JP5511301B2 - Press-fit terminal and power semiconductor device provided with the press-fit terminal - Google Patents

Description

  The present invention relates to a press-fit terminal, in particular, a press-fit terminal for high-current applications, and a power semiconductor device including the press-fit terminal.

  Conventionally, as a method of connecting a terminal and a circuit board without soldering, press-fit connection is known in which a terminal is inserted into a through hole of a printed board to make a connection. For example, the press-fit terminal described in Patent Document 1 has a press contact portion 1 that is inserted into a through hole, as shown in FIG. A longitudinally long opening 2 extending in the axial direction of the press-fit terminal is formed at the center of the press-contact portion 1, and an elastic contact portion 3a that can be elastically deformed with the opening 2 as a bending space, 3b is formed. The elastic contact portions 3a and 3b are formed with auxiliary fulcrum portions 4 that contact each other when the press-fit terminals are inserted into the through holes and the elastic contact portions 3a and 3b are deformed.

  By adopting such a configuration, in the initial stage of insertion of the press-fit terminal into the through hole, the fulcrums A and B in the elastic contact portions 3a and 3b are fulcrums of the double-supported beam structure. Then, the elastic contact portions 3a and 3b contact at the auxiliary fulcrum portion 4, the fulcrum B moves to the fulcrum C, and the distance between the fulcrums becomes smaller than the initial distance. As a result, the reaction force of the elastic contact portions 3a and 3b can be increased and the pressure contact force can be increased.

  Also, in Patent Document 2, as shown in FIG. 15, similarly to Patent Document 1, the first and second elastically deforming portions 6 a and 6 b are provided, and the elastic deforming portions 6 a and 6 b protrude. A press-fit terminal provided with portions 7a and 7b is disclosed. In a state where the press-fit terminal is inserted into the through hole, the protrusions 7a and 7b are in contact with each other to increase the contact force. In the state where the projecting portions 7a and 7b are in contact with each other, openings are formed at two locations corresponding to the base portion and the distal end portion of the elastically deforming portions 6a and 6b in the axial direction of the press-fit terminal. The protrusions 7a and 7b have a substantially L-shaped cross section in a direction orthogonal to the axial direction. As a result, the pressure contact force is reduced at the initial stage of insertion into the through hole, and the pressure contact force can be increased at the insertion completion stage. Moreover, compared with patent document 1, the length in the said axial direction of the said protrusion parts 7a and 7b to contact | abut is large, and a bigger press-contact force can be generated.

JP-A-2005-259502 JP 2007-265641 A

  In the press-fit terminal described in Patent Document 1, as described above, the elastic contact portions 3a and 3b are brought into contact with each other at the auxiliary fulcrum portion 4 in the inserted state into the through hole, whereby the distance between the fulcrums is shortened. Pressure contact force increases. As described above, this terminal has a structure that generates a pressure contact force against the inner wall of the through hole by a repulsive force caused by bending of the elastic contact portions 3a and 3b. However, a material having high conductivity such as copper is generally used. The spring property is low, and a repulsive force caused by bending cannot generate a sufficient pressure contact force against the inner wall of the through hole, and it is difficult to maintain the parallelism between the terminal and the inner wall of the through hole. In order to flow a large current, it is desirable to make the contact area between the outer peripheral surface of the terminal and the inner wall of the through hole as large as possible. However, the press-fit terminal described in Patent Document 1 allows a large current to flow due to the above problem. There was a problem that could not. Note that materials such as phosphor bronze and brass having high spring properties have high electrical resistivity and are not suitable for press-fit terminals for large currents.

  As described above, in order to reduce the contact resistance when a large current flows, it is generally preferable to bring the outer periphery of the press-fit terminal into contact with the inner wall of the through hole. In particular, the inner wall portion of the through hole in the vicinity of the pattern of the printed circuit board where current density is concentrated, that is, one end and the other end in the terminal press-fitting direction in the through hole need to be in contact with the press-fit terminal.

  The repulsive force of the press-fit terminal described in Patent Document 2 on the inner wall of the through hole is caused by the contact between the pair of protruding portions 7a and 7b that are elastically deformed. However, as described above, a material having a narrow elastic range and a low spring property is plastically deformed. As a result, a repulsive force to the inner wall of the through hole cannot be obtained, and it is difficult to keep parallel. Therefore, there is a problem that the contact area is reduced and the contact resistance is increased. Moreover, this terminal shape has the problem that press work is complicated and the manufacturing cost of a terminal becomes high.

  Further, in the press-fit terminal described in Patent Document 2, as described above, contact is made at one location of the protruding portions 7a and 7b, and a repulsive force is generated by this contact. When the pressing force is generated by the protruding portions 7a and 7b at one place, the contact area of the protruding portions 7a and 7b increases, and the pressing force against the through hole may become too large at the initial insertion. As a result, plating shaving, plating peeling, and whitening of the substrate during insertion become problems. Further, if the pressure contact force during insertion is too large, the spring property is low, and a soft material may cause the terminal shaft to buckle and cannot be inserted.

  The present invention has been made to solve the above-described problems, a press-fit terminal that can cope with a large current and can improve long-term reliability as compared with the conventional one, and the press-fit terminal. It aims at providing the semiconductor device for electric power provided with.

In order to achieve the above object, the present invention is configured as follows.
That is, the press-fit terminal according to one aspect of the present invention has a base portion and a tip portion, and is press-fitted into the cylindrical conductor portion from the tip portion toward the base portion and is electrically connected to the cylindrical conductor portion. A press-fit terminal, a pair of press contact portions provided between the base portion and the distal end portion and arranged to face each other, inserted into the cylindrical conductor portion and formed on the inner surface of the cylindrical conductor portion A pressure contact portion that is in contact with each other, and a first connection portion that is provided between the pressure contact portions, connects the pressure contact portions, presses the pressure contact portion against the inner surface, and forms a first opening with the base portion. Provided between the press contact portions and positioned closer to the tip than the first connection portion, connecting the press contact portions to press the press contact portion against the inner surface and at least one between the first connection portions. And forming a second opening between the tip and the tip 3 comprises at least one second coupling portion to form an opening, and the first coupling portion than the intermediate position between the tip and the base portion is formed between the pressure contact portion of the base side, said second connection The portion is formed between the press contact portions on the tip end side with respect to the intermediate position between the tip portion and the base portion, and each of the first connecting portion and the second connecting portion has the press-fit terminal as the cylindrical conductor. In a state before being inserted into the part, they are separated through a slit, and the pair of separated first connecting parts and the pair of separated second connecting parts have opposing contact surfaces, respectively. In the state of being inserted into the cylindrical conductor portion, the contact surfaces of the first connecting portion are in contact with each other, and the contact surfaces of the second connecting portion are in contact with each other , In the axial direction, between the first connecting portion and the second connecting portion And the inner surface of the contact portion and the tubular conductor portion, characterized in that the contact.

