Bending jig and bending method

Abstract

The present invention provides a bending jig and a bending method. The bending jig includes a circulation module, a cover plate and a bending module. The top surface of the circulation module is provided with a positioning portion, the positioning portion is used to position a stator and a flexible circuit board coil arranged on the outer peripheral side of the stator, the cover plate is arranged on the circulation module, and a part of the cover plate presses against the top surface of the stator. The bending module includes a base and a bending assembly arranged on the base. The circulation module is arranged on the base. Along the width direction of the circulation module, the bending assembly has a positioning protrusion and a bending structure arranged on at least one side of the positioning portion, the positioning protrusion is used to press against the part to be bent of the flexible circuit board coil to achieve pre-bending, and the bending structure is rotatably arranged on the positioning protrusion, and the bending structure rotates to drive the part to be bent to bend to the inside of the stator slot of the stator. The bending jig and the bending method provided by the present invention can solve the problems that the jig in the prior art has complex operation, affects the assembly efficiency, and has poor applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of jigs, and in particular to a bending jig and a bending method. Background Art

[0002] In mobile devices such as mobile phones and cameras, the integration of variable aperture motors (VAM) is becoming increasingly higher, and the requirements for the accuracy and reliability of internal components are becoming increasingly stringent. The variable aperture motor is used to control the aperture size of the camera lens to meet the shooting needs under different lighting conditions. Among them, FPC-Coil (flexible circuit board coil) is a key driving component in the variable aperture motor. The bending mechanism on the FPC-Coil is a key component in the variable aperture motor, which is used to adjust the opening and closing position of the aperture blades and accurately control the amount of light entering. The bending accuracy of the FPC-Coil directly affects the movement performance of the aperture blades, and thus affects the imaging effect of the camera.

[0003] Traditional FPC-Coil assembly jigs usually include a single fixed bending mechanism, which is suitable for FPC-Coil of specific specifications. During the application process, the FPC-Coil needs to be pre-bent first, and then the pre-bent FPC-Coil is bent through the jig, which is complicated to operate. In addition, with the diversification of product size and function, a single jig cannot meet the assembly requirements of different specifications.

[0004] As can be seen from the above, the jigs in the prior art have the problems of complicated operation, which affects the assembly efficiency, and poor applicability. Summary of the invention

[0005] The main purpose of the present invention is to provide a bending jig and a bending method to solve the problems that the jig in the prior art has complex operation, affects assembly efficiency, and has poor applicability.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a bending jig is provided, the bending jig comprising a circulation module, a cover plate and a bending module, the top surface of the circulation module is provided with a positioning portion, the positioning portion is used to position the stator and the flexible circuit board coil arranged on the outer peripheral side of the stator, the cover plate is arranged on the circulation module, part of the cover plate presses against the top surface of the stator, the bending module comprises a base and a bending assembly arranged on the base, the circulation module is arranged on the base, along the width direction of the circulation module, the bending assembly has a positioning protrusion and a bending structure arranged on at least one side of the positioning portion, the positioning protrusion is used to press against the to-be-bent portion of the flexible circuit board coil to achieve pre-bending, the bending structure is rotatably arranged on the positioning protrusion, and the bending structure rotatably drives the to-be-bent portion to be bent to the inside of the stator slot of the stator.

[0007] Furthermore, positioning protrusions and bending structures are provided on both sides of the positioning portion; and / or the positioning portion and the bending component are provided in one-to-one correspondence, and a plurality of bending components are provided, and the plurality of bending components are arranged at intervals along the length direction of the circulation module.

[0008] Furthermore, the bending assembly also includes a mounting plate, the mounting plate is arranged on the base, the circulation module is arranged on the mounting plate, and the positioning protrusion is fixedly arranged on the mounting plate.

[0009] Furthermore, the bending assembly also includes a connecting plate arranged on the top surface of the mounting plate and extending along the width direction of the circulation module, and the positioning protrusion is formed at least at one end of the connecting plate.

[0010] Furthermore, a first magnetic component is provided on the top surface of the mounting plate, and a second magnetic component is provided on the bottom surface of the circulation module, and the first magnetic component and the second magnetic component are magnetically matched; and / or the base has one of the positioning bosses and the positioning groove, and the bottom surface of the circulation module has the other of the positioning bosses and the positioning groove, and the positioning bosses and the positioning grooves are plug-fitted; and / or the base has a plurality of limiting bosses, and the limiting bosses abut against the outer peripheral surface of the circulation module.

[0011] Furthermore, the bending structure includes a rotating block, a rotating member and a pressing structure. The rotating block is rotatably connected to the positioning protrusion through the rotating member. The pressing structure is arranged on the side of the rotating block facing the positioning portion. The pressing structure is used to press the part to be bent of the pre-bent flexible circuit board coil.

[0012] Furthermore, the pressing structure includes a first pressing portion and a second pressing portion, the first pressing portion being movably arranged on the rotating block, the first pressing portion being used to abut against a large surface of the part to be bent, the second pressing portion being movably arranged on the rotating block, the second pressing portion being arranged on a side of the first pressing portion away from the base, and the second pressing portion having an abutting surface for abutting against an end of the part to be bent away from the bending area.

[0013] Furthermore, a first mounting groove is provided on the rotating block, and the first pressing portion includes a first elastic member and a first pressure block. The first elastic member is arranged inside the first mounting groove, and the first pressure block is slidably arranged inside the first mounting groove. The first elastic member is arranged between the first pressure block and the rotating block, and the first elastic member provides driving force for the first pressure block to extend out of the first mounting groove and abut against the part to be bent.

[0014] Furthermore, the second pressing portion includes a second elastic member and a second pressure block, the second pressure block is rotatably arranged on the rotating block, the second pressure block is arranged on the part of the rotating block facing the positioning portion to form an abutment surface facing the part to be bent, the second elastic member is arranged between the second pressure block and the rotating block, and the second elastic member provides driving force for the second pressure block to squeeze the part to be bent.

