Clamp for SMT patch production

Abstract

The utility model relates to the technical field of SMT production, in particular to a clamp for SMT patch production, which comprises a base, at least one support frame, a bearing table and a clamping lock assembly, the support frame is arranged on the base and is provided with a through arc-shaped chute, one end of the bearing table is rotatably connected with the support frame through a rotating shaft, and the clamping lock assembly is arranged on the bearing table. The clamping and locking assembly comprises an elastic clamping piece and a connecting piece, the elastic clamping piece is arranged on the supporting frame and located on the same side, extending out of the arc-shaped sliding groove, of the sliding part, one end of the connecting piece is connected with the rotating shaft, and the other end of the connecting piece is connected with the rotating shaft. The other end of the connecting piece is clamped on the elastic clamping piece in a sliding mode, and when acting force is applied to the bearing table, the rotating shaft drives the connecting piece to move relative to the elastic clamping piece. According to the utility model, the angle can be adjusted according to the states of different PCBs, and the test convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of SMT production, and more specifically, to a fixture for SMT chip mounting production. Background Art

[0002] SMT (Surface Mount Technology) is a technology widely used in the electronic assembly industry. It allows electronic components to be directly mounted on the surface of a printed circuit board (PCB), rather than the traditional through-hole insertion method.

[0003] The SMT production process generally includes the following steps: PCB board manufacturing, PCB board pretreatment, solder paste printing, component mounting, reflow soldering, AOI inspection, cleaning, automated testing, repair and rework, and finished product packaging. In automated testing, some small parts that cannot be detected or PCB boards produced by small batch customized orders usually need to be tested manually, and usually the PCB boards are placed on a fixture for testing.

[0004] Since various PCB boards have different sizes and the distribution of components on the PCB boards is irregular, at this time, testers need to adjust the posture according to the states of different PCB boards to perform testing at the most suitable angle. However, the existing fixtures can only play a fixing role and cannot adjust the angle of the PCB board on the fixture at any time, thus affecting the progress of testing. Summary of the Utility Model

[0005] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a fixture for SMT chip mounting production, aiming to be able to adjust the angle according to the states of different PCB boards at any time and improve the convenience of testing.

[0006] A fixture for SMT chip mounting production according to an embodiment of the utility model includes a base, a support frame, a bearing platform, and a locking component. There is at least one support frame provided on the base. The support frame is provided with a through-arc-shaped chute. One end of the bearing platform is rotationally connected to the support frame through a rotating shaft. A sliding part is provided on the part of the bearing platform away from the support frame. The sliding part passes through the arc-shaped chute and extends outside the arc-shaped chute. The locking component includes an elastic clamping member and a connecting member. The elastic clamping member is provided on the support frame and is located on the same side as the part where the sliding part extends outside the arc-shaped chute. One end of the connecting member is connected to the rotating shaft, and the other end of the connecting member is slidably clamped on the elastic clamping member and is connected to the sliding part. When a force is applied to the bearing platform, the rotating shaft drives the connecting member to move relative to the elastic clamping member.

[0007] According to some embodiments of the present utility model, the elastic clamping member includes a first elastic body and a second elastic body arranged opposite to each other. When the outer peripheral wall of the connecting member is clamped between the first elastic body and the second elastic body, the first elastic body and the second elastic body generate a clamping force that hinders the connecting member from falling downward.

[0008] According to some embodiments of the present utility model, the opposite ends of the first elastic body and the second elastic body are correspondingly connected together, and the middle parts of the first elastic body and the second elastic body are in contact with each other.

[0009] According to some embodiments of the present utility model, bump points are provided on one side surface of the first elastic body and the second elastic body facing each other and / or on the outer peripheral wall of the connecting member.

[0010] According to some embodiments of the present utility model, the opposite ends of the first elastic body and the second elastic body are correspondingly connected together, and the middle parts of the first elastic body and the second elastic body are arranged with a gap therebetween, and the gap size is smaller than the width of the connecting member in the direction perpendicular to the extension direction of the first elastic body.

[0011] According to some embodiments of the present utility model, both the first elastic body and the second elastic body are repeatedly bent to form a plurality of bent segments connected in sequence. The bent segments at the same height of the first elastic body and the second elastic body are arranged opposite to each other, and the width of the connecting member in the direction parallel to the extension direction of the first elastic body is greater than the width of the bent segment.

[0012] According to some embodiments of the present utility model, a convex block is provided on the outer peripheral wall of the connecting member, and the size of the convex block is smaller than the width of the bent segment.

