Contactor

Abstract

The embodiment of the utility model provides a contactor which comprises a shell assembly which comprises a first shell and a second shell which are installed together, a containing cavity is formed in the first shell, a fixed core is installed in the containing cavity, a first limiting face is formed on the fixed core, and a second limiting face is formed on the second shell. The second shell is provided with a static contact and is provided with a second limiting surface opposite to the first limiting surface, and the second limiting surface is provided with a groove; and the buffer piece is arranged in the groove and abuts against the first limiting surface. According to the contactor provided by the embodiment of the invention, the vibration rebound of the fixed core is transmitted to the second shell through the buffer piece, and under the buffer action of the buffer piece, the impact on the second shell is reduced, so that the obvious jumping of the second shell and the static contact is avoided, and the static contact and the moving contact can be kept in good contact.

Description

Technical Field

[0001] The embodiments of this disclosure generally relate to the field of electrical equipment, and more specifically to a contactor. Background Technology

[0002] A contactor mainly consists of an electromagnetic system, a contact system, and an arc-extinguishing system. The electromagnetic system includes a coil, a fixed core, and a movable core. The contact system includes a stationary contact and a moving contact. The coil, fixed core, and stationary contact are fixed to the contactor housing. The movable core and moving contact are mounted on a moving contact support, which slides within the contactor housing. The moving contact support can move between an initial position and an operating position to allow the moving and stationary contacts to engage or disengage. A return spring is installed within the contactor housing; this spring applies force to the movable core, holding the moving contact support in its initial position. When the coil is energized, the electromagnetic attraction generated by the fixed core draws the movable core to move, switching the moving contact support from the initial position to the operating position. The arc-extinguishing system extinguishes the arc generated when the moving and stationary contacts separate. Utility Model Content

[0003] This disclosure provides a contactor, comprising: a housing assembly including a first housing and a second housing mounted together, wherein the first housing forms a receiving cavity, a fixing core is mounted in the receiving cavity, a first limiting surface is formed on the fixing core, a stationary contact is mounted on the second housing and the second housing has a second limiting surface opposite to the first limiting surface, and a groove is provided on the second limiting surface; and a buffer member is disposed in the groove and abuts against the first limiting surface.

[0004] In some embodiments, the groove includes a straight groove portion and a flared portion that are in contact, and the buffer member engages with the straight groove portion through the flared portion.

[0005] In some embodiments, at least a portion of the sidewall of the flared portion is inclined relative to the corresponding sidewall of the straight groove portion, and / or, at least a portion of the sidewall of the flared portion is arc-shaped, and the intersection of at least a portion of the sidewall of the flared portion and the corresponding sidewall of the straight groove portion is smoothly transitioned.

[0006] In some embodiments, the cross-section of both the flared portion and the straight groove portion is rectangular or circular.

[0007] In some embodiments, the buffer includes a base and at least one extension extending from the top surface of the base, the cross-section of the at least one extension decreasing in a direction away from the base, and the top surface of the extension abutting against the bottom wall of the groove, and the bottom surface of the base abutting against the first limiting surface.

[0008] In some embodiments, a portion of the base abuts against the sidewall of the straight groove; and / or at least one extension has a positioning protrusion on its side, and at least one extension abuts against the sidewall of the straight groove via the positioning protrusion.

[0009] In some embodiments, the buffer includes at least two extensions, with each pair of adjacent extensions spaced apart.

[0010] In some embodiments, the buffer includes a base and at least one extension extending from the top surface of the base, the cross-section of the at least one extension decreasing in a direction away from the base, and the bottom surface of the base abutting against the bottom wall of the groove, and the top surface of the extension abutting against a first limiting surface.

[0011] In some embodiments, the height of the base is less than the depth of the groove.

[0012] In some embodiments, the bottom surface of the base is provided with at least one positioning hole, the at least one positioning hole extending into at least one extension; and the bottom wall of the groove is provided with at least one positioning post, the at least one positioning post cooperating with at least one positioning hole, and the height of the positioning post being less than the depth of the corresponding positioning hole.

