Large-aperture small-view liquid lens code reader

Abstract

The utility model relates to a large-aperture small-view liquid lens code reader comprising a housing which comprises an upper housing, a middle housing and a bottom housing; the lens module is arranged in the shell through a mounting bracket, and the lens module comprises a main control board, a power signal I O board, a SENSOR module, a switching cylinder, a telephoto lens and a large-aperture liquid lens; wherein the main control board, the SENSOR module and the power supply signal I < O > board are fixedly arranged on the mounting bracket, and the main control board is electrically connected with the power supply signal I < O > board; the telephoto lens is embedded into the inner side of the mounting bracket, the SENSOR module is connected with one end of the telephoto lens through the lens mounting seat and the adapter ring in sequence, and the other end of the telephoto lens is connected with the large-aperture liquid lens through the adapter cylinder; according to the utility model, the large-aperture liquid lens and the telephoto lens are combined by using the adapter cylinder, a wider choice is provided for lens selection in manufacturing code reader equipment with small visual field and high precision, and in addition, the flexible shell structure design is adopted, so that the production process can be effectively improved, and the cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of code scanners, in particular to a large-caliber and small-viewing-field liquid lens code reader. Background Art

[0002] In the existing visual product structure of code readers, as the decoded two-dimensional codes become smaller and smaller, the requirements for the selection of lenses are becoming higher and higher, and the size of the lenses is also increasing. The existing liquid lenses have a light clearance diameter mostly within the range of 2.5mm, and lenses with a large light clearance diameter cannot be used at all. Therefore, most of the existing liquid lens zoom code reader devices are still equipped with small lenses with small apertures. The lens selection is only for conventional models, which makes it difficult to find suitable lenses for liquid lens code readers, which brings many limitations in actual application scenarios. Utility Model Content

[0003] To this end, the technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a large-aperture, small-field-of-view liquid lens code reader. The large-aperture liquid lens and the telephoto lens are combined by using an adapter tube, which provides a wider range of choices for the selection of lenses in the manufacture of code reader equipment with a small field of view and high precision. It can be matched with telephoto lenses of various specifications, thus overcoming the limitations of lens selection. In addition, the flexible shell structure design can effectively improve the production process and reduce costs.

[0004] In order to solve the above technical problems, the utility model provides a large-caliber and small-field-of-view liquid lens code reader, comprising:

[0005] A shell, the shell comprising an upper shell, a middle shell and a bottom shell;

[0006] A lens module is arranged inside the housing through a mounting bracket, and the lens module includes a main control board, a power signal IO board, a SENSOR module, an adapter tube, a telephoto lens and a large-caliber liquid lens; wherein the main control board, the SENSOR module and the power signal IO board are all fixedly arranged on the mounting bracket, and the main control board is electrically connected to the power signal IO board to realize power supply and signal transmission; the telephoto lens is embedded in the inner side of the mounting bracket, and the SENSOR module is connected to one end of the telephoto lens through a lens mounting seat and an adapter ring in sequence, and the other end of the telephoto lens is connected to the large-caliber liquid lens through an adapter tube;

[0007] A light source module is arranged at the end of the shell, and the light source module includes a mounting plate, a light source lamp board and a focusing lens. The mounting plate is arranged at the end of the large-aperture liquid lens, and the light source lamp board is arranged on the mounting plate. The light source lamp board is electrically connected to the power signal IO board; a through hole concentric with the telephoto lens is provided at the center position of the light source lamp board, and a focusing lens is provided on the outer side of the light source lamp board.

[0008] In one embodiment of the utility model, an aiming light board is further provided on the mounting plate, and the aiming light board is electrically connected to the light source light board via a flexible flat cable.

[0009] In one embodiment of the utility model, a light-transmitting hole is provided in the middle of the aiming light board, a focusing tube is provided on the light-transmitting hole, and LED patch lights are provided on both sides of the focusing tube on the aiming light board.

