Projection type bar code scanner

Abstract

The invention relates to the technical field of scanners, and discloses a projection type bar code scanner which comprises a transmission table, scanning mechanisms are fixedly connected to the two sides of the transmission table respectively, clamping mechanisms are fixedly connected to the tops of the scanning mechanisms, and adjusting mechanisms are fixedly connected to the bottom ends of the clamping mechanisms; the gear assembly comprises two vertical plates, the two vertical plates are fixedly connected to the front side and the rear side of the transmission table, a toothed bar is rotationally connected to the interior of the top end of one side of each vertical plate, first gears are fixedly connected to the two sides of the surface of each toothed bar correspondingly, and second gears are fixedly connected to the two ends of each toothed bar correspondingly. The surface of the first gear is in engaged connection with a vertical rack. According to the projection type bar code scanner, the scanning mechanism is arranged, so that when the connected clamping plate is driven to move, a workpiece is clamped, a label position on the workpiece can be conveniently and automatically aligned to a position below scanning equipment, and the scanning operation on the workpiece can be conveniently carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of scanners, and in particular to a projection type barcode scanner. Background Art

[0002] ‌A projection barcode scanner is a scanning device that can efficiently read one-dimensional codes, two-dimensional codes, and barcodes on mobile phones. ‌This scanner uses projection technology to project light onto the barcode, and then recognizes the barcode information by receiving the reflected light. The design of projection barcode scanners enables them to adapt to various environments and working conditions. Whether it is a compact and powerful scanning device or a scene that requires efficient barcode reading, projection barcode scanners can provide a reliable solution.

[0003] According to a projection-type barcode scanner disclosed in announcement number CN204143453U, at least one barcode scanner is arranged at a height position above a working platform in a working space.

[0004] Although the projection-type barcode scanner can read the barcode on the surface of the object by the image sensor of the barcode scanner and transmit the generated barcode information to the main controller via the signal transmission line, it is not convenient to automatically align the label position on the workpiece on the scanning device, and is therefore 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 object of the present invention is to provide a projection type barcode scanner to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a projection type barcode scanner, comprising a transmission platform, scanning mechanisms are fixedly connected to both sides of the transmission platform, a clamping mechanism is fixedly connected to the top of the scanning mechanism, and an adjustment mechanism is fixedly connected to the bottom of the clamping mechanism; The scanning mechanism comprises a gear assembly and a positioning assembly, wherein the positioning assembly is arranged on one side of the gear assembly; The gear assembly includes a vertical plate, and there are two vertical plates. The two vertical plates are fixedly connected to the front and rear sides of the transmission platform. A gear rod is rotatably connected inside the top of one side of the vertical plate. The first gear is fixedly connected to the two sides of the gear rod surface respectively, and the second gear is fixedly connected to the two ends of the gear rod respectively. The first gear surface is meshed with a vertical rack, and the second gear surface is meshed with a horizontal rack. The bottom end of the horizontal rack is fixedly connected to a T-shaped bar, and the surface of the T-shaped bar is slidably connected to a sliding seat.

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

[0008] According to the above technical scheme, the positioning assembly includes a hollow plate, which is fixedly connected to the top of the side of the vertical plate, and a rectangular block is slidably connected inside the hollow plate, one end of the rectangular block is fixedly connected to a holder, and the tops of the left and right ends of the holder are respectively fixedly connected to a first spring, the bottom end of the first spring is fixedly connected to a T-shaped plate, the middle of the top of the T-shaped plate is fixedly connected to a vertical bar, the top of the vertical bar is fixedly connected to the T-shaped block, the middle of the T-shaped block is fixedly connected to a clamping rod, one end of the rectangular block is fixedly connected to a connecting bar, and one end of the connecting bar is fixedly connected to a splint, the left end of the T-shaped plate is fixedly connected to an upper handle, the bottom left end of the holder is fixedly connected to a lower handle, and the top left end of the rectangular block is fixedly connected to a positioning bar.

[0009] According to the above technical solution, a limiting groove is opened inside the clamping seat, the surface of the T-shaped plate is slidably connected to the inside of the limiting groove, a rectangular opening is opened on the top of the clamping seat, and the surface of the vertical bar is slidably connected to the inside of the rectangular opening. The clamping seat is moved and drives the rectangular block to move under the limit in the hollow plate, thereby driving the connecting bar to move accordingly, and finally changing the spacing between the clamps, so that the clamps can adapt to the clamping size of workpieces of different sizes.

