JP2015185243A - Tuning-fork terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tuning-fork terminal with a novel structure which can reduce a projection height from a support position on a printed circuit board or the like, while ensuring spring properties of a pressure-contact part.SOLUTION: A tuning-fork terminal 10 has, on one end in the lengthwise direction, a slot 22 into which a mating tab terminal 46 is inserted. The tuning-fork terminal 10 also comprises a pair of pressure-contact parts 26, 26. The pressure-contact parts 26, 26 project inward in a facing direction from facing end surfaces 25, 25 of a pair of pressure-contact pieces 24, 24 defining the slot 22 so as to be brought into pressure-contact with the tab terminal 46. At least one of the pair of pressure-contact parts 26, 26 is provided with a deformation allowable part 32 at a portion spaced apart outward of the facing direction from an inner edge part 28 in the facing direction. The inner edge part 28 can be elastically deformed to the deformation allowable part 32 side.

Description

  The present invention relates to a tuning fork terminal which has a slot into which a mating tab terminal is inserted, and which has a pressure contact portion pressed against the tab terminal on the opposite end face of the slot.

  Conventionally, as a terminal electrically connected to a tab terminal such as a relay or a fuse, a tuning fork terminal in which a slot for press-fitting the tab terminal from the tip is cut is widely used. For example, those described in Japanese Patent Application Laid-Open No. 2003-217437 (Patent Document 1). As shown in FIGS. 11 and 12, the tuning fork terminal 1 includes a U-shaped slot 2 opened at one end in the length direction, and a pair of press-contacts forming the slot 2 at the tip of the slot 2. The pressure contact portions 4 and 4 project inward in the opposite direction from the opposite end surfaces of the piece portions 3 and 3. For example, as shown in FIG. 13, when connecting the fuse 5 and the conductor of the printed circuit board 6 via the tuning fork terminal 1, the lead portion 7 provided on the other end side in the length direction of the tuning fork terminal 1. , 7 are inserted into the through holes 8 of the printed circuit board 6 and soldered, whereby the tuning fork terminal 1 is erected on the printed circuit board 6 and soldered to the conductor. Then, the tab terminal 9 of the fuse 5 is inserted into the slot 2 of the tuning fork terminal 1, and the pressure contact portions 4, 4 are pressed from both sides of the tab terminal 9, whereby the fuse 5 is connected to the conductor of the printed circuit board 6 via the tuning fork terminal 1. And is electrically connected.

  By the way, in the tuning fork terminal 1 having such a conventional structure, the tab terminal 9 can be inserted into the slot 2 and the pressure contact force to the pressure contact portions 4 and 4 to the tab terminal 9 can be reliably obtained. It is necessary to ensure the spring property that the pressure contact portions 4 and 4 bend and deform outward in the facing direction and elastically return inward in the facing direction. For this reason, in the tuning fork terminal 1, the projecting dimensions of the pressure contact piece portions 3, 3 from the bottom surface of the slot 2 are ensured to be large, and the pressure contact piece portions 3, 3 are allowed to bend outwardly in the opposing direction. Ensuring the spring property of the parts 4 and 4 is performed.

  However, in the tuning fork terminal 1, the spring properties of the pressure contact portions 4, 4 depend on the protruding dimension L 2 of the pressure contact piece portions 3, 3 from the bottom surface of the slot 2. There are limits to reducing the dimensions. Therefore, it is structurally difficult to make the height D1 of the tuning fork terminal 1 protruding from the support position of the printed circuit board 6 or the like sufficiently small, and it can sufficiently meet the recent demand for miniaturization and space saving. The problem of being unable to do so was inherent.

JP 2003-217437 A

  An object of the present invention is to provide a tuning fork terminal having a novel structure capable of reducing the protruding height from a supporting position of a printed circuit board or the like while ensuring the spring property of the press contact portion.

  The first aspect of the present invention has a slot into which the mating tab terminal is inserted at one end in the length direction, and protrudes inward in the facing direction from the facing end surfaces of the pair of press contact pieces defining the slot. In the tuning fork terminal comprising a pair of pressure contact portions pressed against the tab terminal, at least one of the pair of pressure contact portions is spaced outward from the inner edge portion in the opposite direction to the outer side in the opposite direction. The part is provided with a deformation allowing part, and the inner edge part can be elastically deformed toward the deformation allowing part.