  According to the press-fit terminal in one aspect of the present invention, the first connection portion and the second connection portion are provided between the opposing pressure contact portions, and the base portion and the tip portion become a deformation portion at the time of insertion, and the first connection portion and The second connecting portion is a portion that generates a contact force after insertion. By comprising in this way, the location which deform | transforms during the insertion of the said press fit terminal to a cylindrical conductor part, and the location which produces a press-contact force after insertion can be divided. Therefore, the press-contact portion of the press-fit terminal can generate a repulsive force due to compression on the inner wall of the cylindrical conductor portion, and the outer surface of the press-contact portion reliably presses against the inner wall of the cylindrical conductor portion after insertion. Can be generated. Furthermore, it becomes easy to keep the outer surface of the press contact portion parallel to the inner wall of the cylindrical conductor portion. As a result, the press contact portion is pressed against the inner surface of the cylindrical conductor portion, so that the contact force, that is, the press contact force can be improved and the contact area can be increased. Therefore, the contact resistance is reduced, the temperature rise due to the heat generation of the contact resistance during energization is suppressed, and a large current can flow. In addition, since the contact force, that is, the pressure contact force can be improved, a press-fit terminal can be manufactured using a material having low spring properties, that is, a material having low electrical resistivity, and from this point, it is possible to cope with a large current. Become. Further, since the contact force, that is, the pressure contact force is improved and the temperature rise is suppressed, the reliability to the temperature cycle is increased, and the long-term reliability can be improved as compared with the conventional case.

  Moreover, the cross-sectional area of each connection part can be made small by providing the 1st connection part and the 2nd connection part as mentioned above. Therefore, it is possible to prevent the press contact force from being generated locally, and to reduce the insertion force in the initial stage of inserting the press fit terminal into the cylindrical conductor portion. As a result, damage to the press-fit terminal and the cylindrical conductor can be prevented, and problems such as plating scraping, plating peeling, and whitening of the substrate can be prevented. Further, it is possible to prevent the terminal shaft from being buckled during insertion.

It is a figure which shows the structure of the press fit part of the press fit terminal in Embodiment 1 of this invention. It is sectional drawing of the press-contact part in the center part of the press fit part shown to FIG. 1A. It is sectional drawing of the printed circuit board in which the press fit terminal shown in FIG. 1A is inserted. It is a top view of the printed circuit board shown in FIG. 2A. It is a figure which shows the state by which the press fit terminal shown to FIG. 1A was inserted in the through hole. It is a figure which shows the structure of the press fit part of the press fit terminal in Embodiment 2 of this invention. It is a figure which shows the state by which the press fit terminal shown in FIG. 4 was inserted in the through hole. It is a figure which shows the structure of the press fit part of the press fit terminal in Embodiment 3 of this invention. It is a figure which shows the modification of the press fit terminal shown to FIG. 6A. It is a figure which shows the structure of the press fit part of the press fit terminal in Embodiment 4 of this invention. It is a figure which shows the state by which the press fit terminal shown in FIG. 7 was inserted in the through hole. It is a figure which shows the structure of the press fit part of the press fit terminal in Embodiment 5 of this invention. It is a figure which shows the structure of the press fit part in the other press fit terminal in Embodiment 5 of this invention. It is a figure for demonstrating the preparation methods of the press fit terminal shown to FIG. 10A. It is a figure which shows the structure of the press fit part of the press fit terminal in Embodiment 6 of this invention. It is a front view of the power semiconductor device in Embodiment 7 of this invention which is a transfer type power semiconductor device provided with the press-fit terminal. FIG. 12B is a side view of the power semiconductor device shown in FIG. 12A. It is a front view of the power semiconductor device in Embodiment 7 of this invention, and the case type power semiconductor device provided with the press-fit terminal. FIG. 13B is a side view of the power semiconductor device shown in FIG. 13A. It is a figure which shows an example of the conventional press fit terminal. It is a figure which shows the other example of the conventional press fit terminal.

A press-fit terminal according to an embodiment of the present invention and a power semiconductor device including the press-fit terminal will be described below with reference to the drawings. In each figure, the same or similar components are denoted by the same reference numerals.
Further, as already described, the press-fit terminal is a terminal that is inserted into the cylindrical conductor portion and electrically connected to the cylindrical conductor portion without performing soldering. In each of the embodiments described below, a through hole in a circuit board is taken as an example as the cylindrical conductor portion. However, the cylindrical conductor portion is not limited to a through hole, and a conductor is provided on the inner surface of a cylindrical body such as a circle or a rectangle. Any conductor portion that is provided and can be electrically connected to the inserted press-fit terminal may be used.

Embodiment 1 FIG.
1 to 3 are views showing a press-fit terminal 11 according to Embodiment 1 of the present invention. Such a press-fit terminal 11 is used as a terminal provided in a semiconductor device 40 as shown in FIG. 12A, for example.

FIG. 1A shows the outer shape of a press-fit portion 12 that is a portion that can be inserted into a through-hole 31 (FIGS. 2A and 2B) that is a hollow cylindrical hole in a printed circuit board in the press-fit terminal 11. The press fit portion 12 is roughly divided into a base portion 18a, a tip end portion 18b, and pressure contact portions 16a and 16b. The base portion 18 a is a portion located on the semiconductor device side in the press fit portion 12, and the tip portion 18 b is located at the tip portion of the press fit terminal 11. The pressure contact portions 16a and 16b are a pair of members that are formed integrally with the base portion 18a and the front end portion 18b between the base portion 18a and the front end portion 18b, and are disposed to face each other as shown in FIG. The conductors inserted in the through holes 31 and in contact with the conductors provided on the inner surface of the through holes 31 are respectively contacted. Further, as shown in FIG. 1A, the press contact portions 16a and 16b have a bulging portion that swells in an orthogonal direction 29b orthogonal to the axial direction 29a at a central portion in the axial direction 29a of the press-fit terminal 11.
The press fit portion 12 will be described in more detail below.

  Each of the press contact portions 16a and 16b constituting the press fit portion 12 is formed of copper having a plate thickness of 1.0 mm and a width of 3.0 mm as an example. Of course, the press-fit terminal 11 including the press-fit portion 12 can be made of a metal material other than copper. The above dimensions are reference values, and other values may be used.

  Each of the pressure contact portions 16a and 16b has a tapered portion 28 on the distal end portion 18b side, a tapered portion 26 on the base portion 18a side, and a parallel portion 27 positioned between both tapered portions 26 and 28. The tapered portion 28 on the distal end side is preferably a gentle angle with respect to the axial direction 29a, that is, the distal end portion 18b is sharpened to facilitate insertion into the through hole 31. Further, in the parallel portion 27, each of the pressure contact portions 16a and 16b is arranged in parallel to the axial direction 29a, and the length (vertical length) of the parallel portion 27 in the axial direction 29a is particularly large when a large current flows. Since it is necessary to increase the contact area, the thickness is preferably larger than the thickness of the printed circuit board. As shown in FIG. 1B, each of the pressure contact portions 16 a and 16 b in the parallel portion 27 desirably has a chamfer 16 c in order to increase the contact area when inserted into the through hole 31.

