JP5938342B2 - Connector with sheet - Google Patents

Description

  The present invention relates to a connector with a sheet.

  2. Description of the Related Art Conventionally, a shielded connector whose periphery is covered with a shield plate has been used in order to suppress the influence of noise received by signals flowing through terminals and the like (see, for example, Patent Document 1).

  FIG. 14 is a side view of a conventional shielded connector.

  In the figure, reference numeral 811 denotes a shielded connector housing mounted on a circuit board 891, which is a member made of an insulating synthetic resin. The housing 811 includes a cylindrical sleeve 814 and a rectangular parallelepiped main body 815 connected to the rear end of the sleeve 814. An insertion port (not shown) through which the mating connector is inserted is formed from the sleeve 814 to the main body 815. Further, a plurality of terminals 861 are disposed on the sleeve 814 and the main body 815. The tail portion 862 of the terminal 861 is inserted into a through hole 892 formed in the circuit board 891 and penetrates the circuit board 891.

  The circuit board 891 is disposed in a housing of an electronic device (not shown). Reference numeral 895 denotes a metal chassis included in the electronic device.

  The front surface and the left and right side surfaces of the housing 811 are covered with a shield plate 871. Reference numeral 816 denotes a locking groove formed on a side surface of the housing 811. A locking claw (not shown) provided in the shield plate 871 is locked, thereby fixing the shield plate 871 to the housing 811. . The shield plate 871 includes a contact piece 873 extending downward and a pressing piece 872 extending forward. The contact piece 873 is inserted into the through hole 892 connected to the ground pattern and penetrates the circuit board 891. Further, the pressing piece 872 is in contact with the metal chassis 895.

  Further, a shield absorbing elastic plate 875 is disposed so as to cover the lower surface of the housing 811. The shield absorbing elastic plate 875 is a rectangular plate formed by alternately laminating a rubber-like shield layer and a radio wave absorbing layer in which magnetic powder having a high magnetic flux density and soft magnetism is dispersed and laminated in a rubber material. It is a shaped member. The contact piece 873 is inserted into an insertion hole formed in the shield absorption elastic plate 875 and passes through the shield absorption elastic plate 875.

  In this way, the shield plate 871 covers the left and right side surfaces of the housing 811 to prevent noise, and the shield absorbing elastic plate 875 blocks high frequency noise from entering and exiting the lower surface of the housing 811, thereby reliably preventing noise generation. can do.

Japanese Patent Laid-Open No. 11-245783

  However, in the conventional connector, since the shield plate 871 and the shield absorption elastic plate 875 need to be attached so as to cover the housing 811, the structures of the shield plate 871 and the shield absorption elastic plate 875 are complicated. Further, since the shield plate 871 and the shield absorbing elastic plate 875 need to be connected to the ground pattern of the circuit board 891 and the metal chassis 895 of the electronic device and grounded, the structures of the shield plate 871 and the shield absorbing elastic plate 875 are complicated. End up. Further, when a connector is used to connect a high-frequency signal circuit, the periphery of the terminal 861, which is a high-frequency signal transmission path, is covered with a shield plate 871 having a large area, so that so-called signal integrity is affected and the high-frequency signal is transmitted. Distortion (distortion) occurs in the signal waveform.

  The present invention solves the problems of the conventional connector by laminating a soft magnetic layer having a real part of 100 MHz relative permeability of 20 to 45 and a conductive dielectric layer of 0.5 to 20 Ω · cm. By attaching a sheet with a structure to the housing, it is possible to reliably suppress noise and suppress the impact on signal integrity, while being a simple structure, low cost, and durable An object of the present invention is to provide a highly reliable connector with a sheet.

  Therefore, in the connector with a sheet of the present invention, a housing that fits (mates) with the mating connector, a terminal that is held by the housing and contacts the mating terminal of the mating connector, and is affixed to the housing. A connector with a sheet having a sheet, the sheet having a layer structure formed by laminating a soft magnetic layer and a conductive dielectric layer.

  In another connector with a sheet of the present invention, the sheet is further affixed to the outer surface of the housing so as to cover at least a portion corresponding to a position directly above the contact portion between the terminal and the counterpart terminal.

  In still another connector with a sheet according to the present invention, the sheet is affixed to an outer surface of the housing, excluding a fitting surface and a mounting surface.

  In still another connector with a sheet according to the present invention, the housing is made of a dielectric material, and the dielectric constant of the conductive dielectric layer is higher than the dielectric constant of the housing.

  In still another connector with a sheet according to the present invention, the sheet is laminated such that a conductive dielectric layer is present adjacent to the housing and a magnetic layer is present adjacent to the conductive dielectric layer. .

  In still another connector with a sheet according to the present invention, the mating connector is a cable or a connector.

  In still another connector with a sheet of the present invention, the soft magnetic powder used for the soft magnetic layer is made of a flat soft magnetic metal powder, and the conductive filler used for the conductive dielectric layer is made of conductive carbon fiber. .

  According to the present invention, the connector with a sheet has a layer structure formed by laminating a soft magnetic layer having a real part having a relative permeability of 100 MHz of 20 to 45 and a conductive dielectric layer having an electric resistance of 0.5 to 20 Ω · cm. A provided sheet is affixed to the housing. Thereby, although it is a simple structure, a noise can be suppressed reliably and the influence on signal integrity can be suppressed. Further, the cost is low, the durability is high, and the reliability can be improved.

It is a perspective view of the connector with a sheet in a 1st embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a four-view figure of the connector with a sheet | seat in the 1st Embodiment of this invention, (a) is a top view, (b) is a front view, (c) is a side view, (d) is a rear view. It is sectional drawing of the connector with a sheet | seat in the 1st Embodiment of this invention, Comprising: It is AA arrow sectional drawing in FIG. 2, (a) is a figure of the state which has not connected the cable, (b) is It is a figure of the state which connected the cable. It is a schematic cross section which shows the layer structure of the sheet | seat in the 1st Embodiment of this invention. It is a figure explaining the outline | summary of the apparatus for measuring the electric field strength and magnetic field strength of the connector vicinity which stuck the sheet | seat in the 1st Embodiment of this invention. It is a table | surface which shows the measured value of the electric field strength in the vicinity of the connector which stuck the sheet | seat in the 1st Embodiment of this invention, magnetic field strength, and reflection (S11). It is a perspective view of the connector with a sheet in a 2nd embodiment of the present invention, (a) is a figure showing the state after sticking a sheet, (b) is a figure showing the state before sticking a sheet. is there. It is a three-view figure of the connector with a sheet | seat in the 2nd Embodiment of this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is sectional drawing of the connector with a sheet | seat in the 2nd Embodiment of this invention, Comprising: It is BB arrow sectional drawing in FIG. It is a perspective view of the connector with a sheet in a 3rd embodiment of the present invention, (a) is a figure showing the state after sticking a sheet, (b) is a figure showing the state before sticking a sheet. is there. It is a three-view figure of the connector with a sheet | seat in the 3rd Embodiment of this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is a figure explaining the fitting operation | work of the connector with a sheet | seat in the 3rd Embodiment of this invention, and a counterpart connector, (a) is a perspective view which shows a counterpart connector, (b) is a perspective view which shows a connector with a sheet | seat. FIG. 4C is a perspective view showing a state in which the connector with sheet and the mating connector are fitted. It is a figure which shows the state which the connector with a sheet | seat and the other party connector in the 3rd Embodiment of this invention fit, Comprising: (a) is a top view, (b) is sectional drawing, C in (a) It is -C arrow sectional drawing. It is a side view of the conventional connector with a shield.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 is a perspective view of a connector with a sheet according to the first embodiment of the present invention, FIG. 2 is a four-view diagram of the connector with a sheet according to the first embodiment of the present invention, and FIG. 3 is a first embodiment of the present invention. It is sectional drawing of the connector with a sheet | seat in this form, Comprising: It is AA arrow sectional drawing in FIG. 2A is a top view, FIG. 2B is a front view, FIG. 2C is a side view, FIG. 3D is a rear view, and FIG. 3A is a cable not connected. The state figure and (b) are the figures of the state which connected the cable.

