Relay coil assembly and relay

Abstract

Disclosed are a relay coil assembly and a relay having an electrical isolation method that can reliably isolate the coil from the high-voltage components of the relay, has a simple structure, and is very low-cost. [Solution] The relay coil assembly comprises a coil frame including a cylindrical portion (303) located between an upper flange (301) and a lower flange (302), a coil (31) wound around the cylindrical portion of the coil frame, and a first insulating tape (32) wound around and bonded to the outer circumferential surfaces of the upper and lower flanges, located in a space enclosed by the first insulating tape, and the coil is sealed in an annular sealed space (300) defined by the first insulating tape and the coil frame.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims the benefit of Chinese Patent Application No. CN202422769493.7, filed with the China National Intellectual Property Administration on November 13, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a relay coil assembly and a relay including the relay coil assembly.

Background Art

[0003] In the prior art, a relay generally includes an outer insulating shell, a metal shell, an inner insulating shell, an insulating cover, a pair of stationary terminals, a movable terminal, a relay coil assembly, a magnetic plate, and a driving assembly. The metal shell is installed in the outer insulating shell. The inner insulating shell is installed in the metal shell. The insulating cover is attached to the upper opening of the outer insulating shell. The pair of stationary terminals is fixed to the insulating cover and extends into the inner insulating shell. The movable terminal is installed in the inner insulating shell and can move between a closed position in electrical contact with the pair of stationary terminals and an open position electrically separated from the pair of stationary terminals. The relay coil assembly is installed in the metal shell. The relay coil assembly includes a coil skeleton and a coil wound around the coil skeleton. The magnetic plate is supported on the upper surface of the coil skeleton. The driving assembly includes a driving shaft, an insulating base, a limiting bracket, a contact spring, a return spring, and a movable magnetic core. The upper end of the driving shaft is fixed to the insulating base, the limiting bracket is fixed to the insulating base, the movable terminal is attached to the limiting bracket, and the contact spring is compressed between the movable terminal and the insulating base. The movable magnetic core is installed in the coil skeleton, and the lower end of the driving shaft is fixed to the movable magnetic core and moves axially together with the movable magnetic core. The return spring is compressed between the magnetic plate and the movable magnetic core.

[0004] The relay coil is used to connect to a low-voltage control circuit. The relay's stationary and movable terminals are used to connect to a high-voltage load circuit. The insulating base electrically isolates the relay's high-voltage components (stationary terminals, movable terminals, limiting bracket, metal shell, etc.) from the drive shaft and magnetic plate, achieving electrical isolation between the relay's high-voltage components and low-voltage components (coil, etc.). However, this electrical isolation method is structurally complex and costly. [Overview of the project] [Problems that the invention aims to solve]

[0005] This invention was made to overcome or mitigate at least one of the above-mentioned drawbacks. [Means for solving the problem]

[0006] According to an aspect of the present invention, a relay coil assembly is provided. The relay coil assembly comprises a coil skeleton including an upper flange, a lower flange, and a cylindrical portion located between the upper and lower flanges; a coil wound around the cylindrical portion of the coil skeleton; and a first insulating tape wound around and adhered to the outer circumferential surfaces of the upper and lower flanges. The coil skeleton is located in a space enclosed by the first insulating tape, and the coil is sealed in an annular sealed space defined by the first insulating tape and the coil skeleton.

[0007] According to an exemplary embodiment of the present invention, a portion of the first insulating tape is also adhered to the peripheral edge of the upper surface of the upper flange and the peripheral edge of the bottom surface of the lower flange.

[0008] According to another exemplary embodiment of the present invention, the coil frame further includes two columnar sections formed on the upper surface of the upper flange, with slots formed in the columnar sections for inserting coil terminals, and the two connecting ends of the coil each extending into the slots in the columnar sections to be electrically connected to the coil terminals inserted into the slots in the two columnar sections.

[0009] According to another exemplary embodiment of the present invention, the relay coil assembly further comprises a single second insulating tape, the single second insulating tape being simultaneously wrapped around and bonded to the outside of two columnar portions, so that the two columnar portions are located in a space enclosed by the single second insulating tape.

