PCB clamp

Abstract

The utility model discloses a PCB clamp, which relates to the PCB processing field, and comprises a clamp template, the upper surface of the clamp template is provided with a guide groove, two sides of the guide groove are provided with through grooves, the through grooves are provided with step surfaces close to the lower surface of the clamp template, a positioning clip used for fixing a PCB is placed in the guide groove, the positioning clip comprises a positioning slip sheet and a special-shaped spring, and the positioning slip sheet and the special-shaped spring are arranged on the clamp template. A spring groove is formed in a first protruding block of the positioning sliding piece, the special-shaped spring is a fork-shaped piece formed by bending a metal wire, a spiral part of the special-shaped spring extends into the spring groove, two rod-shaped parts of the special-shaped spring extend into through grooves in the two sides of the guide groove respectively and abut against the step face, a positioning column is arranged on a second protruding block, and an elastic protruding structure is arranged on the side face of the positioning column. According to the utility model, the structure is simple, the special-shaped spring is convenient to assemble and disassemble, the PCB is easy to fix, bending deformation of the PCB during high-temperature welding can be avoided, the PCB is prevented from being separated from the template, the working efficiency is improved, the yield of the PCB is improved, the productivity is improved, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of PCB processing technology, and in particular to a PCB fixture. Background Technology

[0002] A PCB (Printed Circuit Board) is an electronic component that is printed and spatially arranged to mount electronic components. Modern PCBs typically consist of two or more substrate layers. Surface Mount Technology (SMT) is a circuit assembly technology that mounts leadless or short-lead surface-mount components onto the surface of a PCB and then solders them using methods such as reflow soldering or dip soldering. When mounting components and soldering solid parts in reflow soldering equipment, the high temperature environment can easily cause PCB deformation, leading to shielding frame desoldering, increasing the PCB defect rate, reducing production capacity, and increasing production costs. Patent application CN200920144529.5 discloses a PCB board clamp, including a clamp template. The clamp template is composed of upper and lower plates staggered vertically and interconnected. A groove formed between the upper and lower plates allows for the placement of a PCB. A guide groove is also provided along the longitudinal direction of the PCB on the clamp template, with its two ends respectively located on the upper and lower plates. A positioning clip, which cooperates with the clamp template to fix the PCB, is placed in the guide groove. The positioning clip includes a positioning piece with a slider and a spring mounting groove, and a shaped spring. The positioning piece is inserted into the guide groove and can slide along it. A strip groove is provided on the lower end face of the upper plate where one end of the guide groove is located. This strip groove intersects with one end of the guide groove, and the intersection is a through hole. The shaped spring is a hook-shaped piece formed by bending one end of a straight metal wire. The shaped spring is embedded in... In the spring mounting slot, the hook-shaped part of the spring mounting piece supports the inner wall of one side of the slot, while the rod-shaped part fits against the inner wall of the strip groove and the inner wall of the other side of the spring mounting slot. A positioning protrusion is provided at one end of the positioning piece near the lower plate, which can mate with the positioning hole on the PCB. In this technical solution, a shaped spring is inserted into the spring mounting slot, and the rod-shaped part of the shaped spring extends into the strip groove of the back plate, thereby engaging and fixing the positioning copper piece. The shaped spring also applies a pushing force to the positioning copper piece. Although this structure can eliminate some components and save production costs, the distance between the bottom of the spring mounting slot and the bottom of the strip groove is small, making it difficult for the dry part of the shaped spring to extend into the strip groove. Furthermore, although a positioning protrusion is provided to mate with the positioning hole on the PCB, the positioning protrusion cannot provide axial positioning for the PCB, causing the PCB to easily detach from the template during deformation. Therefore, this utility model discloses a PCB fixture to solve the above problems. Utility Model Content

[0003] Therefore, it is necessary to provide a PCB fixture that addresses the aforementioned technical problems. This fixture has a simple structure, with a uniquely shaped spring that is easy to assemble and disassemble. The elastic protrusion structure can press the PCB, making it easy to fix the PCB. This prevents the PCB from bending and deforming during high-temperature soldering, and prevents the PCB from detaching from the template. This improves work efficiency, increases the PCB yield, increases production capacity, and reduces costs.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A PCB fixture includes a fixture template having an upper surface and a lower surface. The upper surface of the fixture template is recessed to form a groove for placing a PCB. The upper surface of the fixture template has a guide groove extending into the groove. The guide groove has through grooves on both sides, and the through grooves have stepped surfaces near the lower surface of the fixture template. A positioning paperclip for fixing the PCB is placed in the guide groove. The positioning paperclip includes a positioning slider and a shaped spring. The two ends of the positioning slider are respectively provided with a first protrusion and a second protrusion. The first protrusion has a spring groove. The shaped spring is a fork-shaped part formed by bending metal wire. The shaped spring includes a helical part and two rod-shaped parts. The helical part of the shaped spring extends into the spring groove, and the two rod-shaped parts extend into the through grooves on both sides of the guide groove and abut against the stepped surfaces. The second protrusion has a positioning post, and the side of the positioning post has an elastic protrusion structure.

