A code reader and code reading system

Abstract

This application relates to the field of intelligent barcode reader technology, specifically to a barcode reader and reading system. The barcode reader adopts a modular design, comprising independent modules such as an optical transceiver assembly, a lens cover, and a lens assembly. The lens cover, on the one hand, covers the optical transceiver assembly to seal the precision components such as the photosensitive unit and the lens unit, isolating them from the external environment and preventing them from being contaminated. On the other hand, the lens is separately mounted on a lens holder to form a lens assembly. The lens assembly is detachably connected to the lens cover and together with the lens cover and the optical transceiver assembly, forms the barcode reader. This improves the adaptability of the barcode reader structure and enables rapid replacement of the various components of the barcode reader.

Description

Technical Field

[0001] This application relates to the field of intelligent barcode reader technology, specifically to a barcode reader and a barcode reading system. Background Technology

[0002] A barcode reader is an electronic device that reads information by scanning graphic codes on objects or packaging. Its purpose is to identify and read information from graphic codes such as barcodes and QR codes, converting them into recognizable numbers, text, or other data. With the development of the information age, barcode readers have found widespread application in many fields. In industrial applications, barcode readers are typically used to automatically identify the coded information of products, packaging, and accessories to support automation in material management, production planning, and logistics distribution. In the consumer goods industry, barcode readers can be used in retail stores, supermarkets, and other locations to support fast checkout and inventory management.

[0003] The inventors of this application discovered in their research that different application scenarios require different functionalities and performance from barcode readers. For example, when the surface of the object to be scanned has strong reflectivity, a barcode reader with polarization capabilities is needed. Conversely, in scenarios requiring high image uniformity, a barcode reader with diffuse reflection capabilities is required. Currently available barcode readers have poor structural adaptability and low modularity, making it impossible to quickly replace the various components. Utility Model Content

[0004] In view of the above problems, embodiments of this application provide a barcode reader and a barcode reading system to solve the above-mentioned technical problems in the prior art.

[0005] One aspect of this application provides a code reader, including: an optical transceiver assembly, a lens cover, and a lens assembly;

[0006] The optical transceiver assembly includes a housing, within which a photosensitive unit and a lens unit are disposed; one end of the housing is open, through which the lens unit emits light signals toward the object to be scanned, and through which the photosensitive unit receives light signals reflected by the object to be scanned;

[0007] The lens cover includes a lens cover bracket and a light-transmitting panel. The lens cover bracket is fixedly covered over the opening of the housing to seal the photosensitive unit and the lens unit inside the housing. The light-transmitting panel is disposed on the lens cover bracket at a position opposite to the photosensitive unit and the lens unit.

[0008] The lens assembly includes a lens holder and a lens unit. The lens holder is detachably connected to the lens cover, and the lens unit is disposed on the lens holder at a position opposite to the photosensitive unit and the lens unit.

[0009] In some embodiments, the opening of the housing is provided with a first light-emitting hole and a first light-incoming hole; the light-transmitting panel includes a first light-transmitting panel and a second light-transmitting panel;

[0010] The first light-emitting aperture is disposed opposite to the lens unit, and the first light-transmitting panel is disposed opposite to the first light-emitting aperture;

[0011] The first light-entry hole is disposed opposite to the photosensitive unit, and the second light-transmitting panel is disposed opposite to the first light-entry hole.

[0012] In some embodiments, the lens cover is screwed over the opening of the housing of the optical transceiver assembly.

[0013] In some embodiments, the lens unit further includes a support plate;

[0014] The support plate is fixedly disposed with the lens holder. The support plate is provided with a second light-emitting hole and a second light-entry hole. The second light-emitting hole corresponds to the first light-emitting hole, and the second light-entry hole corresponds to the first light-entry hole.

[0015] The lens unit is disposed on the second light-exit hole and the second light-inlet hole.

[0016] In some embodiments, the lens unit includes a polarizing filter and a polarizing filter;

[0017] The polarizing plate is disposed at the second light-emitting hole on the support plate;

[0018] The polarizer is disposed at the second light-entry hole on the support plate.

[0019] In some embodiments, the lens unit includes a diffuse reflective sheet;

[0020] The diffuse reflector is disposed at the second light-emitting hole on the support plate.

[0021] In some embodiments, the support plate is bonded to the lens holder.

