A low noise relay structure

Abstract

The utility model discloses a low -noise relay structure, include: spring piece, armature, core, wherein the spring piece of fixed connection has on the armature, and the core outside wall is equipped with the boss, and the fixed end of spring piece is connected with the armature, and the free end of spring piece is equipped with two grades bifurcation at least, and at least two grades bifurcation gradually with the boss abuts, and the abutment of bifurcation and boss is prior to the abutment of armature and core.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, specifically to a low-noise relay structure. Background Technology

[0002] In existing relays, there is no buffer structure when the armature is attracted, resulting in a large impact force between the armature and the iron core, and thus high noise. Some relays with buffer springs have slots cut into the top of the iron core to accommodate the springs, but this approach changes the base area of ​​the iron core and armature when they are attracted, altering the magnetic flux and affecting the stability of the attraction. In addition, the existing springs are not ideal for noise reduction. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art, the present invention provides a low-noise relay structure that reduces the noise caused by armature impact during engagement without affecting the stability of armature engagement.

[0004] To achieve the above objectives, this utility model discloses a low-noise relay structure, comprising: an armature, a spring, and an iron core. The free end of the spring has at least two stages of branching, and the outer wall of the iron core has a boss. The fixed end of the spring is fixedly connected to the armature, the armature is used to engage with one end of the iron core, and the branching is used to abut against the boss.

[0005] During the armature engagement process, at least two stages of the free end of the spring contact plate abut against the boss in succession, with the abutment between the fork and the boss preceding the abutment between the armature and the iron core.

[0006] As an optional implementation, the spring is configured as follows: a first-level branch is set at the axial centerline of the free end of the spring, and two second-level branches are symmetrically set on both sides with the first-level branch as the axis.

[0007] As an optional implementation, the length of each branch of the spring piece decreases gradually from the middle to both sides, and when all branches abut against the boss, the first branch with the longest length in the middle does not contact the outer wall of the iron core.

[0008] As an optional implementation, the bending angle between the first-level fork and the armature is greater than the bending angle between the second-level fork and the armature; the included angle between each level of fork and the armature is an acute angle.

[0009] As an optional implementation, a protrusion is provided on the side of the first-stage bifurcation free end facing the boss.

[0010] As an optional implementation, the width of the free end of the spring is less than or equal to the width of the boss.

[0011] As an optional implementation, the boss and the spring are arranged facing each other.

[0012] As an optional implementation, the core consists of at least two layers of core sub-units stacked in the same direction.

[0013] As an optional implementation, each core subunit has a boss on one side and a groove on the other side, with the boss and groove positioned correspondingly. When multiple core subunits are stacked together, the boss of one core subunit is embedded in the groove of an adjacent core subunit, and all core subunits are kept flush with the sides facing the armature.

[0014] As an alternative implementation, the protrusion height of the boss and the depth of the groove are both less than the thickness of a single-layer iron core subunit.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The relay structure of this utility model changes the mating position between the spring and the iron core. A boss is provided on the outer wall of the iron core for abutting against the spring, avoiding the need for holes on the contact surface between the iron core and the armature. The shape of the spring is changed, with at least two levels of bifurcations at the free end of the spring, which abut against the boss at each level. This optimizes the spring's rebound force on the armature, making its elastic force curve closer to the magnetic attraction force curve of the iron core on the armature, reducing impact force, and thus reducing noise. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a view showing the overall appearance of the relay according to an embodiment of the present utility model.

[0019] Figure 2 This is a diagram showing the overall assembly of the armature, spring, and iron core in an embodiment of this utility model.

[0020] Figure 3 This is a diagram illustrating the multi-level branching structure of the spring sheet in an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram comparing the force on the armature of the prior art with that of the present invention.

[0022] Figure 5 This is a schematic diagram of the stacking of multi-layer iron core sub-units according to an embodiment of the present invention.

[0023] Figure 6 This is a cross-sectional view of the multi-layer iron core sub-unit stack of an embodiment of this utility model.

