A U-shaped spring fixing piece of a balanced force sealed relay and a balanced force sealed relay

Abstract

The present invention relates to a U-shaped spring fixing piece for a balanced force sealed relay and a balanced force sealed relay, wherein the U-shaped spring fixing piece includes a sheet-shaped body having a slot matched with two clamping portions at the lower portion of the U-shaped spring and a welding portion for welding a conversion foot. The slot is located at one end of the body, and the length direction of the slot is arranged along a first direction. The welding portion is arranged perpendicularly on the body, and the length direction of the welding portion is arranged along a second direction, which is arranged perpendicular to the first direction, so that a welding surface perpendicular to the slot is formed on the welding portion, thereby solving the problem that the position and size of the slot in the X direction of the existing U-shaped spring fixing piece cannot meet product requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic relay manufacturing, in particular to a U-shaped spring fixing piece of a balanced force sealed relay and the balanced force sealed relay. Background Art

[0002] Balanced force sealed relays have excellent environmental resistance and mechanical properties because they have the same armature holding force and contact pressure in both energized and de-energized states. They are widely used in the aerospace field.

[0003] There is a structure of a balanced force sealed relay as shown in the patent with announcement number CN201319355Y. Figure 1 Since the armature structure on its magnetic circuit system is a seesaw structure that rotates around the axis, the connection between the conversion foot on the contact system and the moving spring on the armature structure generally adopts a U-shaped spring to achieve a soft connection. While ensuring good contact conditions, there will be no obvious obstruction to the rotation process of the armature assembly.

[0004] The structure of the existing U-shaped spring fixing piece is as shown in the attached patent with the announcement number CN201319355Y. Figure 2 As shown, the U-shaped spring fixing plate has a terminal groove for fixing the U-shaped spring and a flange for welding the conversion foot. Since the terminal groove and flange of the existing U-shaped spring fixing plate are assembled in the same direction, the position and size of the terminal groove of the U-shaped spring fixing plate on the existing contact system in the assembly direction cannot be guaranteed by relying on direct positioning of the tooling. The position and size of the terminal groove of the U-shaped spring fixing plate in the assembly direction are affected by multiple factors: the position of the conversion lead-out pin, the accuracy of the U-shaped spring fixing plate itself, and the welding penetration of the U-shaped spring fixing plate. Among them, the lead-out pin position and the welding penetration of the U-shaped spring fixing plate are difficult to control during the production process, which can easily cause the position and size of the terminal groove of the U-shaped spring fixing plate in the assembly direction to fail to meet the product requirements. Due to the poor welding size of the U-shaped spring fixing plate, the product may easily suffer from problems such as interference between the U-shaped spring and the rivet, and pressure breakdown between the U-shaped spring and the coil lead-out pin.

[0005] In addition, after the U-shaped spring fixing plate of the patent with announcement number CN201319355Y is welded and fixed, the top of the conversion foot will extend into the deformation space of the U-shaped spring, which will interfere with the deformation of the U-shaped spring, which will affect the rotation of the armature structure around the axis and ultimately affect the triggering accuracy of the sealed relay. Summary of the Invention

[0006] The present invention aims to provide a U-shaped spring fixing piece to solve the problem that the position and size of the clamping slot of the existing U-shaped spring fixing piece in the X direction cannot meet product requirements.

[0007] The specific plan is as follows:

[0008] A U-shaped spring fixing plate includes a sheet-like body, the body having a slot matched with two clamping parts at the lower part of the U-shaped spring and a welding part for welding a conversion foot, the slot being located at one end of the body, the length direction of the slot being arranged along a first direction, the welding part being arranged perpendicularly on the body, the length direction of the welding part being arranged along a second direction, the second direction being arranged perpendicularly to the first direction so that a welding surface perpendicular to the slot is formed on the welding part.

[0009] In some embodiments, the welding portion is formed by bending the body.

[0010] In some embodiments, the main body has a bending process groove arranged along the first direction, and the bending process groove is located between the welding portion and the clamping groove.

[0011] In some embodiments, the bending process groove is a U-shaped groove structure with a narrow bottom and a wide mouth.

[0012] In some embodiments, the slot includes two snap-fitting portions matched with the two snap-fitting portions at the lower portion of the U-shaped spring and a U-shaped groove connecting the two snap-fitting portions, and the U-shaped groove extends along the first direction.

[0013] In some embodiments, the U-shaped groove is a groove-shaped structure with a narrow bottom and a wide mouth.

[0014] In some embodiments, a pin clearance groove for the conversion pin to pass through is further provided on the middle portion of the body opposite to the welding portion.

