Relay coil assembly and relay

Abstract

The utility model discloses a relay coil assembly and a relay. The relay coil assembly comprises a coil framework which comprises an upper flange plate, a lower flange plate and a cylindrical part located between the upper flange plate and the lower flange plate; the coil is wound on the cylindrical part of the coil framework; and the first insulating tape is wound and bonded on the peripheral surfaces of the upper flange plate and the lower flange plate, the coil framework is positioned in a space surrounded by the first insulating tape, and the coil is sealed in an annular closed space defined by the first insulating tape and the coil framework. According to the utility model, the coil is sealed in the annular closed space defined by the insulating tape and the coil framework by winding and sticking the insulating tape on the coil framework, so that the coil can be reliably and electrically isolated from the high-voltage component of the relay. According to the electric isolation scheme, the structure is simple, and the cost is very low.

Description

Technical Field

[0001] The utility model relates to a relay coil component and a relay comprising the relay coil component. Background Art

[0002] In the prior art, a relay typically comprises an outer insulating shell, a metal shell, an inner insulating shell, an insulating cover, a pair of static terminals, a movable terminal, a relay coil assembly, a magnetic conductive plate, and a drive assembly. The metal shell is positioned within the outer insulating shell. The inner insulating shell is positioned within the metal shell. The insulating cover is mounted within the top opening of the outer insulating shell. The pair of static terminals are secured to the insulating cover and extend into the inner insulating shell. The movable terminal is movably mounted within the inner insulating shell, capable of moving between a closed position, in electrical contact with the pair of static terminals, and an open position, in electrical separation from the pair of static terminals. The relay coil assembly is positioned within the metal shell. The relay coil assembly includes a coil bobbin and a coil wound around the coil bobbin. The magnetic conductive plate is supported on the top surface of the coil bobbin. The drive assembly includes a drive shaft, an insulating base, a stop frame, a contact spring, a return spring, and a movable magnetic core. The upper end of the drive shaft is secured to the insulating base, the stop frame is secured to the insulating base, the movable terminal is movably mounted within the stop frame, and the contact spring is compressed between the movable terminal and the insulating base. The moving magnetic core is movably arranged in the coil frame, the lower end of the driving shaft is fixed to the moving magnetic core so as to move axially with the moving magnetic core, and the return spring is compressed between the magnetic conductive plate and the moving magnetic core.

[0003] The relay's coil is connected to a low-voltage control circuit. The relay's static and dynamic terminals are connected to a high-voltage load circuit. An insulating base electrically isolates the relay's high-voltage components (e.g., static and dynamic terminals, retaining bracket, magnetic plate, and metal housing) from the drive shaft and magnetic plate, thus achieving electrical isolation between the relay's high-voltage components and low-voltage components (e.g., the coil). However, this electrical isolation solution is complex and costly. Utility Model Content

[0004] The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and defects in the prior art.

[0005] According to one aspect of the present invention, a relay coil assembly is provided. The relay coil assembly comprises: a coil bobbin 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 bobbin; and a first insulating tape wound around and bonded to the outer circumferential surfaces of the upper and lower flanges, the coil bobbin being located in a space surrounded by the first insulating tape, and the coil being sealed in the annular closed space defined by the first insulating tape and the coil bobbin.

[0006] According to an exemplary embodiment of the present invention, a portion of the first insulating tape is also bonded to a peripheral portion of the top surface of the upper flange and a peripheral portion of the bottom surface of the lower flange.

[0007] According to another exemplary embodiment of the present invention, the coil skeleton also includes two columnar parts formed on the top surface of the upper flange, and slots for plugging in coil terminals are formed in the columnar parts; the two connecting ends of the coil respectively extend into the slots of the two columnar parts, for electrical connection with the coil terminals inserted into the slots of the columnar parts.

[0008] According to another exemplary embodiment of the present invention, the relay coil assembly further includes: a single second insulating tape, which is simultaneously wrapped and bonded to the outer sides of the two columnar portions, so that the two columnar portions are located in the space surrounded by the single second insulating tape.