[0013] According to an embodiment of this disclosure, a groove is provided on the second limiting surface of the second housing, and a buffer member is disposed in the groove, abutting against the first limiting surface of the fixed core. Thus, when the movable core and the fixed core collide, the vibration rebound of the fixed core is transmitted to the second housing via the buffer member. Under the buffering effect of the buffer member, the impact on the second housing is reduced, thereby preventing significant jumping between the second housing and the stationary contact, ensuring good contact between the stationary and movable contacts. Furthermore, under the buffering effect of the buffer member, the duration of the vibration rebound of the fixed core caused by the collision of the movable and fixed cores is also significantly reduced. This is beneficial for improving the electrical life of the contactor.

[0014] It should be understood that the content described in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0015] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0016] Figure 1 A cross-sectional schematic diagram of a contactor according to an embodiment of the present disclosure is shown;

[0017] Figure 2 It shows Figure 1 The diagram shows a cross-sectional view of the contactor's groove and buffer element taken along one direction;

[0018] Figure 3It shows Figure 1 The contactor shown is a cross-sectional view taken along another direction, showing the groove, buffer, and retaining core of the contactor, with the buffer pre-compressed.

[0019] Figure 4 It shows Figure 1 A partially enlarged schematic diagram of the second housing of the contactor shown;

[0020] Figure 5 and Figure 6 It shows Figure 1 The diagram shows the structure of the contactor's buffer component when viewed from different angles.

[0021] Figure 7 A cross-sectional schematic diagram of a contactor according to another embodiment of the present disclosure is shown;

[0022] Figure 8 It shows Figure 7 Enlarged diagram of point A in the diagram;

[0023] Figure 9 It shows Figure 7 A partially enlarged schematic diagram of the second housing of the contactor shown; and

[0024] Figure 10 It shows Figure 7 The diagram shows the structure of the contactor's buffer component. Detailed Implementation

[0025] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0026] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0027] Figure 1 A cross-sectional view of a contactor 100 provided according to an embodiment of the present disclosure is shown as an example. The contactor 100 may also be referred to as an electromagnetic contactor. Figure 2 An example is shown Figure 1 The groove 1210 and buffer 50 shown are cut in one direction.

[0028] Figure 3 An example is shown Figure 1 The groove 1210, buffer 50 and fixing core 22 shown are cut in another direction, with the buffer 50 pre-compressed. Figure 3 The direction of interception and Figure 2 The interception direction is perpendicular to the interception direction. Figure 4 It shows Figure 1 A partially enlarged schematic diagram of the second housing 12 shown. Figure 5 and Figure 6 It shows Figure 1 The diagram below shows the structure of the buffer 50 as viewed from different angles. Figures 1 to 6 The contactor 100 is described below.

[0029] See Figure 1 The contactor 100 may include a housing assembly 10, an electromagnetic system 20, a contact system 30, and an arc extinguishing system 40.

[0030] The housing assembly 10 is a modular structure and can be assembled from multiple housing parts. In some embodiments, the housing assembly 10 includes a first housing 11 and a second housing 12 mounted together. The coil (also referred to as an electromagnetic coil) 21 and the fixed core (also referred to as a stationary iron core) 22 of the electromagnetic system 20 can be mounted on the first housing 11. The movable core (also referred to as a moving iron core) 23, the contact system 30, and the arc-extinguishing system 40 of the electromagnetic system 20 can be mounted on the second housing 12.

[0031] In some alternative embodiments, the first housing 11 and / or the second housing 12 may also be separate structures. For example, the first housing 11 may include a first frame body and a first cover mounted on the first frame body, the first cover being attached to the side of the first frame body opposite to the second housing 12. The second housing 12 may include a second frame body (also referred to as a middle frame) and a second cover mounted on the second frame body, the second cover being attached to the side of the second frame body opposite to the first housing 11. Of course, the structures of the first housing 11 and the second housing 12 can be designed according to actual needs and are not limited to the examples described above.

[0032] See also Figure 1 The first housing 11 has a receiving cavity 110, which has an opening 1101 opposite to the second housing 12. The coil 21 and the fixing core 22 can be fixed to the receiving cavity 110, for example, through the opening 1101.