[0010] According to the above technical solution, a positioning hole is provided inside the positioning strip, the surface of the clamping rod matches the inside of the positioning hole, a rectangular slot is provided inside the hollow plate, and the surface of the rectangular block is slidably connected with 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 holder, and the surface of the upper handle is located inside the opening.

[0012] According to the above technical scheme, the clamping mechanism includes a top plate, the top plate is arranged on the top of the transmission platform, the front and rear ends of the bottom of the top plate are respectively fixedly connected with a guide seat, the left end of the guide seat is fixedly connected with a first motor, the right end of the first motor is rotatably connected with a bidirectional screw, the two ends of the surface of the bidirectional screw are respectively threadedly connected with threaded blocks, the surface of the threaded block is hinged with a hinged rod, the bottom end of the hinged rod is hinged with a support plate, the front and rear ends of the support plate are respectively fixedly connected with a T-shaped frame, the surface of the T-shaped frame is fixedly connected with the surface of the vertical rack, the top of the T-shaped frame is fixedly connected with a limiting strip, the top of one side of the limiting strip is fixedly connected with a top block, the bottom end of the top block is fixedly connected with a second spring, the bottom end of the second spring is fixedly connected to the top of the top plate, the top of the support plate is fixedly connected with a support rod, and the surface of the support rod is slidably connected to the middle of the inside of the top plate.

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

[0014] According to the above technical solution, the adjustment mechanism includes a side plate, which is fixedly connected to the bottom end of the support plate, a second motor is fixedly connected to the left side of the side plate, a 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 pole, a scanning device is fixedly connected to the bottom end 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 provided inside the ring seat, the surface of the support ring is rotatably connected to the inside of the annular groove, a through hole is provided inside the side plate, and the surface of the electric pole passes through the through hole provided inside the side plate. When the second motor is started and drives the electric pole to rotate, it can drive the connecting vertical block to rotate, and correspondingly drive the support ring to perform corresponding support rotation under the support inside the ring seat, thereby correspondingly changing the scanning angle of the scanning device, and 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. The projection type barcode scanner, through the scanning mechanism set up, the first gear rotates accordingly, thereby driving the connected gear rod to rotate under the support of the vertical plate, and correspondingly driving the second gear to rotate, driving the cross rack to move in the left and right directions, and during this movement, the cross rack uses the connected T-shaped bar to slide stably under the support of the inside of the slide, thereby driving the connected clamping plate to clamp the workpiece when moving, and then facilitating the automatic alignment of the label position on the workpiece at the position below the scanning device, so as to facilitate the scanning operation of the workpiece.

[0017] 2. The projection barcode scanner holds the lower handle and the upper handle through the scanning mechanism, and then drives the T-shaped plate to change the elastic supporting force of the first spring under the limit inside the base, and then drives the vertical bar to move accordingly under the limit inside the base, so that when the T-shaped block moves downward, it can also drive the clamping rod to move downward and disengage from the position inside the positioning bar. In this process, it can move the base and drive the rectangular block to move under the limit in the hollow plate, thereby correspondingly driving the connecting bar to move, and finally changing the spacing of the clamps, so that the clamps can adapt to the clamping size of workpieces of different sizes.

[0018] 3. The projection type barcode scanner, through the clamping mechanism, the threaded block drives the hinged rod to rotate accordingly, and then drives the support plate to use the connected T-shaped frame to slide up and down accordingly under the support and limiting effect of the limit bar inside the top plate. In this process, when the support plate moves downward, it drives the scanning device to move downward and scan the workpiece, and the scanning is convenient and quick, and automatic scanning can be performed without manual holding.

[0019] 4. The projection-type barcode scanner, through the setting of the adjustment mechanism, needs to perform corresponding angle adjustment operations in order to facilitate the label scanning operation at different angles when using the scanning device for scanning. At this time, the second motor starts and drives the electric pole to rotate, which can drive the connecting vertical block to rotate, and correspondingly drive the support ring to perform corresponding support rotation under the support inside the ring seat, so as to change the scanning angle of the scanning device accordingly, and thus adapt to the scanning operation of different types of workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a three-dimensional diagram of the structure of the present invention; Figure 2 A three-dimensional diagram of the scanning mechanism of the structure 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 parts of the gear assembly structure of the present invention; Figure 5 This is a three-dimensional exploded view of the structural positioning component of the present invention; Figure 6 It is a three-dimensional split cross-sectional view of the parts of the structural positioning assembly of the present invention; Figure 7 This is a three-dimensional exploded view of the structural clamping mechanism of the present invention; Figure 8 This is a three-dimensional exploded view of the parts of the clamping mechanism of the present invention; Fig. 9 It is a three-dimensional exploded view of the structural adjustment mechanism of the present invention.