  According to the tuning fork terminal of this aspect, the deformation allowing portion is provided at a portion spaced outward from the inner edge of the pair of pressure contacting portions, and the pressure contacting portion is formed by elastic deformation of the inner edge toward the deformation allowing portion. The spring property is ensured. Accordingly, the spring property of the press contact portion can be set without depending on the projecting dimension from the bottom surface of the slot of the press contact piece portion defining the slot, and the spring property of the press contact portion is ensured while ensuring the spring property of the press contact piece portion. The protruding dimension, that is, the protruding dimension from the support position of the tuning fork terminal can be reduced. Therefore, it is possible to advantageously provide a tuning fork terminal in which the projecting dimension of the press contact piece portion that can meet the demands for miniaturization and space saving is small and the spring property of the press contact portion is ensured.

  In addition, the tuning fork terminal of this aspect is applicable to a wire for which a wire or the like is crimped via a relay terminal or the like in addition to a tuning fork terminal for a substrate whose other end in the length direction is connected to a conductor of a printed circuit board. Can do. Further, the specific shape of the deformation-permitting portion is not limited, but, for example, a void formed by press punching a portion separated outward from the inner edge of the pair of press contact portions within a predetermined range, or such a space It can be constituted by a thin-film plate-like portion in which the thickness of the part is made thinner than other parts.

  A second aspect of the present invention is the one described in the first aspect, wherein the deformation allowing portion is constituted by a void.

  According to this aspect, since the deformation allowing portion is constituted by the void, the portion separated outward from the inner edge of the pair of press contact portions is subjected to a simple manufacturing process in which press punching is performed within a predetermined range. Since it can be formed easily, the manufacturing efficiency of the tuning fork terminal can be improved.

  A third aspect of the present invention is the one described in the first aspect, wherein the deformation allowing portion is provided in each of the pair of press contact portions.

  According to this aspect, since the deformation allowing portion is provided in both of the pair of press contact portions, the amount of elastic deformation of the pair of press contact portions when the tab terminal is press-fitted can be made uniform. Can be inserted more smoothly.

  According to a fourth aspect of the present invention, in the second or third aspect, the deformation allowing portion is formed by a through-hole penetrating the pressure contact portion in the plate thickness direction.

  According to this aspect, the deformation allowing portion can be easily provided in the press contact portion, and both end portions of the inner edge portion are connected to the press contact piece portion, so that the rigidity and durability of the press contact portion are ensured. be able to. Therefore, it can be provided as a tuning fork terminal advantageous for connection with a tab terminal having a relatively large pressure input.

  According to a fifth aspect of the present invention, in the above-described fourth aspect, the through hole opens in a part of the inner edge.

  According to this aspect, since the through-hole is opened in a part of the inner edge portion, the inner edge portion can be configured in a cantilever shape in which one end portion is separated from the pressure contact piece portion. . Therefore, the inner edge portion can be more easily bent toward the deformation allowing portion side, and the insertion force of the tab terminal into the slot can be reduced.

  According to a sixth aspect of the present invention, in the one described in any one of the first to fifth aspects, an outward displacement in the facing direction is suppressed at the distal ends of the pair of pressure contact pieces. The pair of tab terminal guide portions are formed, and the pair of press contact portions are provided closer to the base end side of the press contact piece portion than the tab terminal guide portion.

  According to this aspect, the tab terminal is positioned with respect to the slot instead of the press contact portion at the tip end portion of the press contact piece portion by utilizing the characteristic that the spring property of the press contact portion does not depend on the protruding dimension of the press contact piece portion. It is possible to provide a tab terminal guide portion for guiding. Therefore, in the conventional tuning fork terminal, it is necessary to provide a guide part for guiding the tab terminal with respect to the slot in a separate member such as a receiving part of the tuning fork terminal. It is possible to provide a portion, and it is possible to reduce the number of parts and the manufacturing cost.

  In addition, since the distal end portion of the pressure contact piece does not need to bend and deform outward in the facing direction, the displacement of the distal end portion of the pressure contacting piece portion, that is, the tab terminal guide portion in the facing direction outward is suppressed. Therefore, it is possible to advantageously improve the guide accuracy and durability of the tab terminal by the tab terminal guide portion.