  In the present embodiment, as shown in the figure, the first connection for connecting the press contact portion 16a and the press contact portion 16b between the opposing press contact portion 16a and the press contact portion 16b at both ends of the parallel portion 27 in the axial direction 29a. The part 14 and the 2nd connection part 15 are provided. The first connecting portion 14 and the second connecting portion 15 are members that can press the pressure contact portions 16 a and 16 b against the inner surface of the through hole 31. That is, when the press-fit terminal 11 is inserted into the through hole 31, it corresponds to a portion that generates a pressure contact force. The first connecting portion 14 forms a first opening 13a with the base portion 18a, and the second connecting portion 15 forms a third opening 13c with the tip portion 18b. A second opening 13 b is formed between the portion 14 and the second connecting portion 15.

  In the present embodiment, as shown in the drawing, the first connecting portion 14 and the second connecting portion 15 both extend linearly along the orthogonal direction 29b, and are further integrated with the press contact portion 16a and the press contact portion 16b. It is formed by. Moreover, in this embodiment, the arrangement | positioning space | interval in the axial direction 29a of the 1st connection part 14 and the 2nd connection part 15 respond | corresponds to the upper surface part and lower surface part in the thickness direction 30a of the printed circuit board 30, as shown in FIG. It is an interval. Further, the length of the first connecting portion 14 and the second connecting portion 15 in the orthogonal direction 29b is determined by pressing in the state where the press fit portion 12 of the press fit terminal 11 is inserted into the through hole 31 as shown in FIG. The parallel portions 27 in the portions 16a and 16b are set to such a length that the inner surface of the through hole 31 can be pressed.

  Further, in the present embodiment, the receiving portion 21 for pressing with a jig when the press fit portion 12 is inserted into the through hole 31 is formed adjacent to the base portion 18a and extending in the orthogonal direction 29b. Has been. Note that the receiving portion 21 is necessary when a single press-fit terminal is inserted into the through-hole 31. For example, when a press-fit terminal is used as an electrode terminal of a power semiconductor device, the press-fit terminal is used. Is not required because it is fixed to the lead.

2A and 2B show a through hole 31 of the printed circuit board 30 into which the above-described press-fit terminal 11 is inserted. As an example, a pattern of 35 μm is formed on both front and back surfaces of a printed board 30 having a thickness of 1.6 mm, and as shown in FIG. 2A, a through hole 31 having a diameter of 2.7 mm is formed in the pattern. Is provided. The through hole 31 is a hollow cylinder as shown in FIG. 2B. An electrical contact portion 32 made of 25 μm copper is formed on the inner peripheral surface of the through hole 31 by plating. The finished diameter of the through hole 31 after the plating process is 2.65 mm. These values are for reference only, and of course different values can be taken.
Further, a water-soluble flux is applied to the patterns on both sides of the printed circuit board 30 and the inner wall of the through hole, that is, the surface of the contact portion 32 on the inner periphery of the through hole 31 to prevent copper oxidation.

FIG. 3 is a diagram showing a deformed state of the press-fit terminal 11 in a state where the press-fit terminal 11 having the above-described configuration is inserted into the through hole 31 of the printed circuit board 30 that is the female electrode. When the press fit portion 12 of the press fit terminal 11 is inserted into the through hole 31, the first opening 13a, the second opening 13b, and the third opening 13c are compressed and deformed. At this time, the first connecting portion 14 and the second connecting portion 15 are bent and deformed as illustrated in the present embodiment. Therefore, the pressing force is generated in the press contact portions 16a and 16b in the parallel portion 27 of the press fit portion 12 by the elastic force, and the contact force of the press contact portions 16a and 16b to the inner wall of the through hole 31 is increased. .
Further, by providing the first connecting portion 14 and the second connecting portion 15, the outer surfaces of the press contact portions 16 a and 16 b of the press-fit terminal 11 and the inner wall of the through hole 31 can be kept parallel. Therefore, the outer surfaces of the press contact portions 16a and 16b and the inner wall of the through hole 31 can be reliably contacted and the contact area can be ensured.

By increasing the contact force in this way, the contact area between the pressure contact portions 16a and 16b and the through hole 31 is also increased, the connection reliability between them can be improved, and the life can be extended.
That is, when the press-fit terminal 11 is inserted into the through hole 31, the second opening 13b in the press-fit portion 12 is disposed at the center portion of the through-hole 31 in the thickness direction 30a of the printed circuit board 30. The pressure contact portions 16a and 16b can generate a uniform contact force on the entire surface of the inner wall of the through hole 31 in the thickness direction 30a. Therefore, the contact area between the press contact portions 16a and 16b and the through hole 31 can be increased. The contact area increases as the contact force increases.

  By increasing the contact area, the contact resistance between the pressure contact portions 16a and 16b and the inner wall of the through hole 31 is reduced, and even when a large current is passed through the press-fit terminal 11, heat generation at the contact portion can be suppressed. Therefore, the reliability to the temperature cycle is increased, and a connection with higher long-term reliability can be obtained as compared with the conventional case.

  In addition, since the contact force, that is, the pressure contact force can be improved, the press-fit terminal 11 can be manufactured using a material having a low yield stress and a low spring property such as pure copper, that is, a material having a low electrical resistivity. It is possible to handle large currents.

  Further, it is desirable that the length L7 of the second opening 13b in the axial direction 29a is larger than the length L8 of the other first opening 13a and the third opening 13c. By doing in this way, the 1st connection part 14 and the 2nd connection part 15 will be arrange | positioned in the position away from the center of the through hole 31 in the said thickness direction 30a after insertion. Therefore, after the press-fit terminal 11 is inserted into the through hole 31, the press contact portions 16a, 16b and the inner wall of the through hole 31 are kept parallel, and the press contact portion 16a is evenly distributed over the entire length of the through hole 31 in the thickness direction 30a. , 16b can be contacted. Further, the press-fit terminal 11 is difficult to be removed from the through hole 31. Also from this point, the contact area between the pressure contact portions 16a and 16b and the inner wall of the through hole 31 is increased, and the contact resistance is reduced. Therefore, a large current can be applied to the press-fit terminal 11, and high reliability is achieved. Can be obtained.