[0010] In one embodiment of the present invention, the aiming light board and the light source light board are supported and fixed by an elastic connector.

[0011] In one embodiment of the present invention, the condenser lens includes a lens mounting plate and a concave-convex lens, and the concave-convex lenses include four lenses, which are respectively arranged at four corners of the lens mounting plate.

[0012] In one embodiment of the present invention, a light-shielding tube is provided in the middle of the lens mounting plate.

[0013] In one embodiment of the utility model, the housing comprises an upper housing, a middle housing and a bottom housing, the end surface of the upper housing is provided with a window glass; the upper surface of the middle housing is provided with an indicator light panel and a key panel.

[0014] In an embodiment of the present invention, rubber sealing rings are provided between the middle shell and the upper shell and the bottom shell.

[0015] In one embodiment of the utility model, it also includes a power data line, which extends into the shell and is electrically connected to the main control board.

[0016] In an embodiment of the present invention, the lens mounting seat is provided with an internal thread, and the adapter ring is threadedly connected to the lens mounting seat.

[0017] In one embodiment of the utility model, the large-aperture liquid lens comprises a lens barrel and a liquid lens disposed in the lens barrel, and a pressure ring is disposed in the lens barrel on the outer side of the liquid lens.

[0018] The above technical solution of the utility model has the following advantages compared with the prior art:

[0019] The utility model discloses a large-aperture, small-field-of-view liquid lens code reader, which combines a large-aperture liquid lens with a telephoto lens by utilizing an adapter tube. This method can combine a large-aperture, telephoto lens with a large-aperture liquid lens, thereby overcoming the limitation of lens selection in designing and manufacturing a telephoto, small-field-of-view liquid lens code reader device. In this way, a wider range of choices is provided for lens selection in manufacturing a code reader device with a small field of view and high precision. Moreover, the telephoto lens can be matched with various specifications, and it is no longer limited to designing and selecting a lens with a small shape and a small aperture. In addition, with a flexible shell structure design, the production process can be effectively improved and the cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0021] Figure 1 This is a schematic diagram of the external structure of a large-aperture, small-field-of-view liquid lens code reader in a preferred embodiment of the utility model;

[0022] Figure 2 yes Figure 1 The schematic diagram of the exploded structure of the large-aperture, small-field-of-view liquid lens code reader shown;

[0023] Figure 3 yes Figure 1 The cross-sectional structure diagram of a large-aperture, small-field-of-view liquid lens code reader is shown;

[0024] Figure 4 yes Figure 1 The schematic diagram of the structure of the lens module and the light source module of the large-aperture and small-field-of-view liquid lens code reader is shown;

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure of the adapter tube, telephoto lens and large-aperture liquid lens in the lens module shown;

[0026] Figure 6 for Figure 5 A schematic structural diagram of a large-aperture liquid lens of the lens module shown;

