Relay

Abstract

The utility model provides a relay, which comprises a magnetic circuit module, a contact module, a pushing card and an auxiliary contact, and is characterized in that the magnetic circuit module comprises a coil, a yoke and an armature assembly; the coil is electrified to generate different magnetic fields so as to drive the armature assembly to rotate, so that the two groups of attraction points are alternately attracted on the yoke; the armature assembly is connected with the movable spring part of the contact module through the pushing card; the auxiliary contact is provided with an auxiliary static spring and an auxiliary movable spring which correspond to each other, the pushing card is provided with a pushing part, the auxiliary movable spring and the pushing part are arranged correspondingly, and the armature assembly drives the pushing card to move back and forth and drives the auxiliary movable spring to act through the pushing part. And when the pull-in point of the armature assembly moves to a middle state of a half position of the maximum distance between the pull-in point and the yoke, the auxiliary movable spring is separated from the pushing part, and the auxiliary movable spring is separated from the pushing part. Therefore, the switching of the armature assembly is not influenced by the auxiliary movable spring, and the stable operation of the product is ensured.

Description

Technical Field

[0001] The utility model relates to a relay. Background Art

[0002] A relay (English name: relay) is an electrical control device. When the change of the input quantity (excitation quantity) reaches the specified requirement, it is an electrical appliance that causes a predetermined step change in the controlled quantity in the electrical output circuit. It has an interactive relationship between a control system (also called an input circuit) and a controlled system (also called an output circuit). It is usually applied to an automatic control circuit. In fact, it is an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] Most relays use a push card to connect the armature part and the moving spring part. At the same time, in order to more intuitively confirm the on-off state of the relay, an auxiliary switch is generally equipped. The auxiliary contacts of the auxiliary switch are integrated on the relay. When the push card drives the moving spring part to act, it also synchronously drives the auxiliary moving spring of the auxiliary contact to act. However, the push card additionally increases the cooperation with the auxiliary moving spring, which may have a certain impact on the action of the armature part. For example, during the alternating suction process of the armature part, the armature will separate from the yoke, and the suction force is weak. At this time, if the push card still acts on the auxiliary moving spring, the reaction force exerted by the auxiliary moving spring on the push card will hinder the switching of the armature part; ultimately resulting in inoperability. Summary of the Utility Model

[0004] Therefore, to solve the above problems, the utility model provides a relay.

[0005] To achieve the above object, the technical solution provided by the utility model is as follows:

[0006] A relay includes a magnetic circuit module, a contact module, a push card, and auxiliary contacts. The magnetic circuit module includes a coil, a yoke, and an armature assembly; the armature assembly has two sets of suction points; the coil is energized to generate different magnetic fields to drive the armature assembly to act so that the two sets of suction points alternately suck on the yoke; the armature assembly is connected to the moving spring part of the contact module through a push card; the auxiliary contacts have corresponding auxiliary static springs and auxiliary moving springs. A pushing part is arranged on the push card, and the auxiliary moving spring is arranged corresponding to the pushing part. The armature assembly drives the push card to move back and forth and drives the auxiliary moving spring to act through the pushing part. And when the suction point of the armature assembly moves to the intermediate state at half of the maximum distance from the yoke, the auxiliary moving spring is separated from the pushing part.

[0007] Further, the pushing part of the pushing card includes a first pushing part and a second pushing part which are arranged at intervals along the moving direction of the pushing card. The auxiliary moving spring is arranged between the first pushing part and the second pushing part. When the armature assembly moves to a position where the yoke is located in the middle of the two armatures, the auxiliary moving spring is separated from both the first pushing part and the second pushing part.

[0008] Further, the pushing card translates horizontally in the left - right direction, and the auxiliary contact is arranged below the pushing card.

[0009] Further, the height of the second pushing part is lower than that of the first pushing part; the second pushing part is formed on the arm extending downward from the pushing card.

[0010] Further, the second pushing part is also lower than the contact position of the auxiliary contact.

[0011] Further, the armature assembly is rotatably arranged. The coil is energized to generate different magnetic fields to drive the armature assembly to rotate, so that two sets of suction points are alternately sucked on the yoke. The auxiliary contact is arranged corresponding to the rotation axis of the armature assembly and is far from the suction points of the armature assembly.

[0012] Further, the armature part of the magnetic circuit module and the moving spring part of the contact module are arranged in the left - right direction, and the pushing card is arranged on the front side of the armature part and the moving spring part; the moving spring part has a first matching part and a second matching part, the pushing card has an installation notch with an opening facing downward, the first matching part is inserted into the installation notch of the pushing card and forms a forward limit on the pushing card, the second matching part cooperates with the pushing card and forms a limit in the left - right direction on the pushing card; and the first matching part and / or the second matching part form a downward limit on the pushing card; the armature part has a connecting part, the connecting part is fitted on the upper side of the pushing card and forms an upward limit on the pushing card; the auxiliary contact is arranged below the pushing card.

