JPH11112165A - Structure of attaching case to device frame body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To retain a case in engagement to a device frame body in such a state that the case is not detached from the frame even when a strong force is applied to the case. SOLUTION: An engaging structure is provided with a device frame 2 having side walls 3a and 3b facing each other, and a case 7 with side plates 8a and 8b facing each other and is constituted to engage the case 7 to the frame 2 by providing engaging sections 9a and 9b having engaging holes 10a and 10b to the case 7, and engaging sections 4a and 4b having engaging projections 5a and 5b to the frame 2 and, at the same time, stopper projections 6a and 6b to the side walls 3a and 3b. In addition, slopes 11a and 11b which become higher as going toward the outsides form the insides are provided to the front end sections of the side plates 8a and 8b of the case 7, and slopes 12a and 12b which are engaged with the slopes 11a and 11b of the case 7 are provided to the stopper projections 6a and 6b of the frame 2 faced oppositely to the slopes 11a and 11b of the case 7. Therefore, the case 7 is not detached from the frame 2 even when the flat surface section of the case 7 is pushed, because the case 7 is not opened due to the slopes 11a and 11b of the case 7 which come into collision with the slopes of the frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for attaching an elastic case to a device frame such as a control device.

[0002]

2. Description of the Related Art A conventional structure for mounting a device frame and a case is as follows.
It is as shown in FIG. 3 and FIG. In the figure,
Reference numeral 1 denotes a control device, and 2 denotes a device frame composed of a heat sink and the like, and the internal structure is omitted for easy understanding of the invention. Reference numerals 3a and 3b denote side walls provided on the device frame 2 so as to face each other via a gap, and reference numerals 4a and 4b denote engagement portions provided on the side walls 3a and 3b.
Is provided. Further, the stoppers 6a, 6b are provided on the engaging portions 4a, 4b at intervals from the engaging protrusions 5a, 5b.
b is provided. Reference numeral 7 denotes a case having a substantially U-shaped cross section having elasticity. Engaging portions 9a and 9b are provided on side plates 8a and 8b provided so as to face each other with a gap therebetween.
a, 9b are provided with engaging holes 10a, 10b. In such a configuration, when the case 7 is attached to the device frame 2, the engaging portions 9 a and 9 b of the case 7 are attached to the device frame 2.
Of the device frame 2, and the engagement protrusions 5a and 5b of the device frame 2 are inserted into the engagement portions 4a and 4b.
This is performed by engaging the engaging holes 10a and 10b of the case 7. The case 7 includes the engagement holes 10a and 10b.
Are engaged with the engagement projections 5a and 5b of the device frame 2, and the distal ends of the engagement portions 9a and 9b of the case 7 abut against the stopper projections 6a and 6b of the device frame 2. Reference numeral 7 is attached to the device frame 2 at a predetermined position with high accuracy.

[0003]

However, in the prior art, since the case 7 is engaged only with the apparatus frame 2 in the vertical direction, the flat portion of the case 7 is strongly pressed as shown by the arrow A. When the flat portion warps in an arc shape, the engaging portion 10
b and 10b spread in the horizontal direction as shown by the arrow B, so that there was a problem that the engagement between the case 7 and the device frame 2 was disengaged. Accordingly, an object of the present invention is to provide an attachment structure between an apparatus frame and a case, in which the case 7 and the apparatus frame 2 are not disengaged regardless of what force is applied to the case 7. It is.

[0004]

