Wireless transmitting device of bar code scanner

Abstract

The utility model discloses a wireless transmitting device of a bar-code scanner. The wireless transmitting device comprises a bar-code scanner shell, a main circuit board and an antenna main body, the antenna main body is adhered to the upper cover of the shell of the bar code scanner, so that the shape of the antenna main body is not easy to change under the condition of external force, the radio frequency electrical performance of the antenna main body is not easy to change, and the stability of the whole machine is not influenced; the main circuit board is arranged in the bar code scanner housing, and the antenna main body and the main circuit board are connected through a coaxial connecting line. According to the utility model, the antenna is pasted and fixed on the inner surface of the plastic housing, so that the antenna assembly positions of all products are ensured to be the same, and the consistency of wireless performance is effectively ensured.

Description

Technical Field

[0001] The utility model relates to a barcode scanner, in particular to a wireless transmitting device for a barcode scanner. Background Art

[0002] The existing barcode scanner consists of a main board, a wireless transceiver module installed on the main board, and a transceiver antenna, as Figure 1 shown. The main board is responsible for controlling the wireless module and data processing. The antenna is in a copper spiral form and is connected to the wireless transceiver module by welding. The wireless module emits radio frequency signals, which are converted into radio waves by the antenna and transmitted.

[0003] It has the following problems:

[0004] 1. Difficult in production and assembly:

[0005] The radio frequency wireless performance is greatly affected by its own transmission power, receiving sensitivity, and antenna performance. In theory, the area near the antenna should be clear of other objects, especially metals and strong magnets. In the case of this product, since the antenna is relatively close to the surrounding objects, the spatial positions such as the angle and height of the antenna need to be exactly the same as those of the prototype during mass production, with relatively strict requirements, and it is difficult to effectively ensure the consistency of the radio frequency performance of the product during mass production.

[0006] 2. Unsatisfactory communication distance:

[0007] The internal spiral antenna overlaps with the main PCB board in the horizontal direction, and the distance between the top of the antenna and the housing is relatively close, which is seriously affected by the space environment. In the anechoic chamber measurement, the current antenna efficiency is 20%. Summary of the Utility Model

[0008] The technical problem to be solved by the utility model is to provide a wireless transmitting device for a barcode scanner to solve the problems existing in the background art.

[0009] The wireless transmitting device for the barcode scanner of the utility model is realized through the following technical solutions, including: a barcode scanner housing, a main circuit board, and an antenna body;

[0010] The antenna body is adhesively attached to the upper cover of the barcode scanner housing, so that the shape of the antenna body is not easily changed by external forces, thereby changing the radio frequency electrical performance of the antenna body and affecting the stability of the whole machine;

[0011] The main circuit board is arranged in the barcode scanner housing, and the antenna body is connected to the main circuit board through a coaxial connecting wire.

[0012] As a preferred technical solution, the barcode scanner housing includes an upper shell, a handle body, and a tail base;

[0013] The upper shell is disposed above the handle body, and the tail base is mounted below the handle body; the main circuit board is installed between the handle body and the upper cover, and a barcode scanning engine is installed at the front end of the main circuit board;

[0014] A scanning window is provided at the front end of the handle body, and the position of the barcode scanning engine corresponds to that of the scanning window;

[0015] A scanning switch is provided on the handle body, and the scanning switch is connected to the main circuit board. By pressing the scanning switch, the barcode scanning engine is controlled to work.

[0016] As a preferred technical solution, a wireless module is provided on the main circuit board, and a matching circuit is provided at the edge of the PCB board of the wireless module, and a wiring connection position is provided at the matching circuit.

[0017] As a preferred technical solution, the antenna body is an FPC flexible antenna.

[0018] As a preferred technical solution, a sealing rubber ring is provided at the joint of the upper shell and the handle body, and the upper shell and the handle body are sealed by the sealing rubber ring.

[0019] As a preferred technical solution, one end of the coaxial connecting line is locked and fixed on the wiring connection position, and the other end of the coaxial connecting line is connected to the antenna body by welding.

[0020] As a preferred technical solution, the antenna body is adhesively attached to the upper cover of the barcode scanner housing to increase the overall stability of the machine.

[0021] The beneficial effects of the present invention are:

[0022] 1. By adhesively fixing the antenna to the inner surface of the plastic housing, the present invention ensures that the antenna assembly position of each product is the same, thereby effectively ensuring the consistency of wireless performance.

[0023] 2. The flat flexible FPC antenna adopted by the present invention does not overlap with the main PCB board in the horizontal direction, reduces the influence of the space environment on the antenna efficiency, significantly improves the measured antenna efficiency in the anechoic chamber, and the radiation pattern is relatively ideal;

[0024] The FPC antenna is fixed to the inner wall of the housing, and the whole is in close contact with the housing to form a fixed shape. Even under the action of external force, it is not easy to deform, which ensures the stability of the overall radio frequency performance of the machine and reduces the failure rate; reduces the failures caused by antenna deformation or detachment, and improves the reliability and durability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of a product in the prior art;

[0027] Figure 2 It is a schematic overall structural diagram of the present invention;

[0028] Figure 3 It is an exploded view of the present invention;

[0029] Figure 4 It is a partial enlarged view of the present invention;

[0030] Explanation of reference numerals:

[0031] 1. Upper cover;

[0032] 2. Antenna body;

[0033] 3. Main circuit board;

[0034] 4. Wireless module;

[0035] 5. Barcode scanning engine;

[0036] 6. Sealing rubber ring;

[0037] 7. Scanning window;

[0038] 8. Scanning switch;

[0039] 9. Handle body;

[0040] 10. Tail base;

[0041] 11. Edge of the PCB board;

[0042] 12. Matching circuit;

[0043] 13. Wiring connection position. Detailed implementation manners

[0044] All features disclosed in this specification, or all steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any manner.

