JP6849077B2 - connector - Google Patents

Description

The techniques disclosed herein relate to connectors.

Conventionally, as a connector in which a terminal fitting is insert-molded, for example, the one of Patent Document 1 is known. The housing of this connector includes a molded body made of synthetic resin, a core made of synthetic resin, and a plurality of terminal fittings. The core is pre-molded prior to molding the housing, and a plurality of terminal through holes penetrating in the front-rear direction are formed.

When molding the housing, the terminal fitting is press-fitted through the terminal through hole of the core, and the lower end of the terminal fitting is fitted into the fixed mold of the mold to fit the terminal fitting and the core into the mold. Position it. Then, by injecting the molten resin into the cavity of the mold at high pressure through the gate, the molded body is molded in a state of being integrated with the core and the terminal fitting.

Japanese Unexamined Patent Publication No. 2005-174697

However, in this technique, since the terminal fitting is fitted to the fixed mold of the mold when the housing is molded, the portion of the terminal fitting that is fitted to the fixed mold of the mold is easily scratched. Moreover, since the core is positioned in the mold via the terminal fitting, the terminal fitting may be deformed by the pressure received by the core from the molten resin, and the terminals may come into contact with each other in the finished state of the housing. ..

The connector according to the technique disclosed in the present specification includes a housing having a primary resin formed by primary molding and a secondary resin formed by secondary molding, and a plurality of bus bars integrally formed with the primary resin. A connector comprising a bus bar group embedded in the secondary resin in a stacked state, wherein the primary resin is arranged in contact with an outer surface in the stacking direction of the bus bar group, and the secondary resin is provided. It is characterized by including an outer layer portion exposed from the resin and an intermediate layer portion sandwiched between the two adjacent bus bars in contact with the two adjacent bus bars.

According to this configuration, since the intermediate layer portion made of the primary resin is sandwiched in a state of being in contact with two adjacent bus bars, the separation distance between the bus bars can be kept constant in the housing. Further, since the outer layer portion is arranged on the outer surface in the stacking direction of the bus bar group, when the secondary resin is secondarily molded, both outer layer portions are sandwiched between the molds to put the bus bar in the mold. Can be fixed. Therefore, since it is not necessary to fix the bus bar group itself to the mold, there is no risk of damaging the bus bar with the mold.

As an embodiment according to the technique disclosed in the present specification, the following configuration is preferable.

(1) The outer layer portion includes a contact portion exposed from the secondary resin and a tapered portion that approaches the bus bar as it spreads from the peripheral edge of the contact portion to the outer periphery.

According to this configuration, when the contact portion is brought into contact with the mold during the secondary molding of the secondary resin and the molten resin is injected from a direction intersecting the overlapping direction of the bus bar, the molten resin hits the tapered portion of the outer layer portion. Since it flows around this, the pressure applied to the outer layer portion from the molten resin can be relieved.

(2) The intermediate layer portion is provided with a fitting recess provided recessed on one side of the two bus bars and a fitting recess provided protruding on the other side of the two bus bars to fit the fitting recess. It is provided with a fitting protrusion that prevents the two bus bars from being misaligned.

According to this configuration, by fitting the fitting recess on one busbar side and the fitting protrusion on the other busbar side, the positions of both busbars are displaced due to the pressure of the molten resin when forming the secondary resin. Can be eliminated.

According to the technique disclosed in the present specification, it is possible to provide a connector that eliminates the misalignment of the bus bar in the secondary molding and does not damage the bus bar.

Front view showing the connector of the embodiment Floor plan showing the connector AA sectional view of FIG. BB sectional view of FIG. Perspective view showing primary resin and busbar Perspective view showing primary resin and busbar Top view showing primary resin and busbar Top view showing primary resin and busbar group Diagram showing the first busbar Diagram showing the second busbar Diagram showing the third busbar

<Embodiment>
An embodiment according to the technique disclosed in the present specification will be described with reference to FIGS. 1 to 11. The connector 1 of this embodiment is a relay connector used in the inverter case. In the following description, the front side in FIG. 1 will be described as the front side, the right side as the right side, and the upper side as the upper side.

The connector 1 includes a substantially rectangular plate-shaped housing 10 that is long on the left and right and six terminals 14 in the external view shown in FIGS. 1 and 2. In the following, only three of the six terminals 14 will be described and illustrated, and the other three terminals will be omitted.

