JP2009043647A - Crimp terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crimp terminal surely crimping an object to be crimped. <P>SOLUTION: The crimp terminal is composed to be able to have an electric wire 100 inserted inside a curved part 21 (space 42) formed by bending back a central part 24 between one end part 23 and another end part 22. In addition, the wire 100 (object to be crimped) can be crimped inside the curved part 21. One end part 23 is bent in a V shape at an intermediate part 23a and goes farther away from the other end part 22 going from the intermediate part 23a toward a tip part 23b on one end part 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a crimp terminal configured to be capable of crimping a crimping object inserted inside a bending portion.

As this type of crimp terminal, a terminal disclosed in Japanese Patent Application Laid-Open No. 62-15810 is known. This terminal is a terminal used for fusing connection, and includes a flat plate portion and a cut and raised piece. When connecting a winding as the object to be crimped to this terminal, insert the end of the winding between the flat plate and the cut and raised piece, and then move the cut and raised piece of the terminal up and down with the electrode. A fusing current is allowed to flow between both electrodes while being pressed (pressed) while sandwiched from the direction. At this time, due to the heat generated by the fusing current flowing, the insulating film of the winding and the metal film on the surface of the terminal are melted, and the terminal and the copper wire of the winding are electrically and mechanically connected.
Japanese Patent Laid-Open No. 62-15810 (page 3, FIG. 1)

  However, this type of crimp terminal including the above terminal has the following problems. That is, as shown in FIG. 9 (see also FIG. 1 of the above publication), this type of crimp terminal has one end side (the cut and raised piece in the above terminal) curved so that the central portion of the belt-like member is curved. A crimping portion 311 formed by folding back to the other end (the flat plate portion of the terminal) is provided. Also, in this type of conventional crimp terminal, generally, the length between the one end 312 side and the other end 313 is from the opening 314 side (left side in the figure) to the curved part 315 side (same figure). In other words, the one end 312 side is inclined with respect to the other end 313 side. For this reason, in the conventional crimping terminal, as shown in the figure, when the crimping portion 311 is pressed up and down, the horizontal component F1 of the pressing force F0 is directed toward the opening 314 and the electric wire 100 (crimping). As a result of acting on the object, as shown in FIG. 10, the electric wire 100 may move toward the opening 314 side and come off from the crimping part 311, and the crimping may fail. Therefore, the conventional crimp terminal has a problem that the work efficiency is reduced by that amount due to the failure of the crimp. Further, when crimping fails, the crimp terminal itself cannot be used, and there is a problem that the manufacturing cost increases due to the loss.

  This invention is made | formed in view of this problem, and it aims at providing the crimp terminal which can crimp | crimp a crimping | bonding target object reliably.

  In order to achieve the above object, the crimp terminal according to claim 1 is configured such that a crimp object can be inserted inside a curved portion formed by bending back a central portion between one end and the other end, and A crimping terminal capable of crimping the crimping object inside a curved portion, wherein the one end is bent into a V shape at an intermediate portion thereof, and the other end is moved from the intermediate portion toward the tip of the one end portion. It is formed so as to be separated from the end.

  The crimp terminal according to claim 2 is the crimp terminal according to claim 1, wherein the one end is perpendicular to the other end and sandwiches a first imaginary plane passing through the fold of the intermediate portion. Is formed so as to be located on the opposite side of the bending portion.

  The crimp terminal according to claim 3 is the crimp terminal according to claim 1 or 2, wherein the one end portion is parallel to a second virtual plane including one surface of the other end portion facing the intermediate portion. The longest length from the third virtual plane passing through the outer periphery of the curved portion furthest away from the two virtual planes to the tip is longer than the length from the second virtual plane to the intermediate portion. Has been.

  The crimp terminal according to claim 4 is the crimp terminal according to any one of claims 1 to 3, wherein the shortest length connecting the other end and the intermediate portion is in the direction of the shortest length. It is comprised so that it may become shorter than the longest length inside the said curved part along.

