Anti-falling relay

Abstract

The utility model discloses an anti-falling relay, which comprises a shell, a contact system and a positioning sheet, the contact system comprises a static reed provided with a static contact and a movable reed provided with a movable contact, and the static contact and the movable contact are correspondingly arranged; the positioning sheet comprises a fixed part and a free end, the fixed part is fixedly arranged relative to the static reed, the free end extends to one side, opposite to the static contact, of the movable reed, and one side, far away from the movable reed, of the free end and the shell are adjacently arranged at an interval; the free end of the positioning sheet is provided with a projection projecting towards the direction of the housing at one side far away from the movable contact, and the projection is in clearance fit with the housing. According to the utility model, the back-and-forth swing of the positioning sheet and the release springback can be reduced, and the anti-falling capability of the relay is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of relays, and specifically relates to a drop-resistant relay. Background Art

[0002] A relay is an electronic control device. It has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied to an automatic control circuit. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] In an electromagnetic relay of the prior art, the axis of the iron core hole of the coil bobbin is arranged vertically, the pole face of the iron core is arranged at the upper end of the coil bobbin, the armature in the moving reed armature assembly is fitted above the pole face of the iron core, the moving reed is usually bent into an L shape, one side of the L shape of the moving reed is fixed to the armature, a moving contact is installed at a position near the end of one side of the L shape of the moving reed, and the other side of the L shape of the moving reed is fixed to the yoke iron. When the coil is energized, the armature moves towards the pole face of the iron core and drives the moving contact of the moving reed to move until it contacts the normally open static contact at the corresponding position of the moving contact and realizes overtravel. Since the moving reed armature assembly pats towards the direction of the coil bobbin, the static reed is usually installed in the extension part extending from the upper flange of the coil bobbin to the side. For this type of clapper-type electromagnetic relay, due to the lack of restriction on the moving reed, a positioning piece is usually set to solve the problems of uncontrollable contact gap and operating voltage. The positioning piece is usually also installed on the extension part of the upper flange of the coil bobbin and is located above the static contact. The moving reed corresponding to the position of the moving contact is located between the static contact and the positioning piece. When the coil is not energized, this part of the moving reed leans towards the positioning piece. During actual use, the side of the positioning piece away from this part of the moving reed is a relay structure that is spaced from and fixed to the positioning piece; for example, the side of the positioning piece away from the moving contact of the moving reed is a housing, a base, etc. that are spaced from and fixed to the positioning piece. During the use, transportation, etc. of the relay, problems such as dropping and collision often occur. For example, relays are increasingly used in sockets and vehicles, etc. In these application scenarios, the socket often falls to the ground when dropped. For another example, during the transportation and handling of the relay, the transportation tool will inevitably jolt. When the relay drops or is impacted by the external environment, the positioning piece itself is vibrated or the moving contact part of the moving reed swings reversely to contact the free end of the positioning piece, which will cause the positioning piece to deform and swing towards the housing. Since there is a spacing distance between the free end of the positioning piece and the fixed structure such as the relative housing, there is a large deformation space. The excessive swing of the positioning piece may cause plastic deformation or even brittle cracking of the wire frame, resulting in the positioning piece being unable to return to its normal position, and then causing the contact gap to become larger and the relay to be unable to conduct normally. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide, in view of the deficiencies of the prior art, an anti-drop relay that can reduce the back-and-forth swing and plastic deformation of the positioning piece when the relay drops or is impacted by the external environment.

[0005] The technical object of the present utility model is achieved by the following technical solutions:

[0006] An anti-drop relay includes a housing, a contact system, and a positioning piece; the contact system includes a static reed with a static contact and a moving reed with a moving contact, and the static contact and the moving contact are arranged corresponding to each other; the positioning piece includes a fixed part and a free end, the fixed part is fixedly arranged relative to the static reed, the free end extends to the side of the moving reed facing away from the static contact, and there is an adjacent interval between the side of the free end away from the moving reed and the housing; a convex bump protruding towards the housing is provided on the side of the free end of the positioning piece away from the moving contact, and a clearance fit is formed between the convex bump and the housing.