The front surface of the housing 10 (hereinafter referred to as the housing front surface 10F) includes three front side stepped surfaces 10F-1, 10F-2, and 10F-3 that are continuous to the left and right. Most of these stepped surfaces 10F-1 to 3 are covered with the secondary resin 40, and the primary resin 30 (contact portion CL-C described later) embedded in the secondary resin 40 is the secondary resin 40. It is exposed flush with each other. Similarly, the back surface 10B of the housing 10 also has three dorsal stepped surfaces 10B-1, 10B-2, 10B-3, of which two dorsal stepped surfaces 10B-2, 10B-3 are from the secondary resin 40. The primary resin 30 (contact portion CL-C described later) is exposed flush with the secondary resin 40.

As shown in FIG. 2, the terminal 14 projects forward from the front surface 10F of the housing. Each terminal 14 is formed of a metal plate material and has an elongated strip shape. The terminals 14 are distributed on the front surface 10F of the housing so as not to come into contact with each other.

On the other hand, as shown in FIGS. 3 and 4, the housing 10 includes a first bus bar 21, a second bus bar 22, and a third bus bar 23 in which the primary resin 30 and the primary resin 30 are integrally formed, respectively. The group 20 is embedded. The first to third bus bars 21 to 23 are stacked with the primary resin 30 interposed therebetween. In the following, the primary resin 30 sandwiched between the bus bars 21 to 23 is referred to as an intermediate layer portion ML, and the primary resin 30 arranged on the front surface 20F and the back surface 20B of the bus bar group 20 is referred to as an outer layer portion CL. Specifically, among the intermediate layer MLs, the one sandwiched between the first bus bar 21 and the second bus bar 22 is called the first intermediate layer ML1, and the one sandwiched between the second bus bar 22 and the third bus bar 23 is the first. It is called the second intermediate layer part ML2. Further, among the outer layer CLs, the one arranged on the front surface 20F of the bus bar group 20 is referred to as the first outer layer CL1, and the one arranged on the back surface 20B of the bus bar group 20 is referred to as the second outer layer CL2.

As shown in FIGS. 5 and 6, the first to third bus bars 21 to 23 have a long plate shape on the left and right, respectively. As shown in FIG. 7, the first bus bar 21 and the second bus bar 22 are overlapped with the right end of the second bus bar 22 shifted to the right from the right end of the first bus bar 21. Similarly, the second bus bar 22 and the third bus bar 23 are overlapped with the right end of the third bus bar 23 shifted to the right from the right end of the second bus bar 22. In the following, as shown in FIGS. 9 to 11, the area where the first bus bar 21, the second bus bar 22, and the third bus bar 23 are overlapped is referred to as the first area P1 and the second bus bar 22. The area where the two sheets of the third bus bar 23 and the third bus bar 23 are overlapped is called the second area P2, and the area of only the third bus bar 23 is called the third area P3. Further, the area where the first bus bar 21 and the second bus bar 22 are overlapped is referred to as a fourth area P4, and the area of only the first bus bar 21 is referred to as a fifth area P5.

As shown in FIG. 5, the six terminals 14 of the bus bar group 20 described above are provided one by one in each of the first bus bar 21, the second bus bar 22, and the third bus bar 23. Each bus bar 21, 22, 23 and each terminal 14 are integrally formed from one metal plate material by punching or the like, and project forward in a horizontal posture from both ends of each bus bar 2, 22, 23.

The first bus bar 21 is formed with an elongated slit-shaped first relief slit 21A penetrating back and forth. The second bus bar 22 is provided with a second relief slit 22A having the same shape as the first relief slit 21A penetrating back and forth at a position overlapping the first relief slit 21A when viewed from the front. The terminal 14 provided on the third bus bar 23 (hereinafter referred to as a through terminal 14A) is arranged at a position where it can be seen through the first relief slit 21A and the second relief slit 22A when viewed from the front, and the second relief slit 22A and the second relief slit 22A. It penetrates the slit 21A and extends forward.

