JP2008176970A - Crimp terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent molten hot melt from adhering to a contact mounting portion, and to increase the strength as a crimp terminal, and to always electrically connect the contact mounting portion in a completely fixed state. Provided is a crimp terminal that can be firmly fixed to an object.
A crimp terminal 1 bent into a crank shape in a side view includes a contact mounting part 3, a connecting part 4, and a mounting part 5. The caulking portions 9 and 10 for crimping and fixing the wiring member 2 are formed on the mounting portion 5, and the concave first bent portion 12 and the convex second bent portion 13 are respectively provided with a protruding portion 14 and a dimple. 15 is formed. The mounting portion 5 is formed with a protruding core wire locking portion 6 and an outflow prevention portion 7, and protrusions are formed on both side edges of the contact mounting portion 3 and the connecting portion 4 with the first bent portion 12 interposed therebetween. Articles 17a and 17b are formed respectively. When the hot compression tube 21 placed on the mounting part 5 is overheated and compressed, even if the hot melt 22 applied to the inner surface of the thermal compression tube 21 melts and flows out of the mounting part 5, the outflow prevention part 7 prevents the contact mounting portion 3 from flowing out.
[Selection] Figure 4

Description

  The present invention relates to a crimp terminal used when connecting a wiring material of an electrical component to an electrical connection object, and more particularly to a crimp terminal covered with a heat-shrinkable tube containing hot melt.

  Conventionally, for example, a crimp terminal that is fastened to a vehicle body, a battery, or the like via a fixing means such as a bolt or a nut is connected to an electrical component by a crimping portion that is formed on a mounting portion of the crimp terminal. The wiring material is fixed by crimping. And in order to provide the waterproof property in the core part of the wiring material mounted in the mounting part, the heat contraction tube which arranged hot melt inside is used. By heat shrinking the heat shrinkable tube covering the crimped portion including the core wire portion of the wiring material, the core wire portion of the wiring material can be sealed in a liquid-tight state.

  However, when the hot melt melted by the heat applied to coat the heat-shrinkable tube flows out from the crimped part and reaches the contact mounting part of the crimp terminal connected to the electrical connection object, There was a problem that it adhered and solidified.

  The hot melt placed in the heat-shrinkable tube maintains a high viscosity that does not easily flow out of the heat-shrinkable tube at room temperature, and is heated to a temperature necessary to heat-shrink the heat-shrinkable tube. It has the property of being melted and easily reduced in fluidity and fluidized, and solidified when the temperature is lowered to some extent from the melted state.

  By the way, for example, when a crimp terminal is used as a ground terminal, a vehicle body or the like is used as an electrical connection object. In the following, description will be continued by taking as an example a case where the crimp terminal is used as a ground terminal and the connection object is a vehicle body.

  When the melted hot melt adheres to the contact surface side of the contact mounting portion with the bolt or nut and hardens, a gap due to the solid hot melt is formed between the bolt or nut and the contact mounting portion. Become. Then, the crimp terminal is fixed to the body while the solid hot melt is attached to the crimp terminal. In addition, when the molten hot melt adheres to the contact surface with the body in the contact mounting portion and hardens, the crimped terminal is partially lifted by the solidified hot melt and fixed to the body. Become.

  If the crimp terminal is attached to the body with bolts or nuts while the hot melt is adhered and hardened in this way, the crimp terminal will not be tightened with the normal tightening force, and the tightening will be weaker than the normal tightening force. It will be tightened by force. That is, it is difficult to fix the contact mounting portion in close contact with the body, and the crimp terminal is fixed to the body in an incomplete contact state.

  And, if the crimp terminal is attached to the body in an incomplete contact state, the contact area between the vehicle body and the contact attachment portion is reduced, and the contact resistance is increased to deteriorate the electrical characteristics as the ground. become. Further, if the gap is further increased due to the influence of vibration or the like received from the vehicle, it may cause a contact failure between the crimp terminal and the body.

  For example, when the gap is enlarged due to the influence of vibrations from the vehicle, rainwater or the like easily adheres to the gap, and corrosion occurs in the gap. Further, the crimp terminal can freely move between the enlarged gaps. In general, since the wiring material is fixed to the body frame or the like, one end side of the crimp terminal is supported by the wiring material fixed to the body frame or the like, and the other end side is within the gap due to vibration from the vehicle or the like. It will be in the state to move freely. For this reason, when the contact mounting portion starts to move in the enlarged gap, a force for bending the crimp terminal is repeatedly applied to the crimp terminal.