[0010] According to another exemplary embodiment of the present invention, the relay coil assembly further comprises two second insulating tapes, the two second insulating tapes being wrapped around and adhered to the outside of two column portions, respectively, so that the column portions are located in a space enclosed by the second insulating tapes.

[0011] According to another exemplary embodiment of the present invention, a first slit is formed in the upper flange, and a second slit connected to the slot is formed in the side wall of the column, and the connecting end of the coil passes through the upper flange through the first slit and enters the slot through the second slit.

[0012] According to another exemplary embodiment of the present invention, the relay coil assembly further comprises a single third insulating tape, which is simultaneously adhered to one side of the two column portions and the upper surface of the upper flange to cover the exposed portions of the two connecting ends of the coil.

[0013] According to another exemplary embodiment of the present invention, the relay coil assembly further comprises two third insulating tapes, the two third insulating tapes being adhered to one side of the two column portions and the upper surface of the upper flange, respectively, to cover the exposed portions of the two connecting ends of the coil, respectively.

[0014] According to another exemplary embodiment of the present invention, a radially projecting positioning ring is formed on the cylindrical portion of the coil skeleton, and the positioning ring is used to position the movable magnetic core of the relay in an axial contact with the positioning flange of the movable magnetic core in an initial position.

[0015] According to another exemplary embodiment of the present invention, the relay coil assembly further comprises a magnetic tube, which is inserted into and fixed at the lower end of the cylindrical portion of the coil frame and located below a positioning ring, and the lower end surface of the magnetic tube is used to electrically contact the inside of the bottom wall of the metal shell of the relay.

[0016] According to another exemplary embodiment of the present invention, the coil frame is injection-molded onto the magnetic tube, and thus the coil frame and the magnetic tube become a single integrated component.

[0017] According to another exemplary embodiment of the present invention, there is a predetermined gap between the first insulating tape and the coil, so that the first insulating tape does not come into contact with the coil.

[0018] According to another aspect of the present invention, a relay is provided. The relay comprises a metal shell, the relay coil assembly disposed in the metal shell, and a magnetic plate attached to the metal shell and supported on the upper surface of the upper flange of the coil frame. The outer surface of the magnetic plate is in electrical contact with the inner surface of the metal shell, and the first insulating tape electrically insulates the coil frame from the metal shell.

[0019] According to another exemplary embodiment of the present invention, the relay further comprises an outer insulating shell on which a metal shell is arranged, the metal shell and the outer insulating shell having an upper opening, and the relay coil assembly is mounted on the metal shell through the upper opening of the metal shell and the outer insulating shell and supported by the bottom wall of the metal shell.

[0020] According to another exemplary embodiment of the present invention, the outer insulating shell is injection-molded onto a metal shell, and the outer insulating shell and the metal shell are integrated into a single component.

[0021] According to another exemplary embodiment of the present invention, the relay further comprises an insulating cover attached to the upper opening of an outer insulating shell, an inner insulating shell provided on the upper part of a metal shell and having a bottom opening, and an insulating seat attached to the bottom opening of the inner insulating shell and supported on the upper surface of a magnetic plate.

[0022] According to another exemplary embodiment of the present invention, the relay further includes a pair of stationary terminals fixed to an insulating cover and extending into an inner insulating shell, and a movable terminal movably disposed in the inner insulating shell. The movable terminal can move between a closed position in electrical contact with the pair of stationary terminals and an open position electrically separated from the pair of stationary terminals.

[0023] According to another exemplary embodiment of the present invention, the relay further includes a movable magnetic core movably provided on a cylindrical portion of a coil skeleton, and a drive shaft installed on the cylindrical portion of the coil skeleton, passing through a magnetic plate and an insulating seat portion, and entering the inner insulating shell. The movable terminal is attached to the upper end portion of the drive shaft, and the lower end portion of the drive shaft is fixed to the movable magnetic core and moves axially together with the movable magnetic core.

[0024] According to another exemplary embodiment of the present invention, the relay further includes a support washer installed on the insulating seat portion, a limiting ring fixed to the upper end portion of the drive shaft for abutting against the upper surface of the movable terminal, and a contact spring axially compressed between the support washer and the bottom surface of the movable terminal and used to apply an electrical contact force to the movable terminal.

