JP6569128B2 - Terminal block - Google Patents

Description

  The technique disclosed by this specification is related with a terminal block.

  Conventionally, as a terminal block including a conductive plate that relay-connects a device-side bus bar provided inside a device and a wire-side terminal connected to a terminal of a wire, Japanese Patent Application Laid-Open No. 2012-195065 (Patent Document 1 below) The terminal block described in 1 is known. The terminal block includes a plurality of conductive plates and a connector housing that holds these conductive plates, and a nut accommodating portion that accommodates a nut on the opposite side of the bolt fastening surface of the conductive plate in the connector housing. Is provided. By inserting the nut into the nut housing in advance, placing the wire side terminal on the bolt fastening surface and tightening the bolt, the wire side terminal and the conductive plate are sandwiched between the head of the bolt and the nut. It is connected so that it can conduct.

JP 2012-195065 A

  However, in the terminal block described above, the nut accommodating portion is configured to open forward and upward, and among these, the upper opening is covered by the conductive plate, but the front opening needs to press-fit the nut. It remains open for some reason. In such a case, when the bolt fastening is repeated, the press-fit portion holding the nut is sunk, so that the nut holding force is reduced, and the nut may drop from the front opening.

  A terminal block disclosed in the present specification is a terminal block including a nut, a conductive plate, and a housing having a nut accommodating portion in which the nut is accommodated and holding the conductive plate. The nut housing portion includes a peripheral wall that has an entrance through which the nut enters from above and covers the nut from the side over the entire circumference, and a bottom wall that covers the nut from below. The bottom wall faces the nut accommodating part through the entrance, and the conductive plate has a bolt fastening part in which a bolt hole is formed, and the bolt fastening part is an opening edge of the entrance. It was set as the structure arrange | positioned.

  According to such a configuration, since the bolt fastening portion of the conductive plate is disposed at the opening edge of the entrance of the nut housing portion, the nut is omnidirectional by the bottom wall and the peripheral wall of the nut housing portion and the bolt fastening portion. Will be covered. Therefore, the nut can be held inside the nut housing portion, and the nut can be prevented from falling off.

The terminal block disclosed by this specification is good also as the following structures.
The housing includes a first housing having the nut housing portion, and the first housing holds the conductive plate in a state where the bolt fastening portion is disposed at an opening edge of the entrance. It is good also as a structure which has a rib.
According to such a configuration, the bolt fastening portion can be held at the opening edge of the entrance by the holding rib.

The said housing is good also as a structure provided with the 2nd housing insert-molded by using the said some 1st housing as a core.
If it does in this way, each conductive plate and each 1st housing can be fixed integrally by the 2nd housing.

  According to the terminal block disclosed in the present specification, the nut can be prevented from falling off.

The perspective view of the terminal block in an embodiment Front view of terminal block Plan view of terminal block AA line sectional view in FIG. Perspective view showing components of terminal nut assembly Perspective view of terminal nut assembly Front view of terminal nut assembly Partial enlarged view in FIG. Top view of terminal nut assembly BB sectional view in FIG. CC sectional view in FIG.

<Embodiment>
The embodiment will be described with reference to the drawings of FIGS. The terminal block 10 in the present embodiment is attached to a case of a device (not shown), and relay-connects internal wiring disposed inside the device and external wiring such as a wire harness. The terminal block 10 is formed by insert molding by setting a plurality of terminal nut assemblies 20 shown in FIG. In other words, the terminal block 10 includes a plurality of terminal nut assemblies 20 and a second housing 60 that fixes them together.

  As shown in FIG. 5, the terminal nut assembly 20 includes a terminal 30, a nut 40, and a first housing 50. The terminal 30 is formed by punching a flat conductive plate made of a conductive metal into a predetermined shape and bending it. Further, the terminal 30 has a form extending in a band shape, and a pair of bolt fastening portions 31 are provided at both ends thereof. As illustrated in FIG. 4, an embedded portion 32 embedded in the second housing 60 is provided between the pair of bolt fastening portions 31 in the terminal 30.