  In this embodiment, the press-fit terminal 11 is inserted with a deviation from the center of the through hole 31 by providing the three openings 13 a to 13 c, that is, by providing the first connecting portion 14 and the second connecting portion 15. Even if it does, as long as the front-end | tip part 18b of the press fit terminal 11 enters into the through hole 31, the deformation | transformation of the opening 13a-13c to the said orthogonal direction 29b will be suppressed, and insertion stability will improve. Therefore, in the conventional general press-fit terminal, the dimensional accuracy of the jig for fixing the terminal for insertion into the through hole is severe, and the jig manufacturing cost may be high. The terminal 11 can be inserted without using a high-precision jig, and the contact force after insertion is maintained.

  Further, after the press-fit terminal 11 is inserted into the through hole 31, the first connecting portion 14 is disposed above the center of the through hole 31 in the thickness direction 30a, and the second connecting portion 15 is disposed below the center. As long as it is sufficient, the press contact portions 16a and 16b can give a sufficient contact force to the inner wall of the through hole 31, the contact area can be increased, and the contact resistance can be reduced. Thus, the accuracy of the insertion position of the press-fit terminal 11 with respect to the through hole 31 in the thickness direction 30a may be worse than that in the past.

  Further, it is desirable that the thickness L1 (FIG. 1A) of the first connecting portion 14 and the second connecting portion 15 has a sufficient size to generate a bending elastic force.

  By applying, for example, soft tin plating to the press-fit terminal 11, even if the surface of the terminal is oxidized, the surface is plastically deformed when the terminal is inserted, and the oxide layer moves, and good contact can be obtained. In addition, regarding the printed circuit board 30, tin is bonded to each other by applying tin plating instead of the water-soluble flux so that the contact portion between the printed circuit board 30 and the press-fit terminal 11 becomes tin plating. , Contact resistance is reduced.

  Further, when the press-fit terminal 11 is used in a vibrating environment or in a high-temperature environment, it is preferable to use a material having good spring properties such as phosphor bronze or beryllium copper. Furthermore, if a material having a high spring property is used, the electrical resistivity of the terminal is increased, and there is a possibility that the printed circuit board and the electronic component are heated due to heat generation of the terminal when a large current is passed. In that case, the material of the press-fit terminal 11 is a clad material such as copper-stainless steel-copper, so that the electrical resistivity of the terminal can be lowered and the spring property can be improved, while suppressing heat generation. It becomes possible to improve reliability.

  Moreover, in this embodiment mentioned above, it is the structure which has three openings, the 1st opening 13a, the 2nd opening 13b, and the 3rd opening 13c, ie, the structure which has the 1st connection part 14 and the one 2nd connection part 15. FIG. However, for example, it is also possible to provide four or more openings, that is, a number of connecting portions that is one less than the number of openings. In this case, the structure which provides the some 2nd connection part 15 is taken, and it becomes the structure by which the some 2nd opening 13b is formed with respect to the 1st opening 13a and the 3rd opening 13c one by one.

  By configuring in this way, the contact force with respect to the through hole 31 is received by a larger number of connecting portions, so the range of elastic force that can be covered by each connecting portion is increased, and the distance between the bending fulcrums between the connecting portions is shortened. As a result, the contact force is increased, the reliability is improved, and the current can be further increased.

  When the numerical aperture is an even number, after insertion of the terminal, a connecting portion (corresponding to the second connecting portion 15) existing between the two openings located in the central portion of the through hole 31 in the thickness direction 30a is It is desirable to be located at the center of the through hole 31 in the thickness direction 30a. When the numerical aperture is an odd number, the middle opening (corresponding to the second opening 13b described above) is applied to the central portion of the through hole 31 in the thickness direction 30a after insertion, as in the above-described embodiment. It is desirable to be positioned as follows.

Embodiment 2. FIG.
In the press-fit terminal 11 in the first embodiment described above, as shown in FIG. 1A, each of the first connecting portion 14 and the second connecting portion 15 is already connected to the opposing pressure contact portions 16a and 16b in the non-inserted state. It is a form made. On the other hand, in the second embodiment, as shown in FIG. 4, in the non-inserted state, the connecting portion is not connected to the opposing pressure contact portions 16a and 16b. This will be described in detail below.

  4 and 5 show the press-fit portion 12 of the press-fit terminal 61 in the second embodiment. The difference between the press-fit terminal 61 and the press-fit terminal 11 in the first embodiment is the portion related to the connecting portion as described above, and other configurations, terminal materials, and external dimensions of the press-fit terminal 61 are as follows. The same applies to the press-fit terminal 11 in the first embodiment. Therefore, the description here is omitted.

  In the press-fit terminal 61, first connection portions 19a and 19b corresponding to the first connection portion 14 in the press-fit terminal 11 and second connection portions 20a and 20b corresponding to the second connection portion 15 are formed. . That is, what divided | segmented the 1st connection part 14 by providing a slit in the center part of the 1st connection part 14 is equivalent to the 1st connection parts 19a and 19b in the press fit terminal 61, and the center of the 2nd connection part 15 is provided. What divided | segmented the 2nd connection part 15 by providing a slit in a part is equivalent to the 2nd connection parts 20a and 20b in the press fit terminal 61. FIG. Thus, the 1st connection part 19a and the 1st connection part 19b form the 1st slit 19c, and the 2nd connection part 20a and the 2nd connection part 20b form the 2nd slit 20c. The length L9 of the first slit 19c and the second slit 20c in the orthogonal direction 29b is smaller than the width dimension L10 of the second opening 13b in the orthogonal direction 29b, as shown in the figure. The first connecting portion 19a and the second connecting portion 20a are projected along the orthogonal direction 29b from the pressing portion 16a toward the pressing portion 16b, and the first connecting portion 19b and the second connecting portion 20b are pressed. It protrudes along the orthogonal direction 29b from the portion 16b toward the press contact portion 16a.

  As an example, the length L9 of the first slit 19c and the second slit 20c is 0.3 mm, and the height of the first connecting portions 19a and 19b and the second connecting portions 20a and 20b in the orthogonal direction 29b. L2 is 0.2 mm, for example, and the width L3 in the axial direction 29a of the first connecting portions 19a and 19b and the second connecting portions 20a and 20b is 0.5 mm.

  The press-fit terminal 61 according to the second embodiment configured as described above is inserted into the through hole 31 in the same manner as the press-fit terminal 11 according to the first embodiment. As a result of the insertion operation, the pressure contact parts 16a and 16b move so as to approach each other, and as shown in FIG. 5, the first connection part 19a and the first connection part 19b come into contact with each other, and the second connection part 20a and the second connection part The press-fit terminal 61 is press-fitted into the through hole 31 by contacting the connecting portion 20b. The operation of the press-fit terminal 61 relating to such an insertion operation will be described in detail below.