[0025] According to another exemplary embodiment of the present invention, a through hole through which the drive shaft can pass is formed in the magnetic plate and the insulating seat portion, and a protruding ring is formed on the bottom surface of the insulating seat portion. The protruding ring is inserted into and positioned in the through hole of the magnetic plate.

[0026] According to another exemplary embodiment of the present invention, the relay further includes a return spring. The return spring is mounted on the drive shaft and axially compressed between the movable magnetic core and the protruding ring of the magnetic plate or the insulating seat portion. When the coil is energized, the drive shaft drives the movable terminal to move from the open position to the closed position under the action of electromagnetic force. When the coil loses power, the drive shaft drives the movable terminal to move from the closed position to the open position under the elastic return force of the return spring.

[0027] According to another exemplary embodiment of the present invention, the relay further includes a pair of coil terminals. The pair of coil terminals are respectively inserted into the slots of the two columns of the coil skeleton and are electrically connected to the two connection ends of the coil. The upper ends of the pair of stationary terminals extend from the insulating cover for electrically connecting to the high-voltage load circuit, and the upper ends of the pair of coil terminals extend from the insulating cover for electrically connecting to the low-voltage control circuit.

[0028] According to another exemplary embodiment of the present invention, the insulating cover has a first electrical insulating wall formed on the upper surface of the insulating cover. The first electrical insulating wall electrically insulates the coil terminal from the stationary terminal and increases the creepage distance between the coil terminal and the stationary terminal.

[0029] According to another exemplary embodiment of the present invention, the insulating cover also has a second electrical insulating wall formed on the upper surface of the insulating cover. The second electrical insulating wall intersects perpendicularly with the first electrical insulating wall. The second electrical insulating wall electrically insulates the pair of stationary terminals and increases the creepage distance between the pair of stationary terminals.

[0030] In the above exemplary embodiment according to the present invention, by winding and attaching an insulating tape to the coil skeleton, the coil is sealed in an annular sealed space defined by the insulating tape and the coil skeleton, thereby reliably insulating the coil from the high-voltage components of the relay. The electrical insulation method of the present invention has a simple structure and is very low in cost.

[0031] The above and other features of the present invention will become more apparent by describing the exemplary embodiments of the present invention in detail while referring to the accompanying drawings.

Brief Description of the Drawings

[0032] [Figure 1] It is an explanatory perspective view of a relay according to an exemplary embodiment of the present invention. [Figure 2] It is a cross-sectional view of a relay according to an exemplary embodiment of the present invention. [Figure 3]This is a descriptive perspective view of a relay coil assembly according to an exemplary embodiment of the present invention. [Figure 4] This is an exploded view illustrating a relay coil assembly of a relay according to an exemplary embodiment of the present invention. [Figure 5] This is an exploded view illustrating a relay coil assembly of a relay according to an exemplary embodiment of the present invention. [Figure 6] This is an exploded view illustrating a relay coil assembly of a relay according to an exemplary embodiment of the present invention. [Figure 7] This is a cross-sectional view of a relay coil assembly according to an exemplary embodiment of the present invention. [Figure 8] This is a plan cross-sectional view of a relay coil assembly according to an exemplary embodiment of the present invention. [Figure 9] This is a plan cross-sectional view of a relay coil assembly of a relay according to another exemplary embodiment of the present invention. [Modes for carrying out the invention]

[0033] Illustrative embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, the same reference numerals refer to the same elements. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so as to make the present disclosure thorough and complete and so as to fully convey the concepts of the present disclosure to those skilled in the art.

[0034] The following detailed description includes numerous specific details for illustrative purposes to provide a thorough understanding of the disclosed embodiments. However, it will be apparent that one or more embodiments can be carried out without these specific details. In other examples, well-known structures and apparatus are shown schematically for the sake of simplifying the drawings.

[0035] According to the general concept of the present invention, a relay coil assembly is provided. The relay coil assembly comprises a coil frame including an upper flange, a lower flange, and a cylindrical portion located between the upper and lower flanges; a coil wound around the cylindrical portion of the coil frame; and a first insulating tape wound around and bonded to the outer circumferential surfaces of the upper and lower flanges. The coil frame is located in a space enclosed by the first insulating tape, and the coil is sealed in an annular sealed space defined by the first insulating tape and the coil frame.