[0006] In a preferred embodiment of the PCB fixture provided by this utility model, the upper surface of the fixture template is provided with a shallow groove that crosses with the guide groove, and the lower surface of the fixture template is provided with strip grooves on both sides of the guide groove. The strip grooves are staggered and connected with the shallow groove to form a through groove, and the bottom surface of the strip groove is staggered from the shallow groove to form a stepped surface.

[0007] In a preferred embodiment of the PCB fixture provided by this utility model, the bottom surface of the groove is provided with a plurality of heat dissipation grooves, and the bottom surface of the heat dissipation grooves is provided with a plurality of heat dissipation through holes.

[0008] In a preferred embodiment of the PCB fixture provided by this utility model, the bottom surface of the heat sink is provided with a plurality of support protrusions, which avoid the heat dissipation through holes.

[0009] In a preferred embodiment of the PCB fixture provided by this utility model, the first protrusion and the second protrusion respectively abut against the two ends of the guide groove.

[0010] In a preferred embodiment of the PCB fixture provided by this utility model, both ends of the positioning slide are provided with sliding parts, and both ends of the guide groove extend outward into limiting grooves, and the sliding parts are slidably connected to the limiting grooves.

[0011] In a preferred embodiment of the PCB fixture provided by this utility model, the lower surface of the fixture template is provided with deep grooves at both ends of the guide groove, the ends of the deep grooves and the guide grooves have overlapping portions, and the deep grooves and the guide grooves form a limiting slide groove.

[0012] As a preferred embodiment of the PCB fixture provided by this utility model, the elastic protrusion structure includes two symmetrically arranged locking blocks, which are connected by an elastic element. The positioning post is provided with an insertion groove and the two sides of the insertion groove are provided with outlets communicating with the side wall of the positioning post. The elastic protrusion structure is placed into the insertion groove and the locking blocks extend out from the outlets. The upper surface of the locking blocks is provided with limiting protrusions.

[0013] In a preferred embodiment of the PCB fixture provided by this utility model, the top surface of the positioning post is provided with a circular groove communicating with the insertion slot, and a sealing cover is installed in the circular groove.

[0014] In a preferred embodiment of the PCB fixture provided by this utility model, the two clamping blocks have an arc-shaped structure at their opposite ends, and the arc is consistent with the side arc of the positioning post. The upper and lower corners of the opposite ends of the two clamping blocks are chamfered.

[0015] Compared with the prior art, the present invention has the following advantages: The PCB fixture provided by the present invention limits the sliding distance of the positioning slide along the guide groove by the first protrusion and the second protrusion. The spring groove on the first protrusion and the stepped surface in the through groove are embedded with the irregular spring. While the irregular spring presses the positioning slide, it can elastically abut against the positioning slide along the guide groove. The structure is simple, the irregular spring is easy to assemble and disassemble, and the elastic protrusion structure on the positioning post can press the PCB, which is easy to fix the PCB. It can prevent the PCB from bending and deforming during high temperature soldering, prevent the PCB from falling off the template, improve work efficiency, increase the yield of PCB, increase production capacity, and reduce costs. Attached Figure Description

[0016] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A three-dimensional schematic diagram of the overall structure of the PCB fixture provided by this utility model;

[0018] Figure 2Another perspective three-dimensional schematic diagram of the overall structure of the PCB fixture provided by this utility model;

[0019] Figure 3 A partial three-dimensional structural schematic diagram of the PCB fixture provided by this utility model;

[0020] Figure 4 for Figure 3 Another perspective 3D illustration;

[0021] Figure 5 An exploded view of the positioning paperclip in the PCB fixture provided by this utility model;

[0022] Figure 6 This is a schematic diagram of the positioning column structure in the PCB fixture provided by this utility model;

[0023] Figure 7 An exploded view of the positioning post in the PCB fixture provided by this utility model;

[0024] Figure 8 This is a schematic diagram of the elastic protrusion structure in the PCB fixture provided by this utility model.

