JP2017022110A - Crimp connection member, crimp connection structure, and serration member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-manufacture crimp connection member which allows for highly reliable crimp connection by making reliable contact with a crimped body having an enamel layer for coating at a low cost, and to provide a crimp connection and a serration member.SOLUTION: A crimp connection member includes a crimp part, and a serration part placed inside the crimp part, and having a plurality of holes where at least one sharp protrusion, protruding in the crimp direction to a crimped body, is formed at the opening end, respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a crimp connection member, a crimp connection structure, and a serration member that are crimp-connected to an electric wire such as an aluminum electric wire having an insulating film deposited on the surface thereof.

  When an insulating film such as an enamel layer is attached to the surface of an electric wire such as an aluminum electric wire, even if a terminal is crimped and connected to this electric wire, electrical continuity between the terminal and the electric wire is not necessarily obtained due to the presence of the insulating film. First, it was necessary to remove the insulating film to obtain good contact between the electric wire and the terminal.

  FIG. 12 shows a schematic time-series cross section for explaining a crimping operation in a conventional crimp terminal having a through hole with a sag surface.

  The operation in the case where the electric wire 120 with the enamel layer 121 attached on the surface is pressed against the connection terminal 122 having the through-hole 123a with the sagging surface as shown in FIG. In general, the enamel layer 121 is more stretchable than the electric wire 120 for protecting the electric wire, and is made of a soft material so as not to be cut even when the electric wire 120 is bent. Accordingly, as shown in FIGS. 12B and 12C, when crimping is performed and the electric wire 120 is pushed into the through hole 123a of the serration portion 123, the enamel layer 121 also extends and enters the through hole 123a. It will end up. In most cases, the through hole 123a of the serration portion 123 has a sag surface and has an obtuse angle, and even if the enamel layer 121 is pressed against this edge, it is not cut. When the enamel layer 121 that has entered the through-hole 123a extends completely, partial cutting occurs, but the enamel layer 121 covers most of the side surface of the through-hole 123a, so that the electric wire 120 and the connection terminal 122 are electrically connected. It was difficult to connect securely.

  In Patent Document 1, in order to remove or break such an insulating layer such as an enamel layer to obtain a good electrical contact, a sharp slope formed by a heap of material produced in an embossing process is formed on a connection terminal. Providing a serrated arrangement comprising a plurality of serrated structures with shape contours is described.

Special table 2013-538423 gazette

  However, according to the connection terminal having a serrated arrangement including a plurality of serrated structures described in Patent Document 1, when the connection terminal is crimped to the electric wire, the serrated structure extends in the transverse direction of the electric wire. For this reason, the serrated structure of the electric wire locally causes a reduced cross section, which may lead to deterioration of mechanical strength such as cutting.

  Further, in order to create a plurality of sawtooth structures as described in Patent Document 1, it is necessary to perform a special process in the embossing process, which complicates the manufacturing process and increases the number of processes, resulting in high manufacturing costs. There was also a problem of becoming.

  Accordingly, an object of the present invention is to provide a crimping connection that can make a reliable crimping connection without failing to be brought into contact with a body to be crimped having an enamel layer for coating and without causing the cutting of the body to be crimped. The object is to provide a member, a crimp connection structure, and a serration member.

  Another object of the present invention is to provide a crimping connection member, a crimping connection structure, and a serration member that are easy to manufacture and inexpensive to manufacture.

  According to the present invention, the serration has a plurality of holes, each of which is formed at the opening end portion with the crimping portion and at least one sharp protrusion that is arranged inside the crimping portion and projects in the crimping direction to the object to be crimped. A crimp connection member is provided.

  The serration portion has a plurality of holes in which at least one sharp projection that protrudes in the crimping direction to an object to be crimped, which is an electric wire, for example, is formed at the open end. Since such a serration part is arranged inside the crimping part of the connection terminal or the crimping sleeve, the surface of the electric wire can be obtained by inserting the crimping part into the serration part and inserting the electric wire as the object to be crimped into the serration part. The insulating enamel layer applied to the substrate is sheared by at least one sharp protrusion. As a result, the electric wire bites into the through hole, and the contact between the electric wire and the serration portion is reliably performed, so that a highly reliable crimp connection can be performed.

  The at least one sharp protrusion is preferably a protrusion having an apex angle of 90 degrees or less.

