Anti-deformation PCB furnace-passing carrier tool

Abstract

The utility model discloses an anti-deformation PCB furnace-passing carrier tool, which belongs to the field of surface mounting technology and comprises an assembly base, a fence, a tool connecting part, an accommodating part, a plurality of elastic limiting parts, a swing limiting elastic arm, a seat body connecting block and an angle adjusting mechanism, the enclosure is arranged on the assembling base, the tool connecting part is arranged in the enclosure, and the containing part is arranged in the tool connecting part; the elastic limiting parts are arranged on the two sides of the containing part in a pairwise opposite mode, and each elastic limiting part is connected to the tool connecting part; the two swing limiting elastic arms are oppositely arranged on the two end sides of the containing part, and each swing limiting elastic arm is connected to the tool connecting part. The base body connecting block is arranged at the bottom of the assembling base and connected with the angle adjusting mechanism. According to the utility model, the technical problem of how to reduce the deformation degree before and after the PCB passes through the furnace is solved.

Description

Technical Field

[0001] The utility model relates to the field of surface mounting technology, in particular to an anti-deformation PCB furnace loading fixture for surface mounting process. Background Art

[0002] SMT, whose full name is Surface Mount Technology, means surface mounting technology in Chinese. It is the most popular technology and process in the electronic assembly industry. SMT is a circuit assembly technology that mounts surface-mounted components without pins or short leads, simply called SMC / SMD, whose Chinese name is chip components, on the surface of a printed circuit board, that is, Printed Circuit Board, simply called PCB, or the surface of other substrates, and is soldered and assembled by methods such as reflow soldering or dip soldering.

[0003] A furnace loading fixture, often also called a solder reflow oven fixture, is a new type of PCB tooling fixture for SMT processing. Its main application is to hold the PCB board and send it into the reflow oven for soldering process treatment.

[0004] Based on this, Chinese Patent CN202240048U discloses a furnace loading fixture, which has an outer frame, and an adjustable rod that can move is arranged in the middle of the outer frame; there are two adjustable rods; the adjustable rods and the outer frame are fixed and positioned through positioning bolts; guide slots are arranged on the outer frame and the adjustable rods; support plates are arranged around the bottom of the outer frame and the adjustable rods; the edge of the support plate is serrated. This kind of furnace loading fixture can clamp multiple workpieces at one time, and can adapt to workpieces of different sizes, with a wide adaptation range. The installed workpieces are not easy to slide, ensuring the accuracy of the position, with high production efficiency, and are suitable for mass production of workpieces.

[0005] However, the above-disclosed furnace loading fixture still has the technical problem of easily causing the PCB to deform during use. Specifically, when the above-disclosed furnace loading fixture is used, the positioning bolts need to be loosened first to leave a certain gap between the adjustable rod and the outer frame; then, the workpiece is placed in the gap and supported by the support plate. Next, the adjustable rod is moved towards the outer frame to clamp the workpiece, and the positioning bolts are tightened for positioning to prevent the workpiece from shifting; finally, the furnace loading fixture with the workpiece installed is conveyed into the soldering furnace through a conveyor belt for soldering. It can be seen that this kind of furnace loading fixture mainly realizes the assembly of the PCB board by tightening the positioning bolts; and in this assembly method, during assembly, since it is difficult to control the tightening force of each positioning bolt, thus, it is easy to cause the PCB board to deform; moreover, the deformed PCB board during assembly will also cause an irreversible deformation amplitude to the deformation degree of the PCB board after being treated at the high temperature of the soldering furnace; thereby affecting the processing accuracy of the PCB. Summary of the Utility Model

[0006] Based on this, it is necessary to provide a deformation-preventing PCB furnace loading tooling for the technical problem of how to reduce the deformation degree of the PCB before and after passing through the furnace.

