Relay static contact assembly and relay

Abstract

The utility model discloses a relay static contact assembly and a relay. The relay static contact assembly comprises a static contact and a radiator. The static contact comprises a static terminal and a static contact fixed on the static terminal. The heat sink includes: a fixed portion fixed to the static terminal and in thermal contact with the static contact; the heat dissipation part comprises a substrate and a plurality of heat dissipation fins formed on the substrate; and a connection portion connected between the fixing portion and the substrate of the heat dissipation portion. When the relay static contact assembly is assembled to a shell of a relay, the fixing part is located in the shell, the connecting part penetrates through the side wall of the shell, and the heat dissipation part is located outside the shell. In the utility model, the radiator and the static terminal are molded separately, and the manufacturing process is simple. The radiator is in direct thermal contact with the heating static terminal and the static contact, the heat conduction path is short, and the heat dissipation effect is good. The connecting part between the radiator and the static terminal is located in the shell of the relay, and the connecting part is not prone to being affected by the external environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of relay static contact components and the relay including the relay static contact component of this. BACKGROUND

[0002] In prior art, one of the components that generates heat in the application process of electromagnetic relay is static contact, and the heat of static contact is relatively high under the condition of large load current. In addition, a lead-out pin is arranged on the static contact, and the lead-out pin is generally welded on the PCB, and the heat is also relatively high. In order to solve the heat dissipation problem of the static contact and the lead-out pin thereof, a heat dissipation structure is generally integrally formed on the static contact in prior art. However, this scheme has the following disadvantages: the heat dissipation structure is integrally formed with the static contact, which leads to complex manufacturing process and limited material of the heat dissipation structure; when the heat dissipation structure needs to lead out the outside of the relay, the shell of the relay needs to be improved accordingly, which not only increases the process difficulty, but also damages the integrity of the shell. SUMMARY

[0003] The utility model aims to solve at least one aspect of the above problems and defects in prior art.

[0004] According to one aspect of the utility model, a relay static contact assembly is provided. The relay static contact assembly includes a static contact and a heat sink. The static contact includes a static terminal and a static contact point fixed to the static terminal. The heat sink includes a fixing portion fixed to the static terminal and in thermal contact with the static contact point, a heat dissipation portion including a substrate and a plurality of heat dissipation fins formed on the substrate, and a connecting portion connected between the fixing portion and the substrate of the heat dissipation portion. When the relay static contact assembly is assembled to the shell of the relay, the fixing portion is located inside the shell, the connecting portion passes through the side wall of the shell, and the heat dissipation portion is located outside the shell.

[0005] According to one exemplary embodiment of the utility model, the fixing portion of the heat sink and the static terminal are vertically plate-shaped, and the fixing portion is attached to the back surface of the static terminal and the static contact point to be in thermal contact with the static terminal and the static contact point at the same time.

[0006] According to another exemplary embodiment of the utility model, the static contact point protrudes from the front surface of the static terminal to be in electrical contact with the movable contact point on the movable contact of the relay.

[0007] According to another exemplary embodiment of the utility model, the static terminal has an upper portion and a lower portion opposite in the vertical direction, and the fixing portion and the static contact point are fixed to the upper portion of the static terminal; when the relay static contact assembly is assembled to the shell, the lower portion of the static terminal passes through the bottom wall of the shell to be welded to the circuit board.

[0008] According to another exemplary embodiment of the present application, the fixing portion is crimped, welded, riveted, screwed or clamped to the static terminal.

[0009] According to another exemplary embodiment of the present application, the relay static contact assembly further comprises a rivet passing through and riveting the fixing portion and the static terminal together.

[0010] According to another exemplary embodiment of the present application, the base plate is vertically plate-shaped, and the plurality of heat dissipation fins are vertically formed on the front face of the base plate and distributed in an array.

[0011] According to another exemplary embodiment of the present application, a horizontally extending protrusion is formed on the back face of the upper end and the lower end of the base plate respectively, and the protrusion is adapted to abut on the outside of the side wall of the housing for positioning and supporting the base plate so that the base plate is in a vertical state and spaced apart from the side wall of the housing by a predetermined gap.

