JP2017031788A - Lower bracing device for top-hinged swinging door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lower bracing device for a top-hinged swinging door that attracts a guide pin for certain and inserts the guide pin to a guide groove member installed on a swinging door body.SOLUTION: A magnet 9 disposed in a guide groove member 5 comprises a rod-form magnet having magnetic poles of different polarities in a longitudinal direction. The rod-form magnet 9 is arranged so that a magnetic pole side attracted by a magnet 25 disposed on a guide pin 2 is positioned on an end side in a direction of movement of a top-hinged swinging door body 4. A flange-like rail part 8 that holds the guide pin 2 is provided at a central location in the direction of movement of the top-hinged swinging door body 4, where the magnet 25 disposed on the guide pin 2 is exposed to repulsive force of the rod-form magnet 9.SELECTED DRAWING: Figure 3-2

Description

  The present invention relates to a suspension door lower swinging device, and more particularly to a suspension door guide device that can reliably hold a guide pin and stably guide the suspension door.

  Conventionally, for example, as disclosed in Patent Documents 1 to 3, a suspension door suspended on a ceiling rail via a runner can be protruded by a magnetic force on a floor surface installation member installed on the floor surface. 2. Description of the Related Art There is known a suspension door lower swing device for guiding a suspension door by inserting a provided guide pin into a guide groove formed on a lower surface of the suspension door body.

  Among them, in the lower swinging device for a hanging door disclosed in Patent Document 1, a floor surface installation in which a guide pin having a magnet disposed at a tip portion is accommodated in a case installed on the floor surface so as to protrude upward. By disposing a member and a magnet to which the guide pin is attracted and having a guide groove member installed in the suspension door body into which the guide pin attracted by the magnet is inserted, that is, the guide pin and The attracting force of the guide pin is increased by attracting the magnets disposed in the guide groove member.

  In addition, in the lower swinging device for a hanging door disclosed in Patent Documents 2 to 3, a floor surface installation member in which a guide pin is stored in a case installed on the floor surface so as to protrude upward, and the guide pin is inserted. A second guide that is slidably housed in a case, and a first guide that is slidably housed inside the second guide. The guide is formed in a telescopic structure by introducing the first guide projected at the end of the guide groove member into the middle portion of the guide groove formed with a narrower required width. By doing so, the height of the floor surface installation member can be kept low, and the restriction of installation on the floor surface can be eliminated.

JP 2005-226368 A JP 2005-163384 A JP 2007-308918 A

  By the way, in order to increase the suction force of the guide pin, when a magnet is provided on the guide pin and the guide groove member as in the suspension door lower swing device disclosed in Patent Document 1, the guide pin is provided on the guide groove member. At the end in the moving direction of the suspended door body of the magnet, repulsive force is generated between the magnets due to the action of the magnetic lines of force of the magnet disposed in the guide groove member, for example, when the moving speed of the suspended door body is large, etc. There is a problem that the guide groove member passes over the guide pin without being sucked.

  In particular, in order to keep the height of the floor surface installation member low, when the guide pin has a telescopic structure as in the lower swinging device of a hanging door disclosed in Patent Documents 2 to 3, the tip portion There is a problem in that the structure of the guide pin in which the magnet is disposed is complicated and the manufacturing cost is increased.

  The present invention has been made in view of the problems of the above-described conventional suspension door lower swing device, and the suspension is such that the guide pin is reliably sucked so that the guide pin is inserted into the guide groove member installed in the suspension door body. An object of the present invention is to provide a door bottom bracing device.

  In order to achieve the first object, the suspension door lower brace device according to the first aspect of the present invention accommodates a guide pin having a magnet disposed at the tip thereof in a case installed on the floor so as to protrude upward. The lower part of the suspension door provided with a floor surface installation member and a guide groove member installed in the suspension door body into which the guide pin attracted by the magnet is inserted and the guide pin attracted by the magnet is inserted In the anti-seismic device, the magnet disposed in the guide groove member is composed of a rod-shaped magnet having magnetic poles of different polarities in the longitudinal direction, and the magnetic pole side on which the magnet disposed on the guide pin attracts the rod-shaped magnet is a suspension door A lower swinging device for a hanging door, which is disposed so as to be positioned on an end side in a moving direction of the main body.

