JP3184852U - Shaft hole type magnetic joint - Google Patents

Abstract

Provided is a shaft hole type magnetic joint capable of realizing a joint mechanism having sufficient mobility and high connection strength when used as a joint part of a toy or the like while having a light and simple structure. .
A shaft hole type magnet joint 1 is composed of magnets 2 and 3 having the same shape and having a disk shape or a column shape, and a shaft body 4 made of a nonmagnetic metal material. The magnets 2 and 3 have shaft holes 2a and 3a concentrically penetrating with the central shaft 9, respectively, so that the attracting surfaces 2b and 2c and attracting surfaces 3b and 3c constituting the magnetic pole are orthogonal to the shaft holes 2a and 3a. Each is provided.
[Selection] Figure 1

Description

  The present invention relates to a magnetic joint used for a joint part of a toy, and in particular, when embedded in a joint part of a toy etc., a shaft hole that can realize a natural and smooth joint movement without losing the connection strength. Relates to a magnetic joint.

Conventionally, a joint portion of a toy has a structure that has mobility and can be easily attached and detached by connecting members that can be fitted or locked to each other. However, the connection strength of joints and the like was insufficient for children to use for play, such as one member being easily dropped by a slight impact.
Thus, in recent years, various studies and developments have been conducted on the use of magnets and magnetic materials for joint portions in order to increase the connection strength, and some ideas have already been disclosed in this regard.

For example, Patent Document 1 discloses a device related to a doll joint device having a magnet and a magnetic body under the name “doll joint device”.
The contrivance disclosed in Patent Document 1 is a doll having movable side parts such as upper limbs and lower limbs connected to the torso. A female part and a male part that are fitted so as to be rotatable and removable, an engagement concave part and an engagement convex part that are fitted over the peripheral wall of the female part and the peripheral wall of the male part, and a bottom face and a male part of the female part. It has the magnet and magnetic body which mutually adsorb | suck to a front end surface, It is characterized by the above-mentioned.
In the doll joint device having such a structure, the attachment state is maintained by the adsorption of the magnet and the magnetic body. Therefore, when an external force in the rotation direction is applied to the connecting shaft, the male part rotates in the female part. When an undulating external force is applied to the movable side portion, the movable side portion and the connecting shaft are bent or straightened. Further, when a force in the pulling direction is applied, the adsorption of the magnet and the magnetic body is released, and the male part and the female part are separated. Therefore, it is possible to arbitrarily remove the movable side portion, and the direction of the movable side portion does not naturally change due to vibration or external force. Furthermore, the assembly work at the time of manufacture is easy.

Patent Document 2 discloses a device related to a robot toy with the name “robot toy” that eliminates anxiety of the connection of the sub block to the main block.
The device disclosed in Patent Document 2 is composed of a main block and a plurality of types of sub blocks, and is a female type that can be inserted into and removed from a predetermined portion of the main block and a predetermined portion of each sub block. A male joint is provided, and a magnet and a magnetic body are provided in such a state that they are attracted to each other with respect to the female and male joints.
In the robot toy having such a structure, the sub block is attached to and detached from the main block by inserting and connecting the female joint and the male joint or by removing the male joint from the female joint. Therefore, the sub block can be fixed twice by inserting the male joint and attracting the magnet and the magnetic body. In addition, since the female and male joints are rotatable relative to each other, the orientation of the sub-block can be arbitrarily changed.

Japanese Utility Model Publication No. 4-67492 Japanese Utility Model Publication No. 6-48788

  In the device disclosed in Patent Document 1, it is considered that the magnetic force of the magnet is not so strong because the iron plate, which is a magnetic material, has mobility with respect to the magnet. In this case, there is a high possibility that the iron plate easily falls off the magnet due to the impact from the side. Further, since the magnet is built in the entire body, it is difficult to reduce the weight.

  Further, in the device disclosed in Patent Document 2, since the female / male joint, and the magnet and the magnetic body are simply inserted and removed and magnetically attracted, respectively, the same as the device disclosed in Patent Document 1 In addition, there is a high possibility that the sub block is easily dropped from the main block due to the impact from the side.

  The present invention has been made in response to such a conventional situation, and has sufficient mobility and high connection strength when used as a joint part of a toy etc. while having a light and simple structure. An object of the present invention is to provide a shaft hole type magnetic joint capable of realizing a joint mechanism.

