A projection type bar code scanner

Abstract

The application relates to the technical field of scanners, and discloses a projection type bar code scanner which comprises a transmission table, scanning mechanisms fixedly connected to the two sides of the transmission table, a clamping mechanism fixedly connected to the top of the scanning mechanism, and an adjusting mechanism fixedly connected to the bottom end of the clamping mechanism. The gear assembly comprises vertical plates, two vertical plates are fixedly connected to the front and rear sides of the transmission table, a tooth bar is rotationally connected to the inside of the top end of one side of each vertical plate, first gears are fixedly connected to the surfaces of the two sides of the tooth bar, second gears are fixedly connected to the two ends of the tooth bar, and vertical racks are meshingly connected to the surfaces of the first gears. The projection type bar code scanner is provided with the scanning mechanism, so that the clamping plate connected to the scanning mechanism can clamp workpieces when moving, and the label on the workpiece can be automatically aligned at a position below the scanning equipment, thereby facilitating the scanning operation of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of scanner technology, specifically to a projection barcode scanner. Background Technology

[0002] Projected barcode scanners are devices that efficiently read 1D, 2D, and mobile phone barcodes. These scanners use projected light to illuminate the barcode and then identify the information by receiving the reflected light. The design of projected barcode scanners allows them to adapt to various environments and working conditions, providing reliable solutions for both compact and powerful scanning devices and scenarios requiring efficient barcode reading.

[0003] According to the projection barcode scanner disclosed in announcement number CN204143453U, at least one barcode scanner is installed at a height above a work platform in a workspace.

[0004] Although the projection barcode scanner can read the barcode on the surface of the object by its image sensor and generate barcode information that is transmitted to the main controller via a signal transmission line, it is not convenient to automatically align the label on the workpiece with the scanning device, and therefore it is not convenient to adapt to the clamping size adjustment of workpieces of different sizes. Therefore, the device needs to be improved accordingly. Summary of the Invention

[0005] The purpose of this invention is to provide a projection barcode scanner to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a projection barcode scanner, including a transmission table, scanning mechanisms fixedly connected to both sides of the transmission table, a clamping mechanism fixedly connected to the top of the scanning mechanism, and an adjustment mechanism fixedly connected to the bottom of the clamping mechanism; The scanning mechanism includes a gear assembly and a locking assembly, with the locking assembly disposed on one side of the gear assembly; The gear assembly includes two vertical plates, which are fixedly connected to the front and rear sides of the transmission table. A rack is rotatably connected to the top of one side of each vertical plate. A first gear is fixedly connected to both sides of the rack, and a second gear is fixedly connected to both ends of the rack. A vertical rack is meshed with the surface of the first gear, and a horizontal rack is meshed with the surface of the second gear. A T-shaped strip is fixedly connected to the bottom end of the horizontal rack, and a slide block is slidably connected to the surface of the T-shaped strip.

[0007] According to the above technical solution, a circular hole is opened inside the top of the vertical plate, the surface of the toothed rod is rotatably connected to the inside of the circular hole, and rectangular elongated openings are opened at both ends of the side of the vertical plate, and the surface of the slide block is fixedly connected to the inside of the rectangular elongated openings.

[0008] According to the above technical solution, the positioning component includes a hollow plate, which is fixedly connected to the top side of the vertical plate. A rectangular block is slidably connected inside the hollow plate. A card holder is fixedly connected to one end of the rectangular block. First springs are fixedly connected to the top of the left and right ends of the card holder. A T-shaped plate is fixedly connected to the bottom of the first spring. A vertical strip is fixedly connected to the top middle of the T-shaped plate. A T-shaped block is fixedly connected to the top of the vertical strip. A carding rod is fixedly connected to the middle of the T-shaped block. A connecting strip is fixedly connected to one end of the rectangular block. A clamping plate is fixedly connected to one end of the connecting strip. An upper handle is fixedly connected to the left end of the T-shaped plate. A lower handle is fixedly connected to the bottom left side of the card holder. A positioning strip is fixedly connected to the top left side of the rectangular block.

[0009] According to the above technical solution, a limiting groove is opened inside the card holder, the surface of the T-shaped plate is slidably connected to the inside of the limiting groove, a rectangular opening is opened at the top of the card holder, and the surface of the vertical strip is slidably connected to the inside of the rectangular opening. Moving the card holder drives the rectangular block to move under the limiting position in the hollow plate, thereby driving the connecting strip to move accordingly, and ultimately changing the spacing of the clamping plates, so that the clamping plates can adapt to the clamping size of workpieces of different sizes.

