Terminal contact spring and switch

Abstract

This disclosure discloses a terminal contact spring and a switch, belonging to the field of electrical structures. The terminal contact spring includes: a contact segment, a connecting segment, a first constraint segment, and a second constraint segment connected in sequence. The contact segment is located on one side of the connecting segment, and the first and second constraint segments are located on the other side of the connecting segment. The side of the contact segment facing away from the connecting segment has a contact. The first constraint segment can constrain its own displacement in a first direction, and the second constraint segment can constrain its own displacement in a second direction. The first and second directions are located in the same plane and form an angle between them. The plane containing the first and second directions is parallel to the plane containing the elastic deformation trajectory of the contact segment. This disclosure can reduce arc erosion, ensure conductivity, and reduce safety hazards.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the field of electrical structure, and particularly relates to a terminal contact spring and a switch. BACKGROUND

[0002] Switches are common electrical devices used to control the on-off of circuits.

[0003] In the related art, a switch mainly comprises a button, a rocker, a moving contact and a stationary contact. When a user actuates the button, the rocker swings, thereby driving the moving contact at the end of the rocker to move and hit the stationary contact, so that the moving contact and the stationary contact are in contact, and the circuit is turned on.

[0004] However, in the process of the moving contact hitting the stationary contact, a small amplitude bounce occurs between the moving contact and the stationary contact, so that the current between the moving contact and the stationary contact breaks through the air to form a pull arc, thereby releasing high-temperature ablation of the stationary contact and the moving contact, and further causing the formation of an oxide layer on the moving contact and the stationary contact. In this way, not only the conductivity is affected, but also a safety hazard of fire occurs. SUMMARY

[0005] Embodiments of the present disclosure provide a terminal contact spring and a switch, which can reduce pull arc ablation, ensure conductivity, and reduce safety hazards. The technical solutions are as follows:

[0006] In a first aspect, the embodiments of the present disclosure provide a terminal contact spring, comprising: a contact section, a connecting section, a first constraint section and a second constraint section connected in sequence, the contact section is located on one side of the connecting section, and the first constraint section and the second constraint section are located on the other side of the connecting section;

[0007] One side of the contact section away from the connecting section has a contact head;

[0008] The first constraint section can constrain its displacement in a first direction, the second constraint section can constrain its displacement in a second direction, the first direction and the second direction are located in the same plane and have an included angle therebetween, and the plane in which the first direction and the second direction are located is parallel to the plane in which the elastic deformation track of the contact section is located.

[0009] In an implementation manner of the present disclosure, the first constraint section comprises a first main plate and at least two first wing plates;

[0010] The at least two first wing plates are respectively located on opposite sides of the length direction of the first main plate, and the first wing plates and the first main plate are located in the same plane;

[0011] One end of the length direction of the first main plate is connected with the connecting section, and the other end of the length direction of the first main plate is connected with the second constraint section.

[0012] In an implementation form of the second aspect, the second constraint section comprises a second main plate and at least two second wing plates.

[0013] The at least two second wing plates are respectively located on opposite sides of the second main plate in the length direction of the second main plate, and the second wing plates and the second main plate are located in the same plane.

[0014] One end of the second main plate in the length direction is connected to the first constraint section.

[0015] In an implementation form of the second aspect, the first wing plate and the second wing plate are perpendicular to each other.

[0016] The first direction is perpendicular to the first wing plate, and the second direction is perpendicular to the second wing plate.

[0017] In an implementation form of the second aspect, the second constraint section is located on the side of the first constraint section away from the contact section.

[0018] In an implementation form of the second aspect, the terminal contact spring is an integral structure.

[0019] In an implementation form of the second aspect, the distance from the center of the contact to the connection between the contact section and the connection section is 1.5-3mm.

[0020] and / or,

[0021] The connection section is a circular arc structure, and the radius of the connection section is 1-2mm.