[0013] According to some embodiments of the present utility model, the convex block is hemispherical or quasi-spherical.

[0014] According to some embodiments of the present utility model, a limiting component is connected to the rotating shaft. The limiting component includes a first limiting plate and a second limiting plate. One ends of the first limiting plate and the second limiting plate are both connected to the rotating shaft and are arranged at an obtuse angle.

[0015] According to some embodiments of the present utility model, a common connection end is formed between the first limiting plate and the second limiting plate. The limiting component further includes a vertical rod. One end of the vertical rod is connected to the outer peripheral wall of the rotating shaft, and the other end of the vertical rod is connected to the common connection end.

[0016] The fixture for SMT patch production according to the embodiment of the present utility model has at least the following beneficial effects: By providing a latch assembly, when the sliding part on the carrier slides in the arc-shaped chute, the rotating shaft rotates accordingly. Since the connecting member is connected to the rotating shaft, the end of the connecting member away from the rotating shaft also rotates accordingly. Furthermore, the end of the connecting member away from the rotating shaft moves relative to the elastic latch. When the force applied to the carrier is stopped, since the clamping force applied by the elastic latch is greater than the gravity of the carrier, the connecting member remains stationary relative to the elastic latch, thereby achieving the purpose of adjusting the inclination angle of the carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 6 is a schematic structural diagram of the fixture for SMT patch production in the first state according to an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a partial enlarged view of A in FIG. 6;

[0019] Figure 3 FIG. 16 is a schematic structural diagram of the fixture for SMT patch production in the second state according to an embodiment of the present utility model;

[0020] Figure 4 is Figure 3 a partial enlarged view of B in FIG. 16;

[0021] Figure 5 FIG. 26 is a schematic structural diagram of the elastic latch according to an embodiment of the present utility model;

[0022] Figure 6 FIG. 30 is a schematic structural diagram of the elastic latch according to another embodiment of the present utility model;

[0023] Figure 7 FIG. 34 is a schematic structural diagram of the elastic latch according to another embodiment of the present utility model;

[0024] In the figure:

[0025] base 100, swivel base 110, support frame 200, arc-shaped chute 210, carrier 300, rotating shaft 310, sliding part 320, latch assembly 400, elastic latch 410, first elastic body 411, second elastic body 412, bent section 414, connecting member 420, convex block 421, limit assembly 500, first limit plate 510, second limit plate 520, vertical rod 530. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0027] In the description of the present utility model, it should be understood that for the orientation description, such as up, down, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It 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. Therefore, it should not be construed as a limitation of the present utility model.

[0028] In the description of the present utility model, "a plurality" means more than two. If there is a description of the first and the second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0030] Refer to Figures 1 to 7 As shown, the present utility model discloses a fixture for SMT patch production, including a base 100, a support frame 200, a carrier table 300, and a locking assembly 400.

[0031] During testing, the base 100 can be placed on the tabletop of the work test bench, or the base 100 has sufficient height and is placed on the ground of the work site, mainly used to provide a stable support. The carrier table 300 is used to fix different PCB boards. Of course, for the convenience of taking and placing the PCB boards, a detachable buckle assembly can be provided on the carrier table 300, or the PCB boards can be temporarily fixed on the carrier table 300 through fasteners.

[0032] The support frame 200 is provided with at least one and is arranged on the base 100. Exemplarily, two support frames 200 are provided, and the two support frames 200 are arranged on the left and right sides of the base 100. An arc-shaped chute 210 is provided in the middle of the support frame 200, and the arc-shaped chute 210 penetrates through the support frame 200.

[0033] One end of the carrier 300 is provided with a rotating shaft 310. Rotating seats 110 are arranged on both the left and right sides of the base 100. The two ends of the rotating shaft 310 are respectively inserted into the rotating seats 110, so that the carrier 300 can rotate on the rotating seats 110, and thus can perform an up-and-down flipping operation relative to the base 100.

[0034] In order to enable the carrier 300 to stop at any time when rotating on the rotating seat 110, a sliding part 320 is provided on the part of the carrier 300 away from the support frame 200. Optionally, the sliding part 320 can be a round rod or an arc-shaped block. During assembly, the sliding part 320 is inserted into the arc-shaped sliding groove 210 and also extends outside the arc-shaped sliding groove 210. In addition, a locking component 400 is also provided, so that the carrier 300 can be statically inclined at a certain angle through the locking component 400. Specifically, the locking component 400 includes an elastic clamping part 410 and a connecting part 420. The elastic clamping part 410 is arranged on the support frame 200 and is located on the same side as the part where the sliding part 320 extends outside the arc-shaped sliding groove 210. One end of the connecting part 420 is connected to the rotating shaft 310. In this way, when the rotating shaft 310 rotates, the connecting part 420 rotates with the rotating shaft 310, and the other end of the connecting part 420 is clamped between the elastic clamping part 410 and is connected to the part of the sliding part 320 extending outside the arc-shaped sliding groove 210.

