JPH0541033U - Switch misoperation prevention structure - Google Patents

Abstract

(57) [Abstract] [Purpose] Concerning the structure for preventing the erroneous operation of the switch attached to the inside of the front panel such as the operation panel, the cover plate can be opened and closed with one touch, and the switch can be operated promptly in an emergency. With the goal. A panel embedding box 1 having an operation hole 1b which is fitted in a mounting hole of a surface panel 3 and operates a switch 5 attached to the inside of the surface panel, and an opening of the panel embedding box. A spindle 2a having a cam 2a-1 which is formed in a plate shape so as to close the center of the inner surface of the plate and has a flat surface perpendicular to the radial direction and a curved surface at a position where the radius of curvature exceeds the axial center. The panel embedding box is provided with a cover plate 2 integrally protruding from the panel plate, a plate spring 1e for spring-pressing the cam surface of the cover plate, and a shaft hole for pivotally mounting a support shaft of the cover plate. Is rotated about the spindle and held in the open state at the flat surface position of the cam,
When the cover plate is released at the curved position, it automatically returns to the closed state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switch erroneous operation prevention structure. For pushbutton switches, snap switches, etc. attached to the inside of the front panel of the operation panel, etc., there is a demand for an erroneous operation prevention cover that protects the switch from being operated normally and can be easily operated in an emergency. There is.

[0002]

[Prior Art]

 Conventionally, as shown in the front view and the side sectional view of the main parts of FIGS. 6 (a) and 6 (b), the switch 14 attached to the inside of the operation hole 11a of the front panel 11 (the figure shows a snap type). The cover plate 12 for protecting) is provided with a burrow hole 12a at one end, and is attached to the screw hole 11b of the front panel 11 with a thumb screw 13. When the thumbscrew 13 is loosened, the cover plate 12 rotates left and right around the thumbscrew 13. When operating the switch 14 with the cover plate 12 open, tighten the thumbscrew 13 and when you have finished operating the switch 14, loosen the knob screw 13 and return the cover plate 12 to the specified position. It is fixed with screws.

[0003]

[Problems to be solved by the device]

 However, according to such an erroneous operation prevention structure, it takes time to loosen the thumbscrew and rotate the cover plate, and there is a problem that it is difficult to respond promptly to an emergency.

In view of the above problems, it is an object of the present invention to provide an erroneous operation prevention structure for a switch, which can open and close the cover plate with one touch and can operate the switch quickly in an emergency.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in a switch misoperation preventing structure according to the present invention, a panel having an operation hole that is fitted into a mounting hole of a front panel and operates a switch attached inside the front panel. The embedding box and the panel embedding box are formed in a plate shape so as to close the opening of the panel embedding box, and at the center of one end of the inner surface of the plate, a flat surface perpendicular to the radial direction and a position where the radius of curvature exceeds the axial center The panel embedding includes a cover plate integrally provided with a support shaft having a cam formed of a curved surface, and a shaft spring for spring-pressing a cam surface of the cover plate and a support shaft of the cover plate. It is equipped with a box, and it is constructed so that the cover plate is rotated about the spindle to hold it in the open state at the flat surface position of the cam, and automatically returns to the closed state when the cover plate is released at the curved surface position. ..

[0006]

[Action]

 In the cover plate, a support shaft having a cam with a flat surface and a curved surface is integrally projected at one end of the plate, and the support shaft pivotally attaches to the panel-embedded box and presses the cam surface with a leaf spring. When the cover plate is rotated about the spindle and the flat surface of the cam comes into contact, the flat surface is perpendicular to the semi-radial direction, so the drag force passes through the center of the spindle, and the resistance against the cover plate. The cover plate can be held in the open state without any rotational moment. In addition, when the curved surface of the cam comes into contact, since the radius of curvature of the curved surface exceeds the axial center, the drag force deviates from the center of the spindle, causing a rotation moment with respect to the cover plate, and releasing the hand. The cover plate will automatically return to its closed position when released.

[0007]

【Example】

 Hereinafter, the gist of the present invention will be described in detail with reference to the embodiments shown in the drawings. As shown in the front view and the side view of the main part assembly of FIGS. 1 (a) and 1 (b), the switch erroneous operation prevention structure includes a panel embedding box 1 and a panel embedding box 1 to be fitted into the front panel 3. The cover plate 2 covers and opens and closes the front opening.