In order to achieve the above object, a shaft hole type magnet joint according to claim 1 is inserted into both a pair of magnets each having a shaft hole orthogonal to the attracting surface and the shaft hole. The pair of magnets is characterized in that the shaft body is rotatably inserted into at least one of the shaft holes and is formed so that the attracting surfaces can be brought into contact with each other.
In the shaft hole type magnet joint having such a structure, each set of magnets has a shaft hole orthogonal to the attracting surface, so that the shaft body is inserted into both of the shaft holes. The attracting surfaces face each other in parallel, and the magnets are attracted. At this time, the strong attractive force generated between the two acts so as not to separate the pair of magnets from each other in the X direction.
Further, since the shaft body has a bending strength of a certain level or more, the parallel state of the pair of magnets is strongly maintained by being inserted into the shaft hole. However, when a separation force greater than the attraction force is applied, the magnets are separated from each other.
In addition, since the pair of magnets is rotatably inserted into at least one of the shaft holes, the magnets are rotatable with respect to each other. At this time, the attracting force generated between the attracting surfaces of the pair of magnets acts as a resistance against the rotation of the magnets to some extent, and therefore a force that rotates the pair of magnets around the shaft body acts. The magnet rotates only when it is present.
Furthermore, since the shaft body is rotatably inserted into at least one of the shaft holes, the pair of magnets is a case where the shaft body is fixed to the shaft hole of one magnet so as not to rotate. However, the other magnet is rotatable.

The invention according to claim 2 is the shaft hole type magnet joint according to claim 1, wherein at least one of the shaft holes is a through hole, and the shaft body makes the attraction surfaces of a pair of magnets contact each other. In this state, the end portion protrudes from the through hole.
In the shaft hole type magnet joint having such a structure, in addition to the operation of the device of claim 1, the shaft body is installed with the end portion protruding from the through hole. In addition to the suction force, the shaft body supports the contact state. Therefore, even when a force is applied from a direction other than the longitudinal direction of the shaft body, displacement and detachment of the magnet attracting surfaces are prevented.

According to a third aspect of the present invention, in the shaft hole type magnetic joint according to the first or second aspect, the shaft body is a non-magnetic body.
In the shaft hole type magnetic joint having such a structure, in addition to the operation of the device according to claim 1 or 2, the shaft body is a non-magnetic body and is not attracted to each magnet. There is no risk of obstruction. In addition, when inserting or removing the shaft body from both shaft holes, the shaft body is not attracted to the vicinity of the edge of the magnet shaft hole. Is easy.

As described above, according to the shaft hole type magnet joint according to claim 1 of the present invention, a strong attracting force is provided between the magnets by providing the shaft body that is inserted into both of the shaft holes. Can be generated. For this reason, when the shaft hole type magnetic joint is used for a shoulder joint portion of a robot toy or the like, for example, the magnets can be rotated with each other without the arm falling off the shoulder portion. Thereby, a natural and smooth movement of the shoulder joint can be realized. Moreover, since the rotated magnet can be fixed at an arbitrary position, the robot toy or the like can be maintained in a desired posture for a long time. In addition, as a magnet used for this invention, what has desired magnetic force and durability can be suitably selected according to a use.
Furthermore, the shaft hole type magnet joint described in the present claim is composed of a magnet having a shaft hole and a shaft body, and has a light and simple structure. Therefore, it can be embedded in small joint parts such as toys, and processing at that time is easy. In addition, since many kinds of magnets are distributed in large quantities on the market, it is possible to easily obtain a product having a desired size and attractive force at a low cost. Therefore, the manufacturing cost can be kept low.

According to the shaft hole type magnet joint according to claim 2 of the present invention, in addition to the effect of the device according to claim 1, the shaft body prevents displacement and detachment of the attracting surfaces of the pair of magnets. Therefore, the magnets can be stably maintained so as to be rotatable relative to each other. Further, since the end of the shaft body protrudes from the through hole, the shaft body is unlikely to be detached from the shaft hole, so that the tip periphery of the shaft body is not easily worn. Therefore, the life of the shaft hole type magnetic joint can be extended.
If the shaft hole is a through hole, the manufacturing cost can be further reduced because the processing is easier than in the case of the bottomed hole.

  According to the shaft hole type magnet joint according to claim 3 of the present invention, in addition to the effect of the device according to claim 1 or 2, the pair of magnets can be smoothly rotated. When embedded in a joint such as a toy, it is possible to enjoy the complicated movements of the limbs without stress. Further, since the shaft body can be quickly inserted into the shaft hole of the magnet, the shaft hole type magnetic joint can be easily assembled or disassembled in a short time.

