Electric connection terminal and circuit board

Abstract

The embodiment of the utility model discloses an electric connection terminal and a circuit board. The circuit board comprises a substrate and an electric connection terminal, the substrate is provided with a positioning hole, and an outer sleeve of the electric connection terminal is inserted into the positioning hole. The electric connection terminal comprises an outer sleeve, the outer surface of which is provided with a step part, and the step part abuts against the substrate; the elastic contact piece is fixed in the outer sleeve; and the projection of the step part in the plugging direction of the terminal falls into the projection range of the elastic contact element in the plugging direction. The beneficial effects of the utility model are that shock resistance and connection stability are high, plugging and unplugging are convenient, the service life is long, and the current-carrying capability is strong.

Description

Technical Field

[0001] This application relates to electronic connection devices, and more particularly, to an electrical connection terminal and a circuit board. Background Art

[0002] Electrical connection terminals are an essential part of electrical connections and are widely used in civil, commercial, and industrial applications. In some current scenarios, such as in new energy vehicle motor control PCB templates, in-vehicle multimedia, battery interfaces, multi-in-one electronic control transfer connections, etc., higher requirements are placed on the terminals.

[0003] Existing terminals such as fish-eye terminals, fork jacks, and spring probes generally have defects such as high processing difficulty, low assembly efficiency, large insertion and extraction forces, inconvenient operation, directional requirements for installation, inability to perform blind insertion, short insertion and extraction life, poor seismic resistance, poor connection stability, high contact resistance, and small current-carrying capacity. Summary of the Utility Model

[0004] The main purpose of the present utility model is to propose an electrical connection terminal and a circuit board, aiming to solve the above problems existing in the prior art.

[0005] To achieve the above object, the present utility model provides an electrical connection terminal, including:

[0006] An outer sleeve having a stepped portion on its outer surface;

[0007] An elastic contact member fixed within the outer sleeve;

[0008] The projection of the stepped portion in the insertion direction of the terminal falls within the projection range of the elastic contact member in the insertion direction.

[0009] In some embodiments,

[0010] The outer sleeve has a first end and a second end along the insertion direction, and the first end is for a pin to be inserted;

[0011] The stepped portion is located between the first end and the second end;

[0012] Both ends of the elastic contact member respectively abut against the first end and the second end.

[0013] In some embodiments,

[0014] The elastic contact member has a varying cross-section along the insertion direction;

[0015] The stepped portion is located between the first end and the narrowest cross-section of the elastic contact member.

[0016] In some embodiments,

[0017] The outer diameter of the second end portion is smaller than that of the first end portion.

[0018] In some embodiments,

[0019] The first end portion includes a first stop portion obtained by spin riveting;

[0020] The first stop portion presses the elastic contact member so that the ratio of the diameter of the narrowest cross-section to the widest cross-section of the elastic contact member perpendicular to the insertion direction is a preset value.

[0021] In some embodiments,

[0022] The middle of the first stop portion has a first through hole penetrating along the insertion direction;

[0023] The edge of the first stop portion on the side away from the elastic contact member and close to the first through hole has a chamfer.

[0024] In some embodiments,

[0025] The second end portion includes a second stop portion that abuts against the elastic contact member;

[0026] The middle of the second stop portion has a second through hole penetrating along the insertion direction.

[0027] In some embodiments,

[0028] The elastic contact member includes a plurality of elastic pieces;

[0029] The plurality of elastic pieces are evenly distributed in the circumferential direction in a plane perpendicular to the insertion direction;

[0030] Each of the elastic pieces is bent in a direction away from the inner wall of the outer sleeve.

[0031] In some embodiments,

[0032] The elastic contact member further includes:

[0033] A first support portion connecting one end of each of the elastic pieces and abutting against the first end portion;

[0034] A second support portion connecting the other end of each of the elastic pieces and abutting against the second end portion.

[0035] In some embodiments,

[0036] Both the first support portion and the second support portion are circular arcs in a plane perpendicular to the insertion direction;

[0037] The positions of the two arc-shaped notches are the same, and the connection positions of each elastic piece on the two arc shapes are the same.

[0038] In addition, to achieve the above object, the present utility model further provides a circuit board, including:

[0039] A substrate, on which positioning holes are provided;

[0040] The electrical connection terminals as described in any one of the foregoing embodiments;

[0041] The outer sleeve of the electrical connection terminal is inserted into the positioning hole and the step portion abuts against the substrate.

[0042] The projection of the step portion of the outer sleeve of the electrical connection terminal proposed in this application in the insertion direction of the terminal falls within the projection range of the elastic contact member in the insertion direction, so that when the pin is inserted into the electrical connection terminal fixed on the circuit board, the pin will pass through the circuit board plane. Even if the pin shakes during use, normal connection can be guaranteed, improving the seismic resistance and connection stability.