[0007] A deformation-preventing PCB furnace loading tooling includes: an assembly base, a fence, a tooling connection part, a receiving part, a plurality of elastic limiting parts, a swing limiting spring arm, a seat body connection block, and an angle adjustment mechanism; the fence is arranged on the assembly base, the tooling connection part is arranged in the fence, and the receiving part is arranged in the tooling connection part; a plurality of elastic limiting parts are respectively arranged in pairs on both sides of the receiving part, and each elastic limiting part is connected to the tooling connection part; two swing limiting spring arms are arranged oppositely at both ends of the receiving part, and each swing limiting spring arm is connected to the tooling connection part; the seat body connection block is arranged at the bottom of the assembly base, and the seat body connection block is connected to the angle adjustment mechanism.

[0008] Further, the elastic limiting part has a limiting swing seat, a pressing and abutting part, a stepped through hole, a fastener, and a limiting spring.

[0009] Furthermore, the limiting swing seat is movably arranged on the tooling connection part, the pressing and abutting part is arranged on the limiting swing seat, and the pressing and abutting part is movably arranged on the side edge of the receiving part.

[0010] Furthermore, the stepped through hole is arranged in the limiting swing seat, the fastener passes through the stepped through hole and is connected to the tooling connection part, the limiting swing seat is movably connected to the fastener, and the limiting spring is arranged between the stepped through hole and the fastener.

[0011] Furthermore, the swing limiting spring arm has a spring arm connection seat, a swing shaft, a spring arm structure, a pressing block structure, and a connecting part.

[0012] Furthermore, the spring arm connection seat is arranged on the tooling connection part, and the swing shaft is respectively connected to the spring arm connection seat and the spring arm structure.

[0013] Furthermore, one end of the spring arm structure is movably connected to the swing shaft, a pressing block structure is arranged below the other end of the spring arm structure, the pressing block structure is movably arranged above the receiving part, and the connecting part is respectively connected to the pressing block structure and the spring arm structure.

[0014] Furthermore, the angle adjustment mechanism has an adjustment seat frame, a driving cylinder, a telescopic rod, a coupling structure, a first connecting rod structure, and a second connecting rod structure.

[0015] Further, a driving cylinder is arranged in the adjusting seat frame. The driving cylinder is drivingly connected to the telescopic rod, and two ends of the coupling structure are respectively movably connected to the adjusting seat frame.

[0016] Further, the middle part of the coupling structure is respectively connected to the end of the telescopic rod and one end of the first link structure; the other end of the first link structure is hinged to one end of the second link structure, the other end of the second link structure is hinged to the adjusting seat frame, and the seat body connecting block is movably connected to the angle adjusting mechanism.

[0017] In summary, the anti-deformation PCB furnace loading tooling of the present utility model is respectively provided with an assembly base, a fence, a tooling connection part, a receiving part, a plurality of elastic limiting parts, a swing limiting spring arm, a seat body connecting block and an angle adjusting mechanism; the fence is arranged on the assembly base, the tooling connection part is arranged in the fence, and the receiving part is arranged in the tooling connection part; a plurality of elastic limiting parts are respectively arranged in pairs on both sides of the receiving part, and each elastic limiting part is connected to the tooling connection part; the two swing limiting spring arms are oppositely arranged on both ends of the receiving part, and each swing limiting spring arm is connected to the tooling connection part; the seat body connecting block is arranged at the bottom of the assembly base, and the seat body connecting block is connected to the angle adjusting mechanism. The elastic limiting parts can respectively elastically limit and press the periphery of the PCB, and the swing limiting spring arm can elastically limit and press the middle of the PCB. Thus, the PCB can be stably limited and connected to the receiving part by using elastic pressure to avoid the deformation of the PCB. Therefore, the anti-deformation PCB furnace loading tooling of the present utility model solves the technical problem of how to reduce the deformation degree of the PCB before and after passing through the furnace. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of an anti-deformation PCB furnace loading tooling of the present utility model;

[0019] Figure 2 It is a schematic structural diagram of a partial structure of an anti-deformation PCB furnace loading tooling of the present utility model in another direction;

[0020] Figure 3 It is an exploded structural diagram of a partial structure of an anti-deformation PCB furnace loading tooling of the present utility model;

[0021] Figure 4 It is a schematic structural diagram of an anti-deformation PCB furnace loading tooling of the present utility model in another direction. Detailed Embodiments