(A) is a side view of the Example of the shaft hole type magnet joint which concerns on embodiment of this invention, (b) is a front view of a magnet. (A) is a perspective view which shows the state by which the axial hole type magnetic joint of FIG. 1 was assembled, (b) is sectional drawing which shows the use condition. It is a perspective view which shows the usage example of the shaft hole type magnet joint of FIG. It is a perspective view which shows the usage example of the shaft hole type magnet joint of FIG.

Examples of the shaft hole type magnetic joint according to the embodiment of the present invention will be described in detail with reference to FIGS. The components shown in FIG. 1 are denoted by the same reference numerals in FIGS. 2 to 4 and description thereof is omitted.
Fig.1 (a) is a side view of the shaft hole type magnet joint of a present Example, FIG.1 (b) is a front view of a magnet.

As shown in FIGS. 1 (a) and 1 (b), a shaft hole type magnetic joint 1 is composed of a magnet 2 and 3 having a disk shape or a columnar shape, and a shaft body made of a nonmagnetic metal material. 4. The magnets 2 and 3 have shaft holes 2a and 3a concentrically penetrating with the central shaft 9, respectively, so that the attracting surfaces 2b and 2c and attracting surfaces 3b and 3c constituting the magnetic pole are orthogonal to the shaft holes 2a and 3a. Each is provided.
Further, the shaft hole 2a and the shaft hole 3a have the same diameter, and the cylindrical shaft body 4 is smaller in diameter than the shaft holes 2a and 3a and rotates in a state of being inserted into the shaft holes 2a and 3a. It is formed freely.
Table 1 shows the sizes of the magnets 2 and 3 in this embodiment. The length of the shaft body 4 is about 5 to 10 mm.

Next, the usage method of the shaft hole type magnetic joint 1 is demonstrated in detail using FIG. 2A and 2B are a perspective view showing a state where the shaft hole type magnetic joint 1 is assembled and a cross-sectional view showing a state where the shaft hole type magnetic joint 1 is embedded in an object. FIG. 2B shows a state in which the object and the shaft hole type magnetic joint 1 are cut along a plane including the central axis 9.
As shown in FIG. 2 (a), in the shaft hole type magnet joint 1, the magnets 2 and 3 bring the attracting surfaces 2c and 3b into contact with each other, and the shaft body 4 is opposed to the shaft holes 2a and 3a. , 4b are formed so that they can be inserted in a state of protruding from the suction surfaces 2b, 3c.
Here, the axial direction of the shaft body 4 is defined as the X direction, and the circumferential direction with respect to the axial center is defined as the θ direction. At this time, the magnets 2 and 3 are slidable in the X direction with respect to the shaft body 4 and are rotatable in the ± θ directions.

  As shown in FIG. 2B, the shaft hole type magnet joint 1 is used by being entirely embedded in a joint 5 composed of a fixing member 5a and a rotating member 5b. The opposing surfaces of the fixed member 5a and the rotating member 5b are parallel to each other, the fixing member 5a is formed with an insertion hole 5c for embedding one end of the magnet 2 and the shaft body 4, and the rotating member 5b has the magnet 3 And the insertion hole 5d for embedding the other end of the shaft body 4 is formed. The end faces 4a and 4b of the shaft body 4 and the side surfaces in the vicinity thereof are coated with an adhesive and bonded to the insertion holes 5c and 5d.

In the shaft hole type magnetic joint 1 having such a structure, since the attracting surface 2c and the attracting surface 3b are in contact with each other, a strong attracting force is generated between them. This prevents the magnets 2 and 3 from separating in the X direction.
On the other hand, the attracting force between the attracting surfaces 2c and 3b does not effectively act in the θ direction, so that the rotation of the magnets 2 and 3 with respect to the shaft body 4 is not prevented. That is, the suction surfaces 2 c and 3 b rotate independently with respect to the shaft body 4. However, since the attraction force between the attraction surfaces 2c and 3b is somewhat resistant to the rotation of the magnets 2 and 3, if the force to rotate the magnets 2 and 3 in the θ direction is lost, the magnet 2 3 immediately stops turning.
As described above, the shaft hole type magnet joint 1 has an effect that the magnets 2 and 3 are easily rotated around the shaft body 4 while maintaining the attracting states of the attracting surfaces 2c and 3b. When the rotation of the magnets 2 and 3 is stopped, the positional relationship between the magnets 2 and 3 is maintained as it is.