  In the figure, reference numeral 1 denotes a connector as a connector with a sheet according to the present embodiment, specifically, a cable connector. The connector 1 is mounted on a surface of a board such as a circuit board (not shown) and is called a flexible circuit board or a flexible flat cable. The connector 1 is fitted with a flat cable 101 as a mating connector, and the flat cable 101 It is used to electrically connect to a conductive wire (not shown) as a counterpart terminal provided. The flat cable 101 is, for example, a flat flexible cable called FPC, FFC or the like, but any type of flat cable having conductive wires can be used. There may be.

  In the present embodiment, expressions indicating directions such as upper, lower, left, right, front, rear, etc. used for explaining the configuration and operation of each part of the connector 1 are not absolute but relative. This is appropriate when the connector 1 is in the posture shown in the figure, but when the posture of the connector 1 is changed, it should be interpreted according to the change in the posture.

  The connector 1 is integrally formed of a housing 11 integrally formed of a dielectric material such as a synthetic resin and a conductive material such as a metal, and is held by the housing 11 and is electrically connected to the flat cable 101. And a plurality of terminals 61 that are electrically connected to each other.

  The housing 11 is formed between the lower part 12, the upper part 15, the left and right side parts 16, and the lower part 12, the upper part 15 and the side part 16, and is flat from the front (left side in FIG. 2 (c)). The insertion port 33 as a fitting part for inserting and fitting the end part of the cable 101 is provided. The lower surface of the lower part 12 is a mounting surface facing the surface of the substrate on which the connector 1 is mounted. In the present embodiment, for convenience, the inlet side surface of the insertion port 33, that is, the fitting surface is referred to as the connector 1 or the front surface 11a of the housing 11, and the inner surface of the insertion port 33 is referred to as the connector 1 or the housing. 11 is referred to as a rear surface 11b.

  The housing 11 is formed with a plurality of terminal receiving grooves 14 into which the terminals 61 are loaded. For example, a total of seven terminal receiving grooves 14 with a pitch of about 0.5 mm are formed, and one terminal 61 is loaded in each terminal receiving groove 14. As shown in FIG. 3A, each terminal 61 extends in the front-rear direction, and has a main body 66 fixed in the terminal receiving groove 14, and extends obliquely rearward from the front end of the main body 66. It has an upper arm portion 65 that protrudes and a tail portion 68 as a substrate connecting portion that extends rearward from the rear end of the main body portion 66. Note that it is not always necessary to load the terminals 61 in all the terminal receiving grooves 14, and the terminals 61 can be omitted as appropriate in accordance with the arrangement of the conductive wires of the flat cable 101.

  The tail portion 68 extends rearward from the rear surface 11b of the housing 11, and is fixed to a connection pad (not shown) whose bottom surface is formed on the surface of the substrate by a conductive fixing means such as soldering. Thereby, the terminal 61 is electrically connected to a conductive trace (not shown) connected to the connection pad. Further, the free end, that is, the tip of the upper arm portion 65 functions as a contact portion 65 a that contacts the lower surface of the flat cable 101.

  The flat cable 101 includes a substrate portion that is a dielectric thin plate member having an elongated strip shape, and a plurality of conductive wires (not shown) arranged on one surface of the substrate portion. In FIG. 3 (b), only the vicinity of the tip portion inserted into the insertion port 33 of the connector 1 in the flat cable 101 is shown, and the other portions are omitted. Further, the conductive wire is a foil-like linear body made of a conductive metal such as copper, and is arranged in parallel at a predetermined pitch, for example, about 0.5 mm. Although the surface is covered with a film-like insulating layer showing electrical insulation, the insulating layer is removed within a range extending from the front end of the flat cable 101 to a predetermined length, and the conductive wire surface Is exposed and functions as a counterpart terminal. Then, it is assumed that the conductive wire is inserted into the insertion port 33 such that the exposed surface is on the lower side.

  Here, since the upper arm portion 65 is not restrained in the vertical direction in the terminal receiving groove 14, it can be displaced in the vertical direction. Therefore, the upper arm portion 65 functions as a cantilever-shaped spring member whose tip is a free end. Thereby, the contact portion 65a can be elastically displaced in the vertical direction by the function of the upper arm portion 65 as a spring member. Therefore, the contact portion 65a is pressed against the conductive wire as the counterpart terminal exposed on the lower surface of the flat cable 101 by the spring force exerted by the upper arm portion 65, so that the contact with the conductive wire is reliably maintained. .

  Further, on the side portion 16 of the housing 11, an auxiliary mounting metal 71 for attaching the connector 1 to the board is attached. The mounting auxiliary metal fitting 71 is preferably formed by punching or bending a metal plate, and the bottom surface of the lower end functions as a connection surface connected to the surface of the substrate. The member is fixed to the surface of the substrate by fixing means such as soldering, and fixes the housing 11 to the substrate. Thereby, attachment to the board | substrate of the connector 1 becomes strong and it prevents that the connector 1 remove | deviates from a board | substrate. One end of the main body of the auxiliary fitting for mounting 71 is housed and fixed in an auxiliary fitting fixing recess 16 a formed in the side portion 16 of the housing 11.

  In the present embodiment, a sheet 41 is attached to the upper surface of the upper portion 15 of the housing 11. Since the sheet 41 is a member that suppresses noise, it is desirable that the sheet 41 be affixed to a location where noise is most likely to occur or a location that is most affected, that is, a location close to a contact location between the terminal 61 and the counterpart terminal. It is. In consideration of the ease of the pasting operation, it is desirable to stick the sheet 41 to the outer surface of the housing 11. Further, since the connector 1 is mounted on the surface of a board (not shown) and the flat cable 101 is inserted and fitted, it is substantially impossible to attach the sheet 41 to the mounting surface and the fitting surface of the housing 11. Is impossible. As can be seen from FIG. 3B, the contact portion 65 a of the terminal 61 is in contact with the conductive wire of the flat cable 101 as the counterpart terminal at a position close to the upper portion 15 of the housing 11. Therefore, in the present embodiment, the sheet 41 is attached to the upper surface of the upper portion 15 of the housing 11.

  In the example shown in the figure, the sheet 41 is affixed so as to cover substantially the entire upper surface of the upper portion 15, but does not necessarily need to cover the entire upper surface of the upper portion 15. What is necessary is just to cover the part corresponding directly above the contact location with the conductive wire of the flat cable 101 as a counterpart terminal.

  That is, in the example shown in FIG. 3, the sheet 41 covers the range from the front end to the rear end on the upper surface of the upper portion 15, but the conductive portion serving as a counterpart terminal where the contact portion 65 a is exposed on the lower surface of the flat cable 101. The sheet 41 may cover only the portion of the upper surface of the upper portion 15 located immediately above the portion in contact with the line. In other words, the sheet | seat 41 should just be affixed on the upper surface of the upper part 15 so that the part corresponding to just above the contact location of the terminal 61 and the other party terminal may be covered.