[0015] Furthermore, the bending jig also includes a first magnetic member and a second magnetic member. The first magnetic member is arranged on the flow module and is located on at least one side of the positioning portion along the width direction of the flow module. The second magnetic member is arranged on the side of the rotating block facing the positioning portion. The first magnetic member and the second magnetic member are arranged opposite to each other, and the first magnetic member and the second magnetic member attract each other. The first magnetic member provides suction for the rotating block to keep pressing against the part to be bent.

[0016] Furthermore, the bending jig also includes a third magnetic part and a fourth magnetic part. The third magnetic part is arranged on the mounting plate, and the fourth magnetic part is arranged on the bottom surface of the rotating block. The third magnetic part and the fourth magnetic part attract each other, and the suction force between the third magnetic part and the fourth magnetic part is smaller than the suction force between the first magnetic part and the second magnetic part.

[0017] Furthermore, the cover plate is arranged on the top side of the circulation module, and the positioning portion includes a groove structure opening toward one side of the cover plate and a protrusion structure arranged on the bottom surface of the groove structure, the inner circumference of the groove structure abuts the outer circumference of the stator, and the protrusion structure abuts the inner circumference of the stator.

[0018] Furthermore, a third magnetic attraction member for magnetically engaging with the stator is provided inside the slot structure.

[0019] Furthermore, the circulation module has a hollow part, the part to be bent of the flexible circuit board coil is located in the hollow part, the positioning protrusion and the bending structure pass through the hollow part and abut against the part to be bent; and / or the cover plate has an avoidance groove for avoiding the bending structure.

[0020] Furthermore, the cover plate includes a plate body, a floating block, a third elastic member and a support pin. The plate body is connected to the circulation module. The plate body has a limiting groove opening toward one side of the positioning portion. The floating block is at least partially slidably arranged inside the limiting groove, and at least another part can extend out of the limiting groove to abut against the stator. The end of the floating block facing away from the circulation module has a slide groove. The third elastic member is arranged between the limiting groove and the floating block. The third elastic member provides a driving force for the floating block to extend out of the limiting groove. The support pin is arranged on the plate body, and part of the support pin extends into the interior of the slide groove and slidably cooperates with the slide groove.

[0021] Furthermore, a plurality of third elastic members are provided, and the plurality of third elastic members are symmetrically arranged on both sides of the supporting pin.

[0022] Further, along the length direction of the circulation module, two ends of the cover plate are snap-fitted with the circulation module; and / or the cover plate and the circulation module are fixedly connected by fasteners.

[0023] Furthermore, the top surface of the circulation module has one of the limiting column and the limiting hole, the cover plate has the other of the limiting column and the limiting hole, and the limiting column and the limiting hole cooperate with each other in a limiting manner; and / or the top surface of the circulation module and the bottom surface of the cover plate are magnetically connected via a fourth magnetic component.

[0024] According to another aspect of the present invention, a bending method is provided, wherein the bending method applies the above-mentioned bending jig, and the bending method comprises:

[0025] Positioning the stator and the flexible circuit board coil, and placing the positioning stator and the flexible circuit board coil in the positioning part of the circulation module;

[0026] Install the cover plate, which is connected to the circulation module to form an integral installation, and the cover plate abuts against the top of the stator;

[0027] Pre-bending: the installation unit is set on the bending module, and the positioning protrusion of the bending module presses against the part of the flexible circuit board coil to be bent, so as to achieve a preset bending angle of the part to be bent;

[0028] Bending: the bending structure of the bending module rotates to drive the pre-bent part to be bent to the inside of the stator slot of the stator;

[0029] After holding for a preset time, the bending structure is separated from the flexible circuit board coil by rotating.

[0030] Furthermore, the bending method also includes:

[0031] Gluing, pre-bending the inner glue coating of the forward stator slot;

[0032] Bonding: after bending, the part to be bent is bonded and fixed with the colloid;

[0033] Thermal fixing: after bending, the bent part is fixed inside the stator slot by baking.

[0034] According to the technical solution of the present invention, the bending jig includes a circulation module, a cover plate and a bending module. The top surface of the circulation module is provided with a positioning portion, the positioning portion is used to position the stator and the flexible circuit board coil arranged on the outer peripheral side of the stator, the cover plate is arranged on the circulation module, and part of the cover plate presses against the top surface of the stator. The bending module includes a base and a bending assembly arranged on the base. The circulation module is arranged on the base. Along the width direction of the circulation module, the bending assembly has a positioning protrusion and a bending structure arranged on at least one side of the positioning portion, the positioning protrusion is used to press against the part to be bent of the flexible circuit board coil to achieve pre-bending, and the bending structure is rotatably arranged on the positioning protrusion, and the bending structure rotatably drives the part to be bent to be bent to the inside of the stator slot of the stator.

[0035] From the above, it can be seen that the bending jig of the present application adopts a circulation module to position and support the stator and the flexible circuit board coil, which can realize front operation of the flexible circuit board coil, and is convenient to operate; and the present application adopts a cover plate to press on the top of the stator, and further realizes the height direction clamping and positioning of the stator through the structural coordination of the circulation module and the cover plate, further ensuring the stability of the installation of the stator and the flexible circuit board coil, and avoiding the phenomenon of offset during the bending action that affects the bending accuracy.

[0036] The bending jig used in the present application uses a positioning protrusion on the bending module to press against the part to be bent, so that the part to be bent is bent at a preset angle to achieve pre-bending, and then the pre-bent part to be bent can be bent through the bending structure. The entire bending action of the present application is completed by the jig, and there is no need to replace the jig or manual participation, thereby avoiding the waste of labor costs and the problem of affecting the bending accuracy. The setting of the jig of the present application is conducive to improving the bending efficiency and ensuring the bending accuracy, thereby improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0038] Figure 1 A schematic diagram of the three-dimensional structure of the bending jig of the present invention is shown, wherein the part to be bent is in a pre-bending position;

[0039] Figure 2 Shows Figure 1 A magnified view of point B;

[0040] Figure 3 A schematic diagram of the three-dimensional structure of the bending jig of the present invention is shown, wherein the portion to be bent is located inside the stator slot;

[0041] Figure 4 Shows Figure 3 Enlarged view of point C;

