Multi-stage contact support frame and multi-stage contact mechanism

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a multistage contact support frame and a multistage contact mechanism, the multistage contact support frame comprises a support part and an installation part, the installation part is provided with first installation cavities distributed along a first direction and second installation cavities distributed along the first direction, the plurality of first installation cavities form a first layer, and the plurality of second installation cavities form a second layer. The first mounting cavities form a first layer, the second mounting cavities form a second layer, the first layer and the second layer are distributed along a second direction, the first mounting cavities are used for mounting moving contacts to realize one of a normally open function and a normally closed function, and the second mounting cavities are used for mounting moving contacts to realize the other one of the normally open function and the normally closed function; and only one of the first mounting cavity and the second mounting cavity corresponding to each other in the first layer and the second layer along the second direction is provided with the moving contact. According to the multi-stage contact support frame, the first layer and the second layer are combined, and only one of the first mounting cavity and the second mounting cavity which correspond to each other in the second direction is provided with the moving contact, so that random combination of a normally-open function and a normally-closed function can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a multi-stage contact support frame and a multi-stage contact mechanism. Background Art

[0002] Automatic control circuits require more and more contacts for signal output. Currently, most solutions are to use intermediate relays and accessories to meet user needs. However, the intermediate relay plus accessory expansion method has defects in the consistency of product action, resulting in structural instability.

[0003] In view of the above problems, a multi-stage contact mechanism is adopted in the prior art to solve the above problems, that is, multiple contacts are integrated on a multi-stage contact support frame, and multiple mounting cavities are arranged on the multi-stage contact support frame, and a moving contact is installed in the mounting cavity. In order to realize the normally open function or normally closed function of the moving contact, the moving contact includes a moving contact frame, a mounting seat and a spring, and the moving contact frame and the mounting seat are arranged in the mounting cavity at intervals along the moving direction of the moving contact, and the spring is clamped between the moving contact frame and the mounting seat. For example, when the moving contact with the normally open function is installed in the mounting cavity, the mounting seat abuts against the upper wall surface of the mounting cavity, and the moving contact frame abuts against the lower wall surface of the mounting cavity, so that when the multi-stage contact mechanism moves downward, the moving contact can contact with the static contact; when the moving contact with the normally closed function is installed in the mounting cavity, the mounting seat abuts against the lower wall surface of the mounting cavity, and the moving contact frame abuts against the upper wall surface of the mounting cavity, so that when the multi-stage contact mechanism moves downward, the moving contact is separated from the static contact.

[0004] In the above structure, the mounting seat is a part of the positioning spring. The position of the moving contact is changed by interchanging the position of the mounting seat and the moving contact frame, thereby realizing the switching of the normally open function and the normally closed function. For the convenience of installation, the mounting seat is clamped in the first mounting cavity. Since the mounting seat and the first mounting cavity are detachably connected, the mounting seat is unstable in installation and there is a risk of falling. The structure is unstable, and the number of parts is increased, which increases the cost. Utility Model Content

[0005] The utility model aims to provide a multi-stage contact support frame and a multi-stage contact mechanism, which have a stable structure and reduce costs.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A multi-stage contact support frame, comprising a supporting portion and a mounting portion arranged on the supporting portion, wherein the mounting portion is provided with a plurality of first mounting cavities and second mounting cavities distributed along a first direction, wherein the plurality of first mounting cavities constitute a first layer, and the plurality of second mounting cavities constitute a second layer, wherein the first layer and the second layer are distributed along a second direction, wherein the first mounting cavity is used to mount a moving contact to realize one of a normally open function and a normally closed function, and the second mounting cavity is used to mount the moving contact to realize the other of the normally open function and the normally closed function, and wherein only one of the first mounting cavity and the second mounting cavity corresponding to each other along the second direction in the first layer and the second layer is mounted with the moving contact;

[0008] A limiting boss is provided in both the first mounting cavity and the second mounting cavity. The moving contact comprises a moving contact frame and a spring. The moving contact frame is slidably disposed in the first mounting cavity or the second mounting cavity. Both ends of the spring are respectively limited between the limiting boss and the moving contact frame.