  Moreover, you may stick the sheet | seat 41 not only to the upper surface of the upper part 15, but the side surface of the side part 16, the rear surface 11b, etc., for example. That is, if the sheet 41 is affixed to the upper surface of the upper portion 15 so as to cover at least a portion corresponding to the position directly above the contact portion between the terminal 61 and the counterpart terminal, the other portion (mounting on the outer surface of the housing 11) It may be further affixed to (except the surface and the fitting surface). In other words, if the sheet 41 is attached so as to cover at least a portion corresponding to the outer surface of the housing 11 and directly above the contact portion between the terminal 61 and the counterpart terminal, the sheet 41 is attached to the other portion of the outer surface of the housing 11. Further, it may be affixed.

  Next, the configuration of the sheet 41 will be described in detail.

  The sheet according to the present invention is an electromagnetic interference suppressor in which a soft magnetic layer made of soft magnetic powder and a resin is laminated on a conductive dielectric layer made of a conductive filler and a resin, and the surface electric resistance of the conductive dielectric layer is The electromagnetic interference suppressor, characterized in that the real part of the complex relative permeability at 100 MHz of the soft magnetic layer is 0.5 to 20 Ω · cm, and 20 to 45.

  FIG. 4 is a schematic cross-sectional view showing the layer structure of the sheet in the first embodiment of the present invention.

  As shown in the figure, the sheet 41 has a two-layer structure in which a soft magnetic layer 42 and a conductive dielectric layer 43 are laminated. An adhesive layer 44 is added below the conductive dielectric layer 43, and a peel-off release sheet 45 is added below the adhesive layer 44. The sheet 41 is added for the sake of convenience for attaching the sheet 41 to the outer surface of the housing 11, and the release paper 45 is provided for the convenience of preventing the adhesive layer 44 from unnecessarily adhering to other members. Any of these may be omitted as appropriate. The thickness of the sheet 41 is, for example, about 100 [μm], but can be changed as appropriate. Furthermore, the sheet 41 can be cut into an arbitrary planar shape and an arbitrary size. In this embodiment, a sheet having a two-layer structure of a soft magnetic layer and a conductive dielectric layer is provided. However, a plurality of soft magnetic layers, a plurality of conductive dielectric layers, or a combination thereof may be used. Any sheet that includes at least one soft magnetic layer and one conductive dielectric layer may be used.

  The soft magnetic layer 42 is made of a material in which a matrix (base material) made of resin is filled with a magnetic material, and the conductive dielectric layer 43 is made of a material in which a matrix made of resin is filled with a dielectric. The resin that is a matrix of the soft magnetic layer 42 and the conductive dielectric layer 43 is a thermosetting resin, such as an epoxy resin, a phenol resin, or a polyester resin. The magnetic material of the soft magnetic layer 42 is ferrite such as magnetite (magnetite), Ni—Zn-based ferrite, Mn—Zn-based ferrite, Sendust, silicon steel, or carbonyl iron. The dielectric of the conductive dielectric layer 43 is conductive carbon or graphite. Further, the binder of the soft magnetic layer 42 and the conductive dielectric layer 43 is a phenol resin adhesive, and a solder reflow process of about 240 [° C.] is performed when the connector 1 with the sheet 41 attached is mounted on the substrate. The heat-resistant temperature is about 160 [° C.] so that it can withstand. When the heat resistant temperature is low, a styrene thermoplastic elastomer, an olefin thermoplastic elastomer, a polyester thermoplastic elastomer, a polyamide thermoplastic elastomer, a urethane thermoplastic elastomer, a silicone elastomer, or the like may be used.

  Further, in the present embodiment, the soft magnetic layer 42 and the conductive dielectric layer so as to withstand the solder reflow process of about 240 [° C.] performed when the connector 1 with the sheet 41 attached is mounted on the substrate. The soft magnetic layer 42 and the conductive dielectric layer 43 may be joined by any method, for example, using an adhesive (phenolic resin adhesive or the like). May be.

  The adhesive layer 44 is made of an acrylic resin adhesive or an epoxy resin adhesive. The pressure-sensitive adhesive layer 44 made of an acrylic resin adhesive has a relatively low heat resistance temperature of about 80 [° C.], has a relatively low pressure-sensitive adhesive force, and further has a surface on the conductive dielectric layer 43 side (upper side surface in the figure). ) And the surface affixed to the housing 11 (the lower surface in the figure) have different adhesive forces, the latter being weaker and more easily peeled off. On the other hand, the pressure-sensitive adhesive layer 44 made of an epoxy resin adhesive, which is a thermosetting resin-type adhesive, has a relatively high heat resistance temperature and is about 160 [° C.] so that it can withstand a solder reflow process of about 240 ° C. In addition, the adhesive strength is relatively strong.

  The arrangement of the soft magnetic layer 42 and the conductive dielectric layer 43 in the sheet 41 is as follows. From the side of the adhesive layer 44 that adheres to the outer surface of the housing 11, the soft magnetic layer is next to the conductive dielectric layer 43. 42. That is, the conductive dielectric layer 43 exists adjacent to the housing 11 made of a dielectric material and the soft magnetic layer 42 exists adjacent to the conductive dielectric layer 43 with the sheet 41 attached to the outer surface of the housing 11. The soft magnetic layer 42 has a real part μr ′ of a permeability of 100 MHz in the range of 20 to 45, and the conductive dielectric layer has an electric resistance value of 0 according to the four-probe method (JIS K 7194-1994). 5 to 20 Ω · cm.

  The dielectric constant of the conductive dielectric layer 43 is set to be higher than the dielectric constant of the housing 11. The relative dielectric constant real part (εr ′) of the conductive dielectric layer 43 is 50 to 160 when measured at a frequency of 1 [GHz]. The measurement of magnetic permeability and dielectric constant was performed by measuring a cylindrical donut-shaped measurement molded body having an outer diameter of 7 [mm], an inner diameter of 3 [mm], and a thickness of 1.4 to 2.5 [mm] by coaxial tube S-parameter measurement. Looking for.

  By sticking the sheet 41 having such a structure to the outer surface of the housing 11 so as to cover at least the portion of the outer surface of the housing 11 that is closest to the contact portion between the terminal 61 and the counterpart terminal, the terminal 61 and the counterpart Noise generated by transmitting a signal to the terminal can be effectively suppressed. The sheet 41 is not connected to a ground line (not shown) included in the flat cable 101, a ground line included in a board (not shown), a metal chassis of a device on which the board is mounted, or the like. That is, the sheet 41 is not grounded.

  Here, when a sheet is attached to the signal transmission line, the transmission signal reflection (S11) and the electric field strength and magnetic field strength in the vicinity have a trade-off relationship. That is, reflection (S11) increases according to the impedance change caused by sticking the sheet to the housing, so that the transmission signal is attenuated. As a result, the electric field strength and magnetic field strength in the vicinity of the connector 1 are reduced. The increase becomes an obstacle to signal transmission. On the other hand, when the sheet having a finite size resonates with a quarter wavelength of the signal propagating to the transmission line, the attached sheet radiates the antenna, so that the electric field strength and magnetic field strength in the vicinity are increased.

  As a result of intensive studies, the inventor of the present invention has realized a connector structure that suppresses reflection (S11) to −10 dB or less, reduces electric field strength and magnetic field strength in the vicinity, and further suppresses antenna radiation.

  Next, an experimental example using the sheet 41 will be described.

  FIG. 5 is a diagram for explaining the outline of an apparatus for measuring the electric field strength and magnetic field strength in the vicinity of the connector to which the sheet is attached according to the first embodiment of the present invention, and FIG. 6 is a measurement value according to the embodiment of the present invention. It is a table | surface which shows.

  Using the apparatus shown in FIG. 5, when the sheet 41 was stuck on the upper surface of the upper part 15 of the housing 11, the attenuation and reflection (S11) of the electric field strength and magnetic field strength in the vicinity of the connector 1 were measured.