[0022] In some embodiments, a snap-fit ​​interface is provided on the outer side of one edge of the lens cover; a snap-fit ​​protrusion is provided on the inner side of one edge of the lens holder;

[0023] The snap-fit ​​protrusion engages with the snap-fit ​​interface to fasten the lens assembly onto the lens cover.

[0024] In some embodiments, a sealing ring is provided on one side edge of the lens holder facing the lens cover, and the sealing ring is used to seal the lens assembly and the lens cover when the lens assembly is fastened together.

[0025] One aspect of this application provides a code reading system, which includes the code reader and server described in the above embodiments;

[0026] The barcode reader is communicatively connected to the server.

[0027] The server is used to obtain reading information through the code reader and to process the reading information.

[0028] The barcode reader and reading system proposed in this application adopt a modular design, with the barcode reader designed as independent modules such as an optical transceiver assembly, a lens hood, and a lens assembly. The lens hood covers the optical transceiver assembly, sealing the photosensitive unit, lens unit, and other precision components, isolating them from the external environment and preventing them from being contaminated. On the other hand, the lens is separately mounted on a lens holder to form a lens assembly. The lens assembly is detachably connected to the lens hood and together with the lens hood and optical transceiver assembly, it forms the barcode reader. In different application scenarios, when the lens needs to be replaced, it is only necessary to remove the lens assembly from the lens hood and replace it with a new lens assembly, without having to disassemble the lens hood and optical transceiver assembly. This facilitates lens replacement and keeps the photosensitive unit and lens unit in a sealed state, preventing contamination from the external environment when replacing the lens assembly, greatly reducing the risk of damage to precision components and improving the adaptability of the barcode reader in different application scenarios.

[0029] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0030] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0031] Figure 1 This is an overall schematic diagram of the barcode reader provided in the embodiments of this application;

[0032] Figure 2 This is a disassembly diagram of the barcode reader provided in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the lens assembly provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the assembly of the optical transceiver assembly and lens assembly provided in the embodiments of this application.

[0035] The reference numerals in the detailed embodiments are as follows:

[0036] 100. Code reader;

[0037] 110. Optical transceiver assembly; 111. Housing; 112. First light exit hole; 113. First light inlet hole; 114. Fixing plate;

[0038] 120. Lens hood; 121. Lens hood bracket; 122. First light-transmitting panel; 123. Second light-transmitting panel; 125. Fixing hole; 126. Fixing screw; 127. First card slot; 128. Second card slot;

[0039] 130. Lens assembly; 131. Lens holder; 132. Support plate; 133. Second light exit hole; 134. Second light entrance hole; 135. Polarizing filter; 136. Polarizing filter; 137. First snap-fit ​​protrusion; 138. Second snap-fit ​​protrusion. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0046] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] A barcode reader is a commonly used information collection tool. Its core function is to quickly and accurately read information from various barcodes and QR codes. Whether it's a barcode on product packaging, a QR code for payment, or a material code in industrial production, the barcode reader can convert it into readable digital or text information. Currently, barcode readers are widely used in automated information collection and management equipment on production lines / assembly lines in large and medium-sized manufacturing enterprises. This greatly improves the level of manufacturing automation, reduces manual operation, and realizes a mixed-flow, automated, and highly accurate production information collection mode, reducing the occurrence of misreading and missed readings caused by human operation.

[0049] However, different usage scenarios will have different requirements for the functions and performance of barcode readers. For example, in the scanning environment, there is strong light, or when scanning in the open air, the surface of the object to be scanned has strong reflection, then a barcode reader with polarization function is required; while in scenarios where high image uniformity is required, a barcode reader with diffuse reflection function is required.

[0050] To enable barcode readers to perform different functions, such as polarization or diffuse reflection, in various scenarios, different lenses are required for different readers. In existing technologies, because barcode readers are all integrated units, replacement requires specialized tools to disassemble the reader, remove the old lens, replace it with a new one, and then reassemble the reader – a time-consuming, labor-intensive, and inconvenient process. Furthermore, since barcode readers contain precision components such as photosensitive units and lens units, in harsh environments, such as dusty or humid environments, replacing the lens can cause dust or moisture to enter these components, leading to decreased reading accuracy or damage to these precision parts, significantly reducing the adaptability of the barcode reader to different application scenarios.

