TWI545993B - Static discharge grounder - Google Patents

Description

Electrostatic discharge grounding device

This invention relates generally to the field of electrostatic discharge and, more particularly, to an electrostatic discharge grounding apparatus.

To date, a number of prior art have documented the use and application of various specific moving or fixed grounding devices in terms of electrostatic charge or electrostatic grounding.

No. 2,125,378 describes a grounding device that can be attached to a metal portion of a vehicle to discharge any accumulated electrostatic charge from the vehicle to the surface. No. 6,327,131 B1 describes a transport device comprising a conductive cart, a conductive pad coupled to the conductive cart, and a grounding device coupling the conductive pad to the cable. No. 6,357,767 describes a grounding device attached to the axle of a wheel to discharge any accumulated electrostatic charge from the mobile device to the ground.

In electrostatically sensitive manufacturing environments, the grounding of carts, trams, chairs, and other moving or non-moving objects in a typical electrostatic protection area can typically be achieved by the use of static dissipative or electrically conductive swinging casters, wheels or rollers. However, electrostatic grounding swinging casters, wheels or rollers have certain drawbacks in actual use. Since most of the ground is not flat in an actual on-site production environment, it is necessary to attach two or more units of the grounding device to each of the moving carts, trams, and chairs to effectively ground them. This will result in high costs and is therefore not suitable for use in a typical large-scale production environment. In addition, the direct accumulation of dirt or dust particles on the ground contact surface of the grounding device will cause a change in its electrical conductivity and thus affect the overall grounding resistance value, which will make monitoring and control of the electrostatic control process very difficult and challenging. Task.

Chinese utility model patent ZL200720028685.6 discloses a series structure The bio-discharge shoe includes a discharge electrode 22 disposed on the sole 2, a guide electrode 31 disposed on the midsole 3, and a collector 41 disposed on the fascia 4, the electrodes being connected in series. The discharge electrode 22 on the sole 2 is of a "work" shape and is disposed in the electrode hole 21 of the sole 2 and penetrates the sole 2. The discharge end 221 of the discharge electrode 22 is in contact with the ground, and the connection end 222 is in contact with the lead electrode 31. The lead electrode 31 on the midsole 3 is fixed in the electrode hole 32 of the midsole 3 and corresponds to the discharge electrode 22 of the sole 2. The collector 41 on the mat 4 is sewn to the mat 4 with flexible wires, and the lead electrodes 31 on the midsole 3 are connected. The upper 1, the sole 2, the midsole 3, and the lining 4 are bonded together by an adhesive process.

However, the tandem structure of the bio-discharge shoe not only requires a large number of components, a special shape of the component, but also needs to be manufactured by a special styling tool, and the entire series structure is complicated in design, and is only suitable for shoes having a sole, a midsole and a cushion. Classes cannot be applied to carts, trams, chairs, and other similar moving or non-moving objects.

These shortcomings listed above make it more difficult to manage and control electrostatic charge in a typical electrostatic sensitive component manufacturing industry, especially in large scale manufacturing environments. Therefore, further research and development is needed to find an alternative device that is not only simple to manufacture, inexpensive, and durable, but also has dust-proof grounding properties.

It is a primary object of the present invention to provide an electrostatic discharge grounding device that is not only simple to manufacture, inexpensive, and durable.

An electrostatic discharge grounding device according to the present invention, comprising a block member and a conductive elastic wire, the top surface and the bottom surface of the block member respectively having at least two punch-through holes, the conductive elastic wires passing through a through hole Another through hole passes through the at least two through holes to form an arc that protrudes at least on the bottom surface of the block to serve as a soft surface contact with static dissipative or conductive ground.

Preferably, the block member includes a plurality of through holes at a top surface and a bottom surface thereof, wherein the conductive elastic wires pass through the plurality of through holes from one through hole to another through holes to form at least The top surface and the bottom surface of the block project a plurality of arcs, and the conductive elastic wires are horizontally stretched in a circular pattern on the top surface and the bottom surface.

