Iron stand twist foot and PCB welding fixing structure

Abstract

The utility model discloses an iron stand twist foot and PCB welding fixing structure comprising a display assembly which is composed of a PCB, an iron stand, an LCD and a backlight, the iron stand installed on the outer side of the PCB, the LCD installed in the iron stand, the backlight installed on one side of the LCD and attached to the PCB, and a plurality of iron stand twist feet installed on the two sides of the outer end of the iron stand. According to the welding and fixing structure for the iron stand twisted foot and the PCB, when a display module is produced and welded, the PCB copper exposing area and the iron stand twisted foot are both designed to be in a horseshoe shape, and the horseshoe-shaped size of the PCB copper exposing area is larger than the horseshoe-shaped twisted foot shape of the iron stand twisted foot, so that the PCB copper exposing area is prevented from being completely covered by the iron stand twisted foot, the PCB copper exposing area can be effectively prevented from being shielded by the iron stand twisted foot, and the production efficiency of the display module is improved. Soldering tin can be ensured to permeate into a PCB exposed copper area covered by the iron stand twist foot, so that the welding firmness between the iron stand twist foot and the PCB is enhanced, and the risk that the iron stand twist foot and the PCB are separated in the using process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board welding, in particular to a welding and fixing structure of an iron frame twisting foot and a PCB. Background Art

[0002] Printed circuit board is referred to as PCB board. Printed circuit board display module is an electronic display component, which is mainly composed of liquid crystal display, integrated circuit, backlight module and printed circuit board. This display module is widely used in a variety of electronic devices because of its lightness, thinness and low power consumption. In the specific technical implementation, the printed circuit board of the display module is bound to the liquid crystal display through conductive glue and fixed with an iron frame. For example, in some mobile phone designs, light-emitting diode key lights are set on the printed circuit board. These key lights are usually connected to the printed circuit board of the mobile phone motherboard and fixed above or below the display panel of the display module.

[0003] In the production, assembly and welding process of the display module, the existing display module is mainly composed of an LCD, an iron frame, a backlight and a PCB, wherein the iron frame wraps the LCD and the backlight and passes through the PCB through the iron frame twist pins for welding and fixing. However, when the inventors implemented this device, they found the following defects: since the iron frame twist pins cover the surface of the exposed copper area of ​​the PCB, the exposed copper area covered by the iron frame twist pins cannot be tinned. If the width of the iron frame twist pins is designed to be large, tinning is difficult, and the firmness after welding is insufficient, and there is a risk of separation of the two. Utility Model Content

[0004] Based on this, it is necessary to provide a welding and fixing structure of an iron frame twist foot and a PCB to address the above technical problems. When the display module is produced and welded, the iron frame is placed on the PCB, and multiple iron frame twist feet on both sides of the outer end of the iron frame are inserted into the PCB opening on the PCB, so that the iron frame twist feet are in contact with the PCB exposed copper area in the opening, so as to facilitate welding of the iron frame twist feet and the PCB exposed copper area. The PCB exposed copper area and the iron frame twist feet are both designed in a hoof shape, and the hoof size of the PCB exposed copper area is larger than the hoof shape of the iron frame twist feet, so as to prevent the iron frame twist feet from completely covering the PCB exposed copper area. This can effectively prevent the iron frame twist feet from blocking the PCB exposed copper area, ensure that the solder can penetrate into the PCB exposed copper area covered by the iron frame twist feet, thereby enhancing the firmness of the welding between the iron frame twist feet and the PCB, and reducing the risk of separation during use.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A structure for welding and fixing a twisted foot of an iron frame and a PCB, comprising: a display assembly, wherein the display assembly is composed of a PCB, an iron frame, an LCD and a backlight;

[0007] An iron frame installed on the outer side of the PCB;

[0008] An LCD installed inside the iron frame;

[0009] A backlight installed on one side of the LCD, wherein the backlight is attached to the PCB;

[0010] A plurality of iron frame twist feet are installed on both sides of the outer end of the iron frame.

[0011] Furthermore, the PCB is a printed circuit board.

[0012] Furthermore, the LCD is a liquid crystal display.

[0013] Furthermore, a plurality of PCB openings are provided on the PCB, and a PCB copper exposed area for welding with the iron frame twist pins is provided in the openings.

[0014] Furthermore, the iron frame is a frame-type structure, a display port is opened in the middle of the iron frame, and the LCD is tightly fitted with the display port.

