A magnetic rod

Abstract

The present invention relates to a magnetic rod, which comprises a rod shell, at least one magnetic part and at least one connecting part. At least one magnetic part is arranged on the rod shell and is used to connect to other magnetic rods and / or connecting parts via magnetic force; at least one connecting part is arranged on the rod shell and can be staggered with the magnetic part to connect to other magnetic rods and / or connecting parts via cooperation between structures. The invention solves the problem that the existing magnetic rods and / or other connecting parts can only be connected by adsorption through magnets, resulting in insufficient firmness and poor stability of the spliced ​​shape.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic rods, in particular to a magnetic rod. Background Art

[0002] Magnetic sticks are a very popular magnetic building block toy. They consist of a stick and a magnet. The magnet has a magnetic force, allowing the stick to attach to magnetic metal surfaces, such as iron. This property allows sticks of different shapes to attract each other, or to attach to differently shaped connectors, such as iron balls.

[0003] For example, the patent application number CN202123165580.4 proposes a toy magnetic rod, in which an arc is formed by two arc-shaped grooves. The arc can fit tightly with the iron ball, and the magnet in the arc-shaped groove can be adsorbed on the iron ball. Due to the strong magnetism of the magnet and the cooperation of the arc-shaped groove, the magnetic rod and the iron ball are not easily displaced, so the assembled pattern is not easily deformed.

[0004] However, the existing magnetic bars and / or other connecting parts can only be connected by adsorption through magnets, and the assembled shape is not strong enough and has poor shape stability. Summary of the Invention

[0005] In view of this, it is necessary to provide a magnetic rod to solve the problem that the existing magnetic rods and magnetic rods and / or other connecting parts can only be connected by magnets to achieve adsorption between the two, resulting in insufficient firmness and poor stability of the spliced ​​shape.

[0006] The present invention provides a magnetic rod, comprising a rod shell, at least one magnetic portion and at least one connecting portion, wherein at least one magnetic portion is arranged on the rod shell and is used to connect to other magnetic rods and / or connecting pieces via magnetic force; at least one connecting portion is arranged on the rod shell and can be staggered with the magnetic portion and is used to connect to other magnetic rods and / or connecting pieces via cooperation between structures.

[0007] Furthermore, the magnetic part is fixedly arranged on the rod shell, and the connecting part is fixedly arranged on the rod shell and staggered with the magnetic part.

[0008] Furthermore, the connecting part is fixedly arranged on the rod shell, the magnetic part is slidably connected to the rod shell, and the magnetic part can slide to a first position and a second position. When the magnetic part is in the first position, the magnetic part covers the connecting part, and when the magnetic part is in the second position, the magnetic part and the connecting part are staggered.

[0009] Furthermore, the magnetic part includes a magnetic sleeve and a magnet, the magnet is embedded in the magnetic sleeve, and the magnetic sleeve is slidably connected to the rod shell. When the magnetic part is in the first position, the magnetic sleeve covers the connecting part, and the magnet is located outside the rod shell. When the magnetic part is in the second position, the magnetic sleeve and the connecting part are staggered, and the magnet is located inside the rod shell.

[0010] Furthermore, a stepped hole is provided on one side of the magnetic sleeve along its sliding direction, and an elastic buckle is installed on the inner wall of the magnetic sleeve, one side of the magnet is clamped against the stepped hole, and the other side of the magnet is clamped against the elastic buckle;

[0011] The side of the magnet away from the stepped hole is in contact with the elastic buckle via a magnetic sealing sheet.

[0012] Furthermore, the magnetic part further includes a limiting post, which is built into the rod shell. The magnetic sleeve is provided with a U-shaped groove, the extension direction of the U-shaped groove is the same as the sliding direction of the magnetic sleeve, and the limiting post is slidably connected to the U-shaped groove;

[0013] A slide rail is fixedly connected to the outer wall of the magnet sleeve. The extending direction of the slide rail is the same as the sliding direction of the magnet sleeve. The slide rail is slidably connected to a slide groove provided on the inner wall of the rod shell.

[0014] Furthermore, the connecting portion can be connected to other magnetic rods and / or connecting pieces via a connecting shaft.

