Terminal and wire connection structure

Abstract

To make it easier to manage a gap.SOLUTION: A connection structure 10 of a terminal and an electric wire of the present disclosure includes a first electric wire 11, a second electric wire 12, and a terminal 20 for connecting the first electric wire 11 and the second electric wire 12 to each other. The first electric wire 11 has a first core wire 11A and a first insulation coating 11B surrounding the first core wire 11A. The second electric wire 12 has a second core wire 12A and a second insulation coating 12B surrounding the second core wire 12A. The terminal 20 includes: a first connection unit 21 connected to the first core wire 11A; a second connection unit 22 connected to the second core wire 12A; and a connection unit 23 for connecting the first connection unit 21 and the second connection unit 22 to each other. The first connection unit 21 is a single component in which a first reception unit 21A for receiving the first core wire 11A and a first contact pressure provision unit 21B for providing the first core wire 11A with a predetermined contact pressure by pressing the first core wire 11A between the first contact pressure provision unit and the first reception unit 21A are integrated with each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a connection structure between a terminal and an electric wire. [Background technology]

[0002] A known example of a connection structure for connecting coated electric wires in which a conductor is surrounded by an insulating coating is the connection device described in JP 2020-187997 A (Patent Document 1 below). This connection device has a pressing member, a movable conductive member, and a fixed conductive member. The pressing member is made of an electrically insulating rubber material and is capable of elastic deformation.

[0003] The movable conductive member is made of a metal plate, such as copper or aluminum, and is elongated in the front-to-rear direction as a whole. The movable conductive member is fixed to the pressing member by being fitted into a recessed accommodating portion on the upper surface of the pressing member. The movable conductive member is a single component having a first contact portion, a second contact portion, and a connecting portion that connects the first and second contact portions.

[0004] The fixed-side conductive member is made of a metal plate such as copper or aluminum, and is a single component integrally formed with an attachment portion, a first contact portion, an attachment portion, a second contact portion, and another attachment portion, arranged in this order. The fixed-side conductive member is fixed to and attached to the ceiling surface of a connection portion formed in a housing made of a synthetic resin material. Meanwhile, the pressing member is placed on the bottom surface of the connection portion.

[0005] The fixed-side conductive member is positioned above the pressing member and the movable-side conductive member and faces the movable-side conductive member in the vertical direction with a predetermined gap therebetween. The first and second contact portions protrude toward the movable-side conductive member. The vertical gap between the lower ends of the first and second contact portions and the upper surface of the movable-side conductive member when the pressing member is not elastically deformed is set to be smaller than the outer diameter of the conductor.

[0006] The conductor is connected to the first contact portion and the first contact point by inserting the connection end of the conductor into the connection portion and being sandwiched between the first contact portion and the first contact point. When the pressing member is not elastically deformed, the distance between the first contact portion and the first contact point is smaller than the outer diameter of the connection end, so the connection end displaces the first contact portion downward and elastically deforms the pressing member by squeezing it up and down. The elastic restoring force of the pressing member electrically connects the conductor to the first contact portion with a predetermined contact pressure, and electrically connects the conductor to the first contact point with a predetermined contact pressure. The conductor is connected to the second contact portion and the second contact point in a similar manner. This electrically connects the pair of conductors via the connecting device. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2020-187997 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the above-mentioned connection device, the movable side conductive member and the fixed side conductive member are not composed of a single part, and the tolerances of each part must be taken into consideration, so it was not easy to manage the gap (the vertical distance between the lower ends of the first contact portion and the second contact portion and the upper surface of the movable side conductive member when the pressing member is not elastically deformed). [Means for solving the problem]