[0022] In an implementation form of the second aspect, the contact section, the connection section, the first constraint section and the second constraint section are all plate-shaped structure, and the thickness is 0.4-1mm.

[0023] In an implementation form of the second aspect, the ratio of the distance from the center of the contact to the connection between the contact section and the connection section to the thickness of the contact section is 1.5-7.5.

[0024] and / or,

[0025] The connection section is a circular arc structure, and the ratio of the radius of the connection section to the thickness of the contact section is 1-5.

[0026] In a second aspect, the embodiments of the present disclosure provide a switch, comprising the terminal contact spring of the first aspect.

[0027] The technical scheme provided by the embodiments of the present disclosure has at least the following beneficial effects:

[0028] After the terminal contact spring provided by the embodiments of the present disclosure is assembled to the switch, the first constraint section and the second constraint section are respectively installed to the installation base of the switch, so that the displacement of the first constraint section in the first direction is constrained, and the displacement of the second constraint section in the second direction is constrained. The contact on the contact section is used to receive the impact of the moving contact of the switch, so as to realize the electrical connection between the terminal contact spring and the moving contact.

[0029] After the moving contact impacts the contact, the contact section and the connection section will guide the impact energy and transmit it to the first constraint section and the second constraint section in the form of an elastic impact wave. Since the plane where the first direction and the second direction are located is parallel to the plane where the elastic deformation track of the contact section is located, the movement of the first constraint section and the second constraint section which are constrained will not produce excess vibration when bearing the elastic impact wave, but stably bear the elastic impact wave and further transmit the elastic impact wave to the installation base of the switch, avoiding the continuous shaking of the contact section and the connection section after bearing the impact. In this way, the rebound time between the contact and the moving contact is significantly reduced, thereby reducing the arc ablation, ensuring the conductivity, and reducing the safety hazard. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is a structural schematic diagram of the terminal contact spring provided by the embodiments of the present disclosure;

[0032] Figure 2 is an assembly schematic diagram of the terminal contact spring provided by the embodiments of the present disclosure in the switch;

[0033] Figure 3 is a structural schematic diagram of the A direction of the terminal contact spring provided by the embodiments of the present disclosure; Figure 1

[0034] Figure 4 is a curve diagram of the relationship between the elastic impact wave dissipation and the stiffness of the impacted object provided by the embodiments of the present disclosure.

[0035] The meanings of the symbols in the drawings are as follows:

[0036] 10, contact section;

[0037] 110, contact;

[0038] 20, connection section;

[0039] 30, first constraint section; ​

[0040] 310. First mainboard; 320. First wing plate;

[0041] 40. Second constraint segment;

[0042] 410. Second mainboard; 420. Second wing plate;

[0043] 50. Bending section;

[0044] 60. Line segment;

[0045] 100. Terminal contact spring; 200. Rocker arm; 300. Stationary contact; 400. Terminal; 500. Terminal screw. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0047] Switches are common electrical devices used to control the opening and closing of circuits.

[0048] In related technologies, switches mainly include buttons, rockers, moving contacts, and stationary contacts. When a user moves a button, the rocker swings, which causes the moving contact located at the end of the rocker to move and strike the stationary contact, making the moving contact and the stationary contact come into contact and the circuit is turned on.

[0049] However, during the impact of the moving contact with the stationary contact, a slight bounce occurs between them, causing the current between them to break down through the air and form an arc. This releases high temperatures that erode the stationary and moving contacts, leading to the formation of an oxide layer on them. This not only affects conductivity but also poses a fire hazard.