[0033] The second housing 12 has a receiving cavity 120 opposite to the receiving cavity 110. The receiving cavity 120 is used for at least a portion of the movable core 23 of the electromagnetic system 20 to slide therein. The second housing 12 also has a second limiting surface 121 opposite to the opening 1101. In some embodiments, the second limiting surface 121 can cooperate with the bottom wall 1102 of the receiving cavity 110 to define the position of the fixed core 22 in the sliding direction of the movable core 23.

[0034] As previously described, the electromagnetic system 20 includes a coil 21, a fixed core 22, and a movable core 23. The coil 21 may include a coil support 211 and a winding 212 wound on the coil support 211. The fixed core 22 is disposed adjacent to the coil 21. The movable core 23 is connected to the moving contact support 33 of the contact system 30, and the moving contact support 33 is slidably engaged with the second housing 12. When the coil 21 is energized, the fixed core 22 generates an electromagnetic attraction, causing the movable core 23 to be attracted to the fixed core 22 and move towards it to engage with it. When the coil 21 is de-energized, the electromagnetic attraction of the fixed core 22 disappears, and the movable core 23 can move away from the fixed core 22 under the action of a return spring (not shown).

[0035] See Figure 1 In some embodiments, the fixing core 22 may be formed by stacking silicon steel sheets. The fixing core 22 may include a bottom 2201, two extensions 2202, and two support portions 2203. The bottom 2201 is supported, for example, by the bottom wall 1102 of the receiving cavity 110. The two extensions 2202 extend from opposite ends of the bottom 2201 toward the opening 1101. The two support portions 2203 extend toward each other from the ends of the two extensions 2202 away from the bottom 2201. A gap 2204 is formed between the two support portions 2203. A first limiting surface 221 is formed on the surface of the two support portions 2203 facing the second housing 12. The first limiting surface 221 is opposite to and cooperates with the second limiting surface 121 to restrict movement of the fixing core 22 toward the second housing 12.

[0036] The coil 21 is fixed in the space defined by the fixed core 22. The center hole of the coil support 211 of the coil 21 is opposite to the gap 2204.

[0037] The movable core 23 can be formed by stacking silicon steel sheets. The movable core 23 can be T-shaped, including a support portion 2301 and a cylindrical portion 2302 extending from the middle of the support portion 2301. The support portion 2301 slides relative to the second housing 12 in the receiving cavity 120. The cylindrical portion 2302 extends through the spacer 2204 into the central hole of the coil support 211, and the cylindrical portion 2302 is slidably engaged with the central hole of the coil support 211. When the coil 21 is energized, the support portion 2301 of the movable core 23 can be attracted to the support portion 2203 of the fixed core 22, and the cylindrical portion 2302 is attracted to the bottom 2201.

[0038] Of course, in some alternative embodiments, the coil 21, the fixed core 22, and the movable core 23 may also have other implementations, not limited to the examples above.

[0039] The contact system 30 includes a stationary contact 31, a moving contact 32, and the aforementioned moving contact support 33. The stationary contact 31 is fixed to the second housing 12, and the moving contact 32 is mounted on the moving contact support 33. As described above, by controlling the energization and de-energization of the control coil 21, the movable core 23 can drive the moving contact support 33 to slide relative to the second housing 12, thereby achieving the contact and separation of the moving contact of the moving contact 32 and the stationary contact of the stationary contact 31.

[0040] The arc extinguishing system 40 includes, for example, an arc extinguishing chamber disposed on the second housing 12 and an arc extinguishing grid 41 disposed within the arc extinguishing chamber. When the moving contact 32 and the stationary contact 31 separate, a high-temperature arc is generated between the moving contact 32 and the stationary contact 31, which can be quickly extinguished by the arc extinguishing system 40.

