Terminal pitch adjustable skeleton assembly and a coil

Abstract

The present application relates to the technical field of electromagnetic coil, and particularly relates to a skeleton assembly with adjustable terminal spacing and a coil. The skeleton assembly comprises a skeleton and two terminals. The skeleton has two mounting positions which are spaced apart along a first direction, and the center line spacing is L. Each terminal has a pin portion and a male plug portion. The center line of the male plug portion is offset from the center line of the pin portion by delta. The two terminals are oppositely offset. When the two terminals are inserted in a first configuration, the center line spacing of the male plug portions is L+2delta. When the two terminals are inserted in a second configuration, the center line spacing is L-2delta. A connecting portion is formed between the pin portion and the male plug portion. The connecting portion is aligned on one side of the male plug portion and offset on the other side. In the two configurations, the offset is on the inner side or the outer side, respectively, to form visual error prevention. The pin portion is tightly fitted with the insertion slot and has a notch or a hole and a lead pin. L=13.8mm and delta=0.6mm, corresponding to two terminal center spacing standards of 15mm and 12.6mm.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic coil technology, specifically to a frame assembly with adjustable terminal spacing and a coil. Background Technology

[0002] In household appliances, the solenoid coils of fluid control valves and pumps, such as inlet and drain solenoid valves, typically have two metal terminals leading out to connect to sockets on the appliance's control panel. Different appliance manufacturers and models have different requirements for the center distance between these two terminals. Currently, there are two main standard center distances in the industry: one is 15mm, primarily used in top-loading washing machines, water purifiers, and coffee makers; the other is 12.6mm, primarily used in front-loading washing machines, dishwashers, and washing machines exported to Europe and the Americas. The two center distances differ by 2.4mm. Since the socket positions on the control panel are designed with fixed spacing, a deviation of more than 0.3mm in the terminal center distance can lead to problems such as difficulty in insertion, poor contact, or terminal deformation. Therefore, the two coil specifications are not interchangeable.

[0003] In the field of electromagnetic coil manufacturing, the coil frame is usually integrally molded by injection molding. The installation positions of the two terminals are fixed during the injection molding of the frame, and one frame can only correspond to one terminal center distance. When the OEM requires compatibility with both 15mm and 12.6mm terminal center distance standards, the coil manufacturer must develop two sets of frame injection molds and two sets of terminal stamping molds, and arrange winding, soldering, molding, and inspection processes separately. This results in large mold investments and long changeover cycles. Chinese patent document CN214946726U discloses a waterproof coil for solenoid valves. Waterproofing is achieved by injection molding a plastic shell around the coil frame, metal inserts, and enameled wire, and then filling it with insulating varnish. In this solution, the positions of the two metal inserts on the frame are fixed by the injection mold, corresponding to one terminal center distance specification. When a different terminal center distance is required, a new mold must be made. Chinese Patent Publication No. CN202142367U discloses an electromagnetic coil for a solenoid valve used in household appliances. It suppresses induced surge voltage during power failure by inserting connecting terminals and winding terminals onto the frame and setting a full-wave rectifier circuit. In this design, the position of the connecting terminals on the frame is also determined integrally by the injection mold, and one frame can only correspond to one terminal center distance. Chinese Patent Publication No. CN119934295A discloses an assembly process for a coil bracket, terminals, and an electromagnetic water valve. It improves the screw-driven assembly process by providing an insertion part on the inner side of the vertical portion of the terminal and reserving a clearance notch on the outer side. However, the center distance between the two terminals is still integrally determined by the coil bracket, and two different terminal center distances cannot be output on the same bracket.

[0004] Chinese Patent Publication No. CN201149123Y discloses an electromagnetic coil for an electromagnetic water inlet valve used in household appliances. The coil has a groove on the end face of the frame, and the connecting terminal is embedded in the groove and fixed by a toothed barb. Although this solves the problem of fixing the terminal on the frame, the position of the terminal in the groove is fixed, and one frame can only correspond to one terminal center distance.

[0005] Another solution in the industry involves bending the middle section of the terminal to offset the male connector from the pin, which can adjust the final position of the male connector to some extent by changing the bending direction. However, this solution has three prominent problems: First, the cross-section changes drastically at the bend, making it prone to stress concentration due to lateral forces during winding, soldering, molding, and assembly, which can lead to plastic deformation and breakage after long-term use. Second, it is difficult to position the terminal in the molding cavity after bending, and the molding compound is prone to air trapping, insufficient glue, or the terminal being bent at the bend. Third, the thermal expansion coefficients of the bend section and the molding compound are very different, and micro-gaps can easily form between the bend section and the molding compound after temperature cycling, affecting waterproof performance.

