Holder, frame forming part of the holder, and fixture for the holder

Abstract

To provide a holding frame that allows a user to readily place a retainer at a position on a frame formation part in a manner that a medium to be held can be extended at a proper tension.SOLUTION: A holding frame for holding a medium to be held comprises: an annular frame formation part having a mounting surface for mounting the medium to be held and a first magnet placed along the mounting surface; and at least one retainer having a holding surface for sandwiching the medium to be held between itself and the mounting surface and a second magnet placed along the holding surface. The frame formation part includes a plurality of magnetic field generating parts to generate magnetic fields using the first magnet. The first magnet is placed in such a manner that the magnetic field directions of adjacent ones of the plurality of first magnetic field generating parts are opposite to each other on the mounting surface. Each of the at least one retainer includes a plurality of second magnetic field generating parts to generate magnetic fields using the second magnet. The second magnet is placed in such a manner that the magnetic field directions of adjacent ones of the plurality of second magnetic field generating parts are opposite to each other on the mounting surface.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a holding frame, a frame forming portion of the holding frame, and a holder for the holding frame.

Background Art

[0002] Conventionally, a holding frame for stretching a cloth has been known. The holding frame disclosed in Patent Document 1 includes a frame body formed from four frame side portions and a plurality of holders. Each holder includes a top portion and guide pieces extending bifurcately from both ends of the top portion. A magnet member is attached to either the top portion of the holder or one of the frame side portions, and a member to be adsorbed is attached to the other. In a state where a plurality of holders are placed so as to straddle the frame side portion via a cloth, the holding frame stretches the cloth by adsorbing with the magnet member facing the member to be adsorbed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 discloses a specific configuration of a holding frame in which, in a state where a holder is attached to a frame side portion via a cloth, the length of the member to be adsorbed on the frame side portion is longer than the length of the magnet member of the holder in the longitudinal direction of the frame side portion. In this specific configuration of the holding frame, a user can arrange the holder at an arbitrary position in the longitudinal direction on the long member to be adsorbed on the frame side portion. For this reason, depending on the arrangement position of the holder, the tension of the cloth held by the holding frame fluctuates, and there is a possibility that the cloth cannot be stretched with an appropriate tension.

[0005] The present invention has been made to solve the above-described problems, and an object thereof is to provide a holding frame that allows a user to easily arrange a holder at a position of a frame forming portion where a held medium can be stretched with an appropriate tension.

Means for Solving the Problem

[0006] The holding frame according to the first aspect of the present invention is a holding frame for holding a medium to be held, and includes an annular frame forming portion having a placement surface on which the medium to be held is placed and a first magnet arranged along the placement surface, and at least one holder having a holding surface that sandwiches the medium to be held between the holding surface and the placement surface and a second magnet arranged along the holding surface. The frame forming portion has a plurality of first magnetic field generating portions that generate a magnetic field by the first magnet, and the first magnet is arranged in the frame forming portion such that the magnetic field directions of adjacent plurality of first magnetic field generating portions are opposite to each other on the placement surface. Each holder of the at least one holder has a plurality of second magnetic field generating portions that generate a magnetic field by the second magnet, and the second magnet is arranged in each holder such that the magnetic field directions of adjacent plurality of second magnetic field generating portions are opposite to each other on the holding surface. In a state where each holder is attached to the frame forming portion, the plurality of first magnetic field generating portions and the plurality of second magnetic field generating portions face each other, and the magnetic field direction of the first magnetic field generating portion and the magnetic field direction of the second magnetic field generating portion are the same.

[0007] In the holding frame of the first aspect, at a position where the first magnetic field generating portion and the second magnetic field generating portion face each other and the magnetic field directions of each other are the same, an attracting magnetic force is generated between the first magnetic field generating portion and the second magnetic field generating portion. On the other hand, at a position where the first magnetic field generating portion and the second magnetic field generating portion face each other and the magnetic field directions of each other are opposite, a repulsive magnetic force is generated between the first magnetic field generating portion and the second magnetic field generating portion. That is, since the holder is attached to the frame forming portion only at a certain position where an attracting magnetic force is generated between the holder and the frame forming portion, the user can easily stretch the medium to be held on the holding frame with an appropriate tension.

[0008] In the first aspect, further, the first magnet may be a plurality of frame magnet members arranged at intervals in the frame forming portion. One first magnetic field generating portion may be formed by each of the plurality of frame magnet members. The second magnet may be a plurality of holding magnet members arranged at intervals in each holder. One second magnetic field generating portion may be formed by each of the plurality of holding magnet members.

[0009] In the holding frame of the first aspect, since one first magnetic field generating portion and one second magnetic field generating portion are respectively formed by one magnet member, the amount of magnets used can be reduced compared to the case where a plurality of first magnetic field generating portions and a plurality of second magnetic field generating portions are respectively formed by one magnet member. Therefore, the holding frame can be manufactured at low cost. In addition, since the size of each magnet member becomes smaller, it is possible to reduce the occurrence of local bending stress acting on the frame forming portion due to detachment of the holder from the frame forming portion, resulting in cracking of the magnet.

[0010] In the first aspect, further, the frame forming portion may define an inner region that extends in the direction in which the medium to be held is extended. The plurality of first magnetic field generating portions may be an even number of first magnetic field generating portions, and the plurality of second magnetic field generating portions may be an even number of second magnetic field generating portions. Each holder may have a protruding portion, and the holding surface may be a surface that extends parallel to the direction in which the medium to be held is extended when each holder is attached to the frame forming portion. The protruding portion may extend toward the inner region of the frame forming portion in a direction intersecting the direction in which the medium to be held is extended when each holder is attached to the frame forming portion.

[0011] In the holding frame of the first aspect, when the protruding portion is located in the inner region, the holder is attached to the frame forming portion by the attracting magnetic force between the even number of first magnetic field generating portions and the even number of second magnetic field generating portions. On the other hand, when the protruding portion is located on the side opposite to the inner region in the direction in which the medium to be held is extended, a repulsive magnetic force is generated between the even number of first magnetic field generating portions and the even number of second magnetic field generating portions. Therefore, in the direction in which the medium to be held is extended, the direction of attaching the holder to the frame forming portion is uniquely determined, so that it is possible to reduce the user from attaching the holder in the wrong direction.

[0012] In the first aspect, further, the frame forming portion may define an inner region that extends in the direction in which the medium to be held is extended. Each holder has at least one gripping portion, and in a state where each holder is attached to the frame forming portion, at least one gripping portion has a shape that protrudes in a direction parallel to the direction in which the medium to be held is extended from the frame forming portion, or is formed in a shape that is spaced upward from the mounting surface of the frame forming portion.

[0013] In the holding frame of the first aspect, in a state where the holder is attached to the frame forming portion, the user can easily remove the holder from the frame forming portion by gripping the gripping portion formed in a shape that protrudes in a direction parallel to the direction in which the medium to be held is extended from the frame forming portion, or in a shape that is spaced upward from the mounting surface of the frame forming portion.

[0014] In the first aspect, further, an anti-slip portion that generates a greater friction than the friction generated between the medium to be held and the mounting surface of the frame forming portion may be disposed on the mounting surface of the frame forming portion.

[0015] In the holding frame of the first aspect, by disposing an anti-slip portion, for example, a member made of a material that generates a large friction such as an adhesive sheet such as urethane gel, a lint brush, or rubber, on the mounting surface of the frame forming portion, in a state where the medium to be held is held between the holder and the frame forming portion, not only the attracting magnetic force between the magnet of the holder and the magnet of the frame forming portion, but also the friction between the anti-slip portion and the medium to be held causes the medium to be held to be held by the holding frame, and thus the state in which the medium to be held is extended with an appropriate tension can be easily maintained.