[0022] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0028] Please refer to Figures 1 to 4 , a deformation-proof PCB furnace loading tooling of the present utility model includes: an assembly base 1, a retaining wall 2, a tooling connection part 3, a receiving part 4, a plurality of elastic limiting parts 5, a swing limiting spring arm 6, a seat body connection block 7 and an angle adjustment mechanism 8; the retaining wall 2 is disposed on the assembly base 1, the tooling connection part 3 is disposed in the retaining wall 2, and the receiving part 4 is disposed in the tooling connection part 3; a plurality of elastic limiting parts 5 are respectively disposed in pairs on both sides of the receiving part 4, and each elastic limiting part 5 is connected to the tooling connection part 3; the two swing limiting spring arms 6 are disposed opposite to each other at both ends of the receiving part 4, and each swing limiting spring arm 6 is connected to the tooling connection part 3; the seat body connection block 7 is disposed at the bottom of the assembly base 1, and the seat body connection block 7 is connected to the angle adjustment mechanism 8.

[0029] Specifically, when loading a PCB and surface-mounted components using the anti-deformation PCB furnace loading tooling of the present utility model, the PCB can be placed on the accommodating portion 4. The accommodating portion 4 is a cavity-shaped structure to facilitate the placement of the PCB. Thereafter, each elastic limiting portion 5 is swung from above the tooling connection portion 3 to above the accommodating portion 4, and is pairwise connected and limited to the PCB from both sides of the accommodating portion 4, so that the periphery of the PCB is uniformly stressed to avoid deformation of the PCB. Specifically, the elastic limiting portion 5 has an elastic abutting structure to replace the problem of PCB deformation caused by uneven stress during operations such as screwing. In addition, by staggering the side surfaces where the elastic limiting portions 5 are provided, two of the swing limiting spring arms 6 are respectively oppositely provided at the other two end sides of the accommodating portion 4. The operator swings the spring arm structure provided thereon onto the PCB of the accommodating portion 4 to further elastically press and limit the middle region of the PCB, thereby solving the problem of the middle portion of the PCB bulging and deforming in the prior art due to only limiting the edge of the PCB. Further, the seat body connecting block 7 is used to connect the assembly seat body 1 to the angle adjustment mechanism 8, so as to facilitate the angle adjustment mechanism 8 to adjust the operation angle of the assembly base 1. Specifically, during the use of the existing furnace loading tooling, the operator often needs to perform operations such as limiting and assembling the PCB and inserting large components onto the PCB on a flat workbench. During this process, the operator often needs to bend down and operate with the head down; when the working time is long, defects such as fatigue and misassembly are likely to occur. Through the angle adjustment mechanism 8, the operation plane of the operator can be set, so that the operator can obtain a more comfortable operation angle, thereby reducing the fatigue during operation and also helping to improve the assembly efficiency of the furnace loading tooling. Thus, it can be seen that the anti-deformation PCB furnace loading tooling of the present utility model solves the technical problems of how to reduce the deformation degree of the PCB before and after passing through the furnace and improve the assembly efficiency of the furnace loading tooling.

[0030] Furthermore, the elastic limiting part 5 includes a limiting swing seat 501, a pressing abutting part 502, a stepped through hole 503, a fastener 504 and a limiting spring 505. The limiting swing seat 501 is movably arranged on the tooling connection part 3. The pressing abutting part 502 is arranged on the limiting swing seat 501, and the pressing abutting part 502 is movably arranged on the side edge of the accommodating part 4. The stepped through hole 503 is arranged in the limiting swing seat 501. The fastener 504 passes through the stepped through hole 503 and is connected to the tooling connection part 3. The limiting swing seat 501 is movably connected to the fastener 504, and the limiting spring 505 is arranged between the stepped through hole 503 and the fastener 504. Specifically, the limiting swing seat 501 is movably arranged above the tooling connection part 3. After the fastener 504 passes through the stepped through hole 503, the limiting swing seat 501 is limited and connected to the tooling connection part 3, and the limiting swing seat 501 can swing along the radial direction of the fastener 504, so as to swing the pressing abutting part 502 from above the tooling connection part 3 to above the accommodating part 4 to perform limiting connection on the PCB placed on the accommodating part 4. A limiting spring 505 is also arranged between the stepped through hole 503 and the fastener 504 to apply elastic pressure to the upper part of the limiting swing seat 501 through the elastic force of the spring. Thus, the elastic pressure can be transmitted to the upper part of the PCB through the pressing abutting part 502, so as to realize elastic limiting and pressing of the PCB workpiece.