[0012] According to another exemplary embodiment of the present application, the connecting portion is in a horizontally extending or vertically extending rib shape.

[0013] According to another exemplary embodiment of the present application, the heat sink is an integrally formed piece.

[0014] According to another exemplary embodiment of the present application, the static terminal is an integrally formed copper piece, and the heat sink is an integrally formed aluminum piece.

[0015] According to another aspect of the present application, a relay is provided. The relay comprises: a housing; and the aforementioned relay static contact assembly mounted to the housing. The static contact is mounted in the housing, the fixing portion of the heat sink is located inside the housing, the connecting portion of the heat sink passes through the side wall of the housing, and the heat dissipation portion of the heat sink is located outside the housing.

[0016] According to an exemplary embodiment of the present application, the relay comprises two relay static contact assemblies mounted side by side to the housing.

[0017] According to another exemplary embodiment of the present application, the relay further comprises: a moving contact disposed in the housing, comprising a moving terminal and two moving contact points fixed to the moving terminal, the moving contact being movable between a closed position in which the moving contact points are in electrical contact with the static contact points and an open position in which the moving contact points are electrically separated from the static contact points.

[0018] According to another exemplary embodiment of the present application, a protrusion is formed on the sidewall of one of the upper housing and the lower housing, and a clamping groove is formed on the sidewall of the other one, the protrusion and the clamping groove being engaged to fix the upper housing and the lower housing together.

[0019] According to another exemplary embodiment of the present application, a notch is formed on the lower edge of the sidewall of the upper housing and / or the upper edge of the sidewall of the lower housing, allowing the connecting portion of the heat sink to pass through.

[0020] According to another exemplary embodiment of the present application, a slot hole is formed on the bottom wall of the lower housing, allowing the lower portion of the static terminal to pass through, the lower portion of the static terminal extending out of the housing via the slot hole for soldering to a circuit board.

[0021] According to another exemplary embodiment of the present application, the lower housing has a partition wall connected to the bottom wall and the sidewall thereof, the partition wall dividing the internal space of the housing into an arc-extinguishing chamber and a containing chamber; the static contact and the movable contact are located in the arc-extinguishing chamber of the housing, and the relay further comprises an electromagnetic driving assembly installed in the containing chamber of the housing.

[0022] In the foregoing exemplary embodiments of the present application, the heat sink and the static terminal are separately formed, and the manufacturing process is simple. In addition, in the present application, the heat sink is in direct thermal contact with the heat-generating static terminal and static contact, the thermal conduction path is short, and the heat dissipation effect is good. The connecting portion between the heat sink and the static terminal is located inside the housing of the relay, and the connecting portion is not easily affected by the external environment.

[0023] In addition, in the foregoing exemplary embodiments of the present application, the thermal contact area between the heat sink and the static terminal is large, the thermal conduction effect is good, and the heat dissipation performance is further improved.

[0024] Other objects and advantages of the present application will be apparent to those skilled in the art from the following description of the application, when considered in connection with the accompanying drawings, and will help to understand the present application comprehensively. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 shows a perspective view of a relay static contact assembly according to an exemplary embodiment of the present application;

[0026] Figure 2 FIG. 2 shows an exploded view of a relay static contact assembly according to an exemplary embodiment of the present application;

[0027] Figure 3shows a cross-sectional view of a relay static contact assembly according to an exemplary embodiment of the present application;

[0028] Figure 4 shows another cross-sectional view of a relay static contact assembly according to an exemplary embodiment of the present application;

[0029] Figure 5 shows a plan cross-sectional view of a relay static contact assembly according to an exemplary embodiment of the present application;

[0030] Figure 6 shows a perspective view of a relay according to an exemplary embodiment of the present application;

[0031] Figure 7 shows a longitudinal cross-sectional view of a relay according to an exemplary embodiment of the present application;

[0032] Figure 8 shows a transversal cross-sectional view of a relay according to an exemplary embodiment of the present application;