  It is also preferable that the plurality of holes of the serration portion are a plurality of through holes in which at least one protrusion protruding in the pressure bonding direction to the object to be bonded is formed at the opening end on the pressure bonding direction side.

  It is also preferable that the plurality of holes in the serration portion are a plurality of non-through holes in which at least one protrusion protruding in the pressing direction to the object to be bonded is formed at the opening end.

  It is also preferable that the serration portion is a serration member formed independently of the crimping portion, and the plurality of through holes of the serration member are press punched holes.

  In this case, it is more preferable that the at least one sharp protrusion is at least one sharp protrusion or burr formed at the opening end by press punching. When performing press punching, the die hole diameter and punch diameter are approximately equal to minimize the gap (clearance) between the die hole and punch, and at the end of the die hole ring By providing the tapered portion, an annular sharp protrusion corresponding to the annular tapered portion is formed at the opening end portion of the through hole of the serration portion. In addition, if the die hole diameter is made slightly larger than the punch diameter to provide a gap between the die hole and the punch, the front side in the punching direction is a fracture surface on the inner surface of the through hole. One or more sharp burrs are generated at the open end. In this way, it is only necessary to provide a through-hole by press punching without intentionally forming a protrusion on the serration portion, that is, whether or not there is a taper of the opening end and punch clearance at the time of punch punching in press processing Therefore, since sharp protrusions or burrs can be created, manufacturing is easy and the manufacturing cost is low.

  It is also preferable that the serration part is integrally formed as a part of the crimping part.

  It is also preferable that the serration portion has a base material made of copper or a copper alloy and a tin plating layer formed on the surface of the base material.

  It is also preferable that the crimping connection member is a crimping connection terminal provided with a tongue provided at the distal end portion and a crimping portion disposed at the proximal end of the tongue.

  It is also preferable that the crimping connection member is a crimping sleeve in which crimping portions are arranged at both ends.

  According to the present invention, the crimping connection member described above and an aluminum pressure-bonded body having a coating enamel layer inserted into and crimped into the serration portion in the crimping portion of the crimping connection member, for example, for coating An aluminum electric wire having an enamel layer is provided.

  According to the present invention, furthermore, at least one sharp projection that is arranged inside the crimping portion and projects in the crimping direction to the object to be crimped has a plurality of holes respectively formed at the opening end. A serration member is provided.

  The serration member has, for example, a plurality of holes in which at least one sharp protrusion that protrudes in the pressure-bonding direction to an object to be bonded, which is an electric wire, is formed at the opening end. Such a serration member is placed inside the crimping part of the connection terminal or the crimping sleeve, and the electric wire as the object to be crimped is inserted into the serration member, and the crimping part is crimped to adhere to the surface of the electric wire. The insulating enamel layer is sheared by at least one sharp projection. As a result, the electric wire bites into the through hole, and the contact between the electric wire and the serration member is reliably performed, so that a highly reliable crimp connection can be performed.

  The at least one sharp protrusion is preferably a protrusion having an apex angle of 90 degrees or less.

  It is also preferable that the plurality of holes are a plurality of through-holes in which at least one protrusion protruding in the pressure-bonding direction to the object to be bonded is formed at the opening end on the pressure-bonding direction side.

  It is also preferable that the plurality of holes are a plurality of non-through holes in which at least one protrusion that protrudes in the pressing direction to the object to be bonded is formed at the opening end.

  It is also preferable that the plurality of through holes of the serration member are press punched holes.

  It is also preferable to have a base material made of copper or a copper alloy and a tin plating layer formed on the surface of the base material.

  According to the present invention, the serration portion or the serration member having a plurality of holes in which at least one sharp protrusion protruding in the crimping direction is formed at the opening end is disposed in the crimp portion of the connection terminal or the crimp sleeve. Therefore, by inserting an electric wire as a member to be crimped into the serration portion or the serration member and crimping the crimp portion, the insulating enamel layer attached to the surface of the wire is at least one sharp member. Sheared by protrusions. As a result, since the electric wire bites into the through hole and the electric wire and the serration portion or the serration member are reliably contacted, a highly reliable crimp connection can be performed.