[0024] in:

[0025] 1. Armature; 2. Spring; 21. First-stage fork; 22. Second-stage fork; 3. Iron core; 30. Iron core subunit; 31. Boss; 32. Groove; 4. Spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0029] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0030] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0031] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0032] Combination Figure 1 and Figure 2 In this embodiment, the relay includes an armature 1, a spring 2, an iron core 3, a reed 4, a yoke, a coil, a moving contact, a stationary contact, and a frame. The iron core 3 passes through the frame, and the coil is wound around the iron core 3. One end of the iron core 3 is fixedly connected to the yoke, and the armature 1 is rotatably connected relative to the yoke. The armature 1 also corresponds to the other end of the iron core 3. The reed 4 is connected to the armature 1 and the yoke. The moving contact is located on the reed 4, and the stationary contact is located on the frame. The boss 31 is arranged facing the spring 2. One side of the fixed end of the spring 2 is fixedly connected to the armature 1, and one side of the free end of the spring 2 has at least two levels of bifurcations. Preferably, the bifurcation of the spring 2 is arranged as follows: a first level bifurcation 21 is set at the axial centerline of the free end of the spring 2, and the first level bifurcation 21 is used as the... The shaft has two symmetrically arranged second-stage forks 22 on both sides to prevent uneven force on both sides during the contact between the spring piece 2 and the boss 31, which could cause lateral twisting or even damage the stability of the buffering process. The boss 31 is located on the outer wall of the iron core 3, and the free end of the spring piece 2 is located directly above the boss 31. During the process of the armature 1 being attracted by the iron core 3, the first-stage fork 21 and the second-stage fork 22 at the free end of the spring piece 2 are moved towards the boss 31 and contact the boss 31 step by step. The contact between the fork and the boss 31 is before the contact between the armature 1 and the iron core 3. Specifically, as the attraction proceeds, the first-stage fork 21 first contacts the boss 31, then the second-stage fork 22 contacts the boss 31, and finally the armature 1 contacts the iron core 3.

[0033] This setup differs from existing technologies in that it does not require a slot on the contact surface between the iron core 3 and the armature 1 for abutting against the spring 2, thus preserving the original magnetic attraction area of ​​the iron core 3. By changing the shape of the spring 2 and setting a two-stage fork at the free end of the spring 2, the rebound force of the spring 2 on the armature 1 is optimized, making its elastic force curve closer to the magnetic attraction force curve of the iron core 3 on the armature 1, reducing impact force, and thus reducing noise.

[0034] For ease of understanding, the following comparison of the stress conditions in existing technologies with the two-stage bifurcation stress conditions of this solution is presented. (Refer to...) Figure 1 and Figure 4 F1 is the magnetic attraction force of the armature 1 on the iron core 3; F2 is the rebound force of the armature 1 when the existing technology uses a spring without a forked structure; F3 is the rebound force of the armature 1 when the present invention uses a spring 2 with a forked structure.

[0035] From point 0 to point M on the horizontal axis, which is the initial stage of the attraction process between armature 1 and core 3, the magnetic attraction force curve F1 increases as armature 1 and core 3 approach each other. Figure 4In this stage, the slope of F1 gradually increases; at this stage, the spring has not yet intervened to buffer, and F2 and F3 are only subjected to the same rebound force of the spring 4 on the armature, therefore... Figure 4 In this case, F2 and F3 overlap between point 0 and point M.

[0036] Point M represents the instant when the spring 2 first contacts the boss 31. In the existing technology, the spring 2 with a non-forked structure experiences a rebound force on the armature 1 after contacting the boss 31, which is the sum of the spring force of the spring 4 and the elastic force of the spring 2. Figure 4 The behavior is that the slope of F2 to the right of point M is greater than the slope to the left of point M; after the first-stage fork 21 of this utility model contacts the boss 31, the rebound force on the armature 1 is the spring force of the spring 4 superimposed on the elastic force of the first-stage fork 21 at the free end of the spring 2. Since the first-stage fork 21 is generated by axial cutting of the free end of the spring 2, its stiffness is less than that of the uncut whole spring 2. Therefore, the rebound force of the first-stage fork 21 on the armature 1 at this stage is less than the rebound force of the whole spring 2 on the armature 1. After superimposing the rebound force of the spring 4, F3 in Figure 4 In this stage, the slope increases compared to the left of point M, but in this segment, the slope of F3 is less than that of F2.

