JP6638017B2 - magnet catch - Google Patents

Description

  The present invention relates to a magnet catch used for the purpose of, for example, holding a door that opens and closes an opening of a housing in a closed state by magnetic force.

  Conventionally, a magnet catch described in Patent Document 1 has been known. This magnet catch is one in which a permanent magnet is provided inside a housing case, and the case has a pair of arm portions on left and right side surfaces facing each other in the lateral direction. The pair of arms are vertically spaced apart from each other, extend upward, the base end of the lower end is connected to the left and right side surfaces, and the distal end of the upper end is separated from the left and right side surfaces to the outside in the horizontal direction, It is elastically deformable in the lateral direction. A plurality of step surfaces are formed on the outer surface of the tip portion of the arm portion to cope with various mounting objects having different plate thicknesses. Spacers are formed between the pair of arms on the left and right sides of the case. The spacer portion is for filling the gap between the inner edge of the mounting hole formed in the mounting object and securely holding the magnet catch to the mounting object, and extends upward on the left and right side surfaces in a convex shape, and in the lower portion. It is continuous with the base end of the arm and extends upward between the arms at the top. The lateral top or outer surface of the spacer portion is located inside the outer edge of the arm portion.

JP 2014-181457 A

In the above-mentioned conventional magnet catch, the arm portion is provided in a narrow vertical space on the side surface of the case so as to be spaced apart from each other, so that the arm portion is thin and the lower base portion is connected to the side surface of the case. In addition, there is a problem that the resilience in the left-right direction is weak, and it is easy to slip out of the mounting hole of the mounting object over time. In addition, a plurality of step surfaces corresponding to a plurality of objects with different plate thicknesses are formed on the outer surface of the tip of the arm, but there is no guarantee that the plate thickness always corresponds to the height of the step surface. Otherwise, play will occur.
Therefore, the present invention provides a magnet catch which always corresponds to a plurality of objects having different plate thicknesses in a stepless manner, has a large left-right resilience of the arm portion, and is hard to slip out of the mounting hole of the mounting object even with aging. That is the task.

Hereinafter, the present invention will be described with reference to the reference numerals in the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above-mentioned problem, in a magnet catch 1 of the present invention, a case 2 in which a permanent magnet 3 is housed includes left and right side walls 4 and 5 in a horizontal direction X, front and rear side walls 6 and 7 in a vertical direction Y, and a height. A pair of arms that are continuous with the upper and lower side walls 8 and 9 in the direction Z and the lower ends of the left and right side walls 4 and 5 at the same front and rear widths, respectively, are bent outward in a substantially U shape, and extend upward in the height direction Z. Parts 10 and 11 are provided. The arm portions 10 and 11 have distal ends, which are upper ends, separated from the left and right side walls 4 and 5 outward in the lateral direction X, and are elastically deformable in the lateral direction. Inward ends of the arm portions 10 and 11 are formed with inwardly inclined slopes 10a and 11a on the outer surface in the lateral direction X. The case 2 includes a flange portion 8a in which the upper side wall 8 extends outwardly of the front and rear left and right side walls 4, 5, 6, and 7. On the lower surface of the flange portion 8a extending to the left and right side walls 4 and 5, a spacer ridge 8b extending at right angles from the left and right side walls 4 and 5 is formed. The outer end in the lateral direction X of the spacer ridge 8b is located inside the lateral outer edges of the arms 10 and 11.

  In the magnet catch 1 of the present invention, the arm portions 10 and 11 are continuous with the lower ends of the left and right side walls with the same front-rear width, and are curved outward in a substantially U-shape and extend upward. , With great resilience. Therefore, the magnet catch 1 does not easily fall out of the mounting hole 21a of the mounting target 21 even with aging, and is securely fixed to the mounting target 21.

It is a perspective view of a magnet catch concerning the present invention. It is a front view of the magnet catch of FIG. It is a side view of the magnet catch of FIG. It is a bottom view of the magnet catch of FIG. FIG. 5 is a schematic sectional view taken along line VV in FIG. 1. FIG. 2 is an explanatory diagram showing a mounting state of the magnet catch of FIG. 1.

An embodiment of the present invention will be described with reference to the drawings.
The magnet catch 1 has a permanent magnet 3 inside a housing case 2 having a horizontal direction X, a vertical direction Y, and a height direction Z orthogonal to each other.

  The case 2 is made of synthetic resin, and has left and right side walls 4 and 5 facing each other in parallel in the horizontal direction X, front and rear side walls 6 and 7 facing each other in parallel in the vertical direction Y, and faces parallel to each other in the height direction Z. Arms 10 and 11 are provided at the lower ends of the upper and lower side walls 8 and 9 and the left and right side walls 4 and 5 at the same front and rear widths, each of which is bent outward in a substantially U-shape and extends upward.

