A coil frame and its ultra-miniature relay

Abstract

This invention discloses a coil frame and its ultra-miniature relay. The coil frame includes a U-shaped iron core, plastic flanges formed at both ends of the U-shaped iron core by injection molding, and two coil winding heads injection molded to the U-shaped iron core at one of the plastic flanges. One of the plastic flanges has a barb and a groove. This invention, through the combination of barbs and grooves for positioning, enables the winding clamping machine to achieve positioning in six directions: up, down, left, right, front, and back, thus achieving stable clamping of the coil frame during winding.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to a coil frame and its ultra-miniature relay. Background Technology

[0002] Existing miniature relays typically include a moving spring armature, a base, and a housing. The base is formed by injection molding a coil and a stationary spring with stationary contacts. The coil includes a coil and coil leads, and the coil itself comprises a coil frame and enameled wire wound around the coil frame. The main shortcomings of this type of miniature relay are as follows: the coil is formed by winding enameled wire around the coil frame, which is formed by injection molding a U-shaped iron core and a coil winding head using plastic assembly. The coil frame is dumbbell-shaped, narrow in the middle and wide at both ends. The middle horizontal side of the U-shaped iron core is smaller, serving as the winding window for the enameled wire, while the two vertical sides are larger, forming barriers that limit the coil length and outer diameter. The coil winding head is located at one end of a vertical side on either side of the coil frame. Due to the small size of the coil frame, these miniature relays typically use machine gripping and positioning for automatic winding. To ensure winding efficiency, multiple coil frames are usually clamped simultaneously, and high-speed winding is used. In some winding applications, the winding speed can reach over 10,000 r / min. Due to the small size of the parts and the complexity of the structure and manufacturing process, the existing technology has the following problems: ① The space at both ends of the coil frame is limited, and there is no stable and reliable clamping structure to form a constraint in the length, width, and height directions of the coil frame. The consistency of the clamping position is not guaranteed, which affects the winding accuracy of the coil winding head position during winding. This can easily lead to loose winding and falling off. Deviation in the winding head position can cause excessive soldering or poor soldering, or scratches on the enameled wire insulation layer or even breakage of the wire; ② When the machine clamps the coil frame, the axis of the machine's rotating mechanism is not collinear with the axis of rotation of the coil frame winding window. When rotating at high speed, the coil The centrifugal force generated by the coil frame can easily cause deviations in the coil frame position, affecting the consistency of winding and resulting in uneven distribution of enameled wire in the winding window. In severe cases, the coil frame may even fall off during winding. ③ To make way for the coil winding head at one end of the coil frame, the existing technology sets the clamping position of the machine at the other end opposite the coil winding head. Since the clamping position and the coil winding head position are separated by the intermediate winding window, when the clamping position deviates, the deviation will be amplified because the coil winding head position is far from the clamping position. Therefore, it is not easy to ensure the winding accuracy of the coil winding head, exacerbating the related defects mentioned in point ① above. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a coil holder and its ultra-miniature relay, so that the machine can complete the positioning in six directions (up, down, left, right, front, and back) when clamping the coil holder, thereby achieving stable clamping of the coil holder during winding.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: a coil frame, including a U-shaped iron core, plastic flanges formed at both ends of the U-shaped iron core by injection molding, and two coil winding heads injection molded together with the U-shaped iron core at one of the plastic flanges; the iron core pole surfaces at both ends of the U-shaped iron core respectively protrude upwards above the corresponding plastic flanges; in one of the two plastic flanges, barbs and grooves are respectively provided on the upper and lower surfaces of the plastic flange; the barbs cooperate with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface for the height and length of the coil frame, and the grooves cooperate with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface for the height and width of the coil frame, thereby realizing the positioning of the coil frame in six directions during winding.

[0005] Preferably, the barb and groove are respectively located in the same plastic flange as the coil winding end.

[0006] Preferably, the barb is located below the plastic flange facing away from the iron core pole surface, and the groove is located above the plastic flange.

