TWI227861B - Scanning device and method of laser barcode reader - Google Patents

Abstract

A scanning device of laser barcode reader comprises a ring reflection mirror set that is composed of multiple reflection mirrors formed as a ring with an inclination angle on a base enclosure, a rotary multi-face reflection mirrors installed at the center location of the ring reflection mirror set, and more than two laser diodes installed as a ring with equal distance over the locations near the boundary of circumference of the ring reflection mirror set, wherein each laser diode can be controlled by a clock control device. The laser beams driven by the laser diodes can be projected on one of the mirror of the multi-face reflection mirrors. The multi-face reflection mirrors further project the laser beams to several reflection mirrors of the ring reflection mirror set. Lastly, several reflection mirrors of the ring reflection mirror set generate omni-directional scan laser beams to project on the targeting barcode.

Description

1227861 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a scanning device and method for a laser bar code reading device, a special laser bar code reading device, and a scanning laser light projected onto a target to be scanned. Barcode. Birth of the King [Previous Technology] ^ Bar code reading devices have been widely used in various fields in department stores, supermarkets, merchandise sales *, things: two: Bar code reading devices have been widely used as electronic auxiliary equipment, Γ:; 1 device It can help the staff to be fast and effective; the price of product t and other product information 'cooperate with the computer's calculations; r can save manpower, improve work efficiency, and automatically require an optical device for a reader, which was disclosed in 2375- Laser barcode mirror, -d includes a laser light source,-curved surface reflection-drive device = set before the laser light source to vibrate with the curved surface mirror = time = mirror refracts the laser beam so that it forms a direction-segment Straight line light spot U :: enters the curved mirror to collect money:-; induction scanning gradually ϊ; :: reading technology from the early simple previously known 纟 azimuth bar 4 to a full range of bar code reading technology. In the barcode reading and reading technology, there are various designs. 1227861 V. Description of Invention (2) Design. Refer to the first figure, which is a perspective view showing the configuration of the relevant components of one of the conventional omnidirectional bar code reading devices, and the second figure is a cross-sectional view showing the 2-2 cross section in the first figure. The conventional omni-directional bar code reading device is mainly formed with a laser diode receiving seat 11 at one side end of the base casing 1 for configuring a laser diode 2 (laser diode). A convex groove chamber 12 is provided on the top of the laser diode accommodating seat 11, and a first reflecting lens 31 can be accommodated obliquely in the inside thereof. A mirror group accommodating chamber 13 is formed at a position adjacent to the raised groove chamber 12, and a first groove 1 31 is formed on a side facing the raised groove chamber 12, and is formed in a direction facing the front side. There are second slots 132. A second reflection lens 32 and a third reflection lens 33 are arranged in the mirror group accommodation chamber 13. The first reflection lens 31, the second reflection lens 32, and the third reflection lens 3 3 are arranged at an oblique angle according to the reflection angle of the laser light, so that the laser light emitted by the laser diode 2 (Laser Beam) can be projected from the second slot 1 3 2 of the lens group accommodating chamber 13 through the first reflection lens 31, the second reflection lens 32, and the third reflection lens 33 respectively. A polygon mirror 4 (Polygon Mirror) and a ring-row mirror group 5 are arranged at the other end of the base casing 1. The ring-row mirror group 5 is arranged between the polygon mirror 4 and the aforementioned one. The third mirrors 33 are between and are adjacent to the polygon mirror 4. A motor 41 is connected to the bottom of the polygon mirror 4 and can be driven by the motor 41 to rotate. The third figure shows the optical path diagram of the polygon mirror of the conventional omnidirectional bar code reading device at one rotation angle, and the fourth figure shows the polygon mirror of the traditional omnidirectional bar code reading device at another rotation Schematic diagram of the optical path at an angle. It shows the laser light emitted by laser diode 2.