[0025] The markings in the diagram are explained as follows:

[0026] 1. Fixture template; 101. Upper surface; 102. Lower surface; 2. Groove; 3. Pick-up and drop groove; 4. Guide groove; 5. Positioning slide; 501. First protrusion; 502. Second protrusion; 503. Spring groove; 504. Sliding part; 6. Irregular spring; 601. Spiral part; 602. Rod-shaped part; 7. Positioning post; 701. Insertion groove; 702. Outlet; 703. Circular groove; 704. Sealing cover; 8. Elastic protrusion structure; 801. Locking block; 802. Elastic element; 803. Limiting protrusion; 804. Arc structure; 805. Chamfer; 9. Shallow groove; 10. Strip groove; 11. Stepped surface; 12. Heat dissipation groove; 13. Heat dissipation through hole; 14. Support protrusion; 15. Deep groove. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0028] As described in the background art, the existing PCB fixture structure can eliminate some components and save production costs. However, in this structure, the distance between the bottom of the spring mounting groove and the bottom of the strip groove is small, which makes it difficult for the dry part of the irregular spring to extend into the strip groove. Moreover, although a positioning protrusion is provided to cooperate with the positioning hole on the PCB, the positioning protrusion cannot position the PCB axially, which makes the PCB easy to detach from the template when deformed.

[0029] To solve this technical problem, this utility model provides a PCB fixture that is applied in the field of PCB processing.

[0030] For details, please refer to Figure 1-8 The PCB fixture specifically includes a fixture template 1, which has an upper surface 101 and a lower surface 102. The upper surface 101 of the fixture template 1 is recessed to form a groove for placing the PCB. The upper surface 101 of the fixture template 1 is provided with a guide groove 4 extending into the groove. The guide groove 4 has through grooves on both sides, and the through grooves have stepped surfaces 11 near the lower surface 102 of the fixture template 1. A positioning clip for fixing the PCB is placed in the guide groove 4. The positioning clip includes a positioning slider 5 and a shaped spring 6. The two ends of 5 are respectively provided with a first protrusion 501 and a second protrusion 502. The first protrusion 501 is provided with a spring groove 503. The irregular spring 6 is a fork-shaped part formed by bending metal wire. The irregular spring 6 includes a spiral part 601 and two rod-shaped parts 602. The spiral part 601 of the irregular spring 6 extends into the spring groove 503. The two rod-shaped parts 602 extend into the through grooves on both sides of the guide groove 4 and abut against the stepped surface 11. The second protrusion 502 is provided with a positioning post 7. The side of the positioning post 7 is provided with an elastic protrusion structure 8.

[0031] The PCB fixture provided by this utility model limits the sliding distance of the positioning slide 5 along the guide groove 4 by the first protrusion 501 and the second protrusion 502. The spring groove 503 on the first protrusion 501 and the stepped surface 11 in the through groove are embedded and installed with the irregular spring 6. The irregular spring 6 presses the positioning slide 5 while elastically resisting the positioning slide 5 to slide along the guide groove 4. The structure is simple, the irregular spring 6 is easy to assemble and disassemble, and the elastic protrusion structure 8 on the positioning post 7 can press the PCB, which is easy to fix the PCB. It can prevent the PCB from bending and deforming during high temperature soldering, prevent the PCB from falling off the template, improve work efficiency, increase the yield of PCB, increase production capacity, and reduce costs.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] Example 1

[0036] Please refer to Figure 1-6 A PCB fixture is provided, comprising a fixture template 1 having an upper surface 101 and a lower surface 102. The upper surface 101 of the fixture template 1 is recessed to form a groove 2 for placing the PCB, and pick-and-place slots 3 are provided on both sides of the groove 2. The depth of the pick-and-place slots 3 is greater than the depth of the groove 2, and the pick-and-place slots 3 and the groove 2 have overlapping portions. The upper surface 101 of the fixture template 1 is provided with guide slots 4 extending into the groove 2. Three guide slots 4 are provided on each side of the groove 2 and are symmetrically arranged. Through slots are provided on both sides of the guide slots 4, and the through slots have stepped surfaces 11 near the lower surface 102 of the fixture template 1. Positioning clips for fixing the PCB are placed in the guide slots 4. The positioning clips include positioning sliders 5. The irregular spring 6 and the positioning slide 5 are respectively provided with a first protrusion 501 and a second protrusion 502 at both ends. The first protrusion 501 is provided with a spring groove 503. The irregular spring 6 is a fork-shaped part formed by bending metal wire. The irregular spring 6 includes a spiral part 601 and two rod-shaped parts 602. The spiral part 601 of the irregular spring 6 extends into the spring groove 503. The two rod-shaped parts 602 extend into the through grooves on both sides of the guide groove 4 and abut against the stepped surface 11, thereby embedding and fixing the irregular spring 6. The second protrusion 502 is provided with a positioning post 7. The positioning post 7 matches the positioning hole on the PCB. The positioning post 7 is inserted and fixed to the second protrusion 502. The side of the positioning post 7 is provided with an elastic protrusion structure 8.

