Multi-point supported magnetic pogo pin device for chip mounter

Abstract

The utility model discloses a kind of magnetic ejector pin devices of multi-point support for chip mounter in the adjusting device field, comprising: annular support, its surface is equipped with multiple annular waist type holes;Multiple cylindrical ejector pins, be set in the annular waist type hole, for supporting board card local hollow area;L-shaped support, one end is equipped with vertical waist type hole, connect with the annular support by the vertical waist type hole, for adjusting the vertical height of the annular support;Another end is equipped with horizontal waist type hole, and support base is connected by the horizontal waist type hole, for adjusting the horizontal distance of annular support relative to the support base. This scheme satisfies the multi-point support demand of large-size board card in local hollow area, while realizing multi-point support function, its overall floor area equivalent to single traditional magnetic ejector pin is installed on lifting platform, occupies small area, multidirectional flexible adjustment and high stability.

Description

Technical Field

[0001] This utility model relates to the field of adjustment devices, specifically a multi-point supported magnetic ejector pin device for a chip mounter. Background Technology

[0002] With the rapid development of intelligent manufacturing and the electronics industry, the demand for ultra-large substrates in fields such as LED lighting, giant screens, and automotive components has surged, and the size of PCB boards mounted by pick-and-place machines is also constantly increasing. However, to avoid the boards becoming too bulky, the thickness of large-size PCB boards is usually kept at the minimum level to meet the circuit layout requirements, thus forming a large-area thin board structure.

[0003] When mounting large, thin PCB boards using a pick-and-place machine, the boards are prone to bending and deformation due to gravity. Magnetic pins are typically placed on the machine's lifting platform to support the bent areas. It is particularly noteworthy that, due to operational constraints, these large PCB boards often have one or more cutout areas. These cutout areas are even more susceptible to significant bending and deformation during mounting due to their own weight, thus requiring multiple stable and reliable support points underneath them.

[0004] However, existing traditional magnetic ejector pin technology has the following significant limitations, making it difficult to meet the above requirements:

[0005] 1. Insufficient Multi-Point Support Capacity: Traditional magnetic ejector pins use a structure of "one support point corresponding to one independent magnetic base." Each base occupies a certain area. When multiple support points need to be densely arranged in a small local cutout area of ​​a PCB board, the total area occupied by multiple independent bases is often too large. This makes it impossible to reasonably and effectively arrange the required number of magnetic ejector pins in this limited space, thus failing to meet the urgent need for multi-point support in local cutout areas. 2. Poor Reliability of Ring Magnet Fixing: The ring magnet inside the traditional magnetic ejector pin base sleeve is usually fixed by magnetic attraction to the inner wall of the sleeve or by adhesive. This fixing method has serious hidden dangers. 3. Risk of Detachment: During use, the ring magnet may detach from the base sleeve due to vibration, impact, or changes in magnetic force. 4. Risk of Adsorption to the Platform: Since the pick-and-place machine lifting platform is usually made of magnetic carbon steel (such as 45# steel, Q235A), once the ring magnet detaches from the sleeve, it is very easy to be adsorbed onto the high-precision surface of the lifting platform, causing equipment contamination, magnet loss, and subsequent usage problems. 4. Base sleeves are prone to damaging high-precision platforms: Most existing magnetic ejector pin base sleeves are made of stamped steel. During manufacturing or subsequent frequent use, their bottom surface is prone to developing burrs, rough edges, or wear. The placement machine's lifting platform requires extremely high planar precision (typically below 50 micrometers). When the bottom surface of a steel base sleeve with burrs or rough edges (its hardness is similar to that of the lifting platform material) is placed directly on the lifting platform's surface, it is extremely easy to scratch or wear this high-precision surface, causing irreversible damage and posing a risk of significant economic losses.

