Relay

Abstract

The present disclosure relates to the technical field of electronic control devices, and specifically relates to a relay. The relay comprises: a first housing, an insulating cover and a silencing pad, wherein the first housing is located on one side of the insulating cover; the insulating cover is used for covering a contact portion of a main contact; and there is a fixing region between the first housing and the insulating cover, and the silencing pad is disposed in at least part of the fixing region. By means of optimizing its own structure, the relay can reduce noise transmitted from the top of the relay to the outside, thereby improving the user experience.

Description

relay

[0001] This disclosure claims priority to Chinese patent application No. 202420406728.3 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] When actually using a relay, there is closing noise and releasing noise inside the relay. Or, during the on-off process of the relay, other parts may collide with each other, generating noise.

[0005] 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.

[0006] Therefore, there is an urgent need to provide a relay that can reduce noise. Summary of the Invention

[0007] An embodiment of the present disclosure provides a relay that can reduce noise transmitted from the top 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 first shell, an insulating cover and a sound-absorbing pad; the first shell is located on one side of the insulating cover; the insulating cover is used to cover the contact portion of the main contact; a fixed area is provided between the first shell and the insulating cover, and a sound-absorbing pad is provided in at least part of the fixed area.

[0009] According to some disclosed embodiments, an adhesive layer is provided in the fixing area.

[0010] According to some disclosed embodiments, the first shell and the sound-absorbing pad are an integrally formed structure, and the sound-absorbing pad and the insulating cover are bonded by the adhesive layer.

[0011] According to some disclosed embodiments, the first shell and the sound-absorbing pad are split structures, and the insulating cover and the sound-absorbing pad are bonded to each other through the adhesive layer, and the first shell and the sound-absorbing pad are bonded to each other through the adhesive layer.

[0012] According to some disclosed embodiments, the first shell is provided with an exposure hole; the relay also includes a static contact, which is fixed relative to the insulating cover, and the static contact extends from one side of the insulating cover away from the first shell to the other side and is exposed by the exposure hole.

[0013] According to some disclosed embodiments, the sound-absorbing pad is located between the side of the first shell where the exposure hole is set and the insulating cover; the sound-absorbing pad includes a main body, the main body is provided with an opening, and the static contact extends into the exposure hole through the corresponding opening.

[0014] According to some disclosed embodiments, the 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 static contact.

[0015] According to some disclosed embodiments, the muffler pad forms a first glue storage space on a side facing the insulating cover together with the side wall of the static contact and the static contact, and the first glue storage space is used to fill the glue layer.

[0016] According to some disclosed embodiments, the noise-absorbing pad is provided with a guide slope around the static contact; and the distance between the guide slope and the static contact gradually decreases as the static contact approaches the exposure hole.

[0017] According to some disclosed embodiments, the sound-absorbing pad also includes a second 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 static contact, and is spaced apart from the first extension portion, forming a second glue storage space between the second extension portion, the first extension portion and the inner wall of the first shell.

[0018] According to some disclosed embodiments, the second extension portion abuts against an inner wall of the first shell on one side facing the insulating cover.

[0019] According to some disclosed embodiments, the sound-absorbing pad further includes a third extension portion, which is located on a side of the main body facing away from the first shell where the exposure hole is provided, and the third extension portion abuts against an outer wall of the insulating cover.

[0020] According to some disclosed embodiments, the sound-absorbing pad is provided with an avoidance portion.

[0021] According to some disclosed embodiments, the avoidance portion is an avoidance through-hole.

[0022] According to some disclosed embodiments, the avoidance portion is a avoidance groove, and the avoidance groove is recessed from the main body portion toward one side surface of the insulation cover in a direction away from the insulation cover.

[0023] According to some disclosed embodiments, a protruding structure is formed on the side of the main body away from the insulating cover at a position corresponding to the avoidance groove, and a rib is provided on the protruding structure.

[0024] According to some disclosed embodiments, the sound-absorbing pad includes a plurality of sub-gaskets, and the plurality of sub-gaskets are arranged at intervals.

[0025] According to some disclosed embodiments, the relay further includes a moving contact piece and an elastic member, wherein the moving contact piece is placed in the insulating cover, and its two ends can move relative to the static contact to contact or separate with the static contact; the part where the static contact contacts and cooperates with the moving contact piece forms the contact part of the main contact; the elastic member is placed on the side of the moving contact piece facing away from the static contact to provide pressure for the contact between the moving contact piece and the static contact.

[0026] According to some disclosed embodiments, the relay further includes a second housing, which is fixed relative to the first housing to form a chamber for accommodating the insulating cover.

