A magnetic latching relay with auxiliary contacts

Abstract

The present invention discloses a magnetic latching relay with auxiliary contacts, comprising an auxiliary contact part, a push card and a base; one side of the push card is provided with a second card slot with a lateral opening; the auxiliary contact part comprises an auxiliary moving spring and an auxiliary moving contact; the auxiliary moving contact is fixed on the auxiliary moving spring and the position where the auxiliary moving spring fixes the auxiliary moving contact can swing relative to the root of the auxiliary moving spring; at the position where the auxiliary moving spring fixes the auxiliary moving contact, an auxiliary moving spring extension piece is also extended in the direction of the second card slot on one side of the push card, and the end of the auxiliary moving spring extension piece is adapted in the second card slot, so that the push card can drive the auxiliary moving contact to move when it moves back and forth to realize the closing or separation of the auxiliary contact. The present invention can improve the indication state reliability, enhance the assembly reliability and enhance the mechanical durability of the auxiliary moving spring, thereby effectively ensuring the electrical service life of the magnetic latching relay.

Description

Technical Field

[0001] The invention relates to the technical field of relays, in particular to a magnetic latching relay with auxiliary contacts. 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. The open and closed states of the contacts of the magnetic latching relay are usually maintained by the magnetic force generated by the permanent magnet. When the contacts of the relay need to be opened or closed, it is only necessary to excite the coil with a positive (negative) DC pulse voltage, and the relay will complete the open and closed state conversion in an instant. Usually, when the contacts are in the holding state, the coil does not need to continue to be energized, and the magnetic force of the permanent magnet alone can maintain the state of the relay unchanged.

[0003] With the continuous expansion of the application field of relays, a magnetic latching relay with an auxiliary contact structure in the prior art is provided. The auxiliary contact is mainly used to feedback the contact status of the main contact of the product. A magnetic latching relay with an auxiliary contact in the prior art is configured to push the auxiliary contact through the armature part. This magnetic latching relay with auxiliary contacts has the following main disadvantages: first, the main contact is pushed by a push card, and the auxiliary contact is pushed by the armature part. When the armature part fails to cooperate with the push card, the indication state may be unreliable; second, the assembly reliability is not high, and foreign matter is easily generated during the product assembly process; third, the auxiliary moving spring is pushed by the armature part, which makes the auxiliary moving spring deformed, stressed, and easy to break and fail. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a magnetic latching relay with auxiliary contacts. Through structural improvement, the reliability of the indication state, the assembly reliability and the mechanical durability of the auxiliary moving spring can be improved, thereby effectively ensuring the electrical service life of the magnetic latching relay.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a magnetic latching relay with auxiliary contacts, comprising an auxiliary contact part, a push card and a base; the auxiliary contact part and the push card are respectively assembled in the base; the two ends of the push card are respectively provided with first card slots that can be inserted from the upper and lower directions, so as to respectively cooperate with the active spring of the relay and the armature part of the relay; one side of the push card is provided with a second card slot with a lateral opening; the auxiliary contact part comprises an auxiliary moving spring and an auxiliary moving contact; the auxiliary moving contact is fixed on the auxiliary moving spring and the position where the auxiliary moving spring fixes the auxiliary moving contact can swing relative to the root of the auxiliary moving spring; at the position where the auxiliary moving spring fixes the auxiliary moving contact, an auxiliary moving spring extension piece is also extended in the direction of the second card slot on one side of the push card, and the end of the auxiliary moving spring extension piece is adapted in the second card slot, so that the push card can drive the auxiliary moving contact to move when it moves back and forth to achieve the closing or separation of the auxiliary contact.

[0006] The auxiliary dynamic spring piece and the auxiliary dynamic spring extension piece are an integrated structure, and the auxiliary dynamic spring piece and the auxiliary dynamic spring extension piece intersect at 90 degrees to form an L-shape.

