Relay

Abstract

The present disclosure relates to the technical field of electronic control devices, and in particular to a relay. The relay comprises a housing, a main body assembly used for turning a load on / off, and a silencer. The silencer is located in at least part of the area between the housing and the main body assembly, and the silencer and the housing are of an integrally formed structure; the main body assembly comprises a yoke plate, and the yoke plate partitions the main body assembly into a first portion and a second portion; the silencer and the main body assembly are bonded by means of an adhesive layer. By optimizing the structure of the relay, noise transmitted from the inside of the relay to the outside can be reduced, improving the user experience.

Description

relay

[0001] This disclosure claims priority to Chinese patent application No. 202410241072.9 filed on March 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of electronic control devices, and in particular to a relay. Background Art

[0003] As a special relay, high-voltage DC relay is mainly used in electric vehicles to control the charging and discharging of batteries.

[0004] In actual use, when the coil is energized, the moving iron core rapidly attracts the yoke plate or stationary iron core. The gap between the moving iron core and the yoke plate or stationary iron core is called the magnetic gap. The smaller the magnetic gap, the greater the attraction. Throughout the power-up process, the acceleration and velocity of the moving iron core continuously increase, resulting in a large final impulse, which can cause a relatively loud "closing noise."

[0005] Before the relay opens, the contacts and core are fully closed. The large spring is compressed beyond its travel to provide contact pressure, while the small spring is also compressed to provide contact breaking force. At this point, both springs are compressed, storing their potential energy. If the relay coil is de-energized, the stored energy in the springs is converted into kinetic energy for the entire drive rod assembly, causing the relay contacts to separate. This motion is not terminated until the drive rod assembly strikes the yoke plate (or other stop). Due to the high energy content, the impact force between the drive rod assembly and the yoke plate (or other stop) is significant, resulting in a loud "release noise" from the relay during this process.

[0006] However, general cars need to take into account the low-noise driving experience of passengers, requiring the switching sound of the relay to be small enough, with the noise below 60dB, to avoid giving users a bad experience of loud noise. Summary of the Invention

[0007] An embodiment of the present disclosure provides a relay that can reduce noise transmitted from the inside of the relay to the outside by optimizing its own structure, thereby improving user experience.

[0008] An embodiment of the present disclosure provides a relay, comprising: a housing, a main body assembly for realizing load switching, and a silencer; the silencer is located in at least a portion of the area between the housing and the main body assembly, and the silencer and the housing are an integrally molded structure; the main body assembly includes a yoke plate, which separates the main body assembly into a first part and a second part; the silencer is bonded to the main body assembly by an adhesive layer.

[0009] According to some disclosed embodiments, the sound-absorbing member includes a first sound-absorbing pad located between a side of the first portion facing away from the second portion and the housing.

[0010] According to some disclosed embodiments, the housing is provided with an exposure hole;

[0011] The first part comprises a main body and a protruding part; the protruding part protrudes from the surface of the main body and is partially placed in the corresponding exposure hole.

[0012] According to some disclosed embodiments, the first sound-absorbing pad is located between the side of the shell where the exposure hole is set and the main body; the first sound-absorbing pad includes a main body, the main body is provided with an opening, and the protrusion extends into the exposure hole through the corresponding opening.

[0013] According to some disclosed embodiments, the first sound-absorbing pad further includes a first extension portion for blocking glue, wherein the first extension portion is connected to the main body portion and extends between the side wall of the exposure hole and the protrusion.

[0014] According to some disclosed embodiments, the first sound-absorbing pad forms a first glue storage space on a side facing the main body, together with the side wall of the protruding portion and the main body, and the first glue storage space is used to fill the glue layer.

[0015] According to some disclosed embodiments, the first sound-absorbing pad is provided with a guiding slope around the protrusion; and the distance between the guiding slope and the protrusion gradually decreases along the direction from the protrusion to the exposure hole.

[0016] According to some disclosed embodiments, the first sound-absorbing pad further includes a second extension portion, which is located on a side of the main body facing away from the shell where the exposure hole is provided, and the second extension portion abuts against an outer wall of the main body.

[0017] According to some disclosed embodiments, the first sound-absorbing pad is provided with an avoidance portion.

[0018] According to some disclosed embodiments, the avoidance portion is an avoidance through-hole.

[0019] According to some disclosed embodiments, the avoidance portion is a avoidance groove, and the avoidance groove is recessed from the main body portion toward a side surface of the main body portion in a direction away from the main body portion.

[0020] According to some disclosed embodiments, a protruding structure is formed on the side of the main body away from the main body at a position corresponding to the avoidance groove, and a rib is provided on the protruding structure.

[0021] According to some disclosed embodiments, it is characterized in that the first sound-absorbing pad includes a plurality of sub-gaskets, and the plurality of sub-gaskets are arranged at intervals.

[0022] According to some disclosed embodiments, the first sound-absorbing pad further includes a third extension portion, the third extension portion and the first extension portion are located on the same side of the main body portion, and the third extension portion is located on the side of the first extension portion facing away from the protruding portion, and is spaced apart from the first extension portion, and a portion of the outer shell is placed between the first extension portion and the third extension portion.

[0023] According to some disclosed embodiments, the sound-absorbing member includes a second sound-absorbing pad located between a side of the second portion facing away from the first portion and the housing.

[0024] According to some disclosed embodiments, the second sound-absorbing pad is provided with a glue storage slot for storing the glue layer.

[0025] According to some disclosed embodiments, the sound-absorbing member includes a third sound-absorbing pad located between a side wall of the shell and a side wall of the main body assembly.

[0026] According to some disclosed embodiments, at least a portion of the area between the shell and the main body component is bonded and fixed.

[0027] One embodiment disclosed above has at least the following advantages or beneficial effects:

[0028] 1. In the relay provided herein, the housing and silencer are integrally molded, reducing the number of components within the relay, eliminating glue dispensing steps, and simplifying assembly. Specifically, the housing and silencer can be integrally molded using an injection molding process. The silencer is bonded to the main assembly via an adhesive layer to effectively secure the relative position of the housing and main assembly.