[0013] Further, the end of the first matching part is bent to form a front limit part, and the front limit part is located on the front side of the pushing card, so as to form a forward limit on the pushing card.

[0014] Further, a bayonet is provided on the rear side of the pushing card. The second matching part includes a plug - in part and a bent rear limit part. The plug - in part is inserted into the bayonet of the pushing card, so as to form a limit in the left - right direction on the pushing card, and the rear limit part abuts against the rear side surface of the pushing card to form a backward limit on the pushing card.

[0015] Further, the plug - in part inserted into the bayonet of the pushing card also forms at least a downward limit on the pushing card.

[0016] Further, an arc - shaped section for preventing chip scraping is formed by lateral bending at the upper end and / or the lower end of the plug - in part.

[0017] Further, the number of the contact modules is two groups, the moving spring parts of the two groups of contact modules are distributed on the left and right sides of the armature part, and the auxiliary contact is arranged at the middle position between the two groups of contact modules.

[0018] Further, it further includes a base and a cover shell. The magnetic circuit module, the contact module and the auxiliary contact are all assembled on the base; the cover shell covers the magnetic circuit module, the contact module, the auxiliary contact and the pushing card and is fixed to the base.

[0019] Further, the armature assembly is rotatably arranged and has two oppositely arranged armatures; the yoke is located on both sides of the armature assembly and extends between the two armatures; the first end of the first armature and the second end of the second armature form a set of attracting points; the second end of the first armature and the first end of the second armature form another set of attracting points.

[0020] Further, the auxiliary contact is a normally closed contact.

[0021] Further, in the intermediate state, the pushing card does not act on the moving spring part of the contact module; and it is defined that in the intermediate state, the distance between the auxiliary moving spring and the second pushing part is m, and the moving stroke of the pushing card driven by the armature assembly when switching from the intermediate state to the attracting position is n, and the distance m is less than the stroke n.

[0022] Through the technical solution provided by the present utility model, the following beneficial effects are achieved:

[0023] 1. The pushing part of the pushing card and the auxiliary moving spring are designed such that when the attracting point of the armature assembly moves to the intermediate state at half of the maximum distance from the yoke, the auxiliary moving spring is separated from the pushing part; so that in this intermediate state, the auxiliary moving spring does not contact the pushing card, and the switching of the armature assembly is not affected by the auxiliary moving spring, ensuring the stable operation of the product.

[0024] 2. The pushing part of the pushing card includes a first pushing part and a second pushing part arranged at intervals along the moving direction of the pushing card. The auxiliary moving spring is arranged between the first pushing part and the second pushing part. When the pushing card moves back and forth, the auxiliary moving spring is respectively pushed to act by the first pushing part and the second pushing part, and the action is stable.

[0025] 3. The auxiliary contact is arranged below the pushing card; the height of the second pushing part is lower than that of the first pushing part, forming an up-and-down matching manner; the second pushing part is formed on the arm extending downward from the pushing card; a relatively large distance can be set between the first pushing part and the arm, which is convenient for the insertion and assembly of the auxiliary moving spring; at the same time, since the second pushing part is formed on the arm extending downward from the pushing card, when the second pushing part pushes the auxiliary moving spring, a relatively flexible pushing effect will be formed.

[0026] 4. The pushing card translates horizontally in the left - right direction, and the auxiliary contact is arranged below the pushing card, making the structure more compact.

[0027] 5. The auxiliary contact is arranged corresponding to the rotation axis of the armature assembly and away from the suction point of the armature assembly. In this way, the auxiliary contact will not interfere with the movement of the armature assembly. At the same time, the creepage distance between the auxiliary contact and the contact module can be relatively large, which can well ensure the stability of the product.

[0028] 6. The pushing card is provided with a mounting notch with an opening facing downwards to cooperate with the first fitting part of the moving spring part and form a forward limit; the second fitting part cooperates with the rear side of the pushing card and forms a left - right direction limit for the pushing card; and the first fitting part and / or the second fitting part form a downward limit for the pushing card, while the connecting part of the armature part is fitted on the upper side of the pushing card and forms an upward limit for the pushing card; in this way, stable assembly of the armature part, the pushing card and the moving spring part is achieved; in actual assembly, the moving spring part, the pushing card and the armature part can be lapped and assembled in sequence from bottom to top, and mechanized assembly can be realized.

[0029] 7. The auxiliary contact is a normally - closed contact, which can reduce the influence of foreign matter contamination on the contact closure during assembly.