[0033] Figure 9 shows a transversal cross-sectional view of a relay according to an exemplary embodiment of the present application, wherein the upper housing is not shown;

[0034] Figure 10 shows a perspective view of a housing of a relay according to an exemplary embodiment of the present application;

[0035] Figure 11 shows a longitudinal cross-sectional view of a housing of a relay according to an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be further described in detail below with reference to the embodiments and in conjunction with the drawings. In the description, identical or similar reference numerals indicate identical or similar components. The following description of the embodiments of the present application with reference to the drawings is intended to explain the general inventive concept of the present application and should not be understood as a limitation of the present application.

[0037] In addition, in the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that one or more embodiments of the present application can be practiced without these specific details. In other instances, well-known structures and devices are not described in detail in order to simplify the drawings.

[0038] According to one general technical concept of the present application, a relay static contact assembly is provided. The relay static contact assembly includes a static contact and a heat sink. The static contact includes a static terminal and a static contact point fixed to the static terminal. The heat sink includes: a fixed portion fixed to the static terminal and in thermal contact with the static contact point; a heat dissipation portion including a substrate and a plurality of heat dissipation fins formed on the substrate; and a connecting portion connected between the fixed portion and the substrate of the heat dissipation portion. When the relay static contact assembly is assembled to a housing of a relay, the fixed portion is located inside the housing, the connecting portion passes through a sidewall of the housing, and the heat dissipation portion is located outside the housing.

[0039] According to another general technical concept of the present application, a relay is provided. The relay includes: a housing; and the aforementioned relay static contact assembly mounted to the housing. The static contact is mounted in the housing, the fixed portion of the heat sink is located inside the housing, the connecting portion of the heat sink passes through a sidewall of the housing, and the heat dissipation portion of the heat sink is located outside the housing.

[0040] Figure 1 A perspective view of the relay static contact assembly 100 according to one exemplary embodiment of the present application is shown; Figure 2 An exploded view of the relay static contact assembly 100 according to one exemplary embodiment of the present application is shown; Figure 3 A cross-sectional view of the relay static contact assembly 100 according to one exemplary embodiment of the present application is shown;

[0041] Figure 4 Another cross-sectional view of the relay static contact assembly 100 according to one exemplary embodiment of the present application is shown; Figure 5 A planar cross-sectional view of the relay static contact assembly 100 according to one exemplary embodiment of the present application is shown; Figure 6 A perspective view of the relay according to one exemplary embodiment of the present application is shown; Figure 7 A longitudinal cross-sectional view of the relay according to one exemplary embodiment of the present application is shown; Figure 8 A transverse cross-sectional view of the relay according to one exemplary embodiment of the present application is shown; Figure 9 A transverse cross-sectional view of the relay according to one exemplary embodiment of the present application is shown, wherein the upper housing 31 is not shown; Figure 10 A perspective view of the housing 3 of the relay according to one exemplary embodiment of the present application is shown; Figure 11 A longitudinal cross-sectional view of the housing 3 of the relay according to one exemplary embodiment of the present application is shown.

[0042] As Figures 1 to 11As shown, in an exemplary embodiment of this utility model, a relay stationary contact assembly 100 is disclosed. The relay stationary contact assembly 100 includes a stationary contact 1 and a heat sink 2. The stationary contact 1 includes a stationary terminal 10 and a stationary contact 11 fixed to the stationary terminal 10. The heat sink 2 includes a fixing portion 20, a heat dissipation portion 21, and a connecting portion 22. The fixing portion 20 is fixed to the stationary terminal 10 and in thermal contact with the stationary contact 11. The heat dissipation portion 21 includes a substrate 211 and a plurality of heat dissipation fins 212 formed on the substrate 211. The connecting portion 22 connects the fixing portion 20 and the substrate 211 of the heat dissipation portion 21. When the relay stationary contact assembly 100 is assembled into a relay housing 3, the fixing portion 20 is located inside the housing 3, the connecting portion 22 passes through the side wall of the housing 3, and the heat dissipation portion 21 is located outside the housing 3.

