Small-size bar code reading module

Abstract

The utility model relates to a small-size bar code reading module. Comprising a shell and a mainboard assembly. The front shell is provided with a limiting strip, the rear shell is provided with a corresponding limiting groove, and a complete shell is formed through ultrasonic welding assembly; the first main board, the second main board and the third main board are electrically connected through a wire rod, and gaps between the main boards or between the main board and the shell are small. The shell is assembled through ultrasonic welding, high-frequency vibration is generated, local high temperature is caused, the connecting position of the shell is melted and fused under pressure, and the welding strength is close to the strength of raw materials. Due to the fact that the materials are fused into a whole, the absolute sealing effect can be achieved through protection. The size of the main board in the stacking direction is extremely reduced, and the extremely small height can adapt to more scenes. And compared with other multi-mainboard equipment, heat can be transmitted and dissipated through the structure in a small-size inter-board gap, and the heat conduction efficiency is improved by 30% under the same working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bar code reading device, concretely relates to a small size bar code reading module. BACKGROUND

[0002] At present, the mainboard assembly of two-dimensional bar code reading equipment integrates the lens module, laser tube assembly, light supplement lamp and connector on the same printed circuit board, which leads to the dispersion of component layout, the complexity of assembly process and the influence on production efficiency; the common-plate work of each heating element leads to poor heat dissipation and easy damage of components; the fixing mode of screw locking or dispensing makes maintenance inconvenient and costs high; meanwhile, the existing design also has problems of large overall size and complex structure, which needs to be optimized from aspects of structure layout, heat dissipation scheme and fixing mode to improve assembly efficiency, product reliability and maintainability. UTILITARY MODEL

[0003] Therefore, the utility model solves the problems of large heat generation of the circuit board, poor heat dissipation effect, high maintenance cost of each component and large size of the bar code reader in the prior art, provides a small size bar code reading module, meets the small size requirement and has the advantages of high structural strength, sealing level and easy replacement of components.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0005] A small size bar code reading module, comprising:

[0006] A shell, which is internally provided with a limiting part of each device and is provided with a window at the front; comprising: a front shell and a rear shell, the front shell is provided with a limiting strip, the rear shell is provided with a corresponding limiting groove, and the front shell and the rear shell are assembled through ultrasonic welding;

[0007] A mainboard assembly, comprising: a first mainboard, a second mainboard and a third mainboard, which are electrically connected through wires; the first mainboard is provided with an illumination assembly; the second mainboard is provided with an image sensor, and the image sensor is located behind an optical lens; and the third mainboard is provided with a processor and a memory.

[0008] Further, the gap between the first mainboard and the second mainboard is 0.8mm-1.0mm.

[0009] Further, the gap between the second mainboard and the third mainboard is 0.2mm-0.4mm.

[0010] Further, the gap between the third mainboard and the rear shell is 0.3mm-0.5mm.

[0011] Further, the shell side is provided with an opening, and the data line is fixed at the shell opening through interference fit, and the data line is electrically connected with the third mainboard.

[0012] Further, the screen is provided with a back adhesive layer arranged at the front of the shell, and the lens foam is arranged between the optical lens and the shell.

[0013] Further, the limiting part is provided with a positioning column, and the first mainboard and the second mainboard are provided with corresponding positioning grooves and are locked in the shell through screws.

[0014] Further, the other side of the shell away from the data line is provided with an opening, and a light-transmitting indicating piece is attached outside the opening.

[0015] Further, the wire is one and is connected with the first mainboard, the second mainboard and the third mainboard.

[0016] Further, the total length of the module is 3.2cm-4.1cm, the width is 2.0cm-2.2cm, and the height is 1.79cm-1.99cm.

[0017] The present application has the following beneficial effects:

[0018] 1. The small-size bar code reading module, the front shell of the bar code reading module is provided with a limiting strip, the rear shell is provided with a corresponding limiting groove structure, and the front shell and the rear shell are assembled through ultrasonic welding. The shell material uses thermoplastic plastic, the ultrasonic wave acts on the connecting part of the shell, high-frequency vibration is generated on the contact surface, local high temperature is caused, the thermoplastic plastic is melted and fused under pressure, and the welding strength is close to the strength of the raw material. Since the material is fused into one, the protection can achieve an absolutely sealed effect. Compared with the screw locking mode, the ultrasonic welding saves space and cost, and there is no gap between the structure cooperation, and has an absolute advantage in waterproof and anti-static.