As shown in FIGS. 9 to 11, the primary resin 30 is dispersedly provided in each of the first to third bus bars 21 to 23. Each primary resin 30 is integrally formed with each bus bar 21 to 23 in the primary molding of the connector 1.
Specifically, the front surface 21F of the first bus bar 21 is provided with the first front resin 31F and projects forward (FIG. 9A), and the back 21B is provided with the first dorsal resin 31B and projects rearward. (Fig. 9 (B)). As shown in FIG. 7, the protruding ends of the primary resins 31F and 31B are flat surfaces parallel to the first bus bar 21.

Similarly, the front surface 22F of the second bus bar 22 is provided with the second front resin 32F and protrudes forward (FIG. 10 (A)), and the back surface 22B of the second bus bar 22 is provided with the second dorsal resin 32B. (Fig. 10 (B)). The protruding ends of the primary resins 32F and 32B are flat surfaces parallel to the second bus bar 22.

Similarly, a third front resin 33F is provided on the front surface 23F of the third bus bar 23 and projects forward (FIG. 11 (A)), and a third dorsal resin 33B is provided on the back 23B of the third bus bar 23. (Fig. 11 (B)). The protruding ends of the primary resins 33F and 33B are flat surfaces parallel to the third bus bar 23.

The height of protrusion of each of the primary resins 31F and 31B from the first bus bar 21, the height of protrusion of each of the primary resins 32F, 32B and 33F from the second bus bar 22, and the height of protrusion of each of the primary resins 33F and 33B from the third bus bar 23. As shown in FIG. 7, the protruding heights of the above are all the same dimensions.

As shown in FIG. 9 (B), the first dorsal resin 31B arranged in the regions P1 and P4, and as shown in FIG. 10 (A), in the regions P1 and P4 of the second front resin 32F. The arranged portion (hereinafter referred to as the second front intermediate resin 32F-ML) and the above-mentioned first intermediate layer portion ML1 in a state where three bus bars 21, 22, 23 are overlapped to form a bus bar group 20. It has become.

As shown in FIG. 7, the first dorsal intermediate resin 31B-ML and the second front intermediate resin 32F-ML are arranged at positions where they do not overlap each other in front perspective when they are arranged so as to face each other. Therefore, in a state where these are combined with each other from the front and back to form the first intermediate layer portion ML1, as shown in FIG. 8B, the protruding end portion ML-C of the second front intermediate resin 32F-ML is the first. One bus bar 21 is in surface contact with the back surface 21B. The first bus bar 21 and the second bus bar 22 are arranged so as to be separated from each other by sandwiching the first intermediate layer portion ML1.

Similarly, as shown in FIG. 10B, the portion of the second dorsal resin 32B arranged in the regions P1 and P2 (hereinafter referred to as the second dorsal intermediate resin 32B-ML) and FIG. 11 (hereinafter referred to as the second dorsal intermediate resin 32B-ML) As shown in A), the portion of the third front resin 33F arranged in the region P1 and the region P2 (hereinafter referred to as the third front intermediate resin 33F-ML) is described above in a state where the bus bar group 20 is formed. It is the second intermediate layer part ML2 of.

The second dorsal intermediate resin 32B-ML and the third front intermediate resin 33F-ML are arranged at positions where they do not overlap each other in front perspective when they are arranged so as to face each other as shown in FIG. Therefore, in a state where these are combined with each other from the front and back to form the second intermediate layer portion ML2, as shown in FIG. 8C, the protruding end portion ML-C of the second dorsal intermediate resin 32B-ML is formed. It is in surface contact with the front surface 23F of the third bus bar 23. The second bus bar 22 and the third bus bar 23 are arranged so as to be separated from each other by being arranged so as to sandwich the second intermediate layer portion ML2.

As shown in FIGS. 9B and 10A, the first intermediate layer portion ML1 (31B, 32F-ML) is located between the first bus bar 21 and the second bus bar 22 (regions P1 and P4). As shown in FIGS. 9 (B) and 10 (A), the first intermediate layer portion ML1 is arranged on the left side and the lower side of the first relief slit 21A and the through terminal 14A. Instead, a space is left for communicating the internal space of the first relief slit 21A with the outside. During the secondary molding of the connector 1, the molten resin flows through this space and is filled between the first relief slit 21A and the through terminal 14A.