[0006] In summary, existing magnetic ejector pins, when addressing the multi-point support requirements of large-size thin PCBs with localized cutouts, are limited by the footprint of their independent bases, making it difficult to achieve a dense arrangement of support points. This restricts the stable and reliable application of traditional magnetic ejector pins in complex mounting scenarios, especially in the mounting of large-size PCBs with special cutout areas. Therefore, an improved magnetic ejector pin device is urgently needed to overcome the aforementioned technical shortcomings. Utility Model Content

[0007] The purpose of this utility model is to overcome the problems existing in the prior art and provide a multi-point supported magnetic ejector pin device for a pick-and-place machine. To achieve the above objective, this utility model provides the following technical solution:

[0008] A multi-point supported magnetic ejector pin device for a pick-and-place machine, comprising:

[0009] An annular support member, the surface of which is provided with multiple annular waist-shaped holes;

[0010] Multiple cylindrical tops are set inside the annular waist-shaped hole to support the partially hollowed-out area of ​​the plate;

[0011] The L-shaped support has a vertical waist-shaped hole at one end, which is connected to the annular support through the vertical waist-shaped hole to adjust the vertical height of the annular support; the other end has a horizontal waist-shaped hole, which is connected to a support base to adjust the horizontal distance between the annular support and the support base.

[0012] Preferably, the cylindrical top is mounted on the annular support member using a ram's nut and a hexagonal nut in combination. The cylindrical top includes a threaded section, and the ram's nut and the hexagonal nut are respectively screwed onto the threaded section.

[0013] Preferably, the L-shaped support member has a counterweight at one end of the support base; the counterweight is assembled into the horizontal waist-shaped hole by screws to prevent the magnetic pin device from tipping over.

[0014] Preferably, the support base includes a base sleeve, an annular magnet, and an annular rubber buffer pad.

[0015] The base sleeve has a cylindrical cavity inside;

[0016] The ring magnet is attracted to the cylindrical cavity of the base sleeve by magnetic attraction;

[0017] A ring-shaped rubber buffer pad is placed below the ring magnet, with its upper surface in contact with the ring magnet.

[0018] Preferably, the support base further includes a copper base plate located at the bottom of the cavity of the base sleeve. The top of the base plate is in contact with the lower surface of the annular rubber buffer pad, and the bottom plane protrudes from the outer end face of the base sleeve.

[0019] Preferably, the threaded section is an M5 threaded section, and the hexagonal nut is an M5 hexagonal nut.

[0020] Preferably, the center of the base plate is set as a T-shaped structure recessed into the cavity of the base sleeve, and the L-shaped support, the base sleeve and the base plate are connected in sequence by screws, and the nuts adapted to the screws are set in the groove of the T-shaped structure.

[0021] Preferably, the inner side of the annular support is provided with a downwardly extending connector, which is screwed into the vertical waist-shaped hole of the L-shaped support.

[0022] The technical solution of this utility model can achieve the following effects: 1. Multi-point support and compact design: The magnetic pin is equipped with multiple cylindrical heads (support points) with flexible adjustable positions to meet the multi-point support requirements of large-size plates in partially hollowed-out areas. While achieving multi-point support, its overall footprint on the lifting platform is equivalent to that of a single traditional magnetic pin, resulting in a small footprint. 2. Multi-directional flexible adjustment and stability: In the height direction, two flexibly adjustable structures are provided through the vertical waist-shaped hole of the L-shaped support and the threaded section of the cylindrical head; in the horizontal direction, one flexibly adjustable structure is provided through the horizontal waist-shaped hole of the L-shaped support. In addition, a counterweight is added to the L-shaped support in the horizontal direction to ensure that the entire magnetic pin remains stable and does not tip over even when a large range of horizontal adjustments is made at the top. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the multi-point supported magnetic ejector device of this utility model.

[0024] Figure 2 This is a cross-sectional structural diagram of the multi-point supported magnetic ejector device of this utility model.

[0025] In the diagram: 1. Annular support; 11. Annular waist-shaped hole; 2. Cylindrical top; 21. Threaded section; 3. Support base; 31. Base sleeve; 32. Annular magnet; 33. Buffer pad; 34. Base plate; 4. L-shaped support; 5. Counterweight. Detailed Implementation

[0026] 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.