  In the figure, reference numeral 80 denotes an inspection target part, which includes a pair of substrates 91, a connector 1 mounted on the surface of each substrate 91, and a flat cable 101 having both ends connected to each connector 1. And the sheet | seat 41 is affixed on the upper surface of the upper part 15 of the housing 11 in the connector 1 of one side (left side in a figure).

  Further, a signal generator 81 is connected to one of the conductive traces 92 of the substrate 91 through which the tail portion 68 of the terminal 61 of the connector 1 is conducted. The signal generator 81 is a device that generates a signal having a predetermined frequency. As a result, a single conductive trace 92, a terminal 61 connected to the conductive trace 92, and a flat plate shape in contact with the terminal 61 are provided. A signal having a predetermined frequency is transmitted through the conductive wire of the cable 101.

  The electric field strength and magnetic field strength in the vicinity of the connector 1 are detected by the probe 85 and transmitted to an EMI (Electro Magnetic Interference) tester 82 that is a measuring device. By measuring and comparing the electric field strength and magnetic field strength in the vicinity of the connector 1 to which the sheet 41 is affixed and the electric field strength and magnetic field strength in the vicinity of the connector 1 to which the sheet 41 is not affixed, the electric field by the sheet 41 is measured. The attenuation of strength and magnetic field strength can be measured.

  Reference numeral 83 denotes a spectrum analyzer connected to the EMI tester 82, which can display the frequency distribution of the electric field strength and magnetic field strength detected by the probe 85. Reference numeral 84 denotes a terminal device such as a personal computer connected to the EMI tester 82 and the spectrum analyzer 83. The terminal device 84 controls the operation of the EMI tester 82 and the spectrum analyzer 83, and also measures the measurement data of the EMI tester 82 and the spectrum analyzer 83. Is stored in the storage means.

  In the production of the sheet, conductive carbon fiber (hereinafter referred to as carbon fiber) was mixed with a styrene-based thermoplastic elastomer. In the present invention, carbon fibers (fiber diameter of 1-2 μm, length of about 300 μm, specific gravity of 2.3) were used.

The conductive dielectric sheet was prepared by adding carbon fiber to a solution obtained by dissolving a styrene thermoplastic elastomer in an organic solvent cyclohexanone and stirring and mixing with a homomixer to prepare a liquid paint. It is applied to a polyester film so that the thickness after solvent drying is 30 μm, and after the solvent is dried, it is pressure-molded at a temperature of 120 ° C. and a pressure of 100 kg / cm ² , and the electric resistance is 0.5 Ω · cm, 2.0 Ω · cm, A five-level conductive dielectric sheet of 5.0 Ω · cm, 10.0 Ω · cm, 14.0 Ωcm, and a thickness of 20 μm was obtained. In addition, in order to change an electrical resistance, content of electroconductive carbon fiber was changed.

  For the magnetic sheet, soft magnetic flat metal powder (Fe-Si-Al alloy, average plate diameter of 40 μm, average thickness of 1 μm) is added in the same way as the conductive dielectric sheet, mixed with the styrene thermoplastic elastomer, pressed after coating and drying An 80 μm magnetic sheet, a three-level magnetic sheet, was produced. The real part μr ′ of the complex relative permeability at 100 MHz of the magnetic sheet was 25, 30, and 40. In order to change the complex relative permeability, the content of the soft magnetic flat metal powder was changed.

  The electric field strength, magnetic field strength, and reflection (S11) in the vicinity when the sheet obtained by laminating the obtained conductive dielectric sheet and soft magnetic sheet was attached to the upper portion of the connector housing 11 were measured.

  FIG. 6 shows the configurations of the sheets of Examples 1 to 6 and Comparative Examples 1 to 5, and the electric field strength, magnetic field strength, and reflection in the vicinity of the laminated sheet 41 made of a conductive dielectric sheet and a soft magnetic sheet attached to the connector housing (S11). ) Is shown.

  The measured values and attenuation shown in the examples are based on the state in which the sheet is not affixed, the unit is (dB), the − (minus) symbol indicates the attenuation, and the positive symbol is the antenna radiation. Furthermore, the unit indicating reflection (S11) is (dB).

Example 1)
When a sheet 41 having a conductive dielectric sheet thickness of 20 μm, an electric resistance of 14 Ω · cm, a soft magnetic sheet thickness of 80 μm, and a 100 MHz permeability μr ′ of 25 laminated on the top of the housing 11 is applied, 0 to -2.2 dB attenuation, magnetic field strength of 100 to 3000 MHz is 0 to -2.1 dB attenuation, and there is no antenna radiation in all frequency bands. The reflection (S11) at 100 to 3000 MHz was −13.1 to −21.1 dB, signal transmission was not a problem, and excellent characteristics were exhibited.

Example 2)
When a sheet 41 having a conductive dielectric sheet thickness of 20 μm, an electric resistance of 5 Ω · cm, a soft magnetic sheet thickness of 80 μm, and a 100 MHz permeability μr ′ of 30 laminated on the top of the housing 11 is applied, The attenuation of −0.1 to −1.8 dB is shown, the magnetic field intensity of 100 to 3000 MHz is −0.2 to −3.0 dB, and there is no antenna radiation in all frequency bands. The reflection (S11) at 100 to 3000 MHz was −11.2 to −18.4 dB, signal transmission was not a problem, and excellent characteristics were exhibited.

Example 3)
When a sheet 41 having a conductive dielectric sheet thickness of 20 μm, an electrical resistance of 10 Ω · cm, a soft magnetic sheet thickness of 80 μm, and a 100 MHz permeability μr ′ of 40 laminated on the top of the housing 11 is applied, 0 to -2.6 dB, the magnetic field strength of 100 to 3000 MHz is 0 to -2.0 dB, and there is no antenna radiation in all frequency bands. The reflection (S11) at 100 to 3000 MHz was −14.3 to −22.1 dB, signal transmission was not a problem, and excellent characteristics were exhibited.

Example 4)
When a sheet 41 having a conductive dielectric sheet thickness of 20 μm, an electric resistance of 2 Ω · cm, a soft magnetic sheet thickness of 80 μm, and a 100 MHz permeability μr ′ of 40 laminated on the upper portion of the housing 11 is attached to the upper portion of the housing 11, The attenuation of −0.1 to −2.7 dB is shown, the magnetic field intensity of 100 to 3000 MHz is 0 to −3.1 dB, and there is no antenna radiation in all frequency bands. The reflection (S11) at 100 to 3000 MHz was −12.8 to −20.2 dB, signal transmission was not a problem, and excellent characteristics were exhibited.

Example 5)
Conductive dielectric sheet thickness of 20 μm, electric resistance of 0.5 Ω · cm and soft magnetic sheet thickness of 80 μm, 100 MHz magnetic permeability μr ′ of 40 is laminated on the top of the housing 11 and the electric field of 100 to 3000 MHz in the vicinity of the housing 11 The intensity shows an attenuation of -1.2 to -4.0 dB, the magnetic field intensity of 100 to 3000 MHz is an attenuation of -1.0 to -3.0 dB, and there is no antenna radiation in all frequency bands. The reflection (S11) at 100 to 3000 MHz was -10. 4 to -19.3 dB, signal transmission was not a problem, and excellent characteristics were exhibited.

Comparative Example 1)
The electric field strength, magnetic field strength, and reflection (S11) in the vicinity of the housing when a 20 μm thick foil made of a conductive metal made of copper was attached to the housing 11 were measured. As a result, since the reflection S11 of 100 to 3000 MHz is as large as -1.6 to -8.7 dB, the signal integrity is lowered.