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

[0028] 1. In the relay provided herein, the insulating cover and the first housing are fixed in a fixed area, which can reduce or even prevent the insulating cover from shaking relative to the first housing, thereby reducing noise generated within the relay. Furthermore, the relay provided herein includes a sound-absorbing pad between the insulating cover and the first housing. This pad, placed in the noise propagation path, provides flexible damping to absorb vibrations, achieving a noise reduction effect. This reduces noise transmitted from the top of the relay to the outside, thereby improving the user experience. Furthermore, due to its certain elasticity, the pad also acts as a buffer, reducing vibrations within the relay's internal components and improving the relay's structural performance.

[0029] At the same time, the silencer pad in the fixed area is in a fixed state. This structural setting can prevent the silencer pad from shaking in the relay, allowing the silencer pad to better play its noise reduction, shock absorption and buffering functions.

[0030] 2. In the relay provided herein, the first housing and the insulating cover are bonded together via an adhesive layer within the adhesive fixing area. This improves the structural stability of the first housing and the insulating cover after they are fixed, preventing the insulating cover from shaking relative to the first housing and reducing noise. The gluing process is simple and easy to operate, and the adhesive has strong adhesion, enabling reliable and stable bonding of the parts and components it contacts. Furthermore, when the muffler pad is positioned within the fixing area, it is equivalent to being placed in the solid propagation path of the noise, thereby better facilitating buffering, vibration absorption, and sound insulation and noise reduction.

[0031] 3. In the relay provided by the present invention, at least part of the first extension part is arranged between the exposed hole and the static contact. 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 both sides of the silencer pad are bonded with glue layers, and the two glue layers are connected by the overflowed glue. After the two glue layers are connected, a solid propagation path for noise will be formed, and the noise will propagate outward through this path, affecting the noise reduction effect. Accordingly, by providing the first extension part, the glue layer can be prevented from overflowing, and the formation of a solid propagation path for noise after the two glue layers are connected can be avoided, thereby ensuring that the silencer pad effectively plays a role in buffering, sound insulation and noise reduction. At the same time, after the glue is filled between the first extension part and the static contact, the creepage gap between the main contacts can also be increased, playing a role in insulation and voltage resistance.

[0032] 4. The relay provided by the present invention has a "glue storage" structure design for the insulating cover and the silencer pad. The first glue storage space is used to fill with glue, which can ensure that the silencer pad and the insulating cover 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 and the silencer pad and the insulating cover are assembled, 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 silencer pad and the insulating cover to improve the stability of related structural parts in the relay.

[0033] 5. In the relay provided herein, the muffler pad is provided with a second glue storage space. This second glue storage space facilitates the filling of glue forming the glue layer or the plastic of the first housing integrally injection-molded with the muffler pad, thereby ensuring that the second muffler pad and the first housing are connected to form an insulating wall, thereby ensuring creepage distance. Furthermore, after the muffler pad is assembled with the first housing and the glue cures, the first housing and the muffler pad are fixedly connected by the glue layer, which improves the stability of related structural components within the relay, ensures that the insulating cover does not shake within the first housing, and reduces noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is an exploded perspective view of a relay according to an embodiment of the present disclosure;

[0035] FIG2 is a schematic diagram showing the three-dimensional structure of the sealing unit in FIG1 ;

[0036] FIG3 shows a schematic cross-sectional view of the relay of FIG1 ;

[0037] FIG4 shows a cross-sectional schematic diagram of a relay in the related art;

[0038] FIG5 is a schematic cross-sectional view showing a portion of the structure in FIG3 ;

[0039] FIG6 shows another schematic cross-sectional view of a portion of the structure in FIG3 ;

[0040] FIG7 is a schematic diagram showing the three-dimensional structure of the first type of sound-absorbing pad in FIG1 ;

[0041] FIG8 shows a bottom view of the sound-absorbing pad in FIG7 ;

[0042] FIG9 shows a top view of the sound-absorbing pad in FIG7 ;

[0043] FIG10 shows a schematic cross-sectional view of the section AA in FIG9 ;

[0044] FIG11 is a cross-sectional view showing the sound-absorbing pad in FIG7 assembled on the surface of the insulating cover;

[0045] FIG12 is a schematic diagram showing the three-dimensional structure of another sealing unit in a relay provided by an embodiment of the present disclosure;

[0046] FIG13 is a schematic diagram showing the three-dimensional structure of a second type of noise-reducing pad in a relay provided by an embodiment of the present disclosure;

[0047] FIG14 shows a bottom view of the sound-absorbing pad in FIG13;

[0048] FIG15 shows a top view of the sound-absorbing pad in FIG13;

[0049] FIG16 shows a schematic cross-sectional view at BB in FIG15 ;

