Relay

Abstract

The utility model relates to the technical field of electronic control devices, in particular to a relay. The relay comprises a first shell, an insulating cover and a silencing pad, the first shell is positioned on one side of the insulating cover; the insulating cover is used for covering the contact part of the main contact; a fixing area is arranged between the first shell and the insulating cover, and a silencing pad is arranged in at least part of the fixing area. By optimizing the structure of the relay, noise transmitted from the top of the relay to the outer side can be reduced, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic control devices, in particular to a relay. Background Art

[0002] As a special type of relay, high-voltage DC relay is mainly used in electric vehicles to control the charging and discharging of batteries.

[0003] When the relay is actually used, 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 and generate noise.

[0004] 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 and the noise to be lower than 60dB to avoid causing noise experience to users.

[0005] Therefore, there is an urgent need to provide a relay that can reduce noise. Utility Model Content

[0006] An embodiment of the present application provides a relay, which can reduce the noise transmitted from the top of the relay to the outside by optimizing its own structure, thereby improving user experience.

[0007] An embodiment of the present application 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 part 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.

[0008] According to some embodiments of the utility model, a glue layer is provided in the fixing area.

[0009] According to some embodiments of the utility model, 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.

[0010] According to some embodiments of the utility model, the first shell and the sound-absorbing pad are split structures, and the insulating cover and the sound-absorbing pad are bonded by the adhesive layer, and the first shell and the sound-absorbing pad are bonded by the adhesive layer.

[0011] According to some embodiments of the utility model, 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 protrudes from one side of the insulating cover away from the first shell to the other side and is exposed by the exposure hole.

[0012] According to some embodiments of the utility model, the sound-absorbing pad is located between a 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, the static contact is placed in the opening corresponding to it, and probes into the exposure hole through the opening.

[0013] According to some embodiments of the utility model, 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.

[0014] According to some embodiments of the utility model, the muffler pad forms a first glue storage space with the side wall of the static contact and the static contact on the side facing the insulating cover, and the first glue storage space is used to fill the glue layer.

[0015] According to some embodiments of the utility model, the noise-absorbing pad is provided with a guide slope around the static contact; along the direction of the static contact approaching the exposure hole, the distance between the guide slope and the static contact gradually decreases.

[0016] According to some embodiments of the utility model, 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, and a second glue storage space is formed between the second extension portion, the first extension portion and the inner wall of the first shell.

[0017] According to some embodiments of the utility model, the second extension portion abuts against an inner wall of one side of the first shell facing the insulating cover.

[0018] According to some embodiments of the utility model, the sound-absorbing pad further includes a third extension portion, the third extension portion is located on a side of the main body portion 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.

[0019] According to some embodiments of the utility model, the sound-absorbing pad is provided with an avoidance portion.

[0020] According to some embodiments of the utility model, the avoidance portion is an avoidance through hole.

[0021] According to some embodiments of the utility model, the avoidance portion is an avoidance groove, and the avoidance groove is recessed from the main body toward a side surface of the insulation cover in a direction away from the insulation cover.

[0022] According to some embodiments of the utility model, on the side of the main body away from the insulating cover, the main body forms a protruding structure at a position corresponding to the avoidance groove, and a convex rib is provided on the protruding structure.

[0023] According to some embodiments of the utility model, the sound-absorbing pad includes a plurality of sub-gaskets, and the plurality of sub-gaskets are arranged at intervals.

[0024] According to some embodiments of the utility model, the relay also 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 the static contact; the static contact cooperates with the moving contact piece to form 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.

[0025] According to some embodiments of the utility model, the relay further includes a second housing, and the second housing is fixed relative to the first housing to form a chamber for accommodating the insulating cover.

[0026] One embodiment of the above utility model has at least the following advantages or beneficial effects:

[0027] 1. In the relay provided by the present application, the insulating cover and the first housing are fixed by a fixing area, which can reduce or even prevent the shaking of the insulating cover relative to the first housing to reduce the noise generated in the relay. At the same time, the relay provided by the present application is provided with a silencer pad between the insulating cover and the first housing. The silencer pad 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 silencer pad has a certain elasticity, the silencer pad 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.

[0028] At the same time, the muffler pad in the fixed area is in a fixed state. This structural setting can prevent the muffler pad from shaking in the relay, so that the muffler pad can better play the noise reduction, shock absorption and buffering functions.

