JP2005209941A - Non-contact feeder device - Google Patents

Abstract

[Purpose] In a power feeding device that inserts a column-shaped power receiving coil into a through-hole of a hollow cylindrical power feeding coil and performs non-contact power feeding by electromagnetic induction, such as thermal expansion due to heat generation of the coil or moisture or impurities in a poor environment The attachment prevents the attachment / detachment failure between the feeding coil and the receiving coil.
[Configuration] Grooves 13 and ridges 15 are formed in the insertion hole 10 of the hollow frustum-shaped feeding coil 3. When the solid conical receiving coil 4 is inserted, the receiving coil makes line contact with the ridges. Then, it is supported in the insertion hole and is in a power supply state. Since the gap 14 is formed between the two coils so as to penetrate vertically, water and foreign matter are not easily accumulated, and attachment / detachment is easy.
[Selection] Figure 3

Description

  In the present invention, the shape of the power supply coil connected to the power supply and the shape of the power reception coil connected to the load are in a cylindrical shape and a columnar shape that can be inserted and removed from each other. In particular, the present invention relates to a power supply device that can perform power supply from a power supply unit to a power reception unit in a non-contact manner by electromagnetic induction, and in particular, due to thermal expansion due to heat generation of the coil and adhesion of foreign substances in a poor environment, In this way, no attachment / detachment failure occurs.

  If you want to use any equipment that operates on electricity while installing or removing it as necessary in an adverse environment such as outdoors, use an explosion-proof or waterproof connector to connect the power supply side to the equipment side. Generally, a method of performing connection with is known.

  In such a method, the connector on the power supply side is provided with a cap or cover, and it is necessary to securely close the cap or cover when the device is not used. There is a risk of causing a disaster due to deterioration of the terminal portion of the terminal or, in the worst case, a short circuit.

  As a means for supplying electric power in such a poor environment involving an exposed state such as outdoors, a non-contact power supply system in which a power supply terminal using electromagnetic induction is not exposed to the outside has been proposed. However, such a non-contact power supply means using electromagnetic induction is inferior in terms of power efficiency in comparison with the contact type, so power is supplied as efficiently as possible and in a shape suitable for the application. It is desirable to configure the system.

  As a high-efficiency non-contact power supply system, the primary wire on the power supply side that outputs AC power driven at high frequency is wound around a core that is a cylindrical magnetic body around which the wire on the power reception side is wound, and the power reception side There is a method of supplying inductive power to the secondary electric wire connected to the winding of the wire. In this method, the power receiving side wire material (coil part) that is a wire wound around a cylindrical magnetic body is used. Since it cannot be easily removed from the wire rod, it does not meet the purpose of using it while it is attached or removed as necessary.

  Also, instead of the cylindrical magnetic material used in the above method, there is a method of using a split core (two semi-cylindrical magnetic materials are combined into a cylindrical shape). In this method, Although it can meet the purpose of using the power supply coil and the power reception coil while being attached or removed as necessary, the structure becomes complicated and is not practical.

One of the highly efficient non-contact power feeding devices other than those described above, and as a power feeding device considering use in a poor environment with an exposed state such as outdoors, for example, the non-patent document described in Patent Document 1 below There is a contact power supply device. This device is a charging connector for an automobile, and a cylindrical charging terminal 12 having a primary winding 11 connected to a power source is turned into a hollow cylindrical secondary winding connected to an automobile battery. On the other hand, it can be detachably inserted and can be fed in a non-contact manner by electromagnetic induction.
JP 2002-84664 A

  In order to increase the power efficiency in such a system, it is effective to shorten the distance between the power feeding coil and the power receiving coil. However, for this purpose, it is necessary to improve the adhesion between the power feeding coil and the power receiving coil.

  However, in a structure in which a columnar body is inserted into the through hole of the cylindrical body to obtain electromagnetic coupling between the power feeding coil and the power receiving coil, the coil generates heat and thermally expands when used in a poor environment, or the cylindrical through hole and columnar shape When moisture, salt, sand, dust, etc. adhere to the body fitting part and frictional resistance increases, it becomes difficult to attach and detach the coil, and in the worst case, it causes a problem such as damage to the equipment. there were.

  In view of this, the present invention provides a heat generating coil in the field of a power feeding device that inserts a columnar body into a through-hole of a cylindrical body, places a power feeding coil and a power receiving coil on a load side in an electromagnetic coupling state, and performs power feeding in a contactless manner by electromagnetic induction. The purpose of this is to prevent defective attachment / detachment between the power feeding coil and the power receiving coil due to thermal expansion due to water and adhesion of moisture, impurities, etc. in a poor environment.

