A magnetic latching relay with micro switch

Abstract

The present invention discloses a magnetic latching relay with a micro switch, comprising an insulating housing and a micro switch, wherein the insulating housing is formed by a base and a cover body being fixedly connected, an armature assembly being pivotally connected to the base, and an assembly area for accommodating the micro switch being provided at one end of the base near the armature assembly, the micro switch housing abutting against the bottom of the assembly area and being positioned by the assembly area, a part of the micro switch housing near the armature assembly being suspended, and the suspended lower space of the micro switch housing giving way to the movement of the armature assembly and / or a push card, and the cover body pressing the micro switch housing; a pressure rod extending from one end of the armature assembly to one side of the cover body, and when the armature assembly rotates, the pressure rod pressing the micro switch touch spring or releasing the micro switch touch spring. Furthermore, two positioning columns are provided at the bottom of the assembly area, and each of the positioning columns is inserted into a mounting hole on the micro switch. The present invention has a compact structure, so that the magnetic latching relay with an additional micro switch is small in size.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic latching relay manufacturing, in particular to a magnetic latching relay with a micro switch. Background Art

[0002] The magnetic latching relay is a new type of relay developed in recent years, and is also an automatic switch. Like other electromagnetic relays, it automatically connects and disconnects the circuit. The difference is that the normally closed or normally open state of the magnetic latching relay is completely dependent on the action of the permanent magnet, and the switching state conversion is completed by triggering a pulse electrical signal of a certain width.

[0003] Existing magnetic latching relays usually include a plastic housing, multiple conductive lead pins, a magnetic circuit system, a contact system and a driving mechanism. Multiple conductive lead pins, a magnetic circuit system, a contact system and a driving mechanism are all mounted on the plastic housing. The magnetic circuit system usually includes a yoke, a coil, and an armature assembly. The contact system includes a moving spring and a static spring. The moving spring has a moving contact, and the static spring has a static contact. The driving mechanism includes a driving card. The armature assembly is connected to the driving card, and the driving card is connected to the moving spring part. One end of the conductive lead pin in the housing is fixedly connected to the moving spring and the static spring. When the relay coil is connected to a positive pulse voltage, the magnetic circuit system works, the armature assembly drives the driving card, and the driving card drives the moving spring to shift, so that the moving contact contacts the static contact, and the relay is in a connected state; when the relay coil is connected to a reverse pulse voltage, the magnetic circuit system works again, the armature assembly drives the driving card to return, and the driving card drives the moving spring to return, so that the moving contact is separated from the static contact, so that the contact is disconnected, and the relay is in a disconnected state.

[0004] In order to determine whether the moving contact and the stationary contact of the magnetic latching relay are in a connected state or a separated state, a micro switch is provided in some magnetic latching relays, and the state between the moving contact and the stationary contact is determined by the closing or opening of the micro switch contacts.

[0005] For example, on October 3, 2012, a Chinese invention patent application with the patent number ZL201210198058.2 and the name "Three-way closed force magnetic latching relay capable of monitoring the opening and closing states of moving and static contacts" was published. It includes a housing, a coil assembly, a rotating armature assembly, a combined push card, a moving spring, a moving contact and a static contact. A compressed double spring is provided behind the moving contact on the moving spring, and the double spring is connected as a whole by two spiral springs through the bottom steel wire; a "Z"-shaped pressure spring is also provided behind the moving contact on the moving spring, and the upper part of the pressure spring is attached to the surface of the moving spring behind the moving contact, and the lower part is inserted into the combined push card; a convex block is provided on the upper surface of the combined push card; a micro switch connected to an external display device is provided on the housing corresponding to the position of the convex block. This invention application has the function of monitoring the opening and closing states of the moving and static contacts, so that the external display device can display whether it is in a closed or open state. However, since the magnetic latching relay is additionally provided with a micro switch, the volume of the magnetic latching relay housing is increased, making it more difficult to arrange the magnetic latching relay with the micro switch on the electrical equipment. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a magnetic latching relay with a micro switch, which has a compact structure, so that the magnetic latching relay with the micro switch is small in size and is conducive to the automatic assembly of the micro switch.