[0015] Furthermore, a slot is provided on the connecting portion, and at least two buckles are provided on the connecting shaft, wherein one of the buckles is embedded in the slot on the connecting portion, and the other buckle is engaged with the slot provided on other magnetic rods and / or connecting parts.

[0016] Furthermore, a spline hole is provided on the connecting portion, and at least one spline is provided on the connecting shaft. One side of the spline is inserted into the spline hole on the connecting portion, and the other side of the spline is inserted into the spline hole provided on other magnetic rods and / or connecting parts.

[0017] Furthermore, the magnetic portion and / or the connecting portion can be installed at both ends of the rod housing and at any position on the side wall.

[0018] Compared with the prior art, the rod shell is the external structure of the magnetic rod, and the rod shell and other rod shells and / or at least one connecting piece can form a desired shape, wherein the rod shell provides support for the magnetic part and the connecting piece. By arranging at least one magnetic part on the rod shell, other magnetic rods and / or connecting pieces can be connected by magnetic force. The magnetic part can be set at a position where the shape is not under stress or is under less stress, and the connection is more convenient. At the same time, by arranging at least one connecting piece on the rod shell, and staggering it with the magnetic part, other magnetic rods and / or connecting pieces can be connected through cooperation between the structures. The connecting piece can be set at a position where the shape is under greater stress, and the connection is more stable, so as to improve the overall firmness of the shape and the shape has high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the magnetic rod provided by the present invention;

[0020] Figure 2 This is an overall exploded schematic diagram of an embodiment of the magnetic rod provided by the present invention;

[0021] Figure 3a A schematic structural diagram of a magnetic sleeve from a first perspective in an embodiment of a magnetic rod provided by the present invention;

[0022] Figure 3b A schematic structural diagram of a magnetic sleeve from a second perspective in an embodiment of a magnetic rod provided by the present invention;

[0023] Figure 3c A schematic structural diagram of a magnetic sleeve from a third perspective in an embodiment of a magnetic rod provided by the present invention;

[0024] Figure 3d A schematic structural diagram of a magnetic sleeve from a fourth perspective in an embodiment of a magnetic rod provided by the present invention;

[0025] Figure 4 A schematic structural diagram of two magnetic bars connected via a magnetic portion in one embodiment of the magnetic bar provided by the present invention;

[0026] Figure 5 A schematic structural diagram of a magnetic rod and a magnetic sheet connected via a magnetic portion in an embodiment of the magnetic rod provided by the present invention;

[0027] Figure 6 A schematic structural diagram of a magnetic rod and a magnetic ball connected via a magnetic portion in an embodiment of the magnetic rod provided by the present invention;

[0028] Figure 7 A schematic structural diagram of a magnetic rod and a connecting member connected via a connecting portion in an embodiment of the magnetic rod provided by the present invention;

[0029] Figure 8This is a structural diagram of two magnetic bars connected by a connecting portion in an embodiment of the magnetic bar provided by the present invention;

[0030] Figure 9 A schematic structural diagram of a magnetic rod and a magnetic sheet connected via a connecting portion in an embodiment of the magnetic rod provided by the present invention;

[0031] Figure 10 A schematic structural diagram of a magnetic rod and a connecting rod connected via a connecting portion in an embodiment of the magnetic rod provided by the present invention;

[0032] Figure 11 A schematic structural diagram of a magnetic rod and a connecting ball connected via a connecting portion in an embodiment of the magnetic rod provided by the present invention;

[0033] Figure 12a A schematic structural diagram of a magnetic rod in a straight line according to an embodiment of the present invention;

[0034] Figure 12b A schematic structural diagram of an embodiment of a magnetic rod provided by the present invention, in which the shorter magnetic rod is in an arc shape;

[0035] Figure 12c A schematic structural diagram of a magnetic rod of medium length in an arc shape in one embodiment of the magnetic rod provided by the present invention;

[0036] Figure 12d A schematic structural diagram of an embodiment of a magnetic rod provided by the present invention, in which the longer magnetic rod is in an arc shape;

[0037] Figure 13a This is a structural schematic diagram of a three-way magnetic rod in one embodiment of the magnetic rod provided by the present invention;

[0038] Figure 13b A schematic structural diagram of a four-way magnetic rod in one embodiment of the magnetic rod provided by the present invention;