[0009] The connection structure between a terminal and an electric wire of the present disclosure is a connection structure between a terminal and an electric wire comprising a first electric wire, a second electric wire, and a terminal connecting the first electric wire and the second electric wire, wherein the first electric wire has a first core wire and a first insulating coating surrounding the first core wire, and the second electric wire has a second core wire and a second insulating coating surrounding the second core wire, the terminal has a first connection portion connected to the first core wire, a second connection portion connected to the second core wire, and a connecting portion connecting the first connection portion and the second connection portion, and the first connection portion is a single component integrally formed with a first receiving portion that receives the first core wire and a first contact pressure applying portion that applies a predetermined contact pressure to the first core wire by pressing the first core wire between the first receiving portion and the first core wire. [Effects of the Invention]

[0010] According to the present disclosure, gap management can be facilitated. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is an exploded perspective view showing a connection structure between a terminal, a first electric wire, and a second electric wire according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing a connection structure between the terminal of the first embodiment and the first and second electric wires. [Figure 3] FIG. 3 is a cross-sectional view showing a connection structure between the terminal and the first electric wire according to the first embodiment. [Figure 4] FIG. 4 is a perspective view showing a state in which a plurality of terminals according to the first embodiment are inserted into the rubber plug from the front and rear directions. [Figure 5] FIG. 5 is a perspective view showing how a plurality of terminals of the first embodiment connected by a carrier are inserted into a rubber plug from above. [Figure 6] FIG. 6 is an exploded perspective view showing a connection structure between a terminal and a first electric wire and a second electric wire according to the second embodiment. [Figure 7] FIG. 7 is a perspective view showing a connection structure between a terminal of the second embodiment and a first electric wire and a second electric wire. [Figure 8]FIG. 8 is a cross-sectional view showing a connection structure between a terminal and a first electric wire according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. (1) The connection structure between a terminal and an electric wire of the present disclosure is a connection structure between a terminal and an electric wire including a first electric wire, a second electric wire, and a terminal connecting the first electric wire and the second electric wire, wherein the first electric wire has a first core wire and a first insulating coating surrounding the first core wire, and the second electric wire has a second core wire and a second insulating coating surrounding the second core wire, the terminal has a first connection portion connected to the first core wire, a second connection portion connected to the second core wire, and a connecting portion connecting the first connection portion and the second connection portion, and the first connection portion is a single component integrally formed with a first receiving portion that receives the first core wire and a first contact pressure applying portion that applies a predetermined contact pressure to the first core wire by pressing the first core wire between the first receiving portion and the first core wire.

[0013] According to the above connection structure, the first receiving portion and the first contact pressure applying portion that constitute the first connecting portion are integrally formed as a single component, which makes it easy to manage the gap (the dimension between the first receiving portion and the first contact pressure applying portion). The first core wire of the first electric wire is inserted between the first receiving portion and the first contact pressure applying portion and is pressed, thereby receiving a predetermined contact pressure, and therefore the first core wire and the first connecting portion are electrically connected.

[0014] (2) It is preferable that the first connecting portion, the connecting portion, and the second connecting portion are arranged side by side in the front-to-rear direction, the first receiving portion is flat and elongated in the front-to-rear direction, the first contact pressure applying portions are provided in pairs rising from both left and right side edges of the first receiving portion, the pair of first contact pressure applying portions are provided symmetrically with respect to an axis extending vertically through the left-to-right center of the first receiving portion, and the first connecting portion is formed so as to have a cylindrical shape when viewed from the front-to-rear direction by the first receiving portion and the pair of first contact pressure applying portions. Since the first connecting portion is formed in a cylindrical shape, it becomes easier to measure the gap from the front-rear direction, and it becomes even easier to manage the gap.

[0015] (3) It is preferable that the first receiving portion has a bead that protrudes toward the first core wire and extends in the front-to-rear direction, and the first contact pressure applying portion has a bead that protrudes toward the first core wire and extends in the front-to-rear direction. Since the first receiving portion contacts the first core wire via the bead and the first contact pressure applying portion contacts the first core wire via the bead, a high contact pressure can be applied to the first core wire without providing a spring such as an elastic contact piece within the first connection portion.