[0009] As an optional solution, the limiting boss in the first installation cavity is arranged on the upper inner wall of the first installation cavity along the second direction, and the limiting boss in the second installation cavity is arranged on the lower inner wall of the second installation cavity along the second direction.

[0010] As an optional solution, a limiting member is provided on the moving contact frame, the limiting member is connected to the moving contact frame, a fixing protrusion is provided on the side of the limiting member facing the spring, and both ends of the spring are respectively limited between the limiting boss and the fixing protrusion.

[0011] As an optional solution, a notch is provided on the partition plate between the first installation cavity and the second installation cavity corresponding to each other along the second direction, and a limiting block is provided on the side of the limiting member away from the spring, and the limiting block can be limited in the notch.

[0012] As an optional solution, an indicator is provided on the upper end surface of the mounting portion, and the indicator is used to follow the movement of the multi-stage contact support frame in the second direction to indicate the working state of the multi-stage contact support frame.

[0013] As an optional solution, a first connecting portion and a second connecting portion are respectively provided at two ends of the mounting portion along the first direction, and a width of the first connecting portion along the third direction is unequal to a width of the second connecting portion along the third direction.

[0014] As an optional scheme, the mounting portion includes a plurality of vertical mounting bodies arranged side by side in sequence along the first direction, each of the vertical mounting bodies is provided with the first mounting cavity and the second mounting cavity from top to bottom along the second direction, any two adjacent vertical mounting bodies are connected by connecting ribs, and a static contact support frame is provided in the outer shell, and a plurality of extension plates of the static contact support frame can respectively extend between any two adjacent vertical mounting bodies.

[0015] As an optional scheme, at least one group of two adjacent vertical mounting bodies among the plurality of the vertical mounting bodies are provided with first arc-shaped protrusions on opposite sides, and the extension plate can be clamped between the first arc-shaped protrusions on both sides; at least two of the plurality of connecting ribs are provided with second arc-shaped protrusions, and the two extension plates can respectively abut against the two second arc-shaped protrusions.

[0016] As an optional scheme, a hook and two positioning parts are provided on the lower end surface of the support part facing away from the mounting part, the hook and the positioning parts are spaced apart along the third direction, the two positioning parts are spaced apart along the first direction, the positioning parts are provided with positioning grooves, the two ends of the moving iron core along the first direction can be respectively limited in the two positioning grooves, and one end of the moving iron core along the third direction is limited on the hook.

[0017] A multi-stage contact mechanism comprises the multi-stage contact support frame described in any one of the above schemes.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a multi-stage contact support frame, including a supporting part and a mounting part arranged on the supporting part, wherein a first mounting cavity distributed along a first direction and a second mounting cavity distributed along the first direction are arranged on the mounting part, a plurality of first mounting cavities constitute a first layer, a plurality of second mounting cavities constitute a second layer, the first layer and the second layer are distributed along the second direction, the first mounting cavity is used to install a moving contact to realize one of a normally open function or a normally closed function, the second mounting cavity is used to install a moving contact to realize the other of a normally open function or a normally closed function, and only one of the first mounting cavity and the second mounting cavity corresponding to each other along the second direction in the first layer and the second layer is used to install a moving contact, and limiting bosses are arranged in the first mounting cavity and the second mounting cavity, and both ends of the spring of the moving contact are respectively limited between the limiting boss and the moving contact frame of the moving contact. The multi-stage contact support frame combines the first layer and the second layer, and only one of the corresponding first mounting cavity and the second mounting cavity along the second direction is installed with a moving contact, so that the normally open function and the normally closed function can be arbitrarily combined according to actual needs. That is, the combination of multiple first mounting cavities in the first layer and multiple second mounting cavities in the second layer replaces the multiple mounting cavities in the prior art, and one end of the spring is limited to the limiting boss to replace the mounting seat to limit the spring. The structure is more stable, the use of the mounting seat is reduced, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a multi-stage contact mechanism provided by an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the multi-stage contact mechanism provided by the embodiment of the utility model without the upper shell;