1227861 V. Description of the invention (3) After passing the first reflecting lens 31, the second reflecting lens 32, and the third reflecting lens 33 in sequence, a laser light L11 is projected from the third reflecting lens 33 to the polygon mirror One of the mirror surfaces corresponding to 4 is used by the polygon mirror 4 to project the laser light as a reflected laser light L1 2 to one of the reflective lenses of the ring mirror group 5. Finally, a scanning laser light can be projected to a target stone horse (not shown) by the reflection of the reflection lens of the ring mirror group 5 to scan and read the barcode. Since the polygon mirror 4 is driven by the motor 41, the laser light 11 is projected toward the polygon mirror $ by one of the mirrors of the polygon mirror 4 at different projection angles. The other reflecting lens (shown in the fourth figure) projected onto the ring mirror group 5 can generate a bar code that scans laser light to a target, and performs a full range of bar code scanning functions. As for the light collection, the laser light reflected by the target bar code sequentially generates the received laser light from the ring-row mirror group 5, the polygon mirror 4, and the third reflecting lens 33 from the reverse path of the optical path. Finally, a focusing lens 34 disposed inside the base housing 1 is focused and projected onto a light sensing element (such as a photo diode) at an appropriate position on the bottom of the base body 1 to receive the receiver. The light laser shoots the light and cooperates with a message to interpret the barcode. Ji Yelu = In addition to the aforementioned traditional omnidirectional bar code reading device design, there are two types of t design. For example, in the Republic of China New Patent Bulletin No. 1, a type of omnidirectional and scanned bar code reading device is disclosed. In the previous patents, they mainly included the first source of the field laser device, which is used to provide the field, and a scanning device to receive the aforementioned laser light and control it.

1227861 V. Description of the invention (4) Only one laser light can pass through and be scanned in a circle at any time; a plane mirror group device, which is arranged in a circular shape by plane mirrors of multiple arrays, and no, multiple arrays of tilt angles A flat mirror is used to reflect the aforementioned laser light for circular scanning, and the reflected scanning line is projected to the object to be scanned for continuous scanning; a light detector device is used to detect that the object to be measured is continuously scanned The light reflected afterwards converts the optical signal into an electrical signal; and "an aluminum processing device, which is used to receive the aforementioned electrical signal and pass it to the decoder for decoding. The king said that Ding [invented the invention in drinking, reading, light projection, and other related miscellaneous. This is not good for this need '~ The components are reflected in parallel and only the projected content is required] The technical problems to be solved The aforementioned conventional barcode scanners have a better space between the reading angle of the barcode and the restricted components between the target barcode Correspondence 1 status is not set for bar code reading. Due to the assembly space of the conventional bar code reading components, the cost is higher, and the optical calibration is also more optical. As the mirror group is receiving two Reflective lens is able to use this ^ 'so in the optical effect drawing technology of the mirror' Although the effect is all-round and less subject to laser, but the number of components, and the optical path of its composition are more complex. In terms of reduction, the components of the extremely split composition are complicated, and the assembly of the product is not easy and difficult. When the laser light projected by the ring in the conventional bar code reading device, the direction of the direct light toward the target bar code is also not ideal.

1227861 V. Description of the invention (5) Therefore t " " " " " " " " " " " " " — Improvement, "Should read the disadvantages of traditional bar code reading with the help of"? " Give the device “Ming II: The Master” is to provide-a kind of laser bar code smelling mirror and ring array ^ f 射 # mirror group with a rotatable ^ multi-hearted field shot a polar body and can be reflected to the Lunxi surface reflective projection effect. Optimized and Simplified Laser Scanning of another code reading device of the present invention: Yes; the simple structure of the laser strip design is extremely streamlined, so that the “cost reduction” of the light path of the barcode is extremely effective, And the reduction in production is simple. The laser bar code is relatively relatively assembling: the installation effect: the mirror ... area mirror arrangement, we can get the technical solution 2 of the present invention to solve the problem of the conventional technology The adopted technical means is a bar-shaped mirror set placed in the base body of the barcode reading device. II: At least four reflective lenses are formed on a base set at an oblique angle and arranged on the base. At the center of the mirror group, a rotatable evening mirror is arranged, and at least two laser diodes are arranged in a circle at an equal interval in the vicinity of the outer periphery of the annular mirror group. The polar body can be controlled by a timing control device. The driven laser diode 1227861 V. Description of the invention (6) The laser light generated by the body can be projected to the mirror surface of the polygon mirror, and then by the polygon mirror Laser The light is projected on the reflective lenses of the ring mirror group, and finally, the reflective lenses of the ring mirror group are used to generate an all-directional scanning laser light projected onto the target barcode.

