Glue pouring positioning jig for outdoor display screen

Abstract

The utility model provides a glue pouring positioning jig for an outdoor display screen, which comprises a PCB (printed circuit board) with a plurality of screw holes, and further comprises a jig body, a positioning part is arranged on the jig body, a glue filling needle can be connected into the positioning part, the positioning part is used for correcting the glue filling needle, or the positioning part is used for positioning the glue filling position of the glue filling needle; a plurality of ejector pins are arranged on the lower end face of the jig body, can penetrate into corresponding screw holes of the PCB, are used for positioning and aligning the jig and the PCB, and are used for being matched with the positioning part to complete positioning and aligning of the glue filling needle and the PCB. The positioning part is arranged on the jig body, and the positioning part is connected into the glue filling needle on the glue filling head to realize correction; through the cooperation of the ejector pin which is arranged at the lower end of the jig body and can be inserted into the screw hole of the PCB and the glue pouring needle connected into the positioning part, the positioning of the glue pouring needle and the PCB can be completed, so that the deviation of the position of the glue pouring needle relative to the PCB is avoided, the accurate glue pouring position is ensured, and the positioning does not need to be observed by human eyes.

Description

Technical Field

[0001] The utility model relates to the technical field of glue pouring on display screens, in particular to a positioning fixture for glue pouring on outdoor display screens. Background Art

[0002] Existing outdoor LED display products need to be glued on the PCB board to improve waterproof and dustproof performance. Figure 1 , Figure 2 As shown, when pouring silicone, the starting point and end point of the pouring, the alignment of the upper and lower positions of the pouring head, etc. are all set by human visual observation; this can easily lead to setting deviations caused by inaccurate observation, resulting in problems such as lamp tube sticking, glue overflow, and silicone not flowing into place after pouring.

[0003] At the same time, the glue filling needle on the glue filling head sometimes has a position deviation, which is difficult to see with the naked eye. The slight deviation may also cause problems such as glue sticking to the lamp tube after glue filling, glue overflow, and silicone not flowing into place. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a positioning fixture for glue pouring on outdoor display screens.

[0005] The utility model is implemented by the following method: a glue filling positioning jig for an outdoor display screen comprises a PCB board with a plurality of screw holes and a jig body; a positioning part is provided on the jig body, the positioning part can be connected to a glue filling needle, the positioning part is used for correcting the glue filling needle, or the positioning part is used for positioning the glue filling position of the glue filling needle; a plurality of ejector pins are provided on the lower end surface of the jig body, the plurality of ejector pins can be inserted into corresponding screw holes of the PCB board, and are used for positioning and aligning the jig with the PCB board, and are used for cooperating with the positioning part to complete the positioning and alignment of the glue filling needle with the PCB board.

[0006] Preferably, the positioning portion is a vertically arranged positioning hole, which is opened downward from the upper surface of the fixture body, and the number of the positioning holes opened on the fixture body corresponds to the number and positions of the glue filling needles on the glue filling head.

[0007] Preferably, the top of the positioning hole is a trumpet-shaped structure that is larger at the top and smaller at the bottom.

[0008] Preferably, the top of the ejector pin is fixed in the positioning hole opposite to the screw hole of the PCB board.

[0009] Preferably, the positioning portion is an arc groove symmetrically arranged on two side surfaces of the jig body, each side surface has one or more arc grooves, the size of the arc groove matches the glue filling needle, and the glue filling needle can be pushed in from the open end of the arc groove on the side surface of the jig body.

[0010] Preferably, a mounting hole is provided on the lower surface of the fixture body, avoiding the arc groove and at a position that can be aligned with the screw hole of the PCB board, and the ejector pin is installed in the mounting hole.

[0011] Preferably, the cross section of the arc-shaped groove is U-shaped, and the opening end of the arc-shaped groove expands toward both sides.

[0012] Preferably, the fixture body is a rectangular parallelepiped.

