Small-spacing LED display screen

Abstract

The utility model discloses a small-spacing LED display screen, and belongs to the technical field of display screens. The small-spacing LED display screen comprises a bottom shell, two cylinders are arranged on the front face of the bottom shell, each cylinder is provided with a first through hole in a penetrating mode, and an elastic blocking piece is arranged on the hole wall of each first through hole; the mounting lock module is arranged on the back surface of the bottom shell, a cam is arranged on a rotating shaft lock cylinder of the mounting lock module, and the cam is opposite to at least one first through hole; the PCB lamp panel is connected with the front face of the bottom shell, the PCB lamp panel is provided with two front maintenance holes corresponding to the two elastic plugging pieces, and the elastic plugging pieces are used for closing the front maintenance holes. According to the small-spacing LED display screen, the small-spacing LED display screen can be quickly assembled and disassembled without a motor, the overall weight and the manufacturing cost of the small-spacing LED display screen are reduced, and pouring sealant is prevented from entering the display screen.

Description

TECHNICAL FIELD

[0001] The utility model relates to display screen technical field especially relates to a small -pitch LED display screen. BACKGROUND

[0002] The working principle of LED display screen is mainly based on the electroluminescence principle of light emitting diode. When the light emitting diode is in the forward working state (that is, the positive voltage is added to both ends), the current flows from the anode to the cathode of LED, and the semiconductor crystal will emit different color light from ultraviolet to infrared, and the intensity of light is related to the current. By controlling the on-off of these light emitting diodes, various images and texts can be formed. LED display screen is widely used in various fields, such as stations, wharfs, airports, shopping malls, hospitals, hotels, banks, securities markets and other public places for information display, as well as advertising screens, stage background screens, etc.

[0003] The LED display screen comprises a bottom shell, a PCB lamp plate and a mounting lock module, the mounting lock module is arranged on the back of the bottom shell, and the PCB lamp plate is arranged on the front of the bottom shell. On the one hand, the prior art adopts a motor to drive the rotation of the rotating shaft lock core in the mounting lock module, thereby achieving the quick assembly and disassembly of the small-pitch LED display screen and the mounting frame. However, due to the addition of the motor in the small-pitch LED display screen, the overall weight and manufacturing cost of the small-pitch LED display screen are increased, which is not conducive to the mass production of the small-pitch LED display screen. On the other hand, since the LED light emitting part is welded to the front of the PCB lamp plate through the pin, a layer of potting glue needs to be filled on the front of the PCB lamp plate to avoid the exposure of the pin. However, the potting glue is easy to penetrate into the interior of the LED display screen from the front maintenance hole of the PCB lamp plate, which affects the operation of the mounting lock module.

[0004] Therefore, there is an urgent need to provide a small-pitch LED display screen to solve the above problems. Utility model content

[0005] The utility model aims at providing a small-pitch LED display screen, which can realize the quick assembly and disassembly of the small-pitch LED display screen without using a motor, reduce the overall weight and manufacturing cost of the small-pitch LED display screen, and avoid the entry of potting glue into the interior of the display screen.

[0006] To achieve the above-mentioned purpose, the following technical scheme is provided:

[0007] The small-pitch LED display screen comprises:

[0008] The bottom shell is provided with two cylinders on the front, and each cylinder is provided with a first through hole, and the hole wall of the first through hole is provided with an elastic plugging piece;

[0009] An installation lock module is arranged on the back of the bottom shell, and a cam is arranged on the rotating shaft lock core of the installation lock module, which is opposite to at least one first through hole;

[0010] A PCB lamp plate is connected to the front of the bottom shell, and two front maintenance holes are arranged on the PCB lamp plate corresponding to two elastic sealing members, which are used to close the front maintenance holes.

[0011] As an optional solution of the small-pitch LED display screen, a limiting groove is arranged on one end of the cylinder close to the PCB lamp plate, and the limiting groove is located at the periphery of the first through hole. The small-pitch LED display screen further comprises:

[0012] A sealing member is arranged in the limiting groove and clamped between the PCB lamp plate and the bottom shell.

