JP2017025550A - magnet catch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnet catch capable of stably holding an object by elastically deforming an arm.SOLUTION: An arm 40 has a base end 41 extending upward from a lower end surface 10b, and a distal end 42 confronting the base end 41 in a vertical direction Z. The distal end 42 of the arm 40 is separated from a storage portion 30 toward an outer side in a longitudinal direction Y, and a dimension of the arm 40 in a width direction X is gradually enlarged toward the distal end 42 from the base end 41.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a magnet catch that holds two objects close to each other by magnetic force.

  2. Description of the Related Art Conventionally, a magnet catch used for furniture doors and the like for maintaining the closed state of the door is known. For example, in Patent Document 1, permanent magnets are housed in a rectangular case having a longitudinal direction, a width direction, and an up-down direction, and arms that can be elastically deformed are disposed on both sides facing each other in the longitudinal direction of the case. A magnet catch in which is arranged is disclosed.

JP 2002-147094 A

  According to the magnet catch disclosed in Patent Document 1, the arm is elastically deformable in the longitudinal direction of the case, and is fixed using the restoring force of the arm in a state of being inserted into an attachment hole formed in a door or the like. Can do.

  However, when the width of the arm is the same from the base end to the tip, and the width is relatively small to facilitate elastic deformation of the arm, the object at the tip is However, if the width dimension required to stably hold the object is relatively large, the arm may not be elastically deformed.

  The present invention is an improvement of a conventional magnet catch, and relates to providing a magnet catch that can hold an object stably by elastically deforming an arm.

  In order to solve the problems, the present invention relates to a magnet catch having a longitudinal direction, a width direction, and a vertical direction intersecting with the longitudinal direction.

  The magnet catch according to the present invention includes upper and lower end surfaces facing each other in the vertical direction, a storage portion in which a permanent magnet is stored in the interior extending in the vertical direction between the upper and lower end surfaces, and both longitudinal sides of the storage portion. An arm portion located on the lower end surface, the arm portion including a base end portion extending upward from the lower end surface, and a tip end portion facing the base end portion in the vertical direction, The distal end portion is spaced apart from the housing portion toward the outside in the longitudinal direction, and the dimension of the arm in the width direction is gradually increased from the proximal end portion toward the distal end portion. .

The present invention has the following preferred embodiments.
(1) The width direction dimension of the base end part of the arm part is smaller than the width direction dimension of the housing part.
(2) On the outer surface of the tip portion of the arm portion, a stepped surface that becomes narrower as it goes upward is formed.
(3) It further has a circular head located above the accommodating portion, and the arm portion has a curved shape along the outer shape of the head.
(4) The arm portion has opposite side edges in the width direction, the side edges extending obliquely upward from the lower end surface, and the width direction from the first inclined portion in the width direction. A bent portion that is bent outward, and a second inclined portion that is further inclined upward from the bent portion toward the outside in the width direction.

  In the magnet catch according to the present invention, since the dimension in the width direction of the arm gradually increases from the base end portion toward the tip end portion, the base end portion has flexibility and is easily elastically deformed. On the other hand, since the tip has a relatively large contact area with the object, the magnet catch can be stably fixed to the object.

The perspective view of a magnet catch. The front view of a magnet catch. The side view of a magnet catch. The exploded perspective view of a magnet catch. (A)-(c) Explanatory drawing which shows the attachment state of a magnet catch.

  The magnet catch 10 according to the present invention has a width direction X, a longitudinal direction Y, and a vertical direction Z that intersect each other, and is accommodated in an upper end surface 10a and a lower end surface 10b, a case 20, and the case 20. A permanent magnet 50 and a lid 60 that closes the lower end opening 20b of the case 20 are included. The magnet catch 10 is attached to the circular mounting hole 2 of the object 1, and can connect the object 1 and the object (not shown) opposite to the object 1 in close proximity by an internal magnetic force. . In the present specification, for the sake of explanation, one side facing the magnet catch 10 in the width direction X is referred to as a front side, and the other side is referred to as a back side.

  2 to 4, the case 20 is a hard plastic housing that houses a permanent magnet, and includes an upper end surface (outer surface of the head portion 21) 10 a and a lower end opening 20 b, and a circular head portion 21. And the accommodating part 30 in which the permanent magnet was accommodated inside, and the arm part 40 located in the both sides of the width direction X of the accommodating part 30 are included. The accommodating portion 30 is hollow with a rectangular cross section, and a rectangular parallelepiped permanent magnet 50 is inserted into the inside through an opening located on the lower side. The case 20 is assembled by fitting the lid 60 to the opening edge of the lower end opening 20b of the case 20 in a state where the permanent magnet 50 is inserted into the housing portion 30. The lid 60 may be detachably fitted to the case 20 or may be joined by an adhesive.

  The accommodating portion 30 has a rectangular parallelepiped shape, and includes a front surface 31 and a back surface 32 facing each other in the width direction X, one side surface 33 and the other side surface 34 facing each other in the longitudinal direction Y, and a permanent magnet 50 defined by them. And a space portion 35 in which is disposed. The front surface 31 and the rear surface 32 of the accommodating part 30 have a bellows shape formed by a plurality of protrusions arranged side by side in the vertical direction. A plurality of permanent magnets 50 may be arranged in the space portion 35 of the housing portion 30, or a single or a plurality of steel yokes may be arranged to amplify the attractive force of the permanent magnet 50.

