Welding carrier

Abstract

The utility model provides a welding carrier which comprises a base and a pressing assembly, a containing groove and a through hole are formed in the base, and the through hole penetrates through the base from the groove bottom of the containing groove. The pressing assembly comprises a pressing plate, a flexible pressing block and a plurality of elastic pressing columns, the pressing plate is hinged to the base, the elastic pressing columns and the flexible pressing block are arranged on the pressing plate, when the pressing plate is overturned to the position above the base, the flexible pressing block and the elastic pressing columns are arranged corresponding to the containing groove, and the elastic pressing columns are distributed in the whole containing groove; according to the utility model, thermal deformation of the PCB and element floating can be corrected.

Description

Technical Field

[0001] The utility model relates to the technical field of wave soldering, in particular to a soldering carrier suitable for wave soldering. Background Art

[0002] Wave soldering is to make the soldering surface of the PCB board directly contact with high-temperature liquid tin to achieve the purpose of soldering. The high-temperature liquid tin maintains an inclined surface, and a special device is used to make the tin liquid form a wave-like phenomenon, so it is called "wave soldering". During the wave soldering process, the PCB board is generally placed on a soldering carrier. The existing soldering carrier vibrates on the transport track and during the soldering process, the material will float due to the surge of the tin liquid wave. In addition, due to the large size of the PCB board and the fact that it is a single-sided board, the PCB board will be deformed after the heat expansion after wave soldering, and this type of defect is not easy to detect. Usually, the abnormality is discovered when the customer assembles it, which is prone to customer complaints.

[0003] Therefore, there is an urgent need to provide a welding carrier that can correct the thermal deformation of the PCB board and the floating height of the components. Utility Model Content

[0004] The utility model aims to provide a welding carrier capable of correcting thermal deformation of a PCB board and floating height of components.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a welding carrier, including a base and a pressing assembly, the base is provided with a receiving groove and a through hole, the through hole passes through the base from the bottom of the receiving groove; the pressing assembly includes a pressure plate, a flexible pressure block and a plurality of elastic pressure columns, the pressure plate is hinged on the base, the elastic pressure column and the flexible pressure block are both arranged on the pressure plate, when the pressure plate is flipped over to the top of the base, the flexible pressure block and the elastic pressure column are both arranged corresponding to the receiving groove, and the plurality of elastic pressure columns are distributed in the entire receiving groove.

[0006] It can be seen from the above scheme that by arranging multiple elastic pressure columns distributed in the entire accommodating groove, the entire PCB board placed in the accommodating groove can be conveniently and dispersedly pressed to prevent the PCB board from expanding and deforming due to heat during the wave soldering process; by arranging a flexible pressure block to press the components on the PCB board, the components can be prevented from floating up due to the influence of the wave surge force, which is beneficial to ensuring the quality of the PCB.

[0007] A further solution is that the distance that the elastic pressure column protrudes from the bottom wall of the pressure plate is greater than or equal to the distance that the flexible pressure block protrudes from the bottom wall of the pressure plate.

[0008] It can be seen from the above scheme that the elastic pressure column needs to abut against the surface of the PCB board and requires sufficient length, while the flexible pressure block needs to abut against the components on the PCB board. Since the flexible pressure block itself can elastically expand and contract, its length can be less than or equal to the length of the elastic pressure column.

[0009] A further solution is that the pressing assembly further includes a fixing block, the fixing block is connected to the bottom wall of the pressing plate, and the flexible pressing block is arranged on the fixing block.

[0010] It can be seen from the above scheme that by setting a fixing block, it is convenient to install and fix the flexible pressing block, and the thickness of the flexible pressing block can be reduced, the compression amount of the flexible pressing block can be controlled and the elastic force during compression can be improved, so as to better fix the component.

[0011] A further solution is that the fixed block is made of a high temperature resistant rigid material, and the flexible pressing block is made of a high temperature resistant flexible material, and the flexible pressing block itself can be elastically retractable.

[0012] A further solution is that the number of flexible pressure blocks is set to more than two, the two elastic pressure columns are divided into multiple rows, and each row is arranged corresponding to the accommodating groove, multiple flexible pressure blocks are arranged along a first preset direction of the accommodating groove, and each flexible pressure block extends perpendicular to the first preset direction, and the fixed blocks are arranged one by one with the flexible pressure blocks.

[0013] A further solution is that a positioning column is provided on the base, and the positioning column is arranged in the receiving groove.

[0014] It can be seen from the above solution that the positioning posts are provided to cooperate with the positioning holes on the PCB board.

[0015] A further solution is that a locking assembly is connected between the pressure plate and the base.