[0010] According to the above technical solution, a positioning hole is opened inside the positioning strip, the surface of the clamping rod matches the inside of the positioning hole, a rectangular slot is opened inside the hollow plate, and the surface of the rectangular block is slidably connected to the inside of the rectangular slot.

[0011] According to the above technical solution, a square hole is opened inside the vertical plate, the surface of the connecting strip is slidably connected to the inside of the square hole, an opening is opened on the left side of the card seat, and the surface of the upper handle is located inside the opening.

[0012] According to the above technical solution, the clamping mechanism includes a top plate, which is disposed on the top of the transmission table. Guide seats are fixedly connected to the front and rear ends of the bottom of the top plate, a first motor is fixedly connected to the left end of the guide seats, and a bidirectional screw is rotatably connected to the right end of the first motor. Threaded blocks are threaded to both ends of the surface of the bidirectional screw, and a hinge rod is hinged to the surface of the threaded block. A support plate is hinged to the bottom end of the hinge rod. T-shaped frames are fixedly connected to the front and rear ends of the support plate, and the surface of the T-shaped frames is fixedly connected to the surface of the vertical rack. A limit strip is fixedly connected to the top of the T-shaped frames, and a top block is fixedly connected to the top end of one side of the limit strip. A second spring is fixedly connected to the bottom end of the top block, and the bottom end of the second spring is fixedly connected to the top of the top plate. A support rod is fixedly connected to the top of the support plate, and the surface of the support rod is slidably connected to the middle of the interior of the top plate.

[0013] According to the above technical solution, a sliding groove is opened inside the guide seat, the surface of the threaded block is slidably connected to the inside of the sliding groove, a through hole is opened inside the guide seat, the surface of the bidirectional screw passes through the through hole inside the guide seat, square openings are opened at both ends of the top plate, and the surface of the limiting strip is slidably connected to the inside of the square opening. Under the support and limiting action of the top plate, the corresponding up and down sliding action is performed. In this process, when the support plate moves downward, it drives the scanning device to move downward and perform scanning operation on the workpiece. The scanning is convenient and fast, and automatic scanning can be performed without manual hand-held operation.

[0014] According to the above technical solution, the adjustment mechanism includes a side plate, which is fixedly connected to the bottom of the support plate. A second motor is fixedly connected to the left side of the side plate, and an electric pole is fixedly connected to the right end of the second motor. A connecting vertical block is fixedly connected to the right end of the electric pole, and a scanning device is fixedly connected to the bottom of the connecting vertical block. A support ring is fixedly connected to the left end of the connecting vertical block, and a ring seat is fixedly connected to the right side of the side plate.

[0015] According to the above technical solution, an annular groove is formed inside the ring seat, the surface of the support ring is rotatably connected to the inside of the annular groove, a through hole is formed inside the side plate, and the surface of the electric rod passes through the through hole inside the side plate. When the second motor starts and drives the electric rod to rotate, it can drive the connecting vertical block to rotate, and correspondingly drive the support ring to rotate under the support inside the ring seat. This can change the scanning angle of the scanning device accordingly, thus adapting to the scanning operation of different types of workpieces.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. This projection barcode scanner, through its scanning mechanism, has a first gear that rotates, causing its connected rack to rotate under the support of a vertical plate. This rotation, in turn, causes the second gear to rotate, moving the horizontal rack left and right. During this movement, the horizontal rack slides stably under the support of a connected T-shaped strip inside a slide block. This movement causes the connected clamping plate to clamp the workpiece, automatically aligning the label on the workpiece with the position below the scanning device, thus facilitating the scanning operation.

[0017] 2. This projection barcode scanner, through its scanning mechanism, grips the lower and upper handles, thereby causing the T-shaped plate to move within the clamping seat, which in turn causes the first spring to change its elastic support force. This, in turn, causes the vertical bar to move accordingly within the clamping seat. As the T-shaped block moves downward, it also causes the clamping rod to move downward and disengage from the positioning bar. During this process, it can move the clamping seat and cause the rectangular block to move within the perforated plate, thereby causing the connecting bar to move accordingly and ultimately changing the spacing of the clamping plates. This allows the clamping plates to adapt to the clamping size of workpieces of different dimensions.