The panel-embedded box 1 is made of synthetic resin and has upper and lower flanges 1a as shown in the front view and the side view of FIGS. 2 (a) and 2 (b), and is shown by a chain double-dashed line on the bottom surface. An oblong operation hole 1b for operating the switch 5 (see FIG. 1) attached to the inside of the surface panel 3 is formed, and the mounting holes 3a of the surface panel 3 are formed on the outer surfaces of the upper and lower side walls. When it is fitted in the spring, the spring is displaced, and after the fitting, the spring is repelled and the locking tongue 1c is locked to the inner surface of the hole edge so as to project.

As shown in the front view and the side view of FIGS. 3 (a) and 3 (b), the cover plate 2 covers the opening of the panel embedding box 1 and has a plate shape so as to open and close along the opening surface. A support shaft 2a having a via barrel-shaped cam 2a-1 is integrally projected at the center of one end of the inner surface of the plate, the flat surface and the arc-shaped curved surface facing each other symmetrically about the center of the axis and having a via barrel-shaped cam 2a-1. To do.

Further, as shown in FIG. 1, both ends of the panel embedding box 1 are fitted into grooves 1d formed on the inside of the left and right side walls so that the cam 2a-1 is sandwiched and the cam surface is spring-pressed as shown in FIG. It is provided with two facing leaf springs 1e curved in an arcuate shape, and a shaft hole 1f for pivotally mounting the tip end of the support shaft 2a of the cover plate 2. The retaining collar 4 is fixed to the support shaft 2a that has penetrated the shaft hole 1f.

Next, the opening / closing operation of the cover plate 2 when operating the switch 5 will be described with reference to the front views of FIGS. 4 and 5. Turn the cover plate 2 around the support shaft 2a 90 degrees counterclockwise with the fingertip. When the flat surface of the cam 2a-1 contacts the leaf spring 1e, the reaction force against the spring pressure is directed toward the center of the support shaft 2a and no rotational moment is generated with respect to the cover plate 2, so the cover plate 2 is held in the open state. It

When the cover plate 2 is rotated about 60 degrees and the curved surface comes into contact with the plate spring 1e, a clockwise rotation moment is generated with respect to the cover plate 2 and the cover plate 2 is released. For example, it automatically returns to the initial position (vertical state).

As described above, the cover plate can be quickly opened and closed by rotating the cover plate with the fingertip. It can be closed automatically by opening it in the middle and operating the switch to release the finger from the cover plate. It can be held in the open state by further rotating it to a flat surface position.

Since these opening / closing operations can be performed with a single touch, it is possible to open / close quickly in an emergency. Especially, when the cover plate is opened in the middle, the cover plate is automatically closed, so the closing motion can be omitted. The advantage is that you don't forget to close the cover plate.

Although two leaf springs are used facing each other in the above description, either one may be used.

[0016]

[Effect of the device]

 As described above in detail, according to the present invention, since the cover plate can be opened and closed quickly, particularly in an emergency, the protection can be released immediately and easily and the switch can be operated in a short time, which is extremely useful in practice. Exerts a great effect.

[Brief description of drawings]

FIG. 1 is a front view and a side view of an essential part assembly of an embodiment according to the present invention.

FIG. 2 is a front view and a side view of the panel embedding box in FIG.

FIG. 3 is a front view and a side view of the cover plate of FIG.

FIG. 4 is a front view illustrating a fully opened cover plate of FIG.

FIG. 5 is a front view illustrating the middle opening of the cover plate of FIG.

FIG. 6 is a front view and a side sectional view of a main part assembly according to a conventional technique.

[Explanation of symbols]

 1 is a panel embedding box 1b is an operation hole 1e is a leaf spring 2 is a cover plate 2a is a spindle 2a-1 is a cam 3 is a front panel 3a is a mounting hole 5 is a switch

Front page continuation (72) Hiroyuki Abe Creator Hiroyuki Abe 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Fujitsu Limited

Claims (1)

[Scope of utility model registration request] 1. A panel provided with an operation hole (1b) which is fitted in a mounting hole (3a) of a front panel (3) and operates a switch (5) attached to the inside of the front panel (3). Embedded box (1),
Formed in a plate shape so as to close the opening of the panel embedding box (1), at the center of one end of the inner surface of the plate, a flat surface perpendicular to the radial direction and a curved surface at a position where the radius of curvature exceeds the axis Cover plate with a support shaft (2a) integrally protruding from the cam (2a-1)
(2) and a leaf spring that presses against the cam surface of the cover plate (2)
(1e) and a shaft hole (1f) pivotally supporting the support shaft (2a) of the cover plate (2) are provided in the panel embedding box (1), and the cover plate (2) is attached to the support shaft (2a). ) Misoperation of the switch characterized by turning to the center and holding it in the open state at the flat surface position of the cam (2a-1) and automatically returning to the closed state by releasing the cover plate (2) at the curved surface position. Prevention structure.