  In this case, a hook-shaped rail portion for holding the guide pin is provided at a position on the center side in the moving direction of the suspension door body where the magnet disposed on the guide pin receives the repulsive force from the rod-shaped magnet. can do.

  Further, the rod-shaped magnet can be arranged so as to be inclined so that the end portion side in the moving direction of the suspension door body is lowered.

  In addition, a magnetic material is disposed over the entire top surface of the guide groove of the guide groove member in the center of the suspension door body, and a magnet disposed on the guide pin is attached to the magnetic material on the bowl-shaped rail portion. The held guide pin can be attracted.

  Further, in order to achieve the first object, the suspension door lower brace according to the second aspect of the present invention can project a guide pin having a magnet disposed at the tip of the case installed on the floor surface upward. A suspension door provided with a floor surface installation member housed in a housing, and a guide groove member installed in a suspension door body into which a guide pin is attracted and a guide pin attracted by the magnet is inserted In the lower bracing device, the magnets arranged in the guide groove member are arranged on the end surface side in the moving direction of the bar-shaped magnet having a rectangular cross section having magnetic poles of different polarities on the upper and lower surfaces and the suspension door body of the bar-shaped magnet It is composed of a small piece magnet having a rectangular cross section with magnetic poles of different polarities on both surfaces in the moving direction of the hanging door body, and the small piece magnet is disposed on the lower surface side of the rod-like magnet of the magnet. Arranged so that the surface of the polarity different from the polarity is located on the rod-shaped magnet side And wherein the door.

  In this case, the rod-like magnet can be made of a ferrite magnet, and the small piece-like magnet can be made of a neodymium magnet.

  According to the lower swinging apparatus for a hanging door of the first invention, the magnet disposed in the guide groove member is composed of a bar-shaped magnet having magnetic poles of different polarities in the longitudinal direction, and the bar-shaped magnet is used as a guide pin. The magnet disposed in the guide groove member by the action of the magnetic lines of force of the magnet disposed in the guide groove member by arranging the magnetic pole side attracted by the disposed magnet to be located on the end side in the moving direction of the suspension door body. Can be prevented from generating repulsive force between the magnets disposed on the guide pins, and the guide pins can be reliably sucked so that the guide pins are inserted into the guide groove members installed in the suspension door body. .

  In addition, a hook-shaped rail portion that holds the guide pin is provided at a position on the center side in the moving direction of the suspension door body where the magnet disposed on the guide pin receives the repulsive force from the rod-shaped magnet. Thus, the guide pin can be smoothly transferred to the rail portion.

  In addition, the guide pin can be attracted more reliably by arranging the bar-shaped magnet so as to be inclined so that the end side in the moving direction of the suspension door body is lowered.

  In addition, a magnetic material is disposed over the entire top surface of the guide groove of the guide groove member in the center of the suspension door body, and a magnet disposed on the guide pin is attached to the magnetic material on the bowl-shaped rail portion. By causing the held guide pins to be attracted, the guide pins can be smoothly transferred from the rail portion to the guide groove of the guide groove member in the central portion of the suspension door body.

  Further, according to the lower swinging apparatus for the hanging door of the second invention, the magnets disposed in the guide groove members are a bar-shaped magnet having a rectangular cross section having magnetic poles of different polarities on the upper and lower surfaces, and the bar-shaped magnet. A small piece magnet having a rectangular cross section with magnetic poles of different polarities on both sides of the moving direction of the sliding door body, disposed on the end surface side of the sliding door main body in the moving direction. The end of the magnet in the moving direction of the suspension door body of the magnet disposed in the guide groove member by disposing the surface having a polarity different from the polarity on the lower surface side of the rod-shaped magnet of the magnet on the rod-shaped magnet side It is possible to adjust the direction of the magnetic lines of force of the magnets arranged in the guide groove member in the guide groove member, so that the magnets arranged in the guide groove member and the guide pins are arranged by the action of the magnetic force lines of the magnets arranged in the guide groove member. Prevent repulsion between the magnets Securely suction, it is possible to be inserted into the guide groove member installed on the guide pin hanging door body.

  In addition, the rod-like magnet is made of a ferrite magnet, and the small piece-like magnet is made of a neodymium magnet, so that the desired effect is achieved while reducing the amount of expensive neodymium magnet used. Can be.