[0015] The present invention also provides a balanced force sealed relay, which includes a magnetic circuit system, a contact system, and a U-shaped spring connecting the magnetic circuit system and the contact system. One end of the U-shaped spring is fixedly assembled on the U-shaped spring fixing plate of the contact system, and the other end contacts the moving spring plate of the magnetic circuit system to achieve circuit conduction, wherein the U-shaped spring fixing plate is any of the above-mentioned U-shaped spring fixing plates.

[0016] The U-shaped spring fixing plate provided by the present invention has the following advantages compared with the prior art: the welding direction of the U-shaped spring fixing plate provided by the present invention selects the Z direction with low dimensional accuracy requirements, thereby avoiding the influence of the lead-out pin position and the welding penetration depth of the U-shaped spring fixing plate on the X-direction position size of the card slot, and the X-direction position size of the card slot can be directly positioned by the tooling, effectively ensuring the product's assembly accuracy requirements for the U-shaped spring fixing plate, and avoiding problems such as interference between the U-shaped spring and the rivet, and pressure breakdown of the U-shaped spring and the coil lead-out pin caused by poor welding dimensions of the U-shaped spring fixing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a balanced force sealed relay according to the present invention is shown.

[0018] Figure 2 A three-dimensional schematic diagram of a U-shaped spring fixing piece of a balanced force sealed relay of the present invention is shown.

[0019] Figure 3 A schematic diagram showing the welding of the U-shaped spring fixing piece of the balanced force sealed relay of the present invention is shown.

[0020] Figure 4 A schematic diagram showing the installation of a U-shaped spring fixing piece of the balanced force sealed relay of the present invention on a contact system is shown.

[0021] Figure 5 The diagram shows a front view of a U-shaped spring fixing piece of a balanced force sealed relay according to the present invention.

[0022] Figure 6 A top view of a U-shaped spring fixing piece of a balanced force sealed relay according to the present invention is shown. DETAILED DESCRIPTION

[0023] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0024] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-6 As shown, this specific embodiment provides a balanced force sealed relay, which includes a magnetic circuit system 1, a contact system 2, and a U-shaped spring 30 connecting the magnetic circuit system 1 and the contact system 2.

[0026] The armature on the magnetic circuit system 1 is a seesaw-like structure that rotates about an axis. The bottom of the movable spring 10 on the armature has a support 11 that contacts the U-shaped spring 30. The top of the switching foot 20 on the contact system 2 has a U-shaped spring fixing piece 21 for fixing the U-shaped spring 30. It should be noted that the magnetic circuit system 1 and contact system 2 shown in this specific embodiment are merely examples and are not limited thereto. Other magnetic circuit systems 1 and contact systems 2 known in the art can be substituted.

[0027] The balanced-force sealed relay provided in this embodiment differs from prior art balanced-force sealed relays in the assembly method and structure of the U-shaped spring stator 21. Specifically, the U-shaped spring stator comprises a sheet-like body 21 with slots 210 configured to mate with two engaging portions at the bottom of the U-shaped spring, and a welding portion 211 for welding the switching pin.

[0028] For ease of explanation, Figure 2-Figure 6 Using the coordinate axes and orientations in the figure as reference directions, the slot 210 is located at the right end of the body, with its length oriented along the Z direction, i.e., the Z direction being the first direction. The welding portion 211 is formed by bending the upper end of the body 21 in the Y direction, such that the length of the welding portion 211 is oriented along the X direction, i.e., the X direction being the second direction. This results in the welding portion 211 forming a welding surface 2110 perpendicular to the slot 210. Therefore, when welding the conversion pin, the upper and lower electrodes 40 and 41 are welded along the Y direction (balanced force sealed relays require lower dimensional accuracy of the U-shaped spring fixing piece in the Z direction). Therefore, the X-direction positional dimensions of the slot 210 of the U-shaped spring fixing piece are not affected by welding. Therefore, the X-direction positional dimensions of the slot 210 can be directly positioned and guaranteed by the tooling, avoiding the influence of the lead pin position and the weld penetration of the U-shaped spring fixing piece. This ensures that the X-direction precision of the slot 210 meets product requirements, thereby ensuring product quality.

[0029] The welding direction of the U-shaped spring fixing plate provided by the present invention is selected in the Z direction, which has low dimensional accuracy requirements. This avoids the influence of the lead pin position and the weld penetration depth of the U-shaped spring fixing plate on the X-direction position and dimensions of the slot 210. The X-direction position and dimensions of the slot 210 can be directly positioned by the tooling, effectively ensuring the product's assembly precision requirements for the U-shaped spring fixing plate. This avoids problems such as interference between the U-shaped spring and rivets, and pressure breakdown between the U-shaped spring and the coil lead pins caused by poor weld dimensions of the U-shaped spring fixing plate. Furthermore, because the weld portion 211 is formed by bending the upper side end of the body 21 in the Y direction, after the U-shaped spring is assembled on the U-shaped spring fixing plate, the conversion pin welded to the weld portion 211 will not affect the deformation of the U-shaped spring, ensuring that the U-shaped spring will not interfere with the armature structure's axial rotation.