[0021] In the figure: 1, transmission platform; 2, scanning mechanism; 21, gear assembly; 211, vertical plate; 212, gear rod; 213, first gear; 214, second gear; 215, horizontal rack; 216, T-shaped bar; 217, slide; 218, vertical rack; 22, positioning assembly; 221, hollow plate; 222, rectangular block; 223, seat; 2231, first spring; 224, T-shaped plate; 225, vertical bar; 226, T-shaped block; 227, clamping 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. hinged rod; 36. support plate; 37. T-shaped frame; 38. limit 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 device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention provides the following technical solutions: Embodiment 1

[0024] Combination Figures 2 to 9 A projection type barcode scanner comprises a transmission platform 1, scanning mechanisms 2 are fixedly connected to both sides of the transmission platform 1, a clamping mechanism 3 is fixedly connected to the top of the scanning mechanism 2, and an adjusting mechanism 4 is fixedly connected to the bottom of the clamping mechanism 3; The scanning mechanism 2 includes a gear assembly 21 and a positioning assembly 22, wherein the positioning assembly 22 is disposed on one side of the gear assembly 21; The gear assembly 21 includes a vertical plate 211, and there are two vertical plates 211. The two vertical plates 211 are fixedly connected to the front and rear sides of the transmission platform 1. A gear rod 212 is rotatably connected to the top of one side of the vertical plate 211. The first gear 213 is fixedly connected to the first gear 213 on both sides of the surface of the gear rod 212. The second gear 214 is fixedly connected to the two ends of the gear rod 212. The first gear 213 is meshed with a vertical rack 218 on the surface, and the second gear 214 is meshed with a horizontal rack 215 on the surface. The bottom end of the horizontal rack 215 is fixedly connected to a T-shaped bar 216, and the surface of the T-shaped bar 216 is slidably connected to a slide seat 217. A circular hole is provided inside the top of the vertical plate 211, and the surface of the gear rod 212 is rotatably connected to the inside of the circular hole. Rectangular long openings are provided at the two ends of the side of the vertical plate 211, and the surface of the slide seat 217 is fixedly connected to the inside of the rectangular long opening. The positioning assembly 22 includes a hollow plate 221 The hollow plate 221 is fixedly connected to the top of the side of the vertical plate 211, and a rectangular block 222 is slidably connected inside the hollow plate 221. A holder 223 is fixedly connected to one end of the rectangular block 222. The tops of the left and right ends of the holder 223 are respectively fixedly connected to first springs 2231, and the bottom end of the first spring 2231 is fixedly connected to a T-shaped plate 224. A vertical bar 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 bar 225. A clamping rod 227 is fixedly connected to the middle of the T-shaped block 226. A connecting strip 228 is fixedly connected to one end of the rectangular block 222. A splint 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 end of the holder 223. A positioning strip 229 is fixedly connected to the top left end of the rectangular block 222.

[0025] Furthermore, a limiting groove is provided inside the holder 223, 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 holder 223, 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, the surface of the clamping rod 227 matches the inside of the positioning hole, a rectangular groove is provided inside the hollow plate 221, the surface of the rectangular block 222 is slidably connected to the inside of the rectangular groove, a square hole is provided inside the vertical plate 211, 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 holder 223, the surface of the upper handle 2291 is located inside the opening, and the cross rack 215 uses the connected T-shaped bar 216 to slide stably under the support of the inside of the slide 217, thereby driving the connected clamping plate 2293 to clamp the workpiece when moving, and then facilitating the automatic alignment of the label position on the workpiece at the position below the scanning device 47, so as to facilitate the scanning operation of the workpiece. Embodiment 2

[0026] See also Figure 1-9, and on the basis of the first embodiment, the clamping mechanism 3 further comprises a top plate 31, the top plate 31 is arranged on the top of the transmission platform 1, the front and rear ends of the bottom of the top plate 31 are respectively fixedly connected with a guide seat 32, the left end of the guide seat 32 is fixedly connected with a first motor 33, the right end of the first motor 33 is rotatably connected with a bidirectional screw 34, the two ends of the surface of the bidirectional screw 34 are respectively threadedly connected with a thread block 35, the surface of the thread block 35 is hinged with a hinge rod 351, the bottom end of the hinge rod 351 is hinged with a support plate 36, the front and rear ends of the support plate 36 are respectively fixedly connected with a T-shaped frame 37, the surface of the T-shaped frame 37 is fixedly connected with the surface of the vertical rack 218, the top of the T-shaped frame 37 is fixedly connected with a limit strip 38, the top of one side of the limit strip 38 is fixedly connected with a top block 39, the bottom end of the top block 39 is fixedly connected with a second spring 391, the bottom end of the second spring 391 is fixedly connected with the top of the top plate 31, the top of the support plate 36 is fixedly connected with a support rod 392, and the surface of the support rod 392 is slidably connected with the middle of the inside of the top plate 31.

