Printed circuit board clamp
Through the innovative design of the sliding fixing unit and the clamping unit, the problems of cumbersome adjustment and deformation of circuit board clamps are solved, achieving the effect of rapid adaptation and efficient protection of circuit boards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-03-24
AI Technical Summary
In the existing technology, when handling circuit boards of different specifications, the adjustment steps of the circuit board fixture are cumbersome and time-consuming, which affects the efficiency of process connection in mass production scenarios, and the rigid clamping causes the circuit board to deform.
By employing a sliding fixed unit and a clamping unit, combined with structures such as elastic elements, extrusion elements, and hinge rods, flexible clamping and adaptive adjustment are achieved. The elastic elements disperse the clamping pressure, the extrusion elements compensate for thickness differences, and the hinge rods offset displacement, forming a composite mechanism of elastic clamping and rigid support.
It enables rapid adaptation to circuit boards of different sizes, avoids the cumbersome operation of traditional fixtures, protects circuit boards from deformation and damage, and improves production efficiency and safety.
Smart Images
Figure CN224037574U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic equipment processing technology, and in particular to a printed circuit board fixture. Background Technology
[0002] A circuit board clamp is a tool used to fix and support circuit boards, designed to ensure that the circuit board can maintain a stable position during the manufacturing, testing, and repair processes, facilitating various operations.
[0003] Generally, circuit board clamps have the following characteristics and functions: precise positioning: they can accurately fix the circuit board so that it will not shift during operation, ensuring the accuracy of the operation; good support: they provide uniform support for the circuit board and prevent the circuit board from deforming due to its own weight or external forces.
[0004] Traditional mechanical clamping devices in the present technology mostly adopt screw locking or lever pressing structures, which require manual adjustment of multiple locking components. When processing circuit boards of different specifications, operators need to repeatedly adjust the clamping position and force, which is cumbersome and time-consuming, especially affecting the efficiency of process connection in mass production scenarios. Utility Model Content
[0005] The main purpose of this utility model is to provide a printed circuit board clamp that aims to solve the problem of circuit board deformation caused by rigid clamping in the prior art.
[0006] To achieve the above objectives, this utility model provides a printed circuit board fixture, including a base, on which a plurality of fixing units are slidably disposed, and on which a platform for accommodating a circuit board is provided. The base is also provided with a clamping unit, which includes a jaw for clamping or supporting the circuit board.
[0007] Optionally, the fixing unit includes a fixing seat, which is slidably disposed with the base via a guide rail, and a fixing plate is also slidably disposed on the fixing seat, with a locking head provided at the end of the fixing plate.
[0008] Optionally, a buckle matching the card head is provided on one side of the platform.
[0009] Optionally, the bottom of the fixing plate is provided with an adhesive strip and an extrusion strip, and the fixing plate is also provided with an extrusion member, the output end of which is connected to the extrusion strip.
[0010] Optionally, the clamping unit further includes a clamping seat, on which a slider is slidably disposed, and clamping plates are fixedly connected to both sides of the slider. Claws are hinged to the inner sides of the two clamping plates, one end of the claws is connected to the jaw, and the other end is connected to an elastic element.
[0011] Optionally, the two ends of the elastic element are connected to the claw and the clamping plate, respectively.
[0012] Optionally, the clamping unit further includes an adapting rod, both ends of which are hinged to hinge rods, and the two hinge rods are respectively hinged to the clamping plates at both ends of the clamping seat.
[0013] Optionally, a lead screw is provided in the middle of the adapting rod, and the free end of the lead screw moves through the platform and abuts against the lower end surface of the circuit board.
[0014] Optionally, the platform may also be provided with plastic strips.
[0015] Optionally, a number of support rods are provided below the platform.