[0007] The auxiliary contact part also includes an auxiliary dynamic spring lead-out piece, which is laterally inserted into the slot of the base; the auxiliary dynamic spring piece is vertically arranged, and the root of the auxiliary dynamic spring piece is fixed to the auxiliary dynamic spring lead-out piece at the upper position of the auxiliary dynamic contact.

[0008] The auxiliary dynamic spring lead-out piece is composed of a long strip bent into a Z shape; the slot of the base is an L-shaped side slot arranged on one side of the base; the part of the auxiliary dynamic spring lead-out piece corresponding to the L-shaped side slot is fixed in the L-shaped side slot of the base in an interference fit manner; the bottom section of the auxiliary dynamic spring lead-out piece exposes the L-shaped side slot downward to serve as a lead-out pin, and the top section of the auxiliary dynamic spring lead-out piece exposes the L-shaped side slot upward to serve as a fixing part of the auxiliary dynamic spring piece, and a sufficiently long distance is provided from the fixing part to the fixing point of the auxiliary dynamic contact.

[0009] The auxiliary contact part also includes an auxiliary static spring and an auxiliary static contact. The auxiliary static contact is fixed on the auxiliary static spring. The auxiliary static spring is laterally inserted into the corresponding slot of the base, so that the auxiliary static contact and the auxiliary moving contact are in a matching position. A positioning groove for making way is also provided in the corresponding slot of the base.

[0010] The second card slot is composed of two side plates extending outward from one side of the push card, and the end of the auxiliary dynamic spring extension piece is adapted between the two side plates in the thickness direction; there is a large gap between the two side plates relative to the thickness of the auxiliary dynamic spring extension piece.

[0011] The base is provided with a sinking groove, and the push card guide is matched in the sinking groove of the base and moves back and forth in the horizontal direction.

[0012] Guide columns are respectively arranged on both sides of the push card, and guide grooves are respectively arranged on the side walls of the sink groove of the base, and the guide columns on both sides of the push card are respectively adapted in the guide grooves of the base.

[0013] A through opening is provided at the bottom of the groove of the base, and the through opening is communicated with the guide groove; a bottom cover plate is fixedly connected to the through opening, and a guide strip is provided in the bottom cover plate at a position corresponding to the guide column of the push card, and the guide column of the push card slides and presses on the corresponding guide strip.

[0014] The upper and lower surfaces and the outer side surface of the guide column of the push card are respectively set as arc shapes; the upper end surface of the guide strip is also set as an arc surface.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention adopts a second slot with a lateral opening on one side of the push card; the auxiliary contact part includes an auxiliary moving spring and an auxiliary moving contact; the auxiliary moving contact is fixed on the auxiliary moving spring and the position where the auxiliary moving spring fixes the auxiliary moving contact can swing relative to the root of the auxiliary moving spring; at the position where the auxiliary moving spring fixes the auxiliary moving contact, an auxiliary moving spring extension piece is also extended in the direction of the second slot on one side of the push card, and the end of the auxiliary moving spring extension piece is adapted in the second slot, so that the push card can drive the auxiliary moving contact to move when it moves back and forth to achieve the closing or separation of the auxiliary contact. This structure of the present invention enables the auxiliary contact and the main contact to be driven by a unified part (i.e., the push card), avoiding the risk of failure of cooperation between different parts when different parts are driven, resulting in unreliable indication of the state; this structure can improve the reliability of the existing action feedback function.

[0017] 2. The present invention adopts an auxiliary spring lead-out piece which is formed by bending a long strip into a Z-shape; an L-shaped side slot is provided on one side of the base; the part of the auxiliary spring lead-out piece corresponding to the L-shaped side slot is fixed in the L-shaped side slot of the base in an interference fit manner; the bottom section of the auxiliary spring lead-out piece exposes the L-shaped side slot downward as a lead-out pin, and the top section of the auxiliary spring lead-out piece exposes the L-shaped side slot upward as a fixing part of the auxiliary spring piece, and a sufficiently long distance is provided between the fixing part and the fixing part of the auxiliary moving contact. This structure of the present invention utilizes the auxiliary spring lead-out piece to extend upward and then be assembled and connected with the auxiliary moving spring piece, providing space for the auxiliary moving spring piece to extend downward. The auxiliary moving spring piece utilizes the space and extends downward to a longer dimension. The auxiliary moving spring piece extends in dimension, dispersing the stress of the auxiliary moving spring piece, thereby improving the mechanical durability of the auxiliary contact part.

