Electromagnetic relay

Abstract

An electromagnetic relay comprises a base, an electromagnetic part, a contact part and a shell. The electromagnetic part and the contact part are mounted on the base, and the shell covers the base and surrounds the electromagnetic part and the contact part; the contact part comprises a static reed, the static reed extends along the height direction of the base, one end of the static reed is provided with a first plugging end penetrating through the base, the other end of the static reed is provided with a second plugging end penetrating through the shell, a static contact is arranged between the first plugging end and the second plugging end, and the static reed is provided with a first ring groove on the second plugging end; the annular groove is formed in the position, connected with the shell in an inserted mode, of the second inserting end so as to prevent glue from flowing into the shell along the second inserting end, a groove is further formed in the static reed opposite to the side wall, in the length direction of the base, of the shell, the static contact is located in the groove, and a gap is formed between the static contact and the opposite side wall of the shell. According to the utility model, stable and reliable performance of relay components can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical components field, especially an electromagnetic relay. BACKGROUND

[0002] The existing electromagnetic relay is generally composed of a base, a magnetic circuit system and a contact system installed on the base, a shell covering the base, the magnetic circuit system and the contact system, etc. The contact system includes a static spring piece and a dynamic spring piece provided with contacts. The dynamic spring piece is connected with a dynamic spring piece pin, and the base is provided with a mounting groove for mounting the dynamic spring piece pin and the static spring piece.

[0003] During the production process of the electromagnetic relay, the dynamic spring piece pin and the static spring piece need to be fixed by spot gluing. During spot gluing, since the glue has fluidity, the glue will flow into the inside of the shell along the static spring piece or the dynamic spring piece pin, which can easily affect the performance of the contact system and cause hidden dangers. In addition, as the use scenarios of the relay are increasing, the requirements for various parameters of the relay are also increasing. The relay is required to have a small size, but the reduction in size means that the space inside the relay is small, and the layout and installation of various components are prone to problems. For example, the creepage distance between the contact part and the magnetic circuit part is too small; during assembly, the static contact of the static spring piece close to the inner wall of the shell can be scratched with the shell to generate contact plastic debris, which can affect the performance of the contact part. SUMMARY

[0004] The main purpose of the utility model is to overcome the above-mentioned defects in the prior art, and to provide an electromagnetic relay to ensure stable and reliable performance of the contact part.

[0005] The utility model adopts the following technical scheme:

[0006] An electromagnetic relay includes a base, an electromagnetic part, a contact part and a shell. The electromagnetic part and the contact part are installed on the base, and the shell covers the outside of the base and surrounds the electromagnetic part and the contact part. The contact part includes a static spring piece. The static spring piece extends along the height direction of the base and is provided with a first plug-in end penetrating through the base at one end and a second plug-in end penetrating the shell at the other end. A static contact is arranged between the first plug-in end and the second plug-in end. A first ring groove is arranged on the second plug-in end of the static spring piece. The ring groove is formed at the plug-in position of the second plug-in end with the shell to block the glue flowing into the shell along the second plug-in end. A groove is further arranged on the static spring piece opposite to the side wall of the shell along the length direction of the base. The static contact is located at the groove and has a spacing with the side wall of the shell.

[0007] The base is provided with a first slot for the first plug-in end to be inserted through; the shell is provided with a first insertion hole for the second plug-in end to be inserted through; the first ring groove is close to the inner side of the first insertion hole opposite to the base.

[0008] The first ring groove is radially concave along the second plug-in end.

[0009] The contact part is provided with at least two static spring blades, and the base is correspondingly provided with at least two first slots for the first plug-in end of the corresponding static spring blades to be inserted, the first slots extend along the height direction of the base, and an empty slot is formed between two adjacent first slots; the moving contact of the contact part is located above the empty slot.

[0010] The base is provided with a second slot, and the shell is provided with a second insertion hole; the contact part is further provided with a moving spring blade and a moving spring lead-out blade, the moving spring blade is connected with the moving spring lead-out blade, one end of the moving spring lead-out blade passes through the second slot, and the other end of the moving spring lead-out blade passes through the second insertion hole and is provided with a second ring groove; the second ring groove is close to the inner side of the second insertion hole opposite to the base to block the glue from flowing into the shell along the moving spring lead-out blade.