[0007] Further, it also includes a bobbin, an iron core, and an armature; the iron core is installed in the iron core hole of the bobbin, and the pole face of the iron core is located at the top of the bobbin; the armature is fixedly connected to the moving reed and is located above the pole face of the iron core; the static reed is fixed on the bobbin, and the static contact part and the moving contact part on the static reed are arranged corresponding to each other; the fixed part of the positioning piece is fixedly arranged on the positioning boss of the bobbin, and the free end extends to the side of the moving reed facing away from the static contact.

[0008] Preferably, the convex bump is a raised structure formed by stamping the positioning piece.

[0009] Preferably, the convex bump is formed at the overhanging end of the free end away from the moving contact.

[0010] Preferably, the convex bump is a strip structure, and its extending direction is parallel to the width direction of the positioning piece.

[0011] Preferably, the positioning piece is a flat "one" - shaped structure; the fixed part of the positioning piece is inserted into the positioning boss of the bobbin; correspondingly, the positioning boss of the bobbin is provided with an installation groove for inserting the fixed part.

[0012] Preferably, along the insertion direction of the positioning piece, the fixed part is provided with a limiting notch, and the installation groove is provided with a limiting rib protruding towards the limiting notch, and an interference fit is formed between the limiting notch and the limiting rib.

[0013] Preferably, the positioning piece is a "7" - shaped structure, and the positioning piece further includes a vertical section provided at the end of the fixed part away from the free end; correspondingly, the installation groove is provided with a vertical groove for cooperating with the vertical section.

[0014] Preferably, the clearance between the convex bump and the housing is 0.1 - 0.3 mm.

[0015] Preferably, a reinforcing rib extending along the length direction is provided on the surface of the free end of the positioning piece on the side away from the moving contact.

[0016] Preferably, the reinforcing rib is composed of at least one or more convex ribs arranged at intervals in the width direction of the positioning piece, and the reinforcing rib is arranged close to the fixing portion.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. A convex bud protruding towards the housing direction is provided on the side of the free end of the positioning piece of the present utility model away from the moving contact, and a clearance fit is formed between the convex bud and the housing. By adopting this technical measure, the deformation space of the free end of the positioning piece can be limited; when the relay drops or is impacted, the positioning piece itself is vibrated or when the moving contact part of the moving reed swings reversely and contacts the free end of the positioning piece, it will cause the positioning piece to deform and swing, that is, the positioning piece swings towards the housing direction. When the swing amount exceeds the gap between the convex bud and the housing, the housing will limit the convex bud, so that the convex bud cannot swing further. At the same time, the housing absorbs the energy of the reverse swing of the positioning piece, reduces the back-and-forth swing of the positioning piece, and also reduces the risk of plastic deformation of the positioning piece. It can prevent the positioning piece from undergoing excessive plastic deformation and the wire frame from brittle cracking, ensure that the positioning piece can be normally reset, ensure the stability of the contact gap, and enable the relay to be normally conducted; thus, the anti-drop ability of the relay can be effectively improved.

[0019] 2. The present utility model further includes a coil holder, an iron core, and an armature; the iron core is installed in the iron core hole of the coil holder, and the pole face of the iron core is located at the top of the coil holder; the armature is fixedly connected to the moving reed and is located above the pole face of the iron core;

[0020] The static reed is fixed on the coil holder, and the static contact part on the static reed is arranged corresponding to the moving contact part;

[0021] The fixing portion of the positioning piece is fixedly arranged on the positioning boss of the coil holder, and the free end extends to the side of the moving reed facing away from the static contact. This relay is an anti-drop type clapper relay. Through innovative designs such as dynamic limiting of the positioning piece, layered and spaced layout, and clearance buffering of the convex bud, and through the coordination of anti-impact structure optimization and efficient magnetic circuit design of the clapper type, it is significantly superior to traditional clapper relays in terms of anti-drop impact, contact stability, and structural reliability, and is especially suitable for harsh working conditions with high vibration and high impact.

[0022] 3. The convex bract of the present utility model is a raised structure formed by stamping the positioning piece. Adopting this technical measure is simple and efficient, enabling one-piece processing and avoiding the installation of additional parts; it can reduce the complexity and cost of the production process, while ensuring the integrity of the convex bract and the positioning piece, guaranteeing the structural strength of the convex bract, making the convex bract not easily fall off during use, and ensuring the stability of its function of restricting the deformation of the positioning piece and the reliability against impact.