[0018] 3. This projection-type barcode scanner, through a clamping mechanism, uses a threaded block to drive a hinged rod to rotate, which in turn drives a support plate to slide up and down using a connected T-shaped frame under the support and limiting action of the limiting strip inside the top plate. In this process, when the support plate moves downward, it drives the scanning device to move downward and perform scanning operations on the workpiece. The scanning is convenient and quick, and can be performed automatically without manual hand-held operation.

[0019] 4. This projection barcode scanner, through its adjustable mechanism, allows for angle adjustment to accommodate different label scanning angles during operation. When the second motor starts and rotates the pole, it in turn rotates the connecting vertical block, which in turn rotates the support ring within the ring seat. This allows for changing the scanning angle of the scanner, thus adapting to scanning different types of workpieces. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional view of the structure of the present invention; Figure 2 This is a perspective view of the scanning mechanism of the present invention; Figure 3 This is a three-dimensional exploded view of the gear assembly of the present invention; Figure 4 This is a three-dimensional exploded view of the gear assembly parts of the present invention; Figure 5 This is a three-dimensional exploded view of the structural positioning component of the present invention; Figure 6 This is a three-dimensional sectional view of the structural locking component of the present invention. Figure 7 This is a three-dimensional exploded view of the clamping mechanism of the present invention; Figure 8 This is a three-dimensional exploded view of the clamping mechanism parts of the present invention; Figure 9 This is a three-dimensional exploded view of the structural adjustment mechanism of the present invention.

[0021] In the diagram: 1. Transmission table; 2. Scanning mechanism; 21. Gear assembly; 211. Vertical plate; 212. Gear rack; 213. First gear; 214. Second gear; 215. Horizontal rack; 216. T-shaped bar; 217. Slide; 218. Vertical rack; 22. Locking assembly; 221. Hollow plate; 222. Rectangular block; 223. Locking seat; 2231. First spring; 224. T-shaped plate; 225. Vertical bar; 226. T-shaped block; 227. Locking rod; 228. Connecting bar; 229. Positioning bar; 2291. Upper handle; 2292. Lower handle; 2293. Clamping plate; 3. Clamping mechanism; 31. Top plate; 32. Guide seat; 33. First motor; 34. Bidirectional screw; 35. Threaded block; 351. Hinge rod; 36. Support plate; 37. T-shaped frame; 38. Limiting strip; 39. Top block; 391. Second spring; 392. Support rod; 4. Adjustment mechanism; 41. Side plate; 42. Second motor; 43. Electric pole; 44. Connecting vertical block; 45. Support ring; 46. Ring seat; 47. Scanning equipment. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention provides the following technical solutions: Example 1

[0024] Combination Figures 2 to 9 A projection barcode scanner includes a transmission table 1, scanning mechanisms 2 are fixedly connected to both sides of the transmission table 1, a clamping mechanism 3 is fixedly connected to the top of the scanning mechanism 2, and an adjustment mechanism 4 is fixedly connected to the bottom of the clamping mechanism 3. The scanning mechanism 2 includes a gear assembly 21 and a locking assembly 22, with the locking assembly 22 disposed on one side of the gear assembly 21; Gear assembly 21 includes two vertical plates 211, which are fixedly connected to the front and rear sides of the transmission table 1. A rack 212 is rotatably connected to the top of one side of each vertical plate 211. A first gear 213 is fixedly connected to both sides of the rack 212, and a second gear 214 is fixedly connected to both ends of the rack 212. A vertical rack 218 is meshed with the surface of the first gear 213, and a horizontal rack 215 is meshed with the surface of the second gear 214. A T-shaped strip 216 is fixedly connected to the bottom of the horizontal rack 215, and a slide block 217 is slidably connected to the surface of the T-shaped strip 216. A circular hole is opened inside the top of each vertical plate 211, and the surface of the rack 212 is rotatably connected to the inside of the circular hole. Rectangular elongated openings are opened at both ends of the side of each vertical plate 211, and the surface of the slide block 217 is fixedly connected to the inside of the rectangular elongated openings. The positioning assembly 22 includes a hollow plate 221. A perforated plate 221 is fixedly connected to the top side of a vertical plate 211. A rectangular block 222 is slidably connected inside the perforated plate 221. A card holder 223 is fixedly connected to one end of the rectangular block 222. A first spring 2231 is fixedly connected to the top of the left and right ends of the card holder 223. A T-shaped plate 224 is fixedly connected to the bottom of the first spring 2231. A vertical strip 225 is fixedly connected to the middle of the top of the T-shaped plate 224. A T-shaped block 226 is fixedly connected to the top of the vertical strip 225. A card rod 227 is fixedly connected to the middle of the inside of the T-shaped block 226. A connecting strip 228 is fixedly connected to one end of the rectangular block 222. A clamping plate 2293 is fixedly connected to one end of the connecting strip 228. An upper handle 2291 is fixedly connected to the left end of the T-shaped plate 224. A lower handle 2292 is fixedly connected to the bottom left side of the card holder 223. A positioning strip 229 is fixedly connected to the top left side of the rectangular block 222.