[0011] The second ring groove is radially concave along the moving spring lead-out blade.

[0012] The static spring blade is provided with a bent part close to the moving contact at the first plug-in end or the second plug-in end, and the groove is concave on the surface of the bent part opposite to the side wall of the shell.

[0013] The electromagnetic part includes a coil assembly, a yoke, an armature and a push card; the yoke includes a first yoke part and a second yoke part extending along the length direction of the base, the first yoke part is arranged in the coil assembly, and one end of the first yoke part and the second yoke part is connected; the armature is arranged along the height direction of the base and located at the other end of the first yoke part and the second yoke part, one end of the armature is overlapped on the corresponding end of the second yoke part; the push card is arranged along the length direction of the base, and one end of the push card is connected with one end of the armature, and the other end of the push card is connected with the moving spring blade of the contact part; the moving spring blade is driven to move by the armature swinging.

[0014] The base is provided with a mounting slot, the electromagnetic part is located in the mounting slot, and the contact part is located outside the mounting slot; the shell is provided with a baffle extending along the height direction of the base on the side opposite to the base, and the baffle is located on the outer periphery of the side wall adjacent to the mounting slot and the contact part.

[0015] The side of the shell opposite to the base is further provided with a first accommodating groove and a second accommodating groove extending along the height direction of the base; the second plug-in end of the static spring sheet is arranged in the first accommodating groove; and the end of the moving spring lead-out sheet away from the base is arranged in the second accommodating groove.

[0016] From the above description of the utility model, compared with the prior art, the utility model has the following beneficial effects:

[0017] 1、 The first ring groove is arranged on the second plug-in end of the static spring sheet to prevent glue from flowing into the shell along the second plug-in end, and the recess is further arranged at the static contact mounting position of the static spring sheet close to the side wall of the shell to increase the spacing between the static contact and the side wall of the shell, avoid scratching, and ensure the reliability and stability of the contact performance of the static spring sheet.

[0018] 2、 The first ring groove is arranged on the second plug-in end of the static spring sheet to prevent glue from flowing into the shell along the second plug-in end, and the recess is further arranged at the static contact mounting position of the static spring sheet close to the side wall of the shell to increase the spacing between the static contact and the side wall of the shell, avoid scratching, and ensure the reliability and stability of the contact performance of the static spring sheet.

[0019] 3、 The second ring groove is arranged on the moving spring lead-out sheet, the second ring groove is arranged on the second plug-in end of the static spring sheet to prevent glue from flowing into the shell along the second plug-in end, and the recess is further arranged at the static contact mounting position of the static spring sheet close to the side wall of the shell to increase the spacing between the static contact and the side wall of the shell, avoid scratching, and ensure the reliability and stability of the contact performance of the static spring sheet.

[0020] 4、 The accommodating groove is arranged to separate the electromagnetic part and the contact part, realize the insulation creepage isolation of the frame type, the electromagnetic part comprises a coil assembly, a yoke, an armature and a push card, the yoke is provided with a first yoke part and a second yoke part, the first yoke part is arranged in the coil assembly, the armature is overlapped on the second yoke part and connected with the push card, the armature is swung to drive the push card to move and drive the moving spring sheet to act, the push rod type structure is adopted, the electromagnetic part is compact in structure, and the overall volume is reduced.

[0021] 5、 The first slot and the second slot are arranged on the base, the first plug-in end of the static spring sheet is inserted and passes through the first slot, the moving spring lead-out sheet is inserted and passes through the second slot, and the air slot is arranged between the two adjacent first slots, so that the plug-in connection of the static spring sheet and the moving spring lead-out sheet with the base is more stable, and the insulation creepage distance is increased.