Comparative Example 2)
As in Comparative Example 1, a 20 μm thick foil made of a conductive metal made of copper was attached to the housing 11, and the electric field strength, magnetic field strength and reflection (S11) in the vicinity of the housing when the copper foil and ground were connected were measured. did. As a result, the reflection S11 of 100 to 3000 MHz is -2.7 to -18.5 dB, and the effect of ground connection is recognized, but the signal integrity is reduced because there is a band with a large reflection (S11).

Comparative Example 3)
The electric field strength, magnetic field strength, and reflection S11 in the vicinity of 100 to 3000 MHz when a conductive dielectric sheet with a high addition of conductive carbon fiber, a thickness of 30 μm, and an electrical resistance of 0.3 Ω · cm were attached to the top of the housing 11 were measured. The reflection S11 is -5.3 to -13.1 dB, and the signal integrity is lowered as in Comparative Examples 1 and 2.

Comparative Example 4)
The electric field strength, magnetic field strength, and reflection S11 in the vicinity of 100 to 3000 MHz when a single layer of conductive dielectric sheet (no soft magnetic sheet) of Example 5 and a thickness of 20 μm was attached to the top of the housing 11 were measured. The reflection S11 is -7.9 to -9.2 dB, and the signal integrity is lowered as in Comparative Examples 1 and 2.

Comparative Example 5)
Single layer of soft magnetic sheet (no conductive dielectric sheet) with high addition of soft magnetic flat metal powder (Fe-Si-Al alloy, average plate diameter 40 μm, average thickness 1 μm), 100 μm thickness, 100 MHz complex relative permeability real number When the part μr′100 was attached to the upper part of the housing 11, the electric field strength and magnetic field strength near 100 to 3000 MHz and the reflection S11 were measured. The reflection S11 is -12.7 to -19.3 dB, the electric field strength in the vicinity is 0.6 to -4.4, the magnetic field strength in the vicinity is 1.7 to -6.0, and magnetic field radiation was confirmed at 3000 MHz. .

  Various characteristics of the obtained sheet are shown in FIG.

  In the sheet according to the present invention, the attenuation is −0.7 to −4.0 dB at an electric field strength of 3000 MHz, and −1.4 to −3.0 dB at the magnetic field strength, which attenuates both the electric field and the magnetic field. It is. The reflection S11 is smaller than -15.0 dB, and the overall balance is excellent.

Thereby, although it is a simple structure, a noise can be suppressed reliably and the influence on signal integrity can be suppressed. In order to further improve the performance and adjust the suppression frequency, for example, a plurality of the laminated sheets may be laminated, or the thickness of each layer may be adjusted.
Moreover, the cost of the connector 1 can be reduced, durability can be improved, and reliability can also be improved.

  The sheet 41 is laminated so that the conductive dielectric layer 43 exists adjacent to the housing 11 and the soft magnetic layer 42 exists adjacent to the conductive dielectric layer 43. Therefore, the electric field strength and magnetic field strength in the vicinity of the connector 1 can be effectively attenuated, and noise can be reliably suppressed.

  Furthermore, the sheet | seat 41 is affixed on the outer surface of the housing 11 so that at least the part corresponding to just above the contact location of the terminal 61 and the conductive wire as a counterpart terminal may be covered. Thereby, the sheet | seat 41 can be arrange | positioned in the site | part close | similar to the contact location of the terminal 61 and conductive wire which are easy to generate | occur | produce a noise, and a noise can be suppressed more effectively.

  Further, the sheet 41 is affixed to the outer surface of the housing 11 except for the fitting surface and the mounting surface. Thereby, the sheet | seat 41 can be stuck easily and the cost of the connector 1 can be reduced.

  Further, the housing 11 is made of a dielectric material, and the dielectric constant of the conductive dielectric layer 43 is higher than the dielectric constant of the housing 11. Thereby, the electric field strength in the vicinity of the connector 1 can be effectively attenuated, and noise can be more reliably suppressed.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol. The description of the same operation and the same effect as those of the first embodiment is also omitted.

  7 is a perspective view of a connector with a sheet according to the second embodiment of the present invention, FIG. 8 is a three-view diagram of the connector with a sheet according to the second embodiment of the present invention, and FIG. 9 is a second embodiment of the present invention. It is sectional drawing of the connector with a sheet | seat in this form, Comprising: It is BB arrow sectional drawing in FIG. 7A is a diagram illustrating a state after the sheet is pasted, FIG. 7B is a diagram illustrating a state before the sheet is pasted, and FIG. 8A is a top view. b) is a front view, and (c) is a side view.

  In the figure, reference numeral 201 denotes a connector as a connector with a sheet in the present embodiment, and specifically, a cable connector. The connector 201 is mounted on a surface of a board such as a circuit board (not shown), and is fitted to the flat cable 101 as the counterpart connector, and is provided in the flat cable 101 as in the first embodiment. Used to electrically connect to a conductive wire (not shown) as a counterpart terminal.

  The connector 201 is integrally formed with a housing 211 integrally formed of a dielectric material such as a synthetic resin and a conductive material such as metal, and is electrically connected to a conductive wire (not shown) of the flat cable 101. And a plurality of terminals 261. The housing 211 includes a fixed housing main body 217 and an actuator 221 attached to the housing main body 217 so that the posture can be changed. That is, the actuator 221 rotates and changes its posture, and is attached to the housing body 217 so as to be in an open position as a first position and a closed position as a second position.

  The housing body 217 is formed between the lower part 212, the upper part 215, the left and right side parts 216, and the lower part 212, the upper part 215 and the side part 216, and from the front (left side in FIG. 8C). An insertion port 233 is provided as a fitting portion for inserting and fitting the end portion of the flat cable 101. The lower surface of the lower portion 212 is a mounting surface facing the surface of the substrate on which the connector 201 is mounted. In the present embodiment, for convenience, the inlet side surface of the insertion port 233, that is, the fitting surface is called the connector 201 or the front surface 211a of the housing 211, and the rear side surface of the insertion port 233 is called the connector 201 or the housing. 211 is referred to as a rear surface 211b.

  The housing body 217 has a plurality of terminal receiving grooves 214 into which the terminals 261 are loaded. For example, a total of 14 terminal receiving grooves 214 with a pitch of about 0.5 mm are formed, and one terminal 261 is loaded in each terminal receiving groove 214. Note that the terminals 261 need not necessarily be loaded in all the terminal receiving grooves 214, and the terminals 261 can be omitted as appropriate in accordance with the arrangement of the conductive wires of the flat cable 101.

  On the side portion 216 of the housing body 217, a slit-shaped auxiliary metal fitting recess 216a extending in the insertion / extraction direction of the flat cable 101 is formed, and an auxiliary auxiliary metal fitting 281 for securely attaching the connector 1 to the board is provided. It is inserted into the auxiliary metal fitting receiving recess 216 a and attached to the housing 211. The auxiliary mounting bracket 281 is preferably formed by punching or bending a metal plate, and the bottom surface of the lower end functions as a connection surface connected to the surface of the substrate. It is a member that is fixed to the surface of the substrate by fixing means such as soldering, and fixes the housing 211 to the substrate. As a result, the connector 201 is firmly attached to the board, and the connector 201 is prevented from being detached from the board.

  The actuator 221 includes an actuator body 222 that is a substantially square plate member, and a pressing portion 223 formed on the lower surface of the actuator body 222. The pressing portion 223 is a portion that presses the flat cable 101 inserted from the insertion port 233 downward, that is, toward the lower portion 212 when the actuator 221 is in the closed position. The lower surface of the pressing portion 223 when the actuator 221 is in the closed position is a cable pressing surface, and the upper surface of the flat cable 101 inserted from the insertion port 233, that is, the exposure of the conductive wire. It abuts against the surface opposite to the surface to be operated. The pressing portion 223 enables the flat cable 101 to be inserted and removed when the actuator 221 is in the open position.