[0051] In view of this, in order to facilitate the replacement of barcode reader components and improve the adaptability of the barcode reader in different scenarios, the embodiments of this application adopt a modular design, designing the barcode reader as independent modules such as optical transceiver components, lens hood, and lens assembly. The lens hood covers the optical transceiver components, sealing the photosensitive unit, lens unit, and other precision components, isolating them from the external environment and preventing them from being contaminated. On the other hand, the lens is separately set on a lens holder to form a lens assembly. The lens assembly is detachably connected to the lens hood and together with the lens hood and optical transceiver components, it forms the barcode reader. In different application scenarios, when the lens needs to be replaced, it is only necessary to remove the lens assembly from the lens hood and replace it with a new lens assembly, without having to disassemble the lens hood and optical transceiver components. This facilitates lens replacement and keeps the photosensitive unit and lens unit in a sealed state, preventing contamination from the external environment when replacing the lens assembly, greatly reducing the risk of damage to precision components and improving the adaptability of the barcode reader in different application scenarios.

[0052] Figure 1 This paper shows a schematic diagram of the overall structure of a barcode reader according to an embodiment of this application. Figure 2 This diagram shows an disassembled structural diagram of the barcode reader proposed in an embodiment of this application. The barcode reader proposed in this embodiment includes an optical transceiver assembly 110, a lens cover 120, and a lens assembly 130. Figure 1 Since the lens hood 120 is covered by the lens assembly 130 on the optical transceiver assembly 110, therefore, in Figure 1 It is not displayed in the image.

[0053] exist Figure 2 In this structure, the optical transceiver assembly 110 includes a housing 111, within which a photosensitive unit (not shown) and a lens unit (not shown) are disposed. One end of the housing 111 is open, through which the lens unit emits a light signal to the object to be scanned, and through which the photosensitive unit receives the light signal reflected by the object to be scanned. A lens cover 120 is fixedly covered over the opening of the housing 111 to seal the photosensitive unit and the lens unit within the housing 111. A light-transmitting panel is disposed on the lens cover 120, with the light-transmitting panel respectively positioned opposite to the photosensitive unit and the lens unit. The lens assembly 130 includes a lens holder 131 and a lens unit, with the lens holder 131 detachably connected to the lens cover 120, and the lens unit disposed on the lens holder 131 at a position opposite to the photosensitive unit and the lens unit.

[0054] Continue to refer to Figure 2 ,exist Figure 2The optical transceiver assembly 110 includes a housing 111, within which a photosensitive unit and a lens unit are disposed. The lens unit transmits light signals to the object to be scanned. The lens unit includes a light source and an optical lens. The light source can be a common white LED light source, a red LED light source, an infrared light source, etc. Its main function is to provide sufficient light for the QR code, thereby improving the image quality of the QR code captured by the image sensor. The optical lens consists of multiple lens elements used to focus the light, clearly imaging the QR code image onto the image sensor. The performance of the optical lens directly affects the reader's imaging quality, depth of field, and reading distance.

[0055] The photosensitive unit is typically an image sensor, which can be a CCD image sensor or a CMOS image sensor. The image sensor is mainly used to quickly capture the image of the QR code and convert it into an electrical signal. The resolution of the photosensitive unit typically ranges from hundreds of thousands to millions of pixels. The higher the resolution, the richer the imaging details of the QR code, and the higher the accuracy and reliability of the code reading. For example, a 648x488 resolution image sensor can meet the QR code reading needs of general scenarios.

[0056] The barcode reader also includes other units, such as an image processing unit and a communication interface unit. The image processing unit is mainly used to decode the QR code, and the communication interface unit is mainly used to communicate with external devices. It is usually located on a circuit board inside the housing, and will not be described in detail here.

[0057] The aforementioned lens unit, photosensitive unit, image processing unit, and communication interface unit are arranged in a reasonable manner within the housing 111. The housing 111 can be a square structure, a circular structure, or other handheld structure, etc. The housing 111 has an opening at one end, on which a first light-emitting hole 112 and a second light-entry hole 113 are provided. The first light-emitting hole 112 corresponds to the lens unit and is used to transmit light signals through the lens unit; the first light-entry hole 113 corresponds to the photosensitive unit and is used to transmit returned light signals. During operation, the lens unit transmits light signals to the unit to be scanned through a light source, and the photosensitive unit receives the light signals emitted by the object to be scanned through the opening, completing the scanning process.