[0009] According to another exemplary embodiment of the present invention, the relay coil assembly further includes: two second insulating tapes, which are respectively wrapped around and bonded to the outer sides of the two columnar portions, so that the columnar portions are located in the space surrounded by the second insulating tapes.

[0010] According to another exemplary embodiment of the present invention, a first slit is formed on the upper flange, and a second slit connected to the slot is formed on the side wall of the columnar portion; the connection end of the coil passes through the upper flange via the first slit and enters the slot via the second slit.

[0011] According to another exemplary embodiment of the present invention, the relay coil assembly further includes: a single third insulating tape, which is simultaneously pasted to one side of the two columnar portions and the top surface of the upper flange to cover the exposed portions of the two connecting ends of the coil.

[0012] According to another exemplary embodiment of the present invention, the relay coil assembly further includes: two third insulating tapes, which are respectively pasted to one side of the two columnar portions and the top surface of the upper flange to respectively cover the exposed portions of the two connecting ends of the coil.

[0013] According to another exemplary embodiment of the present invention, a radially protruding positioning ring is formed in the cylindrical portion of the coil bobbin, and the positioning ring is used to axially abut against a positioning flange of the moving magnetic core of the relay to position the moving magnetic core in an initial position.

[0014] According to another exemplary embodiment of the present invention, the relay coil assembly further includes: a magnetic cylinder, which is inserted and fixed into the lower end of the cylindrical portion of the coil skeleton and is located below the positioning ring, and the lower end surface of the magnetic cylinder is used to electrically contact the inner side of the bottom wall of the metal shell of the relay.

[0015] According to another exemplary embodiment of the present invention, the coil bobbin is injection molded onto the magnetic conductive cylinder, so that the coil bobbin and the magnetic conductive cylinder become an integrated part.

[0016] According to another exemplary embodiment of the present invention, a predetermined gap is provided between the first insulating tape and the coil, so that the first insulating tape does not contact the coil.

[0017] According to another aspect of the present invention, a relay is provided. The relay comprises: a metal shell; the relay coil assembly described above, disposed within the metal shell; and a magnetic conductive plate disposed within the metal shell and supported on the top surface of the upper flange of the coil bobbin. The outer circumference of the magnetic conductive plate is in electrical contact with the inner circumference of the metal shell, and the first insulating tape electrically isolates the coil bobbin from the metal shell.

[0018] According to an exemplary embodiment of the present invention, the relay further comprises: an outer insulating shell, the metal shell being disposed in the outer insulating shell, the metal shell and the outer insulating shell having top openings, the relay coil assembly being mounted in the metal shell via the top openings of the metal shell and the outer insulating shell and supported on the bottom wall of the metal shell.

[0019] According to another exemplary embodiment of the present invention, the outer insulating shell is injection-molded onto the metal shell, so that the outer insulating shell and the metal shell form an integral piece.

[0020] According to another exemplary embodiment of the present invention, the relay further includes: an insulating cover installed in the top opening of the outer insulating shell; an inner insulating shell arranged in the upper part of the metal shell and having a bottom opening; and an insulating seat installed in the bottom opening of the inner insulating shell and supported on the top surface of the magnetic conductive plate.

[0021] According to another exemplary embodiment of the present invention, the relay further includes: a pair of static terminals fixed to the insulating cover and extending into the inner insulating shell; and a movable terminal movably disposed in the inner insulating shell, the movable terminal being capable of moving between a closed position in electrical contact with the pair of static terminals and an open position in electrical separation from the pair of static terminals.

[0022] According to another exemplary embodiment of the present invention, the relay further comprises: a moving magnetic core movably disposed within the cylindrical portion of the coil bobbin; and a drive shaft disposed within the cylindrical portion of the coil bobbin and extending through the magnetic conductive plate and the insulating seat into the inner insulating housing. The moving terminal is mounted to the upper end of the drive shaft, and the lower end of the drive shaft is fixed to the moving magnetic core for axial movement therewith.

