Small magnetic latching relay with large opening distance

Abstract

The utility model discloses a small magnetic latching relay with a large opening distance. The small magnetic latching relay comprises a base, a coil assembly, a magnetic steel assembly, a driving assembly, a movable spring device and a static spring device, the base comprises a base body and a first rotating shaft hole. The magnetic steel assembly comprises a permanent magnet, a swing arm and a limiting baffle, and the driving assembly comprises a shifting rod and a connecting rod. And the deflector rod is provided with an insertion hole. The movable spring device comprises a frame and a movable contact assembly. The frame is provided with a clamping groove. The magnetic steel assembly is connected with the movable spring device through the driving assembly arranged between the magnetic steel assembly and the movable spring device. And the driving lever rotates by taking the rotating shaft as a central shaft. The jack is arranged close to one end of the connecting rod, so that the swing distance of the driving lever is enlarged, the open distance between the movable spring device and the static spring device is increased, and good open circuit keeping performance is achieved. And meanwhile, the movable contact and the static contact can be in direct face-to-face contact, so that the circuit stability is relatively high.

Description

TECHNICAL FIELD

[0001] The utility model relates to relay technology field, especially a small -size magnetic latching relay with big opening distance. BACKGROUND

[0002] In the prior art magnetic latching relay, the following defects exist. The opening distance is too small. The opening distance between the movable and static contacts of the relay is about 1mm when it is opened. There are many products with an opening distance of 0.8mm. For switches used in terminal power distribution main circuit control, the national standard has mandatory requirements for contact opening distance and dielectric performance. The existing magnetic latching relay cannot fully meet these requirements due to the small opening distance, poor dielectric performance, and lack of isolation function. In particular, when the electrical life test is completed or other tests are performed, and the contacts are contaminated, the dielectric performance will be further reduced. Due to the limitations of contact opening distance and dielectric performance, the application range of the relay is limited. Moreover, it is difficult to further increase the opening distance due to the existing relay structure. Furthermore, the existing relay structure is complex and has high processing difficulty, which can easily result in poor consistency of the product during production, thereby causing unstable product performance.

[0003] A large-contact-opening-distance magnetic latching relay is disclosed in CN201520145172.8, which includes a rotating mechanism (1), a static magnetic conductor (2), a movable contact assembly (3), a static contact assembly (4), and a coil (5). The rotating mechanism (1) and the coil (5) are arranged side by side. The rotating mechanism (1) is rotated by the magnetic field formed by the current of the coil (5). The magnetic latching relay further includes a flexible conductor (6) connected to the movable contact assembly (3). The movable contact assembly (3) is directly fixed to the rotating mechanism (1) and forms an integral body with the rotating mechanism (1). The movable contact assembly is hard-connected to the rotating mechanism to increase the distance between the contacts. However, the contacts cannot be completely contacted due to the contact angle, which can cause uneven wear of the contacts and reduce the service life. SUMMARY

[0004] Therefore, the utility model provides a small -size magnetic latching relay with big opening distance to solve the above technical problems.

[0005] The utility model provides a small-sized magnetic latching relay with large opening distance, which comprises a base, a coil assembly arranged in the base, a magnetic steel assembly arranged on one side of the coil assembly, a driving assembly arranged in the base and connected with the magnetic steel assembly, a moving spring device slidingly arranged in the base, a stationary spring device arranged in the base, and two arc extinguishing grooves arranged on both sides of the guide rail.

[0006] Further, the coil assembly comprises a coil framework placed in the base body and an electromagnetic coil wound around the coil framework.

[0007] Further, one side of the limiting baffle towards the moving spring device is provided with a sliding groove.

[0008] Further, the limiting baffle is provided with a second rotating shaft hole corresponding to the first rotating shaft hole.

[0009] Further, the insertion hole is arranged near one end of the connecting rod.

[0010] Further, the frame is provided with a sliding rail on each side end face.

[0011] Further, each moving contact assembly comprises a connecting plate fixedly arranged on the frame and two moving contacts arranged on both ends of the connecting plate.