[0016] This utility model proposes a printed circuit board clamp, which is fixed to the clamping plate by an elastic element. When the jaw contacts the circuit board, the deformation of the elastic element adaptively disperses the clamping pressure to avoid local overload. The composite buffer layer (such as an adhesive strip) absorbs the contact impact through the adhesive strip at the bottom of the fixed plate, and the extrusion element drives the extrusion strip to dynamically compensate for the difference in PCB thickness, forming primary flexible protection. The clamping unit is linked to the clamping plate by the hinge rods at both ends of the adapting rod, forming a four-bar linkage mechanism to offset the displacement caused by vibration or thermal expansion in real time. At the same time, the lead screw abuts against the lower end face of the circuit board to finely adjust the support height and correct bending deformation, forming a dual protection of "elastic clamping + rigid support", which solves the problem of circuit board deformation caused by rigid clamping in the prior art. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the automatic transfer system of this utility model;
[0018] Figure 2 This is a schematic diagram of the assembly platform of this utility model;
[0019] Figure label:
[0020] 1-Base, 2-Fixing unit, 3-Platform, 4-Clamping unit, 5-Guard, 6-Plastic strip;
[0021] 21-Fixing base, 22-Fixing plate, 23-Clip head, 24-Snap buckle, 25-Glue strip, 26-Extrusion strip, 27-Extruded part;
[0022] 31-Support rod;
[0023] 41-Clamping seat, 42-Slider, 43-Clamping plate, 44-Claw, 45-Elastic element, 46-Adaptive rod, 47-Hinge rod, 48-Lead screw.
[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0025] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean 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.
[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0029] Example:
[0030] As attached Figure 1 With appendix Figure 2As shown, this embodiment provides a printed circuit board fixture, including a base 1, on which a plurality of fixing units 2 are slidably disposed, and on the plurality of fixing units 2 are provided a platform 3 for accommodating the circuit board. The base 1 is also provided with a clamping unit 4, which includes a jaw 5 for clamping or supporting the circuit board.
[0031] It should be noted that traditional mechanical clamping devices in existing technologies mostly use screw locking or lever pressing structures, requiring manual adjustment of multiple locking components. When processing circuit boards of different specifications, operators need to repeatedly adjust the clamping position and force, which results in cumbersome adjustment steps and long time consumption, especially affecting the efficiency of process connection in mass production scenarios.
[0032] Based on the above problems, this embodiment provides a printed circuit board fixture that enables rapid position adjustment through a sliding mechanism. By simply sliding the fixing unit 2 along the base 1, it can adapt to circuit boards of different sizes, avoiding the tedious steps of repeatedly tightening multiple bolts required by traditional fixtures and significantly shortening the adjustment time.
[0033] It should be noted that the jaws 5 are preferably made of rubber or silicone, but plastic buffer structures can also be used. When the jaws 5 contact the circuit board, the elastic deformation can distribute the clamping pressure, avoiding deformation of the board surface or damage to components caused by direct pressure from rigid jaws. Specifically, when clamping thin circuit boards, the flexible contact surface of the jaws 5 can adapt to the unevenness of the circuit board surface, apply force evenly, and prevent local overload.
[0034] Furthermore, the sliding fixing unit 2 achieves "multi-purpose clamping" through its adjustable position. The multi-point sliding capability of the fixing unit 2 along the base 1 allows the platform 3 to dynamically expand or shrink, adapting to irregularly shaped boards or extra-long / extra-wide circuit boards. Specifically, when processing rectangular, L-shaped, or irregularly edged circuit boards, the positions of multiple fixing units 2 can be adjusted to match the edge of the platform 3 with the outline of the circuit board, and then the clamps 5 clamp from multiple directions to ensure stable fixation.
[0035] In some embodiments, the sliding arrangement can be achieved using an electric guide rail or a slide rail structure.
[0036] In some embodiments, if the circuit board specifications need to be changed frequently, the sliding unit can be quickly aligned to a preset position. More preferably, semi-automatic positioning is achieved through scale markings, thereby improving the overall efficiency of the production line.
[0037] In this embodiment, the fixing unit 2 includes a fixing base 21, which is slidably mounted on the base 1 via a guide rail. A fixing plate 22 is also slidably mounted on the fixing base 21, and a locking head 23 is provided at the end of the fixing plate 22. A buckle 24 matching the locking head 23 is provided on one side of the platform 3. In this embodiment, the bottom of the fixing plate 22 is provided with an adhesive strip 25 and an extrusion strip 26, and an extrusion member 27 is also provided on the fixing plate 22. The output end of the extrusion member 27 is connected to the extrusion strip 26.
