Adjustable patch rack

Abstract

The utility model provides an adjustable surface mount material rack, which comprises a rectangular frame body integrally enclosed by an L-shaped frame, the frame comprises a bottom edge and a side edge positioned at the outer edge of the bottom edge, and the adjustable surface mount material rack further comprises a strip-shaped movable seat, the two ends of the movable seat in the length direction are erected between the two long frames of the rectangular frame body and divide the rectangular frame body into small rectangular frames, supporting plates are arranged at the bottoms of the two sides of the movable seat in the width direction, and a circuit board to be subjected to surface mounting is flatly placed on the bottom edge and the supporting plates; a plurality of edge adjusting stop blocks are detachably arranged on the bottom edge at intervals, and gaps are reserved between the edge adjusting stop blocks and the inner side edge of the bottom edge. The whole material rack is not provided with screws, screw holes and other movable parts which are easily fixed by welding flux, and the structure is simple and reliable; the adjustable patch rack is made of synthetic stone and is not easy to deform and discolor in a high-temperature environment, the thermal conductivity of the synthetic stone is poorer than that of metal, and the edge of a circuit board is not warped due to rapid temperature rise; in addition, the edge adjusting stop block can be installed in different hole position combinations so as to be suitable for circuit boards with different edge distances.

Description

Technical Field

[0001] The utility model relates to the technical field of printed circuit board assembly, in particular to an adjustable patch material rack. Background Art

[0002] Wave soldering is a common process in PCBA. The specific process is to pre-coat flux on the printed circuit board with components inserted, then send the circuit board into the wave soldering machine via a conveyor belt, and remove the excess plug-in pins after the components are soldered.

[0003] The patch rack is a carrier for circuit boards. Usually, a patch rack will load at least one circuit board and enter the wave soldering machine along the conveyor belt. However, the circuit boards of various products will be different. In terms of appearance, they are mainly reflected in different shapes and sizes, different circuit board margins (the width of the circuit-free part of the edge of the circuit board), and different circuit board thicknesses. This requires the patch racks to be specially customized for each type of circuit board. In addition, some patch manufacturers use patch racks designed with adjustable patch racks, but this adjustable patch rack has a frame that carries the circuit board. The edge of the circuit board is mounted on the frame, and the soldering position at the bottom of the circuit board is exposed. The frame is provided with a rod that can slide horizontally. By moving the rod, it can be adjusted according to the shape of the circuit board so that the circuit board can be placed flat on the frame and the rod. However, the rod needs to be fixed with screws after adjustment. Under the action of high temperature, solder and flux, it is easy to block the screw hole, making it impossible to remove the screw, so that the rod is fixed and can no longer be moved and adjusted. Utility Model Content

[0004] In view of the defects of the background technology, the utility model proposes an adjustable chip rack, the window size of which can be adjusted by a movable seat to load circuit boards of different shapes. The adjustable chip rack as a whole has no screws, screw holes or other movable parts that can be easily fixed by solder, and has a simple and reliable structure and strong durability.

[0005] The adjustable patch material rack proposed in the utility model comprises a rectangular frame body surrounded by an L-shaped frame, the frame comprises a bottom side and a side located at the outer edge of the bottom side, the adjustable patch material rack further comprises a long strip-shaped movable seat, the two ends of the movable seat in the long direction are arranged between the two long frames of the rectangular frame body and the rectangular frame body is divided into small rectangular frames, and the bottom of the two sides of the movable seat in the width direction are provided with a support plate, and the circuit board to be patched is placed flat on the bottom side and the support plate;

[0006] A plurality of edge adjustment blocks are arranged at detachable intervals on the bottom edge, and intervals are left between the edge adjustment blocks and the inner edges of the bottom edge.

[0007] Preferably, three pins are provided at the bottom of the edge adjustment block, and multiple groups of blind holes for plugging in the pins are arranged at intervals along the bottom edge, each group of blind holes includes at least two hole position combinations, and when the edge adjustment block is inserted into different hole position combinations, the distance between it and the inner edge of the bottom edge changes accordingly.

