Miniature relay

Abstract

A miniature relay comprises a base, a movable and static spring part, a magnetic circuit part and a shell. The base is provided with an installation cavity, the magnetic circuit part is located in the installation cavity, the movable and static spring part is located outside one side of the installation cavity, and the shell covers the base. The movable and static spring part comprises at least one 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, and a mounting part which extends along the length direction of the base relative to the first plugging end and the second plugging end is arranged between the first plugging end and the second plugging end; a static contact is arranged on the mounting part; a groove is further formed in the mounting part of the static reed opposite to the side wall of the base of the shell in the length direction, the groove is located in the side, opposite to the side wall of the shell, of the mounting part, and the static contact is located at the groove and is spaced from the opposite side wall of the shell. According to the utility model, the components of the relay are reasonably arranged, so that the components are compactly arranged, and the performance of the contact part is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of relay, especially a small relay. BACKGROUND

[0002] The push rod type super small relay is composed of a base, a magnetic circuit part arranged on the base, a push card and a contact part. The contact part includes a moving spring assembly and a static spring assembly. The moving spring assembly includes a moving spring provided with a moving contact, and the static spring assembly includes a static spring provided with a static contact. The magnetic circuit part includes a coil holder, an iron core, a yoke and an armature. When the coil is powered, the iron core generates electromagnetic attraction to drive the armature to swing, and then drives the push card to push the moving spring, so that the moving contact on the moving spring and the static contact on the static spring are closed / opened. When the coil is powered off or the exciting current is reduced to a certain value, the counter torque of the moving spring is greater than the electromagnetic attraction torque, the moving spring returns to the original state, and the moving contact on the moving spring and the static contact on the static spring are disconnected / closed.

[0003] However, as the use scenarios of the relay are more and more, the requirements for various parameters of the relay are also higher. The relay is required to have a small size, but the reduction in size means that the space in 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. When assembled, the static contact of the static spring close to the inner wall of the shell will scratch the shell to produce contact plastic debris, affecting the performance of the contact part. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the utility model is to overcome the above-mentioned defects in the prior art, and propose a small relay. The various components of the relay are reasonably arranged to ensure that the components are arranged compactly and do not affect the performance of the contact part.

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

[0006] A small relay includes a base, a moving and static spring part, a magnetic circuit part and a shell; the base is provided with a mounting cavity, the magnetic circuit part is located in the mounting cavity, the moving and static spring part is located outside one side of the mounting cavity, and the shell is covered on the base; the moving and static spring part includes at least one static spring sheet, the static spring sheet extends along the height direction of the base, one end of the static spring sheet is provided with a first plug-in end penetrating through the base, the other end is provided with a second plug-in end penetrating through the shell, the first plug-in end and the second plug-in end are provided with a mounting part extending along the length direction of the base relative to the first plug-in end and the second plug-in end, and the mounting part is provided with a static contact; the mounting part of the static spring sheet opposite to the side wall of the base in the length direction of the base is further provided with a groove, the groove is located on the side of the mounting part opposite to the side wall of the shell, and the static contact is located at the groove and has a spacing with the side wall of the shell opposite to the static contact.

[0007] The mounting part with the groove extends away from the corresponding side of the shell along the length direction of the base, and the groove is concave on the surface of the mounting part opposite to the side wall of the shell.

[0008] The magnetic circuit 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 penetrates through the coil assembly, and one end of the first yoke part is connected with the second yoke part; 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, 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 a moving spring sheet of the moving and static spring part; the armature is swung to drive the push card to move and drive the moving spring sheet to act.

[0009] The coil assembly is further provided with a framework, the framework is provided with a through hole for the first yoke part to penetrate through; one side of the framework opposite to the armature is provided with a mounting groove and a supporting sheet, the armature and the opposite end of the first yoke part are located in the mounting groove; the supporting sheet is mounted on the side of the mounting groove away from the second yoke part to support the armature.

