JP3271497B2 - Terminal structure of electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal structure of electric equipment such as an earth leakage circuit breaker and a wiring circuit breaker,
The present invention relates to a terminal structure to which a terminal cover can be attached with one hand.

[0002]

2. Description of the Related Art FIG. 13 is a perspective view of a main part showing a terminal structure of a conventional electric device. A lid 2 covers a case 1 that houses the main body of the electric device. The front side of the lid 2 has a stepped shape, and a terminal portion 11 is formed. This terminal part 1
Numeral 1 is also provided on the depth side (not shown) of the lid 2, and two terminal portions 11 on the input side and the output side are formed. A handle 12 projecting upward from the lid 2 is for manually opening and closing a circuit in the electric device main body. In addition, a hole 4 is provided in the notch portion 5 on the near side of the terminal portion 11, and a screw 14 (FIG. 14) described later is passed through the hole 4 so that
The lid 2 is screwed to the case 1. Further, the case 1 is also provided with two notches 3, and wiring from a terminal screw (not shown) is drawn from the inside to the outside through the notches 3. The terminal portion 11 is covered by the terminal cover 6.

FIG. 14 is a plan view of a main portion showing a configuration in a state where the terminal cover 6 of FIG. 13 is removed. The cover 2 is fixed to the case by a screw 14 screwed into the hole 4 of the cutout 5. The terminal portion 11 has a T-shaped recess 1
3 is formed, and a screw hole 15 penetrates into the recessed portion 13. A terminal screw 16 is fitted into the screw hole 15, and a wiring (not shown) from outside is pressed by a lower end surface of the terminal screw 16 to fix the wiring. In addition,
The upper screw hole 17 is for screwing the terminal cover 6 with the mounting screw 9 (FIG. 13).

FIG. 15 is a plan view showing only the terminal cover 6 shown in FIG. Plate of the terminal cover 6 screwdriver through hole 7 Re two provided et Rutotomoni, mounting screws 9 (FIG. 13) is another bore 8 is provided to be screwed. The shape of the terminal cover 6 is designed to fit into the recess 13 in FIG. Returning to FIG. 13, the terminal cover 6 is fitted into the recess 13. The mounting screw 9 is fitted into the screw hole 17 of FIG. The mounting screw 9 is rotated by the driver 10, and the terminal cover 6 is screwed to the terminal portion 11. The driver through hole 7 is for retightening the terminal screw, so that it is not necessary to remove the terminal cover 6 at a later time when maintenance is performed. The attachment of the terminal cover 6 to the terminal portion 11 prevents an electric shock accident due to contact with a finger and a short circuit accident due to the attachment of foreign matter.

FIG. 16 is a perspective view showing a terminal structure of a different conventional electric device. A lid 32 covers a case 31 that houses the electric device body. The front side of the lid 32 has a stepped shape, and a terminal portion 110 is formed. The terminal portion 110 is also provided on the depth side (not shown) of the lid 32, and two terminal portions 110 on the input side and the output side are formed. Handle 12 projecting upward from lid 32
Is for manually opening and closing the circuit in the electric device main body. A hole 39 is provided on the front side of the terminal portion 110, and the cover 32 is screwed to the case 31 by passing a screw (not shown) through the hole 39. further,
Two terminal screws 16 are arranged on the case 31, and wiring (not shown) is drawn out. The terminal portion 110 is covered by the terminal cover 64 held by the mounting screw 30. The terminal cover 64 is provided with the same driver through-hole 7 as that described in FIG. 13, so that the terminal screws 16 can be further tightened without removing the terminal cover 64.

FIG. 17 is a perspective view of a main part showing a configuration in a state where the terminal cover 64 of FIG. 16 is removed. An interphase wall 38 is provided between the terminal screws 16, and a terminal cover is mounted on the end 38A. The screw holes 35 are for receiving the mounting screws 30 (FIG. 16) for holding the terminal cover. FIG. 18 is a perspective view showing only the terminal cover 64 of FIG. The terminal cover 64 is formed in an L shape by the first plate portion 64A and the second plate portion 64B. The first plate portion 64A is provided with another cutout portion 34 through which the driver through hole 7 penetrates and into which the mounting screw 30 (FIG. 16) is screwed. Second plate 6
4B, a holding portion 35 for holding the interphase wall 38 (FIG. 16) is cut out in a frame shape.

