Polarization angle adjusting device and code scanning equipment using same

Abstract

The utility model provides a polarization angle adjusting device and a code scanning device using the same, the polarization angle adjusting device comprises a first mounting seat, a second mounting seat, a third mounting seat, a coil, a spring and a polaroid, and the polaroid is arranged on a positioning step on the inner wall of the second mounting seat. The first mounting seat is provided with a first gear, and the second mounting seat is provided with a second upper gear and a second lower gear; the third mounting seat is provided with a third gear; the first gear is opposite to the second upper gear, and the second lower gear is opposite to the third gear; the multiple teeth of the third gear and the multiple teeth of the first gear are arranged in a staggered mode. In the application, the second mounting seat is rotated by using coil power-on and power-off control and a matching structure among the gears, so that the angle of the polarizer is changed. The polarization angle adjusting device provided by the utility model adopts a modular structure, is convenient to mount, dismount and maintain, facilitates integration of code scanning equipment, and can reduce labor cost and time cost.

Description

Technical Field

[0001] This utility model relates to the field of optical polarization technology, and in particular to a polarization angle adjustment device and a barcode scanning device using the same. Background Technology

[0002] Barcode scanning devices are commonly used to read and identify barcodes or QR codes that record information about goods, completing information collection and input for computers, and are widely used in the field of Internet of Things (IoT) technology. Polarized illumination structures, due to their unique physical properties, are often used to solve the problem of glare from scanned objects. They can filter out highly reflective light, thereby improving the barcode recognition rate. To meet the polarized illumination requirements of various application scenarios, a polarization adjustment device is needed to adjust the angle of the polarizer. Currently, the polarization adjustment device in barcode scanning devices generally uses a motor to drive the polarizer to rotate, thereby adjusting the polarization angle. However, in practical applications, the motor-driven structure requires a large amount of space, which is not conducive to the integration of barcode scanning devices; in addition, the motor and polarizer are installed separately in the barcode scanning device, making modular installation and disassembly impossible. Utility Model Content

[0003] One objective of this invention is to address the shortcomings of existing technologies by proposing a polarization angle adjustment device. This device achieves polarization angle adjustment through coil energization and de-energization, as well as a gear-driven structure. It adopts a modular structure, which facilitates installation and disassembly, makes maintenance easier, and reduces labor and time costs.

[0004] The second objective of this utility model is to address the shortcomings of existing technologies by proposing a barcode scanning device. This barcode scanning device employs the aforementioned polarization angle adjustment device, which facilitates integration and allows for easy adjustment of the polarization angle according to usage requirements, thereby improving the barcode recognition rate.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] According to a first aspect of the present invention, a polarization angle adjustment device is provided, the polarization angle adjustment device comprising a first mounting base, a second mounting base, a third mounting base, a coil, a spring, and a polarizer.

[0007] The first mounting base, the second mounting base, and the third mounting base are all annular structures. The second mounting base is movably disposed between the first mounting base and the second mounting base. The third mounting base is provided with a mounting groove, and the coil and the spring are respectively disposed in the mounting groove. The second mounting base is made of iron. The inner wall of the second mounting base is provided with an inwardly protruding positioning step, and the polarizer is disposed on the positioning step.

[0008] The first mounting base has a first gear facing downwards on its inner side; the second mounting base has a second upper gear facing upwards on its inner side; the second mounting base has a second lower gear facing downwards on its inner side; the third mounting base has a third gear facing upwards on its inner side; the first gear is opposite to the second upper gear, and the second lower gear is opposite to the third gear; the rotation direction of the second upper gear is opposite to that of the second lower gear, the rotation direction of the first gear is the same as that of the second upper gear, and the rotation direction of the second lower gear is the same as that of the third gear, and the multiple teeth of the third gear are staggered with the multiple teeth of the first gear.

[0009] Preferably, each gear tooth has a ramp surface and a tooth tip, the tooth tip of the first gear corresponds to the ramp surface of the tooth of the third gear, and the tooth tip of the third gear corresponds to the ramp surface of the tooth of the first gear.

[0010] Preferably, the second upper gear and the second lower gear are symmetrical vertically.

