female terminal member
By setting a limiting part in the main body of the female terminal, the displacement range of the elastic contact piece is limited, thus solving the problem of damage at the fulcrum and improving durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SUMITOMO WIRING SYSTEMS LTD
- Filing Date
- 2021-03-24
- Publication Date
- 2026-05-19
AI Technical Summary
When external force is applied to the elastic contact plate, the fulcrum of the existing female terminal is easily damaged, and the elastic contact plate is easily deformed, resulting in a decrease in durability.
By providing a limiting part in the main body of the female terminal, the displacement range of the free end side of the elastic contact piece is limited to be less than the plate thickness, thereby reducing stress concentration at the support point.
This improves the durability of the elastic contact piece, reduces damage to the fulcrum, and extends the service life of the female terminal.
Smart Images
Figure CN115428267B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to female terminal components. Background Technology
[0002] Patent Document 1's female terminal includes: a cylindrical main body; and an elastic contact plate supported inside the main body, extending from one opening into which the male terminal is inserted toward the other opening. A pair of blades protruding in the width direction are provided on the elastic contact plate. The blades enter holes provided in the side plate portion of the main body. Gaps exist between the upper and lower edges of the holes and the blades. The blades are restricted from moving in the up-and-down direction by contacting the upper and lower edges of the holes. Similarly, the terminal parts in Patent Documents 2-5 also have a structure where the elastic contact plate's movement in the up-and-down direction is restricted by the limiting portion of the main body.
[0003] Existing technical documents
[0004] Patent documents
[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-147095
[0006] Patent Document 2: Japanese Patent Application Publication No. 2017-33866
[0007] Patent Document 3: Japanese Patent Application Publication No. 2006-294496
[0008] Patent Document 4: Japanese Patent Application Publication No. 2006-216315
[0009] Patent Document 5: Japanese Patent Application Publication No. 2005-166594 Summary of the Invention
[0010] The problem that the invention aims to solve
[0011] In the female terminal of Patent Document 1, the following considerations are taken into account: when an external force is applied to the elastic contact plate, the stress on the fulcrum side (one open side) of the elastic contact plate increases, thereby causing damage to the fulcrum side. In particular, because the female terminal of Patent Document 1 has a relatively large gap between the upper and lower edges of the hole and the blade, the blade displacement is large, and the elastic contact plate is prone to deformation.
[0012] This disclosure is made based on the above circumstances, with the aim of providing a female terminal part that improves the durability of the resilient contact piece.
[0013] Solution for solving the problem
[0014] The female terminal component disclosed herein includes:
[0015] a cylindrical body; and
[0016] An elastic contact piece extends from the fulcrum portion toward the free end inside the main body portion and contacts the male protrusion piece inserted into the opposite side of the main body portion.
[0017] The free end of the elastic contact piece is displaced in the thickness direction of the elastic contact piece.
[0018] The main body has a limiting part that contacts the elastic contact piece, limiting the displacement range of the free end side to less than the thickness of the elastic contact piece.
[0019] Invention Effects
[0020] According to this disclosure, a female terminal component can be provided that improves the durability of the elastic contact piece. Attached Figure Description
[0021] Figure 1 This is a right view of the female terminal component of Embodiment 1.
[0022] Figure 2 This is the front view of the female terminal component.
[0023] Figure 3 This is the left view of the female terminal component.
[0024] Figure 4 This is a top view of the female terminal component.
[0025] Figure 5 This is a bottom view of the female terminal component.
[0026] Figure 6 yes Figure 2 AA sectional view.
[0027] Figure 7 yes Figure 2 BB cross-sectional view.
[0028] Figure 8 It is Figure 1 An enlarged view showing the periphery of the right rear opening.
[0029] Figure 9 This is an explanatory diagram illustrating the state in which a male protrusion is inserted into the main body.
[0030] Figure 10 This is a cross-sectional view of the female terminal component of Embodiment 2, viewed from the rear side.
[0031] Figure 11 This is an explanation Figure 10 An explanatory diagram of the first modified example of the female terminal part.
[0032] Figure 12 This is an explanation Figure 10 The illustration shows the second modified example of the female terminal part.
[0033] Figure 13 This is a right view of the female terminal component of Embodiment 3.