[0043] For the electrical connection terminal proposed in this application, the elastic contact member is fixed inside the outer sleeve between the first end and the second end, and the elastic contact member is not easily damaged during the plugging and unplugging process, improving the plugging and unplugging life.

[0044] For the electrical connection terminal proposed in this application, the first end is obtained with a first stop portion by spin riveting. The spin riveting process is mature, the processing difficulty is low, and the assembly efficiency is high. By controlling the spin riveting stroke, the first stop portion presses the elastic contact member, and the ratio of the diameter of the narrowest part to the widest part of the elastic contact member in the cross-section perpendicular to the insertion direction is a preset value, so that an appropriate plugging and unplugging force can be controlled, which is convenient for operation.

[0045] The electrical connection terminal proposed in this application has no directional requirement for the pin and can be blindly inserted. At the same time, the first through hole edge of the first stop portion on the side away from the elastic contact member has a chamfer, and the chamfer structure can guide the pin to be inserted smoothly.

[0046] For the electrical connection terminal proposed in this application, the elastic contact member includes a plurality of elastic pieces, and the plurality of elastic pieces are evenly distributed along the circumferential direction and bend away from the inner wall of the outer sleeve, so that after the pin is inserted, it can contact all the elastic pieces, increasing the contact area, reducing the contact resistance, and improving the current-carrying capacity. Description of the Drawings

[0047] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.

[0048] The methods, systems, and / or programs in the accompanying drawings will be further described according to exemplary embodiments. These exemplary embodiments will be described in detail with reference to the drawings. These exemplary embodiments are non-limiting exemplary embodiments, where reference numerals represent similar mechanisms in various views of the drawings.

[0049] Figure 1 It is a schematic structural diagram of an electrical connection terminal related to some embodiment solutions of the present application;

[0050] Figure 2 is Figure 1 a cross-sectional view of;

[0051] Figure 3 It is a view of the electrical connection terminal related to some embodiment solutions of the present application in another direction;

[0052] Figure 4 is for Figure 3 a schematic structural diagram of the elastic contact member from the same perspective.

[0053] Icons: 100 - outer sleeve, 110 - first end portion, 111 - first stop portion, 112 - first through hole, 113 - chamfer, 120 - second end portion, 121 - second stop portion, 122 - second through hole, 130 - step portion, 200 - elastic contact member, 210 - first support portion, 220 - second support portion, 230 - elastic sheet, 240 - notch Detailed implementation manners

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0056] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0057] In the description of the present application, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, in the description of the present application, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they should not be construed as indicating or implying relative importance.

[0058] In addition, in the description of the present application, if terms such as "horizontal" and "vertical" are used, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but they can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0059] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0060] Embodiment

[0061] Figure 1 is a schematic structural view of the electrical connection terminal in the embodiment of the present application; Figure 2 is Figure 1 a cross-sectional view of Figure 3 is a view of the electrical connection terminal in the embodiment of the present application in another direction. Figure 4 is Figure 3 a schematic structural view of the elastic contact member 200 from the

[0062] Please refer to Figures 1-4, the electrical connection terminal in this embodiment includes an outer sleeve 100 and an elastic contact member 200. The outer sleeve 100 is made of a conductive metal material, including but not limited to metal elements such as copper and aluminum and their alloy materials. The outer sleeve 100 is generally cylindrical, and the axial direction of the cylinder is the insertion direction of the terminal (i.e., Figure 1 and Figure 2 the positive Y-axis direction in). The elastic contact member 200 is fixed inside the outer sleeve 100. Specifically, the outer sleeve 100 has a first end 110 and a second end 120 along the insertion direction. The two ends of the elastic contact member 200 respectively abut against the first end 110 and the second end 120, thereby being fixed inside the outer sleeve 100. The pin can be inserted into the inside of the outer sleeve 100 from the first end 110 and electrically connected to the elastic contact member 200. Since the elastic contact member 200 is fixed inside the outer sleeve 100 between the first end 110 and the second end 120, the elastic contact member 200 is not easily damaged during the insertion and extraction process, thereby improving the insertion and extraction life, and the number of insertions and extractions can be more than 200 times.

[0063] Optionally, the electrical connection terminal in this embodiment is used for a circuit board. The circuit board includes a substrate and an electrical connection terminal. The substrate has a positioning hole. The outer diameter of the second end 120 of the electrical connection terminal is adapted to the aperture of the positioning hole, and the second end 120 is configured to be inserted into the positioning hole, thereby fixing the electrical connection terminal on the substrate. The outer diameter of the second end 120 is smaller than the outer diameter of the first end 110, so that the user can clearly distinguish the first end 110 and the second end 120 during the assembly and insertion process, avoiding assembly and pin insertion errors.