[0042] Figure 5 A schematic diagram of the three-dimensional structure of the bending jig of the present invention is shown, wherein the part to be bent is in a position where the bending is completed;

[0043] Figure 6 Shows Figure 5 The enlarged view of point D;

[0044] Figure 7 A schematic diagram showing the structure of the cover plate and the circulation module of the present invention in cooperation with each other;

[0045] Figure 8A schematic diagram of the three-dimensional structure of the circulation module of the present invention is shown;

[0046] Fig. 9 A top view of the flow module of the present invention is shown;

[0047] Fig.10 A bottom view of the flow module of the present invention is shown;

[0048] Fig.11 An exploded view of the cover plate of the present invention is shown;

[0049] Fig.12 A side view of the cover plate of the present invention is shown;

[0050] Fig.13 A bottom view of the cover plate of the present invention is shown;

[0051] Fig.14 A bottom view of the cover plate of the present invention is shown;

[0052] Fig.15 An exploded view of the bending module of the present invention is shown;

[0053] Fig.16 A bottom view of the bending module of the present invention is shown;

[0054] Fig.17 Shows Fig.16 AA section view in the figure;

[0055] Fig.18 A three-dimensional structural schematic diagram of the bending structure of the present invention is shown.

[0056] The above drawings include the following reference numerals:

[0057] 10. circulation module; 110. positioning part; 120. card slot; 130. limiting column; 140. hollow part; 150. positioning slot; 160. circular slot; 20. cover plate; 210. plate body; 211. avoidance slot; 220. floating block; 230. third elastic member; 240. support pin; 250. buckle; 260. limiting hole; 30. bending module; 310. base; 311. limiting convex column ; 320, bending assembly; 321, mounting plate; 322, positioning protrusion; 323, connecting plate; 324, rotating block; 325, first pressing portion; 326, second pressing portion; 327, rotating member; 328, positioning protrusion; 329, cylinder; 40, first magnetic member; 50, second magnetic member; 60, fourth magnetic member; 70, sixth magnetic member; 80, portion to be bent; 90, fifth magnetic member. DETAILED DESCRIPTION

[0058] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0059] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0060] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0061] Embodiment 1

[0062] In order to solve the problems in the prior art that the jig is complicated to operate and affects the assembly efficiency, and has poor applicability, the present application provides a bending jig, which is used to bend the part to be bent on the FPC-Coil (flexible circuit board coil) of the variable aperture motor to the inside of the stator slot of the variable aperture motor stator.

[0063] Among them, the stator is an annular structure, and a stator slot for placing the part to be bent is formed on its outer wall surface. The flexible circuit board coil has a strip part set on the jig and an annular part pasted on the stator. The part to be bent is set on the annular part and extends along the side away from the center of the ring.

[0064] like Figures 1 to 8 As shown, the bending fixture includes a circulation module 10, a cover plate 20 and a bending module 30. The top surface of the circulation module 10 is provided with a positioning portion 110, the positioning portion 110 is used to position the stator and the flexible circuit board coil arranged on the outer peripheral side of the stator, the cover plate 20 is arranged on the circulation module 10, and a portion of the cover plate 20 presses against the top surface of the stator. The bending module 30 includes a base 310 and a bending component 320 arranged on the base 310. The circulation module 10 is arranged on the base 310. Along the width direction of the circulation module 10, the bending component 320 has a positioning protrusion 322 and a bending structure arranged on at least one side of the positioning portion 110. The positioning protrusion 322 is used to press against the to-be-bent portion 80 of the flexible circuit board coil to achieve pre-bending. The bending structure is rotatably arranged on the positioning protrusion 322, and the bending structure rotates to drive the to-be-bent portion 80 to be bent to the inside of the stator slot of the stator.

[0065] In order to improve the stability of the connection between the part to be bent 80 and the bottom surface of the stator slot, after the stator and the flexible circuit board are positioned at the positioning part 110, the glue can be applied to the inside of the stator slot. After the bending is completed, the part to be bent 80 is set inside the stator slot by gluing. In order to improve assembly efficiency and save time, the thermal fixation of the glue can be accelerated by baking.

[0066] Specifically, the bending jig of the present application uses the positioning portion 110 on the circulation module 10 to position and support the stator and the flexible circuit board coil to fix the stator and the flexible circuit board coil, and the positioning portion 110 is formed on the top surface of the circulation module 10, so the present application can realize front-side operation of the flexible circuit board coil, which is convenient for operation.

[0067] The structure includes a slot structure opening toward one side of the cover plate 20 and a protrusion structure arranged on the bottom surface of the slot structure. The inner circumference of the slot structure abuts against the outer circumference of the stator, and the protrusion structure abuts against the inner circumference of the stator. By arranging part of the stator inside the slot structure and limiting the stator by the protrusion structure and the inner circumference of the slot structure, the stator is fixed on the circulation module 10, and then the annular part of the flexible circuit board coil is attached to the stator, and the long strip part of the flexible circuit board coil is attached to the top surface of the circulation module 10, so as to complete the fixing of the stator and the flexible circuit board coil.

[0068] In order to further fix the stator on the circulation module 10, a third magnetic component for magnetically cooperating with the stator can be provided inside the slot structure. The third magnetic component is a magnet, and the stator is fixed by magnetic attraction to improve the stability of the stator installed on the circulation module 10.

[0069] In this embodiment, the cover plate 20 is arranged on the top side of the circulation module 10. The present application adopts the cover plate 20 to press against the top of the stator, and the third magnetic suction component adsorbs the bottom of the stator. The structural cooperation of the circulation module 10 and the cover plate 20 further realizes the height direction clamping and positioning of the stator. The present application adopts the groove structure and the protrusion structure to realize the plane limiting stator. The third magnetic suction component and the cover plate 20 are used to limit the stator along the height direction of the circulation module 10, thereby realizing the three-dimensional space positioning of the stator, further ensuring the stability of the installation of the stator and the flexible circuit board coil, and avoiding the phenomenon of displacement during the bending action that affects the bending accuracy.

[0070] It can be understood that the plane limiting stator refers to the plane formed by the length and width of the flow module 10. Figure 1 The X direction is the length direction of the circulation module 10 , the Y direction is the width direction of the circulation module 10 , and the Z direction is the height direction of the circulation module 10 .