[0006] In summary, existing methods for configuring the frame and terminals of electromagnetic coils either fix the terminal installation position during frame injection molding, requiring each frame to correspond to only one terminal center distance and necessitating separate molds for different specifications, or use a terminal mid-section bending method to adjust the spacing, which leads to bending stress concentration, encapsulation difficulties, and waterproofing risks. No technical solution has yet been found that allows the same set of frame injection molds and the same set of terminal stamping molds to simultaneously output two different terminal center distances using a purely geometric layout without introducing any moving or adjusting parts or bending the terminals. Summary of the Invention

[0007] To address the aforementioned issues, a frame assembly with adjustable terminal spacing and a coil are provided. By forming an offset structure between the pin portion and the male portion of the terminal and inserting the two terminals into the same frame in a mirror direction, the technical problem that one frame can only correspond to one terminal center distance and requires separate molds for two specifications is solved. This achieves the effect of the same frame mold and terminal mold being compatible with two terminal center distance standards.

[0008] To address the problems of existing technologies, the present invention provides a frame assembly with adjustable terminal spacing, comprising: a frame for winding a coil, the frame having two mounting positions spaced apart along a first direction, the center lines of the two mounting positions being spaced apart by L in the first direction; two terminals, each having a pin portion and a male portion, the pin portion engaging with the mounting positions to connect the terminal to the frame; of the two terminals, the center line of the male portion of one terminal has an offset value δ in the negative direction of the first direction relative to the center line of the pin portion, and the center line of the male portion of the other terminal has an offset value δ in the positive direction of the first direction relative to the center line of the pin portion; the two terminals are configured to be inserted into the frame in two ways: in a first configuration, the center lines of the male portions of the two terminals are spaced apart by L+2δ in the first direction; in a second configuration, the center lines of the male portions of the two terminals are spaced apart by L-2δ in the first direction; the two terminals are interchanged in the first and second configurations so that the same frame assembly corresponds to two different terminal center spacing standards.

[0009] In some examples of the present invention, a connecting portion is formed between the pin portion and the male portion; the connecting portion and the male portion are aligned on one side in the first direction, and the connecting portion and the male portion are misaligned on the other side in the first direction.

[0010] In some examples of the invention, the misalignment directions of the two terminals are opposite, such that in the first configuration the two misalignments are located on the inner sides of the two terminals opposite to each other, and in the second configuration the two misalignments are located on the outer sides of the two terminals opposite to each other.

[0011] In some examples of the invention, the two mounting positions are mirrored with respect to the central plane of the skeleton in the first direction.

[0012] In some examples of the present invention, the mounting position is an insertion slot formed on the frame, and the two sides of the plug portion are formed with limiting steps that abut against the end face of the insertion slot.

[0013] In some examples of the present invention, the pin portion is configured to be narrower at the front and wider at the rear from its front end to its rear end.

[0014] In some examples of the present invention, the tail of the pin portion is tightly fitted with the insertion groove in the first direction, and the pin portion has a gap with the insertion groove in a direction perpendicular to the first direction.

[0015] In some examples of the present invention, the portion of the pin that is inserted into the insertion slot forms a notch or hole.

[0016] In some examples of the invention, the pin portion is provided with a pin that extends from the edge of the notch or hole and is bent to form a lead.

[0017] In some examples of this invention, L = 13.8 mm and δ = 0.6 mm.

[0018] A coil includes a frame assembly with adjustable terminal spacing, enameled wire wound on the frame, and a plastic encapsulation layer covering the frame, the pin portions of the two terminals, and the enameled wire.

[0019] The advantages of this invention compared to the prior art are as follows: The same set of skeleton injection molds and terminal stamping molds can accommodate two terminal center distance standards. The center distance between the two mounting positions on the skeleton is L, and the offset of the male terminal part relative to the pin part is δ. When the two terminals are inserted in the first configuration, the center distance of the male part is L+2δ, and when inserted in the second configuration, it is L-2δ. Changing the terminal center distance specification only requires swapping the insertion direction of the two terminals, without replacing the skeleton or opening a new mold. This saves the mold opening costs of a skeleton injection mold and a terminal stamping mold, reduces production and management costs, and shortens the changeover cycle.

