JP2017199528A - Terminal board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal board capable of suppressing manufacturing cost of a terminal part cover.SOLUTION: A terminal board 1 having a terminal part 2 including terminals 6, 6, and a pair of sidewalls 3, 4 projecting from the left and right sides of the terminal part 2 to the surface side of the terminals 6, 6, where a terminal part cover 5 is bridged between the projection ends of the pair of sidewalls 3, 4 so as to face the terminal part 2, is further provided with protrusions 20 protruding from each of the pair of sidewalls 3, 4 toward the opposing sidewalls 3, 4, and placed oppositely to the outer surface of the terminal part cover 5, a pair of base parts 21, 22 formed on the opposite sides of the protrusion 20 with a space respectively, and placed oppositely to the internal surface of the terminal part cover 5, and end face supports 23 provided on the sidewalls 3, 4 so as to be placed oppositely to the end side face of the terminal part cover 5.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a terminal block.

  As a conventional terminal block, there is a terminal block provided in a circuit breaker. The terminal block includes a terminal portion and a pair of side walls standing on both the left and right sides of the terminal portion. A terminal part cover is disposed between the pair of side walls so as to be bridged over the terminal part (see, for example, Patent Document 1).

  A first convex portion, a second convex portion, and an inverted U-shaped groove are formed inside the pair of side walls. A 1st convex part is a part which supports a terminal part cover. The second convex portion is formed above the first convex portion so that the terminal portion cover does not come off upward. The inverted U-shaped groove is a portion where the protrusions formed on the left and right ends of the terminal cover are locked, and prevents the terminal cover from falling off from the front surface.

JP 2001-266730 A

  However, in the case of such a terminal block, the terminal cover must be provided with a protrusion that fits into the inverted U-shaped groove, and the dimensional management of the protrusion of the terminal cover is difficult. There was a problem of cost.

  This invention is made | formed in view of the above, Comprising: It aims at providing the terminal block which can hold down the manufacturing cost of a terminal part cover.

  In order to solve the above-described problems and achieve the object, a terminal block according to the present invention includes a terminal portion provided with a terminal, and a pair of side walls protruding from the left and right sides of the terminal portion toward the surface side of the terminal. And a terminal block in which a terminal cover is spanned between the protruding end portions of the pair of side walls so as to face the terminal portion, and protrudes from each of the pair of side walls toward the facing side wall. The convex portion disposed opposite to the outer surface of the terminal portion cover and the portions on both sides of the convex portion are formed with a gap between each other and disposed opposite the inner surface of the terminal portion cover. A pair of base portions and an end surface support portion provided on the side wall so as to be opposed to the side surface of the end portion of the terminal portion cover.

  Further, in the terminal block according to the present invention, the terminal is formed with a screw hole penetrating the terminal on the front and back sides, and the base portion has a gap between each other perpendicular to the side wall and a central axis of the screw hole. It is good to be formed in the said side wall so that it may become a position which avoided the surface containing.

  Moreover, the terminal block which concerns on this invention WHEREIN: The said clearance gap ensured between the said pair of base parts is good to have a part which spreads gradually toward the said terminal part.

  Moreover, the terminal block which concerns on this invention WHEREIN: It is good for the said terminal part cover to be engage | inserted between the said base part and the said convex part.

  According to these structures, even if it is a rectangular terminal part cover which does not have a protrusion, for example, it can support suitably by a pair of base part and convex part. Therefore, the manufacturing cost of the terminal portion cover can be reduced.

FIG. 1 is a plan view showing an external BOX including a terminal block according to an embodiment of the present invention. FIG. 2 is a plan view showing a state in which the terminal cover is attached to the external BOX shown in FIG. FIG. 3 is a perspective view showing the external BOX shown in FIG. FIG. 4 is a perspective view showing a state in which the terminal cover is attached to the external BOX shown in FIG. FIG. 5 is an enlarged perspective view of a main part of the terminal block shown in FIG. 6 is a plan view of the terminal block shown in FIG. 7 is a cross-sectional view taken along line AA of the terminal block shown in FIG. 8 is a cross-sectional view showing a main part of a cross section of the terminal block shown in FIG. FIG. 9 is an enlarged perspective view of a main part of a terminal block according to a modification of the present invention.

  Hereinafter, preferred embodiments of a terminal block according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view showing an outline of an external BOX 101 having a terminal block 1 according to an embodiment of the present invention. This external BOX 101 is used together with the circuit breaker 102. The external BOX 101 is formed in a two-step shape on the back side and the near side. An operation switch 103 is provided on the upper stage of the external BOX 101. Terminal blocks 1 are respectively provided on the front side and the lower side of the external BOX 101. Since these two terminal blocks 1 have the same configuration, the front terminal block 1 will be described in the present embodiment. Further, in the following, for convenience, the direction is specified with the upper side of the external BOX 101 as the upper side and the lower side as the lower side.