[0022] 6. The utility model discloses a first accommodating groove and second accommodating groove are further provided on the base, are used for accommodating the second plug -in end of static spring piece and the corresponding end of dynamic spring lead -out piece respectively, are used for strengthening the insulation between the adjacent static spring piece of dynamic spring part, between dynamic spring piece and static spring lead -out piece. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure diagram of the utility model;

[0024] Figure 2 It is the front view of Figure 1 ;

[0025] Figure 3 It is the explosion drawing of Figure 1 ;

[0026] Figure 4 It is the structure diagram of one static spring piece;

[0027] Figure 5 It is the side view of Figure 4 ;

[0028] Figure 6 It is the partial enlarged view of Figure 4 ;

[0029] Figure 7 It is the partial enlarged view of Figure 5 ;

[0030] Figure 8 It is the structure diagram of another static spring piece;

[0031] Figure 9 It is the side view of Figure 8 ;

[0032] Figure 10 It is the partial enlarged view of Figure 8 ;

[0033] Figure 11 It is the partial enlarged view of Figure 9 ;

[0034] Figure 12 It is the structure diagram of dynamic spring lead -out piece;

[0035] Figure 13 It is the front view of Figure 12 ;

[0036] Figure 14 It is the partial enlarged view of Figure 12 ;

[0037] Figure 15 It is the partial enlarged view of Figure 13 ;

[0038] Figure 16The utility model discloses a structure diagram (without shell body);

[0039] Figure 17 The utility model discloses a sectional view;

[0040] Among them:

[0041] 10, base, 11, mounting groove, 12, first insertion slot, 13, second insertion slot, 14, empty slot, 20, contact part, 21, static spring piece, 21a, first insertion end, 21b, second insertion end, 21c, recess, 21d, first ring groove, 21e, bending part, 22, static contact, 22a, contact rod, 23, dynamic spring piece, 24, dynamic spring lead-out piece, 24a, second ring groove, 25, dynamic contact, 30, electromagnetic part, 31, coil assembly, 32, yoke, 32a, first yoke part, 32b, second yoke part, 33, armature, 34, push card, 40, shell, 41, first accommodating groove, 42, second accommodating groove, 43, first insertion hole, 44, second insertion hole.

[0042] The utility model will be further described in the following in combination with the drawings and specific embodiments. Specific embodiments

[0043] The utility model will be further described in the following in combination with the drawings and specific embodiments.

[0044] Reference Figures 1 to 17 An electromagnetic relay includes a base 10, an electromagnetic part 30, a contact part 20 and a shell 40. The electromagnetic part 30 and the contact part 20 are installed on the base 10, and the shell 40 covers the outside of the base 10 and surrounds the electromagnetic part 30 and the contact part 20. The contact part 20 includes a static spring piece 21, which extends along the height direction of the base 10 and has a first insertion end 21a passing through the base 10 at one end, and the first insertion end 21a is partially exposed outside the base 10. The other end of the static spring piece 21 is provided with a second insertion end 21b passing through the shell 40, and the static contact 22 is arranged between the first insertion end 21a and the second insertion end 21b. The static spring piece 21 is provided with a first ring groove 21d on the second insertion end 21b, and the first ring groove 21d is formed at the insertion position of the second insertion end 21b and the shell 40. The first ring groove 21d can prevent glue from flowing into the shell 40 through the second insertion end 21b when the static spring piece 21 is glued, so as to avoid affecting the contact performance of the static spring piece 21. The number of static spring pieces 21 can be one or two or more, and each static spring piece 21 is provided with a first ring groove 21d.

[0045] The base 10 is provided with a first slot 12 at the position of the contact portion 20, the first slot 12 is used for inserting and passing through the first plug-in end 21a. The shell 40 is provided with a first insertion hole 43 at the position opposite to the second plug-in end 21b, the first insertion hole 43 is used for inserting and passing through the second plug-in end 21b, the first ring groove 21d is close to the inner side of the first insertion hole 43 opposite to the base 10, the first ring groove 21d is concave along the radial direction of the second plug-in end 21b. This concave structure can block the glue flowing along the second plug-in end 21b towards the fixed contact 22.