  In the present invention, a partial gap is provided in the fitting portion of both coils while keeping the distance between the feeding coil and the receiving coil, which are structured to fit the columnar body in the through hole of the cylindrical body (minimum of the fitting portion). The present invention provides a non-contact power feeding device that solves the above problems by forming a shape that reduces the contact area.

  In addition, as a specific shape for providing a partial gap in the fitting portion (reducing the contact area of the fitting portion), a groove or a rib is provided on the fitting surface of the feeding coil or the receiving coil as described below. There are a structure and a method in which the cross-sectional shapes of the feeding coil and the receiving coil are polygonal and circular or circular and polygonal.

The contactless power supply device according to claim 1 has a power supply coil connected to a power source and a power reception coil connected to a load, and combines the power supply coil and the power reception coil in a power supply state in which electromagnetic coupling is established. In the non-contact power feeding device that performs non-contact power feeding from the power feeding coil to the power receiving coil by electromagnetic induction,
One of the power supply coil and the power receiving coil is a cylindrical member provided with an insertion hole, and the other is a columnar member inserted into the insertion hole,
The columnar member is detachably held in the insertion hole by contacting the inner surface of the insertion hole of the cylindrical member and the outer surface of the columnar member at a plurality of positions with a gap.

  The contactless power supply device according to claim 2 is the contactless power supply device according to claim 1, wherein one of the inner surface of the insertion hole of the cylindrical member and the outer surface of the columnar member is in contact with the other and the It is characterized in that a contact portion constituting the gap is provided.

  The contactless power supply device according to claim 3 is the contactless power supply device according to claim 2, wherein a groove serving as the gap is formed on one of the inner surface of the insertion hole of the cylindrical member and the outer surface of the columnar member. It is characterized in that the ridges serving as the contact portions are alternately formed.

  The contactless power supply device according to claim 4 is the contactless power supply device according to claim 2, wherein a plurality of contact portions are provided on one of the inner surface of the insertion hole of the cylindrical member and the outer surface of the columnar member. The feature is that a rib of a book is formed.

  The non-contact power feeding device described in claim 5 is the non-contact power feeding device according to claim 2, wherein one of the insertion hole and the columnar member of the cylindrical member is circular in cross section, and the other is in contact with the one. The cross-section is made polygonal.

  The contactless power supply device described in claim 6 is the contactless power supply device according to any of claims 1 to 5, characterized in that the insertion hole of the tubular member penetrates vertically.

  The contactless power supply device according to claim 7 is the contactless power supply device according to any one of claims 1 to 6, wherein the insertion hole of the cylindrical member and the columnar member have a shape in which a cross section is enlarged with respect to a drawing direction. It is characterized by being said.

  The contactless power supply device according to claim 8 is the contactless power supply device according to any one of claims 1 to 6, wherein the insertion hole of the cylindrical member and the columnar member have a shape having a constant cross section. One of the cylindrical member and the columnar member is provided with a locking portion that locks against the other.

  The contactless power supply device according to claim 9 is the contactless power supply device according to any one of claims 1 to 8, wherein a material of the power supply coil is more excellent in wear resistance than a material of the power reception coil. It is said.

  According to the non-contact power feeding device described in claim 1, there is a gap between the inner surface of the insertion hole of the cylindrical member that is the power feeding coil or the power receiving coil and the outer surface of the columnar member that is the power receiving coil or the power feeding coil. Since contact is made at a plurality of locations, even if the cylindrical member or the columnar member is thermally expanded due to the heat generated by the coil or a foreign object is interposed between the cylindrical member and the columnar member, the frictional resistance between them is remarkably reduced. Thus, both coils can be attached and detached smoothly and easily.

  According to the non-contact power feeding device described in claim 2, in the effect of the non-contact power feeding device according to claim 1, the contact portion is provided on one of the inner surface of the insertion hole and the outer surface of the columnar member and contacts the other. Since it was made to do, the said effect can be reliably achieved by ensuring the said clearance gap.

  According to the non-contact power feeding device described in claim 3, the effect of the non-contact power feeding device according to claim 2 is obtained by forming the groove serving as the gap on one of the inner surface of the insertion hole and the outer surface of the columnar member, and the This can be realized with a simple configuration in which the ridges to be contact portions are alternately formed.

