Anti-falling electromagnetic relay
By designing a multi-point positioning reference and limit buckle structure between the shell of the electromagnetic relay and the coil frame, the problem of poor drop resistance in the prior art is solved, and higher position accuracy and drop resistance are achieved.
Patent Information
- Application Number
- CN202520857852.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2035-04-30
AI Technical Summary
During the impact of drop-resistant electromagnetic relays such as drop, bump vibration, etc., the operating parameters are prone to change, resulting in poor anti-drop effect, especially the assembly structure of the armature at the yoke cutting edge is difficult to effectively restrict.
A drop-resistant electromagnetic relay is designed. When the housing of the first boss passes through the spring giving way to the movable spring blade through the first boss and abuts against the blade of the yoke to form a positioning reference. In addition, the second and third bosses in the housing cooperate with the first boss to form a triangular positioning reference to ensure high-precision assembly of the housing and the coil frame, and limit the armature through a limit buckle.
It effectively reduces the dispersion between the positioning reference and the anti-fall limit structure, improves the relative position accuracy, reduces the design technology difficulty, and significantly improves the anti-fall effect.
Smart Images
Figure CN222980401U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electromagnetic relays, in particular to a drop-resistant electromagnetic relay. Background Art
[0002] In the technical field of electromagnetic relays, there is an electromagnetic relay with a coil bobbin of I-shaped structure. One end baffle (i.e., the base side baffle) of the coil bobbin serves as the base for arranging the yoke iron and each pin (such as the coil pin, static reed pin, moving reed pin), etc. The outer side of the other end baffle (i.e., the contact side baffle) is used for arranging the armature, the static and moving contact matching structure, etc. The winding cylinder between the base side baffle and the contact side baffle is used for arranging the coil. The yoke iron arranged on the base side baffle of the aforesaid coil bobbin is of L-shaped structure, and it winds back to the contact side baffle so that the armature can be reversibly assembled through the moving reed. Such electromagnetic relays are usually called small clapper-type or "sugar cube type" electromagnetic relays in the industry. They have technical characteristics such as simple structure, compact structure, small volume, and low power, and are widely used in working condition electrical equipment such as communication equipment, automobiles, and household appliances with compact and narrow layout spaces.
[0003] Due to the formed structure of such electromagnetic relays, during obvious impacts such as dropping, bumping, and vibration, large changes in operating parameters are likely to occur, and the normal use function cannot be reliably realized. This change is particularly prominent in the assembly structure where the armature passes through the moving reed at the edge of the yoke iron. Therefore, an anti-drop structure is usually designed for such electromagnetic relays to restrict the displacement and deformation of the armature, etc. during the impact. Also, due to the influence of the electromagnetic attraction change and the elastic force of the moving reed on the armature, the armature needs to use the edge of the yoke iron as a "hinge axis" to generate a flipping action. The restraint of the armature must not be simply achieved by abutting and jamming. While ensuring the normal flipping action, its displacement and deformation during the impact need to be restricted by a relative structure. The usual design method is to form a convex rib structure that protrudes and is close to the armature and / or the moving reed inside the outer shell. When the outer shell is assembled in place on the coil bobbin, theoretically, the designed convex rib structure approaches the armature and / or the moving reed with a designed gap to prevent the displacement and deformation of the armature, etc. during the impact.
[0004] In the prior art, in the design of the assembly structure of the bobbin and the housing of such anti-drop electromagnetic relays, an assembly positioning reference surface with a concave-convex fit is formed between the edge of the side baffle of the base of the bobbin and the edge of the opening of the housing to ensure the relative positions between the rib structure inside the housing and the armature, etc. However, since the arrangement position of the armature on the bobbin is far from the side baffle of the base and is outside the contact side baffle, using the positioning reference surface at the side baffle of the base to ensure the relative position accuracy between the armature outside the contact side baffle and the adjacent housing area makes it difficult to reliably control the accuracy of this relative position, with a large scatter, which not only increases the design technical difficulty but also is not conducive to reliably ensuring the anti-drop effect on the armature, etc.
[0005] Therefore, the anti-drop performance of the above electromagnetic relay needs to be improved. Summary of the Utility Model
[0006] The technical object of the present utility model is: aiming at the particularity of the above-mentioned small clapper-type electromagnetic relay and the deficiencies of the prior art, to provide an anti-drop type electromagnetic relay that is conducive to reducing the design technical difficulty and reliably improving the anti-drop effect.
