Abstract: An aluminum electric wire (10) has a metallic core wire (11) coated with an insulation coating (13). A female terminal fitting (20) made of metal different from the core wire (11) has a wire barrel (25) to be connected to the aluminum electric wire (10). A solder seal (30) is formed of solder having a main component with an ionizing tendency close to that of the terminal fitting. The wire barrel (25) is crimped to the core wire (11) exposed by peeling off the insulation coating (13) of the aluminum electric wire (10) and partially sealed with the solder. A seal connection portion (14) connects the insulation coating (13), the exposed core wire (11) and the solder seal (30) to each other in a condition where the coating (13) and the solder seal (30) are sealed off from each other.

Abstract: The invention relates to an electrical contact device and, in particular, a crimp contact device for a cable. The crimp contact device includes a cable conductor connection region and a cable insulation crimp region. The cable insulation crimp region includes a fixing device disposed along an inner surface thereof.

Abstract: A crimped terminal is provided and includes a conductor, a crimped element, and a plurality of conductive particles: The conductor includes aluminium, and the crimped element is disposed around the conductor. The plurality of conductive particles include a copper alloy and are arranged between the conductor and the crimped element.

Abstract: Concave serrations are provided in an inner surface of a conductor crimping portion of a crimp terminal. A number of circular concave portions are provided in the inner surface of the conductor crimping portion as the concave serrations so as to be scattered in a state of being spaced aside from one another. A diameter of an inner bottom surface of each circular concave portion is set within a range of 0.15 (an error range is ±0.04) mm to 0.8 (the error range is ±0.04) mm. A serration angle between an extension surface of the inner bottom surface and an inner side surface of each circular concave portion is set within a range of 60 to 90 degrees. A shortest distance of a flat surface portion between peripheries of mutually adjacent circular concave portions is set to be 0.17 (the error range is ±0.09) mm.

Abstract: The invention relates to a method for improving the transition resistance in an electrical connection, in particular a pressure connection, between two contact elements. With repeated mechanical or thermal loads, such connections, in particular connections having a small cross-section or comprising soft material, have a transition resistance which increases over time. According to the invention, the transition resistance is improved by there being applied to at least one contact face of a contact element a chemically reducing substance which activates the contact face and consequently increases the conductivity and the cold welding density.

Abstract: A device connectable to an electric power line conductor including an electrically conductive insulated wire wound at least twice. A first end of the wire is configured to be connected to a first power line conductor and a second end of the wire is configured to be connected to a second power line conductor. A housing is mountable to the wire and includes an iron core power supply transformer configured to surround the wire to power a power supply module.

Abstract: Provided is a terminal, including: a ground metal part made of a first metallic material; an intermediate layer made of a second metallic material having a smaller value of standard electrode potential than that of the first metallic material, and plated thin on at least a part of a surface of the ground metal part; and a surface layer made of a third metallic material having a smaller value of standard electrode potential than that of the second metallic material, and plated thin on at least a part of a surface of the intermediate layer.

Abstract: A crimp contact, a gas sensor including the crimp contact for outputting a signal from a sensing portion of a sensor element to an external device, and a method for manufacturing the crimp contact. The crimp contact includes a barrel portion crimped so as to fix a plurality of lead core wires (16) of an electrical lead connected to the external device. A hold portion constituting the barrel portion is formed such that the lead core wires 16 of the electrical lead are disposed in an U-shaped hold portion 77 so as to be crimped between an anvil 120 and a crimper 121. An outer surface of the U-shaped hold portion 77 has a plating layer 85 thereon to thereby constantly secure slidability between a sliding face of the crimper 121 and the outer surface of the U-shaped hold portion 77.

Abstract: In one aspect, a method for securing a signal conductor to a contact is provided. The method includes obtaining a contact having a first end and a second end, wherein the second end comprises a crimp area having a wall that defines a cavity and a plurality of cold flow holes are formed in the wall and surround at least a portion of the cavity; inserting an end of the signal conductor into the cavity; and after inserting the end of the signal conductor into the cavity, crimping the crimp area so that the signal conductor cold flows into at least one of the cold flow holes.