  According to a seventh aspect of the present invention, in the one according to any one of the first to sixth aspects, in the length direction, the bottom portion of the slot and the maximum inward portion of the pressure contact portion in the facing direction. The distance L1 is set to 80% or less of the distance L2 between the bottom surface of the slot and the tip surface of the pressure contact piece.

  According to this aspect, since the spring property of the press contact portion is ensured by elastic deformation of the inner edge portion of the press contact portion toward the deformation allowable portion side, depending on the length of the press contact piece portion as in the conventional structure. Compared with the case where it exists, the position of a press-contact part can be spaced apart below the front-end | tip part of a press-contact piece part. Therefore, compared with the case where the pressure contact portion is provided at the tip portion, the interference between the pressure contact portion and other members can be prevented in advance, and the initial set state of the pressure contact portion can be stably maintained.

  According to an eighth aspect of the present invention, in the one described in any one of the first to seventh aspects, the other end portion in the length direction includes a placement portion on the printed circuit board, and the placement portion. A lead portion that is protruded from the portion and inserted into the through-hole of the printed circuit board and soldered is provided, and in the length direction, the protruding dimension of the pressure contact piece portion from the placement portion is D1; Projection dimension of the lead part from the placement part: 2.5 times or less of D2.

  In this embodiment, the present invention is applied to a tuning fork terminal for a board that is inserted into a through hole of a printed board and soldered. In the present invention in which the spring property of the pressure contact portion is ensured by elastic deformation of the inner edge portion of the pressure contact portion toward the deformation allowable portion side, depending on the length of the pressure contact piece portion as in the conventional structure In comparison with the above, the projecting dimension of the pressure contact piece part can be made smaller than the projecting dimension of the lead part inserted through the through hole. Therefore, the protruding height of the tuning fork terminal from the printed circuit board can be reduced, and the height and size of the electrical components incorporating the tuning fork terminal and the printed circuit board can be reduced.

  According to a ninth aspect of the present invention, in the one described in any one of the first to eighth aspects, the pair of press contact piece portions and the deformation allowing portion that are punched symmetrically with respect to a center line are provided. The flat plate member including the pair of press contact portions is bent by the center line in the thickness direction and formed by a double wall member.

  According to this aspect, the tuning fork terminal is formed by the double wall member in which the flat plate members punched symmetrically with respect to the center line are folded in the thickness direction about the center axis and overlapped. Therefore, it is possible to stably form a void or the like that is difficult to punch due to an increase in the plate thickness, and to improve the dimensional accuracy of the tuning fork terminal.

  In the tuning fork terminal of the present invention, a deformation allowing portion is provided at a portion spaced outward from the inner edge portion of the pair of pressure contact portions, and by the elastic deformation of the inner edge portion toward the deformation allowing portion side, Spring property is secured. Therefore, since the spring property of the press contact portion can be set without depending on the projecting dimension of the press contact piece portion, the projecting size of the press contact piece portion, that is, the projecting size from the tuning fork terminal support position can be reduced. As a result, it is possible to advantageously provide a tuning fork terminal in which the protrusion size of the pressure contact piece portion is small and the spring property of the pressure contact portion is ensured, which can meet demands for miniaturization and space saving.

The perspective view of the tuning fork terminal as 1st embodiment of this invention. The front view of the tuning fork terminal shown in FIG. FIG. 2 is a perspective view showing a state in which a fuse and a conductor of a printed board are connected via the tuning fork terminal shown in FIG. 1. The perspective view of the tuning fork terminal as 2nd embodiment of this invention. The front view of the tuning fork terminal shown in FIG. The front view of the tuning fork terminal as 3rd embodiment of this invention. The front view of the tuning fork terminal as 4th embodiment of this invention. The perspective view of the tuning fork terminal as 5th embodiment of this invention. The front view of the tuning fork terminal shown in FIG. FIG. 9 is a development view for explaining a method of manufacturing the tuning fork terminal shown in FIG. 8 ((a) after stamping, (b) after overlapping). The perspective view for demonstrating the tuning fork terminal according to the conventional structure. The front view of the tuning fork terminal shown in FIG. FIG. 12 is a perspective view showing the tuning fork terminal shown in FIG. 11 and a state in which the fuse and the conductor of the printed circuit board are connected via the tuning fork terminal.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG.1 and FIG.2 shows the tuning fork terminal 10 as 1st embodiment of this invention. In the following description, the length direction and the vertical direction refer to the vertical direction in FIG. 2, and the width direction refers to the horizontal direction in FIG. The plate thickness direction is a direction perpendicular to the paper surface in FIG.