[0043] like Figures 1 to 11 As shown in the illustrated embodiment, the fixing part 20 and the stationary terminal 10 of the heat sink 2 are in the shape of vertical plates. The fixing part 20 abuts against the back of the stationary terminal 10 and the stationary contact 11 so as to make thermal contact with the stationary terminal 10 and the stationary contact 11 simultaneously. In this way, the thermal contact area between the heat sink 2 and the stationary contact 1 can be increased, thereby improving the heat dissipation effect.

[0044] like Figures 1 to 11 As shown, in the illustrated embodiment, the stationary contact 11 protrudes 3a from the front of the stationary terminal 10 for electrical contact with the moving contact on the moving contact of the relay.

[0045] like Figures 1 to 11 As shown in the illustrated embodiment, the stationary terminal 10 has an upper and a lower portion opposite each other in the vertical direction, and the fixing portion 20 and the stationary contact 11 are fixed to the upper portion of the stationary terminal 10. When the relay stationary contact assembly is assembled to the housing 3, the lower portion of the stationary terminal 10 passes through the bottom wall of the housing 3 for soldering to the circuit board.

[0046] like Figures 1 to 11 As shown, in the illustrated embodiment, the fixing part 20 is crimped, welded, riveted, threaded, or snapped onto the stationary terminal 10.

[0047] like Figures 1 to 11 As shown, in the illustrated embodiment, the relay stationary contact assembly 100 further includes a rivet 23 that passes through the fixing portion 20 and the stationary terminal 10 and rivets the fixing portion 20 and the stationary terminal 10 together.

[0048] like Figures 1 to 11 As shown, in the illustrated embodiment, the substrate 211 is in the shape of a vertical plate, and a plurality of heat dissipation fins 212 are formed vertically on the front side of the substrate 211 and distributed in an array.

[0049] like Figures 1 to 11As shown in the illustrated embodiment, a horizontally extending protrusion is formed on the back surface of the upper end and the lower end of the substrate 211, respectively, and the protrusion is adapted to abut against the outside of the side wall of the housing 3 for positioning and supporting the substrate 211 so that the substrate 211 is in a vertical state and spaced apart from the side wall of the housing 3 by a predetermined gap. In this way, the heat dissipation effect can be improved.

[0050] As shown in the illustrated embodiment, the connecting portion 22 is in the form of a horizontally or vertically extending rib. Figures 1 to 11

[0051] As shown in the illustrated embodiment, the heat sink 2 is a one-piece member. Figures 1 to 11

[0052] As shown in the illustrated embodiment, the static terminal 1 is a one-piece copper member and the heat sink 2 is a one-piece aluminum member. Figures 1 to 11

[0053] As shown in the illustrated embodiment, in another exemplary embodiment of the present application, a relay is also disclosed. The relay comprises a housing 3 and a relay static contact assembly 100. The relay static contact assembly 100 is mounted to the housing 3. The static terminal 1 is mounted in the housing 3, the fixing portion 20 of the heat sink 2 is located inside the housing 3, the connecting portion 22 of the heat sink 2 passes through the side wall of the housing 3, and the heat dissipation portion 21 of the heat sink 2 is located outside the housing 3. Figures 1 to 11

[0054] As shown in the illustrated embodiment, the relay comprises two relay static contact assemblies 100. The two relay static contact assemblies 100 are mounted side by side to the housing 3. Figures 1 to 11

[0055] As shown in the illustrated embodiment, the relay further comprises a moving contact (not shown) disposed in the housing 3, comprising a moving terminal (not shown) and two moving contact points (not shown) fixed to the moving terminal. The moving contact is movable between a closed position in which the moving contact points are in electrical contact with the static contact points 11 and an open position in which the moving contact points are electrically separated from the static contact points 11. Figures 1 to 11

[0056] As shown in the illustrated embodiment, the housing 3 comprises an upper housing 31 and a lower housing 32 assembled together, a protrusion 3a is formed on the side wall of one of the upper housing 31 and the lower housing 32, and a clamping groove 3b is formed on the side wall of the other, the protrusion 3a and the clamping groove 3b are engaged to fix the upper housing 31 and the lower housing 32 together. Figures 1 to 11

