JPS5936852Y2 - Deformation prevention structure of blade holder spring - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the deformation prevention structure of a blade holder spring, and more specifically, a blade holder spring 3 is installed in a housing 2 of an appliance 1 such as an outlet;・・Ujifugu 2
This relates to a deformable structure for a blade receiving spring, in which a deformation preventing device 4 for preventing the blade receiving spring 3 from being deformed is disposed therein.

The blade holder spring of an appliance such as an outlet is easily deformed when subjected to excessive force by the plug blade, but conventionally the tip of the blade holder spring 3 is attached to the inner surface of the cover 5 as shown in FIGS. 1a and 1b. to prevent deformation.

However, compared to the 1.5 mm plate thickness of the plug blade, the plate thickness of the blade receiving spring 3 is thinner at approximately 0.5 to 1.0 M, so the P
When force is applied in this direction, the blade retaining spring 3 deforms outward as shown in the imaginary line, reducing the contact pressure and easily causing poor contact.Also, if the thickness of the blade retaining spring 3 is made thicker, the tool It is not possible to downsize the device, and the spring properties are poor, resulting in a short opening/closing life.

The present invention has been developed in view of the above points, and its purpose is to provide a deformation prevention device to prevent deformation of the blade holder spring within the housing of an appliance such as an outlet. Even if excessive force is applied to the blade holder spring by the blade, the blade holder spring will not be deformed, and poor contact between the blade holder and the blade holder spring can be prevented, and the thickness of the blade holder spring can be made thinner. To provide a deformation prevention structure for a blade receiving spring that is small, lightweight, and economical, and can improve performance, operational feel, and opening/closing life.

The present invention will now be described in detail with reference to illustrated embodiments.

A housing 2 of an appliance 1 such as an outlet includes a base 6 with an open top surface and a cover 5 with an open bottom surface as shown in FIG.
The lower part of the blade holder spring 3, which is bent into a U-shaped cross section, is attached to the bottom of the base 6.
The upper end of the cover 5 is located directly below the plug blade insertion opening 1 formed in the cover 5.

Both sides of the blade receiving spring 3 are inwardly inclined parts that are inclined inward from the center part in the upper and lower blade direction toward the upper blade, and above each inwardly inclined part is a parallel part 3a. The upper part is an outer inclined part 3b which is inclined outwardly toward the upper side.

As shown in FIGS. 2 and 3, substantially force-shaped cut-and-raised pieces 8 are made to protrude outward approximately horizontally from both upper sides of the blade receiving spring 3, and the tip surfaces of the cut-and-raised pieces 3 are covered with a cover. It faces substantially at right angles through a small gap from the lower surface of the blade receiving spring 3 with a supporting piece 9 which is vertically provided substantially parallel to the parallel portion 3a of the blade receiving spring 3, and this cut-and-raised piece 8 serves as the deformation prevention device 4. There is.

When cutting and bending the pieces 8 on both sides of the blade receiving spring 30, cut and bend the parallel parts 3a KFf@U-shaped cuts upwards as shown in Fig. 4a, or As shown in Fig. 2, a cut is made at the upper end of the outer inclined part 3b and cut and raised on the lower blade. The shape is such that the length of the cut and raised piece 8 protruding from the inner surface of the parallel portion 3a is larger than the dimension a between the ends.

However, when the plug blade 11 of a three-pronged outlet or plug is press-fitted between both parallel parts 3a of the blade receiving spring 3 from the plug blade insertion lower, the second
As shown in the figure, the parallel portion 3a receives force in the direction of the support piece 9 indicated by the arrow P and tries to spread outward, but this is because the cut and raised piece 8 protrudes toward the support piece 9 from the outer sloped portion 3b. When the distal end surface of the cut and raised piece 3 comes into contact with the side surface of the support piece 9, the parallel portion 3a and the outer inclined portion 3b will no longer spread toward the support piece 9 side.

Therefore, even if an excessive force is applied from the blade 11 to the blade holder spring 3, the deformation of the 3 blade holder springs is prevented by the cut-and-raised piece 8, which is the deformation prevention device 4, coming into contact with the side surface of the support piece 9. Therefore, poor contact between the blade 11 and the blade holder spring 3 does not occur, and the plate thickness of the blade holder spring 3 can be made thinner to improve the springiness, and the operational feel and opening/closing life can be extended.

In the above embodiment, the cut-and-raised pieces 8 are cut and raised on both sides of the blade-receiving spring 30, but the cut-and-raised pieces 8 may be provided only on one side of the blade-receiver spring 3 as shown in FIG.

Further, as shown in FIG. 6, a substantially U-shaped portion 3c is provided as a blade receiving spring 3, extending from the lower end of one outer inclined portion 3b in the opposite direction to the inserting direction of the plug blade 11, and extending outward from the other end of the substantially U-shaped portion 3c. The extended mounting portion 3d is fixed to the lower surface of the support piece 9, and the approximately U-shaped portion 3c
The cut and raised piece 8 may be made to protrude from the upper part of the support piece 9 to the side surface side.

7th P shows another embodiment of the present invention, in which the blade receiving spring 3
is formed by an outer inclined portion 3b, a substantially U-shaped portion 3c, and a mounting portion 3d as shown in FIG. The tip of the upper horizontal piece 12a of the terminal plate 12 is made to protrude from the support protrusion 13 toward the blade insertion lower side, and in this state, the mounting part 3d and the upper horizontal piece 12a are attached to the lower surface of the support protrusion 13. Fixing tool 1
It is fixed at 4.

In this case, the portion of the upper horizontal piece 12a that protrudes from the support protrusion 13 toward the plug blade insertion port T side serves as the deformation prevention device 4, and the tip surface of the upper horizontal piece 12a forms a substantially U-shaped portion 3c through a small gap. Even if the substantially U-shaped portion 3c is subjected to a large force on the support protrusion 13 side by the plug blade 11 inserted by the lower plug blade insertion portion, the substantially U-shaped portion 3c will come into contact with the tip direction of the upper horizontal piece 12a. Then, the blade receiver spring 3 is prevented from being bent any further toward the supporting protrusion 13 side, and the upper horizontal piece 12a serving as the deformation preventing device 4 prevents the blade receiving spring 3 from deforming.

As described above, this invention has a deformation prevention device installed in the housing of a device such as an outlet to prevent the blade holder spring from deforming, so even if excessive force is applied to the blade holder spring by the plug blade, The blade holder does not deform, preventing poor contact between the blade and the blade holder spring, and also reduces the thickness of the blade holder to improve springiness, improving operational feel and opening/closing life. In addition, it is possible to provide a structure for preventing deformation of a blade receiving spring that is small, lightweight, and highly economical.

[Brief explanation of the drawing]

Figures 1 a and b are explanatory views of the conventional side, Figures 2 and 3 are explanatory views and front sectional views of an embodiment of the present invention, and Figures 4 a and o are explanatory views of the embodiment of the cut-and-raised piece. FIG. 5 is a front sectional view of another embodiment, and FIGS. 6 and 7 are half sectional views of still another embodiment, where 1 is an instrument, 2 is a housing, and 3 is a blade holder spring. , 4 is a deformation prevention tool.

Claims (1)

[Scope of utility model registration request] A deformation prevention structure for a blade holder spring, which is constructed by installing a blade holder spring inside the housing of an appliance such as an outlet, and arranging a deformation prevention device inside the housing to prevent the blade holder spring from deforming.