It is sectional drawing which shows schematically the structure of the crimping | compression-bonding part of a crimping connection terminal, and a serration member in order to demonstrate the structure and function of the crimping connection member of this invention. It is sectional drawing which shows roughly the partial structure of the serration member in the crimping | compression-bonding terminal of FIG. It is sectional drawing for demonstrating the crimping | compression-bonding operation | movement by the crimping connection terminal of FIG. It is sectional drawing which shows roughly the structure of the crimping | compression-bonding part and serration member of the other crimping connection member of this invention. It is sectional drawing which shows schematically the structure of the serration member in the further another crimping connection member of this invention. The whole structure of the crimping connection terminal is shown schematically as one Embodiment of the crimping connection member of this invention, (A) is a top view, (B) is a partially broken side view. It is a top view which shows an example of the serration member before bending in embodiment of FIG. FIG. 6 shows an example of a serration member after bending in the embodiment of FIG. 6, (A) is a side view, and (B) is a front view. The principle of forming sharp protrusions in the through holes formed by press punching in the embodiment of FIG. 6 is described, and (A), (B), and (C) are time-series sectional views thereof. 6 explains the principle of burr generation in a through hole formed by press punching in the embodiment of FIG. 6, (A) is a diagram schematically showing the cross-sectional shape of one through hole, and (B) is a through hole. It is a figure which shows the state of the inner surface of this. It is a typical time series sectional view explaining crimping operation in a crimp terminal which has a penetration hole without a sagging surface. It is a typical time series sectional view explaining crimping operation in the conventional crimp terminal which has a penetration hole with a sag surface.

  FIG. 1 schematically shows the structure of a crimping connection terminal and a serration member in order to explain the structure and function of the crimping connection member of the present invention, and FIG. 2 shows a part of the serration member in this crimping connection terminal. The configuration is schematically shown, and FIG. 3 illustrates the crimping operation by this crimping connection terminal.

  As shown in FIG. 1, the crimping part (barrel) 12 of the crimping connection terminal 10 is formed in a cylindrical shape in this example, and is formed independently of the crimping part 12 inside thereof. A substantially cylindrical serration member 13 is inserted. The crimping part 12 is formed in a cylindrical shape (a cross section is circular) from a flat plate of copper or copper alloy, and tin plating is applied to the surface. The serration member 13 is similarly formed from a flat plate of copper or a copper alloy, and the surface thereof is tinned.

  The serration member 13 includes a plurality of through-holes 13a. At the open end of each through-hole 13a, as shown in FIG. 1 and FIG. One sharp protrusion 13b is formed. The sharp protrusion 13b is a sharp protrusion having an apex angle of 90 degrees or less. For example, when a plurality of through holes are formed on a flat plate of copper or copper alloy by press punching, the sharp protrusion 13b is formed at the opening end in the hole punching direction. An annular sharp protrusion or one or more sharp burrs.

  FIG. 3 shows a state in which the serration member 13 having such sharp projections 13b is crimped to an enamel-coated aluminum electric wire 32 which is a member to be crimped. That is, the enamel layer 31 is covered around the aluminum electric wire 32, and when the serration member 13 is crimped to the aluminum electric wire 32, the enamel layer 31 is sheared by these sharp protrusions 13b, and aluminum is formed in the through hole 13a. The electric wire 32 bites in, and the electrical contact between the aluminum electric wire 32 and the serration member 13 is reliably performed. As a result, a reliable and reliable crimp connection can be performed.

  FIG. 4 schematically shows the structure of the crimping part and serration member of another crimping connection member of the present invention. In the example of FIG. 1, the crimping portion 12 is formed in a cylindrical shape, and a substantially cylindrical serration member 13 is inserted into the crimping portion 12. However, as shown in FIG. The serration member 43 may be formed so as to have a substantially V-shaped cross section, and a serration member 43 having a substantially V-shaped cross section and having a sharp protrusion 43b may be superimposed on the inside thereof. Further, as shown in FIG. 4B, the crimping portion 42 ′ is formed in a rectangular tube shape (cross section is rectangular), and a serration member 43 ′ having a sharp projection 43 b ′ having a rectangular tube shape is superimposed on the inside thereof. You may comprise so that it may be made.

  FIG. 5 schematically shows a configuration of a serration member in still another crimp connection member of the present invention. As shown in the figure, as the serration member 53, a member provided with a plurality of non-through holes 53a in which sharp projections 53b projecting in a crimping direction to an object to be crimped such as an electric wire are provided at the opening end. May be.

  Next, the present invention will be described in detail with more specific embodiments. FIG. 6 schematically shows the overall configuration of a crimp connection terminal as an embodiment of the crimp connection member of the present invention.