[0007] The technical object of the present utility model is achieved through the following technical solutions. An anti-drop type electromagnetic relay includes a bobbin with an I-shaped structure, as well as a yoke and a housing assembled on the bobbin;
[0008] At the knife edge of the yoke, an armature that can perform a flipping action is assembled through a moving reed;
[0009] A moving reed relief notch exposing the corresponding area of the armature is formed on the moving reed at the knife edge of the yoke;
[0010] A first boss that can pass through the moving reed relief notch is formed in a protruding manner inside the housing; when the housing is assembled in place on the bobbin, the first boss inside the housing passes through the moving reed relief notch and abuts against the knife edge of the yoke.
[0011] The above technical measures, aiming at the particularity of the above-mentioned small clapper-type electromagnetic relay, make the assembled housing abut against the knife edge of the yoke assembled on the bobbin, so that the abutting structure of the housing on the knife edge of the yoke serves as the positioning reference for the housing assembled on the bobbin. The arrangement position of this positioning reference in the entire electromagnetic relay structure is close to the armature, making it close to the anti-drop limiting structure, which is conducive to effectively reducing the scatter between the positioning reference and the anti-drop limiting structure, thereby being able to reliably improve the relative position accuracy between the positioning reference and the anti-drop limiting structure. On the one hand, it is conducive to reducing the design technical difficulty of the entire electromagnetic relay, and on the other hand, it can reliably improve the anti-drop effect.
[0012] As one of the preferred technical solutions, the armature has an armature positioning notch at the knife edge of the yoke, and the armature positioning notch is within the range covered by the moving spring relief notch.
[0013] When the housing is assembled in place on the bobbin, the first boss inside the housing passes through the moving spring relief notch and is inserted into the armature positioning notch to abut against the yoke.
[0014] The first boss of the housing and the armature are in clearance fit, and the clearance size of this clearance fit allows the armature to perform a flipping action according to the design requirements.
[0015] The above technical measures are for the positioning reference structure where the housing abuts at the knife edge of the yoke. A positioning notch is formed in the corresponding area of the armature for the first boss that can form the positioning reference to pass through. So that while the housing realizes the positioning reference at the knife edge of the yoke through the first boss, on the premise of not hindering the flipping action of the armature, the armature is constrained and limited in the left - right direction relative to the first boss, improving the anti - dropping effect on the armature. That is to say, the above technical measures enable the first boss of the housing to realize the positioning reference at the knife edge of the yoke and also bear the anti - dropping effect of constraining and limiting the armature in the left - right direction (i.e., corresponding to the width direction of the armature).
[0016] As one of the preferred technical solutions, the first boss inside the housing is a stepped structure. When the housing is assembled in place on the bobbin, the first boss has a limiting table surface extending to the top side of the armature.
[0017] When the housing is assembled in place on the bobbin, the limiting table surface of the first boss and the armature are in clearance fit, and the clearance size of this clearance fit allows the armature to perform a flipping action according to the design requirements.
[0018] The above technical measures form a limiting table surface at the top side of the armature on the first boss of the housing. On the premise of not hindering the flipping action of the armature, it bears the constraint and limitation of the armature in the top - side direction (i.e., the flipping direction of the armature away from the bobbin). (Assuming the bottom side baffle of the bobbin is the bottom and the contact - side baffle is the top, then a vertical constraint and limitation are formed), further improving the anti - dropping effect on the armature.
[0019] As one of the preferred technical solutions, inside the housing, a second boss is also integrally formed in front of the left side of the first boss and / or a third boss is integrally formed in front of the right side of the first boss.
[0020] When the housing is assembled in place on the bobbin, the second boss and / or the third boss inside the housing abut against the contact - side baffle of the bobbin.
[0021] In the above technical measures, in the area of the contact side baffle where the outer shell mates with the bobbin holder, protrusions are formed to cooperate with the first boss, the second boss and / or the third boss that abuts against the bobbin holder (especially the state where the second boss and the third boss coexist to form a triangular positioning), so that the assembly of the outer shell on the bobbin holder is positioned by the abutment of three bosses to form a three-point positioning reference with a triangular distribution. The stable formation of the assembly positioning reference of the outer shell on the bobbin holder is ensured by the coordinated cooperation of the three-point positioning reference. In addition, the arrangement positions of these positioning references in the entire electromagnetic relay structure are close to the armature, making them relatively close to the anti-drop limit structure, which is beneficial to effectively reduce the scatter between the positioning reference and the anti-drop limit structure, thereby being able to reliably improve the relative position accuracy between the positioning reference and the anti-drop limit structure, and ensuring that the anti-drop limit structure is stably maintained with high precision according to the design requirements, and reliably improving the anti-drop effect.