[0029] It should be noted that in the relay provided herein, the silencer is fixed to both the housing and the main assembly. This reduces, or even prevents, any movement of the main assembly relative to the housing, thereby minimizing noise generated within the relay. When only an adhesive layer is provided between the housing and the main assembly, the adhesive layer may create a noise transmission path between the housing and the main assembly. In the present disclosure, the silencer is placed between the adhesive layer and the housing, located along the noise transmission path, to achieve a more effective noise reduction effect. The silencer can provide flexible damping to absorb vibrations, achieving a noise reduction effect, reducing noise transmitted from the interior of the relay to the outside, and improving the user experience.

[0030] Furthermore, because the silencer is secured to both the housing and the main assembly, this structural arrangement not only enhances the silencer's noise reduction capabilities but also improves the relay's withstand voltage insulation. Specifically, because the silencer is positioned between the housing and the main assembly, and is effectively secured to both (by gluing or integrally forming), gaps are less likely to form between the main assembly and the housing, preventing electricity from "creeping" through the gap and affecting the withstand voltage insulation performance between the main contacts.

[0031] In addition, since the silencer has a certain elasticity, it can also play a buffering role to reduce the vibration of the internal structural parts of the relay and improve the structural performance of the relay.

[0032] 2. In the relay provided by the present invention, at least part of the first extension portion is arranged between the exposed hole and the protruding portion. This structural arrangement can mainly prevent the glue layer from overflowing, play a role in blocking glue, and even play a role in insulation and voltage resistance. Specifically, when the first sound-absorbing pad is bonded to one side of the main assembly with a glue layer, the glue layer may overflow to the shell integrally formed with the first sound-absorbing pad. At the same time, the glue layer will form a solid propagation path for noise after being connected to the shell. Accordingly, by providing the first extension portion, the glue layer can be prevented from overflowing, and the formation of a solid propagation path for noise after the glue layer is connected to the shell can be avoided, thereby ensuring that the silencer effectively plays a role in buffering, sound insulation and noise reduction. At the same time, after the glue is filled between the first extension portion and the static contact, the creepage gap between the main contacts can also be increased, playing a role in insulation and voltage resistance.

[0033] 3. The relay provided by the present invention has a "glue storage" structure design for the main body component and the first silencer pad. The first glue storage space is used to fill with glue, which can ensure that the first silencer pad and the main body are connected to form an insulating wall, thereby ensuring the creepage distance here. Specifically, when glue is dispensed on the surface of the main body and the first silencer pad is assembled with the main body component, the glue can be "squeezed" into the first glue storage space. When the glue in the first glue storage space is filled in place, the glue in the first glue storage space can form an insulating wall structure to avoid creepage problems. At the same time, the first glue storage space can also improve the firmness of the bonding between the first silencer pad and the main body component to improve the stability of related structural parts in the relay.

[0034] 4. In the relay provided by the present disclosure, the first sound-absorbing pad is provided with a second glue storage space, and the second glue storage space is used to fill the plastic of the shell, which can ensure that the first sound-absorbing pad and the shell are connected to form an insulating wall, thereby ensuring the creepage distance here.

[0035] 5. In the relay provided by the present disclosure, the housing and the main assembly can be bonded and fixed in the area where the silencer is provided, or even in other areas, to further reduce or even avoid shaking of the main assembly relative to the housing, thereby further reducing the noise generated in the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is an exploded perspective view of a relay according to an embodiment of the present disclosure;

[0037] FIG2 is a schematic diagram showing the three-dimensional structure of the sealing unit in FIG1 ;

[0038] FIG3 shows a schematic cross-sectional view of the relay of FIG1 ;

[0039] FIG4 shows a cross-sectional schematic diagram of a relay in the related art;

[0040] FIG5 is a schematic cross-sectional view showing a portion of the structure in FIG3 ;

[0041] FIG6 is a schematic diagram showing the three-dimensional structure of the first type of first sound-absorbing pad in FIG1 ;

[0042] FIG7 shows a bottom view of the first sound-absorbing pad in FIG6 ;

[0043] FIG8 shows a top view of the first sound-absorbing pad in FIG6 ;

[0044] FIG9 shows a schematic cross-sectional view of the section AA in FIG8 ;

[0045] FIG10 is a cross-sectional view showing the first sound-absorbing pad in FIG6 being assembled on the surface of the main assembly;

[0046] FIG11 is a schematic diagram showing the three-dimensional structure of another sealing unit in a relay provided by an embodiment of the present disclosure;

[0047] FIG12 is a schematic diagram showing the three-dimensional structure of a second first noise-absorbing pad in a relay provided by an embodiment of the present disclosure;

[0048] FIG13 shows a bottom view of the first sound-absorbing pad in FIG12;

[0049] FIG14 shows a top view of the first sound-absorbing pad in FIG12;

[0050] FIG15 shows a schematic cross-sectional view at BB in FIG14 ;

[0051] FIG16 is a schematic diagram showing the three-dimensional structure of a third first noise-absorbing pad in a relay provided by an embodiment of the present disclosure;

[0052] FIG17 shows a bottom view of the first sound-absorbing pad in FIG16;

[0053] FIG18 shows a top view of the first sound-absorbing pad in FIG16 ;

[0054] FIG19 shows a schematic cross-sectional view of CC in FIG18 ;

[0055] FIG20 is a schematic diagram showing the three-dimensional structure of a second noise-absorbing pad in a relay provided by an embodiment of the present disclosure;

[0056] FIG21 shows a bottom view of the second sound-absorbing pad in FIG20;

[0057] FIG. 22 is a top view of the second sound-absorbing pad in FIG. 20 .

[0058] FIG23 shows a schematic cross-sectional view at DD in FIG22 ;

[0059] FIG24 shows a schematic structural diagram of a fourth first noise-absorbing pad in a relay provided by an embodiment of the present disclosure;

[0060] FIG25 shows a cross-sectional view at EE in FIG24 ;

[0061] FIG26 is a top view showing the structure of a second relay provided by an embodiment of the present disclosure;

[0062] FIG. 27 is a schematic structural diagram of the first noise-absorbing pad corresponding to the relay in FIG. 26 .