1 shows an embodiment of a lower swinging device for a hanging door according to the present invention, in which (a) is a front longitudinal sectional view of a guide groove member, (b) is a bottom view thereof, and (c) is a guide groove at an end guide groove. Sectional drawing which shows the state which protruded, (d) is sectional drawing which shows the state in which the guide pin protruded in the intermediate part of the guide groove. The guide groove member is shown, (a) is a plan view, (b) is a front view, (c) is a sectional view taken along line AA of (a), (d) is a sectional view taken along line BB, (e). These are the CC arrow directional views. It is explanatory drawing which shows the polarity of the magnet used for the lower swinging apparatus of the hanging door of this invention, (a) is the Example corresponding to this 2nd invention, (b) is the Example corresponding to this 1st invention. is there. It is explanatory drawing which shows the guide groove member used for the lower swing apparatus of the hanging door of this 1st invention, (a) is a front longitudinal cross-sectional view of a guide groove member, (b) is the same bottom view, (c) is hanging FIG. 6 is a front longitudinal sectional view of a guide groove member at the center of the door main body, FIG. 5D is a side view, and FIG. 5E and FIG. 5F are sectional views showing a state where a guide pin is inserted into the guide groove member. A floor surface installation member is shown, (a) is sectional drawing which shows the state which the guide pin protruded, (b) is sectional drawing which shows the state which the guide pin retracted, (c) is other implementation of a floor surface installation member It is sectional drawing which shows an example. It is explanatory drawing which shows the various Example of the 1st guide of the guide pin of a floor surface installation member. The suspension door main body and a guide groove member are shown, (a) is front sectional drawing, (b) is a bottom view.

FIG. 1 to FIG. 6 show an embodiment of the lower swinging apparatus for a hanging door according to the present invention.
This suspension door lower brace includes a floor surface installation member 3 in which a guide pin 2 is accommodated so as to protrude upward in a case 1 installed on the floor surface, and a suspension door body 4 into which the guide pin 2 is inserted. And a guide groove member 5.
The guide pin 2 is formed in a nested manner by a second guide 22 slidably housed in the case 1 and a first guide 21 slidably housed in the second guide 22. At the same time, the first guide 21 projected by the magnetic force at the end 6a of the guide groove member 5 is introduced into the intermediate portion 6c of the guide groove formed with a narrow required width.

In such a configuration, the lower swinging apparatus of the hanging door of the present embodiment projects obliquely from the opening edge to the guide groove 6 at the end 6a of the guide groove 6, and the first guide 21 is formed into the guide groove 6. An inclined side wall 7 is provided that guides and prevents the second guide 22 and the first guide 21 from co-raising with the first guide 21 in contact with the second guide 22.
And the narrow neck part 23 is formed in the 1st guide 21, and the collar-like rail part 8 inserted in this narrow neck part 23 from the side and holding the 1st guide 21 is provided in the intermediate part 6c of the guide groove. .

As shown in FIG. 4, the first guide 21 is provided with sliding protrusions (not shown) at two opposing positions on the outer peripheral portion, and these sliding protrusions are formed in slit grooves (not shown) of the second guide 22. Each of them is inserted and engaged with the upper part of the second guide to cause the second guide 22 to follow up.
A magnet (not shown) is disposed at the top of the first guide 21, and a head 24 made of a magnetic material such as iron having a small diameter at the bottom is fixed. A narrow neck portion 23 is formed by the lower narrow diameter portion.
The second guide 22 is directly stored in the case 1, and the case 1 is installed on the floor via the outer case 1a.

In this case, the first guide 21 that is a guide pin for disposing the magnet can be formed of a molded product made of a magnetic material.
Specifically, as shown in FIG. 5 (a), the first guide 21 is configured by a hollow molded product by press or casting, and the magnet 25 is inserted into the hollow interior of the hollow molded product. As shown in FIGS. 5 (b) to 5 (d), the cross section is composed of a T-shaped molded product ((d) and (e) are general-purpose rivets). The magnet 25 can be inserted into the shaft portion.
Here, a pipe member 26 made of a non-magnetic metal such as aluminum or a synthetic resin is fitted into the shaft portion at the lower portion of the magnet 25 fitted into the shaft portion of the T-shaped molded product, and further, if necessary, a washer. 27, snap ring, push nut 28, etc. are used and supported together.
Thereby, the structure of the 1st guide 21 which is a guide pin which has arrange | positioned the magnet 25 to the front-end | tip part can be simplified, and the manufacturing cost can be made low.