  In the state before insertion, as shown in FIG. 4, the press contact portions 16a and 16b have a double-supported beam structure with a fulcrum distance L4 between the fulcrum A on the base portion 18a side and the fulcrum B on the tip end portion 18b side. The fulcrums of deformation of the pressure contact portions 16a and 16b in the initial stage of insertion into the through hole 31 are the fulcrum A and the fulcrum B. Therefore, by increasing the distance L4 between the fulcrums A and B, the insertion force at the initial insertion of the press-fit terminal 61 can be reduced, and buckling of the press-fit terminal 61 at the time of insertion can be prevented, Furthermore, the distance between the fulcrums of bending becomes large, and the contact force with respect to the inner wall of the through hole 31 of the press-fit terminal 61 in the initial stage of insertion can be reduced.

  Further, as described in the first embodiment, the press-fit terminals 11 and 61 can be made of a soft material having a low yield stress and low spring property such as pure copper, but are made of a soft material. Even in this case, by adopting the configuration of the press-fit terminal 61, buckling during insertion can be prevented as described above, and insertion into the through hole 31 becomes possible.

  With these effects, it is possible to prevent the whitening phenomenon caused by delamination due to the compressive stress of the printed circuit board 30, plating scraping and plating peeling during insertion, preventing damage to the press-fit terminals 61 and the through holes 31, The withstand voltage during use can be normally maintained, and the reliability of the printed circuit board 30 can be improved. Furthermore, since plating scraping can be reduced, the plating on the inner wall of the through hole 31 can be made thin, and the substrate cost can be reduced.

  When the terminal insertion is further continued with the reduced insertion force, the second connecting portion 20a and the second connecting portion 20b of the press-fit terminal 61 come into contact with each other from the middle to the latter half of the insertion. The first connecting portion 19a and the first connecting portion 19b in the fit terminal 61 come into contact with each other. Thus, the 1st opening 13a, the 2nd opening 13b, and the 3rd opening 13c are formed because the 2nd connecting parts 20a and 20b contact, and the 1st connecting parts 19a and 19b contact.

  As described above, in the second embodiment, the second connecting portions 20a and 20b and the first connecting portions 19a and 19b are in contact with each other in the latter half of the insertion. Therefore, since the time during which the pressure contact portions 16a and 16b apply the contact force to the through hole 31 during insertion is shorter than in the case of the first embodiment, the plating of the inner wall of the through hole and the whitening of the substrate can be reduced. It can be suppressed as much as possible.

  Moreover, the contact force by compression of 2nd connection part 20a, 20b and 1st connection part 19a, 19b arises by taking the structure of this Embodiment 2. FIG. Further, in the non-insertion state and the initial insertion state, the pressure contact portions 16a and 16b have a doubly supported beam structure with a distance L4 between the fulcrum A on the base portion 18a side and the fulcrum B on the distal end portion 18b side. From the middle, the fulcrum A on the base 18a side shifts to the fulcrum C, and the fulcrum B on the tip end 18b side shifts to the fulcrum D. Here, the fulcrum C is the contact portion of the first connecting portions 19a and 19b, and the fulcrum D is the contact portion of the second connecting portions 20a and 20b. Therefore, the press contact portions 16a and 16b have a double-supported beam structure with a fulcrum distance L5 shorter than the distance L4. As described above, since the distance between the fulcrums of deflection is shortened from the middle of insertion, the contact force of the press-fit terminal 61 with respect to the through hole 31 is enhanced.

  In addition, since the press contact portions 16a and 16b exert a contact force on the inner wall of the through hole 31 by the fulcrum C and the fulcrum D, the length of the fulcrum distance L4 between the fulcrum A and the fulcrum B is as follows. If it is larger than the distance L5 between fulcrums with D, it can be changed freely. When the distance L4 between the fulcrums A and B is relatively large, the insertion force at the initial stage of insertion is reduced.

  Further, in order to flow a large current, it is necessary to increase the cross-sectional area of the terminal in order to reduce the electrical resistance. For this purpose, the cross-sectional area of the pressure contact portions 16a and 16b in the parallel portion 27 must be increased. . Generally, when such a terminal is inserted into the through hole 31, since the rigidity of the press contact portion is large, normal insertion cannot be performed unless the distance L4 between the fulcrums A and B is made very large. However, according to the configuration of the second embodiment, the distance L4 can be set to a desired length even when the cross-sectional areas of the pressure contact portions 16a and 16b are increased, and after the insertion, An appropriate contact force can be maintained by the effect of contact of the connecting portions 19a and 19b and the second connecting portions 20a and 20b.

  In addition, about the length relationship of each opening 13a-13c in the said axial direction 29a, the relationship demonstrated in Embodiment 1 can be applied also to the press fit terminal 61 of Embodiment 2, and the effect by it can also be acquired. it can.

  As an example, the height L2 of the first connecting portions 19a and 19b and the second connecting portions 20a and 20b is set to 0.2 mm, for example, that is, the first connecting portion 19a and the first connecting portion 19b. The distance of the first slit 19c between the second connecting portion 20a and the second slit 20c between the second connecting portion 20a and the second connecting portion 20b is set to 0.6 mm, so that the through hole 31 of the printed circuit board 30 is formed. The diameter can be made as small as 2.4 mm, and can be made smaller than the general diameter of 2.7 mm exemplified in the first embodiment. In this way, by dividing the connecting portion by the slits 19c and 20c, the height L2 of the divided connecting portion can be changed. Therefore, the press-fit terminal 61 can correspond to the through-holes 31 of various diameters, and the press-fit terminal can be used for a through-hole for inserting a conventional soldering terminal.

  Further, as an example, when the width L3 of the first connecting portions 19a and 19b and the second connecting portions 20a and 20b is set to 0.7 mm, for example, and larger than 0.5 mm exemplified in the first embodiment, the insertion is performed. The contact force with respect to the subsequent through hole 31 can be increased. Further, when the width L3 is, for example, 0.3 mm and is smaller than 0.5 mm, the contact force with respect to the through hole 31 after insertion can be reduced. In this way, by changing the width dimensions of the first connecting portions 19a and 19b and the second connecting portions 20a and 20b, it is possible to adjust the necessary contact force depending on the product. Therefore, the problem that the contact force is too strong and the printed circuit board 30 is whitened can be eliminated, and as a result, the reliability can be further improved.

  In addition, it is desirable that the contact surfaces of the first connecting portion 19a and the first connecting portion 19b and the contact surfaces of the second connecting portion 20a and the second connecting portion 20b are parallel to each other. By doing so, the entire contact surface can be contacted, so that the maximum contact force can be generated. Therefore, the contact force between the press-fit terminal 61 and the through hole 31 is increased, and the contact area is also increased, so that the reliability can be improved.

  When the distance L5 between the fulcrums C and D is the same as the thickness of the printed circuit board 30, for example, 1.6 mm, the first connecting portions 19a and 19b and the second connecting portions 20a and 20b are formed in the through holes 31. Since the contact force is applied at both end portions in the thickness direction 30a, the contact area between the pressure contact portions 16a, 16b and the inner wall of the through hole 31 becomes the largest. Furthermore, even if the press-fit terminal 61 receives an external force in the orthogonal direction 29b after the insertion, the press-fit terminal 61 is difficult to be removed from the through hole 31 and becomes a good contact portion.