[0016] In the first aspect, further, each holder may extend along the holder extension direction along the frame forming portion in a state where each holder is attached to the frame forming portion. At least one specific second magnetic field generating portion among the plurality of second magnetic field generating portions may be disposed at a position where the distance between the end of each holder and the center of the specific second magnetic field generating portion is shorter than the distance between the center of each holder and the center of the specific second magnetic field generating portion in the holder extension direction.

[0017] In the holding frame of the first aspect, at least one second magnetic field generating portion is disposed near the end of the holder in the extending direction of the holder. Therefore, compared with the case where the second magnetic field generating portion is not disposed near the end of the holder, the frame forming portion and the end of the holder can hold a wide range up to the vicinity of the end of the holder and the held medium extending outward from the end of the holder.

[0018] In the first aspect, further, the frame forming portion may have a plurality of frame side portions and a plurality of connecting portions. A plurality of first magnetic field generating portions may be disposed on each frame side portion. Each connecting portion of the plurality of connecting portions may connect the ends of two adjacent frame side portions among the plurality of frame side portions. The two frame side portions connected to each connecting portion may extend in frame extending directions that are different from each other. At least one specific first magnetic field generating portion among the plurality of first magnetic field generating portions disposed on a specific frame side portion among the plurality of frame side portions may be disposed at a position where the distance between the end of the specific frame side portion connected to each connecting portion and the center of the specific first magnetic field generating portion is shorter than the distance between the center of the specific frame side portion and the center of the specific first magnetic field generating portion in the frame extending direction of the specific frame side portion.

[0019] In the holding frame of the first aspect, at least one first magnetic field generating portion is disposed near the end of the frame side portion in the frame extending direction. Therefore, compared with the case where the first magnetic field generating portion is not disposed near the end of the frame side portion, the end of the frame side portion and the holder can hold a wide range up to the vicinity of the end of the frame side portion and the held medium extending from the end of the frame valve portion to the connecting portion.

[0020] In the first aspect, further, at least one holder may be a plurality of holders that is the maximum number attachable to the frame forming portion. The frame forming portion may have the same number of first magnetic field generating portions as the total number of second magnetic field generating portions of the plurality of holders.

[0021] In the holding frame of the first aspect, since the held medium is held by the plurality of holders and the frame forming portion, the held medium can be easily extended onto the holding frame with an appropriate tension.

[0022] The frame forming part of the holding frame according to the second aspect of the present invention is a frame forming part of a holding frame that holds a medium to be held by sandwiching it in cooperation with at least one holder, and includes an annular placement surface on which the medium to be held is placed and a first magnet. The first magnet has a plurality of first magnetic field generating parts that generate a magnetic field, and the first magnet is arranged such that the magnetic field directions of adjacent first magnetic field generating parts are opposite to each other on the placement surface.

[0023] In the frame forming part of the holding frame of the second aspect, since the magnetic field directions of adjacent first magnetic field generating parts are opposite to each other, the user can easily attach the holder to the position of the frame forming part where a magnetic force attracting between the holder and the frame forming part is generated.

[0024] The holder for the holding frame according to the third aspect of the present invention is a holder for a holding frame that holds a medium to be held in cooperation with an annular frame forming part, and includes a holding surface that sandwiches the medium to be held with the frame forming part and a second magnet arranged along the holding surface. The second magnet has a plurality of second magnetic field generating parts that generate a magnetic field, and the second magnet is arranged such that the magnetic field directions of adjacent second magnetic field generating parts are opposite to each other on the holding surface.

[0025] In the holder of the third aspect, since the magnetic field directions of adjacent second magnetic field generating parts are opposite to each other, the user can easily attach the holder to the position of the frame forming part where a magnetic force attracting between the holder and the frame forming part is generated.

Brief Description of the Drawings

[0026]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0027] [Embodiment] Hereinafter, the holding frame 1 which is an embodiment of the present invention will be described with reference to the drawings.

[0028] With reference to FIGS. 1 to 7, the structure of the holding frame 1 will be described. The overall external configuration of the holding frame 1 according to this embodiment will be described with reference to FIG. 1. The holding frame 1 is detachably attached to the sewing machine via the attachment portion 7 of the sewing machine. Since the detailed configuration regarding the sewing machine is described in Japanese Patent Application Laid-Open No. 2019-115466, the description thereof will be omitted. The holding frame 1 is composed of a frame body 2 and a holder 3, and the holder 3 is configured to be attachable or detachable to / from the frame body 2. In this specification, the vertical direction, the front-rear direction, and the left-right direction refer to the directions indicated by the arrows in FIG. 1 based on the line of sight of a user who views the sewing machine from the front.

[0029] ≪Structure of the Frame Body 2≫ The detailed structure of the frame body 2 will be described with reference to FIGS. 1 to 4. The frame body 2 has a rectangular structure. The frame body 2 includes a frame forming portion 4, magnet units 5N and 5S, and a fastener 60.

[0030] <Structure of the Frame Forming Portion 4> The frame forming portion 4 is made of a non-magnetic material such as plastic and is formed into a rectangular shape. As shown in FIG. 1, the frame forming portion 4 includes four frame side portions 10, four connecting portions 20, and an attachment portion 25. As shown in FIG. 2, the rectangular frame forming portion 4 defines a rectangular inner region A1.

[0031] (Structure of the frame side portion 10 and the connecting portion 20) As shown in FIG. 2, the four frame side portions 10 are four frame side portions 10A to 10D. When not specifying or generally referring to each frame side portion of the four frame side portions 10A to 10D, it is described as the frame side portion 10. The frame side portions 10A and 10C extend linearly in the left-right direction. As shown in FIG. 7, the frame side portion 10 has a rectangular cross-section. On the upper surface 11 of the frame side portion 10, the upper end portion close to the inner region A1 is formed to incline downward toward the inner region A1. As shown in FIG. 2, the frame side portions 10B and 10D extend linearly in the front-rear direction. In the present embodiment, the length of the frame side portions 10A and 10C in the left-right direction is set to be longer than the length of the frame side portions 10B and 10D in the front-rear direction. When the frame body 2 is attached to the sewing machine, since the frame side portions 10B and 10D are arranged parallel to the direction in which the arm portion of the sewing machine extends, the length of the frame side portions 10B and 10D depends on the length of the arm portion of the sewing machine. Four through holes 12 penetrating in the vertical direction are respectively formed in the frame side portions 10A and 10C. Two through holes 12 penetrating in the vertical direction are respectively formed in the frame side portions 10B and 10D. The through hole 12A of the frame side portion 10A is arranged at the same position in the front-rear direction as the through hole 12K of the frame side portion 10C. Since the through holes 12B to 12D are also arranged at the same position in the front-rear direction as the through holes 12J to 12G, for representative purposes, the frame side portion 10A will be described. The through hole 12E of the frame side portion 10B is arranged at the same position in the left-right direction as the through hole 12M of the frame side portion 10D. Since the through hole 12F is also arranged at the same position in the left-right direction as the through hole 12L, for representative purposes, the frame side portion 10B will be described. Also, since all the through holes 12 formed in the frame side portions 10A to 10D have the same structure, when not specifying or generally referring to each through hole, it is described as the through hole 12.

