Noise suppression tape

Abstract

The noise suppression tape (10) comprises a tape-shaped insulator (11), an adhesive layer (12), and a conductive layer (13). The other side (12b) of the adhesive layer (12) is bonded to and fixed to one side (11a) of the insulator (11), with one side (12a) exposed. The width of the adhesive layer (12) is the same as the width of the insulator (11). One side (13a) of the conductive layer (13) is located on the same plane as the one side (12a) of the adhesive layer (12) and is exposed, and the conductive layer (13) is embedded in the adhesive layer (12) and fixed to the adhesive layer (12). The width of the conductive layer (13) is narrower than the width of the adhesive layer (12).

Description

Technical Field

[0001] The present invention relates to a noise suppression tape, in particular to a noise suppression tape suitable for use in shielded cables. Background Art

[0002] In communication cables that transmit high-frequency signals to communication equipment, shielded cables are generally used to protect the communication cables from the influence of ambient noise in a high-noise environment or to suppress the influence of noise emitted from the communication cables connected to high-power communication equipment.

[0003] The method of connecting communication equipment to shielded cables has the use of shielded connectors.

[0004] The method of using a shielded connector is to use the shielded connector to electrically connect the entire circumference of the shielded conductor in the shielded cable, and connect the shielded conductor to the ground potential to achieve noise shielding from the outside to the core wire, i.e., the internal conductor in the shielded cable, or from the internal conductor in the shielded cable to the outside.

[0005] However, there are cases where a shielded connector cannot be used due to design constraints or the like. In such cases, a method of connecting a shielded cable to a communication device using a pigtail is employed.

[0006] For example, in industrial equipment that often requires many signal lines to be connected, multiple signal lines are sometimes combined into one connector to transmit various signals, from analog to high-speed digital, between multiple devices with different functions using communication cables.

[0007] Furthermore, when the size of the connector is predetermined and a thin communication cable must be connected to the connector, even if the internal conductor of the communication cable can be connected to the connector pin, there is a possibility that the connection between the communication device and the shielded conductor in the shielded cable will not engage.

[0008] In such cases, when using a pigtail structure to connect a shielded cable to a communication device, the pigtail length must be increased at the terminal end of the shielded cable, i.e., the portion of the pigtail used for electrical connection to the communication device, due to design and operational constraints such as the pigtail installation process. As a result, the exposed portion of the inner sheath between the inner conductor and the shield conductor tends to be longer.

[0009] If the exposed portion in the internal covering body is necessarily longer, the shielding structure in the shielded conductor that shields the internal conductor will disappear in the exposed portion in the internal covering body, and the noise transmitted to the shielded conductor will be transmitted to the soft pigtail, which will easily cause noise to radiate from the soft pigtail and interfere with the high-frequency signal transmitted in the internal conductor, thereby deteriorating the shielding performance.

[0010] Furthermore, since there is no shield conductor around the inner conductor in the exposed portion of the inner cover, noise from external devices and the like easily interferes with the inner conductor, which easily leads to a deterioration in noise resistance.

[0011] On the other hand, Patent Document 1 discloses an electromagnetic shielding material that surrounds a bundle of cables such as interface cables and power cables that are not shielded cables, or cords such as electric wires that emit unnecessary radiation.

[0012] The electromagnetic shielding material disclosed in Patent Document 1 has insulating coatings provided on the front and back surfaces of a conductive, long, thin-walled body.

[0013] Prior art literature

[0014] Patent Literature

[0015] Patent Document 1: Japanese Patent Application Laid-Open No. 5-283883 Summary of the Invention

[0016] Problems to be solved by the invention

[0017] It is conceivable to wrap an electromagnetic shielding material as disclosed in Patent Document 1 around the exposed portion of the inner covering of a shielded cable to shield the exposed portion from noise from the outside to the inner conductor, or from noise from the inner conductor to the outside.

