JPH0335131Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a magnetic joint that utilizes the attraction and repulsion properties of a magnet to attach and detach a connecting portion.

BACKGROUND OF THE INVENTION Many accessories such as necklaces and earrings, and small articles such as key chains have a removable connection part. The structure of these connection parts is, for example, one in which a pair of male and female threads are screwed together, a claw part in a hook hole, or a pair of magnets to attract each other. and so on. However, these devices each had drawbacks such as the connection portions being difficult to handle, insufficient connection strength, and lack of durability.

Purpose of the invention Therefore, the purpose of the present invention is to move the locking member in and out using the attraction and repulsion forces of the magnet, and to engage the locking member with the abutting portion to easily and reliably attach and detach the connecting portion. It is to have the person do it.

Summary of the invention Therefore, the present invention combines a connecting shaft and an outer cylinder that fits into the connecting shaft, and the connecting shaft is equipped with a movable magnet as a locking member that moves in and out by the attraction and repulsion between the magnets. ing. Furthermore, a slide ring magnet is provided inside the outer cylinder to attract and repel the movable magnet to move it in and out from the circumferential surface of the connecting shaft, and the polarity can be reversed with respect to the movable magnet by rotation. There is. That is, when the connecting shaft is inserted into the outer cylinder through the insertion port and the movable magnet is attracted to the slide ring magnet, the movable magnet protrudes from the circumferential surface of the connection shaft, and this protruding portion touches the edge of the insertion port. It is locked when it hits the part, resulting in a connected and locked state. Furthermore, when the polarity is reversed by displacing the slide ring magnet in this state, the movable magnet repulses against the slide ring magnet and is drawn into the connection shaft. As a result, the locking state of the movable magnet is released, and the connecting shaft is separated from the outer cylinder. In this way, the movable magnet can be locked and released simply by displacing the slide ring magnet, so that reliable connection (locking) and release can be easily performed.

Configuration of Embodiment Hereinafter, the configuration of an embodiment of the present invention will be specifically described based on the drawings.

1, 2 and 3 show the structure of a magnetic joint 1 of the present invention.

The main parts of this magnetic joint 1 include a connecting shaft 2, an outer cylinder 3, and a slide ring 4.
It is made up of.

A connecting piece 5 is formed at one end of the connecting shaft 2, which is one of the connecting members, and a guide hole 6 is formed in the shaft portion 2a so as to penetrate in the radial direction. An internal magnet 7 is fixed to the center of the guide hole 6.
For example, two movable magnets 8 are provided so as to be movable in the direction of this hole so as to face each other across the hole. Here, the movable internal magnet 7 has a polarity that attracts the magnet 8, and the movable magnet 7 has a polarity that attracts the connecting shaft 2.
In the open state, the movable magnet 8 is attracted to the internal magnet 7 and is retracted inward from the circumferential surface of the connecting shaft 2.

The cylindrical outer tube 3, which is the other connecting member, has a connecting piece 9 formed at one end, and a connecting shaft 2 at the other end.
An insertion opening 10 is formed. This insertion port 10
has a hole diameter slightly larger than the shaft diameter of the connecting shaft 2, and the inner side of the edge 11 of the insertion port 10 forms a contact portion 12 for the movable magnet 8 when it is in the protruding state. Further, in the peripheral wall of the outer cylinder 2, a guide elongated hole 13 is cut out by a certain length in the circumferential direction.
are formed in two locations facing each other at 180° to the center.

A slide ring 4 of the cylindrical body is placed inside the outer cylinder 3 in a substantially sliding state with respect to the circumferential surface 14, and the peripheral wall of the slide ring 4 includes:
Two slide pins 15 are attached facing each other at 180 degrees, and protrude to the outside of the outer cylinder 3 through the guide elongated hole 13. That is, the slide ring 4 is prevented from moving in the axial direction by the engagement between the slide pin 15 and the guide slot 13, and its rotation in the circumferential direction is restricted within the range of the guide slot 13.