[0022] Figure 3 It is a structural schematic diagram of the multi-stage contact mechanism provided by the embodiment of the utility model without the upper housing and the upper static contact support frame;

[0023] Figure 4 yes Figure 3 The structural diagram at A in the middle;

[0024] Figure 5 The structure of the multi-stage contact support frame provided by the embodiment of the utility model is schematically shown. Figure 1 ;

[0025] Figure 6 The structure of the multi-stage contact support frame provided by the embodiment of the utility model is schematically shown. Figure 2 ;

[0026] Figure 7 It is a structural schematic diagram of the connection between the multi-stage contact support frame and the moving iron core provided by the embodiment of the utility model;

[0027] Figure 8It is a structural schematic diagram of the moving contact involved in the embodiment of the utility model.

[0028] In the figure:

[0029] 1. Multi-stage contact support frame; 11. Supporting part; 111. Hook; 112. Positioning part; 113. Strip-shaped protrusion; 114. Buffering protrusion; 12. Mounting part; 121. Vertical mounting body; 1210. Connecting rib; 1211. First mounting cavity; 1212. Second mounting cavity; 1213. Limiting boss; 1214. Partition plate; 1214a. Notch; 1215. First connecting part; 1216. Second connecting part; 1217. Third mounting cavity; 1218. First arc-shaped protrusion; 1219. Second arc-shaped protrusion; 122. Indicator; 13. Moving contact; 131. Moving contact frame; 132. Spring; 133. Limiting member; 1331. Limiting block; 14. Moving iron core;

[0030] 2. Shell; 21. Upper shell; 22. Lower shell; 221. Upper static contact support frame; 2211. Upper extension plate; 222. Lower static contact support frame; 223. Static contact. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0035] like Figure 1-Figure 3 As shown, an embodiment of the utility model provides a multi-stage contact support frame 1 and a multi-stage contact mechanism, the multi-stage contact mechanism includes a shell 2, a multi-stage contact support frame 1 provided by an embodiment of the utility model, and a moving iron core 14, wherein the multi-stage contact support frame 1 includes a supporting portion 11 and a mounting portion 12 arranged on the supporting portion 11, the moving iron core 14 is arranged on the lower end surface of the supporting portion 11, the mounting portion 12 is provided with a moving contact 13, a static contact support frame is provided on the shell 2, and the static contact 223 is provided on the static contact support frame, when the multi-stage contact support frame 1 moves back and forth along the second direction (i.e., the Z axis) driven by the moving iron core 14, the moving contact 13 and the static contact 223 can be attracted and separated.

[0036] The following is combined with Figure 4-Figure 7To illustrate the multi-stage contact support frame 1, an embodiment of the utility model provides a multi-stage contact support frame 1, which includes a support portion 11 and a mounting portion 12 arranged on the support portion 11, and the mounting portion 12 is provided with a plurality of first mounting cavities 1211 distributed along a first direction (i.e., the X-axis) and a second mounting cavity 1212 distributed along the first direction. The plurality of first mounting cavities 1211 constitute a first layer, and the plurality of second mounting cavities 1212 constitute a second layer. The first layer and the second layer are distributed along the second direction. The first mounting cavity 1211 can be used to install a moving contact 13 to realize one of a normally open function or a normally closed function, and the second mounting cavity 1212 can be used to install a moving contact 13 to realize the other of a normally open function or a normally closed function. The first mounting cavity 1211 and the second mounting cavity 1212 are arranged one by one, and only one of the first mounting cavity 1211 and the second mounting cavity 1212 corresponding to each other in the first layer and the second layer along the second direction is installed with a moving contact 13. It can be understood that the moving contact 13 is installed in one of the first mounting cavity 1211 or the second mounting cavity 1212 corresponding to each other along the second direction. For example, the moving contact 13 in the first mounting cavity 1211 can realize the normally open function, and the moving contact 13 in the second mounting cavity 1212 can realize the normally closed function. That is, if the normally open function is required at this position, the moving contact 13 only needs to be installed in the first mounting cavity 1211.