[0050] FIG17 is a schematic diagram showing the three-dimensional structure of a third type of noise-reducing pad in a relay provided by an embodiment of the present disclosure;

[0051] FIG18 shows a bottom view of the sound-absorbing pad in FIG17;

[0052] FIG19 shows a top view of the sound-absorbing pad in FIG17;

[0053] FIG20 shows a schematic cross-sectional view of CC in FIG19 ;

[0054] FIG21 is a schematic cross-sectional view showing the case where the sound-absorbing pad and the first shell are integrally provided in FIG1 ;

[0055] FIG22 is a schematic cross-sectional view of the structure of FIG21 after assembly;

[0056] FIG23 shows a schematic structural diagram of a fourth type of noise-reducing pad in a relay provided by an embodiment of the present disclosure;

[0057] FIG24 shows a cross-sectional view at DD in FIG23 ;

[0058] FIG25 is a top view showing the structure of another relay provided by an embodiment of the present disclosure;

[0059] FIG. 26 is a schematic structural diagram of a noise-reducing pad of the relay in FIG. 25 .

[0060] : The accompanying drawings are described as follows: Related technology: 01, housing; 02, insulating 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; The present disclosure: 100, housing; 110, first shell; 111, exposure hole; 120, second shell; 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 plate; 217, metal cover; 218, auxiliary contact; 220, electromagnet unit; 221, coil frame; 222, coil; 22 3. Static iron core; 224. Moving iron core; 225. Resetting member; 226. U-shaped yoke; 230. Arc extinguishing unit; 231. Arc extinguishing magnet; 232. Yoke clamp; 300. Silencing pad; 301. Sub-gasket; 311. Main body; 3111. Opening; 312. First extension; 313. Guide slope; 314. Second extension; 315. Third extension; 316. Avoidance groove; 317. Raised structure; 3171. Raised rib; 400. Glue layer; S. Fixing area; P. Second glue storage space. DETAILED DESCRIPTION

[0061] 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.

[0062] 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.

[0063] 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 from 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 appreciated that the relays in Figures 1 to 3 are shown with two static contacts 212, but are not limited thereto.

[0064] As an example, referring again to the structure shown in FIG1 , the housing 100 includes a first housing 110 and a second housing 120. The second housing 120 is fixed relative to the first housing 110, exemplarily by a snap-fit ​​connection, to form a chamber for accommodating the sealing unit 210, the electromagnet unit 220, and the arc extinguishing unit 230. Of course, the second housing 120 and the first housing 110 can also be fixed by glue dispensing or interference fit, which will not be described in detail.

[0065] In addition, it is worth noting that the structure of the first shell 110 and the second shell 120 is not limited to that shown in Figure 1. One of the first shell 110 and the second shell 120 can be a cover structure, and the other can be a cover plate. The specific settings can be made according to needs and will not be repeated here.

[0066] 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.

[0067] Exemplarily, the insulating cover 211 is a ceramic cover. Furthermore, it is worth noting that the ends of the movable contact piece 213 can contact or separate from the stationary contact 212. The ends of the movable contact piece 213 and the two stationary contacts 212 form the main contacts of the relay. It is understood that the portion of the movable contact piece 213 that contacts or separates from the stationary contact 212 forms the contact portion of the main contacts.

[0068] 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 .

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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 .

[0075] It is understandable that the support rod 2153 reciprocates under the driving action of the electromagnet unit 220 , and 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 .

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] Continuing to refer to Figure 4, before the relay is disconnected, the main contacts are in a closed state, the moving iron core 010 and the static iron core 09 are in a closed state, the elastic member 05 is compressed, and the reset member 011 is also compressed, storing potential energy. When the coil 08 inside the relay is de-energized, 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 iron 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 "release noise" generated by the collision of the push rod module 06 and the yoke iron plate 07 (or other stop member) is relatively large.

[0081] In addition, during the on-off process of the relay, other components may collide with each other and generate noise.

[0082] Figure 4 also illustrates possible propagation paths for noise within the relay. The noise generated by impacting the yoke plate 07 can propagate within the contact chamber along the path shown in Figure 4, as shown by path a. This noise is transmitted through the internal gas to the insulating cover 02 (without the rubber gasket), and then to the housing 01. Alternatively, the noise within the relay can travel along the solid body, as shown in Figure 4, along the yoke plate 07, the insulating cover 02, and finally to the housing 01.

[0083] It will be understood that the above examples are intended to introduce locations where noise may occur in the relay.