In a preferred embodiment of the present invention, the polygon mirror of the scanning device of the laser barcode reading device has a large area top surface and a small area bottom surface, and between the corresponding side edges between the top surface and the bottom surface That is, a reflecting mirror surface is formed, and each reflecting mirror surface substantially faces the reflecting lens of the ring mirror group, so that the laser light received by the mirror surface of the polygon mirror can be projected to a plurality of the ring mirror group. Reflective lenses. The timing control device includes at least one photocoupler and a photocoupler trigger baffle disposed at an appropriate position of the polygon mirror. The touch signal generated by the photocoupler is used to activate one of the laser diodes. The laser diode is driven for exactly one revolution of the polygon mirror. Compared with the effect of the prior art, the present invention can make the design of the simplified laser light projection effect path of the laser bar code reading extremely simplified and the cost reduction is relatively simple. In reflection, the ring mirror set includes a scan projected by a surface mirror, so in fact, 2 scanning devices of the reading device can be optimized and the most effective through the technical means adopted by the present invention. The overall number of components and the simplicity of the light make the volume reading surface of the bar code reading device extremely advantageous, and in terms of product assembly and the optical effect of the mirror, in the present invention, since there are at least four or more reflective lenses, more The position of the laser light is between two and two

1227861 V. Description of the invention (7) ϋ, the optical effect of the mirror, this effect is far better than the traditional laser ^ 顼 I effect.蚂 条 Mao Yue [Embodiment] As shown in the fifth figure of 2 broadcasts, it shows the three-dimensional decomposition of the relevant components of the laser strip scorpion of the present invention: #setting = ::, each scanning device of the reading device The basis of related components: = 糸 shows the schematic diagram of the top view configuration of the laser diode, the polygon mirror, and the mirror group in the present invention. A ¥ shape As shown in the figure, the scanning of the laser barcode reading device of the present invention is arranged at a predetermined position of a base casing 1 with a ring-shaped mirror group g, which is composed of a plurality of reflective lenses. The ring-row mirror group may include at least four or more reflection lenses, and each reflection lens is adjacent to each other in a ring = ring-shaped mirror group structure. In the preferred embodiment shown in the figure, the ^ ring mirror group 6 is composed of eight reflection lenses 6a, 6b, 6c, 6d, 6e, "6f, 6g, 6h, and each reflection The lenses are all formed at a predetermined inclination angle ring row at a predetermined position of the base housing 1. 疋 At the center of the ring row mirror group 6, a polygon mirror 7 (Polygon) is provided, and Driven by a motor 71. The polygon mirror 7 includes at least two mirror surfaces. In the preferred embodiment shown in the figure, the polygon mirror 7 has four mirror surfaces 7a, 7b, 7c, 7d. And the polygon mirror 7 has a large area top surface and a small area bottom surface, and a reflective milling surface 7a, 7b, 7c, 7d is formed between the corresponding side edges between the top surface and the bottom surface, and Make each mirror surface 7a, 7b, 7e, 仞