  The tuning fork terminal 10 is formed, for example, by stamping and bending a metal plate having a surface such as a copper plate plated with tin. A connecting portion 14 is formed at one end 12 in the length direction of the tuning fork terminal 10, and a pair of lead portions 18 and 18 and a mounting portion 20 are formed at the other end 16. Here, the mounting portion 20 is provided between the connection portion 14 and the pair of lead portions 18 and 18 and is formed to protrude in the plate thickness direction of the connection portion 14. As a result, the tuning fork terminal 10 as a whole has a crank shape in which the connection portion 14 and the pair of lead portions 18, 18 protrude in opposite directions from both end edges of the mounting portion 20.

  The connecting portion 14 includes a substantially U-shaped slot 22 opened at one end in the length direction. The slot 22 is defined by opposed end surfaces 25 and 25 of a pair of substantially rectangular pressure contact pieces 24 and 24. On the tip end side of the slot 22, there are a pair of substantially semicircular pressure contact portions 26, 26 protruding inward in the opposing direction from the opposing end surfaces 25, 25 of the pressure contact piece portions 24, 24. Further, the pair of press contact portions 26, 26 has a substantially semicircular cross-sectional shape penetrating each press contact portion 26 in the plate thickness direction at a portion spaced outward from the inner edge portion 28 in the opposing direction. Each of the holes 30 is provided, and the through hole 30 forms a void 32 as a deformation allowing portion. As a result, since the inner edge portion 28 has a narrow, substantially arc-shaped flat plate shape, the inner edge portion 28 can be elastically deformed toward the cavity 32 side.

  On the other hand, the mounting portion 20 protrudes in one side of the connecting portion 14 in the plate thickness direction (the front side direction perpendicular to the paper surface in FIG. 2) and the protruding direction of the connecting portion 14 (up and down direction in FIG. 2). It is made into the substantially rectangular flat plate shape extended orthogonally. The mounting portion 20 is formed over the entire width direction of the tuning fork terminal 10.

  A pair of lead portions 18 and 18 are formed on the end portion of the mounting portion 20 opposite to the connection portion 14. The pair of lead portions 18, 18 are formed by connecting the projecting pieces protruding in the plate thickness direction of the connection portion 14 from both edge portions in the width direction of the mounting portion 20 toward the lower side to be bent at a substantially right angle. 14 is formed with a narrow protruding piece shape protruding in the direction opposite to the protruding direction of 14.

  In the tuning fork terminal 10 having such a structure, as shown in FIG. 2, the distance between the bottom surface 34 of the slot 22 and the maximum inner portion 36 in the opposing direction of the press contact portion 26 in the length direction: L1 is desirably set to 80% or less, more preferably 70% or less of the separation distance L2 between the bottom surface 34 of the slot 22 and the tip surface 38 of the pressure contact piece 24. In the present embodiment, the separation distance L1 between the bottom surface 34 of the slot 22 and the maximum inward portion 36 of the pressure contact portion 26 is the separation distance L2 between the bottom surface 34 of the slot 22 and the front end surface 38 of the pressure contact piece portion 24. Of about 65%.

  Further, the projecting dimension D1 of the pressure contact piece 24 from the mounting part 20 in the length direction is 2.5 times or less of the projecting dimension D2 of the lead part 18 from the mounting part 20, more preferably 2. It is desirable to be 3 times or less. In the present embodiment, the protruding dimension D1 of the pressure contact piece 24 from the mounting part 20 is about 2.1 times the protruding dimension D2 of the lead part 18 from the mounting part 20.