[0063] The following are the descriptions of the reference numerals:

[0064] Related technologies: 01. Housing; 02. Insulation cover; 03. Static contact; 04. Moving contact piece; 05. Elastic member; 06. Push rod module; 07. Yoke plate; 08. Coil; 09. Static iron core; 010. Moving iron core; 011. Reset member; 012. U-shaped yoke; S01. First part; S02. Second part;

[0065] The present disclosure includes: 100, housing; 110, first housing; 111, exposure hole; 120, second housing; 200, main body assembly; 210, sealing unit; 211, insulating cover; 212, static contact; 213, moving contact piece; 214, elastic member; 215, push rod module; 2151, bracket; 2152, support seat; 2153, support rod; 216, yoke iron plate; 217, metal cover; 218, auxiliary contact; 220, electromagnet unit; 221, coil frame; 222, coil; 223, static iron core; 224, moving iron core; 225, reset member; 226, U shaped yoke; 227, magnetic tube; 230, arc extinguishing unit; 231, arc extinguishing magnet; 232, yoke clamp; 300, silencer; 301, sub-gasket; 310, first silencer pad; 311, main body; 3111, opening; 312, first extension; 313, guide slope; 314, second extension; 315, third extension; 316, avoidance groove; 317, raised structure; 3171, rib; 320, second silencer pad; 321, glue storage groove; 322, depression; 400, glue layer; S1, first part; S2, second part; P, second glue storage space. DETAILED DESCRIPTION

[0066] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0067] Figure 1 is an exploded perspective view of a relay according to an embodiment of the present disclosure; Figure 2 is a perspective view of the sealing unit 210 in Figure 1; and Figure 3 is a cross-sectional view of the relay in Figure 1. Referring to the structures shown in Figures 1 to 3, the relay includes a housing 100 and a main assembly 200 for switching a load.

[0068] Exemplarily, the main assembly 200 includes a sealing unit 210, an electromagnet unit 220, and an arc extinguishing unit 230. The sealing unit 210 is disposed within the housing 100, and the top of the static contact 212 of the sealing unit 210 is exposed to the outer surface of the housing 100 through the exposure hole 111 of the housing 100. The electromagnet unit 220 and the arc extinguishing unit 230 are both disposed within the housing 100. It will be understood that the relay in Figures 1 to 3 is shown as having two static contacts 212, but this is not limited to this.

[0069] As an example, referring again to the structure shown in FIG1 , the housing 100 includes a first shell 110 and a second shell 120 , which are engaged with each other to form a chamber for accommodating the sealing unit 210 , the electromagnet unit 220 , and the arc extinguishing unit 230 . It is worth noting that the structure of the first shell 110 and the second shell 120 is not limited to that shown in FIG1 . One of the first shell 110 and the second shell 120 may be a cover structure, and the other may be a cover plate. The specific configuration can be determined based on actual needs and will not be further described here.

[0070] As shown in Figures 1 to 3, the sealing unit 210 includes an insulating cover 211, a static contact 212, a movable contact piece 213 and an elastic member 214, wherein the movable contact piece 213 is placed in the insulating cover 211 and can move relative to the static contact 212 to contact or separate from the static contact 212; the static contact 212 is fixed relative to the insulating cover 211, and the side of the static contact 212 facing away from the movable contact piece 213 extends to the outside of the insulating cover 211 and is exposed by the exposure hole 111; the elastic member 214 is placed on the side of the movable contact piece 213 facing away from the static contact 212 to provide pressure for the contact between the movable contact piece 213 and the static contact 212.

[0071] Exemplarily, the insulating cover 211 is a ceramic cover. In addition, it is worth noting that the two ends of the movable contact piece 213 can contact or separate with the two static contacts 212, and the two ends of the movable contact piece 213 can form the main contacts of the relay with the two static contacts 212.

[0072] The arc extinguishing unit 230 is used to extinguish the arc generated between the static contact 212 and the movable contact piece 213 of the sealing unit 210 .

[0073] As an example, the arc-extinguishing unit 230 includes two arc-extinguishing magnets 231. The arc-extinguishing magnets 231 can be permanent magnets and each arc-extinguishing magnet 231 can be substantially rectangular. The two arc-extinguishing magnets 231 are respectively disposed on either side of the insulating cover 211 and are arranged opposite each other along the length of the movable contact piece 213.

[0074] It should be noted that by providing two arc-extinguishing magnets 231 disposed opposite each other, a magnetic field can be formed around the static contact 212 and the movable contact piece 213. Therefore, the arc generated between the two static contacts 212 and the movable contact piece 213 will be stretched away from each other by the magnetic field until it is disconnected, thereby extinguishing the arc.

[0075] The arc extinguishing unit 230 also includes two yoke clamps 232, which are arranged corresponding to the positions of the two arc extinguishing magnets 231. In addition, the two yoke clamps 232 surround the sealing unit 210 and the two arc extinguishing magnets 231. The design of the yoke clamps 232 surrounding the arc extinguishing magnets 231 can prevent the magnetic field generated by the arc extinguishing magnets 231 from spreading outward and affecting the arc extinguishing effect. The yoke clamps 232 are made of soft magnetic material. Soft magnetic materials can include but are not limited to iron, cobalt, nickel, and alloys thereof.

[0076] Continuing to refer to the structure shown in Figures 1 and 3, the sealing unit 210 also includes a push rod module 215, which includes a bracket 2151, a support seat 2152 and a support rod 2153. The bracket 2151 includes a base plate, which is located on one side of the moving contact piece 213, and the elastic member 214 is placed between the base plate and the moving contact piece 213; the support rod 2153 is used to drive the contact and separation of the moving contact piece 213 and the static contact 212, and one axial end of the support rod 2153 is fixed to the support seat 2152, and along the axial direction of the support rod 2153, the bracket 2151 is fixed to the side of the support seat 2152 facing away from the support rod 2153.

[0077] It is noteworthy that, along the axial direction of the support rod 2153, the elastic member 214 and the movable contact piece 213 are mounted on the side of the support base 2152 facing away from the support rod 2153, and the elastic member 214 and the movable contact piece 213 are mounted on the bracket 2151. As an example, the bracket 2151 includes a bottom plate, a top plate, and two oppositely disposed side plates. Along the axial direction of the support rod 2153, the two side plates are located on the same side of the bottom plate; the top plate is connected to the other ends of the two side plates facing away from the bottom plate, forming a frame-shaped structure with the bottom plate and the two side plates; the elastic member 214 is located within the frame-shaped structure. Of course, the structure of the bracket 2151 is not limited to this and can be configured as needed, and the details will not be repeated here.

[0078] Continuing to refer to the structures shown in FIG. 1 and FIG. 3 , the main assembly 200 further includes an electromagnet unit 220 , which is configured to drive the support rod 2153 to perform reciprocating motion, so that the movable contact piece 213 follows the support rod 2153 .