[0041] See Figure 1 As described above, when the coil 21 of the electromagnetic system 20 is energized, the movable core 23 and the fixed core 22 are attracted together and collide, causing the fixed core 22 to vibrate and rebound. For the contactor 100 where the second limiting surface 121 and the first limiting surface 221 are in direct contact, the vibration and rebound of the fixed core 22 will directly impact the second housing 12, causing the second housing 12 to drive the stationary contact 31 to jump synchronously. This leads to poor contact between the stationary contact 31 and the moving contact 32, which are already in contact, and may even cause arcing. Arcing will cause wear and melting of the stationary contact of the stationary contact 31 and the moving contact of the moving contact 32, affecting the service life of the contact assembly 30 and thus the electrical life of the contactor 100.

[0042] See also Figure 1To address the issue that the vibration rebound of the fixed core 22 directly impacts the second housing 12 when the movable core 23 and the fixed core 22 are engaged, the contactor 100 provided in this embodiment has a groove 1210 on the second limiting surface 121 of the second housing 12, and a buffer member 50 is provided in the groove 1210. The buffer member 50 protrudes relative to the second limiting surface 121 and abuts against the first limiting surface 221 of the fixed core 22. The number of grooves 1210 and buffer members 50 can be set as needed. Thus, when the coil 21 is energized and the movable core 23 and the fixed core 22 are engaged and impact each other, the vibration rebound of the fixed core 22 is not directly transmitted to the second housing 12, but is transmitted to the second housing 12 through the buffer member 50. Under the buffering effect of the buffer member 50, the impact on the second housing 12 is reduced, thereby preventing significant jumping between the second housing 12 and the stationary contact 31, and ensuring good contact between the stationary contact 31 and the movable contact 32. Furthermore, thanks to the buffering effect of the buffer 50, the duration of vibration rebound of the fixed core 22 caused by the attraction of the movable core 23 and the fixed core 22 can be significantly reduced. This is beneficial to improving the electrical life of the contactor 100.

[0043] Figures 2 to 6 It shows Figure 1 An exemplary embodiment of the buffer 50 and groove 1210 in the contactor 100 shown.

[0044] Specifically, the groove 1210 includes a straight groove portion 1213 and a flared portion 1214 that are adjacent to each other. Both the straight groove portion 1213 and the flared portion 1214 have rectangular cross-sections. The straight groove portion 1213 is adjacent to the bottom wall 1211 of the groove 1210, and the flared portion 1214 is adjacent to the opening of the groove 1210. The cross-sectional size of the straight groove portion 1213 is substantially uniform. The cross-sectional area of ​​the flared portion 1214 gradually increases in size along the direction away from the straight groove portion 1213.

[0045] The buffer member 50 engages with the straight groove 1213 via the flared portion 1214. It can be understood that the buffer member 50 protrudes from the flared portion 1214 to abut against the first limiting surface 221, thus pre-compressing the buffer member 50. When the movable core 23 and the fixed core 22 are attracted together, and the buffer member 50 is further compressed by the impact from the fixed core 22, the flared portion 1214 provides sufficient deformation space for further compression deformation of the buffer member 50, thereby improving the stress state of the buffer member 50 during compression and increasing its service life.

[0046] See Figure 2 and Figure 3The two opposing sidewalls 1216 of the flared portion 1214 are arc-shaped, and the other two sidewalls 1216 of the flared portion 1214 are inclined relative to the corresponding sidewalls 1215 of the straight groove portion 1213. The flared portion 1214 is generally trumpet-shaped. This allows sufficient deformation space for the compression deformation of the buffer member 50, thereby further improving the stress state of the buffer member 50 when it is compressed.

[0047] Of course, there are many other implementations of the flared portion 1214, not limited to the examples above. The flared portion 1214 only needs to provide deformation space for further compression deformation of the buffer member 50. For example, in some alternative embodiments, a portion of the sidewall 1216 of the flared portion 1214 may be inclined relative to the corresponding sidewall 1215 of the straight groove portion 1213 (e.g., two opposing sidewalls 1216 of the flared portion 1214 are inclined relative to their corresponding sidewalls 1215), while other sidewalls 1216 may be in the same plane as the corresponding sidewalls 1215 of the straight groove portion 1213. Alternatively, in some alternative embodiments, each sidewall 1216 of the flared portion 1214 is inclined relative to the corresponding sidewall 1215 of the straight groove portion 1213. Alternatively, in some alternative embodiments, a portion of the sidewalls 1216 of the flared portion 1214 are arc-shaped (e.g., two opposing sidewalls 1216 of the flared portion 1214 are arc-shaped), and the other sidewalls 1216 may be in the same plane as the corresponding sidewalls 1215 of the straight groove portion 1213. Alternatively, in some alternative embodiments, all sidewalls 1216 of the flared portion 1214 are arc-shaped.

