JPH0740302Y2 - Electrical parts with terminal cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electric component with a terminal cover, and more particularly to a mounting structure for a terminal cover.

[Prior Art] As an electric component with a terminal cover, there is, for example, a transformer case in which a transformer is housed. FIG. 4A shows a conventional transformer case. The case 10 is a transformer (not shown)
The rear lid 3 is fixed to the housing 10.
The rear lid 3 is provided with a connection hole 3a, and is fitted and fixed to a connection protrusion 10t provided on the housing 10. Rear side 3 of back cover 3
From the terminal holes 32, 33 provided in B, the terminals 32t,
33t is exposed. An insulating wall 70 is formed on the back surface 3B of the rear lid 3. This insulating wall 70 is for ensuring the insulating properties of both the terminals 32t and 33t of the transformer.

The transformer case is usually provided with a terminal cover 14 as shown in FIG. 4A for the purpose of preventing short circuit accidents and preventing electric shock to workers. The terminal cover 14 is attached so as to cover the terminals 32t and 33t. FIG. 4B shows a front view of the terminal cover 14,
A side view is shown in FIG. Fitting portions 12 and 13 are formed on the front surface of the terminal cover 14. The fitting portions 12 and 13 are fitted into the terminals 32t and 33t, so that the rear lid 3
Attached to.

Also, the terminal cover 14 is provided with through holes 12x and 13x (see FIGS. 4A and 4B). The through holes 12x and 13x are provided so that the terminals 32t and 33t can be tightened by using a screwdriver or the like with the terminal cover 14 attached to the rear cover 3.

[Problems to be Solved by the Invention] However, the above-mentioned conventional electric parts such as a transformer case have the following problems.

After attaching the terminal cover 14 to the rear cover 3, the terminals 32t, 33t
May need to be tightened further. In such a case, insert a screwdriver, etc. into the through holes 12x, 13x and connect the terminals 32t, 3
Screw in 3t. However, for the terminals 32t and 33t, the terminal cover 1
The four fitting parts 12 and 13 are fitted. For this reason, the terminal cover may fall off from the rear lid 3 under the influence of the rotation due to the screwing, which causes a reduction in working efficiency.

Also, when wiring the transformer case, for example, the terminal 32
Two lead wires may be connected to t and one lead wire may be connected to the terminal 33t (not shown). In such a case, the heights of the terminals 32t and 33t in the direction of the arrow 300 differ. Along with this, there is a problem in that the terminal cover 14 is also tilted and lacks stability.

Therefore, an object of the present invention is to provide an electric component that is highly reliable without being affected by rotation or the like caused by screwing in a terminal.

[Means for Solving the Problem] An electric component with a terminal cover according to claim 1 is a casing, a connecting protrusion provided on the casing, and including a protrusion arm and a protrusion mountain portion located at the tip of the protrusion arm. A connection projection, a connection hole into which a projection mountain portion of the connection projection is fitted, and a terminal hole for exposing a terminal are formed, and a projection mountain portion of the connection projection is fitted. A terminal cover having a connection arm in which a matching terminal cover connection hole is formed, the terminal cover being attached to the housing and being positioned so as to cover the terminal and ensuring the insulation property of the terminal, A part of the protrusion ridge of the connection protrusion is configured as a large protrusion ridge, and a portion excluding the large protrusion ridge is configured as a small protrusion ridge, and the large protrusion ridge is a connection hole of the rear lid. To the height protruding from the connection hole when Is formed, and the small projection mountain portion is formed at a height that does not protrude from the connection hole when fitted into the connection hole of the rear lid, and is formed in the terminal cover connection hole formed in the connection arm of the terminal cover. The terminal cover is attached to the housing by fitting the large protrusion mountain portion protruding from the connection hole of the rear lid.

The electrical component with a terminal cover according to claim 2 is the electrical component with a terminal cover according to claim 1, wherein the rear lid has a plurality of terminal holes exposing a plurality of terminals, and the rear lid is exposed from the plurality of terminal holes. The terminal cover is provided with an insulating wall for ensuring insulation between the terminals, and the terminal cover is provided with an auxiliary fixing portion that abuts against the insulating wall.

