Clapper-type relay and moving contact and moving unit thereof

Abstract

The utility model discloses a clapper-type relay and a moving contact and a moving unit thereof, the moving contact is provided with a fixed part fixedly connected with an armature and at least two extension parts arranged at intervals along the Y-axis direction, at least one extension part is a first extension part, one end of the first extension part far away from the fixed part along the X-axis direction is provided with a moving contact, and the moving contact is provided with a second extension part far away from the fixed part along the X-axis direction. A connecting part is arranged between at least one first extension part and at least one adjacent extension part, and at least part of the connecting part is located between the fixed part and the movable contact in the length direction of the extension part. The motion unit comprises the movable contact piece. The contact pressure is large, and the connection between the movable contact and the static contact is reliable and stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a relay field, concretely relates to a snap type relay and its moving contact and movement unit. BACKGROUND

[0002] The snap type relay includes a fixed unit and a movement unit, the fixed unit is provided with a shell, a coil, an iron core, a static contact and a static lead-out end, the movement unit is arranged at the upper end of the fixed unit and includes an armature and a moving contact fixedly connected with the armature, the moving contact is provided with a fixed part connected with the armature and at least two extension parts spaced apart from the fixed part, each extension part is provided with a moving contact, when the coil is not electrified, the movement unit is kept at the position that the moving contact is disconnected with the static contact, after the coil is electrified, the armature is driven by the attraction of the iron core to make the moving contact act so that the moving contact is closed with the static contact. But it is found in practice that when the external current increases, the connection reliability of the moving contact and the static contact is poor. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned defects or problems existing in the background art, providing a snap type relay and its moving contact and movement unit, which have large contact pressure and reliable and stable connection of the moving contact and the static contact.

[0004] To achieve the above-mentioned purpose, the utility model and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] The first technical solution and its related embodiments provide a moving contact of a snap type relay, the moving contact is provided with a fixed part fixedly connected with an armature and at least two extension parts spaced apart along the Y-axis direction, at least one extension part is a first extension part, the first extension part is provided with a moving contact at the end away from the fixed part along the X-axis direction, at least one first extension part is provided with a connecting part between at least one adjacent extension part, and the connecting part is at least partially located between the fixed part and the moving contact along the length direction of the extension part.

[0006] Based on the first technical solution, the second technical solution is also provided, in the second technical solution and its related embodiments, the connecting part is located at the middle part of the length direction of the first extension part.

[0007] Based on the second technical solution, the third technical solution is also provided, in the third technical solution and its related embodiments, the connecting part extends along the Y-axis direction.

[0008] Based on the third technical solution, the fourth technical solution is also provided, in the fourth technical solution and its related embodiments, the connecting part, the fixed part and the corresponding two extension parts form a positioning opening for positioning, and the positioning opening and the armature at least partially overlap in the projection direction perpendicular to the thickness direction of the extension part.

[0009] Based on technical solution four, technical solution five is also provided. In technical solution five and its related embodiments, the extension connected to the first extension through the connecting part is defined as the second extension; the first extension has a first connecting segment and a first deformable segment integrally connected along its length direction, and the second extension has a second connecting segment and a second deformable segment integrally connected along its length direction. Both the first connecting segment and the second connecting segment are integrally connected to the fixing part, and the first deformable segment is provided with the moving contact; the connecting part is integrally connected to the side of the first connecting segment and the second connecting segment at the end away from the fixing part; the sum of the widths of the first connecting segment and the second connecting segment is greater than the sum of the widths of the first deformable segment and the second deformable segment.

[0010] Based on technical solution five, there is also technical solution six. In technical solution six and its related embodiments, when the second extension is not provided with a moving contact, the width of the first deformation segment and the width of the second connecting segment are both greater than the width of the second deformation segment, and the width of the first deformation segment is consistent with the width of the first connecting segment.

[0011] Based on technical solution five or six, there is also technical solution seven. In technical solution seven and its related embodiments, the length of the first deformed segment is at least half of the first extension.