[0018] 3. The present invention adopts a second card slot formed by two side plates extending outward from one side of the push card, and the end of the auxiliary spring extension piece is adapted between the two side plates in the thickness direction; there is a large gap between the two side plates relative to the thickness of the auxiliary spring extension piece. In this structure of the present invention, during the insertion process, there is a gap between the auxiliary spring piece and the two side plates, which prevents the auxiliary spring part from being misaligned with the push component during the insertion process of the base, thereby ensuring the assembly reliability of the auxiliary contact part of the magnetic latching DC relay.

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the magnetic latching relay with auxiliary contacts of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention (rotated at one angle);

[0022] Figure 3 It is a partial structural schematic diagram of an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the cooperation between the auxiliary contact part, the push card and the contact part of an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the auxiliary contact part of an embodiment of the present invention cooperating with a push card;

[0025] Figure 6 is a schematic diagram of the cooperation between the base, the auxiliary contact part and the push card of an embodiment of the present invention;

[0026] Figure 7 is a cross-sectional view of the base and the push card in cooperation with each other according to an embodiment of the present invention;

[0027] Figure 8 It is a schematic diagram of a three-dimensional structure of a base and a push card in cooperation with each other according to an embodiment of the present invention (the bottom surface is turned upward);

[0028] Fig. 9 Schematic diagram of the structure of the bottom cover plate of an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Example

[0030] See also Figures 1 to 9 As shown, a magnetic latching relay with auxiliary contacts of the present invention comprises a magnetic circuit part 1, a contact part (i.e., main contact) 2, an auxiliary contact part 3, a push card 4 and a base 5, as well as a shell 7 and an armature part 8, wherein the shell 7 is provided with an arc-extinguishing magnetic steel 9; the contact part 2 comprises an active spring 21; the auxiliary contact part 3 and the push card 4 are respectively assembled in the base 5; the two ends of the push card 4 are respectively provided with first card slots 41 and 42 which can be inserted from the upper and lower directions, wherein the first card slot 41 is used to cooperate with the armature part 8 of the relay, and the first card slot 42 is used to cooperate with the active spring 21 of the relay; one side of the push card 4 is provided with a second card slot 41 with a lateral opening. two card slots 43; the auxiliary contact part 3 includes an auxiliary moving spring 31 and an auxiliary moving contact 32; the auxiliary moving contact 32 is fixed on the auxiliary moving spring 31 and the position of the fixed auxiliary moving contact 32 of the auxiliary moving spring 31 can swing relative to the root of the auxiliary moving spring 31; at the position of the fixed auxiliary moving contact 32 of the auxiliary moving spring 31, an auxiliary moving spring extension piece 33 is also extended in the direction of the second card slot 43 on one side of the push card, and the end of the auxiliary moving spring extension piece 33 is adapted in the second card slot 43, so that when the push card 4 moves back and forth, it can drive the auxiliary moving contact 32 to move to achieve the closing or separation of the auxiliary contact.

[0031] In this embodiment, the auxiliary dynamic spring piece 31 and the auxiliary dynamic spring extension piece 33 are an integrated structure, and the auxiliary dynamic spring piece 31 and the auxiliary dynamic spring extension piece 33 intersect at 90 degrees to form an L-shape.

[0032] In this embodiment, the auxiliary contact part 3 also includes an auxiliary dynamic spring lead-out piece 34, which is laterally inserted into the slot 51 of the base 5; the auxiliary dynamic spring piece 31 is vertically arranged, and the root of the auxiliary dynamic spring piece 31 is fixed to the auxiliary dynamic spring lead-out piece 34 at a position above the auxiliary dynamic contact 32.