[0050] To address the aforementioned technical problems, embodiments of this disclosure provide a terminal contact spring. Figure 1 This is a schematic diagram of the terminal contact spring. (See attached diagram) Figure 1 In this embodiment, the terminal contact spring includes a contact segment 10, a connecting segment 20, a first constraint segment 30, and a second constraint segment 40 connected in sequence. The contact segment 10 is located on one side of the connecting segment 20, and the first constraint segment 30 and the second constraint segment 40 are located on the other side of the connecting segment 20. The side of the contact segment 10 facing away from the connecting segment 20 has a contact 110, and the first constraint segment 30 is capable of constraining itself in a first direction ( Figure 1 The second constraint segment 40 can constrain itself in the second direction (y-direction) displacement. Figure 1 The displacement in the x direction, the first direction and the second direction are located in the same plane and have an angle between them, and the plane in which the first direction and the second direction are located is parallel to the plane in which the elastic deformation trajectory of the contact segment 10 is located.

[0051] Figure 2 This is a schematic diagram of the assembly of the terminal contact spring inside the switch, combined with... Figure 2 After assembling the terminal contact spring provided in this embodiment of the present disclosure onto the switch, the first constraint segment 30 and the second constraint segment 40 are respectively installed onto the mounting base of the switch, such that the displacement of the first constraint segment 30 in the first direction is constrained, and the displacement of the second constraint segment 40 in the second direction is constrained. The contact 110 on the contact segment 10 is used to receive the impact of the moving contact of the switch, so as to realize the electrical connection between the terminal contact spring and the moving contact.

[0052] After the moving contact impacts the contact 110, the contact section 10 and the connecting section 20 guide the impact energy and transmit it to the first constraint section 30 and the second constraint section 40 in the form of an elastic shock wave. Since the planes of the first and second directions are parallel to the plane of the elastic deformation trajectory of the contact section 10, the moving and constrained first and second constraint sections 30 and 40 will not generate excessive vibration when bearing the elastic shock wave. Instead, they will stably bear the elastic shock wave and further transmit it to the switch's mounting base, preventing the contact section 10 and the connecting section 20 from continuously shaking after impact. This significantly reduces the bounce time between the contact 110 and the moving contact, thereby reducing arcing and erosion, ensuring conductivity, and reducing safety hazards.

[0053] As mentioned above, the first constraint segment 30 and the second constraint segment 40 can effectively bear and transmit the elastic shock wave from the contact segment 10 and the connecting segment 20, which is one of the key factors in reducing the bounce time between the contact 110 and the moving contact. The first constraint segment 30 and the second constraint segment 40 will be further introduced below.

[0054] See you again Figure 1 In this embodiment, the first constraint segment 30 includes a first main board 310 and at least two first wing plates 320. The at least two first wing plates 320 are located on opposite sides of the first main board 310 along its length, and the first wing plates 320 and the first main board 310 are located on the same plane. One end of the first main board 310 along its length is connected to the connecting segment 20, and the other end of the first main board 310 along its length is connected to the second constraint segment 40.

[0055] In the above implementation, the first main board 310 is the main body of the first constraint segment 30, which is used to connect the second constraint segment 40 and the connecting segment 20, thereby transmitting the elastic shock wave from the connecting segment 20 to the second constraint segment 40. The first wing plates 320 are located on opposite sides of the main board and are used to cooperate with the mounting base of the switch. The first wing plates 320 provide stable support for the first main board 310 and also provide stable displacement constraint for the first main board 310.

[0056] For example, the first wing plate 320 is perpendicular to the first direction. By clamping the first wing plate 320 through the mounting base of the switch, the movement of the first wing plate 320 in the first direction can be effectively constrained, that is, the movement of the first constraint segment 30 in the first direction can be constrained.

[0057] Since the elastic shock wave is transmitted from the connecting segment 20 to the first motherboard 310, the intensity of the elastic shock wave is greatest near the connecting segment 20 on the first motherboard 310. In order to better restrain the vibration of the first motherboard 310 under the action of the elastic shock wave, for example, the first wing plate 320 is located near the connecting segment 20 on the first motherboard 310.

[0058] For example, the first constraint segment 30 includes two first wing plates 320, which are located on opposite sides of the first main plate 310 along its length and are symmetrical about the first main plate 310. This design not only effectively realizes the function of the first wing plates 320, but also reduces the processing difficulty and cost of the first constraint segment 30.