Further, the second intermediate layer portion ML2 is arranged so as to fill almost the entire space between the second bus bar 22 and the third bus bar 23 (region P1 and region P2), as shown in FIG. 10 (B). The left side of the second relief slit 22A is a region P4 where the third bus bar 23 cannot be overlapped, and is an open space where the second dorsal resin 32B is not provided. At the time of secondary molding of the connector 1, the molten resin is filled between the second relief slit 22A and the through terminal 14A from the back surface 22B side of the second bus bar 22.

On the other hand, of the primary resin 30, the first front resin 31F arranged in the first region P1 and the fourth region P4 as shown in FIG. 9 (A) and the second resin 30 as shown in FIG. 10 (A). The portion of the front resin 32F arranged in the second region P2 (hereinafter referred to as the second front outer layer resin 32F-CL) and, as shown in FIG. 11 (A), the third region P3 of the third front resin 33F. (Hereinafter referred to as the third front outer layer resin 33F-CL) is the first outer layer portion CL1 described above.

Similarly, as shown in FIG. 10 (B), the portion of the second dorsal resin 32B arranged in the fourth region P4 (hereinafter referred to as the second dorsal outer layer resin 32B-CL) and FIG. 11 (B). ), The third dorsal resin 33B arranged in the first region P1 to the third region P3 is the above-mentioned second outer layer portion CL2.

That is, the bus bar group 20 includes the first outer layer portion CL1 on the front surface 20F and the second outer layer portion CL2 on the back surface 20B in any of the first region P1 to the fourth region P4. Further, in each of the first region P1 to the fourth region P4, at least a part of the first outer layer portion CL1 and at least a part of the second outer layer portion CL2 overlap each other in front fluoroscopy. In particular, in the first region P1, the first outer layer portion CL1-S (see FIG. 9A) and the second outer layer portion CL2-S (FIG. 11 (FIG. 11)) arranged near the upper end and the lower end of the bus bar group 20. B)) overlaps with the three bus bars 21 to 23 and the intermediate layer portions ML1 and ML2 in front perspective.

Each outer layer portion CL (first outer layer portion CL1 and second outer layer portion CL2) is composed of one or a plurality of elongated ridges on the left and right in each region P1 to P3. A gap that serves as a flow path for the molten resin in the secondary molding is secured between the plurality of projecting portions arranged side by side.

During the secondary molding of the connector 1, as shown in FIG. 8A, the protruding end portions of the outer layer portions CL are the bus bar group 20 in each of the first to fourth regions P1 to P4 of the bus bar group 20. It is a contact portion CL-C that comes into contact with a mold (not shown) arranged in front of and behind the above. As a result, in the state after the secondary molding, as shown in FIG. 1, the contact portion CL-C is exposed flush with the secondary resin 40 on the front surface 10F of the housing, and also on the back surface 10B (not shown). , The contact portion CL-C is exposed so as to be flush with the secondary resin 40.

In the present embodiment, in order to prevent the bus bar group 20 from being displaced in the mold, as shown in FIGS. 8A and 8B, the protruding side portion of the outer layer portion CL is the contact portion CL. It is provided with an outer layer tapered portion CL-T (an example of a tapered portion) that approaches each bus bar 21 to 23 as it spreads from the peripheral edge of −C to the outer periphery. The outer layer taper portion CL-T is arranged on the first front resin 31F, the second front outer layer resin 32F-CL, the third front outer layer resin 33F-CL, the second dorsal outer layer resin 32B-CL, and the third dorsal resin 33B. Has been done.

Similarly, in order to prevent the second bus bar 22 from being displaced from the first bus bar 21 and the third bus bar 23 in the bus bar group 20, the protruding side portions of the intermediate layer portion ML are shown in FIGS. 10 (A) to 10 (C). ), The intermediate layer tapered portion ML-T that approaches each bus bar 21 to 23 as it spreads from the peripheral edge of the protruding end portion to the outer periphery is provided. The intermediate layer tapered portion ML-T includes a second front intermediate resin 32F-ML (see FIG. 10 (A)) and a second dorsal intermediate resin 32B-ML (FIG. 10) constituting the left end of the second intermediate layer ML2. (B)).

