Outdoor display screen three-proof paint spraying jig

Abstract

This utility model relates to the technical field of conformal coating equipment, and provides a conformal coating fixture for outdoor displays. The fixture includes a placement frame and a support rod within the placement frame. At least one mounting hole is provided on the placement frame or support rod, and a detachable positioning post is installed within the mounting hole. By incorporating a detachable positioning post structure on the conformal coating fixture, the positioning post can be promptly replaced when it becomes contaminated during conformal coating, preventing interference with positioning and contamination of the edges of the next PCB to be coated, thus affecting product quality. The positioning post structure of this fixture is simple, easy to install and replace, provides good positioning effect, and improves the first-pass yield of the product.

Description

Technical Field

[0001] This utility model belongs to the technical field of conformal coating processing equipment, and in particular relates to a conformal coating jig for outdoor display screens. Background Technology

[0002] In current LED outdoor display production, to protect electronic components such as ICs from moisture and prevent performance failure, conformal coating is applied to the IC side of the PCB, requiring the use of conformal coating fixtures to fix the PCB. Patent CN 217615453U discloses a conformal coating fixture, which includes a body and positioning blocks. The body has a product groove for placing the PCB board, and reinforcing ribs are provided inside the product groove. Positioning blocks are spaced around the product groove, with a rounded top on the side of the positioning blocks facing the product groove and a groove at the bottom on the same side. By providing reinforcing ribs inside the product groove of the body, the body is reinforced, improving the impact resistance of the conformal coating fixture, preventing deformation, and extending its service life. When the PCB board is placed in the conformal coating jig, the back of the PCB board faces upwards. Positioning blocks around the product slot position the front of the PCB board containing the LED tubes. The contact area between the positioning blocks and the PCB board is rounded to prevent the positioning blocks from getting stuck in the gaps between the LED tubes. A groove is provided at the bottom of the positioning blocks to prevent contact between the LED tubes and the positioning blocks, thereby reducing the probability of LED collisions during PCB board processing and improving the first-pass yield. However, this method of fixing the PCB with surrounding fixing blocks has the following problems: During the conformal coating process, conformal coating residue remains on the jig, contaminating the edges of the next PCB; after repeated use of the jig, the thickness of the residual conformal coating on the fixing blocks gradually increases, affecting the clamping and fixing effect on the PCB, preventing the PCB from being placed horizontally, resulting in incomplete conformal coating. Furthermore, during automatic board removal, collisions may occur, causing product defects and reducing product quality; the jig requires regular manual cleaning to remove residual adhesive, increasing labor costs. Utility Model Content

[0003] This invention provides a conformal coating fixture for outdoor displays, which can effectively solve the above-mentioned problems.

[0004] This utility model is implemented as follows:

[0005] An outdoor display screen conformal coating spraying fixture includes a placement frame and a support rod inside the placement frame. At least one mounting hole is provided on the placement frame or the support rod, and a detachable positioning post is provided in the mounting hole.

[0006] As a further improvement, the placement frame is provided with a first mounting hole around its perimeter. A first positioning post is provided in the first mounting hole. The first positioning post is provided with a positioning ball, a connecting screw, and a nut seat. The outer diameter of the positioning ball and the nut seat is larger than the diameter of the first mounting hole. The positioning ball is fixedly connected to the connecting screw, and the connecting screw passes through the first mounting hole and is connected to the nut seat.

[0007] As a further improvement, the first mounting hole is a strip-shaped hole.

[0008] As a further improvement, the placement frame is provided with at least two workstations, and a first mounting hole is provided on the support plate between adjacent workstations. A first positioning post is provided in the first mounting hole. The first positioning post is provided with a positioning ball, a connecting screw and a nut seat. The outer diameter of the positioning ball and the nut seat is larger than the diameter of the first mounting hole. The positioning ball is fixedly connected to the connecting screw, and the connecting screw passes through the first mounting hole and is connected to the nut seat.