  The terminal block 1 has a terminal portion 2 and a pair of side walls 3 and 4, and faces the terminal portion 2 between the protruding end portions of the pair of side walls 3 and 4 as shown in FIGS. 2 and 4. The terminal part cover 5 is bridged over. The terminal cover 5 applied in the present embodiment has a rectangular thin plate shape. As shown in FIGS. 1 and 6, the terminal portion 2 is divided into two by a central partition 10 provided between the side walls 3, 4. 6 is provided. The terminals 6 and 6 are formed with screw holes 7 penetrating the front and back sides. These terminals 6 and 6 are arranged such that the electric wire is fastened by screws 9 via the square washers 8.

  As shown in FIGS. 3 and 5, the pair of side walls 3 and 4 protrudes upward (from the surface side of the terminal) from the left and right sides of the terminal portion 2. A back side wall 11 is provided between the back end portions of the pair of side walls 3 and 4. The rear side wall 11 serves as a boundary with the upper stage portion of the external BOX 101 and is formed higher than the pair of side walls 3 and 4. The pair of side walls 3 and 4 are provided with a convex part 20, a first base part 21 and a second base part 22, and an end face support part 23, respectively.

  The convex portion 20 is disposed opposite to the upper surface (outer surface) of both end portions of the terminal portion cover 5, and is formed on the upper end portions of the pair of side walls 3, 4, and the side walls facing each side wall 3, 4. It protrudes toward 3 and 4. The upper end surface 51 of the convex portion 20 is formed obliquely so as to gradually lower toward the protruding end. As is apparent from the drawing, the convex portion 20 is formed at a position that is shifted to the back side wall 11 with respect to a plane that includes the central axis of the screw hole 7 and is orthogonal to the side walls 3 and 4.

  The first base part 21 and the second base part 22 are formed so as to ensure a gap 52 between the front side and the back side of the convex part 20. The first base portion 21 and the second base portion 22 are formed on the side walls 3 and 4 so that the gap 52 therebetween is located at a position that is perpendicular to the side walls 3 and 4 and avoids the surface including the central axis of the screw hole 7. ing. The support surfaces 30 and 31 that are the upper ends of the first base portion 21 and the second base portion 22 are portions on which the lower surfaces (inner surfaces) of both end portions of the terminal portion cover 5 are placed, and are on the same plane. It is located so as to be on the same plane as the upper end surface 32 of the central partition 10.

  The first platform 21 provided on the front side of the side walls 3 and 4 is formed so that the width along the depth is substantially constant. On the other hand, the second base part 22 provided on the back side of the side walls 3 and 4 has a surface 53 facing the first base part 21 that is gradually inclined to the back, and is in the middle of the side walls 3 and 4. Only formed. That is, the gap 52 between the first base portion 21 and the second base portion 22 gradually widens downward, and then becomes a gap 52 between the first base portion 21 and the back side wall 11 and has a certain size. Yes.

  The end surface support portion 23 is disposed to face both side surfaces of the terminal portion cover 5, and protrudes upward from a portion located on the front side of the support surface 30 of the first base portion 21.

  When the terminal cover 5 is attached to the terminal block 1 configured in this way, the end of the terminal cover 5 is located between the first base portion 21 and the second base portion 22 of the one side wall 3 and the convex portion 20. If the terminal part cover 5 is bent after that, the terminal part cover 5 is bent, and the terminal part cover 5 is inserted between the first base part 21 and the second base part 22 and the convex part 20 of the other side wall 4, The terminal cover 5 can be disposed so as to be bridged between the upper ends of the side walls 3 and 4. That is, the terminal part cover 5 placed on the first base part 21 and the second base part 22 via the lower surface is arranged so that the convex part 20 is opposed to the upper surface, and the end surface support part on the front side surface. 23 is arranged opposite to each other, and the back side wall 11 is opposed to the side surface on the back side, and is supported without falling off between the side walls 3 and 4, and covers the upper region of the terminal portion 2. It becomes possible. As described above, the terminal portion cover 5 that covers the terminal portion 2 of the external BOX 101 is simply a rectangular flat plate, and has no protrusions on both side end surfaces. Therefore, the manufacturing cost of the terminal part cover 5 can be reduced. In addition, in this terminal block 1, since the four corners of the terminal portion cover 5 are supported by the first base portion 21 and the second base portion 22, as shown in FIG. There is no fear that the cover 5 is largely inclined, and the cover 5 can be prevented from falling off the side walls 3 and 4.