[0007] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a magnetic latching relay with a micro switch, comprising an insulating housing and a micro switch, the insulating housing is formed by a base and a cover body being fixedly connected, a magnetic circuit system, a push card and a contact system are mounted on the base, the magnetic circuit system comprises an armature assembly, the middle part of the armature assembly is pivotally connected to the base, the contact system comprises a moving contact and a static contact, the armature assembly is connected to the push card and drives the moving contact of the contact system through the push card so that the moving contact is engaged or separated with the static contact, the base is provided with an assembly area for accommodating the micro switch near one end of the armature assembly, the bottom surface of the micro switch housing abuts against the bottom of the assembly area and is positioned through the assembly area, a part of the micro switch housing near one side of the armature assembly is suspended, and the space below the suspended micro switch housing makes way for the movement of the armature assembly and / or the push card, and when the cover body is fixedly connected to the base, the cover body presses the micro switch housing;

[0008] A pressing rod is extended from one end of the armature assembly toward one side of the cover body. When the armature assembly rotates, the pressing rod presses the micro switch touch spring or releases the micro switch touch spring.

[0009] As a further improvement, two positioning posts are provided at the bottom of the assembly area, and when the micro switch is installed in the assembly area, each positioning post is inserted into a mounting hole on the micro switch; the two positioning posts and the pressure rod are parallel to each other, so that the positioning and assembly of the micro switch are more convenient.

[0010] Furthermore, the positioning column includes a cylinder, and a plurality of positioning protrusions are provided on the outer peripheral surface of the cylinder at intervals along its radial direction; each of the positioning protrusions is in the shape of an elongated strip and is distributed along the axial direction of the cylinder.

[0011] As a further improvement, a limiting column for limiting the displacement of the micro switch housing is provided at the bottom of the assembly area beside one of the positioning columns, so that the micro switch housing is prevented from flipping and shifting by limiting the positioning of the limiting column.

[0012] As a further improvement, the distance between the bottom surface of the micro switch housing and the bottom surface of the base is greater than the distance between the upper surface of the end of the push card connected to the armature assembly and the bottom surface of the base, so that the displacement of one end of the push card does not interfere with the micro switch. This facilitates the arrangement of the micro switch and the push card, making the structure more compact.

[0013] As a further improvement, the bottom of the assembly area is formed by the upper end surface of a protrusion on the base, and the protrusion is stepped on the side close to the armature assembly, so as to better make way for the rotation of the armature assembly and the movement of the push card.

[0014] As a further improvement, a limiting rib is provided on the inner side surface of the cover body, and when the cover body is fixedly connected to the base, the limiting rib presses the micro switch housing.

[0015] As a further improvement, the multiple conductive plug terminals of the micro switch are bent and then pass through the cover or the bottom of the base, so as to facilitate the installation of the relay and the connection of the conductive plug terminals of the micro switch.

[0016] Furthermore, when the multiple conductive plug terminals of the micro switch are bent and then pass through the bottom of the base, a terminal extension is fixedly connected to the conductive plug terminal, and the terminal extension includes an I-shaped frame, the two ends of the I-shaped frame are insulators, and the two ends of the I-shaped frame are spaced through multiple conductive extension pins, and the multiple conductive plug terminals of the micro switch are inserted into one end of the I-shaped frame at intervals, and each conductive plug terminal of the micro switch is in contact with a conductive extension pin; the base is provided with a through hole at the bottom of the assembly area, and the through hole passes through the bottom of the base, the I-shaped frame is embedded in the through hole, and one end of the multiple conductive extension pins passes through the base. The terminal extension not only extends the length of the conductive plug terminal, but also ensures the strength of the conductive plug terminal and the reliability of the plug-in.

[0017] Preferably, the contact system includes two moving springs and two static springs, each moving spring is provided with the moving contact, each static spring is provided with the static contact, there are two push cards, one end of each push card is provided with a card slot, the push card below the card slot is provided with a matching hole, both ends of the armature assembly are provided with a clamping part, each clamping part is matched with the card slot at one end of a push card and inserted into the matching hole, the other end of each push card is connected to one end of a moving spring, and the other end of the moving spring is connected to the conductive lead pin. In this way, the armature assembly can drive the two groups of moving and static contacts of the contact system to be combined or separated through the two push cards.

[0018] As a further improvement, one end of the armature assembly first extends a support portion away from the micro switch, and the pressure rod is arranged on the end of the support portion away from the micro switch. This can better make room for the micro switch, so that the overall structure is more compact.