  In particular, since the crimp terminal has a caulking portion, it is generally configured using a relatively soft metal material. In this way, since the crimp terminal has a structure that is weak against bending stress repeatedly applied, in the worst case, the crimp terminal is broken halfway, and can function as a ground terminal. It will disappear.

  In addition, when the crimp terminal is connected to an electrical component that carries a large amount of power, if the grounding state is lost due to such a contact failure or the crimping terminal is broken, the grounding is not performed. There is a problem that a fire occurs from an electrical component or a malfunction occurs in the electrical component or a device controlled by the electrical component. Furthermore, in a work vehicle, the influence of vibration is particularly large, and since it is used in an environment where adverse effects are likely to occur, if the contact state between the crimp terminal and the body is fixed in an insufficient state, Contact failure between the crimp terminal and the body frequently occurs.

  In order to prevent the molten hot melt from adhering to the contact mounting portion, an inflow hole through which the molten hot melt flows is provided between the contact mounting portion and the caulking portion so that the molten hot melt reaches the contact mounting portion. A terminal fitting (for example, refer to Patent Document 1) that is prevented from flowing out, an inflow restricting recess and an inflow restricting weir are provided between the contact mounting portion and the caulking portion, and the molten hot melt is placed in the inflow restricting recess. A grounding terminal fitting (for example, refer to Patent Document 2) and the like that are stored in the housing have been proposed.

The terminal fitting described in Patent Document 1 is a conventional example 1 of the present invention, and FIG. 7 is a perspective view thereof. Although the terminal metal fitting 40 described in patent document 1 is comprised as a pair of combination terminal metal fittings used combining a mutual contact attachment part, in FIG. 7, one of a pair of combination terminal metal fittings is shown. Only terminal fittings are shown. FIG. 8 shows a cross-sectional view when the heat shrinkable tube 46 covering the crimped portion 43 is heated and shrunk.
In addition, a pair of combination terminal metal fittings differ only in the shape of the contact attachment part combined with each other, and it has the same structure about another part.

  As shown in FIG. 7, an inflow hole 44 through which molten hot melt flows is provided between the substrate portion 41 and the contact mounting portion 42 in which the crimping portion 43 (core wire crimping portion 43 a) of the terminal fitting 40 is formed. It has been. The diameter of the inflow hole 44 is formed as a diameter of about 2 mm with respect to the substrate portion 41 having a width of about 5 mm.

  On both sides of the inflow hole 44, a pair of guide walls 45 that are continuous with the substrate portion 41 are respectively formed. Each guide wall 45 is configured to be inclined toward the inflow hole 44 on both sides of the inflow hole 44, and the pair of guide walls 45 plays a role of guiding the molten hot melt 47 to the inflow hole 44. .

  When the heat-shrinkable tube 46 shown in FIG. 8 covering the crimped portion 43 is heated and shrunk using the terminal fitting 40 having such a configuration, the hot melt 47 disposed inside the heat-shrinkable tube 46 is melted. The caulking portion 43 can be waterproofly sealed. At this time, even if the melted hot melt 47 flows out to the contact attachment portion 42 side, the molten hot melt 47 flows into the inflow hole 44, and therefore it is prevented from adhering to the contact attachment portion 42. .

  The ground terminal fitting described in Patent Document 2 is shown as Conventional Example 2 of the present invention, and FIG. 9 shows a cross-sectional view when the heat shrinkable tube covering the crimped portion is heated and thermally contracted. Similarly to the terminal metal fitting of Patent Document 1, the ground terminal metal fitting 50 described in Patent Document 2 is different only in the shape of the contact mounting portion, and a pair of combination terminal metal fittings that can combine the contact mounting portions. It is configured as. Therefore, also in FIG. 9, only one grounding terminal fitting 50 is shown.

  As shown in FIG. 9, the wire placement portion 52 of the grounding terminal fitting 50 is integrally formed so as to extend rearward from the rear edge of the terminal body 51, and the core wire caulking on the side close to the terminal body 51 A portion 53a and a wire crimping portion 53b far from the terminal body 51. A portion covered with the resin coating 54a of the end of the grounding electric wire 54 is crimped to the electric wire crimping portion 53b, and the core wire is exposed by peeling the resin coating 54a of the electric wire 54 to the core wire crimping portion 53a. 54b is crimped.