[0008] Preferably, the edge adjustment block is in the shape of a triangular prism.

[0009] Preferably, the edge adjustment block comprises a first edge adjustment block with a convex edge and a second edge adjustment block without a convex edge, the first edge adjustment block is installed on two wide frames of the rectangular frame, and the second edge adjustment block is installed on two long frames of the rectangular frame.

[0010] Preferably, each side surface of the first edge adjustment stopper is provided with a convex edge, and the bottom heights of the convex edges on each side are different.

[0011] Preferably, a detachable pressing plate is provided on the wide frame of the rectangular frame, and the pressing plate is pressed on the top of the first edge adjustment stopper.

[0012] Preferably, a hanging groove for hanging the side edge is provided on the outer side of the pressing plate.

[0013] Preferably, the movable seat is further provided with a vertically extending positioning column on the side where the supporting plate is provided, and the circuit board is provided with a positioning groove corresponding to the positioning column on a side close to the movable seat.

[0014] Preferably, limiting grooves are provided at the bottom of both ends of the movable seat in the long direction, and racks are provided on the top walls of the limiting grooves. During installation, the side edges of the long frames of the rectangular frame are embedded in the limiting grooves, and the top edges of the side edges of the long frames of the rectangular frame are provided with a toothed edge that matches the rack.

[0015] Preferably, the rectangular frame, the movable seat, the pressing plate and the edge adjustment block are all made of stone.

[0016] The beneficial effects of the utility model include: the adjustable patch material rack as a whole has no screws and screw holes or other movable parts that are easily fixed by solder, and the structure is simple and reliable; the adjustable patch material rack is made of synthetic stone, which is not easy to deform or discolor in a high temperature environment. The thermal conductivity of synthetic stone is worse than that of metal, and the edge of the circuit board will not warp due to rapid temperature rise; the edge adjustment block can be installed in different hole position combinations to suit circuit boards with different margins. In addition, the first edge adjustment block can select a direction according to the thickness of different circuit boards, and select convex edges of different heights to press the circuit board tightly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is described in detail below with reference to the embodiments and drawings, wherein:

[0018] Figure 1 It is a three-dimensional schematic diagram of the adjustable patch material rack of the utility model.

[0019] Figure 2 It is a schematic diagram of the structure explosion of the adjustable patch material rack of the utility model.

[0020] Figure 3 It is a bottom view of the movable seat in the utility model.

[0021] Figure 4 It is a structural schematic diagram of the first edge adjustment block in the utility model.

[0022] Figure 5 It is a structural schematic diagram of the second edge adjustment block in the utility model.

[0023] Reference numerals:

[0024] 11-bottom edge, 12-side edge, 13-window, 14-blind hole, 15-tooth edge, 2-movable seat, 21-support plate, 22-limiting groove, 23-rack, 24-positioning column, 3-circuit board, 31-positioning groove, 41-first edge adjustment block, 42-second edge adjustment block, 43-pin, 44-convex edge, 5-pressing plate, 51-hanging groove. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0027] The principle of the present utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0028] The utility model proposes an adjustable patch material rack, such as Figure 1-5 As shown, it includes a rectangular frame body surrounded by an L-shaped frame, the frame includes a bottom edge 11 and a side edge 12 located at the outer edge of the bottom edge 11, and the adjustable patch material rack also includes a long strip-shaped movable seat 2, the two ends of the movable seat 2 in the long direction are mounted between the two long frames of the rectangular frame body and divide the rectangular frame body into small rectangular frames, and the bottom of both sides of the movable seat 2 in the width direction are provided with a support plate 21, and the circuit board 3 to be patched is placed flat on the bottom edge 11 and the support plate 21;

[0029] A plurality of edge adjustment blocks are detachably provided at intervals on the bottom edge 11 , and an interval is left between the edge adjustment blocks and the inner edge of the bottom edge 11 .