[0015] Furthermore, the iron frame twisting feet and the PCB copper exposed area are both designed in a hoof shape.

[0016] Furthermore, the hoof-shaped size of the PCB copper exposed area is larger than the hoof-shaped twist foot shape of the iron frame twist foot.

[0017] Furthermore, an opening is provided in the middle of the hoof shape of the iron frame twist foot, and the aperture of the opening is 1.0 mm.

[0018] Furthermore, a protective layer is provided between the LCD and the backlight.

[0019] Furthermore, the protective layer is made of compressed foam material.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The utility model provides an iron frame twist foot and PCB welding fixing structure. When the display module is produced and welded, the iron frame is placed on the PCB, and multiple iron frame twist feet on both sides of the outer end of the iron frame are inserted into the PCB opening on the PCB, so that the iron frame twist feet are in contact with the PCB copper exposed area in the opening, so as to facilitate the welding of the iron frame twist feet and the PCB copper exposed area. The PCB copper exposed area and the iron frame twist feet are both designed in a hoof shape, and the hoof size of the PCB copper exposed area is larger than the hoof shape of the iron frame twist feet, so as to prevent the iron frame twist feet from completely covering the PCB copper exposed area, effectively avoiding the iron frame twist feet from blocking the PCB copper exposed area, ensuring that the solder can penetrate into the PCB copper exposed area covered by the iron frame twist feet, thereby enhancing the firmness of the welding between the iron frame twist feet and the PCB, and reducing the risk of separation during use of the two.

[0022] Secondly, a protective layer is set between the LCD and the backlight to provide pressure protection for the LCD. The protective layer is compressed foam to prevent the backlight from hitting the LCD after the iron frame and PCB are welded and installed tightly, thereby crushing or affecting the LCD display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The overall structural diagram provided by the utility model;

[0024] Figure 2 A schematic diagram of the PCB structure provided by the utility model;

[0025] Figure 3 A schematic side cross-sectional view of a PCB provided by the utility model;

[0026] Figure 4 A schematic side cross-sectional view of the iron frame and PCB provided by the utility model;

[0027] Figure 5 A schematic side cross-sectional view of a twisted foot of an iron frame provided by the utility model;

[0028] Figure 6 This is an enlarged top view of the PCB opening provided by the utility model.

[0029] The markings in the figure are as follows:

[0030] PCB1, PCB opening 101, PCB exposed copper area 102;

[0031] Iron frame 2, LCD 201, backlight 202, iron frame twist feet 203, opening 204, and protective layer 205. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0033] As described in the background technology, since the iron frame twist pin covers the surface of the exposed copper area of ​​the PCB, the exposed copper area covered by the iron frame twist pin cannot be tinned. If the width of the iron frame twist pin is designed to be large, soldering and tinning are difficult, and the firmness after soldering is not enough, there is a risk of separation between the two.

[0034] In order to solve this technical problem, the utility model provides an iron frame twist foot and PCB welding fixing structure, which is applied to the technical field of PCB board welding.

[0035] Specifically, please refer to Figure 1-6 The iron frame twisting foot and PCB welding fixing structure specifically include: a display component, wherein the display component is composed of PCB1, an iron frame 2, an LCD201 and a backlight 202;

[0036] An iron frame 2 installed on the outer side of PCB1;

[0037] LCD201 installed inside the iron frame 2;

[0038] A backlight 202 is mounted on one side of the LCD 201, and the backlight 202 is attached to the PCB 1;

[0039] A plurality of iron frame twist feet 203 are installed on both sides of the outer end of the iron frame 2.

[0040] The iron frame twist foot and PCB welding fixing structure provided by the utility model, when the display module is produced and welded, the iron frame 2 is placed on the PCB1, and the multiple iron frame twist feet 203 on both sides of the outer end of the iron frame 2 are connected and inserted into the PCB opening 101 on the PCB1, so that the iron frame twist feet 203 are in contact with the PCB copper exposed area 102 in the opening 101, so as to facilitate the welding of the iron frame twist feet 203 and the PCB copper exposed area 102, and the PCB copper exposed area 102 and the iron frame twist feet 203 are both designed in a hoof shape, and the hoof size of the PCB copper exposed area 102 is larger than the hoof-shaped twist foot shape of the iron frame twist feet 203, so as to prevent the iron frame twist feet 203 from completely covering the PCB copper exposed area 102, and effectively avoid the iron frame twist feet 203 from blocking the PCB copper exposed area 102, and ensure that the solder can penetrate into the PCB copper exposed area 102 covered by the iron frame twist feet 203, thereby enhancing the firmness of the welding between the iron frame twist feet 203 and the PCB1, and reducing the risk of separation during use.