[0046] The contact portion 20 is further provided with a moving spring sheet 23 and a moving spring lead sheet 24, the moving spring lead sheet 24 is arranged on the side of the base 10 away from the fixed spring sheet 21 in the width direction. One end of the moving spring sheet 23 is connected with the moving spring lead sheet 24, the other end of the moving spring sheet 23 extends to the position opposite to the fixed spring sheet 21 along the width direction of the base 10 and is provided with a moving contact 25, the moving contact 25 is opposite to the fixed contact 22, the moving contact 25, the moving spring lead sheet 24 and the moving spring sheet 23 are connected by riveting. The base 10 is provided with a second slot 13 at the position of the moving spring lead sheet 24 of the contact portion 20, one end of the moving spring lead sheet 24 passes through the second slot 13, the other end of the moving spring lead sheet 24 passes through the shell 40 and is provided with a second ring groove 24a. The shell 40 is provided with a second insertion hole 44 at the position opposite to the moving spring lead sheet 24, the second ring groove 24a is close to the inner side of the second insertion hole 44 opposite to the base 10, the second ring groove 24a is concave along the radial direction of the moving spring lead sheet 24. This concave structure can block the glue flowing along the moving spring lead sheet 24 into the shell 40, avoiding affecting the contact performance of the moving spring sheet 23.

[0047] In the embodiment, for the contact portion 20 provided with at least two fixed spring sheets 21, the base 10 is correspondingly provided with at least two first slots 12, the first slot 12 extends along the height direction of the base 10 and penetrates through, the first plug-in end 21a is inserted and passes through the first slot 12, ensuring the stability of the fixed spring sheet 21, the fixed contact 22 is located above the first slot 12. The two adjacent first slots 12 form an empty slot 14, the moving contact 25 of the contact portion 20 is located above the empty slot 14. By arranging the slot for the fixed spring sheet 21 to pass through on the base 10, and arranging the empty slot 14 between the adjacent slots, the insulation creepage distance can be increased.

[0048] For the case of multiple static reed 21, multiple static reed 21 is arranged along the length direction of the base 10 interval distribution. Then in the length direction of the base 10, a static reed 21 is close to the electromagnetic part 30, which can be used as a normally open contact; another static reed 21 is away from the electromagnetic part 30 and close to the side wall of the shell 40, which can be used as a normally closed contact, the two static contacts 22 of the two static reeds 21 are oppositely arranged, and the moving contact 25 is located between the two static contacts 22. Among them, the upper of the static reed 21 opposite to the side wall of the shell 40 along the length direction of the base 10 is also provided with a groove 21c, and the static contact 22 is located at the groove 21c and has a gap between the opposite side wall of the shell 40.

[0049] The static reed 21 of the utility model is provided with a bending part 21e at the first plug-in end 21a close to the moving contact 25, or a bending part 21e is provided at the second plug-in end 21b close to the moving contact 25, and the groove 21c is concave in the surface of the bending part 21e opposite to the side wall of the shell 40. By designing the stamping groove on the static reed 21, the surface of the contact rod 22a of the static contact 22 is concave relative to the bending part 21e, without exceeding the surface of the static reed 21, avoiding scratching the contact rod 22a of the static contact 22 during assembly of the shell 40.

[0050] The electromagnetic part 30 includes a coil assembly 31, a yoke 32, an armature 33 and a push card 34. The coil assembly 31 is arranged along the length direction of the base 10, which includes a skeleton and a coil, and the coil is wound around the outer periphery of the skeleton. The yoke 32 includes a first yoke part 32a and a second yoke part 32b extending along the length direction of the base 10, the first yoke part 32a is arranged through the skeleton of the coil assembly 31, and the first yoke part 32a and the second yoke part 32b are connected at one end in the length direction of the base 10. The armature 33 is arranged along the height direction of the base 10 and located at the other end of the first yoke part 32a and the second yoke part 32b in the length direction of the base 10, one end of the armature 33 is overlapped on the corresponding end of the second yoke part 32b, and the other end of the armature 33 is opposite to the corresponding end of the first yoke part 32a. The push card 34 is located above the second yoke part 32b and arranged along the length direction of the base 10, one end of the push card 34 is connected with one end of the armature 33, and the other end of the push card 34 is connected with the moving reed 23 of the contact part 20, and the push card 34 can be driven to move along the length direction of the base 10. The moving reed 23 is driven to move by the armature 33 swinging to drive the push card 34, or the moving reed 23 is reset to drive the push card 34 to move to make the armature 33 swing back. In the figure, the action of the moving reed 23 can drive the moving contact 25 to close with one of the static contacts 22, and separate from the other static contact 22.