[0079] It is understandable that the support rod 2153 reciprocates under the driving action of the electromagnet unit 220 , so that the movable contact piece 213 moves along with the support rod 2153 , thereby achieving contact and separation between the movable contact piece 213 and the static contact 212 .

[0080] The sealing unit 210 also includes a yoke plate 216 and a metal cover 217. The insulating cover 211 is provided on one side of the yoke plate 216 to form a contact chamber. The contact chamber is used to accommodate the movable contact piece 213. The yoke plate 216 has a through hole connected to the contact chamber, and the push rod module 215 is movably inserted into the through hole; the metal cover 217 is connected to the side of the yoke plate 216 facing away from the insulating cover 211, and the metal cover 217 covers the through hole on the yoke plate 216. The metal cover 217 and the yoke plate 216 enclose a chamber for accommodating the static iron core 223 and the moving iron core 224 of the electromagnet unit 220, which will be described in detail below.

[0081] It is worth noting that, as shown in FIG3 , the relay components within the housing 100 can be understood as being divided into a first portion S1 and a second portion S2 by the yoke plate 216. For example, as shown in FIG3 , the insulating cover 211 , the static contact 212 , the movable contact piece 213 , and the elastic member 214 are entirely within the first portion S1 , the push rod module 215 is partially within the first portion S1 and partially within the second portion S2 , and the components within the electromagnet unit 220 are entirely within the second portion S2 .

[0082] In one embodiment, the first portion S1 has a main body and a protruding portion. Exemplarily, the static contact 212 forms the protruding portion. The internal structure of the first portion S1 excluding the static contact 212 forms the main body. The protruding portion protrudes from the surface of the main body and is partially placed in the corresponding exposure hole 111.

[0083] As an example, the electromagnet unit 220 includes a coil frame 221, a coil 222, a static iron core 223, a moving iron core 224 and a reset member 225. The coil frame 221 is hollow and cylindrical and is formed of an insulating material. The metal cover 217 is passed through the coil frame 221. The coil 222 surrounds the coil frame 221. The static iron core 223 is fixedly set in the metal cover 217, and part of the static iron core 223 extends into the through hole. The static iron core 223 has a through hole, and the through hole is arranged corresponding to the position of the through hole for the support rod 2153 to pass through. The moving iron core 224 is movably set in the metal cover 217 and is arranged opposite to the static iron core 223. The moving iron core 224 is connected to the support rod 2153 and is used to be attracted by the static iron core 223 when the coil 222 is energized. The moving iron core 224 and the support rod 2153 can be connected by screwing, riveting, welding or other methods.

[0084] The reset member 225 is located inside the metal cover 217 and is set between the static iron core 223 and the movable iron core 224. It is used to reset the movable iron core 224 when the coil 222 is powered off. The reset member 225 can be a spring and is sleeved on the outside of the support rod 2153.

[0085] A magnetic tube 227 is sleeved on the outside of the metal cover 217 , and a U-shaped yoke 226 is sleeved on the outside of the magnetic tube 227 . The coil frame 221 is placed between the magnetic tube 227 and the U-shaped yoke 226 to enhance the magnetic conductivity and improve the performance of the electromagnet unit 220 .

[0086] Taking a relay from related art as an example, as shown in Figure 4, in actual use, when coil 08 is energized, the moving iron core 010 rapidly attracts the yoke plate 07 or the stationary iron core 09. The smaller the magnetic gap between the moving iron core 010 and the yoke plate 07 or the stationary iron core 09, the greater the attraction. Throughout the power-up process, the acceleration and velocity of the moving iron core 010 continuously increase. "Closing noise" primarily occurs at position A in Figure 4, between the stationary iron core 09 and the moving iron core 010.

[0087] Continuing to refer to Figure 4, before the relay is disconnected, the main contacts and the iron core are in a completely closed state, the elastic member 05 is compressed, and the reset member 011 is also compressed, storing potential energy. When the driving end of the coil 08 inside the relay receives a power-off command, the potential energy stored in the elastic member 05 and the reset member 011 will be converted into the kinetic energy of the entire push rod module 06, thereby achieving the separation of the relay contacts. The entire movement will not terminate until the push rod module 06 hits the yoke plate 07 (or other stop member). The "release noise" mainly occurs at position B in Figure 4. Due to the large amount of energy, the push rod module 06 may collide with the yoke plate 07 (or other stop member) to produce a large "release noise".

[0088] In addition, during the on-off process of the relay, other components collide with each other, generating noise.

[0089] Figure 4 also shows the possible propagation paths of the noise within the relay. The propagation path of the noise generated when hitting the yoke plate 07 within the contact chamber is shown as path a in Figure 4. The noise is transmitted to the insulating cover 02 (without a rubber pad) through the internal gas, and then transmitted to the housing 01. Alternatively, the noise within the relay may be as shown by path b in Figure 4. The noise may be transmitted through the solid along the yoke plate 07 and the insulating cover 02 to the housing 01. Alternatively, the noise within the relay may be as shown by path c and path d in Figure 4. The noise may be transmitted through the solid along the yoke plate 07 and the U-shaped yoke 012 to the housing 01. It is worth noting that the noise in path c and path d is transmitted to the outside of the housing 01 from different positions.

[0090] Obviously, as shown in FIG4 , the yoke plate 07 is located on the main transmission path of the internal noise of the relay. The noise generated at position A may be transmitted to the first part S01 and / or the second part S02 through the yoke plate 07; similarly, the noise generated at position B may be transmitted to the first part S01 and / or the second part S02 through the yoke plate 07.

[0091] It will be understood that the above examples are intended to introduce locations where noise may occur in the relay.

[0092] Continuing with reference to the structures shown in Figures 1 to 3 and 5, the relay provided in the embodiment of the present disclosure includes a housing 100, a main assembly 200 for switching a load, and a silencer 300. The silencer 300 is located in at least a portion of the area between the housing 100 and the main assembly 200, and the silencer 300 and the housing 100 are integrally formed. The main assembly 200 includes a yoke plate 216, which separates the main assembly 200 into a first portion S1 and a second portion S2. The silencer 300 and the main assembly 200 are bonded together by an adhesive layer 400. It will be understood that, to facilitate illustration of the structure of the silencer 300, the silencer 300, which is integrally formed with the housing 100, is shown in the exploded state in the exploded schematic diagram of Figure 1. In actual use, the silencer 300 and the housing 100 are integrated.