[0023] 4. The convex bract of the present utility model is formed at the overhanging end of the free end away from the moving contact side. Adopting this technical measure can more accurately limit the maximum deformation degree of the free end of the positioning piece, enhance the overall protection of the positioning piece, and further improve the anti-drop performance of the relay. At the same time, aiming at the problem of concentrated impact force at the end during dropping, the end support can reduce the lever effect and prevent the free end from swinging too much and causing root fracture.

[0024] 5. The convex bract of the present utility model is a strip structure, and its extending direction is parallel to the width direction of the positioning piece. Adopting this technical measure increases the contact area between the convex bract and the housing (when possible contact occurs). When the relay drops or is subjected to external impact, it can more evenly disperse the force transmitted by the positioning piece to the outer shell; the strip parallel structure provides a linear support surface to evenly disperse the impact load, making the force on the positioning piece more balanced; the extension in the width direction increases the contact area, preventing stress concentration at point contact and reducing the risk of damage caused by local stress concentration, effectively enhancing the anti-deformation ability of the positioning piece.

[0025] 6. The positioning piece of the present utility model is a flat one-piece structure; the fixing part of the positioning piece is inserted on the positioning boss of the coil bobbin; correspondingly, the positioning boss of the coil bobbin is provided with an installation groove for inserting the fixing part. The one-piece flat structure is combined with the insertion structure to simplify the assembly process. The setting of the installation groove facilitates the installation and positioning of the positioning piece, ensuring the accuracy and stability of the positioning piece installation. This simple structure uses less material than the traditional "7"-shaped positioning piece, and the simple installation method is conducive to improving production efficiency and reducing production costs.

[0026] 7. Along the insertion direction of the positioning piece, the fixing part is provided with a limiting notch, and the installation groove is provided with a limiting rib protruding towards the limiting notch, and the limiting notch and the limiting rib are in interference fit. Adopting this technical measure can effectively prevent the positioning piece from loosening or displacing due to factors such as vibration and impact during use, further enhancing the stability of the connection between the positioning piece and the coil bobbin, ensuring that the positioning piece can always maintain the correct position and posture, and the double fixing mechanism ensures the stability of the contact gap parameters.

[0027] 8. The positioning piece of the present utility model has a "7"-shaped structure, and the positioning piece further includes a vertical section provided at one end of the fixed portion away from the free end; correspondingly, the installation groove is provided with a vertical groove that cooperates with the vertical section. By adopting this technical measure, the cooperation dimension between the positioning piece and the bobbin is increased, the positioning piece is restricted from multiple directions, the anti-torsion ability is improved, the multi-direction anti-impact performance is enhanced, the stability and reliability of the installation of the positioning piece are further improved, the positioning piece is prevented from shaking or shifting in a complex use environment, and the performance stability of the relay is ensured.

[0028] 9. On the surface of the free end of the positioning piece of the present utility model on the side away from the moving contact, there is a reinforcing rib extending along its length direction. By adopting this technical measure, the longitudinal bending strength is significantly improved by the reinforcing rib in the length direction, the structural strength and rigidity of the positioning piece are effectively enhanced, the bending deformation of the positioning piece caused by the impact of the moving contact and the falling process is prevented, and the bending deformation of the positioning piece caused by the collision contact with the housing is also prevented; the occurrence probability of plastic deformation is reduced, the service life of the positioning piece and the reliability of the relay are improved. In addition, the reinforcing rib increases the rigidity of the positioning piece, that is, increases the strength of the positioning piece, can absorb the energy during the release process of the moving reed piece, and further reduces the phenomenon of the moving contact releasing and rebounding and secondary closing.

[0029] 10. The reinforcing rib of the present utility model is at least composed of one or more convex ribs arranged at intervals along the width direction of the positioning piece, and the reinforcing rib is arranged close to the fixed portion. Arranging the reinforcing rib close to the fixed portion can enhance the strength of the fixed portion of the positioning piece, so that when the positioning piece bears the impact of the moving reed piece, the force can be better transmitted from the free end to the fixed portion, improve the anti-impact ability of the positioning piece, and ensure the performance stability of the relay when it falls or is impacted. At the same time, using multiple convex ribs for the reinforcing rib can further improve the overall strength of the positioning piece. The multiple convex ribs arranged along the width direction of the positioning piece form a parallel array structure, and being arranged close to the fixed portion can effectively disperse the root stress. This layout strengthens the maximum bending moment area of the positioning piece and can prevent fatigue fracture caused by repeated impacts. Brief Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the present utility model;