[0036] According to another general concept of the present invention, a relay is provided. The relay comprises a metal shell, the relay coil assembly disposed in the metal shell, and a magnetic plate attached to the metal shell and supported on the upper surface of the upper flange of the coil frame. The outer surface of the magnetic plate is in electrical contact with the inner surface of the metal shell, and a first insulating tape electrically insulates the coil frame from the metal shell.

[0037] Figure 1 shows an explanatory perspective view of a relay according to an exemplary embodiment of the present invention. Figure 2 shows a cross-sectional view of a relay according to an exemplary embodiment of the present invention. Figure 3 shows an explanatory perspective view of a relay coil assembly 3 according to an exemplary embodiment of the present invention. Figure 4 shows an explanatory exploded view of a relay coil assembly 3 according to an exemplary embodiment of the present invention. Figure 5 shows an explanatory exploded view of a relay coil assembly 3 according to an exemplary embodiment of the present invention. Figure 6 shows an explanatory exploded view of a relay coil assembly 3 according to an exemplary embodiment of the present invention. Figure 7 shows a cross-sectional view of a relay coil assembly 3 according to an exemplary embodiment of the present invention. Figure 8 shows a plan cross-sectional view of a relay coil assembly 3 according to an exemplary embodiment of the present invention.

[0038] As shown in Figures 1 to 8, an exemplary embodiment of the present invention discloses a relay coil assembly 3. The relay coil assembly 3 comprises a coil frame 30, a coil 31, and a first insulating tape 32. The coil frame 30 includes an upper flange 301, a lower flange 302, and a cylindrical portion 303 located between the upper flange 301 and the lower flange 302. The coil 31 is wound around the cylindrical portion 303 of the coil frame 30. The first insulating tape 32 is wound around and adhered to the outer surfaces of the upper flange 301 and the lower flange 302. The coil frame 30 is located in a space enclosed by the first insulating tape 32, and the coil 31 is sealed in an annular sealed space 300 defined by the first insulating tape 32 and the coil frame 30.

[0039] Figure 9 shows a plan cross-sectional view of a relay coil assembly 3 according to another exemplary embodiment of the present invention.

[0040] The difference between the relay coil assembly 3 shown in Figure 9 and the relay coil assemblies 3 shown in Figures 1 to 8 is that a portion of the first insulating tape 32 is also adhered to the peripheral edges of the upper surface of the upper flange 301 and the bottom surface of the lower flange 302. In this way, the electrical insulation performance can be further improved.

[0041] As shown in Figures 1 to 8, in the illustrated embodiment, the coil frame 30 further includes two columnar portions 304 formed on the upper surface of the upper flange 301, with slots 30a formed in the columnar portions 304 for inserting coil terminals 8. Two connecting ends 31a of the coil 31 extend into the slots 30a of the columnar portions 304 to electrically connect to the coil terminals 8 inserted into the slots 30a of the two columnar portions 304.

[0042] As shown in Figures 1 to 8, in the illustrated embodiment, the relay coil assembly 3 further comprises a single second insulating tape 33, which is simultaneously wrapped around and adhered to the outside of the two column portions 304, thereby locating the two column portions 304 in a space enclosed by the single second insulating tape 33.

[0043] However, the present invention is not limited to the illustrated embodiments. For example, in another exemplary embodiment of the present invention, the relay coil assembly further comprises two second insulating tapes 33, the two second insulating tapes 33 being wrapped around and adhered to the outside of two column portions 304, respectively, so that the column portions 304 are located in a space enclosed by the second insulating tapes 33.

[0044] As shown in Figures 1 to 8, in the illustrated embodiment, a first slit 30c is formed in the upper flange 301, and a second slit 30b connected to the slot 30a is formed in the side wall of the column portion 304. The connecting end 31a of the coil 31 passes through the upper flange 301 through the first slit 30c and enters the slot 30a through the second slit 30b.

[0045] As shown in Figures 1 to 8, in the illustrated embodiment, the relay coil assembly 3 further comprises a single third insulating tape 34 which is simultaneously adhered to one side of the two column portions 304 and the upper surface of the upper flange 301, covering the exposed portions of the two connecting ends 31a of the coil 31.