  The various modifications to the press-fit terminal 11 in the first embodiment described above can also be applied to the press-fit terminal 61 in the second embodiment.

Embodiment 3 FIG.
As shown in FIGS. 6A and 6B, the press-fit terminals 62 and 65 in the third embodiment correspond to a modification of the press-fit terminal 61 in the second embodiment described above, and the first connection in the press-fit terminal 61. It has the deformation | transformation structure of part 19a, 19b and 2nd connection part 20a, 20b. In addition, since the other structure in the press fit terminals 62 and 65 in this Embodiment 3 is the same as the structure of the press fit terminal 61 of Embodiment 2 mentioned above, description here is abbreviate | omitted. Various modifications described in the second embodiment can be applied to the press-fit terminals 62 and 65 in the third embodiment.

The first connecting portions 19a and 19b and the second connecting portions 20a and 20b in the press-fit terminal 61 of the second embodiment extend in parallel to the orthogonal direction 29b, and as shown in FIG. Is inserted in the through hole 31, the first connecting portions 19a and 19b and the second connecting portions 20a and 20b are arranged in parallel.
On the other hand, in the press-fit terminal 62 of the third embodiment shown in FIG. 6A, the first connecting portion 63a and the first connecting portion 63b are non-parallel in the orthogonal direction 29b and are inclined toward the base portion 18a. The second connecting portion 64a and the second connecting portion 64b are non-parallel in the orthogonal direction 29b, and extend while inclining toward the tip end portion 18b. The first connecting portions 63a and 63b are portions corresponding to the first connecting portions 19a and 19b, and the second connecting portions 64a and 64b are portions corresponding to the second connecting portions 20a and 20b. Therefore, in a state where the press-fit terminal 62 of the third embodiment is inserted into the through hole 31, the first connecting portions 63a and 63b that are in contact with each other and the second connecting portions 64a and 64b that are in contact with each other are: They are arranged non-parallel to each other.

  As described above, in the inserted state, the first connecting portions 63a and 63b that are in contact with each other and the second connecting portions 64a and 64b that are in contact with each other may be arranged non-parallel to each other. 63b and the inclination directions of the second connecting portions 64a and 64b are not limited to the illustrated form. That is, in FIG. 6A, the first connecting portions 63a and 63b and the second connecting portions 64a and 64b are inclined in opposite directions, but may be inclined in the same direction. However, in any case, the first connecting portion 63a and the first connecting portion 63b are inclined in the same direction, that is, the base portion 18a side or the distal end portion 18b side, and the second connecting portion 64a and the second connecting portion 64b. Shall be inclined in the same direction.

  The press-fit terminal 62 having the above-described configuration exhibits the effects exhibited by the press-fit terminal 61 of the above-described second embodiment, and further, the first connection parts 63a and 63b and the second connection part that are in contact with each other in the inserted state. Each of 64a and 64b has a chevron shape that is convex in the axial direction 29a, and has a shape similar to that of the press-fit terminal 11 of the first embodiment shown in FIG. That is, the press-fit terminal 62 of the third embodiment has both the effects of the press-fit terminals 11 and 61 of the first and second embodiments, and can maintain a higher contact force after insertion. It becomes possible. As a result, the contact resistance between the press-fit terminal 62 and the inner wall of the through hole 31 is further reduced, and the heat generated when a large current is passed is greatly reduced, so that a large current can be easily handled.

  Furthermore, in the inserted state as described above, the first connecting portions 63a and 63b and the second connecting portions 64a and 64b that are in contact with each other have a mountain shape, and the elastic region after deformation becomes large. Therefore, in the non-insertion state, the first slit 19c formed between the first connection portion 63a and the first connection portion 63b, and the second slit formed between the second connection portion 64a and the second connection portion 64b. Even if the distance of 20c in the orthogonal direction 29b is, for example, 0.3 mm, the through-hole diameter can be made smaller than the above-described general 2.7 mm, for example, 2.5 mm. As described above, under the condition that the inner diameter of the through hole 31 is smaller than the distance in the orthogonal direction 29b between the press contact portions 16a and 16b while maintaining the contact force of the press fit terminal 62 with respect to the through hole 31. A wider setting is possible. That is, the press-fit terminal 62 can correspond to the through holes 31 having various inner diameters.

  Further, in the press-fit terminal 65 shown in FIG. 6B, the first connecting portions 66a and 66b and the second connecting portions, which are portions corresponding to the first connecting portions 19a and 19b and the second connecting portions 20a and 20b, respectively. 67a, 67b. The first connecting portions 66a and 66b and the second connecting portions 67a and 67b extend along the orthogonal direction 29b, respectively, but the first connecting portion 66a, the first connecting portion 66b, the second connecting portion 67a, and Each of the 2nd connection part 67b has the thick part 68 in the junction part with the press-contact part 16a, 16b. The thick portion 68 is provided only on one side of the joining portion in the axial direction 29a. Such a thick portion 68 functions so that each of the connecting portions 66a, 66b, 67a, 67b can be deformed, for example, can be tilted to the opposite side of the thick portion 68 in the axial direction 29a. The thick portion 68 only needs to perform such a function, and is not limited to the illustrated form.

  Further, in the axial direction 29a, as long as the first connecting part 66a and the first connecting part 66b are deformed in the same direction, and the second connecting part 66a and the second connecting part 66b are deformed in the same direction, the first connecting part 66a, It does not matter whether 66b and the second connecting portions 67a and 67b are deformed in the same direction or in different directions.

In the press-fit terminal 65 configured as described above, the first connecting portions 66a and 66b and the second connecting portions 67a and 67b are each configured to extend along the orthogonal direction 29b, that is, in practice. As in the configuration of the second embodiment, in each of the first connecting portions 66a and 66b and the second connecting portions 67a and 67b, even if the fulcrum of deformation and the contact portion are in a straight line, the inserted state That is, in a state where the first connecting portion 66a and the first connecting portion 66b are in contact with each other and the second connecting portion 67a and the second connecting portion 67b are in contact with each other, the first connecting portions 66a and 66b and the second connecting portion are included. 67a and 67b can be deformed into a mountain shape.
Therefore, the press-fit terminal 65 can also exhibit the same effect as the press-fit terminal 62 shown in FIG. 6A.

