JPH0513037Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a leaf spring for electromagnetic shielding, and particularly to a leaf spring for electromagnetic shielding that is easy to perform electromagnetic shielding work and is less likely to undergo plastic deformation due to use.

(Prior art and its problems) FIG. 6 is a perspective view showing a conventional electromagnetic shielding leaf spring, and FIG. 7 is a side view thereof.

As shown in FIGS. 6 and 7, the conventional electromagnetic shielding plate spring has a plurality of contact protrusions 14 arranged in series along one long side of a rectangular elastic thin metal plate 11, and these contact protrusions It is formed by bending the piece 14 to one side of the elastic metal thin plate 11.

Each contact protrusion 14 is perpendicular to the longitudinal side of the elastic thin metal plate 11, and is approximately parallel to the surface of the elastic thin metal plate 11, as shown in FIG.

A conventional electromagnetic shielding plate spring has a first plate spring having a stepped portion.
Can be attached to metal fittings. That is, the elastic metal thin plate 11 is placed on the lower mounting surface of the first metal fitting,
The other long side of the elastic thin metal plate 11 is fixed to the upper part of the first metal fitting.

When performing electromagnetic shielding work, the contact protrusion 12 is pressed with a second metal fitting having a hook-shaped tip. At this time, the electromagnetic shielding plate spring exhibits elasticity.

Since the contact protrusion 14 is perpendicular to the long side of the elastic thin metal plate 11, the tip of the contact protrusion 14 is
In order to prevent the contact protrusion 14 from hitting the upper part of the metal fitting, the contact protrusion 14 cannot be made too long.

However, if the contact protrusion 14 is short, a large force is required in the pressing operation performed by the second metal fitting to elastically deform the contact protrusion 14 during electromagnetic shielding work, and the deformation of the contact protrusion 14 occurs in the elastic range. There is a problem in that plastic deformation is likely to occur if the

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a means in which a plurality of contact protrusions are arranged at regular intervals along one longitudinal side of a rectangular elastic thin metal plate. In an electromagnetic shielding leaf spring that is provided integrally with the elastic thin metal plate and in which the contact protrusion is bent on one side of the elastic thin metal plate, the longitudinal axis of the tip of the contact protrusion is aligned with the elastic thin metal plate. The contact protrusion is inclined obliquely to the longitudinal side, and the tip of the contact protrusion is curved.

(Example) Next, the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view showing an electromagnetic shielding leaf spring according to an embodiment of the present invention, Fig. 2 is an enlarged plan view showing a part thereof, and Fig. 3 is a side view of the electromagnetic shielding leaf spring of Fig. 1. , FIG. 4 is a sectional view showing the state in which the electromagnetic shielding leaf spring shown in FIG. 1 is attached to the first metal fitting, and FIG. 5 is a sectional view showing the state in which the electromagnetic shielding leaf spring shown in FIG. 1 is used. .

In the figure, 1 is an elastic metal thin plate, 2 is a first metal fitting, and 3
is the second metal fitting, 4 is the contact protrusion, 4a is the tip, 4
b is the base.

In the case of this embodiment, as shown in FIG. 1, a plurality of contact protrusions 4 are integrally provided along one long side of a rectangular elastic metal thin plate 1 at regular intervals. One side of the elastic metal thin plate 1 is bent.

As shown in FIG. 2, the tip 4a of the contact protrusion 4 is obliquely inclined with respect to the longitudinal side of the elastic thin metal plate 1.

The base portion 4b of the contact protrusion 4 is perpendicular to the longitudinal side of the elastic thin metal plate 1.

The tip 4a of the contact protrusion 4 is gently curved, as shown in FIG.

The base portion 4b of the contact protrusion 4 is approximately parallel to one side of the elastic thin metal plate 1.

To perform electromagnetic shielding work, as shown in FIG. 4, attach the electromagnetic shielding plate spring to the first metal fitting 2, and as shown in FIG. is pressed from above using the second metal fitting 3. The tip end 4a of the contact protrusion 4 is connected to the elastic thin metal plate 1.
Since it is tilted diagonally with respect to the long side of (second
(see figure), the total length of the contact protrusion 4 is correspondingly longer than that of the conventional one, and the contact protrusion 4 does not collide with the first metal fitting 2. Therefore, the elastic limit for the same load is higher than that of conventional electromagnetic shielding leaf springs,
A large force is not required for the pressing operation by the second metal fitting 3, and plastic deformation is less likely to occur, furthermore, the straightness of electromagnetic waves is hindered.

According to the electromagnetic shielding plate spring of this embodiment, the tip 4a of the contact protrusion 4 is inclined obliquely to the longitudinal side of the elastic thin metal plate 1, and the base 4b of the contact protrusion 4 is is perpendicular to the long side of the contact protrusion 4, the tip 4a of the contact protrusion 4 is curved, and the base 4b of the contact protrusion 4 is approximately parallel to one side of the elastic thin metal plate 1. The elastic limit is increased, and the electromagnetic shielding work by the second metal fitting 3 becomes easier, and it becomes difficult to be plastically deformed, and the shielding effect is also improved because the straightness of electromagnetic waves can be obstructed.

(Effects of the invention) As explained above, according to the electromagnetic shielding leaf spring of the present invention, the elastic limit for the same load is increased, so the electromagnetic shielding work becomes easier, and plastic deformation becomes less likely. The electromagnetic shielding effect is also further improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an electromagnetic shielding leaf spring according to an embodiment of the present invention, Fig. 2 is an enlarged plan view showing a part thereof, and Fig. 3 is a side view of the electromagnetic shielding leaf spring of Fig. 1. , FIG. 4 is a sectional view showing the electromagnetic shielding leaf spring shown in FIG. 1 attached to the first metal fitting, FIG. 5 is a sectional view showing the state in which the electromagnetic shielding leaf spring shown in FIG. FIG. 6 is a perspective view showing a conventional electromagnetic shielding leaf spring, and FIG. 7 is a side view thereof. 1, 11... Elastic metal thin plate, 2... First metal fitting, 3... Second metal fitting, 4, 14... Contact protrusion piece,
4a... tip, 4b... base.

Claims (1)

[Scope of utility model registration request] A plurality of contact protrusions are provided integrally with the rectangular elastic metal thin plate at regular intervals along one long side of the elastic metal thin plate, and the contact protrusions are bent toward one side of the elastic metal thin plate. In the electromagnetic shielding plate spring, the longitudinal axis of the tip of the contact protrusion is obliquely inclined with respect to the longitudinal side of the elastic thin metal plate, and the tip of the contact protrusion is curved. A plate spring for electromagnetic shielding.