Returning to FIG. 16, the terminal cover 64 is attached to the interphase wall 3.
8, the holding portion 35 is sandwiched between the interphase walls 38, and the mounting screws 30 are attached to hold the terminal cover 64 in this state. A hole 50 is formed in a lower portion of the terminal cover 64, and a wiring for drawing out to the outside penetrates.

[0008]

However, the conventional device as described above has a problem that the terminal cover must be attached to the terminal portion with both hands. That is, when the operator attaches the terminal cover to the terminal portion, the operator must simultaneously hold the driver, the mounting screws, and the terminal cover. The work was performed by holding the screwdriver with one hand, grasping the mounting screw with the other hand, and pressing the terminal cover with the lower part of the hand. This work is performed at two places on the input side and the output side of the terminal section by one electric device, but it is impossible to work on these two places at the same time because both hands are required. For this reason, it took time to attach the terminal cover.

In addition, each of the electric devices requires two terminal covers and two mounting screws. An object of the present invention is to enable the terminal cover to be attached with one hand and to reduce the number of terminal components.

[0010]

According to the present invention, a plurality of terminal screws of an electric device are arranged.
Terminal part and a terminal cover that covers the terminal screw.
Between the terminal screws
The terminal cover is provided between the first plate portion and the second plate portion.
L-shaped, and a notch-like holding portion is formed on the second plate portion.
Is provided, and the first plate portion is arranged in contact with the end of the interphase wall,
The terminal cover is sandwiched between the two
In the terminal structure of electrical equipment in which the bar is held,
A cutout portion for fitting the first plate portion is formed at the end of the intermediate wall.
At the same time, on the side wall of the
A fitting part consisting of a convex part and a concave part that can be fitted to each other is formed.
And the terminal cover is fitted into both the notch and the fitting part.
To be retained by Thereby, the operator can attach the terminal cover to the terminal portion with one hand. Moreover, the number of terminal parts is only two on the terminal cover in each electric device.

[0011]

[0012]

[0013]

In this configuration, the fitting portion on the terminal cover side forms a convex portion, and a guide groove larger than the convex portion is formed on the side surface of the interphase wall from the end of the interphase wall to the base of the interphase wall. It may be formed. When the terminal cover is attached to the terminal portion, the terminal cover is made oblique or curved, the convex portion, which is the fitting portion, is inserted into the guide groove, and the convex portion is advanced along the guide groove. The fitting portion is fitted into the concave portion. Thus, the holding portion of the terminal cover can be easily sandwiched between the interphase walls.

Further, in such a configuration, the inner wall of the guide groove on the fitting portion side may be formed with a slope or a curved surface. Thereby, when the convex portion of the terminal cover is moved out of the guide groove and transferred to the concave portion of the fitting portion on the interphase wall side, the convex portion of the terminal cover smoothly moves from the guide groove because the inner wall surface of the guide groove is curved. You will escape. In such a configuration, the guide groove side of the fitting portion may be formed with a slope or a curved surface. Accordingly, when the terminal cover is pressed toward the terminal screw when the terminal cover is removed from the terminal portion, the fitting portion between the terminal cover holding portion and the terminal portion inter-wall can be smoothly removed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. FIG. 1 is a perspective view of an essential part showing a terminal structure of an electric device according to an embodiment of the present invention, for example, a terminal structure of a circuit breaker. FIG. 2 is an essential part of a lid 2 from which a terminal cover shown in FIG. 1 is removed. FIG. 3 is a plan view, and FIG. 3 is a sectional view taken along line AA in FIG. In each of the figures, a pair of engaging projections 19 are provided on the edge of the recessed portion 13 of the lid 2, and the terminal cover 60 is fitted into the recessed portion 13 below the engaging projection 19 as shown in FIG. 1.

FIG. 4 is a plan view showing only the terminal cover 60 shown in FIG. The terminal cover 60 is a flat plate having a width T on the left and right sides, and has a U-shaped cutout portion 18 at the front and rear (up and down in FIG. 4). That is, the terminal cover 60
Are formed so that the left, right, front and rear, and top and bottom are completely symmetric. In FIG. 4, the engagement projections 19 of FIG. 1 are arranged at the dotted frame shown on the left and right of the terminal cover 60. Assuming that the facing gap between the engaging projections 19 is D, D is set to be slightly smaller than T. In FIG. 1, when the terminal cover 60 is placed on the recess 13 of the terminal portion 11 and the terminal cover 60 is pressed with a finger, the terminal cover 60 passes through the gap between the engaging projections 19 and is fitted into the recess 13. . In addition, the screw hole 17 comes to the area of the round dotted line in the upper notch 18 in FIG. 4, and the hole 4 comes to the area of the round dotted line in the lower notch 18. It has become.