[0046] However, the present invention is not limited to the illustrated embodiments. For example, in another exemplary embodiment of the present invention, the relay coil assembly 3 further comprises two third insulating tapes 34, the two third insulating tapes 34 being adhered to one side of two column portions 304 and the upper surface of the upper flange 301, respectively, to cover the exposed portions of the two connecting ends 31a of the coil 31, respectively.

[0047] As shown in Figures 1 to 8, in the illustrated embodiment, a radially protruding positioning ring 30d is formed on the cylindrical portion 303 of the coil frame 30. The positioning ring 30d is used to position the movable magnetic core 61 of the relay in an initial position by axially contacting the positioning flange 61d of the movable magnetic core 61.

[0048] As shown in Figures 1 to 8, in the illustrated embodiment, the relay coil assembly 3 further comprises a magnetic tube 35, which is inserted into and fixed at the lower end of the cylindrical portion 303 of the coil frame 30 and is located below the positioning ring 30d. The lower end surface of the magnetic tube 35 is used to make electrical contact with the inside of the bottom wall of the metal shell 4 of the relay.

[0049] As shown in Figures 1 to 8, in the illustrated embodiment, the coil frame 30 is injection molded onto the magnetic tube 35, and therefore the coil frame 30 and the magnetic tube 35 become a single integrated component.

[0050] As shown in Figures 1 to 8, in the illustrated embodiment, there is a predetermined gap between the first insulating tape 32 and the coil 31, and therefore the first insulating tape 32 does not come into contact with the coil 31. In this way, the electrical insulation performance can be further improved. For example, the problem of the first insulating tape 32 being dielectric broken down by the metal shell 4 at high voltage due to pinholes in the enameled wire of the coil can be prevented.

[0051] As shown in Figures 1 to 8, a relay is disclosed in another exemplary embodiment of the present invention. The relay comprises a metal shell 4, a relay coil assembly 3, and a magnetic plate 5. The relay coil assembly 3 is mounted on the metal shell 4. The magnetic plate 5 is mounted on the metal shell 4 and supported on the upper surface of the upper flange 301 of the coil frame 30. The outer circumferential surface of the magnetic plate 5 is in electrical contact with the inner circumferential surface of the metal shell 4, and the first insulating tape 32 electrically insulates the coil frame 30 from the metal shell 4.

[0052] As shown in Figures 1 to 8, in the illustrated embodiment, the relay also includes an outer insulating shell 10. The metal shell 4 is mounted on the outer insulating shell 10. The metal shell 4 and the outer insulating shell 10 have upper openings, and the relay coil assembly 3 is attached to the metal shell 4 through the upper openings of the metal shell 4 and the outer insulating shell 10 and supported by the bottom wall of the metal shell 4.

[0053] As shown in Figures 1 to 8, in the illustrated embodiment, the outer insulating shell 10 is injection molded onto the metal shell 4, and the outer insulating shell 10 and the metal shell 4 are integrated into a single component.

[0054] As shown in Figures 1 to 8, in the illustrated embodiment, the relay further comprises an insulating cover 11, an inner insulating shell 70, and an insulating seat portion 71. The insulating cover 11 is attached to the upper opening of the outer insulating shell 10. The inner insulating shell 70 is located on top of the metal shell 4 and has a bottom opening. The insulating seat portion 71 is attached to the bottom opening of the inner insulating shell 70 and is supported on the upper surface of the magnetic plate 5.

[0055] As shown in Figures 1 to 8, in the illustrated embodiment, the relay further comprises a pair of stationary terminals 1 and a movable terminal 2. The pair of stationary terminals 1 are fixed to an insulating cover 11 and extend into an inner insulating shell 70. The movable terminal 2 is movably positioned within the inner insulating shell 70. The movable terminal 2 can move between a closed position in which it electrically contacts the pair of stationary terminals 1 and an open position in which it is electrically isolated from the pair of stationary terminals 1.