[0018] However, in the overlapping sections of wound electromagnetic shielding material, capacitive coupling occurs between the upper and lower conductive thin-walled members through the insulating coating. This capacitance resonates with the self-inductance of the conductive thin-walled members in the electromagnetic shielding material, potentially degrading the transmission characteristics of high-frequency signals transmitted through the shielded cable's inner conductor at specific frequencies.

[0019] The present invention has been completed in view of the above-mentioned problems, and its purpose is to obtain a noise suppression belt that, when used in the exposed part of the inner covering body at the end of a shielded cable, will not impair the operability of the shielded cable on the equipment, can suppress the deterioration of the shielding performance and noise resistance at the exposed part of the inner covering body against noise from the outside to the internal conductor in the shielded cable, or noise from the internal conductor in the shielded cable to the outside, and can suppress the deterioration of the transmission characteristics of high-frequency signals transmitted in the internal conductor of the shielded cable.

[0020] Means for solving problems

[0021] The noise suppression tape of the present invention comprises a tape-shaped base and an adhesive layer, the tape-shaped base comprising: a long insulator having one side, another side, one side and another side; and a conductor having one side, another side, one side and another side, the length of which is the same as that of the insulator, the conductor and the insulator are arranged in parallel, one side of the conductor is bonded to the other side of the insulator and fixed, the length of the adhesive layer is the same as that of the base, the adhesive layer comprises: an adhesive layer having one side, another side, one side and another side; and a conductive adhesive layer having one side, another side, one side and another side, the conductive adhesive layer and the adhesive layer are arranged in parallel, one side of the conductive adhesive layer is bonded to the other side of the adhesive layer, one side of the adhesive layer and one side of the insulator are located on the same plane, the other side of the conductive adhesive layer and the other side of the conductor are located on the same plane, and the other side of the adhesive layer is bonded to one side of the base and fixed.

[0022] Effects of the Invention

[0023] According to the present invention, the following effects are achieved: when the exposed part of the internal covering body is used at the end portion of the shielded cable, the operability of the shielded cable on the equipment will not be impaired, the deterioration of the shielding performance and noise resistance of the exposed part of the internal covering body can be suppressed, and the deterioration of the transmission characteristics of the high-frequency signal transmitted in the internal conductor of the shielded cable can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a perspective view of the noise suppression tape according to the first embodiment.

[0025] Figure 2 yes Figure 1 Sectional view II-II in .

[0026] Figure 3 This is a structural diagram showing Application Example 1 in which the noise suppression tape according to the embodiment is used in a shielded cable.

[0027] Figure 4 This is a structural diagram showing Application Example 2 in which the noise suppression tape according to the embodiment is used in a shielded cable.

[0028] Figure 5 This is a perspective view of a noise suppression tape according to a second embodiment.

[0029] Figure 6 This is a perspective view of a noise suppression tape according to a third embodiment.

[0030] Figure 7 yes Figure 6 Section view VII-VII in the figure.

[0031] Figure 8This is a cross-sectional view of essential parts showing an application example in which the noise suppression tape according to the third embodiment is used in a shielded cable. DETAILED DESCRIPTION

[0032] Implementation Method 1

[0033] use Figure 1 and Figure 2 The noise suppression tape 10 according to the first embodiment will be described.

[0034] The noise suppression tape 10 includes an insulator 11 , an adhesive layer 12 , and a conductive layer 13 , and has a structure in which the adhesive layer 12 and the conductive layer 13 are laminated on one surface 11 a of the tape-shaped insulator 11 .

[0035] The other side 12b of the adhesive layer 12 is bonded to and fixed to the one side 11a of the insulator 11, leaving the one side 12a exposed. The width of the adhesive layer 12 is the same as the width of the insulator 11. In this first embodiment, the width refers to the short side direction of the noise suppression tape 10, and the length direction refers to the long side direction of the noise suppression tape 10.

[0036] The adhesive layer 12 is an adhesive such as an epoxy resin adhesive, a hot melt adhesive, a rubber solvent adhesive, an elastic adhesive, or a phenolic resin adhesive.