[Operation] In the electric component with the terminal cover according to claim 1, the terminal projection connection hole formed in the connection arm of the terminal cover is fitted with the large projection crest protruding from the connection hole of the rear lid. The terminal cover is attached to the housing. Therefore, the terminal cover is not affected by the tightening of the terminals.

In addition, a part of the protrusion ridge of the connection protrusion is configured as a large protrusion ridge, and a portion other than the large protrusion ridge is configured as a small protrusion ridge. The large projection ridge is formed at a height protruding from the connection hole when fitted in the connection hole of the rear lid, and the small projection ridge does not protrude from the connection hole when fitted in the connection hole of the rear lid. Formed at height.

In this way, both the small projection ridges and the large projection ridges of the protrusion ridges fit into the connection holes formed in the rear lid, and the terminal cover connection holes formed in the connection arm of the terminal cover. Only the large protrusion crests protruding from the connection hole of the rear lid are fitted into the. Therefore, the rear cover is firmly fixed to the housing, while the terminal cover is easily attached to and detached from the housing.

Further, the large projection crest portion that fits into the terminal cover connection hole is configured as a part of the projection crest portion. Therefore, it is not necessary to provide a protrusion for connecting the terminal cover at a portion different from the protrusion crest portion.

In the electric component with the terminal cover according to the second aspect, the terminal cover includes the auxiliary fixing portion that comes into contact with the insulating wall.
Therefore, the stability of the terminal cover can be secured by the auxiliary fixing portion coming into contact with the insulating wall.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. Figure 1A
Shows the transformer case according to the present invention. The housing 10 is provided with a connection protrusion 2, and a transformer (not shown) is provided inside the housing 10.
have. A connection protrusion 2 is provided on the housing 10, and the rear lid 3 is fixed by the connection protrusion 2. That is, the connection protrusion 2 is fixed by being fitted into the connection hole 3a provided in the rear lid 3.

The rear lid 3 is provided with terminal holes 32 and 33.
The terminals 32t and 33t of the transformer are exposed from the rear surface 3B of the rear lid 3 from the terminals 2,3 and 33t. Further, an insulating wall 70 is formed on the back surface 3B of the rear lid 3. Insulation wall 70 includes terminals 32t and 3 as shown.
Positioned between 3t (see Fig. 2A), both terminals 32t, 33
The insulation of t is secured.

The terminal cover 4 shown in FIG. 1A is attached to the transformer case in order to prevent a short circuit accident, an electric shock accident, and the like. The terminal cover 4 includes connection arms 42 and 43.
At the tips of the connection arms 42 and 43, connect the terminal cover connection holes 42
a, 43a are provided, and this terminal cover connection hole 42a, 43a
Is adapted to be fitted to the connection protrusion 2 provided on the housing 10. That is, the connection protrusion 2 used for fixing the rear lid 3 is also used as the protrusion for attaching the terminal cover 4. FIG. 1B shows a state in which the terminal cover 4 is attached.

In order to save space when installing the transformer case, it is desirable that the outer shape of the transformer case is small. In FIG. 2A,
If the connection protrusions are provided in the four sides of the rear lid 3, the outer shape of the transformer case is increased by the four connection protrusions.
For this reason, in this embodiment, the connecting projections 2 are provided only in the two side directions to reduce the outer shape. Further, in order to reduce the outer shape of the transformer case, the connecting protrusion 2 has a structure as shown in FIG.

FIG. 3 shows the connection protrusion 2 and the connection hole 3a of the rear lid 3 provided on the housing 10. The terminal cover 4 is not shown in the drawing. As shown in FIG. 3, the connection protrusion 2 is composed of a protrusion arm 2Y and a protrusion mountain portion 2M located at the tip of the protrusion arm 2Y. The protrusion mountain portion 2M is composed of a small protrusion mountain portion 22 and a large protrusion mountain portion 24. O protrusion mountain part
The protrusion length 24f of 24 is formed longer than the protrusion length 22f of the small protrusion mountain portion 22. Then, when fixing the rear lid 3 to the housing 10, the rear lid 3 is moved in the direction indicated by the arrow 100 and the projection crest portion 2M of the connection projection 2 is fitted into the connection hole 3a. Case 10
Since the rear lid 3 is made of resin or the like, the connecting projection 2 is elastically moved in the direction indicated by the arrow 150 and the sliding portion 39s of the rear lid 3 is elastically moved in the direction indicated by the arrow 152 with the movement in the direction of the arrow 100. It transforms into and fits into each other.

