JP3228885U - Cable shield parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield component which is inexpensive and can obtain a high shielding effect and transmission quality. SOLUTION: A shield component used for transmitting an analog signal and / or a digital signal in a manner of surrounding or winding a cable, including one or more shield layers 1000, the shield layer at a minimum surrounding the cable, and the cable. A shield portion 100 having a gap portion 140 mounted at one end and a mounting portion 120 for fixing the shield layer and performing a shield operation located near the gap portion is further provided, and a shield of one or more shield layers is provided. The parts are conductively connected to each other, connected in series with the ground terminal of the cable via a filter component, the shield part is wrapped in an insulating tube and attached to the braided shield, and the remaining shield part is spiral and minimizes the braided shield. Wrap to the limit and extend between the first and second ends of the braided shield. [Selection diagram] Fig. 1

Description

The present invention relates to shielded components, more specifically, to transmit analog and / or digital signals and / or AC and / or DC currents in a cable-wrapping, winding or encircling manner for optimum shielding effect and transmission quality. It is a shield part to be provided.

Electrical noise is usually radiated or conducted in the form of electromagnetic interference, which interferes with the normal operation of electronic devices, so a shield device that minimizes the effects of electromagnetic interference is needed. The cable is the receiver while being the main transmitter in the transmission of electromagnetic interference. As a transmitter, the cable becomes an antenna that conducts or radiates noise to other devices. As a receiver, the cable receives electromagnetic interference signals from other sources.

The main way to deal with electromagnetic interference in the cable is to use a shield device. The shield device wraps a conductor inside the cable that transmits a signal or power to prevent electromagnetic interference in two ways: (1) Reflects energy; (2) Receives noise and conducts ground conduction. In the above two cases, the electromagnetic interference does not contact the conductor. In either case, if the energy is not significantly reduced for no reason, some will cause the above interference through the shield device.

The cable is provided with different degrees of shielding and has different degrees of shielding effect. The number of shielded devices depends on factors such as the electrical environment in which the cable is used, the cost of the cable (usually the more cable shielded devices the higher the cable), and the diameter, weight and flexibility of the cable. It is decided. Therefore, it is feasible to produce a shield device that is cheaper, has a higher or ideal shielding effect.

The present invention is a shield component that transmits analog and / or digital signals, and / or AC and / or DC currents in a cable wrapping, winding or encircling manner, with one or more shield layers, gaps, attachments. Including part and shield part
The shield layer wraps at least a portion of the cable
The gap is preferably attached to one end of the cable, the gap forming a gap at one end corresponding to the cable or another shield layer.
The mounting portion is close to the gap and fixes the shield layer.
The shield portion is close to the mounting portion or the gap portion to realize the shield operation.
The shield portions of the shield layer are electrically connected to each other and can be directly grounded or floating grounded, preferably connected in series with the ground terminal of the cable via a filter component.
The shield is preferably wrapped in an insulating tube and attached to the braided shield, the remaining shield being spirally wound around the braided shield to a minimum and between the first and second ends of the braided shield. It can be stretched and directly grounded or floating grounded.

In some embodiments, the spiral shield comprises at least one round of bare wire, can be directly grounded or floated, and is preferably connected in series with the grounding terminal of the cable via a filter component, and / Alternatively, the spiral shield and the braided shield are conductively connected.

In some embodiments, the filter component that allows the cable to float ground is preferably a capacitor and / or ferrite bead with a capacitance of ≤0.1 μF.

In some other embodiments, the spiral shield is a bare wire, the number of laps and / or length thereof is preferably determined by the cable diameter or the internal transmission signal of the cable or the conductor diameter of power.

In some embodiments, the spiral shields of at least one or more shield layers are current connected to each other, preferably connected in series with the ground terminal of the cable via a filter component, and / or at least one or more. The spiral shields in the shield layer are isolated from each other, and / or at least one or more shield layers surrounding the spiral shield are isolated from each other.

In some embodiments, the shielded insulating tubing and / or braided shield is securely secured or attached to at least some attachments with adhesive, clamping pieces, and / or plastic tape, and also on the attachments. Stretch between both ends.