Preferably, a central through hole is located at a center of gravity of the block member and the remaining through holes are equidistantly distributed on a ring pattern surrounding the center of gravity, wherein the conductive elastic wire passes through the central through hole at both ends, and Each of the through holes has the conductive elastic wire passing through the through hole from the top surface to the bottom surface and passing through the through hole from the bottom surface to the top surface.

Preferably, the conductive elastic wire forms a circular, elliptical, square, rectangular, hexagonal or irregularly shaped continuous ring on the top surface, the bottom surface or the top surface and the bottom surface of the block member. pattern.

Preferably, the conductive elastic wire includes at least a first conductive elastic wire and a second conductive elastic wire electrically insulated from each other, the plurality of through holes including at least a first group of through holes and a second group of through holes, the first Conductive elastic wires pass through the first set of through holes from one of the first set of through holes to the other of the first set of through holes, and the second conductive elastic wires pass from one of the second set of through holes to Another of the second set of through holes passes through the second set of through holes.

Preferably, the block member is a metal block member into which an insulating structure is inserted, the insulating structure being composed of a circular plastic plate having protruding cylindrical spikes.

Preferably, the conductive elastic wire is attached with a plurality of coiled tubing to generate a freely rotating motion when the conductive elastic wire slides on the ground.

Preferably, the conductive elastic wire comprises a metal spiral made of a metal wire having a thickness of 0.1 mm to 1 mm, wherein the spiral diameter is 2 mm to 10 mm.

Preferably, the metal helix has a hook at one end and a closed loop or buckle at the other end to attach the electrostatic discharge grounding device to a device that requires grounding.

Preferably, the block is a circular metal block having a flat top surface and a flat bottom surface having a diameter ranging from 20 mm to 200 mm, and the circular metal block has a height ranging from 3 mm to 50 mm.

Preferably, the block is a shoe and the conductive elastic strand is attached to the ground of the shoe.

It is a very unique design to pass the conductive elastic wire from one through hole to the other through the hole. Thus, the present invention forms a soft surface contact that is accessible to the ground by passing elastic conductive wires through the through holes. Therefore, the invention is simple to manufacture, low in cost, and does not require a ball shaft Bearings, screws, bolts and nuts, adhesives and rivets.

11‧‧‧Circular pieces

12‧‧‧through hole

13‧‧‧Electrical elastic wire

14‧‧‧Arc

15‧‧‧Arc

21‧‧‧Circular pieces

22‧‧‧through hole

31‧‧‧ top surface

30‧‧‧ bottom

23‧‧‧Electrical elastic wire

28‧‧‧Arc

24‧‧‧ curved

25‧‧‧Hooks

26‧‧‧Closed ring or buckle

32‧‧‧Support (holder)

33‧‧‧Metal spiral

34‧‧‧through hole

40‧‧‧Electrical elastic wire

41‧‧‧ Solenoid

54‧‧‧through hole

53‧‧‧through hole

51‧‧‧Electrical coil spring

52‧‧‧conductive coil spring

55‧‧‧Arc

56‧‧‧Arc

531‧‧‧Insulation structure

541‧‧‧Insulation structure

2‧‧‧Closed circuit

S‧‧‧Inductance Detector

The invention will be further described with reference to the accompanying drawings and embodiments in which: FIG. 1A is a schematic view of a first embodiment of an electrostatic discharge grounding device of the present invention; and FIG. 1B is a second embodiment of the electrostatic discharge grounding device of the present invention. 2 is a schematic view of a third embodiment of the electrostatic discharge grounding device of the present invention; FIG. 3 is a schematic view showing a conductive elastic wire passing through two through holes; and FIG. 4 is an electrostatic discharge grounding device of the present invention; 4 is a schematic view of a fifth embodiment of the electrostatic discharge grounding device of the present invention; and FIG. 6 is a schematic view of a through hole of a fifth embodiment of the electrostatic discharge grounding device of the present invention; A schematic view of the use of the electrostatic discharge grounding device of the present invention.