[0037] In this embodiment, the moving contact 13 in the first installation cavity 1211 is defined as a normally open moving contact 13 , and the moving contact 13 in the second installation cavity 1212 is defined as a normally closed moving contact 13 .

[0038] For example, the multiple first installation cavities 1211 of the first layer and the multiple second installation cavities 1212 of the second layer can be alternately staggered when installing the moving contacts 13, so that the normally open function and the normally closed function can be alternately distributed in sequence along the first direction; or, all the multiple first installation cavities 1211 of the first layer are installed with the moving contacts 13, and the multiple second installation cavities 1212 of the second layer are not installed with the moving contacts 13, so that all the normally open functions can be realized; or, all the multiple second installation cavities 1212 of the second layer are installed with the moving contacts 13, and the multiple first installation cavities 1211 of the first layer are not installed with the moving contacts 13, so that all the normally closed functions can be realized; or, the first several of the multiple first installation cavities 1211 of the first layer are installed with the moving contacts 13, and the latter several are not installed with the moving contacts 13, and the first several of the multiple first installation cavities 1211 of the second layer are not installed with the moving contacts 13, and the latter several are installed with the moving contacts 13, so that the front part along the first direction can realize the normally open function, and the rear part can realize the normally closed function. The above description is only for the convenience of understanding and is not limited thereto. It is sufficient to install the moving contact 13 in only one of the first installation cavity 1211 and the second installation cavity 1212 corresponding to each other along the second direction.

[0039] In order to facilitate the installation of the moving contact 13, a limiting boss 1213 is provided in both the first installation cavity 1211 and the second installation cavity 1212. The moving contact 13 includes a moving contact frame 131 and a spring 132. The moving contact frame 131 is slidably provided in the first installation cavity 1211 or the second installation cavity 1212. Both ends of the spring 132 are respectively limited between the limiting boss 1213 and the moving contact frame 131. The limiting boss 1213 is a fixed structure in the first installation cavity 1211 and the second installation cavity 1212. Therefore, the structure is stable when the spring 132 is limited.

[0040] The multi-stage contact support frame 1 combines the first layer and the second layer, and only one of the corresponding first mounting cavity 1211 and the second mounting cavity 1212 along the second direction is used to install the moving contact 13. The normally open function and the normally closed function can be arbitrarily combined according to actual needs. That is, the combination of multiple first mounting cavities 1211 in the first layer and multiple second mounting cavities 1212 in the second layer replaces the multiple mounting cavities in the prior art, and one end of the spring 132 is limited to the limiting boss 1213 to replace the mounting seat to limit the spring 132. The structure is more stable, the use of the mounting seat is reduced, and the cost is reduced.

[0041] Preferably, the limiting boss 1213 in the first mounting cavity 1211 is arranged on the upper inner wall of the first mounting cavity 1211 along the second direction, and the fixing boss in the second mounting cavity 1212 is arranged on the lower inner wall of the second mounting cavity 1212 along the second direction. This structure enables the moving contact frame 131 to be arranged toward the partition plate 1214 of the first mounting cavity 1211 and the second mounting cavity 1212 when the moving contact 13 is installed in the first mounting cavity 1211 or the second mounting cavity 1212. The static contact 223 can be arranged on the static contact support frame and located at a position lower than the partition plate 1214 corresponding to the moving contact 13, and the structural design is more reasonable.

[0042] Optionally, refer to Figure 8 As shown, a limiting member 133 is provided on the movable contact frame 131, and a fixing protrusion is provided on the side of the limiting member 133 facing the spring 132. Both ends of the spring 132 are respectively limited between the limiting boss 1213 and the fixing protrusion to make the limiting of the spring 132 more stable.

[0043] In this embodiment, the limiting boss 1213 is an oblong boss, and the fixing protrusion is a cylindrical boss.

