Terminal fitting

Abstract

A terminal fitting (10) is provided with: a cylindrical connection section (11); an elastically deformable elastic contact part (34) disposed on the inner side of the connection part (11); and a contact part (39) provided on the elastic contact part (34). On the inner side of the connecting part (11), a counterpart terminal fitting (90) is arranged in the front-back direction through an opening at the front end of the connecting part (11). The contact point portion (39) has a top portion (43) and a front inclined portion (44) extending obliquely forward from the top portion (43). The contact part (39) is provided with a gradually-thinned part (46), the thickness of which is gradually reduced toward the top part (43), on the front-side inclined part (44).

Description

Technical Field

[0001] The present invention relates to terminal parts. Background Art

[0002] The terminal parts disclosed in Patent Document 1 include an elastic contact portion (contact portion) and a top portion (electromechanical contact dome) provided on the elastic contact portion and contacting an opposing terminal part (opposing terminal). The elastic contact portion has a "free mechanical dome transition region" on the front side and a "fixed mechanical dome transition region" on the rear side, with the top portion therebetween. Such terminal parts are also disclosed in Patent Document 1 and Patent Document 2. Prior Art Documents Patent Documents

[0003] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2021-177482 (Fig. 9) Patent Document 2: Japanese Unexamined Patent Application Publication No. 2001-210418 Patent Document 3: Japanese Unexamined Patent Application Publication No. 2015-103410 Summary of the Invention Problems to be Solved by the Invention

[0004] In the terminal parts disclosed in Patent Document 1, in the "free mechanical dome transition region" and the "fixed mechanical dome transition region" (hereinafter simply referred to as "transition regions"), the plate thickness of the elastic contact portion changes sharply, and the plate thickness of the entire top portion becomes thinner. Therefore, when the elastic contact portion contacts the opposing terminal part and elastically deforms, there is a concern that stress will concentrate in the transition region, and when the terminal part and the opposing terminal part are connected, the connection resistance increases in the transition region, and the workability may deteriorate.

[0005] Here, an object of the present invention is to provide a terminal part that can improve the workability when connecting to an opposing terminal part. Means for Solving the Problems

[0006] The terminal part of the present invention includes: a cylindrical connection portion; an elastically deformable elastic contact portion disposed inside the connection portion; and a contact portion provided on the elastic contact portion. Inside the connection portion, an opposing terminal part is disposed in the front-rear direction through an opening at the front end of the connection portion. The contact portion has a top portion that contacts the opposing terminal part and a front inclined portion that extends obliquely forward from the top portion, and a gradually thinning thin-wall portion whose thickness gradually decreases toward the top portion is provided on the front inclined portion. Advantages of the Invention

[0007] According to the present invention, a terminal part that can improve the connection workability when connecting to an opposing terminal part can be provided. Brief Description of the Drawings

[0008] Figure 1 This is a perspective view of the terminal part related to Embodiment 1 of the present invention. Figure 2 This is a perspective view of the terminal part viewed from a direction Figure 1 different from the above. Figure 3 This is a front view of the terminal part. Figure 4 This is a top cross-sectional view of the connection part. Figure 5 This is a side cross-sectional view of the connection part. Figure 6 This is a side cross-sectional view showing the state where the mating terminal part is inserted into the inside of the connection part. Figure 7 This is a side cross-sectional view showing an enlarged view of the contact part of the connection part. Figure 8 This is a graph showing the relationship between the insertion force and the stroke of the mating terminal part inserted into the inside of the connection part. Detailed Embodiment

[0009] [Description of Embodiments of the Present Invention] First, embodiments of the present invention will be listed and described. (1) The terminal part of the present invention includes: a cylindrical connection part; an elastically deformable elastic contact part disposed inside the connection part; and a contact part provided on the elastic contact part. In the inside of the connection part, the mating terminal part is disposed in the front-rear direction through an opening at the front end of the connection part. The contact part has a top portion that contacts the mating terminal part and a front inclined portion that extends obliquely forward from the top portion, and a gradually thinning thin wall portion that gradually decreases in thickness toward the top portion is provided on the front inclined portion.