  According to the non-contact power feeding device described in claim 4, the effect of the non-contact power feeding device according to claim 2 is applied to one of the inner surface of the insertion hole of the cylindrical member and the outer surface of the columnar member. This can be realized with a simple configuration of forming a plurality of ribs to be a part.

  According to the non-contact power feeding device described in claim 5, the effect of the non-contact power feeding device according to claim 2 is that one of the insertion hole of the cylindrical member and the columnar member is circular in cross section, and the other is It can be realized with a simple configuration in which a polygonal cross section is formed and the one of the polygons is in contact with the corner.

  According to the contactless power supply device described in claim 6, in the effect of the contactless power supply device according to claims 1 to 5, since the insertion hole of the cylindrical member penetrates vertically, the insertion hole is temporarily Even if foreign matter such as water or sand enters, it is discharged from the lower end of the opening and does not accumulate inside, and it is difficult for both members to be detached and attached due to the presence of foreign matter.

  According to the non-contact power supply device described in claim 7, in the effect of the non-contact power supply device according to claims 1 to 6, the insertion direction of the cylindrical member and the columnar member are upward directions in which the insertion direction is the extraction direction. Since the cross-section of the taper shape expands toward the center, the columnar member is securely held in the insertion hole when the columnar member is dropped into the insertion hole for electromagnetic coupling, and does not fall downward. The attachment / detachment operation becomes smoother and easier.

  According to the contactless power supply device described in claim 8, in the effect of the contactless power supply device according to claims 1 to 6, the insertion hole of the cylindrical member and the cross section of the columnar member are constant, Since one of the cylindrical member and the columnar member is provided with a locking portion for locking the other, the columnar member is securely inserted into the insertion hole when the columnar member is dropped into the insertion hole for electromagnetic coupling. It will be held in and will not fall out.

  According to the contactless power supply device described in claim 9, in the effect of the contactless power supply device according to claims 1 to 8, a plurality of types of external loads are connected to a single power supply coil by a power reception coil. When using such a method, the feeding coil is used more than the receiving coil, and when the installation location of the feeding coil is fixed, the maintenance of the feeding coil takes more time than the receiving coil. However, since the material of the power supply coil is superior to the material of the power receiving coil, the wear of the contact portion of the power supply coil is more reliably suppressed and the durability of the entire system is assured. And maintainability can be improved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention which are considered best by patent applicants at the time of filing to implement the present invention will be described with reference to FIGS.

1. First Embodiment A first embodiment of the present invention will be described with reference to FIGS.
First, with reference to FIG.1 and FIG.2, the circuit structure of this electric power feeder and the basic structure of two coils which are a non-contact connection part are demonstrated. FIG. 1 is a block diagram showing the overall configuration of this example, and FIG. 2 is a block diagram showing a modification in which the forms of the feeding coil and receiving coil are reversed in this example.

  In FIG. 1, 1 is a power supply unit, 2 is a control circuit for driving a feeding coil, 3 is a feeding coil, 4 is a receiving coil, 5 is a magnetic body, 6 is a rectifier circuit, and 7 is an external load. The feeding coil 3 and the receiving coil 4 are schematically shown, and the detailed shape and structure will be described later with reference to FIGS.

  In the control circuit 2, a driving waveform is generated by a signal generator based on the signal from the transmitter using the power supplied from the power supply unit 1, and the feeding coil 3 is driven by AC power of several kHz to several tens kHz. To do.

  The feeding coil 3 is a hollow cylindrical cylindrical member having a through hole 10 inserted in the center, and the power receiving coil 4 is a solid cylindrical columnar member that can be inserted into the insertion hole. 3 so that it can be inserted into the three insertion holes 10.

  When the external load 7 is used, the power receiving coil 4 is inserted into the power feeding coil 3 and used in a state where both coils are electromagnetically coupled. In order to increase power efficiency, it is desirable that the power receiving coil 4 includes a magnetic body 5.

  When the power feeding coil 3 is driven by the AC power of the power supply unit 1, an induced electromotive force is generated in the power receiving coil 4 due to an electromagnetic induction phenomenon. The AC power generated in the power receiving coil 4 is converted into desired DC power by the rectifier circuit 6 and supplied to the external load 7.

  Note that the shapes of the feeding coil 3 and the receiving coil 4 can be reversed. In that case, as shown in FIG. 2, the power feeding coil 3R has a shape that can be inserted into the insertion hole 10R of the power receiving coil 4R, and when the external load 7 is used, the power feeding coil 3R is inserted into the power receiving coil 4R. Insert it into 10R. In order to increase the power efficiency, it is desirable that the feeding coil 3R includes the magnetic body 5R.