[0058] Continue to refer to Figure 2The lens hood 120 includes a lens hood bracket 121 and light-transmitting panels (122 and 123). The light-transmitting panels are disposed on the lens hood bracket 121. The structure of the lens hood bracket 121 is adapted to the opening of the housing 111 for fixing to the housing 111, thereby sealing the photosensitive unit and the lens unit within the housing 111. To enable the lens unit and the photosensitive unit to emit and receive light signals, the light-transmitting panels are respectively disposed opposite to the photosensitive unit and the lens unit to allow light signals to pass through. The light-transmitting panels need to be made of a material with high light transmittance, such as glass or PVC.

[0059] The lens assembly 130 includes a lens holder 131 and lens units (135 and 136). The shape of the lens holder 131 is adapted to the shape of the lens cover 120 for detachable connection. The lens units are disposed on the lens holder and can be various types of lenses, such as polarizers and diffuse reflectors. When the lens assembly 130 is assembled with the light transceiver assembly 110 via the lens cover 120, the lens units correspond to the photosensitive unit and the lens unit, and are used to filter the light emitted by the lens unit and the light received by the photosensitive unit.

[0060] Figure 4 The diagram shows the assembly of lens assembly 130 with optical transceiver assembly 110 and lens cover 120. When the lens needs to be replaced, only the lens assembly 130 needs to be removed and replaced with a suitable lens assembly 130. It is not necessary to disassemble the lens cover 120 and the optical transceiver assembly 110, which greatly facilitates lens replacement and enables the barcode reader to adapt to different application scenarios. At the same time, since the lens cover 120 keeps the optical transceiver assembly 110 sealed during the replacement of lens assembly 130, it avoids the influence of the external environment on the optical transceiver assembly 110, prevents the lens unit and photosensitive unit from being contaminated, and improves the service life of the barcode reader.

[0061] Continue to refer to Figure 2 In some embodiments, to make the structure of the barcode reader more compact, a fixing plate 114 can be provided at the opening of the housing 111. The fixing plate 114 is provided with a first light-emitting hole 112 and a first light-entry hole 113; wherein, there can be two first light-emitting holes 112, such as... Figure 2 As shown, the light inlets 112 and 113 can be symmetrically arranged on both sides of the first light inlet 113, and the number and arrangement of the first light outlet 112 correspond to the number and arrangement of the lens units. The fixing plate 114 is used to fix the various functional components inside the housing 111. Of course, in order to reduce the weight of the barcode reader, the fixing plate may not be necessary.

[0062] On the lens hood 120, the light-transmitting panel includes a first light-transmitting panel 122 and a second light-transmitting panel 123. The first light-exiting hole 112 is disposed opposite to the lens unit, and the first light-transmitting panel 122 is disposed opposite to the first light-exiting hole 112. The first light-inlet hole 113 is disposed opposite to the photosensitive unit, and the second light-transmitting panel 123 is disposed opposite to the first light-inlet hole 113. The first light-transmitting panel 122 and the second light-transmitting panel 123 can be made of the same light-transmitting material, or they can be made of different light-transmitting materials depending on the actual application scenario. The first light-transmitting panel 122 and the second light-transmitting panel 123 can be attached to the lens hood bracket 121 by adhesive. Similarly, when there are two first light-inlet holes 112, there are also two first light-transmitting panels 122, corresponding to the number and placement of the first light-inlet holes 112.

[0063] To better secure the lens hood 120 to the optical transceiver assembly 110, such as Figure 2 The lens hood bracket 121 has multiple fixing holes 125 along its edge. Multiple fixing screws 126 pass through these fixing holes 125, and the lens hood 120 is screwed over the opening of the housing 111 of the optical transceiver assembly 110, thereby assembling the lens hood 120 and the optical transceiver assembly 110 together. The lens hood bracket 121 can be made of metal or plastic.

[0064] Preferably, in order to achieve a better sealing effect, a sealing ring (not shown) is provided on the lens cover bracket 121 facing the opening of the housing 111. The sealing ring can achieve a better sealing effect and prevent the lens unit or photosensitive unit inside the housing 111 from being contaminated by the external environment.

[0065] Continue to refer to Figure 2 To better position the lens, the lens unit further includes a support plate 132. The support plate 132 is fixedly mounted to the lens holder 131. The support plate 132 is provided with a second light-emitting hole 133 and a second light-entry hole 134. The second light-emitting hole 133 corresponds to the first light-emitting hole 112, and the second light-entry hole 134 corresponds to the first light-entry hole 113. The lens unit is disposed on the second light-emitting hole 133 and the second light-entry hole 134. Similarly, when there are two first light-entry holes 112, there are also two second light-emitting holes 133, corresponding to the number and position of the first light-entry holes 112.