[0037] One side 13a of the conductive layer 13 is located on the same plane as the one side 12a of the adhesive layer 12 and is exposed. The conductive layer 13 is embedded in the adhesive layer 12 and fixed to the adhesive layer 12. The width of the conductive layer 13 is narrower than the width of the adhesive layer 12. The conductive layer 13 is arranged along the longitudinal direction at the center of the width direction of the adhesive layer 12.

[0038] The conductive layer 13 is a soft, strip-shaped conductor made of conductive metal foil such as copper foil or aluminum foil, a conductive adhesive made by mixing conductive metal or carbon fibers or powder in an adhesive such as an epoxy resin adhesive, a hot melt adhesive, a rubber solvent-based adhesive, an elastic adhesive, or a phenolic resin adhesive, or a soft, strip-shaped conductive tape made by infiltrating a conductive adhesive into a porous non-conductive tape of non-woven fabric.

[0039] Next, use Figure 3 Application Example 1 in which the noise suppression tape 10 according to the first embodiment is used in the shielded cable 1 will be described.

[0040] The shielded cable 1 includes an inner conductor 2 , an inner covering 3 , a shield conductor 4 , and an outer covering 5 arranged concentrically from the inside to the outside.

[0041] The inner conductor 2 is a core wire that transmits high-frequency signals from or to the communication device 50. The inner conductor 2 is a copper wire or a twisted copper wire. In the first embodiment, a single signal wire is shown as the inner conductor 2, but a plurality of signal wires may also be used.

[0042] The inner covering body 3 is an insulator made of synthetic resin that covers the entire outer peripheral surface of the inner conductor 2 .

[0043] The shield conductor 4 covers the entire outer peripheral surface of the inner covering body 3. The shield conductor 4 includes a resin layer 4a in contact with the inner covering body 3 and a shielding outer conductor 4b located on the outer periphery of the resin layer 4a.

[0044] The shield outer conductor 4 b is a braided wire made of a conductive metal and is formed of a conductive foil such as copper foil.

[0045] The outer covering body 5 is an insulator made of synthetic resin that covers the entire outer peripheral surface of the shield conductor 4 .

[0046] At the terminal end of the shielded cable 1, i.e., the end electrically connected to the communication device 50, the inner conductor 2 protrudes from the inner covering 3, exposing the outer circumference of the inner covering 3 and the outer circumference of the shielding outer conductor 4b of the shielded conductor 4. Furthermore, the shielding outer conductor 4b located in the portion where the inner covering 3 is exposed is connected to a pigtail 4c. The terminal end of the pigtail 4c is electrically connected to the ground potential node in the communication device 50, i.e., the grounded housing 51. Alternatively, the electrical connection between the shielding outer conductor 4b and the housing 51 may be made via a wire instead of the pigtail 4c.

[0047] Communication device 50 has a substrate 52 mounted with circuit components required for communication equipment and a connector 53 for electrically connecting the circuit components on substrate 52 arranged inside housing 51. Housing 51 has a through hole 51a through which inner conductor 2 and inner cover 3 of shielded cable 1 pass.

[0048] The end portion of the inner conductor 2 in the shielded cable 1 is inserted into the pin portion of the connector 53 and electrically connected.

[0049] On the other hand, the relationship between the noise suppression tape 10 and the shielded cable 1 is as follows Figure 3 shown.

[0050] That is, the central portion of the noise suppression tape 10 is spirally wound around the exposed outer peripheral surface of the inner covering body 3 at the end portion of the shielded cable 1 in a manner such that the other surface 11b of the insulator 11, which becomes the outer surface, is located on the outside, and the side portions of the noise suppression tape 10 overlap, and one side 12a of the adhesive layer 12 and one side 13a of the conductive layer 13 are adhered to the exposed outer peripheral surface of the inner covering body 3.

[0051] At one end of the noise suppression tape 10 , one end of the conductive layer 13 is electrically connected to the surface of the shielding outer conductor 4 b of the shield conductor 4 of the shielded cable 1 .

[0052] Furthermore, at the other end portion of the noise suppression tape 10 , the other end portion of the conductive layer 13 is electrically connected to the housing 51 .