In some embodiments, it further comprises a heat shrink tubing that is attached to the shielded component of the cable and is at least a shielded component that wraps the cable, preferably as an outer sheath for each component, portion, shield layer and / of the cable. Or protect and secure the layer.

In some embodiments, the spiral shield is bare wire and preferably has a number of turns and / or a shaft length that is inversely proportional to the diameter of the cable and / or the conductor wrapped in the cable.

In some embodiments, the number of laps is in the range of 1-50, preferably 1-40, and / or the cable diameter is in the range of 2-60 mm, preferably 4-30 mm. is there.

In some embodiments, the shield insulation tube and / or braided shield is installed to cover the shield layer and extend from the gap of the corresponding shield layer to the shield and / or with both ends of the cable. Installed so as to be isolated from the corresponding cable connector.

It is a figure which shows the shield component which has one shield layer in this invention. In the present invention, it is a figure which shows the other shield component which has three shield layers. It is a figure which shows the shield component which has a filter component in this invention.

Some preferred embodiments of the present invention will be described in detail with reference to the drawings.

The aluminum foil and the braided layer are two shield devices commonly used for cables, and the shield component of the present invention uses both of them at the same time.

A thin layer of aluminum is used for the aluminum foil and the shield layer, which adheres mainly to carriers such as polyester to increase strength and durability. It can completely cover the surrounding conductors, but it is very thin and difficult to operate (especially when installing the connector).

By using a low resistance ground wire for the braided layer, crimp terminal connection or weld terminal connection can be easily performed when installing the safety connector. However, the braided shield cannot completely cover the conductor. When covering, there are small gaps. Depending on the difference in braid density, the coverage of the braid layer is 70% to 95%. When the cable is fixed, 70% coverage is usually sufficient. Since the conductivity of copper is superior to that of aluminum, the braided layer has more space to conduct noise. Therefore, the braided layer increases the size and cost of the cable, but the shielding effect as a shielding layer is better.

In the present invention, the aluminum foil and / or braided layer provides the optimum shielding effect as the primary and / or secondary shield, and the spiral shield containing at least one round of bare wire as the extra primary or other primary shield. , Maintain higher signal and power transmission quality. The shielding effect can be increased by lowering the shielding resistance, allowing any filter component to easily and quickly and reliably make terminal connections and / or floating grounds, thereby eliminating ground loops and ground loops. Coupling noise generated by can be reduced.

See FIG. 1, which shows the shield component of the present invention. In FIG. 1, the shield component 10 that transmits analog and / or digital signals in a cable-wrapping, winding, or encircling manner comprises at least one shield layer 1000 that wraps at least a portion of the cable, preferably one end of the cable. The gap is attached to a gap 140 that forms a gap at one end or another shield layer corresponding to the cable, a mounting portion 120 that is close to the gap and secures the shield layer, and a mounting portion or near the gap. Includes a shield unit 100 that realizes a shield operation.

In some embodiments, the length of the gap in the first shield layer is in the range 0-10 mm, preferably 1-9 mm, and the length of the mounting portion is in the range 0-20 mm. , Preferably 5 to 15 mm.

In the shield portion of at least one / one or more shield layers, conductive connection or current connection is made between them, and direct grounding or floating grounding is preferable, and for example, they are connected in series with the ground terminal of the cable via a filter component. Is preferable (not shown).

In some embodiments, the spiral shields of at least one or more shield layers are current connected to each other, preferably connected in series with the ground terminal of the cable via a filter component, and / or at least one or more. The spiral shields in the shield layer are isolated from each other, and / or at least one or more shield layers surrounding the spiral shield are isolated from each other. As such, the shield layers between and / or wrapping the spiral shields in the plurality of shield layers are isolated from each other, not isolated, or a mixture of both, depending on the particular application.

It is preferable to wrap the shield portion with an insulating tube and attach it to the braided shield. It has one spiral shield that is preferably directly grounded or floating grounded, at least partly wound around the braided shield and basically extending between both ends of the braided shield. There are several grounding methods to obtain similar results, but the effects of different installation methods are different, and the output audio quality is also different.