[0066] The support plate 132 can be made of a different material than the lens holder 131. For example, the lens holder 131 can be made of metal, while the support plate 132 can be made of PVC. PVC material can better fix the lens unit to the support plate 132. Adhesive can be applied to the lens unit to stick it to the corresponding position on the support plate 132.

[0067] In some application scenarios, when the surface of the object to be scanned has strong reflection, the lens unit includes a polarizing filter 135 and an analyzing polarizing filter 136; the polarizing filter 135 is disposed at the second light-emitting hole 133 on the support plate 132; the analyzing polarizing filter 136 is disposed at the second light-entry hole 134 on the support plate 132.

[0068] Polarizers are typically made of special materials that selectively absorb or block light vectors vibrating in one direction while allowing light vectors vibrating in another direction to pass through. For example, common polarizers are made from polyvinyl alcohol (PVA) film treated with iodine or dichroic dyes. When natural light passes through a polarizer, only light vectors aligned with the polarizer's transmission axis can pass through smoothly, while light vectors in other directions are absorbed or blocked, thus converting natural light into polarized light. In situations with strong reflections, polarizers can filter the light, improving the accuracy of QR code scanning under strong light.

[0069] In other scenarios requiring high image uniformity, in this embodiment, the lens unit can be a diffuse reflector; the diffuse reflector is disposed at the second light-emitting aperture 133 on the support plate 132. A diffuse reflector is an optical element capable of diffuse reflection of light. When light shines on the surface of the diffuse reflector, it is reflected uniformly in all directions, unlike specular reflection which reflects only in a specific direction. The surface of a diffuse reflector is typically rough or has a special microstructure, causing light to undergo multiple scattering and reflections when it hits its surface. This surface structure disrupts the conditions for specular reflection, allowing light to be reflected in all directions, thus achieving a diffuse reflection effect.

[0070] To better achieve a detachable connection between the lens assembly 130 and the lens hood 120, such as Figure 2 and Figure 3 As shown in this embodiment, a plurality of snap-fit ​​interfaces are provided on the outer side of one side edge of the lens cover 120; a plurality of snap-fit ​​protrusions are provided on the inner side of one side edge of the lens holder 131; the snap-fit ​​protrusions cooperate with the snap-fit ​​interfaces to fasten the lens assembly 130 onto the lens cover 120.

[0071] like Figure 2 As shown, a first card interface 127 and a second card interface 128 are respectively provided on the outer side of one edge of the lens hood bracket 121. There can be two first card interfaces 127 and two second card interfaces 128, symmetrically arranged on the edge of the lens hood bracket 121. The card interfaces are recessed interfaces. Figure 3 In this design, the inner edge of the lens holder 131 is provided with a first locking protrusion 137 and a second locking protrusion 138. Similarly, there can be two first locking protrusions 137 and two locking protrusions 138, symmetrically arranged on the edge of the lens holder 131, corresponding to the first locking interface 127 and the second locking interface 128. When the lens assembly 130 is fastened to the lens cover 120, pressing the lens assembly 130 engages the first locking protrusion 137 with the first locking interface 127 and the second locking protrusion 138 with the second locking interface 128, thus installing the lens assembly 130. When replacing the lens assembly 130, gently lifting the first locking protrusion 137 and the second locking protrusion 138 separates the first locking protrusion 137 from the first locking interface 127, allowing the lens assembly 130 to be removed.

[0072] Furthermore, in some application scenarios, to prevent contamination of the lens assembly 130, a good seal between the lens assembly 130 and the lens cover 120 is required. In this embodiment, a sealing ring (not shown in the figure) is provided on the edge of the lens holder 131 facing the lens cover 120. When the lens assembly 130 and the lens cover 120 are engaged, the sealing ring is used to seal the lens assembly 130 and the lens cover 120. When the lens holder 131 is engaged on the outside of the lens cover 120, the sealing ring is located on the inner edge of the lens holder 131; when the lens holder 131 is embedded in the inside of the lens cover 120, the sealing ring is located on the outer edge of the lens holder 131. The sealing ring only needs to be located between the lens holder 131 and the lens cover 120. The sealing ring can be made of rubber material, which has good elasticity and provides a better sealing effect.