[0048] In some embodiments, the intersections of the inclined or arc-shaped sidewalls 1216 of the flared portion 1214 with the corresponding sidewalls 1215 of the straight groove portion 1213 are smoothly transitioned. In some embodiments, the intersections of the flared portion 1214 with the second limiting surface 121 are smoothly transitioned. That is, protruding edges are avoided as much as possible in the areas where the sidewalls of the groove 1210 may contact the buffer member 50, thereby preventing the buffer member 50 from being scratched by protruding edges during compression deformation.

[0049] See Figure 5 and Figure 6 The buffer 50 includes a base 51 and two extensions 52 extending from the top surface 512 of the base 51. The base 51 and each extension 52 have, for example, rectangular cross-sections. The cross-sections of each extension 52 decrease in size along the direction away from the base 51. Adjacent extensions 52 are spaced apart by a predetermined distance. The top surface 521 of the extension 52 away from the base 51 abuts against the bottom wall 1211 of the groove 1210, and the bottom surface 511 of the base 51 protrudes relative to the groove 1210 and abuts against the first limiting surface 221 of the fixing core 22. In some embodiments, the area of ​​the bottom surface 511 of the base 51 is smaller than the area of ​​the top surface 512 of the base 51.

[0050] See back Figure 2 and Figure 3 When the buffer 50 is compressed by the impact from the fixed core 22, the gap between the side wall 1216 of the flared portion 1214 and the side of the base 51, the gap between the side wall 1215 of the straight groove portion 1213 and the side of the extension portion 52, and the gap between adjacent extension portions 52 provide deformation space for the compression deformation of the buffer 50. This further helps to improve the stress condition of the buffer 50 and to increase the service life of the buffer 50.

[0051] In addition, by abutting the bottom surface 511 of the base 51 with the first limiting surface 221, compared with abutting the top surface 521 of each extension 52 with the first limiting surface 221, it is more beneficial to improve the wear resistance and service life of the buffer member 50, so that the buffer member 50 can reliably play a buffering role for a long time.

[0052] In some embodiments, a portion of the base 51 extends into the straight groove 1213, and the side of the portion of the base 51 abuts against the side wall of the straight groove 1213 to fix the position of the buffer 50 in the groove 1210 and prevent the buffer 50 from shaking relative to the groove 1210.

[0053] See Figure 2 , Figure 5 and Figure 6 In some embodiments, a positioning protrusion 53 is provided on the side of the extension 52. The positioning protrusion 53 can, for example, abut against the side wall 1215 of the straight groove 1213 to fix the position of the buffer 50 in the groove 1210, and at the same time improve the mechanical properties of the buffer 50.

[0054] It should be noted that, although in Figures 1 to 6 In the illustrated embodiment, the base 51 is provided with two extensions 52, and the cross-sections of the groove 1210, the base 51, and each extension 52 are rectangular. However, in some alternative embodiments, the cross-sectional shapes of the groove 1210, the base 51, and each extension 52, the number of extensions 52, etc., may be implemented in other ways. For example, in some embodiments, the number of extensions 52 may be one or more than two. In some embodiments, the cross-sectional shapes of the groove 1210, the base 51, and the extensions 52 may be circular or other suitable shapes. In some embodiments, when the number of extensions 52 is more than two, the multiple extensions 52 may be arranged in a straight line, a ring, or an array.

[0055] Additionally, it should be noted that although the above embodiment is described with the bottom surface 511 of the base 51 abutting against the first limiting surface 221 and the top surface 521 of each extension 52 abutting against the bottom wall 1211 of the groove 1210 as an example, in actual applications, the bottom surface 511 of the base 51 abutting against the bottom wall 1211 of the groove 1210 and the top surface 521 of the extension 52 abutting against the first limiting surface 221 can also be abutted against, which is also within the protection scope of this disclosure.