  In the terminal block 1, the first base portion 21 and the second base portion 22 are provided on both sides of the convex portion 20 so as to secure a gap 52 from each other. The gap 52 is provided so as to continue to the lower ends of the side walls 3 and 4, and does not have a portion whose size decreases downward. Therefore, when the terminal block 1 is resin-molded by a mold, it is not necessary to perform a so-called undercut process, and the terminal block 1 can be manufactured at a low cost. In particular, in the case of the present embodiment, the gap 52 between the first base portion 21 and the second base portion 22 has a portion that gradually widens downward. The width can be increased at the lower portion, and the strength of the mold can be ensured.

  Furthermore, since the convex portion 20 includes the central axis of the screw hole 7 and is formed at a position offset to the back side wall 11 with respect to the plane orthogonal to the side walls 3, 4, in other words, the first base portion 21. And the gap 52 of the second base part 22 is arranged so as to be shifted to the back side, that is, the gap 52 is arranged at a position that is perpendicular to the side wall and avoids the surface including the central axis of the screw hole. When the electric wire is attached to the terminals 6 and 6 using the square washer 8, the corner of the square washer 8 can be prevented from fitting into the gap 52 between the first base part 21 and the second base part 22. When the screw 9 is tightened in a state where the corner of the square washer 8 is fitted in the gap 52 between the first base part 21 and the second base part 22, the screw 9 or a nut fitted to the screw 9 may be damaged. Although there is a possibility that the contact pressure of the electric wires with respect to the terminals 6 and 6 is insufficient, the terminal block according to the present embodiment does not cause these problems.

  In the present embodiment, the upper surfaces of the pair of base portions 21 and 22 are formed on substantially the same plane as the upper end surface of the central partition wall 10, but the central partition wall 10 may be formed lower. Good. In the present embodiment, the convex portion 20 is formed to be shifted to the back side on the side wall, but may be formed to be shifted to the near side.

  Furthermore, as shown in the modified example of FIG. 9, the terminal block 40 may be provided with the platform portions 43 and 44 such that the gap 54 is disposed in the middle of the side walls 41 and 42. Also in this modified example, the upper surface of the terminal portion cover 5 can be supported by the convex portion 45, and the lower surface of the terminal portion cover 5 can be supported by the pair of base portions 43 and 44. Therefore, the rectangular terminal part cover 5 which does not provide a protrusion can be used, and the manufacturing cost of the terminal part cover 5 can be reduced. Further, the gap 54 between the pair of base portions 43 and 44 is continuous to the lower ends of the side walls 41 and 42 and does not have a portion whose size decreases downward. Therefore, when the terminal block 40 is resin-molded with a mold, it is not necessary to perform a so-called undercut process, and the terminal block 40 can be manufactured at a low cost.

DESCRIPTION OF SYMBOLS 1 Terminal block 2 Terminal part 3, 4 Side wall 5 Terminal part cover 6 Terminal 7 Screw hole 8 Square washer 9 Screw 10 Central partition 11 Back side wall 20 Convex part 21 First base part 22 Second base part 23 End surface support parts 30 and 31 Support surface 32 Upper end surface 40 Terminal block 41, 42 Side wall 43, 44 Base portion 45 Protruding portion 51 Upper end surface 52 Clearance 53 Surface 54 Clearance 101 External BOX
102 Circuit breaker 103 Operation switch

Claims (4)

A terminal portion provided with a terminal, and a pair of side walls projecting from the left and right sides of the terminal portion to the surface side of the terminal, and facing the terminal portion between the projecting end portions of the pair of side walls. A terminal block over which the terminal cover is bridged,
Projecting toward the opposing side wall from each of the pair of side walls, and a convex portion disposed facing the outer surface of the terminal portion cover;
A pair of base parts formed on the both sides of the convex part while ensuring a gap between each other, and arranged to face the inner surface of the terminal part cover,
An end surface support portion provided on the side wall so as to be disposed opposite to an end side surface of the terminal cover;
A terminal block characterized by comprising:   The terminal is formed with a screw hole penetrating the terminal on the front and back sides, and the base portion is located at a position where the gap is away from a plane perpendicular to the side wall and including the central axis of the screw hole. The terminal block according to claim 1, wherein the terminal block is formed on the side wall.   The terminal block according to claim 1, wherein the gap secured between the pair of base portions has a portion that gradually widens toward the terminal portion.   The terminal block according to claim 1, wherein the terminal portion cover is fitted between the base portion and the convex portion.

Images