[0034] Figure 14 It is Figure 13 An enlarged view showing the periphery of the right rear opening. Detailed Implementation
[0035] [Description of embodiments of this disclosure]
[0036] First, the implementation methods of this disclosure are listed and explained.
[0037] The female terminal component disclosed herein,
[0038] (1) It comprises: a cylindrical main body; and an elastic contact piece extending from a fulcrum portion toward a free end portion inside the main body portion, contacting a male protrusion inserted into the opposite side of the main body portion, wherein the free end portion of the elastic contact piece is displaced in the thickness direction of the elastic contact piece, the main body portion having a limiting portion that contacts the elastic contact piece and limits the displacement range of the free end portion to below the thickness of the elastic contact piece.
[0039] By limiting the displacement range of the free end side of the elastic contact piece to less than or equal to the plate thickness using the limiting part, the displacement amount of the fulcrum side of the elastic contact piece can be suppressed compared to the case where the displacement range is greater than the plate thickness. Therefore, the stress generated on the fulcrum side when an external force is applied to the elastic contact piece (such as when vibration occurs during transportation) can be reduced, and damage to the fulcrum side can be easily avoided.
[0040] (2) Preferably, the elastic contact piece has a protrusion extending from the free end in the width direction, the main body has a side plate, the side plate is provided with an opening, the protrusion is located in the opening, and the edge of the opening is configured as the limiting part.
[0041] According to this structure, by the protrusion contacting the limiting portion of the edge portion, which is configured as an opening, the displacement range is limited to below the thickness of the elastic contact piece. Thus, by providing an opening in the side plate of the main body, a structure that restricts the displacement of the elastic contact piece can be easily achieved.
[0042] (3) Preferably, the main body has: a base plate; and a side plate, which stands upright from the base plate. The limiting part has: a first limiting part, which is disposed on the upright side of the side plate; and a second limiting part, which is disposed on the side opposite to the first limiting part across the free end. The distance between the first limiting part and the free end is greater than the distance between the second limiting part and the free end.
[0043] According to this structure, when the side plate is erected from the base plate, interference of the free end with the first limiting part can be prevented.
[0044] (4) Preferably, the elastic contact piece has a contact portion that contacts the male protrusion piece, and the distance from the fulcrum portion to the contact portion is less than the distance from the contact portion to the free end.
[0045] According to this structure, the contact portion can be moved closer to the fulcrum side, which reduces the displacement of the fulcrum side of the elastic contact piece compared to a structure that moves the contact portion closer to the free end side. Therefore, the stress generated on the fulcrum side when an external force is applied to the elastic contact piece can be further reduced.
[0046] [Details of the embodiments of this disclosure]
[0047] [Example 1]
[0048] Reference Figures 1-9 Embodiment 1 illustrates the embodiment of the female terminal component of this disclosure. In this embodiment 1, regarding the front-to-back direction, Figure 1 , 4 In steps 7 and 9, the left side is designated as the front, and the right side as the back. Regarding the up and down directions, [the text continues with further details about positioning and orientation]. Figures 1-3 The directions shown in 6, 8, and 9 are defined as up and down as is. Regarding the left and right directions, Figure 2 The directions shown are defined as left and right as is.
[0049] Figure 1 The female terminal component 10 of this embodiment 1 is integrally formed by bending a conductive metal plate, and can be connected to the male terminal component 110 on the opposite side. The female terminal component 10 includes a main body 20 and an elastic contact piece 40 (see reference). Figure 6 (etc.) and wire connection part 50. The wire connection part 50 is an open cylindrical shape and can be electrically connected to the end of the wire by crimping.
[0050] like Figure 1 , 2 As shown, the main body 20 is a square tube extending through the front-to-back direction. The main body 20 is inserted into the male protrusion 120 of the male terminal part 110 (see reference). Figure 9 The main body 20 has a base plate 21 and a left side plate 22 (see reference). Figure 3 ) and right side plate 23 and top plate 24. Bottom plate 21 is a slender plate in the front-to-back direction. (e.g.) Figure 5 As shown, a lance hole 21A is provided on the base plate 21. The lance hole 21A is a square opening that extends along the left and right sides of the base plate 21. Figure 6As shown, a protrusion 21B is provided on the front side of the base plate 21 and the front side of the spear-shaped hole 21A. The protrusion 21B is formed, for example, by hammering it out from the lower side. The left side plate 22 and the right side plate 23 stand up from the left and right ends of the base plate 21, respectively.