[0084] Continuing with the structures shown in Figures 1 to 3, 5, and 6, the relay provided in the embodiments of the present disclosure includes a first housing 110, an insulating cover 211, and a sound-absorbing pad 300. The first housing 110 is located on one side of the insulating cover 211. The insulating cover 211 is used to cover the contact portion of the main contacts. A fixed area S is defined between the first housing 110 and the insulating cover 211, and the sound-absorbing pad 300 is disposed within at least a portion of the fixed area S. It will be appreciated that the sound-absorbing pad 300 may be located in all or part of the fixed area S.

[0085] It should be noted that in the relay provided by the embodiment of the present disclosure, the insulating cover 211 and the first shell 110 are fixed by the fixing area S, which can reduce or even prevent the shaking of the insulating cover 211 relative to the first shell 110, thereby reducing the noise generated in the relay. At the same time, the relay provided by the embodiment of the present disclosure is provided with a sound-absorbing pad 300 between the insulating cover 211 and the first shell 110. The sound-absorbing pad 300 is placed on the noise propagation path and can perform flexible damping to absorb vibrations to achieve a noise reduction effect, thereby reducing the noise transmitted from the top of the relay to the outside and improving the user experience. In addition, since the sound-absorbing pad 300 has a certain elasticity, the sound-absorbing pad 300 can also play a buffering role to reduce the shock of the internal structural parts of the relay and improve the structural performance of the relay.

[0086] At the same time, the muffler pad 300 in the fixed area S is in a fixed state. This structural setting can prevent the muffler pad 300 from shaking in the relay, so that the muffler pad 300 can better play the noise reduction, shock absorption and buffering functions.

[0087] In one embodiment, an adhesive layer 400 is provided within the fixing area S. When securing the first housing 110 and the insulating cover 211, the first housing 110 and the insulating cover 211 are preferably fixedly connected via the adhesive layer 400 (i.e., the adhesive layer 400 is provided within the fixing area S). In this case, the fixing area S can be understood as an adhesive fixing area. The adhesive bonding process is simple and easy to operate, and the adhesive has strong adhesion, enabling reliable and stable bonding of the parts and components it contacts.

[0088] Of course, other fixing forms may be used between the first shell 110 and the insulating cover 211 . For example, the fixing areas S of the first shell 110 and the insulating cover 211 may be fixedly connected by interference fit.

[0089] 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 first housing 110 and the insulating cover 211. After the glue solidifies, the adhesive layer 400 shown in Figure 5 is formed. The adhesive layer 400 can bond and fix the first housing 110 and the insulating cover 211.

[0090] It is worth noting that the sealing unit 210 in the insulating cover 211 provided in the embodiment of the present disclosure effectively seals the internal structural components through its own structure. Therefore, when glue is applied between the first housing 110 and the insulating cover 211, the adhesive layer 400 formed after the glue application primarily secures the first housing 110 and the insulating cover 211. Of course, this adhesive layer 400 also provides a certain sealing effect, which will not be further described.

[0091] As an example, the fixing area S is shown in FIG6 , where the first housing 110 and the insulating cover 211 are connected via an adhesive layer 400 disposed within the fixing area S. A sound-absorbing pad 300 is disposed within at least a portion of the fixing area S. It should be understood that the fixing area S refers to the area between the first housing 110 and the insulating cover 211 that can be glued and fixed, and is not limited to the area shown in FIG6 .

[0092] After dispensing glue between the first housing 110 and the insulating cover 211, the resulting cured glue layer 400 may create a noise transmission path between the first housing 110 and the insulating cover 211. When the sound-absorbing pad 300 is positioned in the fixing area S, it is effectively placed in the solid propagation path of the noise, thereby better facilitating its cushioning, vibration absorption, and sound insulation and reduction functions.

[0093] In one embodiment, as shown in Figures 21 and 22, the first housing 110 and the muffler pad 300 are integrally formed to reduce the number of components within the relay, reduce the number of glue dispensing steps, and reduce assembly difficulty. Specifically, the first housing 110 and the muffler pad 300 can be integrally formed using an injection molding process.

[0094] In this embodiment, the sound-absorbing pad 300 and the insulating cover 211 are bonded together by an adhesive layer 400, effectively fixing the relative positions of the first housing 110 and the insulating cover 211. It should be understood that when assembling the relay, only the insulating cover 211 and the first housing 110 need to be glued, which can reduce the number of glue steps and ease assembly difficulty.

[0095] In another embodiment, the first housing 110 and the sound-absorbing pad 300 are separate structures, and the insulating cover 211 and the sound-absorbing pad 300 are bonded by an adhesive layer 400. The first housing 110 and the sound-absorbing pad 300 are also bonded by an adhesive layer 400. Adhesive bonding is simple to produce and easy to operate, and the adhesive has strong adhesive force, which can reliably and stably bond the parts and components it contacts.