[0025] Furthermore, a limiting groove is provided inside the card holder 223, and the surface of the T-shaped plate 224 is slidably connected to the inside of the limiting groove. A rectangular opening is provided at the top of the card holder 223, and the surface of the vertical bar 225 is slidably connected to the inside of the rectangular opening. A positioning hole is provided inside the positioning bar 229, and the surface of the card rod 227 matches the inside of the positioning hole. A rectangular slot is provided inside the hollow plate 221, and the surface of the rectangular block 222 is slidably connected to the inside of the rectangular slot. A square hole is provided inside the vertical plate 211, and the surface of the connecting bar 228 is slidably connected to the inside of the square hole. An opening is provided on the left side of the card holder 223, and the surface of the upper handle 2291 is located inside the opening. The horizontal rack 215 slides stably under the support of the connected T-shaped bar 216 inside the slide block 217, thereby driving the connected clamping plate 2293 to clamp the workpiece when it moves, and thus facilitating the automatic alignment of the label position on the workpiece with the position below the scanning device 47, thereby facilitating the scanning operation of the workpiece. Example 2

[0026] See Figure 1-9Furthermore, based on Embodiment 1, the clamping mechanism 3 further includes a top plate 31, which is disposed on the top of the transmission table 1. Guide seats 32 are fixedly connected to the front and rear ends of the bottom of the top plate 31, a first motor 33 is fixedly connected to the left end of the guide seat 32, and a bidirectional screw 34 is rotatably connected to the right end of the first motor 33. Threaded blocks 35 are threaded to both ends of the surface of the bidirectional screw 34, and a hinge rod 351 is hinged to the surface of the threaded block 35. A support plate 36 is hinged to the bottom end of the hinge rod 351. T-shaped frames 37 are fixedly connected to the front and rear ends of the support plate 36, and the surface of the T-shaped frame 37 is fixedly connected to the surface of the vertical rack 218. A limit strip 38 is fixedly connected to the top of the T-shaped frame 37, and a top block 39 is fixedly connected to the top end of one side of the limit strip 38. A second spring 391 is fixedly connected to the bottom end of the top block 39, and the bottom end of the second spring 391 is fixedly connected to the top of the top plate 31. A support rod 392 is fixedly connected to the top of the support plate 36, and the surface of the support rod 392 is slidably connected to the middle of the interior of the top plate 31.

[0027] Furthermore, a sliding groove is opened inside the guide seat 32, and the surface of the threaded block 35 is slidably connected to the inside of the sliding groove. A through hole is opened inside the guide seat 32, and the surface of the bidirectional screw 34 passes through the through hole inside the guide seat 32. Square openings are opened at both ends of the top plate 31, and the surface of the limiting strip 38 is slidably connected to the inside of the square opening. Under the support and limiting action inside the top plate 31, the corresponding up and down sliding action is performed. In this process, when the support plate 36 moves downward, it drives the scanning device 47 to move downward and perform scanning operation on the workpiece. The scanning is convenient and quick, and automatic scanning can be performed without manual hand-held operation. Example 3

[0028] See Figure 1-9 Furthermore, based on Embodiment 1, the adjustment mechanism 4 includes a side plate 41, which is fixedly connected to the bottom of the support plate 36. A second motor 42 is fixedly connected to the left side of the side plate 41, and an electric rod 43 is fixedly connected to the right end of the second motor 42. A connecting vertical block 44 is fixedly connected to the right end of the electric rod 43. A scanning device 47 is fixedly connected to the bottom of the connecting vertical block 44, and a support ring 45 is fixedly connected to the left end of the connecting vertical block 44. A ring seat 46 is fixedly connected to the right side of the side plate 41.

