circuit board;

Fig. 8 is a partial cross-sectional view of an example in which the light source element of the structure shown in Fig. 7 can be adjusted by means of tools;

Fig. 9 is a top sectional view of a conventional barcode scanner.

Description of main component symbols

10 Body 11 Accommodating space 12 Transmission part

13 partitions 131 card slots 14 storage slots

15 Card Slots 16 Covers 161 Perforations

162 adjustment holes 17 circuit board 171 holes

20 image sensor 30 light source device 31 light source element

311 pins 32 concentrating elements 33 lenses

34 apertures 40 tools 80 bodies

81 light import and export 90 light source mechanism 91 light source

92 spotlight bar 93 lens 94 light sensor receiver

95 reflector

Detailed ways

Please refer to Fig. 1, Fig. 2, Fig. 3, and Fig. 4, the utility model can be applied to barcode scanners or related scanners, which can quickly and accurately interpret scanned data (such as barcodes, Barcode), which includes There is a main body 10, an image sensor (CCD ImageSensor) 20, and a light source device 30, and the scanning principle of a conventional CCD barcode scanner is known, and will not be described in detail here. The following will be described in detail:

The main body 10 is provided with an accommodating space 11, and the front end of the main body 10 is provided with a transmissive part 12 for light to enter and exit. The main body 10 is provided with two partitions 13 to form two accommodating grooves 14, between the partitions 13 and The inner wall of the main body 10 is provided with corresponding slots 131 and 15, through which the partition plate 13, the slots 131 and the slots 15 are used to set the relevant components of the light source device 30; A cover body 16 is assembled at the place, and the cover body 16 is provided with several perforations 161 and two adjustment holes 162 .

The image sensor (CCD Image Sensor) 20 is arranged on one side of the main body 10 to receive the reflected light during scanning to interpret the scanned data.

The light source device 30 is arranged on the body 10, and it includes two light source elements (such as LED) 31, two light concentrating elements (Light Bar) 32, a lens (LENS) 33, and a diaphragm (STOP) 34, and the light source element 31 is arranged on the In the accommodating groove 14 of the main body 10, the two pins 311 provided for the light source element 31 are loosely fit through the hole 161 of the cover body 16. The pins 311 have a predetermined elasticity, whereby the light source element 31 can be in an active state. Set on the body 10; the lens 33 and the aperture 34 are separated, the lens 33 is located on the front side of the image sensor 20, and can be clamped by the partition 13, and the aperture 34 is locked on the partition 13 and is located on the front side of the lens 33, that is, the aperture 34 with the smallest optical path faces the side of the data to be scanned, and the aperture 34 can be snapped and fixed between the partitions 13, and the concentrating element 32 can be a column The face mirror is located between the main body slot 15 and the partition slot 131 and is located on the same adjacent side of the aperture 34 , and the light source element 31 is located on the same adjacent side of the lens 33 .

From the above-mentioned structure, because the light-condensing element 32 with a larger width is arranged on the same adjacent side of the aperture 34 with a very small width, the light source element 31 with a smaller width than the light-condensing element 32 is arranged on a lens wider than the aperture 34. 33 are on the same adjacent side, so by properly disposing the components of the light source device 30, the volume of the conventional scanner can be reduced, thereby saving manufacturing cost and improving the convenience of operation.

Please refer to Figure 4, Figure 5(a), and Figure 5(b). As far as the conventional scanning structure is concerned, if the error of the light source wafer (not shown in the figure) used to assemble the light source is downward, the light source will be downward. , that is, the projected light line L1 is upward, if the error of the light source chip is upward, the light source will be upward, that is, the projected light line L2 is downward, so that the projected light lines L1, L2 and the optical receiving reflection line cannot overlap. Because the light source element 31 is set on the cover body 16 of the body 10 in a movable state, the position of the light source element 31 (such as up and down displacement) can be adjusted first and then installed on the light source chip to adjust the projected light line L3 of the light source element 31 It can coincide with the optical receiving reflection line of the lens 33, so that the optical signal of the image sensor 20 can be strengthened and accurate, and the reading speed of scanning can be accelerated.

Please refer to Fig. 3 and shown in Fig. 6, because the light source element 31 of the present invention is arranged on the same adjacent side of the lens 33, the axis of the lens 33 and the axis of the light source element 31 have the smallest angle θ, thereby making the The scanning viewing angle R1 projected by the light source element 31 and the optical receiving viewing angle R2 of the lens 33 can be close to overlap, so that the optical signal of the image sensor 20 can be enhanced and accurate, and the reading speed of scanning can be accelerated.

Referring to Fig. 7 and Fig. 8, a circuit board 17 for setting the relevant circuits of the scanner can be assembled on the body 10 of the present invention. through the hole 171, and the pin 311 of the light source element 31 can be soldered to the circuit board 17 after passing through the hole 161 of the cover body 16; The pin 31 of the light source element 31 has predetermined elasticity and can be deformed and fine-tuned. The adjustment hole 162 of the cover body 16 can be directly pierced by the rod-shaped tool 40 to fine-tune the up and down position of the light source element 31 .

The above is the embodiment cited in this case, which is only for convenience of explanation, and should not limit the meaning of this case, that is, all kinds of transformation designs made according to the listed patent scope should be included in the patent scope of this case.

Claims (9)

1. A scanning structure that can adjust the projection light path, including: a body; and an image sensor, located on the body; and A light source device is set on the body, including at least one light source element and at least one light-gathering element, and the feature is that the light source element is movably arranged on the body. 2. The scanning structure capable of adjusting the projected light path as claimed in claim 1, wherein the light source device includes a lens and an aperture, and the lens and the aperture are separated. 3. The scanning structure capable of adjusting the path of projected light as claimed in claim 2, wherein the aperture is located at the front side of the lens, the lens is located at the front side of the image sensor, and the condensing element is arranged on the same adjacent side of the aperture , the light source element is arranged on the same adjacent side of the lens. 4. The scanning structure capable of adjusting the projected light path according to claim 1, characterized in that: the main body is assembled with a cover body, and the cover body is provided with at least one perforation, and the light source element is loosely fitted through the cover body perforation hole . 5. The scanning structure capable of adjusting the projected light path as claimed in claim 1, characterized in that: the main body is assembled with a cover body, and the cover body is provided with at least one adjustment hole. 6. The scanning structure capable of adjusting the path of projected light as claimed in claim 5, wherein a circuit board is assembled on the body, and the circuit board is provided with holes corresponding to the adjustment holes of the cover body. 7. The scanning structure capable of adjusting the path of projected light as claimed in claim 1, wherein the light source element is provided with elastic pins, and the pins are movable through the main body. 8. The scanning structure capable of adjusting the path of projected light as claimed in claim 1, wherein the main body is provided with a partition to install the light source device. 9. The scanning structure capable of adjusting the path of projected light as claimed in claim 8, characterized in that: the partition board and the inner wall of the main body are provided with corresponding slots for setting light-condensing elements.

Images