[0030] The circuit board 3 to be put into the wave soldering machine is placed on the bottom edge 11 of the rectangular frame, and the side edge 12 is used to limit the lateral movement of the circuit board 3. Components are inserted on the top of the circuit board 3, and the soldering feet of the components pass through the circuit board 3 and are exposed on the bottom surface of the circuit board 3. The area to be soldered on the bottom surface of the circuit board 3 is located in the window 13 of the rectangular frame. The movable seat 2 is used to adjust the size of the window 13 to be suitable for circuit boards 3 of different shapes. Some products have high requirements on the area size of the circuit board 3. These circuit boards 3 are often designed with very dense circuits and the margins of the circuit board 3 are designed to be very narrow. For such narrow-margin circuit boards 3, edge adjustment blocks are required to prevent the area to be soldered of the circuit board 3 from being covered by the bottom edge 11 of the frame. In addition, the present embodiment as a whole does not have screws, screw holes, and other movable parts that are easily fixed by solder. The structure is simple and reliable, and there will be no situation where the connector is soldered or corroded.

[0031] In this embodiment, two movable seats 2 are provided to divide the rectangular frame into two left and right windows 13, and the adjustable patch rack can load two circuit boards 3 at a time.

[0032] In this embodiment, three pins 43 are provided at the bottom of the edge adjustment block, and multiple groups of blind holes 14 for plugging the pins 43 are provided at intervals along the bottom edge 11. Each group of blind holes 14 has 5 blind holes 14, forming two hole position combinations. One blind hole 14 belongs to both hole position combinations at the same time, so that one hole can be reduced. When the edge adjustment block is inserted into different hole position combinations, the distance from the inner edge of the bottom edge 11 close to the window 13 is also different, so that it can be applied to circuit boards 3 with two different margins. If the margin of the circuit board 3 is greater than the width of the bottom edge 11, the edge adjustment block may not be used. The edge adjustment block is in the shape of a triangular prism, and one side of the triangular prism must face the circuit board 3 to increase the contact area with the circuit board 3.

[0033] In this embodiment, the edge adjustment block includes a first edge adjustment block 41 with a convex edge 44 and a second edge adjustment block 42 without a convex edge 44. The first edge adjustment block 41 is installed on two wide frames of the rectangular frame, and the second edge adjustment block is installed on two long frames of the rectangular frame. A convex edge 44 is provided on each side of the first edge adjustment block 41, and the bottom heights of the convex edges 44 on each side are different. The circuit board 3 has a single-layer board and a multi-layer board, but in actual production, the single-layer board is the most common, and the more layers, the less it is used. The spacing between the three convex edges 44 on the side of the first edge adjustment block 41 and the bottom edge 11 corresponds to a single-layer board, a double-layer board and a triple-layer board, respectively. The convex edges 44 can press the circuit board 3 to prevent the circuit board 3 from being displaced during the movement and welding process with the conveyor belt, thereby affecting the final welding effect.

[0034] To further ensure that the circuit board 3 does not move, a detachable pressing plate 5 is provided on the wide frame of the rectangular frame, and the pressing plate 5 is pressed on the top of the first edge adjustment block 41 to fix the circuit board 3 by gravity. The two ends of the pressing plate 5 in the long direction abut against the inner sides of the two long frames of the rectangular frame, and the outer side of the pressing plate 5 away from the circuit board 3 is also provided with a hanging groove 51 for hanging the side edge 12 of the rectangular frame to fix the pressing plate 5.

[0035] In this embodiment, the bottom of both ends of the movable seat 2 in the long direction is provided with a limit groove 22, and the top wall of the limit groove 22 is provided with a rack 23. When installed, the side 12 of the long side frame of the rectangular frame is embedded in the limit groove 22, and the top of the side 12 of the long side frame of the rectangular frame is provided with a toothed edge 15 that matches the rack 23. When adjusting the position of the movable seat 2, the movable seat 2 is lifted up and moved to a suitable position and then put down. The rack 23 and the toothed edge 15 cooperate with each other to limit the displacement of the movable seat 2 along the long direction of the rectangular frame, and the limit groove 22 will limit the displacement of the movable seat 2 along the width direction of the rectangular frame.