[0023] According to another exemplary embodiment of the present invention, the relay further includes: a support washer, disposed on the insulating seat; a limit ring, fixed to the upper end of the drive shaft, for abutting against the top surface of the movable terminal; and a contact spring, axially compressed between the support washer and the bottom surface of the movable terminal, for applying electrical contact force to the movable terminal.

[0024] According to another exemplary embodiment of the present invention, a through hole allowing the drive shaft to pass through is formed on the magnetic conductive plate and the insulating seat, and a raised ring is formed on the bottom surface of the insulating seat, and the raised ring is inserted into and positioned in the through hole of the magnetic conductive plate.

[0025] According to another exemplary embodiment of the present invention, the relay further comprises a return spring mounted on the drive shaft and axially compressed between the moving magnetic core and the magnetic conductive plate or the raised ring of the insulating seat. When the coil is energized, the drive shaft, under the action of electromagnetic force, drives the moving terminal from the open position to the closed position. When the coil is de-energized, the drive shaft, under the action of the elastic return force of the return spring, drives the moving terminal from the closed position to the open position.

[0026] According to another exemplary embodiment of the present invention, the relay further includes: a pair of coil terminals, which are respectively inserted into the slots of the two columnar portions of the coil skeleton and electrically connected to the two connection ends of the coil, respectively; the upper ends of the pair of static terminals extend from the insulating cover for electrically connecting to a high-voltage load circuit; and the upper ends of the pair of coil terminals extend from the insulating cover for electrically connecting to a low-voltage control circuit.

[0027] According to another exemplary embodiment of the present invention, the insulating cover has a first electrical isolation wall formed on a top surface thereof, and the first electrical isolation wall electrically isolates the coil terminal from the static terminal to increase a creepage distance between the coil terminal and the static terminal.

[0028] According to another exemplary embodiment of the present invention, the insulating cover also has a second electrical isolation wall formed on its top surface, and the second electrical isolation wall intersects with the first electrical isolation wall vertically; the second electrical isolation wall electrically isolates the pair of static terminals to increase the creepage distance between the pair of static terminals.

[0029] In the aforementioned exemplary embodiments of the present invention, by wrapping and affixing insulating tape around the coil bobbin, the coil is sealed in an annular, enclosed space defined by the insulating tape and the coil bobbin, thereby reliably electrically isolating the coil from the high-voltage components of the relay. This electrical isolation solution of the present invention is simple in structure and very low in cost.

[0030] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A perspective schematic diagram showing a relay according to an exemplary embodiment of the present utility model;

[0032] Figure 2 A cross-sectional view showing a relay according to an exemplary embodiment of the present invention;

[0033] Figure 3 A perspective schematic diagram showing a relay coil assembly of a relay according to an exemplary embodiment of the present utility model;

[0034] Figure 4 An exploded schematic diagram showing a relay coil assembly of a relay according to an exemplary embodiment of the present invention;

[0035] Figure 5 Another exploded schematic diagram showing a relay coil assembly of a relay according to an exemplary embodiment of the present invention;

[0036] Figure 6 Another exploded schematic diagram showing a relay coil assembly of a relay according to an exemplary embodiment of the present invention;

[0037] Figure 7 A cross-sectional view showing a relay coil assembly of a relay according to an exemplary embodiment of the present invention;

[0038] Figure 8 A planar cross-sectional view showing a relay coil assembly of a relay according to an exemplary embodiment of the present invention;

[0039] Figure 9A planar cross-sectional view showing a relay coil assembly of a relay according to another exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be further described in detail below through examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall concept of the present invention and should not be construed as limiting the present invention.

[0041] In addition, in the following detailed description, for ease of explanation, numerous specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments can be practiced without these specific details. In other cases, well-known structures and devices are shown in diagrammatic form to simplify the accompanying drawings.