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

[0028] See also Figure 1-9 On the basis of the first embodiment, the adjusting mechanism 4 further comprises a side plate 41, the side plate 41 is fixedly connected to the bottom end of the supporting plate 36, a second motor 42 is fixedly connected to the left side of the side plate 41, a 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 pole 43, a scanning device 47 is fixedly connected to the bottom end of the connecting vertical block 44, a supporting 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.

[0029] Furthermore, an annular groove is provided inside the ring seat 46, the surface of the support ring 45 is rotatably connected to the inside of the annular groove, a through hole is provided inside the side plate 41, and the surface of the electric pole 43 passes through the through hole provided inside the side plate 41, and a corresponding angle adjustment operation is required. At this time, the second motor 42 is started and drives the electric pole 43 to rotate, thereby driving the connecting vertical block 44 to rotate, and correspondingly drives the support ring 45 to perform corresponding support rotation under the support inside the ring seat 46, thereby correspondingly changing the scanning angle of the scanning device 47, thereby adapting to the scanning operation of different types of workpieces.

[0030] In actual operation, when the device is used, when scanning the logistics transport parts, the transported workpiece is placed on the transmission platform 1 and transmitted to the bottom of the scanning device 47, at this time, the first motor 33 is started under the support of the guide seat 32 and drives the bidirectional screw 34 to rotate accordingly under the limiting action of the guide seat 32, thereby driving the threaded block 35 to slide accordingly under the limiting action inside the guide seat 32, and in this process, the threaded block 35 drives the hinged rod 351 to rotate accordingly and then drives the support plate 36 to slide up and down accordingly using the connected T-shaped frame 37 under the support and limiting action of the limiting bar 38 using the top plate 31, and then in 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, and 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 operation, when the support plate 36 moves downward, it drives the support plate 36 downward, and correspondingly drives the vertical rack 218 connected thereto to move downward, driving the first gear 213 meshing therewith to rotate accordingly, thereby driving the gear rod 212 connected thereto to rotate under the support of the vertical plate 211, and correspondingly drives the second gear 214 to rotate, driving the cross rack 215 to move in the left and right directions, and during this movement, the cross rack 215 uses the connected T-shaped bar 216 to slide stably under the support of the inside of the slide 217, thereby driving the connected clamping plate 2293 to clamp the workpiece when moving, and thereby facilitating the automatic alignment of the label position on the workpiece at the position below the scanning device 47, thereby facilitating the scanning operation of the workpiece; In addition, when scanning the workpiece, the clamping size of the workpiece with different sizes needs to be changed, and corresponding adjustments need to be made for this purpose. At this time, the lower handle 2292 and the upper handle 2291 are held, and the T-shaped plate 224 is driven to drive the first spring 2231 to change the elastic supporting force under the limit position inside the clamping seat 223, thereby driving the vertical bar 225 to move accordingly under the limit position inside the clamping seat 223, so that the T-shaped block 226 can be driven to move downward, and the clamping rod 227 can also be driven to move downward and disengage from the clamping position inside the positioning bar 229, and in this process, it can move the clamping seat 223 and drive the rectangular block 222 to move under the limit position in the hollow plate 221, thereby correspondingly driving the connecting bar 228 to move, and finally changing the spacing of the clamping plates 2293, so that the clamping plates 2293 can adapt to the clamping size of workpieces of different sizes; In addition, when performing a scanning operation on the workpiece, the labeling angle may change accordingly for different types of workpieces. Therefore, in order to facilitate the adaptation of label scanning operations at different angles when using the scanning device 47 for scanning, it is necessary to perform corresponding angle adjustment operations. At this time, the second motor 42 starts and drives the electric pole 43 to rotate, which can in turn drive the connecting vertical block 44 to rotate, and correspondingly drive the support ring 45 to perform corresponding support rotation under the support of the ring seat 46, so that the scanning angle of the scanning device 47 can be changed accordingly, thereby adapting to scanning operations of different types of workpieces.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A projection type barcode scanner, comprising a transmission platform (1), characterized in that: The two sides of the transmission platform (1) are respectively fixedly connected with scanning mechanisms (2), the top of the scanning mechanism (2) is fixedly connected with a clamping mechanism (3), and the bottom of the clamping mechanism (3) is fixedly connected with an adjustment mechanism (4); The scanning mechanism (2) comprises a gear assembly (21) and a positioning assembly (22), wherein the positioning assembly (22) is arranged on one side of the gear assembly (21); The gear assembly (21) comprises a vertical plate (211), wherein there are two vertical plates (211), and the two vertical plates (211) are fixedly connected to the front and rear sides of the transmission platform (1); a gear rod (212) is rotatably connected to the top of one side of the vertical plate (211); first gears (213) are fixedly connected to the two sides of the surface of the gear rod (212); second gears (214) are fixedly connected to the two ends of the gear rod (212); a vertical rack (218) is meshedly connected to the surface of the first gear (213); a horizontal rack (215) is meshedly connected to the surface of the second gear (214); a T-shaped bar (216) is fixedly connected to the bottom end of the horizontal rack (215); and a sliding seat (217) is slidably connected to the surface of the T-shaped bar (216).