Further, since the end surfaces 4a and 4b of the shaft body 4 protrude from the shaft holes 2a and 3a, the magnets 2 and 3 can be in contact with the attracting surfaces 2c and 3b by the shaft body 4 in addition to the above-described attracting force. Maintained. That is, unlike the case where the end faces 4a, 4b of the shaft body 4 do not protrude from the shaft holes 2a, 3a, in the shaft hole type magnet joint 1, force is applied to the magnets 2, 3 from directions other than the X direction. Even in this case, since the attracting surfaces 2c and 3b are not easily displaced, the magnets 2 and 3 are not easily detached from the shaft body 4.
Furthermore, the shaft body 4 has the same diameter as the shaft holes 2a and 3a and is formed of a nonmagnetic metal material. Slides smoothly. Furthermore, when inserting or extracting from the shaft holes 2a and 3a, the shaft body 4 is not likely to be adsorbed near the end edges of the shaft holes 2a and 3a.

When the shaft hole type magnetic joint 1 that exhibits the above action is embedded in the joint 5, the rotating member 5 b is hardly detached from the fixed member 5 a due to the adsorption of the magnet 2 and the magnet 3. This action is further exhibited because the end surfaces 4a and 4b of the shaft body 4 and the side surfaces in the vicinity thereof are bonded to the insertion holes 5c and 5d.
On the other hand, when a force is applied to the rotating member 5b to rotate the fixing member 5a, the magnets 2 and 3 rotate about the shaft body 4 while maintaining the attracting surfaces 2c and 3b. Thereby, the rotation member 5b rotates smoothly with respect to the fixed member 5a. When the rotation of the rotation member 5b is stopped, the positional relationship between the rotation member 5b and the fixing member 5a is maintained as it is.

Next, a modification of the method of using the shaft hole type magnetic joint 1 will be described in detail with reference to FIG. FIG. 3 is a perspective view showing an example of use of the shaft hole type magnetic joint 1.
As shown in FIG. 3, the shaft hole type magnet joint 1 is used by being entirely embedded in a joint 6 composed of a fixed member 6a and a rotating member 6b. The fixing member 6a and the rotating member 6b are made of synthetic resin and have a structure that can be easily processed with a tool. Therefore, when embedding the shaft hole type magnet joint 1, first, the insertion holes 6c and 6d are formed using an appropriate tool. Next, the magnet 2 and the shaft body 4 are fitted into the insertion hole 6c, and after the magnet 3 is fitted into the insertion hole 6d, the shaft body 4 is inserted into the shaft hole 3a. As a result, the shaft hole type magnet joint 1 is embedded in the joint 6. However, the procedure for embedding the shaft hole type magnetic joint 1 in the joint 6 is not limited to this.
Further, if any one of the shaft hole 2a and the shaft body 4 or the shaft hole 3a and the shaft body 4 is rotatable, the rotation member 6b can be rotated in the ± θ direction. In the present embodiment, the end surfaces 4a and 4b are bonded to the insertion holes 6c and 6d. However, the present invention is not limited to this. For example, the peripheral surfaces 2d and 3d of the magnets 2 and 3 and the attracting surfaces 2b and A structure in which 3c is bonded to the insertion holes 6c and 6d may be used.

Furthermore, the modification of the usage method of the shaft hole type magnet joint 1 is demonstrated in detail using FIG. FIG. 4 is a perspective view showing an example of use of the shaft hole type magnetic joint.
As shown in FIG. 4, the shaft hole type magnetic joint 1 is embedded in the shoulder joint portion 8 of the robot toy 7. However, only an insertion hole (not shown) is formed in advance in each of the shoulder 8a and the upper arm 8b constituting the shoulder joint 8, and the shoulder 8a and the upper arm 8b are directly connected to each other. No locking part or the like is provided. In addition, the embedding procedure of the shaft hole type magnet joint 1 and the adhesion surface to the shoulder joint portion 8 are not limited as long as the magnets 2 and 3 can rotate with each other, and can be appropriately selected.
In the robot toy 7 in which the shaft hole type magnet joint 1 is embedded in the shoulder joint portion 8 in this way, the attracted state of the magnets 2 and 3 is held by the shaft body 4, so that the shoulder portion 8 a and the upper arm portion 8 b are attached. The upper arm portion 8b can be easily rotated while maintaining the connection strength between the shoulder portion 8a and the upper arm portion 8b, although no locking portion or the like is provided.