[0010] Due to the presence of the gradually thinning thin wall portion, the contact part having the above structure can increase the surface area compared to a contact part that is continuous with a constant thickness in the front-rear direction. Therefore, according to the above structure, when the elastic contact part contacts the mating terminal part, since the stress acting on the contact part can be widely dispersed over the gradually thinning thin wall portion, the workability such as the insertion workability when connecting the terminal part and the mating terminal part can be improved.

[0011] (2) Preferably, the surface of the contact part opposite to the surface that contacts the mating terminal part is a curved surface that curves toward the apex of the top portion.

[0012] According to the above structure, the stress acting on the contact part when the elastic contact part contacts the mating terminal part can be widely dispersed over the entire curved surface. In addition, the curved surface can be easily formed by hitting with a punch in stamping.

[0013] (3) Preferably, a pure metal plating layer is formed on the surface of the elastic contact portion. On the surface of the elastic contact portion facing the mating terminal part, the thickness of the pure metal plating layer of the contact portion is thinner than the thickness of the pure metal plating layer around the contact portion.

[0014] The mating terminal part of the above structure can contact the thin-wall pure metal plating layer at the top of the contact portion. Therefore, during the process of inserting the mating terminal part into the inner side of the connecting portion, the amount of plating scraping of the pure metal plating layer can be reduced, and the stress generated at the contact portion when the mating terminal part is inserted can be reduced.

[0015] (4) Preferably, the connecting portion has a receiving portion at a position facing the elastic contact portion, and the mating terminal part can be sandwiched between the receiving portion and the elastic contact portion. The elastic contact portion is in a strip shape, has a front-side extending portion extending rearward from a base end portion provided on the front-end side of the connecting portion so as to approach the receiving portion, and can be elastically deformed in the plate thickness direction of the front-side extending portion with the base end portion as a fulcrum. The front-side inclined portion is disposed on the rear-end side of the front-side extending portion. When the plate thickness of the portion of the front-side extending portion connected to the front end of the front-side inclined portion is set as ft and the plate thickness of the top portion is set as tt, the relational expression of 1 / 2 ≦ tt / ft ≦ 3 / 4 holds.

[0016] According to the above structure, the contact portion can be set with a plate thickness suitable for improving workability such as the insertion workability when the elastic contact portion and the mating terminal part are connected. Assuming that when tt / ft < 1 / 2, the plate thickness of the top portion becomes too thin, and it is difficult to obtain the contact load between the elastic contact portion and the mating terminal part. When tt / ft > 3 / 4, it is difficult to fully exert the stress dispersion effect of the gradually changing thin-wall portion.

[0017] [Details of the Embodiment of the Present Invention] The specific example of the present invention will be described below with reference to the drawings. In addition, the present invention is not limited to this example, but is shown by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0018] <Embodiment 1> The terminal part 10 according to Embodiment 1 of the present invention is integrally formed by bending a conductive metal plate or the like. The terminal part 10 includes a connecting portion 11 and cylindrical portions 12 and 13 arranged side by side with each other. In addition, in the following description, regarding the front-rear direction, the arrangement direction of the connecting portion 11 and the cylindrical portions 12 and 13 is taken as the front-rear direction, and the side where the connecting portion 11 is located with respect to the cylindrical portions 12 and 13 is taken as the front side. The up-down direction is based on the up-down direction of each drawing except Figure 4 and Figure 8 in addition.Figure 3 The left - right direction is taken as the reference. The up - down direction is synonymous with the height direction, and the left - right direction is synonymous with the width direction. Figure 1 and Figure 2 In the attached drawings, the reference signs X, Y, and Z of

[0019] (Structure of the terminal part) As Figure 1 and Figure 2 shown, the terminal part 10 is formed in an elongated shape in the front - rear direction. The terminal part 10 has a strip - like bottom plate part 14 extending over the entire length in the front - rear direction.