[0029] Furthermore, an annular groove is formed inside the ring seat 46, and the surface of the support ring 45 is rotatably connected to the inside of the annular groove. A through hole is formed inside the side plate 41, and the surface of the electric rod 43 passes through the through hole inside the side plate 41. When the corresponding angle adjustment operation is required, the second motor 42 starts and drives the electric rod 43 to rotate, which in turn drives the connecting vertical block 44 to rotate, and correspondingly drives the support ring 45 to rotate under the support inside the ring seat 46. This can change the scanning angle of the scanning device 47 accordingly, thus adapting to the scanning operation of different types of workpieces.

[0030] In actual operation, when this device is used to scan logistics transport items, the transport workpiece is placed on the transmission table 1 and transferred to the bottom of the scanning device 47. At this time, the first motor 33 starts under the support of the guide seat 32 and drives the bidirectional screw 34 to rotate under the limiting action of the guide seat 32. This causes the threaded block 35 to slide under the limiting action inside the guide seat 32. During this process, the threaded block 35 drives the hinge rod 351 to rotate, which in turn drives the support plate 36 to slide up and down using the connected T-shaped frame 37 under the supporting and limiting action of the limiting strip 38 inside the top plate 31. During this process, when the support plate 36 moves downward, it drives the scanning device 47 to move downward and perform the scanning operation on the workpiece. The scanning is convenient and quick, and automatic scanning can be performed without manual hand-held operation. In addition, when the scanning device 47 is used for scanning, the support plate 36 moves downward, which in turn drives the vertical rack 218 connected to it to move downward, causing the first gear 213 connected to it to rotate. This causes the rack 212 connected to it to rotate under the support of the vertical plate 211. Consequently, the second gear 214 rotates, causing the horizontal rack 215 to move in the left and right directions. During this movement, the horizontal rack 215 slides stably under the support of the connected T-shaped bar 216 inside the slide block 217. This causes the connected clamping plate 2293 to move and clamp the workpiece, thus facilitating the automatic alignment of the label position on the workpiece with the position below the scanning device 47, which in turn facilitates the scanning operation of the workpiece. Furthermore, when scanning workpieces, the clamping size needs to be changed for workpieces of different sizes. This requires corresponding adjustments. At this time, holding the lower handle 2292 and the upper handle 2291 causes the T-shaped plate 224 to move under the limit inside the clamping seat 223, which in turn causes the first spring 2231 to change its elastic support force. This causes the vertical bar 225 to move under the limit inside the clamping seat 223. This allows the T-shaped block 226 to move downwards, and also causes the clamping rod 227 to move downwards and disengage from the clamping position inside the positioning strip 229. In this process, the clamping seat 223 can be moved, and the rectangular block 222 can move under the limit inside the hollow plate 221. This causes the connecting strip 228 to move accordingly, and finally changes the spacing of the clamping plate 2293, so that the clamping plate 2293 can adapt to the clamping size of workpieces of different sizes. Furthermore, when scanning workpieces, the labeling angle may change depending on the type of workpiece. Therefore, in order to adapt to different label scanning angles when using the scanning device 47, it is necessary to adjust the angle accordingly. At this time, the second motor 42 starts and drives the electric rod 43 to rotate, which in turn drives the connecting vertical block 44 to rotate. This, in turn, drives the support ring 45 to rotate under the support inside the ring seat 46, thereby changing the scanning angle of the scanning device 47 to adapt to the scanning operation of different types of workpieces.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A projection barcode scanner, comprising a drive table (1), characterized in that: The transmission table (1) is fixedly connected to two sides of a scanning mechanism (2), the top of the scanning mechanism (2) is fixedly connected to a clamping mechanism (3), and the bottom of the clamping mechanism (3) is fixedly connected to an adjustment mechanism (4). The scanning mechanism (2) includes a gear assembly (21) and a locking assembly (22), wherein the locking assembly (22) is disposed on one side of the gear assembly (21); The gear assembly (21) includes two vertical plates (211), which are fixedly connected to the front and rear sides of the transmission table (1). A rack (212) is rotatably connected to the top of one side of the vertical plate (211). A first gear (213) is fixedly connected to both sides of the rack (212). A second gear (214) is fixedly connected to both ends of the rack (212). A vertical rack (218) is meshed with the surface of the first gear (213). A horizontal rack (215) is meshed with the surface of the second gear (214). A T-shaped strip (216) is fixedly connected to the bottom end of the horizontal rack (215). A slide block (217) is slidably connected to the surface of the T-shaped strip (216). The clamping mechanism (3) includes a top plate (31), which is located on the top of the transmission table (1). Guide seats (32) are fixedly connected to the front and rear ends of the bottom of the top plate (31). A first motor (33) is fixedly connected to the left end of the guide seat (32). A bidirectional screw (34) is rotatably connected to the right end of the first motor (33). Threaded blocks (35) are threaded to both ends of the surface of the bidirectional screw (34). A hinge rod (351) is hinged to the surface of the threaded block (35). A support plate (36) is hinged to the bottom end of the hinge rod (351). T-shaped frames (37) are fixedly connected to the front and rear ends respectively. The surface of the T-shaped frame (37) is fixedly connected to the surface of the vertical rack (218). A limit strip (38) is fixedly connected to the top of the T-shaped frame (37). A top block (39) is fixedly connected to the top of one side of the limit strip (38). A second spring (391) is fixedly connected to the bottom of the top block (39). The bottom of the second spring (391) is fixedly connected to the top of the top plate (31). A support rod (392) is fixedly connected to the top of the support plate (36). The surface of the support rod (392) is slidably connected to the middle of the inside of the top plate (31). The guide seat (32) has a sliding groove inside, the surface of the threaded block (35) is slidably connected to the inside of the sliding groove, the guide seat (32) has a through hole inside, the surface of the bidirectional screw (34) passes through the through hole inside the guide seat (32), the top plate (31) has square openings at both ends, and the surface of the limiting strip (38) is slidably connected to the inside of the square opening. The adjustment mechanism (4) includes a side plate (41), which is fixedly connected to the bottom of the support plate (36). A second motor (42) is fixedly connected to the left side of the side plate (41), and an electric pole (43) is fixedly connected to the right end of the second motor (42). A connecting vertical block (44) is fixedly connected to the right end of the electric pole (43), and a scanning device (47) is fixedly connected to the bottom end of the connecting vertical block (44). A support ring (45) is fixedly connected to the left end of the connecting vertical block (44), and a ring seat (46) is fixedly connected to the right side of the side plate (41).