[0010] The mounting groove includes two side walls arranged at intervals along the width direction of the base, one side of the side wall close to the second yoke part is provided with a limiting groove, and the limiting groove extends along the height direction of the base; the armature is provided with two clamping grooves on both sides in the width direction of the base, and the two clamping grooves oppositely extend along the width direction of the base and are located at the two limiting grooves respectively.

[0011] At least one first slot is arranged at the position of the moving and static spring part of the base, the first slot penetrates in the height direction of the base, and a side of the first slot is provided with a hollow slot; the first insertion end of the static spring sheet is inserted and penetrates through the corresponding first slot; and the moving contact of the moving and static spring part is located above the hollow slot.

[0012] The height of the side wall of the mounting cavity is greater than the height of the side wall of the first slot.

[0013] The second slot is further arranged outside the mounting cavity on the base, and the second slot is located on the side away from the second slot in the width direction of the base; the moving and static spring part is provided with a moving spring sheet and a moving spring lead-out sheet, the moving spring lead-out sheet is inserted and penetrates through the second slot; one end of the moving spring sheet is connected with the moving spring lead-out sheet, and the other end of the moving spring sheet extends to above the hollow slot in the width direction of the base and is provided with the moving contact.

[0014] The side away from the base of the shell is further provided with at least one first accommodating slot and a second accommodating slot extending in the height direction of the base; the second insertion end of the static spring sheet of the moving and static spring part is correspondingly arranged in the first accommodating slot; and the end away from the base of the moving spring lead-out sheet is arranged in the second accommodating slot.

[0015] As can be seen from the above description of the utility model, compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The relay of the utility model, the mounting cavity is arranged to separate the magnetic circuit part and the moving and static spring part, realize the insulation creepage isolation of the frame type moving and static spring part and the magnetic circuit part, recesses are arranged on the mounting part of the static spring sheet opposite to the side wall of the shell, the interval between the riveted static contact and the side wall of the shell is ensured, the static contact is prevented from being scratched during the assembly of the shell, and the contact performance of the moving and static spring part is reliable.

[0017] 2. The relay of the utility model, the magnetic circuit part comprises a coil assembly, a yoke, an armature and a push card; the yoke comprises a first yoke and a second yoke, the first yoke penetrates the coil assembly, the armature is connected with the push card by being lapped on the second yoke, the movement of the push card is driven by the swing of the armature to drive the moving spring sheet to move, and the push rod type structure is adopted, so that the magnetic circuit part is compact in structure and the overall volume is reduced.

[0018] 3. The relay of the utility model, the installation slot and the supporting sheet are arranged on the side of the skeleton opposite to the armature, the corresponding end of the armature is located in the installation slot; the supporting sheet is installed in the installation slot to support the armature; the side wall of the installation slot is provided with a limiting slot, the armature is provided with a clamping slot, and the swing of the armature is limited by the clamping slot located between the two limiting slots.

[0019] 4. The relay of the utility model, first slot and second slot are established on base, first plug-in end of static spring sheet is inserted and passes through first slot, dynamic spring lead-out sheet is inserted and passes through second slot, empty slot is established between two first slots, namely, it is more stable to ensure that static spring sheet and dynamic spring lead-out sheet are connected with base, and insulating creepage distance is increased.

[0020] 5. The relay of the utility model, first accommodating groove and second accommodating groove are further established on base, and are respectively used for accommodating second plug-in end of static spring sheet and corresponding end of dynamic spring lead-out sheet, and are used for strengthening insulation between adjacent static spring sheets of dynamic spring part, between dynamic spring sheet and static spring lead-out sheet. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is overall view of the utility model;

[0022] Figure 2 It is front view of the utility model; Figure 1

[0023] Figure 3 It is exploded view of the utility model; Figure 1

[0024] Figure 4 It is main part layout of the utility model Figure 1 ;

[0025] Figure 5 It is main part layout of the utility model Figure 2 ;