[0029] 2. In the relay provided by the present application, the first housing and the insulating cover are bonded by the adhesive layer in the adhesive fixing area, which can improve the stability of the structure after the first housing and the insulating cover are fixed, so as to avoid the insulating cover from shaking relative to the first housing, and reduce noise. The adhesive production process is simple and easy to operate, and the adhesive has strong adhesion, and can reliably and stably bond the parts and components it contacts. Moreover, when the silencer pad is set in the fixed area, the silencer pad is equivalent to being placed on the solid propagation path of the noise, which can better play the role of buffering, vibration absorption, and sound insulation and noise reduction.

[0030] 3. In the relay provided by the present application, at least part of the first extension portion 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 an insulating and withstand voltage role. Specifically, when both sides of the silencer pad are bonded with glue layers, and the two glue layers are connected by the overflowing 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, reducing the noise reduction effect. Accordingly, by setting the first extension portion, 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 buffering, sound insulation and noise reduction role. At the same time, when the distance between the first extension portion and the static contact is larger, after filling with glue, the creepage gap between the main contacts can also be increased to play an insulating and withstand voltage role.

[0031] 4. The relay provided in the present application has a "glue storage" structure design for the insulating cover and the silencer pad. The first glue storage space is conducive to the filling of 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.

[0032] 5. In the relay provided by the present application, the muffler pad is provided with a second glue storage space, which is conducive to the filling of glue forming a glue layer or plastic of the first shell integrally injection-molded with the muffler pad, and can ensure that the second muffler pad is connected to the first shell to form an insulating wall, thereby ensuring the creepage distance here. In addition, after the muffler pad is assembled with the first shell and the glue is cured, the first shell and the muffler pad are fixedly connected by the glue layer, which can improve the stability of related structural parts in the relay, ensure that the insulating cover does not shake in the first shell, and reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Shown is an exploded schematic diagram of a relay provided by an embodiment of the utility model;

[0034] Figure 2 It is shown that Figure 1 Schematic diagram of the three-dimensional structure of the middle sealing unit;

[0035] Figure 3 It is shown that Figure 1 Schematic diagram of the cross section of the structure;

[0036] Figure 4 Shown is a cross-sectional schematic diagram of a relay in the related art;

[0037] Figure 5 It is shown that Figure 3 A schematic cross-sectional view of the structure in the middle;

[0038] Figure 6 It is shown that Figure 3 Another schematic cross-sectional view of the middle structure;

[0039] Figure 7 It is shown that Figure 1 A schematic diagram of the first three-dimensional structure of the middle sound-absorbing pad;

[0040] Figure 8 It is shown that Figure 7 A first plan view of the middle sound-absorbing pad;

[0041] Fig. 9 It is shown that Figure 7 Second plan view of the middle sound-absorbing pad;

[0042] Fig.10 It is shown that Fig. 9 Schematic diagram of the cross section at AA in the middle;

[0043] Fig.11 It is shown that Figure 7 A schematic cross-sectional view of a middle sound-absorbing pad being assembled on the surface of an insulating cover;

[0044] Fig.12 What is shown is a three-dimensional structural schematic diagram of another sealing unit in a relay provided by an embodiment of the utility model;

[0045] Fig.13 The figure shows a second three-dimensional structural diagram of a noise-absorbing pad in a relay provided by an embodiment of the utility model;

[0046] Fig.14 It is shown that Fig.13 A first plan view of the middle sound-absorbing pad;

[0047] Fig.15 It is shown that Fig.13 Second plan view of the middle sound-absorbing pad;

[0048] Fig.16 It is shown that Fig.15 Schematic diagram of the cross section at BB;

[0049] Fig.17 The third stereoscopic structural diagram of the silencer pad in the relay provided by the embodiment of the utility model is shown;

[0050] Fig.18 It is shown that Fig.17 A first plan view of the middle sound-absorbing pad;

[0051] Fig.19 It is shown that Fig.17 Second plan view of the middle sound-absorbing pad;

[0052] Fig. 20 It is shown that Fig.19 Schematic diagram of the cross section at CC;

[0053] Fig.21 It is shown that Figure 1 A schematic cross-sectional view of a middle sound-absorbing pad and a first shell being integrally provided;

[0054] Fig. 22 It is shown that Fig.21 Schematic diagram of the cross section of the structure after assembly;

[0055] Fig.23 The fourth structural schematic diagram of the noise-reducing pad in the relay provided by the embodiment of the utility model is shown;

[0056] Fig.24 It is shown that Fig.23 Sectional view at DD in the middle;

[0057] Fig.25 Shown is a top view of a second structure of a relay provided by an embodiment of the utility model;

[0058] Fig.26 The corresponding Fig.25 Schematic diagram of the structure of the silencer pad of the relay.