2. A projection barcode scanner according to claim 1, characterized in that: The top of the vertical plate (211) has a circular hole, the surface of the toothed rod (212) is rotatably connected to the inside of the circular hole, and rectangular long openings are respectively opened at both ends of the side of the vertical plate (211). The surface of the slide (217) is fixedly connected to the inside of the rectangular long opening.

3. A projection barcode scanner according to claim 2, characterized in that: The positioning component (22) includes a perforated plate (221), which is fixedly connected to the top side of the vertical plate (211). A rectangular block (222) is slidably connected inside the perforated plate (221). A card holder (223) is fixedly connected to one end of the rectangular block (222). A first spring (2231) is fixedly connected to the top of the left and right ends of the card holder (223). A T-shaped plate (224) is fixedly connected to the bottom of the first spring (2231). A vertical strip (225) is fixedly connected to the middle of the top of the T-shaped plate (224). The top of the vertical strip (225) is fixedly connected to a T-shaped block (226), and the middle of the inside of the T-shaped block (226) is fixedly connected to a locking rod (227). One end of the rectangular block (222) is fixedly connected to a connecting strip (228), and one end of the connecting strip (228) is fixedly connected to a clamping plate (2293). The left end of the T-shaped plate (224) is fixedly connected to an upper handle (2291), the bottom left end of the card seat (223) is fixedly connected to a lower handle (2292), and the top left end of the rectangular block (222) is fixedly connected to a positioning strip (229).

4. A projection barcode scanner according to claim 3, characterized in that: The card holder (223) has a limiting groove inside, the surface of the T-shaped plate (224) is slidably connected to the inside of the limiting groove, the top of the card holder (223) has a rectangular opening, and the surface of the vertical strip (225) is slidably connected to the inside of the rectangular opening.

5. A projection barcode scanner according to claim 4, characterized in that: The positioning strip (229) has a positioning hole inside, the surface of the clamping rod (227) matches the inside of the positioning hole, the hollow plate (221) has a rectangular slot inside, and the surface of the rectangular block (222) is slidably connected to the inside of the rectangular slot.

6. A projection barcode scanner according to claim 5, characterized in that: The vertical plate (211) has a square hole inside, the surface of the connecting strip (228) is slidably connected to the inside of the square hole, the card holder (223) has an opening on the left side, and the surface of the upper handle (2291) is located inside the opening.

7. A projection barcode scanner according to claim 1, characterized in that: The ring seat (46) has an annular groove inside, the surface of the support ring (45) is rotatably connected to the inside of the annular groove, the side plate (41) has a through hole inside, and the surface of the electric pole (43) passes through the through hole inside the side plate (41).

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