  Further, a plurality of receiving grooves 224 for receiving the upper arm portions 263 of the terminals 261 are formed in the rear end side portion (the right end side in FIG. 9) of the pressing portion 223. The number and position of the receiving grooves 224 correspond to the terminal receiving grooves 214. In addition, the actuator 221 has a shaft portion 248 that extends in the width direction by crossing the inside of each receiving groove 224 and connecting the pressing portions 223 to each other. A portion of the shaft portion 248 located in the accommodation groove 224 engages with the upper arm portion 263 of the terminal 261.

  The terminals 261 are formed by punching a metal plate, and are arranged and loaded in a line in the width direction of the housing 211 (the left-right direction in FIGS. 8A and 8B). The terminal 261 is located at a rear end portion of the main body 266 extending in the vertical direction, and an actuator extending forward (leftward in FIG. 8C) from the upper end of the main body 266. An upper arm portion 263 as a holding arm portion, a tail portion 268 as a substrate connecting portion extending downward from the lower end of the main body portion 266, and a lower arm extending forward from the lower end of the main body portion 266 Part 265.

  The lower arm portion 265 is disposed to face the upper arm portion 263. A contact portion 265 a that contacts the conductive wire of the flat cable 101 is formed at the free end of the lower arm portion 265, that is, the distal end when the actuator 221 is in the closed position. The lower arm 265 functions as a cantilever-like spring member whose rear end is restrained by the main body 266 and whose front end is a free end.

  As shown in FIG. 9, a housing lower opening 219 b that is an opening penetrating the lower portion 212 in the thickness direction is formed at a portion corresponding to the tip of the lower arm portion 265 in the lower portion 212 of the housing body 217. . Therefore, the tip of the lower arm 265 can be displaced in the vertical direction without being restricted. Thereby, the contact portion 265a is pressed against the conductive wire of the flat cable 101 by the spring force exerted by the lower arm portion 265, so that the contact with the conductive wire is reliably maintained.

  A housing upper opening 219a is formed as a gap between the upper portion 215 of the housing body 217 and the actuator body portion 222 of the actuator 221 in the closed position. The housing upper opening 219a is located at a position substantially corresponding to the housing lower opening 219b with respect to the front-rear direction of the housing 211 (the left-right direction in FIG. 8C). Therefore, when the actuator 221 is in the closed position, in the terminal receiving groove 214 corresponding to each terminal 261, the upper and lower portions of the contact portion 265a are opened because the housing upper opening 219a and the housing lower opening 219b are positioned. It has become. That is, the housing 211 does not exist above and below the contact portion between the terminal 261 and the conductive wire of the flat cable 101 as the counterpart terminal.

  In the present embodiment, the seat 41 is affixed to the upper surface of the actuator body 222 of the actuator 221 included in the housing 211, and the portion that protrudes rearward from the upper surface of the actuator body 222 has a housing upper opening. The cover 219a is closed. Since the sheet 41 is a member that suppresses noise, it is desired that the sheet 41 be attached to a portion where noise is most likely to occur, that is, a portion close to a contact portion between the terminal 261 and the counterpart terminal. In consideration of the ease of the pasting operation, it is desirable to stick the sheet 41 to the outer surface of the housing 211. In addition, since the connector 201 is mounted on the surface of a board (not shown) and the flat cable 101 is inserted and fitted, it is possible to attach the sheet 41 to the mounting surface and the fitting surface of the housing 211. Impossible. As can be seen from FIG. 9, the contact portion 265a of the terminal 261 is in contact with the conductive wire of the flat cable 101 as the counterpart terminal at a position corresponding to the housing upper opening 219a. Therefore, in the present embodiment, the sheet 41 is attached to the upper surface of the actuator body 222 so as to cover the housing upper opening 219a.

  In the example shown in the figure, the sheet 41 is affixed to the upper surface of the actuator body 222 of the actuator 221, but is not necessarily the upper surface of the actuator body 222, for example, the housing body 217. A portion that is attached to the upper surface of the upper portion 215 and protrudes forward from the upper surface of the upper portion 215 may cover the housing upper opening 219a. That is, it is only necessary that the sheet 41 covers a portion corresponding to a position directly above the contact portion between the terminal 261 and the conductive wire of the flat cable 101 as the counterpart terminal. In other words, the sheet | seat 41 should just be affixed on the outer surface of the housing 211 so that at least the part corresponding to the directly upper part of the contact location of the terminal 261 and the other party terminal may be covered.

  Since the configuration of other points is the same as that of the first embodiment, description thereof is omitted.

  Thus, in the present embodiment, the connector 201 includes a housing 211 that fits with the flat cable 101, a terminal 261 that is held by the housing 211 and contacts a conductive wire as a counterpart terminal of the flat cable 101, The sheet 41 has a layer structure in which a soft magnetic layer 42 and a conductive dielectric layer 43 are laminated.

  Thereby, although it is a simple structure, a noise can be suppressed reliably and the influence on signal integrity can be suppressed. Moreover, the cost of the connector 201 can be reduced, durability can be improved, and reliability can also be improved.

  Next, a third embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st and 2nd embodiment, the description is abbreviate | omitted by providing the same code | symbol. Also, the description of the same operations and effects as those of the first and second embodiments is omitted.

  10 is a perspective view of a connector with a sheet according to the third embodiment of the present invention, FIG. 11 is a three-view diagram of the connector with a sheet according to the third embodiment of the present invention, and FIG. 12 is a third embodiment of the present invention. The figure explaining the fitting operation | work of the connector with a sheet | seat and the other party connector in this form, FIG. 13: is a figure which shows the state which the connector with a sheet | seat and the other party connector in the 3rd Embodiment of this invention fitted. 10A is a diagram illustrating a state after the sheet is pasted, FIG. 10B is a diagram illustrating a state before the sheet is pasted, and FIG. 11A is a top view. (b) is a front view, (c) is a side view, and in FIG. 12, (a) is a perspective view showing a mating connector, (b) is a perspective view showing a connector with a sheet, and (c) is a connector with a sheet. It is a perspective view which shows the state which the other party connector fitted, in FIG. 13, (a) is a top view, (b) is sectional drawing, and is CC sectional view taken on the line in (a).

  In the figure, reference numeral 301 denotes a connector as a connector with a sheet in the present embodiment, and specifically, a connector as one of the board-to-board connectors. The connector 301 is mounted on a surface of a board such as a circuit board (not shown) and is electrically connected to a counterpart connector 401 as a counterpart connection body which is the other of the board-to-board connectors mounted on the side of a counterpart board (not shown). Used to connect.

  The connector 301 is integrally formed with a housing 311 integrally formed of a dielectric material such as a synthetic resin and a conductive material such as metal, and is electrically connected to a counterpart terminal 461 of the counterpart connector 401. And a plurality of terminals 361.

  As shown in the drawing, the housing 311 has a substantially rectangular thick plate shape that is a substantially rectangular parallelepiped, and is the side on which the mating connector 401 is inserted, that is, the fitting side (upper side in FIG. 11B). Is formed with a substantially rectangular recess 312 surrounded by the periphery. A convex portion 313 as an island portion is formed integrally with the housing 311 in the concave portion 312, and side wall portions 315 extending in parallel with the convex portion 313 are provided on both sides of the convex portion 313. 311 is formed integrally. In this case, the convex portion 313 and the side wall portion 315 protrude upward from the bottom surface of the concave portion 312 and extend in the longitudinal direction of the housing 311. Thus, on both sides of the convex portion 313, a concave groove portion 312 a that is an elongated insertion concave portion extending in the longitudinal direction of the housing 311 is formed between the convex portion 313 and the side wall portion 315 as a part of the concave portion 312. The In the example shown in the figure, the convex portion 313 is singular, but may be plural, and the number may be any number.