[0012] Further, the stationary spring device comprises two stationary spring sheets inserted into the base body at one end and at least two stationary contacts arranged on the two stationary spring sheets respectively.

[0013] Further, the number of stationary contacts is the same as that of moving contacts, and the positions of the stationary contacts correspond to those of the moving contacts.

[0014] Further, the width of the two sets of arc extinguishing grids is greater than the maximum interval distance between the moving contacts and the stationary contacts.

[0015] Compared with the prior art, the small-sized magnetic latching relay with large opening distance provided by the utility model connects a driving assembly between the magnetic steel assembly and the moving spring device. The driving assembly comprises a lever rotatingly arranged in the first rotating shaft hole, and a connecting rod with two ends connected with the lever and the swing arm respectively. The middle region of the lever is provided with a socket. A rotating shaft passes through the socket and is inserted into the first rotating shaft hole, so that the lever rotates around the rotating shaft as the central axis. The socket is arranged close to one end of the connecting rod, enlarging the swing distance of the end of the lever connected with the frame, thereby increasing the opening distance between the moving spring device and the static spring device in limited space, and the relay has good breaking and holding performance. Meanwhile, the moving contact and the static contact can directly contact with each other, and the relay has high passage stability. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a structure schematic view of small-sized magnetic latching relay with large opening distance.

[0017] Figure 2 The utility model provides a structure schematic view of small-sized magnetic latching relay with large opening distance. Figure 1

[0018] The utility model provides a structure schematic view of small-sized magnetic latching relay with large opening distance. Figure 3 Figure 1 The utility model provides a structure schematic view of small-sized magnetic latching relay with large opening distance.

[0019] Figure 4 The utility model provides a structure schematic view of small-sized magnetic latching relay with large opening distance. Figure 1

[0020] The utility model provides a structure schematic view of small-sized magnetic latching relay with large opening distance. Figure 5 Figure 1 The utility model provides a structure schematic view of small-sized magnetic latching relay with large opening distance. DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model are further explained below. It should be understood that the explanation of the embodiments of the utility model herein is not used to limit the protection scope of the utility model.

[0022] As Figures 1 to 5 ​​As shown, it is a kind of small magnetic latching relay with large opening distance structure schematic diagram provided by the utility model. The small magnetic latching relay with large opening distance includes a base 10, a coil assembly 20 arranged in the base 10, a magnetic steel assembly 30 arranged in one side of the coil assembly 20, a driving assembly 40 arranged in the base 10 and connected with the magnetic steel assembly 30, a moving spring device 50 slidingly arranged in the base 10, a static spring device 60 arranged in the base 10, and two groups of arc extinguishing grids 70 arranged in two sides of the moving spring device 50 and the static spring device 60. It can be conceived that the small magnetic latching relay with large opening distance also includes other functional structures, such as connecting terminals, gaskets and the like, which are known to those skilled in the art, and will not be described here.

[0023] The base 10 includes a base body 11, a first rotating shaft hole 12 arranged in the base body 11, a guide rail 13 arranged between the first rotating shaft hole 12 and the coil assembly 20, and two arc extinguishing grooves 14 arranged in two sides of the guide rail 13.

[0024] The base body 11 is used for mounting various parts to be combined into a relay. The arc extinguishing groove 14 is used for mounting the arc extinguishing grid 70.

[0025] The first rotating shaft hole 12 is used for mounting the driving assembly 40, and the guide rail 13 is used for cooperating with the moving spring device 50.

[0026] The coil assembly 20 includes a coil skeleton 21 placed in the base body 11, and an electromagnetic coil 22 wound on the coil skeleton 21. The electromagnetic coil 22 generates N pole and S pole at its two ends after being energized, thereby driving the magnetic steel assembly 30 to rotate.

[0027] The magnetic steel assembly 30 includes a permanent magnet 31 rotatably arranged in one side of the coil assembly 20, a swing arm 32 arranged on the end face of the permanent magnet 31 away from the coil assembly 20, and a limiting baffle 33 inserted into the base 10.