Abstract: An electric connection terminal includes a contact section for electrical connection to an opposite terminal and a crimping section with the contact section being crimped to cover the conductor and cover of a covered electric wire. The crimping section includes a conductor crimping part to be tightly attached to and crimped around the conductor, a cover crimping part to be tightly attached to and crimped around the cover of the covered electric wire, and a boundary crimping part to be tightly attached to and crimped around the vicinity of a boundary between the cover and conductor. A compression ratio of the boundary crimping part in a state of crimped around the covered electric wire is set to be higher than that of the cover crimping part.

Abstract: In a connector terminal connected to an electric wire in which a conductor is covered with an outer cover, the terminal includes a barrel portion that is exposed from the outer cover and is to be crimped to the conductor coated with a covering, and an electrical connection portion electrically connected to a mating terminal, wherein a trench or a projection that is provided along a direction perpendicular to an axis of the electric wire are formed in an inner surface of the barrel portion, and a depth of the trench or a projecting dimension of the projection is made smaller than a covering thickness of the covering.

Abstract: Herein disclosed is a technique that suppresses the decrease of a contact pressure due to creep in a crimping part of a single core electric wire and a terminal. A single core electric wire 10 includes a hollow single core wire 20 and an electric wire coat 40. The hollow single core wire 20 includes a hollow part 30. The hollow part 30 is formed in a circular shape in section in the central part of a section of the hollow single core wire 20 and is formed in an extending direction, that is, a direction of a central axis of the hollow single core wire 20. Namely, the hollow single core wire 20 has a tubular form.

Abstract: Disclosed is a method of assembling a connecting device (3) on a stripped end section (6) of an electric cable (4), the method including a first step of crimping a first zone (40) of a tubular portion (13) of the device with a first portion (43) of the section that is configured so that the first portion has a first predetermined degree of compression; a second step of crimping a second zone (41) of the tubular portion with a second portion (44) of the section that is configured so that the second portion has a second predetermined degree of compression lower than the first degree; a step of punching a third zone (42) of the tubular portion with a third portion (56) of the section which is configured so that the third portion has a third predetermined degree of compression higher than the first degree.

Abstract: The invention provides a bus bar, which includes an elongated base plate, a plurality of tuning fork-shaped terminal portions and a plurality of plate-shaped terminal portions both extending from one lateral end of the elongated base plate, a terminal-protecting portions being perpendicular to the elongated base plate and extending from both longitudinal ends of the elongated base plate, and an electric wire-crimping portion extending from the other lateral end of the elongated base plate.

Abstract: A conductor connecting structure comprises a flat circuit body having an insulator and a conductor, and a conductive terminal metal fitting having a conductor connecting part including a first conductor holding part and a second conductor holding part. The first conductor holding part has a first plate-like part formed into a plate-like shape, and a projecting part which projects from a surface of the first plate-like part that is faced to the conductor. The second conductor holding part has a second plate-like part formed into a plate-like shape, and a through hole arranged so as to correspond to a position of the projecting part and penetrating the second plate-like part. When the conductor is sandwiched by the first conductor holding part and the second conductor holding part, the conductor is deformed so as to be pushed into the through hole.

Abstract: The embodiments of the present invention provide a plug and a power connector. The plug is applied in a power connector connected between a power supply device and a radio frequency module. The plug includes a jack and a crimping component set at a tail end of the jack, and the crimping component is configured to connect a power cable introduced from the power supply device to the jack in a manner of fixing. A power connector that includes the plug is further provided. By using the technical solutions according to the embodiments, easy on-site installation of the power connector that includes the plug during use may be ensured.

Abstract: An electrical terminal is provided and includes a first member and a second member. The first member includes a pair of connecting face portions, a coupling portion, and a plurality of serrations. The pair of connecting face portions face each other in a substantially V shape such that a gap between inner faces of the pair of connecting face portions gradually becomes smaller from a wider-gap side to a narrower-gap side. The coupling portion connects the pair of connecting face portions at ends of the narrower-gap side of the inner faces. The plurality of serrations are disposed on the pair of inner faces and extend along intersecting directions. The second member has a substantially U shape that mates with the pair of connecting face portions and can displace outer side faces of the pair of connecting face portions inward to urge the inner faces closer to each other.

Abstract: A connector includes a first and a second terminals and a fixing member that fixes the first and the second terminals by covering periphery thereof in a state where the first and the second terminals are aligned in the direction extending into the rod-shape and overlap with each other in a direction perpendicular to the direction in which the first and the second terminals are aligned, wherein a cut-out portion of the first terminal faces a peripheral portion or a cut-out portion of the second terminal in the overlapping state, and at least parts of outer edges of a facing part have a same shape on the section along the direction perpendicular to the direction extending into the rod-shape.