[0022] As one of the preferred technical solutions, on the contact side baffle of the bobbin holder, corresponding to the front end of the armature away from the yoke, a limiting buckle is formed by protrusion, which can restrict and limit the armature.
[0023] The limiting buckle and the armature are in clearance fit, and the clearance size of this clearance fit allows the armature to perform a flipping action according to the design requirements.
[0024] On the premise of not interfering with the flipping action of the armature, the above technical measures use the limiting buckle on the contact side baffle to cooperate with the first boss on the outer shell to form a restraint limit on the armature in the direction from the yoke blade to the contact cooperation direction (assuming the position of the yoke blade is the rear and the position of the contact cooperation area is the front, then a front-rear direction restraint limit is formed), which reliably improves the anti-drop effect on the armature.
[0025] Furthermore, the limiting buckles on the contact side baffle are two groups arranged at intervals, and are correspondingly formed at the two corner parts of the front end of the armature. This technical measure can meet the condition of restricting and limiting the armature at the front end, will not interfere with the structure of the moving reed connected to the armature extending forward, and the restraint limit on the armature at the front end is relatively balanced and stable.
[0026] Furthermore, the limiting buckle has a front stop column at the front end of the armature, and a top-side folded edge that folds back to the top side of the armature on the front stop column. The top-side folded edge and the front stop column are in an L-shaped structure cooperation. The limiting buckle of this technical measure forms a restraint limit in the front-rear direction (i.e., the direction corresponding to the yoke to the contact cooperation area) and the up-down direction (i.e., the direction corresponding to the base side baffle and the contact side baffle) at the front end of the armature, and the anti-drop effect on the armature is reliable.
[0027] Furthermore, the limiting retaining buckle further has a side-folded edge that is folded back to the left / right side edge of the armature on the front retaining post, and the side-folded edge and the front retaining post are cooperatively arranged in an L-shaped structure. The limiting retaining buckle of this technical measure forms a constraint limit in the left-right direction (i.e., corresponding to the width direction of the armature) at the front end of the armature. Combining with the above-mentioned constraint limits of the armature in the front-back direction and the up-down direction, a three-dimensional constraint limit is formed on the armature, and the anti-drop effect on the armature is excellent.
[0028] Moreover, the side-folded edge of the limiting retaining buckle is folded downward at the corresponding edge of the top-folded edge, and the side-folded edge and the top-folded edge are cooperatively arranged in an L-shaped structure, and the bottom edge of the side-folded edge is in a spaced cooperation with the contact side baffle. While achieving a three-dimensional constraint limit on the armature, this technical measure forms a process relief notch (i.e., the spaced cooperation structure between the bottom edge of the side-folded edge and the contact side baffle) at the edge of the limiting retaining buckle corresponding to the armature, so as to ensure the easy and reliable implementation of the process test (such as OT tracking test) for the entire electromagnetic relay.
[0029] As one of the preferred technical solutions, in the housing, the area corresponding to the contact and cooperation position has a contact and cooperation relief groove with a concave structure. Based on the high-precision and small-gap cooperation between the above-mentioned housing and the coil holder, as well as the special characteristics of the contact and cooperation action of the contacts in the electromagnetic relay structure, in order to adapt to the elastic impact of the moving contact of the moving reed on the fixed contact of the positioning piece during release, a relief groove is formed in the housing to match the contact and cooperation position, so as to reduce the position interference of the housing on the contact and cooperation action and ensure the stable maintenance of the contact and cooperation action.