[0013] As an optional solution of the small-pitch LED display screen, at least three first connecting columns are arranged on the front of the bottom shell, and first connecting holes are arranged on the first connecting columns. The cylinder is located between two adjacent first connecting columns. At least three second connecting holes are arranged on the PCB lamp plate, and the front maintenance holes are located between two adjacent second connecting holes. The small-pitch LED display screen further comprises:

[0014] A first fastener is connected through the second connecting hole and the first connecting hole.

[0015] As an optional solution of the small-pitch LED display screen, the small-pitch LED display screen further comprises:

[0016] A mask with a plurality of light transmission holes is arranged on the PCB lamp plate, and the LED light emitting member of the PCB lamp plate is located in the light transmission hole.

[0017] As an optional solution of the small-pitch LED display screen, a plurality of supporting columns are arranged on the front of the bottom shell, and second connecting columns with third connecting holes are arranged on the supporting columns. A plurality of second through holes are arranged on the PCB lamp plate, and the second connecting columns are inserted into the second through holes. A plurality of fourth connecting holes are arranged on the mask, and the small-pitch LED display screen further comprises:

[0018] A second fastener is connected through the fourth connecting hole and the third connecting hole.

[0019] As an optional solution of the small-pitch LED display screen, a plurality of first reinforcing ribs extending in a first direction are arranged on the front of the bottom shell, and / or a plurality of second reinforcing ribs extending in a second direction are arranged on the front of the bottom shell.

[0020] As an optional solution of the small-pitch LED display screen, the frame of the bottom shell is provided with a plurality of third reinforcing ribs extending along a third direction.

[0021] As an optional solution of the small-pitch LED display screen, the outer edge of the PCB lamp plate is provided with a plurality of positioning notches corresponding to the third reinforcing ribs, and the third reinforcing ribs are located in the positioning notches.

[0022] As an optional solution of the small-pitch LED display screen, the mounting lock module comprises a shell and two clamping jaws with rack portions, the end of the rotating shaft lock core is provided with a gear, and the rack portions of the two clamping jaws are engaged with the gear, and rotating the rotating shaft lock core can simultaneously extend or retract the two clamping jaws into or out of the shell.

[0023] As an optional solution of the small-pitch LED display screen, the rotating shaft lock core is provided with a U-shaped handle, and the shell is provided with a U-shaped hole corresponding to the U-shaped handle.

[0024] Compared with the prior art, the beneficial effects of the present application are:

[0025] The small-pitch LED display screen provided by the present application is installed on the front surface of the bottom shell, and the mounting lock module is installed on the back surface of the bottom shell, wherein the first through hole is arranged in the cylindrical surface of the front surface of the bottom shell, the hole wall of the first through hole is provided with an elastic plugging piece, and the PCB lamp plate is provided with a front maintenance hole corresponding to the elastic plugging piece. When a layer of potting glue is poured on the front surface of the PCB lamp plate, the potting glue can be prevented from entering the inside of the display screen. When it is necessary to make the mounting lock module enter the unlocking or locking state, the elastic plugging piece can be poked and opened by using a thimble tool, and the thimble tool can pass through the front maintenance hole and the first through hole and push the cam on the rotating shaft lock core to rotate, so that the small-pitch LED display screen can be quickly assembled and disassembled without using a motor, and the overall weight and manufacturing cost of the small-pitch LED display screen are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the contents of the embodiments of the present application and these drawings without creative labor.

[0027] Figure 1 It is the first explosion schematic view of the small-pitch LED display screen in the embodiments of the present application.

[0028] Figure 2 It is the second explosion schematic view of the small-pitch LED display screen in the embodiments of the present application. Figure 1A local enlarged view at B;

[0029] Figure 3 A local enlarged view at C; Figure 1 A local enlarged view at D;

[0030] Figure 4 A local enlarged view at E; Figure 1 A local enlarged view at F;

[0031] Figure 5 A local enlarged view at G. Figure 1

[0032] Figure 6 An assembly view of the small-pitch LED display screen in the embodiment of the utility model;

[0033] Figure 7 A sectional view in the direction of E-E; Figure 6

[0034] Figure 8 A local enlarged view at F; Figure 7

[0035] A second exploded view of the small-pitch LED display screen in the embodiment of the utility model; Figure 9

[0036] A structure view of the mask in the embodiment of the utility model; Figure 10