[0059] The following are the descriptions of the reference numerals:

[0060] Related technologies: 01, housing; 02, insulation cover; 03, static contact; 04, moving contact piece; 05, elastic member; 06, push rod module; 07, yoke iron plate; 08, coil; 09, static iron core; 010, moving iron core; 011, reset member; 012, U-shaped yoke iron;

[0061] This application: 100, housing; 110, first housing; 111, exposure hole; 120, second housing; 200, main assembly; 210, sealing unit; 211, insulation cover; 212, static contact; 213, moving contact piece; 214, elastic member; 215, push rod module; 2151, bracket; 2152, support seat; 2153, 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; 230, arc extinguishing unit; 231, arc extinguishing magnet; 232, yoke clamp; 300, silencer; 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, convex rib; 400, glue layer; S, fixed area; P, second glue storage space. DETAILED DESCRIPTION

[0062] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0063] Figure 1 Shown is an exploded schematic diagram of a relay provided by an embodiment of the utility model; Figure 2 It is shown that Figure 1 A schematic diagram of the three-dimensional structure of the middle sealing unit 210; Figure 3 It is shown that Figure 1 Schematic diagram of the cross section of the structure. Please refer to Figures 1 to 3 As shown in the structure, the relay includes a housing 100 and a main body assembly 200 for realizing load switching.

[0064] 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 in 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 in the housing 100. It can be understood that Figures 1 to 3 The relay in FIG. 1 is shown as having two static contacts 212 by way of example, but is not limited thereto.

[0065] As an example, please refer to Figure 1In the structure shown, the housing 100 includes a first housing 110 and a second housing 120, and the second housing 120 is fixed relative to the first housing 110, and can be exemplarily snap-fitted 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, and the details are not repeated here.

[0066] In addition, it is worth noting that the structures of the first shell 110 and the second shell 120 are not limited to Figure 1 As shown, 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 may be based on the requirements and will not be described in detail here.

[0067] like Figures 1 to 3 As shown, the sealing unit 210 includes an insulating cover 211, a static contact 212, a moving contact piece 213 and an elastic member 214, wherein the moving contact piece 213 is placed in the insulating cover 211, and its two ends can move relative to the static contact 212 to contact or separate 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 moving contact piece 213 protrudes 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 moving contact piece 213 facing away from the static contact 212, so as to provide pressure for the contact between the moving contact piece 213 and the static contact 212.

[0068] Exemplarily, the insulating cover 211 is a ceramic cover. In addition, it is worth noting that the moving contact piece 213 can contact or separate the static contact 212, and the main contact of the relay is formed therebetween. It is understandable that the part of the moving contact piece 213 and the static contact 212 used for contacting or separating forms the contact part of the main contact.

[0069] The arc extinguishing unit 230 is used to extinguish the arc generated between the stationary contact 212 and the moving contact piece 213 of the sealing unit 210 .

[0070] As an example, the arc extinguishing unit 230 includes two arc extinguishing magnets 231. The arc extinguishing magnets 231 may be permanent magnets, and each arc extinguishing magnet 231 may be substantially rectangular. The two arc extinguishing magnets 231 are respectively disposed on both sides of the insulating cover 211 and are disposed opposite to each other along the length direction of the moving contact piece 213.

[0071] It should be noted that by providing two arc-extinguishing magnets 231 disposed opposite to each other, a magnetic field can be formed around the stationary contact 212 and the movable contact piece 213. Therefore, the arc generated between the stationary contact 212 and the movable contact piece 213 is stretched in a direction away from each other by the action of the magnetic field, thereby achieving arc extinguishing.

[0072] The arc extinguishing unit 230 also includes two yoke iron clips 232, and the two yoke iron clips 232 are arranged corresponding to the positions of the two arc extinguishing magnetic steels 231. In addition, the two yoke iron clips 232 surround the sealing unit 210 and the two arc extinguishing magnetic steels 231. By designing that the yoke iron clips 232 surround the arc extinguishing magnetic steels 231, it is possible to prevent the magnetic field generated by the arc extinguishing magnetic steels 231 from spreading outward and affecting the arc extinguishing effect. The yoke iron clips 232 are made of soft magnetic material. The soft magnetic material may include but is not limited to iron, cobalt, nickel, and alloys thereof.

[0073] Please continue to refer to Figure 1 and Figure 3 In the structure shown, the sealing unit 210 also includes a push rod module 215, and the push rod module 215 includes a bracket 2151, a support seat 2152 and a rod portion 2153. The bracket 2151 includes a bottom plate, and the bottom plate is located on one side of the moving contact piece 213. The elastic member 214 is placed between the bottom plate and the moving contact piece 213; the rod portion 2153 is used to drive the contact and separation of the moving contact piece 213 and the static contact 212. One axial end of the rod portion 2153 is fixed to the support seat 2152, and along the axial direction of the rod portion 2153, the bracket 2151 is fixed to the side of the support seat 2152 facing away from the rod portion 2153.