[0019] In the present invention, the base is provided with an assembly area for accommodating a micro switch near one end of the armature assembly, the micro switch housing abuts against the bottom of the assembly area and is positioned through the assembly area, the micro switch housing is partially suspended on one side near the armature assembly, and the suspended space below the micro switch housing makes way for the movement of the armature assembly and / or the push card, and when the cover body is fixedly connected to the base, the cover body presses the micro switch housing; a pressure rod extends from one end of the armature assembly to one side of the cover body, and when the armature assembly rotates, the pressure rod presses the micro switch touch spring or releases the micro switch touch spring. In this way, on the one hand, the micro switch can be arranged closer to the armature assembly, and the remaining space on the base is fully utilized, so that the overall structure of the relay is compact, and the volume of the magnetic latching relay after the micro switch is added is small; on the other hand, the micro switch housing abuts against the bottom of the assembly area and is positioned through the assembly area, and then the cover body presses the micro switch housing; in this way, it is convenient for the manipulator to grab the micro switch and the cover body for assembly, which is conducive to the realization of automatic assembly of the micro switch and reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a top perspective view of a first embodiment of the present invention;

[0021] Figure 2 It is a three-dimensional exploded view of the first embodiment of the present invention;

[0022] Figure 3 yes Figure 2 A magnified image of point A;

[0023] Figure 4 It is a bottom-up stereogram of a first embodiment of the present invention, in which a base, a micro switch and a static reed are hidden;

[0024] Figure 5 is a three-dimensional diagram of a base according to a first embodiment of the present invention;

[0025] Figure 6 yes Figure 5 The enlarged view of point B;

[0026] Figure 7 is a three-dimensional diagram of an armature assembly according to a first embodiment of the present invention;

[0027] Figure 8 This is a stereogram of a micro switch according to a first embodiment of the present invention;

[0028] Fig. 9 It is a top perspective view of the hidden cover and magnetic circuit system of the first embodiment of the present invention;

[0029] Fig.10 It is a three-dimensional diagram of a second embodiment of the present invention, in which a base, a cover and a static spring are hidden;

[0030] Fig.11 is a bottom perspective view of a hidden cover body according to a second embodiment of the present invention;

[0031] Fig.12 is a top perspective view of a base of a second embodiment of the present invention;

[0032] Fig.13 It is a stereoscopic diagram of the connection between the micro switch and the terminal extension piece according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Embodiment 1 Figures 1 to 9 As shown, a magnetic latching relay with a micro switch comprises an insulating housing 1 and a micro switch 2, wherein the insulating housing 1 is formed by a base 11 and a cover 12 being fixedly connected by clamping, the base 11 and the cover 12 being made of injection molding of plastic material, a magnetic circuit system 3, two push cards 4 and a contact system 5 are mounted on the base 11, the magnetic circuit system 3 comprises an armature assembly 31, a coil 32 and a yoke 33, the yoke 33 is fixedly connected to the coil frame, the coil 32 and the yoke 33 are fixed to one side of the base 11, the middle part of the armature assembly 31 is pivotally connected to the base 11 and is located next to the coil 32, a pivot shaft 311 is extended outwardly from the middle of the upper and lower ends of the armature assembly 31, the central axes of the two pivot shafts 311 overlap, one pivot shaft 311 is inserted into the pivot hole 111 of the base 11, and the other pivot shaft 311 cooperates with a sleeve hole 341 of a pressing block 34, and both ends of the pressing block 34 are fixedly connected to the base 11. The armature on the armature assembly 31 cooperates with the yoke 33 .

[0035] The contact system 5 comprises two moving reeds 51 and two stationary reeds 52. The two moving reeds 51 have the same structure and are both provided with two moving contacts 511. The two stationary reeds 52 have different structures. Figure 2 As shown, each static spring piece 52 is provided with two static contacts 521; there are two push cards 4, one end of each push card 4 is provided with a card slot 41, and the push card 4 below the card slot 41 is provided with a matching hole 42, and both ends of the armature assembly 31 are provided with a clamping portion 312, the clamping portion 312 is generally a cylinder, each clamping portion 312 is matched with the card slot 41 at one end of a push card 4 and inserted into the matching hole 42, and the other end of each push card 4 is connected to one end of a moving spring piece 51, and the other end of the moving spring piece 51 is connected to the conductive lead-out pin 512; the conductive lead-out pin 512 connected to the other end of each moving spring piece 51 has a different structure, and the details are shown in the attached Figure 2 .

[0036] It can be seen from the above structure that the contact system 5 is provided with two groups of corresponding moving contacts 511 and static contacts 521, and the two ends of the armature assembly 31 are respectively connected to a push card 4 through a clamping portion 312, and the two push cards 4 simultaneously drive the two groups of moving contacts 511 and static contacts 521 on the contact system 5 to engage with or separate from each other, thereby connecting and disconnecting the circuit.