[0013] The beneficial effects of the utility model are as follows: the utility model provides a positioning fixture for glue filling of outdoor display screens. Compared with the prior art, the utility model has at least the following technical effects: 1. A positioning part is provided on the fixture body, and the positioning part can be connected to the glue filling needle on the glue filling head to achieve correction; the ejector pin that can be inserted into the screw hole of the PCB board and the glue filling needle connected to the positioning part are arranged at the lower end of the fixture body, and the two can cooperate to complete the positioning of the glue filling needle and the PCB board, thereby avoiding the deviation of the position of the glue filling needle relative to the PCB board, so as to ensure the accurate glue filling position, and no human eye observation and positioning is required. 2. A positioning hole is opened on the fixture body, and the hole position of the positioning hole corresponds to the number and position of the glue filling needle on the glue filling head. When maintaining the glue filling head, the glue filling needle is placed according to the hole position on the fixture to achieve the verticality correction of the glue filling needle, and confirm whether the position of the glue filling needle head is offset, so as to avoid the difficulty of the human eye to observe whether the glue filling needle is skewed, and ensure the glue filling effect, so as to avoid the problems of glue sticking, glue overflow, and silicone not flowing in place after the display PCB board is glued. 3. The positioning part is the arc grooves corresponding to the two long sides of the fixture body. The number of arc grooves on each side is not less than one. The position of the arc groove is opened according to the size of different display screen products, which can meet the glue filling process of products of different sizes; the ejector pin on the lower end surface of the fixture body is inserted into the corresponding screw hole on the PCB board (the screw hole is the hole reserved for the lock mask later) to achieve positioning and place it horizontally; the glue filling head is lowered, and the glue filling needle is aligned with the arc groove on the fixture body, that is, the starting and ending positions of the glue filling have been adjusted, and then the glue filling head is raised, the fixture is taken out, and it is completed; the starting and ending points of the glue filling, and the upper and lower positions of the glue filling head can be quickly and accurately positioned, avoiding setting deviations caused by inaccurate observation due to naked eye observation, thereby avoiding problems such as glue sticking to the lamp tube after glue filling, glue overflow, and silicone not flowing in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the existing display screen PCB board.

[0015] Figure 2 It is a cross-sectional schematic diagram of the glue filling state of the glue filling head.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixture body of the first embodiment.

[0017] Figure 4This is a top view of the fixture body of Example 1.

[0018] Figure 5 It is a schematic diagram of the state of the jig calibrating the glue filling needle in the first embodiment.

[0019] Figure 6 It is a schematic diagram of the state where the fixture of the first embodiment is installed on the PCB board.

[0020] Figure 7 It is a schematic cross-sectional view of the fixture of the first embodiment installed on a PCB board.

[0021] Figure 8 2 is another cross-sectional schematic diagram of the fixture of the first embodiment installed on the PCB board.

[0022] Fig. 9 It is a bottom view of the fixture body of the second embodiment.

[0023] Fig.10 It is a rear view of the fixture body of the second embodiment.

[0024] Fig.11 It is a schematic diagram of the two fixture bodies of the second embodiment installed on the rear side of the PCB board for setting the end point and the starting point of the glue injection.

[0025] Fig.12 It is a schematic diagram of the two fixture bodies of the second embodiment installed on the front side of the PCB board for setting the end point and the starting point of the glue injection.

[0026] Fig.13 It is a schematic diagram of a cross-sectional state of the connection between the fixture body and the PCB board for setting the glue filling starting point of the second embodiment.

[0027] Fig.14 yes Fig.12 A local enlarged schematic diagram of the .

[0028] Fig.15 This is another cross-sectional view of the two fixture bodies of the second embodiment installed on the front side of the PCB board for setting the end point and the starting point of the glue injection.

[0029] Explanation of the figure numbers: 1. PCB board; 11. Screw hole; 2. Fixture body; 21. Positioning hole; 22. Arc groove; 3. Glue filling needle; 4. Ejector pin; 5. Lamp tube. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Embodiment 1

[0032] See also Figures 3 to 9A glue filling and positioning jig for outdoor display screens, comprising a PCB board 1 with a plurality of screw holes 11, and a jig body 2; a positioning portion is provided on the jig body 2, the positioning portion can be connected to a glue filling needle 3, the positioning portion is used to calibrate the glue filling needle 3, or the positioning portion is used to locate the glue filling position of the glue filling needle 3; a plurality of ejector pins 4 are provided on the lower end surface of the jig body 2, the plurality of ejector pins 4 can be inserted into the corresponding screw holes 11 of the PCB board 1, and are used to position and align the jig with the PCB board 1, and are used to cooperate with the positioning portion to complete the positioning and alignment of the glue filling needle 3 with the PCB board 1. A positioning part is provided on the jig body 2, and the positioning part is connected to the glue filling needle 3 on the glue filling head to achieve correction; the ejector pin 4 which can be inserted into the screw hole 11 of the PCB board 1 and is arranged at the lower end of the jig body 2, and the glue filling needle 3 which is connected to the positioning part, can cooperate with each other to complete the positioning of the glue filling needle 3 and the PCB board 1, thereby avoiding the deviation of the position of the glue filling needle 3 relative to the PCB board 1, so as to ensure the accuracy of the glue filling position, and no human eye observation is required for positioning.