[0012] Based on technical solution one, there is also technical solution eight. In technical solution eight and its related embodiments, the extensions connected to the first extension through the connecting part are not provided with moving contacts.

[0013] Technical solution nine and its related embodiments relate to a moving unit of a snap-action relay, including an armature and a moving contact of the relay as described in any one of technical solutions one to eight.

[0014] Technical solution ten relates to a snap-action relay, including a fixed unit and a moving unit. The fixed unit includes a housing, a coil assembly, and a stationary contact. The axis of the coil of the coil assembly extends along the Z-axis. The moving unit is located at the first end of the coil assembly along the Z-axis and swings relative to the housing, having at least a motion component along the Z-axis, as described in technical solution nine. The stationary contact has a stationary contact corresponding to the moving contact and a stationary lead-out terminal electrically connected to the stationary contact.

[0015] In technical solution eleven and its preferred embodiment, the first extension, the connecting part and the extension that are connected to each other cooperate to form a groove with the opening facing away from the fixing part, and at least one stationary lead-out end is at least partially located in the groove.

[0016] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0017] Through continuous observation, experimentation, and research, the applicant has learned that the reason for the technical problem of "poor reliability of the connection between the moving and stationary contacts when the external current increases" in the existing technical solution is that the contact pressure required for the moving and stationary contacts to close also increases accordingly after the external current increases. The solution to increase the contact pressure in the existing technology is to increase the width or thickness of the extension. Increasing the width of the extension may interfere with other parts inside the relay, thus increasing the space occupied by the relay in the width direction of the extension. Increasing the thickness of the extension will also increase the space occupied by the relay in the thickness direction of the extension. Moreover, since the moving contact is integrally formed, increasing the thickness of the extension will also lead to an increase in the thickness of the fixed part. The fixed part and the armature need to be adjusted accordingly, resulting in high modification costs.

[0018] In the first technical solution and its preferred embodiment, since the connecting portion is located at least partially between the fixed portion and the moving contact along the length direction of the extension portion, when the extension portion connected to the first extension portion via the connecting portion does not have a moving contact, when the moving contact and the stationary contact are attracted, the first extension portion is subjected to the reaction force of the stationary contact. Meanwhile, the extension portion connected to the first extension portion via the connecting portion, due to the absence of a reaction force, forms a height difference with the first extension portion along the Z-axis direction, thereby causing the connecting portion to deform. This deformation of the connecting portion applies force to the first extension portion, increasing the contact pressure and ensuring reliable connection between the moving and stationary contacts. Furthermore, it is stable; when the extension connected to the first extension through the connecting part is also the first extension, after the moving contact and the stationary contact are attracted, the first extension is deformed by the reaction force of the stationary contact, and the stress at the connection position between the first extension and the connecting part is the greatest, resulting in high stress at both ends of the connecting part and low stress in the middle of the connecting part. The connecting part bends and deforms, which in turn exerts force on the first extension, thereby increasing the contact pressure, thus making the connection between the moving contact and the stationary contact reliable and stable; in addition, the increased contact pressure can also reduce the contact resistance, thereby reducing the heat generation of the contact and extending the service life. Therefore, in this technical solution, the contact pressure can be increased by setting the connecting part, without increasing the width of the extension in the Y-axis direction or the thickness in the Z-axis direction. When the moving contact is applied to the snap-action relay, the space occupied by the relay in the Y-axis and Z-axis directions is small, and the modification to the snap-action relay is minimal. Existing production molds for snap-action relays can be used, and there is no need to change the assembly process of existing snap-action relay products. Thus, the contact pressure is increased by making minimal changes to the moving contact, ensuring reliable and stable connection between the moving and stationary contacts. It is not only ingenious in structure but also low in cost.

[0019] In the second technical solution and its preferred embodiment, the connecting part is located in the middle of the length direction of the first extension. On the one hand, it is more conducive to avoiding other components in the relay when the moving contact is applied to the snap-action relay. On the other hand, the connecting part is located between the fixed part and the moving contact along the length direction of the extension, which is more conducive to the deformation of the connecting part exerting force on the first extension, thereby increasing the contact pressure.