[0011] Preferably, the outer side of the first mounting base is provided with a first connecting portion, and the outer side of the third mounting base is provided with a second connecting portion. The first connecting portion and the second connecting portion protrude from the second mounting base, and the first connecting portion and the second connecting portion are connected by screws.

[0012] Preferably, the second mounting base has a spring groove corresponding to the mounting slot, the upper end of the spring is located in the spring groove, and the lower end of the spring is fixed to the bottom of the mounting slot.

[0013] Preferably, the side wall of the third mounting base is provided with a terminal post, which passes through the mounting groove and is connected to the coil.

[0014] Preferably, a first channel is formed inside the first mounting base, a second channel is formed inside the second mounting base, and a third channel is formed inside the third mounting base. The first channel, the second channel, and the third channel are coaxially arranged, and the positioning step protrudes towards the second channel.

[0015] Preferably, the polarization angle adjustment device further includes a lamp plate polarizer, which is disposed above the third mounting base. The lamp plate polarizer has a through hole in the middle, which is coaxially arranged with the polarizer, and the diameter of the through hole is not less than the diameter of the polarizer.

[0016] According to a second aspect of the present invention, a barcode scanning device is provided, the barcode scanning device including the polarization angle adjustment device as described above.

[0017] Preferably, the scanning device further includes a lens, which is disposed inside the third mounting base in the polarization angle adjustment device.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This utility model's polarization angle adjustment device adopts a modular structure, occupying little space, facilitating installation and disassembly, and simplifying maintenance, thereby reducing labor and time costs. In application, when the coil is energized, it exerts an attractive force on the iron second mounting base, causing it to move downwards. The engagement of the third gear and the second lower gear then causes the second mounting base to rotate. When the coil is de-energized, the attractive force disappears, and the spring drives the second mounting base upwards. The engagement of the second upper gear and the first gear then causes the second mounting base to rotate again, thus changing the angle of the polarizer.

[0020] The barcode scanning device of this invention adopts the above-mentioned polarization angle adjustment device, which makes it convenient to adjust the polarization angle according to the usage requirements and can improve the barcode recognition rate. At the same time, the polarization angle adjustment device adopts a modular structure, which is convenient for installation and disassembly, easy for maintenance, and easy to realize the integration of barcode scanning devices, thereby reducing labor and time costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the disassembled structure of the polarization angle adjustment device according to some embodiments of the present invention.

[0022] Figure 2 This is a schematic diagram of the combined structure of the polarization angle adjustment device in some embodiments of this utility model.

[0023] Figure 3 This is a partial cross-sectional view of a polarization angle adjustment device according to some embodiments of the present invention.

[0024] Figure 4 This is another partial cross-sectional view of the polarization angle adjustment device according to some embodiments of the present invention.

[0025] Figure 5 This is a partial structural schematic diagram of the first gear in some embodiments of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure of the first mounting base, the second mounting base, and the third mounting base in their initial state.

[0027] Figure 7 This is a schematic diagram of the movement of the second mounting base after the coil is energized.

[0028] Figure 8 This is a schematic diagram showing the structure when the coil is energized and completely adheres to the second mounting base.

[0029] Figure 9 This is a schematic diagram of the movement of the second mounting base after the coil is de-energized.

[0030] Figure 10 This is a schematic diagram of the structure after the second mounting base moves into place after the coil is de-energized.

[0031] Figure 11 This is a schematic diagram of the polarization angle adjustment device according to other embodiments of the present invention.

[0032] Figure 12 This is a cross-sectional view of a barcode scanning device according to some embodiments of the present invention.

[0033] In the diagram, 10-first mounting base, 11-first gear, 111-tooth, 112-sloping surface, 113-tooth tip, 12-first connecting part, 13-screw, 14-first channel, 20-second mounting base, 21-positioning step, 22-second upper gear, 23-second lower gear, 24-spring groove, 25-second channel, 30-third mounting base, 31-mounting groove, 32-third gear, 33-second connecting part, 34-terminal, 35-third channel, 40-coil, 50-spring, 60-polarizer, 70-lamp plate polarizer, 71-through hole, 80-lens. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0035] In the description of this utility model, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects. Furthermore, the words "one" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates at least two.

