Connector

Abstract

To provide a connector capable of being preferably fixed by a solder.SOLUTION: A connector 10 comprises a fixing part 27E that is inserted into a rectangular through hole H formed on a circuit board P, and is fixed to the circuit board P by using a solder. The fixing part 27E contains: a first insertion part 27G; and a second insertion part 27H. The first insertion part 27G includes: a flexion part 27J that can be elastically deformed to a width direction of the through hole H, and is inserted into the through hole H; and a slip-off preventing part 27K that is projected to the width direction from the flexion part 27J in a tip end part of the flexion part 27J, and suppresses the flexion part 27J from falling from the through hole H. The second insertion part 27H is arranged so as to be paralleled to a depth direction orthogonal to the width direction to the first insertion part 27G in the through hole H. A second creepage A2 along an inner peripheral edge of the through hole H of the second insertion part 27H is larger than a first creepage A1 along an inner peripheral edge of the through hole H of the first insertion part 27G.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a connector.

Background Art

[0002] Patent Document 1 discloses a board connector that attaches a housing to a printed circuit board using snap-fit terminals. The snap-fit terminals have rod-shaped legs and wide locking portions formed at the tip ends of the legs. The snap-fit terminals are fixed to the printed circuit board by using solder after passing the locking portions through the through holes of the printed circuit board while temporarily elastically deforming the legs in the width direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in Patent Document 1, since the width dimension of the through hole needs to allow the locking portion of the snap-fit terminal to pass through, it is set larger than the width dimension of the leg. In such a case, when the tip end of the snap-fit terminal is passed through the through hole, a large gap is likely to occur unevenly between the leg and the inner surface of the through hole.

[0005] When soldering the tip end of the snap-fit terminal to the printed circuit board in such a state, it becomes difficult for the solder to flow into the large gap between the leg and the inner surface of the through hole, and the solder does not flow evenly on the outer surface of the snap-fit terminal, raising a concern that the snap-fit terminal cannot be properly fixed to the printed circuit board.

[0006] Furthermore, if a large gap occurs between the leg portion and the inner surface of the through hole, there is a risk that the snap-fit terminal may shift in the width direction within the through hole, making it difficult to determine the position of the snap-fit terminal with respect to the printed circuit board.

[0007] The connector of the first disclosure was completed based on the above circumstances, and an object thereof is to provide a connector that can be satisfactorily fixed by solder.

[0008] The connector of the second disclosure was completed based on the above circumstances, and an object thereof is to suppress displacement with respect to the circuit board.

Means for Solving the Problem

[0009] The connector of the first disclosure includes a fixing fitting that is inserted into a square through hole formed in a circuit board and fixed to the circuit board using solder. The fixing fitting has a first fitting that is elastically deformable in the width direction of the through hole and has a bent portion inserted into the through hole, and a retaining portion that protrudes from the bent portion in the width direction at the tip of the bent portion and suppresses the bent portion from coming out of the through hole; and includes a second fitting that is arranged in the depth direction perpendicular to the width direction with respect to the first fitting within the through hole. The second surface along the inner peripheral edge of the through hole of the second fitting is larger than the first surface along the inner peripheral edge of the through hole of the first fitting among the first fitting.

[0010] The connector of the second disclosure includes a fixing fitting that is inserted into a through hole formed in a circuit board. The fixing fitting It is elastically deformable in the width direction of the through hole, has a bent portion inserted into the through hole, and a retaining portion that protrudes from the bent portion to one side in the width direction at the tip of the bent portion and suppresses the bent portion from coming out of the through hole. A first fitting having: Including a second fitting arranged in the depth direction orthogonal to the width direction with respect to the first fitting in the through hole. The dimension in the width direction of the second fitting in the through hole is set to be larger than the dimension in the width direction of the first fitting in the through hole.