[0030] 8. In the intermediate state, the pushing card does not act on the moving spring part of the contact module; the moving spring part of the contact module will not exert a reaction force on the pushing card, further enabling the stable switching of the armature assembly; and it is defined that in the intermediate state, the distance between the auxiliary moving spring and the pushing part is m, and the moving stroke of the pushing card driven by the armature assembly when switching from the intermediate state to the suction position is n, and the distance m is less than the stroke n. In this way, first, the over - travel drive for closing the moving spring part of the contact module is carried out. After the over - travel of the moving spring part travels a certain distance, the pushing card contacts the auxiliary moving spring, and the over - travel drive for both the moving spring part of the contact module and the auxiliary moving spring of the auxiliary contact is carried out. In this way, the reliability of the contact module closing can be effectively ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Shown is the front view of the internal structure of the relay in the embodiment;

[0032] Figure 2 Shown is Figure 1 the enlarged schematic view of area A in

[0033] Figure 3 Shown is the top view of the internal structure of the relay in the embodiment shown;

[0034] Figure 4 Shown is Figure 3 the enlarged schematic view of area B in

[0035] Figure 5 The following is a top view of the assembly structure of the armature part, the moving spring part and the pushing card in the embodiment;

[0036] Figure 6 The following is a three-dimensional schematic diagram of the assembly of the pushing card and two groups of moving spring parts in the embodiment;

[0037] Figure 7 The following shows Figure 6 an enlarged schematic diagram of area C in;

[0038] Figure 8 The following is a schematic diagram of the structure of a single group of moving spring parts in the embodiment;

[0039] Figure 9 The following is a schematic diagram of the structure of the pushing card in the embodiment;

[0040] Figure 10 The following is an assembly schematic diagram of the pushing card in the left view position in the embodiment Figure 1 ;

[0041] Figure 11 The following is an assembly schematic diagram of the pushing card in the left view position in the embodiment Figure 2 ;

[0042] Figure 12 The following is a front view of the internal structure of the relay in another embodiment. Detailed implementation manners

[0043] To further illustrate the embodiments, the present invention provides drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0044] In the description of the present invention, the orientation or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0045] Now, the present invention will be further described in conjunction with the drawings and specific implementation manners.

[0046] Embodiment 1

[0047] Referring to Figures 1 to 3As shown in the figure, a relay provided in this embodiment includes a magnetic circuit module 1, a contact module 2, a pushing card 30, and an auxiliary contact 50. The magnetic circuit module 1 includes a coil 3, a yoke 4, and an armature assembly 10. The armature assembly 10 has two sets of attracting points. The yoke 4 plays a role in guiding magnetic flux. When the coil 3 is energized, different magnetic fields are generated to drive the armature assembly 10 to act, so that the two sets of attracting points are alternately attracted to the yoke 4. Specifically, in this embodiment, the armature assembly 10 is rotatably arranged. When the coil 3 is energized, different magnetic fields are generated to drive the armature assembly 10 to rotate, so that the two sets of attracting points are alternately attracted to the yoke 4. The armature assembly 10 has two relatively arranged armatures (the first armature 13 and the second armature 14 respectively). The yoke 4 is located on both sides of the armature assembly 10 (on the left and right sides in this embodiment) and extends between the two armatures. The first end 131 of the first armature (the first armature 13) and the second end 142 of the second armature (the second armature 14) form a set of attracting points. The second end 132 of the first armature (the first armature 13) and the first end 141 of the second armature (the second armature 14) form another set of attracting points.

[0048] When one set of attracting points is attracted to the yoke 4, the other set is separated from the yoke 4 and is at a position with the maximum distance (defined as distance L) from the yoke 4. During the rotation and switching of the armature assembly 10, there will be a state where the yoke 4 is not attracted to any armature. As Figures 1 to 3 shown, the yoke 4 is located at the middle position between the two armatures, that is, both sets of attracting points are at half of the maximum distance from the yoke 4 (that is, the distance between the attracting point and the yoke 4 is 0.5L). The state at this position is defined as the intermediate state.

[0049] Of course, in other embodiments, the structure of the armature assembly 10 is not limited to this, and other structures can also be used to replace it. For example, the armature assembly 10 can also use one armature, etc. Or the armature assembly 10 can also adopt a direct-acting structure in the prior art, etc.

[0050] The armature assembly 10 is connected to the moving contact part 20 of the contact module 2 through the pushing card 30. In this embodiment, the rotation of the armature assembly 10 drives the pushing card 30 to horizontally move left and right, thereby driving the moving contact part 20 of the contact module 2 to perform opening and closing actions.

[0051] The auxiliary contact 50 has a corresponding auxiliary static contact 51 and an auxiliary moving contact 52. The pushing card 30 is provided with pushing parts (the first pushing part 36 and the second pushing part 37 below in this embodiment). The auxiliary moving contact 52 is arranged corresponding to the pushing parts. The armature assembly 10 drives the pushing card 30 to move back and forth, and drives the auxiliary moving contact 52 to act through the pushing parts.