[0042] According to a general technical concept of the present invention, a relay coil assembly is provided. The relay coil assembly comprises: a coil bobbin 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 bobbin; and a first insulating tape wrapped around and bonded to the outer circumferential surfaces of the upper and lower flanges, the coil bobbin being located in a space surrounded by the first insulating tape, and the coil being sealed in the annular closed space defined by the first insulating tape and the coil bobbin.

[0043] According to another general technical concept of the present invention, a relay is provided. The relay comprises: a metal housing; the relay coil assembly described above, disposed within the metal housing; and a magnetic conductive plate disposed within the metal housing and supported on the top surface of the upper flange of the coil bobbin. The outer circumference of the magnetic conductive plate is in electrical contact with the inner circumference of the metal housing, and a first insulating tape electrically isolates the coil bobbin from the metal housing.

[0044] Figure 1 A perspective schematic diagram showing a relay according to an exemplary embodiment of the present utility model; Figure 2 A cross-sectional view showing a relay according to an exemplary embodiment of the present invention; Figure 3 A perspective schematic diagram showing a relay coil assembly 3 according to an exemplary embodiment of the present utility model; Figure 4 An exploded schematic diagram showing a relay coil assembly 3 according to an exemplary embodiment of the present utility model; Figure 5 Another exploded schematic diagram showing a relay coil assembly 3 according to an exemplary embodiment of the present invention; Figure 6Another exploded schematic diagram showing a relay coil assembly 3 according to an exemplary embodiment of the present invention; Figure 7 A cross-sectional view showing a relay coil assembly 3 according to an exemplary embodiment of the present invention; Figure 8 A planar cross-sectional view of a relay coil assembly 3 according to an exemplary embodiment of the present invention is shown.

[0045] like Figures 1 to 8 As shown, in an exemplary embodiment of the present invention, a relay coil assembly 3 is disclosed. The relay coil assembly 3 includes: a coil bobbin 30, a coil 31 and a first insulating tape 32. The coil bobbin 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 on the cylindrical portion 303 of the coil bobbin 30. The first insulating tape 32 is wound and bonded to the outer circumferential surfaces of the upper flange 301 and the lower flange 302. The coil bobbin 30 is located in the space surrounded by the first insulating tape 32, and the coil 31 is sealed in the annular closed space 300 defined by the first insulating tape 32 and the coil bobbin 30.

[0046] Figure 9 A planar cross-sectional view of a relay coil assembly 3 according to another exemplary embodiment of the present invention is shown.

[0047] Figure 9 The relay coil assembly 3 shown is Figures 1 to 8 The difference of the relay coil assembly 3 shown is that a portion of the first insulating tape 32 is also bonded to the periphery of the top surface of the upper flange 301 and the periphery of the bottom surface of the lower flange 302. This can further improve the electrical isolation performance.

[0048] like Figures 1 to 8 As shown, in the illustrated embodiment, the coil bobbin 30 further includes two columnar portions 304 formed on the top surface of the upper flange 301. Slots 30a for receiving the coil terminals 8 are formed in the columnar portions 304. The two connecting ends 31a of the coil 31 extend into the slots 30a of the two columnar portions 304, respectively, for electrical connection with the coil terminals 8 inserted into the slots 30a of the columnar portions 304.

[0049] like Figures 1 to 8 As shown, in the illustrated embodiment, the relay coil assembly 3 further includes a single second insulating tape 33, which is simultaneously wrapped and bonded to the outer sides of the two columnar portions 304, so that the two columnar portions 304 are located in the space surrounded by the single second insulating tape 33.

[0050] 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 includes two second insulating tapes 33, which are respectively wrapped around and bonded to the outer sides of the two columnar portions 304, so that the columnar portions 304 are located in the space surrounded by the second insulating tapes 33.