The depth 3f of the connection hole 3a provided in the rear lid 3 is substantially equal to the protruding length 22f of the small protrusion mountain portion 22. That is, when the protrusion ridge 2M is fitted in the connection hole 3a, only the tip end 24s of the lower protrusion ridge 24 projects from the flat surface 39 of the rear lid 3. Figure 1A
This protruding tip portion 24s is shown in FIG. In this way, the outer shape of the electric component is kept small.

In addition, the connection hole 3a of the rear lid 3 has a large protrusion mountain portion 24 and a small protrusion mountain portion.
Both of them are fitted together, and the large projection crest portion 24 penetrates the connection hole 3a and the tip portion 24s projects. Therefore, the rear lid 3 is more firmly fixed to the housing 10. On the other hand, since the terminal cover 4 is attached only by the tip portion 24s of the large projection crest portion 24, it can be easily attached and detached, which is convenient when connecting lead wires to the terminals 32t and 33t.

FIG. 1B shows a state in which the terminal cover 4 is attached in the direction shown by the arrow 100 (see FIG. 1A). Since the terminals 32t and 33t are exposed and located in the cover space 4S between the back surface 3B of the rear lid 3 and the terminal cover 4, the lead wire or the like can be connected with the terminal cover 4 attached. Also, the terminal cover 4
Are held by the connection protrusions 2. Therefore, even when the terminals 32t and 33t are tightened with a screwdriver or the like through the cover through holes 42X and 43X provided in the terminal cover 4, the terminal cover 4 is removed due to the influence of the rotation of the terminals 32t and 33t. There is nothing to do. Further, even when crossover wiring is provided, the terminal cover 4 does not tilt.

The terminal cover 4 includes auxiliary fixing portions 42h and 43h. 2A shows a rear view of the rear cover 3 and FIG. 3B shows a front view of the terminal cover 4. When the terminal cover 4 is attached to the housing 10,
Auxiliary fixing space 70S between the auxiliary fixing portions 42h and 43h (Fig. 2B)
Insulation wall 70 is inserted to the auxiliary fixing part 42h, 43h
Abuts the insulating wall 70. "Abutting" means located in contact.

In this way, the auxiliary fixing portions 42h and 43h contact the insulating wall 70,
In addition, the insulating wall 70 is located so as to sandwich it from both sides. Therefore,
It is possible to prevent the terminal cover 4 from tilting in the direction indicated by the arrow 162 (see FIG. 2A). Also, the auxiliary fixing portion 42
The h and 43h contact the back surface 3B of the rear lid 3 to form contact portions 42k and 43k. Therefore, it is possible to prevent the terminal cover 4 from moving in the direction indicated by the arrow 160 (see FIG. 1B).

When the insulating wall 70 is provided at the position shown by the imaginary line 77 (see FIG. 2A), the auxiliary fixing portions 42h and 43h may be provided at the corresponding positions (not shown). In this case, the contact portion of the auxiliary fixing portion is located substantially perpendicular to the arrangement line of the two connecting protrusions 2. Therefore, even if the auxiliary fixing portion to be formed is single, the terminal cover 4 has the arrow 162,
It is possible to prevent tilting in the 160 direction (see FIGS. 2A and 1B).

As shown in FIG. 2A, both the connection protrusions 2 are located offset from the center line 55 (a straight line parallel to the insulating wall 70). Therefore, it is possible to prevent the terminal cover 4 from moving in the direction indicated by the arrow 162 and ensure stability. Note that the stability of the terminal cover 4 can be increased as the displacement width Wi of the two connection protrusions 2 around the center line 55 is increased.

