A screen printing plate for circuit board
The specific structure of the inner and outer frames is designed on the screen printed on the circuit board, including frame-shaped grooves, rail rods, card blocks and card slots, which solves the problem of easy reversal of the screen board and improves the reliability of the installation.
Patent Information
- Application Number
- CN202421634591.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-11
AI Technical Summary
When installing screen printed on existing circuit boards, the screen plates are easily reversal due to operator errors, resulting in the printed solder resist paint pattern being reversed and cannot correspond to the lines and solder joints on the circuit board, resulting in low reliability.
A mesh board including an inner mesh board and an outer frame is designed. The edge part of the inner mesh board is equipped with a frame-like groove. The upper and lower sides of the frame-like groove are provided with rail rods. Each end of each guide rod is provided with a baffle and a slider. One side of the slider is provided with a card block, one side of the inner mesh board is provided with a card slot corresponding to the card block, and a pushing assembly is provided on the guide rod. Through these structures, ensure that the card slots and the card blocks are aligned during installation, and avoiding the screen plate being reversal.
Through this design, when placing the outer frame, the operator simply aims the card block at the card slot to ensure that the outer frame is placed in a forward direction. If placed in reverse, the card block on one side of the outer frame will be stuck by the edge of the inner mesh board and cannot be placed in, so that the mesh board can be placed in reverse and adjusted, improving the reliability of the placement.
Smart Images
Figure CN222727636U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a screen plate for screen printing of a circuit board. Background Art
[0002] In the process of circuit board processing, screen printing is a necessary process in the solder mask stage. It prints the solder mask with a certain pattern on the surface of the circuit board, thereby covering and protecting the circuits of the circuit board, while all the solder joints are exposed separately. When screen printing, attention should be paid to the direction of the screen to avoid the screen being placed upside down, which will cause the solder mask pattern printed on the circuit board to be reversed and unable to correspond to the circuits and solder joints on the circuit board. When many existing screen-printed screens for circuit boards are placed, the operator usually compares the screen pattern on the screen to distinguish the front and back, but this method is prone to reverse placement of the screen due to operator errors and has general reliability. Therefore, it is necessary to develop a screen-printed screen for circuit boards to solve the above problems. Utility Model Content
[0003] The purpose of the utility model is to provide a screen plate for screen printing of a circuit board to solve the problems raised in the above-mentioned background technology.
[0004] In order to solve the above problems, the utility model adopts the following technical solutions:
[0005] A screen plate for screen printing of circuit boards, comprising an inner screen plate and an outer frame, wherein the inner screen plate is arranged on the inner side of the outer frame, a screen cloth is arranged in the middle part of the inner screen plate, a frame-shaped groove is arranged at the edge part of the inner screen plate, guide rods are arranged on the upper and lower sides of the frame-shaped groove, baffles are arranged at both ends of each guide rod, the baffles are fixed in the frame-shaped groove, the guide rod is fixed between the two baffles, two slide plates are slidably arranged between the two guide rods, the two slide plates are respectively arranged on the left and right sides of the inner screen plate, a clamping block is arranged on one side of the two slide plates, a clamping groove corresponding to the clamping block is arranged on one side of the inner screen plate, and a pushing component is arranged on the two guide rods.
[0006] Preferably, the pushing assembly comprises a push plate, the push plate is slidably arranged on the guide rail rod, two locking bolts are arranged on the push plate, and the locking bolts abut against the guide rail rod.
[0007] Preferably, the guide rail rod is made of rubber, and the locking bolt is made of plastic.
[0008] Preferably, a spring is provided between the slide plate and the baffle plate, and the spring between the baffle plate and the slide plate is arranged on the guide rail rod.
[0009] Preferably, threaded holes are provided at the four corners of the outer frame.
[0010] The beneficial effect of the utility model is that when using the utility model, it is only necessary to make the card slot and the card block exposed from the frame-shaped slot in the positive direction of screen printing during installation. After that, each time the outer frame is placed, it is only necessary to align the card block exposed from the frame-shaped slot with the card slot to ensure that the outer frame is placed in the positive direction. If the operator puts the outer frame upside down, the card block exposed on one side of the outer frame will be stuck by the edge of the inner screen plate, making it impossible for the outer frame to be placed in the inner screen plate, so that the operator can quickly find that the screen plate is placed upside down and make adjustments. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below, but this does not limit the protection scope of the utility model.
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the inner mesh plate;
[0014] Figure 3 For this utility model Figure 2 Schematic diagram of the structure of the push component.