[0071] In this embodiment, the bending jig uses the positioning protrusion 322 on the bending module 30 to press against the part to be bent 80, so that the part to be bent 80 is bent at a preset angle to achieve pre-bending, and then the pre-bent part 80 can be bent by the bending structure. The entire bending action of the present application is completed by the jig, and there is no need to replace the jig or manual participation, thereby avoiding the waste of labor costs and the problem of affecting the bending accuracy. The setting of the jig of the present application is conducive to improving the bending efficiency and ensuring the bending accuracy, thereby improving the yield rate.

[0072] It should be noted that in this embodiment, along the width direction of the circulation module 10, the bending structure and the positioning protrusion 322 can be set on one side or on both sides, and the specific structural setting can be adaptively set according to the setting position of the part to be bent 80 on the flexible circuit board coil in the actual product.

[0073] like Figures 1 to 6 as well as Figures 15 to 18 As shown, along the width direction of the circulation module 10, positioning protrusions 322 and bending structures are provided on both sides of the positioning portion 110. The positioning protrusions 322 and the bending structure can respectively realize pre-bending and bending operations on the structures to be bent on both sides.

[0074] In this embodiment, the positioning portion 110 is arranged in one-to-one correspondence with the bending assembly 320, and a plurality of bending assemblies 320 are provided, and the plurality of bending assemblies 320 are arranged at intervals along the length direction of the circulation module 10. By providing a plurality of bending assemblies 320, the bending fixture of the present application can bend a plurality of flexible circuit board coils at the same time, thereby facilitating improving production efficiency.

[0075] Specifically, the plurality of bending components 320 may be 3, 4, 5, 6, 7, 8, etc., which are arranged at intervals along the length direction of the circulation module 10 .

[0076] In this embodiment, the plurality of bending assemblies 320 are preferably arranged at equal intervals.

[0077] like Figures 1 to 7 As shown, the cover plate 20 is detachably connected to the circulation module 10 . After the stator and the flexible circuit board coil are mounted on the positioning portion 110 , the cover plate 20 is covered on the circulation module 10 .

[0078] During the manufacturing process, each assembly step must be inspected under a microscope. After the third magnetic part attracts the stator, the cover plate 20 can be set to allow the product appearance to be flipped over at will. During the operation, the product will not fall out.

[0079] In one of the specific implementations of this embodiment, the cover plate 20 is connected to the circulation module 10 in such a way that the two ends of the cover plate 20 are snap-fitted with the circulation module 10 along the length direction of the circulation module 10. The snap-fitting structure is easy to operate and is conducive to improving assembly efficiency.

[0080] Specifically, a rotatable buckle 250 is provided on the cover plate 20, and a slot 120 is provided on the circulation module 10. The buckle 250 is rotated to engage or separate from the slot 120, so as to achieve a detachable connection between the cover plate 20 and the circulation module 10.

[0081] In another specific implementation of the present embodiment, the cover plate 20 is fixedly connected to the circulation module 10 via fasteners, and the structural arrangement of the fasteners is conducive to improving the connection strength between the cover plate 20 and the circulation module 10 .

[0082] The fasteners may be screws or the like, and the cover plate 20 and the circulation module 10 are detachably connected by disassembling and installing the fasteners.

[0083] In this embodiment, the cover plate 20 includes a plate body 210, a floating block 220, a third elastic member 230 and a support pin 240. The plate body 210 is connected to the flow module 10. The plate body 210 has a limiting groove opening toward the side of the positioning portion 110. The floating block 220 is at least partially slidably arranged inside the limiting groove, and at least another part can extend out of the limiting groove to abut against the stator. The end of the floating block 220 facing away from the flow module 10 has a slide groove. The third elastic member 230 is arranged between the limiting groove and the floating block 220. The third elastic member 230 provides a driving force for the floating block 220 to extend out of the limiting groove. The support pin 240 is arranged on the plate body 210, and a part of the support pin 240 extends into the interior of the slide groove and slidably cooperates with the slide groove.

[0084] Among them, the plate body 210 serves as the main part of the cover plate 20 and is detachably connected to the circulation module 10. The floating block 220, the third elastic member 230 and the support pin 240 cooperate to form a floating pressure maintaining structure arranged on the plate body 210. The floating block 220 moves along the axial direction of the support pin 240 under the limiting action of the support pin 240, that is, it moves along the height direction of the circulation module 10.

[0085] Specifically, the third elastic member 230 is a spring, and the floating block 220 can be supported by the elastic force of the third elastic member 230, so that the floating block 220 can return to the equilibrium position. When the cover plate 20 is pressed down, the floating block 220 can be used to press, thereby avoiding damage to the stator and the flexible circuit board coil due to the hard interference of the cover plate 20.

[0086] In this embodiment, a plurality of third elastic members 230 are provided, and the plurality of third elastic members 230 are symmetrically arranged on both sides of the support pin 240. The symmetrically arranged third elastic members 230 can ensure that the floating block 220 is subjected to uniform elastic force, which is conducive to ensuring that the floating block 220 maintains stable movement.

[0087] like Figures 8 to 14 As shown, in order to improve the installation stability and installation efficiency of the cover plate 20 and the circulation module 10, the top surface of the circulation module 10 has one of the limiting column 130 and the limiting hole 260, and the cover plate 20 has the other of the limiting column 130 and the limiting hole 260, and the limiting column 130 and the limiting hole 260 cooperate with each other.

[0088] Specifically, the setting of the limiting column 130 and the limiting hole 260 is adopted to further achieve the stability of the connection between the cover plate 20 and the circulation module 10, and the structural setting of the limiting column 130 and the limiting hole 260 also has a guiding function, which facilitates the alignment installation of the cover plate 20 and the circulation module 10 and avoids misalignment, which is beneficial to improving the assembly efficiency of the cover plate 20 and the circulation module 10.

[0089] The limiting hole 260 may be a through hole or a blind hole.

