Electrical device

Abstract

The present application relates to an electrical device comprising: a housing; the electric element is arranged in the shell; the circuit board is arranged in the shell; the contact element is provided with a main body, a first connecting part and a second connecting part, the first connecting part is located on one side of the main body, the second connecting part is located on the other side of the main body, and the contact element is electrically connected with the electric element through the first connecting part and is electrically connected with the circuit board through the second connecting part. The circuit board is provided with a first plugging hole, the metal ring is plugged in the first plugging hole of the circuit board through press fit and is provided with a second plugging hole, and the second connecting part of the contact element is plugged in the second plugging hole of the metal ring through press fit. By using an additional metal ring in the first plug hole of the circuit board, the contact element can be easily detached from the circuit board without damaging the circuit board or the contact element.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment. Background Art

[0002] Electrical devices typically contain circuit boards and various electrical components. For the electrical devices to operate properly, these electrical components typically need to be electrically conductively connected to the circuit boards. For this purpose, contact elements are often used, one end of which is electrically conductively connected to the electrical component and the other end of which is electrically conductively connected to the circuit boards. To achieve this, conventional techniques typically provide plug holes in the circuit boards, where the crimped ends of the contact elements are directly inserted into the plug holes in the circuit boards via a press fit.

[0003] However, during the development of such electrical devices, extensive mechanical, hardware, or software testing is often required, which necessitates frequent disassembly of components within the device. Maintenance of the device also frequently requires disassembly of components. Due to the interference fit between the crimped ends of the contact elements and the receptacles of the circuit board in the prior art, it is often difficult to remove the contact elements from the circuit board without damaging the circuit board or the contact elements, resulting in significant effort and high costs. Utility Model Content

[0004] The present application provides an electrical device comprising: a housing; an electrical component disposed within the housing; a circuit board disposed within the housing; and a conductive contact element, wherein the contact element comprises a main body, a first connection portion located on one side of the main body, and a second connection portion located on the other side of the main body, the contact element being conductively connected to the electrical component via the first connection portion and conductively connected to the circuit board via the second connection portion. The circuit board has a first insertion hole, into which a metal ring is inserted by press-fitting, and a second insertion hole, into which the second connection portion of the contact element is inserted by press-fitting.

[0005] By using an additional metal ring in the first plug-in hole of the circuit board, the contact element can be removed from the circuit board without damaging the circuit board. To remove the contact element from the circuit board, the metal ring can first be pushed out of the first plug-in hole of the circuit board from the side of the circuit board facing away from the electrical component. The circuit board can then be easily removed from the second connection portion of the contact element because there is no direct contact between the first plug-in hole of the circuit board and the second connection portion of the contact element. Because the metal ring has a smooth outer circumference, it can be relatively easily pushed out of the first plug-in hole of the circuit board without damaging the circuit board.

[0006] Optionally, the metal ring includes a first section having a first diameter and a second section having a second diameter greater than the first diameter, wherein the first section is inserted into the first insertion hole of the circuit board by a press fit, and the second section abuts against a surface of the circuit board facing the electrical component. The second section having the larger second diameter can, on the one hand, limit the insertion depth of the metal ring into the first insertion hole of the circuit board, and, on the other hand, prevent the metal ring from being squeezed out of the first insertion hole of the circuit board during insertion of the second connecting portion of the contact element into the first insertion hole of the circuit board.

[0007] Optionally, the outer circumferential surface of the second section has a first reference surface for determining the angular position of the metal ring relative to the contact element. This ensures a secure press fit between the second connecting portion of the contact element and the second insertion hole of the metal ring during assembly, and allows the metal ring to be easily removed from the second connecting portion of the contact element during disassembly.

[0008] Optionally, the outer circumference of the section of the metal ring that is inserted into the first insertion hole has a second reference surface, and the first insertion hole of the circuit board has a mating surface that matches the second reference surface, which is used to determine the angular position of the metal ring relative to the circuit board and relative to the contact element. This allows the metal ring to be inserted into the first insertion hole of the circuit board at a predetermined relative angular position, preventing the metal ring from rotating within the first insertion hole of the circuit board. Furthermore, a secure press fit between the second connecting portion of the contact element and the second insertion hole of the metal ring can be ensured during assembly.