[0026] Figure 6 It is static spring sheet structure diagram;

[0027] Figure 7 It is side view of the utility model; Figure 6

[0028] Figure 8 It is front view of the utility model; Figure 6

[0029] It is structure diagram of base; Figure 9

[0030] It is armature and framework cooperation diagram; Figure 10

[0031] It is sectional view of the utility model; Figure 11 Figure 1 Among them:

[0032]

[0033] ​​​​​10, base; 11, mounting cavity; 12, first slot; 13, second slot; 14, empty slot; 15, recess; 20, moving and static spring part; 21, static spring leaf; 21a, first insertion end; 21b, second insertion end; 21c, mounting portion; 21d, recess; 22, static contact; 22a, contact rod; 23, moving spring leaf; 24, moving spring lead-out leaf; 25, moving contact; 30, magnetic circuit part; 31, coil assembly; 31a, skeleton; 31b, mounting slot; 31c, support leaf; 31d, limiting slot; 32, yoke; 32a, first yoke portion; 32b, second yoke portion; 32c, protruding portion; 33, armature; 33a, clamping slot; 34, pushing clasp; 40, housing; 41, first accommodating slot; 42, second accommodating slot.

[0034] The utility model will be further described below in combination with the drawings and specific embodiments. Specific embodiments

[0035] The utility model will be further described below in combination with the drawings and specific embodiments.

[0036] Reference Figures 1 to 11 A small-sized relay includes a base 10, a moving and static spring part 20, a magnetic circuit part 30, and a housing 40. The base 10 is provided with a mounting cavity 11, the top of the mounting cavity 11 is open, and the magnetic circuit part 30 is located in the mounting cavity 11. The moving and static spring part 20 is located outside one side of the mounting cavity 11, the magnetic circuit part 30 and the moving and static spring part 20 can be distributed along the length direction of the base 10, and the moving and static spring part 20 is close to one side edge of the length direction of the base 10. The housing 40 is covered outside the base 10, and the housing 40 encloses the mounting cavity 11, that is, the base 10, the moving and static spring part 20, and the magnetic circuit part 30 are enclosed in the mounting cavity 11.

[0037] The dynamic and static spring part 20 comprises at least one static spring sheet 21, which extends along the height direction of the base 10 and has a first insertion end 21a penetrating through the base 10 and partially exposed outside the base 10. The other end of the static spring sheet 21 has a second insertion end 21b penetrating through the shell 40. The first insertion end 21a and the second insertion end 21b are provided with a mounting portion 21c extending along the length direction of the base 10, and the static contact 22 is riveted on the mounting portion 21c. The dynamic and static spring part 20 can be provided with one static spring sheet 21 or two static spring sheets 21 or more. In the drawings, two static spring sheets 21 are taken as an example, which are spaced apart along the length direction of the base 10. In the length direction of the base 10, one static spring sheet 21 is close to the mounting cavity 11 and can serve as a normally open contact; the other static spring sheet 21 is away from the mounting cavity 11 and close to the side wall of the shell 40 and can serve as a normally closed contact. The extension directions of the two mounting portions 21c of the two static spring sheets 21 can be the same or different. In the drawings, the extension directions of the two mounting portions 21c are opposite and extend towards each other, and the two static contacts 22 are oppositely arranged.

[0038] Further, the mounting portion 21c of the static spring sheet 21 opposite to the side wall of the shell 40 in the length direction of the base 10 is further provided with a groove 21d. The groove 21d is located on the side of the mounting portion 21c opposite to the side wall of the shell 40, the contact rod 22a of the static contact 22 penetrates through the groove 21d, and the contact rod 22a has a space with the opposite side wall of the shell 40. The mounting portion 21c with the groove 21d extends away from the corresponding side of the shell 40 along the length direction of the base 10. The groove 21d is concave on the surface of the mounting portion 21c opposite to the side wall of the shell 40. The size of the groove 21d is larger than that of the contact rod 22a. By designing the stamping groove on the mounting portion 21c of the static spring sheet 21, the surface of the contact rod 22a of the static contact 22 is concave relative to the corresponding surface of the mounting portion 21c and does not protrude beyond the surface of the static spring sheet 21, thereby avoiding scratching the contact rod 22a of the static contact 22 during assembly of the shell 40.