[0052] The intermediate state is the situation where the gap between the armature 4 and the yoke is the largest (i.e., the position with the minimum magnetic suction force). If the driving voltage of the coil 3 is insufficient, or the high-temperature environment causes the resistance of the coil 3 to increase, etc., the driving force becomes weaker, and the armature is more likely to stop in the intermediate state, resulting in problems such as the contact being suspended, having a small pressure, and a large resistance. At the same time, if the push card 30 needs to be equipped with a manual lever for the customer to use the lever to protect the circuit, in this case, there will be a situation where the lever has been switched off, but the contacts are still in contact, thus posing a risk. Therefore, when the armature assembly 10 moves to the intermediate state of separating from the yoke 4, the auxiliary moving spring 52 is separated from the push part. In this way, the switching of the armature assembly 10 is not affected by the auxiliary moving spring 52, ensuring the stable operation of the product.

[0053] Specifically, in this embodiment, the push part of the push card 30 includes a first push part 36 and a second push part 37 that are arranged at intervals along the moving direction of the push card 30, that is, the first push part 36 and the second push part 37 are arranged at intervals left and right. The auxiliary moving spring 52 is arranged between the first push part 36 and the second push part 37. When the push card 30 moves to the left, the auxiliary moving spring 52 is pushed by the second push part 37 on the right; when the push card 30 moves to the right, the auxiliary moving spring 52 is pushed by the first push part 36 on the left. And when the armature assembly 10 moves to the intermediate state of separating from the yoke 4, the auxiliary moving spring 52 is separated from both the first push part 36 and the second push part 37; that is, the auxiliary moving spring 52 is not in contact with both the first push part 36 and the second push part 37; as Figure 1 and Figure 2 shown.

[0054] The auxiliary contact 50 is arranged below the pushing card 30; the auxiliary static spring 51 and the auxiliary moving spring 52 of the auxiliary contact 50 are distributed left and right. The first pushing part 36 is located on the left side of the auxiliary moving spring 52, and the second pushing part 37 is located on the right side of the auxiliary moving spring 52. Since there is no interference from the auxiliary static spring 51 on the right side, in this embodiment, the height of the second pushing part 37 is conveniently set to be lower than that of the first pushing part 36; specifically, the second pushing part 37 is also lower than the contact point b position of the auxiliary contact 50; forming an up-and-down matching mode; the second pushing part 37 is formed on the branch arm 38 extending downward from the pushing card 30; the second pushing part 37 protrudes leftward from the branch arm 38. Therefore, a relatively large distance a can be set between the first pushing part 36 and the branch arm 38, which is convenient for the insertion and assembly of the auxiliary moving spring 52 and reduces chip scraping; in this specific embodiment, the auxiliary contact 50 is a normally closed contact. In the absence of external force, the auxiliary static spring 51 and the auxiliary moving spring 52 are in a closed state. When the pushing card 30 moves to the right, the first pushing part 36 approaches the auxiliary moving spring 52, and when the pushing card 30 moves to the right in place, the first pushing part 36 pushes the auxiliary moving spring 52 to the right to achieve opening. When the pushing card 30 moves to the left, the auxiliary moving spring 52 loses the acting force of the first pushing part 36 and resets itself. When the pushing card 30 moves to the left in place, the second pushing part 37 pushes the auxiliary moving spring 52 to move further to the left, providing an over-travel for the auxiliary moving spring 52; ensuring reliable closing of the auxiliary contact 50.

[0055] The auxiliary contact 50 adopts a normally closed contact, which can reduce the influence of foreign matter contamination on the contact closing contact during assembly.

[0056] In the intermediate state, the pushing card 30 does not act on the moving spring part 20 of the contact module 2; that is, the moving spring part 20 of the contact module 2 does not exert a reaction force on the pushing card 30; further ensuring the stable switching of the armature assembly 10. In this embodiment, the moving spring part 20 of the contact module 2 is also of a normally closed structure; that is, in the intermediate state, the contact module 2 is in the closing position. And it is defined that in the intermediate state, the distance between the auxiliary moving spring 52 and the pushing part (the second pushing part 37 in this embodiment) is m, and the moving stroke of the pushing card 30 driven by the armature assembly 10 when switching from the intermediate state to the attracting position is n, and the distance m is less than the stroke n. Thus, the pushing card 30 is from Figures 1 to 3When the shown intermediate state moves to the left, first perform an over-travel drive to close the moving contact part 20 of the contact module 2. After the over-travel of the moving contact part 20 travels a certain distance (spacing m), push the latch 30 to contact the auxiliary moving contact 52, and perform an over-travel drive on both the moving contact part 20 of the contact module 2 and the auxiliary moving contact 52 of the auxiliary contact 50. In this way, the reliability of closing the contact module 2 can be effectively ensured. Of course, in other embodiments, the moving contact part 20 of the contact module 2 can also be a normally open structure. When the armature assembly 10 switches from the intermediate state to the attracted position, the push latch first pushes the moving contact part 20 to close, and then performs an over-travel drive for closing the moving contact part 20.

