Auxiliary contact module and contactor

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and discloses an auxiliary contact module and a contactor, the auxiliary contact module comprises a shell, a support assembly and a microswitch, the microswitch can simultaneously meet the requirements of a conventional load and working occasions with low voltage, low current, much dust, moisture, vibration and the like, and the weak current connection reliability is strong; a contact plate and a circuit board assembly are fixed on the shell, the circuit board assembly and the microswitch are fixedly stacked and are in conductive connection, and the shell can protect the microswitch to be normally switched on and switched off and is not interfered by external force; the circuit board assembly is connected with the contact plate through the elastic wiring piece, so that the connection process difficulty and the assembly precision requirement are reduced; the supporting assembly is provided with the contact part, the supporting assembly is in sliding connection with the shell, the contact part can trigger the microswitch, the auxiliary contact module has the advantages of being simple in structure and convenient and fast to assemble, and the overall reliability of the contactor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an auxiliary contact module and a contactor. Background Art

[0002] A contactor is one of the main low-voltage components for controlling motors, and its main function is to remotely and frequently connect, disconnect, and carry motor circuits or power distribution circuits. As a component that plays a major role in transmitting and connecting in a circuit, an auxiliary contact module is a common accessory on a contactor. Generally, it is hung on the top or side of the contactor and moves together with the action of the contactor. It is often used to control other electrical equipment or detect the working state of other circuits.

[0003] With the development of modern electronic technology, the requirements for the weak-current connection ability for transmitting control signals, data signals, communication signals, etc. are getting higher and higher. The application environment of contactors is becoming more and more complex and harsh, and the requirements for the weak-current connection reliability of auxiliary contact modules are also getting higher and higher. For example, it is required that the auxiliary contact module can work reliably under conditions such as low voltage, small current, multi-dust, and humidity. At present, most of the auxiliary contact modules on the market adopt conventional direct-acting double-contact contacts. Such contact modules have been shown to be unable to reliably conduct low-voltage and low-current loads in actual work. Moreover, the assembly structure of such auxiliary contact modules is complex, and it is difficult for workers to quickly and accurately dock and assemble, which affects the structural stability, and the process and maintenance costs are relatively high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an auxiliary contact module and a contactor, which have a simple structure and are convenient to assemble; can reliably conduct low-voltage and low-current loads in a harsh application environment, thereby improving the overall reliability of the contactor.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] An auxiliary contact module, comprising:

[0007] A housing, in which a circuit board assembly is provided;

[0008] A contact plate, arranged in the housing, the contact plate is connected to the circuit board assembly through a wiring member, and the wiring member can elastically deform;

[0009] A support assembly, slidably connected to the housing, the support assembly has a contact portion;

[0010] A microswitch, the microswitch is placed in the housing, the microswitch is electrically connected to the circuit board assembly, and the support assembly slides relative to the housing, so that the contact portion can trigger the microswitch.

[0011] As an alternative technical solution of the auxiliary contact module, the auxiliary contact module includes a plurality of the microswitches, and the number of the contact parts is the same as that of the microswitches and they are arranged in one-to-one correspondence.

[0012] As an alternative technical solution of the auxiliary contact module, the microswitches are arranged on the circuit board assembly, and a plurality of the contact parts are arranged flush; the microswitches include a normally closed loop microswitch and a normally open loop microswitch, an insulating part is arranged between the normally closed loop microswitch and the circuit board assembly, and the normally closed loop microswitch is arranged closer to the contact part than the normally open loop microswitch.

[0013] As an alternative technical solution of the auxiliary contact module, both ends of the wiring part are welded to the circuit board assembly and the contact plate respectively.

[0014] As an alternative technical solution of the auxiliary contact module, the contact plate is provided with a first through hole, the wiring part is provided with a wiring flange, the wiring flange is provided with a second through hole, the wiring flange is attached to the contact plate, the first through hole and the second through hole are concentrically aligned, and both the first through hole and the second through hole are used for inserting a contact bolt.

[0015] As an alternative technical solution of the auxiliary contact module, the support assembly includes a sliding part, a driving part and an elastic part, the sliding part is slidably connected with the housing in the vertical direction, the driving part is elastically connected with the sliding part through the elastic part, the driving part and the sliding part can move relative to each other along the working direction, and the contact part is arranged on the driving part.

[0016] As an alternative technical solution of the auxiliary contact module, the sliding part is provided with a guiding part, the inner wall of the housing is provided with a slide rail, the slide rail extends in the vertical direction, and the guiding part slides in the slide rail.

[0017] As an alternative technical solution of the auxiliary contact module, a control part is arranged at the bottom end of the sliding part, a control window is arranged at the bottom of the housing, and the control part protrudes from the control window for connecting with the contactor body.