  As shown in the figure, the crimping connection terminal 60 of the present embodiment is provided at the distal end portion and connected to the counterpart component, and is provided at the proximal end of the tongue portion 61. And a crimping part (barrel) 62 to be crimped to the electric wire as a body. The crimping part 62 is formed in a cylindrical shape, and a substantially cylindrical serration member 63 is inserted therein.

  The tongue portion 61 and the crimping portion 62 are integrally formed from a flat plate of copper or copper alloy into the shape shown in the figure, and the surface is tin-plated. The crimp connection terminal portion excluding the serration member 63 in this embodiment is commercially available as a crimp terminal.

  FIG. 7 shows the serration member 63 ′ before bending in the present embodiment, and FIG. 8 shows the serration member 63 after bending.

  As shown in FIG. 7, the serration member 63 ′ has a large number of through holes 63 a formed by press punching a flat plate of copper or a copper alloy. A sharp protrusion 63b is formed. A flat cylindrical serration member 63 as shown in FIG. 8 is formed by bending the flat serration member 63 ′ so that both lateral ends in FIG. As an example only, when the inner diameter of the crimping portion 62 of the crimping connection terminal 60 is about 1.7 φ (mm), the outer diameter of the cylindrical serration member 63 is about 1.7 φ (mm) which is substantially equal to this. For example, the circumferential length of the serration member 63 ′ before bending is about 4.5 (mm), the axial length is about 5.0 (mm), and the thickness is about 0.15 (mm). The pitch of adjacent through holes 63a in the serration member 63 'is about 0.3 (mm), and the inner diameter of the through holes 63a is about 0.15 (mm).

  The serration member 63 ′ or 63 is formed by performing tin plating on the surface of copper or a copper alloy (for example, a copper nickel alloy). The tin plating may be performed on the flat plate-like serration member 63 ′ subjected to press punching, or may be performed on the substantially cylindrical serration member 63 after being bent.

  FIG. 9 illustrates the principle of forming sharp protrusions in the through holes formed by press punching in the present embodiment.

  As shown in FIG. 9A, when the press punching process is performed, the diameter of the hole of the die 90 and the diameter of the punch 92 are made substantially equal so that the gap between the hole of the die 90 and the punch 92 is minimized. At the same time, an annular tapered portion 90 a is provided at the opening end of the hole of the die 90.

  Next, as shown in FIG. 9B, when the punch 92 is relatively lowered and pushed into the hole of the die 90 on which the flat plate 91 'of copper or copper alloy is placed, the flat plate 91' is pushed. It is extended and pushed into the annular taper 90a.

  Further, when the punch 92 is lowered, as shown in FIG. 9C, a through hole is formed in the flat plate 91 ′, and a serration portion 91 is formed. At that time, an annular sharp protrusion 91b having a shape corresponding to the annular taper portion 90a is formed at the opening end portion of the through hole of the serration portion 91.

  FIG. 10 illustrates the principle of burr generation in each through-hole formed by press punching in the modified embodiment of the present embodiment.

  When press punching is performed, if the hole diameter of the die 106 is made slightly larger than the diameter of the punch 107 to provide a gap (clearance) C between the hole of the die 106 and the punch 107, punching will be performed as described below. One or more sharp burrs protruding in the direction are generated.

  Hereinafter, the principle of burr generation in press punching will be described. The punching direction with respect to the through hole 101 is assumed to be from the top to the bottom as shown by the arrow 100 in FIG.

  As shown in FIG. 10A, when the punch 107 descends relative to the die 106 on which the flat plate is placed in the direction of the arrow 100 and further lowers in contact with the surface of the flat plate, the punch 107 of the flat plate is obtained. In addition, the contact surface of the die 106 is gradually smoothened to form a sagging surface having a smooth R shape. FIGS. 10A and 10B show a sag surface 102 formed on the blade surface side of the punch 107. That is, a sag surface 102 having a smooth shape is finally formed in the upper opening on the inner surface of the through hole 101.

  Further, when the punch 107 is relatively lowered, the flat plate material near the cutting edge of the punch 107 and the die 106 yields, and the punch 107 and the die 106 perform shear deformation, which is a kind of plastic deformation, near the surface in the flat plate material. Gradually go deeper. FIGS. 10A and 10B show a shearing surface 103 formed on the blade surface side of the punch 107. That is, a shear surface 103 having vertical bars is finally formed below the sag surface 102 on the inner surface of the through hole 101.