[0051] like Figures 1 to 8 As shown, in the illustrated embodiment, a first slit 30c is formed in the upper flange 301, and a second slit 30b communicating with the slot 30a is formed in the sidewall of the columnar portion 304. The connecting end 31a of the coil 31 passes through the upper flange 301 via the first slit 30c and enters the slot 30a via the second slit 30b.

[0052] like Figures 1 to 8 As shown, in the illustrated embodiment, the relay coil assembly 3 further includes a single third insulating tape 34, which is simultaneously pasted to one side of the two columnar portions 304 and the top surface of the upper flange 301 to cover the exposed portions of the two connection ends 31a of the coil 31.

[0053] 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 includes two third insulating tapes 34, which are respectively pasted to one side of the two columnar portions 304 and the top surface of the upper flange 301 to respectively cover the exposed portions of the two connection ends 31a of the coil 31.

[0054] like Figures 1 to 8 As shown, in the illustrated embodiment, a radially protruding positioning ring 30d is formed in the cylindrical portion 303 of the coil skeleton 30, and the positioning ring 30d is used to axially abut against the positioning flange 61d of the moving magnetic core 61 of the relay to position the moving magnetic core 61 in the initial position.

[0055] like Figures 1 to 8 In the illustrated embodiment, the relay coil assembly 3 further includes a magnetic tube 35, which is inserted into and fixed to the lower end of the cylindrical portion 303 of the coil bobbin 30 and located below the positioning ring 30d. The lower end surface of the magnetic tube 35 is configured to electrically contact the inner side of the bottom wall of the metal shell 4 of the relay.

[0056] like Figures 1 to 8 As shown, in the illustrated embodiment, the coil bobbin 30 is injection molded onto the magnetic conductive cylinder 35 , so that the coil bobbin 30 and the magnetic conductive cylinder 35 become an integral part.

[0057] like Figures 1 to 8As shown, in the illustrated embodiment, a predetermined gap is provided between the first insulating tape 32 and the coil 31, preventing the first insulating tape 32 from contacting the coil 31. This further improves electrical isolation. For example, it prevents the first insulating tape 32 from being punctured by the high voltage of the metal shell 4 due to pinholes in the coil's enameled wire.

[0058] like Figures 1 to 8 As shown, in another exemplary embodiment of the present invention, a relay is disclosed. The relay includes a metal housing 4, a relay coil assembly 3, and a magnetic conductive plate 5. The relay coil assembly 3 is mounted within the metal housing 4. The magnetic conductive plate 5 is disposed within the metal housing 4 and supported on the top surface of the upper flange 301 of the coil bobbin 30. The outer circumference of the magnetic conductive plate 5 is in electrical contact with the inner circumference of the metal housing 4. A first insulating tape 32 electrically isolates the coil bobbin 30 from the metal housing 4.

[0059] like Figures 1 to 8 As shown, in the illustrated embodiment, the relay further includes an outer insulating housing 10. The metal housing 4 is disposed in the outer insulating housing 10. The metal housing 4 and the outer insulating housing 10 have top openings, and the relay coil assembly 3 is installed in the metal housing 4 via the top openings of the metal housing 4 and the outer insulating housing 10 and is supported on the bottom wall of the metal housing 4.

[0060] like Figures 1 to 8 As shown, in the illustrated embodiment, the outer insulating shell 10 is injection molded onto the metal shell 4 so that the outer insulating shell 10 and the metal shell 4 form an integral piece.

[0061] like Figures 1 to 8 As shown, in the illustrated embodiment, the relay further includes an insulating cover 11, an inner insulating shell 70, and an insulating seat 71. The insulating cover 11 is mounted in the top opening of the outer insulating shell 10. The inner insulating shell 70 is disposed in the upper portion of the metal shell 4 and has a bottom opening. The insulating seat 71 is mounted in the bottom opening of the inner insulating shell 70 and supported on the top surface of the magnetic conductive plate 5.