The rest of FIGS. 1 to 4 is the same as the conventional configuration shown in FIGS. The same portions are denoted by the same reference numerals, and detailed description will not be repeated. In the configuration of FIG. 1, the terminal cover 60 can be attached only by pressing the terminal cover 60 with one hand, and no mounting screws are required. Therefore, tools such as a screwdriver are not required. Since the terminal cover 60 is symmetrical left and right, front and rear, and up and down, there is no need to worry about the direction when attaching the terminal cover 60 at all. Also, there is no need to turn the terminal cover 60 over. Therefore,
The work is much easier than with conventional configurations. Furthermore, the terminal components do not require mounting screws, and each electric device has only two terminal covers 60. In addition, the engagement protrusion 1
9 does not increase the number of parts if the lid 2 is formed beforehand when the lid 2 is molded.

In the above embodiment, the notch 1 shown in FIG.
8 was formed two to make it symmetrical back and forth,
A mounting screw can be fitted into the screw hole 17 and the terminal cover 60 can be screwed like a conventional device. FIG.
, The upper surface 19A of the engagement projection 19 is curved, but the upper surface 19 may be curved without being bent.
0 can pass through the opposing gap of the engagement projection 19. However, by forming the upper surface 19A of the engagement protrusion 19 as a curved surface or an inclined surface, the terminal cover 60 smoothly passes through the facing gap, and the engagement protrusion 19 is not damaged.

FIG. 5 is a perspective view of a main part showing a terminal structure of an electric device according to a different embodiment of the present invention, FIG. 6 is a sectional view taken along the line BB of FIG. 5, and FIG. Terminal cover 6
It is the top view which took out and showed only 2. In FIG. 6, a concave portion 63B is formed on the inner wall of the concave portion 13 of the lid 2. On the other hand, convex portions 63A as shown in FIG. The convex portion 63A and the concave portion 63
B can be fitted to each other and form an engaging portion.
Other configurations are the same as those in FIGS. 1 to 4.

In FIG. 5, the terminal cover 62 is
When the terminal cover 62 is pressed on the terminal cover 62 with a finger, the protrusion 63A of the terminal cover 62 of FIG. 7 fits into the recess 63B of FIG. In the configuration shown in FIG. 1, the terminal cover 62 can be attached only by pressing the terminal cover 62 with one hand, and no mounting screws are required. Therefore,
No tools such as a screwdriver are required. In addition, the terminal cover 62 has good workability such as not having to worry about the direction at the time of attachment, not having to turn the terminal cover 62 over, and reducing the number of terminal parts.
Both are the same as the embodiment of FIG.

FIG. 8 is a perspective view of a main part showing a terminal structure of an electric device according to still another embodiment of the present invention.
Is provided. At the upper end of the concave portion 13 of the terminal portion 11 of the lid 2, the engagement protrusions 21 are provided so as to protrude in directions facing each other. 9A and 9B are diagrams showing only the terminal cover 61 of FIG. 8 taken out, wherein FIG. 9A is a plan view and FIG.
It is XX sectional drawing of FIG. 9 (A). In FIG. 9A, the engagement protrusions 21 come to the right and left dotted frame of the terminal cover 61, and the left and right width T of the terminal cover 61 is slightly smaller than the gap D formed by the two engagement protrusions 21. It is getting wider. A cylindrical projection 23 is formed around the driver-through hole 7. In FIG. 9B, the protruding portion 23 protrudes from the surface of the terminal cover 61 by the same length d in the vertical direction. 8 and 9 correspond to FIGS. 1 and 4 respectively.
Is the same as

In FIG. 9, since the protrusion 23 protrudes from the terminal screw 16 (FIG. 14) serving as an internal charging part, the safety is increased. Although touching the terminal cover 61 without the protruding portion 23 does not lead to an electric shock accident, the safety is increased by configuring the terminal cover 61 as far as possible from the charged portion. FIG.
In (B), if the outer diameter Φ of the protrusion 23 is smaller than the diameter of the screw hole 15 (FIG. 3), when the terminal cover 61 is fitted into the recess 13 of FIG. The terminal cover 61 and the bottom surface of the concave portion 13 are fitted into the holes 15 so that the terminal cover 61 fits well. Further, the terminal cover 6 shown in FIG.
4 is symmetrical in the left and right, front and rear, and up and down as in FIG. Therefore, the worker does not have to check the direction of the terminal cover 61 each time.