[0009] Optionally, when the metal ring includes a first section and a second section as described above, the second reference surface is provided on the first section. Optionally, the second reference surface is provided on the first section of the metal ring, while the first reference surface is provided on the second section of the metal ring. Alternatively, however, the second reference surface may be provided only on the first section of the metal ring, without providing the first reference surface on the second section of the metal ring.

[0010] Optionally, the metal ring is interrupted in the circumferential direction by a slit extending radially outward from the second insertion hole through the metal ring wall, wherein the width of the slit is less than the maximum width of the second connection portion of the contact element and greater than the maximum thickness of the second connection portion of the contact element. Thus, after the metal ring is pushed out of the first insertion hole of the circuit board, it can be easily removed from the second connection portion of the contact element through the slit by rotating the metal ring relative to the second connection portion of the contact element.

[0011] Alternatively, the metal ring is closed along the circumferential direction, and the second insertion hole has a smaller first diameter and a larger second diameter. The first diameter matches the maximum width of the second connecting portion of the contact element to achieve a press fit between the second insertion hole and the second connecting portion, and the second diameter is larger than the maximum width of the second connecting portion of the contact element. Thus, after the metal ring is pushed out of the first insertion hole of the circuit board, the width direction of the second connecting portion of the contact element can be aligned with the direction of the second diameter by rotating the metal ring relative to the second connecting portion of the contact element, and the metal ring can then be easily removed from the second connecting portion of the contact element.

[0012] Optionally, the second connecting portion has a maximum width in a region where it is press-fitted with the second plug hole, and has a decreasing width in regions on both sides of the maximum width along the longitudinal direction of the second connecting portion. Thus, after the metal ring is pushed out of the first plug hole of the circuit board, it can slide into the region of the second connecting portion where the width is smaller, thereby loosening the press-fit between the second connecting portion and the second plug hole. This allows the metal ring to be easily rotated relative to the second connecting portion of the contact element without damaging the contact element.

[0013] Optionally, the housing comprises: a fixing seat in which the electrical component is snapped; and a guide seat having a guide groove, wherein, in an assembled state, the contact terminal of the electrical component extends through a side wall of the guide seat into the guide groove, and the first connecting portion of the contact element is configured in a fork shape and inserted into the guide groove, so that the contact terminal snaps into the first connecting portion and is electrically connected to the first connecting portion. This allows for easy and reliable electrically conductive connection between the contact element and the electrical component.

[0014] Optionally, the fixing seat and the guide seat are integrally constructed with the housing, thereby simplifying the manufacture of the electrical equipment of the housing and reducing manufacturing costs.

[0015] Optionally, the electrical device is an airbag controller, and the electrical component is a capacitor for providing energy for airbag ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following will further describe the embodiments of the present application in conjunction with the accompanying drawings, but those skilled in the art will appreciate that these drawings are only for the purpose of explaining the embodiments and should not be used to limit the scope of the present application.

[0017] Figure 1 is a perspective view of an electrical device according to one embodiment of the present application;

[0018] Figure 2 yes Figure 1 An exploded view of the electrical equipment shown;

[0019] Figure 3 yes Figure 1 a perspective view of a portion of the illustrated electrical device;

[0020] Figure 4 yes Figure 1 A partial enlarged view of the assembly of electrical components of the electrical device in the housing is shown;

[0021] Figure 5 yes Figure 1 An enlarged partial view of the conductive connection between the contact element of the electrical device and the electrical component shown;

[0022] Figure 6 is a perspective view of an electrical device according to one embodiment of the present application after a circuit board is assembled;

[0023] Figure 7 is a schematic diagram of the assembly of a contact element and a circuit board of an electrical device according to an embodiment of the present application;

[0024] Figure 8is a schematic diagram of the assembly of a contact element and a circuit board of an electrical device according to an embodiment of the present application;

[0025] Figure 9 is a schematic diagram of assembling a contact element and a metal ring of an electrical device according to an embodiment of the present application;

[0026] Figure 10 is a perspective view of a metal ring of an electrical device according to one embodiment of the present application;

[0027] Figure 11 is a schematic diagram of disassembly of a contact element and a circuit board of an electrical device according to an embodiment of the present application;

