JPH0542223Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a magnetic catch that is attached to, for example, a hinged door of a cabinet and is used to reliably hold the hinged door in a closed state by magnetic force.

(Prior art) The magnetic catch is shown in Figures 12 and 13.
As shown in the figure, there is a case in which a pair of yokes 1 sandwich a magnet 2 in the thickness direction, and the yoke 1 and the magnet 2 are housed in a case 3 made of synthetic resin. As shown in the figure, the magnetic catch is provided with a pair of engaging convex portions 4 on the case 3, and a locking concave portion 5 on each yoke 1, respectively.
By providing a locking concave portion 5 and engaging the engaging convex portion 4, the yoke 1 and the magnet 2 engage with the engaging convex portion 4.
The yoke 1 and the magnet 2 are locked so as not to come off from the front end opening 6 of the case 3. The reason why the yoke 1 and the magnet 2 are made to be able to swing back and forth is so that they can be swung to fit the inclination of the other side to be attracted, so that the other side can be reliably and well attracted.

(Problem to be solved by the invention) However, in the past, the yoke 1 was simply locked to the case 3 by the engaging protrusion 4;
Therefore, the stress from the yoke 1 is concentrated on the engagement protrusion 4, and the engagement protrusion 4 is gradually damaged during use. As a result, there is a risk that the yoke 1 and the magnet 2 may be accidentally removed from the front end opening 6 of the case 3 after a short period of use.

In view of the above problems, the present invention is designed to prevent the yoke and magnet from accidentally coming off the case even after long-term use.

(Means for solving the problem) The technical means of the present invention for solving this technical problem includes a case 11 having an open front end and having a pair of long side walls 13 and a pair of short side walls 14 facing each other. It also includes a magnet 30 and a pair of yokes 31 that sandwich the magnet 30 in the thickness direction. the yoke 31 so as to protrude forward from the yoke 31;
and magnet 30 are housed in case 11, case 1
Engagement convex portions 26 are provided at the center portions of the inner surfaces of the long side walls 13 of 1, respectively.
In the magnetic catch provided at the center of each yoke 31, a locking recess 33 with which the engaging protrusion 26 engages is provided so that the yoke 31 swings back and forth about the engaging protrusion 26. , at both ends of the yoke 31 facing the short side wall 14,
A locking groove 34 is provided and is engaged with the locking groove 34 of the yoke 31 so as to restrict the yoke 31 from being removed from the front end opening 15 of the case 11 within a range that allows the yoke 31 to swing back and forth. An elastically deformable engaging tongue 35 is provided on the short side wall 14 of the case 11 to project inward.

(Function) When the yoke 31 and the magnet 30 are inserted into the case 11 from the front end opening 15 with the magnet 30 held between the yoke 31 and the yoke 31 along the inner surface of the long side wall 13, the locking recess of the yoke 31 is inserted. 33
At the same time, the engaging tongue piece 35 engages with the locking groove 34 of the yoke 31 as shown in FIG. Therefore, the yoke 31 is locked to the case 11 not only by the engagement protrusion 26 but also by the engagement tongue 35 so as not to come off from the front end opening 15. There is no stress concentration, and the stress of the yoke 31 is also dispersed to the engaging tongue piece 35, so that damage to the engaging convex portion 26 is effectively prevented. In addition, since the engaging tongue piece 35 is elastically deformable, when the yoke 31 swings back and forth about the engaging convex portion 26, the engaging tongue piece 35 is elastically deformed in the front-back direction in response to this. However, the engaging tongue piece 35 does not make it impossible for the yoke 31 to swing back and forth.

(Embodiment) The present invention will be explained below according to the illustrated embodiment. In the figure, 11 is a case made of synthetic resin such as polypropylene, etc., and a rear wall 12 and a pair of long side walls 13 facing each other are connected to the case 11. short side wall 14 of
It is formed into a box shape with an opening 15 at the front end. A rear end opening 16 is provided in the rear wall 12 of the case 11, and a pair of elastic receiving pieces 17 are provided so as to protrude so as to close the opening 16.

Reference numerals 21 and 22 are mounting pieces that protrude integrally from the case 11 and have mounting holes 23 and 24.
1 and 22, the case 11 can be attached to a part to be attached, such as a hinged door, using screws or the like.

Reference numeral 26 designates engaging convex portions 26, which are provided in a protruding manner at the center portions of the inner surfaces of the long side walls 13, respectively. An inclined surface 27 is formed on the front side of each engagement convex portion 26 so as to gradually become larger inward from the inner surface of the long side wall 13.