[0018] As an alternative technical solution of the auxiliary contact module, a signal window is arranged on the housing, the support assembly has a protruding part, when the contact part does not trigger the microswitch, the protruding part is placed in the signal window; and / or

[0019] When the contact part triggers the microswitch, the protruding part is placed in the housing;.

[0020] A contactor, including a contactor body and the auxiliary contact module as described in any one of the above, and the auxiliary contact module is hung on the contactor body.

[0021] Advantages of the present utility model:

[0022] The auxiliary contact module provided by the present utility model includes a housing, a support assembly, and a microswitch. The contact configuration of the microswitch can meet the usage requirements of different load levels, especially in working scenarios that simultaneously require conventional loads and low voltage, low current, multi-dust, humid, and vibrating environments. The reliability of weak current conduction is strong. The contact plate is fixed inside the housing, and a circuit board assembly is also installed inside the housing. The circuit board assembly and the microswitch are fixedly stacked, and the microswitch is electrically connected to the circuit board assembly. The housing can protect the normal opening and closing of the microswitch from external force interference. The circuit board assembly and the contact plate are connected by an elastically deformable wiring member, which ensures the connection firmness while improving the connection freedom, reducing the connection process difficulty and dimensional accuracy requirements, and facilitating assembly. The support assembly has a contact part, and the support assembly is slidably connected to the housing, which can trigger the microswitch with the contact part. This auxiliary contact module has the characteristics of simple structure and convenient assembly.

[0023] The contactor provided by the present utility model includes the above-mentioned auxiliary contact module, which can reliably conduct low voltage and low current loads in a harsh application environment, thereby improving the overall reliability of the contactor. Description of the Drawings

[0024] Figure 1 Fig. is a schematic structural view of the auxiliary contact module provided by the specific embodiment of the present utility model from the first perspective;

[0025] Figure 2 Fig. is a sectional view of the auxiliary contact module provided by the specific embodiment of the present utility model regarding the normally open loop microswitch;

[0026] Figure 3 Fig. is a sectional view of the auxiliary contact module provided by the specific embodiment of the present utility model regarding the normally closed loop microswitch;

[0027] Figure 4 Fig. is a schematic structural view of the support assembly of the auxiliary contact module provided by the specific embodiment of the present utility model;

[0028] Figure 5 Fig. is a schematic structural view of the auxiliary contact module provided by the specific embodiment of the present utility model from the second perspective;

[0029] Figure 6 Fig. is a schematic structural view of the housing of the auxiliary contact module provided by the specific embodiment of the present utility model.

[0030] In the figure:

[0031] 100. Housing; 101. Signal window; 102. Slide rail; 103. Control window; 110. Circuit board assembly; 120. Contact plate; 121. Contact bolt; 130. Wiring component; 131. Wiring flange

[0032] 200. Support assembly; 201. Protrusion; 210. Sliding member; 211. Guide sliding part; 212. Control part; 220. Driving member; 221. Contact part; 230. Elastic member

[0033] 300. Microswitch; 310. Button; 320. Push rod; 400. Insulating member Detailed implementation manners

[0034] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings

[0035] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations

[0036] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature

[0037] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] As Figures 1 to 3 shown, the present utility model discloses an auxiliary contact module, which includes a housing 100, a support assembly 200, and a micro switch 300. The contact configuration of the micro switch 300 can meet the usage requirements of different load levels, especially in working occasions that simultaneously require conventional loads and low voltage, low current, multi-dust, humidity, vibration, etc. The reliability of weak current connection is strong. A contact plate 120 is fixed to the housing 100. A circuit board assembly 110 is provided in the housing 100. The circuit board assembly 110 is connected to the contact plate 120 through a wiring member 130. Without affecting the connection firmness with the circuit board assembly 110, the wiring member 130 can have a certain elastic deformation ability, making the connection between the wiring member 130 and the circuit board assembly 110 and the contact plate 120 more free and flexible, reducing the process difficulty and assembly difficulty. The micro switch 300 is placed in the housing 100 and is electrically connected to the circuit board assembly 110. The housing 100 can protect the normal opening and closing of the micro switch 300 from external force interference. The support assembly 200 has a contact portion 221. The support assembly 200 is slidably connected to the housing 100 along the vertical working direction, and can make the contact portion 221 trigger the micro switch 300. This auxiliary contact module has the characteristics of simple structure and convenient assembly, and can stably and reliably switch between the on state and the off state.

[0039] Exemplarily, the wiring member 130 is an elastic thin sheet. The two ends of the wiring member 130 are respectively welded to the circuit board assembly 110 and the contact plate 120. There is no strict flatness requirement for the welding position, further reducing the process difficulty. At the same time, it can be deformed, so that the requirement for the matching dimension accuracy during assembly is low, which is beneficial to assembly.