$ 11Page V. Description of the invention (8) The reflecting lens substantially facing the ring mirror group, so that the laser light received by the reflecting surface of the polygon mirror I, 7b, 7c, 7d can be projected far away Eight reflection lenses 6a, 6b, 6c, 6d, 6e =, 6f, 6S, 6h in the ring mirror group 6. f At the vicinity of the outer periphery of the ring mirror group 6, two or more laser-poles are arranged, for example, four laser diodes 8a, 8 =, 8c, and 8d are adjacent to each other. The laser diodes 仏, 、, 8c, and 8d are arranged at equal intervals and are arranged at outer peripheral positions of the ring mirror group 6. The respective field-shooting polar bodies 8a, 8b, 8c, and 8d are arranged at the bottom space positions of the reflection lenses 6a, 6b, 6c, 6d, 6e, 6f, 6g, and 6h of the ring mirror group 6. See also the ninth figure As shown). Adjacent to the ring mirror group and 1 should be at the positions of the laser diodes 8a, 8b, 8c, and 8d, a reflective lens 81a, 8lb, 81c, and 81d is arranged at f to separate each laser light = The laser light generated by j-body 8a, 8b, 8c, 8d passes through the reflection, respectively: =, 81, 81. , 81 (1) is projected onto the multi-faceted mirror surface. "= To control the on / off state of the laser diodes 8a, 8b, 8c, 8d = unavailable. Therefore, the present invention further includes a timing control device, It is used to sequentially drive κ :: n8a: 8b, 8c, 8d to generate laser light, and there are eight laser diodes driven in the same-^ to generate laser light. Silicon 8 # control device may include at least A light coupler 72 and a light coupler at the appropriate position of 12 and 7 touch the stopper. Whenever the multi 7 touch stopper 73 touches the light coupler, it can be generated by the light coupler 72-a sequence of touches 1227861 V. Description of the invention (9) L 5 tiger S8a S8b, S8c, S8d, and the touch signal S8a, S8b, S8c, S8d f can be used to control the laser diode 8a with the control of a control circuit (not shown) One of A, 8b, 8c, 8d. The eight diagrams show the timing diagrams of the touch signals S8a, S8b, S8c, and ⑽, and the k sequence diagram shows' Each laser diode is driven on ( hr1: 0 :) and the time T1 when the laser light is generated is exactly one revolution of the polygon mirror 7 m '. When the next optical coupler trigger signal is received, the first-driven one ~ Tu rn_〇n), the laser diode is turned off immediately (Turn_off), and the next laser f pole is turned on immediately (TUrn-on), until each ϊΐ: the polar body is fully driven (ie, a cycle time T2). ^ The timing control device T: P, +, 4 Α In addition to the structure of the moving baffle, the coupler and the light and light coupler are touched to control: the remote laser diodes 83, 8, and 8. , 8 (1 in order to start. M ΐ ΐ ΐ ΐ 显示 显示 显示 显示 极 显示 显示 显示 显示 显示 显示 显示 显示 显示 显示 本 显示 本 本 本 本 显示 本 本 本 本 本 本 本 显示 本 显示 The laser diode It shows that the laser diode (for example, laser diode 8a) Ιίίίΐ ▲ Light passes through the corresponding reflecting lens (for example, the reflecting lens is directed toward the mirror surface of the polygon mirror 7 (for example, mirror surface 7a) ί6 :) Λ The reflecting lens in the Λ-shaped reflection I group 6 (for example, ^ ^ 9 " The reflection lens in the helical shape mirror group 6 projects the sweep field 7 and outwards, and can generate a comprehensive scanning laser light pattern (Scan two shots to the target bar code, and then read a bar code of 4 with a light receiving device. As for the technology of the light receiving device, the same application