Further, in order to prevent the second bus bar 22 from being displaced from the first bus bar 21 and the third bus bar 23 in the bus bar group 20, in the present embodiment, one of the two intermediate resins constituting the intermediate layer portion ML is further formed. A circular recessed fitting recess ML-H is formed on the other side, and on the other hand, a truncated cone shape is formed so as to project toward the fitting recess ML-H and the fitting recess ML-H is fitted. A protrusion ML-P is formed. Three fitting recesses ML-H are formed in the second front intermediate resin 32F-ML (see FIG. 10 (A)), and two are formed in the second dorsal intermediate resin 32B-ML (FIG. 10 (A)). 10 (B)). Three fitting protrusions ML-P are formed on the first dorsal intermediate resin 31B-ML (see FIG. 9B), and two are formed on the third front intermediate resin 33F-ML (see FIG. 9B). (See FIG. 11 (A)). In the state where the bus bars are assembled to form the bus bar group 20, as shown in FIGS. 8 (B) and 8 (C), each fitting protrusion ML-P is fitted into the fitting recess ML-H, respectively. ing.

Next, a method of forming the connector 1 according to the present embodiment will be illustrated.

First, the first front resin 31F and the first dorsal resin 31B are formed on the first bus bar 21 and the second front resin 32F and the second dorsal resin 32B are formed on the second bus bar 22 by primary molding. A third front resin 33F and a third dorsal resin 33B are formed on the bus bar 23.

Next, behind the first bus bar 21, the right ends of the second bus bar 22 and the third bus bar 23 are overlapped while being shifted to the right of the front bus bars 21 and 22, respectively. Then, each fitting protrusion ML-P is fitted into each fitting recess ML-H, and the first back side intermediate resin 31B-ML and the second front side intermediate resin 32F-ML are combined with each other and the second The dorsal intermediate resin 32B-ML and the third front intermediate resin 33F-ML are combined with each other to form intermediate layer portions ML1 and ML2, respectively. As a result, the bus bars 21, 22, and 23 are stacked with the intermediate layer portions ML1 and ML2 interposed therebetween, the first outer layer portion CL1 is arranged on the front surface 20F, and the second outer layer portion CL2 is arranged on the back surface 20B. Is obtained.

Next, the bus bar group 20 is arranged in a pair of molds (not shown), the molds are closed from the front and back of the bus bar group 20, and the molds are applied to the outer layer CL in each of the first region to the fourth region P4. Get in touch. Then, the bus bar group 20 is fixed in the mold in each region P1 to P4 in a state of being sandwiched between the molds from the front and back via the outer layer portion CL.

Next, the molten resin is injected and injected from a gate (not shown) provided on the left side of the bus bar group 20 in the mold. Then, the molten resin hits the outer layer tapered portion CL-T of the outer layer portion CL and the intermediate layer tapered portion ML-T of the intermediate layer portion ML, and flows in a direction away from the gate so as to go around them. Then, when the molten resin is filled in the mold and solidified to become the secondary resin 40, when the mold is opened, the primary resin 30 and the bus bar group 20 are embedded in the secondary resin 40, and the outer layer portion CL A connector 1 is obtained in which the contact portion CL-C is flush with the secondary resin 40 and is exposed to the outside.

According to the above configuration, in the gap between the two adjacent bus bars 21 and 22 (22, 23), the intermediate layer portion ML made of the primary resin is in contact with both bus bars 21 and 22 (22, 23). Therefore, the distance between the bus bars 21 and 22 (22, 23) can be kept constant in the housing 10. Further, since the outer layer CL is arranged on the outer surfaces 20F and 20B in the stacking direction of the bus bar group 20, the outer layer CL is brought into contact with the mold when the secondary resin 40 is secondarily molded. Then, the bus bar group 20 can be fixed in the mold. Therefore, since it is not necessary to bring the bus bar group 20 itself into contact with the mold, there is no risk of damaging the bus bars 21 to 23 with the mold.

Further, when the contact portion CL-C is brought into contact with the mold during the secondary molding of the secondary resin 40 and the molten resin is injected from a direction intersecting the overlapping direction of the bus bar group 20, the molten resin is formed on the outer layer portion CL. Since it hits the tapered portion CL-T and flows around it, the pressure received by the outer layer portion CL from the molten resin can be relieved.

Further, by fitting the fitting recess ML-H of one bus bar 22 and the fitting protrusion ML-P of the other bus bars 21 and 23, the pressure of the molten resin causes the secondary resin 40 to be formed. It is possible to eliminate the misalignment of the bus bars 21, 22, and 23.