  According to the crimp terminal according to claim 1, the one end portion is formed so as to be bent in a V shape at the intermediate portion and away from the other end portion as it goes from the intermediate portion toward the tip. By making the length up to, for example, before the pressing part of the crimping machine comes into contact with the curved part, the intermediate part of one end part can be brought into contact with or close to the other end part. For this reason, it is possible to reliably prevent a situation in which the bending portion is deformed while the gap between the intermediate portion and the other end portion is wide open and the crimping target body is pushed out of the bending portion. The body can be securely crimped.

  According to the crimp terminal according to claim 2, the one end is formed so that the tip is located on the opposite side of the curved portion across the first virtual plane that is orthogonal to the other end and passes through the fold of the intermediate portion. Thus, for example, when being pressed by the pressing portion of the crimping machine, it is possible to reliably prevent a situation where the distal end side portion of the one end portion and the bending portion side portion of the one end portion are deformed so as to be folded. Therefore, according to this crimping terminal, it is possible to reliably prevent a situation in which the crimped object is detached from the crimping terminal by opening the intermediate part and the other end by being deformed in a state where both the parts are folded. Can do. In addition, since the situation where both the above-mentioned parts are folded can be surely prevented, the other end and the one end can be reliably brought into contact with each other. As a result, the strength of the crimping part is high, and the crimping part is thin and has an appearance. The object to be bonded can be bonded in a good state.

  According to the crimp terminal according to claim 3, by forming the one end so that the longest length from the third virtual plane to the tip is longer than the length from the second virtual plane to the intermediate portion, for example, The intermediate portion of the one end can be reliably brought into contact with the other end before the pressing portion of the crimping machine comes into contact with the curved portion. For this reason, since the curved portion is deformed in a state where the gap between the intermediate portion and the other end is closed, it is possible to more surely prevent the situation where the crimped object is pushed out of the crimp terminal, The object to be bonded can be bonded more reliably.

  According to the crimp terminal according to claim 4, the shortest length connecting the other end and the intermediate portion is configured to be shorter than the longest length inside the curved portion along the shortest length. Therefore, the portion on one side of the bending portion is inclined so as to be closer to the other end as the distance from the bending portion increases, so that, for example, the portion is crimped with deformation due to pressing from the pressing portion of the crimping machine. When contacting the target object, the horizontal component of the pressing force from the pressing part can be applied to the crimping target object toward the bending part side. Therefore, according to this crimp terminal, even if the portion on the bending portion side at one end contacts the crimping target body in a state where the intermediate portion and the other end are open, the crimping target body is directed toward the bending portion. Therefore, it is possible to more reliably prevent the crimping object from being detached from the crimp terminal.

  Hereinafter, the best mode of a crimp terminal according to the present invention will be described with reference to the accompanying drawings.

  First, the configuration of the crimp terminal 1 will be described. A crimp terminal 1 shown in FIG. 1 is an example of a crimp terminal according to the present invention, and includes a main body portion 2 and a crimp portion 3, and is configured to be electrically connectable by crimping an electric wire 100, for example. The crimp terminal 1 is also configured to be capable of fusing connection while crimping the electric wire 100 using a fusing crimping machine 200 (see FIG. 4). In this case, the electric wire 100 is an example of an object to be crimped in the present invention, and includes, for example, a copper wire and an insulating film formed around the copper wire. On the other hand, the crimp terminal 1 is manufactured by processing a plate-like member 1a (see FIG. 2) which is made of a conductive metal such as copper or aluminum and has a tin thin film formed on the surface. The

  The main body 2 is composed of a rectangular portion 11 (upper portion in FIG. 2) of the plate member 1a. In addition, the main body 2 is formed with a fixing hole 2a used when fixing the crimp terminal 1 to the terminal block, for example.

  The crimping part 3 is formed by bending the belt-like part 12 (the lower part in FIG. 2) of the plate-like member 1a. As shown in FIGS. 4 to 8, the crimping portion 3 is configured so that the electric wire 100 can be inserted into a space 42 described below (inside the bending portion in the present invention), and the pressing portion of the fusing crimping machine 200. When pressed by 201a, 201b (hereinafter, also referred to as “pressing portion 201” when not distinguished), the electric wire 100 can be crimped into the space 42. Specifically, as shown in FIGS. 2 and 3, the crimping part 3 curves the one end part 23 in the length direction of the belt-like part 12 (left and right direction in the figure) and the central part 24 of the other end part 22. The portion formed by the bent central portion 24 is also referred to as “curved portion 21”.