[0051] The top plate 24 extends parallel to the bottom plate 21 from the upper end of the right side plate 23 toward the left side plate 22. A portion of the left end of the top plate 24 touches the upper end of the left side plate 22 from above. Figure 6 As shown, a front locking plate 24A and a right locking plate 24B are provided on the left end of the top plate 24 where they do not abut against the upper end of the left side plate 22. The front locking plate 24A and the right locking plate 24B extend downward along the inner surface of the left side plate 22 (in an overlapping manner).
[0052] The right-side locking plate 24B is generally square. The lower end of the right-side locking plate 24B is located at a lower position in the main body 20 (close to the base plate 21). A notch 24C that is recessed upward is provided at the center of the lower end of the right-side locking plate 24B in the front-rear direction.
[0053] like Figure 6 As shown, a tab receiving portion 24D is formed on the top plate 24 by being knocked downwards. A tab entry space 24E is formed between the lower surface of the tab receiving portion 24D and the upper surface of the elastic contact piece 40 (described later). The tab entry space 24E is used to allow the male tab 120, which is inserted into the main body portion 20 from the front, to enter.
[0054] like Figure 1 As shown, a front right opening 25 and a rear right opening 26 are provided at the front and rear positions of the right side plate 23. The front right opening 25 is located at a position corresponding to the lower end of the front locking plate 24A (overlapping in the left-right direction). The front right opening 25 is square. The rear right opening 26 is located at a position corresponding to the notch 24C of the right side locking plate 24B (overlapping in the left-right direction). The rear right opening 26 is square, corresponding to the notch 24C of the right side locking plate 24B.
[0055] like Figure 8 As shown, a first limiting part 31 and a second limiting part 32 are provided in the main body 20. The first limiting part 31 and the second limiting part 32 contact the elastic contact piece 40 and limit the displacement range of the free end 42 side of the elastic contact piece 40. The first limiting part 31 is provided in the right rear opening 26. The first limiting part 31 is provided on the upright side (upper side) of the right rear opening 26 in the right side plate 23. The first limiting part 31 is formed by the edge of the upper side of the right rear opening 26.
[0056] like Figure 8As shown, the second limiting part 32 is located on the side (lower side) opposite to the first limiting part 31, across the free end 42 of the elastic contact piece 40. Figure 6 As shown, a second limiting part 32 is provided on the base plate 21. The second limiting part 32 is located in the base plate 21 at a position rearward than the spear-shaped hole 21A. The second limiting part 32 supports the elastic contact piece 40. The second limiting part 32 is formed by, for example, being knocked out from below. The second limiting part 32 contacts the free end 42 of the elastic contact piece 40, which elastically flexes due to interference from the male protrusion 120, and supports the elastic contact piece 40.
[0057] like Figure 6 As shown, the elastic contact piece 40 is housed within the main body 20. The elastic contact piece 40 and the male protrusion 120 of the male terminal part 110 inserted into the main body 20 (see reference) Figure 9 Contact. (e.g.) Figure 6 As shown, the elastic contact piece 40 extends rearward in a cantilevered shape from the front end of the base plate 21 in a folded-back manner. The elastic contact piece 40 has an elongated shape in the front-rear direction, extending from the fulcrum portion (bent portion) 41 toward the free end 42. The fulcrum portion 41 is a semi-circular arc shape connected to the front end of the base plate 21. The elastic contact piece 40 has an extension portion 44. The extension portion 44 extends rearward from the fulcrum portion 41. The extension portion 44 has a forward-tilted portion 44A and a backward-tilted portion 44B. The forward-tilted portion 44A extends obliquely upward and rearward from the upper end of the fulcrum portion 41. The backward-tilted portion 44B extends obliquely downward and rearward from the rear end of the forward-tilted portion 44A.