[0093] Specifically, the housing 100 and the silencer 300 are integrally molded, reducing the number of components within the relay, eliminating glue dispensing steps, and simplifying assembly. Specifically, the housing 100 and the silencer 300 can be integrally molded using an injection molding process. The silencer 300 is bonded to the main assembly 200 via an adhesive layer 400, effectively securing the relative positions of the housing 100 and main assembly 200. It should be understood that when assembling a relay formed with this structure, only the main assembly 200 and the housing 100 need to be bonded, reducing assembly steps and simplifying assembly.

[0094] It should be noted that in the relay provided by the embodiment of the present disclosure, the silencer 300 is fixed to the housing 100 and the main assembly 200, which can reduce or even prevent the main assembly 200 from shaking relative to the housing 100, thereby reducing the noise generated in the relay. Specifically, when only the adhesive layer 400 is provided between the housing 100 and the main assembly 200, the adhesive layer 400 may form a noise transmission channel between the housing 100 and the main assembly 200. Accordingly, the silencer 300 in the relay provided by the embodiment of the present disclosure is located on the noise propagation path, which can better exert the noise reduction effect. The silencer 300 can perform flexible damping to absorb vibrations to achieve a noise reduction effect, reduce the noise transmitted from the inside of the relay to the outside, and improve the user experience.

[0095] Furthermore, since the silencer 300 is fixed to both the housing 100 and the main assembly 200, this structural arrangement not only enhances the noise reduction capabilities of the silencer 300 but also improves the withstand voltage insulation performance of the relay. Specifically, since the silencer 300 is positioned between the housing 100 and the main assembly 200 and is effectively fixed (by gluing or integrally formed) to both the housing 100 and the main assembly 200, a gap is unlikely to form between the main assembly 200 and the housing 100, preventing electricity from "creeping" through the gap and affecting the withstand voltage insulation performance between the main contacts.

[0096] In addition, since the silencer 300 has a certain elasticity, the silencer 300 can also play a buffering role to reduce the vibration of the internal structural components of the relay and improve the structural performance of the relay.

[0097] It is understood that the adhesive layer 400 can be formed by glue or double-sided tape. When glue is used to form the adhesive layer 400, the adhesive layer 400 can be formed by dispensing or pouring glue. For example, glue can be dispensed between the main assembly 200 and the silencer 300. After the glue cures, the adhesive layer 400 shown in Figure 5 is formed, which can bond and fix the main assembly 200 and the silencer 300.

[0098] It's worth noting that the sealing unit 210 in the main assembly 200 provided in the present embodiment effectively seals the internal components through its own structure. Therefore, when applying glue between the main assembly 200 and the muffler 300, the adhesive layer 400 formed after application primarily serves to secure the components. Of course, this adhesive layer 400 also provides a certain sealing effect, which will not be further elaborated.

[0099] To facilitate understanding of the relay provided by the embodiment of the present disclosure, the side of the relay leading out the static contact 212 may be defined as the top; and correspondingly, the other side opposite to the static contact 212 may be defined as the bottom.

[0100] When the silencer 300 is provided, there are many possible structures of the silencer 300 . For example, the silencer 300 may be one of the following structures.

[0101] In one embodiment, as shown in the structures of FIG. 6 to FIG. 9 , the sound-absorbing member 300 includes a first sound-absorbing pad 310 . The first sound-absorbing pad 310 is located between the housing 100 and a side of the first portion S1 facing away from the second portion S2 .

[0102] In one specific embodiment, the first sound-absorbing pad 310 is positioned between the side of the housing 100 where the exposure hole 111 is provided and the main body. The first sound-absorbing pad 310 includes a main body 311 having an opening 3111. The protrusion 3111 is positioned within the corresponding opening 3111 and extends through the opening 3111 into the exposure hole 111. It is understood that the first sound-absorbing pad 310 serves as a sound-absorbing structure for the main assembly 200 and the top area of ​​the housing 100.

[0103] It should be noted that, considering the noise propagation path, the first noise-absorbing pad 310 is located in the two main noise propagation paths. The first noise-absorbing pad 310 can effectively absorb the noise inside the relay to reduce the noise transmitted from the inside of the relay to the outside.

[0104] When the first sound-absorbing pad 310 is set, the first sound-absorbing pad 310 is bonded to the main body component 200, and the first sound-absorbing pad 310 is bonded to the shell 100 to improve the stability of the first sound-absorbing pad 310 inside the relay, and to improve the stability between the shell 100, the main body component 200 and the first sound-absorbing pad 310 to reduce noise.

[0105] In one embodiment, as shown in the structure of Figures 6 to 9, the first sound-absorbing pad 310 also includes a first extension portion 312 for blocking glue. The first extension portion 312 is connected to the main body portion 311 (exemplarily the insulating cover 211) and extends between the side wall of the exposure hole 111 and the protrusion (such as the static contact 212).

[0106] It should be noted that when bonding the first sound-absorbing pad 310 to the main assembly 200, glue is applied to the surface of the insulating cover 211. Afterwards, when the first sound-absorbing pad 310 is assembled, the uncured adhesive layer 400 may extend away from the insulating cover 211 along the gap between the static contact 212 and the opening 3111. In this embodiment, at least a portion of the first extension 312 is disposed between the exposed hole 111 and the protrusion. This structural arrangement primarily prevents the adhesive layer 400 from overflowing, serves as a glue barrier, and even provides insulation and voltage resistance.

[0107] Specifically, when the first sound-absorbing pad 310 is bonded to one side of the main assembly 200 using an adhesive layer 400, this adhesive layer 400 may overflow onto the housing 100, which is integrally formed with the first sound-absorbing pad 310. Furthermore, this adhesive layer 400 may form a solid path for noise transmission after connecting to the housing 100. Therefore, the provision of the first extension 312 prevents the adhesive layer 400 from overflowing, thus preventing the housing 100 from forming a solid path for noise transmission after connecting to the adhesive layer 400, thereby ensuring that the sound-absorbing member 300 effectively performs its buffering, soundproofing, and noise-reducing functions.

[0108] In addition, after the glue is filled between the first extension portion 312 and the static contact 212, the creepage gap between the main contacts can be increased, thereby achieving insulation and voltage resistance.

[0109] In one embodiment, the first sound-absorbing pad 310 forms a first glue storage space on a side facing the main body, together with the sidewall of the protruding portion and the main body. The first glue storage space is used to fill the glue layer 400 .