[0090] In this embodiment, the top surface of the circulation module 10 and the bottom surface of the cover plate 20 are magnetically connected via a fourth magnetic member 60. The fourth magnetic member 60 is a magnet, and the fourth magnetic member 60 is respectively arranged on the top surface of the circulation module 10 and the bottom surface of the cover plate 20, and the two fourth magnetic members 60 are magnetically matched. When the cover plate 20 is placed on the top surface of the circulation module 10, the magnetic attraction of the fourth magnetic member 60 is conducive to forming a trend of the cover plate 20 moving toward the circulation module 10, which is conducive to facilitating the connection between the cover plate 20 and the circulation module 10, which not only improves the assembly efficiency between the cover plate 20 and the circulation module 10, but also improves the stability of the connection between the cover plate 20 and the circulation module 10.

[0091] like Figures 1 to 6 As shown, the circulation module 10 has a hollow portion 140, the portion to be bent 80 of the flexible circuit board coil is located at the hollow portion 140, the positioning protrusion 322 and the bending structure pass through the hollow portion 140 and abut against the portion to be bent 80, the hollow portion 140 is arranged in alignment with the positioning portion 110, and along the width direction of the circulation module 10, the hollow portion 140 is arranged on one side or both sides of the positioning portion 110.

[0092] Among them, when the circulation module 10 is installed on the bending module 30, the positioning protrusion 322 and the bending structure pass through the hollow part 140, and the part to be bent 80 abuts against the positioning protrusion 322, and the pre-bending of the part to be bent 80 is completed during the installation of the circulation module 10; and the bending structure extends out through the hollow part 140 to facilitate the operation of the bending structure.

[0093] In this embodiment, when the bending structure performs a bending operation on the pre-bent portion 80 to be bent, the bending structure will move toward one side of the cover plate 20. To avoid interference, the cover plate 20 has an avoidance groove 211 for avoiding the bending structure.

[0094] like Figures 15 to 18 As shown, the bending assembly 320 also includes a mounting plate 321 , which is disposed on the base 310 , the flow module 10 is disposed on the mounting plate 321 , the positioning protrusion 322 is fixedly disposed on the mounting plate 321 , and the bending structure is rotatably disposed on the positioning protrusion 322 .

[0095] The mounting plate 321 and the base 310 may be an integrally formed structure, or a magnetically coupled structure, or may be connected using fasteners such as screws.

[0096] In this embodiment, the mounting plate 321 is used to support and fix the circulation module 10 . When the circulation module 10 is disposed on the bending module 30 , the mounting plate 321 is in contact with the circulation module 10 .

[0097] Specifically, a first magnetic component is provided on the top surface of the mounting plate 321, and a second magnetic component is provided on the bottom surface of the flow module 10. The first magnetic component and the second magnetic component cooperate with each other magnetically, and the flow module 10 is fixed on the mounting plate 321 by magnetic attraction to realize the assembly of the flow module 10 and the bending module 30.

[0098] Wherein, the first magnetic attraction component and the second magnetic attraction component are magnets.

[0099] In order to further improve the assembly efficiency of the circulation module 10 and the bending module 30, the base 310 is provided with one of the positioning boss 328 and the positioning groove 150, and the bottom surface of the circulation module 10 is provided with the other of the positioning boss 328 and the positioning groove 150. The positioning boss 328 and the positioning groove 150 are plugged together. The structure in which the positioning boss 328 and the positioning groove 150 cooperate can not only improve the installation accuracy and avoid the occurrence of misalignment, but also enhance the stability of the connection between the base 310 and the circulation module 10, thereby ensuring the installation strength between the bending module 30 and the circulation module 10.

[0100] In one implementation of this embodiment, the positioning boss 328 is disposed on the mounting plate 321, a portion of the positioning protrusion 322 is formed as a first magnetic component, the second magnetic component is disposed inside the positioning groove 150, and the positioning protrusion 322 extends into the interior of the positioning groove 150 and realizes magnetic cooperation between the first magnetic component and the second magnetic component.

[0101] In this embodiment, the base 310 is provided with a plurality of limiting bosses 311, which abut against the outer peripheral surface of the circulation module 10. The structure of multiple limiting bosses 311 arranged on the periphery of the circulation module 10 is conducive to facilitating the positioning and installation of the circulation module 10, and can also be used to limit the circulation module 10 to avoid the circulation module 10 from shaking or deviating on the base 310, which affects the efficiency and accuracy of the bending action.

[0102] In this embodiment, the base 310 has a cylinder 329, and the bottom of the circulation module 10 has a circular groove 160. The cylinder 329 and the circular groove 160 are plugged together to further improve the stability of the installation. Furthermore, the top surface of the base 310 has a fifth magnetic member 90, and the bottom of the circulation module 10 has a sixth magnetic member 70. The fifth magnetic member 90 and the sixth magnetic member 70 are magnetically matched. The base 310 and the circulation module 10 are magnetically connected by the fifth magnetic member 90 and the sixth magnetic member 70 to further improve the stability of the connection.

[0103] In this embodiment, the bending assembly 320 further includes a connecting plate 323 disposed on the top surface of the mounting plate 321, extending along the width direction of the circulation module 10, and the positioning protrusion 322 is formed at least at one end of the connecting plate 323. The connecting plate 323 and the positioning protrusion 322 are an integrally formed structure, and the positioning protrusion 322 is located at the end position of the connecting plate 323.

[0104] like Figure 17 to Figure 18 As shown, the bending structure includes a rotating block 324, a rotating member 327 and a pressing structure. The rotating block 324 is rotatably connected to the positioning protrusion 322 through the rotating member 327. The pressing structure is arranged on the side of the rotating block 324 facing the positioning portion 110. The pressing structure is used to press the to-be-bent portion 80 of the pre-bent flexible circuit board coil.

[0105] The rotating member 327 is an axis structure, and the rotating block 324 can stably perform circular rotation through the setting of the rotating member 327. The rotating block 324 drives the pressing structure to rotate synchronously through the rotation.

[0106] Specifically, the pressing structure includes a first pressing portion 325 and a second pressing portion 326. The first pressing portion 325 is movably arranged on the rotating block 324, and the first pressing portion 325 is used to abut against the large surface of the part to be bent 80. The second pressing portion 326 is movably arranged on the rotating block 324, and the second pressing portion 326 is arranged on the side of the first pressing portion 325 away from the base 310. The second pressing portion 326 has an abutting surface for abutting against one end of the part to be bent 80 away from the bending area.