[0020] The cylindrical part includes the rear part of the bottom plate part 14 and has a wire cylindrical part 12 and an insulating cylindrical part 13. The wire cylindrical part 12 is arranged in front of the insulating cylindrical part 13 and has a pair of wire cylinder pieces 15 standing up from the left - and right - end sides of the rear part of the bottom plate part 14 respectively. The wire cylindrical part 12 is crimped and electrically connected to the core wire 62 exposed by removing the covering part 61 at the terminal part of the covered electric wire 60. The insulating cylindrical part 13 has a pair of insulating cylinder pieces 16 standing up from the left - and right - end sides of the rear part of the bottom plate part 14 respectively, and is crimped and mechanically connected to the covering part 61 at the terminal part of the covered electric wire 60.

[0021] The connecting part 11 has a rectangular - cylindrical shape that is long in the front - rear direction and is open on both the front and rear sides. As Figure 3 shown, the connecting part 11 has: the front part of the bottom plate part 14; a pair of side plate parts 17, 18 standing up from the left - and right - end sides of the front part of the bottom plate part 14 respectively; an inner plate part 19 that bends from the upper end of the side plate part 17 on one side ( Figure 3 the left side of Figure 3 to the side plate part 18 on the other side (

[0022] the right side of Figure 5 ), is disposed opposite to the bottom plate part 14; and an outer plate part 21 that bends from the upper end of the side plate part 18 on the other side towards the side plate part 17 on one side and overlaps with the upper - surface side of the inner plate part 19 (the outer - surface side of the connecting part 11).

[0023] As Figure 1As shown, a through-hole 23 penetrating in the plate thickness direction is provided in the outer plate portion 21. The through-hole 23 is disposed so as to be offset toward the other side of the outer plate portion 21 (the side where the other side plate portion 18 is located). At one end of the outer plate portion 21, a first locking piece 24 and a second locking piece 25 are arranged side by side in the front-rear direction. The first locking piece 24 and the through-hole 23 are arranged side by side in the left-right direction, and are bent at one end of the outer plate portion 21 and supported on the upper end of the one side plate portion 17. The second locking piece 25 is disposed rearward of the first locking piece 24 and is bent in a stepped shape and inserted and locked into a second locking hole 26 opened in the one side plate portion 17 (see Figure 4 ).

[0024] As Figure 2 shown, a third locking piece 27 is provided at a position on the other end of the inner plate portion 19 and forward of the through-hole 23. As Figure 4 shown, the third locking piece 27 is inserted and locked into a third locking hole 28 opened in the other side plate portion 18. Thus, by the first locking piece 24 being supported on the one side plate portion 17, the second locking piece 25 being inserted and locked into the second locking hole 26, and the third locking piece 27 being inserted and locked into the third locking hole 28, the square tube shape of the connecting portion 11 is maintained.

[0025] In addition, as Figure 1 and Figure 2 shown, a first protrusion 29 protruding upward (outside the connecting portion 11) in an inverted U shape (curved shape) is provided on the front end side of the outer plate portion 21. The rear end of the first protrusion 29 constitutes the front end of the through-hole 23. A second protrusion 31 protruding upward in an inverted U shape (curved shape) is also provided on the rear end side of the outer plate portion 21. The second protrusion 31 protrudes more than the first protrusion 29 (see Figure 3 ). On the rear end side of the outer plate portion 21, a notch portion 32 having a shape that defines the front end of the second protrusion 31 and is cut in the width direction is provided. As Figure 1 shown, the notch portion 32 is disposed rearward of the second locking piece 25.

[0026] Although not shown, the terminal part 10 is inserted into the cavity of the connector housing from the rear. A lance-shaped portion is formed to protrude in the cavity. The terminal part 10 is inserted into the cavity, and by the lance-shaped portion facing the through-hole 23 and being opposed to the rear end of the first protrusion 29 so as to be capable of being locked, the terminal part 10 is held in the connector housing in a state of being restricted from coming off rearward. Here, the second protrusion 31 is engaged with a guide groove communicating with the cavity to guide the insertion operation of the terminal part 10.

[0027] As Figure 5 shown, the inner plate portion 19 is composed of a base end portion 33 that is in close contact with the lower surface of the outer plate portion 21 on the front end side and an elastic contact portion 34 that extends rearward from the base end portion 33 in a cantilever shape. As Figure 4As shown, the third locking piece 27 is formed to project from the end on the other side of the base end portion 33.