[0058] In its free state (natural state) without elastic deflection, the free end 42 of the elastic contact piece 40 is positioned above the base plate 21 in a non-contact position. Therefore, the elastic contact piece 40 is cantilevered and supported on the base plate 21 at its front end. The elastic contact piece 40 can elastically deform in the vertical direction while primarily deflecting the fulcrum 41, using the fulcrum 41 as a fulcrum. The free end 42 of the elastic contact piece 40 is displaced in the thickness direction of the elastic contact piece 40. When the elastic contact piece 40 elastically deflects downwards, it contacts the second limiting portion 32 of the base plate 21 through its free end 42, thus becoming supported at both ends.
[0059] like Figure 6 As shown, a dome-shaped contact portion 45 is provided at the rear end (highest part) of the forward-leaning portion 44A, striking upwards. The contact portion 45 and the male protrusion 120 (see reference) Figure 9 Contact. The distance from the fulcrum 41 to the contact point 45 is less than the distance from the contact point 45 to the free end 42.
[0060] like Figure 7As shown, a pair of front protrusions 46 and a pair of right protrusions 47 are provided on the left and right sides of the elastic contact piece 40. The front protrusions 46 and the right protrusions 47 extend outward in a flush manner in the width direction. The front protrusions 46 are located near the contact portion 45, that is, slightly forward of the contact portion 45. The front protrusions 46 are located in a position corresponding to the lower edge of the front locking plate 24A and the right front opening 25 in the front-rear direction. In the free state (natural state) where the elastic contact piece 40 does not elastically flex, the upper surface of the left front protrusion 46 is located in a non-contact position slightly below the lower edge of the front locking plate 24A. The upper surface of the right front protrusion 46 is located in a non-contact position slightly below the upper edge of the right front opening 25.
[0061] like Figure 7 As shown, the right protrusion 47 extends laterally from the free end 42 in the width direction (left-right direction). The right protrusion 47 forms part of the free end 42. The right protrusion 47 is located at a position corresponding to the notch 24C of the right locking plate 24B and the right rear opening 26 in the front-back direction. The right protrusion 47 on the right side is located within the right rear opening 26. In the free state (natural state) where the elastic contact piece 40 does not elastically flex, the upper surface of the right protrusion 47 on the left side is located in a non-contact position slightly below the notch 24C of the right locking plate 24B. The upper surface of the right protrusion 47 on the right side is located in a non-contact position slightly below the first limiting part 31. At this time, the distance between the upper surface of the right protrusion 47 on the right side and the first limiting part 31 is less than the thickness of the elastic contact piece 40. The lower surface of the free end 42, including the right protrusion 47 on the left side and the right protrusion 47 on the right side, is in contact with the second limiting part 32. Furthermore, the lower surface of the free end 42 may not contact the second limiting part 32 but may be close to it.
[0062] The first limiting part 31 and the second limiting part 32 come into contact with the elastic contact piece 40, limiting the displacement range of the free end 42 side of the elastic contact piece 40 to less than the thickness of the elastic contact piece 40. That is, when the free end 42 of the elastic contact piece 40 changes between a state of contact with the first limiting part 31 and a state of contact with the second limiting part 32 (when displacing in the vertical direction), it is displaced by a distance less than the thickness of the elastic contact piece 40.
[0063] like Figure 8As shown, the vertical length of the gap between the first limiting part 31 and the free end 42 (right protrusion 47) is L1 in the foremost part (the portion along the leading edge of the right protrusion 47), L2 in the middle part (the central portion between the front and rear of the right protrusion 47), and L3 in the rearmost part (the portion along the trailing edge of the right protrusion 47). Each length (L1, L2, L3) of the gap between the first limiting part 31 and the free end 42 (right protrusion 47) is less than the plate thickness L4 of the elastic contact piece 40.
[0064] In the case where the lower surface of the free end 42 is close to the second limiting part 32 when the elastic contact piece 40 is in a free state (natural state), the distance between the first limiting part 31 and the free end 42 is greater than the distance between the second limiting part 32 and the free end 42.
[0065] When the elastic contact piece 40 is in a free state (natural state), the gap between the first limiting part 31 and the free end 42 gradually increases as it moves toward the rear. That is, the lengths (L1, L2, L3) of the gap between the first limiting part 31 and the free end 42 increase in the order of L1, L2, L3.