Advantages of the Invention

[0011] According to the first disclosure, it can be well fixed by solder. According to the second disclosure, displacement with respect to the circuit board can be well suppressed.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0013] [Description of Embodiments of the Present Disclosure] First, the embodiments of the present disclosure will be listed and described. The connector of the first disclosure (1) includes a fixing fitting that is inserted into a rectangular through hole formed in a circuit board and fixed to the circuit board using solder. The fixing fitting includes a first fitting and a second fitting. The first fitting is elastically deformable in the width direction of the through hole and has a bent portion that is inserted into the through hole, and a retaining portion that protrudes in the width direction from the bent portion at the tip of the bent portion and suppresses the bent portion from coming out of the through hole. The second fitting is arranged in the depth direction orthogonal to the width direction with respect to the first fitting within the through hole. The second surface along the inner peripheral edge of the through hole of the second fitting is larger than the first surface along the inner peripheral edge of the through hole of the first fitting. According to this configuration, in the fixing fitting, the area along the inner peripheral edge of the through hole can be increased, and thereby, the range where solder easily adheres to both the circuit board and Fix the fitting can be increased. Therefore, it is possible to easily and favorably fix the fixing fitting to the circuit board.

[0014] (2) It is preferable that the surface area region on the side where the retaining portion protrudes in the first surface and the surface area region on the side where the retaining portion protrudes in the second surface are aligned in the width direction. According to this configuration, in the fixing fitting, the region along the inner peripheral edge of the through hole can be increased.

[0015] (3) The fixing fitting has a conduction portion that comes into contact with and conducts electricity to the mating fitting, and it is preferable that the cross-sectional area of the second fitting perpendicular to the insertion direction into the through hole is larger than the cross-sectional area of the first fitting perpendicular to the insertion direction. Compared with the case of only the first fitting, the cross-sectional area of the fixing fitting can be increased, so the electrical resistance can be reduced, and the exchange of current and signals with the mating fitting can be facilitated.

[0016] (4) In the depth direction, it is preferable that the dimension of the second fitting is larger than the dimension of the first fitting. According to this configuration, the region along the inner peripheral edge of the through hole can be increased, so it is easier to better fix the fixing fitting to the circuit board by soldering.

[0017] (5) It is preferable that both end edges of the second fitting in the width direction are along the inner peripheral edge of the through hole. According to this configuration, the region along the inner peripheral edge of the through hole in the second fitting becomes the largest form, so it is easier to better fix the fixing fitting to the circuit board by soldering, and the second fitting can be used to position the fixing fitting in the width direction.

[0018] The connector of the second disclosure is (1) It is provided with a fixing fitting inserted into a through hole formed in a circuit board. The fixing fitting includes a first fitting and a second fitting. The first fitting is elastically deformable in the width direction of the through hole, and has a bent portion inserted into the through hole, and a retaining portion that protrudes from the bent portion to one side in the width direction at the tip of the bent portion and suppresses the bent portion from coming out of the through hole. The second fitting is arranged in the through hole so as to be aligned in the depth direction orthogonal to the width direction with respect to the first fitting. The dimension of the second fitting in the width direction in the through hole is set to be larger than the dimension of the first fitting in the width direction in the through hole. According to this configuration, even if a gap in the width direction is generated between the through hole and the first fitting, the second fitting having a larger width dimension than the first fitting can suppress the displacement of the fixing fitting in the width direction.

[0019] (2) It is preferable that both end faces in the width direction of the second fitting face the inner surface of the through hole in proximity. According to this configuration, the second fitting can position the fixing fitting in the width direction.

[0020] (3) Let the dimension of the first fitting in the width direction be W1, the dimension of the second fitting in the width direction be W2, the dimension of the first fitting in the depth direction be D1, and the dimension of the second fitting in the depth direction be D2. At this time, it is preferable that the second moment of inertia I2 of the second fitting expressed by formula (2) is larger than the second moment of inertia I1 of the first fitting expressed by formula (1). I1=(W1 3 ×D1) / 12…Formula (1) I2=(W2 3 ×D2) / 12…Formula (2)

[0021] According to this configuration, in the width direction, the second fitting can be made more difficult to deform than the first fitting, so the displacement of the fixing fitting in the width direction can be more effectively suppressed or prevented.

[0022] (4) Preferably, the dimension D1 of the first fitting in the depth direction is larger than the dimension D2 of the second fitting in the depth direction. According to this configuration, since the second moment of area is proportional to the cube of the dimension in the width direction, even if the dimension D2 of the second fitting is made smaller than that of the first fitting, the rigidity of the second fitting in the width direction can be kept sufficiently large. By increasing the dimension D1 of the first fitting, the dimension of the retaining portion in the depth direction also increases, and the area where the retaining portion acts on the through hole can be widened. Thereby, the function of the retaining portion to lock to the through hole can be more easily enhanced.