[0039] The dynamic and static spring part 20 is further provided with a dynamic spring sheet 23 and a dynamic spring lead-out sheet 24. The dynamic spring lead-out sheet 24 is arranged outside the mounting cavity 11 and on the side of the base 10 away from the static spring sheet 21 in the width direction of the base 10. The dynamic spring lead-out sheet 24 extends along the height direction of the base 10 and has one end penetrating through the base 10. The dynamic spring sheet 23 has one end fixedly connected with the dynamic spring lead-out sheet 24 and the other end extending along the width direction of the base 10 to be opposite to the static spring sheet 21. The dynamic spring sheet 23 is provided with a dynamic contact 25 opposite to the static contact 22. In the drawings, the dynamic contact 25 is opposite to and located between the two static contacts 22. The dynamic contact 25, the dynamic spring lead-out sheet 24 and the dynamic spring sheet 23 are connected by riveting.

[0040] In this invention, the magnetic circuit portion 30 includes a coil assembly 31, a yoke 32, an armature 33, and a pusher 34. The coil assembly 31 is arranged along the length of the base 10. The yoke 32 includes a first yoke portion 32a and a second yoke portion 32b extending along the length of the base 10. The first yoke portion 32a passes through the coil assembly 31 as a core, and the first yoke portion 32a and the second yoke portion 32b are connected at one end along the length of the base 10. The second yoke portion 32b has protrusions 32c on both sides in the width direction of the base 10. The mounting cavity 11 has recesses 15 on the top of the two side walls in the width direction of the base 10. The two protrusions 32c of the second yoke portion 32b are respectively embedded in the two recesses 15 to position the second yoke portion 32b. The armature 33 is arranged along the height direction of the base 10 and is located at the other end of the first yoke portion 32a and the second yoke portion 32b. One end of the armature 33 is attached to the corresponding end of the second yoke 32b, and the other end of the armature 33 is opposite to the corresponding end of the first yoke 32a. A pusher 34 is located above the second yoke 32b and is arranged along the length of the base 10. One end of the pusher 34 is connected to one end of the armature 33, and the other end of the pusher 34 is connected to the moving spring 23 of the moving and stationary spring section 20. The pusher 34 can be driven to move along the length of the base 10. The armature 33 swings, causing the pusher 34 to move and thus the moving spring 23 to move; or the moving spring 23 returns to its original position, causing the pusher 34 to move and the armature 33 to swing back to its original position. In the figure, the movement of the moving spring 23 can cause the moving contact 25 to close with one of the stationary contacts 22 and separate from the other stationary contact 22.

[0041] Furthermore, the coil assembly 31 is also provided with a frame 31a, which has a through hole for the first yoke portion 32a to pass through, and a coil is wound around the outer periphery of the frame 31a. A mounting groove 31b and a support plate 31c are provided on the side of the frame 31a opposite to the armature 33. The end of the armature 33 opposite to the first yoke portion 32a is located within the mounting groove 31b, and a space is formed between the mounting groove 31b and the opposite sidewall of the mounting cavity 11 to accommodate the swinging of the armature 33. The support plate 31c is installed on the side of the mounting groove 31b away from the second yoke portion 32b to support the armature 33.