[0030] The beneficial technical effects of the present utility model are as follows: The above-mentioned technical measures are directed to the particularity of the above-mentioned small clapper-type electromagnetic relay. The assembled housing abuts against the blade edge of the yoke iron assembled with the coil holder. Especially under the abutting cooperation of the other two bosses on the contact side baffle of the coil holder, the abutting structures of the housing on the blade edge of the yoke iron and the contact side baffle are used as the positioning reference for the assembly of the housing on the coil holder. The arrangement positions of these positioning references in the entire electromagnetic relay structure are close to the armature, making them relatively close to the anti-drop limiting structure, which is beneficial to effectively reducing the scatter between the positioning reference and the anti-drop limiting structure, thereby being able to reliably improve the relative position accuracy between the positioning reference and the anti-drop limiting structure and ensure the stability of the positioning reference, which is beneficial to reducing the design technical difficulty of the entire electromagnetic relay. At the same time, the assembly positioning structure of the housing on the coil holder can reliably improve the anti-drop effect, which is particularly prominent in the structure where the first boss on the housing cooperates with the two limiting retaining buckles on the coil holder, forming a three-dimensional constraint limit on the armature assembled on the coil holder in the front-back direction, up-down direction, and left-right direction, and the anti-drop effect is excellent. Description of the Drawings
[0031] Figure 1 This is a top view of the electromagnetic relay of the present utility model at the top side of the housing.
[0032] Figure 2 It is Figure 1 the A-A view in
[0033] Figure 3 It is Figure 2 the partial enlarged view in
[0034] Figure 4 It is Figure 1 the B-B view in
[0035] Figure 5 It is Figure 1 the structural schematic diagram of the housing in the upward viewing direction in
[0036] Figure 6 It is Figure 5 the three-dimensional perspective view of the housing shown.
[0037] Figure 7 It is Figure 1 the three-dimensional view of the electromagnetic relay shown after removing the housing.
[0038] Figure 8 It is Figure 7 the structural schematic diagram of the coil holder in
[0039] Figure 9 It is Figure 8 the side view of
[0040] The meanings of the codes in the figure: 1 - coil holder; 11 - winding bobbin; 12 - base side baffle; 13 - contact side baffle; 14 - yoke iron assembly groove; 15 - limit retaining buckle; 151 - front retaining post; 152 - top side folded edge; 153 - side folded edge; 2 - yoke iron; 3 - housing; 31 - first boss; 311 - limit table surface; 32 - second boss; 33 - third boss; 34 - contact fitting relief groove; 4 - armature; 41 - armature positioning notch; 5 - moving reed; 51 - moving reed relief notch. Specific embodiments
[0041] The present utility model relates to the technical field of electromagnetic relays, and specifically is an anti-drop electromagnetic relay. The main technical solution content of the present utility model will be specifically described below in combination with multiple embodiments. Among them, Embodiment 1 is combined with the specification drawings - that is Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8and Figure 9 Clearly and in detail explain the technical solution content of the present utility model; although other embodiments are not separately drawn, their main structures can still refer to the drawings of Embodiment 1.
[0042] It should be particularly noted here that the drawings of the present utility model are schematic. In order to clarify the technical purpose of the present utility model, unnecessary details have been simplified to avoid obscuring the technical solution contributed by the present utility model to the prior art. In addition, expressions such as "about" and "substantially" regarding quantity or mating relationship in the following text mean that reasonable assembly errors, processing errors, etc. are allowed in the industry, rather than literal expressions of absolute quantity or mating relationship.
[0043] Embodiment 1
[0044] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown in, the electromagnetic relay of the present utility model is a small clapper - type electromagnetic relay, which includes a bobbin 1 with an I - shaped structure, and a coil, an iron core, a yoke 2, an armature 4, a moving spring assembly, a static spring assembly, a positioning piece assembly and a housing 3 assembled on the bobbin 1.
[0045] Since the electromagnetic relay of the present utility model is a three - dimensional structure and consists of multiple components, in the following clear description of the component structure and their mutual cooperation relationship, directional terms such as front - rear, up - down, left - right, inside - outside, etc. will inevitably be used. Therefore, to avoid confusion and misunderstanding of directional terms, the following explanations are made: taking the area where the yoke blade edge is located in the electromagnetic relay structure as "rear", the area where the contact - mating area corresponding to the yoke blade edge is located as "front", the position of the contact - side baffle of the bobbin as "up", the position of the base - side baffle of the bobbin as "down", taking the moving - spring relief notch on the moving spring as the reference center, and distinguishing the "left" and "right" relative positions along the width direction of the armature / moving spring, taking the position towards the center of the bobbin as "inside", and taking the position away from the center of the bobbin as "outside". In addition, for other possible directional terms used - such as "bottom" and "top", refer to the above explanations, for example, "bottom" corresponds to "down" and "top" corresponds to "up".