[0041] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] Please refer to Figure 1-6 , 1. A structure for welding and fixing an iron frame with a twist foot and a PCB, comprising: a display assembly, wherein the display assembly is composed of a PCB1, an iron frame 2, an LCD201 and a backlight 202, an iron frame 2 installed on the outside of the PCB1, an LCD201 installed inside the iron frame 2, a backlight 202 installed on one side of the LCD201, and the backlight 202 is attached to the PCB1, and a plurality of iron frame twist feet 203 are installed on both sides of the outer end of the iron frame 2.

[0045] When the display module is produced and welded, the iron frame 2 is placed on the PCB1, and the multiple iron frame twist feet 203 on both sides of the outer end of the iron frame 2 are docked and inserted into the PCB opening 101 on the PCB1, so that the iron frame twist feet 203 are in contact with the PCB copper exposed area 102 in the opening 101, so as to facilitate the welding of the iron frame twist feet 203 and the PCB copper exposed area 102. The PCB copper exposed area 102 and the iron frame twist feet 203 are both designed in a hoof shape, and the hoof size of the PCB copper exposed area 102 is larger than the hoof-shaped twist foot shape of the iron frame twist feet 203, so as to prevent the iron frame twist feet 203 from completely covering the PCB copper exposed area 102, and effectively avoid the iron frame twist feet 203 from blocking the PCB copper exposed area 102, and ensure that the solder can penetrate into the PCB copper exposed area 102 covered by the iron frame twist feet 203, thereby enhancing the firmness of the welding between the iron frame twist feet 203 and the PCB1, and reducing the risk of separation during use.

[0046] Based on Example 1, PCB1 is a printed circuit board, LCD201 is a liquid crystal display screen, a plurality of PCB openings 101 are provided on PCB1, the iron frame 2 is a frame-type structure, a display port is provided in the middle of the iron frame 2, and LCD201 fits tightly against the display port.

[0047] Before use, place LCD201 and backlight 202 in sequence inside the iron frame 2, with LCD201 facing the display port in the middle of the iron frame 2, so that LCD201 fits tightly against the display port, and then fix LCD201. Then, weld the iron frame 2 to PCB1, so that PCB1, iron frame 2, LCD201 and backlight 202 form a display module.

[0048] On the basis of Example 1, a PCB copper exposed area 102 for welding with the iron frame twist foot 203 is provided in the opening 101. The iron frame twist foot 203 and the PCB copper exposed area 102 are both designed in a hoof shape, and the hoof size of the PCB copper exposed area 102 is larger than the hoof shape of the iron frame twist foot 203.

[0049] When PCB1 is welded to the iron frame 2, an opening 101 and a PCB copper exposed area 102 are provided on the PCB1, which can be used to place the iron frame twist foot 203 of the iron frame 2. Since the iron frame twist foot 203 and the PCB copper exposed area 102 are both designed in a hoof shape, the iron frame twist foot 203 and the PCB copper exposed area 102 can fit each other, and the hoof size of the PCB copper exposed area 102 is larger than the hoof shape of the iron frame twist foot 203. When the iron frame twist foot 203 is placed inside the PCB copper exposed area 102, the iron frame twist foot 203 can contact the PCB copper exposed area 102 and will not completely cover the PCB copper exposed area 102, ensuring that a part of the PCB copper exposed area 102 can be exposed, and ensuring that the solder can penetrate into the PCB copper exposed area 102 covered by the iron frame twist foot 203.

[0050] On the basis of Example 3, an opening 204 is provided in the middle of the hoof-shaped iron frame twist foot 203, and the aperture of the opening 204 is 1.0 mm.

[0051] During the contact welding process between the iron frame twist foot 203 and the PCB copper exposed area 102, an opening 204 is opened in the middle of the hoof shape of the iron frame twist foot 203, and the aperture size of the opening 204 is set to 1.0 mm, so that during welding, the solder can penetrate into the PCB copper exposed area 102 covered by the iron frame twist foot 203 through the opening 204, thereby enhancing the welding firmness between the iron frame twist foot 203 and PCB1.