[0053] As a result, the conductive layer 13 of the noise suppression tape 10 becomes a ground potential node, ie, grounded, over the entire area.

[0054] Therefore, the conductive layer 13 of the noise suppression tape 10 forms a shielding structure relative to the inner conductor 2 inside the exposed inner covering 3 at the terminal end of the shielded cable 1, thereby achieving a noise shielding effect, thereby suppressing the deterioration of the shielding performance and noise resistance.

[0055] Furthermore, when the noise suppression tape 10 is spirally wound around the exposed outer circumference of the inner cover 3, the outer surface of the noise suppression tape 10 becomes the other surface 11b of the insulator 11. Therefore, even if other conductive objects come into contact with the noise suppression tape 10, an electrical short circuit will not occur. Furthermore, since the insulator 11 forms the outer surface of the noise suppression tape 10, corrosion of the outer surface of the noise suppression tape 10 is prevented.

[0056] Therefore, regarding the insulation and corrosion resistance of the noise suppression tape 10 from the outside, no additional work such as winding the insulating tape is required, thereby suppressing increases in manufacturing man-hours, costs, and system weight.

[0057] Furthermore, in the noise suppression tape 10 , since one side 13 a of the conductive layer 13 is exposed, electrical connection between one end of the conductive layer 13 and the shielding outer conductor 4 b of the shielded cable 1 and between the other end of the conductive layer 13 and the housing 51 of the communication device 50 are facilitated.

[0058] When noise suppression tape 10 is spirally wrapped around the exposed outer circumference of inner cover 3, the side portions of the upper noise suppression tape 10 overlap with the side portions of the lower noise suppression tape 10. However, because the width of conductive layer 13 is narrower than that of adhesive layer 12, the upper and lower conductive layers 13 do not overlap, or their overlap is minimized. This minimizes the effects of capacitive coupling between upper and lower conductive layers 13 at the overlapping portion. Consequently, noise suppression tape 10 can cause a high-frequency shift at specific frequencies that can degrade the transmission characteristics of high-frequency signals transmitted through inner conductor 2 of shielded cable 1, thereby minimizing the effects on signal transmission.

[0059] Next, use Figure 4Next, a description will be given of Application Example 2 in which the noise suppression tape 10 of the first embodiment is used in the shielded cable 1 .

[0060] Application Example 1 is an example in which the central portion of the noise suppression tape 10 is spirally wound around the exposed outer peripheral surface of the inner cover 3 , whereas Application Example 2 is an example in which the tape is attached along the longitudinal direction.

[0061] That is, the central portion of the noise suppression tape 10 is arranged so that the other side 11b of the insulator 11, which becomes the outer surface, is on the outside, and along the length direction of the shielded cable 1, one side 12a of the adhesive layer 12 and one side 13a of the conductive layer 13 are bonded to the outer peripheral surface of the exposed inner covering body 3 at the end portion of the shielded cable 1.

[0062] At one end of the noise suppression tape 10 , one end of the conductive layer 13 is electrically connected to the surface of the shielding outer conductor 4 b of the shield conductor 4 of the shielded cable 1 .

[0063] Furthermore, at the other end portion of the noise suppression tape 10 , the other end portion of the conductive layer 13 is electrically connected to the housing 51 .

[0064] As a result, the conductive layer 13 of the noise suppression tape 10 becomes a ground potential node, ie, grounded, over the entire area.

[0065] In Application Example 2 constructed in this way, as in Application Example 1, the portion of the shielded cable 1 where the internal covering body 3 is exposed has the effect of shielding the internal conductor 2 of the shielded cable 1 from noise, and suppresses the increase in manufacturing time, cost, and system weight. On this basis, there is no need to newly consider the insulation and corrosion resistance of the noise suppression band 10 relative to the outside, and the electrical connection between one end of the conductive layer 13 and the shielding outer conductor 4b of the shielded cable 1, and the electrical connection between the other end of the conductive layer 13 and the shell 51 of the communication device 50 are easy.

