CN217640568U - Fixing structure is paid to lock of indoor LED display screen - Google Patents

Abstract

The utility model relates to a fixed knot constructs is paid to lock of indoor LED display screen, including PCB board and drain pan, a plurality of blind holes have been seted up at the back of PCB board, a plurality of screw shoulder holes with the blind hole one-to-one have been seted up at the back of drain pan, wear to be equipped with in the screw shoulder hole with blind hole matched with self tapping screw, be provided with a plurality of pads that are located the blind hole next door on the back of PCB board, the metal post is equipped with in the subsides on the pad, the metal post drain pan of contradicting, the screw hole has been seted up in the one end of PCB board dorsad to the metal post, set up a plurality ofly on the drain pan and detain the hole with the pad one-to, the metal post stretches into and detains in the one end of hole towards the PCB board, the one end of PCB board dorsad of metal post is provided with the pad. The utility model discloses the metal column on disconnected self tapping screw position next door is paid with the mechanical screw lock to the convenience for drain pan and PCB board also can be fixed reliably in self tapping screw fracture department, guarantee product overall quality, do not scrap the PCB board because of disconnected self tapping screw, reduce the cost of scrapping.

Description

Fixing structure is paid to lock of indoor LED display screen

Technical Field

The utility model belongs to the technical field of the LED display screen, concretely relates to fixed knot constructs is paid to lock of indoor LED display screen.

Background

In the existing indoor Q1.5 to Q2.5 LED high-density display screen module product, the bottom case 2 and the PCB 1 are fixed by locking self-tapping screws 3 (such as screws P0.6/P0.8/P1.0) from the back of the bottom case 2 to the back of the PCB 1, and LED lamp beads 4 are disposed on the front of the PCB 1, as shown in fig. 1 to 2. When the PCB is produced in batch, uncontrollable factors can occur in the process of locking the self-tapping screws 3, so that the self-tapping screws 3 are broken and cannot be taken out of the screw holes of the PCB 1, the PCB 1 is scrapped, and the scrapping cost is high.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of prior art, the utility model aims to provide a fixed knot constructs is paid to lock of indoor LED display screen, conveniently pays the metal column on this cracked self tapping screw position next door with the mechanical screw lock when self tapping screw fracture and can't take out for drain pan and PCB board also can be fixed reliably in this self tapping screw fracture department, avoid self tapping screw fracture to lead to scrapping of PCB board, reduce the cost of scrapping.

In order to realize the purpose, the utility model adopts the following technical scheme: the utility model provides a fixed knot constructs is paid to lock of indoor LED display screen, includes PCB board and drain pan, a plurality of blind holes have been seted up at the back of PCB board, a plurality of screw shoulder holes with the blind hole one-to-one have been seted up at the back of drain pan, wear to be equipped with in the screw shoulder hole with blind hole matched with self tapping screw, be provided with a plurality of pads that are located the blind hole next door on the back of PCB board, the pad facing is equipped with the metal post, metal post conflict drain pan, the threaded hole has been seted up in the one end of metal post dorsad PCB board, set up a plurality of knot holes with the pad one-to-one on the drain pan, the metal post stretches into in the one end of detaining the hole towards the PCB board, the one end of metal post dorsad PCB board is provided with the pad membrane.

Preferably, the metal column is a contact copper column, a salient point is arranged at one end of the metal column facing the PCB, and a through hole for the salient point to extend into is formed in the PCB.

Preferably, one end of the fastening hole facing the PCB board is a guide hole, and the guide hole has a conical guide surface with a larger outer part and a smaller inner part.

Preferably, the inner wall of one end of the buckling hole facing the PCB board is provided with a plurality of convex ribs which extend towards the center and are symmetrically distributed, and the convex ribs are abutted to the outer wall of the metal column.

Preferably, the outer periphery of the hole at one end facing the PCB board is provided with an annular boss, and the outer periphery of the metal column is provided with an annular flange in interference fit with the annular boss.

Preferably, the fastening hole is formed on the inner frame of the bottom case.

Preferably, the fastening hole is an I-shaped stepped hole.

Preferably, the metal posts are fitted with mechanical screws.