[0042] The mounting groove 31b includes two sidewalls spaced apart along the width direction of the base 10. A limiting groove 31d is provided on the side of the sidewall closest to the second yoke 32b, extending along the height direction of the base 10. The armature 33 has two locking slots 33a on each side of the base 10 in the width direction. These two slots 33a extend opposite each other along the width direction of the base 10 and are located at the two limiting grooves 31d. The space between the mounting groove 31b and the opposite sidewall of the mounting cavity 11, along with the cooperation of the locking slots 33a and the limiting grooves 31d, limits the swing of the armature 33, ensuring more reliable and accurate swing of the armature 33.

[0043] In this embodiment, at least one first slot 12 is provided at the location of the stationary and moving spring portions 20 of the base 10. The first slot 12 extends through the height of the base 10, and a slot 14 is provided on the outer side of the first slot 12. The first insertion end 21a of the stationary spring 21 is inserted into and passes through the corresponding first slot 12 to ensure the stability of the insertion of the stationary spring 21. The stationary contact 22 is located above the first slot 12. In the figure, two first slots 12 are used as an example. The two first slots 12 are spaced apart, and the slot 14 is located between the two adjacent first slots 12. The first insertion ends 21a of the two stationary springs 21 are respectively inserted into and pass through the corresponding first slots 12. The moving contact 25 of the stationary and moving spring portions 20 is located above the slot 14. By providing slots for the stationary springs 21 to pass through on the base 10 and providing slots 14 between the slots, the insulation creepage distance can be increased.

[0044] A second slot 13 is also provided outside the mounting cavity 11 on the base 10. The second slot 13 is located on the side of the base 10 away from the second slot 13 in the width direction. The moving spring lead-out piece 24 of the moving and stationary spring portion 20 is inserted into and passes through the second slot 13. The height of the side wall of the mounting cavity 11 is greater than the height of the side wall of the first slot 12. This frame structure of the mounting cavity 11 can increase the insulation and creepage isolation between the magnetic circuit portion 30 and the contact portion, and enhance the insulation performance between the coil and the contact.

[0045] The bottom opening of the outer casing 40 covers the base 10. At least one first receiving groove 41 and a second receiving groove 42 extending along the height direction of the base 10 are provided on the side of the outer casing 40 away from the base 10. The second insertion ends 21b of the stationary spring pieces 21 of the stationary spring portion 20 are correspondingly inserted into the first receiving groove 41. The end of the moving spring lead-out piece 24 away from the base 10 is inserted into the second receiving groove. The dimension of the first receiving groove 41 in the height direction of the base 10 corresponds to the dimension of the second insertion 21d of the stationary spring piece 21, and the dimension of the second receiving groove in the height direction of the base 10 corresponds to the dimension of the corresponding end of the moving spring lead-out piece 24. In the figure, two first receiving grooves 41 are provided to accommodate the second insertion ends 21b of the corresponding two stationary spring pieces 21, and a second receiving groove 42 is provided to accommodate the corresponding end of the corresponding moving spring lead-out piece 24, to strengthen the insulation between adjacent stationary spring pieces 21 and between the moving spring lead-out piece 24 and the stationary spring piece 21 in the stationary spring portion 20.

[0046] The relay of this utility model is, Figure 10For example, under normal conditions, the moving contact 25 of the moving spring 23 is in contact with the stationary contact 22 of the normally closed stationary spring 21. When the coil assembly 31 is energized, the first yoke 32a generates an electromagnetic attraction force that drives the armature 33 to engage. The armature 33 drives the pusher 34 to pull the moving spring 23, causing the moving contact 25 to disconnect from the normally closed stationary contact 22 of the stationary spring 21 and connect with the normally open stationary contact 22 of the stationary spring 21. When the coil assembly 31 is de-energized, under the reaction force of the moving spring 23, the moving contact 25 disconnects from the normally open stationary contact 22 of the stationary spring 21 and closes with the normally closed stationary contact 22 of the stationary spring 21. The moving spring 23 also drives the pusher 34 and the armature 33 to return to the normal state.