[0036] In the description of this utility model, references to "one embodiment" or "some embodiments" mean that one or more embodiments of the utility model include the specific features, structures, or characteristics described in connection with that embodiment. Therefore, the phrases "one embodiment," "some embodiments," "other embodiments," "and other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0037] According to a first aspect of this utility model, a polarization angle adjustment device is provided. (Refer to...) Figures 1 to 4 In some embodiments, the polarization angle adjustment device includes a first mounting base 10, a second mounting base 20, a third mounting base 30, a coil 40, a spring 50, and a polarizer 60.

[0038] Specifically, the first mounting base 10, the second mounting base 20, and the third mounting base 30 are all annular structures, and are coaxially arranged sequentially. The second mounting base 20 is movably disposed between the first mounting base 10 and the second mounting base 30. The third mounting base 30 has a mounting groove 31, in which the coil 40 and the spring 50 are respectively disposed. The second mounting base 20 is made of iron. The inner wall of the second mounting base 20 has an inwardly protruding positioning step 21, on which a polarizer 60 is disposed, and the polarizer 60 is coaxially arranged with the second mounting base 20. The spring 50 is in a compressed state.

[0039] According to the principle of electromagnetic induction, when the coil 40 is energized, it generates a magnetic field, which attracts the iron second mounting base 20, allowing the second mounting base 20 to move towards the coil 40. When the coil 40 is de-energized, the magnetic field disappears, and the coil 40 no longer attracts the second mounting base 20. At this time, the spring 50, which is in a compressed state, exerts an upward elastic force on the second mounting base 20, causing the second mounting base 20 to move away from the coil 50.

[0040] A first gear 11 is disposed on the inner side of the first mounting base 10 facing downwards, and multiple teeth of the first gear 11 are arranged circumferentially around the first mounting base 10. A second upper gear 22 is disposed on the inner side of the second mounting base 20 facing upwards, and multiple teeth of the second upper gear 22 are arranged circumferentially around the second mounting base 20; a second lower gear 23 is disposed on the inner side of the second mounting base 20 facing downwards, and multiple teeth of the second lower gear 23 are arranged circumferentially around the second mounting base 20. A third gear 32 is disposed on the inner side of the third mounting base 30 facing upwards, and multiple teeth of the third gear 32 are arranged circumferentially around the third mounting base 30. The first gear 11 is opposite to the second upper gear 22, and the second lower gear 23 is opposite to the third gear 32. The rotation direction of the second upper gear 22 is opposite to that of the second lower gear 23. The rotation direction of the first gear 11 is the same as that of the second upper gear 22. The rotation direction of the second lower gear 23 is the same as that of the third gear 32. The multiple teeth of the third gear 32 are interleaved with the multiple teeth of the first gear 11.

[0041] It should be noted that the helix direction of the aforementioned gears is a key parameter inherent to the gear itself. It refers to the relationship between the rotation direction at the input end and the rotation direction at the output end after the gear is fixed. Typically, the input end is used as a reference to determine whether the gear's helix direction is clockwise or counterclockwise. The helix direction of each gear can also be determined using the following method: Facing the gear tooth width directly, observe the direction of the teeth. Gears with teeth skewed to the left are left-handed gears, and those skewed to the right are right-handed gears.

[0042] In the application, when coil 40 is energized, it generates a magnetic field, which attracts the iron second mounting base 20, causing it to move downwards. The engagement of the third gear 32 and the second lower gear 23 then rotates the second mounting base 20. When coil 40 is de-energized, the attraction disappears, and spring 50 drives the second mounting base 20 upwards. The engagement of the second upper gear 22 and the first gear 11 then rotates the second mounting base 20 again, thereby changing the angle of the polarizer 60. This polarization angle adjustment device adopts a modular structure, occupying little space, facilitating installation and disassembly, simplifying maintenance, and reducing labor and time costs.

[0043] Each gear tooth has a bevel and a tooth tip. (Refer to...) Figure 5 As shown, in the first gear 11, the teeth 111 have a ramp surface 112 and a tooth tip 113. In some preferred embodiments, the tooth tip of the teeth in the first gear 11 corresponds to the ramp surface of the teeth in the third gear 32, and the tooth tip of the teeth in the third gear 32 corresponds to the ramp surface of the teeth in the first gear 11.