The various advantages, aspects, and novel features of the invention, as well as the illustrated embodiments. However, the various embodiments of the invention set forth herein are by way of example and not limitation.

1A is a schematic view of a first embodiment of an electrostatic discharge grounding apparatus of the present invention. Referring to FIG. 1A, the electrostatic discharge grounding device includes a circular block member 11. The circular block member 11 has two through holes 12 at its top and bottom surfaces, respectively. The conductive elastic wire 13 passes through the two through holes 12 from one through hole to the other through hole, thereby forming a protruding arc 14 on the bottom surface of the circular block member 11 for use as a static dissipative or conductive Soft surface contact with ground contact. Both ends of the conductive elastic wire 13 may be attached to an object to be grounded. As shown in FIG. 1A, the conductive elastic wires 13 form a rectangular continuous ring pattern on the top and bottom surfaces of the circular block member 11. Those skilled in the art will appreciate that there may be more through holes 12 in the top and bottom surfaces of the circular block member 11 such that, for example, the conductive elastic wires 13 are on the top surface of the circular block member 11 and A continuous circular pattern of a circle, an ellipse, a square, a hexagon or an irregular shape is formed on the bottom surface. In other embodiments of the present invention, the two ends of the conductive elastic wire 13 respectively pass through a through hole 12 and are then tied together. Thus, only an arc is formed on the bottom surface of the circular block member 11. Those skilled in the art will appreciate that the circular block member 11 can also be of a different shape, such as an elliptical shape, a rectangular shape, a hexagonal shape or an irregular shape.

In a preferred embodiment, the conductive elastic wire 13 is a metal spiral made of a metal wire having a thickness of 0.1 mm to 1 mm, and has a spiral diameter of 2 mm to 10 mm. In another embodiment, the metal spiral is a one or more lengths of metal spirals having different helical diameters combined from metal wires of various sizes, shapes, and thicknesses. In a preferred embodiment, the circular block member 11 is a circular metal block having a flat top surface and a flat bottom surface having a diameter ranging from 20 mm to 200 mm, and the circular metal block has a height ranging from 3 mm to 50 mm. In another embodiment, the circular metal block 11 may have any size as long as its planar diameter ranges from 20 mm to 200 mm and the height ranges from 3 mm to 50 mm.

It is a very unique design to pass the conductive elastic wire from one through hole to the other through the hole. Thus, the present invention forms a soft surface contact that is accessible to the ground by passing elastic conductive wires through the through holes. Thus, the present invention is simple to manufacture, low in cost, and eliminates the need for ball bearings, screws, bolts and nuts, adhesives, and rivets.

It is well known that in the actual case most static dissipative or conductive ground is uneven, so soft surface contact is better and more reliable than hard surface contact, and a more consistent electrical contact integrity can be obtained. For these common static dissipative or conductive floors, it is very important to have a common "conducting tube". Surprisingly, when the electrostatic discharge grounding device of the present invention is docked on the ground, an electrically conductive elastic wire is used, particularly as disclosed herein, as compared to existing static dissipative or electrically conductive swing casters, wheels or rollers on the market. Metal spirals are not only soft, durable, but also overcome the drawbacks of dust deposits or dust accumulation at the point of contact of the spiral (between the spiral and the ground).

This unique design provides a continuous cleaning solution for the top end of the helix in contact with the ground, ensuring that no foreign material is trapped between the ESD grounding device and the static dissipative or conductive ground. Circuit.

The dust-free or soil-free characteristics of the electrostatic discharge grounding device according to the present invention always ensure good performance in a well-managed electrostatic protected area (EPA) Conductive integrity does not affect the impedance of the human body to the ground. When a circular metal block is placed on the ESD floor, the helix on the bottom surface is subjected to a downward force exerted by the gravity of the circular metal block, thereby electrically connecting the spiral to the ESD ground. Due to the unique design of the helix and the metal block, the circular metal block is free to move in all directions. In a typical thermally welded static dissipative or electrically conductive PVC floor, the present invention overcomes any protruding ground seams or cracks due to ground aging.