[0057] Further, the auxiliary contact 50 is arranged corresponding to the rotation shaft 15 of the armature assembly 10, so as to be away from the attraction point of the armature assembly 10 (that is, away from the first end 141 and the second end 142 of the second armature 14 in the figure). In this way, the auxiliary contact 50 is not likely to interfere with the movement of the armature assembly. That is, when the armature assembly 10 rotates, the first end 141 and the second end 142 of the second armature 14 are not likely to interfere with the auxiliary contact 50. Therefore, when the space is limited, the auxiliary contact 50 can be arranged closer to the armature assembly 10, and the structure is more compact. At the same time, it is also away from the contact module 2, so that the creepage distance between the auxiliary contact 50 and the contact module 2 is relatively large, which can well ensure the stability of the product. In addition, in this embodiment, the auxiliary contact 50 is arranged below the push latch 30 and is arranged vertically in the same height direction, without occupying extra area, that is, the space utilization rate is higher, the structure is more compact, and it is beneficial to realize the miniaturized assembly of the product.

[0058] Of course, in other embodiments, the structure and the cooperation relationship of the auxiliary contact 50 and the pushing part are not limited to this. For example, when the auxiliary contact 50 is a normally closed contact, the number of the pushing parts can also be single (that is, the above-mentioned first pushing part 36), or the auxiliary contact 50 can also adopt a normally open contact; or the height of the above-mentioned first pushing part 36 is set lower than that of the second pushing part 37. However, the lowest position of the first pushing part 36 is affected by the auxiliary static contact 51 on the same side.

[0059] Continue to refer to Figures 5 to 9As shown, the number of the contact modules 2 is two groups. The moving spring parts 20 of the two groups of contact modules 2 are distributed on the left and right sides of the armature part 10, and the auxiliary contact 50 is arranged at the middle position between the two groups of contact modules 2. In this embodiment, the pushing card 30 has an assembling part (the convex bud 33 below in this embodiment) connected to the armature assembly 10, and the auxiliary contact 50 is arranged directly below the assembling part of the pushing card 30. With such an arrangement, the creepage distance between the auxiliary contact 50 and the contact module 2 can be relatively large, which can well ensure the stability of the product. At the same time, the space at this position is relatively sufficient and will not affect the movement of the armature part 10; the assembling structure is also compact, ensuring the miniaturization of the product.

[0060] The pushing card 30 is arranged at the front side of the armature part 10 and the moving spring part 20. Among them, the moving spring part 20 has a first fitting part 21 and a second fitting part 22. Specifically, in this embodiment, the first fitting part 21 is located below the second fitting part 22. The pushing card 30 has an installation notch 31 with an opening facing downwards. The first fitting part 21 is inserted into the installation notch 31 of the pushing card 30 and forms a forward limit for the pushing card 30. Specifically, in this embodiment, the end of the first fitting part 21 is bent to form a front limit part 211. When the first fitting part 21 is inserted into the installation notch 31 of the pushing card 30, the front limit part 211 formed by the bending of the end of the first fitting part 21 is located at the front side of the pushing card 30, thereby forming a forward limit for the pushing card 30. Of course, in other embodiments, the structure of the first fitting part 21 is not limited to this, as long as it can be inserted into the installation notch 31 of the pushing card 30 and form a forward limit for it.

[0061] The second fitting part 22 cooperates with the rear side of the pushing card 30 and forms a limit for the pushing card 30 in the left - right direction; at the same time, the second fitting part 22 also forms a downward limit for the pushing card 30; and there is a relatively large distance between the upper end of the first fitting part 21 and the upper side wall of the installation notch 31. In this embodiment, a bayonet 32 is formed at the rear side of the pushing card 30. Specifically, the bayonet 32 penetrates from the rear side to the front side, forming a completely penetrating window. Of course, in other embodiments, the bayonet 32 may not penetrate to the front side. The second fitting part 22 includes a plugging part 23 and a bent rear limit part 24. The plugging part 23 is inserted into the bayonet 32 of the pushing card 30, thereby forming at least a downward and left - right limit for the pushing card 30, and the rear limit part 24 abuts against the rear side surface of the pushing card 30 to form a rearward limit for the pushing card 30.

[0062] The armature part 10 has a connecting part 11, and the connecting part 11 cooperates with the upper side of the pushing card 30 and forms an upward limit for the pushing card 30.

