JPH0624178U - Magnetic holder - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a structure of a magnetic holder (magnet catch) that can be manufactured at low cost without impairing the function even when downsized. [Structure] A container 10 containing a magnet 20 and two magnetic plates 21 sandwiching the magnet 20 has an opening 1 on a peripheral wall 12 thereof.
8 is formed, the tongue arm 11 extends in the opening 18, and the locking protrusion 11a is provided inside the tip of the tongue arm 11. On the other hand, on the bottom surface side, two elastic tongue portions 14 and 15 project from the facing portion of the peripheral wall 12 and intersect and cross the peripheral wall 1 on the opposite side.
Extends to around 2. Stop frames 16 and 17 for limiting the movement of the magnetic plate 21 are provided on the peripheral walls of the elastic tongues 14 and 15 on the tip side.
Is provided. Magnet 20 and magnetic plate 21
Is supported by the elastic tongues 14 and 15 so as to be vertically movable in a state in which the locking hole 21a is engaged with the locking projection 11a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a magnetic retainer (magnetic catch) for retaining a closed state of a cabinet door or the like by magnetic force, and particularly to a technology capable of reducing the size of a high-quality retainer at low cost.

[0002]

[Prior art]

 As a conventional magnetic holder, as shown in FIG. 7 (a), a locking shaft 54 is integrally formed in the accommodating portion 52 of the accommodating member 50 made of synthetic resin, and the leaf spring 6 is accommodated in the accommodating portion 52. In general, 0 and a magnet 58 sandwiched between two magnetic plates 56 are inserted and a cover plate 62 is attached. This kind of magnetic holder has a through hole having an inner diameter larger than the outer diameter of the locking shaft in order to absorb the impact received from the magnetic plate attached to the door and to make a surface alignment with the magnetic plate. 59 and 61 are formed and a leaf spring 60 is provided to elastically attach the magnetic plate 56 and the magnet 58. In this case, instead of the locking shaft, a locking protrusion having a tapered top surface is used, and the portions of the bottom surface of the housing portion that connect to both sides are left as stop surfaces, and the ends of both stop surfaces are near the center. There is also one in which a leaf spring and a cover plate are not required by providing a pair of tongue portions which are extended to the end. On the other hand, a magnetic holder that is more compact than the above holder is required for a door of a small device, and a cylindrical magnetic holder as shown in FIG. 7B is used. In this structure, a magnet 76 sandwiched between magnetic plates 74 is fitted inside a cup-shaped accommodating member 70 having threads 72 on the outer peripheral surface.

[0003]

[Problems to be solved by the device]

 Of the above-mentioned conventional magnetic holders, the magnet is elastically attached in the type shown in FIG. 7 (a), but the magnet is fixed by the insertion pressure in the miniaturized type shown in FIG. 7 (b). There is no locking part. The reason for this is that it is not possible to procure leaf springs and springs with appropriate elasticity at a low price due to downsizing, and the tongue part of the integrally molded part is also limited in size and cannot be set to an appropriate elastic force. In addition, when the locking projection is provided on the inner surface of the peripheral wall of the small diameter cylinder, the elasticity of the peripheral wall required when inserting the magnet and the rigidity of the peripheral wall required to secure the locking force after housing the magnet conflict with each other. Etc. Therefore, the present invention solves the above problems, and an object of the present invention is to provide a structure that can realize elastic attachment and reliable locking of a magnet at low cost, especially in a miniaturized magnetic holder.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the means taken by the present invention is such that an elastic portion for urging the magnetic force generating member in the anti-accommodating direction is integrally molded inside the accommodating member, and the elastic parts are mutually opposed from the substantially opposing peripheral wall side. The structure includes a pair of tongues that project in opposite directions and intersect. Here, it is desirable to provide a stop portion on the lower inside of the peripheral wall facing the tip end side of the tongue portion to limit the movement of the magnetic force generation member in the housing direction. In addition, the tongue arm extending from a part of the peripheral wall around the opening is integrally formed in the opening formed in the peripheral wall of the housing member, and is locked inside the part of the tongue arm that is separated from the base. The section is provided.