[0027] This utility model provides a multi-point supported magnetic ejector pin device for a pick-and-place machine, such as... Figure 1 As shown, it includes:

[0028] The annular support 1 has a plurality of annular waist-shaped holes 11 on its surface. The inner side of the annular support 1 has a downwardly extending connector, which is screwed to the vertical waist-shaped hole of the L-shaped support 4.

[0029] Multiple cylindrical tops 2 are disposed in the annular waist-shaped hole 11 to support the partially hollowed-out area of ​​the plate; the cylindrical tops 2 are disposed on the annular support 1 through the cooperation of horn nuts and hexagonal nuts, and the cylindrical tops 2 include a threaded section 21, on which the horn nuts and hexagonal nuts are respectively screwed;

[0030] The L-shaped support 4 has a vertical waist-shaped hole at one end, which is connected to the annular support 1 to adjust the vertical height of the annular support 1; the other end has a horizontal waist-shaped hole, which is connected to the support base 3 to adjust the horizontal distance between the annular support 1 and the support base 3; a counterweight 5 is provided at the tail end of the L-shaped support 4 at one end of the support base 3; the counterweight 5 is assembled to the horizontal waist-shaped hole by screws to prevent the magnetic pin device from tipping over.

[0031] The threaded section 21 is an M5 threaded section, and the hexagonal nut is also an M5 hexagonal nut, located at the lower part of the annular support. The threaded section 21 allows for fine-tuning in the height direction. Simultaneously, the annular support and the L-shaped support 4 can also be adjusted in the height direction via screws and vertical slotted holes. The combination of these two adjustment methods significantly increases the overall adjustment margin, i.e., the effective adjustment stroke, in the height direction of the device, thereby enhancing its ability to support different height positions.

[0032] Furthermore, such as Figure 2 As shown, the support base 3 includes a base sleeve 31, an annular magnet 32, an annular rubber buffer pad 33, and a copper base plate 34.

[0033] The base sleeve 31 has a cylindrical cavity inside;

[0034] The annular magnet 32 ​​is magnetically attracted to the cylindrical cavity of the base sleeve 31;

[0035] An annular rubber buffer pad 33 is disposed below the annular magnet 32, and its upper surface is in contact with the annular magnet 32.

[0036] A copper base plate 34 is located at the bottom of the cavity of the base sleeve 31. The top of the base plate 34 is in contact with the lower surface of the annular rubber buffer pad 33, and the bottom plane protrudes from the outer end face of the base sleeve 31. The center of the base plate 34 is set with a T-shaped structure that is recessed into the cavity of the base sleeve 31. The L-shaped support 4, the base sleeve 31 and the base plate 34 are connected in sequence by screws, and the nuts that are compatible with the screws are located in the groove of the T-shaped structure.

[0037] Preferably, the L-shaped support is fixed to the base sleeve by a hexagonal head M4 screw. The upper surface of the buffer pad is in contact with the annular magnet, while the lower surface is in contact with the copper support base. The purpose of the buffer pad is to effectively absorb the locking force when the L-shaped support is locked to the base sleeve by the hexagonal head M4 screw, preventing the hard and brittle annular magnet from being damaged by the copper support base below due to excessive locking force. The copper base plate has a bottom plane that protrudes from the bottom surface of the base sleeve. This design allows the bottom plane of the support base to directly contact the high-precision lifting platform plane, which has a dual advantage. First, it protects the platform surface: the hardness of copper is significantly lower than that of steel lifting platforms, effectively preventing scratches or wear on the platform surface (the platform surface precision is usually required to be below 50 micrometers). Second, it provides stable support: as a solid metal, copper has sufficient rigidity and strength and is not prone to significant plastic deformation, ensuring the stability and reliability of the support. The T-shaped groove of the base plate is machined into a regular hexagonal prism cavity to precisely fit an M4 nut that matches an M4 screw, thus achieving a firm fixation between the L-shaped support and the base sleeve.