[0040] In this embodiment, the contact plate 120 is provided with a first through hole. The wiring member 130 is provided with a wiring flange 131. A second through hole is provided on the wiring flange 131. The wiring flange 131 is arranged in parallel and in contact with the contact plate 120, further strengthening the connection and installation of the wiring member 130 and the contact plate 120, and ensuring the stability of conduction. And the first through hole and the second through hole are concentrically aligned. Both the first through hole and the second through hole are used for inserting a contact bolt 121.

[0041] Optionally, the auxiliary contact module may provide at least one set of micro switches 300 and contact parts 221, which is beneficial to the overall layout of the contactor and can assist in protecting a variety of independent high-protection weak-current contact combination loop types, such as: 1NO1NC loop, 2NO loop, 2NC loop, 1NC loop and NO loop. And since each pole loop uses a separate micro switch 300, the provided loops are all independent of each other, further ensuring the system accuracy and independence of using this auxiliary contact module.

[0042] Specifically, the auxiliary contact module includes a number of micro switches 300, and the number of contact parts 221 is the same as that of the micro switches 300 and they are arranged in one-to-one correspondence. The micro switches 300 are arranged on the circuit board assembly 110, and a plurality of contact parts 221 are arranged flush. The micro switch 300 includes a normally closed loop micro switch and a normally open loop micro switch. An insulating part 400 is arranged between the normally closed loop micro switch and the circuit board assembly 110, and the normally closed loop micro switch is arranged closer to the contact part 221 than the normally open loop micro switch. Exemplarily, for a product with a 1NO1NC combined loop type, a flaky insulating part 400 is added between the normally closed loop micro switch of the NC loop and the circuit board assembly 110, so as to ensure that the normally closed loop micro switch of the NC loop contacts the contact part 221 first to switch the loop off, and then the normally open loop micro switch of the NO loop contacts the contact part 221 to conduct the loop, making the signal acquisition more accurate and the system accuracy of the comprehensive judgment of the NO loop and NC loop using this auxiliary contact module higher.

[0043] Furthermore, welding the micro switch 300 to the circuit board assembly 110 can effectively ensure the structural stability of the auxiliary contact module and make the connection between the micro switch 300 and the circuit board assembly 110 more stable. If an insulating part 400 is clamped between the micro switch 300 and the circuit board assembly 110, a connecting piece can be passed through the insulating part 400, and the two ends of the connecting piece are respectively welded to the micro switch 300 and the circuit board assembly 110.

[0044] Such as Figure 4As shown in the figure, the support component 200 includes a slider 210, a driving member 220, and an elastic member 230. The slider 210 is slidably connected to the housing 100 along the vertical working direction. The driving member 220 is elastically connected to the slider 210 through the elastic member 230. The driving member 220 and the slider 210 can move relative to each other in the vertical direction. A contact portion 221 is provided on the driving member 220. Specifically, the contact portion 221 is above the microswitch 300. When the slider 210 drives the entire support component 200 to move downward towards the microswitch 300, the driving member 220 abuts and presses on the microswitch 300. At the same time, the slider 210 can continue to move downward against the force of the elastic member 230, thereby converting the long stroke of the slider 210 into the short stroke of the driving member 220, avoiding the jamming or breakage phenomenon that may occur during the relative movement between the support component 200 and the microswitch 300.

[0045] As Figures 4 to 6 shown in the figure, a control window 103 is provided at the bottom of the housing 100, and a control portion 212 is provided at the bottom end of the slider 210. The control portion 212 protrudes from the control window 103 and is used to connect to the contactor body, control the support component 200, and provide power for the vertical movement of the support component 200. In this embodiment, the slider 210 is provided with a guiding portion 211, and the inner wall of the housing 100 is configured with a slide rail 102. The slide rail 102 extends along the vertical direction. The guiding portion 211 can be slidably placed in the slide rail 102 to drive the slider 210 and the contact portion 221 to reciprocate in the vertical direction, further stabilizing the relative movement between the support component 200 and the housing 100, and ensuring the stable conversion of pressing or avoiding the microswitch 300.

[0046] Exemplarily, a button 310 and a push rod 320 are provided on the top of the body of the microswitch 300. One end of the push rod 320 is rotatably connected to the body, the middle of the push rod 320 is lapped on the button 310, and the other end of the push rod 320 is upturned and faces the contact portion 221. The driving member 220 moves up and down with the slider 210, contacts or separates from the push rod 320 of the microswitch 300, and can drive the push rod 320 to easily and labor-savingly press or release the button 310, so as to conveniently and controllably convert the pressing or avoiding of the microswitch 300 and realize the on and off of the auxiliary contact module.

