JPH0445052Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cover mounting structure for removably attaching a cover to a frame plate (panel) of an operation panel disposed on the exterior of various electronic devices.

Problems to be Solved by the Prior Art In the device described in Japanese Utility Model Application Publication No. 58-97642, the edge of the cover is removably fitted into a groove formed on the operation panel side, or is slidable along the groove. In particular, in the embodiment shown in FIG. 6 of the publication, the bottom of the groove is formed wide, and a locking pawl with an outwardly facing hook is provided at the tip of the cover edge. This locking pawl prevents the cover from being removed unnecessarily.

However, with this cover locking structure, when removing the cover, you must place your finger on the slanted edge of the cover and lift the slanted cover edge upward while applying force toward the center of the cover. The work requires skill and cannot be removed easily, and if you forcibly lift the locking claws into the grooves on the operation panel without removing them, the locking claws on the cover or the grooves on the operation panel may become damaged. The problem was that it was damaged and the surface of the operation panel could not be covered with a cover. When the locking pawl of the cover is engaged with the groove of the operation panel, the cover can move along the groove, so the operation surface of the operation panel is exposed, making it impossible to reliably prevent erroneous operation.

Means and Effects for Solving the Problems The present invention relates to an improvement of the mounting structure for the operation panel cover of an electronic device that eliminates the above-mentioned drawbacks, and provides a cover for removably attaching the cover to the frame plate of the operation panel of the electronic device. In the mounting structure, two side end face parts of the frame plate are formed parallel to each other, and the two side end face parts include:
A substantially semi-cylindrical guide protrusion oriented in the longitudinal direction is integrally provided, and a small protrusion is formed near one end of the guide protrusion closer to the base of the frame plate than the guide protrusion. One end wall of a cover having a shape and dimensions capable of covering the plate is removed, and a substantially semi-cylindrical projection is integrally provided on the inner surface of the second end face portion of the cover near the removed end wall, and the cover While the semi-cylindrical projection of the frame plate is engaged with the guide protrusion of the frame plate, the small protrusion of the frame plate is approached from the longitudinal center portion of the frame plate and climbed over it. Further, the frame plate portion and the cover portion on the side opposite to the protrusion of the cover are provided with locking means for releasably locking the two portions to each other.

Since the present invention is constructed as described above,
When the cover is removed from the frame plate of the operation panel, a substantially semi-cylindrical guide protrusion on the two side end faces of the frame plate has an approximately inner surface near the cutout end wall on the second side end face of the cover. Apply the semi-cylindrical protrusion,
After pushing the cover toward the frame plate, applying force toward one end of the guide protrusion,
The portion of the second end surface of the cover near the cutout end wall elastically expands and deforms, and the substantially semi-cylindrical projection on the second end surface of the cover rides over the substantially semi-cylindrical guide protrusion of the frame plate. After engaging the substantially semi-cylindrical guide protrusion, the substantially semi-cylindrical protrusion of the cover moves along the substantially semi-cylindrical guide protrusion of the frame plate, and engages the small protrusion of the frame plate. It climbs over and is locked to the small protrusion of the frame plate, and the locking means on the opposite side of the small protrusion of the frame plate and the protrusion of the cover is locked.

In this state where the cover is locked to the frame plate, the substantially semi-cylindrical protrusion near the cutout wall at one end of the cover is engaged with the substantially semi-cylindrical guide protrusion of the frame plate. , the locking means on the opposite side is locked to the projection of the cover, so that both ends of the cover are locked, and the small projection of the frame plate and the substantially semi-cylindrical projection of the cover are locked. Due to the locking relationship, the cover is prevented from moving along the approximately semi-cylindrical guide protrusion of the frame plate, so even if a certain amount of force is applied to the cover, the cover remains stable. It is held in a fixed position, and erroneous operations on the operation panel can be reliably prevented.

Further, in the present invention, in a state where the cover is attached to the frame plate, the cutout end wall of the cover is pushed and moved toward the approximate center of the frame plate, and then the cover is pulled away from the frame plate. When a force is applied to the frame plate and the cover, the locking means provided on the frame plate and the cover are released, and after the substantially semi-cylindrical protrusion of the cover climbs over the small protrusion of the frame plate, the two side end surfaces of the cover The portion near the cutout end wall elastically expands and deforms, and the substantially semi-cylindrical protrusion of the cover rides over the substantially semi-cylindrical guide protrusion of the frame plate and comes off, so that the cover is removed from the frame plate. It can be done.

In this way, in the present invention, the cover can be moved along the longitudinal direction of the two side end surfaces of the frame plate and then pulled away from the frame plate at right angles thereto, without requiring any skill. The cover can be easily removed from the frame plate of the operation panel.

Further, in the present invention, when the cover is attached to or detached from the frame plate, the portions of the two side end surfaces of the cover near the cutout end wall elastically expand and deform, and approximately half of the cover is deformed. Since the cylindrical protrusion can smoothly climb over the substantially semi-cylindrical guide protrusion of the frame plate without getting caught,
Large local stresses are not generated in the frame plate and cover, and their durability is high.

Embodiment Hereinafter, an embodiment of the present invention illustrated in FIGS. 1 to 4 will be described.