[0007] Preferably, there are two barbs, which are respectively located on the outer side of the coil frame along its length and symmetrically distributed along the center line of the iron core. The hook openings of the barbs are located inward, and the bottom surface of the hook openings is used to cooperate with the winding clamping machine to provide a positioning surface for the coil frame in one direction of its height. The inner and outer sides of the hook openings are used to cooperate with the winding clamping machine to provide a bidirectional positioning surface for the coil frame along its length.

[0008] Preferably, the bottom surfaces of the hook openings of the two barbs are coplanar in the height direction of the coil frame, and the corresponding inner and outer surfaces of the hook openings of the two barbs are coplanar in the length direction of the coil frame.

[0009] Preferably, a wire guide groove is provided below the plastic flange; a first plastic retaining wall is provided between the inner side of the hook opening of the barb and the wire guide groove; the top of the barb is lower than the first plastic retaining wall and is located inside the first plastic retaining wall in the width direction of the coil frame.

[0010] Preferably, the outer side of the hook opening of the barb is chamfered.

[0011] Preferably, below the plastic flange, between the two barbs, there is a plastic recessed platform that serves as a gate surface for plastic injection molding, the platform surface of which is lower than the bottom surface of the hook opening of the barb.

[0012] Preferably, the coil wrapping head includes a welding portion and a winding portion. The welding portion protrudes from the plastic flange along the length direction of the coil frame, and the winding portion protrudes from the plastic flange along the width direction of the coil frame. The extension of the barb along the length direction of the coil frame is shorter than the welding portion of the coil wrapping head. A gap is provided between the horizontal projection of the barb along the width direction of the coil frame and the horizontal projection of the winding portion of the coil wrapping head along the width direction of the coil frame.

[0013] Preferably, there are two grooves, which are respectively located on the outer side of the coil frame in the width direction and symmetrically distributed along the center line of the iron core; the bottom surface of the groove is used to cooperate with the winding clamping machine to provide the winding clamping machine with a positioning surface in another direction of the height of the coil frame, and the inner surface of the two grooves is used to cooperate with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface in the width direction of the coil frame.

[0014] Preferably, the two grooves are located on the two sides of the width of the corresponding iron core pole surface, and a plastic step is provided between the grooves and the corresponding sides of the iron core pole surface.

[0015] Preferably, a second plastic retaining wall is provided between the two grooves and the winding window of the coil frame; the outer side of the two grooves in the length direction is provided with a through structure.

[0016] Preferably, the bottom surfaces of the two grooves are coplanar in the height direction of the coil frame; the outer surfaces of the two grooves are respectively provided with chamfers.

[0017] Preferably, the center distance from the bottom surface of the groove to the center of the rotation axis in the height direction of the coil frame is approximately the same as the center distance from the bottom surface of the hook opening to the center of the rotation axis in the height direction of the coil frame.

[0018] Preferably, the two barbs are approximately equidistant from the center of the axis of rotation of the coil frame in the width direction; the two grooves are approximately equidistant from the center of rotation of the coil frame in the width direction.

[0019] The present invention also proposes an ultra-miniature relay, comprising the coil frame as described above.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention employs barbs and grooves on the upper and lower surfaces of the plastic flange, respectively. Without increasing the volume of the coil holder, the combination of barbs and grooves provides stable positioning in three directions: height, width, and length. This ensures reliable constraint in each direction, preventing positional deviations in unconstrained directions. Furthermore, by setting constraints on only one surface in each direction, this invention avoids over-constraint caused by repeated positioning. This achieves stable clamping of the coil holder during winding and improves the consistency of clamping position, thereby enhancing the quality stability of coils during batch winding. This structure also improves the consistency of winding and soldering at the coil winding head, preventing risks such as loose winding, excessive soldering, poor soldering, and broken wire.

[0022] 2. This invention employs a design that reliably accommodates and isolates the barbs and grooves from the winding window, enameled wire lead, coil winding head, and iron core pole surface, thereby preventing damage to the enameled wire and iron core and ensuring winding quality.