[0028] Figure 12 is a schematic diagram of disassembling a contact element and a metal ring of an electrical device according to an embodiment of the present application;

[0029] Figure 13 is a perspective view of a metal ring of an electrical device according to one embodiment of the present application;

[0030] Figure 14 is a schematic diagram of assembling a contact element and a metal ring of an electrical device according to an embodiment of the present application;

[0031] Figure 15 It is a schematic diagram of disassembling a contact element and a metal ring of an electrical device according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] Figure 1 A perspective view of an electrical device 100 according to an embodiment of the present application is schematically shown. Figure 2 Shown Figure 1 The exploded view of the electrical device 100 is shown. Figure 1 and 2 It can be seen that the electrical device 100 has a housing 10. Figure 1 and Figure 2 In the embodiment shown, the housing 10 comprises two parts, namely a body 11 and a bottom plate 12. Figure 2 As can be seen from the exploded view of the electrical device 100, the electrical device 100 further includes an electrical component 20 and a circuit board 30 disposed within the housing 10. After the electrical component 20 and the circuit board 30 are assembled into the body 11 of the housing 10, the body 11 can be sealed with the base plate 12. For example, threaded fasteners can be used to fasten the base plate 12 to the body 11.

[0033] Here, the electrical device 100 may be an airbag controller, and the electrical component 20 may be a capacitor for providing energy for airbag ignition. However, it should be noted that the electrical device 100 of the present application is not limited to an airbag controller, and the electrical component 20 is not limited to a capacitor for providing energy for airbag ignition.

[0034] Figure 3 Shown Figure 1 A perspective view of a portion of an electrical device 100 is shown. This more clearly illustrates how the electrical component 20 is arranged in the housing 10 , in particular in the body 11 of the housing 10 .

[0035] from Figure 3 It can be clearly seen in the figure that the housing 10, here the body 11 of the housing 10, has a fixing seat 13, and the electrical component 20 can be snapped into the fixing seat 13. As a result, the electrical component 20 can be easily assembled in the body 11 of the housing 10.

[0036] In addition, a guide seat 14 is provided in the housing 10, in this case, the body 11 of the housing 10, and the guide seat 14 has a guide groove 15. In the assembled state, that is, when the electrical component 20 is snapped into the fixing seat 13, the contact terminal 21 of the electrical component 20 passes through the side wall of the guide seat 14 and extends into the guide groove 15. Figure 3 It can be clearly seen that two guide seats 14 are provided, each guide seat 14 corresponding to a contact terminal 21 of the electrical component 20. Of course, depending on the number of contact terminals 21 of the electrical component 20 and the number of electrical components 20, a corresponding number of guide seats 14 and guide grooves 15 can also be provided.

[0037] Figure 4 Shown Figure 1 The enlarged partial view of the assembly of the electrical component 20 of the electrical device 100 in the housing 10 shows more clearly the positional relationship between the contact terminal 21 of the electrical component 20 and the guide seat 14 and its guide groove 15. Here, the contact terminal 21 not only extends into the guide groove 15, but also crosses the entire guide seat 14. Figure 4It can also be seen that the two contact terminals 21 of the electrical component 20 have different lengths, thereby allowing the two guide seats 14 to be arranged in a staggered manner. This is advantageous when the electrical component 20 is relatively small, as it can prevent the two guide seats 14 from interfering with each other. However, this is not necessary. In particular, when the electrical component 20 is of sufficiently large size or the two contact terminals 21 are spaced sufficiently apart, the two contact terminals 21 can have the same length, in which case the two guide seats 14 can be arranged side by side. It is also conceivable to provide only a single guide seat 14 for each electrical component 20, and to provide a corresponding number of guide slots 15 in this single guide seat 14.

[0038] In the embodiment shown, the fixing seat 13 and the guide seat 14 are integrally formed with the housing 10, here with the body 11 of the housing 10. Alternatively, however, the fixing seat 13 and the guide seat 14 can also be manufactured separately and the prefabricated fixing seat 13 and guide seat 14 can be fixed in the housing 10.