[0044] Optionally, a limiting block 1331 is provided on a side of the limiting member 133 away from the spring 132 , and a notch 1214 a is provided on the partition plate 1214 . The limiting block 1331 can be limited in the notch 1214 a to position the moving contact 13 .

[0045] The mounting portion 12 is also provided with a plurality of third mounting cavities 1217 distributed along the first direction, and the plurality of third mounting cavities 1217 constitute a third layer, and the third layer is provided below the second layer along the second direction, and a moving contact 13 is provided in the third mounting cavity 1217 to realize a normally open function or a normally closed function, and a limiting boss 1213 is also provided in the third mounting cavity 1217, and the limiting boss 1213 can be provided on the upper inner wall or the lower inner wall of the third mounting cavity 1217 according to user needs to realize a normally open function or a normally closed function. It can be understood that the normally open function or the normally closed function of the moving contact 13 in the third mounting cavity 1217 is determined by the position of the limiting boss 1213.

[0046] In this embodiment, the moving contact 13 in the third installation cavity 1217 is normally open. The multi-stage contact support frame 1 installs all the normally open moving contacts 13 through the third installation cavity 1217 of the third layer, and cooperates with the first and second layers to install the moving contacts 13, so as to realize any combination of normally open or normally closed.

[0047] Refer to Figure 1-Figure 3 The housing 2 includes an upper shell 21 and a lower shell 22 which are connected to each other. The multi-stage contact support frame 1 is slidably arranged in the lower shell 22 along the second direction. The static contact support frame includes an upper static contact support frame 221 and a lower static contact support frame 222. The lower static contact support frame 222 is arranged in the lower shell 22 for installing a static contact 223 corresponding to the third layer. The upper static contact support frame 221 is arranged on the lower static contact support frame 222 for installing a static contact 223 corresponding to the first layer and the second layer. The upper shell 21 covers the lower shell 22.

[0048] Optionally, an indicator 122 is provided on the upper end surface of the mounting portion 12, and a through hole is provided on the upper shell 21. When the multi-stage contact support frame 1 is in a released state, that is, the multi-stage contact support frame 1 is located at the uppermost portion of the lower shell 22 along the second direction, the indicator 122 protrudes from the through hole to remind the user; when the multi-stage contact support frame 1 is in a closed state, that is, the multi-stage contact support frame 1 is located at the lowermost portion of the lower shell 22 along the second direction, the indicator 122 is located in the through hole to remind the user. The indicator 122 can indicate the working state of the multi-stage contact mechanism, and is more convenient to use.

[0049] like Figure 5As shown, the mounting portion 12 is provided with a first connection portion 1215 and a second connection portion 1216 at both ends along the first direction, and the width of the first connection portion 1215 along the third direction (i.e., the Y axis) is not equal to the width of the second connection portion 1216 along the third direction, and this structure can prevent the multi-stage contact support frame 1 from being installed in reverse position. In this embodiment, the lower housing 22 is provided with a first connection groove and a second connection groove at both ends along the first direction, and the width of the first connection groove matches the width of the first connection portion 1215, and the width of the second connection groove matches the width of the second connection groove, which can effectively prevent the multi-stage contact support frame 1 from being installed in reverse position.

[0050] The mounting portion 12 includes a plurality of vertical mounting bodies 121 arranged in sequence and side by side along a first direction, each vertical mounting body 121 is provided with a first mounting cavity 1211, a second mounting cavity 1212 and a third mounting cavity 1217 from top to bottom along a second direction, any two adjacent vertical mounting bodies 121 are connected by connecting ribs 1210, and the extension plates of the static contact support frame can extend into between any two adjacent vertical mounting bodies 121 respectively. In this embodiment, the static contact support frame includes a lower static contact support frame 222 and an upper static contact support frame 221, and the extension plate includes an upper extension plate 2211 and a lower extension plate, the upper extension plate 2211 is arranged on the upper static contact support frame 221, and the lower extension plate is arranged on the lower static contact support frame 222, that is, the multiple upper extension plates 2211 of the upper static contact support frame 221 can respectively extend between any two adjacent vertical mounting bodies 121, and the multiple lower extension plates of the lower static contact support frame 222 can respectively extend between any two adjacent vertical mounting bodies 121.