[0056] As shown in Figures 1 to 8, in the illustrated embodiment, the relay further comprises a movable magnetic core 61 and a drive shaft 60. The movable magnetic core 61 is movably positioned in the cylindrical portion 303 of the coil frame 30. The drive shaft 60 is installed in the cylindrical portion 303 of the coil frame 30 and penetrates the magnetic plate 5 and the insulating seat portion 71 to enter the inner insulating shell 70. The movable terminal 2 is attached to the upper end of the drive shaft 60, and the lower end of the drive shaft 60 is fixed to the movable magnetic core 61 and moves axially together with the movable magnetic core 61.

[0057] As shown in Figures 1 to 8, in the illustrated embodiment, the relay further comprises a support washer 64, a limiting ring 63, and a contact spring 62. The support washer 64 is installed on the insulating seat portion 71. The limiting ring 63 is fixed to the upper end of the drive shaft 60 and is used to contact the upper surface of the movable terminal 2. The contact spring 62 is compressed axially between the support washer 64 and the bottom surface of the movable terminal 2 and is used to apply an electrical contact force to the movable terminal 2.

[0058] As shown in Figures 1 to 8, in the illustrated embodiment, through holes through which the drive shaft 60 can pass are formed in the magnetic plate 5 and the insulating seat portion 71, respectively, and a protruding ring 71 is formed on the bottom surface of the insulating seat portion 71, and the protruding ring 71 is inserted into the through hole in the magnetic plate 5 and positioned.

[0059] As shown in Figures 1 to 8, in the illustrated embodiment, the relay further comprises a return spring 65, which is attached to the drive shaft 60 and is compressed axially between the movable magnetic core 61 and the protruding ring 71 of the magnetic plate 5 or insulating seat portion 71. When the coil 31 is energized, the drive shaft 60 drives the movable terminal 2 from the open position to the closed position by the action of electromagnetic force. When the coil 31 loses power, the drive shaft 60 drives the movable terminal 2 to move from the closed position to the open position by the elastic returning force of the return spring 65. When the movable terminal 2 is in the open position, the movable magnetic core is in its initial position.

[0060] As shown in Figures 1 to 8, in the illustrated embodiment, the relay also includes a pair of coil terminals 8. The pair of coil terminals 8 are respectively inserted into slots 30a of two column portions 304 of the coil frame 30 and are electrically connected to two connection ends 31a of the coil 31. The upper ends of the pair of stationary terminals 1 extend from the insulating cover 11 for electrical connection to a high-voltage load circuit, and the upper ends of the pair of coil terminals 8 extend from the insulating cover 11 for electrical connection to a low-voltage control circuit.

[0061] As shown in Figures 1 to 8, in the illustrated embodiment, the insulating cover 11 has a first electrical insulating wall 11a formed on its upper surface, and the first electrical insulating wall 11a electrically insulates the coil terminal 8 from the stationary terminal 1, thereby increasing the creepage distance between the coil terminal 8 and the stationary terminal 1.

[0062] As shown in Figures 1 to 8, in the illustrated embodiment, the insulating cover 11 also has a second electrical insulating wall 11b formed on its upper surface, the second electrical insulating wall 11b intersects perpendicularly with the first electrical insulating wall 11a. The second electrical insulating wall 11b electrically insulates the pair of stationary terminals 1 and increases the creepage distance between the pair of stationary terminals 1.

[0063] Those skilled in the art should understand that the embodiments described above are illustrative and not limiting. For example, those skilled in the art can make many modifications to the embodiments described above without structural or principle contradictions, and can freely combine the various features described in different embodiments.

[0064] While several exemplary embodiments have been illustrated and described, it will be understood by those skilled in the art that various modifications or changes can be made to these embodiments without departing from the principles and spirit of this disclosure. The scope of this disclosure is defined in the claims and its equivalents.

[0065] When used herein, elements described in the singular form and preceded by the words "a" or "an" should be understood not to exclude the plural forms of such elements or steps unless it is explicitly stated that such exclusion is excluded. Furthermore, references to “one embodiment” of the present invention are not intended to be construed as excluding the existence of additional embodiments that likewise incorporate the described features. Moreover, unless it is expressly stated otherwise, embodiments that “compile” or “have” one or more elements having a particular characteristic may include additional such elements that do not possess that characteristic.