  Here, concave groove-shaped terminal receiving cavities 314 are formed on both side surfaces of the convex portion 313, and the side wall portion 315 has a concave groove shape so as to straddle (or straddle) the upper surface and both side surfaces. A terminal accommodating cavity 314 is formed. The terminal accommodating cavity 314 formed on the convex portion 313 and the terminal accommodating cavity 314 formed on the side wall portion 315 are connected to each other on the bottom surface of the concave groove portion 312a and integrated with each other.

  For example, 20 terminal receiving cavities 314 are formed on both the left and right sides with a pitch of about 0.4 [mm], and one terminal 361 is loaded in each terminal receiving cavity 314. Note that the terminals 361 are not necessarily loaded in all the terminal accommodating cavities 314, and the terminals 361 can be omitted as appropriate according to the arrangement of the counterpart terminals 461.

  The terminal 361 is a member integrally formed by punching and bending a conductive metal plate, and includes a main body 366 and a tail 368 connected to the lower end of the main body 366. And an upper arm portion 363 connected to the upper end of the main body portion 366 and a lower arm portion 365 connected to the upper arm portion 363.

  The main body 366 extends in the vertical direction, that is, the thickness direction of the housing 311, and is a portion that is fitted and held in a terminal receiving cavity 314 formed in the side wall 315. The tail portion 368 is bent and connected to the main body portion 366 and is connected to a connection pad connected to a conductive trace on the substrate by soldering or the like. Further, the lower arm portion 365 is a portion that is bent downward toward the inner end of the upper arm portion 363 and has a U-shaped side surface shape. A first contact portion 365 a 1 is formed at the free end of the lower arm portion 365, that is, at the tip, as a contact portion that comes into contact with the counterpart terminal 461 when fitted to the counterpart connector 401. In addition, a second contact portion 365a2 as a contact portion that comes into contact with the counterpart terminal 461 when fitted to the counterpart connector 401 is provided at the base end of the lower arm portion 365, that is, the end on the side connected to the upper arm portion 363. Is formed to face the first contact portion 365a1.

  The terminal 361 is a member formed integrally by processing a metal plate, and thus has a certain degree of elasticity. As apparent from the shape of the lower arm portion 365, the distance between the first contact portion 365a1 and the second contact portion 365a2 facing each other can be elastically changed. That is, when the counterpart terminal 461 of the counterpart connector 401 is inserted between the first contact portion 365a1 and the second contact portion 365a2, the distance between the first contact portion 365a1 and the second contact portion 365a2 is elastic. Elongate.

  In addition, projecting end portions 321 as fitting guide portions are disposed at both ends in the longitudinal direction of the housing 311. Each protruding end 321 is formed with a protruding end recess 322 as a part of the recess 312. The projecting end recess 322 is a substantially rectangular recess and is connected to both ends in the longitudinal direction of each recess groove 312a. The projecting end recess 322 functions as a guide recess into which the mating projecting end 422 included in the mating connector 401 is inserted in a state where the connector 301 and the mating connector 401 are fitted.

  In the present embodiment, the sheet 41 is affixed to the outer side surface of the side wall portion 315 and the protruding end portion 321 of the housing 311, and covers the side surface of the housing 311 over the entire circumference. That is, it is stuck so as to cover almost the entire side surface except for the fitting surface (upper surface in FIG. 11B) and the mounting surface (lower surface in FIG. 11B) of the connector 301. 10A and 10B, the terminal housing cavity 314 formed on the outer side surface of the side wall portion 315 and the body portion of the terminal 361 housed in the terminal housing cavity 314 are clear. 366 is covered with a sheet 41.

  The mating connector 401 is a plurality of mating housings 411 integrally formed of a dielectric material such as synthetic resin and a conductive material such as metal, and is electrically connected to the terminals 361 of the connector 301. The other party terminal 461.

  As shown in FIG. 12, the counterpart housing 411 has a substantially rectangular thick plate shape that is a substantially rectangular parallelepiped, and is the side fitted into the connector 301, that is, the fitting side (the lower side in FIG. 13B). Side), a long and narrow groove 413 extending in the longitudinal direction of the mating housing 411, and a mating convex as an elongated insertion convex portion that defines the outside of the groove 413 and extends in the longitudinal direction of the mating housing 411. The part 412 is integrally formed. The counterpart convex portion 412 is formed along both sides of the concave groove portion 413 and along both sides of the counterpart housing 411. Each counterpart convex portion 412 is provided with a counterpart terminal 461. The concave groove 413 is closed on the side mounted on the counterpart substrate, that is, on the mounting side (the upper side in FIG. 13B). In the example shown in the figure, there are two opposing convex portions 412, but it may be singular or any number.

  The counterpart convex portion 412 is formed with a terminal receiving cavity 414 so as to straddle the side surfaces and the upper surface of both sides thereof, and the counterpart terminal 461 is received in the terminal receiving cavity 414. For example, 20 terminal receiving cavities 414 are formed on the left and right sides of the concave groove portion 413 at a pitch of about 0.4 mm, and one terminal 461 is loaded in each terminal receiving cavity 414. It is like that. Note that the counterpart terminals 461 are not necessarily loaded in all the terminal accommodating cavities 414, and the counterpart terminals 461 can be omitted as appropriate according to the arrangement of the terminals 361.

  The counterpart terminal 461 is a member formed integrally by punching or bending a conductive metal plate, and has a main body 466 that also functions as a second contact portion, and the main body 466 A tail portion 468 connected to the lower end and an arm portion 465 connected to the upper end of the main body portion 466 are provided.

  The main body 466 extends in the vertical direction, that is, in the thickness direction of the counterpart housing 411, is fitted and held in the terminal accommodating cavity 414, and contacts the second contact portion 365 a 2 of the terminal 361. Part. The tail portion 468 is bent and connected to the main body portion 466, and is connected to a connection pad connected to a conductive trace on the counterpart substrate by soldering or the like. Further, the arm portion 465 is a portion that is bent and connected to the main body portion 466 and has an L-shaped side surface shape. Then, the first contact portion 365a1 of the terminal 361 contacts the arm portion 465.

  Further, opposite side protruding end portions 422 as counterpart mating guide portions are disposed at both ends in the longitudinal direction of the counterpart housing 411. The counterpart projecting end 422 is a thick member that extends in the short direction of the counterpart housing 411 and has both ends connected to both ends in the longitudinal direction of each counterpart convex portion 412, and its upper surface is a substantially rectangular flat surface. is there. The counterpart protruding end 422 is a portion that is inserted into the protruding end recess 322 of the protruding end 321 included in the connector 301 in a state where the connector 301 and the counterpart connector 401 are fitted.

  Note that the sheet 41 is not attached to the counterpart housing 411.

  When the connector 301 and the mating connector 401 are mated, the mating surface of the connector 301 and the mating surface of the mating connector 401 are opposed to each other as shown in FIGS. In this state, the positions of the left and right mating convex portions 412 of the mating connector 401 coincide with the positions of the left and right concave groove portions 312 a of the connector 301, and the positions of the mating projecting end portions 422 of the mating connector 401 are projected from the connector 301. Positioning is performed so as to match each position of the end recess 322. In this case, the connector 301 and the counterpart connector 401 are generally mounted on the surface of the board and the counterpart board in advance, but the illustration of the board and the counterpart board is omitted here for convenience of explanation. .