[0110] It should be noted that in this embodiment, a "glue storage" structure is designed for the main assembly 200 and the first sound-absorbing pad 310. The first glue storage space is used to fill with glue, which can ensure that the first sound-absorbing pad 310 and the main body are connected to form an insulating wall, thereby ensuring the creepage distance here. Specifically, when glue is dispensed on the surface of the insulating cover 211 (i.e., the main body) and the first sound-absorbing pad 310 is assembled with the main assembly 200, the glue can be "squeezed" into the first glue storage space (as shown by the black filling in Figure 10). When the glue in the first glue storage space is filled in place, the glue in the first glue storage space can form an insulating wall structure to avoid creepage problems.

[0111] At the same time, the first adhesive storage space can also improve the bonding strength between the first sound-absorbing pad 310 and the main assembly 200, thereby improving the stability of related structural components in the relay.

[0112] In a specific embodiment, as shown in Figure 9, the first sound-absorbing pad 310 is provided with a guide slope 313 around the protrusion. It is understood that the guide slope 313 can be formed by the main body 311 alone, or the guide slope 313 can be formed by the main body 311 and the first extension 312.

[0113] It should be noted that the guide slope 313 provided on the first sound-absorbing pad 310 is used to cooperate with the main assembly 200 to form the first adhesive storage space mentioned above. As the static contact 212 approaches the exposure hole 111, the distance between the guide slope 313 and the static contact 212 gradually decreases, so that the first adhesive storage space is larger on the side closer to the insulation cover 211 and smaller on the side farther away from the insulation cover 211. This reserves more adhesive storage space and facilitates the filling of the adhesive layer 400 into the first adhesive storage space.

[0114] In addition, the guide slope 313 can also play a guiding role during assembly, so as to facilitate the assembly of the first noise-absorbing pad 310 and the static contact 212.

[0115] Of course, the inner surface of the first sound-absorbing pad 310 is not limited to being set as the guide slope 313 shown in Figure 9, and can also be set as other types according to needs, which will not be described in detail.

[0116] In one embodiment, as shown in Figures 6 to 9 , the first sound-absorbing pad 310 further includes a second extension 314. The second extension 314 is located on the side of the main body 311 facing away from the exposure hole 111 of the housing 100, and abuts the outer wall of the main body. This second extension 314 positions and blocks some glue from flowing downward. Furthermore, if glue flows onto the surface of the insulating cover 211 and solidifies, it does not affect performance. Therefore, the second extension 314 can be positioned as needed.

[0117] In one embodiment, as shown in Figures 6 to 9, the first sound-absorbing pad 310 further includes a third extension portion 315, which is located on the same side of the main body portion 311 as the first extension portion 312, and the third extension portion 315 is located on the side of the first extension portion 312 facing away from the protrusion and is spaced apart from the first extension portion 312, with a portion of the housing 100 placed between the first extension portion 312 and the third extension portion 315.

[0118] It is understood that the gap between the third extension portion 315 and the first extension portion 312 can be understood as forming a second glue storage space P. The second glue storage space P is used to be filled with plastic from the housing 100 that is integrally injection-molded with the first sound-absorbing pad 310. Exemplarily, the second glue storage space P is shown in the form of a glue storage ring.

[0119] It should be noted that, as shown in FIG6 and FIG9, the second glue storage space P is conducive to the plastic filling of the housing 100, which can ensure that the first sound-absorbing pad 310 and the housing 100 are connected to form an insulating wall, thereby ensuring the creepage distance there.

[0120] It is understood that the main body 311 , the first extension portion 312 , the second extension portion 314 and the third extension portion 315 of the first sound-absorbing pad 310 shown in FIG. 9 are schematically separated by dotted lines, but the present invention is not limited thereto.

[0121] If other structures protrude from the top of the insulating cover 211, as shown in Figure 11, a relief portion (not shown in Figures 6 to 9) must be provided on the first muffler pad 310 to provide relief. For example, the structure protruding from the top of the insulating cover 211 is the auxiliary contact 218. Of course, the structure protruding from the top of the insulating cover 211 is not limited to the auxiliary contact 218 and can also be other structures, such as an exhaust pipe or a welding terminal.

[0122] As an example, when two static contacts 212 are provided in the relay, the avoidance portion is provided in the main body 311 and is located between the two openings 3111 to make way for structures such as the auxiliary contact 218 as shown in FIG. 11 .

[0123] When specifically providing the relief portion, the relief portion can have various structural forms. For example, the relief portion can be a relief through-hole or a relief groove 316 as shown in FIG. 7 . In one specific embodiment, when the relief portion is a relief through-hole, the relief through-hole can penetrate the body portion 311 along the thickness direction of the body portion 311. In another specific embodiment, the relief portion can be a relief groove 316, the opening of which faces the insulating cover 211. It should be understood that due to the limited thickness of the body portion 311 of the first sound-absorbing pad 310, a raised structure 317 is formed on the side of the body portion 311 facing away from the main body at the position corresponding to the relief groove 316. The surface of the raised structure 317 can be provided with ribs 3171 as shown in FIG. 6 and FIG. 8 , or it can be absent as shown in FIG. 12 to FIG. 15 . The structure of the ribs 3171 can be configured as required. For example, it can be a corrugated shape as shown in FIG. 6 or FIG. 8 , or it can also be a dispersed dot shape.

[0124] When the housing 100 and the first sound-absorbing pad 310 are integrally formed, the rib 3171 increases the injection molding contact area and improves the bonding strength between the integrally formed sound-absorbing pad and the housing 100 .

[0125] It is worth noting that a rib 3171 may also be provided on the side of the first muffler pad 310 facing the insulating cover 211. Specifically, the first muffler pad 310 may have an interference fit rib 3171 provided on the side facing the insulating cover 211 and between the two static contacts 212 to cooperate with the top surface of the insulating cover 211 and enhance the creepage insulation capability between the static contacts 212.

[0126] In addition, when the avoidance portion is an avoidance groove 316 , as shown in FIG. 16 to FIG. 19 , a small through hole may be formed at the bottom of the avoidance groove 316 to better avoid structures such as the auxiliary contact 218 .

[0127] Since the size of the small through hole is small, the protruding structure 317 corresponding to the avoidance groove 316 can still be set to the above-mentioned glue dispensing or non-glue dispensing to play the corresponding role.