[0063] In this way, by the cooperation of the pushing card 30 with the armature part 10 and the moving spring part 20, the pushing card 30 is limited in six directions: up, down, left, right, front, and back, so that a stable assembly is formed among the pushing card 30, the armature part 10, and the moving spring part 20. At the same time, in actual assembly, the moving spring part 20, the pushing card 30, and the armature part 10 can be assembled in a lap joint manner from bottom to top, enabling mechanized assembly. The specific method is as follows: Figure 10 and Figure 11 As shown, first, the moving spring part 20 is fitted in place. Then, the pushing card 30 is assembled from top to bottom. Among them, the installation notch 31 of the pushing card 30 is aligned with the first fitting part 21 and installed downward. Preferably, in order to prevent the pushing card 30 from interfering with other parts of the moving spring part 20 (such as the second fitting part 22), when the pushing card 30 is assembled, it moves obliquely downward from front to back to achieve installation, so that the installation notch 31 is stuck on the first fitting part 21, and the rear side is in lap joint with the second fitting part 22 of the moving spring part 20. Finally, the armature part 10 is installed, and the connecting part 11 of the armature part 10 is fitted at the corresponding position on the upper side of the pushing card 30. At the same time, the auxiliary contact 50 is located below the pushing card 30 without affecting the assembly of the pushing card 30.

[0064] In actual use, the left and right swing of the armature part 10 drives the pushing card 30 to translate left and right, and then drives the moving spring part 20 to perform opening and closing operations. During this process, the left and right translation of the pushing card 30 drives the moving spring part 20 to act through the limit cooperation between the bayonet 32 and the insertion part 23. To reduce the debris generated by the mutual friction between the inner wall of the insertion part 23 and the bayonet 32, in this embodiment, the upper and lower ends of the insertion part 23 are both bent laterally to form an arc section 231 for preventing chip scraping, so that the insertion part 23 forms a structure similar to a "C" shape. In this way, the tip contact between the insertion part 23 and the inner wall of the bayonet 32 is effectively reduced, avoiding the generation of debris due to tip friction. At the same time, the upper and lower arc sections 231 and the bayonet 32 form a limit in the up and down directions, which also well prevents the pushing card 30 from swinging and offsetting in the up and down directions. Of course, in other embodiments, the insertion part 23 can also be bent at one end (such as the upper end or the lower end) to form an "L" shape. Further preferably, the front end part 232 of the insertion part 23 is also bent inward to minimize the exposure of the tip as much as possible.

[0065] Specifically, in order to ensure the strength of the pushing card 30 itself, in this embodiment, the bayonet 32 that penetrates through the front and back is not connected to the installation notch 31 below.

[0066] The left and right limit or up and down limit between the bayonet 32 and the insertion part 23 can be a limit with a certain relative movement amount, that is, the insertion part 23 can move a certain distance in the bayonet 32 and then be limited; it can also be a complete limit, that is, the insertion part 23 cannot move relative to the bayonet 32.

[0067] Further, in order to synchronously implement the structures of the insertion part 23 of the first mating part 21 and the second mating part 22 and the rear limiting part 24 of the second mating part 22, in this embodiment, the same moving spring part 20 includes two moving spring pieces (the first moving spring piece 201 and the second moving spring piece 202 respectively), and the two moving spring pieces are attached to each other; among them, one moving spring piece (the first moving spring piece 201) forms the insertion part 23 of the first mating part 21 and the second mating part 22. In this embodiment, the insertion part 23 of the first mating part 21 and the second mating part 22 is formed by two bifurcations separated from the same moving spring piece (the first moving spring piece 201); and the front end of the other moving spring piece (the second moving spring piece 202) is bent to form the rear limiting part 24, that is, the rear limiting part 24 is a plate-like structure formed by bending, with good limiting effect, and also effectively reduces the contact between the moving spring part 20 and the tip of the push card 30. Of course, in other embodiments, the same moving spring part 20 may also be provided with one moving spring piece, or more than two moving spring pieces, etc. Or, the second mating part 22 is not limited to this. For example, the second mating part 22 is a limiting concave part formed on the moving spring part 20 with an opening facing forward, and the rear side of the push card 30 protrudes backward with a limiting convex part. By fitting the limiting convex part of the push card 30 into the limiting concave part of the moving spring part 20, the limiting of the push card 30 in the backward and left-right directions can also be achieved.

[0068] Specifically, the second mating part 22 also forms a backward limit on the push card 30, making the limit of the push card 30 more comprehensive and the movement more reliable. Of course, in other embodiments, a backward limit may not be formed on the push card 30. In this way, the armature part 10 can also drive the moving spring part 20 to perform basic opening and closing operations through the push card 30.

[0069] A convex bud 33 is provided on the upper side of the push card 30, that is, the assembly part on the push card 30 is the convex bud 33; an assembly groove hole 12 is provided on the connecting part 11 of the armature part 10, and the convex bud 33 of the push card 30 is fitted into the assembly groove hole 12 of the connecting part 11 of the armature part 10. Specifically, the assembly groove hole 12 is a long groove hole, and there is an assembly allowance between the convex bud 33 and the assembly groove hole 12 to ensure that the swing of the armature part 10 and the left-right translation of the push card 30 do not interfere with each other.