[0039] Figure 5 Shown Figure 1 The electrical device 100 is shown in a partially enlarged view of the conductive connection between the contact element 40 and the electrical component 20. Figure 5 It can be seen that the conductive contact element 40 has a main body 41, a first connecting part 42 located on one side of the main body 41 and a second connecting part 43 located on the other side of the main body 41. The contact element 40 can be conductively connected to the electrical element 20 via the first connecting part 42 and can be conductively connected to the circuit board 30 via the second connecting part 43. Figure 5 It is schematically shown how the first connection 42 of the contact element 40 is electrically conductively connected to the electrical component 20 .

[0040] from Figure 5 It can be clearly seen that the first connection portion 42 of the contact element 40 is configured in a fork shape and can be inserted into the guide groove 15 of the guide seat 14. By inserting the first connection portion 42 of the contact element 40 into the guide groove 15 of the guide seat 14, the contact terminal 21 of the electrical component 20 can be snapped into the fork-shaped first connection portion 42 of the contact element 40, thereby achieving an electrically conductive connection between the contact element 40 and the electrical component 20.

[0041] Figure 6 FIG1 shows a perspective view of an electrical device 100 according to an embodiment of the present application after the circuit board 30 is assembled. The circuit board 30 is assembled but the base plate 12 has not yet been installed. It can be seen that the circuit board 30 has two first plug holes 31, each of which corresponds to a contact element 40. Figure 6 It can be clearly seen in FIG. 1 that the second connection portion 43 of each contact element 40 is inserted into the corresponding first plug-in hole 31 in the circuit board 30 .

[0042] Figure 7 A schematic diagram of the assembly of a contact element 40 and a circuit board 30 of an electrical device 100 according to one embodiment of the present application is shown. Here, the second connection portion 43 of the contact element 40 is directly plugged into the first plug hole 31 of the circuit board 30. Here, the second connection portion 43 of the contact element 40 is plugged into the first plug hole 31 of the circuit board 30 by press-fitting.

[0043] Figure 8 FIG2 shows a schematic diagram of the assembly of the contact element 40 and the circuit board 30 of the electrical device 100 according to an embodiment of the present application. It can be clearly seen that the second connection portion 43 of the contact element 40 is not directly plugged into the first plug hole 31 of the circuit board 30. Instead, the metal ring 50 is plugged into the first plug hole 31 of the circuit board 30 by press-fitting. Here, the metal ring 50 has a second plug hole 51 (see FIG2 ). Figure 10 ), the second connecting portion 43 of the contact element 40 is inserted into the second plug-in hole 51 of the metal ring 50 by press-fitting.

[0044] Figure 9 FIG2 shows a schematic diagram of the assembly of the contact element 40 and the metal ring 50 of the electrical device 100 according to an embodiment of the present application. It can be clearly seen that the second connecting portion 43 of the contact element 40 is inserted into the second plug hole 51 of the metal ring 50 by press-fitting.

[0045] It should be noted that the metal ring 50 may be, for example, a copper ring. However, any other metal with good electrical conductivity may also be used to manufacture the metal ring 50.

[0046] Back again Figure 8 ,exist Figure 8 In the embodiment shown, the metal ring 50 includes a first section having a first diameter and a second section having a second diameter larger than the first diameter, wherein the first section is inserted into the first insertion hole 31 of the circuit board 30 by press-fitting and the second section is abutted against the side of the circuit board 30 facing the electrical component 20 (at Figure 8 on the surface of (not shown).

[0047] Figure 10 FIG. 1 shows a perspective view of a metal ring 50 of an electric device 100 according to an embodiment of the present application. Figure 10It can be clearly seen that the metal ring 50 includes a first section with a first diameter and a second section with a second diameter larger than the first diameter. In addition, the metal ring 50 has a second plug hole 51. Figure 10 In the illustrated embodiment, the second insertion hole 51 has a circular cross-section. The metal ring 50 is interrupted circumferentially by a slit 52 extending radially outward from the second insertion hole 51 through the wall of the metal ring 50. The width of the slit 52 is smaller than the maximum width of the second connecting portion 43 of the contact element 40 and greater than the maximum thickness of the second connecting portion 43 of the contact element 40. The slit 52 facilitates removal of the metal ring 50 from the contact element 40 during disassembly.