[0074] It is worth noting that along the axial direction of the rod 2153, the elastic member 214 and the movable contact piece 213 are installed on the side of the support seat 2152 facing away from the rod 2153, and the elastic member 214 and the movable contact piece 213 are installed on the bracket 2151. As an example, the bracket 2151 includes a bottom plate, a top plate and two side plates arranged opposite to each other, and along the axial direction of the rod 2153, the two side plates are located on the same side of the bottom plate; the top plate is connected to the other end of the two side plates facing away from the bottom plate to form a frame structure with the bottom plate and the two side plates; the contact spring is located in the frame structure. Of course, the structure of the bracket 2151 is not limited to this, and can be set according to needs, and the details are not repeated.

[0075] Please continue to refer to Figure 1 and Figure 3 In the structure shown, the main body assembly 200 further includes an electromagnet unit 220 , which is used to drive the rod 2153 to reciprocate so that the movable contact piece 213 moves with the rod 2153 .

[0076] It is understandable that the rod 2153 reciprocates under the driving action of the electromagnet unit 220 , so that the movable contact piece 213 moves with the rod 2153 , thereby achieving contact and separation between the movable contact piece 213 and the stationary contact 212 .

[0077] The sealing unit 210 also includes a yoke plate 216 and a metal cover 217. The insulating cover 211 is covered on one side of the yoke plate 216 to form a contact chamber. The contact chamber is used to accommodate the moving 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.

[0078] 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 in the shape of a hollow cylinder and is formed of an insulating material. The metal cover 217 is inserted into the coil frame 221. The coil 222 surrounds the coil frame 221. The static iron core 223 is fixedly arranged 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 perforation, and the perforation is arranged corresponding to the position of the through hole for the rod 2153 to pass therethrough. The moving iron core 224 is movably arranged in the metal cover 217 and is arranged opposite to the static iron core 223. The moving iron core 224 is connected to the 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 rod 2153 can be connected by screwing, riveting, welding or other methods.

[0079] The reset member 225 is located inside the metal cover 217 and is disposed between the static iron core 223 and the moving iron core 224, and is used to reset the moving 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 rod 2153.

[0080] Take the relay in the related technology as an example, Figure 4 As shown, in actual use, when the coil 08 is driven and energized, the moving iron core 010 becomes an electromagnet and quickly attracts the yoke iron plate 07 or the static iron core 09. The smaller the magnetic gap between the moving iron core 010 and the yoke iron plate 07 or the static iron core 09, the greater the attraction. During the entire power-on process, the acceleration and speed of the moving iron core 010 are constantly increasing, and the "closing noise" may be as follows: Figure 4 Mainly occurs in the middle A position.

[0081] Please continue to refer to Figure 4, and before the relay is disconnected, the main contact and the iron core are completely closed, 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 in the relay receives the 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 realizing the separation of the contacts of the relay, until the push rod module 06 hits the yoke iron plate 07 (or other stopper), and the entire movement is terminated. Due to the large energy, the push rod module 06 may collide with the yoke iron plate 07 (or other stopper) at Figure 4 The "release noise" mainly occurs in the middle B position.

[0082] In addition, during the on-off process of the relay, other components may collide with each other and generate noise.

[0083] Figure 4 The possible propagation paths of the noise in the relay are also shown. The propagation paths of the noise generated when hitting the yoke iron plate 07 in the contact chamber may be as follows: Figure 4 As shown in path a, the noise is transmitted through the internal gas to the insulating cover 02 (without rubber pad), and then to the housing 01. Alternatively, the noise inside the relay may be as follows Figure 4 As shown in the path b, the noise may be transmitted through the yoke iron plate 07, the insulating cover 02 to the housing 01.

[0084] It can be understood that the above examples are introductions to the locations where noise may occur in the relay. Of course, the relay provided in the embodiment of the present application may have very little noise, or no noise, at position A or position B, or noise may be generated at other locations, which will not be described in detail.

[0085] In view of this, please continue to refer to Figures 1 to 3 and Figure 5 as well as Figure 6 In the structure shown, the relay provided in the embodiment of the present application 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 part of the main contact; there is a fixed area S between the first housing 110 and the insulating cover 211, and the sound-absorbing pad 300 is provided in at least part of the fixed area S. It can be understood that the sound-absorbing pad 300 can be located in the entire or partial area of ​​the fixed area S.