The shape of the protruding portion 23 in FIG. 6 does not necessarily have to be cylindrical. The shape of the protrusion 23 may be arbitrary as long as the protrusion length d is secured around the driver through hole 7. FIG. 10 is a perspective view showing a terminal structure of an electric device according to still another embodiment of the present invention, FIG. 11 is a perspective view of a main part showing a configuration in which a terminal cover in FIG. 10 is removed, and FIG. It is the perspective view which took out and showed only the terminal cover of FIG. In FIG. 11, a notch 40 is formed at an end of the interphase wall 38 of the terminal portion 110, and two concave portions 36 are formed on the side surface of the interphase wall 38 (one is not visible, but is located on the other side of the interphase wall 38). ) Is formed. Further, two guide grooves 41 are formed on the side surface of the interphase wall 38. On the other hand, in FIG. 12, the terminal cover 65 is formed with two convex portions 37 on the inner wall surface of the holding portion 35 (one is not visible, but is located on the near side of the inner wall surface of the holding portion 35). 11 and 12,
The center portion of the first plate portion 65A of the terminal cover 65 is an interphase wall 38.
The protrusion 37 of the terminal cover 65 and the recess 36 of the interphase wall 38 form a fitting portion, and are formed so as to fit into each other. Further, the guide groove 41 of the interphase wall 38 is formed larger than the projection 37.

When attaching the terminal cover 65 to the terminal portion 110, the terminal cover 6 shown in FIGS.
The projection 37 is inserted into the guide groove 41 by tilting 5. The protrusion 37 of the terminal cover 65 is advanced along the guide groove 41, and the terminal cover 65 is lowered until the first plate portion 65 </ b> A enters the cutout portion 40. Therefore, the terminal cover 65 is rotated in the direction D about the axis C in FIG. By this rotation, the first plate portion 65A of the cover 65 fits into the notch portion 40, and the convex portion 37 and the concave portion 36, which are fitting portions, fit together, and the cover 65 is held by the terminal portion 110.

In the configuration shown in FIG. 10, the terminal cover 65 can be fitted with one hand for mounting the terminal cover 65, and mounting screws are not required. Therefore, both the good workability and the reduction in the number of terminal parts are exactly the same as the advantages in the embodiment of FIGS. 1 and 5. The guide groove 41 in FIG. 11 is not necessarily required. The terminal cover 65 fits into the terminal portion 110 due to the deformation of the terminal cover 65 itself. However, by providing the guide groove 41, the terminal cover 65 can be attached with a very weak force. In addition, by forming the inner wall of the guide groove 41 with a curved surface as shown in FIG. 11, when the protrusion 37 of the terminal cover 65 comes out of the guide groove 41 and is transferred to the recess 36 on the side of the interphase wall 38, the guide is provided. Since the inner wall surface of the groove 41 is curved, the convex portion 37 of the terminal cover 65 comes out of the guide groove 41 smoothly. The inner wall of the guide groove 41 may be a simple slope instead of a curved surface.

11 and 12, a surface 36A of the recess 36 on the side of the interphase wall 38 on the guide groove 41 side is formed as a slope. On the other hand, the surface 37A of the convex portion 37 of the terminal cover 65 on the guide groove 41 side is also formed as a slope. Thereby, when the second plate portion 65B of the terminal cover 65 is pressed toward the terminal screw 16 when the terminal cover 65 is detached from the terminal portion 110, the convex portion 37 and the concave portion 36 come off smoothly. The surface 37A of the convex portion 37 and the surface 3A of the concave portion 36
6A may be a curved surface instead of a slope. Further, as the fitting portion, a convex portion may be formed on the inter-phase wall 38 side, and a concave portion may be formed on the terminal cover 65 side.

[0028]

As described above, according to the present invention, the end of the interphase wall is provided.
The notch part where the first plate part fits is formed,
The side surface of the inter-wall and the inner wall surface of the holding portion of the second plate
A fitting part consisting of a convex part and a concave part
You. Thereby, the operator can attach the terminal cover to the terminal portion with one hand. Therefore, if both hands are used, two terminal covers on the load side and the power supply side of the electric device can be attached at the same time, and work efficiency is greatly improved. Furthermore, the number of terminal parts is only two in each electric device, that is, the terminal cover on the load side and the power supply side, and the cost is greatly reduced. Also, no tools such as a screwdriver are required.