[0037] Point P represents the instant when the second-stage fork 22 of this invention contacts the boss 31. After the second-stage fork 22 contacts the boss 31, the elastic force generated by the second-stage fork 22 is superimposed on the rebound force received by the armature 1. After superposition, the total elastic force received by the armature 1 is stronger than that of the prior art. Figure 4 The behavior is that the slope of F3 increases after passing point P, and the increased slope is greater than the slope of F2 in this stage.

[0038] Point N represents the instant when armature 1 and iron core 3 are attracted together. At this moment, the magnetic attraction force F1 on the armature is greater than the rebound forces F2 and F3. It can be clearly seen that at point N, the value of F3 is closer to F1 than F2. That is, the rebound force generated by the multi-stage bifurcation scheme of the spring in this utility model on armature 1 is closer to the attraction force of iron core 3 on armature 1. The difference between the two is the impact force of armature 1 on iron core 3. Therefore, the multi-stage bifurcation scheme of the free end of the spring disclosed in this utility model significantly reduces the impact force of armature 1 on iron core 3, thereby reducing the noise generated by the impact.

[0039] As a more preferred embodiment, more levels of branching, such as three or four levels, can be provided at the free end of the spring piece 2. The arrangement is the same as the second-level branching, both being symmetrically arranged on both sides with the first-level branching 21 as the axis, which can further improve the buffering effect. Figure 4 The corresponding behavior is that F3 has more slopes that gradually increase between points M and P, and eventually the value of F3 at point N is closer to the value of F1 at point N, reducing the difference between F1 and F3, further reducing the impact force of the armature on the iron core, and reducing impact noise.

[0040] In summary, the core improvement of this invention lies in the multi-stage differentiation of the free end of the spring sheet according to actual needs. This causes the rebound force during the spring sheet buffering process to increase with the increase of the magnetic attraction force, ultimately becoming closer to the magnetic attraction force. This is reflected in the elastic force curve of the armature: compared to F2, which has a fixed slope between points M and N, F3 has a progressively increasing slope between points M and N, closely resembling the magnetic attraction force curve. The more stages of bifurcation, the more times the slope of F3 changes, and the closer it is to the magnetic attraction force curve. In terms of user experience, the entire spring sheet buffering process exhibits a "gentle initial intervention, gradual progression, and ultimate cancellation" effect, significantly improving the user experience.

[0041] To achieve better implementation results, the following features of the relay were also optimized:

[0042] The length of each branch decreases gradually from the middle to both sides. This is because, compared to existing technologies, multi-stage branches have smaller spring widths, resulting in lower stiffness and elasticity. Gradually decreasing the branch length increases the stiffness and rebound force of each branch, achieving a gradually increasing buffering effect.

[0043] When all the branches abut against the boss 31, the longest first-stage branch 21 does not contact the outer wall of the iron core 3. The reason is that if the first-stage branch 21 contacts the outer wall, the relay engagement process will be interrupted, and the spring buffer will not be able to continue. In order to ensure the normal operation of the relay, it is necessary to ensure that the spring does not contact the outer wall of the iron core 3 at any time.

[0044] The angles between each branch and the armature 1 are all acute angles, decreasing progressively from the center of the spring piece 2 towards both sides. This is because all branches are rooted in the spring piece 2, and the progressively decreasing bending angles ensure that the distance between each branch and the boss 31 increases progressively when the free end of the spring piece 2 is not involved in buffering. This, in turn, ensures that each branch sequentially engages with the boss 31 during the buffering process.

[0045] The reason for setting a protrusion at the free end of the first-stage fork 21 is that the first-stage fork 21 has the longest contact time and the largest displacement with the boss 31 during the entire buffering process. Setting a protrusion can change the contact between the first-stage fork 21 and the boss 31 to point contact, thereby reducing friction.

[0046] The width of the free end of the spring piece 2 is less than or equal to the width of the boss 31. The reason is that this utility model performs axial multi-stage cutting on the free end of the spring piece 2. If the width of the free end of the spring piece 2 is greater than the width of the boss 31, it is possible that when the entire width of the boss 31 abuts against the middle branch of the spring piece 2, some branches of the spring piece 2 on both sides will still be suspended. Therefore, the width of the free end of the spring piece 2 is limited to be less than or equal to the width of the boss 31 to ensure that all branches can abut against the boss 31 normally.