[0096] It should be noted that in the above two embodiments, when the sound-absorbing pad 300 is fixed to the first shell 110 and the insulating cover 211, not only can the noise reduction ability of the sound-absorbing pad 300 be improved, but the withstand voltage insulation ability of the relay can also be improved. Specifically, because the sound-absorbing pad 300 is placed between the first shell 110 and the insulating cover 211, and the sound-absorbing pad 300 is effectively fixed to the first shell 110 and the insulating cover 211 (by gluing or integrally forming), it is not easy for a gap to form between the insulating cover 211 and the first shell 110, and thus it will not cause electricity to "climb" through the gap and affect the withstand voltage insulation between the main contacts.

[0097] Of course, when the sound-absorbing pad 300 is connected to both the first shell 110 and the insulating cover 211 via the adhesive layer 400, the adhesive layer 400 formed between the insulating cover 211 or the first shell 110 and the sound-absorbing pad 300 is the adhesive layer 400 used to connect the first shell 110 and the insulating cover 211. Similarly, when the sound-absorbing pad 300 and the first shell 110 are integrally formed, if the sound-absorbing pad 300 and the insulating cover 211 are connected via the adhesive layer 400, the adhesive layer 400 is the adhesive layer 400 used to connect the first shell 110 and the insulating cover 211.

[0098] In one embodiment, as shown in Figures 1 and 3, the first housing 110 is provided with an exposure hole 111; the relay further includes a static contact 212, which is fixed relative to the insulating cover 211, and the static contact 212 extends from one side of the insulating cover 211 away from the first housing 110 to the other side and is exposed by the exposure hole 111.

[0099] In conjunction with the structure of the first housing 110 and the insulating cover 211, in one embodiment, as shown in Figures 7 to 10, a sound-absorbing pad 300 is located between the side of the first housing 110 where the exposure hole 111 is provided and the insulating cover 211. The sound-absorbing pad 300 includes a body 311 having an opening 3111. The static contact 212 is positioned within the corresponding opening 3111 and extends through the opening 3111 into the exposure hole 111. It is understood that the sound-absorbing pad 300 can be understood as a sound-absorbing structure in the top area of ​​the relay.

[0100] It should be noted that, considering the noise propagation path, the noise-absorbing pad 300 is located within the two main noise propagation paths. The noise-absorbing pad 300 can effectively absorb the noise inside the relay to reduce the noise transmitted from the top of the relay to the outside.

[0101] When the noise-absorbing pad 300 is set, the noise-absorbing pad 300 is bonded to the insulating cover 211 and the noise-absorbing pad 300 is bonded to the first shell 110 to improve the stability of the noise-absorbing pad 300 inside the relay, and to improve the stability between the first shell 110, the insulating cover 211 and the noise-absorbing pad 300 to reduce noise.

[0102] In one embodiment, as shown in the structure of Figures 7 to 10, the sound-absorbing pad 300 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 static contact 212.

[0103] It should be noted that when the silencer pad 300 is bonded to the insulating cover 211, glue is dispensed on the surface of the insulating cover 211. Afterwards, the silencer pad 300 is assembled. At this point, the uncured glue layer 400 may extend along the gap between the static contact 212 and the opening 3111, away from the insulating cover 211. In this embodiment, at least a portion of the first extension 312 is disposed between the exposure hole 111 and the static contact 212. This structural arrangement primarily prevents the glue layer 400 from overflowing, serves as a glue barrier, and even provides insulation and withstand voltage.

[0104] Specifically, when both sides of the sound-absorbing pad 300 are bonded with adhesive layers 400, and the two adhesive layers 400 are connected by overflowing glue, a solid noise transmission path is formed after the two adhesive layers 400 are connected. The noise can then propagate outward through this path, affecting the noise reduction effect. Accordingly, the provision of the first extension portion 312 prevents overflow of the adhesive layers 400, thus preventing the formation of a solid noise transmission path after the two adhesive layers 400 are connected, thereby ensuring that the sound-absorbing pad 300 effectively performs its cushioning, soundproofing, and noise reduction functions.

[0105] 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 also be increased, thereby playing an insulating and voltage-resistant role.

[0106] In one embodiment, the muffler pad 300 forms a first glue storage space on a side facing the insulation cover 211 , together with the sidewall of the static contact 212 and the insulation cover 211 . The first glue storage space is used to fill the glue layer 400 .

[0107] It should be noted that in this embodiment, the insulating cover 211 and the sound-absorbing pad 300 are designed with a "glue storage" structure. The first glue storage space is used to fill with glue, which can ensure that the sound-absorbing pad 300 and the insulating cover 211 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 and the sound-absorbing pad 300 and the insulating cover 211 are assembled, the glue can be "squeezed" into the first glue storage space (as shown by the black filling in Figure 11). 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.