[0066] In Application Examples 1 and 2, the noise suppression tape 10 is applied to a case where one connector 53 is connected to one shielded cable 1 . However, the noise suppression tape 10 may be applied to each of a plurality of shielded cables 1 connected to the connector 53 .

[0067] In this case, the noise suppression tape 10 is adhered to each of the plurality of shielded cables 1 as shown in Application Example 1 or Application Example 2.

[0068] In addition, in Application Example 1 and Application Example 2, an application example of the noise suppression band 10 is shown when the shielded cable 1 is connected to the connector 53 arranged inside the shell 51 of the communication device 50, but the noise suppression band 10 can also be applied to the shielded cable 1 in the same manner when the shielded cable 1 is connected to a relay connector instead of the connector 53.

[0069] Furthermore, the noise suppression tape 10 of the first embodiment can also be applied to a dedicated communication cable having no shield conductor 4 and when a noise suppression tape is wound from a connection source to a connection destination of the dedicated communication cable to obtain a shielding structure covering the entire area of ​​the dedicated communication cable.

[0070] Implementation Method 2

[0071] use Figure 5 The noise suppression tape 10 according to the second embodiment will be described.

[0072] The noise suppression tape 10 of embodiment 2 differs from the noise suppression tape 10 of embodiment 1 in that, in the conductive layer 13, the widths of the electrical connection portions 13b and 13c located at the two ends of the noise suppression tape 10 in the longitudinal direction are wider than the width of the central portion 13d, and other aspects are the same.

[0073] In addition, Figure 5 In, with Figures 1 to 4 The same reference numerals as those shown indicate the same or corresponding parts.

[0074] The noise suppression tape 10 of the second embodiment is also similar to the noise suppression tape 10 of the first embodiment. Figure 3 Application Example 1 and Figure 4 The same is applied to Application Example 2 shown.

[0075] That is, in Application Example 1, the central portion of the noise suppression tape 10 is spirally wound around the exposed outer peripheral surface of the inner covering body 3 at the terminal portion of the shielded cable 1 in a manner such that the other surface 11b of the insulator 11, which becomes the outer surface, is located on the outside, and the side portions of the central portion of the noise suppression tape 10 overlap, and one side 12a of the adhesive layer 12 and one side 13a of the conductive layer 13 are adhered to the exposed outer peripheral surface of the inner covering body 3.

[0076] At one end portion of the noise suppression tape 10 , the electrical connection portion 13 b of the conductive layer 13 is electrically connected to the surface of the shielding outer conductor 4 b of the shield conductor 4 of the shielded cable 1 .

[0077] Furthermore, at the other end portion of the noise suppression tape 10 , the electrical connection portion 13 c of the conductive layer 13 is electrically connected to the housing 51 .

[0078] As a result, the conductive layer 13 of the noise suppression tape 10 becomes a ground potential node, ie, grounded, over the entire area.

[0079] In Application Example 2, the central portion of the noise suppression band 10 is arranged so that the other side 11b of the insulator 11, which becomes the outer surface, is on the outside, and one side 12a of the adhesive layer 12 and one side 13a of the conductive layer 13 are bonded to the outer peripheral surface of the exposed inner covering body 3 at the end portion of the shielded cable 1 along the length direction of the shielded cable 1.

[0080] At one end portion of the noise suppression tape 10 , the electrical connection portion 13 b of the conductive layer 13 is electrically connected to the surface of the shielding outer conductor 4 b of the shield conductor 4 of the shielded cable 1 .

[0081] Furthermore, at the other end portion of the noise suppression tape 10 , the electrical connection portion 13 c of the conductive layer 13 is electrically connected to the housing 51 .

[0082] As a result, the conductive layer 13 of the noise suppression tape 10 becomes a ground potential node, ie, grounded, over the entire area.

[0083] Therefore, in embodiment 2, in addition to achieving the same effects as embodiment 1, electrical connection becomes easy because the electrical connection with the surface of the shielding outer conductor 4b and the electrical connection with the shell 51 are respectively performed through the wide electrical connection portion 13b and the electrical connection portion 13c.