[0033] In this embodiment, the auxiliary dynamic spring lead-out piece 34 is composed of a long strip bent into a Z-shape; the slot 51 of the base 5 is an L-shaped side slot arranged on one side of the base; the portion of the auxiliary dynamic spring lead-out piece 34 corresponding to the L-shaped side slot 51 is fixed in the L-shaped side slot 51 of the base 5 in an interference fit manner; the bottom section of the auxiliary dynamic spring lead-out piece 34 exposes the L-shaped side slot downward to serve as a lead-out pin 342, and the top section 341 of the auxiliary dynamic spring lead-out piece 34 exposes the L-shaped side slot upward to serve as a fixing portion of the auxiliary dynamic spring piece, and a sufficiently long distance is provided from the fixing portion to the fixing position of the auxiliary dynamic contact.

[0034] In this embodiment, the auxiliary contact part 3 also includes an auxiliary static spring piece 35 and an auxiliary static contact 36. The auxiliary static contact 36 is fixed on the auxiliary static spring piece 35. The auxiliary static spring piece 35 is laterally inserted into the corresponding slot 52 of the base, so that the auxiliary static contact 36 and the auxiliary moving contact 32 are in a matching position; a positioning groove 521 for making way is also provided in the corresponding slot 52 of the base 5.

[0035] In this embodiment, the second card slot 43 is composed of two side plates 44 extending outward from one side of the push card 4, and the end of the auxiliary dynamic spring extension piece 33 is adapted between the two side plates 44 in the thickness direction; there is a large gap between the two side plates 44 relative to the thickness of the auxiliary dynamic spring extension piece 33.

[0036] In this embodiment, the base 5 is provided with a sinking groove 53, and the push card 4 is guided and fitted in the sinking groove 53 of the base 5 and moves back and forth in the horizontal direction.

[0037] In this embodiment, guide columns 45 are respectively provided on both sides of the push card 4 , and guide grooves 54 are respectively provided on the side walls of the sink 53 of the base 5 . The guide columns 45 on both sides of the push card 4 are respectively adapted in the guide grooves 54 of the base 5 .

[0038] In this embodiment, a through opening 531 is provided at the bottom of the groove 53 of the base 5, and the through opening 531 is communicated with the guide groove 54; a bottom cover plate 6 is fixedly connected to the through opening 531, and a guide strip 61 is provided in the bottom cover plate 6 at a position corresponding to the guide column 45 of the push card 4, and the guide column 45 of the push card 4 slides and presses on the corresponding guide strip 61.

[0039] In this embodiment, the upper and lower surfaces and the outer side surface of the guide column 45 of the push card 4 are respectively configured as arc shapes; the upper end surface of the guide strip 61 is also configured as an arc surface.

[0040] A magnetic latching relay with auxiliary contacts of the present invention adopts a second slot 43 with a lateral opening on one side of a push card 4; the auxiliary contact part 3 includes an auxiliary moving spring 31 and an auxiliary moving contact 32; the auxiliary moving contact 32 is fixed on the auxiliary moving spring 31 and the position of the fixed auxiliary moving contact 32 of the auxiliary moving spring 31 can swing relative to the root of the auxiliary moving spring 31; at the position of the fixed auxiliary moving contact of the auxiliary moving spring 31, an auxiliary moving spring extension piece 33 is also extended in the direction of the second slot 43 on one side of the push card 4, and the end of the auxiliary moving spring extension piece 33 is adapted in the second slot 43, so that the push card 4 can drive the auxiliary moving contact 32 to move when it moves back and forth to achieve the closing or separation of the auxiliary contact. This structure of the present invention controls the movement of the auxiliary contacts of the relay by moving the push card 4, and at the same time drives the main contacts to move, thereby controlling the relay to switch on and off the load. The external monitoring circuit is connected through the auxiliary contact part to monitor the action of the push card; when the coil part inputs a pulse, the armature part moves and drives the push card to connect the main circuit, and the upper side plate of the push card drives the auxiliary moving reed to contact the auxiliary static reed, so that the auxiliary contact loop is connected, thereby inputting a feedback signal to the external circuit, indicating that the push card has been actuated and the relay is connected; when the coil part inputs a reverse pulse, the armature part moves in the reverse direction and drives the push card to disconnect the main circuit, and the upper side plate of the push card drives the auxiliary moving reed away from the auxiliary static reed, so that the auxiliary contact loop is disconnected, thereby inputting a feedback signal to the external circuit, indicating that the push card has been reset and the relay is disconnected. The present invention enables the auxiliary contacts and the main contacts to be driven by a unified part (i.e., the push card), avoiding the risk of failure of coordination between different parts when different parts are driven, resulting in unreliable indication of the state; the structure can improve the reliability of the existing action feedback function.