[0030] In some embodiments, reference Figure 2 and Figure 5 In addition to two bayonet holes 2100 that match the two clamping parts at the bottom of the U-shaped spring, the slot 210 also includes a U-shaped groove 2101 connecting the two bayonet holes 2100. The U-shaped groove 2101 connects the two bayonet holes 2100 along the Z direction. The U-shaped groove 2101 allows the bottom of the U-shaped spring to extend into the U-shaped groove 2101, limiting the activity space of the U-shaped spring and improving the consistency of the size of the U-shaped spring after assembly.

[0031] Preferably, the U-shaped groove 2101 is designed to have a narrow bottom and a wide mouth. The narrow bottom can reduce the movable space of the U-shaped spring and further improve the dimensional consistency of the U-shaped spring after assembly; the wide mouth can improve the life of the mold punch.

[0032] In some embodiments, reference Figure 2and Figure 6 The main body 21 has a bending process groove 213 arranged along the Z direction. The bending process groove 213 is located between the welding part 211 and the card slot 210, so that the welding part 211 is bent with the bending process groove 213 as the boundary, ensuring the bending quality of the welding part 211.

[0033] Preferably, the bending process groove 213 is designed to have a narrow bottom and a wide mouth. This structure can reduce the difficulty of designing the bending mold and increase the life of the mold punch.

[0034] In some embodiments, reference Figure 2 and Figure 6 The main body 21 also has a pin clearance groove 212 for the conversion pin to pass through on the middle part opposite to the welding part 211. The pin clearance groove 212 is located in the middle of the main body 21, so that the conversion pin can pass through the middle part of the main body 21, which can fully reduce the size of the U-shaped spring fixing plate, thereby making the size of the balanced force sealed relay smaller.

[0035] Preferably, the pin-out slot 212 is located on the side of the body 21 away from the card slot 210. After the conversion pin 20 passes through the pin-out slot 212, Figure 1 When the U-shaped spring is assembled on the U-shaped spring fixing plate, the bottom of the arc connection of the U-shaped spring is located on the side away from the welding portion 211, and the conversion foot 20 is located on the side outside the open end of the U-shaped spring. Therefore, the conversion foot 20 will not interfere with the deformation of the U-shaped spring, providing a larger deformation space for the U-shaped spring, ensuring that the U-shaped spring will not interfere with the rotation of the armature structure around the axis; and the flange (i.e., the welding portion) in CN201319355Y is located in the middle of the body. Therefore, after the conversion foot is welded to the flange, the top of the conversion foot extends into the U-shaped spring, occupying the deformation space of the U-shaped spring, so that the top of the conversion foot has the problem of interfering with the rotation of the armature structure around the axis, thereby affecting the rotation of the armature structure.

[0036] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A U-shaped spring fixing piece, characterized by: The U-shaped spring has two clips that are matched with the two clips at the bottom of the U-shaped spring, and a welding part for welding the conversion foot. The clip is located at one end of the body, and the length direction of the clip is arranged along the first direction. The welding part is arranged perpendicularly on the body, and the length direction of the welding part is arranged along the second direction. The second direction is arranged perpendicular to the first direction so that a welding surface perpendicular to the clip is formed on the welding part; the clip includes two clips that are matched with the two clips at the bottom of the U-shaped spring and a U-shaped groove connecting the two clips, the U-shaped groove extends along the first direction, and the U-shaped groove is a groove structure with a narrow bottom and a wide mouth; the welding part is formed by bending the body; the body has a bending process groove arranged along the first direction, and the bending process groove is located between the welding part and the clip; the middle part of the body opposite to the welding part also has a pin clearance groove for the conversion foot to pass through; the pin clearance groove is located on the side of the body away from the clip.

2. The U-shaped spring fixing piece according to claim 1, characterized in that: The bending process groove is a U-shaped groove structure with a narrow bottom and a wide mouth.

3. A balanced force sealed relay comprising a magnetic circuit system, a contact system, and a U-shaped spring connecting the magnetic circuit system and the contact system, wherein one end of the U-shaped spring is fixedly mounted on the U-shaped spring fixing plate of the contact system, and the other end contacts the moving spring of the magnetic circuit system to achieve circuit conduction, characterized in that: The U-shaped spring fixing piece is the U-shaped spring fixing piece described in any one of claims 1-2.

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