[0039] Figure 13c This is a structural schematic diagram of a six-way magnetic rod in one embodiment of the magnetic rod provided by the present invention;

[0040] Figure 13d A schematic structural diagram of an eight-way magnetic rod in one embodiment of the magnetic rod provided by the present invention;

[0041] Figure 14 This is a schematic diagram of the connection between magnetic bars of different shapes in one embodiment of the magnetic bar provided by the present invention. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0043] like Figure 1-2 As shown, a magnetic rod in this embodiment includes a rod shell 100, at least one magnetic part 200 and at least one connecting part 300. The at least one magnetic part 200 is provided on the rod shell 100 for connecting to other magnetic rods and / or connecting parts through magnetic force; the at least one connecting part 300 is provided on the rod shell 100 and can be staggered with the magnetic part 200 for connecting to other magnetic rods and / or connecting parts through cooperation between the structures.

[0044] Among them, the rod shell 100 is the external structure of the magnetic rod, and the rod shell 100 and other rod shells 100 and / or at least one connecting piece can form a desired shape. Among them, the rod shell 100 provides support for the magnetic part 200 and the connecting part 300. By arranging at least one magnetic part 200 on the rod shell 100, other magnetic rods and / or connecting pieces can be connected by magnetic force. The magnetic part 200 can be set at a position where there is no force or a small force on the shape, and the connection is more convenient. At the same time, by arranging at least one connecting part 300 on the rod shell 100, and staggering it with the magnetic part 200, other magnetic rods and / or connecting pieces can be connected through cooperation between the structures. The connecting part 300 can be set at a position where the shape is subjected to greater force, and the connection is more stable, so as to improve the overall firmness of the shape and the shape stability.

[0045] In some embodiments, the rod shell 100 is the external structure of the magnetic rod, and the rod shell 100 provides support for the magnetic part 200 and the connecting part 300.

[0046] In this embodiment, the rod housing 100 includes a first shell 110 and a second shell 120. The first shell 110 and the second shell 120 are symmetrical structures. The first shell 110 and the second shell 120 are recessed inward on opposite sides. The first shell 110 and the second shell 120 are seamlessly connected to form a cavity for mounting the magnetic part 200 and the connecting part 300.

[0047] In order to facilitate seamless connection between the first shell 110 and the second shell 120 , in this embodiment, a positioning pin 111 is provided on the first shell 110 and a positioning hole 121 is provided on the second shell 120 . When the first shell 110 and the second shell 120 are connected, the positioning pin 111 can be inserted into the positioning hole 121 .

[0048] In this embodiment, ultrasonic lines 130 are provided at the edges of opposing sides of the first housing 110 and the second housing 120, and the first housing 110 and the second housing 120 are connected by ultrasonic welding along the ultrasonic lines 130. It should be noted that the connection method between the first housing 110 and the second housing 120 is not limited in this embodiment of the present invention. For example, screws or the like can be used to achieve a detachable connection between the first housing 110 and the second housing 120.

[0049] In some embodiments, magnetic portion 200 is a structure in which a magnetic rod is connected to other components (other magnetic rods or connectors) through magnetic force. The magnetic rod is connected to other magnetic rods through magnetic portion 200, that is, at least two magnetic rods are connected through magnetic portion 200, and the magnetic rod is connected to the connector through magnetic portion 200. The connector includes iron balls, magnetic sheets, etc., which are used to assemble the structure into a shape. Using magnetic force to connect two adjacent components is suitable for locations in the shape that are not subject to stress or are subject to low stress.

[0050] In some embodiments, the connecting portion 300 can be connected to other magnetic rods and / or connectors through inter-structural coordination. The inter-structural coordination described above refers to the coordination between physical objects, such as the coupling 410 and the slot, the spline and the spline hole, or the screw and the threaded hole. This connection method provides good connection stability and is suitable for locations where the shape is subjected to greater stress, thereby improving the overall firmness of the shape and enhancing the shape stability.

[0051] In summary, the magnetic rods can be connected to other magnetic rods and / or connectors through either the magnetic portion 200 or the connector 300, depending on the size of the external force that the connection needs to bear.