In order to solve the above-mentioned problems, the present invention provides an apparatus frame having side walls opposed to each other via a gap, and a side plate having elasticity and opposed to each other via the gap. A case having an engaging portion having an engaging hole, the device frame body being provided with an engaging portion having an engaging projection for engaging with the engaging hole of the case, In a mounting structure of a device frame and a case, wherein a stopper projection is provided on a side wall and which is opposed to a tip portion of a side plate of the case, and the case is mounted on the device frame.
An inclined portion that rises from the inside to the outside is provided at the tip of the side plate of the case, and the inclined portion of the case is engaged with a stopper protrusion of the device frame body facing the inclined portion of the case. An inclined portion is provided.
Therefore, even if the flat portion of the case is pressed, the inclined portion of the case does not open by hitting the inclined portion of the device frame, so that the case does not come off the device frame.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a front sectional view of a control device according to an embodiment of the present invention, and FIG. 2 shows a state where a case is attached to an apparatus frame. 3 and 4
The same reference numerals denote the same or corresponding elements, and a description thereof will not be repeated. Although the basic structure of the control device of the present invention is the same as that of the conventional control device, the control device of the present invention
At the distal ends of the engaging portions 9a and 9b, inclined portions 11a and 11b that rise from the inside to the outside are provided, and the device frame 2 facing the distal ends of the engaging portions 11a and 11b of the case 7 is provided. Stopper projections 6 of the engaging portions 4a, 4b
a, 6b are provided with inclined portions 12a, 12b which engage with the inclined portions 11a, 11b of the engaging portions 9a, 9b of the case 7. Therefore, as shown in FIG. 2, the engagement holes 10a and 10b of the engagement portions 9a and 9b of the case 7 engage with the engagement protrusions 5a and 5b of the engagement portions 4a and 4b of the device frame 2 at the same time. The inclined portions 11a and 11b of the case 7
It engages with the inclined portions 12a and 12b of the device frame 2. As a result, the case 7 engages not only in the vertical direction but also in the lateral direction with respect to the device frame 2, and even when the flat portion of the case 7 is pressed and bowed in a bow shape, the case 7 is engaged. Joint 9
a, 9b does not spread in the horizontal direction, and the engagement between the case 7 and the device frame 2 does not come off. In addition, the present invention
You can also do the following: (1) When the engaging portions 9a and 9b are provided on the side plates 8a and 8b of the case 7, if slits (not shown) are formed on both sides of the engaging portions 9a and 9b, the engaging portions 9a and 9b are connected to the side plates 8a and 8b.
b and can move independently of the case 7 and the device frame 2
Can be easily engaged. (2) The stopper projections 6a, 6b of the device frame 2 do not necessarily need to be provided on the engagement portions 4a, 4b, and the side walls 3a, 3b
And the inclined portion 11a of the case 7,
11b does not necessarily need to be provided on the engaging portions 9a and 9b, but may be formed on the side plates 8a and 8b. (3) The case 7 does not necessarily have to have a substantially U-shaped cross section having a flat portion, but may have elasticity and have side plates facing each other via a gap.

[0006]

As described above, according to the present invention, according to the present invention, the case 7 is provided with the inclined portion 11 which becomes higher from the inside to the outside.
a, 11b, and the device frame 2 is provided with an inclined portion 12 which engages with the inclined portions 11a, 11b of the case 7.
Since a and 12b are provided, the inclined portions 11a and 11b of the case 7 engage with the inclined portions 12a and 12b of the device frame 2 and do not open even if the flat portion of the case 7 is pressed.
The case 7 does not come off the device frame 2.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a control device according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing a state in which the case in FIG. 1 is engaged with an apparatus frame.

FIG. 3 is a front sectional view showing a control device according to a conventional technique.

FIG. 4 is a front sectional view showing a state in which the case in FIG. 3 is engaged with an apparatus frame.

[Explanation of symbols]

 Reference Signs List 1 control device, 2 device frame, 3a side wall, 3b side wall, 4a engaging portion, 4b engaging portion, 5a engaging protrusion, 5b engaging protrusion, 6a stopper protrusion, 6b stopper protrusion, 7 case, 8a side plate, 8b Side plate, 9a engaging portion, 9b engaging portion, 10a engaging hole, 10b engaging hole, 11a inclined portion, 11b inclined portion, 12a inclined portion, 12b inclined portion

Claims (1)

[Claims] An apparatus frame having side walls opposed to each other through a gap, and a case having side plates opposed to each other through the gap while having elasticity, wherein the case has an engagement hole. A joining portion is provided, and the device frame body is provided with an engaging portion having an engaging projection that engages with the engaging hole of the case, and the side wall has a stopper projection facing the tip of the side plate of the case. Provided,
In the mounting structure of the device frame and the case, wherein the case is mounted on the device frame, a tip portion of the side plate of the case is provided with an inclined portion that rises from inside to outside, and the inclined portion of the case A mounting structure for an apparatus frame and a case, wherein an inclined portion that engages with an inclined portion of the case is provided on a stopper protrusion of the device frame facing the device frame.