[0047] In this utility model, the terms "first," "second," and "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "left," "right," "front," and "rear" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model, and does not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0049] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A miniature relay, comprising a base, a moving and stationary spring portion, a magnetic circuit portion, and a housing; characterized in that: The base has a mounting cavity, the magnetic circuit portion is located in the mounting cavity, the dynamic and static spring portion is located outside one side of the mounting cavity, and the outer shell covers the base; the dynamic and static spring portion includes at least one static spring plate, the static spring plate extends along the height direction of the base and has a first insertion end through the base at one end and a second insertion end through the outer shell at the other end, a mounting portion is provided between the first insertion end and the second insertion end, extending along the length direction of the base relative to the first insertion end and the second insertion end, and a static contact is provided on the mounting portion; a groove is also provided on the mounting portion of the static spring plate opposite to the side wall of the outer shell in the length direction of the base, the groove is located on the side of the mounting portion opposite to the side wall of the outer shell, and the static contact is located at the groove and is spaced apart from the opposite side wall of the outer shell.

2. A miniature relay as described in claim 1, characterized in that: The mounting portion having the groove extends along the length direction of the base away from the corresponding side of the housing, and the groove is recessed into the surface of the mounting portion opposite to the side wall of the housing.

3. A miniature relay as described in claim 1, characterized in that: The magnetic circuit includes a coil assembly, a yoke, an armature, and a pusher; the yoke includes a first yoke portion and a second yoke portion extending along the length direction of the base, the first yoke portion passing through the coil assembly, and one end of the first yoke portion and the second yoke portion being connected; the armature is arranged along the height direction of the base and located at the other end of the first yoke portion and the second yoke portion, one end of the armature overlapping the corresponding end of the second yoke portion; the pusher is arranged along the length direction of the base and one end of it is connected to one end of the armature, the other end of the pusher is connected to the moving spring of the moving and stationary spring portion; the armature swings to drive the pusher to move, thereby driving the moving spring to actuate.

4. A miniature relay as described in claim 3, characterized in that: The coil assembly is further provided with a frame, the frame having a through hole for the first yoke portion to pass through; the frame having a mounting groove and a support plate on the side opposite to the armature, the end of the armature opposite to the first yoke portion being located in the mounting groove; the support plate being installed on the side of the mounting groove away from the second yoke portion to support the armature.

5. A miniature relay as described in claim 4, characterized in that: The mounting groove includes two sidewalls spaced apart along the width direction of the base. A limiting groove is provided on the side of the sidewall near the second yoke portion, and the limiting groove extends along the height direction of the base. The armature is provided with two slots on both sides of the base in the width direction. The two slots extend opposite to each other along the width direction of the base and are located at the two limiting grooves respectively.

6. A miniature relay as described in claim 1, characterized in that: At least one first slot is provided at the location of the moving and stationary spring portions of the base. The first slot extends through the height direction of the base and has a hollow groove on its side. The first insertion end of the stationary spring is inserted into and passes through the corresponding first slot. The moving contact of the moving and stationary spring portions is located above the hollow groove.

7. A miniature relay as described in claim 6, characterized in that: The height of the sidewall of the mounting cavity is greater than the height of the sidewall of the first slot.

8. A miniature relay as described in claim 6, characterized in that: A second slot is also provided outside the mounting cavity on the base. The second slot is located on the side of the base away from the second slot in the width direction. The moving and stationary spring portion is provided with a moving spring plate and a moving spring lead plate. The moving spring lead plate is inserted into and passes through the second slot. One end of the moving spring plate is connected to the moving spring lead plate, and the other end of the moving spring plate extends along the width direction of the base to the top of the empty slot and is provided with the moving contact.

9. A miniature relay as described in claim 8, characterized in that: The outer casing is provided with at least one first receiving groove and a second receiving groove extending along the height direction of the base on the side away from the base; the second insertion end of the stationary spring sheet of the moving and stationary spring portion is inserted into the first receiving groove in a corresponding manner; the end of the moving spring lead-out sheet away from the base is inserted into the second receiving groove.

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