[0023] 3. This invention employs a method where the center distance between the bottom surface of the groove and the center of rotation axis in the height direction of the coil frame is approximately the same as the center distance between the bottom surface of the hook and the center of rotation axis in the height direction of the coil frame. Furthermore, the center distance between the two hooks and the center of rotation axis in the width direction of the coil frame is approximately the same. Similarly, the center distance between the two grooves and the center of rotation axis in the width direction of the coil frame is approximately the same. This ensures that the positioning points of the limiting hooks and grooves are collinear around the center of the rod portion of the iron core winding window. During winding, the rotation axes are collinear, reducing centrifugal force and preventing the coil frame from shifting or even falling due to centrifugal force during high-speed winding. This improves the uniformity of the enameled wire arrangement in the winding window.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the coil frame and its ultra-miniature relay of the present invention are not limited to the embodiments. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the coil frame of the present invention;

[0026] Figure 2 This is a three-dimensional structural schematic diagram (bottom facing up) of an embodiment of the coil frame of the present invention;

[0027] Figure 3 This is a three-dimensional structural schematic diagram of an embodiment of the coil frame of the present invention (rotated at an angle);

[0028] Figure 4 This is a three-dimensional structural schematic diagram of an embodiment of the coil frame of the present invention (bottom facing up, rotated at an angle);

[0029] Figure 5 This is a top view of an embodiment of the coil frame of the present invention;

[0030] Figure 6 This is a bottom view of an embodiment of the coil frame of the present invention;

[0031] Figure 7 This is a right view of an embodiment of the coil frame of the present invention;

[0032] Figure 8 This is a front view of an embodiment of the coil frame of the present invention;

[0033] Figure 9 This is a schematic diagram showing the distance between the bottom surface of the groove and the bottom surface of the hook in an embodiment of the coil frame of the present invention;

[0034] Figure 10 This is a schematic diagram showing the distance between the two barbs in the width direction of the coil frame according to an embodiment of the present invention;

[0035] Figure 11 This is a three-dimensional structural diagram of the U-shaped iron core in an embodiment of the coil frame of the present invention;

[0036] Figure 12 This is a three-dimensional structural schematic diagram (with housing) of an embodiment of the ultra-miniature relay of the present invention;

[0037] Figure 13 This is a three-dimensional structural schematic diagram (without housing) of an embodiment of the ultra-miniature relay of the present invention;

[0038] Figure 14 This is a three-dimensional structural schematic diagram of the base of an embodiment of the ultra-miniature relay of the present invention;

[0039] Figure 15 This is a schematic diagram (bottom facing up) of the coil and stationary spring in an embodiment of the ultra-miniature relay of the present invention.

[0040] Figure 16 This is a schematic diagram of the stationary spring and coil lead of an embodiment of the ultra-miniature relay of the present invention;

[0041] Figure 17 This is a schematic diagram of the coil of an embodiment of the ultra-miniature relay of the present invention. Detailed Implementation

[0042] See Figures 1 to 11As shown, a coil frame of the present invention includes a U-shaped iron core 1, plastic flanges 2 formed at both ends of the U-shaped iron core 1 by injection molding, and two coil winding heads 3 injection molded together with the U-shaped iron core 1 at one of the plastic flanges 2; the iron core pole surfaces 11 at both ends of the U-shaped iron core 1 respectively protrude upward on the corresponding plastic flanges 2, and the middle post 12 of the U-shaped iron core 1 serves as the winding post of the winding window 13; in other embodiments, the middle post 12 may also be wrapped with plastic, and the plastic part wrapped outside the middle post 12 serves as the winding post of the winding window 13; in one of the two plastic flanges 2, two barbs 21 and two grooves 23 are respectively provided on the upper and lower surfaces of the plastic flange 2; the barbs 21 and grooves 23 are respectively provided in the same plastic flange 2 as the coil winding heads 3; the barbs 21 are provided on the lower surface of the plastic flange 2 away from the iron core pole surface 11, and the grooves 23 are provided on the upper surface of the plastic flange 2. When the machine clamps the coil holder, the clamping part of the machine engages with the barb 21 and the groove 23, and is limited by the bottom surface 221 and the inner side surface 222 (i.e., the side of the hook opening 22 that is closer to the inside) and the outer side surface 223 (i.e., the side of the hook opening 22 that is closer to the outside) of the hook opening 22, as well as the bottom surface 231 and the inner side surface 232 of the groove 23. This invention utilizes the cooperation of the barb 21 with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface for the coil holder's height in one direction and its length, and utilizes the cooperation of the groove 23 with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface for the coil holder's height in another direction and its width, thereby achieving six-directional positioning of the coil holder during winding.

