Magnetic circuit structure for magnetic isolation of coil holder and relay

Abstract

The utility model provides a coil holder magnetic isolation magnetic circuit structure and a relay, the coil holder magnetic isolation magnetic circuit structure comprises a coil holder, yokes and an iron core which are assembled in the coil holder, and a coil arranged on the outer ring of the coil holder, the number of the yokes is two, the yokes are oppositely arranged left and right, and the iron core is located between the two yokes. The iron core is provided with a head part for connecting the pushing card and a tail part deviating from the head part; the two side walls, corresponding to the tail position of the iron core, of the coil holder extend inwards to form limiting protruding parts, the shortest distance between the limiting protruding parts on the two sides is larger than the thickness of the iron core, and the limiting protruding parts on the two sides jointly limit displacement of the iron core in the left-right direction so that the iron core can keep a distance from the two yokes all the time. The coil holder integrates the winding function and the magnetic isolation function, the overall structure is simplified, the overall cost is low, and assembling is easy and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to relay field, concretely relates to a line frame magnetic path structure and relay. BACKGROUND

[0002] The relay is the automatic switch commonly used in various circuits, and the relay is mainly composed of a magnetic circuit part and a contact part. In the existing magnetic circuit part, the magnetic separation of the armature (i.e. the core) and the yoke is realized by adding a component capable of magnetic separation (such as a magnetic separation sheet). As shown in the disclosure documents such as CN102208305B and CN214175940U. This results in higher cost and more complicated assembly. SUMMARY

[0003] Therefore, the utility model provides a line frame magnetic path structure and relay to improve the above problems.

[0004] To achieve the above purpose, the utility model provides the technical scheme as follows:

[0005] A line frame magnetic path structure, comprising a line frame, a yoke and an iron core assembled in the line frame, and a coil arranged on the outer circle of the line frame, the yoke is provided with two and is arranged opposite left and right, the iron core is located between the two yokes, the iron core has a head for connecting a push card and a tail away from the head; the line frame extends inward to form a limiting protrusion on both sides of the tail position corresponding to the iron core, the shortest distance between the two limiting protrusions is greater than the thickness of the tail of the iron core, and the two limiting protrusions jointly limit the displacement of the iron core in the left-right direction, so that the iron core and the two yokes always maintain a distance.

[0006] Further, a front-rear limiting structure is arranged between the iron core and the two yokes to limit the displacement of the iron core in the front-rear direction.

[0007] Further, the front-rear limiting structure is arranged at the tail position corresponding to the iron core, and is closer to the tail end face than the limiting protrusion.

[0008] Further, the front-rear limiting structure comprises a concave part formed on at least one side of the iron core and a convex part arranged on at least one yoke, and the convex part of the yoke extends into the concave part of the iron core and is spaced apart from the inner wall of the concave part.

[0009] Further, the front-rear limiting structure comprises a convex part formed on at least one side of the iron core and a concave part arranged on at least one yoke, and the convex part of the iron core extends into the concave part on the yoke and is spaced apart from the inner wall of the concave part.

[0010] Further, the convex part and the yoke are integrally connected, or the convex part is made of non-magnetic material and is assembled and fixed on the yoke.

[0011] Further, the convex cover is a spherical arc convex cover, and the inner wall of the concave part is a circular arc inner wall.

[0012] Further, the iron core further has a middle section between the head and the tail, and the thickness of the middle section is less than the thickness of the head and the tail.

[0013] Further, the two yoke irons are in U-shaped structures, each including a horizontal part and first and second vertical parts connected to two ends of the horizontal part, the first vertical parts of the two yoke irons correspond to and are located on the left and right sides of the tail of the iron core, and the second vertical parts of the two yoke irons correspond to and are located on the left and right sides of the head of the iron core.

[0014] Further, at the tail position, accommodating grooves are further arranged on the two side walls of the bobbin, and the first vertical parts of the two yoke irons are respectively assembled in the two accommodating grooves; at the head position, positioning steps are further formed on the two side walls of the bobbin, and the second vertical parts of the two yoke irons are respectively assembled on the two positioning steps.

[0015] A relay at least includes the magnetic circuit structure of the bobbin magnetic separation described above.

[0016] The technical scheme has the following beneficial effects:

[0017] The limit convex parts are designed on the original bobbin, and the shortest distance between the two limit convex parts is greater than the thickness of the iron core, so that the action of the iron core is not affected, and the distance between the iron core and the two yoke irons is ensured, so that the gap magnetic separation effect is realized. The bobbin integrates the winding and the magnetic separation functions, simplifies the overall structure, and is low in overall cost and easy to assemble. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 shows the appearance of the magnetic circuit structure of the bobbin magnetic separation in the embodiment; Figure 1

[0019] Figure 2 Fig. 2 shows the appearance of the magnetic circuit structure of the bobbin magnetic separation in the embodiment; Figure 2

[0020] Figure 3 Fig. 3 shows the sectional view of A-A line in the embodiment; Figure 2

[0021] Figure 4 Fig. 4 shows the enlarged schematic view of C area in the embodiment; Figure 3

[0022] Figure 5 Fig. 5 shows the appearance of the relay in the embodiment; Figure 1