  The wire placement portion 52, the crimping portion 53 of the wire 54 at the wire placement portion 52, and the extension portion of the wire 54 from the wire placement portion 52 are covered with the heat shrinkable tube 57 and the hot melt 58. It can become a state. The heat shrinkable tube 57 is preliminarily fitted onto the electric wire 54 before being crimped, and the hot melt 58 is applied to the inner periphery of the heat shrinkable tube 57.

  An inflow regulating weir 55 extending in the left-right direction over the entire width is formed in a band-like region connected to the terminal body 51 in the electric wire placing portion 52 by bending a part thereof. Further, the region on the electric wire placement portion 52 side of the inflow restriction weir 55 is formed as an inflow restriction concave portion 56 that is lower than the electric wire placement portion 52.

  The portion of the wire 54 covered with the resin coating 54a and the core wire 54b exposed by peeling off the resin coating 54a are crimped by the core wire crimping portion 53a and the wire crimping portion 53b, respectively, and fixed to the wire placement portion 52. Can be made. In a state where the core wire 54b and the electric wire 54 are crimped by the crimping portion 53, the heat-shrinkable tube 57 that has been externally fitted in advance to the electric wire 54 is slid along the electric wire 54, and the electric wire placement portion 52 and the electric wire 54 The extension part from the mounting part 52 can be positioned so as to surround it.

  From this state, when the heat-shrinkable tube 57 is heated by heating means such as an electric heater, the heat-shrinkable tube 57 heat-shrinks, and the wire placement portion 52, the crimping portion of the wire 54 to the wire placement portion 52, and the wire The extension part from 54 electric wire mounting parts 52 is tightened. At the same time, the hot melt 58 that is in a molten state due to the heat applied to heat shrink the heat shrinkable tube 57 is brought into close contact with the wire placement portion 52, the core wire 54b, and the resin coating 54a by the shrinkage force of the heat shrinkable tube 57. To do.

At this time, even if the hot melt 58 heated and melted flows out excessively toward the terminal body 51, the hot melt 58 that has flowed out is stored in the inflow restricting recess 56, It is said that it will be prevented from reaching. Moreover, even if the amount of hot melt 58 that has flowed out increases as it overflows from the inflow restricting recess 56, the inflow to the terminal body 51 can be reliably restricted by the inflow restricting weir 55.
JP 2000-182688 A Japanese Patent Laid-Open No. 10-289745

  In the terminal metal fitting described in Patent Document 1, it is also an object to solve the following problems in the conventional terminal metal fitting. In other words, when recycling the vehicle body with conventional terminal fittings, the electric wires can be removed from the vehicle body by removing the bolts secured to the body and releasing the fastening between the contact mounting portion and the body. There wasn't. For this reason, there is a problem that it takes time to remove the terminal fittings and the recyclability is lacking.

  In order to solve this problem, in the terminal fitting 40 of Patent Document 1, an inflow hole 44 is provided between the contact mounting portion 42 and the substrate portion 41, so that the gap between the contact mounting portion 42 and the substrate portion 41 is provided. The strength is reduced. That is, an inflow hole 44 occupying about 40% of the width in the width direction of the substrate portion 41 is formed.

  The contact mounting portion 42 fastened with bolts or nuts and the substrate portion 41 on which the crimped portion 43 is formed can be easily cut and separated with the inflow hole 44 as a boundary. As a result, the electric wire 48 can be removed from the vehicle body without turning the bolts and nuts.

  Therefore, in order to reduce the strength of the substrate portion 41 between the contact attachment portion 42 and the caulking portion 43, it is indispensable to configure the inflow hole 44. For this reason, if a load is repeatedly applied to the crimping terminal where the electric wire 48 is fixed to the body frame or the like due to vibrations from the vehicle, the crimping terminal receives a concentrated load around the inflow hole 44 with low strength. It becomes easy to break from the periphery of the inflow hole 44.

  In particular, when the terminal fitting 40 of Patent Document 1 is used as, for example, a ground terminal for a work vehicle or the like to which a large vibration is applied, the terminal fitting 40 is easily broken around the inflow hole 44 due to vibration. It cannot be used for a long time as a grounding terminal.