Claims

1. A relay coil assembly, - A coil frame (30) including an upper flange (301), a lower flange (302), and a cylindrical portion (303) located between the upper flange (301) and the lower flange (302), - The coil (31) is wound around the cylindrical portion (303) of the coil frame (30), - The first insulating tape (32) is wrapped around and adhered to the outer circumferential surfaces of the upper flange (301) and the lower flange (302) and Equipped with, A relay coil assembly in which the coil frame (30) is located in a space enclosed by the first insulating tape (32), and the coil (31) is sealed in an annular sealed space (300) defined by the first insulating tape (32) and the coil frame (30).

2. The relay coil assembly according to claim 1, wherein a portion of the first insulating tape (32) is also adhered to the peripheral edge of the upper surface of the upper flange (301) and the peripheral edge of the bottom surface of the lower flange (302).

3. The coil frame (30) further includes two columnar portions (304) formed on the upper surface of the upper flange (301), and slots (30a) for inserting coil terminals (8) are formed in the columnar portions (304). The relay coil assembly according to claim 1, wherein the two connecting ends (31a) of the coil (31) extend into the slots (30a) of the two column portions (304) to electrically connect to the coil terminals (8) inserted into the slots (30a) of the column portions (304).

4. The relay coil assembly according to claim 3, further comprising a single second insulating tape (33) which is simultaneously wrapped around and adhered to the outside of the two column portions (304), so that the two column portions (304) are located in a space enclosed by the single second insulating tape (33).

5. The relay coil assembly according to claim 3, further comprising two second insulating tapes (33), the two second insulating tapes (33) being wrapped around and adhered to the outside of the two column portions (304), respectively, so that the column portions (304) are located in a space enclosed by the second insulating tapes (33).

6. A first slit (30c) is formed in the upper flange (301), and a second slit (30b) connected to the slot (30a) is formed in the side wall of the column portion (304). The relay coil assembly according to claim 4, wherein the connecting end (31) of the coil (31) passes through the first slit (30c) and through the upper flange (301), and enters the slot (30a) through the second slit (30b).

7. The relay coil assembly according to claim 6, further comprising a single third insulating tape (34) which is simultaneously adhered to one side of the two column portions (304) and the upper surface of the upper flange (301) to cover the exposed portions of the two connecting ends (31a) of the coil (31).

8. The relay coil assembly according to claim 6, further comprising two third insulating tapes (34), the two third insulating tapes (34) being adhered to one side of the two column portions (304) and the upper surface of the upper flange (301), respectively, to cover the exposed portions of the two connecting ends (31a) of the coil (31).

9. A radially projecting positioning ring (30d) is formed on the cylindrical portion (303) of the coil frame (30), and the positioning ring (30d) is used to abut axially against the positioning flange (61d) of the movable magnetic core (61) of the relay to position the movable magnetic core (61) to its initial position, as described in claim 1.

10. The present invention further comprises a magnetic tube (35), the magnetic tube (35) being inserted into and fixed at the lower end of the cylindrical portion (303) of the coil frame (30), and located below the positioning ring (30d), The relay coil assembly according to claim 9, wherein the lower end surface of the magnetic tube (35) is used to electrically contact the inside of the bottom wall of the metal shell (4) of the relay.

11. The relay coil assembly according to claim 10, wherein the coil frame (30) is injection molded onto the magnetic tube (35), and therefore the coil frame (30) and the magnetic tube (35) form a single integrated component.

12. A relay coil assembly according to any one of claims 1 to 11, wherein there is a predetermined gap between the first insulating tape (32) and the coil (31), and therefore the first insulating tape (32) does not come into contact with the coil (31).

13. It's a relay, Metal shell (4) and The relay coil assembly (3) according to any one of claims 1 to 12 is disposed on the metal shell (4), A magnetic plate (5) is attached to the metal shell (4) and is supported on the upper surface of the upper flange (301) of the coil frame (30). Equipped with, A relay in which the outer surface of the magnetic plate (5) is in electrical contact with the inner surface of the metal shell (4), and the first insulating tape (32) electrically insulates the coil frame (30) from the metal shell (4).