  The arm portion 40 opposes the upper end edge 40 a and both side edges 43, the base end portion 41 extending upward from the lower end surface 10 b wider than the base end portion 41 of the magnet catch 10, and the base end portion 41 in the vertical direction Z. And a distal end portion 42. The distal end portion 42 has a stepped shape that becomes gradually narrower from the bottom to the top, and has first to third step portions 42a to 42c that are continuous from the top to the bottom. Referring to FIG. 3, the width of the arm portion 40 gradually increases from the base end portion 41 toward the tip end portion 42. Both side edges 43 of the arm portion 40 have a first inclined portion 43a extending so as to be gradually separated from the lower side toward the upper side in the width direction X, and slightly in the width direction X below the stepped tip portion 42. A bent portion 43b that bends outward and a second inclined portion 43c that extends further outward in the width direction X from the bent portion 43b. Since both side edges 43 of the arm portion 40 have the bent portions 43b, the width dimension W2 of the distal end portion 42 with respect to the base end portion 41 as compared with the case where the first inclined portion 43a extends to the upper end edge 40a. Can be formed larger. Specifically, the dimension W1 in the width direction X of the narrowest part of the base end part 41 is about 50 to 80% of the dimension W2 in the width direction X of the widest part of the tip part 42, preferably Is about 60-70% in size. However, as long as the base end portion 41 has the required flexibility and the tip end portion 42 has the required contact area, the arm portion 40 gradually increases in width from the base end portion 41 toward the tip end portion 42. You may have the shape which becomes.

  Further, the width dimension W <b> 1 of the base end portion 41 of the arm portion 40 is smaller than the width dimension W <b> 3 of the one side surface 33 (or the other side surface 34) of the housing portion 30. Since the arm portion 40 has the required flexibility, the base end portion 41 has a relatively small width dimension W1. Therefore, when the magnet catch 10 is stored and transported, the magnet catch 10 is impacted from the outside. However, both ends of the base end portion 41 may be chipped or broken, but the base end portion 41 is less than the width dimension W3 of the housing portion 30 due to the width dimension W1 of the base end portion 41 being smaller. There is no risk of damage from direct impact. Further, in the illustrated embodiment, the width dimension W <b> 2 of the distal end portion 42 of the arm portion 40 is smaller than the width dimension W <b> 3 of the accommodating portion 30. The width dimension W2 of the distal end portion 42 needs to be appropriately adjusted according to the size of the mounting hole 2 and may be larger than the width dimension W3 of the accommodating portion 30, but as in the illustrated embodiment. When the width dimension W2 is smaller than the width dimension W3, the entire arm portion 40 does not extend outward from the accommodating portion 30 in the width direction X, and the magnet catch 10 receives an external impact during storage and transportation. Even in this case, there is no possibility that both ends of the sharp tip portion 42 are damaged.

  Referring to FIG. 1 and FIG. 4B, the arm portion 40 is located slightly outside the circular head 21 in the longitudinal direction Y and has a curved shape along its outer shape. Since the arm portion 40 has a curved shape, it comes into contact with the periphery of the opening of the mounting hole 2 of the object 1 in a planar manner as compared with the case where the arm portion 40 has a flat plate shape. be able to.

  Referring to FIG. 2, the head portion 21, the housing portion 30, and the arm portion 40 that form the case 20 are integrally formed, and the base end portion of the housing portion 30 and the base end portion 41 of the arm portion 40 are The case 20 is integrated at the lower end 20b. Moreover, the arm part 40 is extended outside the longitudinal direction Y so that it may gradually separate from the accommodating part 30 toward the upper side from the lower end surface 10b. Specifically, the separation dimension R1 in the longitudinal direction Y between the one side surface (or the other side surface) of the housing portion 30 at the base end portion 41 and the inner surface of the arm portion 40 is the one side surface of the housing portion 30 at the distal end portion 42 ( Or the other side surface) and the inner surface of the arm portion 40 have a size of about 40 to 70%, preferably about 50 to 60%, of the separation dimension R2 in the longitudinal direction Y. Since the case 20 has such a configuration, the arm portion 40 can be elastically deformed in the length direction so as to approach and separate from the housing portion 30.

  5A to 5C, the magnet catch 10 is fixed to the mounting hole 2 of the symmetrical object 1 having a diameter D2 slightly smaller than the diameter D1 of the head 21. The operation when the magnet catch 10 is attached to the attachment hole 2 of the object 1 will be described. First, the accommodating portion 20 of the magnet catch 10 is inserted into the attachment hole 2 from the front side of the object 1. At this time, since the diameter dimension D2 of the attachment hole 2 is slightly smaller than the diameter dimension D1 of the head portion 21, the pair of arm portions 40 are brought into contact with the opening edge of the attachment hole 2 to the inside in the longitudinal direction Y. Elastically deforms. In such a state, when the magnet catch 10 is further pushed in, the head 21 of the case 20 abuts against the inner surface of the object 1 and is prevented from being inserted, and the object 1A to the object 1A to the object 1A are restored by the restoring force of the elastically deformed arm part 40. The objects 1A to 1C are clamped by the step portions 42a to 42c corresponding to the plate thicknesses t1 to t3 of 1C and the head 21, and the magnet catch 10 is stably attached to the object 1.