Next, details of the shapes and structures of the feeding coil and the receiving coil will be described with reference to FIGS. 3 and 4.
FIG. 3 is a top view showing a fitting state between the feeding coil 3 and the receiving coil 4, and FIG. 4 is a front sectional view showing a fitting state between the feeding coil 3 and the receiving coil 4. 3 and 4, the power receiving coil 4 is inserted into the insertion hole 10 of the power feeding coil 3 as schematically illustrated in FIG. 1, and in a form opposite to that shown in FIG. 2. I will omit the explanation.

  3 and 4, 3 is a power supply coil, 4 is a power reception coil, 5 is a magnetic body, 11 is a power supply coil winding, 12 is a power reception coil winding, 13 is a groove, and 14 is a gap. The feeding coil 3 is provided with a feeding coil winding 11. Similarly, the power receiving coil 4 is provided with a power receiving coil winding 12.

  In this example, the feeding coil 3 is a hollow conical cylindrical member whose cross-sectional shape of the insertion hole 10 is a perfect circle or an ellipse, such as a cup having no bottom (that is, open at both upper and lower end faces) A plurality of grooves 13 are provided on the inner wall surface of the insertion hole 10. The groove 13 has a substantially arc-shaped cross section in a cross section perpendicular to the penetrating direction (axial direction) of the insertion hole 10 and is formed continuously in the penetrating direction of the insertion hole 10. That is, it is formed at a plurality of positions so as to be adjacent to each other (within the cross section). As a result, between the adjacent grooves 13 and the grooves 13 protrudes inward of the insertion hole 10 and in the through direction of the insertion hole 10. It is a continuous ridge 15. That is, on the inner surface of the insertion hole 10, a plurality of ridges 15 that are continuous vertically and a plurality of grooves 13 that penetrate vertically are alternately formed. The protrusion 15 has a function of holding the receiving coil 4 in contact with the receiving coil 4 when the receiving coil 4 is inserted into the insertion hole 10 as will be described later. A gap 14 is formed between the grooves 13.

  In this example, the power receiving coil 4 is a solid conical columnar member whose cross section that matches the inner shape of the insertion hole 10 of the power feeding coil 3 is inserted into the insertion hole 10 of the power feeding coil 3. Then, the shape is inscribed in the ridge 15.

  As shown in FIGS. 3 and 4, the feeding coil 3 and the receiving coil 4 are not in close contact with each other, but are in contact with each other by a plurality of ridges 15. Partially suitable gaps 14 are provided. The gap 14 is opened at both upper and lower end faces of the power supply coil 3, and water and foreign matter that have entered the gap 14 fall and be discharged downward from the outside, so that they do not accumulate inside. In addition, even when the coils 3 and 4 are thermally expanded due to heat generation, or when moisture, salt, sand, dust or the like has entered and adhered to the fitting portion, the frictional resistance between them is a surface contact. Compared to this, the number of the coils is significantly reduced, and the power supply coil 3 and the power reception coil 4 can be smoothly attached and detached.

  Moreover, in this example, since the shape of the feeding coil 3 and the receiving coil 4 is a taper shape in which the cross-sectional shape expands in the drawing direction, a further smooth attachment / detachment effect can be obtained.

  Further, in the actual usage mode of the non-contact power feeding device according to the present example, a plurality of types of external loads 7 are connected to a single power feeding coil 3 as in a general outlet. Since a plurality of power receiving coils 4 are used, the power feeding coil 3 is used more times than the power receiving coil 4.

  Further, when the feeding coil 3 is fixed at a specific installation location, it is assumed that the maintenance for the feeding coil 3 takes more time than the maintenance for the receiving coil 4.

  Therefore, by making the material of the power supply coil 3 higher in wear resistance than the material of the power receiving coil 4, it is possible to suppress wear of the contact portion of the power supply coil 3, and to improve the durability and maintainability of the entire system. It can be made.

  Various types of resin materials can be used as the wear-resistant material. As an example of a specific resin, POM (polyacetal) or BMC may be used for the feeding coil 3 and ABS may be used for the receiving coil 4.

  In addition, by using a material having antifouling property, water repellency, and self-lubricating properties such as Teflon (R) as the material of the contact portion, a smoother attaching / detaching effect can be obtained.

  In this example, the groove 13 is provided on the power feeding coil 3 side, but may be provided on the power receiving coil 4 side. The shape and number of the grooves 13 and the protrusions 15 are not particularly limited as long as the purpose of stably providing an appropriate gap 14 between the feeding coil 3 and the receiving coil 4 can be achieved. .