[0047] In addition to the innovative design of shrapnel 2, see also Figure 5 This utility model replaces the iron core 3 with a stacked design of iron core sub-units 30. The iron core sub-units 30 are components with fixed specifications and styles, and they can be interlocked and stacked. By simply increasing or decreasing the number of stacked iron core sub-units 30, the contact area between the iron core 3 and the armature 1 can be flexibly adjusted, reducing production costs and simplifying the manufacturing process, which has had a significant positive impact on the production of relays.

[0048] Specifically, in this embodiment, the core sub-unit 30 is provided with three units, so that... Figure 5 As shown in the direction reference, three iron core sub-units 30 are stacked sequentially from left to right in the same direction. Each iron core sub-unit 30 has a protrusion 31 on one side and a groove 32 on the other side. The protrusion 31 and the groove 32 are positioned correspondingly. When multiple layers of iron core sub-units 30 are stacked together, the protrusion 31 of one iron core sub-unit 30 is embedded in the groove 32 of the adjacent iron core sub-unit 30. In order to ensure the attraction area between the armature and the iron core, the sides of all iron core sub-units 30 facing the armature are kept flush, so that when the armature and the iron core are attracted, the armature can contact the sides of all iron core sub-units 30.

[0049] Because each individual iron core sub-unit 30 has a protrusion 31 on one side and a groove 32 on the other side, and the protrusion 31 and the groove 32 are positioned correspondingly, in order to ensure that the protrusion 31 can be correctly positioned on the iron core sub-unit 30, the groove cannot penetrate the iron core sub-unit 30. Therefore, the protrusion height of the protrusion 31 and the depth of the groove 32 are both less than the thickness of a single-layer iron core sub-unit 30.

[0050] Understandably, depending on different design needs, the number of core sub-units 30 can be two, four, etc., as long as the design requirements are met.

[0051] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A low-noise relay structure, characterized in that, include: armature; A spring sheet, wherein the free end of the spring sheet has at least two levels of bifurcation; Iron core, wherein a boss is provided on the outer side wall of the iron core; The fixed end of the spring is fixedly connected to the armature, the armature is used to attract one end of the iron core, and the fork is used to abut against the boss. During the armature attraction process, at least two levels of the forks at the free end of the spring abut against the boss step by step. The abutment of the fork against the boss is before the abutment of the armature against the iron core.

2. The low-noise relay structure according to claim 1, characterized in that, The forking method of the spring piece is as follows: a first-level fork is set at the axial center line of the free end of the spring piece, and two second-level forks are symmetrically set on both sides with the first-level fork as the axis.

3. The low-noise relay structure according to claim 2, characterized in that, The length of each branch of the spring piece decreases gradually from the middle to both sides, and when all the branches abut against the boss, the longest first-level branch does not contact the outer wall of the iron core.

4. The low-noise relay structure according to claim 2, characterized in that, The bending angle between the first-level fork and the armature is greater than the bending angle between the second-level fork and the armature; the included angle between each level of fork and the armature is an acute angle.

5. The low-noise relay structure according to claim 2, characterized in that, The free end of the first-stage branch has a protrusion on the side facing the boss.

6. The low-noise relay structure according to any one of claims 1 to 5, characterized in that, The width of the free end of the spring is less than or equal to the width of the boss.

7. The low-noise relay structure according to claim 6, characterized in that, The boss is positioned opposite to the spring piece.

8. The low-noise relay structure according to any one of claims 1 to 5, characterized in that, The iron core is composed of at least two iron core sub-units stacked in the same direction.

9. The low-noise relay structure according to claim 8, characterized in that, Each core subunit has a boss on one side and a groove on the other side, with the boss and groove being positioned opposite each other. When multiple core subunits are stacked in the same direction, the boss of one core subunit is embedded in the groove of another adjacent core subunit, and all core subunits are kept flush with the sides facing the armature.

10. The low-noise relay structure according to claim 9, characterized in that, The protrusion height of the boss and the depth of the groove are both less than the thickness of a single-layer iron core subunit.

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