[0028] The permanent magnet 31 has N and S poles, which interact with the N and S poles of the coil assembly 20 after being energized, so that the permanent magnet 31 rotates. The swing arm 32 rotates with the permanent magnet 31, thereby driving the driving assembly 40 connected thereto to move. The limiting baffle 33 fixes the permanent magnet 31, and one side of the limiting baffle 33 facing the moving spring device 50 is provided with a sliding groove 34 for cooperating with the moving spring device 50. The limiting baffle 33 is provided with a second rotating shaft hole 35 corresponding to the position of the first rotating shaft hole 12, so as to fix the relative position of the driving assembly 40.

[0029] The driving assembly 40 comprises a rotating lever 41 arranged in the first rotating shaft hole 12, and a connecting rod 42 connected to the rotating lever 41 and the swing arm 32 at two ends.

[0030] The middle region of the rotating lever 41 is provided with a insertion hole 43. A rotating shaft 44 passes through the insertion hole 43 and is inserted into the first rotating shaft hole 12, and the other end of the rotating shaft 44 is inserted into the second rotating shaft hole 35, so as to limit the axial and radial displacement of the rotating lever 41. The rotating lever 41 rotates around the rotating shaft 44 as the center axis, one end of the rotating lever 41 is inserted into the moving spring device 50, and the other end is connected to the rotating lever 41. One end of the connecting rod 42 is inserted and fixed to the free end of the swing arm 32, so that the connecting rod 42 is driven to move by the rotation of the permanent magnet 31, thereby driving the rotating lever 41 to move. The position of the insertion hole 43 on the rotating lever 41 can be designed according to actual needs, so as to change the swing angle of the end of the rotating lever 41 connected to the moving spring device 50, thereby adjusting the interval distance between the moving spring device 50 and the static spring device 60. In this embodiment, the insertion hole 43 is arranged near one end of the connecting rod 42, so as to enlarge the swing angle of the end of the rotating lever 41 connected to the frame 51.

[0031] The moving spring device 50 comprises a frame 51 slidingly arranged in the guide rail 13, and at least one set of moving contact assembly 52 arranged on the end face of the frame 51 away from the magnet steel assembly 30.

[0032] The two side end faces of the frame 51 are respectively provided with a slide rail 53. The two slide rails 53 are slidingly arranged in the guide rail 13 and the sliding groove 34, thereby guiding and limiting the reciprocating sliding of the frame 51. One side of the frame 51 close to the rotating lever 41 is provided with a clamping groove 54, and one end of the rotating lever 41 is clamped in the clamping groove 54, so as to be able to push the frame 51 to reciprocatingly slide along the guide rail 13 and the sliding groove 34.

[0033] The moving contact assembly 52 is connected to the frame 51 by a snap-in manner. Each moving contact assembly 52 comprises a connecting plate 521 fixedly arranged on the frame 51, and two moving contacts 522 arranged on both ends of the connecting plate 521.

[0034] The connecting plate 521 is made of a conductive material, and the moving contacts 522 arranged on both ends of the connecting plate 521 are connected in series to form a path. The length of the connecting plate 521 corresponds to the arrangement of the static spring device 60, so that the moving contacts 522 fixedly arranged on both ends of the connecting plate 521 can be correctly abutted with the static spring device 60.

[0035] The static spring device 60 comprises two static spring sheets 61 inserted at one end into the base body 11, and at least two static contacts 62 arranged on the two static spring sheets 61 respectively. The number of the static contacts 62 is the same as that of the moving contacts 522, and the positions are corresponding.

[0036] Two groups of the arc extinguishing grids 70 are fixedly arranged in the two arc extinguishing grooves 14 respectively, and the arc extinguishing grids 70 are composed of a plurality of magnetic metal sheets. The width of the two groups of the arc extinguishing grids 70 is greater than the maximum interval distance between the moving contacts 522 and the static contacts 62, so that the magnetic field of the arc extinguishing grids 70 can eliminate the arc between the moving contacts 522 and the static contacts 62.

[0037] In use, the coil assembly 20 is energized to drive the permanent magnet 31 to swing and pull the connecting rod 42, so that the connecting rod 42 pulls one end of the lever 41, and the lever 41 rotates around the rotating shaft 44 as the center axis, and then pushes the frame 51 to reciprocate, so as to achieve the purpose of connecting or disconnecting the moving contacts 522 and the static contacts 62.