[0086] It should be noted that in the relay provided in the embodiment of the present application, the insulating cover 211 is fixed to the first housing 110 through the fixing area S, which can reduce or even prevent the shaking of the insulating cover 211 relative to the first housing 110 to reduce the noise generated in the relay. At the same time, the relay provided in the embodiment of the present application is provided with a sound-absorbing pad 300 between the insulating cover 211 and the first housing 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, so as to reduce the noise transmitted from the top of the relay to the outside and improve 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.

[0087] 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.

[0088] In one embodiment, a glue layer 400 is provided in the fixing area S. When fixing the first shell 110 and the insulating cover 211, it is preferred that the first shell 110 and the insulating cover 211 are fixedly connected by the glue layer 400 (i.e., the glue layer 400 is provided in the fixing area S). In this case, the fixing area S can be understood as an adhesive fixing area. The adhesive production process is simple and easy to operate, and the glue has a strong adhesive force, and can reliably and stably bond the parts and components it contacts.

[0089] Of course, other fixing forms may be used between the first shell 110 and the insulating cover 211 . For example, the fixing area S of the first shell 110 and the insulating cover 211 may be fixedly connected by interference fit.

[0090] It is understandable 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 glue or pouring glue. For example, glue can be dispensed between the first shell 110 and the insulating cover 211, and after the glue is cured, a Figure 5 The adhesive layer 400 shown can bond and fix the first shell 110 and the insulating cover 211 .

[0091] It is worth noting that the sealing unit 210 in the insulating cover 211 provided in the embodiment of the present application can effectively seal the internal structural parts through its own structure. Therefore, when glue is dispensed between the first shell 110 and the insulating cover 211, the glue layer 400 formed after the glue is dispensed mainly fixes the first shell 110 and the insulating cover 211. Of course, the glue layer 400 can also bring a certain sealing effect, which will not be described in detail.

[0092] As an example, the fixed area S is as follows Figure 6 As shown, the first shell 110 and the insulating cover 211 are connected by an adhesive layer 400 disposed in the fixing area S; at least a portion of the fixing area S is provided with a sound-absorbing pad 300. It is understood that the fixing area S refers to the area between the first shell 110 and the insulating cover 211 that can be fixed by adhesive, and is not limited to Figure 6 as shown in .

[0093] When glue is dispensed between the first shell 110 and the insulating cover 211, the glue layer 400 formed after curing may form a noise transmission channel between the first shell 110 and the insulating cover 211. When the sound-absorbing pad 300 is arranged in the fixing area S, the sound-absorbing pad 300 is equivalent to being placed on the solid propagation path of the noise, which can better play the role of buffering, vibration absorption and sound insulation and noise reduction.

[0094] In one embodiment, Fig.21 and Fig. 22 As shown, the first housing 110 and the muffler pad 300 are an integrally formed structure to reduce the number of structural parts in the relay, reduce the glue dispensing steps, and reduce the difficulty of assembly. Specifically, the first housing 110 and the muffler pad 300 can be integrally formed by an injection molding process.

[0095] In this embodiment, the sound-absorbing pad 300 and the insulating cover 211 are bonded by the adhesive layer 400 to effectively fix the relative positions of the first housing 110 and the insulating cover 211. It should be understood that when assembling the relay formed by this structure, only the insulating cover 211 and the first housing 110 need to be glued, which can reduce the glue-dispensing steps and reduce the difficulty of assembly.

[0096] In another embodiment, the first shell 110 and the sound-absorbing pad 300 are split structures, and the insulating cover 211 and the sound-absorbing pad 300 are bonded by the adhesive layer 400, and the first shell 110 and the sound-absorbing pad 300 are bonded by the adhesive layer 400. The adhesive production process is simple and easy to operate, and the adhesive has a strong adhesive force, and can reliably and stably bond the parts and components it contacts.

[0097] It should be noted that in the above two embodiments, when the noise-reducing pad 300 is fixed to the first shell 110 and the insulating cover 211, not only the noise reduction capability of the noise-reducing pad 300 can be improved, but also the withstand voltage insulation capability of the relay can be improved. Specifically, since the noise-reducing pad 300 is placed between the first shell 110 and the insulating cover 211, and the noise-reducing pad 300 is effectively fixed to the first shell 110 and the insulating cover 211 (glued or integrally formed), it is not easy to form a gap between the insulating cover 211 and the first shell 110, and thus it will not cause electricity to "climb" from the gap and affect the withstand voltage insulation between the main contacts.

[0098] Of course, when the sound-absorbing pad 300 is connected to the first shell 110 and the insulating cover 211 through the adhesive layer 400, the adhesive layer 400 formed by 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 an integrally formed structure, if the sound-absorbing pad 300 and the insulating cover 211 are connected through 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.