  In this case, as shown in FIG. 3, the other end portion 22 is formed in a flat plate shape that is flush with the main body portion 2 (that is, maintained in an unbent state). Further, as shown in the figure, the one end portion 23 is formed to be bent in a V shape at the intermediate portion 23a and to be separated from the other end portion 22 as it goes from the intermediate portion 23a to the tip end 23b. Specifically, a portion of the one end portion 23 that is located closer to the bending portion 21 than the intermediate portion 23a (hereinafter, this portion is also referred to as “inclined portion 31”) is separated from the bending portion 21 in a non-pressed state. As it goes on (that is, toward the intermediate part 23a), it is inclined so as to approach the other end 22. Further, a portion of the one end portion 23 located on the tip 23b side (opposite side to the bending portion 21) with respect to the intermediate portion 23a (hereinafter, this folded portion is also referred to as “folded portion 32”) is not pressed. In the state, it is inclined so as to be separated from the other end 22 as it goes from the intermediate part 23a to the tip 23b. In this case, the folding angle θ of the folding portion 32 with respect to the inclined portion 31 is defined as about 90 ° as an example.

  In addition, as shown in FIG. 3, the one end portion 23, when not pressed, sandwiches the first virtual plane S <b> 1 that is orthogonal to the other end portion 22 and passes through the crease C of the intermediate portion 23 a, and the distal end 23 b has the curved portion 21. It is formed so as to be located on the opposite side (left side in the figure). Furthermore, the one end portion 23 is parallel to the second virtual plane S2 (see the same figure) including the upper surface 22b (one surface in the present invention) of the other end portion 22 facing the intermediate portion 23a in the non-pressed state and the second virtual plane. The tip 23b is above (the other end 22) the third virtual plane S3 (see the same figure) passing through the outer peripheral portion of the curved portion 21 that is furthest away from the plane S2 (hereinafter, this portion is also referred to as the “top 21a”). It is formed so as to protrude in a direction away from the head. The one end portion 23 has a longest length L3 from the third virtual plane S3 to the tip 23b, from the second virtual plane S2 to the intermediate portion 23a (hereinafter, the portion between both is also referred to as “opening 41”). (Hereinafter, this length is also referred to as “length L1” of the opening 41).

  In this case, in this crimp terminal 1, the diameter L1 of the opening 41 is slightly longer than the diameter of the wire 100 to be crimped, in other words, the diameter is slightly shorter than the length L1 of the opening 41. The crimping part 3 is formed so that the electric wire 100 can be crimped. In the crimp terminal 1, as described above, the inclined portion 31 is inclined so as to approach the other end portion 22 as the distance from the curved portion 21 increases. For this reason, in this crimp terminal 1, as shown in FIG. 3, the above-described length L1 (the shortest length connecting the other end portion and the intermediate portion in the present invention) is the bending portion 21, the other end portion 22 and The longest length along the direction of the length L1 in the space (inside of the curved portion in the present invention) 42 surrounded by the inclined portion 31 (one end portion 23), that is, the length from the bottom 42a to the top 42b in the space 42. The crimp part 3 is configured to be shorter than L2 (so that the length L2 is longer than the length L1).

  Next, a method for crimping an electric wire 100 as a crimping target body to the crimp terminal 1 using the fusing crimping machine 200 and performing fusing connection will be described with reference to the drawings.

  First, as shown in FIGS. 1 and 3, the end of the electric wire 100 is inserted into the space 42 from the opening 41 of the crimping part 3 in the crimping terminal 1. Next, as shown in FIG. 4, the crimping part 3 is sandwiched between the pressing parts 201 a and 201 b of the fusing crimping machine 200. In this case, in the crimp terminal 1, the tip 23 b of the one end portion 23 protrudes above the third virtual plane S 3 that passes through the top portion 21 a of the bending portion 21. For this reason, as shown in the figure, the pressure-bonding portion 3 is sandwiched with the pressing portion 201 a in contact with the tip 23 b of the folded portion 32 and the pressing portion 201 b in contact with the lower surface 22 a of the other end portion 22.