[0051] In the embodiment, the electromagnetic part 30 is arranged in the mounting groove 11 of the base 10, and the contact part 20 is arranged outside the mounting groove 11. The shell 40 is arranged with a baffle extending along the height direction of the base 10 on the side opposite to the base 10, and the baffle is arranged on the outer periphery of the side wall adjacent to the mounting groove 11 and the contact part 20. The contact part 20 is separated from the electromagnetic part 30 by cooperation of the mounting groove 11 and the baffle. The frame structure can increase the insulation creepage isolation between the electromagnetic part 30 and the contact part 20, and can strengthen the insulation performance between the coil and the contact.

[0052] The bottom of the shell 40 is opened to cover the outside of the base 10. The side opposite to the base 10 of the shell 40 is further arranged with a first accommodating groove 41 and a second accommodating groove 42 extending along the height direction of the base 10. The second plug-in end 21b of the static spring sheet 21 of the contact part 20 is correspondingly arranged in the first accommodating groove 41. The end of the dynamic spring lead-out sheet 24 away from the base 10 is arranged in the second accommodating groove 42. The size of the first accommodating groove 41 in the height direction of the base 10 corresponds to the size of the second plug-in end of the static spring sheet 21. The size of the second accommodating groove 42 in the height direction of the base 10 corresponds to the size of the corresponding end of the dynamic spring lead-out sheet 24. In the figure, two first accommodating grooves 41 are arranged to accommodate the second plug-in ends 21b of the corresponding two static spring sheets 21. The second accommodating groove 42 is arranged to accommodate the corresponding end of the corresponding dynamic spring lead-out sheet 24, so as to strengthen the insulation between the adjacent static spring sheets 21 and between the dynamic spring lead-out sheet 24 and the static spring sheet 21 in the contact part 20.

[0053] The relay of the utility model, when point the glue of static spring sheet 21 and dynamic spring sheet 23 and the shell 40 plug-in end, because of the action of first annular groove 21d and second annular groove 24a, can effectively block the glue to flow into the shell 40, in addition cooperate the recess 21c on static spring sheet 21, the mounting groove 11, first slot 12 and second slot 13 on base 10, the baffle on shell 40 etc., realize the insulation isolation of electromagnetic part 30 and contact part 20, and ensure the stable and reliable performance of contact part 20.

[0054] The relay of the utility model, under the conventional state, the dynamic contact 25 of dynamic spring sheet 23 contacts the static contact 22 of normally closed static spring sheet 21. When the coil assembly 31 is electrified, the electromagnetic attraction of first yoke part 32a drives armature 33 to attract, armature 33 drives push card 34 to pull dynamic spring sheet 23, so that the dynamic contact 25 is disconnected with the static contact 22 of normally closed static spring sheet 21, and connected with the static contact 22 of normally open static spring sheet 21. When the coil assembly 31 is de-energized, under the action of the reaction force of dynamic spring sheet 23, the dynamic contact 25 is disconnected with the static contact 22 of normally open static spring sheet 21, and connected with the static contact 22 of normally closed static spring sheet 21. Dynamic spring sheet 23 also drives push card 34 and armature 33 to reset to the conventional state.

[0055] In the utility model, for the terms "first", "second", "third" and the like are only used to distinguish similar objects, and do not have to be used to describe specific order or sequence, and also cannot be understood as indicating or suggesting relative importance. For the description, the orientation or position relationship indicated by "upper", "lower", "left", "right", "front" and "back" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and is not indicating or suggesting that the device must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the protection scope of the utility model. For ordinary skilled persons in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] In addition, in the description of the present application, "a plurality of" means two or more, unless otherwise specified. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents that the front and rear associated objects have an "or" relationship.

[0057] The above is only a specific embodiment of the utility model, but the design concept of the utility model is not limited thereto, and any non-essential change to the utility model using this concept shall be deemed to be an act of infringing the protection scope of the utility model.