[0016] (4) It is preferable that the first connecting portion and the second connecting portion are a single component of the same shape, and that the first connecting portion, the linking portion, and the second connecting portion are integrally formed. This also makes it easy to control the gap of the second connection portion (the dimension between the second receiving portion and the second contact pressure applying portion). The second core wire of the second electric wire is inserted between the second receiving portion and the second contact pressure applying portion and pressed, so that the second core wire and the second connection portion are electrically connected to each other. The first connection portion, the linking portion, and the second connection portion are integrally formed, so that the first electric wire and the second electric wire are electrically connected to each other via the terminal.

[0017] [Details of the embodiments of the present disclosure] Specific examples of the connection structure between a terminal and an electric wire according to the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0018] <Embodiment 1> A first embodiment of the present disclosure will be described with reference to Figures 1 to 5. In the following description, the up-down direction shown in Figure 3 will be referred to as the up-down direction, the left-right direction shown in Figure 3 as the left-right direction, the length direction of the terminal 20 shown in Figures 1 and 2 as the front-rear direction, and the insertion direction of the first electric wire 11 and the second electric wire 12 into the terminal 20 as the front. Note that, for multiple identical components, only some of the components will be designated by reference numerals, and the reference numerals for the other components may be omitted.

[0019] 1, the connection structure 10 between a terminal and an electric wire of this embodiment includes a first electric wire 11, a second electric wire 12, and a terminal 20. The first electric wire 11 has a well-known configuration in which a first core wire 11A made of a conductive single-core wire or a thin metal wire is surrounded by a first insulating coating 11B. Similarly, the second electric wire 12 has a well-known configuration in which a second core wire 12A made of a conductive single-core wire or a thin metal wire is surrounded by a second insulating coating 12B.

[0020] The terminal 20 is a female terminal made of metal and has a cylindrical shape. The terminal 20 is formed into a predetermined shape by known methods such as pressing, cutting, and casting. The metal constituting the terminal 20 can be selected from copper, copper alloy, aluminum, aluminum alloy, stainless steel, and other metals as needed. A plating layer may be formed on the surface of the terminal 20. The metal constituting the plating layer can be selected from tin, nickel, silver, and other metals as needed.

[0021] Terminal 20 has a first connection portion 21 connected to first core wire 11A, a second connection portion 22 connected to second core wire 12A, and a linking portion 23 that links first connection portion 21 and second connection portion 22. First connection portion 21, linking portion 23, and second connection portion 22 are arranged side by side in this order in the front-to-rear direction. Hereinafter, the side of linking portion 23 as viewed from first connection portion 21 will be referred to as the front side, and the side of linking portion 23 as viewed from second connection portion 22 will be referred to as the front side.

[0022] The first connecting portion 21 and the second connecting portion 22 are a single component of the same shape, and the first connecting portion 21, the linking portion 23, and the second connecting portion 22 are integrally formed. In the following, only the configuration of the first connecting portion 21 will be described, and the description of the configuration of the second connecting portion 22 will be omitted, and the same alphabet as that of the first connecting portion 21 will be used in the alphabet portion of the reference numeral for the same configuration as the first connecting portion 21.

[0023] 3, the first connection portion 21 includes a first receiving portion 21A that receives the first core wire 11A, and a pair of first contact pressure applying portions 21B that rise from both left and right side edges of the first receiving portion 21A. The first receiving portion 21A and the pair of first contact pressure applying portions 21B are integrally formed. In other words, the first connection portion 21 is a single component in which the first receiving portion 21A and the pair of first contact pressure applying portions 21B are integrally formed.

[0024] 1 and 2, first receiving portion 21A is flat and elongated in the front-to-rear direction. First receiving portion 21A, the bottom wall of connecting portion 23, and second receiving portion 22A are flat and flush with each other. Any of first receiving portion 21A, the bottom wall of connecting portion 23, and second receiving portion 22A may be provided with a locking structure for a housing (not shown) that accommodates terminal 20, a rubber plug, or the like. The pair of first contact pressure applying portions 21B are provided symmetrically with respect to axis L that extends vertically through the center of first receiving portion 21A in the left-to-right direction.