[0028] The elastic contact portion 34 can elastically deform in the vertical direction (plate thickness direction) with the base end portion 33 as a fulcrum. As Figure 5 shown, the elastic contact portion 34 has a front side extension portion 35 and a rear side extension portion 36. The front side extension portion 35 extends obliquely downward in a manner approaching the receiving portion 22 as it goes rearward from the base end portion 33, and the rear side extension portion 36, except for the rear end side, extends obliquely upward in a manner moving away from the receiving portion 22 as it goes rearward. The rear end side of the rear side extension portion 36 is bent downward so that the upper surface faces the outer plate portion 21. The front side extension portion 35 and the rear side extension portion 36 are each formed with a constant vertical thickness ( Figure 7 the plate thickness ft shown later) except for the contact portion 39 described later.

[0029] As Figure 4 shown, the front side extension portion 35 has a large width portion 37 that extends rearward from the base end portion 33. The rear side extension portion 36 has a large width portion 37 continuous with the front side extension portion 35 and a small width portion 38 that extends rearward with a constant left - right width from the end on one side of the left - right of the rear end of the large width portion 37. The left - right width of the small width portion 38 is smaller than that of the large width portion 37, and is arranged side - by - side with the second locking piece 25 in the left - right direction to avoid interference with the second locking piece 25.

[0030] As Figure 5 shown, the elastic contact portion 34 has a contact portion 39 that bulges downward in a dome shape at the front - rear intermediate portion including the boundary between the front side extension portion 35 and the rear side extension portion 36. The upper surface of the contact portion 39 is configured as a curved surface 41 that is recessed in a curved shape from the periphery by hitting the upper surface of the elastic contact portion 34 with a punch (not shown) in stamping. As Figure 4 shown, the curved surface 41 has an outer peripheral edge portion 42 in a teardrop shape that extends long in the front - rear direction in a plan view and whose left - right width decreases as it goes forward. The outer peripheral edge portion 42 of the curved surface 41 has the maximum left - right width at the left - right center of the large width portion 37 at the boundary portion ( Figure 4 the dotted - line portion) between the front side extension portion 35 and the rear side extension portion 36. As Figure 2 shown, the curved surface 41 can be visually recognized through the through - hole 23 of the outer plate portion 21.

[0031] As Figure 7As shown, the contact portion 39 is composed of a top portion 43, a front inclined portion 44 that slopes upward as it goes forward from the top portion 43, and a rear inclined portion 45 that slopes upward as it goes backward from the top portion 43. The front-back length of the front inclined portion 44 is greater than the front-back length of the rear inclined portion 45, exceeding twice the front-back length of the rear inclined portion 45. The front inclined portion 44 is disposed on the rear end side of the front extension portion 35. The top portion 43 has a curved shape that protrudes downward at the boundary portion between the front extension portion 35 and the rear extension portion 36, and has a vertex 47 at the lowermost end of the elastic contact portion 34 that is the lower end. As Figure 5 shown, the top portion 43 is disposed opposite to the receiving portion 22 above the front-back central portion of the receiving portion 22.

[0032] The contact portion 39 has a gradually thinning wall portion 46 that gradually becomes a thin wall from the outer peripheral edge portion 42 of the curved surface 41 to the top portion 43 in a manner corresponding to the concave shape of the curved surface 41 over the entire front inclined portion 44, top portion 43, and rear inclined portion 45.

[0033] As Figure 7 shown, in a side cross-sectional view taken along the left-right central portion of the contact portion 39, the gradually thinning wall portion 46 of the front inclined portion 44 has a shape in which the up-down thickness gradually decreases from the front end of the front inclined portion 44 to the vertex 47 of the top portion 43. The upper surface and the lower surface of the gradually thinning wall portion 46 of the front inclined portion 44 are inclined toward the top portion 43 at a constant inclination angle with respect to the front-back direction. The upper surface of the gradually thinning wall portion 46 of the front inclined portion 44 constitutes the front portion of the curved surface 41. The upper surface of the gradually thinning wall portion 46 of the front inclined portion 44 approaches the lower surface of the gradually thinning wall portion 46 in a manner such that the inclination angle with respect to the front-back direction is larger than that of the lower surface of the gradually thinning wall portion 46 from the front end of the front inclined portion 44 to the vertex 47 of the top portion 43.