[0051] At least one group of two adjacent vertical mounting bodies 121 in the plurality of vertical mounting bodies 121 is provided with a first arc-shaped protrusion 1218 on the opposite side. The first arc-shaped protrusion 1218 is provided on the upper part of the multi-stage contact support frame 1 and corresponds to the upper static contact support frame 221. The upper extension plate 2211 can be clamped between the first arc-shaped protrusions 1218 on both sides. Two first arc-shaped protrusions 1218 can be arranged at intervals along the second direction. At least two connecting ribs 1210 in the plurality of connecting ribs 1210 are provided with a second arc-shaped protrusion 1219. The two lower extension plates can respectively abut against the two second arc-shaped protrusions 1219. Preferably, the two second arc-shaped protrusions 1219 at the most edge along the first direction are respectively provided, and the structure is more reasonable. The first arc-shaped protrusion 1218 and the second arc-shaped protrusion 1219 can play an auxiliary positioning role for the multi-stage contact support frame 1, and reduce the wear of the main body of the multi-stage contact support frame 1, so that the movement is more balanced and stable, and the service life is improved.

[0052] Optionally, a chamfer is provided at the connection between the support portion 11 and the vertical mounting body 121 to improve the firmness of the multi-stage contact support frame 1 .

[0053] Alternatively, if Figure 6-Figure 7 As shown, the lower end surface of the support portion 11 facing away from the mounting portion 12 is used to mount the moving iron core 14, and the lower end surface of the support portion 11 is provided with a hook 111 and two positioning portions 112, the hook 111 and the positioning portions 112 are spaced apart along the third direction, the two positioning portions 112 are spaced apart along the first direction, and positioning grooves are provided on the opposite sides of the two positioning portions 112, and the moving iron core 14 can be inserted into the positioning grooves on both sides along the third direction, and step surfaces are provided at both ends of the moving iron core 14 along the third direction, and the hook 111 can clamp one end of the moving iron core 14 along the third direction, that is, the two ends of the moving iron core 14 along the first direction are respectively limited in the two limiting grooves, and the moving iron core 14 is respectively limited between the hook 111 and the step surface along the third direction.

[0054] The support portion 11 is provided with two grooves, which are provided at two sides of the hook 111 along the first direction, so that the hook 111 can be elastically connected to the support portion 11 .

[0055] The lower end surface of the support portion 11 is provided with two groups of strip-shaped protrusions 113, which extend along the third direction. The two groups of strip-shaped protrusions 113 are respectively located in the positioning grooves, and the strip-shaped protrusions 113 support the moving iron core 14 so that the moving iron core 14 is stably clamped. In order to facilitate the installation of the moving iron core 14, the strip-shaped protrusions 113 are provided with an inclined surface on one side facing the hook 111 to facilitate the sliding of the moving iron core 14. In this embodiment, each group of strip-shaped protrusions 113 is provided with two strip-shaped protrusions 113.

[0056] The lower end surface of the support portion 11 is also provided with two buffer protrusions 114, and the positioning portion 112 and the strip protrusion 113 are both provided with buffer protrusions 114, so that the moving iron core 14 has a buffer gap with the lower end surface of the support portion 11 during installation, thereby avoiding hard contact between the moving iron core 14 and the lower end surface of the support portion 11, reducing collision energy and increasing service life.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A multi-stage contact support frame, characterized in that: The invention comprises a support portion (11) and a mounting portion (12) arranged on the support portion (11); the mounting portion (12) is provided with a plurality of first mounting cavities (1211) and second mounting cavities (1212) distributed along a first direction; the plurality of first mounting cavities (1211) constitute a first layer; the plurality of second mounting cavities (1212) constitute a second layer; the first layer and the second layer are distributed along a second direction; the first mounting cavity (1211) is used to mount a moving contact (13) to realize one of a normally open function and a normally closed function; the second mounting cavity (1212) is used to mount the moving contact (13) to realize the other of the normally open function and the normally closed function; and only one of the first mounting cavity (1211) and the second mounting cavity (1212) corresponding to each other in the first layer and the second layer along the second direction is used to mount the moving contact (13); A limiting boss (1213) is provided in both the first mounting cavity (1211) and the second mounting cavity (1212); the moving contact (13) comprises a moving contact frame (131) and a spring (132); the moving contact frame (131) is slidably disposed in the first mounting cavity (1211) or the second mounting cavity (1212); and two ends of the spring (132) are respectively limited between the limiting boss (1213) and the moving contact frame (131).