[0027] Explanation of the reference numerals in the specification: 1. outer shell; 11. upper shell; 12. middle shell; 121. indicator light panel; 122. key panel; 13. bottom shell; 2. lens module; 21. main control board; 22. power signal IO board; 23. SENSOR module; 24. adapter tube; 25. telephoto lens; 26. large-aperture liquid lens; 261. lens barrel; 262. liquid lens; 263. pressure ring; 27. lens mounting seat; 28. adapter ring; 3. mounting bracket; 4. light source module, mounting plate; 42. light source lamp board; 43. focusing lens; 431. lens mounting plate; 432. concave-convex lens; 433. shading tube; 44. aiming lamp board; 45 elastic connector; 46. focusing tube; 47. patch lamp; 100. rubber sealing ring. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0029] Reference Figure 1-6As shown, the utility model described in a large-caliber and small-field-of-view liquid lens code reader comprises: a housing 1, wherein the housing 1 comprises an upper housing 11, a middle housing 12 and a bottom housing 13; the housing 1 as a whole is divided into three parts for connection and installation, and can be cut and processed according to different lengths of application, which can effectively reduce material costs, improve production and assembly processes, and reduce costs; a lens module 2, which is arranged inside the housing 1 through a mounting bracket 3, and the lens module 2 comprises a main control board 21, a power signal IO board 22, a SENSOR module 23, a switching tube 24, a telephoto lens 25 and a large-caliber liquid lens 26; wherein the main control board 21, the SENSOR module 23 and the power signal IO board 22 are all fixedly arranged on the mounting bracket 3, and the SENSOR module is a sensor. The sensor module combines PCBA and chip into one, and is a key module for realizing the functions of code reading, image taking and shooting; the main control board 21 is electrically connected to the power signal IO board 22 to realize power supply and signal transmission; the SENSOR module 23 is connected to the socket port on the main control board 21 through a flat cable; the telephoto lens 25 is embedded in the inner side of the mounting bracket 3, and the SENSOR module 23 is connected to one end of the telephoto lens 25 through a lens mounting seat 27 and an adapter ring 28 in sequence, and the other end of the telephoto lens 25 is connected to the large-aperture liquid lens 26 through an adapter tube 24; the adapter tube 24 can be designed according to the appearance of different telephoto lenses 25, and the lens mounting seat 27 is provided with an internal thread, and the adapter ring 28 is threadedly connected to the lens mounting seat 27. The light source module 4 is arranged at the end of the shell 1, and the light source module 4 includes a mounting plate 41, a light source lamp board 42 and a focusing lens 43. The mounting plate 41 is arranged at the end of the large-aperture liquid lens 26, and the light source lamp board 42 is arranged on the mounting plate 41. The light source lamp board 42 is one of the internal electronic system layout PCBAs, and is connected to the power signal IO board 22 to realize the normal power supply of the lamp beads; a through hole concentric with the telephoto lens 25 is provided at the center position of the light source lamp board 42, and a through hole concentric with the telephoto lens 25 is provided at the center position of the light source lamp board 42, and a focusing lens 43 is provided on the outer side of the light source lamp board 42.

[0030] Preferably, the telephoto lens 25 is a telephoto lens with a large aperture field of view. The characteristics of this lens are different from the commonly used small field of view lenses. This lens has the characteristics of a large size, a large optical effective light output aperture at the front end of the lens, and a small field of view.

[0031] In addition, the large-aperture liquid lens 26 includes a lens barrel 261 and a liquid lens 262 disposed in the lens barrel 261. A pressure ring 263 is disposed on the outside of the liquid lens 262 in the lens barrel 261. The large-aperture liquid lens 26 is a combined module, a lens with variable optical power, which uses the principle of electrowetting to change the contact angle, surface shape and curvature at the interface of two liquids by changing the voltage, thereby changing the optical power of the lens to achieve the purpose of zooming. The liquid lens is small in size, fast in zooming, without any mechanical movement, low in power consumption, impact-resistant, and long in service life. It can be widely used in the industrial field and is an important direction for performance breakthroughs in mobile terminal camera solutions.

[0032] In this embodiment, the lens mounting seat 27 is a cylindrical plastic part, which is installed just above the sensor module 23. Its function is to seal and protect the sensor module 23 from dust and dirt, and to prevent external light from entering the sensor module 23 and affecting normal operation. The adapter ring 28 is a circular metal structure with threads, which is mainly used for the installation and fixation of the telephoto lens 25 and the adapter tube 24 at the rear end. Since the front end is connected to the sensor module 23, it also plays a role in ensuring the concentricity of the telephoto lens 25 when it is installed.