[0108] At the same time, the first adhesive storage space can also improve the bonding strength between the noise reduction pad 300 and the insulation cover 211, thereby improving the stability of related structural parts in the relay.

[0109] In a specific embodiment, as shown in FIG10 , the muffler pad 300 is provided with a guide slope 313 around the static contact 212. 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.

[0110] It should be noted that the guide slope 313 provided on the muffler pad 300 is used to cooperate with the insulating cover 211 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 insulating cover 211 and smaller on the side farther away from the insulating cover 211. This reserves more adhesive storage space and facilitates the filling of the adhesive layer 400 into the first adhesive storage space.

[0111] In addition, the guide slope 313 can also play a guiding role during assembly, so as to facilitate the assembly of the noise reduction pad 300 and the static contact 212.

[0112] Of course, the inner surface of the sound-absorbing pad 300 is not limited to being set as the guide slope 313 shown in Figure 10, and can also be set as other types according to needs, which will not be described in detail.

[0113] In one embodiment, as shown in Figures 7 to 10, the sound-absorbing pad 300 further includes a second extension portion 314. The second extension portion 314 and the first extension portion 312 are located on the same side of the main body portion 311. The second extension portion 314 is located on a side of the first extension portion 312 facing away from the static contact 212 and is spaced apart from the first extension portion 312. A second adhesive storage space P is formed between the second extension portion 314, the first extension portion 312, and the inner wall of the first housing 110. Exemplarily, the second adhesive storage space P is shown in the form of an adhesive storage ring.

[0114] As shown in Figures 7 and 10 , this second glue storage space P is used to fill with glue, ensuring that the connection between the muffler pad 300 and the first housing 110 forms an insulating wall, thereby ensuring the creepage distance. Furthermore, after the muffler pad 300 is assembled with the first housing 110 and the glue cures, the first housing 110 and the muffler pad 300 are securely connected by the adhesive layer 400, which improves the stability of the relevant structural components within the relay, prevents the insulating cover 211 from shaking within the first housing 110, and reduces noise.

[0115] Alternatively, as shown in Figures 21 and 22, the second adhesive space P is used to fill the plastic of the first housing 110, which is integrally injection-molded with the sound-absorbing pad 300. The second adhesive space P facilitates the filling of the plastic of the first housing 110, ensuring that the sound-absorbing pad 300 and the first housing 110 are connected to form an insulating wall, thereby ensuring the creepage distance therebetween.

[0116] 11 , the second extension portion 314 abuts against the inner wall of the first housing 110 facing the insulating cover 211. Specifically, the second extension portion 314 abuts against the top wall of the first housing 110 to prevent glue from overflowing from the second glue storage space P.

[0117] In one embodiment, as shown in Figures 7 to 10 , the sound-absorbing pad 300 further includes a third extension 315. This third extension 315 is located on the side of the main body 311 facing away from the exposure hole 111 of the first shell 110, and abuts the outer wall of the insulating cover 211. This third extension 315 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 third extension 315 can be positioned as needed.

[0118] 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 sound-absorbing pad 300 shown in FIG. 10 are schematically separated by dotted lines, but the present invention is not limited thereto.

[0119] If other structures protrude from the top of the insulating cover 211, as shown in Figure 12, a relief portion (not shown in Figures 7 to 10) must be provided on the muffler pad 300 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.

[0120] 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. 12 .

[0121] When the avoidance portion is specifically set, the avoidance portion has various structural forms. Exemplarily, the avoidance portion can be a avoidance through-hole or a avoidance groove 316 as shown in FIG8 . In a specific embodiment, when the avoidance portion is a avoidance through-hole, the avoidance through-hole can penetrate the main body 311 along the thickness direction of the main body 311. In another specific embodiment, the avoidance portion can be a avoidance groove 316, and the opening of the avoidance groove 316 faces the insulating cover 211. It should be understood that since the thickness of the main body 311 of the sound-absorbing pad 300 is limited, a raised structure 317 is formed on the side of the main body 311 away from the insulating cover 211 at the position corresponding to the avoidance groove 316. The surface of the raised structure 317 can be provided with a rib 3171 as shown in FIG7 and FIG9 , or there can be no rib 3171 as shown in FIG13 to FIG16 . The structure of the rib 3171 can be configured as required. For example, it can be in a corrugated shape as shown in FIG. 7 or FIG. 9 , or in a dispersed dot shape.