[0032] The four connecting parts 20 are the four connecting parts 20A to 20D. When not specifying or when generally referring to each of the four connecting parts 20A to 20D, they are described as the connecting part 20. The connecting part 20 has a substantially L-shaped form. The connecting part 20A connects the frame side part 10A and the frame side part 10D. The connecting part 20B connects the frame side part 10A and the frame side part 10B. The connecting part 20C connects the frame side part 10B and the frame side part 10C. The connecting part 20D connects the frame side part 10C and the frame side part 10D.

[0033] In the frame side part 10A, the four through holes 12A to 12D are arranged in a row in the left - right direction. The left end 10AL of the frame side part 10A is located at the leftmost of the portion that linearly extends in the left - right direction among the front ends of the frame side part 10A. The left end 10AL is connected to the connecting part 20A that bends forward. The right end 10AR of the frame side part 10A is located at the rightmost of the portion that linearly extends in the left - right direction among the front ends of the frame side part 10A. The right end 10AR is connected to the connecting part 20B that bends forward. The center of the frame side part 10A means the center between the left end 10AL and the right end 10AR in the left - right direction. In the left - right direction, the distance L1 between the center of the through hole 12A and the center of the through hole 12B is equal to the distance L2 between the center of the through hole 12C and the center of the through hole 12D. The distance L3 between the center of the through hole 12A and the left end 10AL is shorter than the distance L4 between the center of the through hole 12A and the center of the frame side part 10A. The distance L5 between the center of the through hole 12D and the right end 10AR is shorter than the distance L6 between the center of the through hole 12D and the center of the frame side part 10A. The distance L3 is equal to the distance L5, and the distance L4 is equal to the distance L6. That is, the through holes 12A, 12B and the through holes 12C, 12D are formed symmetrically with respect to the front - rear center line passing through the center of the frame side part 10A in the left - right direction.

[0034] In the frame side portion 10B, the two through holes 12E and 12F are arranged in a row in the front-rear direction. The front end 10BF of the frame side portion 10B is located at the foremost position of the portion of the left end of the frame side portion 10B that extends linearly in the front-rear direction. The front end 10BF is connected to a connecting portion 20C that bends to the left. The rear end 10BB of the frame side portion 10B is located at the rearmost position of the portion of the left end of the frame side portion 10B that extends linearly in the front-rear direction. The rear end 10BB is connected to a connecting portion 20B that bends to the left. The center of the frame side portion 10B means the center between the front end 10BF and the rear end 10BB in the front-rear direction. The distance L7 between the center of the through hole 12E and the rear end 10BB is shorter than the distance L8 between the center of the through hole 12E and the center of the frame side portion 10B. The distance L9 between the center of the through hole 12F and the front end 10BF is shorter than the distance L10 between the center of the through hole 12F and the center of the frame side portion 10B. The distance L7 is equal to the distance L9, and the distance L8 is equal to the distance L10. That is, the through hole 12E and the through hole 12F are formed symmetrically with respect to the left-right center line passing through the center of the frame side portion 10B in the front-rear direction. Also, the sum of the distance L8 and the distance L10 is longer than the distance L1.

[0035] As shown in FIG. 3, openings 14 and 16 that open downward are formed on the lower surface of the frame forming portion 10 and communicate with the through holes 12. Since all the through holes 12 have the same configuration, the through holes 12J and 12K will be described as representatives. An opening 14A communicates with the left side of the through hole 12K, and an opening 14B communicates with the right side of the through hole 12J. An opening 16 is formed between the through hole 12K and the through hole 12J. On the front side wall of the frame side portion 10 that defines the opening 16, two retaining claws 18A that protrude inside the opening 16 are formed. On the rear side wall of the frame side portion 10 that defines the opening 16, two retaining claws 18B that protrude inside the opening 16 are formed.

[0036] (Structure of the mounting portion 25) As shown in FIG. 1, the mounting portion 25 includes a base portion 26 and protruding portions 27 and 28. The base portion 26 is a portion that extends in the left-right direction. The protruding portion 27 protrudes upward from the base portion 26 and extends in the left-right direction. The protruding portion 28 protrudes downward from the base portion 26 and extends in the left-right direction. The base portion 26 is connected to the frame side portion 10A.

[0037] <Structure of Magnet Units 5N and 5S> As shown in FIG. 3, the magnet units 5N and 5S include a magnet member 30, a fixing frame 40, and a yoke 50. Since the magnet units 5N and 5S have the same structure except for the direction of the magnetic field generated by the magnet member 30 being different, the magnet unit 5N will be described as a representative.

[0038] (Structure of Magnet Member 30) The magnet member 30 is a permanent magnet such as a neodymium magnet. As shown in FIG. 3, the magnet member 30 has a substantially rectangular parallelepiped shape. The magnet member 30 generates a magnetic field in the vertical direction. That is, in the magnet unit 5N, the N pole is arranged on the upper surface 32 of the magnet member 30, and the S pole is arranged on the lower surface 34. In the magnet unit 5S, the S pole is arranged on the upper surface 32 of the magnet member 30, and the N pole is arranged on the lower surface 34.

[0039] (Structure of Fixing Frame 40) The fixing frame 40 is made of a non-magnetic material such as stainless steel. As shown in FIG. 3, the fixing frame 40 has a substantially square shape in plan view. The fixing frame 40 is formed by bending a flat non-magnetic material. A storage chamber 42 for housing the magnet member 30 is formed in the central portion of the fixing frame 40 in the left-right direction. The fixing portion 44A extends leftward from the side wall forming the storage chamber 42. The fixing portion 44B extends rightward from the side wall forming the storage chamber 42.

[0040] (Structure of Yoke 50) The yoke 50 is made of a magnetic material such as an iron plate. As shown in FIG. 3, the yoke 50 has a substantially U-shaped cross-section when viewed from the side in the left-right direction. The yoke 50 is formed by bending a flat magnetic material so that an opening 52 that opens upward is formed.

[0041] <Structure of Fastener 60> The fastener 60 is formed into a rectangular shape using a non-magnetic material such as plastic. As shown in Fig. 3, at the central portion of the fastener 60 in the left-right direction, deformation portions 62A and 62B are respectively formed at the front end and the rear end of the fastener 60. The deformation portions 62A and 62B are formed such that the thickness in the front-rear direction is smaller than that of the front end or the rear end of the fastener 60 other than the portions where the deformation portions 62A and 62B are formed. Therefore, when the user presses the deformation portion 62A backward and the deformation portion 62B forward with a finger or a dedicated tool, the deformation portions 62A and 62B are easily deformed. Two retaining claws 64A are formed at the upper end of the deformation portion 62A and protrude forward. Two retaining claws 64B are formed at the upper end of the deformation portion 62B and protrude backward.