[0005]

[Action]

 According to this means, the pair of tongues elastically supports the magnetic force generating member, but since the tongues extend and intersect in the opposite direction, the length of the tongue is increased even when the holder is downsized. You can take it quickly. Here, since the stop portion is formed inside the peripheral wall on the tip end side of the tongue portion, the formation of the stop portion does not hinder the miniaturization of the holder. Also, by forming the tongue arm that extends inside the opening of the peripheral wall, even if the rigidity of the miniaturized housing member is increased, the tongue arm largely bends when the magnet is inserted during assembly, and the magnetic force generating member is inserted with a light force. it can. Moreover, since the tongue arm portion constitutes a part of the peripheral wall, the tongue arm portion, that is, the locking portion is securely fixed after the holding tool is mounted in the wall or the like.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment shows an example of a small cylindrical magnetic holder. FIG. 1 is a partial longitudinal sectional view of this embodiment, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a bottom view. is there. In the present embodiment, a cylindrical container 10 integrally molded of synthetic resin, two magnetic material plates 21 introduced into a housing hole 13 of the container 10 and a magnet 20 sandwiched between the magnetic material plates 21. Consists of.

A locking hole 21 a is formed in the lower portion of the magnetic plate 21, the magnetic plate 21 and the magnet 20 are attracted to each other by magnetic force, and the upper end surface of the magnet 20 is located above the magnetic plate 21. It comes into contact with the flange portion 21b formed on the side surface and is prevented from coming off. An opening 18 shown in FIG. 2 is formed in a part of the peripheral wall 12 of the container 10, and the tongue arm 11 extends downward from the upper part in the opening 18. On the inner surface of the lower end of the tongue arm portion 11 is provided a locking projection 11a whose upper surface is formed into a tapered surface, and is fitted into the locking hole 21a of the introduced magnetic material plate 21. The housing hole 13 of the container 10 has a square cross section, and two elastic tongue portions 14 and 15 project obliquely upward from the peripheral wall 12 at the lowermost portion thereof. As shown in FIG. 4, the planar shapes of the elastic tongue portions 14 and 15 extend in opposite directions from the opposing peripheral wall 12 sides, and their tips reach near the peripheral wall 12 on the opposite side. Further, stop frames 16, 17 are formed on the peripheral wall 12 facing the tips of the elastic tongues 14, 15. Formed on the outer peripheral surface of the container 10 are a plurality of ribs 19 that are useful when introduced into the mounting wall and fixed with an adhesive. This rib may be formed in a spiral shape.

In the assembly of the present embodiment, as shown in FIG. 5, a container 10 integrally formed with a magnet 20 and a magnetic plate 21 is inserted, and the locking projection 11a of the tongue arm 11 is inserted. The process is completed when the locking hole 21a of the magnetic plate 21 is entered. At the time of insertion, the tongue arm 11 is pushed outward and can be inserted with a light force. When the insertion is completed, as shown in FIG. 1, the magnetic plate 21 is vertically supported by the locking projections 11a and the elastic tongues 14 and 15, and the magnet 20 and the magnetic plate 21 are in the state shown in FIG. And is elastically supported so that it can move vertically between the states shown in FIG. Here, FIG. 6 shows a state in which the magnetic plate 21 has abutted against the stop frames 16 and 17. This magnetic holder is embedded with an adhesive in a portion where furniture and equipment doors come into contact with each other in a closed state. At this time, since the tongue arm portion 11 constitutes a part of the wall surface of the container 10, there is no risk that the position of the locking projection 11a will be firmly fixed and the magnet 20 will slip out after being embedded. The flexure of the tongue arm 11 at the time of assembly is ensured by its elongated shape, and it is preferable to use the vertically extending tongue arm in a small-diameter cylindrical container as in this embodiment. In some cases, it is desirable to make the shape stretched in the transverse direction. In any case, the shape of the opening 18 for accommodating the tongue arm is not limited to the shape of the tongue arm, but the shape is the same as that of the tongue arm 11 and the gap between the tongue arm 11 and the peripheral wall 12 is set. It should be as small as possible. Further, the locking portion does not necessarily have to be provided at the tip of the tongue arm portion, and may be separated from the base portion of the tongue arm portion connected to the peripheral wall 12 to some extent. For example, it is possible to form a band-shaped tongue arm part having both ends connected to the upper part and the lower part of the peripheral wall 12 in the opening part, and provide the locking part on the inner surface of the central part of the tongue arm part.