[0122] When the silencer pad 300 is bonded to the housing 100 through the adhesive layer 400, the surface of the raised structure 317 may or may not be glued. When glued, the bonding force can be increased and the creepage insulation capability can be enhanced. When glued, the raised structure 317 can be interference fit with the first housing 110 and the relay part. This interference fit is conducive to enhancing the creepage insulation capability between the static contacts 212. In addition, when the surface of the raised structure 317 is provided with a corrugated rib 3171, the rib 3171 is more easily deformed at the corrugation to absorb the interference, which is more conducive to assembly.

[0123] When the housing 100 and the sound-absorbing pad 300 are integrally formed, the rib 3171 increases the injection molding contact area and improves the bonding strength between the integrally formed sound-absorbing pad 300 and the housing 100 .

[0124] It is worth noting that a rib 3171 may also be provided on the side of the muffler pad 300 facing the insulating cover 211. Specifically, the muffler pad 300 may have an interference fit rib 3171 provided between the two static contacts 212 on the side facing the insulating cover 211 to cooperate with the top surface of the insulating cover 211 and enhance the creepage insulation capability between the static contacts 212.

[0125] In addition, when the avoidance portion is an avoidance groove 316 , as shown in FIG. 17 to FIG. 20 , 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 .

[0126] 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.

[0127] It's worth noting that the aforementioned figures all depict the muffler pad 300 as a single piece. Of course, the muffler pad 300 can also include multiple sub-gaskets 301, with the multiple sub-gaskets 301 spaced apart to reduce assembly difficulty and effectively utilize space within the relay. For example, as shown in Figures 23 and 24 , when there are two static contacts 212 within the relay, the muffler pad 300 can include two sub-gaskets 301, each with an opening 3111 to facilitate assembly between the sub-gasket 301 and the static contact 212.

[0128] When the sub-gasket 301 is specifically provided, a first extension portion 312 , a guide slope 313 , a second extension portion 314 and a third extension portion 315 may be provided on the sub-gasket 301 as required, and details thereof will not be repeated.

[0129] 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 FIG25 , the number of static contacts 212 within the relay is four. Accordingly, as shown in FIG26 , the silencer pad 300 within the relay can be provided with four openings 3111 corresponding to the corresponding static contacts 212.

[0130] It can be understood that the sound-absorbing pad 300 in Figure 26 is an integrated structure. Of course, the sound-absorbing pad 300 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.

[0131] Furthermore, the aforementioned sound-absorbing pad 300 can have a multi-layer structure or a single-layer structure. For example, taking the example of a sound-absorbing pad 300 comprising multiple stacked sound-absorbing layers, adjacent sound-absorbing layers can be fixed (e.g., bonded), with the top sound-absorbing layer of the multi-layer sound-absorbing layer bonded to the first shell 110, and the bottom sound-absorbing layer of the multi-layer sound-absorbing layer bonded to the insulating cover 211.

[0132] It is worth noting that the above-mentioned sound-absorbing pad 300 can be made of elastic materials such as synthetic rubber, synthetic silicone rubber, synthetic resin, sponge gasket and polyurethane.

[0133] Continuing with Figures 1 and 3 , the second housing 120 of the relay provided in the embodiments of the present disclosure is fixed relative to the first housing 110. When specifically configuring the internal structure of the relay, the second housing 120 can also be configured to be fixed to other components within the relay. If the fixing area S between the first housing 110 and the insulating cover 211 is defined as being located at the top of the relay, the fixing location between the second housing 120 and other components within the relay can be located at the bottom or side of the relay.

[0134] Several specific application examples are now provided in combination with the first housing 110 and the second housing 120 .

[0135] Example 1: Set up an independent noise-absorbing pad 300, fix the noise-absorbing pad 300 to the first shell 110 and the insulating cover 211 respectively (for example, by gluing), and fix the second shell 120 to other structural parts in the relay (for example, the U-shaped yoke 226) at the bottom by gluing.

[0136] In a specific embodiment, the relay provided by the embodiment of the present disclosure is provided with a sound-absorbing pad 300. The sound-absorbing pad 300 is placed on top of the insulating cover 211, and the sound-absorbing pad 300 is fixed to the first housing 110 and the insulating cover 211 by glue, and the second housing 120 is fixed to the U-shaped yoke 226 by glue.

[0137] It should be noted that this example has the following advantages: 1. The upper and lower sides facilitate assembly operations; 2. Both the upper and lower sides can be fixed, and the first shell 110 and the insulating cover 211 are already structurally stable, eliminating the need for glue fixation on the left and right sides. In this case, a gap is provided between the outer shell 100 and the insulating cover 211, so noise propagates through the air. Air propagation is slower than solid propagation and has less propagation energy. Therefore, this layout can also reduce the transmission of internal noise to the outside.