[0084] Implementation 3

[0085] use Figure 6 and Figure 7 The noise suppression tape 20 according to the third embodiment will be described.

[0086] The noise suppression tape 20 includes a tape-shaped base 30 and an adhesive layer 40 that is bonded to and fixed to one surface of the base 30 and has the same length and width as the base 30 .

[0087] The base 30 includes an elongated insulator 31 and a conductor 32 .

[0088] Insulator 31 has one surface 31a, another surface 31b, one side surface, and another side surface. Conductor 32 has one surface 32a, another surface 32b, one side surface, and another side surface. Conductor 32 is the same length as insulator 31 and is arranged side by side with insulator 31. One side surface of conductor 32 is bonded to the other side surface of insulator 31 to secure it.

[0089] The insulator 31 is a flexible, tape-shaped insulating tape made of synthetic resin.

[0090] The conductor 32 is a flexible, belt-shaped conductive metal foil such as copper foil or aluminum foil, or a flexible, belt-shaped conductive tape obtained by impregnating a conductive adhesive into a porous non-conductive tape of nonwoven fabric.

[0091] The adhesive layer 40 includes an adhesive layer 41 and a conductive adhesive layer 42 .

[0092] The adhesive layer 41 has one surface 41 a , another surface 41 b , one side surface, and another side surface.

[0093] The conductive adhesive layer 42 has one surface 42 a , another surface 42 b , one side surface, and another side surface.

[0094] The conductive adhesive layer 42 is arranged in parallel with the adhesive layer 41 , and one side surface of the conductive adhesive layer 42 is bonded to the other side surface of the adhesive layer 41 .

[0095] One side surface of the adhesive layer 41 is flush with one side surface of the insulator 31 , and the other side surface of the conductive adhesive layer 42 is flush with the other side surface of the conductor 32 .

[0096] The adhesive layer 41 is an adhesive such as an epoxy resin adhesive, a hot melt adhesive, a rubber solvent adhesive, an elastic adhesive, or a phenolic resin adhesive.

[0097] The conductive adhesive layer 42 is a conductive adhesive obtained by mixing conductive metal or carbon fibers or powder into a binder such as epoxy resin adhesive, hot melt adhesive, rubber solvent adhesive, elastic adhesive, or phenolic resin adhesive.

[0098] The noise suppression tape 20 of the third embodiment is also similar to the noise suppression tape 10 of the first embodiment. Figure 3 Application Example 1 and Figure 4 The same is applied to Application Example 2 shown.

[0099] That is, in Application Example 1, the central portion of the noise suppression tape 20 is spirally wound around the exposed outer peripheral surface of the inner covering body 3 at the end portion of the shielded cable 1 in a manner such that the other side of the central portion of the noise suppression tape 20 overlaps with the other side of the base 30, that is, the other side 31b of the insulator 31 and the other side 32b of the conductor 32 are located on the outside, and one side of the adhesive layer 40, that is, the one side 41a of the adhesive layer 41, and the one side 42a of the conductive adhesive layer 42 are adhered to the exposed outer peripheral surface of the inner covering body 3.

[0100] At one end of the noise suppression tape 20 , one end of the conductive adhesive layer 42 in the adhesive layer 40 is electrically connected to the surface of the shielding outer conductor 4 b of the shield conductor 4 of the shielded cable 1 .

[0101] Furthermore, at the other end portion of the noise suppression tape 20 , the other end portion of the conductive adhesive layer 42 in the adhesive layer 40 is electrically connected to the housing 51 .

[0102] As a result, the conductive adhesive layer 42 in the adhesive layer 40 of the noise suppression tape 20 becomes a ground potential node, ie, grounded, over the entire area.

[0103] Furthermore, when the noise suppression tape 20 is spirally wound around the exposed outer peripheral surface of the inner cover 3, as shown in FIG. Figure 8 As shown, the side of the noise suppression tape 20 located on the upper layer overlaps with the side of the noise suppression tape 20 located on the lower layer, and the conductive adhesive layer 42 of the adhesive layer 40 in the noise suppression tape 20 located on the upper layer is bonded to the conductor 32 of the base 30 in the noise suppression tape 20 located on the lower layer.