[0043] In this embodiment, the two barbs 21 are respectively located on the outer side of the coil frame along its length and are symmetrically distributed along the centerline of the U-shaped iron core 1. The hook openings 22 of the barbs 21 are located inwards. The bottom surface 221 of the hook opening is used to cooperate with the winding clamping machine to provide a positioning surface for the coil frame in one direction of its height. The inner surface 222 and outer surface 223 of the hook opening are used to cooperate with the winding clamping machine to provide a bidirectional positioning surface for the coil frame along its length. The bottom surfaces 221 of the hook openings of the two barbs 21 are coplanar in the height direction of the coil frame, and the corresponding inner surface 222 and outer surface 223 of the two hook openings 22 are coplanar in the length direction of the coil frame, thus preventing skewing after clamping and positioning.

[0044] In this embodiment, a wire guide groove 24 for enameled wire is also provided below the plastic flange 2; a first plastic baffle 25 is provided between the inner side 222 of the hook opening of the barb 21 and the wire guide groove 24. When the machine clamps the coil frame, the plastic baffle ensures that there is a gap between the barb and the enameled wire lead, thus preventing the enameled wire lead from scratching the machine; the top of the barb 21 is lower than the first plastic baffle 25, so that the barb 21 does not occupy additional space in the height direction of the coil frame.

[0045] In this embodiment, the outer side 223 of the hook 22 is provided with a chamfer 211 to reduce the difficulty of pre-positioning when the machine coil frame is clamped.

[0046] In this embodiment, a plastic recessed platform 26 is provided below the plastic flange 2, between the two barbs 21, to serve as a gate surface during plastic injection. The platform surface of the plastic recessed platform 26 is lower than the bottom surface 221 of the hook opening of the barb 21. The plastic recessed platform 26 can be used as a gate surface during plastic injection. By setting the steps of the plastic recessed platform 26, plastic debris from the gate is prevented from being touched and falling off when the machine is clamped, thus avoiding the generation of foreign objects.

[0047] In this embodiment, the coil winding head 3 includes a welding part 32 and a winding part 31. The welding part 32 protrudes from the plastic flange 2 along the length direction of the coil frame, and the winding part 31 protrudes from the plastic flange 2 along the width direction of the coil frame. The extension of the barb 21 in the length direction of the coil frame is shorter than that of the welding part 32 of the coil winding head 3, so that the barb 21 does not occupy additional space in the length direction of the coil frame. There is a gap between the horizontal projection of the barb 21 in the width direction of the coil frame and the horizontal projection of the winding part 31 of the coil winding head 3 in the width direction of the coil frame, so as to facilitate the machine to make room when clamping the coil frame and avoid touching the welding part 32 and causing deformation.

[0048] In this embodiment, the two grooves 23 are respectively located on the outer side of the coil frame in the width direction and are symmetrically distributed along the center line of the U-shaped iron core 1. The bottom surface 231 of the groove 23 is used to cooperate with the winding clamping machine to provide the winding clamping machine with a positioning surface in another direction for the height of the coil frame. The inner surface 232 of the two grooves 23 is used to cooperate with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface in the width direction of the coil frame. The two grooves 23 are respectively located on both sides of the width of the corresponding iron core pole surface 11. A plastic step 27 is provided between the groove 23 and the corresponding side of the iron core pole surface 11. When the machine clamps the coil frame, the plastic step 27 blocks the gap between the machine and the side of the iron core pole surface 11, thus preventing the iron core pole surface 11 from being scratched. A second plastic baffle 28 is provided between the two grooves 23 and the winding window 13 of the coil frame. During machine clamping, the second plastic baffle 28 ensures a gap between the grooves and the enameled wire inside the winding window 13, preventing the enameled wire leads from rubbing against the machine. The bottom surfaces 231 of the two grooves 23 are coplanar in the height direction of the coil frame, preventing skew after clamping and positioning. The outer surfaces 233 of the two grooves 23 are respectively provided with chamfered bevels, reducing the difficulty of pre-positioning during machine clamping. The outer sides of the two grooves 23 along their length are designed with through-hole structures, further reducing the difficulty of machine clamping.