[0031] Figure 2 is Figure 1 a three-dimensional view after removing the outer shell;

[0032] Figure 3 is Figure 2 the front view of

[0033] Figure 4 is the top view of the positioning piece;

[0034] Figure 5 is the side view of the positioning piece;

[0035] Figure 6 It is a schematic structural diagram of a coil bobbin;

[0036] Reference numerals: 1 - coil bobbin; 11 - base; 12 - positioning boss; 121 - mounting groove; 122 - limiting rib; 123 - vertical groove;

[0037] 2 - outer shell; 3 - iron core; 4 - coil; 5 - yoke iron; 6 - armature; 7 - static reed; 71 - static contact; 8 - moving reed; 81 - moving contact; 9 - positioning piece; 91 - fixing part; 92 - free end; 93 - convex bud; 94 - convex rib; 95 - reed contact part; 96 - limiting notch. Specific embodiments

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model generally described and illustrated in the drawings here can be arranged and designed in a variety of different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0040] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0041] Such as Figure 1 — Figure 6As shown in the figure, an anti-drop relay includes a housing, a contact system, and a positioning piece 9; the contact system includes a static reed 7 provided with a static contact 71 and a moving reed 8 provided with a moving contact 81, and the static contact 71 and the moving contact 81 are arranged corresponding to each other; the positioning piece 9 includes a fixed part 91 and a free end 92, the fixed part 91 is fixedly arranged relative to the static reed 7, the free end 92 extends to the side of the moving reed 8 facing away from the static contact 71, and there is an adjacent interval between the side of the free end 92 away from the moving reed 8 and the housing; a convex bud 93 protruding towards the housing is provided on the side of the free end 92 of the positioning piece 9 away from the moving contact 81, and a clearance fit is formed between the convex bud 93 and the housing. During actual use, the housing includes the base 11 of the relay and the outer shell 2 covering the base 11, and structures such as convex part retaining walls extending from the base 11 and the outer shell 2 are included. In this embodiment, the housing is the outer shell 2. By adopting this technical measure, the deformation space of the free end 92 of the positioning piece 9 can be limited; when the relay drops or is impacted, the parts of the positioning piece 9 itself are vibrated or when the moving contact part of the moving reed 8 swings reversely and contacts the free end 92 of the positioning piece 9, it will cause the positioning piece 9 to deform and swing, that is, the positioning piece 9 swings towards the housing direction. When the swing amount exceeds the clearance between the convex bud 93 and the housing, the outer shell 2 will limit the convex bud 93, making the convex bud 93 unable to swing more greatly. At the same time, the housing absorbs the energy of the reverse swing of the positioning piece 9, reducing the back-and-forth swing of the positioning piece 9 and also reducing the risk of plastic deformation of the positioning piece 9, preventing the positioning piece 9 from having excessive plastic deformation and the wire frame from being brittle, ensuring that the positioning piece 9 can be reset normally, ensuring the stability of the contact gap, and enabling the relay to conduct normally; thus, the anti-drop ability of the relay can be effectively improved. When the moving reed armature 6 component generates kinetic energy and potential energy during the release process and the drop process, the energy can be transmitted from the moving contact 81 to the positioning piece 9, and the positioning piece 9 will store kinetic energy and potential energy. When the energy is too large, the convex bud 93 of the positioning piece 9 will collide with the outer shell 2, and the outer shell 2 absorbs the energy of the positioning piece 9, thereby reducing the energy during the rebound process of the positioning piece 9, reducing the swing amplitude and the number of swings of the positioning piece 9, and thus reducing the swing and release rebound of the moving contact 81.