Regardless of the grounding method used, it is preferable to ground the bare wire as needed. Further, the bare wire may be grounded at an arbitrary specific position, because the bare wire attached to the braid layer may be grounded at an arbitrary position.

In some embodiments, the spiral shield comprises at least one round of bare wire. Direct grounding or floating grounding is possible, preferably connected in series with the grounding terminal of the cable and / or any grounding position and / or ground of the electrical components of the cable, and / or the spiral shield and braided shield are conductively connected. , And / or the spiral shield is mounted in a preset position on the cable and may also perform a specific effect, preferably near the output end of the cable for optimum output quality.

See FIG. 2, showing the other shield components of the present invention. In FIG. 2, the shield component 20 that transmits analog and / or digital signals in a cable-wrapping, winding, or encircling manner is similar to that shown in FIG. 1, but further comprises a plurality of shield layers 1000, 2000, 3000. Each shield layer wraps at least a portion of the cable, preferably having a gap attached to one end of the cable, said gap forming a gap at one end corresponding to the cable or another shield layer. It has mounting portions 120, 220, 320 that are close to the portion to fix the shield layer, and shield portions 100, 200, 300 that are close to the mounting portion or the gap portion to realize the shield operation.

In some embodiments, the respective insulating tubes 150, 250, 350 and / or braided shields 130, 230, 330 of the shield are made of adhesive, via a clamping piece such as a rubber ring (not shown), and / Or firmly secured or attached to the attachment, shield and / or underlying cable with plastic tape 135, 235, 335, and / or stretch between both ends of the attachment and / or shield.

In some embodiments, in the first, second and subsequent shield layers, the length range of each gap is 0-10 mm, and in the second and subsequent shield layers, each attachment. The length range of is 0 to 20 mm, preferably 5 to 15 mm. Therefore, it is not necessary to attach the gap portion and / or the attachment portion that performs a specific action to the first, second, and subsequent shield layers. The arrangement, length and position of all gaps and mountings may vary, and the above is a feasible example for various installation and production purposes, with each metal braided layer It may be mounted as close as possible to the front and rear shield layers, or may completely cover the front and rear metal braid layers, or may be completely covered by them. Further, the grounding spiral shield having a bare wire can be attached to an arbitrary specific position of each shield layer to realize a shield operation.

In some embodiments, the length of the attachment may be increased to ≥10 cm, and the spiral shield may be spiral rather than annular. However, even if the spiral shield extending around the metal braided layer forms an annular, spiral or straight line, the length of the bare wire attached to the attachment is consistent with or similar to the table below. Based on this, the most important is the range of the actual transmission length between the bare wire and the attached metal braid layer, regardless of how the bare wire contacts the metal braid layer (eg metal). Along the braided layer, it may form an annular, spiral or straight line). In essence, the design and installation of the spiral shield is intended to facilitate production and, in addition, to apply this design to a large number of metal braided layers of cables.

In some embodiments, the shielded insulating tube and / or braided shield is installed so as to cover the shield layer and extend from the gap of the corresponding shield layer to the shield and / or with both ends of the cable. Installed so as to be isolated from the corresponding cable connector.

In some embodiments, further comprising a heat shrink tubing (not shown) that is attached to the shielded component of the cable and wraps at least the shielded component of the cable, preferably as an outer sheath, each component of the cable, a portion. Protects and secures shielded and / or layers. Similarly, each shield layer may not require a mounting section, and all layers are secured in place by a shrinkable outer sheath. In some embodiments, the shield component may also be attached to an inner sheath 5 made of an insulating material (eg, plastic), the inner sheath wrapping the cable 3 and the cable providing a conductor that transmits a signal or power. Have one or more. In some embodiments, the cable 3 includes a signal cable, a power cable, and / or a coaxial cable having one or more conductors.

See FIG. 3, showing another shield component 30 of the present invention. In FIG. 3, the installation of the shield component 30 is similar to that of FIG. 2, except that one end 318 of the bare wire is connected in series with the ground end via the cable filter component 380.

In some embodiments, the spiral shields 110, 120, 130 of the corresponding shield layers are current connected to each other and can be directly grounded or floating grounded, preferably in series with the grounding end at cable filter component 380. Connecting.