  In the grounding terminal metal fitting 50 described in Patent Document 2, the wire placement portion 52 is integrally formed so as to extend rearward from the rear edge of the terminal body 51. Moreover, as shown in FIG. 9, the back surfaces of the terminal body 51 and the inflow restricting recess 56 are configured to have substantially the same planar state. For this reason, when the melted hot melt 58 wraps around the back side of the inflow restricting recess 56 and hardens, the solidified hot melt 58 is attached to the back side of the terminal body 51. The side is lifted from the body.

  If the grounding terminal fitting 50 is fixed to the body with bolts or nuts in this state, the grounding terminal fitting 50 is fixed to the body in an incompletely adhered state. And, by receiving vibration from a vehicle or the like, the incomplete fixed state is further deteriorated. As described above, contact failure occurs between the grounding terminal fitting 50 and the body, and the reliability as the grounding terminal fitting is lacking.

  The present invention aims to solve the problems in the conventional crimp terminal generated by the molten hot melt as described above, and prevents the molten hot melt from adhering to the contact mounting portion. It is also possible to provide a crimp terminal that can increase the strength as a crimp terminal and can firmly fix the contact mounting portion to an electrical connection object in a completely fixed state at all times. .

The object of the present invention can be achieved by the inventions described in claims 1 to 4.
That is, in the present invention, a contact attachment portion that is attached to an electrical connection object via a fixing means, a placement portion that places and fixes a wiring material of an electrical component, the contact attachment portion, and the placement portion described above A connecting portion that connects between the two, and a caulking portion that is formed in the mounting portion and that fixes a terminal of the wiring material placed on the mounting portion, and the wiring member by the caulking portion After crimping, the placement part is a crimp terminal covered with a heat-shrinkable tube with hot melt inside,
The contact mounting portion, the connecting portion, and the placement portion described above are configured as portions of a plate-like body bent in a crank shape in a side view, and a core wire locking portion that regulates a core wire tip position of the wiring member; The most important feature is that the outflow prevention portions that prevent the molten hot melt from flowing out to the contact mounting portions are formed in the above-mentioned placement portions in a protruding shape.

In the present invention, the main feature is that the configuration of the bent portion and the configuration of the outflow prevention portion in the plate-like body bent in the crank shape as viewed from the side are specified.
Furthermore, the main feature of the present invention is that the configuration of both side edge portions of the contact mounting portion and the connecting portion in the portion sandwiching the bent portion connecting the contact mounting portion and the connecting portion is specified.

  In the present invention, hot melt that melts and flows out when the heat-shrinkable tube covering the crimp terminal is heated and contracted can be prevented from flowing out to the contact mounting portion by the outflow prevention portion formed as a protrusion shape. . In particular, since the outflow prevention part is made of a material that is easier to cool than hot melt, the hot melt is cooled from the part in contact with the outflow prevention part. Melt outflow can be suppressed.

  In this way, it is possible to prevent the hot melt melted up to the contact mounting portion from flowing out and adhere to the contact mounting portion. Therefore, it is possible to reliably fix the contact mounting portion to the electrical connection object in a completely close contact state at all times.

  In addition, the outflow prevention part is a positioning member for sliding the heat-shrinkable tube previously fitted on the wiring material along the wiring material so as to surround the mounting part and the tip of the wiring material or It can also be used as a positioning mark. In addition, since the core wire tip position of the wiring material can be positioned by the core wire locking portion, when covering the heat shrinkable tube, the relationship between the tip position of the heat shrinkable tube and the core wire tip position of the wiring material is always constant. The positional relationship can be kept.

  For this reason, when a plurality of crimp terminals are each covered with a heat-shrinkable tube, the relationship between the tip position of the heat-shrinkable tube and the core wire tip position of the wiring member can be regulated so as to always have a fixed positional relationship. . Even if the molten hot melt flows out from the tip of the heat shrinkable tube, the amount of outflow flowing out from the tip of the heat shrinkable tube is always substantially constant regardless of which crimping terminal covers the heat shrinkable tube. It can be suppressed to.

  Moreover, most of the hot melt that has flowed out is prevented from flowing further by the flow-out prevention unit. Furthermore, by suppressing the outflow of hot melt by the outflow prevention part, it becomes possible to forcibly fill the hot melt between the outflow prevention part and the core wire tip, and the hot melt is filled in the core wire tip side. It is possible to prevent generation of bubbles that are not made.