[0046] As Figure 8 and Figure 9As shown, the bobbin 1 has an integrally formed winding cylinder 11, a base side baffle 12 at the lower end of the winding cylinder 11, and a contact side baffle 13 at the upper end of the winding cylinder 11. Among them, the yoke 2, the pins of the coil, the pins of the moving reed assembly, and the pins of the static reed assembly are assembled on the base side baffle 12, and the open end of the housing 3 is fitted. Therefore, a yoke assembly groove 14 is formed on the base side baffle 12, and the open end of the yoke assembly groove 14 faces backward, away from the contact area of the contact side baffle 13 described below. The contact side baffle 13 is used to assemble the armature 4, the moving reed 5 of the moving reed assembly, the static reed of the static reed assembly, and the positioning piece assembly. The following limiting buckle 15 is formed by convexity on the outside of the contact side baffle 13.
[0047] As Figure 2 , Figure 3 , Figure 4 and Figure 7 shown, the yoke 2 has an L-shaped structure, the bottom of its horizontal structure is inserted into the yoke assembly groove 14 of the base side baffle 12 of the above-mentioned bobbin 1, the vertical structure extends vertically upward at the open end of the yoke assembly groove 14, and the vertical top of the yoke 2 is at the contact side baffle 13 of the bobbin 1. The moving reed 5 of the moving reed assembly has an L-shaped bent structure, its vertical part is connected to the outer side of the aforementioned yoke 2, and its horizontal part is connected to the outer side of the armature 4. The rear end of the armature 4 is assembled on the top of the yoke 2 through the moving reed 5 (the industry usually refers to this top of the yoke assembling the armature as the "knife edge"). Under the action of electromagnetic suction and the moving reed 5, the armature 4 can take the knife edge of the yoke 2 as the "hinge axis" and generate inward / outward flipping actions.
[0048] To achieve the abutment positioning of the housing 3 at the knife edge of the yoke 2 and the anti-drop constraint limit of the armature 4, as Figure 7 shown, on the moving reed 5 at the middle of the knife edge of the above-mentioned yoke 2, a moving reed relief notch 51 exposing the corresponding area of the armature 4 is opened, and the moving reed relief notch 51 can allow the first boss 31 of the following housing 3 to penetrate and abut against the yoke 2. To cooperate with the abutment of the first boss 31 of the housing 3 on the knife edge of the yoke 2 and to constrain and limit the armature 4, the armature 4 has a U-shaped armature positioning notch 41 within the coverage of the moving reed relief notch 51 at the knife edge of the yoke 2.
[0049] As Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, corresponding to the moving reed relief notch 51 on the above-mentioned moving reed 5 and the armature positioning notch 41 on the armature 4, at the inner top of the housing 3, at the position corresponding to the armature positioning notch 41, a first boss 31 is formed by convex molding, which can pass through the moving reed relief notch 51 on the moving reed 5 and be inserted into the armature positioning notch 41 on the armature 4. When the housing 3 is assembled in place on the bobbin 1, the base side baffle 12 of the bobbin 1 is fitted into the open end of the housing 3. Of course, there is no assembly positioning requirement for this place. The first boss 31 in the housing 3 passes through the moving reed relief notch 51 on the moving reed 5 and is inserted into the armature positioning notch 41 on the armature 4, so as to abut against the cutting edge of the yoke iron 2. On the one hand, it forms a positioning reference for the assembly of the housing 3 on the bobbin 1. This positioning reference enables the rear end of the armature 4 and the first boss 31 of the housing 3 to be assembled on the cutting edge of the yoke iron 2, which is beneficial to setting the positioning reference of the first boss 31 close to the armature 4, thus facilitating the improvement of the accuracy of the top-side limit design for the rear end of the armature 4; on the other hand, the insertion of the first boss 31 into the armature positioning notch 41 forms a constraint limit for the armature 4 in the left-right direction at the rear end. To further improve the constraint limit of the first boss 31 of the housing 3 on the armature 4, as Figure 3 shown, the first boss 31 in the housing 3 is a stepped structure. When the housing 3 is assembled in place on the bobbin 1, the first boss 31 has a limit table surface 311 extending to the top side of the armature 4, so that the first boss 31 forms a constraint limit for the armature 4 in the up-down direction (especially the upward outward turning action) at the rear end of the armature 4. In the above-mentioned constraint limit structure of the first boss 31 on the armature 4, since the armature 4 needs to perform a flipping action that meets the design requirements on the cutting edge of the yoke iron 2, there should be a clearance fit between the first boss 31 of the housing 3 and the armature 4 (including the part where the first boss 31 is inserted into the armature positioning notch 41 and the part between the limit table surface 311 and the outer surface of the armature 4). It is required that the clearance size of this clearance fit meets the design technical requirements and allows the armature 4 to perform a flipping action according to the design requirements. Those exceeding the allowable outward turning stroke are constrained and limited. That is to say, when the housing 3 is assembled in place on the bobbin 1, there is a clearance fit between the first boss 31 and the armature positioning notch 41 of the armature 4, and between the limit table surface 311 of the first boss 31 and the outer surface of the armature 4, respectively, and the clearance size of this clearance fit allows the armature 4 to perform a flipping action according to the design requirements.