[0042] ≪Assembly of the frame body 2≫ The assembly of the frame body 2 will be described with reference to Fig. 3. Since the fixing methods of the magnet units 5N and 5S and the fastener 60 to the frame side portion 10 are the same, the fixing method of the magnet unit 5N and the fastener 60 to the frame side portion 10 will be described as a representative. The magnet member 30 is inserted into the storage chamber 42 of the fixing frame 40 with the upper surface 32 facing the fixing frame 40. Thereafter, the magnet member 30 and the fixing frame 40 are inserted into the opening 52 of the yoke 50 with the lower surface 34 facing the yoke 50. Thereafter, for the magnet unit 5N, the fixing frame 40 is inserted into the through hole 12K with the fixing portion 44A inserted into the opening 14A of the frame side portion 10 and the fixing portion 44B inserted into the opening 16 of the frame side portion 10. Similarly, for the magnet unit 5S, the fixing frame 40 is inserted into the through hole 12J with the fixing portion 44A inserted into the opening 14B of the frame side portion 10 and the fixing portion 44B inserted into the opening 16 of the frame side portion 10. Next, with the deformation portion 62A of the fastener 60 being pressed and deformed backward and the deformation portion 62B being pressed and deformed forward, the fastener 60 is inserted into the opening 16 of the frame side portion 10. In this state, by releasing the pressing deformation of the deformation portions 62A and 62B, as shown in Fig. 4, the retaining claw 64A is inserted above the retaining claw 18A of the frame side portion 10, and the retaining claw 64B is inserted above the retaining claw 18B. By inserting the retaining claws 64A and 64B above the retaining claws 18A and 18B, the magnet units 5N and 5S and the fastener 60 are fixed to the frame side portion 10.

[0043] As described above, the magnet units 5N and 5S fixed to the frame side portion 10 are arranged on the upper surface 11 of the frame side portion 10 as shown in FIG. 2 such that the magnetic field directions of the adjacent magnet units 5N and 5S are opposite to each other. Specifically, in the frame side portion 10A, for the magnet unit 5S inserted into the through hole 12A, the S pole is exposed from the upper surface 11 of the frame side portion 10A, and for the magnet unit 5N inserted into the through hole 12B, the N pole is exposed from the upper surface 11. For the magnet unit 5S inserted into the through hole 12C, the S pole is exposed from the upper surface 11, and for the magnet unit 5N inserted into the through hole 12D, the N pole is exposed from the upper surface 11. In the frame side portion 10B, for the magnet unit 5S inserted into the through hole 12E, the S pole is exposed from the upper surface 11 of the frame side portion 10B, and for the magnet unit 5N inserted into the through hole 12F, the N pole is exposed from the upper surface 11. That is, when looking at the frame body 2 from above, the 12 magnet units 5N and 5S are arranged such that the N poles and S poles are alternately exposed in the clockwise direction.

[0044] <<Structure of the holder 3>> The detailed structure of the holder 3 will be described with reference to FIGS. 5 to 7. Since the two types of holders 3A and 3B have the same structure except for the difference in the length in the longitudinal direction as shown in FIG. 1, the holder 3A will be described as a representative. For the holders 3A and 3B, when not specifying each holder or when referring to them generically, they are described as the holder 3. As shown in FIG. 5, the holder 3A includes a holding substrate 70, magnet units 6N and 6S, fasteners 90, and a seal 95. Since the magnet units 6N and 6S have the same configuration as the magnet member 30, the fixed frame 40, and the yoke 50 included in the frame body 2, the same numbers are used for these members and the description is omitted.

[0045] <<Structure of the holding substrate 70>> The holding substrate 70 is formed of a non-magnetic material such as plastic. As shown in FIG. 7, the holding substrate 70 has a substantially L-shaped cross section. The holding substrate 70 includes a base portion 72, a protruding portion 74, and gripping portions 76 and 78. The base portion 72 is a flat plate-like portion extending in the longitudinal direction. As shown in FIG. 6, the lower surface 73 of the base portion 72 is a flat surface. As shown in FIG. 5, two through holes 80A and 80B penetrating in the height direction are formed in the base portion 72. The two through holes 80A and 80B of the base portion 72 are arranged in a row in the longitudinal direction. Since the two through holes 80A and 80B have the same shape, when not specifying each through hole or when generically referring to them, they are described as through hole 80.

[0046] The distance L11 between the center of the through hole 80A and the center of the through hole 80B is equal to the distance L1 between the center of the through hole 12A and the center of the through hole 12B of the frame body 2. The distance L12 between the center of the through hole 80A and the end of the base portion 72 is shorter than the distance L13 between the center of the through hole 80A and the center of the base portion 72. The distance L14 between the center of the through hole 80B and the end of the base portion 72 is equal to the distance L12. The distance L15 between the center of the through hole 80B and the center of the base portion 72 is equal to the distance L13. That is, the two through holes 80A and 80B are arranged line-symmetrically in the longitudinal direction with respect to the center line in the short direction passing through the center of the base portion 72.

[0047] Openings 82 and 84 that open upward in the height direction are formed on the upper surface of the holding substrate 70 and communicate with the through hole 80. Here, the height direction in FIGS. 5 and 7 corresponds to the vertical direction in FIG. 1. Since all the through holes 80 have the same configuration, the through hole 80A will be described as a representative. In the longitudinal direction, the opening 82 is arranged on the center side of the base portion 72 in the through hole 80A, and the opening 84 is arranged on the end side of the base portion 72 in the through hole 80A. The opening 84 is formed across between the through hole 80A and the end of the base portion 72 and is defined by two side walls extending in the longitudinal direction of the base portion 72. Two retaining claws 86 protruding inward of the opening 84 are respectively formed on the two side walls of the base portion 72 that define the opening 84.

[0048] The protrusion 74 extends downward from one end in the short direction of the base 72. An opening 88 opens downward at the central portion in the longitudinal direction of the protrusion 74. As shown in FIG. 7, the gripping portion 76 protrudes in the short direction from the side surface of the central portion of the protrusion 74 where the opening 88 is disposed. That is, the gripping portion 76 protrudes from the side surface of the protrusion 74 in the direction toward the inner region A1. The gripping portion 78 protrudes in the short direction from the other end in the short direction of the base 72. That is, the gripping portion 78 protrudes from the base 72 in the direction away from the inner region A1.

[0049] <Structure of the fastener 90> The fastener 90 is molded into a rectangular shape by a non-magnetic material such as plastic. As shown in FIG. 5, two protrusions 92 and two retaining claws 94 protrude from both ends in the short direction of the fastener 90, respectively. The two protrusions 92 are disposed at the lower end of the fastener 90. The two retaining claws 94 are disposed at the upper end of the fastener 90.

[0050] <Structure of the seal 95> The seal 95 is formed into a thin film shape by a non-magnetic material such as plastic and extends in the longitudinal direction. An adhesive is applied to the lower surface of the seal 95, and precautions for the user such as precautions for handling magnets are printed on the upper surface of the seal 95.

[0051] ≪Assembly of the holder 3≫ The assembly of the holder 3 will be described with reference to FIG. 5. The method of fixing the magnet units 6N and 6S and the fastener 90 to the holding substrate 70 is the same. Since the magnet units 6N and 6S have the same fixing method, the fixing method of the magnet unit 6N and the fastener 90 to the holding substrate 70 will be described as a representative. For the magnet unit 6N, the fixing portion 44A is inserted into the opening 82 of the holding substrate 70, and the fixing portion 44B is inserted into the opening 84 of the holding substrate 70. By inserting them into these openings, the magnet unit 6N is inserted into the through hole 80A. Next, the fastener 90 is inserted into the opening 84 from the longitudinal end of the holding substrate 70. At this time, the fastening claw 94 of the fastener 90 is disposed below the retaining claw 86 of the holding substrate 70, and the retaining claw 86 and the retaining claw 94 are in contact with each other, so that the magnet unit 6N and the fastener 90 are fixed to the holding substrate 70. After the magnet unit 6S is similarly fixed to the holding substrate 70, a seal 95 is attached to the upper surface of the holding substrate 70.