[0033] Furthermore, an aiming light board 44 is also provided on the mounting plate 41, and the aiming light board 44 is connected to the light source light board 42 via an elastic connector 45, and the aiming light board 44 is electrically connected to the light source light board 42 via a flexible flat cable. A light-transmitting hole is provided in the middle of the aiming light board 44, and a focusing tube 46 is provided on the light-transmitting hole. LED patch lights 47 are provided on both sides of the focusing tube 46 on the aiming light board 44. The aiming light board 44 is designed in front of the SENSOR module PCBA, and is used for aiming and positioning when the entire code reader is working, so that the code reader can quickly capture the decoding position when working; the focusing tube 46 is a circular cylindrical structure, and a light hole is designed inside according to the focal length of the lamp bead and the amount of light passing through. When the lamp bead emits light, it is guided to the focusing lens 43 through this focusing tube 46. After the light is emitted by the focusing lens 43, a small circular light spot will be formed, which is used for aiming and positioning;

[0034] Furthermore, the condenser lens 43 includes a lens mounting plate 431 and four concave-convex lenses 432 arranged on the lens mounting plate 431, and a light shielding tube 433 is arranged in the middle of the lens mounting plate 431. The condenser lens in this embodiment is a concave-convex lens; the condenser lens 43 is designed and manufactured using a transparent optical grade PC material, and four groups of concave-convex lenses 432 matching the lamp beads are designed according to the requirements of the working field size of the code reader. When it is installed above the light source lamp board 42, the lamp beads can emit light through the concave-convex lenses 432 to form a bright light spot in the field of view, which has good uniformity and can meet the fill light function required when the code reader is working.

[0035] Preferably, the light-shielding tube 433 is a circular cylindrical structure, which is mainly used to be installed in front of the lens to block external light and prevent the light reflected by other objects after the light source emits light from entering the lens and affecting the imaging.

[0036] This embodiment also includes a power data line 5, which extends into the housing 1 and is electrically connected to the main control board 21. The power data line 5 is a power supply and signal transmission data line for the code reader; the data line connector is installed on the housing and connects the control module and the host to realize power supply and signal transmission;

[0037] Preferably, the upper shell 11 is a metal structural member, which is one of the main structural members constituting the overall shell, and its interior is used to install the aiming light board, light source module and lens module. Its front end is made through to facilitate the lens light output and unobstructed vision, and is designed with an installation slot for installing window glass; the middle shell 12 is a square metal structural member, and its interior is made through to make it similar to a profile structure. The main characteristics of this structure are that it facilitates processing difficulty, reduces manufacturing costs, and facilitates installation process; secondly, it is made into a profile installation structure, which is convenient for cutting and processing according to different length requirements when used, so as to effectively avoid the situation that the middle shell structure and the bottom shell are made into one piece due to excessive length, which causes great processing difficulty and unchanged assembly; the bottom shell 13 is a metal structural member, which is one of the main structural members constituting the overall shell, and its interior is used to install circuit board modules and some structural members.

[0038] A rubber sealing ring 100 is provided between the middle shell 12 and the upper shell 11 and the bottom shell 13. The rubber sealing ring 100 can enhance the sealing performance of the connection between the middle shell 12 and the upper shell 11 and the bottom shell 13, and can effectively prevent water from penetrating from the gaps between adjacent shells. In addition, a window glass 6 is provided on the end face of the upper shell 11; the window glass 6 is installed in the installation groove of the end face of the upper shell 11, which plays a role of sealing and light transmission. An indicator light panel 121 and a key panel 122 are provided on the upper surface of the middle shell 12. The indicator light panel 121 is made of PVC material to be backed with glue, and its function is to be installed at the position of the indicator light through hole of the middle shell, which plays a role of both light transmission and dustproof and waterproof; the key panel 122 is made of PVC material to be backed with glue, and its function is to be installed on the contact hole between the silicone key and the middle shell structural member, which plays a role of sealing the missing hole of the silicone key and dustproof;

[0039] In this embodiment, a decoding button 221 is provided on the power signal IO board 22 for realizing a decoding trigger button of a code reader. The decoding button 221 is designed with a soft silicone material.