  In addition, even if there is a certain amount of hot melt that has flowed out beyond the outflow prevention part, the hot melt will be cooled on the connecting part having a desired length, and it will surely flow out to the contact mounting part. Can be prevented.

  In addition, even if the hot melt that has been cooled and solidified on the connecting part adheres to both the front and back surfaces of the connecting part and is solidified, the connecting part is disposed inclined with respect to the contact mounting part. The hot melt solidified on the part does not become an obstacle to fixing the contact mounting part to the electrical connection object.

  In addition, since the crimp terminal is composed of a plate-like body bent in a crank shape when viewed from the side, a step can be provided between the mounting portion and the contact mounting portion, and arranged in different positional relationships in the vertical direction. can do. And the convenience of attachment can be exhibited also when fixing a crimp terminal to an electrical connection object by adjusting the length of a connection part.

  Furthermore, the wiring material and the contact mounting portion after the mounting can be arranged in a state shifted in the vertical direction, and the arrangement relationship between the mounting portion and the wiring material can be arranged in a substantially linear shape. With this arrangement configuration, the arrangement relationship between the wiring material and the mounting portion, in particular, the wiring material and the caulking portion is improved, and even if vibration or the like is applied, the caulking between the wiring material and the caulking portion is performed. The state will not be lost.

  Furthermore, since the connecting portion can have a sufficient length to cool and solidify the hot melt flowing out from the contact mounting portion, the molten hot melt flows out to the contact mounting portion. It can be surely prevented.

  In addition, since the wiring member is crimped by bending the crimp portion, the crimp terminal is generally configured using a relatively soft metal material. In the present invention, in a plate-like body bent in a crank shape in a side view, a convex protrusion is formed at the concave bent portion, and a concave dimple is formed at the convex bent portion. Therefore, the strength at the bent portion can be greatly improved.

  Moreover, the flow of the molten hot melt can be inhibited by the concave dimples and the convex protrusions formed in the bent portion, and the solidification of the molten hot melt can be accelerated. In addition, when sliding a heat-shrinkable tube that has been previously fitted to the wiring material using the concave dimple formed in the bent portion between the connecting portion and the mounting portion, It can also be used as a positioning member that regulates the tip of the shrinkable tube.

  Furthermore, the concave dimples formed at the bent portions, the convex protrusions, and the outflow prevention portions can be easily formed by press working or the like. For this reason, the manufacturing process of the crimp terminal of the present invention can be simplified, and the manufacturing cost can be reduced.

  In the present invention, in order to improve the strength of the connecting portion, the side edge portions of the both sides of the contact mounting portion and the connecting portion are provided on both side edges of the bent portion connecting the contact mounting portion and the connecting portion. Ridges and standing ribs can be formed. Thereby, even if a crimp terminal is configured using a relatively soft metal material and a step is formed between the contact mounting portion and the mounting portion by the connecting portion, the strength of the connecting portion is increased by the protrusions and ribs. Can be raised.

  In addition, the surface strength of the contact mounting portion can be increased by the protrusions and ribs formed on the periphery around the bent portion side of the contact mounting portion. In particular, it is possible to increase the strength with concave dimples formed on the bent part, convex protrusions, protrusions and ribs formed on both side edges of the contact mounting part and the connecting part, so the crimp terminal is configured. It is also possible to reduce the plate thickness.

When forming protrusions along the respective side edges on both side edges of the contact mounting part and the connecting part, concave dimples formed on the bent parts, convex protrusions and outflow prevention parts, The protrusions can be formed at the same time by pressing performed when forming the core wire locking portion.
In addition, when forming ribs erected along the side edges of the both side edges of the contact mounting portion and the connecting portion, the both side edges of the contact mounting portion and the connecting portion should be bent. Alternatively, the ribs can be formed by welding, bonding, or the like.

  According to the present invention, not only the outer peripheral surface of the core wire of the wiring member but also the front end surface of the core wire can be completely covered with hot melt without generating bubbles, so that the waterproof treatment for the wiring member can be reliably performed. In addition, the strength required as a crimp terminal can be provided. Moreover, it can prevent reliably that the hot melt which flowed out from the front-end | tip of a heat contraction tube flows out to a contact attachment part by an outflow prevention part or a connection part.