[0052] As described above, the magnet units 6N and 6S fixed to the holding substrate 70 are exposed from the lower surface 73 of the holding substrate 70 as shown in FIG. 6, and the magnetic field directions of the adjacent magnet units 6N and 6S are arranged to be opposite to each other. That is, the magnet unit 6N inserted into the through hole 80A is arranged such that the N pole is exposed from the lower surface 73, and the magnet unit 6S inserted into the through hole 80B is arranged such that the S pole is exposed from the lower surface 73.

[0053] ≪Operation and Function of the Holding Frame 1≫ The operation and function of the holding frame 1 having the configuration described above will be described with reference to FIGS. 2 and 7.

[0054] <Operation of attaching the cloth 8 to the holding frame 1> With the holder 3 removed from the frame body 2, the user places the cloth 8, which is the medium to be held, on the frame body 2 such that the sewing region of the cloth 8 is disposed inside the inner region A1 of the frame body 2 shown in FIG. 2. The sewing region is the region of the cloth 8 where the user desires to perform sewing. After placing the cloth 8 on the frame body 2, the user attaches two holders 3A to the frame side portions 10A and 10C respectively from above the cloth 8 as shown in FIG. 1. Also, the user attaches one holder 3B to the frame side portions 10B and 10D respectively from above the cloth 8. That is, a maximum of six holders 3 can be attached to the frame forming portion 4. Since the postures for attaching the holders 3 to the frame side portions 10 are all the same, the posture for attaching the holder 3A to the frame side portion 10A will be described as a representative. With the protruding portion 74 of the holder 3A disposed in the inner region A1, the holder 3A is disposed on the frame side portion 10A such that the magnet units 5S, 5N of the frame side portion 10A and the magnet units 6N, 6S of the holder 3A face each other. At this time, for the magnet unit 5S of the through hole 12A, the S pole is exposed from the upper surface 11 of the frame side portion 10A, and for the magnet unit 6N of the through hole 80A, the N pole is exposed from the lower surface 73, so a magnetic force that attracts each other is generated. For the magnet unit 5N of the through hole 12B, the N pole is exposed from the upper surface 11 of the frame side portion 10A, and for the magnet unit 6S of the through hole 80A, the S pole is exposed from the lower surface 73, so a magnetic force that attracts each other is generated. Therefore, the magnet units 6N, 6S of the through holes 80A, 80B are accurately positioned by the attracting magnetic force at positions vertically above the magnet units 5S, 5N of the through holes 12A, 12B. The holder 3A and the frame side portion 10A hold the cloth 8 by the attracting magnetic force.

[0055] As shown in FIG. 7, in the state where the frame side portion 10 and the holder 3 hold the cloth 8, the lower end 75 of the protruding portion 74 protrudes below the lower surface 73 of the holding substrate 70, so the lower end 75 presses the cloth 8 downward.

[0056] When the user attempts to place the holder 3 at a position different from the arrangement position of the above-described holder 3 and the frame side portion 10, a repulsive magnetic force is generated between the holder 3 and the frame side portion 10. For example, when the holder 3A is displaced to the right with respect to the arrangement position of the above-described holder 3A and the frame side portion 10A, that is, when the magnet unit 6N of the through-hole 80A shown in FIG. 6 is arranged to be close to the magnet unit 5N of the through-hole 12B shown in FIG. 2, a repulsive magnetic force is generated between the magnet unit 5N and the magnet unit 6N. Therefore, it becomes difficult to place the holder 3 on the frame side portion 10A. Further, with respect to the frame side portion 10A shown in FIG. 2, when the magnet units 5S, 5N of the through-holes 12A, 12B and the magnet units 6S, 6N of the through-holes 80B, 80A are arranged so that the protruding portion 74 of the holder 3A is arranged behind the base portion 72, the magnet unit 5S and the magnet unit 6S face each other, and the magnet unit 5N and the magnet unit 6N face each other. That is, since a repulsive magnetic force is generated between the holder 3A and the frame side portion 10A, it becomes difficult to place the holder 3A on the frame side portion 10A.

[0057] <Operation of removing the cloth 8 from the holding frame 1> When the user removes all the holders 3 from the frame side portion 10, the holding of the cloth 8 by the holding frame 1 is released, and the user can remove the cloth 8 from the holding frame 1. As shown in FIG. 7, the user inserts a fingertip through the opening 88 of the holder 3 and grips the gripping portion 76 while the frame side portion 10 and the holder 3 hold the cloth 8. Alternatively, the user grips the gripping portion 78 that is arranged at an interval above the upper surface 11 of the frame side portion 10. Thereafter, the user moves the holding portion 3 upward with respect to the frame side portion 10, so that the holder 3 is removed from the frame side portion 10.

[0058] ≪Effect of the holding frame 1≫ The S pole of the magnet unit 5S in the through hole 12A and the N pole of the magnet unit 6N in the through hole 80A face each other in the vertical direction, generating an attracting magnetic force. On the other hand, when the holder 3A is displaced to the right with respect to the through hole 12A, the N pole of the magnet unit 5N in the through hole 12B and the N pole of the magnet unit 6N in the through hole 80A approach each other, generating a repulsive magnetic force. That is, since the holder 3A is attached only to a specific position where an attracting magnetic force is generated between the holder 3A and the frame side portion 10A with respect to the frame side portion 10A, the user can easily attach the holder 3A to the specific position, and the cloth 8 can be stretched on the holding frame 1 with an appropriate tension.

[0059] The magnet unit 5S in the through hole 12A is formed by one magnet member 30, and the magnet unit 5N in the through hole 12B arranged at an interval from the through hole 12A is formed by one magnet member 30. In this case, since the amount of magnet members used can be reduced compared to the case where the magnet unit 5S in the through hole 12A and the magnet unit 5N in the through hole 12B are formed by the S pole and the N pole of one magnet member, the holding frame 1 can be manufactured at low cost. Also, since the size of each magnet member can be reduced, it is possible to reduce the occurrence of the magnet member 30 cracking due to local bending stress acting on the frame forming portion 4 when the holder 3 and the frame body 2 are detached and attached.

[0060] When the holder 3 is attached to the frame side portion 10 shown in FIG. 2 in an incorrect posture, specifically, when the protruding portion 74 of the holder 3 is located outside the inner region A1 and the magnet units 5S, 5N of the frame side portion 10 and the magnet units 6S, 6N of the holder 3 face each other in the vertical direction, a repulsive magnetic force is generated between the magnet unit 5S and the magnet unit 6S. Therefore, since the direction of attaching the holder 3 to the frame side portion 10 is uniquely determined in the front-rear direction, it is possible to reduce the user from attaching the holder 3 in the wrong attachment direction.

[0061] For example, consider, as an example, a configuration in which three magnet units 6N1, 6S, and 6N2 are arranged in a row on the holder 3, and three magnet units 5S1, 5N, and 5S2 are arranged in a row on the frame side portion 10 (the figure is omitted). In the configuration of this example, when the holder 3 is attached to the frame side portion 10 in a correct attachment state where the protruding portion 74 of the holder 3 is located inside the inner region A1, the magnet units 5S1, 5N, and 5S2 and the magnet units 6N1, 6S, and 6N2 face each other in the vertical direction, and a magnetic force that attracts each other is generated. However, in the configuration of the example, even when the holder 3 is attached to the frame side portion 10 in an incorrect attachment state where the protruding portion 74 of the holder 3 is located outside the inner region A1, the magnet units 5S1, 5N, and 5S2 and the magnet units 6N2, 6S, and 6N1 face each other in the vertical direction, and a magnetic force that attracts each other is generated. That is, in the configuration of the above example, the user can attach the holder 3 in the wrong attachment direction. On the other hand, in a configuration where an even number of magnet units 6N and 6S are attached to an even number of magnet units 5S and 5N that are the same number as the magnet units 6N and 6S, as in the present embodiment, it is possible to reduce the user from attaching the holder 3 in the wrong attachment direction.