On the other hand, as shown in FIG. 6, the suspension door body 4 is suspended from a ceiling rail via a runner (not shown) so that it can run freely. A guide groove member 5 into which the protruding guide pin 2 is inserted into the guide groove 6 is disposed.
The guide groove member 5 is provided with a magnet 9 that attracts the guide pin 2 only at the end portion 6a and the transition portion 6b of the guide groove 6.

As shown in FIG. 1, the guide groove member 5 is configured such that the first guide 21 projected by the magnetic force at the end portion 6a of the guide groove 6 is introduced into the intermediate portion 6c of the guide groove formed with a narrow required width. Yes.
In this case, in this embodiment, the bowl-shaped rail portion 8 of the intermediate portion 6 c of the guide groove is inserted into the narrow neck portion 23 of the first guide 21 by the movement of the suspension door body 4.
The transition portion 6b of the guide groove is a transition portion for smoothly transitioning the guide pin 2 from the end portion 6a of the guide groove to the intermediate portion 6c, and the groove width of the guide groove 6 is directed toward the intermediate portion 6c. It is formed so as to become gradually narrower.

As shown in FIG. 1 (c), the end portion 6a of the guide groove 6 protrudes obliquely into the guide groove 6 from the opening end edge thereof, guides the first guide 21 to the guide groove 6, and An inclined side wall 7 that abuts against the second guide 22 and prevents the second guide 22 from rising together with the first guide 21 into the guide groove 6 is provided.
The inclined side walls 7 are formed so that a pair of them face each other, and are formed in the same shape continuously in the longitudinal direction, and are provided to a position where the front portion of the second guide 22 reaches the rail portion 8. ing.

In this case, the magnet 9 disposed in the guide groove member 5 has magnetic poles of different polarities on the upper and lower surfaces as in the embodiment shown in FIG. 3A (in this embodiment, the upper surface is N The pole and lower surface are S poles, and can also be reversed.) A rod-shaped magnet 91 having a rectangular cross section, and the suspension door body 4 disposed on the end surface side of the suspension door body 4 in the moving direction of the rod-shaped magnet 91. A small piece magnet 92 having a rectangular cross section with magnetic poles of different polarities on both sides in the moving direction of the magnet 92, and this small piece magnet 92 is connected to the polarity (S It is arranged so that the surface of the polarity (N pole) different from that of the pole (pole) is located on the rod-shaped magnet 91 side (in this embodiment, it is placed in contact).
Thereby, the direction of the line of magnetic force of the magnet 9 provided in the guide groove member 5 at the end of the moving direction of the suspension door body 4 of the magnet 9 provided in the guide groove member 5 can be adjusted. The repulsive force is prevented from being generated between the magnet 9 arranged in the guide groove member 5 and the magnet arranged in the guide pin 2 by the action of the magnetic lines of force of the magnet 9 arranged in the groove member 5, and the guide pin 2 is securely connected. The guide pin 2 can be inserted into the guide groove member 5 installed in the suspension door body 4 by suction.

A ferrite magnet can be suitably used for the rod-shaped magnet 91, and a neodymium magnet can be suitably used for the small piece-shaped magnet 92.
As a result, the desired effect can be achieved while reducing the amount of expensive neodymium magnets used.

In addition, the magnet 9 disposed in the guide groove member 5 has magnetic poles having different polarities in the longitudinal direction as in the embodiment shown in FIGS. 3-1 (b) and FIG. The end of the door body 4 in the moving direction is the S pole and the center is the N pole, which can be reversed.) The rod-shaped magnet 9 is attracted to the magnet disposed on the guide pin 2. The magnet 9 disposed in the guide groove member 5 by the action of the magnetic lines of force of the magnet 9 disposed in the guide groove member 5 is arranged so that the magnetic pole side to be positioned is located on the end side in the moving direction of the suspension door body 4. The repulsive force is prevented from being generated between the magnets disposed on the guide pin 2, the guide pin 2 is reliably attracted, and the guide pin 2 is inserted into the guide groove member 5 installed in the suspension door body 4. can do.
In this case, the magnet 9 disposed in the guide groove member 5 is disposed horizontally, and as illustrated in FIG. 4, the magnet 9 is disposed so as to be inclined so that the end side in the moving direction of the suspension door body 4 is lowered. As a result, the guide pin 2 can be sucked more reliably.
Here, the guide pin 2 (N pole) attracted and attracted to the magnet 9 disposed in the guide groove member 5 is moved from the S pole position of the magnet 9 to the N pole position in accordance with the movement of the suspension door body 4. However, by providing the hook-shaped rail portion 8 at this position, the guide pin 2 can be held and the rail portion 8 can be smoothly transferred. Can do.