[0042] As Figure 1 — Figure 6As shown, in actual use, the relay further includes a bobbin 1, an iron core 3, and an armature 6; the iron core 3 is installed in the iron core hole of the bobbin 1, and the pole face of the iron core 3 is located at the top of the bobbin 1; the armature 6 is fixedly connected to the moving reed 8 and is located above the pole face of the iron core 3; the static reed 7 is fixed on the bobbin 1, and the static contact part and the moving contact part on the static reed 7 are arranged correspondingly; the fixed part 91 of the positioning piece 9 is fixedly arranged on the positioning boss 12 of the bobbin 1, and the free end 92 extends to the side of the moving reed 8 facing away from the static contact 71. In a specific implementation, the relay is an anti-drop snap-action relay. In this embodiment, the bobbin 1 includes a base 11 and a positioning boss 12 (upper flange). A coil 4 is provided outside the iron core 3, and a yoke 5 is also provided on the base 11. After the outer shell 2 is installed on the base 11, an adjacent interval is provided between the side of the free end 92 away from the moving reed 8 and the outer shell 2. The static contact part of the static reed 7, the moving contact part of the moving reed 8, the free end 92 of the positioning piece 9, and the outer shell 2 on the side of the free end 92 away from the moving contact 81 are arranged at intervals in the vertical direction in sequence. The free end 92 of the positioning piece 9 is provided with a convex bud 93 protruding towards the outer shell 2 on the side away from the moving reed 8, and a clearance fit is formed between the convex bud 93 and the outer shell 2. Through innovative designs such as dynamic limiting of the positioning piece 9, layered and spaced layout, and convex bud clearance buffering, and through the coordination of anti-shock structure optimization and snap-action high-efficiency magnetic circuit design, this relay is significantly superior to traditional snap-action relays in terms of anti-drop impact, contact stability, and structural reliability, and is especially suitable for harsh working conditions with high vibration and high impact.

[0043] The clearance between the convex bud 93 and the outer shell 2 is 0.1 - 0.3 mm. The clearance range of 0.1 - 0.3 mm has been verified as the optimal value through experiments: less than 0.1 mm may affect the operation flexibility, and greater than 0.3 mm will weaken the limiting effect. This clearance range can not only ensure that the positioning piece 9 has a certain movement space during normal operation, but also effectively limit the maximum deformation of the positioning piece 9 when the relay drops or is impacted, avoid excessive deformation of the positioning piece 9, and ensure the anti-drop performance of the relay and the stability of the contact clearance.

[0044] The convex bud 93 is a raised structure formed by stamping the positioning piece 9. In a specific implementation, the convex bud 93 and the positioning piece 9 can adopt independent structures and be combined together by welding, clamping, etc. The convex bud 93 is a raised structure formed by stamping the positioning piece 9. This processing method is simple and efficient, can realize integral processing, avoid the installation of additional parts; can reduce the complexity and cost of the production process, and at the same time ensure the integrity of the convex bud 93 and the positioning piece 9, can ensure the structural strength of the convex bud 93, make the convex bud 93 not easy to fall off during use, and ensure the stability of its function of restricting the deformation of the positioning piece 9 and the anti-shock reliability.

[0045] As Figure 1 — Figure 5As shown, the convex burr 93 is formed at the overhanging end of the free end 92 on the side away from the moving contact 81. In this embodiment, the free end 92 corresponds to the moving contact 81, and a reed contact portion 95 is provided on the side of the free end 92 facing the moving reed 8, that is, the free end 92 corresponds to the moving contact 81, and the reed contact portion 95 is provided on the lower side of the free end 92. The side of the free end 92 away from the moving contact 81 is the upper side of the free end 92; the convex burr 93 is formed at the overhanging end of the upper side of the free end 92. The convex burr 93 is formed at the overhanging end of the free end 92 on the side away from the moving contact 81, and this position is the part where the free end 92 of the positioning piece 9 is most likely to deform when subjected to dropping vibration or impact by the moving reed 8. Arranging the convex burr 93 at the overhanging end (the most easily deformable area) can maximize the limitation of the displacement amplitude. Arranging the convex burr 93 at this position can more accurately limit the maximum deformation degree of the free end 92 of the positioning piece 9, enhance the protection effect on the overall positioning piece 9, and further improve the anti-drop performance of the relay. At the same time, aiming at the problem of concentrated impact force at the end during dropping, the end support can reduce the lever effect and prevent the free end 92 from swinging too much and causing root fracture.

[0046] As Figure 2 , Figure 3 , Figure 4 , Figure 5 shown, the convex burr 93 is a strip structure, and its extending direction is parallel to the width direction of the positioning piece 9. In this embodiment, the convex burr 93 is formed in the middle of the overhanging end of the upper side of the free end 92, and its extending direction is parallel to the width direction of the positioning piece 9. By adopting this technical measure, the contact area between the convex burr 93 and the housing 2 is increased (when possible contact occurs). When the relay drops or is subjected to external impact, the force transmitted from the positioning piece 9 to the housing 2 by the impact can be more evenly dispersed; the strip parallel structure provides a linear support surface to evenly disperse the impact load, making the force on the positioning piece 9 more balanced; the extension in the width direction increases the contact area, prevents stress concentration at the point contact, and reduces the risk of damage caused by local stress concentration, effectively improving the anti-deformation ability of the positioning piece 9.