2. Second embodiment (FIGS. 5 and 6)
Next, a second embodiment of the present invention will be described with reference to FIGS.
FIG. 5 is a top view showing a fitting state between the feeding coil 3 ′ and the receiving coil 4, and FIG. 6 is a front sectional view showing a fitting state between the feeding coil 3 ′ and the receiving coil 4. In this example, parts different from those in the first example are denoted by reference numerals different from those in the first example as necessary, and configurations common to the first example are the same as those in the first example as necessary. The description is abbreviate | omitted and attached | subjected. The circuit configuration of this example is the same as that described with reference to FIGS.

  In this example, the feeding coil 3 ′ is a hollow conical cylindrical member equivalent to the feeding coil 3 of the first example, and the inner surface of the insertion hole 10 ′ is in contact with the receiving coil 4 described later. Ribs 16 are provided as contact portions to be supported. A total of three ribs 16 are provided so as to be parallel to the penetration direction (axial direction) of the insertion hole 10 ′ of the feeding coil 3 ′ and equiangularly spaced in the circumferential direction of the insertion hole 10 ′. Yes. The length of the rib 16 is the same as the length of the insertion hole 10 ′ in the penetrating direction, and reaches the openings above and below the insertion hole 10 ′. The cross-sectional shape of the rib 16 whose cut surface is a plane orthogonal to the penetration direction of the insertion hole 10 ′ is rounded on the distal end side (receiving coil 4 side), and the insertion and removal of the receiving coil 4 from the insertion hole 10 ′ is smooth. It is configured to be performed.

  The power receiving coil 4 of this example has substantially the same shape as the first example, and when inserted into the insertion hole 10 ′ of the power feeding coil 3 ′, the insertion hole 10 ′ is inscribed in the apexes of the three ribs 16. It is shaped to be held inside.

  As shown in FIGS. 5 and 6, the power feeding coil 3 ′ and the power receiving coil 4 are not completely in close contact with each other, and an appropriate gap 14 ′ is partially provided by a rib 16 in the fitting portion. As a result, the same effect as the gap 14 in the first example can be obtained.

  In this example, the rib 16 is provided on the power supply coil 3 ′ side, but it may be provided on the outer peripheral surface of the power reception coil 4. Further, the shape and the number of the ribs 16 are not particularly limited as long as the purpose of stably providing an appropriate gap 14 ′ between the feeding coil 3 ′ and the receiving coil 4 is achieved.

3. Third embodiment (FIGS. 7 and 8)
Next, a third embodiment of the present invention will be described with reference to FIGS.
FIG. 7 is a top view showing a fitting state between the feeding coil 3 ″ and the receiving coil 4 ″, and FIG. 8 is a front sectional view showing a fitting state between the feeding coil 3 ″ and the receiving coil 4 ″. In this example, parts different from those in the first and second examples are denoted by reference numerals different from those in the first and second examples as necessary, and a configuration common to the first and second examples is necessary. Accordingly, the same reference numerals as those in the first and second examples are attached, and the description thereof is omitted. The circuit configuration of this example is the same as that described with reference to FIGS.

  In this example, the feeding coil 3 ″ has a structure in which the rib 16 is removed from the feeding coil 3 ′ in the second example. Therefore, the insertion hole 10 ″ is a simple circular through hole, and the other shapes are generally the first. And the same as the second example.

  The power receiving coil 4 ″ of this example is a polygonal frustum-shaped columnar member, and each ridge 17 of the polygonal frustum shape becomes a contact portion inscribed in the inner peripheral surface of the insertion hole 10 ″ of the feeding coil 4 ″. In this example, the power receiving coil 4 ″ has a hexagonal cross-sectional shape in a plane perpendicular to the penetration direction of the insertion hole, and therefore, the six receiving edges are in contact with the inner peripheral surface of the insertion hole 10 ″. It will be supported in the hole 10 ".

  The feeding coil 3 ″ and the receiving coil 4 ″ are in line contact as shown in FIGS. 7 and 8, and are not completely in close contact with each other. As a result, the same effect as the gaps 14 and 14 ″ in the first and second examples can be obtained.

  In this example, the power receiving coil 4 ″ is a polygonal frustum-shaped columnar member, but the power feeding coil may be a polygonal frustum-shaped columnar member, and the power feeding coil may be a hollow conical cylindrical member. Even in this case, the number of polygonal frustum-shaped corners is not particularly limited as long as the object of stably providing an appropriate gap between the feeding coil and the receiving coil is achieved.