Compared with the prior art, the utility model discloses following beneficial effect has: a new bottom shell is designed, a plurality of buckling holes are additionally arranged beside the screw stepped holes on the basis of the existing bottom shell, and a plurality of metal columns corresponding to the buckling holes are attached to the back of the PCB; when the self-tapping screws are broken in production and cannot be taken out, the metal columns beside the broken self-tapping screws can be locked by using mechanical screws, so that the bottom shell and the PCB can be reliably and fixedly connected at the broken parts of the self-tapping screws, the overall quality of the LED high-density display screen module products from Q1.5 to Q2.5 is guaranteed, the PCB is not scrapped due to the broken self-tapping screws, and the cost is reduced.

Drawings

Fig. 1 is a rear structure diagram of a conventional LED display screen.

Fig. 2 is a sectional view of a conventional LED display screen.

Fig. 3 is a rear structure view of the PCB board.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is a back structure view of the LED display panel when the tapping screw is broken.

Fig. 6 is an enlarged view of fig. 5 at B.

Fig. 7 is a cross-sectional view at C-C in fig. 6.

Fig. 8 is a cross-sectional view of a metal column according to a first embodiment of the present invention.

Fig. 9 is a partial cross-sectional view of an LED display panel in a second embodiment of the present invention, when the tapping screw is not broken.

The mark in the figure is: 1. a PCB board; 2. a bottom case; 3. self-tapping screws; 4. LED lamp beads; 5. blind holes; 6. a screw stepped hole; 7. self-tapping screws; 8. a bonding pad; 9. a metal post; 10. a threaded hole; 11. buckling holes; 12. pasting a film; 13. salient points; 14. a through hole; 15. a guide hole; 16. a conical guide surface; 17. a rib is protruded; 18. an annular boss; 19. an annular flange; 20. an inner frame; 21. mechanical screw.

Detailed Description

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The first embodiment is as follows: as shown in fig. 3 to 8, a locking and fixing structure of an indoor LED display screen includes a PCB 1 and a bottom case 2, the back of the PCB 1 is provided with a plurality of blind holes 5, the back of the bottom case 2 is provided with a plurality of screw stepped holes 6 corresponding to the blind holes 5 one by one, self-tapping screws 7 matched with the blind holes 5 penetrate through the screw stepped holes 6, the back of the PCB 1 is provided with a plurality of (e.g., eighteen) bonding pads 8 located beside the blind holes 5, metal columns 9 are attached to the bonding pads 8, the metal columns 9 abut against the bottom case 2, one ends of the metal columns 9, which face away from the PCB 1, are provided with threaded holes 10, the bottom case 2 is provided with a plurality of (e.g., eighteen) buckling holes 11 corresponding to the bonding pads 8 one by one, the metal columns 9 extend into one ends of the buckling holes 11, which face toward the PCB 1, one ends of the metal columns 9, which face away from the PCB 1, are provided with adhesive films 12, and impurities can be prevented from entering the threaded holes 10 by the adhesive films 12.

In this embodiment, the metal pillar 9 is preferably but not limited to a contact copper pillar, a bump 13 is disposed at one end of the metal pillar 9 facing the PCB 1, and a through hole 14 for the bump 13 to extend into is formed in the PCB 1, so that the metal pillar 9 can be quickly positioned by matching the bump 13 with the through hole 14, and a contact exposed on the front surface of the PCB 1 can be formed by welding on the bump 13 in the through hole 14.

In this embodiment, in order to support the metal column 9 and limit the position of the metal column 9, the fastening hole 11 is provided with an annular boss 18 towards the periphery of the orifice at one end of the PCB board 1, the periphery of the metal column 9 is provided with an annular flange 19 in interference fit with the annular boss 18, and the metal column 9 is supported and limited by the cooperation of the annular flange 19 and the annular boss 18.

In the present embodiment, in order to improve the structural strength of the fastening hole 11, the fastening hole 11 is preferably, but not limited to, disposed on the inner frame 20 of the bottom case 2, and the fastening hole 11 is preferably, but not limited to, an i-shaped step hole. Wherein, the metal column 9 is matched with a mechanical screw 21 for use when the self-tapping screw 7 is broken.