[0034] The upper surface of the gradually thinning wall portion 46 of the top portion 43 is the bottom portion of the curved surface 41, has a concave curved surface shape, and is continuously connected to the upper surface of the gradually thinning wall portion 46 of the front inclined portion 44 without a step. The lower surface of the gradually thinning wall portion 46 of the top portion 43 is continuously connected to the lower surface of the gradually thinning wall portion 46 of the front inclined portion 44 without a step. The top portion 43 constitutes the thinnest wall portion of the gradually thinning wall portion 46 at the position corresponding to the vertex 47. The upper surface of the gradually thinning wall portion 46 of the rear inclined portion 45 has a curved surface shape that slopes sharply upward from the upper surface of the gradually thinning wall portion 46 of the top portion 43. The lower surface of the gradually thinning wall portion 46 of the rear inclined portion 45 is continuously connected to the lower surface of the gradually thinning wall portion 46 of the top portion 43 without a step and slopes gently upward.

[0035] In addition, the surface of the terminal part 10 is subjected to a plating treatment such as tin plating, and has a structure in which a pure metal plating layer 48 (illustrated by a dotted line) made of a pure metal such as tin and an alloy plating layer made of a tin alloy or the like are laminated.

[0036] (Function of the terminal part) When manufacturing the terminal part 10, although not shown, first, the upper surface of the metal plate that has undergone the above plating treatment is struck by a punch of stamping to make it recessed. The pressing surface of the punch is formed in a shape corresponding to the curved surface 41 of the contact part 39. Thus, a contact part 39 with a shape bulging downward is formed on the metal plate. On the lower surface side of the contact part 39, due to the tensile stress accompanying the bulging, the outermost pure metal coating 48 extends thinly. Then, the metal plate is punched and further bent to form a square tube-shaped connecting part 11, etc., thereby manufacturing the terminal part 10.

[0037] Although not shown, the terminal part 10 is inserted into the cavity of the connector housing in a state of being connected to the terminal part of the covered electric wire 60, and is prevented from coming off in the connector housing through the lance part. Then, when the connector housing is fitted with another connector housing (not shown), as Figure 6 shown, the tab 91 of the other terminal part 90 is inserted into the inside of the connecting part 11 from the opening at the front end of the connecting part 11. The tab 91 is formed in a shape extending in the front-rear direction.

[0038] During the process of inserting the tab 91 of the other terminal part 90 into the inside of the connecting part 11, the tab 91 enters between the contact part 39 and the receiving part 22 in the front-rear direction, and slides on the lower surface of the front inclined part 44 (specifically, the lower surface of the gradually thinned wall part 46 of the front inclined part 44) and the upper surface of the receiving part 22. The elastic contact part 34 is pressed by the tab 91 and elastically deforms upward with the base end part 33 as a fulcrum. Then, the tab 91 reaches the position of contacting the apex 47 of the top part 43, and the fitting of the connector housing and the other connector housing is completed. At this time, as Figure 6 shown, the elastic contact part 34 makes the rear end side of the rear inclined part 45 contact the outer plate part 21 in the elastically deformed state. The tab 91 is clamped between the contact part 39 and the receiving part 22 in a state of contacting the apex 47 of the lower surface of the top part 43 and the front and rear end parts of the receiving part 22. Thus, the terminal part 10 and the other terminal part 90 are electrically connected.

[0039] During the process of inserting the tab 91 into the connecting part 11, the tab 91 contacts the front inclined part 44 and receives the elastic reaction force of the elastic contact part 34, gradually increasing the insertion force. Specifically, as the stroke (contact stroke) from the contact start position where the tab 91 starts to contact the front inclined part 44 to the contact completion position where it contacts the top part 43, the insertion force of the tab 91 gradually increases.