[0047] As Figure 1 — Figure 6 shown, the positioning piece 9 is a flat strip structure; the fixing portion 91 of the positioning piece 9 is inserted on the positioning boss 12 of the bobbin 1; correspondingly, the positioning boss 12 of the bobbin 1 is provided with an installation groove 121 for inserting the fixing portion 91.

[0048] In this embodiment, the positioning boss 12 (upper flange) of the bobbin 1 is provided with an installation groove 121 for cooperating with the fixing part 91. The installation groove 121 and the moving contact part of the moving reed 8 are arranged at an upper and lower interval and offset; after the fixing part 91 is installed in the installation groove 121, the free end 92 extends to the side of the moving reed 8 facing away from the static contact 71, that is, extends to the area above the corresponding moving contact 81, so as to complete the installation of the positioning piece 9. The adoption of the flat sheet structure of the straight type and the insertion structure simplifies the assembly process. The setting of the installation groove 121 facilitates the installation and positioning of the positioning piece 9, and ensures the accuracy and stability of the installation of the positioning piece 9. This simple structure uses less material than the traditional "7"-shaped positioning piece 9, and the simple installation method is conducive to improving production efficiency and reducing production costs.

[0049] As Figure 4 、 Figure 6 shown, along the insertion direction of the positioning piece 9, the fixing part 91 is provided with a limiting notch 96, and the installation groove 121 is provided with a limiting rib 122 protruding towards the limiting notch 96, and the limiting notch 96 and the limiting rib 122 are in interference fit. In this embodiment, the limiting notch 96 is of a U-shaped structure, and the limiting rib 122 is a strip-shaped structure in interference fit with the limiting notch 96. The opening of the limiting notch 96 is in an eight-shaped; the insertion end of the limiting rib 122 is provided with a guiding inclined surface for cooperating with the opening of the limiting notch 96. Adopting this structure can play a guiding role during insertion. The interference fit between the limiting notch 96 of the fixing part 91 and the limiting rib 122 in the installation groove 121 can effectively prevent the positioning piece 9 from loosening or displacing due to factors such as vibration and impact during use, further enhancing the stability of the connection between the positioning piece 9 and the bobbin 1, ensuring that the positioning piece 9 can always maintain the correct position and posture, and the double fixing mechanism ensures the stability of the contact gap parameter.

[0050] The positioning piece 9 is of a "7"-shaped structure, and the positioning piece 9 further includes a vertical section arranged at the end of the fixing part 91 away from the free end 92; correspondingly, the installation groove 121 is provided with a vertical groove 123 for cooperating with the vertical section. Adopting this technical measure increases the cooperation dimension between the positioning piece 9 and the bobbin 1, restrains the positioning piece 9 from multiple directions, improves the anti-torsion ability, enhances the multi-directional anti-impact performance, further improves the stability and reliability of the installation of the positioning piece 9, prevents the positioning piece 9 from shaking or displacing in a complex use environment, and ensures the stable performance of the relay.

[0051] As Figure 4 、 Figure 5As shown, on the surface of the free end 92 of the positioning piece 9 on the side away from the moving contact 81, there are reinforcing ribs extending along its length direction. In specific implementation, the reinforcing ribs can adopt a convex rib structure. By adopting this technical measure, the reinforcing ribs in the length direction significantly improve the longitudinal bending strength, effectively enhance the structural strength and stiffness of the positioning piece 9, and prevent the bending deformation of the positioning piece 9 caused by the impact of the moving contact 81; reduce the occurrence probability of plastic deformation, improve the service life of the positioning piece 9 and the reliability of the relay. In addition, the reinforcing ribs increase the rigidity of the positioning piece 9, that is, increase the strength of the positioning piece 9, and can also absorb the energy during the release process of the moving reed 8, further reducing the release rebound and secondary connection phenomena of the moving contact 81.