[0037] The base 11 is provided with an assembly area 112 for accommodating the micro switch 2 at one end near the armature assembly 31. The shell of the micro switch 2 abuts against the bottom of the assembly area 112 and is positioned through the assembly area 112. Two positioning columns 1a are provided at the bottom of the assembly area 112. When the micro switch 2 is installed in the assembly area 112, each positioning column 1a is inserted into a mounting hole 21 on the micro switch 2. Each positioning column 1a includes a cylinder, and a plurality of positioning protrusions 11a are provided at intervals along the radial direction on the outer peripheral surface of the cylinder. Each positioning protrusion 11a is in the shape of a long strip and distributed along the axial direction of the cylinder. This makes it easier for the positioning column 1a to be inserted into the mounting hole 21 on the micro switch 2 and ensures the matching accuracy. A limiting column 1b for limiting the displacement of the shell of the micro switch 2 is provided next to one of the positioning columns 1a at the bottom of the assembly area 112. The limiting column 1b can prevent the micro switch 2 from tilting, flipping and shifting.

[0038] When the cover 12 is fixedly connected to the base 11 , the cover 12 presses the housing of the micro switch 2 ; specifically, a limiting rib 121 is provided on the inner side of the cover 12 , and when the cover 12 is fixedly connected to the base 11 , the limiting rib 121 presses the housing of the micro switch 2 .

[0039] The trigger spring 22 of the micro switch 2 is arranged close to the armature assembly 31, and a pressure rod 313 extends from one end of the armature assembly 31 toward the side of the cover body 12, and the pressure rod 313 is parallel to the two positioning columns 1a; when the armature assembly 31 rotates, the pressure rod 313 presses the trigger spring 22 of the micro switch 2 or releases the trigger spring 22 of the micro switch 2.

[0040] The three conductive plug terminals 23 of the micro switch 2 are bent 90° and then pass through the cover 12 .

[0041] Further integration Figure 2 , Figure 7 , Fig. 9 As shown, the side of the micro switch 2 housing near the armature assembly 31 is partially suspended, and the space below the suspended micro switch 2 housing makes room for the armature assembly 31 and the push card 4 to move. The distance between the bottom surface of the micro switch 2 housing and the bottom surface of the base 11 is greater than the distance between the upper surface of the end of the push card 4 connected to the armature assembly 31 and the bottom surface of the base 11, so that the displacement of one end of the push card 4 does not interfere with the micro switch 2; the bottom of the assembly area 112 is formed by the upper end surface of a protrusion 113 on the base 11, and the side of the protrusion 113 near the armature assembly 31 is stepped. In this way, the armature assembly 31 and the push card 4 can be better moved to make room, making the overall structure more compact.

[0042] One end of the armature assembly 31 first extends a support portion 314 away from the micro switch 2, and the pressure rod 313 is arranged on the end of the support portion 314 away from the micro switch 2. In this way, the micro switch 2 can be arranged closer to the armature assembly 31, making the structure more compact.

[0043] When the armature assembly 31 of the present embodiment rotates counterclockwise, the two groups of moving contacts 511 and the static contacts 521 on the contact system 5 are separated from each other; the pressure rod 313 presses the microswitch 2 to touch the reed 22 so that the microswitch 2 is actuated, and the microswitch 2 transmits one state to the outside through the conductive plug terminal 23; when the armature assembly 31 of the present embodiment rotates clockwise, the two groups of moving contacts 511 and the static contacts 521 on the contact system 5 are engaged with each other, the pressure rod 313 releases the microswitch 2 to touch the reed 22, the microswitch 2 is reset and does not actuate, and the microswitch 2 also transmits another state to the outside through the conductive plug terminal 23; in this way, the working state of the contactor can be conveniently judged by judging the state of the microswitch.

[0044] Embodiment 2 Figures 10 to 13As shown, a magnetic latching relay with a micro switch is different from the first embodiment in that: two conductive plug terminals 23 are arranged on the micro switch 2, and the two conductive plug terminals 23 of the micro switch 2 are bent 90 degrees and then pass through the bottom of the base 11. In order to use the existing micro switch and reduce the cost, the two conductive plug terminals 23 of the micro switch 2 can pass through the bottom of the base 11, and a terminal extension 6 is fixedly connected to the two conductive plug terminals 23. The terminal extension 6 includes an I-shaped frame 61, and the two ends of the I-shaped frame 61 are insulators. Two conductive extension pins 62 are inserted at intervals at the two ends of the I-shaped frame 61. The two conductive plug terminals 23 of the micro switch 2 are inserted at intervals on one end of the I-shaped frame 61, and each conductive plug terminal 23 of the micro switch 2 is in contact with a conductive extension pin 62;

[0045] The base 11 has a through hole 1c at the bottom of the assembly area 112 . The through hole 1c runs through the bottom of the base 11 . The I-shaped frame 61 is embedded in the through hole 1c . One end of the two conductive extension pins 62 passes through the base 11 .