[0023] [Details of Embodiments of the Present Disclosure] [Embodiment 1] Hereinafter, Embodiment 1 embodying the present disclosure will be described with reference to FIGS. 1 to 8. In the following description, regarding the front-rear direction, the back side in FIG. 4 is defined as the front, and the front side is defined as the back. The front side is the side where the connector 10 is fitted to a mating connector (not shown). Regarding the up-down direction, the direction shown in FIG. 4 is directly defined as up and down. Regarding the left-right direction, the direction shown in FIG. 4 is directly defined as left and right.

[0024] As shown in FIG. 1, the connector 10 is placed on the end of the upper surface of the circuit board P and fixed to the circuit board P. A plurality of through holes H are formed through the circuit board P in the thickness direction. The outer shape of these through holes H is square (see FIG. 5). The width direction of these through holes H is the left-right direction, and the depth direction is defined as the front-rear direction. The through holes H are arranged at a position slightly behind the edge F of the circuit board P and are formed in a row in the left-right direction. Specifically, four of these through holes H are grouped together in the left-right direction, and three groups are arranged in the left-right direction with a predetermined distance therebetween.

[0025] The connector 10 includes a housing 15 made of synthetic resin, a plurality of first terminal fittings 25, a plurality of second terminal fittings 26, and a plurality of third terminal fittings 27. The housing 15 is a single component including a terminal holding portion 11 and a hood portion 13 that extends forward in a rectangular tube shape from the outer edge of the terminal holding portion 11. The terminal holding portion 11 forms a wall shape that rises at a right angle to the upper surface of the circuit board P, and the wall thickness direction is oriented in the front-rear direction. A plurality of press-fit holes 12 that penetrate the terminal holding portion 11 in the front-rear direction are formed in the terminal holding portion 11.

[0026] A plurality of first terminal fittings 25, a plurality of second terminal fittings 26, and a plurality of third terminal fittings 27 are attached to the terminal holding portion 11 by being press-fitted into the press-fit holes 12 from the rear.

[0027] As shown in FIG. 2, the first terminal fitting 25 and the second terminal fitting 26 are formed by bending an elongated bar material, and include a conduction portion 28 that extends in the front-rear direction and penetrates the terminal holding portion 11, and a board connection portion 29 that extends downward from the rear end of the conduction portion 28. The front portion of the conduction portion 28 is accommodated in the hood portion 13 and functions as a tab 30 that can come into contact with a mating terminal (not shown) to conduct electricity. The board connection portion 29 is disposed behind the terminal holding portion 11 (see FIG. 1). The lower end portion of the board connection portion 29 projects horizontally rearward and serves as a contact portion 31 that contacts a pattern (not shown) formed on the surface of the circuit board P. The board connection portion 29 of the first terminal fitting 25 is formed longer than the board connection portion 29 of the second terminal fitting 26. For this reason, the conduction portion 28 of the first terminal fitting 25 is press-fitted into the upper press-fit hole 12, and the conduction portion 28 of the second terminal fitting 26 is press-fitted into the lower press-fit hole 12 (see FIG. 1).

[0028] As shown in FIG. 3, the third terminal fitting 27 is formed by pressing a flat sheet metal. Each third terminal fitting 27 includes a conduction portion 27A that extends in the front-rear direction and penetrates the terminal holding portion 11 in the front-rear direction, and a hanging portion 27B that extends downward from the rear end of the conduction portion 27A.

[0029] The conduction part 27A is oriented such that the double-folded sheet metal is stacked with the thickness direction being the vertical direction. Specifically, the conduction part 27A has a form in which two sheets of sheet metal stacked in the vertical direction are connected at the right edge among the left and right edges in the horizontal direction. The front part of the conduction part 27A is housed in the hood part 13 with the thickness direction being the vertical direction and has a function of coming into contact with a mating fitting (not shown) for conduction. Surface pressing processing is performed on the front edge and both left and right edges in the horizontal direction of the conduction part 27A.

[0030] The hanging part 27B has a pair of fixing parts 27E which are fixing fittings extending downward from each of the left and right ends of the rear edge of the conduction part 27A. These fixing parts 27E are arranged in forms reversed in the front-rear direction and the left-right direction, and since their configurations are the same, the following description will be about the left fixing part 27E, and the description about the right fixing part 27E will be omitted.