[0020] The misalignment of the connector and the male connector is in opposite directions on the two terminals. In the first configuration, the misalignment is located on the inner side of the two terminals opposite each other, while in the second configuration, the misalignment is located on the outer side of the two terminals opposite each other, creating a visually noticeable difference. During production, workers or machine vision systems can quickly determine whether the terminals are misplaced by observing whether the misalignment is on the inner or outer side. During product use, it can also quickly identify the terminal center distance specification of the current product, thus preventing errors. Attached Figure Description

[0021] Figure 1 This is a perspective view of a coil according to the present invention.

[0022] Figure 2 This is a top view of a coil according to the present invention.

[0023] Figure 3 This is a perspective view of a frame assembly with adjustable terminal spacing according to the present invention.

[0024] Figure 4 This is a top view of a skeleton assembly with adjustable terminal spacing according to the present invention.

[0025] Figure 5 This is a top view of the terminals in a skeleton assembly with adjustable terminal spacing according to the present invention.

[0026] Figure 6This is a partial cross-sectional perspective view of a frame assembly with adjustable terminal spacing according to the present invention. Figure 1 .

[0027] Figure 7 This is a partial cross-sectional perspective view of a frame assembly with adjustable terminal spacing according to the present invention. Figure 2 .

[0028] Figure 8 This is a comparison diagram of a first configuration and a second configuration of two terminals in a skeleton assembly with adjustable terminal spacing according to the present invention.

[0029] Figure 9 These are comparative images of the appearance of the skeleton assembly with two configurations of the adjustable terminal spacing according to the present invention.

[0030] Figure 10 This is a comparison of the appearance of the finished coils of the present invention under two different terminal center distance specifications.

[0031] The numbers in the diagram are: 1. Skeleton; 11. Winding spool; 12. Upper end plate; 13. Lower end plate; 14. Center through hole; 15. Insertion slot; 2. Terminal; 21. Pin part; 22. Connecting part; 23. Male plug part; 24. Lead; 25. Limiting step; 3. Plastic sealing layer. Detailed Implementation

[0032] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0033] refer to Figure 3 This embodiment provides a frame assembly with adjustable terminal spacing, consisting of a frame 1 and two terminals 2. The frame 1 is an insulating injection molded part, and the terminals 2 are metal stamped parts. The two terminals 2 are respectively inserted into corresponding mounting positions on the frame 1.

[0034] The frame 1 generally includes a winding drum 11 located in the middle, an upper end plate 12 located at the upper end of the winding drum 11, a lower end plate 13 located at the lower end of the winding drum 11, and a central through hole 14 extending through the winding drum 11 axially. The winding drum 11 has a cylindrical structure for winding enameled wire on its outer cylindrical surface; the central through hole 14 extends through the winding drum 11 in the vertical direction and accommodates electromagnetic drive components such as the magnetic sleeve, stationary iron core, and moving iron core during coil assembly. The diameter of the upper end plate 12 is larger than the outer diameter of the winding drum 11, and the lower end plate 13 is provided with a structure for positioning in conjunction with an external magnetic yoke.

[0035] refer to Figure 4The upper end plate 12 has two insertion slots 15, which are spaced apart along a first direction. This first direction refers to the direction of the line connecting the two insertion slots 15, corresponding to the left-right direction in the attached diagram. The distance between the center lines of the two insertion slots 15 in the first direction is L. The two insertion slots 15 are mirror images of each other with respect to the center plane M of the skeleton 1 in the first direction. Their outlines, dimensions, and slot wall structures are identical, allowing the same type of terminal 2 to be inserted from either the left or right insertion slot 15, with its geometric position symmetrical about the center plane M after insertion. The upper end plate 12 also has wire-hanging feet near the insertion slots 15 for hooking the beginning and end of the enameled wire during the winding process to facilitate soldering.

[0036] refer to Figure 5 Each terminal 2 is a one-piece stamped metal part, formed by continuous punching and bending of the same metal strip on a progressive die. The terminal 2 has a pin portion 21 and a male insertion portion 23 along its length, with a connecting portion 22 formed between the pin portion 21 and the male insertion portion 23. The pin portion 21 is a plate-like structure used to insert into the insertion slot 15 of the frame 1 to achieve connection between the terminal 2 and the frame 1; the male insertion portion 23 is a flat sheet-like structure used to insert into a socket on the overall control board.