[0107] It can be understood that the part to be bent 80 is a sheet-like structure having two large surfaces arranged opposite to each other, one of which is used to fit with the bottom surface of the stator slot, and the first pressing portion 325 is used to abut against the other large surface of the part to be bent 80 to drive the part to be bent 80 to bend.

[0108] The first pressing portion 325 is formed as a side pressing, and the second pressing portion 326 is formed as a vertical pressing. The first pressing portion 325 and the second pressing portion 326 cooperate to realize double-sided pressing, so that when bending, the second pressing portion 326 can vertically limit the part to be bent 80, so that the part to be bent 80 can only be bent under the drive of the first pressing portion 325. The double-sided pressing structure prevents the part to be bent 80 from having too much freedom due to unilateral pressing of the part to be bent 80, such as unilateral pressing or vertical pressing, and causing deformation in other directions.

[0109] In this embodiment, during the rotation of the bending structure, the second pressing portion 326 first abuts against the part to be bent 80 to achieve pre-pressure limiting of the part to be bent 80. During the continued rotation of the bending structure, the first pressing portion 325 contacts the large surface of the part to be bent 80, and then drives the part to be bent 80 to bend, thereby achieving double-sided pressure on the part to be bent 80. During the entire rotation process, the second pressing portion 326 always applies pressure to the part to be bent 80.

[0110] In this embodiment, a first mounting groove is provided on the rotating block 324, and the first pressing portion 325 includes a first elastic member and a first pressure block. The first elastic member is arranged inside the first mounting groove, and the first pressure block is slidably arranged inside the first mounting groove. The first elastic member is arranged between the first pressure block and the rotating block 324, and the first elastic member provides driving force for the first pressure block to extend out of the first mounting groove and abut against the part 80 to be bent.

[0111] Among them, the first pressure block is used to contact and press the part to be bent 80, and the first elastic member is a spring. After the first pressure block contacts the part to be bent 80, the first elastic member is compressed, and the first elastic member provides the first pressure block with a movement trend to press the part to be bent 80. The setting of the first elastic member can achieve the driving force of the first pressure block to press the part to be bent 80 after the part to be bent 80 is bent to the inside of the stator slot, thereby achieving the effect of maintaining pressure.

[0112] In this embodiment, the second pressing portion 326 includes a second elastic member and a second pressure block. The second pressure block is rotatably arranged on the rotating block 324. The second pressure block is arranged on the part of the rotating block 324 facing the positioning portion 110 to form an abutment surface facing the part to be bent 80. The second elastic member is arranged between the second pressure block and the rotating block 324. The second elastic member provides driving force for the second pressure block to squeeze the part to be bent 80.

[0113] Among them, the second pressure block is rotatably set on the rotating block 324, and the second pressure block is connected to the rotating block 324 through a second elastic member. The second elastic member is a spring. The second elastic member provides a driving force for the second pressure block to be in a rotational position pressed against the part to be bent 80. When the second pressure block is driven to rotate to separate the abutting surface from the part to be bent 80, the second elastic member is used to provide a restoring force for reverse movement.

[0114] It can be understood that the structural setting of the second elastic member can enable the second pressing block to have a buffer stroke under the action of vertical abutment. After bending and baking and shaping are completed, the second pressing block is slightly displaced by the pressure of the part to be bent 80. Such a setting can avoid the phenomenon of hard connection causing breakage of the part to be bent 80 during the baking and heating process.

[0115] like Figures 1 to 8 as well as Fig.18 As shown, the bending jig also includes a first magnetic member 40 and a second magnetic member 50. The first magnetic member 40 is arranged on the flow module 10 and is located on at least one side of the positioning portion 110 along the width direction of the flow module 10. The second magnetic member 50 is arranged on the side of the rotating block 324 facing the positioning portion 110. The first magnetic member 40 and the second magnetic member 50 are arranged opposite to each other, and the first magnetic member 40 and the second magnetic member 50 are attracted to each other. The first magnetic member 40 provides suction for the rotating block 324 to keep pressing against the part to be bent 80.

[0116] Specifically, the structural setting in which the first magnetic part 40 and the second magnetic part 50 are attracted to each other is advantageous for the rotation of the bending structure. When it is necessary to rotate the bending structure, a small force can be applied to drive the bending part 80 to be bent toward one side of the stator slot, and the magnetic force between the first magnetic part 40 and the second magnetic part 50 provides the first pressing part 325 with a force to abut against the structure to be bent.

[0117] Wherein, the first magnetic component 40 and the second magnetic component 50 are both magnets.

[0118] like Figures 1 to 6As shown, the bending jig further includes a third magnetic member and a fourth magnetic member. The third magnetic member is arranged on the top surface of the mounting plate 321, and the fourth magnetic member is arranged on the bottom surface of the rotating block 324. The third magnetic member and the fourth magnetic member attract each other.

[0119] Among them, the bending fixture and the mounting plate 321 are connected and fixed by a magnetic attraction structure, which is conducive to facilitating the assembly operation and improving the assembly efficiency.

[0120] In this embodiment, the suction force between the third magnetic member and the fourth magnetic member is smaller than the suction force between the first magnetic member 40 and the second magnetic member 50. Specifically, the first magnetic member 40, the second magnetic member 50, the third magnetic member and the fourth magnetic member are made of the same material, and the first magnetic member 40 and the second magnetic member 50 are larger in size than the third magnetic member and the fourth magnetic member.

[0121] Embodiment 2

[0122] This embodiment provides a bending method. The bending method is a bending jig in the first embodiment. The bending method includes:

[0123] Positioning the stator and the flexible circuit board coil, and placing the positioning stator and the flexible circuit board coil on the positioning portion 110 of the circulation module 10;

[0124] Install the cover plate 20, which is connected to the circulation module 10 to form an integral installation, and the cover plate 20 abuts against the top of the stator;

[0125] Pre-bending: the installation unit is set on the bending module 30, and the positioning protrusion 322 of the bending module 30 abuts against the to-be-bent portion 80 of the flexible circuit board coil to achieve a preset bending angle of the to-be-bent portion 80;

[0126] Bending: the bending structure of the bending module 30 rotates to drive the pre-bent portion 80 to be bent to the inside of the stator slot of the stator;

[0127] After holding for a preset time, the bending structure is separated from the flexible circuit board coil by rotating.