[0016] A further solution is that the locking assembly includes a mounting seat, a pin shaft, a fixing buckle, an elastic member and a fixing buckle seat, the middle part of the fixing buckle is connected to the mounting seat through the pin shaft, the elastic member elastically abuts between the first end of the fixing buckle and the mounting seat, the second end of the fixing buckle can rotate around the pin shaft, and the second end of the fixing buckle is detachably connected to the fixing buckle seat; the mounting seat is arranged on the pressure plate, and the fixing buckle seat is arranged on the base, or the mounting seat is arranged on the base, and the fixing buckle seat is arranged on the pressure plate.

[0017] A further solution is that the base is provided with ribs all around, the ribs are provided on the outside of the accommodating groove, and the ribs protrude from the top wall of the base; two avoidance grooves are also provided on the base, the two avoidance grooves are respectively provided on the opposite sides of the accommodating groove, and the avoidance grooves are provided on the inner side of the ribs and are connected to the accommodating groove.

[0018] It can be seen from the above scheme that by providing a retaining edge, it is used to prevent the tin liquid from entering the containing tank from the upper part of the base; by providing an avoidance groove, it is convenient for the staff to put down or pick up the PCB board from the avoidance groove, which has the advantage of convenient operation.

[0019] A further solution is that a plurality of through holes are provided through the pressure plate, the plurality of through holes are arranged along a second preset direction, the second preset direction intersects with the extension direction of the flexible pressure block, a connecting portion is formed between two adjacent through holes, the through holes are arranged corresponding to the accommodating grooves, and the flexible pressure block is straddled on the through holes.

[0020] It can be seen from the above scheme that by setting the through-hole, it is convenient for the staff to insert the components through the through-hole. By setting the connecting part, it is used to cover the holes on the PCB that do not need the plug-in, preventing the staff from inserting the components in reverse, which is conducive to playing a fool-proof function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of an embodiment of the utility model in a non-welding state.

[0022] Figure 2 It is a structural diagram of the embodiment of the utility model in the welding state.

[0023] Figure 3 It is a structural diagram of the base in the embodiment of the utility model.

[0024] Figure 4 It is a structural diagram of the pressing assembly from the first perspective in an embodiment of the utility model.

[0025] Figure 5 It is a structural diagram of the pressing assembly from a second viewing angle in an embodiment of the utility model.

[0026] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0028] See also Figures 1 to 6 , a welding carrier provided in this embodiment includes a base 1 and a pressing assembly 2.

[0029] The base 1 is provided with a receiving groove 11 and a plurality of through holes 12. The receiving groove 11 is recessed in the top wall of the base 1. The shape of the receiving groove 11 matches the shape of the PCB to be soldered. The plurality of through holes 12 are arranged vertically and horizontally on the bottom of the receiving groove 11. The through holes 12 penetrate the base 1 from the bottom of the receiving groove 11, so that the tin liquid can enter from the through holes 12 and contact the bottom surface of the PCB. Generally, the position of the through hole 12 corresponds to the part on the PCB that needs to be soldered.

[0030] In order to ensure the position accuracy of the PCB board when it is placed in the receiving groove 11, two positioning columns 13 are provided on the base 1 in this embodiment. The two positioning columns 13 are respectively arranged at the diagonals of the receiving groove 11, and the positioning columns 13 are arranged in the receiving groove 11 and protrude from the bottom of the receiving groove 11, so as to cooperate and connect with the positioning holes on the PCB board.

[0031] The pressing assembly 2 includes a pressing plate 21, a flexible pressing block 22 and a plurality of elastic pressing columns 23. The first side of the pressing plate 21 is hinged on the first side of the base 1, and the second side of the pressing plate 21 can be flipped up and down around the first side, so that the pressing plate 21 can be superimposed on the top of the base 1. Specifically, a fixed hinge 16 is provided on the first side of the base 1, and the fixed hinge 16 protrudes from the top wall of the base 1; a movable hinge 25 is provided on the first side of the pressing plate 21, and the movable hinge 25 protrudes from the bottom wall of the pressing plate 21. The movable hinge 25 is connected to the fixed hinge 16 through a hinge shaft, so that the pressing plate 21 can be flipped to the top of the base 1, and the pressing plate 21 is arranged parallel to the base 1.