[0062] like Figures 1 to 8 As shown, in the illustrated embodiment, the relay further includes a pair of static terminals 1 and a movable terminal 2. The pair of static terminals 1 are fixed to the insulating cover 11 and extend into the inner insulating housing 70. One movable terminal 2 is movably disposed within the inner insulating housing 70. The movable terminal 2 is movable between a closed position in which it is in electrical contact with the pair of static terminals 1 and an open position in which it is electrically separated from the pair of static terminals 1.

[0063] like Figures 1 to 8As shown, in the illustrated embodiment, the relay further includes a moving magnetic core 61 and a drive shaft 60. The moving magnetic core 61 is movably disposed within the cylindrical portion 303 of the coil bobbin 30. The drive shaft 60 is disposed within the cylindrical portion 303 of the coil bobbin 30 and passes through the magnetic conductive plate 5 and the insulating seat 71 into the inner insulating housing 70. The moving terminal 2 is mounted to the upper end of the drive shaft 60, and the lower end of the drive shaft 60 is fixed to the moving magnetic core 61 to move axially with the moving magnetic core 61.

[0064] like Figures 1 to 8 As shown, in the illustrated embodiment, the relay further comprises a support washer 64, a retaining ring 63, and a contact spring 62. The support washer 64 is disposed on an insulating seat 71. The retaining ring 63 is fixed to the upper end of the drive shaft 60 and is configured to abut against the top surface of the movable terminal 2. The contact spring 62 is axially compressed between the support washer 64 and the bottom surface of the movable terminal 2, thereby applying an electrical contact force to the movable terminal 2.

[0065] like Figures 1 to 8 As shown, in the illustrated embodiment, a through hole allowing the drive shaft 60 to pass through is formed on the magnetic conductive plate 5 and the insulating seat 71, and a raised ring 71a is formed on the bottom surface of the insulating seat 71, which is inserted and positioned into the through hole of the magnetic conductive plate 5.

[0066] like Figures 1 to 8 As shown, in the illustrated embodiment, the relay further includes a return spring 65, which is mounted on the drive shaft 60 and axially compressed between the moving magnetic core 61 and the magnetic conductive plate 5 or the raised ring 71a of the insulating seat 71. When the coil 31 is energized, the drive shaft 60, under the action of electromagnetic force, drives the moving terminal 2 from the open position to the closed position. When the coil 31 is de-energized, the drive shaft 60, under the action of the elastic return force of the return spring 65, drives the moving terminal 2 from the closed position to the open position. When the moving terminal 2 is in the open position, the moving magnetic core is positioned in its initial position.

[0067] like Figures 1 to 8 As shown, in the illustrated embodiment, the relay further includes a pair of coil terminals 8. The coil terminals 8 are inserted into the slots 30a of the two columnar portions 304 of the coil bobbin 30 and are electrically connected to the two connection ends 31a of the coil 31. The upper ends of the static terminals 1 extend from the insulating cover 11 for electrical connection to the high-voltage load circuit, while the upper ends of the coil terminals 8 extend from the insulating cover 11 for electrical connection to the low-voltage control circuit.

[0068] like Figures 1 to 8 As shown, in the illustrated embodiment, the insulating cover 11 has a first electrical isolation wall 11 a formed on the top surface thereof, and the first electrical isolation wall 11 a electrically isolates the coil terminal 8 from the static terminal 1 to increase the creepage distance between the coil terminal 8 and the static terminal 1 .

[0069] like Figures 1 to 8 As shown, in the illustrated embodiment, the insulating cover 11 further has a second electrical isolation wall 11b formed on its top surface, the second electrical isolation wall 11b perpendicularly intersecting the first electrical isolation wall 11a. The second electrical isolation wall 11b electrically isolates the pair of static terminals 1 to increase the creepage distance between the pair of static terminals 1.

[0070] Those skilled in the art will understand that the embodiments described above are exemplary and can be improved by those skilled in the art. The structures described in the various embodiments can be freely combined without causing any conflicts in structure or principle. These changes should fall within the scope of protection of the present invention.