  The tuning fork terminal 10 having such a structure is soldered to the printed circuit board 40 with a pair of tuning fork terminals 10 and 10 facing each other as shown in FIG. It can be attached. The tuning fork terminal 10 has a pair of lead portions 18 and 18 inserted through the through holes 42 and 42 of the printed circuit board 40 and soldered, so that the mounting portion 20 is mounted on the surface of the printed circuit board 40 and connected. 14 protrudes on the printed circuit board 40 and is electrically connected to a printed wiring (not shown) formed on the printed circuit board 40.

  For example, a fuse 44 can be connected to the pair of tuning fork terminals 10 and 10. The fuse 44 is inserted into the slot 22 of the tuning fork terminal 10 with the tab terminal 46 as a counterpart terminal. The tab terminal 46 is connected to the tuning fork terminal 10 by being pressed against the pair of press contact portions 26, 26. As a result, the fuse 44 is electrically connected to the printed wiring (not shown) of the printed circuit board 40 via the tuning fork terminal 10.

  According to the tuning fork terminal 10 having such a structure, the pair of press contact portions 26, 26 are each provided with a through hole 30, and a void 32 is formed by the through hole 30. Thereby, since the inner edge part 28 of the opposing direction of a pair of press contact parts 26 and 26 can be made narrow, it becomes possible to elastically deform this inner edge part 28 to the space 32 side. Yes. Therefore, the spring property of the pressure contact portion 4 is not secured by the projecting dimension L2 from the bottom surface 34 of the slot 2 of the pressure contact piece portion 3 that defines the slot 2 as in the conventional structure, but the inside of the pressure contact portion 26. This can be ensured by elastic deformation of the edge portion 28 toward the void 32. Therefore, since the projecting dimension L2 from the bottom surface 34 of the slot 2 of the pressure contact piece 3 can be reduced, the tuning fork terminal 10 that can meet the demands for miniaturization and space saving can be advantageously provided. .

  In addition, since the void 32 is provided in both of the pair of press contact portions 26, 26, the elasticity of the inner edge portion 28 of the pair of press contact portions 26, 26 when the mating tab terminal 46 is press-fitted. The amount of deformation can be made uniform, and the tab terminal 46 can be inserted more smoothly. Further, since the void 32 is formed by the through hole 30, both end portions of the inner edge portion 28 are connected to the pressure contact piece portion 24, so that the rigidity and durability of the inner edge portion 28 of the pressure contact portion 26 are increased. Therefore, the tuning fork terminal 10 can be provided which is advantageous for connection to the tab terminal 46 having a relatively large pressure input.

  Moreover, in the tuning fork terminal 10, the spring property of the pressure contact portion 26 is ensured by elastic deformation of the inner edge portion 28 of the pressure contact portion 26 toward the space 32, and therefore, the bottom surface of the slot 22 in the length direction. The distance L1 between the bottom 34 of the slot 22 and the maximum inner portion 36 in the opposing direction of the pressure contact portion 26 is set to 80% or less of the distance L2 between the bottom surface 34 of the slot 22 and the front end surface 38 of the pressure contact piece 24. Yes (in this embodiment, about 65%). Therefore, as compared with the case where the spring property of the press contact portion 26 is secured by the projecting dimension L2 from the bottom surface of the slot 2 of the press contact piece 3 as in the conventional structure, the position of the press contact portion 26 is set to the press contact piece portion. It can be spaced downward from the tip of 24. Therefore, compared with the case where the pressure contact portion 4 is provided at the tip as in the conventional structure, the interference between the pressure contact portion 26 and other members can be prevented, and the initial setting state of the pressure contact portion 26 can be stabilized. Can be held.

  In addition, since the spring property of the pressure contact portion 26 is ensured by elastic deformation of the inner edge portion 28 of the pressure contact portion 26 toward the space 32, the pressure contact piece portion from the mounting portion 20 in the length direction. The projecting dimension of 24: D1 can be set to 2.5 times or less of the projecting dimension of the lead part 18 from the mounting part 20: D2. That is, in the tuning fork terminal 1 having the conventional structure shown in FIGS. 11 to 13, the protruding dimension D1 of the pressure contact piece 3 from the mounting portion is 3.6 times the protruding dimension D2 of the lead portion 7 from the mounting portion. The tuning fork terminal 10 of this embodiment shown in FIGS. 1 to 3 can be reduced to 2.5 times or less, so that the projection height D1 of the tuning fork terminal 10 from the printed circuit board 40 is compared with the conventional structure. Can be made smaller. As a result, it is possible to reduce the height and size of an electrical component (not shown) that incorporates the tuning fork terminal 10 and the printed circuit board 40.