[0104] As a result, the conductive adhesive layer 42 located on the upper layer and the conductor 32 located on the lower layer are grounded, and the conductor 32 in the noise suppression tape 20 is also grounded over the entire area.

[0105] Therefore, the conductor 32 and the conductive adhesive layer 42 of the noise suppression tape 20 form a shielding structure relative to the internal conductor 2 inside the exposed internal covering body 3 located at the end of the shielded cable 1, which has the effect of shielding noise, thereby suppressing the deterioration of shielding performance and noise resistance.

[0106] In addition, regarding the noise suppression tape 20, since one side 42a of the conductive adhesive layer 42 is exposed, it is easy to electrically connect one end of the conductive adhesive layer 42 to the shielding outer conductor 4b of the shielded cable 1, and to electrically connect the other end of the conductive adhesive layer 42 to the housing 51 of the communication device 50.

[0107] Moreover, when the noise suppression band 20 is spirally wound around the outer peripheral surface of the exposed internal covering body 3, capacitive coupling does not occur between the overlapping portions of the side portions of the noise suppression band 20 located on the upper layer and the side portions of the noise suppression band 20 located on the lower layer. Therefore, there will be no degradation of the signal transmission characteristics at a specific frequency of the high-frequency signal transmitted in the internal conductor 2 of the shielded cable 1 due to the influence of capacitive coupling.

[0108] In Application Example 2, the central portion of the noise suppression tape 20 is bonded to the outer peripheral surface of the exposed inner covering body 3 at the end portion of the shielded cable 1 along the longitudinal direction of the shielded cable 1 in such a manner that the other side of the base 30, i.e., the other side 31b of the insulator 31, and the other side 32b of the conductor 32 are located on the outside, and one side of the adhesive layer 40, i.e., the one side 41a of the adhesive layer 41, and one side 42a of the conductive adhesive layer 42 are bonded to the outer peripheral surface of the exposed inner covering body 3 at the end portion of the shielded cable 1.

[0109] At one end of the noise suppression tape 20 , one end of the conductive adhesive layer 42 in the adhesive layer 40 is electrically connected to the surface of the shielding outer conductor 4 b of the shield conductor 4 of the shielded cable 1 .

[0110] Furthermore, at the other end portion of the noise suppression tape 20 , the other end portion of the conductive adhesive layer 42 in the adhesive layer 40 is electrically connected to the housing 51 .

[0111] As a result, the conductive adhesive layer 42 in the adhesive layer 40 of the noise suppression tape 20 becomes a ground potential node, ie, grounded, over the entire area.

[0112] Furthermore, since the conductor 32 of the base 30 is partially bonded and fixed to the conductive adhesive layer 42 of the adhesive layer 40 , the conductor 32 in the noise suppression tape 20 also serves as a ground potential node, ie, grounded, over its entire area, similarly to the conductive adhesive layer 42 .

[0113] In Application Example 2 constructed in this way, as in Application Example 1, the portion of the shielded cable 1 where the internal covering body 3 is exposed has the effect of shielding the internal conductor 2 of the shielded cable 1 from noise. In addition, it is easy to electrically connect one end of the conductive adhesive layer 42 to the shielding outer conductor 4b of the shielded cable 1, and to electrically connect the other end of the conductive adhesive layer 42 to the housing 51 of the communication device 50.

[0114] Furthermore, it is possible to freely combine the various embodiments, modify any constituent elements of the various embodiments, or omit any constituent elements in the various embodiments.

[0115] Industrial applicability

[0116] The noise suppression tape of the present invention is preferably applied to a shielded cable that is connected to a communication device and transmits a high-frequency signal.