[0048] exist Figure 10 In the embodiment shown, the outer circumference of the second section of the metal ring 50 has a first reference surface 53, where the first reference surface 53 can be configured as a plane and perpendicular to the extension direction of the gap 52, for example. This makes it easy to determine the angular position of the metal ring 50 relative to the contact element 40. However, as an alternative, the outer circumference of the section of the metal ring 50 inserted into the first plug hole 31 can have a second reference surface (not shown) and the first plug hole 31 of the circuit board 30 can have a mating surface (not shown) that matches the second reference surface. That is, in Figure 10 In the illustrated metal ring 50, the second reference surface may be provided on the outer circumferential surface of the first section of the metal ring 50 having a smaller diameter (not shown), and is used to determine the angular position of the metal ring 50 relative to the circuit board 30 and the contact element 40. This allows the metal ring 50 to be inserted into the first insertion hole 31 of the circuit board 30 at a predetermined relative angular position, while preventing the metal ring 50 from rotating within the first insertion hole 31 of the circuit board 30. Furthermore, a reliable press fit can be ensured between the second connecting portion 43 of the contact element 40 and the second insertion hole 51 of the metal ring 50 during assembly.

[0049] Figure 11A schematic diagram illustrating the disassembly of a contact element 40 and a circuit board 30 of an electrical device 100 according to one embodiment of the present application is shown. To remove the circuit board 30 from the contact element 40, the metal ring 50 is first pressed from the side of the circuit board 30 facing away from the electrical component 20 (not shown) toward the side of the circuit board 30 facing the electrical component 20, thereby allowing the metal ring 50 to slide out of the first insertion hole 31 of the circuit board 30. At this point, there is no longer any contact between the first insertion hole 31 of the circuit board 30, the metal ring 50, and the contact element 40, making it easy to remove the circuit board 30 from the contact element 40.

[0050] Figure 12 FIG. 1 shows a schematic diagram of disassembling the contact element 40 and the metal ring 50 of the electrical device 100 according to an embodiment of the present application. Figure 11 Starting from the state shown, the metal ring 50 is rotated relative to the contact element 40 so that the extending direction of the slit 52 of the metal ring 50 is consistent with the width direction of the second connecting portion 43 of the contact element 40 ( Figure 12 Since the maximum thickness of the contact element 40 is smaller than the width of the slit 52 , the metal ring 50 can be easily removed from the second connecting portion 43 of the contact element 40 .

[0051] Back to Figure 11 The second connecting portion 43 of the contact element 40 has a maximum width in the area where it is press-fitted with the second insertion hole 51, and has a decreasing width in areas on both sides of the maximum width along the longitudinal direction of the second connecting portion 43. Therefore, after the metal ring 50 is pushed out of the first insertion hole 31 of the circuit board 30, it can slide into the area of the second connecting portion 43 where the width is smaller, thereby loosening the press-fit between the second connecting portion 43 and the second insertion hole 51. This allows the metal ring 50 to be easily rotated relative to the second connecting portion 43 of the contact element 40 without damaging the contact element 40.

[0052] Figure 13 FIG. 1 shows a perspective view of a metal ring 50 of an electric device 100 according to an embodiment of the present application. Figure 13In the illustrated embodiment, the metal ring 50 is closed along the circumferential direction. Furthermore, the cross-section of the second insertion hole 51 of the metal ring 50 is not circular, but rather has a smaller first diameter and a larger second diameter. The first diameter matches the maximum width of the second connecting portion 43 of the contact element 40 to achieve a press fit between the second insertion hole 51 and the second connecting portion 43, and the second diameter is greater than the maximum width of the second connecting portion 43 of the contact element 40. As a result, the metal ring 50 can be easily removed from the second connecting portion 43 of the contact element 40 without providing a slit 52 in the metal ring 50.

[0053] Figure 14 The schematic diagram of the assembly of the contact element 40 and the metal ring 50 of the electrical device 100 according to one embodiment of the present application is shown. Figure 13 The metal ring 50 shown in FIG. Figure 14 In the state shown, the width direction of the second connecting portion 43 of the contact element 40 is consistent with the direction of the first diameter of the second insertion hole 51 of the metal ring 50. As a result, the second connecting portion 43 of the contact element 40 can be reliably inserted into the second insertion hole 51 of the metal ring 50 by press-fitting.