[0062] Also, for example, consider another example where four magnet units 6N1, 6S1, 6N2, and 6S2 are arranged in a row on the holder 3, and four magnet units 5S1, 5N1, 5S2, and 5N2 are arranged in a row on the frame side portion 10 (the figure is omitted). In the configuration of this other example, when the holder 3 is attached to the frame side portion 10 in the correct attachment state where the protruding portion 74 of the holder 3 is located inside the inner region A1, the four magnet units 5S1, 5N1, 5S2, and 5N2 of the frame side portion 10 and the four magnet units 6N1, 6S1, 6N2, and 6S2 of the holder 3 face each other in the vertical direction, and a magnetic force that attracts each other is generated. However, in the configuration of this other example, even when the holder 3 is attached to the frame side portion 10 with a longitudinal shift while the protruding portion 74 of the holder 3 is in a state of being located inside the inner region A1, two of the four magnet units 5N1 and 5S1 of the frame side portion 10 and two of the four magnet units 6S2 and 6N2 of the holder 3 face each other in the vertical direction, and a magnetic force that attracts each other is generated. That is, in the configuration of the above-mentioned other example, the user can attach the holder 3 with an incorrect attachment position in the longitudinal direction of the frame side portion 10. On the other hand, in the configuration where the smallest two magnet units 6N and 6S among the even numbers are attached to the two magnet units 5S and 5N as in the present embodiment, it is possible to reduce the user from attaching the holder 3 with an incorrect attachment position.

[0063] In a state where the holder 3 is attached to the frame side portion 10, the gripping portions 76 and 78 are formed to protrude in the short direction from the frame side portion 10, or the gripping portion 78 is formed to be spaced upward from the upper surface 11 of the frame side portion 10. The user can easily remove the holder 3 from the frame side portion 10 by gripping the gripping portions 76 and 78.

[0064] In the frame side portion 10A, the distance L3 is shorter than the distance L1. That is, since the magnet unit 5S of the through hole 12A is arranged closer to the end than the center of the frame side portion 10A, the portion of the cloth 8 located near the end of the frame side portion 10A can be held by the holder 3A and the frame side portion 10A. Therefore, the portion of the cloth 8 located near the end of the frame side portion 10A can also be extended to the holding frame 1 with appropriate tension.

[0065] Since the distance L1 of the frame side portion 10A, the distance L2, and the distance L11 of the holder 3A are equal, the holder 3A can be attached not only to the magnet units 5S and 5N of the through holes 12A and 12B but also to the magnet units 5S and 5N of the through holes 12C and 12D.

[0066] When six holders 3, which is the maximum number that can be attached to the frame forming portion 4, are attached, the cloth 8 can be held over a wide range by the six holders 3 and the frame forming portion 4. Therefore, the cloth 8 can be extended to the holding frame 1 with appropriate tension.

[0067] Since the upper surface 11 of the frame side portion 10 and the lower surface 32 of the holder 3 are planes parallel in the front-rear direction and the left-right direction, the thickness of the frame side portion 10 in the vertical direction and the thickness of the holder 3 in the vertical direction can be made thinner compared to the case where the upper surface 11 and the lower surface 32 are planes extending in a direction intersecting the front-rear direction or the left-right direction. Therefore, with the cloth 8 held by the frame side portion 10 and the holder 3, the user can easily insert the holding frame 1 between the bed portion of the sewing machine and the presser foot that moves up and down.

[0068] Since the magnet units 5S and 5N are fixed to the frame side portion 10 with the fastener 60, the thickness of the frame side portion 10 in the vertical direction can be made thinner compared to the case where the magnet units 5S and 5N are fixed to the frame side portion 10 with screws. Since the magnet units 6S and 6N are fixed to the holding substrate 70 with the fastener 90, the thickness of the holder 3 in the height direction can be made thinner compared to the case where the magnet units 6S and 6N are fixed to the holding substrate 70 with screws. Therefore, with the cloth 8 held by the frame side portion 10 and the holder 3, the user can easily insert the holding frame 1 between the bed portion of the sewing machine and the presser foot that moves up and down.

[0069] At 3 A, the distance L12 is shorter than the distance L13. That is, since the magnet unit 6N of the through hole 80A is arranged closer to the end than the center of the holder 3A, the portion of the cloth 8 located near the end of the holder 3A can be held by the holder 3A and the frame side portion 10A. Therefore, the portion of the cloth 8 located near the end of the holder 3A can also be stretched on the holding frame 1 with appropriate tension.

[0070] [Modification Example] The present invention is not limited to the present embodiment, and various modifications can be made without departing from the spirit thereof.

[0071] (1) In the present embodiment, as shown in FIGS. 2 and 6, the two magnet units 6N and 6S of the holder 3 are attached to the two magnet units 5S and 5N of the frame side portion 10. However, the holder 3 may include three or more magnet units 6N and 6S, and the holder 3 may be attached to three or more magnet units 5S and 5N of the frame side portion 10. Also in this configuration, in the frame side portion 10 and the holder 3, since the magnetic field directions of the adjacent magnet units 5N, 5S, 6N, and 6S are arranged in opposite directions, when the holder 3 is displaced in the longitudinal direction with respect to the frame side portion 10, the magnet units 6N and 6S of the holder 3 and the magnet units 5N and 5S of the frame side portion 10 face each other in the vertical direction, and a repulsive magnetic force is generated. That is, since the holder 3 is attached only to a specific position where a magnetic force attracting between the holder 3 and the frame side portion 10 is generated with respect to the frame side portion 10, the user can easily attach the holder 3 to the specific position, and the cloth 8 can be easily stretched on the holding frame 1 with appropriate tension.

[0072] (2) In this embodiment, as shown in FIGS. 2 and 6, the two magnet units 6N and 6S of the holder 3 were attached to the two magnet units 5S and 5N of the frame side portion 10. However, the holder 3 may include four or more even-numbered magnet units 6N and 6S, and the holder 3 may be attached to four or more even-numbered magnet units 5S and 5N of the frame side portion 10. Also in this configuration, the protruding portion 74 is located further rearward than the base portion 72. When the magnet units 5S and 5N of the frame side portion 10 and the magnet units 6N and 6S of the holder 3 face each other in the vertical direction, a repulsive magnetic force is generated between the magnet units 5S and 5N of the frame side portion 10 and the magnet units 6N and 6S of the holder 3. Therefore, in the front-rear direction, since the direction of attaching the holder 3 to the frame side portion 10 is uniquely determined, it is possible to reduce the possibility that the user attaches the holder 3 in the wrong attachment direction.

[0073] (3) In this embodiment, as shown in FIGS. 2 and 6, the two magnet units 6N and 6S of the holder 3 were attached to the two magnet units 5S and 5N of the frame side portion 10. However, the holder 3 may include three magnet units 6N, 6N, and 6S in this order, and the holder 3 may be attached to the three magnet units 5S, 5S, and 5N of the frame side portion 10. Also, all of the plurality of magnet units provided in the holder 3 may be magnet units 6N, and all of the plurality of magnet units provided in the frame side portion 10 may be magnet units 5S. That is, only the N pole may be exposed from the lower surface 73 of the holder 3, and only the S pole may be exposed from the upper surface 11 of the frame side portion 10, and the holder 3 may be attached to the frame side portion 10. Also in such a configuration, the holder 3 is attached to the frame side portion 10 only at a specific position where a magnetic force that attracts between the holder 3 and the frame side portion 10 is generated. Therefore, the user can easily attach the holder 3 to the specific position, and can easily stretch the cloth 8 on the holding frame 1 with an appropriate tension.