[0045] As Figures 2 - 4 shown, a wireless transmission device of a barcode scanner according to the present invention includes: a barcode scanner housing, a main circuit board 3, and an antenna body 2;

[0046] The antenna body 2 is adhesively attached to the upper cover 1 of the barcode scanner housing, so that it is not easily deformed under external force, thus changing the radio frequency electrical performance of the antenna body 2 and affecting the stability of the whole machine;

[0047] The main circuit board 3 is arranged inside the barcode scanner housing, and the antenna body 2 is connected to the main circuit board 3 through a coaxial connecting wire.

[0048] Among them, the barcode scanner housing includes an upper shell, a handle body 9 and a tail base 10;

[0049] The upper shell is arranged above the handle body 9, and the tail base 10 is installed below the handle body 9; the main circuit board 3 is installed between the handle body 9 and the upper cover 1, and a barcode scanning engine 5 is installed at the front end of the main circuit board 3;

[0050] A scanning window 7 is arranged at the front end of the handle body 9, and the position of the barcode scanning engine 5 corresponds to that of the scanning window 7;

[0051] A scanning switch 8 is arranged on the handle body 9, and the scanning switch 8 is connected to the main circuit board 3. By pressing the scanning switch 8, the barcode scanning engine 5 is controlled to work.

[0052] Among them, a wireless module 4 is arranged on the main circuit board 3, a matching circuit 12 is arranged at the edge 11 of the PCB board of the wireless module 4, and a wiring connection position 13 is arranged at the matching circuit;

[0053] One end of the coaxial connecting wire is locked and fixed at the wiring connection position, and the other end of the 50-ohm coaxial connecting wire is connected to the antenna body 2 by welding; the radio frequency signal emitted by the wireless module is converted into radio waves and transmitted through the antenna.

[0054] In addition, in this embodiment, the antenna body 2 is an FPC flexible antenna.

[0055] In addition, a sealing rubber ring 6 is arranged at the joint of the upper shell and the handle body 9, and the upper shell and the handle body 9 are sealed by the sealing rubber ring 6.

[0056] As Figure 1 shown, in the existing barcode scanner, since the antenna is relatively close to the surrounding objects, when mass-producing, the spatial positions such as the angle and height of the antenna need to be exactly the same as those of the prototype, and the requirements are relatively strict. It is very difficult to effectively ensure the consistency of the radio frequency performance of the product during mass production. In the present utility model, the antenna is adhesively fixed on the inner surface of the plastic shell, and the antenna assembly positions of each product are the same, which can fully ensure the consistency of the wireless performance.

[0057] In the existing device, a helical antenna is used inside and overlaps with the main PCB board in the horizontal direction. The distance between the top of the antenna and the outer shell is relatively close, and it is severely affected by the space environment. The measured antenna efficiency in the anechoic chamber is 20%. In the present utility model, a flat flexible FPC antenna is used inside and does not overlap with the main PCB board in the horizontal direction. The distance between the top of the antenna and the outer shell is close and the shape is fixed. After careful adjustment, the influence of the space environment can be ignored. The measured antenna efficiency in the anechoic chamber is 40%, and the radiation pattern is relatively ideal.

[0058] For the antenna with a helical structure in the existing device, since only one end is fixed and the other end is suspended, when the product drops or is affected by external forces such as vibration, the shape of the antenna is likely to be changed, thus changing the radio frequency electrical performance of the antenna and affecting the stability of the whole machine. Over time, there is no guarantee that the antenna will not fall off or have permanent deformation, resulting in failures. The FPC antenna of the present utility model is fixed on the inner wall of the outer shell, and the whole plane is in close contact with the outer shell, and the shape forms a fixed state. Therefore, even if it is affected by external forces, it is not easy to deform, thus ensuring the stable radio frequency performance of the whole machine and reducing the failure rate.

[0059] The antenna of the present utility model is performance-adapted for specific products and is not universal with other specifications of outer shells. It is convenient for production management and effectively prevents assembly errors during the production process.

[0060] As described above, the above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any change or replacement that can be thought of without creative work should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

Claims

1. A barcode scanner wireless transmitter, characterized in that: It comprises a barcode scanner housing, a main circuit board (3) and an antenna body (2); The antenna body (2) is arranged on the upper cover (1) of the barcode scanner housing; The main circuit board (3) is arranged in the housing of the barcode scanner, and the antenna body (2) and the main circuit board (3) are connected via a coaxial connecting line; The barcode scanner housing comprises an upper shell, a handle body (9) and a tail base (10); The upper shell is arranged above the handle body (9), and the tail base (10) is installed below the handle body (9); The main circuit board (3) is installed between the handle body (9) and the upper cover (1), and a barcode scanning engine (5) is installed at the front end of the main circuit board (3); A scanning window (7) is provided at the front end of the handle body (9), and the barcode scanning engine (5) corresponds to the position of the scanning window (7); The handle body (9) is provided with a scanning switch (8), and the scanning switch (8) is connected to the main circuit board (3), and the barcode scanning engine (5) is controlled to work by pressing the scanning switch (8); The main circuit board (3) is provided with a wireless module (4), and a matching circuit is provided at the edge of the PCB board of the wireless module (4), and a wiring connection position is provided at the matching circuit; The antenna body (2) is an FPC flexible antenna; A sealing rubber ring (6) is provided at the joint between the upper shell and the handle body (9), and the upper shell and the handle body (9) are sealed by the sealing rubber ring (6); One end of the coaxial connecting wire is locked and fixed on the wiring connection position, and the other end of the coaxial connecting wire is connected to the antenna body (2) by welding; the antenna body is glued and fitted on the upper cover of the barcode scanner housing to increase the stability of the whole machine.

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