[0035] During use, when no force is applied to the carrier 300, the connecting part 420 is statically inclined at a certain angle due to the clamping force applied by the elastic clamping part 410. At this time, the rotating shaft 310 cannot rotate, and the sliding part 320 cannot slide in the arc-shaped sliding groove 210 either, so that the carrier 300 is statically inclined at a certain angle. When a certain downward force is applied to the carrier 300, since the resultant force formed by this force and the gravity of the carrier 300 is greater than the clamping force applied by the elastic clamping part 410, the connecting part 420 can slide on the elastic clamping part 410, and at the same time the sliding part 320 can also slide in the arc-shaped sliding groove 210, so that the carrier 300 rotates downward, and at this time the inclination angle of the carrier 300 decreases. When a certain upward force is applied to the carrier 300, since this force is greater than the resultant force formed by the gravity of the carrier 300 and the clamping force applied by the elastic clamping part 410, the connecting part 420 can slide on the elastic clamping part 410, and at the same time the sliding part 320 can also slide in the arc-shaped sliding groove 210, so that the carrier 300 rotates upward, and at this time the inclination angle of the carrier 300 increases.

[0036] It should be noted that a plurality of support frames 200 arranged at intervals can be provided on the left and right sides of the base 100. Elastic clamping members 410 are provided on each support frame 200. The connecting members 420 on the same side can be simultaneously slidably clamped on all the elastic clamping members 410 on the same side, or can be only slidably clamped on one of the elastic clamping members 410 on the same side, or can be slidably clamped on a plurality of elastic clamping members 410 on the same side.

[0037] In this embodiment, by providing the locking assembly 400, when the sliding portion 320 on the bearing platform 300 slides in the arc-shaped chute 210, the rotating shaft 310 connected to one end of the bearing platform 300 also rotates accordingly. Since the connecting member 420 is connected to the rotating shaft 310, the end of the connecting member 420 away from the rotating shaft 310 also rotates accordingly, causing the end of the connecting member 420 away from the rotating shaft 310 to move relative to the elastic clamping member 410. When the force applied to the bearing platform 300 is stopped, since the clamping force applied by the elastic clamping member 410 is greater than the gravity of the bearing platform 300, the connecting member 420 is stationary relative to the elastic clamping member 410. When a force is applied to the bearing platform 300, since the clamping force applied by the elastic clamping member 410 is less than the resultant force formed by the gravity of the bearing platform 300 and the applied force, or the applied force is greater than the resultant force formed by the gravity of the bearing platform 300 and the clamping force applied by the elastic clamping member 410, the connecting member 420 can slide relative to the elastic clamping member 410. At this time, the bearing platform 300 can rotate at any time, thus finally achieving the purpose of adjusting the inclination angle of the bearing platform 300.

[0038] In some embodiments of the present utility model, such as Figures 5 to 7 shown, the elastic clamping member 410 includes a first elastic body 411 and a second elastic body 412 arranged oppositely. The outer peripheral wall of the connecting member 420 is clamped between the first elastic body 411 and the second elastic body 412. At this time, the first elastic body 411 and the second elastic body 412 generate a clamping force that hinders the connecting member 420 from falling downward, so that the connecting member 420 can be stationary and inclined at a certain angle. When a force is applied to offset the action of the clamping force, the connecting member 420 can slide between the first elastic body 411 and the second elastic body 412.

[0039] In this embodiment, in order to enable the first elastic body 411 and the second elastic body 412 to have certain mechanical strength and elastic properties, both the first elastic body 411 and the second elastic body 412 can be made of metal elastic materials, such as elastic alloys of Fe-Ni-Cr series, Ni-Ct series, Ni-Cr-Nb series, Ni-Co-Cr series, Nb-Ti series, Fe-Ni-Co series, etc., or can be made of non-metallic elastic materials, such as polyurethane, polypropylene, ABS plastic, polycarbonate and other materials.