[0059] See also Figure 1 In this embodiment, the second constraint segment 40 includes a second main board 410 and at least two second wing plates 420. The at least two second wing plates 420 are located on opposite sides of the second main board 410 along its length, and the second wing plates 420 and the second main board 410 are located on the same plane. One end of the second main board 410 along its length is connected to the first constraint segment 30.

[0060] In the above implementation, the first main board 310 is the main body of the first constraint segment 30, which is used to connect to the first constraint segment 30 and thus bear the elastic shock wave transmitted by the first constraint segment 30. The second wing plates 420 are located on opposite sides of the main board and are used to cooperate with the mounting base of the switch. Through the second wing plates 420, on the one hand, a stable support is provided for the second main board 410, and on the other hand, a stable displacement constraint is applied to the second main board 410.

[0061] For example, the second wing plate 420 is perpendicular to the second direction. By clamping the second wing plate 420 through the mounting base of the switch, the movement of the second wing plate 420 in the second direction can be effectively constrained, that is, the movement of the second constraint segment 40 in the second direction can be constrained.

[0062] For example, the second constraint segment 40 includes two second wing plates 420, which are located on opposite sides of the second main plate 410 along its length and are symmetrical about the second main plate 410. This design not only effectively realizes the function of the second wing plates 420, but also reduces the processing difficulty and cost of the second constraint segment 40.

[0063] It should be noted that since the elastic shock wave is weakened to a certain extent after being transmitted from the first constraint segment 30 to the second constraint segment 40, there is no need to specially design the position of the second wing plate 420 on the second main plate 410, thereby further reducing the processing difficulty of the second constraint segment 40.

[0064] Furthermore, after the terminal contact spring provided in this embodiment is assembled to the switch, the mounting base of the switch can also constrain the second constraint segment 40 in a third direction by clamping the second wing plate 420. Figure 1 The displacement in the z-direction.

[0065] In this embodiment, the first wing plate 320 and the second wing plate 420 are perpendicular to each other, the first direction is perpendicular to the first wing plate 320, and the second direction is perpendicular to the second wing plate 420.

[0066] In the above implementation, since the first wing plate 320 and the second wing plate 420 are perpendicular to each other, and the first wing plate 320 is perpendicular to the first direction, while the second wing plate 420 is perpendicular to the second direction, the first direction and the second direction are made perpendicular to each other. In this way, by constraining the movement direction of the first constraint segment 30 and the second constraint segment 40, the overall movement direction of the terminal contact spring can be better constrained, thereby effectively improving the load-bearing capacity of the first constraint segment 30 and the second constraint segment 40 against elastic shock waves.

[0067] For example, the third direction is perpendicular to the first direction and the second direction respectively. In this way, the terminal contact spring can be limited in all directions, thus preventing the terminal contact spring from vibrating.

[0068] Figure 3 for Figure 1 A schematic diagram of the structure in direction A, combined with Figure 3 In this embodiment, the second constraint segment 40 is located on the side of the first constraint segment 30 that is away from the contact segment 10.

[0069] The second constraint segment 40 is kept as far away from the contact segment 10 as possible, which avoids interference between the contact segment 10 and the second constraint segment 40 when elastic deformation occurs, and effectively improves the reliability of the terminal contact spring.

[0070] In this embodiment, the terminal contact spring is an integral structural component.

[0071] In the above implementation method, designing the terminal contact spring as an integral structural component has at least the following three beneficial effects: First, it facilitates the conduction of current on the terminal contact spring, avoiding contact resistance in the spliced ​​structure, which can lead to poor conductivity, or even circuit breakage and arcing. Second, it helps control the size of the terminal contact spring, thereby achieving a lightweight and miniaturized design, which is particularly suitable for conventional switches in AC circuits. Third, it facilitates the overall stiffness design of the terminal contact spring, allowing the maximum dissipation stiffness to be determined through experiments and CAE analysis, thereby effectively reducing bounce time, thus reducing arcing erosion, ensuring conductivity, and reducing safety hazards.