[0037] The connecting portion 22 connects the pin portion 21 and the male portion 23. In a first direction, the connecting portion 22 is aligned with one side of the male portion 23, and misaligned on the other side. In some embodiments, the width of this misalignment can be the offset value δ of the centerline of the male portion 23 relative to the centerline of the pin portion 21 in the first direction. Figure 5 Taking the orientation shown as an example, the center line of the male plug 23 is located to the right of the center line of the plug part 21, with an offset distance of δ. Then, the right side of the connecting part 22 is aligned with the right side of the male plug 23, and the left side of the connecting part 22 protrudes to the left relative to the left side of the male plug 23 by δ, forming a misalignment.

[0038] The width of the connecting portion 22 in the first direction can be greater than the width of the male plug 23 in the first direction. In this case, the connecting portion 22 protrudes laterally from one side of the male plug 23, and the width of the protruding portion is equal to δ. This wider connecting portion increases the encapsulation contact area with the plastic of the skeleton 1 while achieving offset, thus improving the torsional resistance of the terminal 2. The width of the connecting portion 22 in the first direction can also be smaller than the width of the male plug 23 in the first direction. In this case, the male plug 23 protrudes laterally from one side of the connecting portion 22, and the protrusion direction is the offset direction, with the connecting portion 22 and the male plug 23 aligned on the other side. Both width relationships are formed in one step by a progressive die, and both can achieve the effect of offsetting the center line of the male plug 23 relative to the center line of the pin portion 21 by δ.

[0039] The two terminals 2 are misaligned in opposite directions. The center line of the male insertion portion 23 of one terminal 2 is offset by δ in the negative direction of the first direction relative to the center line of the pin portion 21, while the center line of the male insertion portion 23 of the other terminal 2 is offset by δ in the positive direction of the first direction relative to the center line of the pin portion 21. In other words, the two terminals 2 are mirror images: if one terminal 2 is used as a reference and flipped 180°, the other terminal 2 is obtained. In stamping production, the two terminals 2 can be produced by the same progressive die by adjusting the feeding direction or flipping the station, without the need for additional die opening.

[0040] refer to Figure 8 In the first configuration, the two terminals 2 are inserted into the two insertion slots 15 respectively. The male connector 23 of the left terminal 2 is offset to the left relative to the pin 21; the male connector 23 of the right terminal 2 is offset to the right relative to the pin 21. The two male connectors 23 are opposite to each other, and the distance between their center lines in the first direction is L+2δ. At this time, the misalignment of the two terminals 2 is located on the inner side of each other, that is, the misalignment of the left terminal 2 is on its right side, and the misalignment of the right terminal 2 is on its left side, with the two misalignments opposite each other. Since the distance between the two misalignments is less than the distance between the outer edges of the two male connectors 23, it can be observed from the appearance that each of the two terminals 2 has a stepped misalignment on the side closest to each other, forming an "inward V-shape".

[0041] refer to Figure 8 In the second configuration, the two terminals 2 are inserted into the frame 1 after their positions are interchanged. The terminal 2 originally inserted into the left insertion slot 15 is now inserted into the right insertion slot 15, and the terminal 2 originally inserted into the right insertion slot 15 is now inserted into the left insertion slot 15. At this time, the male connector 23 of the left terminal 2 is offset to the right relative to the pin 21; the male connector 23 of the right terminal 2 is offset to the left relative to the pin 21. The two male connectors 23 face each other, and the distance between their center lines in the first direction is L-2δ. The misalignment of the two terminals 2 is now located on the outer side opposite to each other, that is, the misalignment of the left terminal 2 is on its left side, and the misalignment of the right terminal 2 is on its right side, forming an "outward V" shape.

[0042] The "inward-pointing" and "outward-pointing" configurations are visually distinct. Workers can visually inspect along the assembly line or use a machine vision system to capture images of the upper plate 12 to determine the current configuration based on whether the misalignment is on the inside or outside. If terminal 2 is inserted in the wrong direction during assembly, the misalignment will not match the target configuration and can be immediately detected and corrected. After the product is shipped, maintenance personnel can also quickly identify the coil terminal center distance specifications by observing the direction of the misalignment without measurement.