[0009] As a further improvement, the support rod is provided with a second mounting hole, and a second positioning post is provided in the second mounting hole. The second positioning post is provided with a positioning cone, a plug rod and a base. The upper port diameter of the positioning cone is smaller than the diameter of the screw hole on the PCB, and the lower port diameter is larger than the diameter of the screw hole on the PCB and the second mounting hole. The plug rod is provided in the second mounting hole, and both ends of the plug rod are connected to the positioning cone and the base, and at least one end is detachably connected.

[0010] As a further improvement, one side of the support rod is provided with a slot that communicates with the second mounting hole, and both ends of the insertion rod are fixedly connected to the positioning cone and the base or are an integral structure. The insertion rod is installed in the second mounting hole through the slot.

[0011] As a further improvement, the opening width of the slot is smaller than the diameter of the second mounting hole.

[0012] As a further improvement, the second mounting hole is provided on the support rod parallel to the production direction, and the opening of the slot is perpendicular to the support rod.

[0013] As a further improvement, the second mounting hole is provided on a support rod perpendicular to the production direction. There are at least two support rods, and each support rod has at least one second mounting hole. The opening directions of the slots on different support rods are opposite, while the opening directions of the slots on the same support rod are the same.

[0014] The beneficial effects of this utility model are as follows: This fixture, by incorporating a detachable positioning post structure on the conformal coating spraying fixture, allows for timely replacement of the positioning posts when they become contaminated during conformal coating, preventing interference with positioning and contamination of the edges of the next PCB to be coated, thus avoiding impacts on product quality. The positioning post structure of this fixture is simple, easy to install and replace, provides excellent positioning, and improves the first-pass yield of the product. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram illustrating the application state of an embodiment of the conformal coating spraying fixture for outdoor displays according to this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the conformal coating spraying fixture for outdoor display screens provided by this utility model;

[0018] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0019] Figure 4 This is a schematic diagram of the structure of the first positioning column provided in an embodiment of the conformal coating spraying fixture for outdoor display screens of this utility model;

[0020] Figure 5 This is a schematic diagram illustrating the application state of an embodiment of the conformal coating spraying fixture for outdoor displays according to this utility model;

[0021] Figure 6 This is a top view of an embodiment of an outdoor display screen conformal coating spraying fixture according to the present invention;

[0022] Figure 7 yes Figure 6 Enlarged structural diagram at point B;

[0023] Figure 8 This is another structural schematic diagram of an outdoor display screen conformal coating spraying fixture according to the present invention;

[0024] Figure 9 yes Figure 8 Enlarged structural diagram at point C;

[0025] Figure 10This is a schematic diagram of the structure of the second positioning column provided in an embodiment of the conformal coating fixture for outdoor display screens according to this utility model.

[0026] Figure label:

[0027] Placement frame 1; first mounting hole 11; first positioning post 12; positioning ball post 121; connecting screw 122; nut seat 123; support rod 2; second mounting hole 21; slot 211; second positioning post 22; positioning cone 221; insertion rod 222; base 223. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0029] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the description of this utility model, the terms "upper", "middle", "side", "side", "upper side", "end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Reference Figure 1-10 As shown, an outdoor display screen conformal coating spraying fixture includes a placement frame 1 and a support rod 2 inside the placement frame 1. At least one mounting hole is provided on the placement frame 1 or the support rod 2, and a detachable positioning post is provided in the mounting hole.

[0032] Removable positioning posts facilitate replacement. During conformal coating, they can be replaced if there is still conformal coating residue on the positioning posts, preventing contamination of the edges of the next PCB. Alternatively, after repeated use of the fixture, the thickness of the conformal coating residue on the positioning posts gradually increases, affecting the clamping and fixing effect on the PCB, preventing the PCB from being placed horizontally, leading to incomplete conformal coating, and potentially causing collisions during automatic board removal, resulting in product defects and reduced product quality. Removable positioning posts effectively solve these problems.