1227861 V. Description of invention (10) '' 'Another patent application is pending. In addition, because the scanning laser light pattern projected by the ring mirror group 6 is not repeated, the incident angle of the laser light generated by each laser diode on the mirror surface of the far polygon mirror 7 is 0. All are different. For example, in the optical path diagram shown in Figure 9, the incident angle of the laser light generated by the laser diode 8a and the incident angle of the laser light generated by the other laser diode 8e can pass through the light 2 The point adjustment arrangement (such as adjusting the positions or angles of the mirrors 8 1 a, 8 1 c) so that the incident angle of the laser light generated by each laser diode is different. It can be known from the above embodiments that the ring mirror group 6 in the present invention includes at least four reflective lenses, so the position of the scanning laser light projected by the polygon mirror 7 is between two and two. , So you can actually get more than twice the effect of the mirror. The number of structural components and the design of the optical path are extremely precise. Second, the reduction of the volume and cost of the reading device is extremely advantageous, and it is relatively easy to assemble the product. The scanning device and method of the accurate bar code reading device have been improved, and have improved the efficacy of Yushu significantly. It can be described as the 5th embodiment of the month, and other improvements and changes can be made. The above embodiments illustrate the various improvements and changes made, but these are still within the scope of the patents defined in the embodiments of the present invention. Tian belongs to the spirit of the present invention and a simple explanation with 1227861 diagrams _ [Simplified diagrams] _ The first diagram is a perspective view showing the configuration of the relevant components of a traditional omnidirectional bar code reading device; the second diagram is a diagram showing 2 in the first diagram -2 is a cross-sectional view; the third figure shows the optical path diagram of the polygon mirror of the conventional omnidirectional bar code reading device at one of the rotation angles in the first picture; the fourth picture shows the traditional omnidirectional bar code reading in the first picture Schematic diagram of the optical path of the polygon mirror of the device at another rotation angle; the fifth figure shows the configuration of the laser diode, polygon mirror, and ring mirror group of the scanning device of the laser barcode reading device of the present invention A three-dimensional exploded view of a base housing 0; the sixth figure shows the laser diode, the polygon mirror, and the ring mirror group of the scanning device of the laser barcode reading device of the present invention are arranged in a base housing A perspective view of the body; the seventh diagram is a schematic view showing the top-view configuration of the laser diode, the polygon mirror, and the ring mirror group of the present invention; the eighth diagram is a laser bar of the present invention Timing chart of the touch signal of each laser diode in the scanning device of the reading device; The ninth figure is a schematic diagram showing the side view configuration of the laser diode, the polygon mirror, and the ring mirror group and the optical path diagram of the present invention . Explanation of each component symbol in the figure: 1 base housing 11 laser diode receiving seat 12 raised groove chamber

Page 15 1227861

Brief description of drawings on page 16 13 Mirror housing room 131 First slot 132 Second slot 2 Laser diode 31 First reflective lens 32 Second reflective lens 33 Third reflective lens 34 Focusing lens 4 Polyhedral reflection Mirror 41 Motor 5 Ring Column Mirror Group 6 Ring Column Mirror Group 6a, 6b, 6c, 6d Reflector 6e, 6f, 6g, 6h Reflector 7 Polyhedron Mirror 71 Motor 72 Photocoupler 73 Light Coupler Actuator 7a, 7b, 7c, 7d Mirror 8a, 8b, 8c, 8d Laser diodes 81a, 81b, 81c, 81d Reflective lenses S8a, S8b 'S8c, S8d Touch signals Lll, L12, L2 Scanning laser light 0 1, 0 2 angle of incidence

Claims (1)