[0025] The first receiving portion 21A has a bead 21C that protrudes upward and extends in the front-to-rear direction. The first contact pressure providing portion 21B on the left side of the figure in Fig. 3 (hereinafter abbreviated as "left first contact pressure providing portion 21B") has a bead 21D that protrudes downward and right and extends in the front-to-rear direction. Similarly, the first contact pressure providing portion 21B on the right side of the figure (hereinafter abbreviated as "right first contact pressure providing portion 21B") has a bead 21D that protrudes downward and left and extends in the front-to-rear direction.

[0026] The left first contact pressure applying portion 21B projects upward from the left edge of the first receiving portion 21A, and then extends in an arc in the clockwise direction just before the bead 21D. The right first contact pressure applying portion 21B projects upward from the right edge of the first receiving portion 21A, and then extends in an arc in the counterclockwise direction just before the bead 21D. When viewed from the front-to-rear direction, the first connecting portion 21 is formed into a cylindrical shape by the first receiving portion 21A and the pair of first joining portions 21B.

[0027] The tip of the left first contact pressure imparting portion 21B and the tip of the right first contact pressure imparting portion 21B are arranged opposite each other in the left-right direction with a gap S interposed therebetween. The gap S before the first core wire 11A is inserted into the first connecting portion 21 is set to be smaller than the gap S after the first core wire 11A is inserted into the first connecting portion 21. Therefore, when the first core wire 11A is inserted into the first connecting portion 21, the pair of contact pressure imparting portions 21B elastically expand and deform so as to move apart in the left-right direction, and the gap S becomes larger.

[0028] In the expanded and deformed state A pair of first contact pressure applying portions 21BThe elasticity of the beads 21C applies a predetermined contact pressure to the first core wire 11A. The first receiving portion 21A presses the first core wire 11A upward via the bead 21C, the left first contact pressure applying portion 21B presses the first core wire 11A downward and to the right via the bead 21D, and the right first contact pressure applying portion 21B presses the first core wire 11A downward and to the left via the bead 21D. In other words, the three beads 21C, 21D are arranged to surround the first core wire 11A and protrude toward the first core wire 11A, so that the first core wire 11A receives a predetermined contact pressure from the three beads 21C, 21D.

[0029] When the first core 11A of the first electric wire 11 is inserted into the first connection portion 21 from the rear, the first core 11A receives a predetermined contact pressure from the bead 21C of the first receiving portion 21A and the pair of beads 21D of the pair of first contact pressure applying portions 21B, thereby electrically connecting the first core 11A to the first connection portion 21. Similarly, when the second core 12A of the second electric wire 12 is inserted into the second connection portion 22 from the rear, the second core 12A receives a predetermined contact pressure from the bead 22C of the second receiving portion 22A and the pair of beads 22D of the pair of second contact pressure applying portions 22B, thereby electrically connecting the second core 12A to the second connection portion 22. This electrically connects the first electric wire 11 and the second electric wire 12 via the terminal 20.

[0030] 4, the terminal 20 may be accommodated in the accommodation hole 31 of the first rubber plug 30. In addition to the contact pressure due to the elasticity of the pair of first contact pressure applying portions 21B, the contact pressure due to the elasticity of the first rubber plug 30 is applied to the first core wire 11A, so that a higher contact pressure can be applied to the first core wire 11A.