  Next, the tuning fork terminal 50 according to the second embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5. The members and parts having the same structure as that of the above embodiment are shown in FIG. The same reference numerals as those in the above embodiment are attached, and detailed description thereof is omitted. The tuning fork terminal 50 is different from the first embodiment in that the mounting portion 20 is not provided. That is, the tuning fork terminal 50 according to this embodiment includes a connection portion 14 and a pair of lead portions 18 and 18 projecting outward in the length direction from the base end portion of the connection portion 14. Therefore, in this embodiment, the tuning fork terminal 50 can be formed only by press punching of a metal plate, and the bending process after the press punching process can be made unnecessary, so that the manufacturing cost can be reduced. In addition, since only the mounting portion 20 is eliminated from the above-described embodiment, the spring property of the pressure contact portion 26 is made to move toward the void 32 of the inner edge portion 28 of the pressure contact portion 26 as in the first embodiment. It can be ensured by elastic deformation, and the same effect as in the first embodiment can be obtained. In the second embodiment, the projecting dimension D1 of the pressure contact piece 24 from the mounting part 20 is approximately 2.2 times the projecting dimension D2 of the lead part 18 from the mounting part 20 and is a slot. The distance L1 between the bottom surface 34 of 22 and the maximum inner portion 36 in the opposing direction of the pressure contact portion 26 is about 65% of the distance L2 between the bottom surface 34 of the slot 22 and the front end surface 38 of the pressure contact piece portion 24. Has been.

  FIG. 6 shows a tuning fork terminal 52 as a third embodiment of the present invention. The tuning fork terminal 52 is different from the second embodiment only in that the void 32 is formed only in one of the pair of press contact portions 26, 26. As described above, even if the space 32 is formed only in one of the pair of pressure contact portions 26, 26, the spring property of the pressure contact portion 26 is made to be similar to that of the inner edge portion 28 of the pressure contact portion 26. It can be ensured by elastic deformation toward the void 32 side. Thereby, the spring property required for the press contact portion 26 can be advantageously ensured while suppressing the projecting dimension of the press contact piece portion 24 from the bottom surface 34 of the slot 22. Therefore, it is possible to obtain the same effect as in the second embodiment except for the effect of improving the ease of inserting the tab terminal 46 due to the formation of the void 32 in both of the pair of press contact portions 26, 26. it can.

  Next, the tuning fork terminal 54 according to the fourth embodiment of the present invention will be described in detail with reference to FIG. 7, but members and parts having the same structure as those of the first to third embodiments are illustrated in FIG. In the drawings, the same reference numerals as those in the above embodiment are attached, and detailed description thereof is omitted. In such a tuning fork terminal 54, an embodiment different from the second embodiment is that the upper end portion of the through hole 30 is open toward the opposing direction of the press contact portion 56 at a part of the inner edge portion 28. Is shown. That is, in the tuning fork terminal 54 of the present embodiment, since the upper end portion of the through hole 30 opens in a part of the inner edge portion 28, the inner edge portion 28 is connected to one end portion thereof (the upper end portion in FIG. 7). Part) can be cantilevered from the pressure contact piece 24. Accordingly, the inner edge portion 28 can be more easily bent toward the space 32, so that the insertion force of the tab terminal 46 into the slot 22 can be reduced. Further, a substantially circular stopper portion 58 is provided at one end portion of the inner edge portion 28 separated from the pressure contact piece portion 24, and the outer peripheral surface of the stopper portion 58 is the inner peripheral surface of the through hole 30. By abutting, excessive deformation of the inner edge portion 28 due to insertion of the tab terminal 46 into the slot 22 is prevented. In the present embodiment, the inner edge portion 28 can be easily bent by separating one end portion of the inner edge portion 28 from the press contact piece portion 24, and the same effect as that of the second embodiment described above is obtained. be able to.