30 is a rectangular parallelepiped magnet, and 31 is a pair of rectangular plate-shaped yokes. These yokes 31 and magnets 30 are housed in and out of the case 11 from the front end opening 15 of the case 11 with the magnet 30 sandwiched between the yokes 31 in the thickness direction.
are along the inner surface of the long side wall 13 of the case 11, and the front end of the yoke 31 projects forward from the front end opening 15 of the case 11.

Reference numeral 33 denotes a locking recess provided in the yoke 31, and the engaging projections 26 of the case 11 are respectively engaged with the locking recess 33, so that the yoke 31 is rotated with respect to the case 11 using the engaging projection 26 as a fulcrum. It is locked so that it can swing back and forth.

Reference numeral 34 denotes a locking groove portion provided in the yoke 31, which is formed with a U-shaped notch at both ends of each yoke 31 facing the short side wall 14. Reference numeral 35 denotes an engaging tongue piece provided on the short side wall 14, which protrudes inward from the inner surface of the short side wall 14 so as to gradually increase inwardly in the left-right direction toward the rear. This engagement tongue piece 35 is elastically deformable and is detachably engaged with the engagement groove 34 of the yoke 31, thereby allowing the case 1 of the yoke 31 to move within the range that allows the yoke 31 to swing back and forth.
1 from being removed from the front end opening 15.

(Effect of the invention) According to the invention, the locking grooves 34 are provided at both ends of the yoke 31 facing the short side walls 14, and the yoke
An elastically deformable engagement tongue piece 35 that engages with the locking groove 34 of the yoke 31 prevents the case 11 from being removed from the front end opening 15 of the case 11.
Since the short side wall 14 of the yoke 31 is provided to protrude inwardly, the stress from the yoke 31 is not concentrated on the engagement protrusion 26, and the stress of the yoke 31 is also dispersed to the engagement tongue 35. , the engagement protrusion 26 can be effectively prevented from being damaged, and even if the engagement protrusion 26 is slightly damaged, the engagement tongue 35 can prevent the case 1 of the yoke 31 from being damaged.
Since the yoke 31 and the magnet 30 can be prevented from being removed from the case 11 even after long-term use, the yoke 31 and the magnet 30 will not be accidentally removed from the case 11. Moreover, since the engaging tongue piece 35 allows the yoke 31 to swing back and forth through its elastic deformation, the yoke 31 swings back and forth as before, making the yoke 31 and the magnet 30 flexible relative to the other side of attraction. It is possible to reliably and effectively suction the other party by fitting the device, and its practical effects are significant.

[Brief explanation of the drawing]

1 to 11 show an embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a half-bottom sectional view, FIG. 3 is a side view, FIG. 4 is a rear view, and FIG. The figure is a front view of the case, Fig. 6 is a bottom view, Fig. 7 is a side view, Fig. 8 is a rear view, Fig. 9 is a plan view of the yoke, Fig. 10 is a front view, and Fig. 11 is a plan view of the yoke. The figure is a side view of the same. FIG. 12 is a front view showing a conventional example, and FIG. 13 is a half-bottom sectional view of the same. DESCRIPTION OF SYMBOLS 11... Case, 13... Long side wall, 14... Short side wall, 15... Front end opening, 26... Engaging convex part, 3
0... Magnet, 31... Yoke, 33... Engaging recess, 34... Locking groove, 35... Engaging tongue piece.

Claims (1)

[Claims for Utility Model Registration] A case 11 with an open front end having a pair of long side walls 13 and a pair of short side walls 14 facing each other, a magnet 30 and a pair of yokes that sandwich the magnet 30 in the thickness direction. 31 and yoke 3
The yoke 31 and the magnet 30 are housed in the case 11 so that the yoke 31 and the magnet 30 are housed in the case 11 so that the yoke 31 and the magnet 30 are arranged along the inner surface of each long side wall 13 of the case 11 and the front end of the yoke 31 projects forward from the front end opening 15 of the case 11.
An engaging convex portion 26 is provided at the center of the inner surface of each long side wall 13, and a locking concave portion 33 is engaged with the engaging convex portion 26 so that the yoke 31 swings back and forth about the engaging convex portion 26 as a fulcrum. However, in the magnetic catch provided at the center of each yoke 31, on both ends opposite the short side wall 14 of the yoke 31,
A locking groove 34 is provided and is engaged with the locking groove 34 of the yoke 31 so as to restrict the yoke 31 from being removed from the front end opening 15 of the case 11 within a range that allows the yoke 31 to swing back and forth. A magnetic catch characterized in that an elastically deformable engaging tongue piece 35 is provided to protrude inwardly from the short side wall 14 of the case 11.