[0037] The upper surface 101 of the clamp template 1 is provided with a shallow groove 9 that crosses the guide groove 4. The shallow groove 9 is not located in the groove 2. The lower surface 102 of the clamp template 1 is provided with strip grooves 10 on both sides of the guide groove 4. The strip grooves 10 and the shallow grooves 9 are staggered and connected to form a through groove. The bottom surface of the strip groove 10 and the part that is staggered from the shallow groove 9 forms a stepped surface 11. During installation, the two rod-shaped parts 602 of the irregular spring 6 are first inserted from the shallow groove 9 into the strip groove 10. Then, the spiral part 601 is pressed into the spring groove 503 of the first protrusion 501. Under the support of the positioning slide 5, the two rod-shaped parts 602 abut against the stepped surface 11, thereby embedding and fixing the irregular spring 6, and then elastically pressing the positioning slide 5. The first protrusion 501 and the second protrusion 502 on the positioning slide 5 abut against the two ends of the guide groove 4, thereby limiting the sliding distance of the positioning slide 5 along the length direction of the guide groove 4.

[0038] The bottom surface of the groove 2 is provided with several heat dissipation grooves 12, the bottom surface of the heat dissipation grooves 12 is provided with several heat dissipation through holes 13, and the bottom surface of the heat dissipation grooves 12 is provided with several support protrusions 14. The support protrusions 14 avoid the heat dissipation through holes 13. When working in the reflow oven, the heat dissipation through holes 13 can effectively play the role of heat dissipation. The setting of the heat dissipation grooves 12 can improve the heat dissipation effect. In addition, the heat dissipation through holes 13 can also serve as a clearance area for components on the PCB, which facilitates the assembly of components.

[0039] Example 2

[0040] The PCB fixture provided in Example 1 is further optimized, specifically, as follows: Figures 3-5 As shown, both ends of the positioning slide plate 5 are provided with sliding portions 504. The two ends of the positioning slide plate 5 extend outward from the first protrusion 501 and the second protrusion 502 respectively to form sliding portions 504. The two ends of the guide groove 4 extend outward with limiting grooves. The sliding portions 504 are slidably connected with the limiting grooves. Specifically, the lower surface 102 of the fixture template 1 is provided with deep grooves 15 at both ends of the guide groove 4. The ends of the deep grooves 15 and the guide groove 4 have overlapping portions. This overlap includes the overlap of the deep grooves 15 and the guide groove 4 in the length direction and the overlap of the deep grooves 15 and the guide groove 4 in the depth direction. The deep grooves 15 and the guide groove 4 form limiting grooves. The limiting grooves limit the sliding portions 504 at both ends of the positioning slide plate 5 in the upper and lower directions, further limiting the positioning slide plate 5 and ensuring that the positioning slide plate 5 will not fall out of the guide groove 4.

[0041] Example 3

[0042] The PCB fixture provided in Example 2 is further optimized, specifically, as follows: Figures 5-8As shown, the elastic protrusion structure 8 includes two symmetrically arranged locking blocks 801, which are connected by an elastic element 802. In this example, the elastic element 802 is a spring. The positioning post 7 is provided with an insertion groove 701, and the two sides of the insertion groove 701 are provided with outlets 702 that communicate with the side wall of the positioning post 7. The elastic protrusion structure 8 is placed into the insertion groove 701 and the locking blocks 801 extend out from the outlets 702. The surface of the locking blocks 801 is provided with a limiting protrusion 803, which limits the sliding distance of the locking blocks 801 to prevent the locking blocks 801 from sliding out from the outlets 702. The top of the positioning post 7 is a conical structure, which facilitates the insertion of the limiting hole on the PCB into the positioning post 7. During the process of pressing down the PCB, the two locking blocks 801 move closer to each other. When the PCB is pressed down to the locking blocks 801, the elastic element 802 drives the two locking blocks 801 to move away from each other to limit the PCB.