[0138] Example 2: The silencer pad 300 is integrated with the first shell 110, and the silencer pad 300 is fixed to the insulating cover 211 (for example, by gluing), and the second shell 120 is fixed to other structural parts in the relay (for example, the U-shaped yoke 226) at the bottom by glue.

[0139] Example 3: Install a separate sound-absorbing pad 300, secure it to the first housing 110 and the insulating cover 211 (e.g., by gluing), and secure the second housing 120 to other components within the relay (e.g., the U-shaped yoke 226) by glue on the sides. It is understood that the glue placement on these sides depends on the structure of the U-shaped yoke 226, and can be applied all around the entire circumference or only on two opposing sides. The details are omitted here.

[0140] Example 4: The noise-absorbing pad 300 is integrated with the first shell 110, and the noise-absorbing pad 300 is fixed to the insulating cover 211 (for example, by gluing), and the second shell 120 is fixed to other structural parts in the relay (for example, the U-shaped yoke 226) by gluing on the side.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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: A first shell, an insulating cover and a sound-absorbing pad; the first shell is located on one side of the insulating cover; The insulating cover is used to cover the contact part of the main contact; A fixing area is provided between the first shell and the insulating cover, and a sound-absorbing pad is provided in at least a portion of the fixing area.

2. The relay according to claim 1, wherein: An adhesive layer is provided in the fixing area.

3. The relay according to claim 2, characterized in that The first shell and the sound-absorbing pad are an integrally formed structure, and the sound-absorbing pad and the insulating cover are bonded together by the adhesive layer.

4. The relay according to claim 2, characterized in that The first shell and the sound-absorbing pad are split structures, and the insulating cover and the sound-absorbing pad are bonded together by the adhesive layer. The first shell and the sound-absorbing pad are bonded together by the adhesive layer.

5. The relay according to any one of claims 2 to 4, characterized in that: The first shell is provided with an exposure hole; the relay further comprises a static contact, which is fixed relative to the insulating cover and extends from one side of the insulating cover away from the first shell to the other side and is exposed by the exposure hole.

6. The relay according to claim 5, characterized in that The sound-absorbing pad is located between the side of the first shell where the exposure hole is set and the insulating cover; the sound-absorbing pad includes a main body, the main body is provided with an opening, and the static contact extends into the exposure hole through the corresponding opening.

7. The relay according to claim 6, characterized in that The noise-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 static contact.

8. The relay according to claim 7, characterized in that The muffler pad forms a first glue storage space on a side facing the insulating cover together with the side wall of the static contact and the static contact, and the first glue storage space is used to fill the glue layer.

9. The relay according to claim 8, characterized in that The noise-absorbing pad is provided with a guide slope around the static contact; along the direction in which the static contact approaches the exposure hole, the distance between the guide slope and the static contact gradually decreases.

10. The relay according to claim 7, wherein: The sound-absorbing pad also includes a second 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 static contact, and is spaced apart from the first extension portion. A second glue storage space is formed between the second extension portion, the first extension portion and the inner wall of the first shell.

11. The relay according to claim 10, characterized in that The second extension portion abuts against an inner wall of the first shell facing the insulation cover.

12. The relay according to claim 6, characterized in that The sound-absorbing pad further includes a third extending portion, which is located on a side of the main body facing away from the first shell where the exposure hole is provided, and the third extending portion abuts against an outer wall of the insulating cover.

13. The relay according to claim 6, characterized in that The sound-absorbing pad is provided with an avoidance portion.

14. The relay according to claim 13, characterized in that The avoidance portion is a avoidance through hole.

15. The relay according to claim 13, wherein: The avoidance portion is a avoidance groove, and the avoidance groove is recessed from the main body toward one side surface of the insulation cover in a direction away from the insulation cover.

16. The relay according to claim 15, characterized in that On the side of the main body away from the insulating cover, a protruding structure is formed on the main body at a position corresponding to the avoidance groove, and a convex rib is provided on the protruding structure.

17. The relay according to any one of claims 1 to 4, characterized in that: The sound-absorbing pad includes a plurality of sub-gaskets, and the plurality of sub-gaskets are arranged at intervals.

18. The relay according to claim 5, characterized in that The relay further includes a moving contact piece and an elastic member, wherein the moving contact piece is placed in the insulating cover and can move relative to the static contact to contact or separate with the static contact; the portion where the static contact and the moving contact piece contact and cooperate form the contact portion of the main contact; and the elastic member is placed on the side of the moving contact piece facing away from the static contact to provide pressure for the contact between the moving contact piece and the static contact.

19. The relay according to any one of claims 1 to 4, characterized in that: The relay further includes a second housing fixed relative to the first housing to form a chamber for accommodating the insulating cover.

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