[0015] In the figure: 11, inner mesh plate; 12, outer frame; 13, wire mesh cloth; 14, slot; 15, block; 16, frame-shaped slot; 17, baffle; 18, slide plate; 19, guide rod; 20, push assembly; 21, push plate; 22, locking bolt. DETAILED DESCRIPTION
[0016] See also Figures 1 to 3 A screen printing screen for a circuit board shown in the figure comprises an inner screen 11 and an outer frame 12, wherein the inner screen 11 is arranged on the inner side of the outer frame 12, a screen cloth 13 is arranged in the middle part of the inner screen 11, a frame-shaped groove 16 is arranged at the edge part of the inner screen 11, guide rods 19 are arranged on the upper and lower sides of the frame-shaped groove 16, baffles 17 are arranged at both ends of each guide rod 19, the baffles 17 are fixed in the frame-shaped groove 16, the guide rod 19 is fixed between the two baffles 17, two slide plates 18 are slidably arranged between the two guide rods 19, the two slide plates 18 are respectively arranged on the left and right sides of the inner screen 11, a block 15 is arranged on one side of the two slide plates 18, a slot 14 corresponding to the block 15 is arranged on one side of the inner screen 11, and a pushing assembly 20 is arranged on the two guide rods 19.
[0017] Furthermore, the pushing assembly 20 includes a push plate 21, which is slidably set on the guide rod 19. Two locking bolts 22 are provided on the push plate 21, and the locking bolts 22 abut against the guide rod 19; by loosening the pushing assembly 20 and pushing the pushing assembly 20 to one side, the slide plate 18 on one side can be moved, so that the block 15 on this side is exposed from the frame-shaped groove 16, and the locking bolts 22 are tightened, and the friction between the locking bolts 22 and the guide rod 19 can be used to lock the pushing assembly 20 on the guide rod 19.
[0018] Furthermore, the guide rod 19 is made of rubber, and the locking bolt 22 is made of plastic; the friction between the guide rod 19 made of rubber and the locking bolt 22 made of plastic is large, ensuring that when the locking bolt 22 is tightened, the push plate 21 can be stably locked, and the locking bolt 22 made of plastic has good plasticity, which is convenient for processing threads.
[0019] Furthermore, a spring is provided between the slide plate 18 and the baffle plate 17, and the spring between the baffle plate 17 and the slide plate 18 is provided on the guide rail rod 19; when the pushing assembly 20 and the slide plate 18 on one side change from being squeezed to being separated, the slide plate 18 on that side will be pushed by the originally compressed spring, so that the originally exposed block 15 is retracted into the frame-shaped groove 16.
[0020] Furthermore, threaded holes are provided at the four corners of the outer frame 12; the outer frame 12 can be fixedly mounted on the screen printing machine by means of bolts.
[0021] The working principle of the utility model is that in the initial state, the inner screen plate 11 is separated from the outer frame 12, and the outer frame 12 is fixed to the screen printing machine by bolts, so that the card slot 14 is located in the positive direction of the screen printing, and then the screen printing pattern is set on the screen cloth 13, the positive direction of the pattern is determined, and then the locking bolt 22 is loosened, and the push plate 21 is slid toward the positive direction of the pattern, so that the slide plate 18 on one side moves toward the positive direction of the pattern, so that the corresponding card block 15 is exposed from the frame-shaped groove 16, and the side where the card block 15 is exposed represents the positive direction of the pattern, and the card block 15 on the other side is in Under the action of the spring, it is received in the frame-shaped groove 16, and then the locking bolt 22 is tightened to fix the pushing assembly 20 on the guide rod 19. After that, when the operator places the outer frame 12 on the screen printing machine, it only needs to align the block 15 exposed on one side of the outer frame 12 with the slot 14 on the inner screen plate 11 to ensure that the outer frame 12 is placed in the forward direction. If the outer frame 12 is placed upside down, the block 15 exposed on one side of the outer frame 12 will be stuck by the edge of the inner screen plate 11, making it impossible for the outer frame 12 to be placed in the inner screen plate 11, so that the operator can quickly find that the screen plate is placed upside down and make adjustments.
[0022] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.
Claims
1. A screen plate for screen printing of circuit boards, characterized in that: It includes an inner mesh plate and an outer frame, the inner mesh plate is arranged on the inner side of the outer frame, the middle part of the inner mesh plate is provided with a wire mesh cloth, the edge part of the inner mesh plate is provided with a frame-shaped groove, the upper and lower sides of the frame-shaped groove are provided with guide rods, both ends of each guide rod are provided with baffles, the baffles are fixed in the frame-shaped groove, the guide rod is fixed between the two baffles, two slides are slidably arranged between the two guide rods, the two slides are respectively arranged on the left and right sides of the inner mesh plate, one side of the two slides is provided with a card block, one side of the inner mesh plate is provided with a card slot corresponding to the card block, and the two guide rods are provided with a pushing component.
2. A screen printing screen for a circuit board according to claim 1, characterized in that: The pushing assembly comprises a pushing plate, which is slidably arranged on the guide rail rod. Two locking bolts are arranged on the pushing plate, and the locking bolts abut against the guide rail rod.
3. A screen printing screen for a circuit board according to claim 2, characterized in that: The guide rail rod is made of rubber and the locking bolt is made of plastic.
4. A screen printing screen for a circuit board according to claim 2, characterized in that: A spring is arranged between the slide plate and the baffle plate, and the spring between the baffle plate and the slide plate is arranged on the guide rail rod.
5. The screen printing screen for circuit board according to claim 1, characterized in that: Threaded holes are arranged at the four corners of the outer frame.