[0020] In technical solution three and its preferred embodiments, the connecting part extends along the Y-axis direction, which is more conducive to production and processing and also more conducive to the deformation of the connecting part compared to other shapes.

[0021] In the fourth technical solution and its preferred embodiment, a positioning port for positioning is formed between the connecting part, the fixing part and the corresponding two extensions. The positioning port and the projection of the armature in the direction perpendicular to the thickness of the extension at least partially overlap. This is beneficial for positioning the moving contact during the production and processing process and for measuring mechanical parameters. It is also beneficial for the moving contact to allow the limiting member to pass through the surface of the armature to limit the armature when it is used in a snap-action relay.

[0022] In technical solution five and its preferred embodiments, the connecting part is integrated with the side of the first connecting segment and the second connecting segment at the end away from the fixed part. The sum of the widths of the first connecting segment and the second connecting segment is greater than the sum of the widths of the first deformable segment and the second deformable segment, which increases the overall rigidity of the first connecting segment and the second connecting segment. This makes the overall rigidity formed by the first connecting segment, the second connecting segment and the connecting part greater than that of the first deformable segment and the second deformable segment. Furthermore, the setting of the connecting part is conducive to the smooth transition between the first connecting segment and the first deformable segment, as well as between the second connecting segment and the second deformable segment. This is more conducive to the transmission of the armature's driving force to the moving contact, and also more conducive to the deformation of the first deformable segment and the second deformable segment, thereby further increasing the contact pressure.

[0023] In technical solution six and its preferred embodiments, when the second extension is not provided with a moving contact, the width of both the first deformation segment and the second connecting segment is greater than the width of the second deformation segment. The width of the first deformation segment is consistent with the width of the first connecting segment, which is more conducive to achieving the effect of technical solution five by making the sum of the widths of the first connecting segment and the second connecting segment greater than the sum of the widths of the first deformation segment and the second deformation segment. At the same time, the width of the first deformation segment is increased as much as possible, thereby increasing the contact pressure.

[0024] In technical solution seven and its preferred embodiments, when the length of the first deformation segment is less than half of the first extension, the length of the first deformation segment is relatively short. When the first deformation segment is driven to deform, the stress on the end of the first deformation segment near the connection is relatively large, which easily leads to mechanical fatigue and affects the service life. However, when the length of the first deformation segment is greater than half of the first extension, the length of the first deformation segment is relatively long. When the first deformation segment is driven to deform, the deformation angle of the first deformation segment is small and the contact pressure is small. Therefore, the length of the first deformation segment is at least half of the first extension, which not only ensures that the deformation angle of the first deformation segment is large and the contact pressure is large, but also improves the problems of excessive stress when the length of the first deformation segment is too short or low contact pressure when the length of the first deformation segment is too long.

[0025] Technical solution eight is a preferred embodiment of this application.

[0026] Technical solution nine has the technical advantages of any one of technical solutions one through eight.

[0027] Technical solution ten has the technical advantages of technical solution nine.

[0028] In technical solution eleven and its preferred embodiment, at least one stationary lead-out end is at least partially located in the groove, making full use of the space inside the moving contact. It should be understood that the portion of the stationary lead-out end located in the groove does not interfere with the groove wall and the groove bottom when the moving contact moves. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an exploded perspective view of the relay according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of some of the fixing units and moving units in an embodiment of the present utility model;

[0032] Figure 3 This is a top view of the cover plate of the relay hidden part in an embodiment of this utility model;

[0033] Figure 4 This is a schematic diagram of the moving unit and moving lead of the relay in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram showing the fixed connection between the moving contact and the armature in an embodiment of the present utility model;

[0035] Figure 6 forFigure 5 Top view;

[0036] Figure 7 for Figure 6 Sectional view along the AA direction.