[0052] In some embodiments, the magnetic portion 200 and the connecting portion 300 on the magnetic rod can be set at different positions on the rod shell 100, or the magnetic portion 200 and the connecting portion 300 on the magnetic rod can be set at the same position on the rod shell 100 to achieve a variety of connection methods, which are described below with different embodiments.

[0053] In the first embodiment, the magnetic part 200 and the connecting part 300 are arranged at different positions on the stick housing 100. Specifically, the magnetic part 200 is fixedly arranged on the stick housing 100, and the connecting part 300 is fixedly arranged on the stick housing 100 and staggered with the magnetic part 200.

[0054] In the second embodiment, the magnetic portion 200 and the connecting portion 300 are disposed at the same position on the stick housing 100. Specifically, the connecting portion 300 is fixedly disposed on the stick housing 100, and the magnetic portion 200 is slidably connected to the stick housing 100. The magnetic portion 200 can slide between a first position and a second position. When the magnetic portion 200 is in the first position, the magnetic portion 200 covers the connecting portion 300. When the magnetic portion 200 is in the second position, the magnetic portion 200 and the connecting portion 300 are offset. The sliding movement of the magnetic portion 200 relative to the stick housing 100 enables switching between the magnetic portion 200 and the connecting portion 300.

[0055] like Figure 2 As shown, to facilitate the sliding movement of the magnetic portion 200 relative to the rod housing 100, in this embodiment, the magnetic portion 200 includes a magnetic sleeve 210 and a magnet 220. The magnet 220 is embedded in the magnetic sleeve 210 and is slidably connected to the rod housing 100. When the magnetic portion 200 is in a first position, the magnetic sleeve 210 covers the connecting portion 300, and the magnet 220 is located outside the rod housing 100. When the magnetic portion 200 is in a second position, the magnetic sleeve 210 and the connecting portion 300 are offset, and the magnet 220 is located inside the rod housing 100. The sliding movement of the magnetic sleeve 210 relative to the rod housing 100 can drive the magnet 220 to slide relative to the housing.

[0056] like Figure 3a 、 Figure 3b 、 Figure 3c as well as Figure 3d As shown, in order to facilitate the installation of the magnet 220 on the magnetic sleeve 210, in this embodiment, a stepped hole 211 is provided on one side of the magnetic sleeve 210 along its sliding direction, and an elastic buckle 213 is installed on the inner wall of the magnetic sleeve 210. One side of the magnet 220 is stuck in contact with the stepped hole 211, and the other side of the magnet 220 is stuck in contact with the elastic buckle 213.

[0057] In order to improve the magnetic attraction effect of the magnet 220, in this embodiment, the side of the magnet 220 away from the stepped hole 211 is abutted against the elastic buckle 213 via a magnetic sealing sheet 221. The magnetic sealing sheet 221 can shield the magnetic field on one side of the magnet 220, thereby enhancing the magnetic field of the magnet 220 pointing to the stepped hole 211.

[0058] The magnet 220 can be connected to the stepped hole 211 in a stepped shape. Meanwhile, the magnetic sealing sheet 221 is made of a magnetic conductive material, such as iron.

[0059] In order to facilitate limiting the sliding direction of the magnetic sleeve 210, in this embodiment, the magnetic part 200 further includes a limiting post 230, which is built into the rod shell 100. A U-shaped groove 212 is provided on the magnetic sleeve 210. The extension direction of the U-shaped groove 212 is the same as the sliding direction of the magnetic sleeve 210, and the limiting post 230 is slidably connected to the U-shaped groove 212.

[0060] Among them, the limiting column 230 cooperates with the screw to strengthen the connection between the first shell 110 and the second shell 120. Specifically, the limiting column 230 is fixed to the second shell 120, and the screw passes through the threaded hole opened on the first shell 110 and is threadedly connected to the limiting column 230.

[0061] In order to make the sliding of the magnetic sleeve 210 more stable, in this embodiment, a slide rail 214 is fixedly connected to the outer wall of the magnetic sleeve 210. The extension direction of the slide rail 214 is the same as the sliding direction of the magnetic sleeve 210. The slide rail 214 is slidably connected to the slide groove 140 opened on the inner wall of the rod shell 100.

[0062] Of course, in other preferred embodiments, other structures may be used to replace the limiting posts 230 and the slide rails 214 to limit the sliding direction of the magnetic sleeve 210 , and this is not limited in the embodiment of the present invention.