  Subsequently, the pressing part 201a is moved downward and the pressing part 201b is moved upward. At this time, as shown in FIG. 5, the bending portion 21 is hardly deformed, and the one end portion 23 (the inclined portion 31 and the folded portion 32) is mainly formed by the pressing force from the pressing portions 201a and 201b. It is deformed in the closing direction (downward in the figure). In this case, in the crimp terminal 1, the inclined portion 31 is inclined so as to approach the other end portion 22 as it is separated from the curved portion 21 (toward the intermediate portion 23 a). For this reason, as shown in the figure, when the inclined portion 31 comes into contact with the electric wire 100 along with the deformation, the horizontal component F1 of the pressing force F0 from the pressing portion 201a is changed to the bending portion 21 side (the opening portion 41 and As a result of acting on the electric wire 100 toward the opposite side (back side of the space 42), the electric wire 100 can be moved toward the bending portion 21. Therefore, the situation where the electric wire 100 is detached from the crimping portion 3 is reliably prevented.

  On the other hand, for example, in a configuration in which the distal end 23b of the one end portion 23 is positioned on the curved portion 21 side with respect to the first virtual plane S1 in the non-pressed state, when the pressing portions 201a and 201b are pressed, a broken line in FIG. As shown by, the folded portion 32 and the inclined portion 31 are deformed so as to overlap each other. For this reason, with this deformation, the intermediate portion 23 a moves in a direction away from the other end portion 22 to open the opening 41, and as a result, the electric wire 100 may be detached from the crimping portion 3. Further, in this configuration, when the folded portion 32 and the inclined portion 31 are further deformed in a folded state, even if the electric wire 100 is crimped, the other end portion 22 and the one end portion 23 (folded portion 32). Are not sufficiently in contact with each other, the strength of the crimped portion may be reduced, or the crimped portion may be thick, resulting in poor appearance. On the other hand, in the crimp terminal 1, in the non-pressed state, one end portion 23 is formed so that the tip 23b is located on the opposite side to the bending portion 21 with the first virtual plane S1 interposed therebetween. For this reason, when pressed by the pressing portions 201a and 201b, the folded portion 32 and the inclined portion 31 do not overlap, and the intermediate portion 23a is deformed in a direction close to the other end portion 22 (direction in which the opening 41 closes). Be made. As a result, the situation in which the opening 41 is opened and the electric wire 100 is detached from the crimping portion 3 is reliably prevented. Moreover, since the situation where the folding | returning part 32 and the inclination part 31 overlap is reliably prevented and the other end part 22 and the one end part 23 contact reliably, the intensity | strength of a crimping part is high, and also a crimping part is thin, and an external appearance Can be crimped in a good state.

  Next, when both the pressing portions 201a and 201b are further moved in the above-described direction, the intermediate portion 23a of the one end portion 23 comes into contact with the upper surface 22b of the other end portion 22 and the opening portion 41 is closed as shown in FIG. It will be in the state. In this case, in the crimp terminal 1, the one end portion 23 is formed so that the longest length L3 from the third virtual plane S3 to the tip 23b is longer than the length L1 of the opening 41 in the non-pressed state. Yes. Therefore, as shown in FIGS. 5 and 6, the pressing portion 201 a contacts the top portion 21 a of the bending portion 21 until the intermediate portion 23 a of the one end portion 23 contacts or approaches the upper surface 22 b of the other end portion 22. Instead, the pressing force from the pressing portion 201 a acts intensively on the tip 23 b of the one end portion 23. For this reason, it is avoided that the pressing part 201a contacts the top part 21a before the opening part 41 is closed. As a result, the bending part 21 is deformed while the opening part 41 is opened, and the electric wire 100 is connected to the crimping part 3 ( The situation of being pushed out of the space 42) is reliably prevented.

  Subsequently, when both the pressing portions 201a and 201b are further moved in the above-described direction, the pressing portion 201a comes into contact with the top portion 21a of the bending portion 21 as shown in FIG. Deformed. Next, when both pressing portions 201a and 201b are further moved in the above-described direction, the bending portion 21 and the one end portion 23 are further deformed as shown in FIG. 8, and the electric wire 100 is deformed along with the deformation. .