[0037] Explanation of key figure labels:

[0038] 10. Outer shell; 11. Housing; 12. Cover plate; 13. Limiting member; 20. Coil assembly; 21. Coil; 22. Coil terminal; 23. Iron core; 24. Yoke; 25. Second side; 252. Stationary contact; 30. Stationary contact point; 31. Stationary lead-out end; 32. Armature; 40. Through slot; 41. Moving contact; 50. Connecting arm; 51. Bending part; 52. Bending arm; 521. Body; 53. Fixing part; 531. Extension part; 54. Connecting part; 55. First extension part; 56. First connecting section; 561. First deformation section; 562. Second extension part; 57. Second connecting section; 571. Second deformation section; 572. Positioning port; 01. Moving contact point; 02. Through hole; 03. Groove; 04. Moving lead-out end; 70. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0040] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0041] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0042] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0043] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0044] In the claims and the description other than the embodiments, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" only refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they be implemented according to the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to both the Y-axis direction and the Z-axis direction. Exemplarily, the X-axis direction can be divided into front and back, the Y-axis direction can be divided into left and right, and the Z-axis direction can be divided into up and down.

[0045] See Figure 1 , Figure 1 A snap-action relay is shown, comprising a fixed unit and a moving unit.

[0046] The fixing unit is prior art, and it includes a housing 10, a coil assembly 20, a stationary contact 30, and a moving lead-out terminal 60. The housing 10 includes a shell 11 and a cover plate 12. The first end of the shell 11 along the Z-axis direction ( Figure 1 The upper part of the opening is covered by a cover plate 12, which is fixed to the housing 11 and forms a cavity for accommodating the coil assembly 20 and the motion unit. See [reference needed]. Figures 2-3 The cover plate 12 is also fixed with a limiting member 13 for limiting the armature 40 mentioned below, see also Figure 1 The cover plate 12 is also provided with through holes for the coil terminal 23, stationary lead 32 and moving lead 60 (described below) to extend out. See also Figure 1 The coil assembly 20 includes a coil frame 21, a coil 22, a coil terminal 23, an iron core 24, and a yoke 25. The coil 22 is wound around the coil frame 21 and its axis extends along the Z-axis. The coil terminal 23 is electrically connected to the coil 22 and extends out of the upper end of the coil frame 21. The iron core 24 penetrates the coil frame 21 along the Z-axis. The yoke 25 is L-shaped, with its first side ( Figure 1 (Not shown in the image) Extends along the horizontal X-axis and is fixed to the bottom end of the iron core 24, its second side 252 extends vertically and has a notch at the top. Figure 1In this configuration, the second side 252 of the yoke 25 is located at the rear end of the coil assembly 20. The stationary contact 30 is fixed to the upper end of the coil frame 21, specifically to the end (front end) of the coil frame 21 away from the second side 252 of the yoke 25 along the X-axis. The stationary contact 30 has at least one stationary contact 31 and a stationary lead-out end 32 electrically connected to the stationary contact 31. In this embodiment, the stationary contact 30 has one stationary contact 31, and the stationary lead-out end 32 extends along the Z-axis. See also... Figure 2 The movable lead-out end 60 is riveted to the upper end of the second side 252 of the yoke 25, and a through hole 03 is formed between the movable lead-out end 60 and the notch of the second side 252 for the connecting arm 51 of the movable contact 50 and the armature 40 to pass through.

[0047] See Figures 1-2 The motion unit includes an armature 40, a moving contact 50, and an electrical connector 70. The motion unit is located at the first end (upper end) of the coil assembly 20 along the Z-axis and swings relative to the housing 10, having at least a motion component along the Z-axis. The armature 40 has a plate-like structure, and one end of the armature 40 is adapted to be inserted into a notch in the second side 252 of the yoke 25, forming a through slot 41 suitable for the connecting arm 51 described below. Figures 4-5 As shown in the figure, armature 40 is also adapted to fit the upper end of core 24.

[0048] The innovation of this embodiment lies in the moving unit of the snap-action relay, especially the moving contact 50 of the snap-action relay. The structure of the moving contact 50 is described below.

