Surface-mounted iron sheet with exhaust groove for COB (Chip On Board) surface-mounted lamp panel and display module

Abstract

The utility model belongs to the technical field of LED display, and relates to a chip iron sheet used for a COB chip lamp panel and provided with exhaust grooves and a display module, the chip iron sheet is applied to the back face of the COB chip lamp panel and comprises an iron sheet body, the front end of the iron sheet body is provided with a circular groove and the exhaust grooves, the exhaust grooves are symmetrically arranged with the diameter of the circular groove as the symmetry axis, and the exhaust grooves are arranged in the circular groove. The inner end is communicated with the circular groove, and the outer end extends to the outer side wall of the iron sheet body; the inner ends of the two exhaust grooves extend towards the circle center of the circular groove to form first inverted buckles, and the first inverted buckles are used for being matched with second inverted buckles of a patch soldering tin layer formed during welding. The patch iron sheet has the advantages that due to the fact that the iron sheet body is provided with the circular groove, the exhaust groove and the first inverted buckle, in the welding process, soldering tin forms a patch soldering tin layer with the second inverted buckle, the first inverted buckle and the second inverted buckle are buckled with each other, the welding firmness is improved, and the technical problem that the welding stability of an existing patch iron sheet is not ideal can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED display technical field especially relates to a kind of for COB patch lamp panel with exhaust groove's patch iron sheet and display module. BACKGROUND

[0002] In the development process of LED lighting technology, COB (Chip on Board) patch lamp panel is favored by market due to its high efficiency, compact design. In the existing COB patch lamp panel welding technology, patch iron sheet is usually fixed on the solder pad of lamp panel by welding.

[0003] However, in the long-term use process, or when subjected to external force, patch iron sheet is prone to loosen and fall off, in addition, patch iron sheet is difficult to effectively discharge air and bubbles in the welding process, often resulting in defects in welding points, such as bubbles, loose welding and other problems. These problems can weaken the structural strength of welding points, reduce heat dissipation efficiency, and even cause the iron sheet to fall off in later use. SUMMARY

[0004] (I) technical problem to be solved

[0005] In view of the above shortcomings and deficiencies of the prior art, the utility model provides a kind of for COB patch lamp panel with exhaust groove's patch iron sheet and display module, which solves the technical problem that the welding stability of the existing patch iron sheet is not ideal.

[0006] (II) technical scheme

[0007] In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises:

[0008] In the first aspect, the utility model embodiment provides a kind of for COB patch lamp panel with exhaust groove's patch iron sheet, applied in the back of COB patch lamp panel, including iron sheet body, the front end of the iron sheet body is provided with circular recess and exhaust groove, the circular recess is located at the center of the front end of the iron sheet body, the exhaust groove is symmetrically arranged with the diameter of the circular recess as the symmetry axis, the inner end thereof is communicated with the circular recess, and the outer end thereof extends to the outer side wall of iron sheet body.

[0009] The inner end of two exhaust grooves extends to the center of the circular recess to form a first undercut, and the first undercut is used to cooperate with the second undercut of the patch solder layer formed during welding.

[0010] Optionally, the iron sheet body is in the form of a circular cake, and the front end face thereof is further provided with a patch mating surface, the patch mating surface comprises two opposite fan-shaped surfaces of the same size, and the two fan-shaped surfaces are separated from each other by two exhaust grooves.

[0011] Optionally, the inner arc edge of the sector surface and the sidewall of the circular groove coincide with each other.

[0012] Optionally, the third undercut is arranged along the inner arc edge of the sector surface.

[0013] Optionally, the outer circle step is arranged around the front end of the iron sheet body, and the diameter of the front end of the iron sheet body is smaller than the diameter of the rear end.

[0014] Optionally, the circular groove and the exhaust groove are formed by stamping process, and the first undercut is formed by stamping extrusion process.

[0015] Optionally, the third undercut of the iron sheet body is formed by stamping extrusion process.

[0016] In the second aspect, the utility model provides a display module, including COB patch lamp board and preceding one kind of for COB patch lamp board with exhaust groove's patch iron sheet, the iron sheet body is welded on the solder pad of the back of COB patch lamp board, and forms the patch solder layer between the solder pad and the iron sheet body, the first undercut and / or third undercut of the iron sheet body and the second undercut of the patch solder layer are closed together.

[0017] (Three) beneficial effects

[0018] The utility model has the advantages of:

[0019] 1. The patch iron sheet for the COB patch lamp board with the exhaust groove and the display module, because the iron sheet body is stamped out of the circular groove and the exhaust groove by the stamping process, and the first undercut is formed by stamping extrusion at the inner end of the exhaust groove, when welding, the solder forms the patch solder layer with the second undercut between the solder pad and the iron sheet body, the first undercut and the second undercut are closed together, the welding firmness is improved, the iron sheet body is not easy to fall off when stressed, compared with the prior art, it can solve the technical problem that the welding stability of the existing patch iron sheet is not ideal.