[0099] In one embodiment, Figure 1 and Figure 3 As shown, the first housing 110 is provided with an exposure hole 111 ; the relay further comprises a static contact 212 , which is fixed relative to the insulating cover 211 and 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 .

[0100] In combination with the structure of the first housing 110 and the insulating cover 211, in one embodiment, Figures 7 to 10 In the structure shown, the muffler 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 muffler pad 300 includes a body portion 311, the body portion 311 is provided with an opening 3111, and the static contact 212 is placed in the opening 3111 corresponding thereto and penetrates into the exposure hole 111 through the opening 3111. It can be understood that the muffler pad 300 can be understood as a muffler structure in the top area of ​​the relay.

[0101] It should be noted that, in combination with the noise propagation path, the noise-absorbing pad 300 is located in two main noise propagation paths of the noise. 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.

[0102] 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, so as to improve the stability of the noise-absorbing pad 300 inside the relay, and improve the stability between the first shell 110, the insulating cover 211 and the noise-absorbing pad 300 to reduce noise.

[0103] In one embodiment, Figures 7 to 10 In the structure shown, 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 .

[0104] It should be noted that when the silencer pad 300 is bonded to the insulating cover 211, glue needs to be dispensed on the surface of the insulating cover 211, and then the silencer pad 300 is assembled. At this time, 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 part of the first extension portion 312 is arranged between the exposure hole 111 and the static contact 212. This structural arrangement can mainly prevent the glue layer 400 from overflowing, play a role in blocking glue, and even play a role in insulating voltage resistance.

[0105] Specifically, when both sides of the sound-absorbing pad 300 are bonded with the adhesive layer 400, and the two adhesive layers 400 are connected by the overflowing glue, a solid propagation path of noise will be formed after the two adhesive layers 400 are connected, and the noise will propagate outward through the path, and the noise reduction effect will be reduced. Accordingly, by providing the first extension part 312, the adhesive layer 400 can be prevented from overflowing, and the solid propagation path of noise can be avoided from being formed after the two adhesive layers 400 are connected, thereby ensuring that the sound-absorbing pad 300 effectively plays the role of buffering, sound insulation and noise reduction.

[0106] In addition, when the distance between the first extension portion 312 and the static contact 212 is larger, after filling with glue, the creepage gap between the main contacts can also be increased to achieve insulation withstand voltage.

[0107] In one embodiment, the muffler pad 300 forms a first glue storage space on a side facing the insulating cover 211 , together with the side wall of the static contact 212 and the insulating cover 211 , and the first glue storage space is used to fill the glue layer 400 .

[0108] It should be noted that in this embodiment, the insulating cover 211 and the muffler pad 300 are designed with a "glue storage" structure. The first glue storage space is conducive to the filling of glue, which can ensure that the muffler pad 300 and the insulating cover 211 are connected to form an insulating wall, thereby ensuring the creepage distance here. Specifically, when glue is applied to the surface of the insulating cover 211 and the muffler pad 300 is assembled with the insulating cover 211, the glue can be "squeezed" into the first glue storage space (such as Fig.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.

[0109] At the same time, the first glue storage space can also improve the firmness of the bonding between the noise-absorbing pad 300 and the insulating cover 211, so as to improve the stability of related structural parts in the relay.

[0110] In a specific embodiment, Fig.10 As shown, the muffler pad 300 is provided with a guide slope 313 around the stationary contact 212. It is understandable that the guide slope 313 can be formed by the body portion 311 alone, or the guide slope 313 can be formed by the body portion 311 and the first extension portion 312.

[0111] 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 above-mentioned first glue storage space. Along the direction of the static contact 212 close to the exposure hole 111, the distance between the guide slope 313 and the static contact 212 gradually decreases, so that the first glue storage space is larger on the side close to the insulating cover 211 and smaller on the side away from the insulating cover 211, so as to reserve a larger glue storage space, which is convenient for the glue layer 400 to fill into the first glue storage space.

[0112] In addition, the guide slope 313 can also play a guiding role during assembly to facilitate the assembly of the silencer pad 300 and the static contact 212.

[0113] Of course, the inner surface of the sound-absorbing pad 300 is not limited to being set Fig.10 The guide slope 313 shown can also be set to other configurations as required, and the details will not be repeated here.

[0114] In one embodiment, Figures 7 to 10 As shown, the muffler pad 300 further includes a second extension portion 314, which is located on the same side of the main body portion 311 as the first extension portion 312, and is located on a side of the first extension portion 312 that faces away from the stationary contact 212, and is spaced apart from the first extension portion 312, and a second glue 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 glue storage space P is shown in the form of a glue storage ring.