[0043] refer to Figure 6 and Figure 7The mounting position is an insertion slot 15 formed on the upper end plate 12. Limiting steps 25 are formed on both sides of the pin portion 21. When the pin portion 21 is inserted into the insertion slot 15 from top to bottom, the limiting steps 25 abut against the end face of the insertion slot 15, preventing the terminal 2 from continuing to descend. The limiting steps 25 of the two terminals 2 are at the same distance from the front end of the pin portion 21. Therefore, after the two terminals 2 are inserted, the height of the male insertion portion 23 protruding from the upper surface of the upper end plate 12 is consistent, preventing one from being higher than the other.

[0044] The pin portion 21 is narrower at the front and wider at the rear. The front end, where the pin portion 21 first enters the insertion groove 15, is narrower in the first direction to facilitate alignment during insertion. The rear end, near the limiting step 25, is wider in the first direction. The width of the insertion groove 15 matches the width of the rear end of the pin portion 21. When the pin portion 21 is fully inserted, the rear end fits tightly with the insertion groove 15 in the first direction, securing the terminal 2 within the insertion groove 15 and preventing it from loosening.

[0045] refer to Figure 6 and Figure 7 The portion of the pin 21 that inserts into the insertion slot 15 has a notch or hole for the encapsulating material to fill and anchor. The notch can be a recess formed by punching inward from the side of the pin 21, and the hole can be a through hole punched in the middle of the pin 21. When the terminal 2 is subjected to an outward pull-out force, the plastic block filled in the notch or hole prevents the pin 21 from exiting, significantly improving the pull-out resistance of the terminal 2.

[0046] refer to Figure 6 and Figure 7 The pin portion 21 is also provided with pins 24, which extend from the edge of the notch or hole and are bent to form pins for connecting enameled wire.

[0047] refer to Figure 8 In this embodiment, L is 13.8 mm and δ is 0.6 mm. L is taken as the arithmetic midpoint of the center distance between the two target terminals, which are 15 mm and 12.6 mm, and δ is taken as one-quarter of the difference between the two target distances. In the first configuration, the center-line distance between the two male connectors 23 is L + 2δ = 13.8 + 2 × 0.6 = 15 mm; in the second configuration, the center-line distance between the two male connectors 23 is L - 2δ = 13.8 - 2 × 0.6 = 12.6 mm.

[0048] The injection molding material for the skeleton 1 can be polybutylene terephthalate reinforced with 30% glass fiber, or polyamide 66 reinforced with 30% glass fiber. The substrate for the terminal 2 can be brass strip, phosphor bronze strip, or tin bronze strip, and the mating section surface of the male connector 23 is plated with copper-tin or nickel-tin.

[0049] refer to Figure 1 and Figure 2 This embodiment provides a coil, including a bobbin 1, two terminals 2, enameled wire, and a plastic encapsulation layer 3. The two terminals 2 are inserted into the insertion slots 15 of the bobbin 1 according to the target terminal center distance requirement in either a first configuration or a second configuration, and the tail of the prong portion 21 is tightly fitted and fixed to the insertion slot 15 in a first direction.

[0050] The enameled wire is wound in layers along the outer cylindrical surface of the winding drum 11. Its starting end and ending end are fixed to the pins of the two terminals 2 by soldering or resistance welding, and the solder joint is completely covered by the subsequent plastic sealing layer 3.

[0051] The molding compound 3 is formed by injection molding using the skeleton 1, terminals 2, and enameled wire as inserts, and is made of thermosetting resin or other plastics. The molding compound 3 covers most of the outer surfaces of the winding bobbin 11, the enameled wire, the upper end plate 12, and the lower end plate 13, as well as the pin portions 21 and connecting portions 22 of the two terminals 2. The mating sections of the male insertion portions 23 of the two terminals 2 extend beyond the molding compound 3 for mating with the main unit's socket. The molding compound 3 has openings at both ends of the central through-hole 14 for inserting the iron core or magnetic sleeve. It should be noted that after the enameled wire is wound onto the winding bobbin 11, an insulating varnish can be applied to the outer layer of the enameled wire before molding to improve the insulation effect.

[0052] After injection molding, when the male connector 23 is subjected to insertion and extraction forces during assembly or after-sales maintenance, the force is transmitted through the connecting part 22 to the plastic seal layer 3 and the anchoring structure in the insertion groove 15, and is borne by the plastic seal layer 3 as a whole, so the terminal 2 will not be pulled out or loosened from the skeleton 1.