  On the other hand, when the pressing portions 201a and 201b move by a predetermined length (for example, when the pressing portions 201a and 201b move until the pressing portion 201a contacts the top portion 21a of the bending portion 21), the pressing portions 201a and 201b. To supply fusing current. At this time, the fusing current supplied to the pressing parts 201a and 201b flows to the crimping part 3 and the electric wire 100, and the crimping part 3 and the electric wire 100 generate heat by the fusing current. As a result, the insulating coating of the electric wire 100 is melted to expose the copper wire, and the tin thin film of the plate-like member 1a constituting the crimping portion 3 is melted to weld the copper wire and the crimping portion 3 together.

  Subsequently, when the pressing portions 201a and 201b are moved by a predetermined length (when the pressing portions 201a and 201b are moved until the electric wire 100 is deformed), the movement of the pressing portions 201a and 201b is stopped and fusing is performed. Stop supplying current. Next, the pressing portions 201a and 201b are moved in the direction opposite to the above-described direction to be positioned at the initial position. Thus, the crimping of the electric wire 100 is completed. In this case, in this crimp terminal 1, as described above, a situation in which the electric wire 100 is detached from the crimp part 3 during the crimping is surely prevented. For this reason, in this crimp terminal 1, it is possible to reliably crimp the electric wire 100.

  Thus, according to this crimp terminal 1, by forming the one end portion 23 so as to be bent in the V shape at the intermediate portion 23a and away from the other end portion 22 from the intermediate portion 23a toward the tip end 23b, For example, by increasing the length from the intermediate portion 23a to the tip 23b, the intermediate portion 23a of the one end portion 23 can be brought into contact with or close to the other end portion 22 before the pressing portion 201a comes into contact with the bending portion 21. it can. Therefore, it is possible to reliably prevent the bending portion 21 from being deformed while the intermediate portion 23a and the other end portion 22 (opening portion 41) are wide open and the electric wire 100 being pushed out of the crimping portion 3. As a result, the electric wire 100 can be reliably crimped.

  Further, according to the crimp terminal 1, the distal end 23 b is located on the opposite side of the bending portion 21 across the first virtual plane S <b> 1 that is orthogonal to the other end portion 22 and passes through the fold C of the intermediate portion 23 a in the non-pressed state. By forming the one end portion 23 as described above, it is possible to reliably prevent the folded portion 32 and the inclined portion 31 from being deformed so as to be folded when pressed by the pressing portion 201. Therefore, according to this crimp terminal 1, a situation in which the wire 100 is disconnected from the crimping part 3 by opening the gap between the intermediate part 23 a and the other end part 22 (opening 41) by being deformed in a state where both are folded. It can be surely prevented. Moreover, since the situation where the folding | returning part 32 and the inclination part 31 overlap can be prevented reliably, as a result of being able to contact the other end part 22 and the one end part 23 reliably, the intensity | strength of a crimping | compression-bonding part is high, The electric wire 100 can be crimped in a state where the crimped portion is thin and the appearance is good.

  Further, according to the crimp terminal 1, the length L3 from the third virtual plane S3 to the tip 23b that passes through the top 21a of the curved portion 21 and is parallel to the second virtual plane S2 is an intermediate portion from the second virtual plane S2. By forming the one end portion 23 so as to be longer than the length up to 23a (the length L1 of the opening portion 41), the intermediate portion 23a of the one end portion 23 is changed to another before the pressing portion 201a contacts the bending portion 21. The end portion 22 can be reliably brought into contact with the end portion 22. For this reason, since the bending portion 21 is deformed in a state where the gap (opening portion 41) between the intermediate portion 23a and the other end portion 22 is closed, it is possible to more reliably prevent the electric wire 100 from being pushed out of the crimping portion 3. As a result, the electric wire 100 can be more reliably crimped.