[0128] Specifically, after the stator and the flexible circuit board coil are installed on the positioning part 110, the part to be bent of the flexible circuit board extends to the hollow part 140 of the circulation module 10, and then the cover plate 20 is set on the circulation module 10, and the stator is positioned by pressing the top of the stator with the cover plate 20. The cover plate 20 is connected to the circulation module 10 to form an installed whole, and then the installed circulation module 10 is set on the bending module 30. During the installation process, the positioning protrusion 322 presses against the part to be bent 80 to achieve a preset bending angle of the part to be bent 80. After the installation is completed, the bending structure is rotated to drive the part to be bent 80 to continue to bend to the inside of the stator slot, and the pressure is maintained for a preset time. The bending structure is separated from the flexible circuit board coil by rotating to facilitate the separation of the overall component from the bending module 30, and the next overall component is installed on the bending module 30.

[0129] The cover plate 20 is fixedly connected to the circulation module 10; the circulation module 10 and the bending structure are provided with a first magnetic member 40 and a second magnetic member 50 to realize auxiliary rotation, and can realize pressure-maintaining operation without manual or tool-provided external force.

[0130] In this embodiment, the bending method further includes:

[0131] Gluing, pre-bending the inner glue coating of the forward stator slot;

[0132] Bonding: after bending, the part to be bent 80 is bonded and fixed with the colloid;

[0133] Thermal fixing: after bending, the bent portion 80 is fixed inside the stator slot by baking.

[0134] Among them, after the stator and the flexible circuit board coil are installed in the circulation module 10, the glue coating operation is performed inside the stator slot, and then the cover plate 20 is installed. After the bending step is completed, the part to be bent 80 is bonded to the bottom surface of the stator slot through the glue, and is kept in close contact under the pressure-maintaining action of the second pressing part 326 of the first pressing part 325. The glue is quickly solidified by baking to achieve fixed bonding between the part to be bent 80 and the stator.

[0135] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0136] The bending jig of the present application adopts a circulation module 10 for positioning and supporting the stator and the flexible circuit board coil, which can realize front operation of the flexible circuit board coil, and is easy to operate; and the present application adopts a cover plate 20 to press against the top of the stator, and the structural cooperation of the circulation module 10 and the cover plate 20 further realizes the height direction clamping and positioning of the stator, further ensuring the stability of the installation of the stator and the flexible circuit board coil, and avoiding the phenomenon of offset during the bending action that affects the bending accuracy.

[0137] The bending jig used in the present application uses the positioning protrusion 322 on the bending module 30 to press against the part to be bent 80, so that the part to be bent 80 is bent at a preset angle to achieve pre-bending, and then the pre-bent part 80 can be bent by the bending structure. The entire bending action of the present application is completed by the jig, and there is no need to replace the jig or human participation, thereby avoiding the waste of labor costs and the problem of affecting the bending accuracy. The setting of the jig of the present application is conducive to improving the bending efficiency and ensuring the bending accuracy, thereby improving the yield rate.

[0138] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0139] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, modules and / or combinations thereof.

[0140] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0141] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bending jig, characterized in that: include: A circulation module (10) has a positioning portion (110) on the top surface, wherein the positioning portion (110) is used to position the stator and a flexible circuit board coil arranged on the outer peripheral side of the stator; A cover plate (20) is arranged on the circulation module (10), and a portion of the cover plate (20) presses against a top surface of the stator; The bending module (30) comprises a base (310) and a bending assembly (320) arranged on the base (310); the circulation module (10) is arranged on the base (310); along the width direction of the circulation module (10), the bending assembly (320) comprises a positioning protrusion (322) and a bending structure arranged on at least one side of the positioning portion (110); the positioning protrusion (322) is used to abut against the to-be-bent portion (80) of the flexible circuit board coil to achieve pre-bending; the bending structure is rotatably arranged on the positioning protrusion The bending structure is configured to rotate and drive the portion to be bent (80) to be bent inside the stator slot of the stator, the bending structure comprising a rotating member (327), a rotating block (324) and a pressing structure, the rotating block (324) being rotatably connected to the positioning protrusion (322) via the rotating member (327), the pressing structure being arranged on a side of the rotating block (324) facing the positioning portion (110), the pressing structure being used to press the portion to be bent (80) after pre-bending, the pressing structure comprising: A first pressing portion (325) movably arranged on the rotating block (324), the first pressing portion (325) being used to abut against a large surface of the portion to be bent (80); A second pressing portion (326) is movably arranged on the rotating block (324), the second pressing portion (326) being arranged on a side of the first pressing portion (325) away from the base (310), the second pressing portion (326) having a contact surface for contacting an end of the portion to be bent (80) away from the bending area.

2. The bending jig according to claim 1, characterized in that: The positioning protrusion (322) and the bending structure are provided on both sides of the positioning portion (110); and / or The positioning portion (110) is arranged in a one-to-one correspondence with the bending assembly (320), a plurality of the bending assemblies (320) are provided, and the plurality of the bending assemblies (320) are arranged at intervals along the length direction of the circulation module (10).

3. The bending jig according to claim 1, characterized in that: The bending assembly (320) further comprises a mounting plate (321), wherein the mounting plate (321) is arranged on the base (310), the circulation module (10) is arranged on the mounting plate (321), and the positioning protrusion (322) is fixedly arranged on the mounting plate (321).

4. The bending jig according to claim 3, characterized in that: The bending assembly (320) further comprises a connecting plate (323) arranged on the top surface of the mounting plate (321) and extending along the width direction of the circulation module (10), and the positioning protrusion (322) is formed at least at one end of the connecting plate (323).