[0029]

[0030]

[0031]

In this configuration, the fitting portion on the terminal cover side forms a convex portion, and a guide groove larger than the convex portion is formed on the side surface of the interphase wall from the end of the interphase wall to the base of the interphase wall. It is formed. Thereby, the holding portion of the terminal cover can be easily sandwiched between the interphase walls, and the attachment of the terminal cover becomes very easy. In such a configuration, the inner wall of the guide groove on the fitting portion side is formed with a slope or a curved surface. As a result, the protrusion of the terminal cover comes out of the guide groove smoothly when the terminal cover is attached,
The fitting part is not damaged.

Further, in such a configuration, the guide groove side of the fitting portion is formed with a slope or a curved surface. Thereby,
By pressing the second plate portion of the terminal cover toward the terminal screw when removing the terminal cover from the terminal portion, the terminal cover comes off smoothly and the fitting portion is not damaged.

[Brief description of the drawings]

FIG. 1 is an essential perspective view showing a terminal structure of an electric device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a terminal portion configuration of only a lid in FIG. 1;

FIG. 3 is a sectional view taken along the line AA in FIG. 2;

FIG. 4 is a plan view showing only the terminal cover shown in FIG. 1;

FIG. 5 is an essential part perspective view showing a terminal structure of an electric device according to a different embodiment of the present invention.

FIG. 6 is a sectional view taken along line BB of only the lid of FIG. 5;

FIG. 7 is a plan view showing only the terminal cover shown in FIG. 5;

FIG. 8 is an essential part perspective view showing a terminal structure of an electric device according to still another embodiment of the present invention.

9A and 9B are diagrams showing only the terminal cover of FIG. 8 taken out, wherein FIG. 9A is a plan view and FIG. 9B is a view taken along line XX of FIG. 9A.
Sectional view

FIG. 10 is a perspective view showing a terminal structure of an electric device according to still another embodiment of the present invention.

11 is a perspective view of a main part showing a configuration in a state where a terminal cover of FIG. 10 is removed.

12 is a perspective view showing only the terminal cover of FIG. 10 taken out.

FIG. 13 is an essential part perspective view showing a terminal structure of a conventional electric device.

14 is a plan view of a main part showing a configuration in a state where a terminal cover of FIG. 13 is removed.

FIG. 15 is a plan view showing only the terminal cover 6 shown in FIG. 13;

FIG. 16 is a perspective view showing a terminal structure of a conventional different electric device.

17 is a perspective view of a main part showing a configuration in a state where the terminal cover of FIG. 16 is removed.

FIG. 18 is a perspective view showing only the terminal cover of FIG. 16 taken out therefrom;

[Explanation of symbols]

11, 110: terminal portion, 6, 60, 61, 62, 64,
65: terminal cover, 65A: first plate portion, 65B: second plate portion, 7: driver through hole, 19, 21: engagement protrusion, 2
3: Projection, 13: Depression, 63A, 37: Convex, 63
B, 36: recess, 38: interphase wall, 16: terminal screw, 3
5: clamping portion, 40A: protrusion, 41: guide groove, 40: notch

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 9/00 H01H 73/20

Claims (4)

(57) [Claims] An electric device comprising: a terminal portion in which a plurality of terminal screws are arranged; and a terminal cover for covering the terminal screw, wherein an interphase wall protruding from the terminal portion is provided between the terminal screws. A cover is formed in an L shape by the first plate portion and the second plate portion, and a notch-shaped holding portion is provided in the second plate portion, and the first plate portion is disposed in contact with an end of the inter-wall. In a terminal structure of an electric device in which a terminal cover is held by sandwiching a holding portion of a second plate portion between phase walls, a cutout portion in which the first plate portion fits is formed at the end of the phase wall. At the same time, a fitting portion composed of a convex portion and a concave portion that can be fitted to each other is formed on the side surface of the interphase wall and the inner wall surface of the holding portion, and the terminal cover is fitted into both the notch portion and the fitting portion. A terminal structure of an electric device, characterized by being held by a terminal. 2. The device according to claim 1 , wherein the fitting portion on the terminal cover side forms a convex portion, and a guide groove larger than the convex portion extends from an end of the interphase wall to a base of the interphase wall. A terminal structure of an electric device, wherein the terminal structure is formed on a side surface of an interphase wall. 3. The terminal structure of an electric device according to claim 2 , wherein the inner wall of the guide groove on the fitting portion side is formed with a slope or a curved surface. 4. A pump of Claim 2 or 3,
A terminal structure of an electric device, wherein a guide groove side of a fitting portion is formed with a slope or a curved surface.