[0115] like Figure 7 and Fig.10 As shown, the second glue storage space P is conducive to the filling of glue, which can ensure that the sound-absorbing pad 310 and the first housing 110 are connected to form an insulating wall, thereby ensuring the creepage distance here. In addition, after the sound-absorbing pad 300 is assembled with the first housing 110 and the glue is cured, the first housing 110 and the sound-absorbing pad 300 are fixedly connected through the glue layer 400, which can improve the stability of related structural parts in the relay, ensure that the insulating cover 211 does not shake in the first housing 110, and reduce noise.

[0116] Or, if Fig.21 and Fig. 22 As shown, the second glue storage space P is used to fill the plastic of the first shell 110 that is integrally injection molded with the sound-absorbing pad 300. The second glue storage space P is conducive to the plastic filling of the first shell 110, which can ensure that the sound-absorbing pad 300 and the first shell 110 are connected to form an insulating wall, thereby ensuring the creepage distance here.

[0117] In a specific embodiment, Fig.11In the structure shown, 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 ensure that the glue does not overflow from the second glue storage space P.

[0118] In one embodiment, Figures 7 to 10 As shown, the sound-absorbing pad 300 further includes a third extension portion 315, which is located on the side of the main body 311 facing away from the first shell 110 where the exposure hole 111 is set, and the third extension portion 315 abuts against the outer wall of the insulating cover 211. The third extension portion 315 locates and blocks part of the glue from flowing down. In addition, if the glue flows to the surface of the insulating cover 211 and solidifies, it does not affect the performance, so the third extension portion 315 can be set according to needs.

[0119] Understandably, Fig.10 The main body 311 , the first extension portion 312 , the second extension portion 314 , and the third extension portion 315 of the noise-absorbing pad 300 are schematically separated by dashed lines, but the present invention is not limited thereto.

[0120] like Fig.12 When other structures protrude from the top of the insulating cover 211, a relief portion ( Figures 7 to 10 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, such as an exhaust pipe, a welding terminal.

[0121] As an example, when two static contacts 212 are provided in the relay, the avoidance portion is provided in the body portion 311 and is located between the two openings 3111, so as to Fig.12 The auxiliary contacts 218 and other structures shown are made to give way.

[0122] When the avoidance portion is specifically provided, the avoidance portion has various structural forms. For example, the avoidance portion can be a avoidance through hole or a Figure 8 The avoidance groove 316 shown. 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 protruding 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, and the surface of the protruding structure 317 can be as shown in FIG. Figure 7 and Fig. 9 As shown, a rib 3171 is provided, and it can also be Figures 13 to 16There is no rib 3171 shown. The structure of the rib 3171 can be set according to the needs, and can be, for example, as follows Figure 7 or Fig. 9 The wavy shape shown can of course also be a scattered dot shape, etc.

[0123] 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 glue is applied, the bonding force can be increased and the creepage insulation capability can be enhanced. When glue is not applied, the raised structure 317 can be partially interference fit with the first housing 110 and the relay. The 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 easier to deform at the corrugation to absorb the interference, which is more conducive to assembly.

[0124] When the housing 100 and the sound-absorbing pad 300 are an integrally formed structure, the rib 3171 has the effect of increasing the injection molding contact area and improving the bonding strength between the integrally formed sound-absorbing pad 300 and the housing 100 .

[0125] It is worth noting that a convex 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 be provided with an interference convex rib 3171 on the side facing the insulating cover 211 and between the two stationary contacts 212 to cooperate with the top surface of the insulating cover 211 and enhance the creepage insulation capability between the stationary contacts 212.

[0126] In addition, when the avoidance portion is the avoidance groove 316, as shown in FIG. Figures 17 to 20 As shown, 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 with or without glue to play the corresponding role.

[0128] It is worth noting that the muffler pad 300 in the above figures is shown in a single piece. Of course, the muffler pad 300 can also be configured to include multiple sub-gaskets 301, and the multiple sub-gaskets 301 are arranged at intervals to reduce the difficulty of assembly and reasonably utilize the space inside the relay. For example, Fig.23 and Fig.24 As shown, when the number of the static contacts 212 in the relay is two, the muffler pad 300 may include two sub-gaskets 301 , each of which is provided with an opening 3111 so that the sub-gasket 301 and the static contact 212 can be assembled.

[0129] When the sub-gasket 301 is specifically arranged, the first extension portion 312 , the guide slope 313 , the second extension portion 314 and the third extension portion 315 may be arranged on the sub-gasket 301 as required, and the details are not repeated here.