[0057] As shown in the illustrated embodiment, in another exemplary embodiment of the present application, a relay is also disclosed. The relay comprises a housing 3 and a relay static contact assembly 100. The relay static contact assembly 100 is mounted to the housing 3. The static terminal 1 is mounted in the housing 3, the fixing portion 20 of the heat sink 2 is located inside the housing 3, the connecting portion 22 of the heat sink 2 passes through the side wall of the housing 3, and the heat dissipation portion 21 of the heat sink 2 is located outside the housing 3. Figures 1 to 11 ​​​​​​​As shown, in the illustrated embodiment, notches 3c are formed in the lower edge portion of the side wall of upper housing 31 and / or the upper edge portion of the side wall of lower housing 32, allowing the connecting portion 22 of heat sink 2 to pass through.

[0058] As shown, in the illustrated embodiment, a slot hole 3d is formed in the bottom wall of lower housing 32, allowing the lower portion of stationary terminal 10 to pass through, and the lower portion of stationary terminal 10 extends out of housing 3 via slot hole 3d for soldering to a circuit board. Figures 1 to 11

[0059] As shown, in the illustrated embodiment, lower housing 32 has a partition wall 33 connected to its bottom wall and side wall, partition wall 33 divides the internal space of housing 3 into an arc-extinguishing chamber 301 and a containing chamber 302. Stationary contact 1 and movable contact are located in arc-extinguishing chamber 301 of housing 3, and the relay further includes an electromagnetic drive assembly (not shown) mounted in containing chamber 302 of housing 3, which mainly includes a coil assembly (not shown) and a drive assembly (not shown) for driving the aforementioned movable contact to move between the closed position and the open position. Figures 1 to 11

[0060] Those skilled in the art can understand that the above-described embodiments are exemplary, and those skilled in the art can make improvements thereto, and the structures described in various embodiments can be freely combined without structural or principle conflicts, and these changes shall fall within the protection scope of the utility model.

[0061] Although the utility model has been described in conjunction with the drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate the preferred embodiments of the utility model, and cannot be understood as a limitation of the utility model.

[0062] Although some embodiments of the general concept of the utility model have been shown and described, those of ordinary skill in the art will understand that changes can be made to these embodiments without departing from the principles and spirit of the general concept of the utility model, and the scope of the utility model is limited by the claims and their equivalents.

[0063] It should be noted that the wording "comprising" does not exclude other elements or steps, and the wording "a" or "one" does not exclude a plurality. In addition, any element reference of the claims should not be understood as limiting the scope of the utility model.​​

Claims

1. A relay stationary contact assembly, characterized in that, include: The stationary contact (1) includes a stationary terminal (10) and a stationary contact (11) fixed to the stationary terminal (10); and Radiator (2), comprising: The fixing part (20) is fixed to the stationary terminal (10) and makes thermal contact with the stationary contact (11); The heat dissipation section (21) includes a substrate (211) and a plurality of heat dissipation fins (212) formed on the substrate (211); and A connecting part (22) connects the base plate (211) of the fixing part (20) and the heat dissipation part (21). When the relay stationary contact assembly is assembled into the relay housing (3), the fixing part (20) is located inside the housing (3), the connecting part (22) passes through the side wall of the housing (3), and the heat dissipation part (21) is located outside the housing (3).

2. The relay stationary contact assembly according to claim 1, characterized in that: The fixing part (20) of the heat sink (2) and the stationary terminal (10) are in the shape of a vertical plate. The fixing part (20) is attached to the back of the stationary terminal (10) and the stationary contact (11) so as to make thermal contact with the stationary terminal (10) and the stationary contact (11) at the same time.

3. The relay stationary contact assembly according to claim 2, characterized in that: The stationary contact (11) protrudes (3a) from the front of the stationary terminal (10) and is used to make electrical contact with the moving contact on the moving contact of the relay.