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. As the configuration of the crimp terminal of the present invention, in addition to the shape and arrangement configuration described below, if the shape and arrangement configuration can solve the problems of the present invention, those shapes and arrangement configurations can be adopted. It can be done. For this reason, this invention is not limited to the Example demonstrated below, A various change is possible.

  FIG. 1 shows a perspective view of a crimp terminal according to an embodiment of the present invention, and FIG. 2 shows a plan view of the crimp terminal. FIG. 3 shows a cross-sectional view of the heat-shrinkable tube and a side view of the crimp terminal when the heat-shrinkable tube is slid so as to cover the distal end portion of the wiring member. FIG. 4 is a perspective view showing a state before crimping the core wire and the covering portion of the wiring member at the caulking portion. FIG. 5 is a sectional view showing a state before fastening with a bolt. In addition, the figure concerning an Example is shown in the exaggerated state in order to clarify the structure of a member.

  The configuration of the crimp terminal 1 will be described with reference to FIGS. As shown in FIGS. 1 and 3, the crimp terminal 1 has a plate-like body bent into a crank shape in a side view, and the contact attachment portion 3, the connection portion 4, and the placement portion 5 are formed by the bent portions. It is composed. The contact mounting portion 3 is a portion that is fastened to an object to be electrically connected by a fixing means such as a bolt or a nut, and has a screw hole 11 through which a bolt or the like is inserted in the center and an electrical connection in the peripheral portion. An anti-rotation piece 20 that restricts the position where the crimp terminal 1 is attached to the object is formed.

  As shown in FIG. 5, the non-rotating piece 20 is engaged with an engagement hole 27 or the like formed in the electrical connection object 25, so that the crimp terminal 1 is attached to the electrical connection object 25. It can also be used to serve as a detent for the crimp terminal 1. In FIG. 5, the bolt 26 that has passed through the screw hole 11 of the crimp terminal 1 is screwed into a bolt hole 28 formed in the object 25 for electrical connection, so that the crimp terminal 1 is connected to the object 25 for electrical connection. Can be fixed.

  As shown in FIGS. 1 to 4, the placement unit 5 is a part on which a terminal of the wiring material 2 connected to an electrical component (not shown) is placed, and the core wire 2 a of the placed wiring material 2 is crimped. Thus, the core wire crimping portion 9 to be fixed and the wiring material crimping portion 10 to fix the coating portion of the wiring material 2 by crimping are formed. Further, in addition to forming the mounting portion 5 in a planar shape as shown in the drawing, it may be formed so that the cross-sectional shape is concave in accordance with the outer peripheral shape of the wiring material 2 to be mounted. it can.

  A connecting portion 4 is formed between the contact mounting portion 3 and the placement portion 5 to connect them. The connecting portion 4 is formed integrally with the contact mounting portion 3 via the concave first bent portion 12 and is formed integrally with the mounting portion 5 via the convex second bent portion 13. ing.

  The concave first bent portion 12 is formed with at least one protruding portion 14 protruding in the width direction on the front surface side, and the convex second bent portion 13 has dimples 15 protruding on the back surface side. However, at least one is formed in the width direction. By forming the protrusion 14 and the dimple 15, the bending strength at the first bent portion 12 and the second bent portion 13 can be increased.

  Between the second bent portion 13 and the core wire crimping portion 9 in the mounting portion 5, a core wire locking portion 6 and an outflow prevention portion 7 projecting to the surface side are formed. The outflow prevention part 7 is formed as a wider structure in the width direction of the placement part 5 than the core wire locking part 6. The outflow prevention part 7 can be configured as a continuous protrusion shape as in the illustrated example, or it can be configured as a shape in which a plurality of protrusions are spaced apart and protruded along the width direction of the placement part 5.

  Further, on both side edges of the contact mounting part 3 and the connecting part 4 with the first bent part 12 interposed therebetween, protrusions 17a and 17b are formed along the respective side edges. The thus configured crimp terminal 1 has a configuration in which a plate-like body is formed by press working or the like. A configuration in which the crimp terminal 11 is formed into a crank shape in a side view, and a screw hole 11, a caulking portion 8, a projection portion 14, a dimple 15, a core wire locking portion 6, an outflow prevention portion 7, and respective projection strips 17a and 17b are respectively formed. The structure to perform can be shape | molded by performing press work etc. in multiple times.