[0071] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify the preferred implementations of the present invention and should not be construed as limiting the present invention.

[0072] Although some embodiments of the general concept of the present invention have been shown and described, it will be understood by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general concept of the present invention, the scope of which is defined by the claims and their equivalents.

[0073] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. In addition, any element number in the claims should not be construed as limiting the scope of the present invention.

Claims

1. A relay coil assembly, characterized in that: include: A coil skeleton (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); a coil (31) wound on the cylindrical portion (303) of the coil bobbin (30); and A first insulating tape (32) is wound around and bonded to the outer circumference of the upper flange (301) and the lower flange (302). The coil skeleton (30) is located in a space surrounded by the first insulating tape (32), and the coil (31) is sealed in an annular closed space (300) defined by the first insulating tape (32) and the coil skeleton (30).

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

3. The relay coil assembly according to claim 1, wherein: The coil frame (30) further includes two columnar portions (304) formed on the top surface of the upper flange (301), wherein slots (30a) for plugging in coil terminals (8) are formed in the columnar portions (304); The two connection ends (31a) of the coil (31) extend into the slots (30a) of the two columnar parts (304) respectively, and are used to be electrically connected to the coil terminals (8) inserted into the slots (30a) of the columnar parts (304).

4. The relay coil assembly according to claim 3, wherein: Also includes: A single second insulating tape (33) is simultaneously wound and bonded to the outer sides of the two columnar portions (304), so that the two columnar portions (304) are located in a space surrounded by the single second insulating tape (33).

5. The relay coil assembly according to claim 3, wherein: Also includes: Two second insulating tapes (33) are respectively wound around and bonded to the outer sides of the two columnar parts (304), so that the columnar parts (304) are located in the space surrounded by the second insulating tapes (33).

6. The relay coil assembly according to claim 4, wherein: A first slit (30c) is formed on the upper flange (301), and a second slit (30b) communicating with the slot (30a) is formed on the side wall of the columnar portion (304); The connection end (31a) of the coil (31) passes through the upper flange (301) via the first slit (30c) and enters the slot (30a) via the second slit (30b).

7. The relay coil assembly according to claim 6, wherein: Also includes: A single third insulating tape (34) is simultaneously adhered to one side of the two columnar portions (304) and the top 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, wherein: Also includes: Two third insulating tapes (34) are respectively adhered to one side of the two columnar portions (304) and the top surface of the upper flange (301) to respectively cover the exposed portions of the two connecting ends (31a) of the coil (31).

9. The relay coil assembly according to claim 1, wherein: A radially protruding positioning ring (30d) is formed in the cylindrical portion (303) of the coil skeleton (30). The positioning ring (30d) is used to axially abut against a positioning flange (61d) of a moving magnetic core (61) of a relay to position the moving magnetic core (61) at an initial position.

10. The relay coil assembly according to claim 9, wherein: Also includes: The magnetic conductive cylinder (35) is inserted and fixed into the lower end of the cylindrical portion (303) of the coil skeleton (30) and is located below the positioning ring (30d). The lower end surface of the magnetic conductive cylinder (35) is used for electrically contacting the inner side of the bottom wall of the metal shell (4) of the relay.

11. The relay coil assembly according to claim 10, wherein: The coil skeleton (30) is injection-molded onto the magnetic conductive cylinder (35), so that the coil skeleton (30) and the magnetic conductive cylinder (35) become an integrated part.

12. The relay coil assembly according to any one of claims 1 to 11, characterized in that: There is a predetermined gap between the first insulating tape (32) and the coil (31), so that the first insulating tape (32) does not contact the coil (31).

13. A relay, characterized in that: include: Metal shell (4); The relay coil assembly (3) according to any one of claims 1 to 12, arranged in the metal shell (4); and A magnetic conductive plate (5) is arranged in the metal shell (4) and supported on the top surface of the upper flange (301) of the coil frame (30). The outer peripheral surface of the magnetic conductive plate (5) is in electrical contact with the inner peripheral surface of the metal shell (4), and the first insulating tape (32) electrically isolates the coil skeleton (30) from the metal shell (4).