2. The multi-stage contact support according to claim 1, characterized in that: The limiting boss (1213) in the first installation cavity (1211) is arranged on the upper inner wall of the first installation cavity (1211) along the second direction, and the limiting boss (1213) in the second installation cavity (1212) is arranged on the lower inner wall of the second installation cavity (1212) along the second direction.

3. The multi-stage contact support according to claim 1, characterized in that: A limiting member (133) is provided on the moving contact frame (131), the limiting member (133) being connected to the moving contact frame (131), a fixing protrusion being provided on one side of the limiting member (133) facing the spring (132), and two ends of the spring (132) are respectively limited between the limiting boss (1213) and the fixing protrusion.

4. The multi-stage contact support frame according to claim 3, characterized in that: A notch (1214a) is provided on the partition plate (1214) between the first installation cavity (1211) and the second installation cavity (1212) corresponding to each other along the second direction, and a limiting block (1331) is provided on the side of the limiting member (133) facing away from the spring (132), and the limiting block (1331) can be limited in the notch (1214a).

5. The multi-stage contact support frame according to claim 1, characterized in that: An indicator (122) is provided on the upper end surface of the mounting portion (12), and the indicator (122) is used to follow the movement of the multi-stage contact support frame (1) in the second direction to indicate the working state of the multi-stage contact support frame (1).

6. The multi-stage contact support according to claim 1, characterized in that: The mounting portion (12) is provided with a first connecting portion (1215) and a second connecting portion (1216) at two ends along the first direction, respectively; the width of the first connecting portion (1215) along the third direction is unequal to the width of the second connecting portion (1216) along the third direction.

7. The multi-stage contact support frame according to claim 1, characterized in that: The mounting portion (12) comprises a plurality of vertical mounting bodies (121) arranged in sequence and side by side along the first direction, each of the vertical mounting bodies (121) being provided with the first mounting cavity (1211) and the second mounting cavity (1212) from top to bottom along the second direction, any two adjacent vertical mounting bodies (121) being connected via a connecting rib (1210), a stationary contact support frame being provided in the housing (2), and a plurality of extension plates of the stationary contact support frame being capable of respectively extending between any two adjacent vertical mounting bodies (121).

8. The multi-stage contact support frame according to claim 7, characterized in that: At least one group of two adjacent vertical mounting bodies (121) among the plurality of vertical mounting bodies (121) are provided with first arc-shaped protrusions (1218) on opposite sides, and the extension plate can be clamped between the first arc-shaped protrusions (1218) on both sides; at least two of the plurality of connecting ribs (1210) are provided with second arc-shaped protrusions (1219), and the two extension plates can respectively abut against the two second arc-shaped protrusions (1219).

9. The multi-stage contact support frame according to claim 1, characterized in that: A hook (111) and two positioning portions (112) are provided on the lower end surface of the support portion (11) facing away from the mounting portion (12); the hook (111) and the positioning portions (112) are arranged at intervals along the third direction; the two positioning portions (112) are arranged at intervals along the first direction; the positioning portions (112) are provided with positioning grooves; the two ends of the moving iron core (14) along the first direction can be respectively limited in the two positioning grooves, and one end of the moving iron core (14) along the third direction is limited on the hook (111).

10. A multi-stage contact mechanism, characterized in that: The multi-stage contact support frame comprises the multi-stage contact support frame as described in any one of claims 1 to 9.

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