[0037] A local enlarged view at G. Figure 11 Figure 10

[0038] Reference signs:

[0039] 1, bottom shell; 11, cylinder; 111, first through hole; 112, elastic plugging piece; 113, limiting groove; 12, first connecting column; 121, first connecting hole; 13, support column; 131, second connecting column; 1311, third connecting hole; 14, first reinforcing rib; 15, second reinforcing rib; 16, third reinforcing rib;

[0040] 2, PCB lamp plate; 21, front maintenance hole; 22, second connecting hole; 23, LED light emitting piece; 24, second through hole; 25, positioning notch;

[0041] 3, installation lock module; 31, rotating shaft lock core; 311, cam; 312, gear; 313, U-shaped handle; 32, shell; 321, U-shaped hole; 33, clamping jaw; 331, rack part;

[0042] 4, sealing piece;

[0043] 5, mask; 51, light transmission hole; 52, fourth connecting hole;​​​​

[0044] 6. A needle tool. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0046] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the product of the present application is usually placed during use, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected. For ordinary skilled persons in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0048] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0049] In order to realize the quick assembly and disassembly of the small-pitch LED display screen without using a motor, reduce the overall weight and manufacturing cost of the small-pitch LED display screen, and avoid the entry of the potting adhesive into the display screen, the present embodiment provides a small-pitch LED display screen, which will be described below in combination with Figures 1 to 11 The specific content of the present embodiment will be described in detail. It should be noted that the first direction mentioned in the present embodiment is Figure 1X direction in the figure, the second direction mentioned in the embodiment is Figure 1 Y direction in the figure, the third direction mentioned in the embodiment is Figure 1 Z direction in the figure.

[0050] As shown in Figures 1 to 9 The small-pitch LED display screen in the embodiment includes a bottom shell 1, a PCB lamp plate 2 and a mounting lock module 3. The front surface of the bottom shell 1 is provided with two cylinders 11, each of which is provided with a first through hole 111, and the hole wall of the first through hole 111 is provided with an elastic plugging piece 112. The mounting lock module 3 is arranged on the back surface of the bottom shell 1, and the rotating shaft lock core 31 of the mounting lock module 3 is provided with a cam 311 opposite to at least one first through hole 111. The PCB lamp plate 2 is connected to the front surface of the bottom shell 1, and the PCB lamp plate 2 is provided with two front maintenance holes 21 corresponding to the two elastic plugging pieces 112, and the elastic plugging pieces 112 are used to close the front maintenance holes 21.

[0051] Briefly, the small-pitch LED display screen provided by the utility model, the PCB lamp plate 2 is installed on the front surface of the bottom shell 1, and the mounting lock module 3 is installed on the back surface of the bottom shell 1, wherein the first through hole 111 is arranged in the cylinder 11 on the front surface of the bottom shell 1, the hole wall of the first through hole 111 is provided with an elastic plugging piece 112, the PCB lamp plate 2 is provided with a front maintenance hole 21 corresponding to the elastic plugging piece 112, and the elastic plugging piece 112 can close the front maintenance hole 21. When a layer of potting glue is poured on the front surface of the PCB lamp plate 2, the potting glue can be prevented from entering the inside of the display screen. When it is necessary to make the mounting lock module 3 enter the unlocking or locking state, the elastic plugging piece 112 can be poked and opened by using the thimble tool 6, the thimble tool 6 can pass through the front maintenance hole 21 and the first through hole 111 and push the cam 311 on the rotating shaft lock core 31 to rotate, so that the small-pitch LED display screen can be quickly assembled and disassembled without using a motor, and the overall weight and manufacturing cost of the small-pitch LED display screen are reduced.