[0031] Furthermore, the swing limiting elastic arm 6 includes an elastic arm connection seat 601, a swing shaft 602, an elastic arm structure 603, a pressing block structure 604 and a connecting part 605. The elastic arm connection seat 601 is arranged on the tooling connection part 3. The swing shaft 602 is respectively connected to the elastic arm connection seat 601 and the elastic arm structure 603. One end of the elastic arm structure 603 is movably connected to the swing shaft 602, and the pressing block structure 604 is arranged below the other end of the elastic arm structure 603. The pressing block structure 604 is movably arranged above the accommodating part 4, and the connecting part 605 is respectively connected to the pressing block structure 604 and the elastic arm structure 603. Specifically, the elastic arm structure 603 can be a swing arm structure formed by stamping a spring sheet. One end of it can rotate around the swing shaft 602, and the other end can swing the pressing block structure 604 to a preset position above the PCB to be furnace-passed, so as to facilitate eliminating bad assembly conditions such as the middle part bulging when the four sides of the PCB are limited.

[0032] Further, in addition to connecting the assembly base 1 to the angle adjustment mechanism 8, the base connection block 7 can also serve as a connection positioning point for the assembly base 1 to be paired with external transfer and transmission mechanisms such as an oven conveyor belt.

[0033] Further, the angle adjustment mechanism 8 includes an adjustment base frame 801, a driving cylinder 802, a telescopic rod 803, a coupling structure 804, a first link structure 805, and a second link structure 806; the driving cylinder 802 is disposed in the adjustment base frame 801, the driving cylinder 802 is drivingly connected to the telescopic rod 803, both ends of the coupling structure 804 are movably connected to the adjustment base frame 801 respectively, the middle part of the coupling structure 804 is respectively connected to the end of the telescopic rod 803 and one end of the first link structure 805; the other end of the first link structure 805 is hinged to one end of the second link structure 806, the other end of the second link structure 806 is hinged to the adjustment base frame 801, and the base connection block 7 is movably connected to the angle adjustment mechanism 8. Specifically, when the driving cylinder 802 drives the telescopic rod 803 to shorten, the first link structure 805 can be driven to retract through the coupling structure 804. Thus, through the mutual movement of the link structures, the second link structure 806 can be lifted to a preset angle, and then the assembly base 1 can be adjusted to a preset operating angle. When it is necessary to flatten the assembly base 1, the driving cylinder 802 can be controlled to drive the telescopic rod 803 to extend, and then drive the first link structure 805 and the second link structure 806 to swing back to their original positions.

[0034] In summary, the anti-deformation PCB furnace loading tooling of the present utility model is respectively provided with an assembly base 1, a retaining wall 2, a tooling connection part 3, a receiving part 4, a plurality of elastic limiting parts 5, a swing limiting spring arm 6, a seat body connection block 7 and an angle adjustment mechanism 8; the retaining wall 2 is arranged on the assembly base 1, the tooling connection part 3 is arranged in the retaining wall 2, and the receiving part 4 is arranged in the tooling connection part 3; a plurality of elastic limiting parts 5 are respectively arranged in pairs on both sides of the receiving part 4, and each elastic limiting part 5 is connected to the tooling connection part 3; the two swing limiting spring arms 6 are arranged opposite to each other on both ends of the receiving part 4, and each swing limiting spring arm 6 is connected to the tooling connection part 3; the seat body connection block 7 is arranged at the bottom of the assembly base 1, and the seat body connection block 7 is connected to the angle adjustment mechanism 8. The elastic limiting parts 5 can respectively elastically limit and press the periphery of the PCB, and the swing limiting spring arms 6 can elastically limit and press the middle of the PCB. Thus, the PCB can be stably limited and connected to the receiving part 4 by elastic pressure to avoid deformation of the PCB. Therefore, the anti-deformation PCB furnace loading tooling of the present utility model solves the technical problem of how to reduce the deformation degree of the PCB before and after passing through the furnace.