Fig. 1B is a schematic view showing a second embodiment of the electrostatic discharge grounding apparatus of the present invention. Referring to FIG. 1B, the electrostatic discharge grounding device includes a circular block member 11. The circular block member 11 has three through holes 12 at its top and bottom surfaces, respectively. The conductive elastic wires 13 pass through the three through holes 12 from one through hole to the other through holes, thereby forming two protruding arcs 14 on the bottom surface of the circular block member 11 for use as static dissipative Or a soft surface contact of the conductive ground contact, and two protruding arcs 15 are formed on the top surface of the circular block member 11. Both ends of the conductive elastic wire 13 may be attached to an object to be grounded. As shown in FIG. 1B, the conductive elastic wires 13 are formed in an angular shape on the top and bottom surfaces of the circular block member 11.

2 is a schematic view of a third embodiment of the electrostatic discharge grounding apparatus of the present invention. Referring to FIG. 2, the electrostatic discharge grounding device includes a circular block member 21. The circular block member 21 has six through holes 22 at its top surface 31 and bottom surface 30, respectively. The conductive elastic wires 23 pass through the six through holes 22 from one through hole to the other through holes, thereby forming six protruding arcs 24 on the bottom surface 30 of the circular block member 21 to dissipate static electricity or The conductive ground contacts and forms five protruding arcs 28 on the top surface 31 of the circular block 21. The six arcs 24 and five arcs 28 extend horizontally on the bottom surface 30 and the top surface 31, respectively. Both ends of the conductive elastic wire 23 pass through the through hole at the center of the circular block 21 from the bottom surface 30 to the top surface 31 and continue to extend. The conductive elastic strand 23 has a hook member 25 at one end and a closed loop or buckle 26 at the other end to form an attachment means for attaching the electrostatic discharge grounding device to a device that requires grounding.

In another embodiment, the electrostatic discharge grounding device includes a circular block member 21. The circular block member 21 has three, four, five, seven or more or fewer through holes 22 in its top surface 31 and bottom surface 30, respectively. Those skilled in the art will appreciate that the circular block member 21 can also be of a different shape, such as an elliptical shape, a rectangular shape, a hexagonal shape or an irregular shape. In this embodiment The circular block member 21 has a central through hole at the center thereof, and other through holes uniformly or non-uniformly distributed on the annular pattern surrounding the center. Wherein the two ends of the conductive elastic wire 23 pass through the central through hole. Each of the other through holes has the conductive elastic wire 23 passing through the through hole from the top surface to the bottom surface and passing through the through hole from the bottom surface to the top surface.

In a preferred embodiment, the conductive elastic wire 23 is a metal spiral made of a metal wire having a thickness of 0.1 mm to 1 mm, and has a spiral diameter of 2 mm to 10 mm. In another embodiment, the metal spiral is a one or more lengths of metal spirals having different helical diameters combined from metal wires of various sizes, shapes, and thicknesses. In a preferred embodiment, the circular block member 21 is a circular metal block having a flat top surface and a flat bottom surface having a diameter ranging from 20 mm to 200 mm, and the circular metal block has a height ranging from 3 mm to 50 mm. In another embodiment, the circular metal block 21 may have any size as long as its planar diameter ranges from 20 mm to 200 mm and the height ranges from 3 mm to 50 mm.

It is a very unique design to pass the conductive elastic wire from one through hole to the other through the hole. Thus, the present invention forms a soft surface contact that is accessible to the ground by passing elastic conductive wires through the through holes. Thus, the present invention is simple to manufacture, low in cost, and eliminates the need for ball bearings, screws, bolts and nuts, adhesives, and rivets.