[0049] See Figure 4 The movable contact 50 includes a connecting arm 51, a bent portion 52, and a body 53 integrated together. The connecting arm 51 extends vertically and passes through the through slot 41 of the armature 40, and is fixedly connected to the second side 252 of the yoke 25. In this embodiment, the connecting arm 51 and the second side 252 of the yoke 25 are fixedly connected by riveting. See also Figure 5 The main body 53 is fixed to the armature 40 and at least partially adheres to the upper surface of the armature 40. The bending part 52 connects the upper end of the connecting arm 51 and the rear end of the main body 53 and bends upward. The bending part 52 is provided with two bending arms 521, which are arranged at intervals along the Y-axis.

[0050] The improvement to the moving contact 50 in this embodiment mainly lies in the body 53. Specifically, see [link to documentation]. Figure 5The main body 53 is provided with a fixing part 531 fixed to the armature 40 and at least two extension parts 54 spaced apart along the Y-axis direction. That is, the moving contact 50 is provided with a fixing part 531 fixed to the armature 40 and at least two extension parts 54 spaced apart along the Y-axis direction. The fixing part 531 is integrated with the two bent arms 521 of the bent part 52. The fixing part 531 is riveted to the armature 40. At least one extension part 54 is a first extension part 56. The end of the first extension part 56 away from the fixing part 531 along the X-axis direction is provided with a moving contact 02. At least one first extension part 56 and at least one adjacent extension part 54 are provided with a connecting part 55. The connecting part 55 is located at least partly along the length direction of the extension part 54 between the fixing part 531 and the moving contact 02.

[0051] In this embodiment, the connecting portion 55 is located at the middle of the length direction of the first extension portion 56. That is, the connecting portion 55 is entirely located between the fixed portion 531 and the moving contact 02 along the length direction of the extension portion 54. The connecting portion 55 extends along the Y-axis direction, and a positioning opening 01 for positioning is formed between the connecting portion 55, the fixed portion 531, and the two corresponding extension portions 54. The positioning opening 01 at least partially overlaps with the projection of the armature 40 in the direction perpendicular to the thickness of the extension portion 54. In this embodiment, see... Figures 6-7 The positioning port 01 and the armature 40 are completely overlapped in the projection of the extension 54 in the direction perpendicular to the thickness.

[0052] See Figure 6 The extension 54 connected to the first extension 56 via the connecting part 55 is defined as the second extension 57. The first extension 56 has a first connecting segment 561 and a first deformable segment 562 integrally connected along its length direction. The second extension 57 has a second connecting segment 571 and a second deformable segment 572 integrally connected along its length direction. Both the first connecting segment 561 and the second connecting segment 571 are integrally connected to the fixing part 531. The first deformable segment 562 is provided with a movable contact 02. The connecting part 55 is integrally connected to the side portion of the first connecting segment 561 and the second connecting segment 571 at the end away from the fixing part 531. The sum of the widths of the first connecting segment 561 and the second connecting segment 571 is greater than the sum of the widths of the first deformable segment 562 and the second deformable segment 572. When the second extension 57 is not provided with a movable contact 02, the widths of the first deformable segment 562 and the second connecting segment 571 are both greater than the width of the second deformable segment 572, and the width of the first deformable segment 562 is the same as the width of the first connecting segment 561. In this embodiment, the length of the first deformable segment 562 is at least half that of the first extension 56. The first deformable segment 562, the connecting portion 55, and the second deformable segment 572 cooperate to form a groove 04 with an opening facing away from the fixing portion 531. That is, the first extension 56, the connecting portion 55, and the extension 54 connected to each other cooperate to form a groove 04 with an opening facing away from the fixing portion 531.