[0050] As above, the housing 3 forms a positioning reference for the assembly of the housing 3 on the bobbin 1 by the abutment of the first boss 31 at the cutting edge of the yoke iron 2. Of course, relying solely on this one positioning reference, it is relatively difficult to ensure the stability of the assembly of the housing 3 on the bobbin 1, which is not conducive to ensuring the stable formation of the anti-drop limit structure on the housing 3 (i.e., the limit table surface 311 on the first boss 31), nor is it conducive to ensuring the stable maintenance of the relative structure between other parts of the housing 3 and the outside of the contact side baffle 13. Therefore, as Figure 4 、Figure 5 and Figure 6 As shown in Figure 6 , inside the housing 3, there are also two positioning boss structures formed in a convex structure to cooperate with the first boss 31. That is, with the first boss 31 as the reference benchmark and the contact mating area as the front, a second boss 32 is formed in front of the left side of the first boss 31, and a third boss 33 is formed in front of the right side. The specific forming positions of the second boss 32 and the third boss 33 on the housing 3 should be such that when the housing 3 is assembled in place on the bobbin 1, it correspondingly abuts against the left and right side edges of the contact side baffle 13 of the bobbin 1 without interfering with other structures in terms of position. In this way, the mutual cooperation of the first boss 31, the second boss 32, and the third boss 33 inside the housing 3 forms a three-point positioning with a triangular distribution when the housing 3 is assembled on the bobbin 1, so as to reliably ensure a high-precision mating gap between the housing 3 and the relative structure on the outside of the contact side baffle 13, especially the mating gap for restricting and positioning the armature 4, and the mating gap for the contact mating area.
[0051] In order to further improve the restraint and positioning of the armature 4 and enhance the anti-drop technical effect of the armature 4, as Figure 2 , Figure 4 , Figure 7 , Figure 8 and Figure 9 shown, on the outside of the contact side baffle 13 of the bobbin 1, at positions corresponding to the two front corners of the armature 4, two groups of limit retaining buckles 15 that can restrain and position the armature 4 are integrally formed and protruded. As described above, it is required that there is a clearance fit between each group of limit retaining buckles 15 and the armature 4 respectively, and the clearance size of this clearance fit allows the armature 4 to perform a flipping action according to the design requirements.
[0052] Specifically, each group of limit retaining buckles 15 has a front retaining post 151 at the corresponding front corner of the armature 4, a top-side folding edge 152 that folds back to the top side of the armature 4 on the front retaining post 151, and a side-side folding edge 153 that folds back to the corresponding side of the armature 4 on the front retaining post 151. The side-side folding edge 153 folds down at the corresponding side of the top-side folding edge 152. The top-side folding edge 152 and the front retaining post 151 are in an L-shaped structure fit; the side-side folding edge 153 and the front retaining post 151 are in an L-shaped structure fit; the side-side folding edge 153 and the top-side folding edge 152 are in an L-shaped structure fit. To meet the technical requirements of process testing, the bottom edge of the side-side folding edge 153 of the limit retaining buckle 15 has a spacing fit with the contact side baffle 13, leaving an operating space for process testing.
[0053] The above two groups of limit retaining buckles 15 cooperate with the first boss 31 of the above housing 3 to form a three-dimensional restraint and positioning of the armature 4 in the front-back direction, up-down direction, and left-right direction, so that the anti-drop technical effect of the armature 4 is excellently demonstrated.
[0054] In the above-mentioned mating structure of the housing 3 and the bobbin 1, a high-precision fit is achieved, so there is no need to have an excessive redundant fit clearance. Therefore, a small clearance fit that meets the technical requirements is formed between the contact side baffle 13 of the housing 3 and the bobbin 1. To adapt to the elastic movement of the contact area outside the contact side baffle 13, such as Figure 2 , Figure 4 , Figure 5 and Figure 6 as shown, inside the housing 3, in the area corresponding to the contact mating position (i.e., the position of the contact area), there is a contact mating relief groove 34 with a concave structure.