4. The relay stationary contact assembly according to claim 2, characterized in that: The stationary terminal (10) has an upper part and a lower part opposite to each other in the vertical direction, and the fixing part (20) and the stationary contact (11) are fixed to the upper part of the stationary terminal (10); When the relay stationary contact assembly is assembled into the housing (3), the lower part of the stationary terminal (10) passes through the bottom wall of the housing (3) for soldering onto the circuit board.

5. The relay stationary contact assembly according to claim 1, characterized in that: The fixing part (20) is crimped, welded, riveted, threaded or snapped to the stationary terminal (10).

6. The relay stationary contact assembly according to claim 1, characterized in that, Also includes: A rivet (23) passes through the fixing part (20) and the stationary terminal (10) and rivets the fixing part (20) and the stationary terminal (10) together.

7. The relay stationary contact assembly according to claim 1, characterized in that: The substrate (211) is in the shape of a vertical plate, and the plurality of heat dissipation fins (212) are formed vertically on the front side of the substrate (211) and distributed in an array.

8. The relay stationary contact assembly according to claim 7, characterized in that: A horizontally extending rib is formed on the back surface of the upper and lower ends of the substrate (211), respectively. The rib is adapted to abut against the outer side of the side wall of the housing (3) for positioning and supporting the substrate (211), so that the substrate (211) is in a vertical state and is spaced apart from the side wall of the housing (3) by a predetermined gap.

9. The relay stationary contact assembly according to claim 1, characterized in that: The connecting part (22) is in the form of a rib extending horizontally or vertically.

10. The relay stationary contact assembly according to claim 1, characterized in that: The radiator (2) is a one-piece molded part.

11. The relay stationary contact assembly according to claim 1, characterized in that: The stationary terminal (1) is an integral copper component, and the heat sink (2) is an integral aluminum component.

12. A relay, characterized in that, include: Shell (3); and The relay stationary contact assembly (100) according to any one of claims 1-11 is mounted to the housing (3). The stationary contact (1) is installed in the housing (3), the fixing part (20) of the radiator (2) is located inside the housing (3), the connecting part (22) of the radiator (2) passes through the side wall of the housing (3), and the heat dissipation part (21) of the radiator (2) is located outside the housing (3).

13. The relay according to claim 12, characterized in that: The relay includes two relay stationary contact assemblies (100) which are mounted side by side to the housing (3).

14. The relay according to claim 13, characterized in that, Also includes: The moving contact, disposed in the housing (3), includes a moving terminal and two moving contacts fixed to the moving terminal. The moving contact is movable between a closed position where the moving contact is electrically in contact with the stationary contact (11) and an open position where the moving contact is electrically separated from the stationary contact (11).

15. The relay according to claim 14, characterized in that: The housing (3) includes an upper housing (31) and a lower housing (32) assembled together. A protrusion (3a) is formed on the side wall of one of the upper housing (31) and the lower housing (32), and a slot (3b) is formed on the side wall of the other. The protrusion (3a) engages with the slot (3b) to fix the upper housing (31) and the lower housing (32) together.

16. The relay according to claim 15, characterized in that: A notch (3c) is formed on the lower edge of the side wall of the upper housing (31) and / or the upper edge of the side wall of the lower housing (32) to allow the connection portion (22) of the radiator (2) to pass through.

17. The relay according to claim 15, characterized in that: A slot (3d) is formed on the bottom wall of the lower housing (32) to allow the lower part of the stationary terminal (10) to pass through, and the lower part of the stationary terminal (10) extends out of the housing (3) through the slot (3d) for soldering to a circuit board.

18. The relay according to claim 15, characterized in that: The lower housing (32) has a partition wall (33) connected to its bottom wall and side walls, the partition wall (33) dividing the internal space of the housing (3) into an arc-extinguishing chamber (301) and a receiving chamber (302); The stationary contact (1) and the moving contact are located in the arc-extinguishing chamber (301) of the housing (3), and the relay also includes an electromagnetic drive assembly installed in the receiving chamber (302) of the housing (3).

Images