[0052] On the basis of Example 1, a protective layer 205 is provided between the LCD 201 and the backlight 202 , and the protective layer 205 is made of compressed foam material.

[0053] A protective layer is provided between LCD201 and backlight 202 to provide pressure protection for LCD201. The protective layer is compressed foam to prevent the backlight 202 from hitting LCD201 after the iron frame 2 and PCB1 are welded and installed, thereby crushing or affecting the display effect of LCD201.

[0054] The use process of the iron frame twisting foot and PCB welding fixing structure provided by the utility model is as follows:

[0055] Before use, LCD201 and backlight 202 are placed in sequence inside the iron frame 2, with LCD201 facing the display port in the middle of the iron frame 2, so that LCD201 fits tightly with the display port, and then LCD201 is fixed and installed. Then, the iron frame 2 is welded to PCB1, so that PCB1, iron frame 2, LCD201 and backlight 202 form a display module. A protective layer is arranged between LCD201 and backlight 202 to provide pressure protection for LCD201. The protective layer is compressed foam to prevent the backlight 202 from hitting LCD201 after the iron frame 2 is welded and installed tightly with PCB1, thereby crushing or affecting the display effect of LCD201. When the display module is produced and welded, the iron frame 2 is placed on PCB1, so that multiple iron frames on both sides of the outer end of the iron frame 2 are The twist foot 203 is docked and inserted into the PCB opening 101 on the PCB1, so that the iron frame twist foot 203 contacts the PCB copper exposed area 102 in the opening 101, so as to facilitate the welding of the iron frame twist foot 203 and the PCB copper exposed area 102. The PCB copper exposed area 102 and the iron frame twist foot 203 are both designed in a hoof shape, and the hoof size of the PCB copper exposed area 102 is larger than the hoof-shaped twist foot shape of the iron frame twist foot 203, so as to prevent the iron frame twist foot 203 from completely covering the PCB copper exposed area 102, and effectively avoid the iron frame twist foot 203 from blocking the PCB copper exposed area 102, and ensure that the solder can penetrate into the PCB copper exposed area 102 covered by the iron frame twist foot 203, thereby enhancing the firmness of the welding between the iron frame twist foot 203 and the PCB1, and reducing the risk of separation during use.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A structure for welding and fixing a torsion foot of an iron frame to a PCB, characterized in that: include: A display component, wherein the display component is composed of a PCB (1), an iron frame (2), an LCD (201) and a backlight (202); An iron frame (2) installed on the outside of the PCB (1); An LCD (201) installed inside the iron frame (2); a backlight (202) mounted on one side of the LCD (201), wherein the backlight (202) is attached to the PCB (1); A plurality of iron frame twist feet (203) are installed on both sides of the outer end of the iron frame (2).

2. The iron frame twist foot and PCB welding fixing structure according to claim 1 is characterized in that: The PCB (1) is a printed circuit board.

3. The iron frame twist foot and PCB welding fixing structure according to claim 1 is characterized in that: The LCD (201) is a liquid crystal display screen.

4. The iron frame twist foot and PCB welding fixing structure according to claim 1 is characterized in that: The PCB (1) is provided with a plurality of PCB openings (101), and the openings (101) are provided with PCB copper exposed areas (102) for welding with the iron frame twist pins (203).

5. The iron frame twist foot and PCB welding fixing structure according to claim 1 is characterized in that: The iron frame (2) is a frame-type structure, a display port is provided in the middle of the iron frame (2), and the LCD (201) is tightly fitted to the display port.

6. The iron frame twist foot and PCB welding fixing structure according to claim 4 is characterized in that: The iron frame twisting foot (203) and the PCB copper exposed area (102) are both designed in a hoof shape.

7. The iron frame twist foot and PCB welding fixing structure according to claim 6 is characterized in that: The hoof-shaped size of the PCB copper exposed area (102) is larger than the hoof-shaped twist foot shape of the iron frame twist foot (203).

8. The iron frame twist foot and PCB welding fixing structure according to claim 6, characterized in that: An opening (204) is provided in the middle of the hoof shape of the iron frame twist foot (203), and the opening (204) has a diameter of 1.0 mm.

9. The iron frame twist foot and PCB welding fixing structure according to claim 1, characterized in that: A protective layer (205) is provided between the LCD (201) and the backlight (202).

10. The iron frame twist foot and PCB welding fixing structure according to claim 9, characterized in that: The protective layer (205) is made of compressed foam material.

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