The working principle of the embodiment is as follows: in the production process, when the self-tapping screw 7 is broken and the broken self-tapping screw 7 cannot be taken out of the blind hole 5 of the PCB 1, the metal column 9 beside the broken self-tapping screw 7 is selected, the adhesive film 12 on the metal column 9 is taken away, and the mechanical screw 21 (such as an M3 mechanical screw) is locked, so that the bottom shell 2 and the PCB 1 can be reliably and fixedly connected at the broken part of the self-tapping screw 7 through the matching of the mechanical screw 21 and the metal column 9, the scrapping of the PCB 1 is avoided, and the cost is saved.

Example two: as shown in fig. 9, a locking and fixing structure of an indoor LED display screen is different from the first embodiment in that: in order to improve the efficiency of the alignment and the insertion of the metal column 9 and the buckle hole 11, the one end of the buckle hole 11 facing the PCB board 1 is provided with a guide hole 15, the guide hole 15 is provided with a conical guide surface 16 with a large outer part and a small inner part, and the contact copper column is guided to be rapidly and accurately inserted into the buckle hole 11 through the conical guide surface 16, so that the installation is convenient and the efficiency is high.

In this embodiment, in order to improve the firm in connection nature of metal column 9 and drain pan 2, detain hole 11 and have a plurality of protruding muscle 17 that extend and the symmetric distribution to the center towards the one end inner wall of PCB board 1, protruding muscle 17 contradicts at the outer wall of metal column 9 for metal column 9 and drain pan 2 firm connection, the mechanical screw 21 of being convenient for simultaneously and metal column 9 lock pay fixedly.

The above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention in any way, and any person skilled in the art should not depart from the technical scope of the present invention, and all simple modifications, equivalent variations and modifications made to the above embodiments by the technical spirit of the present invention should fall within the scope of the present invention.

Claims (8)

1. The utility model provides a fixed knot constructs is paid to lock of indoor LED display screen, includes PCB board and drain pan, a plurality of blind holes have been seted up at the back of PCB board, a plurality of screw shoulder holes with the blind hole one-to-one have been seted up to the back of drain pan, wear to be equipped with in the screw shoulder hole with blind hole matched with self tapping screw, its characterized in that: the PCB is characterized in that a plurality of bonding pads located beside the blind holes are arranged on the back face of the PCB, metal columns are mounted on the bonding pads in an attached mode and abut against the bottom shell, threaded holes are formed in one ends, back to the PCB, of the metal columns, a plurality of buckling holes in one-to-one correspondence with the bonding pads are formed in the bottom shell, the metal columns stretch into the buckling holes and face towards one ends of the PCB, and a film is arranged at one ends, back to the PCB, of the metal columns.

2. The locking and fixing structure of the indoor LED display screen of claim 1, wherein: the metal column is the contact copper post, the one end of metal column orientation PCB board is provided with the bump, set up the through-hole that supplies the bump to stretch into on the PCB board.

3. The locking and fixing structure of the indoor LED display screen according to claim 1, characterized in that: the one end of detaining the hole and towards the PCB board is the guiding hole, the guiding hole has the big conical guiding surface in inside.

4. The locking and fixing structure of the indoor LED display screen according to claim 1, characterized in that: the one end inner wall of detaining the hole towards the PCB board has a plurality of protruding muscle that extend and the symmetric distribution to the center, protruding muscle is contradicted at the outer wall of metal column.

5. The locking and fixing structure of the indoor LED display screen according to claim 1, characterized in that: detain the hole and be provided with annular boss towards the one end drill way periphery of PCB board, the periphery of metal column has the annular flange of contradicting the complex with annular boss.

6. The locking and fixing structure of the indoor LED display screen of claim 1, wherein: the buckling holes are formed in the inner frame of the bottom shell.

7. The locking and fixing structure of the indoor LED display screen of claim 1, wherein: the buckling hole is an I-shaped step hole.

8. The locking and fixing structure of the indoor LED display screen of claim 1, wherein: the metal column is matched with a mechanical screw.

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