[0041] The present invention discloses a magnetic latching relay with auxiliary contacts, wherein the auxiliary spring lead-out piece 34 is formed by bending a long strip into a Z-shaped shape; an L-shaped side slot 51 is provided on one side of the base; the portion of the auxiliary spring lead-out piece 34 corresponding to the L-shaped side slot is fixed in the L-shaped side slot 51 of the base in an interference fit manner; the bottom section of the auxiliary spring lead-out piece 34 exposes the L-shaped side slot downward as a lead-out pin 342, and the top section 341 of the auxiliary spring lead-out piece 34 exposes the L-shaped side slot upward as a fixing portion of the auxiliary spring lead-out piece 31, and a sufficiently long distance is provided between the fixing portion and the fixing position of the auxiliary moving contact. This structure of the present invention utilizes the auxiliary spring lead-out piece to extend upward and then be assembled and connected with the auxiliary moving spring piece, providing space for the auxiliary moving spring piece to extend downward, and the auxiliary moving spring piece utilizes the space to extend downward to a longer dimension, and the auxiliary moving spring piece extends in dimension to disperse the stress of the auxiliary moving spring piece, thereby improving the mechanical durability of the auxiliary contact part.

[0042] The magnetic latching relay with auxiliary contacts of the present invention adopts a second card slot 43 formed by two side plates 44 extending outward from one side of the push card 4, and the end of the auxiliary spring extension piece 33 is adapted between the two side plates 44 in the thickness direction; there is a large gap between the two side plates 44 relative to the thickness of the auxiliary spring extension piece 33. In this structure of the present invention, during the insertion process, there is a gap between the auxiliary spring piece and the two side plates, which prevents the auxiliary spring part from being misaligned with the push component during the insertion process of the base, thereby ensuring the assembly reliability of the auxiliary contact part of the magnetic latching DC relay.

[0043] The magnetic latching relay with auxiliary contacts of the present invention sets the auxiliary contacts on the push card, and the gap between the main contacts can be designed to be larger than the gap of the auxiliary contacts. In this way, the extension piece 33 of the L-shaped auxiliary movable spring can, through the interval between the two side plates 44, ensure that the gap of the auxiliary contacts does not need to be as large as the gap of the main contacts, which has the effect of reducing the space occupied by the auxiliary contacts. In addition, the auxiliary movable contact is at the turning point of the L-shape, so the extension piece 33 moves during the action process, so that after the auxiliary contact is closed, the extension piece 33 can move in the closing direction beyond the travel, and the range of movement of the extension piece 33 can move a larger distance following the push card, so that the auxiliary contacts do not need to move too much.