Furthermore, two slide ring magnets 16 and 17 having opposite polarities are attached to the tip of the slide ring 4 along the peripheral wall thereof, and two sets of slide ring magnets 16 and 17 are provided facing each other at 180 degrees. Here, the slide ring magnet 16 has a polarity that attracts the movable magnet 8. Then, the slide ring 4 is inserted into the guide slot 1 by the slide pin 15.
The guide elongated hole 1 is set so that the center position of the slide ring magnet 17 moves to the center position of the slide ring magnet 16 when the slide ring magnet 17 is rotated by a length of 3.
3 length, and slide ring magnet 1
Positions 6 and 17 are set.

Further, a convex protrusion 18 is formed on the peripheral edge of the insertion port 10 of the outer cylinder 3, and on the other hand, a convex protrusion 18 is formed on the peripheral edge of the insertion port 10 of the outer cylinder 3.
A guide groove 19 is formed in the axial direction of the shaft portion 2a to be guided while slidingly contacting the projection portion 18. In this way, the relative positions of the outer cylinder 3 and the connecting shaft 2, that is, the relative fitting positions of the movable magnet 8 and the slide ring magnet 16 are adjusted.

Effects of the Embodiment Next, the effects of the magnetic joint 1 will be explained.

When the connecting shaft 2 and the outer cylinder 3 are separated,
The movable magnet 8 is attracted to the internal magnet 7 and retracted into the shaft portion 2a. In this state, while engaging the guide groove 19 and the protrusion 18, the connecting shaft 2
When the movable magnet 8 is inserted into the outer cylinder 3 through the insertion opening 10, the movable magnet 8 becomes opposed to the slide ring magnet 17, as shown in FIG. Here, when the slide ring 4 is rotated by the length of the guide slot 13 by the slide pin 15, the slide ring magnet 16 has a stronger magnetic force than the internal magnet 7, so the movable magnet 8 is separated from the internal magnet 7. Let it absorb. At this time, the movable magnet 8 is in a state of protruding from the peripheral surface of the connecting shaft 2, and has a height such that its protruding surface 20 can collide with the contact portion 12. As a result, the connecting shaft 2 is locked to the outer cylinder 3, and is in a connected state. This situation is shown in FIGS. 1 and 2.

To release this connected state, the slide pin 15 is slid along the guide elongated hole 13 so that the slide ring 17 of opposite polarity opposes the movable magnet 8. At this time, the movable magnet 8 is
It receives a repulsive force from the slide ring magnet 17 and is attracted to the internal magnet 8, and the shaft portion 2a
Pull inward. Therefore, the above-mentioned locked state is released, and the connecting shaft 2 is separated from the outer cylinder 3.

Modification of the invention The direction of displacement of the slide ring 4 may be not the circumferential direction but the axial direction, and one of the two movable magnets 8 and the internal magnet 7
can also be omitted. This magnetic joint can also be used as a flat type for locking trunks and bags. In that case, the connecting piece 5 may be constructed integrally with the key or as a part that fits into the key.

Effects of the invention The magnetic joint of this invention uses two types of slide ring magnets with opposite polarities to move the movable magnet in and out and lock it with the outer cylinder, resulting in a secure and strong connection. The state is obtained. In addition, the polarity can be reversed simply by sliding the slide ring magnet, so no relative rotational movement is required between the connecting shaft and the outer cylinder. The magnetic joint can be easily attached and detached.

[Brief explanation of drawings]

1 and 2 are cross-sectional views showing the structure and connection state of the present invention, and FIG. 3 is a cross-sectional view showing the disconnected state of the present invention. 1...Magnetic joint, 2...Connection shaft,
3... Outer cylinder, 4... Slide ring, 8... Movable magnet, 10... Insertion opening, 16, 17... Slide ring magnet.

Claims (1)

[Scope of utility model registration request] In a magnetic joint, in which a connecting shaft is inserted into an outer cylinder and is attached and detached by the attraction and repulsion force of the magnet, a movable magnet is provided on the connecting shaft as a locking member that can freely move in and out in the diametrical direction. A slide ring magnet with a polarity in the attraction direction and a polarity in the repulsion direction with respect to the movable magnet is provided inside the magnet so as to be freely displaceable by a slide ring, and a contact portion that contacts the movable magnet protruding from the outer cylinder and an axial direction of the connecting shaft are provided inside. A magnetic joint characterized in that it is formed with protrusions that come into sliding contact with guide grooves.