[0073] In summary, the barcode reader 100 proposed in this application is designed as three independent modules: an optical transceiver assembly 110, a lens hood 120, and a lens assembly 130. The lens hood 120 covers the optical transceiver assembly 110, sealing the photosensitive unit and lens unit to isolate them from the external environment and prevent contamination. Furthermore, the lens is separately mounted on the lens holder 131 to form the lens assembly 130. The lens assembly 130 is detachably connected and fastened together with the lens hood 120 and the optical transceiver assembly 110. The transceiver assembly 110 together form the barcode reader 100. In different application scenarios, when the lens needs to be replaced, it is only necessary to remove the lens assembly 130 from the lens cover 120 and replace it with a new lens assembly 130. It is not necessary to disassemble the lens cover 120 and the optical transceiver assembly 110. This facilitates lens replacement and keeps the photosensitive unit and lens unit in a sealed state, preventing them from being contaminated by the external environment when replacing the lens assembly 130. This greatly reduces the risk of damage to precision components and improves the adaptability of the barcode reader 100 in different application scenarios.

[0074] In other embodiments, this application also proposes a code reading system, which includes a code reader 100 and a server as described in the above embodiments; the code reader 100 is communicatively connected to the server; the server is used to obtain code reading information through the code reader 100 and process the code reading information. The structure of the code reader 100 is the same as that proposed in the above embodiments, and will not be described again here.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A code reader characterized by, include: Optical transceiver assembly, lens hood, and lens assembly; The optical transceiver assembly includes a housing, within which a photosensitive unit and a lens unit are disposed; one end of the housing is open, through which the lens unit emits light signals toward the object to be scanned, and through which the photosensitive unit receives light signals reflected by the object to be scanned; The lens cover includes a lens cover bracket and a light-transmitting panel. The lens cover bracket is fixedly covered over the opening of the housing to seal the photosensitive unit and the lens unit inside the housing. The light-transmitting panel is disposed on the lens cover bracket at a position opposite to the photosensitive unit and the lens unit. The lens assembly includes a lens holder and a lens unit. The lens holder is detachably connected to the lens cover, and the lens unit is disposed on the lens holder at a position opposite to the photosensitive unit and the lens unit.

2. The code reader of claim 1, wherein, The housing has a first light-emitting hole and a first light-inlet hole at its opening; the light-transmitting panel includes a first light-transmitting panel and a second light-transmitting panel. The first light-emitting aperture is disposed opposite to the lens unit, and the first light-transmitting panel is disposed opposite to the first light-emitting aperture; The first light-entry hole is disposed opposite to the photosensitive unit, and the second light-transmitting panel is disposed opposite to the first light-entry hole.

3. The code reader of claim 2, wherein, The lens cover is screwed over the opening of the housing of the optical transceiver assembly.

4. The code reader of claim 2, wherein, The lens unit also includes a support plate; The support plate is fixedly disposed with the lens holder. The support plate is provided with a second light-emitting hole and a second light-entry hole. The second light-emitting hole corresponds to the first light-emitting hole, and the second light-entry hole corresponds to the first light-entry hole. The lens unit is disposed on the second light-exit hole and the second light-inlet hole.

5. The code reader of claim 4, wherein, The lens unit includes a polarizing filter and an analyzing polarizing filter; The polarizing plate is disposed at the second light-emitting hole on the support plate; The polarizer is disposed at the second light-entry hole on the support plate.

6. The code reader of claim 4, wherein, The lens unit includes a diffuse reflective sheet; The diffuse reflector is disposed at the second light-emitting hole on the support plate.

7. The code reader of claim 4, wherein, The support plate is bonded to the lens holder.

8. The code reader of claim 1, wherein, A snap-fit ​​interface is provided on the outer side of one edge of the lens cover; a snap-fit ​​protrusion is provided on the inner side of one edge of the lens holder; The snap-fit ​​protrusion engages with the snap-fit ​​interface to fasten the lens assembly onto the lens cover.

9. The code reader of claim 8, wherein, A sealing ring is provided on one edge of the lens holder facing the lens cover. When the lens assembly is fastened to the lens cover, the sealing ring is used to seal the lens assembly to the lens cover.

10. A code reading system characterized by, Includes the barcode reader and server as described in any one of claims 1-9; The barcode reader is communicatively connected to the server. The server is used to obtain reading information through the code reader and to process the reading information.

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