[Advantage of the Invention] In the electric component with a terminal cover according to the first aspect, the large projection mountain portion protruding from the connection hole of the rear lid is fitted into the terminal cover connection hole formed in the connection arm of the terminal cover. Thus, the terminal cover is attached to the housing.

That is, the terminal cover is not affected by the tightening of the terminals. Therefore, the terminal cover does not fall off during work, and the work efficiency can be improved.

In addition, a part of the protrusion ridge of the connection protrusion is configured as a large protrusion ridge, and a portion other than the large protrusion ridge is configured as a small protrusion ridge. The large projection ridge is formed at a height protruding from the connection hole when fitted in the connection hole of the rear lid, and the small projection ridge does not protrude from the connection hole when fitted in the connection hole of the rear lid. Formed at height.

In this way, both the small projection ridges and the large projection ridges of the protrusion ridges fit into the connection holes formed in the rear lid, and the terminal cover connection holes formed in the connection arm of the terminal cover. Only the large protrusion crests protruding from the connection hole of the rear lid are fitted into the.

That is, the rear lid is firmly fixed to the housing, while the terminal cover is easily attached to and detached from the housing. Therefore, the rear cover can be securely fixed to the housing to obtain a highly reliable electric component, and the terminal cover can be easily attached / detached to obtain a convenient electric component when connecting the lead wire to the terminal. You can

Further, the large projection crest portion that fits into the terminal cover connection hole is configured as a part of the projection crest portion. That is, it is not necessary to provide a protrusion for connecting the terminal cover at a portion different from the protrusion crest portion. Therefore, miniaturization of the electric component can be realized.

In the electric component with the terminal cover according to the second aspect, the terminal cover includes the auxiliary fixing portion that comes into contact with the insulating wall.

That is, the stability of the terminal cover can be ensured by the auxiliary fixing portion coming into contact with the insulating wall. Therefore, a highly reliable electric component can be obtained.

[Brief description of drawings]

1A and 1B are side views of an electric component according to an embodiment of the present invention, FIG. 2A is a rear view of a rear lid shown in FIGS. 1A and 1B, and FIG. FIG. B is a front view of the terminal cover shown in FIGS. 1A and 1B, FIG. 3 is a perspective view showing details of the connection protrusion and the connection hole, and FIG. 4A shows a conventional electric component. FIG. 4B is a front view of the terminal cover shown in FIG. 4A, and FIG. 4C is a side view of the terminal cover shown in FIG. 4A. 2 ... Connection protrusion 3 ... Rear cover 3a ... Connection hole 4 ... Terminal cover 10 ... Housing 32, 33 ... Terminal hole 42, 43 ... Connection arm 42a, 43a ... Terminal cover connection hole 42h, 43h …… Auxiliary fixed part 70 …… Insulation wall

Claims (2)

[Scope of utility model registration request] 1. A housing, a connection projection provided on the housing, the connection projection including a projection arm and a projection mountain portion located at a tip of the projection arm, and the projection mountain portion of the connection protrusion is fitted. A rear lid in which a connection hole is formed and a terminal hole for exposing the terminal is formed, and a terminal having a connection arm in which a terminal cover connection hole into which the projection mountain portion of the connection projection is fitted is formed. A cover that is attached to the housing and that is positioned so as to cover the terminal and that secures the insulation of the terminal. The portion other than the large protrusion mountain portion is configured as a small protrusion mountain portion, and the large protrusion mountain portion is formed at a height protruding from the connection hole when fitted into the connection hole of the rear lid. The small protrusions are fitted into the connection holes on the rear lid. When it is formed at a height that does not protrude from the connection hole, the large projection mountain portion protruding from the connection hole of the rear lid is fitted into the terminal cover connection hole formed in the connection arm of the terminal cover. The terminal cover is attached to the housing, and the electric component with the terminal cover is characterized. 2. The electric component with a terminal cover according to claim 1, wherein the rear lid has a plurality of terminal holes exposing the plurality of terminals, and the rear lid has insulation between the terminals exposed from the plurality of terminal holes. An electrical component with a terminal cover, comprising an insulating wall for securing the terminal cover, and the terminal cover having an auxiliary fixing portion that abuts against the insulating wall.