JPH0211810Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a bracket attachment mechanism for fixing an electrical component storage case such as an automobile clock, a vehicle timer, a relay, etc., for example.

BACKGROUND ART Conventionally, a wide variety of brackets have been used to secure cases that house electrical components to a mounting body. For example, the bracket 1 shown in FIG. 1 is a plug-in type bracket, and has a fitting part 2 formed in a storage case 2 for storing electrical components, etc.
The storage case 2 is fixed to the mounting part main body (not shown) by fitting the insertion part 1a of the bracket 1 into the mounting part a and screwing the bracket 1 onto the mounting part main body (not shown) with a set screw 3. The insertion portion 1a has a length l,
It is a rectangular protruding piece with a width A, and the length l, which is the entire length of the insertion part 1a, matches the depth of the fitting part 2a of the storage case 2. That is, in order to securely fix the bracket 1 to the storage case 2, the length 1 of the fitting portion 1a of the fitting portion is made long, and the bracket 1 is press-fitted without any movement, so that the bracket 1 can be firmly fixed. Therefore, in order to securely fix the bracket 1 to the storage case 2a, the width A of the insertion part 1a should be made slightly wider than the inner width of the fitting part 2a, and the bracket should be press-fitted. 1 cannot be easily press-fitted into the fitting portion 2a, and the fitting portion 2a may be deformed and damaged. and,
By making the width A of the insertion portion 1a narrower than the inside of the fitting portion 2a, the insertion portion 1a of the bracket 1 can be easily inserted into the fitting portion, but there is a problem in that it moves loosely. In addition, the storage case 2 for electrical components in an automobile may be damaged due to vibration and temperature.
There is a problem that a is deformed and the bracket 1 moves freely.

Further, as a means for press-fitting a metal piece into the box body and tightly fixing the metal piece, for example,
Press-fit protrusion and isosceles 3 disclosed in Publication No. 78754
There are terminals with square protrusions. The terminal has a sharp press-fit protrusion or an isosceles triangular protrusion protruding from the side surface of the portion of the box-shaped terminal plate to be press-fitted and fixed to the reception groove, and is firmly fixed by being press-fitted. However, the sharp press-fit protrusion or isosceles triangular protrusion cuts the side surface of the receiving groove when the terminal is press-fit into the box-shaped terminal plate. In particular, when a terminal with isosceles triangular protrusions arranged in a serrated manner is press-fitted into a box-shaped terminal board, first the isosceles triangular protrusions on the lower lead part side cut the sides of the receiving groove, and then 2 on the upper lead side
The equilateral triangular protrusion is press-fitted while cutting the receiving groove. The receiving groove of the box-shaped terminal board is also cut when the terminal is pulled out and removed from the receiving groove. Therefore, when the terminal is pulled out and the terminal is press-fitted again, there is a problem that the inner width of the receiving groove increases and the fixing force due to the isosceles triangular protrusion decreases.

Purpose of the Present Invention The bracket attachment mechanism according to the present invention was devised to solve the above-mentioned problems, and includes a first approximately small semicircular portion on the tip side of the insertion portion of the bracket.
A second anti-slopping protrusion is formed at a position spaced apart from the first anti-slopping protrusion and has a substantially small semicircular shape and has a larger diameter than the first anti-slopping protrusion at the insertion portion of the bracket. By this,
The purpose is to tightly secure the bracket to the storage case.

Structure of the present invention Hereinafter, the mounting mechanism of the bracket according to the present invention will be described in detail based on FIGS. 2 and 3.

Reference numeral 4 denotes a storage case made of resin for storing electrical parts such as an automobile clock, a vehicle timer, and a relay, and has a fitting portion 4a into which an insertion portion 5a of a bracket 5 is fitted. The fitting part 4a is
The side surface is composed of two L-shaped projecting pieces, and forms a pressing protrusion 4b for preventing vertical movement of the bracket 5 that is press-fitted into the tip. The height from the top surface of the storage case 4 to the pressing protrusion 4b is as follows:
It is lower than the thickness of the bracket 5 made of a metal plate.
4c is a cross-shaped detachment prevention convex portion, and has an inclined portion 4d in the press-fitting direction. The bracket 5 is a mounting member for fixing the storage case 4 to the mounting part main body (not shown), and is a mounting member for fixing the storage case 4 to the fitting part 4a of the storage case 4.
An insertion portion 5a that fits into the mounting portion body, and a screw hole 5b into which a set screw 6 for screwing into the attachment portion body is inserted are formed. The insertion part 5a has a slope 5c at the tip, a movement prevention groove 5d in the center that fits into the detachment prevention convex part 4c, and a substantially small semicircular first movement part in pressure contact with the inner wall of the fitting part 4a of the bracket 4 on the side surface. Prevention protrusions 5e, 5f,
Second anti-slopping protrusions 5g, 5h having a diameter larger than the first anti-slopping protrusions 5e, 5f and having a substantially small semicircular shape are provided in a protruding manner. The insertion portion 5a has both corner portions of the distal end formed in an arc shape. The first anti-sway protrusions 5e, 5f are
The second anti-slopping protrusions 5g and 5h are spaced apart from each other and protrude from the tip end side of the insertion portion 5a, and the distance B between the tips of the first anti-slopping protrusions 5e and 5f is equal to the second anti-slopping protrusion 5g. , 5h is set to be slightly narrower than the distance C between the tips. First anti-slopping protrusion 5e,
5f and the second anti-sway protrusions 5g, 5h are approximately small semicircular protrusions, and the intervals B and C between the first and second anti-sway protrusions 5e, 5f and 5g, 5h are as follows:
It is set slightly wider than the inner width D between the fitting parts 4a. Reference numeral 5i denotes a rib pressed into a corner of the inner wall of the L-shaped bracket 5.