[0033] See also Figures 3 to 9 Preferably, the positioning portion is a vertically arranged positioning hole 21, and the positioning hole 21 is opened downward from the upper surface of the jig body 2. The number of the positioning holes 21 opened on the jig body 2 corresponds to the number and position of the glue needles 3 on the glue filling head. The hole positions of the positioning holes 21 correspond to the number and position of the glue filling needles 3 on the glue filling head. When maintaining the glue filling head, the glue filling needles 3 are aligned and placed according to the positioning holes 21 on the jig. When the glue filling head is deflected or the glue filling needle 3 cannot be fully inserted into the positioning hole 21 under normal force, it means that the glue filling needle 3 is skewed. At this time, a greater force is applied to fully press the glue filling needle 3, so as to correct the verticality of the glue filling needle 3 head, and confirm whether the position of the glue filling needle 3 head is offset and screen it out, so as to ensure the glue filling effect to avoid problems such as glue sticking to the lamp tube, glue overflow, and silicone not flowing in place after the display PCB board 1 is glued.

[0034] See also Figures 3 to 9 Preferably, the top of the positioning hole 21 is a trumpet-shaped structure with a larger top and a smaller bottom, so that the alignment of the glue injection needle 3 and the positioning hole 21 is easier.

[0035] See also Figures 3 to 9 Preferably, the top of the ejector pin 4 is fixed in the positioning hole 21 opposite to the screw hole 11 of the PCB board 1. No additional holes are required, which can reduce the production cost of the fixture.

[0036] See also Figures 3 to 9 Preferably, the ejector pins 4 are provided with three to four. Preferably, four ejector pins are provided, so that the fixture body 2 and the PCB board 1 of the display screen are fixed together more stably. The fixture body 2 is a rectangular parallelepiped.

[0037] This embodiment has the following working principle:

[0038] First, insert the four ejector pins 4 into the corresponding screw holes 11 on the PCB board 1 (the screw holes 11 are reserved for locking the mask later) to achieve positioning. At this time, the jig body 2 is facing the left or right side of the PCB board 1;

[0039] Secondly, lower the glue filling head, insert the glue filling needle 3 into the positioning hole 21 on the jig and align it (if the glue filling needle 3 cannot be fully inserted in this process, it means that the position of the glue filling needle 3 is offset or tilted, and the deviation can be adjusted in time; if the glue filling needle 3 cannot be inserted into the positioning hole 21 at all, it means that it is offset, and it can be screened out and wait for subsequent repair by other means); the glue filling needle 3 is fully aligned, that is, the relative position of the glue filling needle 3 and the PCB board 1 has been adjusted (ensuring that the glue filling needle 3 is located above the gap between two adjacent lamp tubes on the PCB board 1, so as to avoid the lamp tubes from sticking), so that the glue filling needle is in the gap between two adjacent lamp tubes 5 in the front and rear direction, and then lift the glue filling head to take out the jig, and then you can start glue filling, which can avoid the problems of lamp tube sticking, glue overflow, and silicone not flowing into place after glue filling.

[0040] Embodiment 2

[0041] See also Figures 9 to 15 The difference between this embodiment and the first embodiment is that the positioning portion is symmetrically provided with one or more arc grooves 22 on the sides where the two long sides of the fixture body 2 are located, and the size of the arc groove 22 matches the glue injection needle 3, and the glue injection needle 3 can be pushed in from the open end of the arc groove 22 on the side of the fixture body 2. The arc grooves 22 are symmetrically arranged on both sides, so that the fixture can be shared in the left and right positions and the upper and lower positions of the module.

[0042] See also Figures 9 to 15 Preferably, the lower surface of the fixture body 2 avoids the arc groove 22 and is provided with a mounting hole at a position that can be aligned with the screw hole 11 of the PCB board 1, and the ejector pin 4 is installed in the mounting hole. This facilitates the installation of the ejector pin 4.