14. The metal shell (4) is further provided as an outer insulating shell (10) on which the metal shell (4) is arranged. The relay according to claim 13, wherein the metal shell (4) and the outer insulating shell (10) have upper openings, and the relay coil assembly (3) is attached to the metal shell (4) through the upper openings of the metal shell (4) and the outer insulating shell (10) and supported by the bottom wall of the metal shell (4).

15. The relay according to claim 14, wherein the outer insulating shell (10) is injection molded onto the metal shell (4), and the outer insulating shell (10) and the metal shell (4) are made into a single integrated component.

16. An insulating cover (11) is attached to the upper opening of the outer insulating shell (10), An inner insulating shell (70) is provided on the upper part of the metal shell (4) and has a bottom opening, An insulating seat portion (71) is attached to the bottom opening of the inner insulating shell (70) and is supported on the upper surface of the magnetic plate (5). The relay according to claim 14, further comprising:

17. A pair of stationary terminals (1) are fixed to the insulating cover (11) and extend into the inner insulating shell (70), The movable terminal (2) is movably positioned on the inner insulating shell (70) and Furthermore, The relay according to claim 16, wherein the movable terminal (2) can move between a closed position in which it is electrically in contact with the pair of stationary terminals (1) and an open position in which it is electrically isolated from the pair of stationary terminals (1).

18. A movable magnetic core (61) is movably provided on the cylindrical portion (303) of the coil frame (30), A drive shaft (60) is installed in the cylindrical portion (303) of the coil frame (30), and penetrates the magnetic plate (5) and the insulating seat portion (71) to enter the inner insulating shell (70). Furthermore, The relay according to claim 17, wherein the movable terminal (2) is attached to the upper end of the drive shaft (60), and the lower end of the drive shaft (60) is fixed to the movable magnetic core (61) and moves axially together with the movable magnetic core (61).

19. A support washer (64) is installed on the insulating seat portion (71), A limiting ring (63) is fixed to the upper end of the drive shaft (60) so as to contact the upper surface of the movable terminal (2), A contact spring (62) is compressed axially between the support washer (64) and the bottom surface of the movable terminal (2) and is used to apply an electrical contact force to the movable terminal (2). The relay according to claim 18, further comprising:

20. The relay according to claim 19, wherein a through hole through which the drive shaft (60) can pass is formed in the magnetic plate (5) and the insulating seat portion (71), a protruding ring (7100) is formed on the bottom surface of the insulating seat portion (71), and the protruding ring (7100) is inserted into the through hole in the magnetic plate (5) and positioned.

21. The present invention further comprises a return spring (65), the return spring (65) being mounted on the drive shaft (60) and being compressed axially between the movable magnetic core (61) and the magnetic plate (5) or the protruding ring (71) of the insulating seat portion (71), When current is supplied to the coil (31), the drive shaft (60) is driven by electromagnetic force to move the movable terminal (2) from the open position to the closed position. The relay according to claim 19, wherein when the coil (31) loses power, the drive shaft (60) is driven by the elastic restorative force of the return spring (65) to move the movable terminal (2) from the closed position to the open position.

22. The coil further comprises a pair of coil terminals (8), the pair of coil terminals (8) being inserted into the slots (30a) of the two column portions (304) of the coil frame (30) and electrically connected to the two connecting ends (31a) of the coil (31). The relay according to any one of claims 17 to 21, wherein the upper ends of the pair of stationary terminals (1) extend from the insulating cover (11) for electrical connection to a high-voltage load circuit, and the upper ends of the pair of coil terminals (8) extend from the insulating cover (11) for electrical connection to a low-voltage control circuit.

23. The relay according to claim 22, wherein the insulating cover (11) has a first electrical insulating wall (11a) formed on the upper surface of the insulating cover (11), and the first electrical insulating wall (11a) electrically insulates the coil terminal (8) from the stationary terminal (1) to increase the creepage distance between the coil terminal (8) and the stationary terminal (1).

24. The insulating cover (11) also has a second electrical insulating wall (11b) formed on the upper surface of the insulating cover (11), the second electrical insulating wall (11b) intersects perpendicularly with the first electrical insulating wall (11a), The relay according to claim 23, wherein the second electrical insulating wall (11b) electrically insulates the pair of stationary terminals (1) and increases the creepage distance between the pair of stationary terminals (1).

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