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

3. The projection type barcode scanner according to claim 2, characterized in that: The locking assembly (22) comprises a hollow plate (221), the hollow plate (221) being fixedly connected to the top of the side of the vertical plate (211), a rectangular block (222) being slidably connected inside the hollow plate (221), one end of the rectangular block (222) being fixedly connected to a locking seat (223), the tops of the left and right ends of the locking seat (223) being fixedly connected to first springs (2231) respectively, the bottom end of the first spring (2231) being fixedly connected to a T-shaped plate (224), and the middle of the top of the T-shaped plate (224) being fixedly connected to a vertical bar (225). The top of the vertical bar (225) is fixedly connected to a T-shaped block (226), the middle of the T-shaped block (226) is fixedly connected to a clamping rod (227), one end of the rectangular block (222) is fixedly connected to a connecting bar (228), one end of the connecting bar (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 left bottom end of the clamping seat (223) is fixedly connected to a lower handle (2292), and the left top end of the rectangular block (222) is fixedly connected to a positioning bar (229).

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

5. The projection type barcode scanner according to claim 4, characterized in that: A positioning hole is provided inside the positioning strip (229), the surface of the clamping 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.

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

7. The projection type barcode scanner according to claim 6, characterized in that: The clamping mechanism (3) comprises a top plate (31), the top plate (31) being arranged on the top of the transmission platform (1), the front and rear ends of the bottom of the top plate (31) being fixedly connected to guide seats (32), the left end of the guide seat (32) being fixedly connected to a first motor (33), the right end of the first motor (33) being rotatably connected to a bidirectional screw rod (34), the two ends of the surface of the bidirectional screw rod (34) being respectively threadedly connected to thread blocks (35), the surface of the thread block (35) being hinged to a hinge rod (351), the bottom end of the hinge rod (351) being hinged to a support plate (36), the support plate (36) ) are respectively fixedly connected to T-shaped frames (37) at the front and rear ends, the surface of the T-shaped frame (37) is fixedly connected to the surface of the vertical rack (218), the top of the T-shaped frame (37) is fixedly connected to a limit strip (38), the top of one side of the limit strip (38) is fixedly connected to a top block (39), the bottom end of the top block (39) is fixedly connected to a second spring (391), the bottom end of the second spring (391) is fixedly connected to the top of the top plate (31), the top of the support plate (36) is fixedly connected to a support rod (392), and the surface of the support rod (392) is slidably connected to the middle of the inside of the top plate (31).

8. The projection type barcode scanner according to claim 7, characterized in that: A slide groove is provided inside the guide seat (32), the surface of the threaded block (35) is slidably connected to the inside of the slide groove, a through hole is provided inside the guide seat (32), the surface of the bidirectional screw (34) passes through the through hole provided inside the guide seat (32), square openings are provided at both ends of the top of the top plate (31), and the surface of the limit strip (38) is slidably connected to the inside of the square opening.

9. The projection type barcode scanner according to claim 8, characterized in that: The adjustment mechanism (4) comprises a side plate (41), wherein the side plate (41) is fixedly connected to the bottom end of the support plate (36), a second motor (42) is fixedly connected to the left side of the side plate (41), a 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 pole (43), a scanning device (47) is fixedly connected to the bottom end of the connecting vertical block (44), a supporting 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).

10. The projection type barcode scanner according to claim 9, characterized in that: The ring seat (46) has an annular groove formed 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 formed inside, and the surface of the electric pole (43) passes through the through hole formed inside the side plate (41).

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