[0128] When the first sound-absorbing pad 310 is used, one or more of the first extension portion 312 , the guide slope 313 , the second extension portion 314 , and the third extension portion 315 avoidance portion can be provided on the main body 311 of the first sound-absorbing pad 310 as required, and the details are not repeated here.

[0129] Of course, when the first sound-absorbing pad 310 and the housing 100 are integrally provided, the structure of the first sound-absorbing pad 310 may also be changed relative to the structure in FIG. 21 and FIG. 22 , and details thereof will not be repeated.

[0130] In one embodiment, referring to the structures shown in Figures 20 to 23 in conjunction with Figure 1 , the silencer 300 further includes a second sound-absorbing pad 320 located between the side of the second portion S2 facing away from the first portion S1 and the housing 100. The second sound-absorbing pad 320 in Figure 20 may be different from the second sound-absorbing pad 320 in Figure 1 and serves as two examples. It should be understood that the second sound-absorbing pad 320 can be understood as a sound-absorbing structure in the bottom area of ​​the main body assembly 200 and the housing 100 to reduce noise transmitted from the interior of the relay to the outside.

[0131] It should be noted that, in this embodiment, the second sound-absorbing pad 320 and the housing 100 are an integrally formed structure, and the second sound-absorbing pad 320 can be bonded and fixed to the main assembly 200 using an adhesive layer 400.

[0132] For example, the second sound-absorbing pad 320 can be provided between the U-shaped yoke 226 and the housing 100. The assembly steps include, but are not limited to, applying glue to the surface of the second sound-absorbing pad 320 integrally formed with the housing 100, and then assembling the main assembly 200 to reduce shaking of the main assembly 200 within the housing 100, thereby further reducing noise.

[0133] In one embodiment, with continued reference to the structures shown in FIG. 20 to FIG. 23 , the second sound-absorbing pad 320 is provided with a glue storage groove 321 to increase the bonding force after assembly and enhance the creepage insulation capability.

[0134] It is worth noting that, as shown in Figures 20 to 22, the second muffler pad 320 can be provided with a recess 322 to match the internal structure of the relay and facilitate alignment between adjacent structures. Of course, the structure that plays the role of alignment does not necessarily need to be a recess 322, but can also be a protrusion, which will not be detailed here.

[0135] In one embodiment, the muffler 300 includes a third muffler pad (not shown) located between the sidewalls of the housing 100 and the sidewalls of the main assembly 200. It is understood that the third muffler pad can be understood as a muffler structure in the side areas of the main assembly 200 and the housing 100 to reduce noise transmitted from the interior of the relay to the outside.

[0136] The third sound-absorbing pad is integrally formed with the housing 100 and can be bonded to the main assembly 200 using an adhesive layer 400, details of which are omitted. Similarly, the surface of the third sound-absorbing pad can be designed with adhesive grooves 321 similar to those on the surface of the second sound-absorbing pad 320, as needed. Details of which are omitted.

[0137] It's worth noting that the first noise-absorbing pad 310 in the aforementioned figures is shown as a single piece. Of course, the first noise-absorbing pad 310 can also include multiple sub-gaskets 301, with these sub-gaskets 301 spaced apart to effectively utilize the space within the relay. For example, as shown in Figures 24 and 25 , when there are two static contacts 212 within the relay, the first noise-absorbing pad 310 can include two sub-gaskets 301, each with an opening 3111 to facilitate assembly between the sub-gasket 301 and the static contact 212.

[0138] When the sub-gasket 301 is specifically provided, a first extension portion 312 , a guide slope 313 , a third extension portion 315 and a second extension portion 314 may be provided on the sub-gasket 301 as required, and details thereof will not be repeated herein.

[0139] Furthermore, when configuring the relay provided by the embodiments of the present disclosure, the relay is not limited to having only two static contacts 212. The number of static contacts 212 within the relay can be set as needed. For example, as shown in FIG26 , the number of static contacts 212 within the relay is four. Accordingly, as shown in FIG27 , the first sound-absorbing pad 310 within the relay can be provided with four openings 3111 corresponding to the corresponding static contacts 212.

[0140] It can be understood that the first sound-absorbing pad 310 in Figure 27 is an integrated structure. Of course, the first sound-absorbing pad 310 can also be set to include two sub-gaskets 301, three sub-gaskets 301 and four sub-gaskets 301, and the specific structures between the sub-gaskets 301 can be the same or different.

[0141] Furthermore, each of the first, second, or third sound-absorbing pads 310, 320, or 311 can be a multi-layer or single-layer structure. For example, consider the case where the first sound-absorbing pad 310 includes multiple stacked sound-absorbing layers. Specifically, adjacent sound-absorbing layers must be fixed to each other. The top layer of the multi-layer sound-absorbing layer can be integrally molded with the housing 100, while the bottom layer of the multi-layer sound-absorbing layer can be bonded to the main assembly 200.

[0142] In one embodiment, at least a portion of the housing 100 and the main body assembly 200 are bonded and fixed.

[0143] It should be noted that in the relay provided in the embodiment of the present disclosure, the housing 100 and the main body component 200 can be bonded and fixed in the area where the silencer 300 is set, or even in other areas, to further reduce or even avoid the shaking of the main body component 200 relative to the housing 100, so as to further reduce the noise generated in the relay.

[0144] It is understood that the gluing process is simple and easy to operate, and the glue has strong adhesion, which can reliably and stably bond the parts and components it contacts. Of course, in areas where the silencer 300 is not provided, other fixing methods can be used between the housing 100 and the main assembly 200, such as the housing 100 and the main assembly 200 being fixedly connected by an interference fit.

[0145] It is worth noting that the first sound-absorbing pad 310, the second sound-absorbing pad 320 or the third sound-absorbing pad in the above embodiments can be provided separately or in combination. Accordingly, in conjunction with the adhesive fixation between the housing 100 and the main assembly 200, several specific application examples are now provided.

[0146] Example 1: The first sound-absorbing pad 310 is provided, and the housing 100 and the main body assembly 200 are glued at the bottom. In this example 1, the housing 100 and the main body assembly 200 can be fixed (eg, glued) or not fixed at the sides.

[0147] Example 2: A second sound-absorbing pad 320 is provided, and glue is applied to the top of the housing 100 and the main assembly 200. In this example 2, the housing 100 and the main assembly 200 can be fixed (eg, glued) or not fixed at the sides.