[0040] In the case of the first embodiment, since the tapered thin-walled portion 46 is provided in the contact portion 39, during the transition of the tab 91 from the contact start position to the contact completion position of the contact portion 39, the stress acting on the contact portion 39 is widely dispersed in the tapered thin-walled portion 46. Therefore, the insertion force of the tab 91 can be suppressed to be small. As a result, the fitting resistance between the connector housing and the mating connector housing can also be suppressed to be small, and the workability during connector fitting can be improved. In particular, in a multi-pole connector in which a plurality of terminal parts 10 are housed in a connector housing, the advantages of the above structure in which the tapered thin-walled portion 46 is provided in the contact portion 39 are great.

[0041] In addition, in the case of the first embodiment, since the contact portion 39 having a bulged shape is formed by punching a metal plate, as described above, a pure metal plating layer 48 that is thinner than the lower surface of the periphery of the contact portion 39 exists on the lower surface of the contact portion 39. By thinning the pure metal plating layer 48, when the tab 91 slides on the lower surface of the contact portion 39, the amount of plating scraping is reduced, and the generated stress can be reduced. Therefore, in the case of the first embodiment, together with the stress dispersion effect of the tapered thin-walled portion 46, by thinning the pure metal plating layer 48, the insertion force of the tab 91 can be further reduced.

[0042] However, in the Figure 7 shown case, when the upper and lower thickness of the thinnest portion in the tapered thin-walled portion 46, that is, the upper and lower thickness of the tapered thin-walled portion 46 along the perpendicular line passing through the vertex 47 of the top 43 (the plate thickness in the up and down direction as the direction of elastic deformation of the elastic contact portion 34) is set as tt, and the upper and lower thickness of the portion in the front side extension portion 35 connected to the front end of the front side inclined portion 44 is set as tf, the relational expression of tt / ft = 1 / 2 holds. That is, the plate thickness tt of the top 43 of the tapered thin-walled portion 46 is sufficiently smaller than the plate thickness ft of the front side extension portion 35. Therefore, the area of the curved surface 41 of the tapered thin-walled portion 46 also becomes larger, and the stress can be dispersed in a larger range.

[0043] Figure 8 is a graph showing the relationship between the stroke and the insertion force of the tab 91 in a reference (solid line in the figure) where the relational expression of tt / ft = 1 holds when the tapered thin-walled portion 46 is not provided in the contact portion 39 in the terminal part 10 with a plate thickness of 0.5 mm in portions other than the tapered thin-walled portion 46, a mode A (dashed line in the figure) where the relational expression of tt / ft = 1 / 2 holds when the tapered thin-walled portion 46 is provided in the above contact portion 39, and a mode B (double-dot chain line in the figure) where the relational expression of tt / ft = 3 / 4 holds when the tapered thin-walled portion 46 is provided in the contact portion 39.

[0044] As Figure 8As shown in the curve graph, compared with the reference, both in Mode A and Mode B, the insertion peak is significantly reduced, and the insertion force is reduced throughout the entire area of the stroke. Therefore, for the terminal part 10 with the elastic contact part 34 satisfying the relation of 1 / 2 ≦ tt / ft ≦ 3 / 4, the insertion force of the tab 91 can be reduced, and further, the workability during the connection of the connectors can be improved. In addition, when tt / ft < 1 / 2, the contact part 39 becomes too thin, and it is difficult to obtain the contact load between the elastic contact part 34 and the mating terminal part 90. On the other hand, when tt / ft > 3 / 4, the insertion force of the tab 91 cannot be significantly reduced relative to the reference, and it is difficult to fully exert the stress dispersion effect of the gradually tapered thin-walled part 46.

[0045] As described above, according to the first embodiment, when the elastic contact part 34 contacts the tab 91 of the mating terminal part 90, the stress acting on the contact part 39 can be widely dispersed to the gradually tapered thin-walled part 46, and the insertion force of the tab 91 can be reduced. Therefore, according to the first embodiment, a terminal part 10 can be provided that can improve the workability during the connection of the connectors (when the terminal part 10 and the mating terminal part 90 are connected).