In this embodiment, since the tips of the elastic tongues 14 and 15 support the lower ends of the magnetic plates 21 on both sides, the posture is maintained even if the gap between the magnet 20 and the magnetic plate 21 and the peripheral wall 12 is large. Is stable and the lifting operation is performed smoothly. These elastic tongues 14 and 15 are particularly effective in the case of a small-diameter magnetic holder, and since both elastic tongues 14 and 15 extend in opposite directions and intersect, a small-diameter container is sufficient. The length of the magnet can be secured, the stroke of the magnet can be increased, and the elastic characteristics can be made flexible and uniform. Further, since the tongue portions 14 and 15 can be thickened because the length can be secured, the accuracy of the elastic force can be secured, and the elastic force can be adjusted by, for example, changing the base thickness of the tongue portion. It's easy. In this case, since the stop frames 16 and 17 are provided on the tip side of the elastic tongue, unlike the conventional example in which the stop is formed at the base of the tongue, the length of the tongue does not depend on the size of the stop frame. Since the height can be secured, the formation of the stop does not hinder the downsizing of the holder. Although a pair of elastic tongues are provided in this embodiment, it is optional to provide more tongues as long as at least a pair of tongues extending in opposite directions are provided. The tip of the elastic tongue does not necessarily have to extend to the vicinity of the peripheral wall 12 on the opposite side, and as long as both tongues intersect, the tongue of the tongue can be adjusted depending on the structure of the magnet and the magnetic plate and the sliding characteristics in the vertical direction. This includes cases where the length is set short. On the contrary, the tongue portion may be formed long and the tip of the tongue portion may abut against the stop frame when the magnetic plate descends. In this case, naturally, the upper end of the stop frame is formed downward by the thickness of the tongue.

The present invention can be applied to various shapes and structures without being limited to the above embodiments as long as it is a component that holds a magnetic body with magnetic force. The structure of the plate is not limited. In addition, it can be applied to, for example, a magnet having no magnetic plate and only a magnet inserted therein, or a holder capable of cutting off magnetic force by an electromagnetic coil. Further, although the present invention shows a structure particularly suitable for a small-sized holder, it is not limited to a small-sized holder, and in general, it has a large effect on the manufacturing cost by reducing the number of parts and the number of assembling steps. Is.

[0011]

[Effect of device]

 As described above, the present invention is characterized by including the pair of elastic tongues extending in the opposite directions so as to intersect with each other, and therefore, the following effects are obtained. Since the length of the tongue can be secured even when the holder is downsized, the stroke of the magnetic force generating means can be increased, and the elastic characteristics can be set flexibly and uniformly. Further, since the tongue portion can be formed thick, the elastic force can be set with high accuracy, and the elastic force can be easily adjusted. Since the stop is formed on the tip side of the tongue, the size of the holder is not hindered even if the stop is formed. Since the tongue arm extends inside the opening of the peripheral wall and the lock is provided inside the part that is separated from the base, it is easy to insert the magnetic force generation member even if it is downsized, and only after the attachment, the magnetic force is generated. It is possible to completely prevent the member from coming out.

[Brief description of drawings]

FIG. 1 is a partial longitudinal sectional view showing the structure of an embodiment of a magnetic holder according to the present invention.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a plan view of the same embodiment.

FIG. 4 is a bottom view of the example.

FIG. 5 is a partial vertical cross-sectional view of the same embodiment showing a state when a magnet is inserted.

FIG. 6 is a partial vertical cross-sectional view of the same embodiment showing a state where a magnet is pushed in.

7A is an exploded perspective view showing the structure of a conventional magnetic holder, and FIG. 7B is a partial cross-sectional view showing the structure of a small-sized conventional magnetic holder.

[Explanation of symbols]

 10 Container 11 Tongue Arm 11a Locking Protrusion 12 Circumferential Wall 13 Storage Hole 14,15 Elastic Tongue 16,17 Stop Frame 18 Opening 20 Magnet 21 Magnetic Plate 21a Locking Hole

Claims (3)

[Scope of utility model registration request] 1. A magnetic force generating member, an accommodating member that accommodates the magnetic force generating member from a predetermined direction, a locking portion that locks the magnetic force generating member in the accommodating member, and the magnetic force generating member in the opposite accommodating direction. In a magnetic holder having a biasing elastic portion, the elastic portion includes a pair of tongue portions that are integrally formed inside the accommodating member and that protrude and intersect in mutually opposite directions from substantially opposing peripheral wall sides of the accommodating member. Characteristic magnetic holder. 2. The stop member for limiting the movement of the magnetic force generating member in the accommodating direction is provided on the lower inside of the peripheral wall facing the tip side of the tongue portion. Magnetic holder. 3. A magnetic force generating member, an accommodating member that accommodates the magnetic force generating member from a predetermined direction, a locking portion that locks the magnetic force generating member in the accommodating member, and the magnetic force generating member is attached in the opposite accommodating direction. In a magnetic holder having a biasing elastic portion, a tongue arm extending from a part of the peripheral wall around the opening is integrally formed in the opening formed in the peripheral wall of the housing member, A magnetic holder characterized in that the locking portion is provided inside a portion separated from the base portion.