  In addition, in the tuning fork terminal 54 of the present embodiment, the inner edge portion 28 is formed in a cantilever shape by separating the upper end portion of the inner edge portion 28 from the pressure contact piece portion 24, so It is not necessary to give the distal end portion of the pressure contact piece portion 24 positioned above the separation end portion of the edge portion 28 to have a spring property. Therefore, a pair of tab terminal guide portions 60, 60 are formed at the distal end portions of the pair of pressure contact piece portions 24, 24 while ensuring rigidity. That is, the tab terminal guide portion 60 is configured to suppress the outward displacement in the facing direction as compared with the inner edge portion 28 of the press contact portion 56. The pressure contact portion 56 is provided closer to the proximal end side of the pressure contact piece portion 24 than the tab terminal guide portion 60. Accordingly, when the mating tab terminal 46 is connected to the tuning fork terminal 54, the elastic deformation of the tab terminal 46 is suppressed, and the tab terminal guide portion 60 comes into contact with the relatively rigid tab terminal guide 60 and is reliably guided to the normal position. . Accordingly, it is possible to advantageously improve the guide accuracy of the tab terminal 46 by the tab terminal guide portion 60 and the durability of the tuning fork terminal 54 itself. In addition, since it is possible to provide the tab terminal guide portion 60 for positioning and guiding the tab terminal 46 with respect to the slot 22 by using the distal end portion of the pressure contact piece portion 24, the conventional tab terminal guide portion can be provided. Compared with the case of providing it in a separate member, it is possible to reduce the number of parts and the manufacturing cost. In the fourth embodiment, the projecting dimension D1 of the pressure contact piece 24 from the mounting part 20 is about 2.2 times the projecting dimension D2 of the lead part 18 from the mounting part 20 and is a slot. The distance L1 between the bottom surface 34 of 22 and the maximum inner portion 36 in the opposing direction of the pressure contact portion 26 is about 65% of the distance L2 between the bottom surface 34 of the slot 22 and the front end surface 38 of the pressure contact piece portion 24. Has been.

  Furthermore, although the tuning fork terminal 62 as the fifth embodiment of the present invention will be described in detail with reference to FIGS. 8 to 10, the members and parts having the same structure as the above embodiment are described above in the drawing. By attaching the same reference numerals as those of the embodiment, detailed description thereof will be omitted. The tuning fork terminal 62 is different from the first to fourth embodiments in that it is first formed by the double wall member 64. That is, when the tuning fork terminal 62 of this embodiment is formed, as shown in FIG. 10A, first, a metal plate having a surface of a copper plate or the like plated with tin or the like is press-punched. Thus, the flat plate member 66 is formed. The flat plate member 66 includes a pair of press contact pieces 24, 24 punched symmetrically with a center line C interposed therebetween, a pair of press contact portions 68, 68 having cavities 32, 32, a pair of lead portions 18, 18 is comprised. Subsequently, as shown in FIG. 10B, the double-wall member 64 is formed by folding the flat plate member 66 along the center line: C in the plate thickness direction and overlapping it. Finally, the discard plate part 70 is cut off, and the tuning fork terminal 62 constituted by the double wall member 64 is completed.

  According to the tuning fork terminal 62 of the present embodiment, the flat wall member 66 is constituted by the double wall member 64 in which the flat plate member 66 is bent in the thickness direction along the center line C and overlapped. Therefore, it is possible to stably form the cavities 32 and the like, which are difficult to punch by increasing the plate thickness, so that the dimensional accuracy of the tuning fork terminal 62 can be improved. Further, in the present embodiment, similar to the fourth embodiment, the through hole 30 is common in that a part of the inner edge portion 28 is opened toward the pressure contact portion 56. Are different in that the lower end of each of them is open to a part of the inner edge 28. Accordingly, the inner edge portion 28 can be cantilevered at one end portion (the lower end portion in FIG. 9) from the pressure contact piece portion 24, and the inner edge portion 28 is the same as in the fourth embodiment. Can be more easily bent toward the void 32 side. In addition, since the base end side of the inner edge portion 28 can be a bent portion of the center line C of the double wall member 64, the durability of the cantilevered inner edge portion 28 is advantageously ensured. Can do. In the fifth embodiment, the projecting dimension D1 of the pressure contact piece 24 from the mounting part 20 is about 2.3 times the projecting dimension D2 of the lead part 18 from the mounting part 20, and the slot The distance L1 between the bottom surface 34 of 22 and the maximum inner portion 36 in the opposing direction of the pressure contact portion 26 is about 62% of the distance L2 between the bottom surface 34 of the slot 22 and the tip surface 38 of the pressure contact piece portion 24. is there.