  The protrusions 17a and 17b formed on both side edges of the contact mounting part 3 and the connecting part 4 can be formed by extrusion molding without pressing, or both side edges of the contact mounting part 3 and the connecting part 4 Each part can also be formed by bending. Further, the anti-rotation piece 20 can be formed on the same surface as the contact attachment portion 3 when the contact attachment portion 3 is formed, and then the anti-rotation piece 20 can be formed by processing such as bending.

  Further, in place of the protrusion 17a formed around a part of the contact attachment portion 3 on the first bent portion 12 side and the protrusion 17b formed on both side edges of the connecting portion 4, as shown in FIG. It is also possible to form a rib 18a formed by bending a part of 3 and a rib 18b formed by bending both side edges of the connecting portion 4. The ribs 18a and ribs 18b can be formed by welding, bonding or the like instead of being formed by bending. In FIG. 6, the same reference numerals are used for the same constituent members as shown in FIG. 1.

  By forming the protrusion 17a and the rib 18a around a part of the contact attachment portion 3 on the first bent portion 12 side, the surface strength of the contact attachment portion can be increased. For this reason, when fixing the contact mounting part 3 to the electrical connection object through the fixing means, it is always stable and strong without causing an unexpected situation that the contact mounting part 3 is twisted. Can be fixed.

Next, a method for pressure-bonding the wiring member 2 to the placement portion 5 and a method for covering the heat-shrinkable tube 21 coated with the hot melt 22 inside will be described with reference to FIGS. First, the heat-shrinkable tube 21 is inserted in advance in a loosely fitted state into the wiring member 2 from which the covering portion on the distal end side is peeled to expose the core wire 2a. Next, the exposed end portion of the core wire 2 a is brought into contact with the core wire locking portion 6 to position the wiring member 2 placed on the placement portion 5.
The core wire crimping portion 9 and the wiring material crimping portion 10 are crimped, and the core wire 2a and the wiring material 2 are crimped to the placement portion 5. In this state, the core wire 2a is still exposed.

  Next, the heat-shrinkable tube 21 is slid along the wiring member 2, and the mounting portion in the dimple 15 formed at the outflow preventing portion 7 or the second bent portion 13 with the tip of the heat-shrinkable tube 21 as shown in FIG. The tip of the heat-shrinkable tube 21 is positioned in contact with the parts protruding to the back surface side of 5 or using these parts as marks. At this time, the heat-shrinkable tube 21 protrudes closer to the contact mounting portion 3 than the tip of the core wire 2a in the wiring member 2, and surrounds the placement portion 5 so as to cover the tip of the core wire 2a. In this state, the heat shrinkable tube 21 is heated using heating means such as an electric heater.

  Then, as shown in FIG. 5, the heat-shrinkable tube 21 performs heat-shrinking and tightens the tip end portion of the wiring member 2 together with the placement portion 5. The melted hot melt 22 is brought into close contact with the caulking portion 8 and the rear end portion of the placement portion 5 from the portion ahead of the end of the core wire 2a by the contraction force of the heat shrinkable tube 21. Moreover, since the hot melt 22 melted by heating is fluidized with a reduced viscosity, it can be filled evenly without leaving large gaps between the above-mentioned members, and the above-mentioned members are in a liquid-tight state. Can be brought into close contact with.

  A part of the melted hot melt 22 flows out from the front end of the heat shrinkable tube 21 toward the contact mounting portion 3, but the outflow of the hot melt 22 that has flowed out is inhibited by the outflow prevention unit 7. Therefore, not only the outer peripheral surface of the core wire 2a but also the hot melt 22 can be filled without forming a gap between the outflow prevention portion 7 and the front end surface of the core wire 2a.

  Further, the hot melt 22 flowing out beyond the outflow prevention part 7 is prevented from flowing out by the dimples 15 formed in the second bent part 13. Even if there is a hot melt 22 that further flows out beyond the dimple 15, the outflow amount is extremely small, and the solidified portion is cooled and solidified at the connecting portion 4 without reaching the contact mounting portion 3 beyond the connecting portion 4. It will be.

  As described above, by using the crimp terminal 1 according to the present invention, the core wire 2a of the wiring material 2 placed and fixed on the placement portion 5 and the caulking portion 8 for crimping the wiring material 2 are not exposed to the outside. The heat shrinkable tube 21 and the hot melt 22 can be covered from the outside, and can be sealed in a liquid-tight state.