Abstract: A mounting component has a conductive member. The conductive member includes a press-fitting unit that is linearly extended and press-fitted in a housing, two electrode portions that are arrayed in a direction in which the press-fitting unit is press-fitted and soldered onto pads, and a connection portion that is extended in parallel with the press-fitting unit to connect the two electrode portions.

Abstract: Has an object of providing a crimp terminal, a connection structural body, and a method for producing the crimp terminal, which has a conducting function with certainty, with no galvanic corrosion occurring due to an electric wire and the terminal formed of different metal materials. A crimp terminal 1 includes a box section, and a pressure-bonding section including a wire barrel section and an insulation barrel section, which are provided in this order. The crimp terminal is formed of a metal plate which is formed of a copper alloy having a higher potential than aluminum used to form core wires of an insulated wire which is to be pressure-bonded by the pressure-bonding section. The crimp terminal 1 includes, in at least a part thereof, a resin cover section for covering a surface of the metal plate with a resin.

Abstract: A light emitting diode lamp, includes a pair of contacts for the electrical connection of the light emitting diode, wherein the pair of contacts includes two crimp contacts separated electrically from one another, each crimp contact including a conducting input including a conducting crimping skirt and a clinching zone intended to receive by clinching an electrical contact of the light emitting diode.

Abstract: A crimped electric wire with a terminal, includes: an electric wire having a core wire made of aluminum or aluminum alloy; and a terminal fitting having an electric wire crimping section for crimping the core wire partly exposed from the electric wire, wherein: a value obtained by dividing the height of the electric wire crimping section by the width of the electric wire crimping section after the crimping of the electric wire crimping section is set to 0.5 or more and 0.6 or less; and the value obtained by dividing the gross cross-sectional area of the core wire after the crimping of the electric wire crimping section by the gross cross-sectional area of the core wire before the crimping of the electric wire crimping section is set to 55% or more and 65% or less.

Abstract: In a structure of a crimping connection part of an aluminum electric wire and a metal terminal, the aluminum electric wire includes a core wire and an insulating sheath covering the core wire, an exposed core wire in which the core wire is exposed from the insulating sheath at an end portion of the aluminum electric wire is crimped by a core wire crimping part of the metal terminal to form the crimping connection part, and the exposed core wire and the metal terminal of the crimping connection part are covered by a vapor deposited film comprised of an electrically conductive powder.

Abstract: A connection terminal includes a box-shaped terminal body, a male contact piece protruding from a first side wall of the terminal body, a female contact portion arranged inside of the terminal body, a slit formed in a second side wall and at least one of a front wall closing up a front opening of the terminal body and a rear wall close up a rear opening of the terminal body.

Abstract: A crimping terminal includes a conductor crimping portion which is connected to an electric cable so as to crimp the electric cable. The conductor crimping portion includes a bottom plate on which a conductor is placed and a pair of conductor crimping tabs which is provided on both sides of the bottom plate. The conductor crimping portion includes serrations that are formed at least a part of the inner surface thereof and retains the conductor of the electric cable inside the conductor crimping portion and at least one bead that protrudes from the inner surface.

Abstract: A conductive metal terminal includes a conductor holding part that holds a conductor of a electrical cable at a distal end side of the conductive metal terminal and a sheath holding part that holds a sheath at a proximal end side of the conductive metal terminal. The conductor holding part includes a bottom plate on which the conductor of the aluminum electrical cable is placed and a pair of conductor crimping pieces. The sheath holding part includes a bottom plate adjacent to the bottom plate of the conductor holding part and a pair of sheath crimping pieces. The conductor holding part further includes an indent formed in a semi-cylindrical shape and extending from one of the conductor holding part to the other of the conductor holding part. The conductor holding part further includes circular-shaped serrations which are closer to the distal end side than the indent.