[0031] The fixing part 27E has a first insertion part 27G which is a first fitting and a second insertion part 27H which is a second fitting. The first insertion part 27G has a bending part 27J which extends downward in a columnar shape in the hanging part 27B continuous with the rear end of the lower sheet metal of the conduction part 27A with the thickness direction being the front-rear direction, and a retaining part 27K which protrudes leftward from the bending part 27J at the lower end part (tip part) of the bending part 27J. The bending part 27J is inserted into the through hole H from above and is elastically deformable in the left-right direction (see Fig. 7). The retaining part 27K is formed such that the dimension protruding leftward gradually increases as it goes upward from the lower end of the bending part 27J. A locking surface 27L orthogonal to the direction in which the bending part 27J extends (vertical direction) is formed at the upper end of the retaining part 27K. The left edge of the front surface of the bending part 27J is surface pressed. Note that the right edge of the rear surface of the right bending part 27J is surface pressed.

[0032] The second insertion part 27H extends downward in a columnar shape at the hanging part 27B that continues to the rear end of the sheet metal above the conduction part 27A with the plate thickness direction facing the front-rear direction. The left edge of the rear surface of the second insertion part 27H is surface pressed. Note that for the second insertion part 27H on the right side, the right edge of the front surface is surface pressed. Inside the through hole H, the second insertion parts 27H are arranged adjacent to each other so as to be aligned in the front-rear direction (the depth direction in the through hole H) that is orthogonal to the left-right direction (the width direction in the through hole H) with respect to the first insertion part 27G (see Fig. 5). The dimension of the second insertion part 27H in the left-right direction is larger than the dimension of the bent part 27J of the first insertion part 27G in the left-right direction (see Fig. 5). The dimension L1 from the left end of the retaining part 27K of the first insertion part 27G to the right end of the bent part 27J is the same as the dimension L2 of the second insertion part 27H in the left-right direction (see Fig. 5). In the left-right direction, the left end surfaces of the first insertion part 27G and the second insertion part 27H are aligned (see Fig. 5). The vertical positions of the lower ends of the first insertion part 27G and the second insertion part 27H are aligned (see Fig. 4).

[0033] An example of the process of attaching the connector 10 formed in this way to the circuit board P will be described. First, the connector 10 is arranged above the circuit board P so that the fixing part 27E of each third terminal fitting 27 corresponds above each through hole H. In the circuit board P, solder in a paste state is previously applied to the patterns where the first terminal fitting 25, the second terminal fitting 26, and the third terminal fitting 27 come into contact. Then, the connector 10 is brought closer to the circuit board P, and the fixing part 27E is inserted into each through hole H.

[0034] Specifically, as shown in Fig. 6, the lower end part of each retaining part 27K contacts either one of the both end edges in the width direction of the through hole H (in Fig. 6, the lower end part of the retaining part 27K contacts the left edge of the through hole H). Then, when the insertion of the fixing part 27E into each through hole H is further advanced, each retaining part 27K is pressed by the edge of the through hole H that it contacts. As a result, the bent part 27J is elastically deformed in the width direction of the through hole H (see Fig. 7).

[0035] Then, when each retaining portion 27K passes downward through the through-hole H, the flexure portion 27J elastically returns, and the locking surface 27L of each retaining portion 27K is disposed at a position facing the lower surface of the circuit board P (see FIG. 8). Thus, each retaining portion 27K is disposed at a position where it can be locked to the lower end edge of the through-hole H, suppressing the flexure portion 27J from coming out of the through-hole H. Thereby, even when the coplanarity (flatness) of the contact portions 31 of each of the plurality of first terminal fittings 25 and the plurality of second terminal fittings 26 is not good, the contact portions 31 can surely contact the pattern formed on the surface of the circuit board P. Then, when the circuit board P to which the connector 10 is attached is inserted into a reflow furnace, the paste-like solder melts, and the fixing portion 27E and each contact portion 31 are fixed to the pattern formed on the surface of the circuit board P.

[0036] As shown in FIG. 5, in the through-hole H, the first insertion portion 27G has a first along-surface A1 (a portion indicated by a thick line in FIG. 5) along the inner peripheral edge of the through-hole H. And the second insertion portion 27H has a second along-surface A2 (a portion indicated by a dotted line in FIG. 5) along the inner peripheral edge of the through-hole H. Here, along the inner peripheral edge of the through-hole H means, when viewed from the insertion direction with respect to the through-hole H, a position closer to the inner peripheral edge of the through-hole H than the center of the through-hole H and parallel to the inner peripheral edge of the through-hole H. The second along-surface A2 is larger than the first along-surface A1.