[0054] Figure 15 A schematic diagram illustrates the disassembly of the contact element 40 and metal ring 50 of an electrical device 100 according to one embodiment of the present application. During disassembly, after the metal ring 50 is pushed out of the first insertion hole 31 of the circuit board 30, the metal ring 50 is rotated relative to the contact element 40 so that the width of the second connecting portion 43 of the contact element 40 aligns with the second diameter of the second insertion hole 51 of the metal ring 50. This also allows for easy removal of the metal ring 50 from the second connecting portion 43 of the contact element 40.

[0055] The above are merely exemplary embodiments of the present application. The scope of protection of the present application is not limited to the above embodiments. All technical solutions within the scope of protection of the present application are within the scope of protection of the present application. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present application should also be considered within the scope of protection of the present application.

Claims

1. An electrical device (100), comprising: Housing (10); an electrical component (20) disposed within the housing (10); a circuit board (30) disposed within the housing (10); as well as A conductive contact element (40), wherein the contact element (40) has a main body (41), a first connection portion (42) located on one side of the main body (41), and a second connection portion (43) located on the other side of the main body (41); the contact element (40) is conductively connected to the electrical component (20) via the first connection portion (42) and is conductively connected to the circuit board (30) via the second connection portion (43). It is characterized by: The circuit board (30) has a first plug-in hole (31), a metal ring (50) is inserted into the first plug-in hole (31) of the circuit board (30) by press-fitting, and has a second plug-in hole (51), and the second connecting portion (43) of the contact element (40) is inserted into the second plug-in hole (51) of the metal ring (50) by press-fitting.

2. The electrical device (100) according to claim 1, characterized in that The metal ring (50) includes a first section having a first diameter and a second section having a second diameter larger than the first diameter, wherein the first section is inserted into a first plug hole (31) of the circuit board (30) by press-fitting and the second section is in contact with a surface of the circuit board (30) facing the electrical component (20).

3. The electrical device (100) according to claim 2, characterized in that The outer circumference of the second section has a first reference surface (53) for determining the angular position of the metal ring (50) relative to the contact element (40).

4. The electrical device (100) according to claim 1, characterized in that The outer peripheral surface of the section of the metal ring (50) inserted into the first plug hole (31) has a second reference surface, and the first plug hole (31) of the circuit board (30) has a matching surface matching the second reference surface, for determining the angular position of the metal ring (50) relative to the circuit board (30) and relative to the contact element (40).

5. The electrical device (100) according to claim 1, characterized in that The metal ring (50) is interrupted in the circumferential direction by a gap (52) extending radially outward from the second plug hole (51) and penetrating the wall of the metal ring (50), wherein the width of the gap (52) is smaller than the maximum width of the second connecting portion (43) of the contact element (40) and larger than the maximum thickness of the second connecting portion (43) of the contact element (40).

6. The electrical device (100) according to claim 1, characterized in that The metal ring (50) is closed in the circumferential direction and the second plug hole (51) has a smaller first diameter and a larger second diameter, the first diameter matches the maximum width of the second connecting portion (43) of the contact element (40) to achieve a press fit between the second plug hole (51) and the second connecting portion (43), and the second diameter is larger than the maximum width of the second connecting portion (43) of the contact element (40).

7. The electrical device (100) according to claim 1, characterized in that The second connection portion (43) has a maximum width in a region press-fitted with the second insertion hole (51) and has a reduced width in regions on both sides of the maximum width along the longitudinal direction of the second connection portion (43).

8. The electrical device (100) according to claim 1, characterized in that The housing (10) has: A fixing seat (13), wherein the electrical component (20) is snapped into the fixing seat (13); and A guide seat (14), wherein the guide seat (14) has a guide groove (15), In the assembled state, the contact terminal (21) of the electrical component (20) extends through the side wall of the guide seat (14) into the guide groove (15), and the first connecting portion (42) of the contact element (40) is configured in a fork shape and inserted into the guide groove (15), so that the contact terminal (21) is snapped into the first connecting portion (42) and is conductively connected to the first connecting portion (42).

9. The electrical device (100) according to claim 8, characterized in that The fixing seat (13) and the guide seat (14) are integrally constructed with the housing (10).

10. The electrical device (100) according to any one of claims 1 to 9, characterized in that The electric device (100) is an airbag controller, and the electric component (20) is a capacitor for providing energy for firing the airbag.

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