[0035] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0036] The above embodiments only represent several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A deformation-proof PCB furnace carrier tooling, characterized in that: It includes: An assembly base (1), a baffle (2), a tooling connection part (3), a receiving part (4), a plurality of elastic limiting parts (5), a swing limiting elastic arm (6), a seat body connection block (7) and an angle adjustment mechanism (8); the baffle (2) is arranged on the assembly base (1), the tooling connection part (3) is arranged in the baffle (2), and the receiving part (4) is arranged in the tooling connection part (3); the plurality of elastic limiting parts (5) are arranged on both sides of the receiving part (4) in pairs, and each of the elastic limiting parts (5) is connected to the tooling connection part (3); the two swing limiting elastic arms (6) are arranged on the two end sides of the receiving part (4) in pairs, and each of the swing limiting elastic arms (6) is connected to the tooling connection part (3); the seat body connection block (7) is arranged at the bottom of the assembly base (1), and the seat body connection block (7) is connected to the angle adjustment mechanism (8).

2. The anti-deformation PCB furnace carrier tooling according to claim 1 is characterized by: The elastic limiting portion (5) comprises a limiting swing seat (501), a pressing abutment portion (502), a stepped through hole (503), a fastener (504) and a limiting spring (505).

3. The anti-deformation PCB furnace carrier tooling according to claim 2 is characterized by: The position-limiting swing seat (501) is movably arranged on the tooling connection portion (3), the pressing and abutting portion (502) is arranged on the position-limiting swing seat (501), and the pressing and abutting portion (502) is movably arranged on the side edge of the accommodating portion (4).

4. The anti-deformation PCB furnace carrier tooling according to claim 3 is characterized by: The stepped through hole (503) is arranged in the limit swing seat (501), the fastener (504) passes through the stepped through hole (503) and is connected to the tooling connection part (3), the limit swing seat (501) and the fastener (504) are movably connected, and the limit spring (505) is arranged between the stepped through hole (503) and the fastener (504).

5. The anti-deformation PCB furnace carrier tooling according to claim 4 is characterized by: The swing-limiting elastic arm (6) comprises an elastic arm connecting seat (601), a swing shaft (602), an elastic arm structure (603), a pressing block structure (604) and a connecting piece (605).

6. The anti-deformation PCB furnace carrier tooling according to claim 5, characterized in that: The elastic arm connection seat (601) is arranged on the tooling connection portion (3), and the swing shaft (602) is respectively connected to the elastic arm connection seat (601) and the elastic arm structure (603).

7. The anti-deformation PCB furnace carrier tooling according to claim 6, characterized in that: One end of the elastic arm structure (603) is movably connected to the swing shaft (602), and the pressure block structure (604) is arranged below the other end of the elastic arm structure (603). The pressure block structure (604) is movably arranged above the accommodating portion (4), and the connecting member (605) respectively connects the pressure block structure (604) and the elastic arm structure (603).

8. The anti-deformation PCB furnace carrier tooling according to claim 7, characterized in that: The angle adjustment mechanism (8) comprises an adjustment seat frame (801), a driving cylinder (802), a telescopic rod (803), a coupling structure (804), a first connecting rod structure (805) and a second connecting rod structure (806).

9. The anti-deformation PCB furnace carrier tooling according to claim 8, characterized in that: The driving cylinder (802) is arranged in the adjusting seat frame (801), and the driving cylinder (802) is drivingly connected to the telescopic rod (803), and the two ends of the coupling structure (804) are movably connected to the adjusting seat frame (801).

10. The anti-deformation PCB furnace carrier tooling according to claim 9, characterized in that: The middle part of the coupling structure (804) is respectively connected to the end of the telescopic rod (803) and one end of the first connecting rod structure (805); the other end of the first connecting rod structure (805) is hinged to one end of the second connecting rod structure (806), and the other end of the second connecting rod structure (806) is hinged to the adjustment seat frame (801), and the seat body connecting block (7) is movably connected to the angle adjustment mechanism (8).

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