LED nixie tube with chip collecting function

Abstract

The utility model discloses an LED nixie tube with a chip collecting function, which comprises a plastic shell and a PCB (printed circuit board), a plurality of screw holes are arranged on the back of the plastic shell, the plastic shell and the PCB are assembled and connected through screws and the screw holes, the heads of the screw holes expand outwards in the radial direction to form conical parts, chip collecting grooves are formed between the conical parts and the screws, and the chip collecting grooves are communicated with the plastic shell. The chip collecting groove is used for collecting waste chips generated in the screw rotating process. According to the LED nixie tube, the structure of the screw hole is improved, optical crosstalk or light leakage caused by sweeps is avoided, the display effect of the LED nixie tube is guaranteed, and the product yield is improved.

Description

Technical Field

[0001] The utility model belongs to the field of LED displays, relates to LED digital tubes, and particularly relates to an LED digital tube with a chip collecting function. Background Technique

[0002] The core part of the LED digital tube includes a plastic shell and a PCB (printed circuit board). The PCB is assembled on the back of the plastic shell, and the windows on the plastic shell are lit by the lamp cores on the PCB to achieve the display function. The assembly methods of the plastic shell and the PCB include potting, thermal riveting, screwing, etc. Among them, the method of screwing can reduce the number of thermal riveting posts, and the pressing force is better than that of the thermal riveting posts, making the product not prone to light crosstalk, so it has certain advantages.

[0003] However, in the actual assembly operation process, waste chips will be generated during the process of driving the screws into the screw holes. These waste chips will remain on the joint surface between the PCB and the plastic shell. The problem caused by this is that there will be gaps between the plastic shell and the PCB due to these waste chips, resulting in light crosstalk or light leakage in the LED digital tube, affecting the display effect of the LED digital tube and reducing the product yield. Summary of the Invention

[0004] Object of the Invention: In order to overcome the deficiencies existing in the prior art, an LED digital tube with a chip collecting function is provided. By improving the structure of the screw holes, the occurrence of light crosstalk or light leakage caused by waste chips is avoided, the display effect of the LED digital tube is guaranteed, and the product yield is improved.

[0005] Technical Solution: To achieve the above object, the utility model provides an LED digital tube with a chip collecting function, which includes a plastic shell and a PCB. A plurality of screw holes are provided on the back surface of the plastic shell. The plastic shell and the PCB are assembled and connected through screws and screw holes. The head of the screw hole radially expands outward to form a tapered portion. A chip collecting groove is formed between the tapered portion and the screw. The chip collecting groove is used to collect the waste chips generated during the rotation of the screw.

[0006] Further, the width of the screw hole is 1.3 mm, the maximum width of the tapered portion is 1.9 mm, and the depth of the tapered portion is 0.5 mm.

[0007] Further, the length of the screw is less than the depth of the screw hole.

[0008] Further, a sealing ring is provided on the outer wall of the screw. The sealing ring is in close fit with the tapered portion, ensuring the sealing performance of the chip collecting groove and preventing waste chips from entering the screw hole.

[0009] Further, the distance between the sealing ring and the bottom of the screw is equal to the distance between the bottom end of the tapered portion and the bottom of the screw hole, so that the sealing ring is exactly in the required position after the screw is screwed in place.

[0010] Further, the screw and the sealing ring are integrally formed.

[0011] Beneficial effects: Compared with the prior art, by improving the structure of the screw hole, the chip collection groove can collect the waste chips generated during the screwing process of the screw, avoiding the appearance of waste chips on the connection surface between the PCB and the plastic shell, preventing the occurrence of light leakage or light stringing caused by the waste chips, ensuring the display effect of the LED digital tube, and improving the product yield. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present invention;

[0013] Figure 2 is a schematic diagram of the connection state between the screw and the screw hole in the present invention;

[0014] Figure 3 is a front view schematic diagram of the plastic shell in this embodiment;

[0015] Figure 4 is a rear view schematic diagram of the plastic shell in this embodiment. Detailed Embodiment

[0016] The present invention will be further clarified below with reference to the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent modifications of the present invention by those skilled in the art fall within the scope defined by the appended claims of this application.

[0017] As Figures 1 to 4 shown, the present invention provides an LED digital tube with a chip collection function, including a plastic shell 2 and a PCB 1. There are 8 screw holes 3 provided on the back surface of the plastic shell 2. The plastic shell 2 and the PCB 1 are assembled and connected through screws 4 and screw holes 3. The head of the screw hole 3 radially expands outward to form a tapered portion 7. A chip collection groove 6 is formed between the tapered portion 7 and the screw 4. The width of the screw hole 3 is 1.3 mm, the maximum width of the tapered portion 7 is 1.9 mm, the depth of the tapered portion 7 is 0.5 mm, the length of the screw 4 is less than the depth of the screw hole 3. A sealing ring 5 is provided on the outer wall of the screw 4. The sealing ring 5 can be closely attached to the tapered portion 7. The distance between the sealing ring 5 and the bottom of the screw 4 is equal to the distance between the bottom end of the tapered portion 7 and the bottom of the screw hole 3. The screw 4 and the sealing ring 5 are integrally formed.

[0018] In this embodiment, the plastic shell 2 and the PCB 1 are assembled and connected by successively screwing 8 screws 4 into 8 screw holes 3. During the process of screwing the screws 4, the generated waste chips will fall into the chip collection groove 6. After the screwing is completed, the sealing ring 5 fits tightly on the conical part 7, ensuring the sealing performance and preventing the waste chips from entering the screw holes 3.

[0019] As can be seen from the above process, the LED digital tube provided by the present utility model improves the screw hole structure, and the chip collection groove 6 can collect the waste chips generated during the process of screwing the screws 4, avoiding the appearance of waste chips on the connection surface between the PCB 1 and the plastic shell 2, preventing the occurrence of light crosstalk or light leakage caused by waste chips, ensuring the display effect of the LED digital tube, and improving the product yield.

Claims

1. An LED digital tube with a chip collection function, comprising a plastic shell and a PCB, wherein a plurality of screw holes are arranged on the back of the plastic shell, and the plastic shell and the PCB are assembled and connected through screws and screw holes, characterized in that: The head of the screw hole expands radially outward to form a tapered portion, and a chip collecting groove is formed between the tapered portion and the screw. The chip collecting groove is used to collect waste chips generated during the rotation of the screw.

2. The LED digital tube with chip collection function according to claim 1, characterized in that: The width of the screw hole is 1.3 mm, the maximum width of the tapered portion is 1.9 mm, and the depth of the tapered portion is 0.5 mm.

3. The LED digital tube with chip collection function according to claim 1, characterized in that: The length of the screw is smaller than the depth of the screw hole.

4. The LED digital tube with chip collection function according to claim 1, characterized in that: A sealing ring is arranged on the outer wall of the screw, and the sealing ring is tightly fitted with the tapered portion.

5. The LED digital tube with chip collection function according to claim 4, characterized in that: The distance between the sealing ring and the bottom of the screw is equal to the distance between the bottom end of the conical portion and the bottom of the screw hole.

6. The LED digital tube with chip collection function according to claim 4, characterized in that: The screw and the sealing ring are integrally formed.

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