[0040] In some embodiments of the present utility model, such asFigure 5 As shown, in order to be able to closely adhere to the connecting member 420 when the first elastic body 411 and the second elastic body 412 undergo elastic deformation, as Figure 1 shown, the upper ends of the first elastic body 411 and the second elastic body 412 are connected together, the lower ends of the first elastic body 411 and the second elastic body 412 are also connected together, and the middle parts of the first elastic body 411 and the second elastic body 412 are in contact with each other.

[0041] In this embodiment, the cross-sectional profile of the connecting member 420 can be rod-shaped, sheet-shaped, or ellipsoidal. In order to increase the clamping force without changing the elastic properties of the first elastic body 411 and the second elastic body 412, the cross-sectional profile of the connecting member 420 is preferably sheet-shaped, that is, the surfaces of the connecting member 420 in contact with the first elastic body 411 and the second elastic body 412 are all planar, so as to increase the contact area.

[0042] In some embodiments of the present utility model, in order to further increase the clamping force, bumps (not shown in the drawings) can be provided on the opposite side surfaces of the first elastic body 411 and the second elastic body 412, bumps can also be provided on the outer peripheral wall of the connecting member 420, or bumps can be provided on the opposite side surfaces of the first elastic body 411 and the second elastic body 412 and the outer peripheral wall of the connecting member 420 at the same time. By increasing the frictional force between the first elastic body 411, the second elastic body 412 and the outer peripheral wall of the connecting member 420, the purpose of increasing the clamping force is achieved.

[0043] In some embodiments of the present utility model, as Figure 6 shown, in order to be able to closely adhere to the connecting member 420 when the first elastic body 411 and the second elastic body 412 undergo elastic deformation, as Figure 1 shown, the upper ends of the first elastic body 411 and the second elastic body 412 are connected together, the lower ends of the first elastic body 411 and the second elastic body 412 are also connected together, and the middle parts of the first elastic body 411 and the second elastic body 412 are arranged with a gap, that is, they are not in contact with each other, but the size of this gap is smaller than the width D1 of the connecting member 420 in the direction perpendicular to the extension of the first elastic body 411. In this way, when the connecting member 420 is clamped between the first elastic body 411 and the second elastic body 412, the first elastic body 411 and the second elastic body 412 can undergo elastic deformation to generate a clamping force.

[0044] In some embodiments of the present utility model, as Figure 7As shown, both the first elastomer 411 and the second elastomer 412 are repeatedly bent to form a plurality of bent segments 414 connected in sequence. The bent segments 414 at the same height of the first elastomer 411 and the second elastomer 412 are arranged oppositely. In order to enable the first elastomer 411 and the second elastomer 412 to clamp the connecting member 420, the width D2 of the connecting member 420 in the direction parallel to the extension of the first elastomer 411 is greater than the width D3 of the bent segment 414.

[0045] Since each bent segment 414 has a concave region therein, in order to improve the clamping force, in some embodiments of the present invention, such as Figure 1 As shown, a convex block 421 is provided on the outer peripheral wall of the connecting member 420, and the size of the convex block 421 is smaller than the width D3 of the bent segment 414. In this way, when the connecting member 420 is clamped between the first elastomer 411 and the second elastomer 412, the convex block 421 can be embedded in the concave region, so that the contact area between the connecting member 420 and the first elastomer 411 and the second elastomer 412 can be increased through the contact between the convex block 421 and the concave region.

[0046] In some embodiments of the present invention, in order to reduce the resistance when the connecting member 420 moves, such as Figure 7 As shown, the convex block 421 is set to be hemispherical or quasi-spherical. The hemispherical or quasi-spherical convex block 421 has a certain arc on its surface, so that when a force is applied, it is easy for the convex block 421 to slide relative to the bent segment 414.

[0047] In some cases, the length of the arc-shaped chute 210 and / or the lengths of the first elastomer 411 and the second elastomer 412 may be relatively large, resulting in a relatively large rotation angle of the carrier 300. Then, when a relatively large force is suddenly applied to the carrier 300, the carrier 300 may hit the arc-shaped chute 210 and / or the two ends of the connection between the first elastomer 411 and the second elastomer 412, causing damage to the corresponding components. For this reason, in some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, a limiting component 500 is connected to the rotating shaft 310. Specifically, the limiting component 500 includes a first limiting plate 510 and a second limiting plate 520. One ends of the first limiting plate 510 and the second limiting plate 520 are both connected to the rotating shaft 310, and an obtuse angle is formed between the first limiting plate 510 and the second limiting plate 520. When the rotating shaft 310 rotates a certain angle to one side, one end of the first limiting plate 510 abuts against the surface of the base 100 to prevent the rotating shaft 310 from continuing to rotate. Similarly, when the rotating shaft 310 rotates a certain angle to the other side, the second limiting plate 520 abuts against the surface of the base 100 to prevent the rotating shaft 310 from continuing to rotate, thereby achieving the purpose of limiting the rotation range of the carrier 300.