[0032] The elastic pressure column 23 and the flexible pressure block 22 are both arranged on the pressure plate 21 and protrude from the bottom wall of the pressure plate 21. When the pressure plate 21 is turned over to the top of the base 1, the pressure plate 21 is substantially parallel to the base 1, the flexible pressure block 22 and the elastic pressure column 23 are both arranged corresponding to the upper and lower sides of the receiving groove 11, and a plurality of elastic pressure columns 23 are distributed in the entire receiving groove 11, so as to be conveniently and dispersedly pressed on the entire top wall of the PCB board. Specifically, part of the elastic pressure column 23 presses the edge of the PCB board, and the other part of the elastic pressure column 23 presses the middle part of the PCB board. The elastic pressure column 23 can be elastically extended and retracted along its own axial direction. When the elastic pressure column 23 abuts against the PCB board, the elastic pressure column 23 slightly retracts upwards, ensuring that the elastic pressure column 23 always applies a downward elastic force to the PCB board. The elastic force is opposite to the force when the PCB board is deformed by heat, and can limit the deformation of the PCB board. The elastic pressure column 23 includes a fixed portion 231, a telescopic portion 232 and an elastic member 34 (not shown in the figure). The fixed portion 231 is fixedly connected to the pressure plate 21, the telescopic portion 232 is movably connected to the fixed portion 231, and the elastic member 34 is elastically connected between the fixed portion 231 and the telescopic portion 232.

[0033] The flexible pressing block 22 is made of high temperature resistant flexible material, preferably high temperature resistant sponge material, and the flexible pressing block 22 itself can be elastically retracted. The distance that the elastic pressing column 23 protrudes from the bottom wall of the pressing plate 21 is greater than or equal to the distance that the flexible pressing block 22 protrudes from the bottom wall of the pressing plate 21, that is, the end wall of the free end of the elastic pressing column 23 protrudes from the surface of the flexible pressing block 22, so that the elastic pressing column 23 has a sufficient length to ensure that the elastic pressing column 23 can fully contact the PCB board, and the flexible pressing block 22 contacts the vertical plug-in component on the PCB board and presses the vertical plug-in component downward to prevent the vertical plug-in component from floating up during the welding process. The vertical plug-in component can be a micro switch, a buzzer, etc.

[0034] Since the flexible pressing block 22 is relatively soft, in order to increase the pressing force of the flexible pressing block 22 against the plug-in element, the pressing assembly 2 of this embodiment further includes a fixing block 24, which is connected to the bottom wall of the pressing plate 21, and the flexible pressing block 22 is arranged on the fixing block 24. The fixing block 24 is made of a high temperature resistant rigid material.

[0035] Due to the large size of the PCB board, the number of the flexible pressing blocks 22 is set to be more than two. In this embodiment, three flexible pressing blocks 22 are taken as an example, the number of the fixed blocks 24 is equal to the number of the flexible pressing blocks 22, and the fixed blocks 24 are arranged in a one-to-one correspondence with the flexible pressing blocks 22. The three flexible pressing blocks 22 are arranged along the first preset direction of the receiving groove 11, and each flexible pressing block 22 extends perpendicular to the first preset direction. In this embodiment, the three flexible pressing blocks 22 are preferably arranged along the length direction of the receiving groove 11, and each flexible pressing block 22 extends along the width direction of the receiving groove 11.

[0036] In order to ensure that the pressing plate 21 can cover the base 1 stably, a locking assembly 3 is connected between the pressing plate 21 and the base 1 in this embodiment. Specifically:

[0037] The locking assembly 3 includes a mounting seat 31, a pin 32, a fixing buckle 33, an elastic member 34 and a fixing buckle seat 35. The mounting seat 31 is provided with a groove 311; an ear seat 331 is provided in the middle of the fixing buckle 33, and the ear seat 331 is connected to the groove 311 through the pin 32, and the two ends of the fixing buckle 33 extend along the upper and lower sides of the groove 311; a protrusion 312 is provided on the groove wall of the groove 311 opposite to the fixing buckle 33, and the elastic member 34 is preferably a spring, and the elastic member 34 elastically abuts between the first end of the fixing buckle 33 and the groove wall of the groove 311, and one end of the elastic member 34 is sleeved on the outer side of the protrusion 312 to prevent the elastic member 34 from accidentally detaching from the groove 311; a hook is provided at the second end of the fixing buckle 33, and the second end of the fixing buckle 33 can rotate around the pin 32; a card slot 351 is provided on the fixing buckle seat 35, and the hook is detachably connected to the card slot 351. Under normal circumstances, due to the setting of the elastic member 34, the second end of the fixing buckle 33 is always embedded in the card slot 351; when necessary, the first end of the fixing buckle 33 can be manually pushed to compress the elastic member 34, and at this time the hook portion of the fixing buckle 33 is separated from the card slot 351.

[0038] In this embodiment, the mounting seat 31 is disposed on the pressing plate 21, and the fixing buckle seat 35 is correspondingly disposed on the base 1. In other embodiments, the mounting seat 31 is disposed on the base 1, and the fixing buckle seat 35 is correspondingly disposed on the pressing plate 21.

[0039] exist Figure 3In the figure, the base 1 is provided with ribs 14 on all sides, and the ribs 14 are provided on the outside of the receiving groove 11. The ribs 14 protrude from the top wall of the base 1, and two adjacent ribs 14 are sealed and connected to prevent the tin liquid from entering the receiving groove 11 from the upper part of the base.

