JPH0129705Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a terminal protection cover of an electrical device having exposed terminals.

[Conventional technology]

Conventionally, for example, in electromagnetic contactors, etc., the terminal for connecting the conductor wire is exposed to the outside, so a cover is installed to hide this terminal part to protect the terminal and prevent accidents such as electric shock. .

[The problem that the idea aims to solve]

This cover is fixed to the main body of the electrical equipment with screws, but the screws must not be removed when installing or removing it, and the screw holes in the cover must be aligned with the main body of the electrical equipment during installation. However, in the case of on-site construction, the work was complicated.
Furthermore, since screw holes must be drilled into the main body of the electrical equipment, the number of man-hours increases, and the number of parts also increases, resulting in a higher production price.

The present invention aims to solve the above-mentioned problems, and aims to provide a terminal protection cover mounting structure that can be connected to an electrical equipment main body without requiring any separate fixing means.

[Means to solve the problem]

In order to achieve this purpose, the terminal protection cover mounting structure for electrical equipment of the present invention has a flexible plate-like terminal protection cover made of synthetic resin on both sides of the terminal forming part of the electrical equipment having exposed terminals on both sides. A locking portion for receiving the upper surface is formed respectively, a mounting surface for receiving the lower surface of the terminal protection cover is formed at an intermediate portion of the locking portions on both sides, and a positioning engagement of the terminal protection cover is formed on the mounting surface. and the height of the mounting surface is set higher than the height of the wall surface with which the top surface of the terminal protection cover contacts in the locking part minus the thickness of the terminal protection cover. Features.

〔Example〕

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

In this example, an electromagnetic contactor is used as an electrical device, and the terminal protection cover mounting structure according to the present invention is applied to the exposed terminal portion of the electromagnetic contactor. Fig. 1 is a plan view of the electromagnetic contactor, and Fig. 2 is the same. Fig. 1 is a sectional view taken along the line I-I in Fig. 1, showing the upper side of the main body; Fig. 3 is a plan view of the terminal protection cover; Fig. 4 is a side view with the cover attached; Fig. 5. FIG. 2 is a perspective view showing a barrier portion of the electromagnetic contactor.

At the upper part of the casing 2 of the electromagnetic contactor 1, there are first, second, third, and fourth barriers 3, which form terminal forming parts.
4, 5, and 6 are provided in pairs on the left and right, and terminal plates 7, 8, and 9 are fixed between these barriers 3, 4, 5, and 6 by terminal screws. These terminal plates 7,
The extensions of 8 and 9 are formed in the casing 2 as a fixed contact 7a, and a movable contact 11 built in the casing 2 and responsive to the movable rod 10 faces the fixed contact 7a and can move towards and away from the fixed contact 7a. .

The inner walls of the first and fourth barriers 3 and 6 have concave locking portions 3 that lock the upper surface of the terminal protection cover, which will be described later.
a, 3b, 6a, 6b are formed, and as is clear from FIG. 2, the left and right locking portions 3a, 6a are longer than the right locking portions 3b, 6b.

The terminal protection cover 12 is made of a flexible plate made of synthetic resin, and has a cutout in the center in a desired shape.
Let the wall thickness be t. On both sides of the notch part, a covering part 13 is formed protruding from the center so as to hide the parts of the terminal plates 7, 8, and 9 between the barriers 3, 4, 5, and 6, and the forming gap d ₀ is , 5, and 6, and the distance D between the proximal ends of the covering portion 13 is longer than the distance D' between the ends of the corresponding barriers 3, 4, 5, and 6. In addition, the portions that abut the inner walls of the first and fourth barriers 3 and 6 include locking portions 3a,
6a, and the locking portion 3 on the other side.
A protrusion 13b that engages with the locking portions 3a, 6b is provided, and its shape growth d ₁ , d ₂ corresponds to the corresponding concave locking portion 3a, 3
The shape growth should be approximately equal to that of b, 6a, and 6b.

Reference numeral 14 denotes a positioning hole for centering that is formed in a notched state orthogonal to the direction in which the covering portion 13 is formed. When the positioning hole 14 is attached to the electromagnetic contactor 1, the terminal protection cover 14 is fitted into the protrusion 16 of the cover receiving part 15 formed in a protruding state on both sides of the casing 2, and
It has the function of positioning during installation and preventing the terminal protection cover 12 from coming off in the lateral direction when installing. That is, the tip position of the protrusion 16 and the first and fourth
The difference in height between the locking portions 3a, 3b, 6a, and 6b of the barriers 3 and 6 and the position of the upper wall surface F of the terminal protection cover 1 is
By setting the thickness to be smaller than 2, the terminal protection cover 12 will not come off naturally due to disengagement between the protrusion 16 and the positioning hole 14.

Furthermore, the level of the mounting surface 15a of the cover receiving part 15 (distance from the lower end of the casing 2) is adjusted to l ₁ as shown in FIG. , 6b, when the level of the upper wall surface _F of the terminal protection cover ₁₂ is l ₂ as shown in FIG. Even after the terminal protection cover 12 is attached, the terminal protection cover 12 is maintained in a bent state, so that rattling between the terminal protection cover 12 and the locking portion of the casing 2 can be prevented.

To attach the terminal protection cover 12, first tilt the terminal protection cover 12 as shown in FIG. , 6 so as to be inserted into the locking portions 3a, 6a.
Then, press the other end side in the direction of the arrow, and when the right covering part 13 reaches a level where it can be inserted into the locking parts 3b and 6b, move the cover 12 by a small amount to the right in FIG. 4. Then, the positioning hole 14 is engaged with the protrusion 16 and fixed by the movement and the pressing force.