Embodiment 4 FIG.
A press-fit terminal 71 according to the fourth embodiment shown in FIG. 7 corresponds to a modification of the press-fit terminal 61 according to the second embodiment described above. That is, in the press-fit terminal 61 according to the second embodiment, the first slit 19c and the second slit 20c are provided in the center portions of the first connecting portion and the second connecting portion, and the first connecting portions 19a, 19b, and Two connecting portions 20a and 20b were formed. On the other hand, in the press-fit terminal 71 according to the fourth embodiment, the first slit 19c is provided between the first connecting portion 72 and the press contact portion 16b, and the second slit is provided between the second connecting portion 73 and the press contact portion 16b. A slit 20c is provided. In addition, since the other structure in the press fit terminal 71 in this Embodiment 4 is the same as the structure of the press fit terminal 61 of Embodiment 2 mentioned above, description here is abbreviate | omitted.

In the present embodiment, the first connecting part 72 and the second connecting part 73 are formed integrally with the press contact part 16a. The first slit 19c and the second slit 20c are also formed in the pressure contact portion 16b in the orthogonal direction 29b as illustrated in the present embodiment. Therefore, the press contact portion 16 b is provided with a recess 74 as a receiving portion corresponding to the first connecting portion 72, and a recess 75 as a receiving portion corresponding to the second connecting portion 73.
In contrast to the mode shown in FIG. 7, the first connecting portion 72 and the second connecting portion 73 may be formed integrally with the press contact portion 16b, and the recess 74 and the recess 75 may be formed in the press contact portion 16a. .

  The press-fit terminal 71 in Embodiment 4 formed in this way is inserted into the through hole 31 as shown in FIG. 8, the first connecting portion 72 is engaged with the recess 74, and the second connecting portion 73 is the recess. 75 is engaged.

  The press-fit terminal 71 according to the fourth embodiment has the effect of the press-fit terminal 61 according to the second embodiment described above. In addition, by forming the recesses 74 and 75 in the pressure contact portion 16a or 16b, the tips of the first connecting portion 72 and the second connecting portion 73 can be engaged. Therefore, when the recesses 74 and 75 are not provided, the size of the press-fit terminal 71 varies due to mass production, and the tips of the first connecting portion 72 and the second connecting portion 73 slide on the inner surface 16d of the press contact portion 16b. Therefore, a situation where the contact force assumed by the press contact portions 16a and 16b is not generated is also assumed. However, according to the fourth embodiment, it is possible to reliably generate a desired contact force regardless of variations in dimensions of the press-fit terminals 71.

  The recesses 74 and 75 do not have to be completely recessed, for example, and the respective distal ends of the divided first connecting portion 72 and second connecting portion 73 are engaged so that the press-fit terminal 71 is connected to the through hole 31. It is sufficient that the above-mentioned engagement is not disengaged in the use environment after being inserted into the housing.

  Further, the extending direction of the recesses 74 and 75 may not be parallel to the orthogonal direction 29b. For example, by inclining with respect to the orthogonal direction 29b, the first connecting portion 72 and the second connecting portion 73 can be deformed so as to bend along the extending direction of the recesses 74 and 75. According to such a structure, in addition to the contact force by compression of the 1st connection part 72 and the 2nd connection part 73, the contact force by bending is added and the contact force is further strengthened.

  Further, the various modifications described in the second embodiment can be applied to the press-fit terminal 71 in the fourth embodiment.

Embodiment 5 FIG.
The press-fit terminal 77 shown in FIG. 9 has substantially the same configuration as the press-fit terminal 61 of the second embodiment described with reference to FIG. 4, but is different only in that it has a base separation groove 78. A press-fit terminal 79 shown in FIG. 10A has substantially the same configuration as the press-fit terminal 71 of the fourth embodiment described with reference to FIG. 7, but is different only in that the base part separating groove 78 is provided.
9 and 10A, the base separation groove 78 is provided between the pressure contact portion 16b and the base portion 18a. However, the base separation groove 78 may be provided between the pressure contact portion 16a and the base portion 18a. Good.

  The press-fit terminals 77 and 79 according to the fifth embodiment configured as described above have the effect of the press-fit terminals 61 according to the second embodiment described above. Further, regarding the effect during and after insertion into the through hole 31, the press-fit terminal 77 has the same effect as the press-fit terminal 61 of the second embodiment, and the press-fit terminal 79 has the same effect as the fourth embodiment. The same effect as that of the press-fit terminal 71 can be obtained.

An example of a method for manufacturing the press-fit terminals 77 and 79 in the fifth embodiment will be described using the press-fit terminal 79 as an example. FIG. 10B shows the shape of the press-fit terminal 79 after finishing the outer shape processing.
After the shape shown in FIG. 10B is manufactured, the press-fit terminal 79 shown in FIG. 10A is obtained by bending the press contact portion 16b with the position E shown in FIG. 10B as a fulcrum. Since the tip 18b is plastically deformed by bending, heat treatment is performed to improve elasticity.

  By having the base separation groove 78 like the press-fit terminals 77 and 79 in the fifth embodiment, the press contact portions 16a and 16b can be opened and closed even in press processing which is easy to mass-produce but difficult to perform minute processing. By doing so, the processing becomes very easy and the productivity of the terminal is greatly improved. Further, in the case of the press-fit terminal 77 shown in FIG. 9, the dimensions such as the height L2 and the width L3 of the divided first connecting portions 19a and 19b and second connecting portions 20a and 20b are designed and manufactured regardless of processing constraints. can do. For example, the dimension of the first slit 19c between the first connecting part 19a and the first connecting part 19b and the second slit 20c between the second connecting part 20a and the second connecting part 20b is 0.1 mm or the like. When it is desired to set a small size, it is difficult to produce by press working, but since the press contact portions 16a and 16b are configured to be openable and closable, processing can be easily performed. Also in the press-fit terminal 79 shown in FIG. 10A, similarly to the press-fit terminal 77, the dimensions of the first slit 19 c and the second slit 20 c and the height dimensions of the first connecting portion 72 and the second connecting portion 73 are set. Thus, it is possible to design and manufacture without depending on processing constraints.

  Further, as described in the fourth embodiment, the recesses 74 and 75 serving as the receiving portions are formed in a state of being recessed from the inner surface 16d of the press contact portion 16b. Therefore, in the press-fit terminal 79 shown in FIG. 10A, the first connecting portion 72 and the second connecting portion 73 are provided with the recesses 74 and 75 even if a small dimensional error during mass production or a deviation of the bending position E occurs. Can be applied to the inner wall of the through-hole 31 after insertion.

Embodiment 6 FIG.
The press-fit terminal 81 in the sixth embodiment shown in FIG. 11 has substantially the same configuration as the press-fit terminal 61 in the second embodiment described with reference to FIG. 4, but only in that the tip separation groove 82 is formed. Different. Other configurations of the press-fit terminal 81 are the same as those of the press-fit terminal 61.

  The press-fit terminal 81 according to the sixth embodiment configured as described above has the effect of the press-fit terminal 61 according to the second embodiment described above. Further, the effect during and after insertion into the through hole 31 is the same as the effect exhibited by the press-fit terminal 61.