[0043] See also Figures 9 to 15 Preferably, the cross section of the arc groove 22 is U-shaped, and the opening end of the arc groove 22 expands to both sides. It is convenient for the glue filling needle 3 of the glue filling head to penetrate into the arc groove 22 and align with the arc groove 22. It can be installed on one side of the PCB board 1 to avoid blocking the glue filling needle 3.

[0044] The utility model has the following working principle:

[0045] First, insert the plurality of ejector pins 4 of the fixture body 2 into the corresponding screw holes 11 on the left side of the front PCB board 1 (the screw holes 11 are reserved for locking the mask later) to achieve positioning, and place it horizontally. At this time, the arc groove 22 on the side of the fixture coincides with the starting position of the glue injection;

[0046] Then, lower the glue filling head and move the glue filling head so that the glue filling needle 3 close to the side of the fixture is aligned with the arc groove 22 on the fixture body 2, and the setting of the glue filling starting point position is completed. Then, raise the glue filling head and take out the fixture body 2;

[0047] Then, the jig body 2 is turned in the opposite direction, and the ejector pin 4 on the jig body 2 is inserted into the screw hole 11 on the right front side of the PCB board 1 to achieve horizontal positioning. At this time, the arc groove 22 on the side of the jig coincides with the end point of the glue injection.

[0048] After that, lower the glue filling head and move the glue filling head so that the glue filling needle 3 near the side of the fixture is aligned with the arc groove 22 on the fixture body 2, and the setting of the glue filling end position is completed. Then raise the glue filling head and take out the fixture body 2; the glue filling process can be started, making the alignment of the glue filling needle 3 and the PCB board 1 simple and clear, avoiding the deviation set by the naked eye. Of course, the starting position and the end position can also be swapped, and two fixture bodies 2 can be used for the end point setting and the starting point setting respectively, which can be adjusted as needed, and the fixture body can also be installed on the back side of the PCB board.

[0049] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0050] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0051] Finally, the above is only a preferred implementation of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0052] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the utility model should also be regarded as within the protection scope of the utility model.

Claims

1. A positioning fixture for glue filling of outdoor display screens, comprising a PCB board with a plurality of screw holes, characterized in that: It also includes a jig body; a positioning portion is provided on the jig body, the positioning portion can be connected to the glue filling needle, the positioning portion is used to calibrate the glue filling needle, or the positioning portion is used to locate the glue filling position of the glue filling needle; a plurality of ejector pins are provided on the lower end surface of the jig body, and the plurality of ejector pins can be inserted into the corresponding screw holes of the PCB board, and are used to position and align the jig with the PCB board, and are used to cooperate with the positioning portion to complete the positioning and alignment of the glue filling needle and the PCB board.

2. The glue pouring and positioning jig for outdoor display screens according to claim 1, characterized in that: The positioning portion is a vertically arranged positioning hole, which is opened downward from the upper surface of the fixture body. The number of the positioning holes opened on the fixture body corresponds to the number and positions of the glue injection needles on the glue injection head.

3. The positioning fixture for glue pouring for outdoor display screens according to claim 2, characterized in that: The top of the positioning hole is in a trumpet-shaped structure that is larger at the top and smaller at the bottom.

4. The glue pouring and positioning jig for outdoor display screen according to claim 2 is characterized by: The top of the ejector pin is fixed in the positioning hole opposite to the screw hole of the PCB board.

5. The glue pouring and positioning jig for outdoor display screen according to claim 1 is characterized by: The positioning portion is an arc groove symmetrically arranged on the two side surfaces of the jig body, and each side surface has one or more arc grooves. The size of the arc groove matches the glue filling needle, and the glue filling needle can be pushed in from the open end of the arc groove on the side surface of the jig body.

6. The glue pouring and positioning jig for outdoor display screens according to claim 5 is characterized by: The lower surface of the fixture body avoids the arc groove and is provided with a mounting hole at a position that can be aligned with the screw hole of the PCB board, and the ejector pin is installed in the mounting hole.

7. The glue pouring and positioning jig for outdoor display screens according to claim 5 is characterized by: The cross section of the arc-shaped groove is U-shaped, and the opening end of the arc-shaped groove expands toward both sides.

8. The glue pouring and positioning jig for outdoor display screen according to claim 5, characterized in that: The fixture body is in the shape of a rectangular parallelepiped.

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