[0063] In some embodiments, the magnetic part 200 and / or the connecting part 300 can be installed at both ends of the stick housing 100 and at any position on the side wall, that is, the installation positions of the magnetic part 200 and the connecting part 300 are not limited.

[0064] In this embodiment, a magnetic portion 200 and a connecting portion 300 are provided at both ends of the stick case 100. The magnetic portions 200 located at both ends of the stick case 100 can slide to a first position and a second position relative to the stick case 100, thereby realizing switching between the magnetic portions 200 and the connecting portion 300 at both ends of the stick case 100. At the same time, a magnetic portion 200 and a connecting portion 300 are staggeredly provided on the side wall of the stick case 100, and the magnetic portion 200 and the connecting portion 300 located on the side wall of the stick case 100 are both fixedly connected relative to the stick case 100.

[0065] In summary, the positions and quantities of the magnetic portion 200 and the connecting portion 300 are set accordingly according to the required shape of the structure.

[0066] like Figure 4 As shown, in the third embodiment, one end of a magnetic bar is connected to one end of another magnetic bar via a magnetic portion 200 .

[0067] like Figure 5 As shown, in the fourth embodiment, one end of the magnetic rod is connected to the magnetic sheet via the magnetic portion 200 .

[0068] like Figure 6 As shown, in the fifth embodiment, one end of each of the plurality of magnetic rods is connected to the magnetic ball via the magnetic portion 200 .

[0069] like Figure 7 As shown, in order to facilitate the connection of the magnetic rod with other magnetic rods and / or connectors via the connecting portion 300, the connecting portion 300 can be connected to the other magnetic rods and / or connectors via a connecting shaft 400. It should be noted that the connecting shaft 400 is the connecting structure between the connecting portion 300 and the other magnetic rods and / or connectors, and is described below with reference to embodiments.

[0070] In the sixth embodiment, a slot is provided on the connecting portion 300, and at least two buckles 410 are provided on the connecting shaft 400, wherein one buckle 410 is embedded in the slot on the connecting portion 300, and the other buckle 410 is engaged with the slot provided on other magnetic rods and / or connecting parts.

[0071] In the seventh embodiment, a spline hole is opened on the connecting part 300, and at least one spline is provided on the connecting shaft 400. One side of the spline is inserted into the spline hole on the connecting part 300, and the other side of the spline is inserted into the spline hole opened on other magnetic rods and / or connecting parts.

[0072] Of course, in other preferred embodiments, the connection between the connecting portion 300 and the connecting shaft 400 can also be replaced by other structures, preferably with a stable connection and easy disassembly. The following describes the connection between the connecting portion 300 and the connecting shaft 400 using a specific embodiment.

[0073] like Figure 8 As shown, in the eighth embodiment, the two magnetic bars are connected via a connecting shaft 400 , and both ends of the connecting shaft 400 are detachably connected to the connecting portions 300 of the two magnetic bars.

[0074] like Figure 9 As shown, in the ninth embodiment, the magnetic rod and the magnetic sheet are connected via a connecting shaft 400, one end of the connecting shaft 400 is connected to the connecting portion 300 on the magnetic rod, and the other end of the connecting shaft 400 is connected to the connecting portion 300 provided on the magnetic sheet.

[0075] like Figure 10 As shown, in the tenth embodiment, the magnetic rod and the connecting rod are connected via a connecting shaft 400, one end of the connecting shaft 400 is connected to the connecting portion 300 on the magnetic rod, and the other end of the connecting shaft 400 is connected to the connecting portion 300 provided on the connecting rod.

[0076] like Figure 11As shown, in the eleventh embodiment, the magnetic rod and the porous ball are connected by a connecting shaft 400, one end of the connecting shaft 400 is connected to the connecting portion 300 on the magnetic rod, and the other end of the connecting shaft 400 is connected to the connecting portion 300 provided on the porous ball.

[0077] In order to facilitate controlling the depth of the connecting shaft 400 inserted into the connecting portion 300 , in this embodiment, an abutting plate 420 is provided at the middle portion of the connecting shaft 400 .