[0048] In some embodiments of the present utility model, such as Figure 2 and Figure 4 shown, a common connection end 600 is formed between the first limiting plate 510 and the second limiting plate 520. The limiting assembly 500 further includes a vertical rod 530. The upper end of the vertical rod 530 is connected to the outer peripheral wall of the rotating shaft 310, and the lower end of the vertical rod 530 is connected to the common connection end. Taking the common connection end as the origin, an obtuse angle is formed between the extending directions of the first limiting plate 510 and the second limiting plate 520 at both ends of the common connection end 600. By providing the vertical rod 530, the central axis position of the rotating shaft 310 does not have to be close to the surface of the base 100, which facilitates the assembly of the rotating shaft 310. At the same time, by connecting the rotating shaft 310 through the vertical rod 530, the processing difficulty can be reduced because the process of assembling the first limiting plate 510 and the second limiting plate 520 on the rotating shaft 310 is relatively complex, while the vertical rod 530 can be fixed through the installation holes provided on the rotating shaft 310.

[0049] The above has described in detail the embodiments of the present utility model in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the knowledge scope of those of ordinary skill in the art.

Claims

1. A fixture for SMT patch production, characterized in that: The SMT patch production fixture includes: Base; At least one support frame is arranged on the base, and the support frame is provided with an arc-shaped sliding groove running through it; A bearing platform, one end of which is rotatably connected to the support frame via a rotating shaft, a portion of the bearing platform away from the support frame is provided with a sliding portion, the sliding portion is inserted into the arc-shaped slide groove and extends outside the arc-shaped slide groove; The locking assembly includes an elastic clamp and a connecting piece. The elastic clamp is arranged on the support frame and is located on the same side where the sliding part extends outside the arc-shaped sliding groove. One end of the connecting piece is connected to the rotating shaft, and the other end of the connecting piece is slidably clamped on the elastic clamp and connected to the sliding part. When a force is applied to the supporting platform, the rotating shaft drives the connecting piece to move relative to the elastic clamp.

2. The SMT patch production fixture according to claim 1, characterized in that: The elastic clamp includes a first elastic body and a second elastic body arranged opposite to each other. When the outer peripheral wall of the connecting member is clamped between the first elastic body and the second elastic body, the first elastic body and the second elastic body generate a clamping force to prevent the connecting member from falling downward.

3. The SMT patch production fixture according to claim 2, characterized in that: The opposite ends of the first elastic body and the second elastic body are connected together correspondingly, and the middle parts of the first elastic body and the second elastic body are close to each other.

4. The SMT patch production fixture according to claim 3, characterized in that: The surfaces of the first elastic body and the second elastic body facing each other and / or the outer peripheral wall of the connecting member are provided with protrusions.

5. The SMT patch production fixture according to claim 2, characterized in that: The opposite ends of the first elastic body and the second elastic body are connected together correspondingly, a gap is set in the middle of the first elastic body and the second elastic body, and the gap size is smaller than the width of the connecting member in the direction perpendicular to the extension of the first elastic body.

6. The SMT patch production fixture according to any one of claims 2 to 5, characterized in that: The first elastomer and the second elastomer are repeatedly bent to form a plurality of bent sections connected in sequence, the bent sections at the same height of the first elastomer and the second elastomer are arranged relatively to each other, and the width of the connecting member in a direction parallel to the extension of the first elastomer is greater than the width of the bent sections.

7. The SMT patch production fixture according to claim 6, characterized in that: A protrusion is provided on the outer peripheral wall of the connecting piece, and the size of the protrusion is smaller than the width of the bending section.

8. The SMT patch production fixture according to claim 7, characterized in that: The convex block is hemispherical or spherical.

9. The SMT patch production fixture according to any one of claims 1 to 5, characterized in that: The rotating shaft is connected to a limiting assembly, and the limiting assembly includes a first limiting plate and a second limiting plate. One end of the first limiting plate and the second limiting plate are both connected to the rotating shaft and are arranged at an obtuse angle.

10. The SMT patch production fixture according to claim 9, characterized in that: A common connection end is formed between the first limiting plate and the second limiting plate. The limiting assembly further comprises a vertical rod, one end of which is connected to the outer peripheral wall of the rotating shaft, and the other end of which is connected to the common connection end.

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