[0117] Description of labels

[0118] 1: Shielded cable; 2: Inner conductor; 3: Inner covering; 4: Shielded conductor; 4a: Resin layer; 4b: Outer conductor for shielding; 4c: Soft pigtail; 5: Outer covering; 10: Noise suppression tape; 11: Insulator; 12: Adhesive layer; 13: Conductive layer; 20: Noise suppression tape; 30: Base; 31: Insulator; 32: Conductor; 40: Adhesive layer; 41: Adhesive layer; 42: Conductive adhesive layer.

Claims

1. A noise suppression tape comprising a tape-shaped base and an adhesive layer, The strip-shaped base comprises: an elongated insulator having one side, another side, one side, and another side; and a conductor having one side, another side, one side, and another side, and having the same length as the insulator, the conductor and the insulator being arranged in parallel, and one side of the conductor being fixedly bonded to the other side of the insulator. The adhesive layer has the same length as that of the substrate, and the adhesive layer comprises: an adhesive layer having one side, another side, one side surface, and another side surface; and a conductive adhesive layer having one side, another side, one side surface, and another side surface, the conductive adhesive layer and the adhesive layer being arranged in parallel, one side surface of the conductive adhesive layer being bonded to the other side surface of the adhesive layer, one side surface of the adhesive layer and one side surface of the insulator being located on the same plane, the other side surface of the conductive adhesive layer and the other side surface of the conductor being located on the same plane, and the other side surface of the adhesive layer being bonded to one side surface of the substrate and fixed. The noise suppression tape spirally wound around the outer peripheral surface of the inner covering body of the exposed shielded cable has a portion where the side portion of the noise suppression tape located on the upper layer overlaps with the side portion of the noise suppression tape located on the lower layer. In the overlapping portion, the conductive adhesive layer of the adhesive layer in the noise suppression tape located on the upper layer is bonded to the conductor of the base located on the lower layer, and the conductor and the conductive adhesive layer form a shielding structure relative to the internal conductor located on the inner side of the inner covering body of the shielded cable.

2. A noise suppression tape adhered to the outer peripheral surface of an inner covering body exposed in a shielded cable, the shielded cable comprising an inner conductor for transmitting a signal, an inner covering body covering the entire outer peripheral surface of the inner conductor, a shield conductor covering the entire outer peripheral surface of the inner covering body, and an outer covering body covering the entire outer peripheral surface of the shield conductor, wherein at a terminal portion, the inner conductor protrudes from the inner covering body, the outer peripheral surface of the inner covering body is exposed, and the outer peripheral surface of the shield conductor is exposed. The noise suppression tape comprises a tape-shaped base and an adhesive layer. The strip-shaped base comprises: an elongated insulator having one side, another side, one side, and another side; and a conductor having one side, another side, one side, and another side, and having the same length as the insulator, the conductor and the insulator being arranged in parallel, and one side of the conductor being fixedly bonded to the other side of the insulator. The length of the adhesive layer is the same as that of the base, and the adhesive layer comprises: an adhesive layer having one side, another side, one side and another side; and a conductive adhesive layer having one side, another side, one side and another side, the conductive adhesive layer and the adhesive layer are arranged in parallel, one side of the conductive adhesive layer is bonded to the other side of the adhesive layer, one side of the adhesive layer and one side of the insulator are located on the same plane, the other side of the conductive adhesive layer and the other side of the conductor are located on the same plane, the other side of the adhesive layer is bonded to one side of the base and fixed, one side of the central part of the adhesive layer is bonded to the outer peripheral surface of the inner covering body of the shielded cable, one end of the conductive adhesive layer is electrically connected to the shielding conductor of the shielded cable, and the other end of the conductive adhesive layer is electrically connected to the ground potential node.

3. The noise suppression tape according to claim 2, wherein: The central portion of the base and the central portion of the adhesive layer are spirally wound around the outer peripheral surface of the inner covering of the shielded cable so that the side portions of the central portion of the base and the central portion of the adhesive layer overlap.

4. The noise suppression tape according to claim 2, wherein The central portion of the base body and the central portion of the adhesive layer are adhered to the outer peripheral surface of the inner covering body of the shielded cable along the longitudinal direction.

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