[0023] Figure 6 ​​​​​The image shown is a schematic diagram of the appearance of the relay in the embodiment. Figure 2 ;

[0024] Figure 7 As shown Figure 6 Sectional view of the middle BB line;

[0025] Figure 8 The diagram shown is a schematic representation of the wire frame structure in the embodiment. Detailed Implementation

[0026] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figures 1 to 4 As shown, this embodiment provides a magnetic circuit structure with a wire frame for magnetic isolation, including a wire frame 10, a yoke 20 and an iron core 30 assembled within the wire frame 10, and a coil 40 disposed on the outer ring of the wire frame 10. Two yokes 20 are provided and arranged opposite each other, and the iron core 30 is located between the two yokes 20. The iron core 30 has a head 31 for connecting to a push card and a tail 32 facing away from the head 31, as shown... Figure 7 The head 31 of the iron core 30 shown is connected to the push card 50; the wire frame 10 extends inward on both sides of the side wall 11 corresponding to the tail 32 of the iron core 30 to form limiting protrusions 12. The shortest distance between the two limiting protrusions 12 is greater than the thickness of the tail 32 of the iron core, and the two limiting protrusions 12 together restrict the displacement of the iron core 30 in the left and right directions so that the iron core 30 and the two yokes 20 always maintain a distance.

[0029] like Figure 3 , Figure 4 As shown, there is a gap between the tail 32 of the iron core 30 and the limiting protrusion 12. This gap ensures that the wire frame 10 does not affect the normal operation of the iron core 30; it also effectively limits the excessive displacement of the iron core 30 in the left and right directions, ensuring that the iron core 30 and the two yokes 20 always maintain a distance, thereby achieving the gap magnetic isolation effect. The wire frame 10 integrates winding and magnetic isolation functions, simplifying the overall structure, resulting in lower overall cost and easier assembly.

[0030] Specifically, in the embodiment, the two yokes 20 are in U-shaped structure, including a horizontal portion (not shown) and a first vertical portion 21 and a second vertical portion 22 connected at both ends of the horizontal portion, the first vertical portions 21 of the two yokes 20 correspond to and are located on the left and right sides of the tail portion 32 of the core 30, and the second vertical portions 22 of the two yokes 20 correspond to and are located on the left and right sides of the head portion 31 of the core 30. More specifically, as shown in Figure 3 , Figure 4 the limiting protrusion 12 of the wire holder 10 is located between the first vertical portion 21 and the second vertical portion 22 of the yoke 20 and is close to the first vertical portion 21.

[0031] In order to facilitate the positioning and installation of the yoke 20, in the tail portion position (referring to the position of the tail portion 32 of the core 30), continuing to refer to Figure 8 , the two side walls 11 of the wire holder 10 are also provided with accommodating grooves 13, and the first vertical portions 21 of the two yokes 20 are respectively fitted in the two accommodating grooves 13. At the same time, in the head portion position (referring to the position of the head portion 31 of the core 30), the two side walls 11 of the wire holder 10 are also formed with positioning steps 14, and the second vertical portions 22 of the two yokes 20 are respectively fitted on the two positioning steps 14.

[0032] The core 30 also has a middle segment 33 located between the head portion 31 and the tail portion 32, and the thickness of the middle segment 33 is smaller than the thickness of the head portion 31 and the tail portion 32; that is, the middle segment 33 of the core 30 is thinned to facilitate assembly and accommodation, and the assembly operation of the core 30 is facilitated.

[0033] The front and rear limiting structures are arranged between the core 30 and the two yokes 20 to limit the displacement of the core 30 in the front and rear directions.

[0034] Further, the front and rear limiting structures are arranged at the position corresponding to the tail portion 32 of the core 30 and are closer to the end face of the tail portion 32 than the limiting protrusion 12. In the embodiment, the front and rear limiting structures include recesses 34 formed on the left and right sides of the core 30 and protrusions 23 arranged on the two yokes 20. Specifically, the recesses 34 are arranged on the left and right sides of the tail portion 32 of the core 30, and the protrusions 23 are respectively arranged on the first vertical portions 21 of the two yokes 20; the two protrusions 23 respectively extend into the recesses 34 on the left and right sides of the core 30 and are spaced apart from the inner walls of the recesses 34.

[0035] Since the limiting protrusion 12 of the frame 10 limits the shift of the core 30 in the left-right direction, the inner wall of the recess 34 of the core 30 is always kept apart from the protrusion 23; meanwhile, if the core 30 shifts in the front-back direction, the protrusion 23 will abut against the inner wall of the recess 34 of the core 30 to limit the shift, preventing the core 30 from excessively shifting in the front-back direction.

[0036] Further, the protrusion 23 is integrally connected with the yoke 20, i.e. the protrusion 23 is integrally punched from the first vertical part 21 of the yoke 20; meanwhile, in order to ensure that the core 30 can normally operate when it shifts to a certain extent (i.e. when the protrusion 23 contacts the inner wall of the recess 34), in the embodiment, the protrusion 23 is a spherical protrusion, and the inner wall of the recess 34 of the core 30 is a circular inner wall; when the core 30 shifts in the front-back direction, the protrusion 23 contacts the inner wall of the recess 34 at a point. The point contact makes the magnetic resistance between the core 30 and the yoke 20 large, and when the coil 40 drives, the core 30 can also normally operate.