[0037] The edge surface region A11 of the first edge surface A1 on the side where the retaining portion 27K protrudes and the edge surface region A22 of the second edge surface A2 on the side where the retaining portion 27K protrudes are aligned in the width direction of the through hole H. The cross-sectional area S2 of the second insertion portion 27H orthogonal to the insertion direction with respect to the through hole H is larger than the cross-sectional area S1 of the bent portion 27J of the first insertion portion 27G orthogonal to the insertion direction. Both end edges of the second insertion portion 27H in the width direction of the through hole H are along the inner peripheral edge of the through hole H. Further, each of both end surfaces (the second edge surfaces A2 located at both ends in the width direction) of the second insertion portion 27H in the width direction faces the inner surfaces H1 located at both ends in the width direction of the through hole H in a state of being close to each other. Here, being close to each other and facing means that, when viewed from the insertion direction with respect to the through hole H, it is in a state of facing the inner peripheral edge of the through hole H at a position closer to the inner peripheral edge of the through hole H than the center of the through hole H.

[0038] Let the dimension of the bent portion 27J of the first insertion portion 27G in the width direction of the through hole H be W1, and the dimension of the second insertion portion 27H in the width direction of the through hole H be W2. Then, let the dimension of the bent portion 27J of the first insertion portion 27G in the depth direction of the through hole H be D1, and the dimension of the second insertion portion 27H in the depth direction of the through hole H be D2. In this case, the second moment of inertia I2 of the second insertion portion 27H represented by the formula (2) shown in Equation 1 is larger than the second moment of inertia I1 of the first insertion portion 27G represented by the formula (1) shown in Equation 1.

[0039]

Equation

[0040] Next, the operation of Embodiment 1 will be described.

[0041] The connector 10 is inserted into a rectangular through hole H formed in the circuit board P and includes a fixing portion 27E fixed to the circuit board P using solder. The fixing portion 27E includes a first insertion portion 27G and a second insertion portion 27H. The first insertion portion 27G has a bending portion 27J and a retaining portion 27K. The bending portion 27J is elastically deformable in the width direction of the through hole H and is inserted into the through hole H. The retaining portion 27K protrudes in the width direction from the bending portion 27J at the tip of the bending portion 27J and suppresses the bending portion 27J from coming out of the through hole H. The second insertion portion 27H is arranged in the depth direction orthogonal to the width direction with respect to the first insertion portion 27G within the through hole H. The second surface A2 along the inner peripheral edge of the through hole H of the second insertion portion 27H is larger than the first surface A1 along the inner peripheral edge of the through hole H of the first insertion portion 27G. According to this configuration, in the fixing portion 27E, the region along the inner peripheral edge of the through hole H can be increased, and thereby, the range where solder easily adheres to both the circuit board P and the third terminal fitting 27 can be increased. Therefore, it is possible to easily and favorably fix the fixing portion 27E to the circuit board P.

[0042] The surface area region A11 of the first surface A1 on the side where the retaining portion 27K protrudes and the surface area region A22 of the second surface A2 on the side where the retaining portion 27K protrudes are aligned in the width direction. According to this configuration, in the fixing portion 27E, the region along the inner peripheral edge of the through hole H can be further increased.

[0043] The fixing portion 27E has a conduction portion 27A that comes into contact with and conducts to the mating fitting. The cross-sectional area S2 of the second insertion portion 27H orthogonal to the insertion direction with respect to the through hole H is larger than the cross-sectional area S1 of the first insertion portion 27G orthogonal to the insertion direction. Compared with the case where the front and rear dimensions of the first insertion portion 27G are doubled instead of the second insertion portion 27H, the total cross-sectional area of the fixing portion 27E can be increased, so the electrical resistance can be reduced, and it is possible to easily and favorably perform the exchange of current and signals with the mating fitting.

[0044] Both end edges of the second insertion portion 27H in the width direction are along the inner peripheral edge of the through hole H. According to this configuration, since the region along the inner peripheral edge of the through hole H in the second insertion portion 27H becomes the largest form, it becomes easier to better fix the fixing portion 27E to the circuit board P by soldering. At the same time, the positioning of the fixing portion 27E in the width direction can be performed by the second insertion portion 27H.