[0031] In the case of FIG. 4 , when inserting the terminal 20 into the receiving hole 31 of the first rubber stopper 30, the corners of the terminal 20 may damage the first rubber stopper 30, potentially causing fragments of the first rubber stopper 30 to enter the terminal 20. To address this issue, a second rubber stopper 40 with slits 41 may be used, as shown in FIG. 5 . The second rubber stopper 40 has multiple receiving holes 42 arranged in two rows, one above the other, aligned laterally. The upper receiving hole 42 has a slit 41 formed in the upper part of the second rubber stopper 40, and the lower receiving hole 42 has a slit 41 formed in the lower part of the second rubber stopper 40. The multiple terminals 20 are connected by a carrier 13 to form a chain of terminals. When the terminals 20 are inserted into the second rubber stopper 40 from above, the terminals 20 are accommodated in their respective receiving holes 42 while pushing and widening their slits 41. This prevents the corners of the terminals 20 from damaging the second rubber stopper 40.

[0032] [Effects of the First Embodiment] The connection structure 10 of a terminal and an electric wire of the present disclosure includes a first electric wire 11, a second electric wire 12, and a terminal 20 that connects the first electric wire 11 and the second electric wire 12, in which the first electric wire 11 has a first core wire 11A and a first insulating coating 11B that surrounds the first core wire 11A, the second electric wire 12 has a second core wire 12A and a second insulating coating 12B that surrounds the second core wire 12A, and the terminal 20 connects the first core wire 11A and the second core wire 12A to the first core wire 11A. The terminal and electric wire connection structure 10 has a first connection portion 21 to be connected, a second connection portion 22 to be connected to the second core wire 12A, and a connecting portion 23 that connects the first connection portion 21 and the second connection portion 22, and the first connection portion 21 is a single component integrally formed with a first receiving portion 21A that receives the first core wire 11A and a first contact pressure applying portion 21B that applies a predetermined contact pressure to the first core wire 11A by pressing the first core wire 11A between the first receiving portion 21A and the first core wire 11A.

[0033] According to the above-described connection structure 10, the first receiving portion 21A and the first contact pressure applying portion 21B that constitute the first connecting portion 21 are integrally formed as a single component, which makes it easy to manage the gap (the dimension between the first receiving portion 21A and the first contact pressure applying portion 21B). The first core wire 11A of the first electric wire 11 is inserted between the first receiving portion 21A and the first contact pressure applying portion 21B and pressed therebetween, thereby receiving a predetermined contact pressure, and therefore the first core wire 11A and the first connecting portion 21 are electrically connected to each other.

[0034] The first connecting portion 21, the connecting portion 23 and the second connecting portion 22 are arranged side by side in the front-to-rear direction, the first receiving portion 21A is flat and elongated in the front-to-rear direction, a pair of first contact pressure applying portions 21B are provided rising from both the left and right side edges of the first receiving portion 21A, the pair of first contact pressure applying portions 21B are provided symmetrically with respect to an axis L extending up and down through the left-to-right center of the first receiving portion 21A, and it is preferable that the first connecting portion 21 is formed so as to have a cylindrical shape when viewed from the front-to-rear direction by the first receiving portion 21A and the pair of first contact pressure applying portions 21B. Since the first connecting portion 21 is formed to have a cylindrical shape, it becomes easier to measure the gap from the front-rear direction, and it becomes even easier to manage the gap.

[0035] It is preferable that the first receiving portion 21A has a bead 21C that protrudes toward the first core wire 11A and extends in the front-to-rear direction, and the first contact pressure applying portion 21B has a bead 21D that protrudes toward the first core wire 11A and extends in the front-to-rear direction. Since the first receiving portion 21A contacts the first core wire 11A via the bead 21C and the first contact pressure applying portion 21B contacts the first core wire 11A via the bead 21D, a high contact pressure can be applied to the first core wire 11A without providing a spring such as an elastic contact piece within the first connection portion 21.

[0036] It is preferable that the first connecting portion 21 and the second connecting portion 22 are a single component of the same shape, and that the first connecting portion 21, the linking portion 23 and the second connecting portion 22 are integrally formed. This also makes it easy to manage the gap of the second connecting portion 22 (the dimension between the second receiving portion 22A and the second contact pressure applying portion 22B). The second core wire 12A of the second electric wire 12 is inserted between the second receiving portion 22A and the second contact pressure applying portion 22B and pressed, so that the second electric wire 12 and the second connecting portion 22 are electrically conductively connected. The first connecting portion 21, the linking portion 23, and the second connecting portion 22 are integrally formed, so that the first electric wire 11 and the second electric wire 12 are electrically conductively connected via the terminal 20.