  As mentioned above, although several embodiment of this invention was explained in full detail, this invention is not limited by these specific description. For example, the tuning fork terminals 10, 50, 52, 54, 62 in the above-described embodiment are the tuning fork terminals for a board in which the other end 16 in the length direction is connected to the printed wiring of the printed board 40. In addition, the present invention can also be applied to a case where an electric wire or the like is crimped via a relay terminal or the like. In addition to the semicircular shape, an arbitrary shape such as an elliptical shape or a circular shape can be selected as the shape of the void 32. In addition, in the above-described embodiment, the upper end portion or the lower end portion of the through hole 30 is opened to a part of the inner edge portion 28, but the central portion of the through hole 30 is a part of the inner edge portion 28. It may be opened.

  Further, in the above-described embodiment, the deformation allowing portion is configured by the void 32. For example, the plate thickness dimension of the portion spaced outward from the inner edge portion 28 of the pair of press contact portions 26, 56, 68 is used. May be constituted by a thin-film plate-like portion made thinner than other portions.

10, 50, 52, 54, 62: tuning fork terminal, 16: other end portion, 18: lead portion, 20: placement portion, 22: slot, 24: pressure contact piece portion, 25: opposite end face, 26, 56, 68 : Pressure contact part, 28: inner edge part, 30: through hole, 32: void (deformation allowable part), 34: bottom face, 36: maximum inner part, 38: tip face, 40: printed circuit board, 42: through Hall: 46: Tab terminal, 60: Tab terminal guide part, 64: Double wall member, 66: Flat plate member

Claims (9)

A pair having a slot into which the mating tab terminal is inserted at one end in the length direction, and projecting inward in the opposing direction from the opposing end surfaces of the pair of press contact pieces defining the slot, and being in pressure contact with the tab terminal In the tuning fork terminal provided with the pressure contact part,
At least one of the pair of pressure contact portions is provided with a deformation allowance portion at a portion spaced outward from the inner edge portion in the facing direction to the outer side in the facing direction, and the inner edge portion is the deformation allowance portion. A tuning fork terminal characterized in that it can be elastically deformed to the side.   The tuning fork terminal according to claim 1, wherein the deformation allowing portion is constituted by a void.   The tuning fork terminal according to claim 1, wherein the deformation allowing portion is provided in each of the pair of press contact portions.   4. The tuning fork terminal according to claim 2, wherein the void is formed by a through-hole penetrating the press-contact portion in a plate thickness direction.   The tuning fork terminal according to claim 4, wherein the through hole is opened in a part of the inner edge.   A pair of tab terminal guide portions in which the outward displacement in the facing direction is suppressed are formed at the distal end portions of the pair of pressure contact piece portions, and the pressure contact piece portions are located more than the tab terminal guide portions. The tuning fork terminal according to any one of claims 1 to 5, wherein the pair of press contact portions are provided on a base end side.   In the length direction, a separation distance L1 between the bottom surface of the slot and the maximum inward portion of the pressure contact portion in the opposing direction is a separation distance L2 between the bottom surface of the slot and the front end surface of the pressure contact piece portion. The tuning fork terminal according to any one of claims 1 to 6, wherein the tuning fork terminal is set to 80% or less.   The other end in the length direction is provided with a placement part on the printed circuit board, and a lead part that protrudes from the placement part and is inserted into the through hole of the printed circuit board and soldered, The protrusion dimension: D1 of the pressure contact piece part from the mounting part in the length direction is 2.5 times or less of the projecting dimension of the lead part from the mounting part: D2. Tuning fork terminal given in any 1 paragraph of -7.   A double plate in which the pair of press contact pieces punched symmetrically across the center line and the flat plate member including the pair of press contact parts having the space are folded and overlapped in the thickness direction at the center line The tuning fork terminal according to any one of claims 1 to 8, wherein the tuning fork terminal is formed by a wall member.

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