[0049] In this embodiment, in the width direction of the coil frame, the barb 21 is located inside the first plastic retaining wall 25, and the groove 23 is located inside the second plastic retaining wall 28, without increasing the width of the coil frame.

[0050] join Figure 9 As shown, in this embodiment, the center distance from the bottom surface 231 of the groove 23 to the center of the rotation axis of the coil frame in the height direction is approximately the same as the center distance from the bottom surface 221 of the hook 21 to the center of the rotation axis of the coil frame in the height direction. The distance value is N, so that when the machine clamps the coil frame and rotates, the rotation axis of the machine is collinear with the rotation axis of the coil frame winding window 13 in the height direction, thereby reducing the centrifugal force during high-speed rotation.

[0051] See Figure 10 In this embodiment, the two barbs 21 are approximately equidistant from the center of the coil frame's rotation axis in the width direction, with a distance value of M; the two grooves 23 are approximately equidistant from the center of the coil frame's rotation axis in the width direction; so that when the machine clamps the coil frame and rotates, the machine's rotation axis is collinear with the rotation axis of the coil frame's winding window 13 in the width direction, reducing the centrifugal force during high-speed rotation.

[0052] See Figures 12 to 17The present invention provides an ultra-miniature relay comprising the above-mentioned coil frame, wherein an enameled wire is wound on the coil frame to form a coil 5, the coil lead 51 is connected to the welding part 32 of the coil winding head 3 to form a coil part 6, the coil part 6 and the stationary spring 7 are injection molded to form a base part 8, the moving spring armature assembly 9 is installed on the base part 8, and finally the outer shell 91 is installed to form an ultra-miniature relay.

[0053] This invention discloses a coil holder and its ultra-miniature relay. The coil holder features barbs 21 and grooves 23 on the upper and lower surfaces of a plastic flange 2, respectively. Without increasing the coil holder's volume, the combination of barbs 21 and grooves 22 provides stable positioning in the height, width, and length directions of the coil holder, ensuring reliable constraint in each direction and preventing positional deviations in unconstrained directions. Furthermore, by setting constraints on only one surface in each direction, the invention avoids over-constraint caused by repeated positioning, achieving stable clamping of the coil holder during winding and improving the consistency of the clamping position, thereby enhancing the coil quality stability during batch winding. This structure also improves the consistency of winding and soldering at the coil winding head, preventing risks such as loose winding, excessive soldering, poor soldering, and broken wires.

[0054] The present invention provides a coil frame and its ultra-miniature relay, which adopts a design in which the barb 21 and the groove 23 are reliably positioned and isolated from the winding window, the enameled wire lead, the coil winding head, and the iron core pole surface, thereby avoiding damage to the enameled wire and the iron core and ensuring the winding quality.

[0055] The present invention discloses a coil frame and its ultra-miniature relay, wherein the center distance between the bottom surface 231 of the groove 23 and the center distance between the bottom surface 221 of the hook 21 and the center distance between the bottom surface 221 of the hook 22 and the center distance between the bottom surface 221 of the hook 21 and the center distance between the two hooks 21 and the center distance between the two hooks 21 and the center distance between the two hooks 21 and the center distance between the two hooks 23 ...