Claims

1. An electromagnetic relay comprising a base, an electromagnetic part, a contact part and a housing; the electromagnetic part and the contact part are mounted on the base, the housing is arranged outside the base and surrounds the electromagnetic part and the contact part; the contact part comprises a static spring piece, the static spring piece extends along the height direction of the base and one end of the static spring piece is provided with a first plug-in end passing through the base, the other end of the static spring piece is provided with a second plug-in end passing through the housing, and a static contact is arranged between the first plug-in end and the second plug-in end, characterized in that: The static spring sheet is provided with a first ring groove on the second plug-in end, the ring groove is formed on the second plug-in end which is plugged into the shell to block the glue flowing into the shell along the second plug-in end, the upper surface of the static spring sheet opposite to the side wall of the shell along the length direction of the base is further provided with a recess, the static contact is located on the recess and has a space with the opposite side wall of the shell. ​ 2. An electromagnetic relay according to claim 1, characterized in that: The base is provided with a first insertion slot for the first plug-in end to insert and pass through; the shell is provided with a first insertion hole for the second plug-in end to insert and pass through; the first ring groove is close to the inner side of the first insertion hole opposite to the base.

3. An electromagnetic relay as claimed in claim 1, characterized in that: The first ring groove extends along the circumference of the second plug-in end and is concave along the radial direction of the second plug-in end.

4. An electromagnetic relay as claimed in claim 2, characterized in that: The contact part is provided with at least two static spring sheets, the base is correspondingly provided with at least two first insertion slots for the first plug-in end of the corresponding static spring sheet to insert, the first insertion slot extends along the height direction of the base, and an empty slot is formed between two adjacent first insertion slots; the moving contact of the contact part is located above the empty slot.

5. An electromagnetic relay as claimed in claim 1, characterized in that: The base is provided with a second insertion slot, and the shell is provided with a second insertion hole; the contact part is further provided with a moving spring sheet and a moving spring lead-out sheet, the moving spring sheet is connected with the moving spring lead-out sheet, one end of the moving spring lead-out sheet passes through the second insertion slot, and the other end of the moving spring lead-out sheet passes through the second insertion hole and is provided with a second ring groove; the second ring groove is close to the inner side of the second insertion hole opposite to the base to block the glue flowing into the shell along the moving spring lead-out sheet.

6. An electromagnetic relay according to claim 5, wherein: The second ring groove extends along the circumference of the moving spring lead-out sheet and is concave along the radial direction of the moving spring lead-out sheet.

7. An electromagnetic relay as claimed in claim 4, characterized in that: The static spring sheet is provided with a bending part close to the moving contact on the first plug-in end or the second plug-in end, and the recess is concave on the surface of the bending part opposite to the side wall of the shell.

8. An electromagnetic relay as claimed in claim 1, characterized in that: The electromagnetic part includes a coil assembly, a yoke, an armature and a push card; the yoke includes a first yoke part and a second yoke part extending along the length direction of the base, the first yoke part is arranged in the coil assembly, and one end of the first yoke part and the second yoke part is connected; the armature is arranged along the height direction of the base and located at the other end of the first yoke part and the second yoke part, and one end of the armature is overlapped on the corresponding end of the second yoke part; the push card is arranged along the length direction of the base, one end of the push card is connected with one end of the armature, and the other end of the push card is connected with the moving spring sheet of the contact part; the moving spring sheet is driven to move by the armature swinging.

9. An electromagnetic relay as claimed in claim 1, characterized in that: The base is provided with a mounting slot, the electromagnetic part is located in the mounting slot, and the contact part is located outside the mounting slot; the shell is provided with a baffle extending along the height direction of the base on the side opposite to the base, and the baffle is located on the outer periphery of the side wall adjacent to the mounting slot and the contact part.

10. An electromagnetic relay as claimed in claim 1, characterized in that: The side of the shell opposite to the base is further provided with a first accommodating groove and a second accommodating groove extending along the height direction of the base; the second plug-in end of the static spring sheet is arranged in the first accommodating groove; and the end of the dynamic spring lead-out sheet of the contact part away from the base is arranged in the second accommodating groove.

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