[0038] In summary, the structure of this utility model has the following beneficial effects:

[0039] 1. Multi-point support and compact design: This magnetic pin is equipped with multiple cylindrical tops (support points) that can be flexibly adjusted to meet the multi-point support needs of large-size boards in partially hollowed-out areas. While achieving the multi-point support function, its overall footprint on the lifting platform is equivalent to that of a single traditional magnetic pin, thus occupying a small area.

[0040] 2. Multi-directional Flexible Adjustment and Stability: In the vertical direction, the vertical oblong hole of the L-shaped support and the threaded section of the cylindrical top provide two points of flexible adjustment; in the horizontal direction, the horizontal oblong hole of the L-shaped support provides one point of flexible horizontal adjustment. Furthermore, a counterweight is added to the L-shaped support in the horizontal direction to ensure that the entire magnetic pin remains stable and does not tip over, even during large-scale horizontal adjustments at the top.

[0041] 3. Reliable Fixing and Platform Protection: Magnet Fixing: The ring magnet fixing method ensures that it is firmly attached to the lifting platform surface without the risk of falling off; Base Protection: The steel base sleeve of the magnetic pin is equipped with a detachable copper base plate, which can prevent burrs on the bottom of the steel base sleeve from scratching or abrading the high-precision machined lifting platform surface.

[0042] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A multi-point supported magnetic ejector pin device for a pick-and-place machine, characterized in that, include: An annular support member (1) has multiple annular waist-shaped holes (11) on its surface. Multiple cylindrical tops (2) are set inside the annular waist-shaped hole (11) to support the partially hollowed-out area of ​​the plate; The L-shaped support member (4) has a vertical waist-shaped hole at one end, which is connected to the ring support member (1) through the vertical waist-shaped hole to adjust the vertical height of the ring support member (1); the other end has a horizontal waist-shaped hole, which is connected to the support base (3) to adjust the horizontal distance between the ring support member (1) and the support base (3).

2. The multi-point supported magnetic ejector device according to claim 1, characterized in that, The cylindrical top (2) is mounted on the annular support (1) by means of a ram's nut and a hexagonal nut. The cylindrical top (2) includes a threaded section (21), and the ram's nut and the hexagonal nut are screwed onto the threaded section (21).

3. The multi-point supported magnetic ejector device according to claim 1, characterized in that, The L-shaped support (4) has a counterweight (5) at the tail end of one end of the support base (3); the counterweight (5) is assembled into the horizontal waist-shaped hole by screws to prevent the magnetic pin device from tipping over.

4. The multi-point supported magnetic ejector device according to claim 1, characterized in that, The support base (3) includes a base sleeve (31), an annular magnet (32), and an annular rubber buffer pad (33). The base sleeve (31) has a cylindrical cavity inside; The ring magnet (32) is attracted to the cylindrical cavity of the base sleeve (31) by magnetic attraction; An annular rubber buffer pad (33) is disposed below the annular magnet (32), with its upper surface in contact with the annular magnet (32).

5. The multi-point supported magnetic ejector device according to claim 4, characterized in that, The support base (3) also includes a copper base plate (34) located at the bottom of the cavity of the base sleeve (31). The top of the base plate (34) is in contact with the lower surface of the annular rubber buffer pad (33), and the bottom plane protrudes from the outer end face of the base sleeve (31).

6. The multi-point supported magnetic ejector device according to claim 2, characterized in that, The threaded section (21) is an M5 threaded section, and the hexagonal nut is an M5 hexagonal nut.

7. The multi-point supported magnetic ejector device according to claim 5, characterized in that, The center of the base plate (34) is set as a T-shaped structure recessed into the cavity of the base sleeve (31). The L-shaped support (4), the base sleeve (31) and the base plate (34) are connected in sequence by screws, and the nuts that are compatible with the screws are set in the groove of the T-shaped structure.

8. The multi-point supported magnetic ejector device according to any one of claims 1-7, characterized in that, The inner side of the annular support (1) is provided with a downwardly extending connector, which is screwed into the vertical waist-shaped hole of the L-shaped support (4).

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