[0055] Embodiment 2
[0056] Other contents of this embodiment are the same as those of Embodiment 1, the difference is that:
[0057] The relief notch of the armature at the knife edge of the yoke is removed;
[0058] The knife edge of the yoke and the rear end of the armature are mated with a stepped structure. The first boss inside the housing abuts against the knife edge of the yoke and has a clearance fit with the rear end of the armature. The limiting table surface of the first boss still extends to the top side of the armature and has a clearance fit.
[0059] This embodiment makes the first boss of the housing lose the function of restricting and positioning the rear end of the armature in the left and right directions, and in the normal thickness design of the yoke, the contact surface between the first boss and the yoke will be reduced, and the stability is relatively insufficient, but it can achieve the technical purpose of the present invention.
[0060] Embodiment 3
[0061] Other contents of this embodiment are the same as those of Embodiment 1, the difference is that:
[0062] One of the second boss and the third boss inside the housing is provided and the other is removed;
[0063] In this way, the second boss / third boss inside the housing cooperates with the first boss to form a positioning reference support with two-point abutment, and the stability is relatively insufficient, but it can achieve the technical purpose of the present invention to a certain extent.
[0064] Embodiment 4
[0065] Other contents of this embodiment are the same as those of Embodiment 1, the difference is that:
[0066] The limiting retaining buckle on the outer side of the contact side baffle of the bobbin holder is arranged in a single structure and formed at the left corner / right corner of the front end of the armature. Of course, the resulting constraint and limiting effect, especially the constraint and limiting effect on the front end of the armature in the left-right direction, will be relatively reduced, but the technical purpose of the present utility model can be achieved to a certain extent.
[0067] Embodiment 5
[0068] Other contents of this embodiment are the same as those of Embodiment 1, and the differences are as follows:
[0069] The limiting retaining buckle on the outer side of the contact side baffle of the bobbin holder is arranged in a single structure, and its forming position is at the middle of the width of the front end of the armature; since the moving reed needs to extend from the front end of the armature, there is a position interference with the moving reed, so a relief notch is provided on the moving reed to allow the limiting retaining buckle to pass through to meet the installation requirements.
[0070] Based on the arrangement structure of the limiting retaining buckle at the center of the width of the front end of the armature, the side folding edge of the limiting retaining buckle has no value and needs to be removed, and only the front retaining post and the top side folding edge of the L-shaped fit are retained.
[0071] If the front retaining post of the limiting retaining buckle is only at the front end of the armature, the constraint and limiting effect on the front end of the armature in the left-right direction will be lost. To ensure the left-right limitation of the front end of the armature, a U-shaped positioning notch similar to the rear end can be formed at the front end of the armature, so that the front retaining post of the limiting retaining buckle can be inserted into it with an allowable clearance fit structure.
[0072] Embodiment 6
[0073] Other contents of this embodiment are the same as those of Embodiment 1, and the differences are as follows:
[0074] In the design of the mating structure between the housing and the bobbin holder, sufficient mating clearance is ensured between the inside of the housing and the outer side area of the contact side baffle of the bobbin holder, and there is no need to form a contact mating relief groove on the inner wall of the housing, and it can be directly formed in a relatively flat structure.
[0075] Embodiment 7
[0076] Other contents of this embodiment are the same as those of Embodiment 1, and the differences are as follows:
[0077] Remove the limiting retaining buckle structure on the outer side of the contact side baffle of the bobbin holder;
[0078] The restraint and limit of the front end of the armature are achieved by forming a rib structure on the top of the housing similar to that disclosed in the prior art. When the housing is assembled in place, the rib in the housing and the front end of the armature are in clearance fit. Of course, this embodiment can only achieve the restraint and limit of the front end of the armature in the up-and-down direction, and cannot achieve the restraint and limit in the front-and-back direction and the left-and-right direction. If it is desired to achieve the restraint and limit of the armature in the front-and-back direction and the left-and-right direction, different rib heights need to be designed on the housing, which will inevitably increase the design technical difficulty and affect the assembly accuracy.
[0079] Embodiment 8
[0080] Other contents of this embodiment are the same as those of Embodiment 1, and the differences are as follows:
[0081] The bottom edge of the side-folded edge of the limit retaining buckle is integrally formed with the contact side baffle of the coil bobbin, that is, the mating gap between the bottom edge of the side-folded edge and the contact side baffle is removed.