A ferrite magnet can be suitably used for the rod-shaped magnet 9.
As a result, the desired effect can be achieved without using expensive neodymium magnets.

By the way, in this embodiment, the guide groove member provided with the bowl-shaped rail portion 8 is used as the guide groove member at the center portion of the suspension door body 4, and the guide groove 6 is provided without providing the bowl-shaped rail portion 8. It is also possible to use the guide groove member 5 </ b> A in which the belt-like magnetic body 61 is disposed over the entire top surface of the steel plate via the support member 62.
Accordingly, the guide pin 2 is suspended from the rail portion 8 by attracting the guide pin 2 held by the bowl-shaped rail portion 8 to the magnetic body 61 by the magnet 25 disposed on the guide pin 2. It is possible to smoothly shift to the guide groove 6 of the guide groove member 5A at the center of the door main body 4.
In addition, by not providing the bowl-shaped rail portion 8 in the guide groove member 5A, even if there is an adsorption error or dropout of the guide pin 2, it can be easily re-adsorbed to the magnetic body 61, The suspension door can be guided stably.

Next, the operation of the lower swinging apparatus for the hanging door of this embodiment will be described.
When the suspension door main body 4 comes to a position above the floor surface installation member 3 installed on the floor surface, as shown in FIG. The head 9 of the first guide 21 is attracted by the magnet 9 disposed in 6a, and the first guide 21 and the second guide 22 that follows the first guide 21 protrude upward from the case 1.
In this case, since the inclined side wall 7 is provided at the end 6a of the guide groove 6, the first guide 21 is guided to the back of the guide groove 6 by the inclined surface, but the second guide 22 is the upper part thereof. Is in contact with the inclined side wall 7, so that even when the distance between the floor surface installation member 3 and the guide groove member 5 is short, the second guide 22 and the first guide 21 are prevented from co-raising with the first guide 21.
Then, when the suspension door body 4 moves, as shown in FIG. 1D, the narrow neck portion of the first guide 21 in a state where interference between the second guide 22 and the middle portion 6c of the guide groove is prevented. 23, the bowl-shaped rail portion 8 of the guide groove 6 is inserted from the side, and the guide pin 2 is held.
Thereby, the guide pin 2 can be reliably held even in the intermediate portion 6c of the guide groove where the magnet 9 that attracts the guide pin 2 does not exist.
When the suspension door body 4 leaves the position above the floor surface installation member 3 installed on the floor surface, the guide pins 2 (first guide 21 and second guide 22) retreat into the case 1 by gravity. .

Thus, the suspension door lower brace according to the present embodiment projects obliquely from the opening end edge into the guide groove 6 at the end 6a of the guide groove 6, and guides the first guide 21 to the guide groove 6. In addition, since the inclined side wall 7 is provided so as to abut against the second guide 22 and prevent the second guide 22 from rising together with the first guide 21 into the guide groove 6, the protruding height of the second guide 22 is set to the inclined side wall. 7, the interference between the second guide 22 and the intermediate portion 6c of the guide groove can be prevented by restricting the guide groove 6 below the predetermined position, whereby the guide groove member 5 and the floor surface installation member 3 can be prevented. Even if the distance to is short, only the first guide 21 can be reliably introduced into the middle portion 6c of the guide groove, and the suspension door can be stably guided.
Then, the narrow neck portion 23 is formed in the first guide 21, and the hook-shaped rail portion 8 that is inserted into the narrow neck portion 23 from the side to hold the first guide 21 is provided in the intermediate portion 6c of the guide groove. Even if there is no magnetic force at the intermediate portion 6c of the guide groove, the guide pin 2 can be reliably held and the suspension door can be stably guided.
Furthermore, the direction of the magnetic lines of force of the magnet 9 disposed in the guide groove member 5 at the end in the moving direction of the suspension door body 4 of the magnet 9 disposed in the guide groove member 5 can be adjusted. The repulsive force is prevented from being generated between the magnet 9 disposed on the guide groove member 5 and the magnet disposed on the guide pin 2 by the action of the magnetic lines of force of the magnet 9 disposed on the member 5, and the guide pin 2 is reliably attracted. Then, the guide pin 2 can be inserted into the guide groove member 5 installed in the suspension door body 4.