In some embodiments, the filter component that allows the cable to float ground is preferably a capacitor and / or ferrite bead with a capacitance of ≤0.1 μF.

In some embodiments, the spiral shield is bare wire, the number of laps thereof and / or the length of the shaft is preferably inversely proportional to the diameter of the cable (shown in FIG. 2).

In some embodiments, the number of laps is in the range of 1-50, preferably 1-40, and / or the cable diameter is in the range of 2-60 mm, preferably 4-30 mm.

In some embodiments, the number of orbits and / or length of the spiral shield or bare wire is preferably determined by the diameter of the cable or the diameter of the internal signal or power transmission conductor of the cable, as shown in the table below.

In some embodiments, the shielded component is used with or wrapped around the audio cable, and multiple shield layers in the shielded component of the present invention block electromagnetic interference and other noise as much as possible. Therefore, the output / sound quality is remarkably improved.

The features described in the Utility Model Claims (which can be incorporated as needed) constitute the present invention and are incorporated herein by reference.

The various examples or embodiments of the present invention are for illustration purposes only and are not limited in scope. It should be understood that the present invention is subject to various modifications in various aspects and is not construed as a limitation.

Claims (10)

A shielded component that wraps, winds, or surrounds a cable to transmit analog and / or digital signals, and / or AC and / or DC currents, including one or more shield layers, gaps, mounts, and shields. Including
The shield layer wraps at least a portion of the cable
The gap is preferably attached to one end of the cable, the gap forming a gap at one end corresponding to the cable or another shield layer.
The mounting portion is close to the gap and fixes the shield layer.
The shield portion is close to the mounting portion or the gap portion to realize the shield operation.
The shield portions of the shield layer are electrically connected or current connected to each other and can be directly grounded or floating grounded, preferably connected in series with the ground terminal of the cable via a filter component.
The shield is preferably wrapped in an insulating tube and attached to the braided shield, the remaining shield being spirally wound around the braided shield to a minimum and between the first and second ends of the braided shield. It can be stretched and directly grounded or floating grounded. The spiral shield includes a bare wire that winds at least one round, can be directly grounded or floated grounded, is preferably connected in series with the ground terminal of the cable via a filter component, and / or the spiral shield and braided shield. The shield component according to claim 1, wherein the shield component is a conductive connection. The shield component according to claim 1, wherein the filter component that enables floating grounding of the cable is preferably a capacitor and / or ferrite beads having a capacitance of ≤0.1 μF. The shield component according to claim 1, wherein the spiral shield is a bare wire, and the number of circumferences and / or the length thereof is preferably determined by the cable diameter or the conductor diameter of the internal transmission signal or power of the cable. The spiral shields of one or more shield layers are current connected to each other, preferably connected in series with the ground terminal of the cable via a filter component, and / or the spiral shields in at least one shield layer are connected to each other. The shield component according to claim 1, wherein at least one or more shield layers that are isolated and / or enclose the spiral shield are isolated from each other by a particular application. The insulating tubing and / or braided shield of the shield is firmly secured or attached to at least some attachments with adhesive, clamping pieces, and / or plastic tape, and / or extends between the ends of the attachment. The shield component according to claim 1, wherein the shield component is characterized by the above. It further includes a heat shrink tubing that is attached to the shielded part of the cable and is at least the shielded part that wraps the cable, preferably as an outer sheath to protect and secure each component, portion, shield layer and / or layer of the cable. The shielded component according to claim 1. The shield component according to claim 1, wherein the spiral shield is a bare wire and preferably has a number of turns and / or a shaft length that is inversely proportional to the diameter of the cable and / or the conductor wrapped in the cable. Claims characterized in that the number of laps is in the range of 1 to 50, preferably 1 to 40, and / or the cable diameter is in the range of 2 to 60 mm, preferably 4 to 30 mm. Item 8. The shield component according to item 8. The shield insulation tube and / or braided shield is installed to cover the shield layer and extend from the gap in the corresponding shield layer to the shield and / or isolate both ends of the cable from the corresponding cable connector. The shield component according to claim 1, wherein the shield component is installed so as to be used.