  Furthermore, according to this crimp terminal 1, the crimping part 3 is connected so that the shortest length L1 connecting the other end part 22 and the intermediate part 23a is shorter than the length L2 from the bottom part 42a to the top part 42b of the space 42. Since the inclined portion 31 constituting the space 42 is inclined so as to be closer to the other end portion 22 as it is separated from the curved portion 21, the inclined portion 31 comes into contact with the electric wire 100 along with the deformation. In addition, the horizontal component force F1 of the pressing force F0 from the pressing portion 201a can be applied to the electric wire 100 toward the bending portion 21 side. Therefore, according to this crimp terminal 1, even if the inclined portion 31 contacts the electric wire 100 in the state in which the opening 41 is open, the electric wire 100 can be moved toward the bending portion 21, so that the electric wire 100 is The situation where it comes off from the crimping part 3 can be prevented more reliably.

  In addition, this invention is not limited to said structure. For example, in the non-pressed state, the end 23b protrudes upward from the top 21a of the bending portion 21, and the one end 23 is configured so that the length L3 is longer than the length L1. However, the length L3 is not limited to this, as long as the intermediate portion 23a is folded back into a V shape so as to be close to the other end 22 and away from the other end 22 in the non-pressed state. (That is, the length of the folded portion 32) and the folding angle θ of the folded portion 32 with respect to the inclined portion 31 can be arbitrarily defined. Specifically, the length of the folded portion 32 and the folded angle θ can be defined so that the tip 23b does not protrude upward from the top portion 21a of the curved portion 21, and the length L3 is equal to or less than the length L1. It is also possible to define the length of the folded portion 32 and the folding angle θ. Further, the length L1 of the opening 41 and the length L2 of the space 42 can be arbitrarily defined.

  Moreover, as a material of the plate-shaped member 1a, it is not limited to copper or aluminum, It can form with various materials which have electroconductivity. Further, the material of the thin film formed on the surface of the plate-like member 1a is not limited to tin, and various materials having conductivity can be used, and the plate-like member 1a on which no thin film is formed is employed. You can also. Moreover, although it described above about the usage example which carries out the fusing connection, crimping | bonding the electric wire 100 using the fusing crimping machine 200, the electric wire 100 can also be electrically connected only by crimping without flowing a fusing current. Even in this case, the same effects as those described above can be realized. Furthermore, it is needless to say that the same effects as those described above can be realized even when various types of crimping objects are crimped without being limited to the electric wire 100 described above.

1 is a perspective view showing a configuration of a crimp terminal 1. FIG. It is a plate-shaped member 1a top view before a process. It is the front view of the crimp terminal 1 seen in the direction of the arrow A in FIG. It is the 1st explanatory view for explaining the press bonding method. It is the 2nd explanatory view for explaining a press bonding method. It is the 3rd explanatory view for explaining the crimping method. It is the 4th explanatory view for explaining the crimping method. It is 5th explanatory drawing for demonstrating the crimping | compression-bonding method. It is the 1st explanatory view for explaining the state where electric wire 100 is crimped to the conventional crimp terminal. It is the 2nd explanatory view for explaining the state where electric wire 100 is crimped to the conventional crimp terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crimp terminal 3 Crimp part 12 Band-shaped part 21 Curved part 21a Top part 22 Other end part 23 One end part 23a Intermediate part 23b Tip 24 Central part 42 Space 100 Electric wire C Folding L1-L3 Length P Straight line S1 1st virtual plane S2 2nd Virtual plane S3 Third virtual plane

Claims (4)

A crimping terminal configured to be able to insert a crimping object inside a bending part formed by bending back a central part between one end and the other end, and capable of crimping the crimping object inside the bending part Because
The one end portion is a crimp terminal that is bent at an intermediate portion thereof into a V shape and is separated from the other end portion toward the tip of the one end portion from the intermediate portion.   2. The one end portion is formed such that the tip is located on the opposite side of the bending portion with a first virtual plane perpendicular to the other end portion and passing through a fold of the intermediate portion. The crimp terminal described.   The one end portion is parallel to a second imaginary plane including one surface of the other end portion facing the intermediate portion, and passes from the third imaginary plane passing through the outer peripheral portion of the curved portion that is farthest from the second imaginary plane. The crimp terminal according to claim 1 or 2, wherein the longest length to the tip is longer than the length from the second virtual plane to the intermediate portion.   The shortest length connecting the other end portion and the intermediate portion is configured to be shorter than the longest length inside the curved portion along the direction of the shortest length. Crimp terminal according to any one of the above.

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