[0074] (4) In this embodiment, as shown in FIG. 2, the magnet units 5N and 5S exposed from the upper surface 11 of the frame side portion 10 are each constituted by one magnet member 30. However, like the frame 102 shown in FIG. 8, the S pole and the N pole of the magnet unit 105 exposed from the upper surface 111 of the frame side portion 110 may be formed by one magnet member. In the vertical direction, which is the direction orthogonal to the upper surface 111, the direction of the magnetic field generated by the S pole of the magnet unit 105 and the direction of the magnetic field generated by the N pole of the magnet unit 105 are opposite to each other. In this case, compared with the frame 2, the number of magnet members, the number of fixing frames, the number of yokes, and the number of fasteners are reduced. Therefore, since the number of parts is reduced, the frame 102 can be easily manufactured. Further, in this embodiment, as shown in FIG. 6, the N pole and the S pole exposed from the lower surface 73 of the holder 3 are each constituted by one magnet member 30. However, the N pole and the S pole exposed from the lower surface of the holder may be formed by one magnet member. In this case, compared with the holder 3, the number of magnets, the number of fixing frames, the number of yokes, and the number of fasteners are reduced. Therefore, since the number of parts is reduced, the holder can be easily manufactured.

[0075] (5) In this embodiment, as shown in FIG. 1, a plurality of holders 3 were attached to the frame forming portion 4, but one holder formed in the same annular shape as the frame forming portion 4 may be attached to the frame forming portion 4. Also, as shown in FIG. 1, the holder 3 was configured to be attached to a plurality of magnet units 5S and 5N on one frame side portion 10. However, as shown in FIG. 9, in the holder 203 formed in the same annular shape as the frame forming portion, one magnet unit 206S and 206N may be respectively arranged on the lower surfaces 273A and 273C extending in the longitudinal direction. In this case, the magnet unit 206S arranged on the lower surface 273A may be arranged such that the S pole is exposed from the lower surface 273A, and the magnet unit 206N arranged on the lower surface 273C may be arranged such that the N pole is exposed from the lower surface 273C. Also, one magnet unit 206N and 206S may be respectively arranged on the lower surface 273B and the lower surface 273D. Regarding the frame forming portion to which the holder 203 is attached, one magnet unit may be arranged on one frame side portion. Even in such a case, since the holder 203 is attached to the frame forming portion only at a specific position where a magnetic force attracting between the holder 203 and the frame side portion is generated, the user can easily attach the holder 203 to the specific position, and can easily stretch the cloth 8 on the holding frame 1 with an appropriate tension.

[0076] (6) In this embodiment, as shown in FIG. 2, the sum of the distance L8 and the distance L10 was longer than the distance L1, but the sum of the distance L8 and the distance L10 may be equal to the distance L1. In this case, since the holder 3A can be attached to the frame side portions 10B and 10D, there is no need to manufacture holders 3B having different lengths in the longitudinal direction. Also, since the user can attach the holder 3A to either of the frame side portions 10A and 10B, the attachment mistake of the holder 3 can be suppressed as compared with the case where there are holders 3A and 3B having different lengths.

[0077] (7) In this embodiment, as shown in FIG. 1, the fixture 3 was attached to the rectangular frame forming portion 4. However, the shape of the frame forming portion may be a polygonal shape such as a triangle or a pentagon, a circular shape, or an annular shape such as an ellipse. Also, although the frame side portion 10 was configured to extend linearly, it may be curved. In the case of a curved frame side portion, the fixture 3 may also be formed in a curved shape according to the shape of the frame side portion.

[0078] (8) In this embodiment, as shown in FIG. 1, the upper surface 11 of the frame forming portion 4 and the lower surface 73 of the holding portion 3 hold the cloth 8. However, in the frame body 302 shown in FIG. 10, on the upper surface 11 of the frame forming portion 4, an anti-slip portion 100 made of a material that generates a large friction such as an adhesive sheet such as urethane gel, a lint brush, or rubber may be disposed. In the frame body 302, the same components as those of the frame body 2 shown in FIG. 1 are illustrated with the same reference numerals. An anti-slip portion 100 may be disposed on the lower surface 73 of the fixture 3. By disposing the anti-slip portion 100, in the state where the cloth 8 is held between the fixture 3 and the frame forming portion 4, not only the attracting magnetic force between the magnet units 6N and 6S of the fixture 3 and the magnet units 5S and 5N of the frame forming portion 4, but also the friction between the anti-slip portion 100 and the cloth 8 causes the cloth 8 to be held by the holding frame 1, and the state of stretching the cloth 8 with an appropriate tension can be easily maintained. Also, the anti-slip portion 100 may be disposed on the upper surface 11 of the connecting portion 20 or the upper surface 11 near the end of the frame side portion 10. Since the connecting portion 20 has a largely bent shape, the fixture 3 cannot be attached to the upper surface 11 of the connecting portion 20 or the upper surface 11 near the end of the frame side portion 10. Therefore, due to the friction between the anti-slip portion 100 and the cloth 8, the cloth 8 is held by the holding frame 1, and the state of stretching the cloth 8 with an appropriate tension can be easily maintained. On the upper surface 11 of the frame forming portion 4, the surface of the anti-slip portion 100 and the surfaces of the magnet units 5S and 5N may be arranged flush. On the lower surface 73 of the fixture 3, the surface of the anti-slip portion 100 and the surfaces of the magnet units 6S and 6N may be arranged flush.

[0079] (9) In this embodiment, as shown in FIG. 7, the holding frame 1 is configured to hold the cloth 8. However, as the medium to be held, leather, a resin sheet, or paper may be held by the holding frame 1. Further, although the holding frame 1 holding the medium to be held is attached to a sewing machine and is configured to be sewn onto the medium to be held, the holding frame 1 holding the medium to be held may be attached to a printer and an image may be printed on the medium to be held. Further, the holding frame 1 holding the medium to be held may be attached to a cutting device and the medium to be held may be cut based on drawing data. That is, it is sufficient that the holding frame 1 holding the medium to be held is attached to a processing device and the processing device processes the medium to be held.