[0052] Further, the cylinder 11 is provided with a limiting groove 113 near one end of the PCB lamp panel 2, the limiting groove 113 is located at the periphery of the first through hole 111, and the small-pitch LED display screen further comprises a sealing member 4, the sealing member 4 is located in the limiting groove 113 and clamped between the PCB lamp panel 2 and the bottom shell 1. Exemplarily, the sealing member 4 can be but is not limited to an O-shaped sealing ring. The board surface of the LED lamp panel is filled with a layer of potting glue, the potting glue covers the pins of the LED light emitting element 23 and the front maintenance hole 21 designed on the LED lamp panel. When the front maintenance module is needed, the elastic plugging member 112 on the bottom shell 1 is lifted by a thimble tool 6 to break the potting glue layer of the front maintenance hole 21, at this time, the sealing glue layer of the front maintenance hole 21 and the bottom shell 1 has been damaged and cannot prevent water, by adding the sealing member 4 in the limiting groove 113 of the cylinder 11, rainwater or water vapor entering from the gap between the PCB lamp panel 2 and the bottom shell 1 can be avoided (rainwater or water vapor entering is easy to cause circuit short circuit).

[0053] Further, the front surface of the bottom shell 1 is provided with at least three first connecting columns 12, the first connecting columns 12 are provided with first connecting holes 121, the cylinder 11 is located between two adjacent first connecting columns 12, the PCB lamp panel 2 is provided with at least three second connecting holes 22, the front maintenance hole 21 is located between two adjacent second connecting holes 22, and the small-pitch LED display screen further comprises a first fastener, the first fastener passes through the second connecting hole 22 and is connected with the first connecting hole 121. Optionally, the first fastener can be but is not limited to a screw. After the first fastener passes through the second connecting hole 22 and is connected with the first connecting hole 121, the PCB lamp panel 2 and the bottom shell 1 are fixed and pressed to seal the sealing member 4, so that the purpose of preventing water from entering from the side surface around the front maintenance hole 21 is achieved.

[0054] Exemplarily, as shown in Figure 10 and Figure 11 , the small-pitch LED display screen further comprises a mask 5 provided with a plurality of light transmission holes 51, the mask 5 is arranged on the PCB lamp panel 2, and the LED light emitting element 23 of the PCB lamp panel 2 is located in the light transmission hole 51. By adding the mask 5, part of the rainwater can be blocked, and the light of the PCB lamp panel 2 can be ensured to be normal.

[0055] Further, the front surface of the bottom shell 1 is provided with a plurality of support columns 13, the support columns 13 are provided with second connecting columns 131 provided with third connecting holes 1311, the PCB lamp panel 2 is provided with a plurality of second through holes 24, the second connecting columns 131 are inserted into the second through holes 24, the mask 5 is provided with a plurality of fourth connecting holes 52, and the small-pitch LED display screen further comprises a second fastener, the second fastener passes through the fourth connecting hole 52 and is connected with the third connecting hole 1311. Exemplarily, the second fastener can be but is not limited to a bolt or a screw.

[0056] Optionally, the front surface of the bottom shell 1 is provided with a plurality of first reinforcing ribs 14 extending along a first direction, and / or the front surface of the bottom shell 1 is provided with a plurality of second reinforcing ribs 15 extending along a second direction. The frame of the bottom shell 1 is provided with a plurality of third reinforcing ribs 16 extending along a third direction. By adding the first reinforcing ribs 14, the second reinforcing ribs 15 and the third reinforcing ribs 16, the overall structural strength of the bottom shell 1 can be improved.

[0057] Further, the outer edge of the PCB lamp plate 2 is provided with a plurality of positioning notches 25 corresponding to the third reinforcing ribs 16, and the third reinforcing ribs 16 are located in the positioning notches 25. By cooperating the third reinforcing ribs 16 with the positioning notches 25, the installation accuracy of the PCB lamp plate 2 can be improved.

[0058] Further, as shown in Figure 8 Combining Figure 9 As shown, the installation lock module 3 includes a shell 32 and two clamping jaws 33 with rack portions 331, the end of the rotating shaft lock core 31 is provided with a gear 312, the rack portions 331 of the two clamping jaws 33 are engaged with the gear 312, and rotating the rotating shaft lock core 31 can make the two clamping jaws 33 simultaneously extend out of or retract into the shell 32. When the thimble tool 6 passes through one of the front maintenance holes 21 and pushes the rotating shaft lock core 31 to rotate forward, the two clamping jaws 33 are away from each other and extend out of the shell 32 and are clamped with the clamping grooves of the installation frame; when the thimble tool 6 passes through the other front maintenance hole 21 and pushes the rotating shaft lock core 31 to rotate reversely, the two clamping jaws 33 are close to each other and retract into the shell 32 and are separated from the clamping grooves of the installation frame.