14. The relay according to claim 13, characterized in that Also includes: an outer insulating shell (10), wherein the metal shell (4) is arranged in the outer insulating shell (10), The metal shell (4) and the outer insulating shell (10) have top openings, and the relay coil assembly (3) is installed in the metal shell (4) via the top openings of the metal shell (4) and the outer insulating shell (10) and is supported on the bottom wall of the metal shell (4).

15. The relay according to claim 14, characterized in that: The outer insulating shell (10) is injection-molded onto the metal shell (4), so that the outer insulating shell (10) and the metal shell (4) become an integral piece.

16. The relay according to claim 14, wherein: Also includes: an insulating cover (11) mounted in the top opening of the outer insulating shell (10); an inner insulating shell (70) disposed in the upper portion of the metal shell (4) and having a bottom opening; and An insulating seat (71) is installed in the bottom opening of the inner insulating shell (70) and is supported on the top surface of the magnetic conductive plate (5).

17. The relay according to claim 16, characterized in that Also includes: a pair of static terminals (1) fixed to the insulating cover (11) and extending into the inner insulating shell (70); and A movable terminal (2) is movably arranged in the inner insulating shell (70), The movable terminal (2) is movable between a closed position in electrical contact with the pair of static terminals (1) and an open position in electrical separation from the pair of static terminals (1).

18. The relay according to claim 17, wherein: Also includes: A moving magnetic core (61) is movably disposed in the cylindrical portion (303) of the coil skeleton (30); and A drive shaft (60) is disposed in the cylindrical portion (303) of the coil frame (30) and passes through the magnetic conductive plate (5) and the insulating seat (71) to enter the inner insulating shell (70). The movable terminal (2) is mounted on 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) so as to move axially along with the movable magnetic core (61).

19. The relay according to claim 18, wherein: Also includes: A support washer (64) is disposed on the insulating seat (71); A limiting snap ring (63) is fixed to the upper end of the drive shaft (60) and is used to abut against the top surface of the movable terminal (2); and A contact spring (62) is axially compressed 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).

20. The relay according to claim 19, wherein: A through hole allowing the drive shaft (60) to pass through is formed on the magnetic conductive plate (5) and the insulating seat (71), and a raised ring (71a) is formed on the bottom surface of the insulating seat (71), and the raised ring (71a) is inserted into and positioned in the through hole of the magnetic conductive plate (5).

21. The relay according to claim 19, wherein Also includes: A return spring (65) is mounted on the drive shaft (60) and is axially compressed between the moving magnetic core (61) and the magnetic conductive plate (5) or the raised ring (71a) of the insulating seat (71). When the coil (31) is energized, the drive shaft (60) drives the movable terminal (2) from the open position to the closed position under 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 under the action of the elastic reset force of the reset spring (65).

22. The relay according to any one of claims 17 to 21, characterized in that: Also includes: A pair of coil terminals (8) are respectively inserted into the slots (30a) of the two columnar portions (304) of the coil skeleton (30) and are respectively electrically connected to the two connection ends (31a) of the coil (31). The upper ends of the pair of static 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, characterized in that: The insulating cover (11) has a first electrical isolation wall (11a) formed on its top surface, and the first electrical isolation wall (11a) electrically isolates the coil terminal (8) and the static terminal (1) to increase the creepage distance between the coil terminal (8) and the static terminal (1).

24. The relay according to claim 23, characterized in that: The insulating cover (11) further has a second electrical isolation wall (11b) formed on the top surface thereof, wherein the second electrical isolation wall (11b) intersects the first electrical isolation wall (11a) perpendicularly; The second electrical isolation wall (11b) electrically isolates the pair of static terminals (1) to increase the creepage distance between the pair of static terminals (1).

Images