[0047] Specifically, a signal window 101 is opened at the top of the housing 100, and a protruding portion 201 is correspondingly provided at the bottom of the support component 200. When the support component 200 moves downward, the contact portion 221 presses and triggers the microswitch 300. At this time, the protruding portion 201 is placed inside the housing 100, and the auxiliary contact module is in the on state; when the support component 200 moves upward, the contact portion 221 avoids triggering the microswitch 300, and the protruding portion 201 is placed inside the signal window 101, and the auxiliary contact module is in the off state, which is convenient for observing the real-time state of the auxiliary contact module.

[0048] The utility model discloses a contactor, which comprises a contactor body and the above-mentioned auxiliary contact module. The auxiliary contact module is hung on the contactor body and is connected with the main contact of the contactor to realize the linkage of the on-off of the contactor, and can reliably conduct low-voltage and low-current loads in a harsh application environment, thereby improving the overall reliability of the contactor with the ability to connect weak electricity.

[0049] Specifically, the contactor further comprises a contact system, an electromagnetic system, a reaction force module, etc. The contact system is located at the upper part of the contactor, and the electromagnetic system is located at the lower part of the contactor. The electromagnetic system comprises a control circuit and a clapper armature. When the control circuit coil is powered on, the electromagnetic system generates suction force, and the clapper armature drives the support assembly 200 to move vertically downward to press the contact part 221 against the micro switch 300, and the contactor contact is conducted; when the control circuit coil is powered off, the suction force of the electromagnetic system disappears, the clapper armature is released, and the reaction force module drives the support assembly 200 to move vertically upward to make the contact part 221 avoid the micro switch 300, and the contactor contact is disconnected.

[0050] Obviously, the above embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. Auxiliary contact module, characterized in that: include: A housing (100), wherein a circuit board assembly (110) is arranged in the housing (100); A contact plate (120) is disposed in the housing (100), the contact plate (120) is connected to the circuit board assembly (110) via a wiring member (130), and the wiring member (130) is elastically deformable; A support component (200) is slidably connected to the housing (100), and the support component (200) has a contact portion (221); A micro switch (300) is disposed in the housing (100), the micro switch (300) is conductively connected to the circuit board assembly (110), and the support assembly (200) slides relative to the housing (100) so that the contact portion (221) triggers the micro switch (300).

2. The auxiliary contact module according to claim 1, characterized in that: The auxiliary contact module comprises a plurality of micro switches (300), and the contact portions (221) are the same in number as the micro switches (300) and are arranged in a one-to-one correspondence.

3. The auxiliary contact module according to claim 2, characterized in that: The micro switch (300) is arranged on the circuit board assembly (110), and the plurality of contact portions (221) are arranged flush with each other; the micro switch (300) comprises a normally closed circuit micro switch and a normally open circuit micro switch, an insulating member (400) is arranged between the normally closed circuit micro switch and the circuit board assembly (110), and the normally closed circuit micro switch is closer to the contact portion (221) than the normally open circuit micro switch.

4. The auxiliary contact module according to claim 1, characterized in that: Two ends of the connection piece (130) are respectively welded to the circuit board assembly (110) and the contact plate (120).

5. The auxiliary contact module according to claim 1, characterized in that: The contact plate (120) is provided with a first through hole, the wiring member (130) is provided with a wiring flange (131), the wiring flange (131) is provided with a second through hole, the wiring flange (131) is arranged in close contact with the contact plate (120), the first through hole is concentrically opposite to the second through hole, and the first through hole and the second through hole are both used for inserting the contact bolt (121).

6. The auxiliary contact module according to claim 1, characterized in that: The supporting assembly (200) comprises a sliding member (210), a driving member (220) and an elastic member (230); the sliding member (210) is slidably connected to the housing (100) along a working direction; the driving member (220) is elastically connected to the sliding member (210) via the elastic member (230); the driving member (220) and the sliding member (210) can move relative to each other in a vertical direction; and the contact portion (221) is provided on the driving member (220).

7. The auxiliary contact module according to claim 6, characterized in that: The sliding member (210) is provided with a sliding guide portion (211), the inner wall of the housing (100) is provided with a sliding rail (102), the sliding rail (102) is extended in a vertical direction, and the sliding guide portion (211) is slidably arranged in the sliding rail (102).

8. The auxiliary contact module according to claim 6, characterized in that: A control portion (212) is provided at the bottom end of the sliding member (210), a control window (103) is provided at the bottom of the housing (100), and the control portion (212) is protruding from the control window (103) and is used for connecting to a contactor body.

9. The auxiliary contact module according to any one of claims 1 to 8, characterized in that: The housing (100) is provided with a signal window (101), the support component (200) has a protrusion (201), and when the contact portion (221) does not trigger the micro switch (300), the protrusion (201) is placed in the signal window (101); and / or When the contact portion (221) triggers the micro switch (300), the protrusion (201) is placed inside the housing (100).

10. A contactor, characterized in that It comprises a contactor body and the auxiliary contact module according to any one of claims 1 to 9, wherein the auxiliary contact module is mounted on the contactor body.

Images