  Here, the configuration of the above-described suspension door lower swinging device is as shown in FIG. 4C by applying the magnetic force of the magnet 9 disposed in the guide groove member 5 to the middle portion 6c of the guide groove. The guide pin 2 that does not form the narrow neck portion 23 is used for the first guide 21, and the magnetic material is disposed over the entire top surface of the guide groove 6 without providing the rail portion 8 for the guide groove member 5. It can be applied to the lower swinging device of the hanging door, and the same effect can be obtained.

  As mentioned above, although it demonstrated based on the several Example about the lower swinging apparatus of the hanging door of this invention, this invention is not limited to the structure described in the said Example, The structure described in each Example The configuration can be changed as appropriate without departing from the spirit of the invention, for example, by appropriately combining them.

  The suspension door lower brace according to the present invention reliably sucks the guide pin so that the guide pin is inserted into a guide groove member installed in the suspension door body, or a magnet is disposed at the tip. Since the structure of the guide pin is simplified and its manufacturing cost can be reduced, the guide pin can be suitably used for a lower swinging device of a hanging door.

DESCRIPTION OF SYMBOLS 1 Case 2 Guide pin 21 1st guide 22 2nd guide 23 Narrow neck part (thin diameter part)
24 head 25 magnet 3 floor surface installation member 4 suspension door body 5 guide groove member 5A guide groove member 6 guide groove 6a end 6b transition part 6c intermediate part 61 magnetic body 7 inclined side wall 8 rail part 9 magnet 91 rod-shaped magnet 92 Small magnet

Claims (6)

  A case installed on the floor is provided with a floor installation member that houses a guide pin with a magnet disposed at the tip so that it can protrude upward, and a magnet that attracts the guide pin, and is attracted by the magnet. In the lower swinging device for a sliding door provided with a guide groove member installed in the suspension door body into which the guide pin is inserted, the magnet disposed in the guide groove member has a magnetic pole having a different polarity in the longitudinal direction. A lower part of a suspension door, characterized in that it is made of a rod-shaped magnet and is arranged so that the magnetic pole side attracted by the magnet arranged on the guide pin is located on the end side in the moving direction of the suspension door body Anti-rest device.   A saddle-like rail portion for holding the guide pin is provided at a position on the center side in the moving direction of the hanging door body where the magnet arranged on the guide pin receives the repulsive force from the rod-like magnet. The suspension door lower part rocking device according to claim 1.   3. The suspension door lower brace according to claim 1, wherein the bar-shaped magnet is disposed so as to be inclined so that an end portion in a moving direction of the suspension door main body is lowered.   A magnetic body is disposed over the entire top surface of the guide groove of the guide groove member in the center of the suspension door body, and the magnetic body is held on the bowl-shaped rail portion by a magnet disposed on the guide pin. 4. The suspension door lower swing prevention device according to claim 1, wherein the guide pin is adsorbed.   A case installed on the floor is provided with a floor installation member that houses a guide pin with a magnet disposed at the tip so that it can protrude upward, and a magnet that attracts the guide pin, and is attracted by the magnet. In the lower swinging device for a sliding door provided with a guide groove member installed in the suspension door body into which the guide pin is inserted, the magnets arranged in the guide groove member have magnetic poles of different polarities on the upper and lower surfaces. A bar-shaped magnet with a rectangular cross section and a small piece with a rectangular cross section having magnetic poles of different polarities on both sides in the moving direction of the suspension door body disposed on the end surface side of the suspension door body in the moving direction of the rod-shaped magnet The small piece magnet is arranged such that a surface having a polarity different from the polarity on the lower surface side of the rod-shaped magnet of the magnet is located on the rod-shaped magnet side. Bottom swing device.   6. The suspension door lower brace according to claim 5, wherein the rod-shaped magnet is made of a ferrite magnet, and the small piece-shaped magnet is made of a neodymium magnet.

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