  In this state, when the mating connector 401 is moved relatively in the direction approaching the connector 301, that is, in the fitting direction, the mating convex portion 412 and the mating protruding end 422 of the mating connector 401 are in the concave groove portion 312a of the connector 301. And inserted into the protruding end recess 322. Then, the counterpart terminal 461 is inserted between the first contact portion 365a1 and the second contact portion 365a2 of each terminal 361, and the first contact portion 365a1 of the terminal 361 and the arm portion 465 of the counterpart terminal 461 come into contact with each other. The second contact portion 365a2 of 361 contacts the main body portion 466 of the counterpart terminal 461.

  As a result, the terminal 361 and the counterpart terminal 461 become conductive. As a result, the conductive trace connected to the connection pad on the substrate to which the tail portion 368 of the terminal 361 is connected, and the conductive trace connected to the connection pad on the counterpart substrate to which the tail portion 468 of the counterpart terminal 461 is connected, Is conducted. In this case, since the distance between the first contact portion 365a1 and the second contact portion 365a2 of the terminal 361 is elastically expanded by inserting the counterpart terminal 461, the spring force generated as the reaction force causes The first contact portion 365a1 is pressed by the arm portion 465, and the second contact portion 365a2 is pressed by the main body portion 466. Therefore, the conduction state between the terminal 361 and the counterpart terminal 461 is reliably maintained.

  As described above, the sheet 41 is pasted so as to cover almost the entire side surface except for the fitting surface and the mounting surface of the connector 301. Since the sheet 41 is a member that suppresses noise, it is desirable that the sheet 41 be attached to a portion where noise is most likely to occur, that is, a portion closest to a contact portion between the terminal 361 and the counterpart terminal 461. In consideration of the ease of the pasting operation, it is desirable to stick the sheet 41 to the outer surface of the housing 311.

  When the connector 301 and the mating connector 401 are fitted, the mating housing 411 of the mating connector 401 enters and is accommodated in the recess 312 of the housing 311, so that the housing 311 and the mating housing 411 are fitted. It is substantially impossible to attach the sheet 41 to the mating surface and the side surface of the counterpart housing 411. Further, since the connector 301 and the counterpart connector 401 are mounted on the surfaces of the board and the counterpart board (not shown), it is substantially impossible to attach the sheet 41 to the mounting surfaces of the housing 311 and the counterpart housing 411. .

  Therefore, in the present embodiment, the sheet 41 is affixed to the outer side surface of the side wall portion 315 of the housing 311.

  In the example shown in the figure, the sheet 41 is pasted so as to cover substantially the entire outer side surface of the side wall portion 315, but the side wall portion 315 is not necessarily covered over the entire thickness direction of the side wall portion 315. It is not necessary to cover the outer side surface, and it is sufficient if the first contact portion 365a1 and the second contact portion 365a2 of the terminal 361 cover a portion corresponding to the location where the counterpart terminal 461 contacts. That is, it is only necessary to cover a portion corresponding to the position directly above the contact portion between the terminal 361 and the counterpart terminal 461 when viewed from the center in the width direction of the connector 301. In the example shown in the figure, the sheet 41 is also affixed to the outer side surface of the protruding end 321 of the housing 311, but is not necessarily required to be affixed to the outer side surface of the protruding end 321. . In other words, the sheet 41 only needs to be affixed to the outer surface of the housing 311 so as to cover at least a portion corresponding to a position directly above the contact portion between the terminal 361 and the counterpart terminal 461.

  Since the configuration of other points is the same as that of the first and second embodiments, the description thereof is omitted.

  Thus, in the present embodiment, the connector 301 is attached to the housing 311, the housing 311 that fits into the counterpart connector 401, the terminal 361 that is held by the housing 311 and contacts the counterpart terminal 461 of the counterpart connector 401. The sheet 41 has a layer structure in which a soft magnetic layer 42 and a conductive dielectric layer 43 are laminated.

  Thereby, although it is a simple structure, a noise can be suppressed reliably and the influence on signal integrity can be suppressed. Moreover, the cost of the connector 301 can be reduced, durability can be improved, and reliability can also be improved.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

  The present invention can be applied to a connector with a sheet.

1, 201, 301 Connector 11, 211, 311, 811 Housing 11a, 211a Front surface 11b, 211b Rear surface 12, 212 Lower portion 14, 214 Terminal receiving groove 15, 215 Upper portion 16, 216 Side portion 16a Auxiliary metal fitting fixing recess 33, 233 Insertion Mouth 41 Sheet 42 Soft magnetic layer 43 Conductive dielectric layer 44 Adhesive layer 45 Release paper 61, 261, 361, 861 Terminal 65, 263, 363 Upper arm portion 65a, 265a Contact portion 66, 266, 366, 466, 815 Main body portion 68, 268, 368, 468, 862 Tail portion 71, 281 Auxiliary fitting for mounting 80 Inspection target portion 81 Signal generator 82 EMI tester 83 Spectrum analyzer 84 Terminal device 85 Probe 91 Substrate 92 Conductive trace 101 Flat cable 216a Auxiliary fitting receiving recess 217 Housing body 19a Housing upper opening 219b Housing lower opening 221 Actuator 222 Actuator body part 223 Pressing part 224 Housing groove 248 Shaft part 265, 365 Lower arm part 312 Recess 312a, 413 Recessed groove part 313 Projecting part 314, 414 Terminal receiving cavity 315 Side wall part 321 Projection End 322 Protruding end recess 365a1 First contact portion 365a2 Second contact portion 401 Mating connector 411 Mating housing 412 Mating convex portion 422 Mating protruding end 461 Mating terminal 465 Arm 814 Sleeve 816 Locking groove 871 Shield plate 872 Pressing piece 873 Contact piece 875 Shield absorbing elastic plate 891 Circuit board 892 Through hole 895 Metal chassis

Claims (5)

(A) a housing that fits into the mating connector;
(B) a terminal held by the housing and in contact with a mating terminal of the mating connector;
(C) A connector with a sheet having a sheet attached to the housing,
(D) The sheet is affixed to the outer surface of the housing so as to cover at least a portion corresponding to a position directly above the contact point between the terminal and the counterpart terminal, and the sheet includes a soft magnetic layer and a conductive dielectric layer. The sheet is an electromagnetic interference suppression sheet in which a soft dielectric layer made of a soft magnetic powder and a resin is laminated on a conductive dielectric layer made of a conductive filler and a resin. The electrical resistance of the dielectric layer is 0.5 to 20 Ωcm, the real part of the complex relative permeability at 100 MHz of the soft magnetic layer is 20 to 45, and the reflection (S11) of the electromagnetic interference suppression sheet is −10 dB or less,
(E) The connector with a sheet, wherein the housing is made of a dielectric material, and the dielectric constant of the conductive dielectric layer is higher than the dielectric constant of the housing. The connector with a sheet according to claim 1 , wherein the sheet is affixed to an outer surface of the housing, excluding a fitting surface and a mounting surface. The sheet, there are conductive dielectric layer adjacent to the housing, according to any one of claims 1 to 2, adjacent to the conductive dielectric layer is laminated to the soft magnetic layer is present Connector with sheet. The connector with a sheet according to any one of claims 1 to 3 , wherein the mating connector is a cable or a connector. The sheet according to any one of claims 1 to 4 , wherein the soft magnetic powder used for the soft magnetic layer is made of a flat soft magnetic metal powder, and the conductive filler used for the conductive dielectric layer is made of conductive carbon fiber. With connector.

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