[0066] When connecting the male terminal 110 to the female terminal 10, the male protrusion 120 is inserted from the front into the protrusion insertion space 24E of the main body 20. The male protrusion 120, inserted into the protrusion insertion space 24E, is elastically held between the protrusion receiving portion 24D and the contact portion 45 while the elastic contact piece 40 elastically flexes. Through the elastic restoring force of the elastic contact piece 40, the male protrusion 120 and the main body 20 are electrically connected.
[0067] As described above, the female terminal component 10 of this disclosure limits the displacement range of the free end 42 side of the elastic contact piece 40 to less than the plate thickness by means of the first limiting portion 31 and the second limiting portion 32. This suppresses the displacement amount of the fulcrum portion 41 side of the elastic contact piece 40 compared to the case where the displacement range is greater than the plate thickness. Therefore, when an external force is applied to the elastic contact piece 40 (e.g., when vibration occurs during transport), the stress generated on the fulcrum portion 41 side can be reduced, and damage to the fulcrum portion 41 side can be easily avoided.
[0068] The female terminal part 10 of this disclosure contacts the first limiting part 31 of the edge portion configured as a right rear opening 26 via the right side protrusion 47, thereby limiting the displacement range to below the thickness of the elastic contact piece 40. In this way, by providing an opening in the right side plate 23 of the main body 20, a structure that restricts the displacement of the elastic contact piece 40 can be easily realized.
[0069] In the female terminal part 10 of the present disclosure, the distance between the first restricting part 31 and the free end part 42 is greater than the distance between the second restricting part 32 and the free end part 42. With this structure, when the right side plate 23 is erected from the bottom plate 21, interference of the free end part 42 with the first restricting part 31 can be prevented.
[0070] In the female terminal part 10 of the present disclosure, the distance from the fulcrum part 41 to the contact part 45 in the elastic contact piece 40 is less than the distance from the contact part 45 to the free end part 42. With this structure, the contact part 45 can be made closer to the fulcrum part 41 side, and compared with a structure that makes the contact part 45 closer to the free end part 42 side, the displacement amount on the fulcrum part 41 side of the elastic contact piece 40 can be reduced. Therefore, the stress generated on the fulcrum part 41 side when an external force is applied to the elastic contact piece 40 can be further reduced.
[0071] [Embodiment 2]
[0072] Figure 10 It is a drawing for explaining the female terminal part 210 of Embodiment 2. The structure of the first restricting part in Embodiment 2 is different from that in Embodiment 1. Other structures are the same as those in Embodiment 1, and detailed description thereof is omitted.
[0073] As Figure 10 shown, in the female terminal part 210, a first restricting part 231 is provided at the upper edge part of the right rear opening 26. The first restricting part 231 is bent from the upper edge part of the right rear opening 26 toward the inside of the main body part 20. The first restricting part 231 is bent in a manner inclined with respect to the plate surface of the right side plate 23. In the free state (natural state) where the elastic contact piece 40 has no elastic deflection, the upper surface of the free end part 42 is located at a non-contact position slightly below the first restricting part 231. At this time, the right protruding part 47 on the right side in the free end part 42 and the part (the part adjacent to the right protruding part 47 on the right side) on the inner side in the left - right direction of the right protruding part 47 on the right side are opposed to the first restricting part 231 in the up - down direction.
[0074] As Figure 11 shown, the left - hand part of the tip of the first restricting part 231 may also be rounded (surface - finished) to be chamfered. As Figure 12 shown, the first restricting part 331 may also be formed by knocking a part of the right side plate 23 inward.
[0075] [Embodiment 3]
[0076] Figure 13 、 Figure 14 It is a drawing for explaining the female terminal part 310 of Embodiment 3. The structures of the free end part 42 and the second restricting part 432 of the elastic contact piece 40 in Embodiment 3 are different from those in Embodiment 1. Other structures are the same as those in Embodiment 1, and detailed description thereof is omitted.
[0077] like Figure 13 , Figure 14 As shown, the second limiting part 432 is formed by the portion of the base plate 21 corresponding to the right rear opening 26 (the portion that overlaps with the right rear opening 26 in the left-right direction). In the elastic contact piece 40, the free ends 442 of a pair of right-side protrusions 447 are bent in a downward convex manner.