In the present embodiment, the through terminal 14A of the third bus bar 23 penetrates the second relief slit 22A and the first relief slit 21A and extends forward as described above. When the through terminals 14A arranged in this way are provided, when the positions of the first to third bus bars 21 to 23 are displaced during the secondary molding, the through terminals 14A are released to the opening edges of the slits 22A and 21A. It tends to come into contact with each other, resulting in a defective product in which the bus bars are electrically short-circuited. On the other hand, in the present embodiment, as described above, the outer layer tapered portion CL-T and the intermediate layer tapered portion ML-T are provided, and the intermediate layer portion ML is provided with the fitting recess ML-H and the fitting recess ML. A fitting protrusion ML-P that fits with −H is provided. By these misalignment regulating means, the through terminal 14A can be released and arranged through the slits 22A and 21A without contacting the slits 22A and 21A, and the degree of freedom in the arrangement design of the terminal 14 is remarkably increased.

<Other Embodiments>
The technique disclosed in the present specification is not limited to the embodiments described in the above description and drawings, and can be implemented, for example, in the following embodiments.

(1) In the above embodiment, the bus bar group 20 is composed of three bus bars 21 to 23, but the number of bus bars is not limited to this, and may be two or four or more.

(2) In the above embodiment, the outer layer portion CL is configured to include a tapered outer layer tapered portion CL-T, but instead, the outer layer portion may be configured to include a reverse tapered portion, or the outer layer portion may be provided. The shape may be such that neither the tapered portion nor the reverse tapered portion is provided.

(3) In the above embodiment, the fitting recesses ML-H are provided on the front surface 22F side and the back surface 22B side of the second bus bar 22, respectively, and the fitting protrusions ML-P are provided on the back surface 21B side and the back surface 22B side of the first bus bar 21. The configuration is such that the three bus bars 23 are provided on the front 23F side, respectively, but the arrangement of the fitting recess and the fitting protrusion is not limited to this, and the fitting recess is provided on the back side of the first bus bar and the front side of the third bus bar. The fitting protrusions may be provided on the front side and the back side of the second bus bar. Alternatively, the fitting recess and the fitting protrusion may not be provided. The point is that the bus bars need to be fixed between the two molds without causing misalignment.

(4) In the above embodiment, the intermediate layer portion ML is composed of the primary resins 30 provided on the front surfaces 21F, 22F, 23F and the back surfaces 21B, 22B, 23B of the bus bars 21, 22, 23. Not limited to this, for example, the intermediate layer portion may be formed only by the primary resin provided on the back surface of the first bus bar and the front surface of the third bus bar without providing the primary resin on either the front surface or the back surface of the second bus bar. Good. In short, the intermediate layer portion may be formed between two adjacent bus bars.

30: Primary resin 40: Secondary resin 10: Housing 20: Bus bar group 20F: Front surface (outer surface) of bus bar group
20B: Back side (outer surface) of bus bar group
21, 22, 23: Bus bar CL: Outer layer part CL-C: Contact part CL-T: Outer layer tapered part (tapered part)
ML: Intermediate layer part ML-H: Fitting recess ML-P: Fitting protrusion

Claims (2)

A housing having a primary resin formed by primary molding and a secondary resin formed by secondary molding,
A connector comprising a group of busbars embedded in the secondary resin in a state where a plurality of busbars integrally formed with the primary resin are stacked.
The primary resin is
Arranged in contact with the outer surface of the bus bar group in the stacking direction.
The outer layer exposed from the secondary resin and
An intermediate layer portion sandwiched between the two adjacent bus bars in contact with the two adjacent bus bars is provided.
The intermediate layer portion is provided so as to be recessed on one side of the two bus bars and a fitting recess provided on the other side of the two bus bars so as to be fitted with the fitting recess. Equipped with a fitting protrusion to prevent misalignment of the busbars,
A connector in which one of the two bus bars has a relief slit and the other has a through terminal, and the through terminal penetrates the relief slit. The connector according to claim 1, wherein the outer layer portion includes a contact portion exposed from the secondary resin and a tapered portion that approaches the bus bar as it spreads from the peripheral edge of the contact portion to the outer periphery.

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