JPH0249751Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for attaching and fixing a mounting bracket to a case such as an instrument case or a circuit case.

[Prior art and its problems]

Conventionally, a mounting bracket as shown in FIG. 3 has been used to attach a circuit board to a case such as an instrument case or a circuit case.

In the figure, reference numeral 51 denotes a case, and a mounting bracket 52 is fixed to a proper position of the case with screws 53. The mounting bracket 52 is formed by bending, and a circuit board such as a printed wiring board (not shown) is spaced from the surface of the case 51 and is attached and fixed to the mounting bracket 52 with screws. Although one mounting bracket 52 is shown in the figure, normally a plurality of mounting brackets are similarly fixed to the case to mount and secure the circuit board.

In Utility Model Publication No. 46-15015, an engagement hole is provided in the case (the mounting base in the publication), and the corner part of the mounting bracket (the support metal fitting in the publication) is bent and engaged with this engagement hole to prevent rotation. The structure is shown.
In addition, there is also a structure in which a small wall or pin is formed protruding from the case side and comes into contact with the mounting metal to prevent rotation.

However, with these configurations, for example, it is difficult to drill holes when waterproofness is required, and it is difficult to install pins or walls protruding when there are height constraints. The problem is that the height of the screw head to which the mount is attached cannot be lowered any further, making it difficult to design the mounting position of the mount. In addition, since the mounting bracket is fixed inside the case, it is necessary to secure a fixed position for the mounting bracket and the circuit board within the case, making it difficult to use the space inside the case efficiently. .

[Purpose of invention]

The present invention was developed in consideration of the above considerations, and when fixing the mounting bracket to the case, the installation height caused by the thickness of the mounting bracket and the head of the screw that fixes the mounting bracket, and the installation space of the mounting bracket itself. A mounting bracket that can suppress restrictions on the placement position of the mounting bracket due to securing a mounting space for a circuit board, improves the degree of freedom in selecting the installation position of the mounting bracket, and has rotation prevention and positioning functions. It is intended to provide a fixed structure.

[Summary of the invention] In order to achieve the above object, the present invention provides a mounting bracket that is formed by bending a supporting part that supports a circuit board disposed in the case and a fixed part that is fixed to the case. In the mounting bracket fixing structure, the case is divided into an upper case and a lower case, and a recess shaped so that at least two side surfaces of the fixing part come into contact or almost come into contact is provided at the contact point of the upper and lower cases. The fixing portion of the fitting is arranged and fixed within this recess.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a perspective view of the main parts.

In the figure, 1 is the lower case of the instrument case, for example, and the upper case 3 of the instrument case is attached to the flange part 2.
The upper and lower cases 1 and 3 are fixed by screws 5 or the like by abutting the flange portions 4 of the upper and lower cases. A recess 6 is formed at a proper location on the flange portion 2 of the lower case 1, which is the abutment point between the upper case 3 and the lower case 1, and a fixed portion 7A of the mounting bracket 7 is disposed in this recess 6. , and fix it by tightening screw 8. Three or four fittings 7 are similarly arranged on the lower case 1, and the circuit board 9 is attached and fixed to the supporting portions 7B of the plurality of fittings 7 with screws 10. This mounting bracket 7 has a fixed portion 7A and a supporting portion 7B formed by bending.

In addition to the bottom surface, the recess 6 is formed so that two side surfaces are in contact with the side surfaces of the mounting bracket 7, thereby allowing for positioning of the mounting bracket 7 and when tightening and fixing the mounting bracket 7 with the screw 8. It is designed to prevent rotation.

According to the present embodiment described above, the fixed portion of the mounting bracket 7 is fixed at the location where the flanges 4, 2 of the upper and lower cases 3, 1 abut, so the mounting bracket 7 and the screws 8 Mounting bracket 7 to flange part 2, which was impossible in the past because protrusion of the head was not allowed.
This is made possible by providing the recess 6, and since the two sides of the recess 6 are brought into contact with the sides of the mounting bracket 7, rotation prevention and positioning effects can be obtained.

The mounting bracket is bent into an L-shape, and one flat plate part separated by this bend serves as a fixed part to be placed in the recess, and the other flat part serves as a support part to support the circuit board. well, and the concave part is
It is also possible to have a planar shape that substantially follows the flat plate portion of the fixed portion of the mount, and to have the side surface other than the bottom substantially contact the side surface of the attachment portion of the mount, thereby preventing rotation and positioning. When I say "almost in contact" here, I mean that there is a small gap between the side surface of the recess and the side surface of the fixed part of the mounting bracket, and although they are not in direct contact, there is no major wobbling, and there is no rotation prevention or The positioning function is sufficient, and the small gap makes it easy to arrange, and it is possible to absorb slight deviations that tend to occur between the design dimensions and the dimensions after manufacture.

Further, 11 shown in FIG. 2 of the above embodiment is
This is an engagement piece formed protruding from the support portion 7B of the mounting bracket 7, and the engagement piece 11 is engaged with an engagement hole drilled on both sides of the screw hole into which the screw 10 of the circuit board 9 is inserted. , for positioning when attaching the circuit board and the mounting bracket 13.

In addition, the recess does not have to have a planar shape that roughly follows the fixed part of the mounting bracket, but the same effect can be achieved as long as at least two side surfaces of the mounting bracket are in contact with the sides of the recess. That's what you get.

[Effect of idea]

As described above, in the mounting bracket fixing structure for fixing to the case the mounting bracket, which is formed by bending a supporting part that supports a circuit board disposed in the case and a fixing part fixed to the case, The case is divided into an upper case and a lower case, and a recess is formed in the abutment area of the upper and lower cases so that at least two side surfaces of the fixed part abut or almost abut. The mounting bracket fixing structure of the present invention, which is characterized in that the metal fixed part is arranged and fixed, reduces the installation height caused by the mounting bracket and the head of the screw that fixes the mounting bracket to the case. In addition to being able to keep it low,
By using the joint between the upper and lower cases, the fixed part of the mounting bracket can be released from inside the case to save space, giving flexibility in the installation position of the mounting bracket, and at the same time Its practical effects are great, such as providing positioning and rotation prevention effects when fixing to the case.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of one embodiment of the present invention, FIG. 2 is a perspective view of its essential parts, and FIG. 3 is a perspective view of a conventional example. 1... Lower case, 2, 4... Flange section, 3...
...Upper case, 6...Recess, 7...Mounting bracket, 7A...
...Fixed part, 7B...Support part, 8...Screw, 9
...Circuit board.

Claims (1)

[Scope of utility model registration request] In the mounting bracket fixing structure for fixing to the case a mounting bracket that is formed by bending a support part that supports a circuit board disposed in the case and a fixed part that is fixed to the case, the case is fixed to the upper case. a lower case, and a recess shaped such that at least two side surfaces of the fixed part abut or almost abut at the abutment points of the upper and lower cases, and the fixed part of the mounting bracket is disposed within this recess. A mounting bracket fixing structure characterized by being fixed in place.