Fig. 3 is a schematic view showing that a conductive elastic wire passes through two through holes. As shown in FIG. 3, the block member may be a holder 32 to which a metal spiral 33 is attached. The support base 32 may have its own weight or may support the metal spiral 33 and generate a vertical downward force to assist the metal spiral 33 to electrically connect the ESD ground so that any residue in a typical ESD controlled working environment remains similar The electrostatic charge on an object such as a seat is discharged. As shown in FIG. 3, a metal spiral 33 in the through hole 34 passes through the through hole 34 from the top surface to the bottom surface and passes through the through hole 34 from the bottom surface to the top surface so as to be The top and bottom surfaces are curved.

Similarly, the support base 32 can be a shoe with a metal helix 33 mechanically attached to the underside of the shoe and vice versa. The weight applied to the shoe can be the weight of the person (not shown).

The metal spiral 33 is made of a metal wire having a thickness of 0.1 mm to 1 mm. Metal spiral with a helix diameter of 2mm to 10mm. In another embodiment, the metal spiral 33 is a segment or segments of metal spiral having different helical diameters combined from metal wires of various sizes, shapes, and thicknesses.

It is a very unique design to pass the conductive elastic wire from one through hole to the other through the hole. Thus, the present invention forms a soft surface contact that is accessible to the ground by passing elastic conductive wires through the through holes. Thus, the present invention is simple to manufacture, low in cost, and eliminates the need for ball bearings, screws, bolts and nuts, adhesives, and rivets.

Fig. 4 is a schematic view showing a fourth embodiment of the electrostatic discharge grounding apparatus of the present invention. As shown in FIG. 4, the conductive elastic wires 40 are attached with a plurality of solenoids 41 to slide the conductive elastic wires 40 on the ground to generate free-rotation motion while reducing wear of the conductive elastic wires 40 in contact with the ground. Other configurations of the electrostatic discharge grounding device can also be constructed in accordance with the embodiments discussed above.

Passing the conductive elastic wire from one through hole to the other through the hole is a very unique design because it can obtain the following advantages. For example, it can move freely in all directions, free to move on the ground with uneven ground seams or split lines, without causing any unwanted material shedding or spalling contamination in clean room applications, without any expensive Tools are therefore simple to manufacture, low in cost, and have little or no maintenance costs.

The conductive elastic wire of the present invention is formed by passing through a through hole to another through hole to form an arc having a different structure or configuration, and a certain downward force is applied to the metal spiral, so that A very unique grounding solution is formed between the object to be grounded and the ground.

5-6 are schematic views of a fifth embodiment of the electrostatic discharge grounding apparatus of the present invention. Referring to Figures 5-6, the electrostatic discharge grounding device includes a circular block member 11. The circular block member 11 has eight through holes on its top and bottom surfaces, respectively. The eight through holes are divided into two groups. The first set of through holes includes four through holes 54 near the center of the circular block member 11. The second set of through holes includes four through holes 53 near the outer circumference of the circular block member 11. The distribution of the conductive elastic wires can be provided as two independently distributed and electrically insulated conductive coil springs 51 and 52. The conductive coil spring 51 passes through the four through holes 53 from one through hole to the other through hole, thereby forming four protruding arcs 55 on the bottom surface and the top surface of the circular block member 11, The four protruding arcs 55 are horizontally stretched on the bottom and top surfaces to form an outer rectangle pattern. The conductive coil spring 52 passes through the four through holes 54 from one through hole to the other through hole, thereby forming four protruding arcs 56 on the bottom surface and the top surface of the circular block member 11, The four protruding arcs 56 are horizontally stretched on the bottom and top surfaces to form an inner rectangular pattern.

As shown in FIG. 6, the circular block member 11 is a metal circular block member having through holes 53, 54. The wall surfaces of the through holes 53, 54 are located on the metal circular block. The bottom surface of the circular block member 11 is insulated by inserting the insulating structure 531 or 541 into the through holes 53, 54. The insulating structure 531 or 541 is composed of a circular plastic plate having protruding cylindrical spikes. In other embodiments, the circular block member 11 is a metal circular block member having through holes 53, 54. The wall surfaces of the through holes 53, 54 are coated with an insulating material. Therefore, the two independently distributed conductive coil springs 51 and 52 are electrically insulated from each other.