[0045] The connector 10 includes a fixing portion 27E that is inserted into a through hole H formed in the circuit board P. The fixing portion 27E includes a first insertion portion 27G and a second insertion portion 27H. The first insertion portion 27G is elastically deformable in the width direction of the through hole H. The first insertion portion 27G has a bending portion 27J inserted into the through hole H and a retaining portion 27K that protrudes from the bending portion 27J to one side in the width direction at the tip of the bending portion 27J and suppresses the bending portion 27J from coming out of the through hole H. The second insertion portion 27H is arranged in the through hole H so as to be arranged in the depth direction orthogonal to the width direction with respect to the first insertion portion 27G. The dimension in the width direction of the second insertion portion 27H in the through hole H is set to be larger than the dimension in the width direction of the first insertion portion 27G in the through hole H. According to this configuration, even if a gap in the width direction is generated between the through hole H and the first insertion portion 27G, the displacement of the fixing portion 27E in the width direction can be suppressed by the second insertion portion 27H having a larger width dimension than the first insertion portion 27G.

[0046] Both end faces of the second insertion portion 27H in the width direction are opposed to and close to the inner surface H1 of the through hole H. According to this configuration, the positioning of the fixing portion 27E in the width direction can be performed by the second insertion portion 27H.

[0047] Let the dimension of the first insertion portion 27G in the width direction be W1, the dimension of the second insertion portion 27H in the width direction be W2, the dimension of the first insertion portion 27G in the depth direction be D1, and the dimension of the second insertion portion 27H in the depth direction be D2. At this time, the second moment of inertia I2 of the cross-section of the second insertion portion 27H expressed by formula (2) is larger than the second moment of inertia I1 of the cross-section of the first insertion portion 27G expressed by formula (1). I1=(W1 3 ×D1) / 12…Formula (1) I2=(W2 3 ×D2) / 12…Formula (2)

[0048] According to this configuration, in the width direction, the second insertion portion 27H can be made more difficult to deform than the first insertion portion 27G, so that the displacement of the fixing portion 27E in the width direction can be more effectively suppressed or prevented.

[0049] [Embodiment 2] Embodiment 2 embodying the present disclosure will be described with reference to FIGS. 9 and 10. The connector 110 of Embodiment 2 differs from that of Embodiment 1 in the configuration of the third terminal fitting 127. Since the other configurations are the same as those of Embodiment 1, the same configurations are denoted by the same reference numerals, and the description of the structure, operation, and effects is omitted. In Embodiment 2, regarding the front-rear direction, the upper side in FIG. 10 is defined as the front, and the lower side is defined as the rear. Regarding the up-down direction, the front side in FIG. 10 is defined as the upper side, and the rear side is defined as the lower side. Regarding the left-right direction, the directions shown in FIG. 10 are directly defined as the left side and the right side.

[0050] As shown in FIG. 9, the third terminal fitting 127 has a conduction portion 127A that extends in the front-rear direction and penetrates the terminal holding portion 11, and a hanging portion 127B that extends downward substantially at a right angle from the rear end of the conduction portion 127A.

[0051] The conduction part 127A is oriented such that the three-folded sheet metal is stacked in the vertical direction. For example, in the conduction part 127A, the left end edge of the topmost sheet metal and the left end edge of the bottommost sheet metal are connected. And the right end edge of the sheet metal located at the center in the vertical direction and the right end edge of the bottommost sheet metal are connected. The front part of the conduction part 127A is accommodated in the hood part 13 with the plate thickness direction facing the vertical direction.

[0052] The hanging part 127B has a pair of fixing parts 127E which are fixing metal fittings extending downward from each of the left and right end parts of the rear end edge of the conduction part 127A. These fixing parts 127E are arranged in forms reversed in the front-rear direction and the left-right direction, and since their configurations are the same, the following will explain the left fixing part 127E, and the explanation of the right fixing part 127E will be omitted.

[0053] The fixing part 127E has a first insertion part 27G which is a first metal fitting and two second insertion parts 127H which are second metal fittings. The first insertion part 27G has a bending part 27J and a retaining part 27K. The bending part 27J extends downward in a columnar shape in the hanging part 127B which is continuous with the rear end of the bottommost sheet metal of the conduction part 127A with the plate thickness direction facing the front-rear direction. The retaining part 27K protrudes leftward from the bending part 27J at the lower end part (tip part) of the bending part 27J.