5. The bending jig according to claim 3, characterized in that: The top surface of the mounting plate (321) is provided with a first magnetic attraction component, the bottom surface of the circulation module (10) is provided with a second magnetic attraction component, and the first magnetic attraction component and the second magnetic attraction component are magnetically matched; and / or The base (310) has one of a positioning boss (328) and a positioning groove (150), the bottom surface of the circulation module (10) has the other of the positioning boss (328) and the positioning groove (150), and the positioning boss (328) and the positioning groove (150) are plug-fitted; and / or The base (310) is provided with a plurality of position-limiting bosses (311), and the position-limiting bosses (311) abut against the outer peripheral surface of the circulation module (10).

6. The bending jig according to claim 1, characterized in that: The rotating block (324) has a first mounting groove, and the first pressing portion (325) comprises: A first elastic member, arranged inside the first mounting groove; A first pressing block is slidably arranged inside the first installation groove, and the first elastic member is arranged between the first pressing block and the rotating block (324). The first elastic member provides a driving force for the first pressing block to extend out of the first installation groove and abut against the portion to be bent (80).

7. The bending jig according to claim 1, characterized in that: The second pressing portion (326) comprises: a second pressing block, rotatably arranged on the rotating block (324), the second pressing block being arranged on a portion of the rotating block (324) facing the positioning portion (110) and forming the abutment surface facing the portion to be bent (80); A second elastic member is arranged between the second pressing block and the rotating block (324), and the second elastic member provides a driving force for the second pressing block to press the portion to be bent (80).

8. The bending jig according to claim 1, characterized in that: The bending jig further comprises: A first magnetic member (40) is arranged on the circulation module (10) and is located on at least one side of the positioning portion (110) along the width direction of the circulation module (10); The second magnetic member (50) is arranged on the side of the rotating block (324) facing the positioning portion (110), and the first magnetic member (40) and the second magnetic member (50) are arranged opposite to each other. The first magnetic member (40) and the second magnetic member (50) attract each other, and the first magnetic member (40) provides suction force for the rotating block (324) to keep pressing against the portion to be bent (80).

9. The bending jig according to claim 8, characterized in that: The bending jig further comprises: a third magnetic component, arranged on the top surface of the mounting plate (321) of the bending assembly (320); The fourth magnetic member is arranged on the bottom surface of the rotating block (324), the third magnetic member and the fourth magnetic member are attracted to each other, and the attraction between the third magnetic member and the fourth magnetic member is smaller than the attraction between the first magnetic member (40) and the second magnetic member (50).

10. The bending jig according to claim 1, characterized in that: The cover plate (20) is arranged on one side of the top of the circulation module (10), and the positioning portion (110) comprises a groove structure opening toward one side of the cover plate (20) and a protrusion structure arranged on the bottom surface of the groove structure, the inner circumferential surface of the groove structure abuts against the outer circumferential surface of the stator, and the protrusion structure abuts against the inner circumferential surface of the stator.

11. The bending jig according to claim 10, characterized in that: A third magnetic attraction component for magnetically engaging with the stator is arranged inside the slot structure.

12. The bending jig according to claim 1, characterized in that: The circulation module (10) has a hollow portion (140), the portion to be bent (80) of the flexible circuit board coil is located at the hollow portion (140), and the positioning protrusion (322) and the bending structure penetrate the hollow portion (140) and abut against the portion to be bent (80); and / or The cover plate (20) is provided with an avoidance groove (211) for avoiding the bending structure.

13. The bending jig according to claim 1, characterized in that: The cover plate (20) comprises: A plate body (210) connected to the circulation module (10), the plate body (210) having a limiting groove opening toward one side of the positioning portion (110); A floating block (220), at least part of which is slidably disposed inside the limiting groove, and at least another part of which can extend out of the limiting groove to abut against the stator, and one end of the floating block (220) facing away from the circulation module (10) has a sliding groove; a third elastic member (230), arranged between the limiting groove and the floating block (220), the third elastic member (230) providing a driving force for the floating block (220) to extend out of the limiting groove; A support pin (240) is arranged on the plate body (210), and a portion of the support pin (240) extends into the interior of the slide groove and slidably cooperates with the slide groove.

14. The bending jig according to claim 13, characterized in that: A plurality of the third elastic members (230) are provided, and the plurality of the third elastic members (230) are symmetrically arranged on both sides of the support pin (240).

15. The bending jig according to claim 1, characterized in that: Along the length direction of the circulation module (10), two ends of the cover plate (20) are snap-fitted with the circulation module (10); and / or The cover plate (20) and the circulation module (10) are fixedly connected via fasteners.

16. The bending jig according to claim 1, characterized in that: The top surface of the circulation module (10) is provided with one of the limiting column (130) and the limiting hole (260), the cover plate (20) is provided with the other of the limiting column (130) and the limiting hole (260), and the limiting column (130) and the limiting hole (260) are matched in limiting manner; and / or The top surface of the circulation module (10) and the bottom surface of the cover plate (20) are magnetically connected via a fourth magnetic attraction member (60).

17. A bending method, characterized in that: The bending jig according to any one of claims 1 to 16, wherein the bending method comprises: Positioning the stator and the flexible circuit board coil, and arranging the positioning stator and the flexible circuit board coil on the positioning portion (110) of the circulation module (10); Installing a cover plate (20), wherein the cover plate (20) is connected to the circulation module (10) to form an integral installation, and the cover plate (20) abuts against the top of the stator; Pre-bending, the installation unit is set on the bending module (30), and the positioning protrusion (322) of the bending module (30) is used to press against the portion to be bent (80) of the flexible circuit board coil, so as to achieve bending of the portion to be bent (80) at a preset angle; Bending, the bending structure of the bending module (30) rotates to drive the pre-bent portion (80) to be bent to the inside of the stator slot of the stator; After holding for a preset time, the bending structure is separated from the flexible circuit board coil by rotating.

18. The bending method according to claim 17, characterized in that: The bending method further comprises: Gluing, the inner glue coating body of the pre-bent forward stator slot; Bonding, after the bending, the portion to be bent (80) is bonded and fixed to the colloid; Thermal fixing, after the bending, the portion to be bent (80) is fixed inside the stator slot by baking.

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