[0040] In order to facilitate the placement and removal of the PCB board, two avoidance grooves 15 are also provided on the base 1. The two avoidance grooves 15 are respectively arranged on the opposite sides of the accommodating groove 11, preferably on both sides in the length direction. The avoidance grooves 15 are recessed in the top wall of the base 1. The avoidance grooves 15 are arranged on the inner side of the retaining edge 14 and are connected to the accommodating groove 11.

[0041] Combination Figure 4 and Figure 5 A plurality of through holes 211 are formed through the pressure plate 21, and the plurality of through holes 211 are arranged along a second preset direction, and the second preset direction intersects with the extension direction of the flexible pressure block 22. The fixing block 24 is arranged across the through holes 211, and a connecting portion 212 is formed between two adjacent through holes 211. The connecting portion 212 is used to install the fixing block 24 and / or the elastic pressure column 23 on the one hand, and can cover the position of the PCB board where no components need to be inserted on the other hand, so as to prevent the staff from installing it incorrectly and play a fool-proof role.

[0042] In summary, the utility model provides a plurality of elastic pressure columns distributed in the entire receiving groove, so as to conveniently and dispersedly press the entire PCB board placed in the receiving groove to prevent the PCB board from expanding and deforming due to heat during the wave soldering process; and provides a flexible pressure block to press the components on the PCB board to prevent the components from floating up due to the influence of the wave surge force, which is beneficial to ensuring the quality of the PCB.

[0043] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding carrier, characterized in that: include: A base, wherein the base is provided with a receiving groove and a through hole, and the through hole penetrates the base from the bottom of the receiving groove; A pressing assembly, the pressing assembly includes a pressing plate, a flexible pressing block and a plurality of elastic pressing columns, the pressing plate is hinged on the base, the elastic pressing columns and the flexible pressing block are both arranged on the pressing plate, when the pressing plate is flipped over the base, the flexible pressing block and the elastic pressing columns are both arranged corresponding to the receiving groove, and the plurality of elastic pressing columns are distributed throughout the receiving groove.

2. The welding carrier according to claim 1, characterized in that: The distance that the elastic pressure column protrudes from the bottom wall of the pressure plate is greater than or equal to the distance that the flexible pressure block protrudes from the bottom wall of the pressure plate.

3. The welding carrier according to claim 1, characterized in that: The pressing assembly further comprises a fixing block, wherein the fixing block is connected to the bottom wall of the pressing plate, and the flexible pressing block is arranged on the fixing block.

4. The welding carrier according to claim 3, characterized in that: The fixing block is made of a high temperature resistant rigid material, the flexible pressing block is made of a high temperature resistant flexible material, and the flexible pressing block itself can be elastically retracted.

5. The welding carrier according to claim 4, characterized in that: The number of the flexible pressing blocks is set to be more than two, the two flexible pressing blocks are arranged along the first preset direction of the accommodating groove, and each of the flexible pressing blocks extends perpendicular to the first preset direction, and the fixed blocks are arranged one by one with the flexible pressing blocks.

6. The welding carrier according to claim 1, characterized in that: A positioning column is arranged on the base, and the positioning column is arranged in the accommodating groove.

7. The welding carrier according to claim 1, characterized in that: A locking assembly is connected between the pressing plate and the base.

8. The welding carrier according to claim 7, characterized in that: The locking assembly comprises a mounting seat, a pin shaft, a fixing buckle, an elastic member and a fixing buckle seat, wherein the middle portion of the fixing buckle is connected to the mounting seat via the pin shaft, the elastic member elastically abuts between the first end of the fixing buckle and the mounting seat, the second end of the fixing buckle can rotate around the pin shaft, and the second end of the fixing buckle is detachably connected to the fixing buckle seat; The mounting seat is arranged on the pressing plate, and the fixing buckle seat is arranged on the base, or the mounting seat is arranged on the base, and the fixing buckle seat is arranged on the pressing plate.

9. The welding carrier according to claim 1, characterized in that: The base is provided with ribs around its periphery, the ribs are arranged on the outside of the receiving groove, and the ribs protrude from the top wall of the base; The base is also provided with two avoidance grooves, which are respectively arranged at two opposite sides of the containing groove, and the avoidance grooves are arranged at the inner side of the retaining edge and communicated with the containing groove.

10. The welding carrier according to claim 1, characterized in that: The pressure plate is provided with a plurality of through holes, the plurality of through holes are arranged along a second preset direction, the second preset direction intersects with the extension direction of the flexible pressure block, a connecting portion is formed between two adjacent through holes, the through holes are arranged corresponding to the accommodating grooves, and the flexible pressure block is straddled on the through holes.

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