[0038] It should be noted that the fixing unit 2 further includes a slidable fixing plate 22 on the fixing base 21, with a locking head 23 at its end. The sliding capability of the fixing plate 22 can be finely adjusted according to the thickness or edge shape of the circuit board. Specifically, when clamping a circuit board with protruding components, the fixing plate 22 can slide outward so that the locking head 23 avoids the component area and only contacts the unobstructed edge of the circuit board. For irregularly shaped boards (such as notches or arc edges), the fixing plate 22 can adjust its angle or extension length to ensure that the locking head 23 effectively engages with the edge of the circuit board.
[0039] In some embodiments, the clip 23 and the latch 24 can cooperate to act as a locking structure to fix the circuit board on the platform 3 and prevent relative displacement of the circuit board on the end face.
[0040] Understandably, the bottom of the fixing plate 22 is provided with an adhesive strip 25 and an extrusion strip 26, and the extrusion strip 26 is driven to move by the extrusion member 27. The adhesive strip 25 directly contacts the edge of the circuit board, providing flexible cushioning to prevent scratches on the board surface or damage to components caused by hard contact. Under the drive of the extrusion member 27, the extrusion strip 26 can apply uniform pressure to the adhesive strip 25 to ensure reasonable distribution of clamping force.
[0041] In some embodiments, when the circuit board thickness is uneven, the extruder 27 dynamically compensates for the clamping gap in different areas by adjusting the displacement of the extrusion bar 26, avoiding local overpressure. The above-mentioned composite buffer mechanism not only protects the circuit board, but also replaces the traditional manual pressure with mechanical drive, reducing the subjective judgment error of the operator and further improving the clamping safety.
[0042] In some embodiments, the extruder 27 is a cylinder or an electric push rod.
[0043] In this embodiment, the clamping unit 4 further includes a clamping seat 41, on which a slider 42 is slidably disposed. Clamping plates 43 are fixedly connected to both sides of the slider 42. Claws 44 are hinged to the inner sides of the two clamping plates 43. One end of each claw 44 is connected to the jaw 5, and the other end is connected to an elastic element 45. In this embodiment, both ends of the elastic element 45 are connected to the claw 44 and the clamping plate 43, respectively.
[0044] Understandably, direct pressure from traditional rigid grippers can easily lead to localized deformation of the circuit board or damage to components. However, the combination of gripper 44 and elastic element 45 achieves adaptive clamping. Specifically, one end of gripper 44 is connected to the jaw 5, and the other end is hinged to the clamping plate 43 via elastic element 45. When the jaw 5 contacts the circuit board, the elastic element 45 absorbs part of the clamping force through deformation, forming a dynamic pressure buffer. When clamping thin circuit boards, after the gripper 44 is subjected to the reaction force of the circuit board, the compression of the elastic element 45 increases, automatically reducing the actual applied clamping force and avoiding overload. Conversely, for thick plates or rigid substrates, the elastic element 45 only deforms slightly, ensuring sufficient clamping stability. The two ends of the elastic element 45 are connected to the gripper 44 and the clamping plate 43 respectively, forming a closed-loop feedback mechanism: after the clamping plate 43 moves and adjusts its initial position via slider 42, the preload of the elastic element 45 can be precisely controlled, thereby achieving linear adjustment of the clamping force.
[0045] In some embodiments, the elastic element 45 is a spring.
[0046] In this embodiment, the clamping unit 4 further includes an adapting rod 46, both ends of which are hinged to a hinge rod 47, and the two hinge rods 47 are respectively hinged to the clamping plates 43 at both ends of the clamping seat 41.
[0047] In this embodiment, a lead screw 48 is provided in the middle of the adaptation rod 46, and the free end of the lead screw 48 moves through the platform 3 and abuts against the lower end surface of the circuit board.