[0037] Of course, in other embodiments, the protrusion 23 can also be made of a non-magnetic material, i.e. the protrusion 23 made of a non-magnetic material is fixed on the first vertical part 21 of the yoke 20 by assembly; in this way, even if the protrusion 23 forms a large-area contact with the inner wall of the recess 34, the magnetic isolation effect can also be ensured.

[0038] The cooperation of the protrusion 23 and the recess 34 can simplify the structure, and no additional parts for limiting are needed, thus reducing the length of the overall relay.

[0039] The above-mentioned magnetic circuit structure of the frame magnetic isolation is one of the more preferred embodiment modes in the scheme, of course, in other embodiments, it is not limited thereto, for example, the positions of the protrusion 23 and the recess 34 can be interchanged, i.e. the protrusion 23 is arranged on the core 30, and the recess 34 is arranged on the yoke 20; or the number of the cooperation of the protrusion 23 and the recess 34 is one, i.e. one of the yokes 20 and the core 30 forms the cooperation structure of the protrusion 23 and the recess 34, and the other side of the core 30 and the other yoke 20 are flat surfaces; in this case, the depth of the recess 34 and the protrusion 23 can be deepened to achieve the limiting effect; or the front-back limiting structure can also adopt a limiting step and the like.

[0040] Continuing to refer to Figures 5 to 7 the embodiment also provides a relay, which at least comprises the above-mentioned magnetic circuit structure of the frame magnetic isolation.

[0041] As Figure 7 shown in the embodiment, the first part 31 of the core 30 is connected with the push card 50, and the push card 50 is connected with the moving spring 60 of the contact part.

[0042] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all of them are within the protection scope of the utility model.

Claims

1. A magnetic circuit structure for magnetic isolation of a wire frame, comprising a wire frame, a yoke and an iron core assembled within the wire frame, and a coil disposed on the outer ring of the wire frame, wherein two yokes are disposed opposite each other, and the iron core is located between the two yokes, the iron core having a head for connecting a push card and a tail opposite to the head; characterized in that: The wire frame extends inward on both sides of the tail position of the corresponding iron core to form limiting protrusions. The shortest distance between the two limiting protrusions is greater than the thickness of the tail of the iron core, and the two limiting protrusions together restrict the displacement of the iron core in the left and right directions so that the iron core and the two yokes always maintain a distance.

2. The magnetic circuit structure for magnetic shielding of the wire frame according to claim 1, characterized in that: A front and rear limiting structure is provided between the iron core and the two yokes to restrict the iron core from shifting in the front and rear directions.

3. The magnetic circuit structure for magnetic shielding of the wire frame according to claim 2, characterized in that: The front and rear limiting structures are located at the tail end of the corresponding iron core and are closer to the tail end face than the limiting protrusion.

4. The magnetic circuit structure for magnetic shielding of the wire frame according to claim 2 or 3, characterized in that: The front and rear limiting structure includes a recess formed on at least one side of the iron core and a protrusion disposed on at least one yoke, wherein the protrusion of the yoke extends into the recess of the iron core and is spaced apart from the inner wall of the recess; or, the front and rear limiting structure includes a protrusion formed on at least one side of the iron core and a recess disposed on at least one yoke, wherein the protrusion of the iron core extends into the recess of the yoke and is spaced apart from the inner wall of the recess.

5. The magnetic circuit structure for magnetic isolation of the wire frame according to claim 4, characterized in that: The protrusion and the yoke are integrally connected, or the protrusion is made of a non-magnetic material and is assembled and fixed on the yoke.

6. The magnetic circuit structure for magnetic isolation of the wire frame according to claim 4, characterized in that: The convex part is a spherical arc-shaped convex part, and the inner wall of the concave part is a circular arc-shaped inner wall.

7. The magnetic circuit structure for magnetic shielding of the wire frame according to claim 1, characterized in that: The core also has a middle section located between the head and the tail, the thickness of which is less than the thickness of the head and the tail.

8. The magnetic circuit structure for magnetic isolation of the wire frame according to claim 1, characterized in that: Both yokes have a U-shaped structure, including a horizontal part and a first vertical part and a second vertical part connected to the two ends of the horizontal part. The first vertical parts of the two yokes correspond to each other and are located on the left and right sides of the tail of the iron core, and the second vertical parts of the two yokes correspond to each other and are located on the left and right sides of the head of the iron core.

9. The magnetic circuit structure for magnetic isolation of the wire frame according to claim 8, characterized in that: At the tail end, receiving grooves are provided on the side walls of the wire frame, and the first vertical parts of the two yokes are respectively assembled in the receiving grooves on both sides; at the head end, positioning steps are formed on the side walls of the wire frame, and the second vertical parts of the two yokes are respectively assembled on the positioning steps on both sides.

10. A relay, characterized in that: It includes at least the magnetic circuit structure with magnetic shielding as described in any one of claims 1 to 9.

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