FIG. 1 shows a resin rectangular frame plate 10 of the operation panel, and a printed wiring board equipped with light emitting diodes (IEDs), operation switches, etc. is attached to the back side of the frame plate 10. The display or operation portion of the frame board 10 can be confirmed and operated through a plurality of small windows 12 formed in the frame board 10.

The frame plate 10 is provided with a pair of fixing tongues 14 on each of two opposing sides, and has a semi-cylindrical shape or a shape close to it extending in the longitudinal direction on the end faces (side end faces) of the two sides. The semi-cylindrical guide protrusion 16 and the collar 18
The semi-cylindrical guide protrusion 16 and the collar 18 are formed with a small interval therebetween, and the interval functions as a cover guide groove 20.

Further, at a position close to one end of the guide groove 20, a semi-cylindrical guide protrusion 1 which crosses the guide groove 20 and whose height is
A small protrusion 22 having a semi-cylindrical shape or a shape similar to the same is formed at the other end of the guide groove 20, and is connected to the semi-cylindrical guide protrusion 16 and has a semi-cylindrical shape curved at a right angle toward the collar 14. A stop projection 24 (having the same height as the semi-cylindrical guide ridge 16) is formed.

Further, a locking projection 28 having a cross-sectional shape similar to that of the semi-cylindrical guide protrusion 16 is formed on the end wall 26 on the side of the semi-cylindrical stop projection 24 .

On the other hand, a rectangular resin cover 30 covering the frame board 10
The main wall 32, the end wall 34, and the opposing side wall 3
6 and 36 as main parts, and the side wall 36 projects beyond the main wall 32. Inside the protruding part 38,
A semi-cylindrical locking protrusion 40 similar to the semi-cylindrical guide protrusion 16 that engages with the guide groove 20 is provided protrudingly, and an opening 42 that engages with the semi-cylindrical locking protrusion 28 is formed in the end wall 34. (See Figures 3 and 4).

The frame plate 10 and cover 30 are constructed as described above, and in order to attach the cover 30 to the frame plate 10, both 10 and 30 must be in the postures shown in FIGS. 1 and 3. , the cover is brought over the frame plate 10, and the semi-cylindrical locking protrusion 40 is applied from above to the semi-cylindrical guide protrusions 16, 16 and pressed down strongly, so that the semi-cylindrical locking protrusion 40 is removed together with the protrusion 38. 4
0 is once expanded, the semi-cylindrical locking protrusion 40 is engaged with the guide grooves 20, 20 (see Fig. 4),
Thereafter, the cover 30 is moved to the left, and when the semi-cylindrical locking protrusion 40 comes into contact with the small protrusion 22, the cover 30 is further pushed. As a result, the semi-cylindrical locking protrusion 40 forms the small protrusions 22, 2 in the guide grooves 20, 20.
2, and at the same time, the semi-cylindrical locking projection 28 enters into the opening 42 and strongly engages the lower side 76 thereof. In this state, the cover 30 is stably fixed to the frame board 10.

When using the operation panel, pull the cover 30 strongly to disengage the small protrusion 22 and the semi-cylindrical locking protrusion 40 and the connection between the semi-cylindrical locking protrusion 28 and the opening 42, and then open the guide groove. 20 until it abuts against the stop projection 24.

To remove the cover 30 from the frame plate 10, firmly lift the cover 30 at any position of the semi-cylindrical stop protrusion 24 or the semi-cylindrical guide protrusion 16,
Alternatively, it is sufficient to press and expand the semi-cylindrical locking protrusion 40.
The cover 30 expands at one end along with the protrusion 38 and passes over the semi-cylindrical guide protrusion 16 or the semi-cylindrical stop protrusion 24, and the cover 30 is removed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a frame plate according to an embodiment of the present invention, Fig. 2 is a view taken along the - line, Fig. 3 is a perspective view of a cover that covers the frame plate, and Fig. 4 is a frame plate cover. FIG. Explanation of symbols, 10...Frame board, 12...Small window, 1
4... tongue piece, 16... semi-cylindrical guide protrusion, 18...
...Brim, 22...Small projection, 24...Semi-cylindrical stop projection, 26...End wall, 28...Semi-cylindrical projection, 30
... Cover, 32 ... Main wall, 34 ... End wall, 36
... side wall, 38 ... protrusion, 40 ... semi-cylindrical projection, 42 ... opening, 44 ... lower side.

Claims (1)

[Scope of utility model registration request] In a cover mounting structure in which a cover is removably attached to a frame plate of an electronic equipment operation panel, two side end face portions of the frame plate are formed parallel to each other, and the two side end face portions have a A substantially semi-cylindrical guide protrusion is integrally protruded, and a small protrusion is formed near one end of the guide protrusion closer to the base of the frame plate than the guide protrusion, and can cover the frame plate. One end wall of the cover of shape and dimensions is missing;
A substantially semi-cylindrical protrusion is integrally provided on the inner surface of the two end surfaces of the cover near the cutout end wall, and the semi-cylindrical protrusion of the cover is engaged with the guide protrusion of the frame plate. Approaching the small protrusion from the longitudinal center of the frame plate and climbing over it, the frame plate portion and the cover portion on the opposite side from the small protrusion of the frame plate and the cover protrusion are connected to each other. An operation panel cover mounting structure for an electronic device, characterized in that a locking means that can be freely locked and detached is provided.