[0054] The two second insertion parts 127H extend downward in a columnar shape in each of the hanging part 127B which is continuous with the rear end of the topmost sheet metal of the conduction part 127A and the hanging part 127B which is continuous with the rear end of the sheet metal located at the center in the vertical direction with the plate thickness direction facing the front-rear direction. That is, in the front-rear direction, the combined dimension of the two second insertion parts 127H is twice as large as the dimension of the first insertion part 27G. That is, the dimension of one second metal fitting is larger than the dimension of the first insertion part 27G (the first metal fitting) (see FIG. 10).

[0055] As shown in FIG. 10, the two second insertion portions 127H are adjacently arranged so as to be aligned in the front-rear direction (the depth direction in the through hole H) orthogonal to the left-right direction (the width direction in the through hole H) with respect to the first insertion portion 27G. The dimension of the second insertion portion 127H in the left-right direction is larger than the dimension of the bent portion 27J of the first insertion portion 27G in the left-right direction. The dimension L1 from the left end of the retaining portion 27K of the first insertion portion 27G to the right end of the bent portion 27J is the same as the dimension L2 of the second insertion portion 127H in the left-right direction. In the left-right direction, the left end surfaces of the first insertion portion 27G and the second insertion portion 127H are aligned.

[0056] In the depth direction of the through hole H, the dimension of the second insertion portion 127H is larger than the dimension of the bent portion 27J of the first insertion portion 27G. According to this configuration, since the area along the inner peripheral edge of the through hole H can be increased, it is possible to more easily and favorably fix the fixing portion 127E to the circuit board P by soldering.

[0057] [Embodiment 3] Embodiment 3 embodying the present disclosure will be described with reference to FIGS. 11 and 12. The connector 210 of Embodiment 3 is different from those of Embodiments 1 and 2 in the configuration of the third terminal fitting 227. Since the other configurations are the same as those of Embodiments 1 and 2, the same configurations are denoted by the same reference numerals, and the description of the structure, operation, and effects is omitted. In Embodiment 3, for the front-rear direction, the upper side in FIG. 12 is defined as the front, and the lower side is defined as the rear. For the up-down direction, the front side in FIG. 12 is defined as the upper side, and the back side is defined as the lower side. For the left-right direction, the directions shown in FIG. 12 are directly defined as the left side and the right side.

[0058] As shown in FIG. 11, the third terminal fitting 227 has a conduction portion 227A that extends in the front-rear direction and penetrates the terminal holding portion 11, and a hanging portion 227B that extends downward substantially at a right angle from the rear end of the conduction portion 227A. The conduction portion 227A is in a direction in which three-folded sheet metal is stacked in the up-down direction.

[0059] The hanging part 227B has a pair of fixing parts 227E which are fixing brackets extending downward from each of the left and right end parts of the rear edge of the conducting part 227A. These fixing parts 227E are arranged in forms reversed in the front-back direction and the left-right direction, and since their configurations are the same, the following will describe the left fixing part 227E, and the description of the right fixing part 227E will be omitted.

[0060] The fixing part 227E has a first insertion part 227G which is a first metal fitting and a second insertion part 27H which is a second metal fitting. One first insertion part 227G has two bending parts 227J arranged in the front-back direction and a retaining part 227K arranged in the front-back direction. The two bending parts 227J extend downward in a columnar shape at each of the hanging part 227B connected to the rear end of the sheet metal located at the bottom of the conducting part 227A with the plate thickness direction facing the front-back direction and the hanging part 227B connected to the rear end of the sheet metal located at the center in the up-down direction. The two retaining parts 227K project leftward from the bending parts 227J at the lower ends (tip parts) of the two bending parts 227J.

[0061] [Details of Embodiments of the Present Disclosure] [Embodiment 1] The second insertion part 27H extends downward in a columnar shape at the hanging part 227B connected to the rear end of the sheet metal located at the top of the conducting part with the plate thickness direction facing the front-back direction. As shown in FIG. 12, in the front-back direction, the dimension D3 of the first insertion part 227G is twice as large as the dimension D4 of the second insertion part 27H, that is, the dimension D3 of the first insertion part 227G is larger than the dimension of the second insertion part 27H. 227A

[0062] ​The dimension D3 of the first insertion portion 227G in the depth direction of the through hole H is larger than the dimension D4 of the second insertion portion 27H in the depth direction of the through hole H. According to this configuration, since the second moment of area is proportional to the cube of the dimension in the width direction of the through hole H, even if the dimension D4 of the second insertion portion 27H is made smaller than that of the first insertion portion 227G, the rigidity in the width direction of the second insertion portion 27H can be kept sufficiently large. By increasing the dimension D3 of the first insertion portion 227G, the dimension of the retaining portion 227K in the depth direction also increases, and the area on which the retaining portion 227K acts on the through hole H can be widened. Thereby, the function of the retaining portion 227K to lock to the through hole H can be more easily enhanced.