  As shown in FIG. 6, the embedded portion 32 is provided with a sealing material application portion 33 to which a sealing material (not shown) is applied over the entire circumference. A pair of partition grooves 34 that serve as marks are provided in the upper and lower sides of the seal material adherent portion 33. Therefore, the region between the pair of partition grooves 34 becomes the sealing material adherent portion 33. When the sealing material adhering portion 33 to which the sealing material is applied is embedded by the second housing 60, the water that has entered the interface between the embedded portion 32 and the second housing 60 can be stopped by the sealing material.

  As shown in FIG. 7, a pair of left and right step portions 35 are provided below the sealing material adherent portion 33 at both side edges of the embedded portion 32. These stepped portions 35 are hooked on the second housing 60 from below, so that the terminals 30 are prevented from coming out upward with respect to the second housing 60. Further, a notch 38 is provided on the upper side of the seal material adherent portion 33 at both side edges of the embedded portion 32. The notch 38 is hooked from below to the retaining projection 58 of the first housing 50, so that the terminal 30 is prevented from being pulled upward with respect to the first housing 50.

  As shown in FIG. 6, each bolt fastening portion 31 is provided with a bolt hole 36 through which a shaft portion of a bolt (not shown) is passed. Each bolt hole 36 is formed by penetrating each bolt fastening portion 31 in the plate thickness direction.

  The first housing 50 is made of synthetic resin and has a nut housing portion 51 for housing the nut 40 therein as shown in FIG. The nut housing portion 51 includes a bottom wall 52 that covers the substantially square nut 40 from below, and a peripheral wall 53 that covers the nut 40 from the side over the entire circumference. The peripheral wall 53 has a substantially square shape in plan view, is constituted by four side walls that are continuous without breaks, and has an entrance 54 through which the nut 40 enters the inside from above. As a result, the bottom wall 52 faces the nut accommodating portion 51 through the entrance 54.

  As shown in FIGS. 10 and 11, the bolt fastening portion 31 is disposed at the opening edge portion 55 of the entrance 54. That is, the bolt fastening portion 31 is in contact with the opening edge portion 55 of the entrance 54 from above, so that the terminal 30 is prevented from falling downward with respect to the first housing 50.

  The bottom wall 52 is provided with a relief recess 56 that allows the shaft portion of the bolt to escape. The bolt hole 36, the inner space of the nut receiving portion 51, and the inner space of the escape recess 56 are in communication with each other, and the bolt hole 36 and the escape recess 56 are arranged substantially coaxially. 10 and 11, the bolt fastening portion 31 is in contact with the opening edge 55 of the entrance 54, and therefore the clearance between the bolt fastening portion 31 and the opening edge 55 of the entrance 54 is zero. . The bolt hole 36 is smaller than the maximum outer diameter of the nut 40. Therefore, the nut 40 accommodated in the nut accommodating portion 51 is held in a retaining state by the bolt fastening portion 31. Further, since the nut 40 is prevented from coming off by the bolt fastening portion 31, it is not necessary to press-fit into the nut housing portion 51, and a tolerance at the time of bolt fastening is set by setting a clearance between the nut 40 and the peripheral wall 53. Can be absorbed.

  A pair of left and right positioning walls 59 are provided on the upper surface of the peripheral wall 53. The interval between the pair of positioning walls 59 is slightly wider than the width of the bolt fastening portion 31. Thereby, when the terminal 30 is assembled to the first housing 50, the bolt fastening portion 31 can be positioned at a predetermined position by inserting the bolt fastening portion 31 between the pair of positioning walls 59.

  As shown in FIG. 8, the mounted portion 37 connected to the bolt fastening portion 31 in the embedded portion 32 is mounted on a mounting portion 57 that is recessed on the outer surface of the peripheral wall 53 of the nut housing portion 51. A plurality of holding ribs 57 </ b> A are provided on a pair of left and right side walls constituting the mounting portion 57. When the mounted portion 37 is press-fitted into the mounting portion 57, the plurality of holding ribs 57 </ b> A are crushed by the mounted portion 37 so that the mounted portion 37 is held by the mounting portion 57.