[0053] In this embodiment, the second extension 57 does not have a moving contact 02, meaning that none of the extensions 54 connected to the first extension 56 via the connecting portion 55 have a moving contact 02. In this embodiment, the moving contact 50 forms only one first extension 56 and one second extension 57. See [link to documentation]. Figure 2 and Figure 3 The stationary lead-out end 32 is located within the groove 04. In practical applications, the stationary lead-out end 32 is only partially located within the groove 04 along the Z-axis direction, meaning that the stationary lead-out end 32 is at least partially located within the groove 04. The portion of the stationary lead-out end 32 located within the groove 04 does not interfere with the groove wall and bottom of the groove 04 when the moving contact 50 moves. It should be understood that the number of the first extension 56 and the second extension 57 can be increased as needed. Multiple first extensions 56 and second extensions 57 can be alternately arranged along the Y-axis direction. For example, multiple stationary leads 31 can be formed, each stationary lead-out end 31 connected to a stationary contact 31, with each stationary lead-out end 31 distributed within each groove 04; alternatively, multiple stationary contacts 31 can be connected to a stationary lead-out end 32, in which case the stationary lead-out end 32 is located within one of the grooves 04, thereby ensuring that at least one stationary lead-out end 32 is at least partially located within the groove 04. Figure 6 In the middle, the distance between the first extension 56 and the second extension 57 gradually increases in the direction away from the fixed part 531, which is more conducive to avoiding the stationary lead-out end 32, and also conducive to the widening design of the first connecting section 561, the second connecting section 571 and the first deformable section 562.

[0054] See Figure 4 The electrical connector 70 is located above the body 53 and is flexible. In practical applications, the electrical connector 70 corresponds to the position of the first extension 56, or more specifically, extends along the extension direction of the first extension 56, thereby avoiding motion interference between the electrical connector 70 and the limiting member 13.

[0055] It should be understood that in other embodiments, the second extension 57 may be provided with moving contacts 02, so that each extension 54 is a first extension 56. In this case, the stationary contact 30 is provided with stationary contacts 31 that are equal in number and correspond one-to-one with each moving contact 02.

[0056] In this embodiment, when the coil 22 is not energized, the armature 40 moves away from the upper end of the iron core 24 under the action of the reaction force of the moving contact 50, and the moving contact 02 is disconnected from the corresponding stationary contact 31. The limiting member 13 passes through the positioning port 01 to limit the upward movement of the armature 40. After the coil 22 is energized, the armature 40 drives the moving contact 50 to move, so that the moving contact 02 and the stationary contact 31 are closed.

[0057] In this embodiment, since the connecting portion 55 is located at least partially between the fixed portion 531 and the moving contact 02 along the length direction of the extension portion 54, when the extension portion 54 connected to the first extension portion 56 via the connecting portion 55 is not provided with the moving contact 02, when the moving contact 02 engages with the stationary contact 31, the first extension portion 56 is subjected to the reaction force of the stationary contact 31. Meanwhile, the extension portion 54 connected to the first extension portion 56 via the connecting portion 55, having no reaction force, forms a height difference with the first extension portion 56 along the Z-axis direction, thereby causing the connecting portion 55 to deform. The deformation of the connecting portion 55 can exert force on the first extension portion 56, thereby increasing the contact pressure and thus enabling the connection between the moving contact 02 and the stationary contact 31. Reliable and stable; when the extension 54 connected to the first extension 56 via the connecting part 55 is also the first extension 56, after the moving contact 02 and the stationary contact 31 are attracted, the first extension 56 is deformed by the reaction force of the stationary contact 31, and the stress at the connection position between the first extension 56 and the connecting part 55 is the greatest, resulting in high stress at both ends of the connecting part 55 and low stress in the middle of the connecting part 55. The connecting part 55 bends and deforms, thereby exerting force on the first extension 56 in turn, thereby increasing the contact pressure, so that the connection between the moving contact 02 and the stationary contact 31 is reliable and stable; in addition, the increased contact pressure can also reduce the contact resistance, thereby reducing the heat generation of the contact and extending the service life. Therefore, in this embodiment, the contact pressure can be increased by setting the connecting part 55, without increasing the width of the extension part 54 in the Y-axis direction or the thickness in the Z-axis direction. When the moving contact 50 is applied to the snap-action relay, the space occupied by the relay in the Y-axis and Z-axis directions is small, and the modification to the snap-action relay is small. Existing production molds for snap-action relays can be used, and there is no need to change the assembly process of existing snap-action relay products. Thus, the contact pressure is increased by making minimal modifications to the moving contact 50, ensuring that the connection between the moving contact 02 and the stationary contact 31 is reliable and stable. It is not only ingenious in structure, but also low in cost.