[0072] Regarding the third point, see Figure 4 , Figure 4 The graph shows the relationship between the dissipation of an elastic shock wave and the stiffness of the impacted object. It can be seen that the curve is an upward-opening parabola. If the stiffness of the impacted object is too high, the elastic shock wave cannot be transmitted into the object and bounces back, resulting in a longer bounce time. Conversely, if the stiffness of the impacted object is too low, the elastic shock wave is stored within the object, undergoing repeated deformation and oscillation, also resulting in a longer bounce time. Only when the stiffness of the impacted object is neither too high nor too low, but equal to the maximum dissipation stiffness, can the elastic shock wave be transmitted to the impacted object to the maximum extent, causing the bounce to stop most quickly.

[0073] See you again Figure 3 In this embodiment, the distance L1 from the center of the contact 110 to the connection point between the contact segment 10 and the connecting segment 20 is 1.5 to 3 mm.

[0074] For example, in this embodiment, the distance L1 from the center of the contact 110 to the connection point between the contact segment 10 and the connecting segment 20 is 2.4 to 2.6 mm.

[0075] In this embodiment, the connecting segment 20 is an arc-shaped structural component with a radius R of 1 to 2 mm.

[0076] For example, in this embodiment, the connecting segment 20 is an arc-shaped structural component, and the radius R of the connecting segment 20 is 1.4 to 1.6 mm.

[0077] In this embodiment, the contact segment 10, the connecting segment 20, the first constraint segment 30 and the second constraint segment 40 are all plate-shaped structural components with a thickness t of 0.4 to 1 mm.

[0078] For example, in this embodiment, the contact segment 10, the connecting segment 20, the first constraint segment 30 and the second constraint segment 40 are all plate-shaped structural members with a thickness t of 0.6 to 0.8 mm.

[0079] Table 1 shows the experimental data on distance L1, radius R, thickness t and bounce time. It should be noted that Table 1 contains 7 sets of data selected from a large amount of data.

[0080] No. L1 (mm) R (mm) t (mm) Bounce time (ms) 1 2.5 1.5 0.7 2.160 2 1.5 1.5 0.7 4.129 3 3 1.5 0.7 2.474 4 2.5 1 0.7 2.822 5 2.5 2 0.7 2.409 6 2.5 1.5 0.4 2.891 7 2.5 1.5 1 3.513

[0081] Table 1

[0082] As shown in the first set of data in Table 1, the bounce time is shortest when the distance L1, radius R, and thickness t are selected within the above-mentioned range. Therefore, by controlling the distance L1, radius R, and thickness t, the bounce time can be effectively reduced.

[0083] In this embodiment, the distance L1 from the center of the contact 110 to the connection point between the contact segment 10 and the connecting segment 20 is 1.5 to 7.5 in ratio to the thickness t of the contact segment 10; the radius R of the connecting segment 20 is 1 to 5 in ratio to the thickness t of the contact segment 10.

[0084] In the above implementation, the thickness t is the thickness of the terminal contact spring plate. By designing the ratio between the distance L1 and the thickness t, and the ratio between the radius R and the thickness t, the bounce time can be effectively reduced.

[0085] In this embodiment, the terminal contact spring also includes a pressure section 60 and a bent section 50 connected in sequence. The pressure section 60 is inserted into the terminal 400 of the switch. Under the action of the terminal screw 500, the wire is pressed tightly onto the pressure section 60, thereby achieving a stable electrical connection. One end of the bent section 50 is connected to the pressure section 60, and the other end of the bent section 50 is connected to the second constraint section 40 for current transmission. Furthermore, the shape of the bent section 50, in addition to... Figure 1-3 In addition to the Z-shape shown, adjustments can be made according to the internal structure of the switch, which is not limited in this disclosure.