[0078] The first limiting part 31 and the second limiting part 432 come into contact with the elastic contact piece 40, limiting the displacement range of the free end 442 side of the elastic contact piece 40 to less than the thickness of the elastic contact piece 40. That is, when the free end 442 of the elastic contact piece 40 changes between a state of contact with the first limiting part 31 and a state of contact with the second limiting part 432 (when displacing in the vertical direction), it is displaced by a distance less than the thickness of the elastic contact piece 40.
[0079] like Figure 14 As shown, the vertical length of the gap between the first limiting part 31 and the free end 442 (right protrusion 447) is L41 in the foremost part (the portion along the leading edge of the right protrusion 447), L42 in the middle part (the central portion between the front and rear of the right protrusion 447), and L43 in the rearmost part (the portion along the trailing edge of the right protrusion 447). Each length (L41, L42, L43) of the gap between the first limiting part 31 and the free end 442 (right protrusion 447) is less than the plate thickness L4 of the elastic contact piece 40.
[0080] [Other Embodiments]
[0081] This invention is not limited to the embodiments 1 to 3 described above and illustrated in the drawings, but is shown through the claims. This invention includes all modifications equivalent to the claims and within the scope of the claims, as well as the embodiments described below.
[0082] In the above embodiment 1, the first limiting part 31 and the second limiting part 32 are structures that limit the displacement range of the free end 42 side of the elastic contact piece 40 to less than the thickness of the elastic contact piece 40. However, the first limiting part 31 and the second limiting part 32 may also be structures that limit the displacement range of the free end 42 side of the elastic contact piece 40 to less than half the thickness of the elastic contact piece 40.
[0083] Explanation of reference numerals in the attached figures
[0084] 10, 210, 310: Female terminal parts
[0085] 20: Main body
[0086] 21: Base Plate
[0087] 21A: Spear-type hole
[0088] 21B: Protrusion
[0089] 22: Left side panel
[0090] 23: Right side panel (side plate)
[0091] 24: Top Slab
[0092] 24A: Front locking plate
[0093] 24B: Right-side locking plate
[0094] 24C: Notch
[0095] 24D: Protrusion Receiving Section
[0096] 24E: The lamina enters the space.
[0097] 25: Right front opening
[0098] 26: Right rear opening (opening)
[0099] 31, 231, 331: First Restriction Section (Restriction Section)
[0100] 32, 432: Second Restriction Section (Restriction Section)
[0101] 40: Flexible contact piece
[0102] 41: Fulcrum (Bending Point)
[0103] 42, 442: Free ends
[0104] 44: Extension
[0105] 44A: Forward tilt
[0106] 44B: Rearward section
[0107] 45: Contact section
[0108] 46: Front protrusion (protrusion)
[0109] 47, 447: Right side protrusion (protrusion)
[0110] 50: Wire connection part
[0111] 110: Male terminal component
[0112] 120: Yangtu tablets
Claims
1. A female terminal component, comprising: a cylindrical body; and An elastic contact piece extends from the fulcrum portion toward the free end inside the main body portion and contacts the male protrusion piece inserted into the opposite side of the main body portion. The free end of the elastic contact piece is displaced in the thickness direction of the elastic contact piece. The main body portion has: The limiting part contacts the elastic contact piece, limiting the displacement range of the free end side to below the thickness of the elastic contact piece; Base plate; and Side panels, rising from the base plate, The limiting portion includes: a first limiting portion disposed on the upright side of the side plate, bent inward toward the main body in an inclined manner relative to the surface of the side plate; and a second limiting portion disposed on the side opposite to the first limiting portion, separated from the free end. The second limiting part protrudes from the base plate.
2. The female terminal component according to claim 1, wherein, The elastic contact piece has a protrusion extending from the free end side in the width direction. The side plate has an opening. The protruding part is located inside the opening. The edge of the opening constitutes the limiting portion.
3. The female terminal component according to claim 1 or claim 2, wherein, The distance between the first limiting part and the free end is greater than the distance between the second limiting part and the free end.
4. The female terminal component according to claim 1 or claim 2, wherein, The elastic contact piece has a contact portion that contacts the male protrusion piece. The distance from the fulcrum to the contact point is less than the distance from the contact point to the free end.