[0058] In this embodiment, the connecting portion 55 is located in the middle of the length direction of the first extension portion 56. On the one hand, when the moving contact 50 is applied to the snap-action relay, it is more conducive to avoiding other components inside the relay. On the other hand, the connecting portion 55 is located entirely between the fixed portion 531 and the moving contact 02 along the length direction of the extension portion 54, which is more conducive to the deformation of the connecting portion 55 exerting force on the first extension portion 56, thereby increasing the contact pressure.

[0059] In this embodiment, the connecting part 55 extends along the Y-axis direction, which is more conducive to production and processing and also more conducive to the deformation of the connecting part 55 compared to other shapes.

[0060] In this embodiment, a positioning port 01 for positioning is formed between the connecting part 55, the fixing part 531, and the two corresponding extensions 54. The positioning port 01 and the projection of the armature 40 in the direction perpendicular to the thickness of the extension 54 at least partially overlap. This is beneficial for positioning the moving contact 50 during the production process and for measuring mechanical parameters. It is also beneficial for the moving contact 50 to be used in a snap-action relay so that the limiting member 13 passes through the surface of the armature 40 to limit the armature 40.

[0061] In this embodiment, the connecting portion 55 is integrally connected to the side portion of the first connecting segment 561 and the second connecting segment 571 at the end away from the fixing portion 531. The sum of the widths of the first connecting segment 561 and the second connecting segment 571 is greater than the sum of the widths of the first deformable segment 562 and the second deformable segment 572, which increases the overall rigidity of the first connecting segment 561 and the second connecting segment 571. This makes the overall rigidity of the first connecting segment 561, the second connecting segment 571 and the connecting portion 55 greater than that of the first deformable segment 562 and the second deformable segment 572. Furthermore, the arrangement of the connecting portion 55 facilitates a smooth transition between the first connecting segment 561 and the first deformable segment 562, as well as between the second connecting segment 571 and the second deformable segment 572. This is more conducive to the transmission of the driving force of the armature 40 to the moving contact 02, and also more conducive to the deformation of the first deformable segment 562 and the second deformable segment 572, thereby further increasing the contact pressure.

[0062] In this embodiment, when the second extension 57 is not provided with the movable contact 02, the widths of the first deformation segment 562 and the second connecting segment 571 are both greater than the width of the second deformation segment 572. The width of the first deformation segment 562 is the same as the width of the first connecting segment 561, which is more conducive to achieving the above-mentioned technical effects that the widths of the first connecting segment 561 and the second connecting segment 571 are greater than the widths of the first deformation segment 562 and the second deformation segment 572. At the same time, the width of the first deformation segment 562 is increased as much as possible, thereby increasing the contact pressure.

[0063] In this embodiment, when the length of the first deformation segment 562 is less than half of the length of the first extension 56, the length of the first deformation segment 562 is relatively short. When the first deformation segment 562 is driven to deform, the stress on the end of the first deformation segment 562 near the connecting portion 55 is relatively large, which easily leads to mechanical fatigue and affects the service life. However, when the length of the first deformation segment 562 is greater than half of the length of the first extension 56, the length of the first deformation segment 562 is relatively long. When the first deformation segment 562 is driven to deform, the deformation angle of the first deformation segment 562 is small, and the contact pressure is small. Therefore, the length of the first deformation segment 562 is at least half of the length of the first extension 56. This not only ensures that the deformation angle of the first deformation segment 562 is large and the contact pressure is large, but also improves the problems of excessive stress when the length of the first deformation segment 562 is too short or low contact pressure when the length of the first deformation segment 562 is too long.

[0064] In this embodiment, at least one stationary lead-out end 32 is located at least partially within the groove 04, making full use of the space within the moving contact 50.