[0019] 2. The small-size bar code reading module, the first mainboard, the second mainboard and the third mainboard are arranged in the front end, the middle end and the rear end of the shell in the front-rear order, and the gap between the rear shell is arranged, the stacking direction size of the mainboard is extremely small, compared with other bar code reading modules on the market, the extremely small height can adapt to more scenes.

[0020] 3. The small-size bar code reading module, the front shell and the rear shell are assembled through ultrasonic welding, the data line is fixed on the shell through interference fit, and the screen is provided with a back adhesive layer and is pressed into the front of the shell. The multiple settings can all achieve the effect of sealing and waterproofing.

[0021] 4. The small size bar code reading module, the lens bubble cotton is arranged between the optical lens and the shell, plays a supporting role on the optical lens, and can prevent the lens assembly from falling off due to falling, vibration and the like.

[0022] 5. The small size bar code reading module, a plurality of mainboards are connected by the same wire rod to complete stacking, maintenance only needs to replace the corresponding module mainboard, and cost is saved. The small size bar code reading module solves the shortcomings of the traditional plurality of modules integrated in the same mainboard assembly. Compared with other multi-mainboard devices, heat can be easily transferred and dissipated through the structure under the gap between the small size boards, and the heat conduction efficiency is improved by 30% under the same working condition. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The utility model discloses a structure schematic diagram.

[0024] Figure 2 The utility model discloses a structure exploded schematic diagram.

[0025] Figure 3 The utility model discloses a section schematic diagram.

[0026] Figure 4 The utility model discloses a shell and limit strip amplification schematic diagram.

[0027] The figure mark is: 100 - shell;110 - front shell;120 - rear shell;111 - limit strip;210 - first mainboard;220 - second mainboard;230 - third mainboard;300 - wire rod;211 - illumination assembly;221 - optical lens;222 - lens bubble cotton;400 - data line;500 - screen;600 - screw;700 - light transmission indicating piece;A - limit strip amplification schematic diagram. DETAILED DESCRIPTION

[0028] The utility model will be detailed below in combination with the drawings and specific embodiment.

[0029] As Figures 1-4 shown, a small size bar code reading module comprises:

[0030] The shell 100 is internally provided with a limiting part of each device, supports the placement or light passing of each device, and is provided with a window at the front part and is made of plastic material; the shell 100 comprises: a front shell 110 and a rear shell 120, the front shell 110 is provided with a limiting strip 111, the rear shell 120 is provided with a corresponding limiting groove, the thermoplastic plastic contact surface of the limiting strip 111 of the front shell 110 and the limiting groove of the rear shell 120 is contacted by ultrasonic waves, assembled by ultrasonic welding, high-frequency vibration is generated, local high temperature is caused, the plastic is melted and fused under pressure; the strength of ultrasonic welding is close to the strength of raw materials. Because the materials are melted into one body, the protection can achieve an absolute sealing effect. Compared with the way of locking screws, ultrasonic welding saves space and cost, and there is no gap between the structure cooperation, which has absolute advantages in waterproof and anti-static.

[0031] The mainboard assembly comprises: a first mainboard 210, a second mainboard 220 and a third mainboard 230, which are electrically connected by wires 300; the first mainboard 210 is provided with an illumination assembly 211; the second mainboard 220 is provided with an image sensor, and the image sensor is located behind an optical lens 221; the third mainboard 230 is provided with a processor and a memory. The illumination assembly 211 is provided with two, which is beneficial to uniform light, and comprises an illumination lens and an illumination lamp, and the illumination lens is fixed above the illumination lamp.

[0032] The gap between the first mainboard 210 and the second mainboard 220 is 0.8mm-1.0mm.

[0033] The gap between the second mainboard 220 and the third mainboard 230 is 0.2mm-0.4mm.

[0034] The gap between the third mainboard 230 and the rear shell 120 is 0.3mm-0.5mm.