  The hot melt 22 flowing out from the tip of the heat shrinkable tube 21 can surely be prevented from flowing out to the contact mounting portion 3 by the outflow preventing portion 7, the dimple 15, and the connecting portion 4. Therefore, the contact attachment portion 3 is fixed to the object of electrical connection in a state where the hot melt 22 is not always attached. Therefore, since the attachment strength of the contact attachment portion 3 can be fixed at a desired attachment strength, it is possible to reliably prevent the occurrence of contact failure caused by the hot melt 22 adhering to the contact attachment portion 3.

  In the above description of the embodiment, the explanation has been given by taking the grounding crimp terminal as an example, but the present invention is not limited to the grounding crimp terminal. The present invention can be suitably applied to, for example, a crimp terminal for connection to a power source as long as it is a crimp terminal used when connecting a wiring material of an electrical component to an electrical connection object.

  The present invention can apply the technical idea of the present invention to an apparatus or the like to which the technical idea of the present invention can be applied.

It is a perspective view of a crimp terminal. (Example) It is a top view of a crimp terminal. (Example) It is sectional drawing of the crimp terminal which coat | covered the heat-shrinkable tube. (Example) It is a perspective view of the crimp terminal which loosely fitted the heat contraction tube. (Example) It is sectional drawing which shows the state which attaches a crimp terminal to the target object of electrical connection. (Example) It is a perspective view which shows the modification of a crimp terminal. (Example) It is a perspective view of a terminal metal fitting. (Conventional example 1) It is sectional drawing of a terminal metal fitting. (Conventional example 1) It is sectional drawing of the terminal metal fitting for earth | grounds. (Conventional example 2)

Explanation of symbols

1 ... Crimp terminal,
3 ... contact mounting part,
4 ... connection part,
5: Placement part,
6 ... Core wire locking part,
7 ... Outflow prevention part,
12 ... 1st bending part,
13 ... 2nd bending part,
14 ... protrusions,
15 ... dimples,
17a, 17b ... protrusions,
18a, 18b ... ribs,
21 ... heat shrinkable tube,
22 ... hot melt,
40: Terminal fitting,
41 ... substrate part,
42 ... contact mounting part,
43 ... caulking part,
44 ... inflow hole,
45 ... guide wall,
46 ... heat shrinkable tube,
47 ... hot melt,
50: Terminal fitting for grounding,
51 ... Terminal body,
52 ... Electric wire placement section,
53 ... caulking part,
55 ... Inflow control weir,
56 ... inflow restricting recess,
57 ... heat shrinkable tube,
58: Hot melt.

Claims (4)

A contact attachment portion that is attached to an electrical connection object via a fixing means, a placement portion that places and fixes a wiring material of an electrical component, and a connection between the contact attachment portion and the placement portion described above. A connecting portion that is formed, and a crimping portion that is formed on the placement portion and that fixes the terminal of the wiring member placed on the placement portion,
After the crimping of the wiring material by the caulking portion, the placement portion is a crimp terminal covered with a heat shrinkable tube having hot melt disposed therein,
The contact mounting portion, the connecting portion, and the mounting portion are configured as portions of a plate-like body bent into a crank shape in a side view,
A core wire locking portion that regulates the position of the core wire tip of the wiring member and an outflow prevention portion that prevents the molten hot melt from flowing out to the contact mounting portion are formed in a protruding shape on the mounting portion, respectively. Crimp terminal characterized by being made. In the plate-like body bent into the crank shape in the side view, a convex protrusion is formed in the concave bent portion, and a concave dimple is formed in the convex bent portion,
The said outflow prevention part is formed in the width direction of the said mounting part between the bending part which connects the said connection part and the said mounting part, and the said core wire latching | locking part. The crimp terminal according to 1.   Protruding strips along the respective side edges are formed on both side edges of the contact mounting part and the connecting part across the bent part connecting the contact mounting part and the connecting part. The crimp terminal according to claim 1 or 2.   Ribs erected along the respective side edge portions are formed on both side edge portions of the contact mounting portion and the connecting portion across a bent portion connecting the contact mounting portion and the connecting portion. The crimp terminal according to claim 1 or 2, wherein

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