Effect of the present invention The insertion portion 5a of the bracket 5 is press-fitted into the fitting portion 4a of the storage case 4. The tip of the insertion part 5a is
Both corners extend in an arc shape, and the upper and lower surfaces form an inclination 5c. Then, the insertion portion 5a can be easily press-fitted into the fitting portion 4a. The height between the top surface of the storage case 4 and the pressing convex portion 4b is slightly lower than the thickness of the plate-shaped bracket 5, and when the insertion portion 5a of the bracket 5 is press-fitted into the fitting portion 4a, the insertion portion 5a is stored. It comes into pressure contact with the upper surface of the case 4 and the pressing convex portion 4b, and is in a sandwiched state. Therefore, the bracket 5 is prevented from freely moving in the vertical direction. The distance B between the tips of the first anti-slopping protrusions 5e and 5f is set to be slightly wider than the inner width D between the fitting portions 4a. The first anti-sway protrusions 5e, 5f are connected to the fitting portion 4.
It is press-fitted by pushing out the inner wall surface of a. The distance C between the tips of the second anti-sway protrusions 5g and 5h is the distance B between the tips of the first anti-sway protrusions 5e and 5f.
Since it is set slightly wider, the insertion portion 5a is press-fitted by further pushing the inner wall surface of the fitting portion 4a. Since the first anti-slopping protrusions 5e, 5f and the second anti-slopping protrusions 5g, 5h come into pressure contact with the inner wall surface of the fitting portion 4a, lateral movement is completely prevented. The first anti-slopping protrusions 5e, 5f and the second anti-slopping protrusions 5g, 5h are substantially semicircular protrusions, so when the insertion portion 5a is press-fitted into the inner wall surface of the fitting portion 4a, the fitting is press-contacted. It can be press-fitted without cutting the inner wall surface of the portion 4a. When the entire projection-shaped insertion portion 5a is press-fitted into the fitting portion 4a, the anti-slopping hole 5d formed in the center of the insertion portion 5a fits into the detachment prevention protrusion 4c, so that the bracket 5 is It is further firmly fixed to the storage case 4. Since the cross-shaped detachment prevention convex portion 4c has an inclined portion 4d in the press-fitting direction, it can be smoothly fitted into the drift prevention hole 5d. Further, since the L-shaped bracket 5 is reinforced by pressing ribs 5i on the bent portion, it is not easily deformed, and the storage case 4 can be firmly fixed to the mounting body. The insertion portion 5a of the bracket 5 can be press-fitted from either the front or rear of the fitting portion 4a. Further, the detachment prevention convex portion 4c and the movement prevention hole 5d are not limited to the cross-shaped shape,
For example, it may be circular or angular.

In addition, the bracket mounting mechanism according to the present invention was found to be stable even after an 80° temperature test and a JISD1601 automobile parts vibration test.
is firmly fixed to the storage case 4 without any movement.

Effects of the Present Invention The bracket mounting mechanism according to the present invention includes a first anti-slopping protrusion formed in a substantially small semicircular shape on the distal end side of the insertion portion of the bracket, and a first anti-slopping protrusion at a position spaced apart from the first anti-slopping protrusion. At the same time, a second anti-slip projection having a diameter larger than that of the first anti-slip projection is formed on the insertion portion of the bracket, so that the insertion portion becomes approximately wedge-shaped. can be firmly crimped onto the mating part. By forming a movement prevention hole in the center of the insertion portion of the bracket and fitting it into the separation prevention convex portion of the storage case, lateral movement of the bracket can be suppressed. In addition, by forming a pressing protrusion at the tip of the fitting part protruding from the storage case, the insertion surface of the bracket to be press-fitted is held between the storage case and the pressing protrusion, thereby preventing vertical movement. suppress.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a conventional bracket. 2 and 3 are drawings showing a bracket attachment mechanism according to the present invention, with FIG. 2 being an exploded perspective view and FIG. 3 being an enlarged plan view. 1, 5... Bracket, 1a, 5a... Insertion part, 2, 4... Storage case, 2a, 4a... Fitting part, 4b... Pressing convex part, 4c... Separation prevention convex part,
4d... Slope portion, 5c... Slope, 5d... Anti-slopping hole, 5e, 5f, 5g, 5g... Anti-swivel projection, 5i... Rib.

Claims (1)

[Scope of utility model registration request] A plug-in bracket for fixing an electrical component storage case to a mounting part main body includes a first anti-slopping protrusion having a substantially small semicircular shape on the distal end side of the insertion part of the bracket, and a first anti-slopping protrusion spaced apart from the first anti-slopping protrusion. a second approximately small semicircular shape having a diameter larger than that of the first anti-slopping protrusion;
A bracket mounting mechanism characterized by forming a protrusion to prevent movement.