[0037] <Embodiment 2> A second embodiment of the present disclosure will be described with reference to Figures 6 to 8. A connection structure 110 between a terminal and an electric wire according to the second embodiment is obtained by adding a guide shape to the terminal 20 according to the first embodiment. In the configuration of the terminal 50 according to the second embodiment, the same configuration as that of the terminal 20 according to the first embodiment will be assigned a reference numeral with the tens digit changed from 2 to 5, and the description thereof may be omitted.

[0038] Terminal 50 has a first connecting portion 51, a second connecting portion 52, a connecting portion 53, a first guide portion 54 extending rearward from the rear end of first connecting portion 51, and a second guide portion 55 extending rearward from the rear end of second connecting portion 52. First guide portion 54 and second guide portion 55 have an inward-facing shape that widens toward the rear. Because first guide portion 54 and second guide portion 55 have the same shape, the following description will be given using first guide portion 54 as a representative, and components with the same configuration as first guide portion 54 will be assigned reference numerals with the ones digit changed from 4 to 5.

[0039] 6 and 7, the first guide portion 54 is continuous with the rear end of the first connecting portion 51 and is formed integrally with the first connecting portion 51. The first guide portion 54 is a single component formed integrally with a first bottom wall 54A and a pair of first side walls 54B rising upward from both side edges of the first bottom wall 54A.

[0040] The first bottom wall 54A has a flat plate shape and is continuous with the rear end of the first receiving portion 51 A. As shown in Fig. 8, the first bottom wall 54A is formed so that it slopes downward toward the rear and has an increased dimension in the left-right direction.

[0041] The left first side wall 54B is continuous with the rear end of the left first contact pressure applying portion 51 B. The left first side wall 54B protrudes upward from the left edge of the first bottom wall 54A and then extends in an arc in the clockwise direction just before the position corresponding to the bead 51D when viewed from the front-to-rear direction.

[0042] The right first side wall 54B is continuous with the rear end of the right first contact pressure applying portion 51B. The right first side wall 54B protrudes upward from the right edge of the first bottom wall 54A and then extends in an arc in the counterclockwise direction just before the position corresponding to the bead 51D when viewed from the front-to-rear direction.

[0043] The pair of first side walls 54B are formed so that the height dimension from the first bottom wall 54A increases toward the rear and the distance therebetween in the left-right direction also increases.

[0044] When the first core 11A of the first electric wire 11 is inserted into the first connecting portion 51 from the rear, the first core 11A is guided by the first guide portion 54 and enters the first connecting portion 51, and receives a predetermined contact pressure from the bead 51C of the first receiving portion 51A and the pair of beads 51D of the pair of first contact pressure applying portions 51B, thereby electrically connecting the first core 11A to the first connecting portion 51. Similarly, when the second core 12A of the second electric wire 12 is inserted into the second connecting portion 52 from the rear, the second core 12A is guided by the second guide portion 55 and enters the second connecting portion 52, and receives a predetermined contact pressure from the bead 52C of the second receiving portion 52A and the pair of beads 52D of the pair of second contact pressure applying portions 52B, thereby electrically connecting the second core 12A to the second connecting portion 52. As a result, the first electric wire 11 and the second electric wire 12 are electrically connected via the terminal 50 .

[0045] [Other embodiments] (1) In the above first and second embodiments, the first connection part has a pair of contact pressure applying parts. However, the number of contact pressure applying parts that the first connection part has may be one, or three or more.

[0046] (2) In the above-mentioned embodiments 1 and 2, a pair of first contact pressure applying portions are formed symmetrically with respect to the axis L, but this does not have to be symmetrical, and the pair of first contact pressure applying portions may be formed asymmetrically with respect to the axis L so that the entire first connection portion has a cylindrical shape.