  Furthermore, the press-fit terminal 81 according to the sixth embodiment can facilitate processing when manufacturing the press-fit terminal. For example, when the divided first connecting portions 19a and 19b and the second connecting portions 20a and 20b in the press-fit terminal 61 of the second embodiment are manufactured, press processing is performed in two stages. First, in the first stage, the terminal outline and the first to third openings are pressed, and in the second stage, the first slit 19c and the second slit 20c are processed to divide each connecting portion. In the press-fit terminal 81 according to the sixth embodiment, the tip cutting groove 82 is formed at the same time as the first slit 19c and the second slit 20c in the second-stage pressing process, so that the pressing jig can be simplified. Thus, it becomes possible to facilitate press working.

  By having the tip separation groove 82, in the initial stage of inserting the press-fit terminal 81 into the through hole 31, the contact force with respect to the printed circuit board 30 or the inner wall of the through hole 31 can be further reduced. Scraping of plating can be suppressed.

  In addition, during the insertion, when the divided first connecting portions 19a and 19b and the second connecting portions 20a and 20b come into contact with each other, the press contact portions 16a and 16b separated by the tip separation groove 82 also come into contact. By doing in this way, the contact part of press-contact part 16a, 16b in the front-end | tip part 18b can also increase the contact force with respect to the inner wall of the through-hole 31 of the press-contact part 16a, 16b after insertion. Therefore, compared with the press-fit terminal 61 according to the second embodiment, the press-fit terminal 81 according to the sixth embodiment can further increase the contact force.

  In addition, it is also possible to form a press-fit terminal by appropriately combining the configurations shown in the first to sixth embodiments.

Embodiment 7 FIG.
12A and 12B and FIGS. 13A and 13B show an example of the power semiconductor devices 40 and 41 including the press-fit terminal 11 shown in the first embodiment. Of course, in the power semiconductor devices 40 and 41, the press-fit terminals 61, 62, 65, 71, 77, 79, 81 described in the second to sixth embodiments may be used.

The power semiconductor device 40 shown in FIGS. 12A and 12B is a transfer type power semiconductor device. The press-fit terminal 11 has a structure protruding from both side surfaces 40 a of the power semiconductor device 40.
Conventionally, it is not a press-fit terminal 11 but a pin terminal, and the connection with the through hole is performed by soldering. Since the pin terminal for flowing a large current has a large cross-sectional area, there is a problem that the heat capacity becomes large and solder connection by a technique such as flow soldering is difficult. For this reason, manual soldering by a skilled worker is required, which increases the cost. In particular, since power semiconductor devices with advanced functions are multi-pinned, connecting them by hand soldering has a problem of a significant cost increase.

  On the other hand, in the power semiconductor device using the press-fit terminal according to each of the above-described embodiments, the press-fit terminal may be inserted into the through hole 31, and it is not necessary to heat and melt the solder. If available, it can be easily connected to the substrate at room temperature. Therefore, according to the power semiconductor devices 40 and 41 according to the seventh embodiment, there is an advantage that the productivity is improved as compared with the conventional semiconductor device using the soldering pin terminal.

  13A and 13B show a case-type power semiconductor device 41. The press-fit terminal 11 has a structure that protrudes from the upper surface 41a of the case. Therefore, in this structure, there is no need to bend the terminal 11 as in the transfer type shown in FIGS. 12A and 12B, so that there is an advantage that the positioning property when the terminal 11 is inserted into the through hole 31 is improved. Furthermore, since there is no need to bend the terminal 11, the terminal 11 can be easily set up. Furthermore, since soldering is not necessary, the distance between the terminals 11 can be reduced, and the power semiconductor device can be reduced in size.

11 Press-fit terminal, 13a 1st opening, 13b 2nd opening,
13c 3rd opening, 14 1st connection part, 15 2nd connection part,
19a, 19b 1st connection part, 20a, 20b 2nd connection part,
19c 1st slit, 20c 2nd slit, 31 through hole,
40, 41 Power semiconductor device,
61 press-fit terminals, 62 press-fit terminals,
63a, 63b first connecting part, 64a, 64b second connecting part,
65 press-fit terminals, 66a, 66b first connecting part,
67a, 67b second connecting portion, 71 press-fit terminal, 72 first connecting portion,
73 second connecting portion, 74, 75 recess, 77 press-fit terminal,
78 Base separation groove, 79 Press-fit terminal,
81 Press-fit terminal, 82 Tip cutting groove.

Claims (7)

A press-fit terminal having a base portion and a tip portion, press-fitted into the cylindrical conductor portion from the tip portion toward the base side, and electrically connected to the cylindrical conductor portion;
A pair of pressure contact portions provided between the base portion and the distal end portion and arranged to face each other, and pressure contact portions that are inserted into the cylindrical conductor portion and respectively contact the inner surface of the cylindrical conductor portion;
A first connecting portion provided between the press contact portions, connecting the press contact portions, pressing the press contact portion against the inner surface, and forming a first opening with the base;
Provided between the press contact portions and positioned on the tip end side from the first connection portion, connect the press contact portions, press the press contact portion against the inner surface, and at least one between the first connection portions Including at least one second connecting portion that forms a second opening and forms a third opening between the tip portion and the second opening,
The first connecting part is formed between the press contact parts on the base side with respect to the intermediate position between the tip part and the base part,
The second connecting part is formed between the pressure contact parts on the tip part side of the intermediate position between the tip part and the base part,
Each of the first connecting part and the second connecting part is separated through a slit in a state before the press-fit terminal is inserted into the cylindrical conductor part, and the pair of separated first parts The connecting portion and the pair of separated second connecting portions each have a contact surface facing each other,
In the state inserted into the cylindrical conductor portion, the contact surfaces of the first connecting portion are in contact with each other, and the contact surfaces of the second connecting portion are in contact with each other , so that the shaft of the press-fit terminal The pressure contact portion and the inner surface of the cylindrical conductor portion are in contact with each other between the first connection portion and the second connection portion in a direction;
A press-fit terminal characterized by that.   The press-fit terminal according to claim 1, wherein the tip portion is divided by a tip separation groove in a state before the press-fit terminal is inserted into the cylindrical conductor portion.   The press-fit terminal according to claim 1, wherein the first connecting portion and the second connecting portion are further positioned non-parallel.   In a state before the press-fit terminal is inserted into the cylindrical conductor portion, each of the press contact portions is joined at the tip portion, and one press contact portion is divided by a base separating groove at the base portion. The press-fit terminal according to claim 1.   The press-fit terminal according to any one of claims 1 to 4, wherein a length of the second opening in the axial direction of the press-fit terminal is larger than each length of the first opening and the third opening.   The press-fit terminal according to any one of claims 1 to 5, wherein the contact surfaces of the first connecting portion and the second connecting portion are parallel to each other.   A power semiconductor device comprising the press-fit terminal according to claim 1.

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