[0065] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A movable contact (50) of a snap-action relay, the movable contact (50) being provided with a fixed portion (531) fixed to an armature (40) and at least two extension portions (54) arranged at intervals in a Y-axis direction, characterized in that, At least one of the extension parts (54) is a first extension part (56) provided with a movable contact (02) at one end thereof away from the fixed part (531) along the X-axis direction, and at least one of the first extension part (56) and at least one adjacent extension part (54) is provided with a connecting part (55) located at least partially between the fixed part (531) and the movable contact (02) along the length direction of the extension part (54).

2. A snap action relay moving contact (50) as claimed in claim 1, characterized in that, The connecting part (55) is located at the middle of the length direction of the first extension part (56).

3. A snap action relay moving contact (50) as claimed in claim 2, characterized in that, The connecting part (55) extends along the Y-axis direction.

4. A snap action relay moving contact (50) as claimed in claim 3, characterized in that The connecting part (55) and the fixed part (531) and the corresponding two extension parts (54) form a positioning opening (01) for positioning, and the positioning opening (01) and the armature (40) at least partially overlap in the projection perpendicular to the thickness direction of the extension part (54).

5. A snap action relay moving contact (50) as claimed in claim 4, characterized in that the definitions The extension part (54) connected to the first extension part (56) through the connecting part (55) is a second extension part (57); the first extension part (56) is provided with a first connecting section (561) and a first deformation section (562) integrated along the length direction thereof, the second extension part (57) is provided with a second connecting section (571) and a second deformation section (572) integrated along the length direction thereof, the first connecting section (561) and the second connecting section (571) are integrated with the fixed part (531), and the first deformation section (562) is provided with the movable contact (02); the connecting part (55) and the side of the first connecting section (561) and the second connecting section (571) away from the fixed part (531) are integrated; the width of the first connecting section (561) and the second connecting section (571) is greater than the width of the first deformation section (562) and the second deformation section (572).

6. A snap action relay movable contact (50) as claimed in claim 5, characterized in that When the second extension part (57) is not provided with a movable contact (02), the width of the first deformation section (562) and the second connecting section (571) is greater than the width of the second deformation section (572), and the width of the first deformation section (562) is consistent with the width of the first connecting section (561).

7. A snap action relay moving contact (50) as claimed in claim 5 or 6, characterised in that, The length of the first deformation section (562) is at least half of the length of the first extension part (56).

8. A snap action relay movable contact (50) as claimed in claim 1, characterized in that, The extension part (54) connected to the first extension part (56) through the connecting part (55) is not provided with a movable contact (02).

9. A snap-action relay movement unit, characterized by The movable contact (50) of the relay comprising the armature (40) and as claimed in any one of claims 1-8.

10. A snap-action relay comprising a fixed unit and a moving unit, the fixed unit comprising a housing (10), a coil assembly (20) and a stationary contact (30), characterized in that The axis of the coil (22) of the coil assembly (20) extends along the Z-axis direction, the movement unit is arranged at the first end of the coil assembly (20) along the Z-axis direction and swings relative to the housing (10) and has at least a movement component along the Z-axis direction, the movement unit is as claimed in claim 9; the stationary contact (30) is provided with a stationary contact (31) corresponding to the movable contact (02) and a stationary lead (32) electrically connected to the stationary contact (31). The axis of the coil (22) of the coil assembly (20) extends along the Z-axis direction, the movement unit is arranged at the first end of the coil assembly (20) along the Z-axis direction and swings relative to the housing (10) and has at least a movement component along the Z-axis direction, the movement unit is as claimed in claim 9; the stationary contact (30) is provided with a stationary contact (31) corresponding to the movable contact (02) and a stationary lead (32) electrically connected to the stationary contact (31).

11. A snap-action relay according to claim 10, characterised in that The first extension part (56), the connecting part (55) and the extension part (54) connected with each other cooperate to form a groove (04) with an opening away from the fixing part (531), and the at least one static lead-out end (32) is at least partially located in the groove (04).

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