[0053] The coil provided in this embodiment can be used as the excitation coil for a water inlet solenoid valve, a drain solenoid valve, a fluid control valve, an ice maker solenoid valve, a water purifier solenoid valve, a dishwasher solenoid valve, or a coffee machine solenoid valve.

[0054] like Figure 9 and Figure 10 As shown, due to the different positions of the steps formed on the inner or outer sides of the two male connectors 23 in the first and second configurations, the location of the step on the inner or outer side can be directly observed from the appearance of the coil after the product is encapsulated. Therefore, without the need to measure the terminal center distance with measuring tools, it is possible to intuitively and quickly determine whether the current product belongs to the 15mm or 12.6mm specification simply by visual inspection. This significantly reduces the difficulty of specification identification in finished product inspection, shipment sorting, and after-sales maintenance, and also avoids the mixing of products of different specifications due to their indistinguishable appearance. It should be noted that in existing conventional products, the 12.6mm specification male connector does not have a step on the outer side, while in this embodiment, the 12.6mm specification product has a step on the outer side of the male connector, forming a specification identification feature that can be directly observed.

[0055] In addition, the specifications of both unsealed and sealed coils can be directly identified by their appearance, enabling full-process specification identification from skeleton component manufacturing to finished product shipment.

Claims

1. A frame assembly with adjustable terminal spacing, characterized in that, include: A skeleton for winding enameled wire, the skeleton having two mounting positions spaced apart along a first direction, the center lines of the two mounting positions being spaced apart by a distance L in the first direction; Both terminals have a pin portion and a male portion, and the terminal is connected to the frame by the pin portion cooperating with the mounting position; Of the two terminals, the center line of the male connector of one terminal has a negative offset value δ relative to the center line of the pin portion in the first direction, and the center line of the male connector of the other terminal has a positive offset value δ relative to the center line of the pin portion in the first direction. The two terminals are configured to be inserted into the frame in two ways: In the first configuration, the distance between the center lines of the male connectors of the two terminals in the first direction is L+2δ; In the second configuration, the distance between the center lines of the male connectors of the two terminals in the first direction is L-2δ; The two terminals are interchanged in the first configuration and the second configuration so that the same skeleton assembly corresponds to two different terminal center distance standards.

2. The adjustable terminal spacing frame assembly according to claim 1, characterized in that, A connecting portion is formed between the pin portion and the male plug portion; the connecting portion and the male plug portion are aligned on one side in the first direction, and the connecting portion and the male plug portion are misaligned on the other side in the first direction.

3. The adjustable terminal spacing frame assembly according to claim 2, characterized in that, The two terminals are misaligned in opposite directions, such that in the first configuration, the two misalignments are located on the inner sides of the two terminals opposite to each other, and in the second configuration, the two misalignments are located on the outer sides of the two terminals opposite to each other.

4. The adjustable terminal spacing frame assembly according to claim 1, characterized in that, The two mounting positions are mirror images of each other with respect to the central plane of the skeleton in the first direction.

5. A frame assembly with adjustable terminal spacing according to claim 1, characterized in that, The mounting position is an insertion slot formed on the frame, and the two sides of the plug portion have limiting steps that abut against the end face of the insertion slot.

6. The adjustable terminal spacing frame assembly according to claim 5, characterized in that, The pin portion is narrower at the front and wider at the back from its front end to its rear end; The tail of the pin portion is tightly fitted with the insertion groove in the first direction, and the pin portion has a gap with the insertion groove in a direction perpendicular to the first direction.

7. A frame assembly with adjustable terminal spacing according to claim 5, characterized in that, The portion of the pin that is inserted into the insertion slot forms a notch or hole.

8. A frame assembly with adjustable terminal spacing according to claim 7, characterized in that, The pin portion has pins that extend from the edge of the notch or hole and are bent to form leads.

9. A frame assembly with adjustable terminal spacing according to any one of claims 1-8, characterized in that, L=13.8mm, δ=0.6mm.

10. A coil, characterized in that, It includes the adjustable-pitch skeleton assembly as described in claim 9, the enameled wire wound on the skeleton, and the plastic encapsulation layer covering the skeleton, the pin portions of the two terminals and the enameled wire.

Images