[0036] In this embodiment, the movable seat 2 is further provided with a vertically extending positioning column 24 on the side where the supporting plate 21 is provided, and the circuit board 3 is provided with a positioning groove 31 corresponding to the positioning column 24 on a side close to the movable seat 2 .

[0037] When placing the circuit board 3, first install the adjustment block and the movable seat 2, and then install the pressure plate 5 to fix the adjustment block; insert one side of the circuit board 3 into the gap between the convex edge 44 of the first adjustment block and the bottom edge 11 of the rectangular frame, and then use your fingers to lift the side of the circuit board 3 close to the movable seat 2 and slowly put it down until the bottom of the circuit board 3 fits with the bottom edge 11 and the support plate 21 of the movable seat 2, and the positioning column 24 of the movable seat 2 is buckled into the positioning groove 31 of the circuit board 3.

[0038] In this embodiment, the rectangular frame, the movable seat 2, the pressing plate 5 and the edge adjustment block are all made of artificial synthetic stone. Synthetic stone has the characteristics of high temperature resistance, poor deformation ability and poor thermal conductivity. It will not be deformed by high temperature in the wave soldering machine, and will not cause the edge of the circuit board 3 to heat up or cool down quickly due to thermal conductivity problems, resulting in deformation and warping. In addition, the stone synthetic stone can be made into dark gray, which will not have the oxidation discoloration problem of metal products, and the texture is also better.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable patch rack, comprising a rectangular frame integrally surrounded by an L-shaped frame, wherein the frame comprises a bottom edge and a side edge located at the outer edge of the bottom edge, characterized in that: The adjustable patch material rack also includes a long strip movable seat, the two ends of the movable seat in the long direction are mounted between the two long sides of the rectangular frame and divide the rectangular frame into small rectangular frames, and the bottom of the two sides of the movable seat in the width direction are provided with a support plate, and the circuit board to be patched is placed flat on the bottom edge and the support plate; A plurality of edge adjustment blocks are detachably arranged at intervals on the bottom edge, and an interval is left between the edge adjustment blocks and the inner edge of the bottom edge.

2. The adjustable patch rack according to claim 1, characterized in that: Three pins are provided at the bottom of the edge adjustment block, and multiple groups of blind holes for plugging the pins are arranged at intervals along the bottom edge. Each group of blind holes includes at least two hole position combinations. When the edge adjustment block is inserted into different hole position combinations, the distance between it and the inner edge of the bottom edge changes accordingly.

3. The adjustable patch rack according to claim 2, characterized in that: The edge adjustment block is in the shape of a triangular prism.

4. The adjustable patch rack according to claim 3, characterized in that: The edge adjustment block comprises a first edge adjustment block with a convex edge and a second edge adjustment block without a convex edge. The first edge adjustment block is installed on two wide frames of the rectangular frame, and the second edge adjustment block is installed on two long frames of the rectangular frame.

5. The adjustable patch rack according to claim 4, characterized in that: Each side surface of the first edge adjustment stopper is provided with a convex edge, and the bottom heights of the convex edges on each side are different.

6. The adjustable patch rack according to claim 5, characterized in that: A detachable pressing plate is provided on the wide frame of the rectangular frame, and the pressing plate is pressed on the top of the first edge adjustment stopper.

7. The adjustable patch rack according to claim 6, characterized in that: The outer side of the pressing plate is provided with a hanging groove for hanging the side edge.

8. The adjustable patch rack according to claim 7, characterized in that: The movable seat is also provided with a vertically extending positioning column on the side where the supporting plate is provided, and the circuit board is provided with a positioning groove corresponding to the positioning column on a side close to the movable seat.

9. The adjustable patch rack according to claim 8, characterized in that: Limiting grooves are provided at the bottom of both ends of the movable seat in the long direction, and racks are provided on the top walls of the limiting grooves. During installation, the side edges of the long frames of the rectangular frame are embedded in the limiting grooves, and a toothed edge matching the racks is provided at the top of the side edges of the long frames of the rectangular frame.

10. The adjustable patch rack according to claim 9, characterized in that: The rectangular frame, the movable seat, the pressing plate and the edge adjustment block are all made of stone.

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