[0044] In some preferred embodiments, the second upper gear 22 and the second lower gear 23 are symmetrical.

[0045] Reference Figure 3In some preferred embodiments, the outer side of the first mounting base 10 is provided with a first connecting portion 12, and the outer side of the third mounting base 30 is provided with a second connecting portion 33. The first connecting portion 12 and the second connecting portion 33 protrude from the second mounting base 20, and the first connecting portion 12 and the second connecting portion 33 are connected by screws.

[0046] Reference Figure 3 In some preferred embodiments, the second mounting base 20 has a spring groove 24 corresponding to the mounting groove 31, the upper end of the spring 50 is disposed in the spring groove 24, and the lower end of the spring 50 is fixed to the bottom of the mounting groove 31. Further, the spring 50 can be disposed on the outside or inside of the coil 40. Figure 3 As shown, in one embodiment, the spring 50 is located outside the coil 40.

[0047] Furthermore, the side wall of the third mounting base 30 is provided with a terminal 34, which passes through the mounting groove 31 and is connected to the coil 40. The terminal 34 is used to pass current into the coil 40, thereby facilitating the control of the energized and de-energized state of the coil 40. The terminal 34 may include a positive terminal or a negative terminal.

[0048] Reference Figure 2 The first mounting base 10 forms a first channel 14 inside, the second mounting base 20 forms a second channel 25 inside, and the third mounting base 30 forms a third channel 35 inside. The first channel 14, the second channel 25, and the third channel 35 are coaxially arranged, and the positioning step 21 protrudes towards the second channel 25. The first channel 14, the second channel 25, and the third channel 35 are used to allow light to pass through. After the polarizer 60 is installed on the limiting step, it can allow light with the same vibration direction to be transmitted, while filtering out light with a different vibration direction.

[0049] Reference Figure 6 The teeth 231 of the second lower gear 23 are symmetrical to the teeth 221 of the second upper gear 22. Initially, the second upper gear 22 meshes with the first gear 11, with teeth 221 positioned to the right of teeth 114. (Refer to...) Figure 7 As indicated by the middle arrow, after the coil 40 is energized, it attracts the second mounting base 20. The second mounting base 20 moves downward. When the tooth 231 abuts against the tooth in the lower third gear, under the guidance of that tooth, the tooth 231 rotates to the left and moves downward until the second lower gear 23 meshes with the third gear 32 (corresponding to...). Figure 8 (As shown in the diagram), at this point, the second mounting base 20 has rotated to the left by a certain angle. (Refer to...) Figure 9As indicated by the middle arrow, after the coil 40 is de-energized, the second mounting base 20 is released, and the second mounting base 20 moves upward. When the tooth 221 abuts against the upper tooth 114, under the guidance of the tooth 114, the tooth 221 rotates to the left and moves upward until the second upper gear 22 meshes with the first gear 11 (corresponding to...). Figure 10 (As shown in the diagram), at this point, the second mounting base 20 rotates to the left by a certain angle, and the tooth 221 rotates to the left side of the tooth 114. Thus, the polarization angle is adjusted through the energization and de-energization control of the coil 40 and the gear meshing structure, facilitating operation and achieving modularity for easy installation and disassembly.

[0050] It should be noted that the number of teeth in the first gear 11, the second upper gear 22, the second lower gear 23, and the third gear 32, as well as the slope of the ramp, can be reasonably set according to actual needs.

[0051] Reference Figure 11 In other embodiments, the polarization angle adjustment device further includes a lamp plate polarizer 70, which is disposed above the third mounting base 30. A through hole 71 is provided in the center of the lamp plate polarizer 70, coaxially arranged with the polarizer 60, and the diameter of the through hole 71 is not less than the diameter of the polarizer 60. The lamp plate polarizer 70 cooperates with the polarizer 60 to achieve polarized lighting and reduce highly reflective light.