[0020] 2. The exhaust groove can discharge the air and the bubble in the circular groove when welding, and guide the solder to flow on the solder pad, the strength and the stability of the welding point are better, and the patch iron sheet is more firmly welded on the back of the COB patch lamp board. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the front view schematic drawing of the patch iron sheet of the embodiment 1 of the patch iron sheet for the COB patch lamp board with the exhaust groove and the display module of the utility model;

[0022] Figure 2 It is the front view schematic drawing of the patch iron sheet of the embodiment 1 of the patch iron sheet for the COB patch lamp board with the exhaust groove and the display module of the utility model; Figure 1 It is the section schematic drawing of A-A in the middle.

[0023] Figure 3 It is the welding schematic view of the patch iron sheet of the embodiment 1 of the patch iron sheet and display module for the COB patch lamp panel with exhaust groove of the utility model;

[0024] Figure 4 It is the front view schematic view of the patch iron sheet of the embodiment 2 of the patch iron sheet and display module for the COB patch lamp panel with exhaust groove of the utility model;

[0025] Figure 5 It is the welding schematic view of the patch iron sheet of the embodiment 2 of the patch iron sheet and display module for the COB patch lamp panel with exhaust groove of the utility model.

[0026]

Explanation of Mark

[0027] 1, circular groove;

[0028] 2, exhaust groove;

[0029] 31, first reverse buckle;

[0030] 32, third reverse buckle;

[0031] 4, outer ring step;

[0032] 5, patch matching surface;

[0033] 100, iron sheet body;200, patch solder layer;201, second reverse buckle;300, COB patch lamp panel. Specific Implementation

[0034] In order to better explain the utility model, so as to facilitate understanding, the following specific implementation, the utility model is described in detail by combining with the drawings. Wherein, the "upper", "lower" and other orientation terms mentioned in this paper are with the orientation of the COB patch lamp panel 300 as the reference, with the direction of the iron sheet body 100 as "back". Figure 3

[0035] ​The utility model discloses a kind of for COB patch lamp panel with exhaust groove's patch iron sheet and display module, wherein, patch iron sheet is applied to the back of COB patch lamp panel, including iron sheet body, the front end of the iron sheet body is provided with circular recess and exhaust groove, the circular recess is located at the center of the front end of the iron sheet body, the exhaust groove is symmetrically arranged with the diameter of the circular recess as symmetry axis, its inner end is communicated with the circular recess, and its outer end extends to the outer side wall of iron sheet body;The inner end of two exhaust grooves is formed with first undercut towards the center of the circular recess, and the first undercut is used to be mutually matched with the second undercut of patch solder layer formed when welding;Since iron sheet body is punched out circular recess and exhaust groove by stamping process, and first undercut is formed by stamping extrusion at the inner end of exhaust groove, when welding, solder forms patch solder layer with second undercut between pad and iron sheet body, first undercut and second undercut are mutually buckled together, improve the firmness of welding, so that iron sheet body is not easy to fall off when stressed, relative to prior art, it can solve the technical problem that the welding stability of existing patch iron sheet is not ideal.

[0036] To better understand the above technical solutions, the exemplary embodiments of the utility model will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the utility model and to convey the scope of the utility model to those skilled in the art.

[0037] Embodiment 1:

[0038] Referring to Figures 1 to 3 , embodiment 1 provides a kind of for COB patch lamp panel with exhaust groove's patch iron sheet, applied to the back of COB patch lamp panel 300, including iron sheet body 100, the front end of iron sheet body 100 is provided with circular recess 1 and exhaust groove 2, circular recess 1 is located at the center of the front end of iron sheet body 100, exhaust groove 2 is symmetrically arranged with the diameter of circular recess 1 as symmetry axis, its inner end is communicated with circular recess 1, and its outer end extends to the outer side wall of iron sheet body 100.

[0039] Referring to Figure 1 And Figure 2 , in some feasible schemes, the inner end of two exhaust grooves 2 is formed with first undercut 31 towards the center of circular recess 1, and first undercut 31 is used to be mutually matched with the second undercut 201 of patch solder layer 200 formed when welding, so that iron sheet body 100 is more firmly welded on the back of COB patch lamp panel 300.

[0040] Referring to Figure 1 And Figure 3, the front end surface of the iron piece body 100 is provided with a patch matching surface 5, the patch matching surface 5 includes two opposite fan-shaped surfaces with the same size, and the two fan-shaped surfaces are separated from each other by two exhaust grooves 2. During welding, the patch matching surface 5 abuts against the back surface of the COB patch lamp panel 300.

[0041] Continuing to refer to Figure 1 , the inner arc edge of the fan-shaped surface coincides with the side wall of the circular groove 1. That is to say, the front end of the circular groove 1 is only provided with a first undercut 31 structure at the exhaust groove 2, and the inner arc edge of the fan-shaped surface is not provided with an undercut structure.

[0042] Referring to Figure 1 and Figure 2 , the outer ring step 4 is arranged at the four peripheral edges of the front end of the iron piece body 100, and the diameter of the front end of the iron piece body 100 is smaller than the diameter of the rear end. During welding, excess solder can be placed at the outer ring step 4 to reinforce the welding effect of the iron piece body 100 on the COB patch lamp panel 300.