[0048] In some embodiments, the hinge rods 47 at both ends of the adapting rod 46 are respectively connected to the clamping plate 43 to form a four-bar linkage mechanism. When the clamping unit 4 is subjected to external vibration or the circuit board position is offset, the adapting rod 46 adjusts the relative position of the clamping plates 43 on both sides in real time through the transmission of the hinge rods 47.
[0049] Specifically, during automated welding, if the circuit board experiences slight displacement due to thermal expansion, the adjusting rod 46, after one side of the clamping plate 43 is pushed, drives the other side of the clamping plate 43 to move synchronously in the opposite direction, offsetting the displacement error and maintaining clamping symmetry. Furthermore, the lead screw 48 in the middle of the adjusting rod 46 can further fine-tune the support height: the free end of the lead screw 48 abuts against the lower end face of the circuit board, and rotating the lead screw 48 adjusts the support point position, compensating for bending deformation of the circuit board caused by gravity or external processing forces. This composite mechanism of "elastic clamping + rigid support" ensures both flexible dynamic adaptation of the clamping and locks the absolute position of the circuit board through mechanical linkage, making it particularly suitable for high-precision optical inspection or micron-level surface mount technology (SMT) processes.
[0050] It is also understandable that when the circuit board is subjected to excessive vertical pressure, it simultaneously generates axial pressure on the lead screw 48, which in turn causes the adaptor rod 46 to move upward, and the two sliders 42 tend to move relative to each other, so as to increase the support force of the latch 5 on the circuit board.
[0051] In some embodiments, the platform 3 is further provided with a plastic strip 6. The plastic strip 6 is in direct contact with the edge of the circuit board, and its elastic modulus is much lower than that of metal or hard plastic, which can absorb the impact energy during the clamping process.
[0052] In some embodiments, a plurality of support rods 31 are provided below the platform 3. The support rods 31 are vertically distributed at key stress points at the bottom of the platform 3, and are made of high-rigidity material to form a multi-point support network. Specifically, during welding or drilling processes, the support rods 31 directly support the platform 3, dispersing the vertical external force borne by the PCB to the base 1, thereby avoiding warping or breakage of the board surface caused by local sinking.
[0053] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A printed circuit board fixture, characterized in that, The device includes a base on which several fixing units are slidably disposed. Each fixing unit has a platform for accommodating a circuit board. The base is also provided with a clamping unit, which includes a jaw for clamping or supporting the circuit board.
2. A printed circuit board fixture as described in claim 1, characterized in that, The fixing unit includes a fixing seat, which is slidably mounted on a base via a guide rail. A fixing plate is also slidably mounted on the fixing seat, and a clip is provided at the end of the fixing plate.
3. A printed circuit board fixture as described in claim 2, characterized in that, One side of the platform is provided with a buckle that matches the card head.
4. A printed circuit board fixture as described in claim 2, characterized in that, The bottom of the fixing plate is provided with an adhesive strip and an extrusion strip, and the fixing plate is also provided with an extrusion component, the output end of which is connected to the extrusion strip.
5. A printed circuit board fixture as described in claim 1, characterized in that, The clamping unit also includes a clamping seat, on which a slider is slidably disposed. Clamping plates are fixedly connected to both sides of the slider. Claws are hinged to the inner sides of the two clamping plates. One end of the claw is connected to the jaw, and the other end is connected to an elastic element.
6. A printed circuit board fixture as described in claim 5, characterized in that, The two ends of the elastic element are respectively connected to the claw and the clamping plate.
7. A printed circuit board fixture as described in claim 5, characterized in that, The clamping unit also includes an adapting rod, both ends of which are hinged to hinge rods, and the two hinge rods are respectively hinged to the clamping plates at both ends of the clamping seat.
8. A printed circuit board fixture as described in claim 7, characterized in that, A lead screw is provided in the middle of the adapting rod, and the free end of the lead screw moves through the platform and abuts against the lower end surface of the circuit board.
9. A printed circuit board fixture as described in claim 1, characterized in that, The platform is also equipped with plastic strips.
10. A printed circuit board fixture as described in claim 1 or 9, characterized in that, Several support rods are installed below the platform.