Abstract: A crimping apparatus includes an anvil for supporting a metal terminal including a base plate portion for mounting an electric wire thereon and a pair of crimping piece portions extending upwardly respectively from opposite side edges of the base plate portion and a crimper which includes a groove portion being opposed to a supporting portion of the anvil. An inner surface of the groove portion of the anvil and a terminal support face of the supporting portion of the crimper cooperate to press the crimping piece portions for crimping the crimping piece portions to the electric wire mounted on the metal terminal. A width of the groove portion of the crimper is not more than 1.0 mm. The terminal support surface of the anvil is formed into a concavely curved surface in which a depth of the concavely curved surface is not smaller than 0.06 mm and is not larger than 0.17 mm in a cross-section of the anvil perpendicular to an axis direction of the electric wire.

Abstract: A terminal fitting (10) includes a wire barrel (12) to be crimped and connected to a core (61) at an end portion of a wire (60). An insulation barrel (13) is located behind the wire barrel (12) and is to be crimped and connected to an insulation coating (62) at the end portion of the wire (60). The inner surface of the insulation barrel (13) is formed with a close-contact portion (18) to be held in close contact with the insulation coating (62) and a recessed groove (19) spaced from the insulation coating (62) and extending over the entire circumference. The recessed groove (19) has an opening (21) that is open at the front end of the insulation barrel (13) and a waterproof material (40) flows into the recessed groove (19) through the opening (21). The waterproof material (40) adheres to the outer surface of the core (61).

Abstract: A connection structure has an electric wire and a terminal. The terminal includes a mating terminal connection portion to be connected to a mating terminal and a crimping portion which crimps to a conductor of an electric wire. The electric wire is connected to the terminal by the crimping portion. The connection structure includes an intermediate portion that is provided between the mating terminal connection portion and the crimping portion and has a housing portion which houses an end portion of the conductor, an intermediate portion sealing member that is fitted in the housing portion, and a hollow covering member that extends in an extending direction of the electric wire and covers a portion from the intermediate portion to an insulating covering region.

Abstract: Provide is a connector which can improve production efficiency and retention strength of a lance of a terminal receiving portion on a terminal fitting. A terminal fitting includes an electric wire connection portion, an electrical contact portion connected to a mating terminal fitting and a tube portion provided between the electric wire connection portion and the electrical contact portion, and a housing includes a terminal receiving portion. The housing has a lance having one end continued to an inner face of the terminal receiving portion and the other end being a free end and extending toward the tube portion. The tube portion includes an opening portion. An engagement portion engaging with the free end is provided to an edge of the opening portion adjacent to the electrical contact portion so as to project from the edge of the opening portion toward an inner side of the tube portion.

Abstract: A method of waterproofing a crimping part of a crimp terminal where a wire is crimped includes a step of forming a waterproof structure. The waterproofing structure seals a crimping region containing the crimping part with an adhesive tape. The adhesive tape has waterproofing performance and has a thickness no more than a predetermined value.

Abstract: A metal part for an electric connecting device for connecting at least one stripped conductor end has a base limb, a contact limb that is substantially perpendicular relative to said base limb, and at least one lateral wall. The contact limb together with a clamping limb of a clamping spring forms a spring clamp terminal for an electric conductor to be connected. The metal part requires only a small amount of material in that the contact limb is bent away from the base limb, and the lateral wall is bent away from the contact limb, wherein the bending edge between the contact limb and the base limb runs perpendicular relative to the longitudinal extension of the contact limb and the base limb, while the bending edge between the contact limb and the lateral wall runs parallel relative to the longitudinal extension of the contact limb.

Abstract: There is provided a terminal of a connector which is surface-mounted on a substrate. A pair of first hanging-down parts extend from both sides of a terminal main body toward the substrate and are connected to a conductor pattern of the substrate. A second hanging-down part hangs down from one end of the terminal main body toward the substrate. The second hanging-down part has a pair of pressing plate portions which are bent toward the first hanging-down parts and is arranged to face each other with overlapping and contacting the first hanging-down parts.

Abstract: A battery pack includes a plurality of battery cells each having positive and negative cell terminals and a carrier mounted over and spanning across the plurality of battery cells. The carrier has trays with openings therethrough exposing the positive and negative cell terminals. A plurality of buss bars are received in corresponding trays. The buss bars each have a positive plate laser welded to the positive cell terminal of a corresponding battery cell through the corresponding opening and a negative plate laser welded to the negative cell terminal of a different battery cell through the corresponding opening. The buss bars may be bimetal buss bars.