  When the punch 107 and the die 106 further bite, the flat plate material in contact with the side surface of the punch 107 or the die 106 is subjected to a very large tensile strain, and cracks (cracks) start to be generated from this portion. This crack grows along the clearance C between the punch 107 and the die 106, and the cracks in both the punch 107 and the die 106 are connected to complete punching. FIGS. 10A and 10B show a fracture surface 104 formed on the blade surface side of the punch 107. That is, a fracture surface 104 is finally formed below the shear surface 103 on the inner surface of the through hole 101.

  Further, due to the presence of the clearance C between the punch 107 and the die 106, one or a plurality of sharp burrs 105 are formed on the surface of the flat plate material on the die 106 side which is the front side in the punching direction. FIGS. 10A and 10B show a sharp burr 105 formed on the surface of the flat plate material on the die side which is the front side in the punching direction. That is, one or a plurality of sharp burrs 105 protruding in the punching direction are finally formed in the lower opening on the inner surface of the through hole 101. Note that the height of the burr 105 can be adjusted by changing the clearance C between the punch 107 and the die 106.

  FIG. 11 shows a schematic time-series cross section for explaining a crimping operation in a crimp terminal having a through hole without a sagging surface.

  The operation in the case where the electric wire 110 with the enamel layer 111 attached to the surface is pressed against the connection terminal 112 having the through hole 113a having no sagging surface as shown in FIG. Compared with the case of FIG. 12, when the serration portion 113 has a through hole 113 a without a sag surface, crimping is performed and the electric wire 110 penetrates the serration portion 113 as shown in FIGS. When pushed into the hole 113a, the enamel layer 111 is sheared at the edge of the through hole 113a. Therefore, in this case, the side surface of the through hole 113a and the electric wire 110 are in contact with each other, and the electric wire 110 and the connection terminal 112 are electrically connected.

  In particular, in this embodiment, since a sharp protrusion is formed at the opening portion of the through hole of the serration portion, the enamel layer is reliably sheared, and a reliable electrical connection between the electric wire and the connection terminal is performed. Highly conductive can be obtained.

  As described above in detail, according to the present embodiment, the serration member 13 (see FIG. 3) has the plurality of through holes 13a formed by press punching, and thus the plurality of through holes 13a are A sharp protrusion 13b protruding in the punching direction is formed at the opening end on the front side in the punching direction. The serration member 13 is bent so that the surface on which the sharp protrusions 13b are formed becomes the inner surface, and the serration member 13 is inserted into the crimp portion of the crimp connection terminal. It is fitted. For this reason, by inserting the aluminum wire 32 into the serration member 13 and performing a crimping operation, the sharp projection 13b shears the insulating enamel layer 31 deposited on the surface of the aluminum wire 32, and the aluminum wire Since 32 bites into the through-hole 13a and the contact between the aluminum electric wire 32 and the serration member 13 is reliably performed, a highly reliable crimp connection can be performed. Further, it is only necessary to provide the through holes 13a by press punching without intentionally forming the protrusions on the serration member 13 by performing a special treatment, that is, sharp protrusions by punch punching in press processing. Since generation | occurrence | production of 13b can be adjusted intentionally, manufacture is easy and manufacturing cost becomes cheap.

  Furthermore, according to the present embodiment, since the enamel layer 31 is sheared, the aluminum wire 32 can be crimped to the serration member 13 until it reaches a completely plastic region, whereby aluminum and tin plated on the terminal surface Therefore, the occurrence of electrolytic corrosion can be reliably prevented. Moreover, since the oxide film of the aluminum electric wire 32 can be destroyed by the sharp protrusion 13b, the influence on the contact resistance can be prevented. Furthermore, since the sharp protrusion 13b can suppress the deformation amount of the aluminum electric wire 32 to the minimum amount required, it is possible to prevent a decrease in tensile strength. Furthermore, the repulsive force (internal stress) of the contact boundary surface is obtained by blocking the stress-enhanced part and other slow part by being surrounded by the sharp protrusion 13b and concentrating the stress in the confined region. Can be maintained to prevent cold flow.