[0043] In actual production, the circular groove 1 and the exhaust groove 2 are formed by stamping process, and the first undercut 31 is formed by stamping and extrusion process. The entire iron piece body 100 is integrally formed.

[0044] The production process steps of the iron piece body 100 are as follows: cutting an iron bar into circular iron pieces with the same size along the radial direction, stamping out the circular groove 1, then stamping out two exhaust grooves 2, extruding the first undercut 31 by stamping the exhaust groove 2, stamping out the outer ring step 4, stamping and flattening the fan-shaped surface, and stamping the iron piece body 100 to correct the outer diameter of the iron piece.

[0045] Example 2:

[0046] Referring to Figure 4 and Figure 5 , on the basis of example 1, the third undercut 32 is arranged along the inner arc edge of the fan-shaped surface of the iron piece body 100, the area of the third undercut 32 engaged with the second undercut 201 is larger, and the other parts remain unchanged. The third undercut 32 of the iron piece body 100 is formed by stamping and extrusion process. Specifically, when the fan-shaped surface is stamped and flattened, the third undercut 32 is formed by extruding the outer ring step 4. The iron piece body 100 is provided with the first undercut 31 and the third undercut 32, which can be engaged with the third undercut 32 to form a clamping and locking structure. Then, the exhaust groove 2 is used to exhaust the bubbles during welding, so as to avoid the bubbles gathering at the first undercut 31 and the third undercut 32, and the welding quality is higher, more firm and reliable.

[0047] Example 3:

[0048] The embodiment 3 provides a display module, comprising a COB patch lamp panel 300 and a patch iron sheet for the COB patch lamp panel with exhaust grooves according to the embodiment 1 or the embodiment 2, and the display module is a COB display module. The iron sheet body 100 is welded on the pads on the back of the COB patch lamp panel 300, and a patch solder layer 200 is formed between the pads and the iron sheet body 100, and the first undercut 31 and / or the third undercut 32 of the iron sheet body 100 are buckled together with the second undercut 201 of the patch solder layer 200. The back of the iron sheet body 100 is adsorbed and fixed together with the magnet on the display box, and meanwhile the iron sheet body 100 can also transmit the heat generated by the COB patch lamp panel 300 during work to the display box, thereby helping heat dissipation.

[0049] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0050] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature is "above", "above" and "above" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0052] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0053] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A surface mount metal sheet with venting grooves for use in COB surface mount LED panels, applied to the back side of a COB surface mount LED panel (300), characterized in that: The device includes an iron sheet body (100), the front end of which is provided with a circular groove (1) and an exhaust groove (2). The circular groove (1) is located at the center of the front end face of the iron sheet body (100), and the exhaust groove (2) is symmetrically arranged with the diameter of the circular groove (1) as the axis of symmetry. Its inner end is connected to the circular groove (1), and its outer end extends to the outer wall of the iron sheet body (100). The inner ends of the two venting grooves (2) extend toward the center of the circular groove (1) to form a first buckle (31), which is used to cooperate with the second buckle (201) of the patch solder layer (200) formed during welding.

2. The patch metal sheet with venting groove for COB patch lamp boards as described in claim 1, characterized in that: The iron sheet body (100) has a disc-shaped structure, and its front end face is also provided with a patch mating surface (5). The patch mating surface (5) includes two opposite fan-shaped surfaces of the same size, and the two fan-shaped surfaces are separated from each other by the two exhaust grooves (2).

3. The patch metal sheet with venting groove for COB patch lamp boards as described in claim 2, characterized in that: The inner arc edge of the fan-shaped surface overlaps with the side wall of the circular groove (1).

4. A surface mount iron sheet with venting groove for COB surface mount LED boards as described in claim 2, characterized in that: The iron sheet body (100) is provided with a third buckle (32) along the inner arc edge of the fan-shaped surface.

5. A surface mount iron sheet with venting groove for COB surface mount LED boards as described in any one of claims 3 or 4, characterized in that: The front end of the iron sheet body (100) is provided with an outer ring step (4) around its perimeter, and the diameter of the front end of the iron sheet body (100) is smaller than the diameter of the rear end.

6. A surface mount iron sheet with venting groove for COB surface mount LED boards as described in claim 5, characterized in that: The circular groove (1) and the vent groove (2) are formed by stamping process, and the first undercut (31) is formed by stamping and extrusion process.

7. A surface mount iron sheet with venting groove for COB surface mount LED boards as described in claim 4, characterized in that: The third buckle (32) of the iron sheet body (100) is formed by a stamping and extrusion process.

8. A display module, characterized in that: The device includes a COB surface mount LED board (300) and a surface mount metal sheet with venting grooves for a COB surface mount LED board as described in any one of claims 1 to 7. The metal sheet body (100) is soldered to a pad on the back side of the COB surface mount LED board (300), and a surface mount solder layer (200) is formed between the pad and the metal sheet body (100). The first buckle (31) and / or the third buckle (32) of the metal sheet body (100) are engaged with the second buckle (201) of the surface mount solder layer (200).

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