[0070] Further, a limiting groove 34 is recessed downward on the upper side of the pushing card 30. The limiting groove 34 has a rear opening penetrating through the rear side of the pushing card 30, and the convex bud 33 is formed at the bottom of the limiting groove 34. The connecting portion 11 of the armature portion 10 is assembled in the limiting groove 34. In this way, the connecting portion 11 of the armature portion 10 will not protrude from the upper side surface of the pushing card 30, achieving a compact assembly. At the same time, the limiting groove 33 has a front side wall 35, that is, the limiting groove 33 will not completely penetrate to the front side of the pushing card 30. In this way, the strength of the pushing card 30 can be effectively guaranteed.

[0071] Certainly, in other embodiments, the arrangement of the pushing card 30 and the connecting portion 11 of the armature portion 10 is not limited to this. For example, the positions of the convex bud 33 and the assembly slot hole 12 can be interchanged, that is, an assembly slot hole is provided on the upper side of the pushing card 30, and a downwardly extending convex bud is provided on the connecting portion 11 of the armature portion 10. The convex bud of the connecting portion 11 of the armature portion 10 is fitted in the assembly slot hole of the pushing card 30. In this way, assembly and limiting can also be achieved.

[0072] In this embodiment, there are two sets of contact modules 2. The two moving spring parts 20 are respectively located on the left and right sides of the armature portion 10. The pushing card 30 is simultaneously assembled with the armature portion 10 and the two sets of moving spring parts 20 and is suspended and supported. That is, the left and right ends of the pushing card 30 are respectively supported by the two sets of moving spring parts 20, and the upper side position of the middle part is restricted by the armature portion 10, and it can be suspended without additional support by external components, reducing friction with external components and having a better force transmission effect. Certainly, in other embodiments, there can also be one set of contact modules 2. When there is one set, the lower side of the end of the pushing card 30 away from the contact module 2 needs to be supported by other components.

[0073] Further, it further includes a base 40 and a cover shell (not shown). The magnetic circuit module 1, the contact module 2, and the auxiliary contact 50 are all assembled onto the base 40. The cover shell covers the magnetic circuit module 1, the contact module 2, the auxiliary contact 50, and the pushing card 30 and is fixed to the base 40 to achieve external packaging.

[0074] Embodiment 2

[0075] A relay provided in this embodiment has a structure substantially the same as that of the relay provided in Embodiment 1, except that: as shown in reference to Figure 12 In this embodiment, the first pushing portion 36 and the second pushing portion 37 of the pushing card 30 are at the same horizontal height. In this way, when the horizontal distance between the first pushing portion 36 and the second pushing portion 37 remains unchanged, the size of the socket for the auxiliary moving spring 52 to insert is relatively small; and it does not have the relatively flexible pushing effect formed when the second pushing portion 37 in Embodiment 1 pushes the auxiliary moving spring 52.

[0076] Embodiment III

[0077] A relay provided in this embodiment is generally the same in structure as that in Embodiment I, except that: in this embodiment, the first fitting portion 21 of the moving spring portion 20 is inserted into the mounting notch 31 of the pushing card 30, and the front limiting portion 211 with a bent end is located on the front side of the pushing card 30, thereby forming a forward limit for the pushing card 30. At the same time, the upper end of the first fitting portion 21 abuts against the upper side wall of the mounting notch 31 to form a downward limit for the pushing card 30.

[0078] Specifically, in order to avoid scraping debris, the upper end of the first fitting portion 21 in this embodiment is also bent.

[0079] Of course, in other embodiments, for the downward limit of the pushing card 30, it can also be restricted by the first fitting portion 21 and the second fitting portion 22 at the same time.

[0080] Embodiment IV

[0081] A relay provided in this embodiment is generally the same in structure as that in Embodiment I, except that: a contact module 2 is further provided on the front side of the pushing card 30, and the moving spring portion 20 of the front contact module 2 forms a limit in the left - right direction with the pushing card 30. As in this embodiment, there are four groups of contact modules 2, that is, two groups of contact modules 2 are provided on each of the left and right sides; the two groups of contact modules 2 on the same side are distributed on the front and rear sides of the pushing card; that is, on the basis of the structure provided in Embodiment I, the contact module 2 is added to the front side of the pushing card 30, and the limit of the pushing card 30 is still cooperated by the moving spring portion 20 at the rear side (i.e., the same cooperation structure as in Embodiment I); the moving spring portion 20 of the newly added front contact module 2 only forms a limit in the left - right direction with the pushing card 30, that is, the pushing card 30 only needs to be able to drive the moving spring portion 20 of the front contact module 2 to act.

[0082] Specifically, the moving spring portion 20 of the front contact module 2 can also be provided with a plug - in portion 23, and it can be inserted into the bayonet 31 of the pushing card 30 from the front through the plug - in portion 23. Correspondingly, the thickness of the pushing card 30 can be increased to meet the insertion of the plug - in portions 23 of the two moving spring portions 20 at the front and rear.