[0082] Although this embodiment can achieve the technical purpose, it will correspondingly increase the technical difficulty of process testing.
[0083] The above embodiments are only used to illustrate the present invention, rather than to limit it.
[0084] Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that they can still modify the above embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the present invention.
Claims
1. A drop-resistant electromagnetic relay, comprising an I-shaped coil frame (1), and a yoke (2) and a housing (3) mounted on the coil frame (1); The blade edge of the yoke (2) is equipped with a reversible armature (4) via a movable spring (5); Features: A movable spring clearance notch (51) exposing a corresponding area of the armature (4) is provided on the movable spring sheet (5) at the cutting edge of the yoke (2); A first boss (31) is formed in a protrusion inside the shell (3) and can pass through the movable spring clearance notch (51); when the shell (3) is assembled in place on the coil frame (1), the first boss (31) in the shell (3) passes through the movable spring clearance notch (51) and abuts against the blade of the yoke (2).
2. The drop-resistant electromagnetic relay according to claim 1, characterized in that: The armature (4) has an armature positioning notch (41) at the cutting edge of the yoke (2) within the coverage range of the movable spring clearance notch (51); When the housing (3) is assembled in place on the coil frame (1), the first boss (31) in the housing (3) passes through the movable spring clearance notch (51) and is inserted into the armature positioning notch (41) to abut against the yoke (2); The first boss (31) of the housing (3) and the armature (4) are clearance-fitted, and the clearance size of the clearance-fitted allows the armature (4) to perform a flipping action according to design requirements.
3. The drop-resistant electromagnetic relay according to claim 1 or 2, characterized in that: The first boss (31) in the housing (3) is a step structure, and when the housing (3) is assembled in place on the coil frame (1), the first boss (31) has a limiting surface (311) extending to the top side of the armature (4); When the housing (3) is assembled in place on the coil frame (1), a clearance fit is formed between the limiting surface (311) of the first boss (31) and the armature (4), and the clearance fit has a clearance size that allows the armature (4) to perform a flipping action according to design requirements.
4. The drop-resistant electromagnetic relay according to claim 1 or 2, characterized in that: The housing (3) is also provided with a second boss (32) protruding in front of the left side of the first boss (31) and / or a third boss (33) protruding in front of the right side; When the housing (3) is assembled in place on the coil frame (1), the second boss (32) and / or the third boss (33) in the housing (3) abuts against the contact side baffle (13) of the coil frame (1).
5. The drop-resistant electromagnetic relay according to claim 1, characterized in that: On the contact side baffle plate (13) of the coil frame (1), corresponding to the front end of the armature (4) away from the yoke (2), a limit stop buckle (15) capable of restraining and limiting the armature (4) is formed in a protruding manner; The limit stop buckle (15) and the armature (4) are clearance-matched, and the clearance size of the clearance-matching allows the armature (4) to perform a flipping action according to design requirements.
6. The drop-resistant electromagnetic relay according to claim 5, characterized in that: The limit stop buckles (15) on the contact side baffle plate (13) are two groups arranged at a distance and correspondingly formed at the two side corners of the front end of the armature (4).
7. The drop-resistant electromagnetic relay according to claim 5 or 6, characterized in that: The limit stop buckle (15) comprises a front stop column (151) located at the front end of the armature (4), and a top folded edge (152) folded back on the front stop column (151) to the top side of the armature (4), the top folded edge (152) and the front stop column (151) being matched in an L-shaped structure.
8. The drop-resistant electromagnetic relay according to claim 7, characterized in that: The limit stop buckle (15) also has a side folded edge (153) folded back on the front stop column (151) to the left / right side edge of the armature (4), and the side folded edge (153) cooperates with the front stop column (151) in an L-shaped structure.
9. The drop-resistant electromagnetic relay according to claim 8, characterized in that: The side folded edge (153) of the limit stop buckle (15) is folded downward at the corresponding edge of the top folded edge (152), the side folded edge (153) and the top folded edge (152) are matched in an L-shaped structure, and the bottom edge of the side folded edge (153) is matched with the contact side baffle (13) at a distance.
10. The drop-resistant electromagnetic relay according to claim 1, characterized in that: A contact matching clearance groove (34) with a concave structure is provided in an area corresponding to the contact matching position in the housing (3).