[0063] [Other Embodiments] It should be considered that all aspects of the embodiments disclosed this time are illustrative and not restrictive. The scope of the present invention is not limited to the embodiments disclosed this time, but is indicated by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

[0064] Different from Embodiments 1 to 3, as shown in FIG. 13, the bending portion 327J of the first insertion portion 327G may be brought closer to the left side of the through hole H, and the second insertion portion 327H may be brought closer to the right side of the through hole H.

[0065] Different from Embodiments 1 to 3, as shown in FIG. 14, the left-right dimensions of the bending portion 427J of the first insertion portion 427G and the second insertion portion 427H may be the same. In this case, a relief region N into which the bending portion 427J of the first insertion portion 427G enters when elastically deformed is formed in the through hole H.

[0066] The outer shape of the through hole is not limited to a square, and may be circular or polygonal.

[0067] Different from Embodiments 1 to 3, the pair of fixing portions may be arranged in a form reversed in the left-right direction with respect to each other.

[0068] The number and arrangement positions of the first terminal fitting, the second terminal fitting, and the third terminal fitting in the connector are not limited to the disclosure of Embodiment 1.

Explanation of Signs

[0069] 10, 110, 210... Connectors 11... Terminal holding part 12... Press-fitting hole 13... Hood part 15... Housing 25... First terminal fitting 26... Second terminal fitting 27, 127, 227... Third terminal fitting 27A, 127A, 227A... Conductive part 27B, 127B, 227B... Hanging part 27E, 127E, 227E... Fixing part (fixing fitting) 27G, 227G, 327G, 427G... First insertion part (first fitting) 27H, 127H, 327H, 427H... Second insertion part (second fitting) 27J, 227J, 327J, 427J... Bending part 27K, 227K... Retaining part 27L... Locking surface 28... Conductive part 29... Board connection part 30... Tab 31... Contact part A1... First creepage surface A11, A22... Creepage surface area A2... Second creepage surface D1, D3... Dimensions (dimensions of the first insertion part in the depth direction) D2, D4... Dimensions (dimensions of the second insertion part in the depth direction) F... Edge H... Through hole H1... Inner surface I1... Second moment of area I2... Second moment of area L1... Dimension L2... Dimension N... Relief area P... Circuit board S1... Cross-sectional area S2... Cross-sectional area W1... Dimension of the first insertion part in the width direction W2... Dimension of the second insertion part in the width direction

Claims

1. A fixing fitting that is inserted into a through hole formed in a circuit board and fixed to the circuit board using solder, The fixing fitting includes: a bending portion that is elastically deformable in the width direction of the through hole and is inserted into the through hole; and a retaining portion that protrudes from the bending portion in the width direction at the tip of the bending portion and suppresses the bending portion from coming out of the through hole, and a first fitting having the retaining portion; a second fitting disposed in the through hole so as to be arranged in the depth direction orthogonal to the width direction with respect to the first fitting; The first fitting and the second fitting are in a flat plate shape, Of the plate surface of the first fitting and the plate surface of the second fitting, portions located within the square through hole are parallel and opposed to each other, The second surface along the inner peripheral edge of the through hole of the second fitting is larger than the first surface along the inner peripheral edge of the through hole of the first fitting, In the depth direction, the dimension of the second fitting is larger than the dimension of the first fitting, a connector.

2. The connector according to claim 1, wherein a surface area region of the first surface on the side where the retaining portion protrudes and a surface area region of the second surface on the side where the retaining portion protrudes are aligned in the width direction.

3. The fixing fitting has a conducting portion that comes into contact with and conducts with a mating fitting, The connector according to claim 1 or claim 2, wherein a cross-sectional area of the second fitting orthogonal to the insertion direction with respect to the through hole is larger than a cross-sectional area of the first fitting orthogonal to the insertion direction.

4. The connector according to any one of claims 1 to 3, wherein both end edges of the second fitting in the width direction are along the inner peripheral edge of the through hole.

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