According to the robot toy 7 having the structure described above, the attracting surfaces 2c and 3b of the magnets 2 and 3 come into contact with each other, and the shaft body 4 penetrates the shaft holes 2a and 3a. In addition, since each of the magnets 2 and 3 is rotatable with respect to the shaft body 4, the separation and dropping of the joints are surely prevented, and sufficient mobility is ensured. And since the magnets 2 and 3 are fixed in arbitrary rotation positions, the robot toy 7 can be hold | maintained for a long time with a desired attitude | position.
Further, since the end surfaces 4a and 4b of the shaft body 4 protrude from the shaft holes 2a and 3a, the adsorption surfaces 2c and 3b are prevented from being displaced or detached. Furthermore, by adhering the end faces 4a and 4b to the insertion holes 5c to 6d, the magnets 2 and 3 can be stably maintained in a rotatable state. In addition, since the shaft body 4 is unlikely to be detached from the shaft holes 2a and 3a, the tip periphery of the shaft body 4 is not easily worn.

  Furthermore, since the shaft body 4 is formed of a nonmagnetic material, the rotation of the joints and the like is smooth, and for example, it can be realized while enjoying a complicated movement of the limbs without feeling stress. Since the shaft body 4 can be quickly inserted into the shaft holes 2a and 3a, the shaft hole type magnetic joint 1 can be easily assembled and disassembled. Further, when the shaft body 4 is formed of a metal material, deformation can be prevented even when a force is applied from a direction other than the X direction while ensuring a predetermined bending strength. In this case, the attracting state between the magnets 2 and 3 is more reliably maintained. Therefore, combined with the effect of preventing the wear of the peripheral edge of the shaft body 4, the life of the entire toy including the shaft hole type magnet joint 1 can be extended.

In addition, the shaft hole type magnet joint 1 is composed of magnets 2 and 3 having shaft holes 2a and 3a and a shaft body 4, and has a light and simple structure. In addition, since many kinds of magnets are distributed in large quantities on the market, it is possible to easily obtain a product having a desired size and attractive force at a low cost. Therefore, the manufacturing cost can be suppressed and the method can be widely applied to parts having various shapes. Thus, the shaft hole type magnetic joint 1 is excellent in versatility.
Moreover, the process at the time of embedding the shaft hole type magnetic joint 1 is comparatively easy also for a child or an elderly person. Furthermore, since the burying procedure can be selected, the degree of freedom of work is high. That is, in the shaft hole type magnetic joint 1, since a customer layer is not limited, a large-scale demand can be anticipated.

  The shaft hole type magnetic joint of the present invention is not limited to the structure shown in the present embodiment. For example, any one of the end faces 4a and 4b of the shaft body 4 may be structured not to protrude from the shaft holes 2a and 3a. The magnets 2 and 3 may have a polygonal cross section. Furthermore, the sizes of the magnets 2 and 3 and the shaft body 4 are not limited to the values shown in the embodiments, and can be changed as appropriate. That is, the material, outer peripheral shape, and thickness of the magnets 2 and 3 are not particularly limited, and may not be the same outer peripheral shape and thickness. Furthermore, the shaft body 4 is preferably configured to be concentrically arranged with the central shaft 9 of the magnets 2 and 3. Therefore, the shaft body 4 is preferably formed in a columnar shape or a disk shape as shown in the present embodiment. In addition, since the shaft body 4 should just be slidable at least inside the shaft holes 2a and 3a of the magnets 2 and 3, it can also be made into a substantially conical shape, for example.

  The invention described in claims 1 to 3 can be applied to a toy or the like having a rotatable portion such as a robot having a joint.

  DESCRIPTION OF SYMBOLS 1 ... Shaft hole type magnet joint 2 ... Magnet 2a ... Shaft hole 2b, 2c ... Adsorption surface 2d ... Circumferential surface 3 ... Magnet 3a ... Shaft hole 3b, 3c ... Adsorption surface 3d ... Peripheral surface 4 ... Shaft body 4a, 4b ... End surface DESCRIPTION OF SYMBOLS 5 ... Joint 5a ... Fixed member 5b ... Rotary member 5c, 5d ... Insertion hole 6 ... Joint 6a ... Fixed member 6b ... Rotary member 6c, 6d ... Insertion hole 7 ... Robot toy 8 ... Shoulder joint part 8a ... Shoulder part 8b ... Upper arm 9 ... Center axis

Claims (3)

A set of magnets each having an axial hole perpendicular to the attracting surface;
A shaft body inserted into both of the shaft holes,
The pair of magnets is a shaft hole type magnet joint, wherein the shaft body is rotatably inserted into at least one of the shaft holes, and the attracting surfaces can be brought into contact with each other. At least one of the shaft holes is a through hole,
2. The shaft hole type according to claim 1, wherein the shaft body is formed such that an end portion protrudes from the through hole in a state where the attracting surfaces of the pair of magnets are in contact with each other. Magnet joint. The shaft hole type magnetic joint according to claim 1, wherein the shaft body is a non-magnetic body.

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