[0056] Figure 7 A cross-sectional schematic diagram of a contactor 100 provided according to another embodiment of the present disclosure is shown as an example. Figure 8 It shows Figure 7 Enlarged view of point A in the image. Figure 9 An example is shown Figure 7 A partially enlarged schematic diagram of the second shell 12. Figure 10 An example is shown Figure 7 A schematic diagram of the buffer element 50 is shown. The contactor 100 includes a housing assembly 10, an electromagnetic system 20, a contact system 30, an arc-extinguishing system 40, and a buffer element 50. Without conflict, Figure 7 The structure of the contactor 100 shown can be referred to the above text. Figure 1 The description of the structure of the contactor 100 shown will not be repeated here.

[0057] Figure 9 and Figure 10 It shows Figure 7 An exemplary structure of the buffer 50 and the groove 1210 in the contactor 100 shown.

[0058] Specifically, the buffer 50 includes a base 51 and an extension 52 extending from the top surface 512 of the base 51. The base 51 mates with the groove 1210, with the bottom surface 511 of the base 51 abutting against the bottom wall 1211 of the groove 1210. The extension 52 protrudes relative to the groove 1210, with its top surface 521, away from the base 51, abutting against the first limiting surface 221 of the fixing core 22. The cross-sections of the base 51, the extension 52, and the groove 1210 are, for example, circular. The cross-section of the extension 52 decreases in the direction away from the base 51.

[0059] In some embodiments, the cross-sectional size of the groove 1210 is substantially uniform, and the height of the base 51 may be less than the depth of the groove 1210. When the buffer 50 is further compressed by the impact from the fixing core 22, the gap between the side of the extension 52 and the sidewall of the groove 1210 provides deformation space for the further compression deformation of the buffer 50. This helps to improve the stress state of the buffer 50 when it is compressed, thereby extending the service life of the buffer 50.

[0060] In some alternative embodiments, the groove 120 may include the straight groove 1213 and the flared portion 1214 described above. In this case, the height of the base 51 may be less than the height of the straight groove 1213, that is, the extension 52 has a portion extending into the straight groove 1213. In this way, the gaps between the side of the extension 52 and the sidewalls of the straight groove 1213 and the flared portion 1214 provide a larger deformation space for the compression deformation of the buffer 50, thereby further improving the stress state of the buffer 50 when it is compressed.

[0061] Reference Figure 8 and Figure 9 In some embodiments, the bottom surface 511 of the base 51 may be provided with a positioning hole 510, which extends into the extension 52. The positioning hole 510 may have a portion located within the extension 52. The bottom wall 1211 of the groove 1210 is provided with a positioning post 1217. The positioning post 1217 cooperates with the positioning hole 510 to fix the position of the buffer member 50 in the groove 1210. In this case, a deformation space may be reserved between the side surface of the base 51 and the side wall of the groove 1210 to facilitate the improvement of the stress state of the buffer member 50 when it is compressed.

[0062] In some embodiments, the height of the positioning post 1217 may be less than the depth of the corresponding positioning hole 510. The portion of the positioning hole 510 that does not engage with the positioning post 1217 also provides deformation space for the compression deformation of the buffer 50, which also helps to improve the stress state of the buffer 50 when it is compressed.

[0063] It should be noted that, although in Figures 7 to 10 In the illustrated embodiment, the cross-sections of the groove 1210, base 51, and extension 52 are all circular. However, in some alternative embodiments, the groove 1210 and buffer 50 may have other implementations. For example, in some alternative embodiments, the cross-sections of the groove 1210, base 51, and extension 52 may be rectangular or other suitable shapes. In some alternative embodiments, the base 51 may have two or more extensions 52. In some embodiments, when the number of extensions 52 is more than two, the multiple extensions 52 may be arranged in a straight line, a ring, or an array. In some alternative embodiments, when the number of extensions 52 is two or more, the bottom surface of the base 51 may have two or more positioning holes 510, each positioning hole 510 extending into the corresponding extension 52. Correspondingly, the bottom wall 1211 of the groove 1210 may be provided with positioning posts 1217 corresponding to each positioning hole 510.