[0033] Furthermore, the placement frame 1 is provided with first mounting holes 11 around its perimeter. A first positioning post 12 is provided within the first mounting hole 11. The first positioning post 12 includes a positioning ball post 121, a connecting screw 122, and a nut seat 123. The outer diameters of both the positioning ball post 121 and the nut seat 123 are larger than the diameter of the first mounting hole 11. The positioning ball post 121 is fixedly connected to the connecting screw 122, and the connecting screw 122 passes through the first mounting hole 11 and connects to the nut seat 123. Figure 1-4 As shown.

[0034] First positioning posts 12 are set around the fixture, which can be disassembled and rotated. Compared with the existing fixing blocks, the contact with the PCB is changed from surface contact to point contact. When the first positioning posts 12 are coated with conformal coating, the contact point between the first positioning posts 12 and the PCB can be changed by rotating the spherical surface of the first positioning posts 12, so as to avoid the residual glue on the first positioning posts 12 from contaminating the PCB. Replacement and cleaning are only required when there is residual glue at all angles of the first positioning posts 12. There is no need to clean the entire fixture, which improves production efficiency and reduces the maintenance time required for the fixture.

[0035] Furthermore, the first mounting hole 11 is a strip-shaped hole.

[0036] The fixture is provided with a first mounting hole 11 for inserting the first positioning post 12. The first positioning post 12 is locked and fixed to the fixture by a nut. The first mounting hole 11 is set to an elongated elliptical shape. When the PCB size is changed, the position of the first positioning post 12 in the strip hole can be adjusted to match PCBs of different sizes, thereby improving the compatibility of the fixture.

[0037] Furthermore, the placement frame 1 is provided with at least two workstations, and a first mounting hole 11 is provided on the support plate between adjacent workstations. A first positioning post 12 is provided in the first mounting hole 11. The first positioning post 12 is provided with a positioning ball post 121, a connecting screw 122 and a nut seat 123. The outer diameters of the positioning ball post 121 and the nut seat 123 are both larger than the diameter of the first mounting hole 11. The positioning ball post 121 is fixedly connected to the connecting screw 122. The connecting screw 122 passes through the first mounting hole 11 and is connected to the nut seat 123.

[0038] It can achieve simultaneous positioning at dual or multiple workstations, improving spraying efficiency.

[0039] Furthermore, the support rod 2 is provided with a second mounting hole 21, and a second positioning post 22 is provided in the second mounting hole 21. The second positioning post 22 is provided with a positioning cone 221, a plug rod 222, and a base 223. The upper port diameter of the positioning cone 221 is smaller than the diameter of the screw hole on the PCB, and the lower port diameter is larger than the diameter of the screw hole on the PCB and the diameter of the second mounting hole 21. The plug rod 222 is disposed in the second mounting hole 21, and both ends of the plug rod 222 are connected to the positioning cone 221 and the base 223, and at least one end is detachably connected. Figure 4-10 As shown.

[0040] The second positioning pin 22 is inserted into the second mounting hole 21, which corresponds to the screw hole on the PCB. The upper end of the positioning cone 221 is then inserted into the screw hole. The positioning cone 221 and the base 223 stabilize the second positioning pin 22 within the second mounting hole 21, achieving positioning installation. The positioning cone 221 and the insertion rod 222 are detachably connected, allowing for replacement if the positioning cone 221 becomes contaminated and unusable, without requiring cleaning of the entire fixture, thus improving production efficiency and reducing fixture maintenance time.

[0041] Furthermore, one side of the support rod 2 is provided with a slot 211 that communicates with the second mounting hole 21. The two ends of the insertion rod 222 are fixedly connected to the positioning cone 221 and the base 223 or are an integral structure. The insertion rod 222 is installed in the second mounting hole 21 through the slot 211.