[0043] The top surface of the positioning post 7 has a circular groove 703 that communicates with the insertion slot 701. A sealing cover 704 is installed inside the circular groove 703. The circular groove 703 is designed to facilitate the placement of the elastic protrusion structure 8 and is sealed by the sealing cover 704. The sealing cover 704 is threadedly connected to the circular groove 703. At the same time, a cross groove is provided on the top surface of the sealing cover 704 for easy installation with a Phillips screwdriver. The opposite ends of the two locking blocks 801 are arc-shaped structures 804, and the curvature of the arc structure 804 is consistent with the side curvature of the positioning post 7. The upper and lower corners of the opposite ends of the two locking blocks 801 are chamfered 805 to facilitate PCB pressing and disassembly.

[0044] The working principle of the PCB fixture provided by this utility model is as follows: The sliding distance of the positioning slide 5 along the guide groove 4 is limited by the first protrusion 501 and the second protrusion 502. The spring groove 503 on the first protrusion 501 and the stepped surface 11 in the through groove are embedded and installed with the irregular spring 6. The irregular spring 6 presses the positioning slide 5 while elastically resisting the positioning slide 5 to slide along the guide groove 4. The structure is simple, the irregular spring 6 is easy to assemble and disassemble. At the same time, the elastic protrusion structure 8 on the positioning post 7 can press the PCB, which is easy to fix the PCB. It can prevent the PCB from bending and deforming during high temperature soldering, prevent the PCB from falling off the template, improve work efficiency, increase the yield of PCB, increase production capacity, and reduce costs.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A PCB fixture, comprising a fixture template having an upper surface and a lower surface, the upper surface of the fixture template being recessed to form a groove for placing a PCB, and the upper surface of the fixture template being provided with a guide groove extending into the groove, characterized in that, The guide groove has through grooves on both sides, and the through grooves have stepped surfaces near the lower surface of the fixture template. Positioning paperclips for fixing the PCB are placed in the guide groove. The positioning paperclips include a positioning slider and a shaped spring. The two ends of the positioning slider are respectively provided with a first protrusion and a second protrusion. The first protrusion has a spring groove. The shaped spring is a fork-shaped part formed by bending metal wire. The shaped spring includes a helical part and two rod-shaped parts. The helical part of the shaped spring extends into the spring groove, and the two rod-shaped parts extend into the through grooves on both sides of the guide groove and abut against the stepped surfaces. The second protrusion has a positioning post, and the side of the positioning post has an elastic protrusion structure. The upper surface of the fixture template has a shallow groove that intersects the guide groove in a cross shape. The lower surface of the fixture template has strip grooves on both sides of the guide groove. The strip grooves are staggered and connected to the shallow grooves to form through grooves. The bottom surface of the strip grooves, staggered from the shallow grooves, forms a stepped surface.

2. A PCB fixture according to claim 1, characterized in that, The bottom surface of the groove is provided with a number of heat dissipation grooves, and the bottom surface of the heat dissipation grooves is provided with a number of heat dissipation through holes.

3. A PCB fixture according to claim 2, characterized in that, The bottom surface of the heat sink is provided with several support protrusions, which avoid the heat dissipation through holes.

4. A PCB fixture according to claim 1, characterized in that, The first protrusion and the second protrusion respectively abut against the two ends of the guide groove.

5. A PCB fixture according to claim 1, characterized in that, Both ends of the positioning slide are provided with sliding parts, and both ends of the guide groove extend outward into limiting grooves, with the sliding parts slidably connected to the limiting grooves.

6. A PCB fixture according to claim 5, characterized in that, The lower surface of the fixture template is provided with deep grooves at both ends of the guide groove. The ends of the deep grooves and the guide grooves overlap, and the deep grooves and the guide grooves form a limiting slide groove.

7. A PCB fixture according to claim 1, characterized in that, The elastic protrusion structure includes two symmetrically arranged locking blocks connected by an elastic element. The positioning post has an insertion groove and outlets on both sides that communicate with the side wall of the positioning post. The elastic protrusion structure is placed into the insertion groove and the locking blocks extend out from the outlets. The upper surface of the locking blocks has a limiting protrusion.

8. A PCB fixture according to claim 7, characterized in that, The top surface of the positioning post is provided with a circular groove that communicates with the insertion slot, and a sealing cap is installed in the circular groove.

9. A PCB fixture according to claim 7, characterized in that, The two locking blocks have an arc-shaped structure at their opposite ends, and the arc is consistent with the side arc of the positioning post. The top and bottom corners of the opposite ends of the two locking blocks are chamfered.

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