JPH0613105U - Adsorption tool using a permanent magnet - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an attraction tool at a low cost, which avoids peeling between a permanent magnet and a ferromagnetic case incorporating the permanent magnet. [Structure] One side of a magnetic pole is attached to the bottom surface of a substantially dish-shaped ferromagnetic case 3 and the opening edge 3b of the above-mentioned ferromagnetic case 3 is directed toward the periphery of the other side of the permanent magnet 2 incorporated therein. An adsorption tool 1 that uses a permanent magnet that is inclined and covers the periphery of the permanent magnet 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an attraction tool using a permanent magnet used for an office permanent magnet clip or the like that is attached to a magnetic plate or the like to fix memos and the like.

[0002]

[Prior art]

 As shown in the cross-sectional view in FIG. 4, the attraction tool 10 using a conventional permanent magnet of this type is formed by molding a permanent magnet 11 such as a ferrite magnet into a columnar shape or a prismatic shape. A box-shaped case (12) made of a magnetic material was fitted and configured. Then, the permanent magnet 11 and the case 12 are joined together by using a double-sided adhesive tape or an adhesive agent 13. Further, as shown in FIG. 5, an appropriate cover 14 such as plastic is attached, It was used as an office clip 15, etc.

[0003]

[Problems to be solved by the device]

 However, in such a conventional technique, since the double-sided adhesive tape or the adhesive 13 is separately required in addition to the permanent magnet 11 and the case 12, the manufacturing cost is soared. In particular, for clips 15 that use this type of suction tool, it is necessary to set the selling price itself to a relatively low price, so the rise in the manufacturing cost of suction tools has led to a decline in the profit margin. Is. Further, when the permanent magnet 11 and the case 12 are adhered to each other by using the double-sided adhesive tape or the adhesive 13, the permanent magnet 11 and the case 12 are relatively easily peeled off by dropping the clip 15 from the mounting position. There was also a problem.

[0004]

[Means for Solving the Problems]

 The present invention has been devised in view of the problems of the conventional technology, and in order to eliminate the separation between the permanent magnet and the case, and to provide an attracting tool at a low cost. The invention of No. 1 is that the opening edge of the ferromagnetic case 3 is directed toward the peripheral edge of the other magnetic pole surface of the permanent magnet 2 which is installed by adsorbing one magnetic pole surface on the bottom surface of the ferromagnetic case 3 having a substantially dish shape. 3b is an inclined adsorption tool 1 using a permanent magnet that is inclined and covers the periphery of the permanent magnet 2.

Further, the invention of claim 2 is an attraction tool 1 using a permanent magnet in which an opening edge 3b of the ferromagnetic case 3 is deformed under pressure on the peripheral edge side of the permanent magnet 2. .

According to a third aspect of the present invention, the ferromagnetic case 3 having a substantially dish shape is attracted to one magnetic pole surface of the bottom surface of the ferromagnetic case 3 and is attached to the periphery of the other magnetic pole surface of the permanent magnet 2. The adsorption tool 1 uses a permanent magnet that is inclined at the opening edge 3b of the case 3 and covers the chamfered surface 2b provided on the peripheral edge of the permanent magnet 2.

[0007]

【Example】

 Hereinafter, a typical embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a forming process of the suction tool 1 of the present invention, in which 2 is a permanent magnet and 3 is a ferromagnetic case.

The permanent magnet 2 is typically made of a hard magnet such as a ferrite magnet, and is typically formed in a cylindrical shape. However, the permanent magnet 2 is formed in any other shape such as a prismatic shape according to design requirements. . In this permanent magnet 2, the peripheral edge of the magnetic pole surface may be the chamfered surface 2a.

The ferromagnetic case 3 is formed by forming a magnetic material such as an iron plate into a dish shape, and has a volume capable of accommodating the permanent magnet 2 in the ferromagnetic case 3 closely or with a slight gap. Have The opening edge of the ferromagnetic case 3 has such a height that it slightly protrudes above the magnetic pole surface of the permanent magnet 2 when the permanent magnet 2 is housed.

In the ferromagnetic case 3, the opening edge 3b is inclined 3a to cover the peripheral edge of the permanent magnet 2, and when the peripheral edge of the permanent magnet 2 is provided with a chamfered surface 2b, This chamfered surface 2b is supposed to be covered. Incidentally, in order to cover the peripheral edge of the permanent magnet 2, it may be caused by pressure deformation, and in that case, a method such as press working is usually used.

FIG. 3 shows a state in which the suction tool 1 of the present invention is used as a clip 5 for office work, in which an appropriate cover 4 formed of plastic or the like is attached to the suction tool 1. is there. The suction tool 1 of the present invention can also be used as a suction means for a range hood provided around a gas range.

[0013]

[Effect of device]

 Since the present invention has the above-described structure, the peripheral edge of the permanent magnet is covered with the opening edge of the ferromagnetic case without using adhesive or double-sided adhesive tape. The magnet and the magnet are firmly joined together to reduce the manufacturing cost, and it is possible to avoid peeling between the ferromagnetic case and the permanent magnet due to an accidental drop when used as an office clip or the like. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing a molding process of the present invention.

FIG. 2 is a sectional view of the device.

FIG. 3 is a perspective view of a usage example of the present invention.

FIG. 4 is a cross-sectional view of a conventional technique.

FIG. 5 is a perspective view of a usage example of the prior art.

[Explanation of symbols]

 1 Adsorption tool 2 Permanent magnet 2a Chamfered surface 3 Ferromagnetic case 3a Tilt 3b Opening edge 4 Cover 5 Clip

Claims (3)

[Scope of utility model registration request] 1. An opening edge of the ferromagnetic case is inclined toward a peripheral edge of the other magnetic pole surface of a permanent magnet, which is installed by adsorbing one magnetic pole surface on the bottom surface of a substantially dish-shaped ferromagnetic case. And an adsorption tool using a permanent magnet, characterized in that it covers the periphery of the permanent magnet. 2. The attraction tool using a permanent magnet according to claim 1, wherein an opening edge of the ferromagnetic case is pressure-deformed on a peripheral side of the permanent magnet. 3. An opening edge of the ferromagnetic case is inclined toward the peripheral edge of the other magnetic pole surface of the permanent magnet incorporated by adsorbing one magnetic pole surface on the bottom surface of the substantially dish-shaped ferromagnetic case. And a chamfered surface provided on the periphery of the permanent magnet.