[0046] [Other Embodiments of the Present Invention] It should be considered that the above-described first embodiment of the present disclosure is illustrative in all aspects and not restrictive. In the case of the above-described first embodiment, the elastic contact part extends in a cantilever shape from the base end part toward the rear, and the contact part provided with the gradually tapered thin-walled part is provided at the top part of the front-rear intermediate part. In contrast, according to other embodiments, the elastic contact part may also extend in a cantilever shape from the base end part toward the front, and the contact part provided with the gradually tapered thin-walled part is provided at the part bent downward on the front end side. Alternatively, the elastic contact part may also be in a double-column shape arched between the base end parts of the ends provided on both sides of the front and rear of the connection part, and the contact part provided with the gradually tapered thin-walled part is provided at the top part of the arch. In the case of the above-described first embodiment, the gradually tapered thin-walled part is formed throughout the entire contact part. In contrast, according to other embodiments, the gradually tapered thin-walled part may also be formed only on the front-side inclined part of the contact part, or may be formed on the front-side inclined part and the top part, rather than on the rear-side inclined part. In the case of the above-described first embodiment, the gradually tapered thin-walled part is formed into a thin wall by the concave shape of the curved surface provided on the side opposite to the side where the contact part contacts the mating terminal part. In contrast, according to other embodiments, the gradually tapered thin-walled part may also be formed into a thin wall by the concave shape provided on the side where the contact part contacts the mating terminal part. Reference Numeral Explanation

[0047] 10: Terminal Part 11: Connection Part 12: Bobbin part (cylindrical part) 13: Insulating cylinder part (cylindrical part) 14: Bottom plate part 15: Bobbin piece 16: Insulating cylinder piece 17: Side plate part on one side (side plate part) 18: Side plate part on the other side (side plate part) 19: Inner plate part 21: Outer plate part 22: Receiving part 23: Through hole 24: First locking piece 25: Second locking piece 26: Second locking hole 27: Third locking piece 28: Third locking hole 29: First protrusion 31: Second protrusion 32: Notch part 33: Base end part 34: Elastic contact part 35: Front side extension part 36: Rear side extension part 37: Large width 38: Small width part 39: Contact part 41: Curved surface 42: Outer peripheral edge part 43: Top 44: Front side inclined part 45: Rear side inclined part 46: Gradually changing thin wall part 47: Vertex 48: Pure metal coating 60: Coated electric wire 61: Coating part 62: Core wire 90: Opposite terminal part 91: Tab

Claims

1. A terminal component, comprising: A cylindrical connecting portion; An elastically deformable elastic contact portion disposed inside the connecting portion; and A contact portion provided on the elastic contact portion, wherein, Inside the connection part, the mating terminal part is arranged in the front-rear direction through the opening at the front end of the connection part. The contact part has a top part that contacts the mating terminal part and a front inclined part that extends obliquely forward from the top part. A tapered thin-wall part with a thickness gradually decreasing toward the top part is provided on the front inclined part.

2. The terminal component according to claim 1, wherein, The surface of the contact part on the side opposite to the surface that contacts the mating terminal part is a curved surface that curves toward the apex of the top part.

3. The terminal component according to claim 1, wherein, A pure metal plating layer is formed on the surface of the elastic contact part. On the surface of the elastic contact part on the side facing the mating terminal part, the thickness of the pure metal plating layer of the contact part is thinner than the thickness of the pure metal plating layer around the contact part.

4. The terminal component according to any one of claims 1 to 3, wherein, The connection part has a receiving part at a position facing the elastic contact part, and the mating terminal part can be sandwiched between the receiving part and the elastic contact part. The elastic contact part is in the shape of a strip plate, has a front extending part that extends rearward from a base end part provided on the front end side of the connection part in a manner approaching the receiving part, and can be elastically deformed in the plate thickness direction of the front extending part with the base end part as a fulcrum. The front inclined part is arranged on the rear end side of the front extending part. When the plate thickness of the part of the front extending part connected to the front end of the front inclined part is set as ft and the plate thickness of the top part is set as tt. The relational expression of 1 / 2 ≤ tt / ft ≤ 3 / 4 holds.

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