[0083] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.

Claims

1. A relay, comprising a magnetic circuit module, a contact module, a push card and an auxiliary contact, wherein the magnetic circuit module comprises a coil, a yoke and an armature assembly; the armature assembly has two sets of suction points; the coil is energized to generate different magnetic fields to drive the armature assembly to move so that the two sets of suction points are alternately attracted to the yoke; the armature assembly is connected to the movable spring part of the contact module through the push card; characterized in that: The auxiliary contact has corresponding auxiliary static springs and auxiliary dynamic springs, a pushing portion is provided on the pushing card, the auxiliary dynamic spring is provided corresponding to the pushing portion, the armature assembly drives the pushing card to move back and forth and drives the auxiliary dynamic spring to move through the pushing portion, and when the attraction point of the armature assembly moves to an intermediate state of half the maximum distance from the yoke iron, the auxiliary dynamic spring separates from the pushing portion.

2. The relay according to claim 1, characterized in that: The pushing part of the pushing card includes a first pushing part and a second pushing part arranged at intervals along the moving direction of the pushing card, and the auxiliary dynamic spring is arranged between the first pushing part and the second pushing part. When the armature assembly moves to an intermediate state separated from the yoke, the auxiliary dynamic spring is separated from the first pushing part and the second pushing part.

3. The relay according to claim 2, characterized in that: The push card moves horizontally in the left-right direction, and the auxiliary contact is arranged below the push card.

4. The relay according to claim 3, characterized in that: The height of the second pushing portion is lower than that of the first pushing portion; the second pushing portion is formed on a support arm extending downward from the pushing card.

5. The relay according to claim 4, characterized in that: The second pushing portion is also lower than the contact point position of the auxiliary contact.

6. The relay according to claim 1, characterized in that: The armature assembly is rotatably arranged, and the coil is energized to generate different magnetic fields to drive the armature assembly to rotate so that two sets of attraction points are alternately attracted to the yoke, and the auxiliary contact is arranged corresponding to the rotating shaft of the armature assembly and away from the attraction point of the armature assembly.

7. The relay according to claim 1, characterized in that: The armature part of the magnetic circuit module and the movable spring part of the contact module are arranged along the left and right directions, and the push card is arranged on the front sides of the armature part and the movable spring part; the movable spring part has a first matching part and a second matching part, and the push card has a mounting notch with an opening facing downward, the first matching part is inserted into the mounting notch of the push card and forms a forward limit for the push card, and the second matching part cooperates with the push card and forms a left and right limit for the push card; and the first matching part and / or the second matching part forms a downward limit for the push card; the armature part has a connecting part, and the connecting part cooperates with the upper side of the push card and forms an upward limit for the push card; the auxiliary contact is arranged below the push card.

8. The relay according to claim 7, characterized in that: The end of the first matching portion is bent to form a front limiting portion, and the front limiting portion is located at the front side of the push card, thereby limiting the push card forward.

9. The relay according to claim 7, characterized in that: A bayonet is provided on the rear side of the push card, and the second matching portion includes an inserting portion and a bent rear limiting portion, the inserting portion is inserted into the bayonet of the push card, thereby limiting the push card in the left and right directions, and the rear limiting portion abuts against the rear side surface of the push card to limit the push card backwards.

10. The relay according to claim 9, characterized in that: The plug-in portion is inserted into the slot of the push card and at least forms a downward limit for the push card.

11. The relay according to claim 1 or 6 or 7, characterized in that: There are two groups of contact modules, the movable spring parts of the two groups of contact modules are distributed on the left and right sides of the armature part, and the auxiliary contacts are arranged in the middle of the two groups of contact modules.

12. The relay according to claim 1, characterized in that: It also includes a base and a cover shell, and the magnetic circuit module, the contact module and the auxiliary contact are all assembled on the base; the cover shell covers the magnetic circuit module, the contact module, the auxiliary contact and the push card and is fixed to the base.

13. The relay according to claim 1, characterized in that: The armature assembly can be rotatably arranged and has two armatures arranged opposite to each other; the yoke is located on both sides of the armature assembly and extends between the two armatures; the first end of the first armature and the second end of the second armature form a group of attraction points; the second end of the first armature and the first end of the second armature form another group of attraction points.

14. The relay according to claim 2, characterized in that: The auxiliary contact is a normally closed contact.

15. The relay according to claim 14, characterized in that: In the intermediate state, the push card does not act on the dynamic spring part of the contact module; and it is defined that in the intermediate state, the distance between the auxiliary dynamic spring and the second push part is m, and the armature assembly drives the push card to move a stroke of n when it switches to the attracted position in the intermediate state, and the distance m is smaller than the stroke n.

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