The terminal protection cover 12 has its central portion supported by the cover mounting surface 15a of the casing 2, and the covering portions 13 on both sides are supported by the locking portions 3a, 3b, 6a, and 6a of the barrier 36, respectively.
6b. Since the levels of the support points are different according to the relationship expressed by equation (1), the cover 12 can be mounted by bending both ends of the cover 12 downward and utilizing this elastic deformation. That is, this cover 12
Both protrusions 1 of the cover 12 are bent and deformed.
3a, 13b are inserted into the upper wall surface F of the locking portions 3a, 3b, 6a, 6b of the first and fourth barriers 3, 6 while applying an elastic reaction force, in the left-right direction in FIG. Also, when the protrusions 13a, 13b and the locking parts 3a, 3b, 6a, 6b engage with each other, and the positioning hole 14 engages with the protrusion 16, the elastic deformation returns, and the installation is completed. In this way, the cover 12 is mounted in a predetermined position by the engagement of the protrusions 13a, 13b with the locking parts 3a, 3b, 6a, 6b and the engagement of the positioning hole 14 with the protrusion 16.

To remove the cover 12, first lift the central part of the cover upwards to disengage the positioning hole 14 and the protrusion 16, and then move it to the right side in FIG.
This can be easily done by releasing the locking between the locking parts a, 13b and the locking parts 3a, 3b, 6a, 6b and reversing the mounting procedure.

Note that the shapes of the positioning hole 14 and the protrusion 16 are not limited to the illustrated embodiment; for example, as shown in FIG. Positioning is possible even when a groove 21 into which the protrusion 20 can fit is provided. Furthermore, as shown in FIG. 7, a chevron-shaped protrusion 22 whose upper end has the minimum cross-sectional area from the mounting surface 15a
It is also possible to form a protrusion and make it possible to fit into the positioning hole 14. In this case, when removing the cover 12, if you pull it with strong force, it will ride on the slope of the chevron-shaped protrusion 22 and naturally bend, releasing the engagement. be able to.

In addition, the shapes of the positioning hole and the protrusion are not particularly limited and can be arbitrarily selected as long as engagement for positioning is possible.

[Effect of idea]

As described above, in the present invention, the locking parts that receive the upper surface of the elastic terminal protection cover are formed on both sides of the terminal forming part of the electrical equipment, and the mounting surface is formed in the center, and the mounting surface is A positioning engagement portion for the terminal protection cover is provided, and the height of the mounting surface is determined by subtracting the thickness of the terminal protection cover from the height of the wall surface in contact with the top surface of the terminal protection cover at the locking portion. It is set higher than that. This results in
The terminal protection cover utilizes the deflection between the central mounting surface of the electrical device and the locking parts on both sides to easily and reliably hold it in place without using any other mounting parts. It can be removed.
Further, the terminal protection cover is reliably held in a predetermined position by the positioning engagement portion. Furthermore, since the engagement is performed using the return of elastic deformation, the terminal protection cover will not come off naturally.

In the above, when removing the terminal protection cover, the terminal protection cover can be easily removed without using any tools by bending the terminal protection cover to such an extent that the engaging portion comes off.

As described above, according to the present invention, the terminal protection cover can be easily attached to and detached from the electrical equipment without requiring any special connection mechanism, and it can be securely attached to the predetermined position and does not come off naturally. Therefore, the terminal part can be reliably hidden and protected.

In addition, since the height of the mounting surface is set higher than the height of the wall surface with which the top surface of the terminal protection cover contacts in the locking portion minus the thickness of the terminal protection cover, the terminal protection A restoring force due to the deflection of the cover is applied between the locking portion and the mounting surface, thereby preventing the terminal protection cover from wobbling in the attached state.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an electromagnetic contactor to which the terminal protection cover mounting structure according to the present invention is applied, and Fig. 2 is a view taken along the line I-I in Fig. 1, showing the upper part of the electromagnetic contactor. 3 is a plan view of the terminal protection cover, FIG. 4 is a side view of the electromagnetic contactor with the terminal protection cover attached, FIG. 5 is a perspective view showing the barrier part of the electromagnetic contactor, and FIG. 7 are side views of essential parts showing another form of positioning. 1...Magnetic contactor (electrical equipment), 2...Casing, 3, 4, 5, 6...Barrier, 3a, 3b,
6a, 6b...Locking portion, 7, 8, 9...Terminal board,
7a... Fixed contact, 10... Movable rod, 11...
Movable contact, 12...Terminal protection cover, 13...
Recovered portion, 13a, 13b...Protrusion, 14...Positioning hole, 15...Cover receiving portion, 15a...Placement surface, 16...Protrusion (positioning engagement part), 20...
Projection, 21... chevron projection.

Claims (1)

[Scope of utility model registration request] A locking portion for receiving the upper surface of a flexible plate-like terminal protective cover made of synthetic resin is formed on both sides of the terminal forming portion of an electrical device having exposed terminals on both sides,
A mounting surface for receiving the lower surface of the terminal protection cover is formed at an intermediate portion of the locking portions on both sides, and a positioning engagement portion for the terminal protection cover is provided on the mounting surface, and Terminal protection cover mounting structure for electrical equipment, characterized in that the height is set higher than the height of the wall surface with which the top surface of the terminal protection cover contacts in the locking portion minus the thickness of the terminal protection cover. .