Fig. 7 is a schematic view showing the use of the electrostatic discharge grounding device of the present invention. As shown in Fig. 7, both ends of the conductive coil spring of the electrostatic discharge grounding device 1 according to the present invention are connected to a closed circuit 2 in which an inductance detector S is connected. The inductive detector S is placed at any bit point in the closed circuit of the person sitting on the chair to the static dissipative or conductive floor to detect any open or closed circuit of the circuit to ensure the ground integrity of the closed circuit.

The present invention achieves a simple and unique grounding technology solution that can be applied in current conventional industries. In summary, the electrostatic discharge grounding device developed by the present invention is not only simple to manufacture, low in cost, and durable, but also effectively dissipates the electrostatic charge in the presence of dirt or dust particles.

While the invention has been described by way of specific embodiments, the embodiments of the invention Therefore, the invention is not limited to the specific embodiments disclosed, but all the embodiments falling within the scope of the appended claims.

11‧‧‧Circular pieces

12‧‧‧through hole

13‧‧‧Electrical elastic wire

14‧‧‧Arc

Claims (9)

An electrostatic discharge grounding device, comprising: a block member and a conductive elastic wire, the block member comprising a plurality of through holes on a top surface and a bottom surface thereof, wherein the conductive elastic wire passes from one through hole to another through hole Passing through the plurality of through holes to form a plurality of arcs protruding at least on the top surface and the bottom surface of the block, and the conductive elastic wires are annular in the top surface and the bottom surface The pattern stretches at a level. The electrostatic discharge grounding device of claim 1, wherein a central through hole is located at a center of gravity of the block member and the remaining through holes are equidistantly distributed on a ring pattern surrounding the center of gravity, wherein the conductive elasticity The wire passes through the central through hole at both ends, and each through hole has the conductive elastic wire passing through the through hole from the top surface to the bottom surface and passing through the through hole from the bottom surface Holes to the top surface. The electrostatic discharge grounding device of claim 2, wherein the conductive elastic wire forms a circular, elliptical shape on the top surface, the bottom surface or the top surface and the bottom surface of the block member. A continuous circular pattern of square, rectangular, hexagonal or irregular shapes. The electrostatic discharge grounding device according to any one of claims 1 to 3, wherein the conductive elastic wire comprises at least a first conductive elastic wire and a second conductive elastic wire electrically insulated from each other, The plurality of through holes includes at least a first set of through holes and a second set of through holes, and the first conductive elastic wires pass through from the one of the first set of through holes to the other of the first set of through holes The first set of through holes, the second conductive elastic wires passing through the second set of through holes from one of the second set of through holes to the other of the second set of through holes. The electrostatic discharge grounding device of claim 4, wherein the block member is a metal block member, and the plurality of through holes are inserted with an insulating structure, the insulating structure being formed by a protruding cylindrical spike. Round plastic plate. The electrostatic discharge grounding device of claim 1, wherein the conductive elastic wire is attached with a plurality of solenoids to generate a freely rotating motion when the conductive elastic wire slides on the ground. The electrostatic discharge grounding device according to claim 1, wherein the conductive elastic wire comprises a metal spiral wire, and the metal spiral wire is composed of a metal wire having a thickness of 0.1 mm to 1 mm. Made in which the helix has a diameter of 2 mm to 10 mm. The electrostatic discharge grounding device of claim 7, wherein the metal spiral has a hook at one end and a closed loop or buckle at the other end to attach the electrostatic discharge grounding device to a need Grounded device. The electrostatic discharge grounding device of claim 1, wherein the block member is a circular metal block having a flat top surface and a flat bottom surface having a diameter ranging from 20 mm to 200 mm, and the circular metal block The height range is from 3mm to 50mm.