[0035] The side edge of the shell 100 is provided with an opening, a data line 400 is fixed at the opening of the shell 100 by interference fit, and the data line 400 is electrically connected with the third mainboard 230. Interference fit is a kind of fit in mechanical assembly, which means that the size of the shaft is slightly larger than the size of the hole, and external force is needed for forced assembly, such as pressing in, heating shaft or cooling hole. After assembly, the two are tightly combined due to elastic deformation, cannot freely move relative to each other, and achieve a sealing effect.

[0036] The screen 500 is provided with an adhesive layer and is arranged at the front part of the shell 100; a lens foam 222 is arranged between the optical lens 221 and the shell 100.

[0037] The limiting part is provided with a positioning column, and the first mainboard 210 and the second mainboard 220 are provided with corresponding positioning grooves and are locked in the shell 100 by screws 600.

[0038] The other side of the shell 100 away from the data line 400, provided with an opening, the opening outside is attached with a light transmission indicating piece 700.

[0039] The wire 300 used by the module is one, and the first mainboard 210, the second mainboard 220 and the third mainboard 230 are connected by the same wire 300 to complete stacking, and maintenance only needs to replace the corresponding mainboard, saving cost. The shortcomings of the traditional integration of multiple modules on the same mainboard assembly are solved.

[0040] The overall length of the module is 3.2cm-4.1cm, the width is 2.0cm-2.2cm, and the height is 1.79cm-1.99cm. Compared with other multi-mainboard devices, the present application not only has small size plate gap and small size of the overall module, but also can easily transfer and dissipate heat through the structure, and the heat conduction efficiency is improved by 30% under the same working condition.

[0041] The above examples are only for illustration and not limitation of the present application, so equivalent changes or modifications made according to the method described in the scope of the present application are included in the scope of the present application.

Claims

1. A small size bar code reading module, characterized in that, It includes: The shell (100) is internally provided with a limiting part of each device, and a window is provided at the front; it includes: a front shell (110) and a rear shell (120), the front shell (110) is provided with a limiting strip (111), the rear shell (120) is provided with a corresponding limiting groove, and the front shell (110) and the rear shell (120) are assembled by ultrasonic welding; The mainboard assembly includes: a first mainboard (210), a second mainboard (220) and a third mainboard (230) which are electrically connected by a wire (300); the first mainboard (210) is provided with an illumination assembly (211); the second mainboard (220) is provided with an image sensor, and the image sensor is located behind an optical lens (221); the third mainboard (230) is provided with a processor and a memory.

2. The small size bar code reading module according to claim 1, wherein: The gap between the first mainboard (210) and the second mainboard (220) is 0.8mm-1.0mm.

3. The small size bar code reading module according to claim 1, wherein: The gap between the second mainboard (220) and the third mainboard (230) is 0.2mm-0.4mm.

4. The small size bar code reading module according to claim 1, wherein: The gap between the third mainboard (230) and the rear shell (120) is 0.3mm-0.5mm.

5. The small size bar code reading module according to claim 1, wherein: The shell (100) is provided with an opening at the side, and the data line (400) is fixed at the opening of the shell (100) by interference fit, and the data line (400) is electrically connected with the third mainboard (230).

6. The small size bar code reading module according to claim 1, wherein: The screen (500) is provided with an adhesive layer and is arranged at the front of the shell (100); the lens foam (222) is arranged between the optical lens (221) and the shell (100).

7. The small size bar code reading module according to claim 1, wherein: The limiting part is provided with a positioning column, and the first mainboard (210) and the second mainboard (220) are provided with corresponding positioning grooves and are locked in the shell (100) by screws (600).

8. The small size bar code reading module according to claim 1, wherein: The other side of the shell (100) away from the data line (400) is provided with an opening, and a light-transmitting indicating piece (700) is attached outside the opening.

9. The small size bar code reading module according to claim 1, wherein: The wire (300) is one, connecting the first mainboard (210), the second mainboard (220) and the third mainboard (230).

10. A small size bar code reading module according to any one of claims 1-9, characterized in that: The overall length of the module is 3.2cm-4.1cm, the width is 2.0cm-2.2cm, and the height is 1.79cm-1.99cm.

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