[0047] (3) In the above first and second embodiments, the first connection portion has a bead. However, instead of the bead, a spring such as a resilient contact piece may be provided in the first connection portion.

[0048] (4) In the above-described first embodiment, the contact pressure is increased by a rubber plug separate from the terminal 20, but the contact pressure may be increased by a separate SUS spring. [Explanation of symbols]

[0049] 10: Connection structure between terminal and electric wire 11: First electric wire 11A: First core wire 11B: First insulating sheath 12: Second electric wire 12A: Second core wire 12B: Second insulating sheath 13: Carrier 20: Terminal 21: First connecting portion 21A: First receiving portion 21B: First contact pressure applying portion 21C: Bead 21D: Bead 22: Second connecting portion 22A: Second receiving portion 22B: Second contact pressure applying portion 22C: Bead 22D: Bead 23: Connecting portion 30: First rubber stopper 31: Receiving hole 40: Second rubber stopper 41: Notch 42: Receiving hole 50: Terminal 51: First connecting portion 51A: First receiving portion 51B: First contact pressure applying portion 51C: Bead 51D: Bead 52: Second connecting portion 52A: Second receiving portion 52B: Second contact pressure applying portion 52C: Bead 52D: Bead 53: Linking portion 54: First guide portion 54A: First bottom wall 54B: First side wall 55: Second guide portion 55A: Second bottom wall 55B: Second side wall 110: Terminal and wire connection structure L: Axis S: Gap

Claims

1. A connection structure between a terminal and an electric wire, comprising: a first electric wire; a second electric wire; a terminal that connects the first electric wire and the second electric wire; and a rubber plug having an accommodation hole that accommodates the entire terminal, The first electric wire has a first core wire and a first insulating coating surrounding the first core wire, The second electric wire has a second core wire and a second insulating coating surrounding the second core wire, the terminal has a first connection portion connected to the first core wire, a second connection portion connected to the second core wire, and a connecting portion connecting the first connection portion and the second connection portion, the first connection portion is a single component in which a first receiving portion that receives the first core wire and a first contact pressure applying portion that applies a predetermined contact pressure to the first core wire by pressing the first core wire between the first receiving portion and the first contact pressure applying portion are integrally formed, When the first core wire is inserted into the first connection portion, the pair of contact pressure applying portions elastically expand and deform so as to move apart from each other, The first contact pressure applying portion elastically contacts the inner wall of the receiving hole, and thereby a contact pressure due to the elasticity of the rubber plug is applied to the first core wire, A connection structure between a terminal and an electric wire, in which, when the terminal is accommodated in the accommodation hole of the rubber stopper, the first core wire is subjected to contact pressure due to the elasticity of the rubber stopper in addition to contact pressure due to the elasticity of the first contact pressure applying portion itself.

2. the first connection portion, the coupling portion, and the second connection portion are arranged side by side in the front-rear direction, The first receiving portion has a flat plate shape and is elongated in the front-rear direction, the first contact pressure applying portions are provided as a pair rising from both left and right side edges of the first receiving portion, the pair of first contact pressure applying portions being provided symmetrically with respect to an axis extending in a vertical direction through a center in a horizontal direction of the first receiving portion, 2. The terminal and wire connection structure according to claim 1, wherein the first connection portion is formed to have a cylindrical shape by the first receiving portion and a pair of the first contact pressure applying portions when viewed from the front-to-rear direction.

3. the first receiving portion has a bead that protrudes toward the first core wire and extends in the front-rear direction, The connection structure of a terminal and an electric wire according to claim 2 , wherein the first contact pressure applying portion has a bead that protrudes toward the first core wire and extends in the front-rear direction.

4. 4. The terminal and wire connection structure according to claim 1, wherein the first connection portion and the second connection portion are single components of the same shape, and the first connection portion, the connecting portion, and the second connection portion are integrally formed.

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