[0042] The integrated design of the second positioning post 22 reduces assembly time. The insertion rod 222 can be quickly inserted into the second mounting hole 21 through the side groove 211 of the second mounting hole 21.

[0043] Furthermore, the opening width of the slot 211 is smaller than the diameter of the second mounting hole 21.

[0044] By applying a certain amount of pressure, the insertion rod 222 is installed into the second mounting hole 21, making the second positioning post 22 more securely installed.

[0045] Furthermore, the second mounting hole 21 is provided on the support rod 2 parallel to the production direction, and the opening of the slot 211 is perpendicular to the support rod 2.

[0046] Furthermore, the second mounting hole 21 is provided on the support rod 2 perpendicular to the production direction. There are at least two support rods 2, and each support rod 2 has at least one second mounting hole 21. The opening directions of the slots 211 on different support rods 2 are opposite, while the opening directions of the slots 211 on the same support rod 2 are the same.

[0047] To prevent the slots 211 from facing the same side, which could cause the second positioning pin 22 to move or tilt in one direction and disengage from the second mounting hole 21.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A conformal coating fixture for outdoor display screens, characterized in that, It includes a placement frame and a support rod inside the placement frame. The placement frame or support rod has at least one mounting hole, and a detachable positioning post is provided in the mounting hole.

2. The outdoor display screen conformal coating spraying fixture according to claim 1, characterized in that, The placement frame is provided with a first mounting hole around its perimeter. A first positioning post is provided in the first mounting hole. The first positioning post is provided with a positioning ball, a connecting screw, and a nut seat. The outer diameter of the positioning ball and the nut seat is larger than the diameter of the first mounting hole. The positioning ball is fixedly connected to the connecting screw. The connecting screw passes through the first mounting hole and is connected to the nut seat.

3. The outdoor display screen conformal coating spraying fixture according to claim 2, characterized in that, The first mounting hole is a strip-shaped hole.

4. The outdoor display screen conformal coating spraying fixture according to claim 2, characterized in that, The placement frame has at least two workstations. A first mounting hole is provided on the support plate between adjacent workstations. A first positioning post is provided in the first mounting hole. The first positioning post has a positioning ball, a connecting screw, and a nut seat. The outer diameter of the positioning ball and the nut seat is larger than the diameter of the first mounting hole. The positioning ball is fixedly connected to the connecting screw. The connecting screw passes through the first mounting hole and is connected to the nut seat.

5. The outdoor display screen conformal coating spraying fixture according to claim 1, characterized in that, The support rod is provided with a second mounting hole, and a second positioning post is provided in the second mounting hole. The second positioning post is provided with a positioning cone, a plug rod and a base. The upper port diameter of the positioning cone is smaller than the diameter of the screw hole on the PCB, and the lower port diameter is larger than the diameter of the screw hole and the second mounting hole on the PCB. The plug rod is provided in the second mounting hole, and both ends of the plug rod are connected to the positioning cone and the base, and at least one end is detachably connected.

6. The outdoor display screen conformal coating spraying fixture according to claim 5, characterized in that, The support rod has a slot on one side that communicates with the second mounting hole. The two ends of the insertion rod are fixedly connected to the positioning cone and the base or are an integral structure. The insertion rod is installed in the second mounting hole through the slot.

7. The outdoor display screen conformal coating spraying fixture according to claim 6, characterized in that, The opening width of the slot is smaller than the diameter of the second mounting hole.

8. A conformal coating spraying fixture for outdoor displays according to claim 6 or 7, characterized in that, The second mounting hole is located on the support rod parallel to the production direction, and the opening of the slot is perpendicular to the support rod.

9. A conformal coating fixture for outdoor displays according to claim 5, 6, or 7, characterized in that, The second mounting hole is provided on the support rod perpendicular to the production direction. There are at least two support rods, and each support rod has at least one second mounting hole. The opening direction of the slots on different support rods is opposite, while the opening direction of the slots on the same support rod is the same.

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