[0148] Example 3: Setting a first sound-absorbing pad 310 and a second sound-absorbing pad 320. In this example 3, the housing 100 and the main body assembly 200 may be fixed (eg, glued) or not fixed at the sides.

[0149] Example 4: Setting a third sound-absorbing pad In this example 4, the housing 100 and the main assembly 200 may be fixed (eg, glued) or not fixed at the top and bottom.

[0150] In the above exemplary embodiments, the first sound-absorbing pad 310 , the second sound-absorbing pad 320 and the third sound-absorbing pad are all formed into an integral structure with the housing 100 , and are all fixed to the main assembly 200 via the adhesive layer 400 .

[0151] It is worth noting that any of the first, second, and third sound-absorbing pads 310, 320, and 3rd sound-absorbing pads in the aforementioned sound-absorbing member 300 can be made of an elastic material such as synthetic rubber, synthetic silicone rubber, synthetic resin, sponge gasket, or polyurethane. Furthermore, the materials used to make the first, second, and third sound-absorbing pads 310, 320, and 3rd sound-absorbing pads can be the same or different.

[0152] In a specific embodiment, the relay provided by the present disclosure is provided with a first sound-absorbing pad 310 and a second sound-absorbing pad 320. The first sound-absorbing pad 310 is placed on the top of the main assembly 200, and the second sound-absorbing pad 320 is placed on the bottom of the main assembly 200. The first sound-absorbing pad 310 and the second sound-absorbing pad 320 are integrally formed with the housing 100, and both are fixed to the main assembly 200 via an adhesive layer 400.

[0153] It should be noted that this specific embodiment has the following advantages: 1. The upper and lower sides are convenient for assembly operations; 2. The upper and lower sides are fixed by gluing. On the basis of stable structural bonding, the outer shell 100 and the main body component 200 do not need to be fixed by gluing on the left and right sides. Due to the gap set between the outer shell 100 and the main body component 200 on both sides, the noise propagation on both sides needs to pass through the air medium, and air propagation is slower than solid propagation and has smaller propagation energy. Therefore, this layout can also reduce the propagation of internal noise to the outside.

[0154] In another specific embodiment, the inner wall of the housing 100 and the silencer 300 are all integrally formed and are only bonded and fixed in areas where they are needed. In this specific embodiment, the silencer 300 is arranged all around the interior of the housing 100 to further reduce noise.

[0155] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided in the present disclosure can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0156] In the disclosed embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the disclosed embodiments can be understood according to the specific circumstances.

[0157] In the description of the disclosed embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the disclosed embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the disclosed embodiments.

[0158] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the disclosed embodiments. Throughout this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0159] The above are merely preferred embodiments of the disclosed embodiments and are not intended to limit the disclosed embodiments. Those skilled in the art will readily appreciate that various modifications and variations of the disclosed embodiments are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the disclosed embodiments shall be included within the scope of protection of the disclosed embodiments.

Claims

1. A relay, characterized in that: include: Housing, main body components for realizing load switching and silencers; The silencer is located in at least a portion of the area between the outer shell and the main body component, and the silencer and the outer shell are an integrally formed structure; the main body component includes a yoke plate, which separates the main body component into a first part and a second part; the silencer and the main body component are bonded by an adhesive layer.

2. The relay according to claim 1, wherein: The sound-absorbing member includes a first sound-absorbing pad located between a side of the first portion facing away from the second portion and the housing.

3. The relay according to claim 2, characterized in that The housing is provided with a revealing hole; The first part comprises a main body and a protruding part; the protruding part protrudes from the surface of the main body and is partially placed in the corresponding exposure hole.

4. The relay according to claim 3, characterized in that The first sound-absorbing pad is located between the side of the shell where the exposure hole is set and the main body; the first sound-absorbing pad includes a main body, the main body is provided with an opening, and the protrusion extends into the exposure hole through the corresponding opening.

5. The relay according to claim 4, characterized in that The first sound-absorbing pad further includes a first extension portion for blocking glue, wherein the first extension portion is connected to the main body portion and extends between the side wall of the exposure hole and the protruding portion.

6. The relay according to claim 5, characterized in that The first sound-absorbing pad forms a first glue storage space on a side facing the main body, together with the side wall of the protruding portion and the main body, and the first glue storage space is used to fill the glue layer.

7. The relay according to claim 6, characterized in that The first sound-absorbing pad is provided with a guiding inclined surface around the protruding portion; along the direction where the protruding portion approaches the exposure hole, the distance between the guiding inclined surface and the protruding portion gradually decreases.

8. The relay according to claim 4, wherein: The first sound-absorbing pad further includes a second extension portion, which is located on a side of the main body facing away from the shell where the exposure hole is provided, and the second extension portion abuts against an outer wall of the main body.

9. The relay according to claim 4, characterized in that The first sound-absorbing pad is provided with an avoidance portion.

10. The relay according to claim 9, characterized in that The avoidance portion is a avoidance through hole.

11. The relay according to claim 9, characterized in that The avoidance portion is a avoidance groove, and the avoidance groove is recessed from the main body portion toward a side surface of the main body portion in a direction away from the main body portion.

12. The relay according to claim 11, wherein: On a side of the main body away from the main body, a convex structure is formed on the main body at a position corresponding to the avoidance groove, and a convex rib is provided on the convex structure.

13. The relay according to any one of claims 2 to 12, characterized in that: The first sound-absorbing pad includes a plurality of sub-gaskets, and the plurality of sub-gaskets are arranged at intervals.

14. The relay according to claim 5, characterized in that The first sound-absorbing pad also includes a third extension portion, which is located on the same side of the main body as the first extension portion, and is located on the side of the first extension portion facing away from the protrusion, and is spaced apart from the first extension portion, with part of the outer shell being placed between the first extension portion and the third extension portion.

15. The relay according to any one of claims 1 to 12, characterized in that: The sound-absorbing member includes a second sound-absorbing pad located between a side of the second portion facing away from the first portion and the housing.

16. The relay according to claim 15, characterized in that The second sound-absorbing pad is provided with a glue storage groove for storing the glue layer.

17. The relay according to any one of claims 1 to 12, characterized in that: The sound-absorbing member includes a third sound-absorbing pad located between a side wall of the shell and a side wall of the main body assembly.

18. The relay according to any one of claims 1 to 12, characterized in that: At least a portion of the area between the shell and the main body component is bonded and fixed.

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