1227861 VI. Scope of patent application1. A laser bar code switch * Scanning pattern projection scanning device 'used to generate a full range of a base housing; the bar code, the scanning device includes: seat = multiple reflective lenses to An inclination angle two reflectors, which are arranged in the position and position of each reflection lens of the ring mirror group, and can be driven by a motor to rotate; two, two or more laser diodes, equally spaced ground rings The columns are arranged near the outer periphery of the ring mirror group; The laser light generated by the driven laser diode can be projected onto one of the mirror surfaces of the polygon mirror t, and then the laser light is projected by the polygon mirror onto a plurality of reflective lenses of the child-shaped mirror group, Finally, a plurality of reflective lenses of the ring-shaped mirror group generate an omnidirectional scanning laser light to project onto the target barcode. For example, the scanning device of the laser bar code reading device in the first patent application range, wherein the ring mirror group includes at least four mirror lenses, and each of the reflection lenses is adjacent to the ring row to form a ring-shaped mirror. Group 0 3 · The scanning device of the laser barcode reading device according to item 1 of the patent application range, wherein the polygon mirror includes at least three mirror surfaces. 4 · Scanning equipment such as the laser barcode reading device in the scope of patent application 1227861 6. The scope of the patent application is set, in which the polygon mirror has a larger area of the top surface and a smaller area of the bottom surface, a reflecting mirror surface is formed between the corresponding side edge between the top surface and the bottom surface, and each The reflecting mirror surface substantially faces the reflecting lens of the ring mirror group, so that the laser light received by the mirror surface of the polygon mirror can be projected to the reflecting lenses of the ring mirror group. 5. The scanning device of the laser barcode reading device according to item 1 of the patent application scope, wherein each laser diode system is disposed at the bottom space position of the reflection lens of the ring mirror group, and adjacent to the ring mirror At the position of the reflective lens of the group, a reflective lens is arranged for projecting the laser light generated by the laser diode through one of the reflective lenses to one of the mirror surfaces of the polygon mirror. 6 · If applying for the patent scope No. 1 顼 $ φ # $ ， i ^ ϋ The scanning control device of the laser bar code reading device is used to sequentially drive each laser pole to generate laser light, and the same diode driven. ] Only one of the laser 7. The laser barcode reading device as described in item 6 of the patent application scope, wherein the timing control device includes at least a #coupler installed in an appropriate position of the polygon mirror and a The touch signal generated by the coupler is used to start; J touch = sheet, the light is one week. Ma Xi face mirror rotation 1227861 Six, the scope of patent application! • If the scope of patent application is the first! The laser device of the item, in which the incident angle of the mirror surface of the scanning surface mirror of the scanning device of each laser diode code reading device is all raw, the laser light is incident on the scanned laser light patterns projected by the plurality of groups In order to avoid the ring mirror. The scanning pattern of the laser bar code reading device is projected onto a standard bar code. It is used to generate a full range including a ring column mirror group. The oblique angle ring row is formed on a base shell, and a plurality of reflection lenses are arranged at a tilted center position to be rotatable, and the outer ring of the ring row mirror group is adjacent to the i $ two reflecting mirrors. The annular reflection (a) drives the polygon mirror to rotate; (Production b) :: The trigger signal of the ejection / production △ sequentially drives the laser diode ^, and only one of the laser diodes is driven at the same time. The laser diode: laser diode The driven time is exactly the time of one facet inversion; ^ (C) the laser light generated by the driven laser diode is projected to the evening mirror; (d) the polygonal mirror is used to drive the laser The light is projected on the reflective lenses of the ring mirror group; (e) the laser light is projected by the reflective lenses of the ring mirror group in the direction of the target bar code to generate an all-directional scanning laser light scan Page 19, 127861 6. The patent application applies to describe the subject barcode I 〇 · If the laser barcode reading and loading method of item 9 of the patent application scope, the scanning side of Φ cattle, + 罝 = the trigger signal in the middle step 系The light coupler at the appropriate position of the light coupler touches the stop to become the touch signal generated by the b light coupler to drive it ^ — 'a = limb, each laser diode is driven at exactly the same time For more] 22 to 22 a week. Surface Mirror Square II: Scanning commentary of the laser barcode reading device in item 9 of the patent application. In step (C), the laser diode system is set on the bottom of the reflective lens of the ring mirror group J. Space position, and at the position adjacent to the reflection lens of the ring lens group, a reflection lens is arranged, and the laser light generated by the laser diode is reflected by the reflection lens and then projected to the polygon mirror Mirror. Page 20