[0086] It should be noted that the contact section 10, the connecting section 20, the first constraint section 30 and the second constraint section 40, the pressure section 60 and the bending section 50 are an integral structural component.

[0087] This disclosure provides a switch, the switch including... Figure 1-3 The terminal contact spring 100 is shown.

[0088] Because the switch includes Figure 1-3 The terminal contact spring 100 shown indicates that the switch has... Figure 1-3 All the beneficial effects of the terminal contact spring 100 shown will not be elaborated here.

[0089] In this embodiment, the switch includes two terminal contact springs 100, which are symmetrically arranged about the rocker 200. Both ends of the rocker 200 have stationary contacts 300. As the rocker 200 swings, one stationary contact 300 contacts one terminal contact spring 100, while the other stationary contact 300 separates from the other terminal contact spring 100.

[0090] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described objects changes, the relative positional relationship may also change accordingly.

[0091] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A terminal contact spring, characterized in that, include: The contact segment (10), connecting segment (20), first constraint segment (30), and second constraint segment (40) are connected in sequence. The contact segment (10) is located on one side of the connecting segment (20), and the first constraint segment (30) and the second constraint segment (40) are located on the other side of the connecting segment (20). The first constraint segment (30) and the second constraint segment (40) are both flat plate-shaped structural members. The first constraint segment (30) includes a first main plate (310) and at least two first wing plates (320). The at least two first wing plates (320) are respectively located on the... The first main board (310) is located on opposite sides along its length. One end of the first main board (310) along its length is connected to the connecting segment (20), and the other end of the first main board (310) along its length is connected to the second constraint segment (40). The second constraint segment (40) includes a second main board (410) and at least two second wing plates (420). The at least two second wing plates (420) are located on opposite sides along the length of the second main board (410), and one end of the second main board (410) along its length is connected to the first constraint segment (30). The contact segment (10) has a contact (110) on the side facing away from the connecting segment (20); The first constraint segment (30) can constrain its own displacement in the first direction, and the second constraint segment (40) can constrain its own displacement in the second direction. The first direction and the second direction are located in the same plane and have an angle between them. The first direction is perpendicular to the first wing plate (320), and the second direction is perpendicular to the second wing plate (420). The plane in which the first direction and the second direction are located is parallel to the plane in which the elastic deformation trajectory of the contact segment (10) is located.

2. The terminal contact spring according to claim 1, characterized in that, The first wing plate (320) and the first main plate (310) are located on the same plane.

3. The terminal contact spring according to claim 2, characterized in that, The second wing plate (420) and the second main plate (410) are located on the same plane.

4. The terminal contact spring according to claim 3, characterized in that, The first wing (320) and the second wing (420) are perpendicular to each other.

5. The terminal contact spring according to any one of claims 1-4, characterized in that, The second constraint segment (40) is located on the side of the first constraint segment (30) away from the contact segment (10).

6. The terminal contact spring according to any one of claims 1-4, characterized in that, The terminal contact spring is an integral structural component.

7. The terminal contact spring according to any one of claims 1-4, characterized in that: The distance from the center of the contact (110) to the connection point between the contact segment (10) and the connecting segment (20) is 1.5~3mm; And / or, The connecting segment (20) is an arc-shaped structural component with a radius of 1~2mm.

8. The terminal contact spring according to any one of claims 1-4, characterized in that, Both the contact section (10) and the connecting section (20) are plate-shaped structural components with a thickness of 0.4~1mm.

9. The terminal contact spring according to claim 8, characterized in that, The distance from the center of the contact (110) to the connection point between the contact segment (10) and the connecting segment (20) is 1.5 to 7.5 times the thickness of the contact segment (10); And / or, The connecting segment (20) is an arc-shaped structural component, and the ratio of the radius of the connecting segment (20) to the thickness of the contact segment (10) is 1 to 5.

10. A switch, characterized in that, Includes the terminal contact spring as described in any one of claims 1-9.

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