[0038] Compared with the prior art, the small magnetic latching relay with large opening distance provided by the utility model connects a driving assembly 40 between the magnetic steel assembly 30 and the moving spring device 50. The driving assembly 40 comprises a lever 41 rotatably arranged in the first rotating shaft hole 12 and a connecting rod 42 connected with the lever 41 and the swing arm 32 at two ends. The middle region of the lever 41 is provided with a socket 43. A rotating shaft 44 passes through the socket 43 and is inserted into the first rotating shaft hole 12, so that the lever 41 rotates along the rotating shaft 44 as the central axis. The socket 43 is arranged close to one end of the connecting rod 42, enlarges the swing distance of the end of the lever 41 connected with the frame 51, thereby increasing the opening distance between the moving spring device 50 and the static spring device 60 in limited space, and the magnetic latching relay has good breaking and holding performance. Meanwhile, the moving contact 522 and the static contact 62 can directly contact face to face, so that the magnetic latching relay has high passage stability.

[0039] The above is only the preferred embodiment of the utility model, and is not used for limiting the protection scope of the utility model, and any modification, equivalent replacement or improvement in the spirit of the utility model is covered in the claim scope of the utility model.

Claims

1. A miniature magnetic latching relay with a large opening gap, characterized in that: The miniature magnetic latching relay with a large opening distance includes a base, a coil assembly disposed in the base, a magnet assembly disposed on one side of the coil assembly, a drive assembly disposed in the base and connected to the magnet assembly, a moving spring device slidably disposed in the base, a stationary spring device disposed in the base, and two arc-extinguishing grooves disposed on both sides of the guide rail. The base includes a base body and a first rotating shaft hole disposed in the base body. The magnet assembly includes a permanent magnet rotatably disposed on one side of the coil assembly and a drive assembly disposed on the side of the permanent magnet facing away from the coil assembly. The coil assembly includes a swing arm on its end face and a limiting baffle inserted into the base. The drive assembly includes a lever rotatably disposed in the base and a connecting rod with its two ends connected to the lever and the swing arm respectively. The lever has a socket in its middle region, and a rotating shaft passes through the socket and is inserted into a first rotating shaft hole. The moving spring device includes a frame slidably disposed in the base and at least one set of moving contact assemblies disposed on the frame facing away from the magnet assembly end face. The frame has a slot on the side near the lever, and one end of the lever is engaged in the slot.

2. The miniature magnetic latching relay with a large opening distance as described in claim 1, characterized in that: The coil assembly includes a coil frame placed in the base body and an electromagnetic coil wound on the coil frame.

3. The miniature magnetic latching relay with a large opening distance as described in claim 1, characterized in that: The limiting baffle has a sliding groove on the side facing the moving spring device.

4. The miniature magnetic latching relay with a large opening distance as described in claim 1, characterized in that: A second pivot hole is provided on the limiting baffle at the position corresponding to the first pivot hole.

5. The miniature magnetic latching relay with a large opening distance as described in claim 1, characterized in that: The insertion hole is located near one end of the connecting rod.

6. The miniature magnetic latching relay with a large opening distance as described in claim 1, characterized in that: A slide rail is provided on each of the two end faces of the frame.

7. The miniature magnetic latching relay with a large opening distance as described in claim 1, characterized in that: Each of the moving contact assemblies includes a connecting plate fixedly mounted on the frame, and two moving contacts disposed at both ends of the connecting plate.

8. The miniature magnetic latching relay with a large opening distance as described in claim 1, characterized in that: The stationary spring device includes two stationary springs with one end inserted into the base body, and at least two stationary contacts respectively disposed on the two stationary springs.

9. The miniature magnetic latching relay with a large opening distance as described in claim 8, characterized in that: The number of stationary contacts and the number of moving contacts are the same, and their positions correspond to each other.

10. The miniature magnetic latching relay with a large opening distance as described in claim 1, characterized in that: The width of the two sets of arc-extinguishing grids is greater than the maximum interval between the moving contact and the stationary contact.

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