[0064] There is a step portion 130 on the outer surface of the outer sleeve 100 between the first end 110 and the second end 120, and the outer diameter of the step portion 130 is larger than the outer diameter of the second end 120. Since the outer diameter of the second end 120 is adapted to the aperture of the positioning hole, when the second end 120 is inserted into the positioning hole, the step portion 130 can abut against the substrate, thereby limiting the electrical connection terminal.

[0065] The projection of the step portion 130 in the insertion direction of the terminal falls within the projection range of the elastic contact member 200 in the insertion direction, that is, the position of the step portion 130 on the Y-axis is within the position range of the elastic contact member 200 on the Y-axis. Under this condition, since the step portion 130 abuts against the substrate, when the pin is inserted into the electrical connection terminal fixed on the circuit board, it will pass through the circuit board plane, thereby reducing the displacement amount of the pin and the terminal during shaking, ensuring normal electrical connection, and improving the seismic resistance and connection stability of the terminal.

[0066] Furthermore, the elastic contact member 200 has a varying cross-section along the insertion direction, and the step portion 130 is located between the first end 110 and the narrowest cross-section of the elastic contact member 200 perpendicular to the insertion direction ( Figure 2between the A cross-section in []. After the pin is inserted into the terminal, the elastic contact member 200 contacts and presses the pin at the narrowest cross-section perpendicular to the insertion direction. Since the fixing point of the terminal to the circuit board is at the step portion 130, and the two positions where the force is applied to the terminal when the pin shakes are respectively at the first end portion 110 and the narrowest portion of the elastic contact member 200, and the force application directions at the two positions are the same. Therefore, the two force application positions are respectively located on both sides of the step portion 130, which can further reduce the displacement amount of the pin and the terminal during shaking, and improve the earthquake resistance and connection stability of the terminal.

[0067] The first end portion 110 has a first stop portion 111 extending radially inward, and the second end portion 120 has a second stop portion 121 extending radially inward. The first stop portion 111 and the second stop portion 121 respectively abut against the elastic contact member 200 from both sides of the elastic contact member 200, thereby fixing the elastic contact member 200 inside the outer sleeve 100. The middle of the first stop portion 111 has a first through hole 112 penetrating in the insertion direction, and the pin passes through the first through hole 112 and is inserted into the inside of the outer sleeve 100. The edge of the first stop portion 111 on the side away from the elastic contact member 200 and close to the first through hole 112 has a chamfer 113, so that the first stop portion 111 forms an outward-expanded trumpet shape here, which is convenient for guiding the pin to be inserted smoothly.

[0068] The first stop portion 111 is obtained by spin riveting. The first stop portion 111 presses the elastic contact member 200 so that the elastic contact member 200 is at the narrowest cross-section perpendicular to the insertion direction ( Figure 2 the A cross-section in []) and the widest cross-section (the cross-section at the first support portion 210 and the second support portion 220, such as Figure 2 the B cross-section in []) has a diameter ratio of a preset value. During production, the raw material can be first cut to obtain an intermediate body with a second stop portion 121. At this time, the intermediate body does not have a first stop portion 111 at the first end portion 110. Then the manufactured elastic contact member 200 is placed into the intermediate body from the first end portion 110, and then spin riveting is performed on the first end portion 110. By controlling the spin riveting stroke, while obtaining the first stop portion 111, the first stop portion 111 presses the elastic contact member 200, and the elastic contact member 200 is bent, and the diameter of the elastic contact member 200 at the narrowest cross-section perpendicular to the insertion direction ( Figure 2 the A cross-section in []) changes. By controlling the diameter ratio of the narrowest cross-section to the widest cross-section to be a preset value, a suitable terminal insertion and extraction force can be obtained, which is convenient for the user to insert and extract the operation.

[0069] Optionally, the middle of the second stop portion 121 has a second through hole 122 penetrating in the insertion direction. The user can use the second through hole 122 as an observation window to check the contact situation between the elastic contact member 200 and the pin.

[0070] The elastic contact member 200 in this embodiment is in the shape of a column with thick ends and a thin middle along the plugging direction. Specifically, the elastic contact member 200 includes a first supporting portion 210 , a second supporting portion 220 , and a plurality of elastic sheets 230 .

[0071] The first supporting portion 210 and the second supporting portion 220 are located at two ends in the plugging direction and abut against the first end portion 110 and the second end portion 120 respectively, so that the elastic contact member 200 is fixed inside the outer sleeve 100 .

[0072] One end of each elastic sheet 230 is connected to the first support portion 210, and the other end is connected to the second support portion 220. The multiple elastic sheets 230 are evenly distributed along the circumferential direction in a plane perpendicular to the plugging direction, and each elastic sheet 230 is bent in a direction away from the inner wall of the outer sleeve 100, so that the elastic contact member 200 forms a columnar shape with thick ends and thin middle. There is a certain gap between adjacent elastic sheets 230, so as to leave enough space for the deformation of the elastic sheets 230.