[0052] As Figure 4 , Figure 5 shown, the reinforcing ribs are at least composed of one or more convex ribs 94 arranged at intervals in the width direction of the positioning piece 9, and the reinforcing ribs are arranged close to the fixing part 91. In this embodiment, the reinforcing rib is composed of a single convex rib 94, which is arranged close to the fixing part 91. In actual use, the number of convex ribs 94 can be increased according to requirements. For example, the reinforcing rib is composed of two convex ribs 94 arranged at intervals in the width direction of the positioning piece 9. Arranging the reinforcing ribs close to the fixing part 91 can enhance the strength of the fixing part 91 of the positioning piece 9, so that when the positioning piece 9 bears the impact of the moving reed 8, the force can be better transmitted from the free end 92 to the fixing part 91, improving the impact resistance of the positioning piece 9 and ensuring the stable performance of the relay during dropping or being impacted. At the same time, using multiple convex ribs 94 as the reinforcing ribs can further improve the overall strength of the positioning piece 9. The multiple convex ribs 94 arranged in the width direction of the positioning piece 9 form a parallel array structure, and arranging them close to the fixing part 91 can effectively disperse the root stress. This layout strengthens the maximum bending moment area of the positioning piece 9 and can prevent fatigue fracture caused by repeated impacts.

[0053] The technical solutions provided by the embodiments of the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A drop-resistant relay, comprising a housing, a contact system and a positioning piece; the contact system comprises a static reed piece provided with a static contact and a dynamic reed piece provided with a dynamic contact, the static contact and the dynamic contact being arranged correspondingly; The positioning piece includes a fixed portion and a free end, the fixed portion is fixedly arranged relative to the static spring piece, the free end extends to the side of the dynamic spring piece facing away from the static contact, and the free end is arranged adjacent to the housing at a distance away from the side of the dynamic spring piece; Features: The free end of the positioning piece is provided with a convex burl protruding toward the housing on a side away from the moving contact, and a clearance fit is formed between the convex burl and the housing.

2. The drop-resistant relay according to claim 1, characterized in that: Also includes a coil frame, an iron core, and an armature; The iron core is installed in the iron core hole of the coil frame, and the pole surface of the iron core is located at the top of the coil frame; The armature is fixedly connected to the moving spring and is located above the pole surface of the iron core; The static spring piece is fixed on the coil frame, and the static contact part and the moving contact part on the static spring piece are arranged correspondingly; The fixing portion of the positioning sheet is fixedly arranged on the positioning boss of the coil frame, and the free end extends to the side of the moving spring sheet facing away from the static contact.

3. The drop-resistant relay according to claim 1, characterized in that: The convex bract is a protruding structure formed by punching the positioning sheet.

4. The drop-resistant relay according to claim 1 or 3, characterized in that: The convex bulge is formed at the overhanging end of the free end away from the moving contact.

5. The drop-resistant relay according to claim 4, characterized in that: The convex bract is a strip-shaped structure, and its extending direction is parallel to the width direction of the positioning piece.

6. The drop-resistant relay according to claim 2, characterized in that: The positioning piece is a straight-line flat piece structure; The fixing portion of the positioning sheet is inserted into the positioning boss of the coil frame; Correspondingly, the positioning boss of the coil frame is provided with a mounting groove for inserting the fixing part.

7. The drop-resistant relay according to claim 6, characterized in that: Along the insertion direction of the positioning piece, the fixing portion is provided with a limiting notch, and the mounting groove is provided with a limiting convex rib protruding toward the limiting notch, and the limiting notch and the limiting convex rib are interference fit.

8. The drop-resistant relay according to claim 6 or 7, characterized in that: The positioning piece is a "7"-shaped structure, and the positioning piece also includes a vertical section arranged at an end of the fixing portion away from the free end; correspondingly, the mounting groove is provided with a vertical groove that cooperates with the vertical section.

9. The drop-resistant relay according to claim 1, characterized in that: The gap between the convex bract and the shell is 0.1-0.3 mm.

10. The drop-resistant relay according to claim 1, characterized in that: A reinforcing rib extending along the length direction of the free end of the positioning piece is provided on a surface of the side away from the moving contact.

11. The drop-resistant relay according to claim 10, characterized in that: The reinforcing ribs are composed of at least one or more convex ribs arranged at intervals along the width direction of the positioning piece, and the reinforcing ribs are arranged close to the fixing portion.

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