[0078] It should be noted that the size and shape of the magnetic rod are not limited. For example, Figure 12a The linear magnetic rod can also be used as Figure 12b 、 Figure 12c and Figure 12d Of course, as shown in the figure, the length of the arc-shaped magnetic rod can be set accordingly. At the same time, the shape of the magnetic rod can be as follows: Figure 13a The three-way magnetic rod shown, Figure 13b The four-way magnetic rod shown, Figure 13c The six-way magnetic rod shown and Figure 13d The shape of the eight-way magnetic rod shown is not limited. Figure 14 As shown, it is a schematic diagram of the connection between magnetic bars of different shapes.

[0079] Compared with the prior art: the rod shell 100 is the external structure of the magnetic rod, and the rod shell 100 and other rod shells 100 and / or at least one connecting piece can form a desired shape, wherein the rod shell 100 provides support for the magnetic part 200 and the connecting part 300. By arranging at least one magnetic part 200 on the rod shell 100, other magnetic rods and / or connecting pieces can be connected by magnetic force. The magnetic part 200 can be set at a position where the shape is not stressed or is subjected to less stress, and the connection is more convenient. At the same time, by arranging at least one connecting part 300 on the rod shell 100, and staggering it with the magnetic part 200, other magnetic rods and / or connecting pieces can be connected through cooperation between the structures. The connecting part 300 can be set at a position where the shape is subjected to greater stress, and the connection is more stable, so as to improve the overall firmness of the shape and the shape has high stability.

[0080] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A magnetic rod, characterized in that: comprising a rod shell, at least one magnetic portion and at least one connecting portion; At least one magnetic portion is provided on the rod housing for connecting to other magnetic rods and / or connectors via magnetic force; At least one of the connecting parts is provided on the rod shell and can be staggered with the magnetic part to connect to other magnetic rods and / or connecting parts through cooperation between the structures; The connecting portion is fixedly arranged on the rod shell, and the magnetic portion is slidably connected to the rod shell. The magnetic portion can slide to a first position and a second position. When the magnetic portion is in the first position, the magnetic portion covers the connecting portion. When the magnetic portion is in the second position, the magnetic portion and the connecting portion are staggered. The magnetic part includes a magnetic sleeve and a magnet, the magnet is embedded in the magnetic sleeve, and the magnetic sleeve is slidably connected to the rod shell. When the magnetic part is in a first position, the magnetic sleeve covers the connecting portion, and the magnet is located outside the rod shell. When the magnetic part is in a second position, the magnetic sleeve and the connecting portion are staggered, and the magnet is located inside the rod shell. A stepped hole is provided on one side of the magnetic sleeve along its sliding direction, and an elastic buckle is installed on the inner wall of the magnetic sleeve. One side of the magnet abuts against the stepped hole, and the other side of the magnet abuts against the elastic buckle; The side of the magnet away from the stepped hole is in contact with the elastic buckle via a sealing magnetic sheet; The magnetic part further includes a limiting post, which is built into the rod shell. The magnetic sleeve is provided with a U-shaped groove, the extension direction of the U-shaped groove is the same as the sliding direction of the magnetic sleeve, and the limiting post is slidably connected to the U-shaped groove; A slide rail is fixedly connected to the outer wall of the magnet sleeve. The extending direction of the slide rail is the same as the sliding direction of the magnet sleeve. The slide rail is slidably connected to a slide groove provided on the inner wall of the rod shell.

2. The magnetic rod according to claim 1, characterized in that The connecting portion can be connected to other magnetic rods and / or connecting pieces via a connecting shaft.

3. The magnetic rod according to claim 2, characterized in that The connecting portion is provided with a slot, and the connecting shaft is provided with at least two buckles, one of which is embedded in the slot on the connecting portion, and the other buckle is engaged with the slot provided on other magnetic rods and / or connecting pieces.

4. The magnetic rod according to claim 2, characterized in that A spline hole is provided on the connecting portion, and at least one spline is provided on the connecting shaft. One side of the spline is inserted into the spline hole on the connecting portion, and the other side of the spline is inserted into the spline hole provided on other magnetic rods and / or connecting parts.

5. The magnetic rod according to claim 1, characterized in that The magnetic part and / or the connecting part can be installed at both ends of the rod housing and at any position on the side wall.

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