  In each example of the embodiment described above, both coils have a fitting structure of a tapered cylindrical member and a columnar member, and even if the columnar member is inserted into the insertion hole, it falls off from the bottom of the insertion hole that penetrates. There was no. However, the shape of both the coils, which are cylindrical members or columnar members, is not limited to a tapered shape, and may be a straight pipe structure having a constant cross-sectional shape in the drawing direction or insertion direction as shown in FIGS. . In that case, even if the columnar member is inserted into the insertion hole, it is locked to at least one of the cylindrical member or the columnar member with respect to the other so that the columnar member does not fall out from the bottom of the inserted insertion hole. It is necessary to provide a locking portion so that the columnar member is held in the penetrating insertion hole so that the electromagnetic coupling state is established.

  In each example of the embodiment described above, the insertion holes are opened on the upper and lower surfaces of the cylindrical member, but other structures may be used. For example, the upper surface of the cylindrical member is opened for insertion of the columnar member, but the lower side is closed by the bottom wall, but a number of holes are provided in the bottom wall for removing water and foreign matters, The outside world may be communicated.

FIG. 1 is a block diagram showing the overall configuration of the embodiment. FIG. 2 is a block diagram showing a modification in which the forms of the feeding coil and the receiving coil are reversed in the embodiment. FIG. 3 is a top view showing a fitting state between the power feeding coil and the power receiving coil in the first example of the embodiment. FIG. 4 is a front sectional view showing a fitting state between the power feeding coil and the power receiving coil in the first example of the embodiment. FIG. 5 is a top view illustrating a fitting state between the power feeding coil and the power receiving coil in the second example of the embodiment. FIG. 6 is a front sectional view showing a fitting state between the power feeding coil and the power receiving coil in the second example of the embodiment. FIG. 7 is a top view illustrating a fitting state between the power feeding coil and the power receiving coil in the third example of the embodiment. FIG. 8 is a front cross-sectional view illustrating a fitting state between the power feeding coil and the power receiving coil in the third example of the embodiment.

Explanation of symbols

3, 3 ', 3 "... Feed coil 4, 4" ... Feed coil 10, 10', 10 "... Insert hole 13 ... Groove 14, 14 ', 14" ... Clearance 15 ... Convex strip 16 as contact Rib as part 17 ... Ridge as contact part

Claims (9)

A power supply coil connected to a power source and a power reception coil connected to a load, and by combining the power supply coil and the power reception coil in a power supply state in which electromagnetic coupling is established, the power supply coil to the power reception coil by electromagnetic induction In a non-contact power supply device that performs non-contact power supply,
One of the power supply coil and the power receiving coil is a cylindrical member provided with an insertion hole, and the other is a columnar member inserted into the insertion hole,
The columnar member is detachably held in the insertion hole by contacting the inner surface of the insertion hole of the cylindrical member and the outer surface of the columnar member at a plurality of positions with a gap. A non-contact power feeding device. The contactless power feeding device according to claim 1, wherein a contact portion that contacts the other and forms the gap is provided on one of an inner surface of the insertion hole of the cylindrical member and an outer surface of the columnar member. . The groove which becomes the said clearance gap, and the protruding item | line part which becomes the said contact part were formed in one side of the inner surface of the said insertion hole of the said cylindrical member, and the outer surface of the said columnar member, The Claim 2 characterized by the above-mentioned. Non-contact power feeding device. The non-contact power feeding apparatus according to claim 2, wherein a plurality of ribs serving as the contact portions are formed on one of the inner surface of the insertion hole of the cylindrical member and the outer surface of the columnar member. 3. The non-contact power feeding apparatus according to claim 2, wherein one of the insertion hole and the columnar member of the cylindrical member has a circular cross section, and the other has a polygonal cross section in contact with the one. The contactless power feeding device according to claim 1, wherein an insertion hole of the cylindrical member penetrates vertically. The contactless power feeding device according to claim 1, wherein the insertion hole of the cylindrical member and the columnar member have a shape in which a cross section is enlarged with respect to a drawing direction. The cylindrical member insertion hole and the columnar member have a constant cross section, and one of the cylindrical member and the columnar member is provided with a locking portion that locks against the other. The contactless power supply device according to claim 1, wherein the contactless power supply device is provided. The non-contact power feeding device according to claim 1, wherein a material of the power feeding coil is more excellent in wear resistance than a material of the power receiving coil.

Images