[0040] During the specific installation, the SENSOR module 23 is first installed on the bottom shell 13, and the telephoto lens 25 is installed above the SENSOR module 23. The main control board 21 and the power signal IO board 22 are installed on both sides. In this way, the length space in the direction of the lens can be effectively utilized, avoiding the space occupied by the large telephoto lens 25; secondly, a large-aperture liquid lens 26 is installed in front of the telephoto lens 25. The light-transmitting aperture of the liquid lens is 4.0 mm, which is a relatively large aperture in existing applications and twice the aperture of existing liquid lenses. It is combined with the telephoto lens 25 using an adapter tube 24. The adapter tube 24 can be designed according to the appearance of different telephoto lenses 25. In this way, the large-aperture telephoto lens 25 can be combined with the large-aperture large-aperture liquid lens 26 for application, which provides a wider range of choices for the selection of lenses in the manufacture of code readers with small fields of view and high precision.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A large-aperture, small-field-of-view liquid lens barcode reader, characterized in that: include: A shell, the shell comprising an upper shell, a middle shell and a bottom shell; A lens module is arranged inside the housing through a mounting bracket, and the lens module includes a main control board, a power signal IO board, a SENSOR module, an adapter tube, a telephoto lens and a large-caliber liquid lens; wherein the main control board, the SENSOR module and the power signal IO board are all fixedly arranged on the mounting bracket, and the main control board is electrically connected to the power signal IO board to realize power supply and signal transmission; the telephoto lens is embedded in the inner side of the mounting bracket, and the SENSOR module is connected to one end of the telephoto lens through a lens mounting seat and an adapter ring in sequence, and the other end of the telephoto lens is connected to the large-caliber liquid lens through an adapter tube; A light source module is arranged at the end of the shell, and the light source module includes a mounting plate, a light source lamp board and a focusing lens. The mounting plate is arranged at the end of the large-aperture liquid lens, and the light source lamp board is arranged on the mounting plate. The light source lamp board is electrically connected to the power signal IO board; a through hole concentric with the telephoto lens is provided at the center position of the light source lamp board, and a focusing lens is provided on the outer side of the light source lamp board.

2. The large-aperture, small-field-of-view liquid lens code reader according to claim 1, characterized in that: The mounting plate is also provided with an aiming light board, and the aiming light board is electrically connected to the light source light board through a flexible flat cable.

3. The large-aperture, small-field-of-view liquid lens code reader according to claim 2, characterized in that: A light-transmitting hole is arranged in the middle of the aiming light board, a light-collecting tube is arranged on the light-transmitting hole, and LED patch lights are arranged on both sides of the light-collecting tube on the aiming light board.

4. The large-aperture, small-field-of-view liquid lens code reader according to claim 2, characterized in that: The aiming light board and the light source light board are supported and fixed by an elastic connector.

5. The large-aperture, small-field-of-view liquid lens code reader according to claim 1, characterized in that: The condenser lens comprises a lens mounting plate and a concave-convex lens. The concave-convex lens comprises four lenses which are respectively arranged at four corners of the lens mounting plate.

6. The large-aperture, small-field-of-view liquid lens code reader according to claim 5, characterized in that: A light-shielding cylinder is arranged in the middle of the lens mounting plate.

7. The large-aperture, small-field-of-view liquid lens code reader according to claim 1, characterized in that: A window glass is arranged on the end surface of the upper shell; an indicator light panel and a key panel are arranged on the upper surface of the middle shell.

8. The large-aperture, small-field-of-view liquid lens code reader according to claim 7, characterized in that: Rubber sealing rings are arranged between the middle shell and the upper shell and the bottom shell.

9. The large-aperture, small-field-of-view liquid lens code reader according to claim 1, characterized in that: It also includes a power data line, which extends into the shell and is electrically connected to the main control board.

10. The large-aperture, small-field-of-view liquid lens code reader according to claim 1, characterized in that: The large-aperture liquid lens comprises a lens barrel and a liquid lens arranged in the lens barrel, and a pressure ring is arranged in the lens barrel on the outer side of the liquid lens.

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