Abstract: A conductive terminal includes a connecting portion in which a plurality of wires each having a rectangular cross section are to be arranged in parallel and to which the wires are to be electrically connected. The connecting portion has a structure to cover the wires. The connecting portion includes a position regulation member to regulate positions of the wires in an arrangement direction in which the wires are arranged. The position regulation member is provided to face at least one side surface of a wire located at an end of the wires in the arrangement direction.

Abstract: A crimp terminal (10) has a connecting portion (12) that is conductively connected to an electrical connection target, a crimp portion (14) that has a core crimping portion (22) that is fixed by crimping to a core (38) of a coated wire (32), and a link (16) that extends between the connecting portion (12) and the crimp portion (14), a positioning protrusion (30) is formed by a pair of slits (26) penetrating through the link (16) and extending in a direction along which the link (16) so as to be separated from each other in a width direction orthogonal to the extension direction. An intermediate region (28) sandwiched between the slits (26) in the width direction is deformed to protrude on a side on which the core crimping portion (22) protrudes.

Abstract: A connector having a spring inserted internally in a compression or crimp connector, or in a bolted compression connector, in contact with the electrical conductors to be connected electrically wherein the spring is capable of being mechanically deformed during compression of the connector and wherein the spring is capable of maintaining its elastic resilience and elastic springback properties to generate and maintain the required compression force on the conductor. The spring may be a metal mechanical spring or formed of a resiliently flexible material, particularly a polymeric material.

Abstract: To provide an electric wire with a crimp terminal which can improve a connection stability between a crimp terminal and the electric wire without making a fixing work of the crimp terminal troublesome. In an electric wire with a crimp terminal in which an outer peripheral surface of a conductor portion into which a plurality of metal element wires is bundled together is covered with an insulating sheath portion into an electric wire, and the conductor portion of a terminal portion of the electric wire is exposed, and a conductor crimping portion of the crimp terminal is crimped onto the exposed conductor portion, the terminal surfaces of the plurality of metal element wires are cut in alignments so that the metal element lines extend more as the metal element lines are farther from one side portion side of the exposed conductor portion in a radial direction.

Abstract: An electric terminal 1 comprising a terminal body 2 and a box-shaped hood 3 enclosing at least partially the terminal body 2, said hood 3 being bent from a sheet-metal part into the box-shaped design wherein the sheet-metal part has a first connecting end 20 and a second connecting end 21 both being bent towards each other, wherein said connecting ends 20, 21 of the sheet-metal part are form-fittingly connected to each other.

Abstract: The present invention related to a method for mechanically and electrically connecting an electric wire to a terminal element and to a terminal assembly comprising a terminal element and at least one electric wire that is mechanically and electrically connected to the terminal element. For improving such method and terminal assembly, the method comprises the steps of arranging a connecting portion of the electric wire substantially parallel to the an entrance surface of the contact opening; and connecting a joining section of the connecting portion with the contact opening by plastically deforming a lateral cut of the joining section.

Abstract: The invention relates to a crimping sleeve comprising a base part and at least two deformable crimping blades for producing a crimped connection to a cable, wherein the crimping blades each comprise a first region connected to the base part, a second region, and a middle region disposed between the first and the second regions, and wherein the base part comprises a greater thickness than the middle region of the crimping blades, the first region tapers down from the base part toward the middle region at least on a first side and the second region further tapers down from the middle region, starting at least on a second side opposite the first side, said sleeve thereby being equally suitable for cables having different cross sections for producing a reliable connection between the cables and crimping sleeve. The invention further relates to a connecting element having such a crimping sleeve.

Abstract: Provided is a crimp terminal designed to be crimped onto an end portion of an electric wire to form a terminal-equipped electric wire, achieving both of ensuring mechanical strength of the terminal-equipped electric wire and reducing a contact resistance between the electric wire and the crimp terminal. The crimp terminal comprises an electric contact section and an electric-wire crimp section to be crimped onto a conductor in the end portion of the electric wire, the crimp terminal being formed of a metal plate which has a copper-containing plate body and a tin-plating layer covering a surface of the plate body. In the crimp terminal, the tin-plating layer has a smaller thickness in a crimp surface region where the electric-wire crimp section is to make contact with the end portion of the electric wire is less than that in an electrical contact surface region where the electric contact section is to make contact with a counterpart terminal.