  As described above, in order to elastically deform the arm portion 40 and stably attach the arm portion 40 to the object 1 by its restoring force, the base end portion 41 of the arm portion 40 is preferably relatively narrow. This is because if the base end portion 41 is relatively wide, the flexibility becomes low and the required restoring force may not be exhibited. On the other hand, the step portions 42a to 42c that contact the opening edge 2a of the mounting hole 2 in the tip portion 42 preferably have a relatively wide width in order to have a sufficient contact area. In the arm portion 40 according to the present embodiment, the width dimension W1 of the proximal end portion 41 is smaller than the width dimension W2 of the distal end portion 42, and the proximal end portion 41 is relatively narrow, while the distal end portion 42 is relatively relatively small. Therefore, the base end portion 41 can exhibit sufficient flexibility and can secure a sufficient contact area with the object 1, thereby fixing the magnet catch 10 more stably. be able to.

  Further, both side edges 43 of the arm portion 40 have a first inclined portion 43a extending upward from the lower end 10b, and a second inclined extending further upward in the width direction X from the bent portion 43b than the first inclined portion 43a. Since the portion 43b is included, the width dimension of the tip portion 42 can be formed larger than when the first inclined portion 43a extends to the tip, and the contact area with the object 1 can be provided. .

  5A shows an object 1A having a relatively small plate thickness t1 corresponding to the stepped portion 42a, and FIG. 5B shows an object corresponding to the stepped portion 42b and having a plate thickness t2 larger than the object 1A. In the object 1B, FIG. 5C, the magnet catch 10 is attached to the object 1C having a plate thickness t3 larger than the object 1B, and a plurality of stepped parts 42a are provided at the distal end part 42 of the arm part 40. By forming the step surface consisting of ~ 42c, it is possible to adapt to the attachments 1A to 1C having different thicknesses t1 to t3.

  Moreover, when the arm part 40 is flat form, there exists a possibility that a clearance gap may be formed between the opening edge of the circular attachment hole 2, and attachment may become unstable, but it follows the outer shape of the head 21. Since it has a curved shape, it is stably fitted and firmly fixed to the opening edge 2a of the circular mounting hole 2.

  Further, since the front and rear end surfaces 31 and 32 of the accommodating portion 20 are accordion-like, friction resistance is likely to be generated with respect to the opening edge of the mounting hole 2 as compared with the case where it is smooth, and the magnet catch 10 Movement is suppressed. Further, when the magnet catch 10 is attached to a wooden board having a required board thickness, the bellows-like front and rear end faces 31 and 32 come into contact with the inner peripheral surface of the wooden board attaching hole, whereby the elasticity by the arm portion 40 acts. Even if it is not, it can be stably attached to the wooden board.

DESCRIPTION OF SYMBOLS 10 Magnet catch 10a Upper end surface 10b Lower end surface 21 Head 30 Storage part 40 Arm part 41 Base end part 42 Front end part 43 Both sides edge 43a of the arm part 1st inclination part 43b Bending part 43c 2nd inclination part 50 Permanent magnet W1 Arm part Width dimension W2 of the proximal end of the arm Width dimension W3 of the distal end of the arm part Width dimension X of the receiving part X Width direction Y Longitudinal direction Z Vertical direction

Claims (5)

In a magnet catch having a longitudinal direction, a width direction, and a vertical direction intersecting them,
There are upper and lower end surfaces facing each other in the up and down direction, an accommodating portion in which a permanent magnet is accommodated inside the upper and lower end surfaces extending in the up and down direction, and arm portions located on both sides in the longitudinal direction of the accommodating portion. And
The arm portion has a proximal end portion extending upward from the lower end surface, and a distal end portion facing the proximal end portion in the up-down direction,
The distal end portion of the arm portion is separated from the housing portion toward the outside in the longitudinal direction, and the dimension of the arm portion in the width direction gradually increases from the proximal end portion toward the distal end portion. The magnet catch characterized by the above-mentioned.   The magnet catch according to claim 1, wherein a dimension in the width direction of the base end part of the arm part is smaller than a dimension in the width direction of the housing part.   The magnet catch according to claim 1 or 2, wherein a stepped surface that becomes narrower as it goes upward is formed on an outer surface of the tip portion of the arm portion.   The magnet catch according to any one of claims 1 to 3, further comprising a circular head positioned above the housing portion, wherein the arm portion has a curved shape along an outer shape of the head.   The arm portion has opposite side edges in the width direction, and the both side edges are bent obliquely upward from the lower end surface, and bent outward from the first slope portion in the width direction. The magnet catch according to any one of claims 1 to 4, further comprising a bent portion that extends and a second inclined portion that extends further upward from the bent portion toward the outside in the width direction.