[0046] The above are only two preferred embodiments of the present invention. Any equivalent changes made by those skilled in the art according to the claims shall fall within the protection scope of this case.

Claims

1. A magnetic latching relay with a micro switch, comprising an insulating housing and a micro switch, wherein the insulating housing is formed by a base and a cover body being fixedly connected, a magnetic circuit system, a push card and a contact system are mounted on the base, the magnetic circuit system comprises an armature assembly, the middle part of the armature assembly is pivotally connected to the base, the contact system comprises a moving contact and a stationary contact, the armature assembly is connected to the push card and drives the moving contact of the contact system through the push card so that the moving contact is engaged or separated from the stationary contact, and the characteristics are: The base is provided with an assembly area for accommodating the micro switch at one end near the armature assembly, the micro switch housing abuts against the bottom of the assembly area and is positioned through the assembly area, a part of the micro switch housing near the armature assembly is suspended, and the space below the suspended micro switch housing makes way for the movement of the armature assembly and / or the push card, and when the cover body is fixedly connected to the base, the cover body presses the micro switch housing; A pressing rod is extended from one end of the armature assembly toward one side of the cover body. When the armature assembly rotates, the pressing rod presses the micro switch touch spring or releases the micro switch touch spring.

2. A magnetic latching relay with a micro switch according to claim 1, characterized in that: Two positioning columns are arranged at the bottom of the assembly area. When the micro switch is installed in the assembly area, each positioning column is inserted into a mounting hole on the micro switch. The two positioning columns are parallel to the pressure rod.

3. A magnetic latching relay with a micro switch according to claim 2, characterized in that: The positioning column comprises a cylinder, and a plurality of positioning protrusions are arranged at intervals along the radial direction on the outer peripheral surface of the cylinder; each of the positioning protrusions is in the shape of an elongated strip and is distributed along the axial direction of the cylinder.

4. A magnetic latching relay with a micro switch according to claim 2, characterized in that: A limiting column for limiting the displacement of the micro switch housing is arranged beside one of the positioning columns at the bottom of the assembly area.

5. The magnetic latching relay with a micro switch according to claim 1, characterized in that: The distance between the bottom surface of the micro switch housing and the bottom surface of the base is greater than the distance between the upper surface of one end of the push card connected to the armature assembly and the bottom surface of the base, so that the displacement of one end of the push card does not interfere with the micro switch.

6. The magnetic latching relay with a micro switch according to claim 1, characterized in that: The bottom of the assembly area is formed by the upper end surface of a protrusion on the base, and the side of the protrusion close to the armature assembly is stepped.

7. The magnetic latching relay with a micro switch according to claim 1, characterized in that: The inner side surface of the cover body is provided with a limiting rib, and when the cover body is fixedly connected to the base, the limiting rib presses the micro switch housing.

8. The magnetic latching relay with a micro switch according to claim 1, characterized in that: The plurality of conductive plug terminals of the micro switch are bent and then pass through the cover body or the bottom of the base.

9. A magnetic latching relay with a micro switch according to claim 8, characterized in that: When the multiple conductive plug terminals of the micro switch are bent and then pass through the bottom of the base, a terminal extension piece is fixedly connected to the conductive plug terminal, and the terminal extension piece includes an I-shaped frame, both ends of the I-shaped frame are insulators, and multiple conductive extension pins are inserted through the two ends of the I-shaped frame at intervals. The multiple conductive plug terminals of the micro switch are inserted into one end of the I-shaped frame at intervals, and each conductive plug terminal of the micro switch is in contact with a conductive extension pin; The base is provided with a through hole at the bottom of the assembly area, the through hole runs through the bottom of the base, the I-shaped frame is embedded in the through hole, and one end of the plurality of conductive extension pins passes through the base.

10. The magnetic latching relay with a micro switch according to claim 1, characterized in that: The contact system includes two moving springs and two static springs, each moving spring is provided with the moving contact, each static spring is provided with the static contact, there are two push cards, one end of each push card is provided with a card slot, the push card below the card slot is provided with a matching hole, both ends of the armature assembly are provided with a clamping part, each clamping part cooperates with the card slot at one end of a push card and is inserted into the matching hole, the other end of each push card is connected to one end of a moving spring, and the other end of the moving spring is connected to a conductive lead-out pin.

11. A magnetic latching relay with a micro switch according to any one of claims 1 to 10, characterized in that: One end of the armature assembly first extends a support portion toward a side away from the micro switch, and the pressure rod is arranged on an end of the support portion away from the micro switch.

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