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A coil frame, comprising a U-shaped iron core, plastic flanges formed at both ends of the U-shaped iron core by injection molding, and two coil windings injection molded together with the U-shaped iron core at one of the plastic flanges; the iron core pole faces at both ends of the U-shaped iron core respectively protrude upwards above the corresponding plastic flanges; characterized in that: In one of the two plastic flanges, a barb and a groove are respectively provided on the upper and lower surfaces of the plastic flange; the barb cooperates with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface for the height and length of the coil frame, and the groove cooperates with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface for the height and width of the coil frame, thereby realizing the positioning of the coil frame in six directions during winding; The center distance between the bottom surface of the groove and the center of the rotation axis of the coil frame in the height direction is approximately the same as the center distance between the bottom surface of the hook and the center of the rotation axis of the coil frame in the height direction; the center distance between the two hooks and the center of the rotation axis of the coil frame in the width direction is approximately the same; the center distance between the two grooves and the center of the rotation axis of the coil frame in the width direction is approximately the same.

2. The coil frame according to claim 1, characterized in that: The barb and groove are respectively located in the same plastic flange as the coil winding head.

3. The coil frame according to claim 2, characterized in that: The barb is located below the plastic flange facing away from the iron core pole surface, and the groove is located above the plastic flange.

4. The coil frame according to claim 3, characterized in that: There are two barbs, which are respectively located on the outer side of the coil frame along its length and symmetrically distributed along the center line of the iron core. The hook openings of the barbs are located inward, and the bottom surface of the hook openings is used to cooperate with the winding clamping machine to provide a positioning surface for the coil frame in one direction of its height. The inner and outer sides of the hook openings are used to cooperate with the winding clamping machine to provide a bidirectional positioning surface for the coil frame along its length.

5. The coil frame according to claim 4, characterized in that: The bottom surfaces of the hook openings of the two barbs are coplanar in the height direction of the coil frame, and the corresponding inner and outer surfaces of the hook openings of the two barbs are coplanar in the length direction of the coil frame.

6. The coil frame according to claim 4, characterized in that: The plastic flange is further provided with an enameled wire guide groove below it; a first plastic retaining wall is provided between the inner side of the hook opening of the barb and the enameled wire guide groove; the top of the barb is lower than the first plastic retaining wall and is located inside the first plastic retaining wall in the width direction of the coil frame.

7. The coil frame according to claim 5, characterized in that: Below the plastic flange, between the two barbs, there is a plastic recessed platform that serves as a gate surface for plastic injection molding. The platform surface is lower than the bottom surface of the hook opening of the barb.

8. The coil frame according to claim 5, characterized in that: The coil wrapping head includes a welding part and a winding part. The welding part protrudes from the plastic flange along the length direction of the coil frame, and the winding part protrudes from the plastic flange along the width direction of the coil frame. The extension of the barb along the length direction of the coil frame is shorter than the welding part of the coil wrapping head. A gap is provided between the horizontal projection of the barb along the width direction of the coil frame and the horizontal projection of the winding part of the coil wrapping head along the width direction of the coil frame.

9. The coil frame according to claim 4, characterized in that: There are two grooves, which are respectively located on the outer side of the coil frame in the width direction and symmetrically distributed along the center line of the iron core. The bottom surface of the groove is used to cooperate with the winding clamping machine to provide the winding clamping machine with a positioning surface in another direction of the coil frame height. The inner surface of the two grooves is used to cooperate with the winding clamping machine to provide the winding clamping machine with a bidirectional positioning surface in the width direction of the coil frame.

10. The coil frame according to claim 9, characterized in that: The two grooves are located on the two sides of the width of the corresponding iron core pole surface, and a plastic step is provided between the groove and the corresponding side of the iron core pole surface; and / or, a second plastic barrier is provided between the two grooves and the winding window of the coil frame; and / or, the outer side of the two grooves in the length direction is provided with a through structure.

11. The coil frame according to claim 9, characterized in that: The bottom surfaces of the two grooves are coplanar in the height direction of the coil frame; the outer surfaces of the two grooves are respectively provided with chamfers; and / or, the outer surface of the hook opening of the barb is provided with chamfers.

12. An ultra-miniature relay, characterized in that: Includes the coil frame as described in any one of claims 1 to 11.

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