[0073] During riveting, the first stopper 111 squeezes the elastic contact piece 200, so that the bending degree of the elastic sheet 230 increases, the diameter of the narrowest section of the elastic contact piece 200 perpendicular to the plug-in direction becomes smaller, and the diameter of the widest section remains unchanged, thereby completing the adjustment of the diameter ratio of the narrowest section to the widest section.

[0074] The first support portion 210 and the second support portion 220 are both arc-shaped in a plane perpendicular to the plug-in direction, the two arc-shaped notches 240 are at the same position, and the connection position of each elastic sheet 230 on the two arcs is the same, that is, the elastic contact piece 200 is in the shape of a rectangular fence after being unfolded into a plane along the circumferential direction, thereby ensuring that when the first stop portion 111 squeezes the elastic contact piece 200, the force direction of the elastic sheet 230 is always along the plug-in direction, and the elastic contact piece 200 will not twist along the circumferential direction, thereby avoiding the influence of the circumferential twist on the diameter of the narrowest cross-section, and improving the control accuracy of the diameter ratio.

[0075] The elastic contact member 200 in this embodiment can be made of a copper alloy material. Specifically, a rectangular copper alloy sheet can be selected as the raw material, and a plurality of curved elastic sheets 230 in the middle are punched out, and the first support portion 210 and the second support portion 220 at both ends are retained, and then the copper alloy sheet is bent to obtain the elastic contact member 200.

[0076] The electrical connection terminals of this embodiment can completely replace the existing fisheye terminals, elastic pins, and tuning fork pins, and can be used in harsh conditions and environments, such as: power communication connectors for missile controllers, power communication connectors for submarine separators, tank signal connectors, PCB boards for vehicle control modules, high and low voltage connection components for vehicle multimedia control, all-in-one new energy and power battery thermal management system connectors, and can be widely used in communication base stations, PCs and other scenarios.

[0077] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An electrical connection terminal, characterized in that: include: An outer casing having a stepped portion on an outer surface thereof; an elastic contact member fixed in the outer sleeve; The projection of the step portion in the plugging direction of the terminal falls within the projection range of the elastic contact piece in the plugging direction; The outer sleeve has a first end and a second end along the plugging direction, and the first end is for the plug pin to be inserted; The first end portion includes a first stopper portion obtained by spin riveting; A first through hole is provided in the middle of the first stopper portion and penetrates along the plugging direction; The first stop portion has a chamfered edge at a side away from the elastic contact piece and close to the first through hole.

2. The electrical connection terminal according to claim 1, characterized in that: The step portion is located between the first end portion and the second end portion; Two ends of the elastic contact member abut against the first end portion and the second end portion respectively.

3. The electrical connection terminal according to claim 2, characterized in that: The elastic contact piece has a variable cross section along the plugging direction; The step portion is located between the first end portion and the narrowest cross-section of the elastic contact piece.

4. The electrical connection terminal according to claim 2, characterized in that: The outer diameter of the second end portion is smaller than the outer diameter of the first end portion.

5. The electrical connection terminal according to claim 2, characterized in that: The first stopper presses the elastic contact piece so that the diameter ratio of the narrowest cross section to the widest cross section of the elastic contact piece perpendicular to the plugging direction is a preset value.

6. The electrical connection terminal according to claim 2, characterized in that: The second end portion includes a second stop portion, and the second stop portion abuts against the elastic contact member; A second through hole is formed in the middle of the second stopper portion and penetrates along the plugging direction.

7. The electrical connection terminal according to claim 2, characterized in that: The elastic contact member comprises a plurality of elastic sheets; The plurality of elastic sheets are evenly distributed along the circumferential direction in a plane perpendicular to the plugging direction; Each of the elastic sheets is bent in a direction away from the inner wall of the outer sleeve.

8. The electrical connection terminal according to claim 7, characterized in that: The elastic contact member further comprises: A first supporting portion, connected to one end of each of the elastic sheets and abutting against the first end portion; The second supporting portion is connected to the other end of each of the elastic sheets and abuts against the second end portion.

9. The electrical connection terminal according to claim 8, characterized in that: The first supporting portion and the second supporting portion are both arc-shaped in a plane perpendicular to the plugging direction; The notches of the two arcs are at the same position, and the connection position of each elastic sheet on the two arcs is the same.

10. A circuit board, characterized in that: include: A substrate, wherein a positioning hole is provided on the substrate; The electrical connection terminal according to any one of claims 1 to 9; The outer sleeve of the electrical connection terminal is inserted into the positioning hole and the step portion abuts against the substrate.

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