[0044] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A magnetic latching relay with auxiliary contacts, comprising an auxiliary contact part, a push card and a base; the auxiliary contact part and the push card are respectively assembled in the base; both ends of the push card are respectively provided with first card slots which can be inserted from the upper and lower directions, so as to respectively cooperate with the active reed of the relay and the armature part of the relay; characterized in that: A second slot with a lateral opening is provided on one side of the push card; the auxiliary contact part includes an auxiliary movable spring and an auxiliary movable contact; the auxiliary movable contact is fixed on the auxiliary movable spring and the position where the auxiliary movable spring fixes the auxiliary movable contact can swing relative to the root of the auxiliary movable spring; at the position where the auxiliary movable spring fixes the auxiliary movable contact, an auxiliary movable spring extension piece is also extended in the direction of the second slot on one side of the push card, and the end of the auxiliary movable spring extension piece is adapted in the second slot, so that the push card can drive the auxiliary movable contact to move when it moves back and forth to achieve the closing or separation of the auxiliary contact.

2. The magnetic latching relay with auxiliary contacts according to claim 1, characterized in that: The auxiliary dynamic spring piece and the auxiliary dynamic spring extension piece are an integrated structure, and the auxiliary dynamic spring piece and the auxiliary dynamic spring extension piece intersect at 90 degrees to form an L-shape.

3. The magnetic latching relay with auxiliary contacts according to claim 2, characterized in that: The auxiliary contact part also includes an auxiliary dynamic spring lead-out piece, which is laterally inserted into the slot of the base; the auxiliary dynamic spring piece is vertically arranged, and the root of the auxiliary dynamic spring piece is fixed to the auxiliary dynamic spring lead-out piece at the upper position of the auxiliary dynamic contact.

4. The magnetic latching relay with auxiliary contacts according to claim 3, characterized in that: The auxiliary dynamic spring lead-out piece is composed of a long strip bent into a Z shape; the slot of the base is an L-shaped side slot arranged on one side of the base; the part of the auxiliary dynamic spring lead-out piece corresponding to the L-shaped side slot is fixed in the L-shaped side slot of the base in an interference fit manner; the bottom section of the auxiliary dynamic spring lead-out piece exposes the L-shaped side slot downward to serve as a lead-out pin, and the top section of the auxiliary dynamic spring lead-out piece exposes the L-shaped side slot upward to serve as a fixing part of the auxiliary dynamic spring piece, and a sufficiently long distance is provided from the fixing part to the fixing point of the auxiliary dynamic contact.

5. The magnetic latching relay with auxiliary contacts according to claim 4, characterized in that: The auxiliary contact part also includes an auxiliary static spring and an auxiliary static contact. The auxiliary static contact is fixed on the auxiliary static spring. The auxiliary static spring is laterally inserted into the corresponding slot of the base, so that the auxiliary static contact and the auxiliary moving contact are in a matching position. A positioning groove for making way is also provided in the corresponding slot of the base.

6. The magnetic latching relay with auxiliary contacts according to claim 1, characterized in that: The second card slot is composed of two side plates extending outward from one side of the push card, and the end of the auxiliary dynamic spring extension piece is adapted between the two side plates in the thickness direction; there is a large gap between the two side plates relative to the thickness of the auxiliary dynamic spring extension piece.

7. The magnetic latching relay with auxiliary contacts according to claim 1, characterized in that: The base is provided with a sinking groove, and the push card guide is matched in the sinking groove of the base and moves back and forth in the horizontal direction.

8. The magnetic latching relay with auxiliary contacts according to claim 7, characterized in that: Guide columns are respectively arranged on both sides of the push card, and guide grooves are respectively arranged on the side walls of the sink groove of the base, and the guide columns on both sides of the push card are respectively adapted in the guide grooves of the base.

9. The magnetic latching relay with auxiliary contacts according to claim 8, characterized in that: A through opening is provided at the bottom of the groove of the base, and the through opening is communicated with the guide groove; a bottom cover plate is fixedly connected to the through opening, and a guide strip is provided in the bottom cover plate at a position corresponding to the guide column of the push card, and the guide column of the push card slides and presses on the corresponding guide strip.

10. The magnetic latching relay with auxiliary contacts according to claim 9, characterized in that: The upper and lower surfaces and the outer side surface of the guide column of the push card are respectively set as arc shapes; the upper end surface of the guide strip is also set as an arc surface.

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