Abstract: There is provided a cable fixing member, comprising: an intermediate member crimped and tightened to a cable; a pair of bracket members for clamping and grasping one or a plurality of cables with the intermediate member tightened thereto, through the intermediate member; and one or a plurality of grooves formed on facing surfaces of the pair of bracket members by which the cable is clamped, for clamping the cable through the intermediate member, wherein an inner surface shape of the groove is formed to mesh with an outer surface shape of the intermediate member which is crimped and tightened to the cable.

Abstract: A conductor crimp portion (11) includes, in an inner surface (11R) of the conductor crimp portion (11), circular recesses (20) as serrations of the conductor crimp portion (11) scattered to be spaced from each other. Each of the recesses (20) before crimping has an elliptical shape (oval shape) having a minor axis oriented in a front-rear direction and a major axis oriented in a direction orthogonal to the front-rear direction, to take on a shape close to a perfect circle after crimping.

Abstract: A conductor crimp portion (11) before being crimped to a conductor of an electric wire includes, in an inner surface (11R) of the conductor crimp portion (11), circular recesses (20) as serrations of the conductor crimp portion (11) scattered to be spaced from each other. Each of the recesses (20) is formed through a press machining of the conductor crimp portion (11) by using a metal mold (70) with a protruded portion (72) formed, by a discharge machining, in a position corresponding to each of the recesses (20) or by using a metal mold with a protruded portion (85) formed, by press fitting a pin (83) into a press fit hole (82) formed in a block (81), in a position corresponding to each of the recesses (20).

Abstract: A crimp terminal (10) includes a conductor crimp portion (12) having a cross section formed into a U-shape by a bottom plate (13) and a pair of conductor crimping pieces (14, 14) provided to extend on both sides of the bottom plate (13) and crimped to wrap a conductor (Wa) of an electric wire (W) disposed on an inner surface (13a) of the bottom plate (13). The conductor crimp portion (12) is crimped and connected to the conductor (Wa) and includes serrations (16) at respective lattice points of a lattice (21, 22, 23) assumed in an inner surface (13a, 14a) of the conductor crimp portion (12) and obliquely crossing in a longitudinal direction of the conductor (Wa). The serrations (16) are consisted of cylindrical recesses having the same shape.

Abstract: In a crimp terminal (1) with a conductor crimp portion (11) having recessed serrations in the inner surface (11R), circular recesses (20) as serrations are provided in an inner surface (11R) of the conductor crimp portion (11) to be scattered so as to be spaced from each other before the conductor crimp portion (11) is crimped to a conductor (Wa) of an electric wire (W). A strip-shaped serration non-forming region (22) is provided in an intermediate portion in a front-back direction of the conductor crimp portion (11) and formed without the recesses (20).

Abstract: A conductor crimp portion (11) before being crimped to a conductor (Wa) of an electric wire includes, in an inner surface (11R) of the conductor crimp portion (11), circular recesses (20) as serrations of the conductor crimp portion (11) scattered to be spaced from each other. The recesses (20) each has an inner bottom surface (20A) in a form of a hemispherical surface.

Abstract: A conductor crimp portion (11) before being crimped to a conductor (Wa) of an electric wire includes, in an inner surface (11R) of the conductor crimp portion (11), circular recesses (20) as serrations of the conductor crimp portion (11) scattered to be spaced from each other. At an inner periphery corner portion where an inner bottom surface (20A) and an inner periphery side surface (20B) of each of the recesses (20) intersect with each other, a roundness portion (20C) for connecting the inner bottom surface (20A) with the inner periphery side surface (20B) by a smooth continuous curved surface are provided.

Abstract: A crimp-style terminal (10) is provided with: a base plate (13); a conductor crimp unit (12) which is formed, to have a substantially U-shaped cross section, from a pair of conductor swage pieces (14) which extend to both sides of the base plate (13) and are swaged to encase conductors (Wa) of a wire (W), said wire being arranged on the inner surface of the base plate (13), and which is crimped and connected to the terminals of the conductors (Wa); and a plurality of serrations (16) which are on the inner surface of the conductor crimp unit (12) and which are formed from cylindrical concave sections having identical radii. Therein, the depth of the serrations (16) formed at the rear end-side inner surface of the conductor swage pieces (14) is shallower than that of the serrations (16) formed at the front end-side inner surface of the base plate (13).