[0059] Further, the rotating shaft lock core 31 is provided with a U-shaped handle 313, and the shell 32 is provided with a U-shaped hole 321 corresponding to the U-shaped handle 313. By adding the U-shaped handle 313 and the U-shaped hole 321, it is convenient for personnel to operate on the back of the small-pitch LED display screen, and the small-pitch LED display screen and the installation frame can be quickly assembled and disassembled.

[0060] It should be noted that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A small-pitch LED display screen, characterized in that, include: The bottom shell (1) has two cylinders (11) on its front side. Each cylinder (11) has a first through hole (111) through it. An elastic sealing element (112) is provided on the hole wall of the first through hole (111). The mounting lock module (3) is located on the back of the bottom shell (1). The rotating lock cylinder (31) of the mounting lock module (3) is provided with a cam (311), which is opposite to at least one of the first through holes (111). PCB light board (2), the PCB light board (2) is connected to the front of the bottom shell (1), the PCB light board (2) has two front maintenance holes (21) corresponding to the two elastic sealing members (112), the elastic sealing members (112) are used to close the front maintenance holes (21).

2. The small-pitch LED display screen according to claim 1, characterized in that, A limiting groove (113) is provided at one end of the cylinder (11) near the PCB lamp board (2). The limiting groove (113) is located around the first through hole (111). The small-pitch LED display screen also includes: A sealing element (4) is located in the limiting groove (113) and sandwiched between the PCB lamp board (2) and the bottom shell (1).

3. The small-pitch LED display screen according to claim 2, characterized in that, The front of the bottom shell (1) is provided with at least three first connecting posts (12), and the first connecting posts (12) are provided with first connecting holes (121). The cylinder (11) is located between two adjacent first connecting posts (12). The PCB lamp board (2) is provided with at least three second connecting holes (22), and the front maintenance hole (21) is located between two adjacent second connecting holes (22). The small-pitch LED display screen also includes: The first fastener passes through the second connecting hole (22) and is connected to the first connecting hole (121).

4. The small-pitch LED display screen according to claim 2, characterized in that, The small-pitch LED display screen also includes: A mask (5) with multiple light-transmitting holes (51) is disposed on the PCB lamp board (2), and the LED light-emitting element (23) of the PCB lamp board (2) is located in the light-transmitting holes (51).

5. The small-pitch LED display screen according to claim 4, characterized in that, The front of the bottom shell (1) is provided with several support columns (13), and the support columns (13) are provided with second connecting columns (131) having third connecting holes (1311). The PCB lamp board (2) is provided with several second through holes (24), and the second connecting columns (131) are inserted into the second through holes (24). The face mask (5) is provided with several fourth connecting holes (52). The small-pitch LED display screen also includes: The second fastener passes through the fourth connecting hole (52) and is connected to the third connecting hole (1311).

6. The small-pitch LED display screen according to claim 2, characterized in that, The front side of the bottom shell (1) is provided with a plurality of first reinforcing ribs (14) extending in a first direction, and / or the front side of the bottom shell (1) is provided with a plurality of second reinforcing ribs (15) extending in a second direction.

7. The small-pitch LED display screen according to claim 2, characterized in that, The bottom shell (1) has a plurality of third reinforcing ribs (16) extending in a third direction on its frame.

8. The small-pitch LED display screen according to claim 7, characterized in that, The outer edge of the PCB lamp board (2) is provided with multiple positioning notches (25) corresponding to the third reinforcing rib (16), and the third reinforcing rib (16) is located in the positioning notches (25).

9. The small-pitch LED display screen according to any one of claims 2-8, characterized in that, The mounting lock module (3) includes a housing (32) and two pawls (33) with rack portions (331). The end of the rotating shaft lock core (31) is provided with a gear (312). The rack portions (331) of the two pawls (33) are engaged with the gear (312). Rotating the rotating shaft lock core (31) can cause the two pawls (33) to extend or retract from the housing (32) at the same time.

10. The small-pitch LED display screen according to claim 9, characterized in that, The pivot lock cylinder (31) is provided with a U-shaped handle (313), and the outer shell (32) is provided with a U-shaped hole (321) corresponding to the U-shaped handle (313).

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