[0130] In addition, when setting the relay provided in the embodiment of the present application, the relay is not limited to including only two static contacts 212. The number of static contacts 212 in the relay can be set according to requirements. For example, Fig.25 As shown, the number of static contacts 212 in the relay is four. Fig.26 As shown, the relay inner noise-absorbing pad 300 may be provided with four openings 3111 to correspond to the corresponding stationary contacts 212 .

[0131] Understandably, Fig.26 The middle sound-absorbing pad 300 is an integrated structure. Of course, the sound-absorbing pad 300 can also be configured to include two sub-gaskets 301, three sub-gaskets 301 and four sub-gaskets 301. The specific structures of the sub-gaskets 301 can be the same or different.

[0132] In addition, the above-mentioned sound-absorbing pad 300 can be a multi-layer structure or a single-layer structure. For example, the sound-absorbing pad 300 includes multiple layers of stacked sound-absorbing layers. Specifically, adjacent sound-absorbing layers can be fixed (such as bonded), the sound-absorbing layer located at the top of the multi-layer sound-absorbing layer is bonded to the first shell 110, and the sound-absorbing layer located at the bottom of the multi-layer sound-absorbing layer is bonded to the insulating cover 211.

[0133] 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.

[0134] Please continue to refer to Figure 1 and Figure 3 In the relay provided in the embodiment of the present application, the second housing 120 is fixed relative to the first housing 110. When the internal structure of the relay is specifically set, the second housing 120 can also be set to have a fixed relationship with other structural parts in the relay. If the fixed area S of the first housing 110 and the insulating cover 211 is defined to be located at the top of the relay, the fixed position of the second housing 120 and other structural parts in the relay can be located at the bottom or side of the relay.

[0135] Now, several specific application examples are provided in combination with the first shell 110 and the second shell 120 .

[0136] Example 1: Provide an independent sound-absorbing pad 300, fix the sound-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.

[0137] In a specific embodiment, the relay provided in the embodiment of the present application is provided with a muffler pad 300. The muffler pad 300 is placed on the top of the insulating cover 211, and the muffler 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.

[0138] It should be noted that this example has the following advantages: 1. The upper and lower sides are convenient for assembly operation; 2. Both the upper and lower sides can be fixed, and the first shell 110 and the insulating cover 211 are structurally stable, and the left and right sides do not need to be fixed by glue. At this time, a gap is set between the shell 100 and the insulating cover 211, and the noise propagation on both sides needs to pass through the air medium, and the air propagation is slower than the solid propagation and has less propagation energy. Therefore, this layout can also reduce the propagation of internal noise to the outside.

[0139] Example 2: 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 and other structural parts in the relay (for example, the U-shaped yoke 226) are fixed at the bottom by glue.

[0140] Example 3: Set up an independent muffler pad 300, fix the muffler pad 300 to the first housing 110 and the insulating cover 211 respectively (for example, by gluing), and fix the second housing 120 to other structural parts in the relay (for example, the U-shaped yoke 226) by glue on the side. It is understandable that the glue spot position on the side needs to be combined with the structure of the U-shaped yoke 226, and glue can be applied in a whole circle or only on two opposite sides, which will not be described in detail.

[0141] 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 glue at the side.

[0142] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided by the present utility model can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0143] In the embodiments of the utility model, 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 otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0144] In the description of the utility model embodiments, it needs to be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the utility model embodiments.

[0145] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0146] The above are only preferred embodiments of the utility model embodiments, and are not intended to limit the utility model embodiments. For those skilled in the art, the utility model embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model embodiments shall be included in the protection scope of the utility model 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, characterized in that: A glue layer is arranged 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 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 by the adhesive layer, and the first shell and the sound-absorbing pad are bonded 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, the static contact is placed in the opening corresponding to it, and penetrates into the exposure hole through the opening.

7. The relay according to claim 6, characterized in that: The noise-absorbing pad also 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 with the side wall of the static contact and the static contact on a side facing the insulating cover, 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 stationary contact; along the direction in which the stationary contact approaches the exposure hole, the distance between the guide slope and the stationary contact gradually decreases.

10. The relay according to claim 7, characterized in that: 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, and 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 extending portion abuts against an inner wall of the first shell on one side facing the insulating 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 revealing hole is arranged, 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 escape portion.

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

15. The relay according to claim 13, characterized in that: The avoidance portion is an avoidance groove, and the avoidance groove is recessed from the main body toward a 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, the main body forms a protruding structure at a position corresponding to the avoidance groove, and a convex rib is arranged 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 also 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 from the static contact; the static contact cooperates with the moving contact piece to form 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.

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

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