  In the above-described embodiment, the serration member has a substantially cylindrical shape, but the shape of the serration member is not limited to this, and may be any shape that matches the shape of the crimping part (barrel). be able to. For example, the cross-sectional shape of the serration member is not limited to a circular shape, but an oval shape, an elliptical shape, a rectangular shape (see FIG. 4B), a substantially V-shaped shape (see FIG. 4A), or other It can be a shape.

  In the embodiment described above, an aluminum electric wire having an enamel layer deposited on the surface is used as the electric wire. However, an aluminum alloy wire having an enamel layer deposited on the surface and an enamel layer deposited on the surface. A copper wire, a copper alloy wire having an enamel layer deposited on the surface, or another metal electric wire having an enamel layer deposited on the surface may be used.

  Furthermore, although the embodiment described above is a case of a crimp connection terminal having a tongue and a crimp part, the crimp connection member of the present invention is a crimp sleeve having a crimp part of the configuration as described above at both ends. There may be.

  All the embodiments described above are illustrative of the present invention and are not intended to be limiting, and the present invention can be implemented in other various modifications and changes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

10, 63 Crimp connection terminal 12, 62 Crimp part 13, 63, 63 ', 67, 91 Serration member 13a, 63a, 101, 113a, 123a Through hole 13b, 63b, 91b, 93 Protrusion 31, 111, 121 Enamel layer 32 Aluminum wire 61 Tongue portion 64, 91 'Flat plate 65 Serration member portion 66 Outer portion 90, 107 Die 90a Open end taper portion 92, 106 Punch 100 Punching direction 102 Sag 103 Shear surface 104 Fracture surface 105 Burr 110, 120 Electric wire 112, 122 Connection terminal 113, 123 Serration section

Claims (16)

  A pressure-bonding portion, and a serration portion that is arranged inside the pressure-bonding portion and has a plurality of holes each having at least one sharp protrusion that protrudes in the pressure-bonding direction to the object to be bonded and is formed in the opening end portion. A crimping connection member characterized by that.   The crimp connection member according to claim 1, wherein the at least one sharp protrusion is a protrusion having an apex angle of 90 degrees or less.   2. The plurality of holes of the serration portion are a plurality of through holes in which at least one protrusion protruding in a pressure bonding direction to a member to be bonded is formed at an opening end portion on a pressure bonding direction side. Or the crimping connection member of 2.   The plurality of holes in the serration portion are a plurality of non-through holes in which at least one protrusion protruding in a pressing direction to a member to be bonded is formed at an opening end. The crimping connection member described.   The crimping according to claim 3, wherein the serration portion is a serration member formed independently of the crimping portion, and the plurality of through holes of the serration member are press punched holes. Connection member.   The crimp connection member according to claim 1, wherein the serration portion is integrally formed as a part of the crimp portion.   The said serration part has the base material by copper or a copper alloy, and the tin plating layer formed in the surface of this base material, The any one of Claim 1 to 6 characterized by the above-mentioned. Crimp connection member.   The crimping connection member is a crimping connection terminal including a tongue provided at a distal end and the crimping part disposed at a proximal end of the tongue. The crimping connection member according to any one of the above.   The crimping connection member according to any one of claims 1 to 7, wherein the crimping connection member is a crimping sleeve in which the crimping part is disposed at both ends.   A crimped connection member according to any one of claims 1 to 9, and a crimped connection member made of aluminum having an enamel layer for covering inserted into and crimped into the serration portion of the crimped portion of the crimped connection member A crimp connection structure characterized by comprising a body.   A serration member, wherein the serration member has a plurality of holes each formed at an opening end portion and disposed at an inner side of the crimping portion and protruding at least one sharp projection projecting in a crimping direction to an object to be crimped.   The serration member according to claim 11, wherein the at least one sharp protrusion is a protrusion having an apex angle of 90 degrees or less.   The plurality of holes are a plurality of through holes in which at least one protrusion protruding in a pressure bonding direction to the object to be bonded is formed at an opening end on a pressure bonding direction side. Serration member.   13. The serration member according to claim 11, wherein the plurality of holes are a plurality of non-through holes in which at least one protrusion protruding in a pressing direction to the object to be bonded is formed at an opening end. .   The crimp connection member according to any one of claims 11 to 14, wherein the plurality of through holes of the serration member are press punched holes.   The serration member according to any one of claims 11 to 15, further comprising a base material made of copper or a copper alloy and a tin plating layer formed on the surface of the base material.

Images