[0064] According to the contactor 100 provided in the embodiments of this disclosure, the second housing 12 abuts against the fixed core 22 via a buffer member 50. The vibration rebound generated when the fixed core 22 engages with the movable core 23 is transmitted to the second housing 12 through the buffer member 50. Under the buffering effect of the buffer member 50, the impact on the second housing 12 is reduced, thereby preventing significant jumping between the second housing 12 and the stationary contact 31, ensuring good contact between the stationary contact 31 and the moving contact 32. Furthermore, under the buffering effect of the buffer member 50, the duration of the vibration rebound of the fixed core 22 caused by the engagement of the movable core 23 and the fixed core 22 is also significantly reduced. This is beneficial for improving the electrical life of the contactor 100. In addition, the buffer member 50 can be easily installed into the second housing 12 with minimal impact on the assembly efficiency of the contactor 100. The buffer member 50 has low cost and minimal impact on the manufacturing cost of the contactor 100.

[0065] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A contactor characterized by, Comprising: a housing assembly (10) comprising a first housing (11) and a second housing (12) mounted together, and wherein the first housing (11) is formed with a receiving cavity (110) in which a fixed core (22) is mounted, the fixed core (22) being formed with a first limiting surface (221), the second housing (12) being mounted with a stationary contact (31) and having a second limiting surface (121) opposite to the first limiting surface (221), the second limiting surface (121) being provided with a groove (1210); and a buffer piece (50) arranged in the groove (1210) and abutting against the first limiting surface (221).

2. The contactor of claim 1, wherein The groove (1210) comprises a straight slot portion (1213) and a flared portion (1214) connected to each other, and the buffer piece (50) cooperates with the straight slot portion (1213) through the flared portion (1214).

3. The contactor according to claim 2, wherein at least part of the side wall (1216) of the flared portion (1214) is inclined relative to the corresponding side wall (1215) of the straight slot portion (1213), and / or at least part of the side wall (1216) of the flared portion (1214) is arc-shaped, and the intersection of the at least part of the side wall (1216) of the flared portion (1214) and the corresponding side wall (1215) of the straight slot portion (1213) is smoothly transitioned.

4. The contactor of claim 3, wherein The cross section of the flared portion (1214) and the cross section of the straight slot portion (1213) are both rectangular or circular.

5. The contactor according to any one of claims 2 to 4, wherein the buffer piece (50) comprises a base (51) and at least one extension (52) extending from the top surface (512) of the base (51), the cross section of the at least one extension (52) decreases along the direction away from the base (51), and the top surface (521) of the extension (52) abuts against the bottom wall (1211) of the groove (1210), and the bottom surface (511) of the base (51) abuts against the first limiting surface (221).

6. The contactor according to claim 5, wherein the side surface of a part of the base (51) abuts against the side wall of the straight slot portion (1213); and / or the side surface of the at least one extension (52) is provided with a positioning protrusion (53), and the at least one extension (52) abuts against the side wall of the straight slot portion (1213) through the positioning protrusion (53).

7. The contactor of claim 5, wherein, The buffer piece (50) comprises at least two extensions (52), and each adjacent two of the extensions (52) are arranged in a spaced manner.

8. The contactor according to any one of claims 1 to 4, wherein the buffer piece (50) comprises a base (51) and at least one extension (52) extending from the top surface (512) of the base (51), the cross section of the at least one extension (52) decreases along the direction away from the base (51), and A bottom surface (511) of the base (51) is in abutment with a bottom wall (1211) of the recess (1210), and a top surface (521) of the extension (52) is in abutment with the first limiting surface (221).

9. The contactor of claim 8, wherein, The height of the base (51) is less than the depth of the recess (1210).

10. The contactor of claim 8, wherein, A bottom surface (511) of the base (51) is provided with at least one positioning hole (510) extending into the at least one extension (52); and A bottom wall (1211) of the recess (1210) is provided with at least one positioning column (1217) cooperating with the at least one positioning hole (510), and the height of the positioning column (1217) is less than the depth of the corresponding positioning hole (510).

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