  The arms 10 and 11 are curved in a substantially U-shape at the lower ends and extend upward and incline outward, and the distal ends, which are the upper ends, are separated outward from the left or right side walls, respectively. The arms 10 and 11 are elastically deformable in the lateral direction X. At the tip of the arm portion, inwardly inclined slopes 10a and 11a are formed on the outer surface in the lateral direction X.

  The case 2 includes a flange portion 8a in which the upper side wall 8 extends outwardly of the left and right front and rear side walls 4, 5, 6, and 7. On the lower surface of the flange portion 8a extending to the left and right side walls 4 and 5, a spacer ridge 8b extending at right angles from the left and right side walls 4 and 5 is formed. The outer end of the spacer protrusion 8b in the lateral direction X is located inside the outer end of the pair of arms 10 and 11 in the lateral direction X.

  As shown in FIG. 6, the magnet catch 1 is used by being inserted and fixed into a mounting hole 21a formed in a mounting object 21 such as a door of a housing. The shape of the mounting hole 21 a is formed in a substantially rectangular shape having a slightly smaller area than the upper plate 8.

  When attaching the magnet catch 1 to the mounting hole 21a, the arms 10 and 11 are pressed into the mounting hole 21a. At this time, the arms 10 and 11 are elastically deformed inward, so that the magnet catch 1 can be inserted into the mounting hole 21a.

When the flange portion 8a of the case 2 comes into contact with the upper surface of the mounting object 21, the arm portions 10 and 11 are restored, and the lower corners of the inner edges of the mounting holes 21a engage the slopes 10a and 11a. Even if the thickness of the mounting object 21 is variously different, the inner edge of the mounting hole 21a is engaged with the stepless slopes 10a, 11a without play, and is held between the slopes 10a, 11a and the lower surface of the flange portion 8a. You.
Some conventional magnet catches have a plurality of step surfaces corresponding to a plurality of objects having different plate thicknesses formed on an outer surface of a distal end portion of an arm portion. This means that there is no guarantee that the plate thickness always corresponds to the height of the step surface.

  On the other hand, in the magnet catch 1 of the present embodiment, since the inner edge of the mounting hole 21a is engaged with the stepless slopes 10a, 11a, there is no problem of the backlash. Requires a relatively large elastic restoring force that can oppose the stiffener. In order to obtain this elastic force, the arms 10 and 11 have a relatively large cross-sectional area and a relatively large curved structure below.

  When the tolerance between the magnet catch 1 and the mounting hole 21a is set to be large, a gap may be formed between the front and rear side walls 6, 7 of the case 2 and the mounting hole 21a. In this case, the magnet catch 1 receives the pulling-out force with the opening and closing of the door, which is the mounting target 21, and tends to tilt in the front-rear direction, but the slopes 10a, 11a of the arms 10, 11 are formed by the inner edge of the mounting hole 21a. , The inclination of the magnet catch 1 can be suppressed.

  Further, in the present embodiment, the spacer protrusion 8b on the lower surface of the flange portion 8a abuts on the inner edge of the mounting hole 21a in the horizontal direction, so that the lateral displacement of the magnet catch 1 can be suppressed.

DESCRIPTION OF SYMBOLS 1 Magnet catch 2 Case 3 Permanent magnet 4 Left side wall 5 Right side wall 6 Front side wall 7 Rear side wall 8 Upper side wall 8a Flange part 8b Spacer ridge 9 Lower side wall 10 Arm part 10a Slope 11 Arm part 11a Slope 21 Mounting object 21a Mounting hole X Horizontal direction Y Vertical direction Z Height direction

Claims (1)

In a magnet catch in which a permanent magnet is housed inside a housing case having a vertical direction, a horizontal direction, and a height direction orthogonal to each other,
The case includes left and right side walls opposing each other in a horizontal direction, front and rear side walls opposing each other in a vertical direction, upper and lower side walls opposing each other in a height direction, and outer sides continuous with lower ends of the left and right side walls at the same front and rear widths. And a pair of arm portions which are curved in a substantially U-shape and extend upward,
The pair of arms are disposed at the same position as the lower surface of the lower wall at a position where the lower end of the curved portion is laterally outward from the left and right side walls, and the tip side is gradually outward from the left and right side walls in the horizontal direction. It is inclined and separated so that it can be separated and elastically deformable in the lateral direction,
At the tip portions of the pair of arm portions, an inwardly inclined slope is formed on an outer surface in a lateral direction,
The case includes a flange portion in which the upper side wall extends outward from the front, rear, left and right side walls,
The lower surfaces of the flange portions extending to the left and right side walls are provided with spacer protrusions extending at right angles from the left and right side walls, respectively. The lateral outer ends of the spacer protrusions are formed in the lateral direction of the pair of arm portions. The magnet catch, which is located inside the outer edge of the magnet.

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