[0052] According to a second aspect of this utility model, a barcode scanning device is provided. (Refer to...) Figure 12 The barcode scanning device includes the polarization angle adjustment device described above. The barcode scanning device of this invention uses the aforementioned polarization angle adjustment device, which allows for convenient adjustment of the polarization angle according to usage requirements, thereby improving the barcode recognition rate. Simultaneously, the polarization angle adjustment device adopts a modular structure, facilitating installation and disassembly, simplifying maintenance, and enabling the integration of the barcode scanning device, thus reducing labor and time costs.

[0053] Furthermore, the scanning device also includes a lens 80, which is located inside the third mounting base 30 in the polarization angle adjustment device, that is, the lens 80 is located in the third channel 35.

[0054] In application, the lamp plate polarizer 70 allows light with the same vibration direction to pass through while filtering out light with a different vibration direction. After light enters the first channel 14 and the second channel 25 through the through hole 71, the polarizer 60 filters out light with a different vibration direction, allowing only light with the same vibration direction to pass through and enter the lens 80, thereby filtering out highly reflective light and improving the barcode recognition rate.

[0055] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A polarization angle adjustment device, characterized in that: The polarization angle adjustment device includes a first mounting base, a second mounting base, a third mounting base, a coil, a spring, and a polarizer; The first mounting base, the second mounting base, and the third mounting base are all annular structures. The second mounting base is movably disposed between the first mounting base and the second mounting base. The third mounting base is provided with a mounting groove, and the coil and the spring are respectively disposed in the mounting groove. The second mounting base is made of iron. The inner wall of the second mounting base is provided with an inwardly protruding positioning step, and the polarizer is disposed on the positioning step. The first mounting base has a first gear facing downwards on its inner side; the second mounting base has a second upper gear facing upwards on its inner side; the second mounting base has a second lower gear facing downwards on its inner side; the third mounting base has a third gear facing upwards on its inner side; the first gear is opposite to the second upper gear, and the second lower gear is opposite to the third gear; the rotation direction of the second upper gear is opposite to that of the second lower gear, the rotation direction of the first gear is the same as that of the second upper gear, and the rotation direction of the second lower gear is the same as that of the third gear, and the multiple teeth of the third gear are staggered with the multiple teeth of the first gear.

2. The polarization angle adjustment device as described in claim 1, characterized in that: Each gear tooth has a ramp surface and a tooth tip, the tooth tip of the first gear corresponds to the ramp surface of the tooth in the third gear, and the tooth tip of the third gear corresponds to the ramp surface of the tooth in the first gear.

3. The polarization angle adjustment device as described in claim 1, characterized in that: The second upper gear and the second lower gear are symmetrical.

4. The polarization angle adjustment device as described in claim 1, characterized in that: The first mounting base has a first connecting part on its outer side, and the third mounting base has a second connecting part on its outer side. The first connecting part and the second connecting part protrude from the second mounting base, and the first connecting part and the second connecting part are connected by screws.

5. The polarization angle adjustment device as described in claim 1, characterized in that: The second mounting base has a spring groove corresponding to the mounting slot, the upper end of the spring is located in the spring groove, and the lower end of the spring is fixed to the bottom of the mounting slot.

6. The polarization angle adjustment device as described in claim 1, characterized in that: The side wall of the third mounting base is provided with a terminal post, which passes through the mounting groove and is connected to the coil.

7. The polarization angle adjustment device as described in claim 1, characterized in that: The first mounting base has a first channel inside, the second mounting base has a second channel inside, and the third mounting base has a third channel inside. The first channel, the second channel, and the third channel are coaxially arranged, and the positioning step protrudes toward the second channel.

8. The polarization angle adjustment device as described in claim 1, characterized in that: The polarization angle adjustment device further includes a lamp plate polarizer, which is disposed above the third mounting base. The lamp plate polarizer has a through hole in the middle, which is coaxially arranged with the polarizer, and the diameter of the through hole is not less than the diameter of the polarizer.

9. A barcode scanning device, characterized in that: The scanning device includes a polarization angle adjustment device as described in any one of claims 1-8.

10. The barcode scanning device as described in claim 9, characterized in that: The scanning device also includes a lens, which is located inside the third mounting base in the polarization angle adjustment device.

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