[0080] The holding frame 1 of this embodiment is an example of the holding frame of the present invention. The inner region A1 of this embodiment is an example of the inner region of the present invention. The frame forming portion 4 of this embodiment is an example of the frame forming portion of the present invention. The upper surface 11 of this embodiment is an example of the mounting surface of the present invention. The frame side portion 10 of this embodiment is an example of the frame side portion of the present invention. The connecting portion 20 of this embodiment is an example of the connecting portion of the present invention. The magnet member 30 of the frame side portion 10 in this embodiment is an example of the frame magnet member of the present invention. The magnet units 5N and 5S of this embodiment are an example of the first magnetic field generating portion of the present invention. The holder 3 of this embodiment is an example of the holder of the present invention. The lower surface 73 of this embodiment is an example of the holding surface of the present invention. The magnet member 30 of the holder 3 in this embodiment is an example of the holding magnet member of the present invention. The magnet units 6N and 6S exposed from the lower surface 73 of this embodiment are an example of the second magnetic field generating portion of the present invention. The protruding portion 74 of this embodiment is an example of the protruding portion of the present invention. The gripping portions 76 and 78 of this embodiment are examples of the gripping portions of the present invention. The anti-slip portion 100 of this embodiment is an example of the anti-slip portion of the present invention. The left-right direction, front-rear direction, longitudinal direction, and short-side direction of this embodiment are examples of the directions in which the medium to be held of the present invention is extended. The left-right direction or the front-rear direction of this embodiment is an example of the frame extension direction. The longitudinal direction of this embodiment is an example of the holder extension direction of the present invention. The distances L4, L6, L8, and L10 of this embodiment are examples of the distances between the center of the frame forming portion and the first magnetic field generating portion of the present invention. The distances L3, L5, L7, and L9 of this embodiment are examples of the distances between the end of the frame forming portion and the first magnetic field generating portion of the present invention. The distances L12 and L14 of this embodiment are examples of the distances between the end of the holder and the second magnetic field generating portion of the present invention. The distances L13 and L15 of this embodiment are examples of the distances between the center of the holder and the second magnetic field generating portion of the present invention.

Explanation of Signs

[0081] 1 Holding frame 2, 102, 302 Frame body 3, 203 Holder 4 Frame forming portion 5N, 5S, 6N, 6S, 105, 206S, 206N Magnet unit 7 Mounting portion of sewing machine 10 and 110 Frame Edge Parts 11 and 111 Upper Surfaces 12 and 80 Through-Holes 20 Connecting Part 30, 130, and 230 Magnet Members 40 Fixed Frame 50 Yoke 60 and 90 Fasteners 70 Holding Substrate 72 Base Portion 73 and 273 Lower Surfaces 74 Protrusion 76 and 78 Gripping Parts 100 Anti-Slip Portion A1 Inner Region L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L12, L13, L14, L15 Distances

Claims

1. A holding frame for holding a medium to be held, comprising: an annular frame forming portion having a placement surface on which the medium to be held is placed and an even number of frame magnet members arranged at intervals along the placement surface; a plurality of holders having a holding surface that sandwiches the medium to be held between the holding surface and two holding magnet members arranged at intervals along the holding surface; The frame forming portion has an even number of first magnetic field generating portions that generate a magnetic field by the even number of frame magnet members, The frame magnet members are arranged in the frame forming portion such that the magnetic field directions of adjacent first magnetic field generating portions are opposite to each other on the placement surface, The holder has two second magnetic field generating portions that generate a magnetic field by the two holding magnet members, The holding magnet members are arranged in the holder such that the magnetic field directions of adjacent second magnetic field generating portions are opposite to each other on the holding surface, The distance between two adjacent holding magnet members is equal to the distance between two adjacent frame magnet members, A holding frame in which the first magnetic field generating portion and the second magnetic field generating portion face each other and the magnetic field directions of the first magnetic field generating portion and the second magnetic field generating portion are the same when the holder is attached to the frame forming portion.

2. The frame forming portion defines an inner region that extends in the direction in which the medium to be held is extended, The holder has a protruding portion, The holding surface is a surface that extends parallel to the direction in which the medium to be held is extended when the holder is attached to the frame forming portion, The protruding portion extends toward the inner region of the frame forming portion in a direction intersecting the direction in which the medium to be held is extended when the holder is attached to the frame forming portion. The holding frame according to claim 1.

3. The frame forming portion defines an inner region that extends in the direction in which the medium to be held is extended, The holder has at least one gripping portion, When the holder is attached to the frame forming portion, the at least one gripping portion is formed in a shape that protrudes in a direction parallel to the direction in which the medium to be held is extended with respect to the frame forming portion, or in a shape that is spaced above the placement surface of the frame forming portion. The holding frame according to claim 1 or 2.

4. The holder has a plurality of gripping portions, The plurality of gripping portions include a first gripping portion and a second gripping portion, When the holder is attached to the frame forming portion, the first gripping portion is formed in a shape that protrudes in a direction parallel to the direction in which the medium to be held is extended with respect to the frame forming portion, and the second gripping portion is formed in a shape that is spaced above the placement surface of the frame forming portion. The holding frame according to claim 3.

5. ​ The holding frame according to any one of claims 1 to 4, wherein an anti-slip portion that generates a greater friction than the friction generated between the mounted medium and the mounting surface of the frame forming portion is disposed on the mounting surface of the frame forming portion.

6. The holder extends along the holder extending direction along the frame forming portion in a state where the holder is attached to the frame forming portion. The holding frame according to any one of claims 1 to 5, wherein at least one specific second magnetic field generating portion among the two second magnetic field generating portions is disposed at a position where the distance between the end of the holder and the center of the specific second magnetic field generating portion is shorter than the distance between the center of the holder and the center of the specific second magnetic field generating portion in the holder extending direction.

7. The frame forming portion has a plurality of frame side portions and a plurality of connecting portions. A plurality of first magnetic field generating portions are disposed on each frame side portion. Each connecting portion of the plurality of connecting portions connects the ends of two adjacent frame side portions among the plurality of frame side portions. The two frame side portions connected to each connecting portion extend in frame extending directions that are different from each other. The holding frame according to any one of claims 1 to 6, wherein at least one specific first magnetic field generating portion among the plurality of first magnetic field generating portions disposed on a specific frame side portion among the plurality of frame side portions is such that the distance between the end of the specific frame side portion connected to each connecting portion and the center of the specific first magnetic field generating portion is shorter than the distance between the center of the specific frame side portion and the center of the specific first magnetic field generating portion in the frame extending direction of the specific frame side portion.

8. The total length of the longitudinal lengths of the plurality of holders is less than or equal to the length of the outer periphery of the frame forming portion. The holding frame according to any one of claims 1 to 7, wherein the frame forming portion has the same number of first magnetic field generating portions as the total number of second magnetic field generating portions of the plurality of holders.

9. A holding frame for holding a mounted medium, an annular frame forming portion having a mounting surface on which the mounted medium is placed and a plurality of frame magnet members arranged at intervals along the mounting surface, a plurality of holders having a holding surface that sandwiches the mounted medium between the holding surface and a plurality of holding magnet members arranged at intervals along the holding surface, comprising: The frame forming portion has a plurality of first magnetic field generating portions that generate a magnetic field by a plurality of frame magnet members. The frame magnet members are arranged on the frame forming portion such that the magnetic field directions of adjacent first magnetic field generating portions are opposite to each other on the mounting surface. The holder has a plurality of second magnetic field generating portions that generate a magnetic field by a plurality of holding magnet members. The holding magnet members are arranged on the holder such that the magnetic field directions of adjacent second magnetic field generating portions are opposite to each other on the holding surface. The distance between two adjacent holding magnet members is equal to the distance between two adjacent frame magnet members. In a state where the holder is attached to the frame forming portion, the first magnetic field generating portion and the second magnetic field generating portion face each other, and the direction of the magnetic field of the first magnetic field generating portion is the same as the direction of the magnetic field of the second magnetic field generating portion. The holder extends along the holder extending direction along the frame forming portion in a state where the holder is attached to the frame forming portion. At least one specific second magnetic field generating portion among the plurality of second magnetic field generating portions is a holding frame arranged at a position where the distance between the end portion of the holder and the center of the specific second magnetic field generating portion is shorter than the distance between the center of the holder and the center of the specific second magnetic field generating portion in the holder extending direction.

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