  The present embodiment is configured as described above, and its operation will be described subsequently. First, the nut 40 is inserted from the entrance 54 of the nut housing part 51 of the first housing 50, and the nut 40 is housed inside the nut housing part 51. Next, the bolt fastening portion 31 of the terminal 30 is inserted between the pair of positioning walls 59 and disposed at the opening edge portion 55 of the entrance 54. At this time, the mounted portion 37 of the embedded portion 32 is mounted on the mounting portion 57 of the first housing 50 while crushing the plurality of holding ribs 57A. As a result, the terminal nut assembly 20 shown in FIG. 6 is configured. The terminal nut assembly 20 is assembled for all the terminals 30.

  Next, these terminal nut assemblies 20 are set in a mold as a core. When the mold is closed and molten resin is injected into the mold cavity, the embedded portion 32 and a part of the first housing 50 are embedded in the resin. As the resin cools and hardens, the second housing 60 is formed, and the plurality of terminal nut assemblies 20 are fixed together. Thereafter, the terminal block 10 in which the plurality of terminal nut assemblies 20 and the second housing 60 are integrated is obtained by opening the mold and releasing the mold.

  As described above, in the present embodiment, since the bolt fastening portion 31 of the conductive plate (terminal 30) is disposed at the opening edge portion 55 of the entrance 54 of the nut housing portion 51, the bottom wall 52 of the nut housing portion 51 is provided. Further, the nut 40 is covered from all directions by the peripheral wall 53 and the bolt fastening portion 31. Therefore, the nut 40 can be held inside the nut housing portion 51, and the nut 40 can be prevented from falling off.

The housing includes a first housing 50 having a nut housing portion 51, and the first housing 50 holds the conductive plate in a state where the bolt fastening portion 31 is disposed at the opening edge portion 55 of the entrance 54. It is good also as a structure which has the rib 57A.
According to such a configuration, the bolt fastening portion 31 can be held on the opening edge portion 55 of the entrance 54 by the holding rib 57A.

The housing may include a second housing 60 that is insert-molded with a plurality of first housings 50 as cores.
In this way, each conductive plate and each first housing 50 can be integrally fixed by the second housing 60.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) Although the terminal 30 is held in the first housing 50 by the plurality of holding ribs 57A in the above embodiment, the terminal 30 and the first housing 50 are directly held by the mold without providing the holding rib 57A. Molding may be performed.

  (2) Although the insert molding is performed using the plurality of first housings 50 as cores in the above embodiment, the insert molding may be performed using one first housing 50 as a core.

  (3) Although the clearance between the bolt fastening portion 31 and the opening edge 55 of the entrance 54 is zero in the above embodiment, a clearance may be provided as long as the nut 40 can be prevented from falling off. Good.

10 ... Terminal block 30 ... Terminal (conductive plate)
DESCRIPTION OF SYMBOLS 31 ... Bolt fastening part 36 ... Bolt hole 40 ... Nut 50 ... 1st housing 51 ... Nut accommodating part 52 ... Bottom wall 53 ... Perimeter wall 54 ... Entrance 55 ... Opening edge 57A ... Holding rib 60 ... 2nd housing

Claims (1)

With nuts,
A conductive plate;
A terminal block having a nut housing portion in which the nut is housed, and a housing in which the conductive plate is held;
The nut housing portion is configured to include an entrance through which the nut enters the inside from above, and a peripheral wall that covers the nut from the side over the entire circumference, and a bottom wall that covers the nut from below, The bottom wall faces above the nut accommodating portion through the entrance,
The conductive plate has a bolt fastening portion in which a bolt hole is formed, and the bolt fastening portion is disposed at an opening edge portion of the entrance .
The housing includes a first housing having the nut housing portion, and the first housing holds the conductive plate in a state where the bolt fastening portion is disposed at an opening edge of the entrance. Have ribs,
The said housing is a terminal block provided with the 2nd housing insert-molded by using the said some 1st housing as a core .

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