A press-fit terminal and connector

Abstract

The present invention provides a press-fit terminal and connector, which belong to the technical field of electrical connectors. The press-fit terminal includes: a base; an insert, one end of which is connected to the lower end of the base and the other end of which extends downward; the cross-sectional width of the insert gradually decreases toward the extension end; a plug-in portion, which is connected to the base through a deformable member; and a slot with an opening toward the insert in the plug-in portion. In the press-fit terminal of the present invention, the cross-sectional width of the insert gradually changes, and the distance that the insert is inserted into the slot is controlled, thereby controlling the force between the plug-in portion and the socket, which provides good protection for the circuit board; at the same time, the amount of the insert inserted into the slot can be adjusted, and sockets with different apertures can be used, thereby achieving wider versatility of the press-fit terminal.

Description

Technical Field

[0001] The invention relates to the technical field of electrical connectors, and in particular to a press-fit terminal and a connector. Background Art

[0002] The existing connection methods for conducting signals are generally divided into two types: welding connection and welding-free connection. The use of welding-free connection technology is undoubtedly one of the fastest and most convenient ways to transmit signals to actuators. It also has a positive impact on reducing environmental pollution and the economy of raw material costs.

[0003] The combination of press-fit terminals and circuit boards (PCBs) is a solderless connection method that can reduce the use of flux and avoid adverse reactions when the motherboard is exposed to an over-high temperature soldering furnace, and can be easily removed and replaced. Because there are no solder problems such as empty soldering, its electrical reliability is high, and it is widely used in industries such as communications and automotive electronics.

[0004] The existing press-fit terminals are usually fisheye terminals, which have elastic parts on both sides. The fisheye terminals are inserted into the sockets of the PCB board through the deformation of the elastic parts themselves. Therefore, the fisheye terminals are electrically connected to the electronic components. However, since the fisheye terminals are inserted into the sockets through their own deformation, the force exerted by the fisheye terminals on the sockets during the insertion process is difficult to control, which can easily cause damage to the PCB board. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the force exerted by the fisheye terminal on the socket during the plugging process is difficult to control and easily causes damage to the PCB board, thereby providing a press-fit terminal.

[0006] The invention also provides a connector.

[0007] The present invention provides a press-fit terminal, comprising:

[0008] base;

[0009] An insert, one end of which is connected to the lower end of the base, and the other end of which extends downward; the cross-sectional width of the insert gradually decreases toward the extending end;

[0010] The plug-in part is connected to the base through a deformable part; the plug-in part has a slot opening toward the inserting part.

[0011] As a preferred solution, it also includes:

[0012] The abutment portion is arranged at the upper end of the plug-in portion; the abutment portion has an abutment surface, and the abutment surface is suitable for abutting against the end surface of the plug-in hole.

[0013] As a preferred solution, the plug-in portion includes:

[0014] The connecting section has clamping rods arranged at intervals, the outer side surfaces of the clamping rods are suitable for clamping with the side walls of the jack; and slots are arranged between the clamping rods.

[0015] As a preferred solution, the plug-in portion further includes:

[0016] The guide section is connected below the connecting section; the cross-sectional width of the guide section gradually decreases downward.

[0017] As a preferred solution, it also includes: a limiting protrusion, which is arranged on the inner wall of the slot; and the limiting protrusion extends toward the center of the slot.

[0018] As a preferred solution, the plug-in portion includes a connecting section and a guiding section, and the limiting protrusion is arranged between the connecting section and the guiding section.

[0019] As a preferred solution, the deformable member is a bent elastic member.

[0020] As a preferred solution, the deformable members have at least two evenly distributed around the central axis of the insert.

[0021] As a preferred solution, the surface of the insert that contacts the inner wall of the slot of the plug-in portion is a push surface, and the angle formed between the push surface and the central axis of the insert is 5.5° to 6.5°.

[0022] The present invention further provides a connector, comprising any one of the press-fit terminals described above.

[0023] The technical solution of the present invention has the following advantages:

[0024] 1. The press-fit terminal provided by the present invention comprises: a base, an insert and a plug-in portion; the plug-in portion is plugged into the jack of the circuit board and electrically connected to the circuit board; the insert is inserted into the slot, and since the cross-sectional width of the insert increases from bottom to top, the plug-in portion and the jack are gradually tightly matched and electrically connected; the cross-sectional width of the insert changes gradually, and the distance of the insert into the slot is controlled, so as to control the force between the plug-in portion and the jack, and play a good protective role on the circuit board;

[0025] At the same time, by adjusting the amount of the insert inserted into the slot, jacks with different apertures can be used, thereby achieving wider versatility of the press-fit terminal.

[0026] 2. The press-fit terminal provided by the present invention further includes: an abutment portion; during the insertion process, the abutment surface of the abutment portion abuts against the end surface of the jack to achieve fixation of the position between the terminal and the circuit board.

[0027] 3. The press-fit terminal provided by the present invention, the plug-in portion includes: a connecting section and a guide section; the guide section plays a guiding role to assist the connecting section to be inserted into the socket; the cross-sectional width of the guide section gradually decreases downward to facilitate the guide section to enter the socket.

[0028] 4. The press-fit terminal provided by the present invention also includes: a limit protrusion; the limit protrusion is arranged between the connecting section and the guide section, and the limit protrusion extends toward the center of the slot; when the connecting section and the socket are connected, the setting of the limit protrusion makes it impossible for the connecting section to easily fall out of the socket; it can play a role in preventing the terminal from retreating.

[0029] 5. In the press-fit terminal provided by the present invention, the deformable member is an elastic member that is bent; the shape of the deformable member is an optimal shape obtained through multiple experiments.

[0030] 6. The press-fit terminal provided by the present invention generates friction resistance between the push surface and the inner wall of the slot after the insert is inserted into the slot, which plays a fixing role. The overall setting of the structure can achieve very low insertion force and very high fixing force; when the angle between the push surface and the central axis of the insert is 5.5°~6.5°, the insertion force and fixing force reach the optimal state.

[0031] 7. The connector provided by the present invention includes any of the press-fit terminals described above, and thus has any of the advantages described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the press-fit terminal of the present invention.

[0034] Figure 2 for Figure 1 A partial enlarged view of point A shown.

[0035] Figure 3 It is a front view of the press-fit terminal of the present invention.

[0036] Figure 4 The figure is a connection relationship diagram of the press-fit terminal of the present invention and the circuit board in the first state.

[0037] Figure 5 The figure is a connection relationship diagram of the press-fit terminal of the present invention and the circuit board in the second state.

[0038] Figure 6 The figure is a connection relationship diagram of the press-fit terminal of the present invention and the circuit board in the third state.

[0039] Description of reference numerals:

[0040] 1. Base; 2. Insert; 3. Plug-in portion; 4. Circuit board; 5. Deformable member; 6. Connecting section; 7. Guide section; 8. Abutment portion; 9. Limiting protrusion. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] The press-fit terminal provided in this embodiment includes: a base 1, an insert 2 arranged at the lower end of the base 1, and a plug-in portion 3 connected by a deformable member 5; the insert is inserted into the socket of the circuit board 4, and the base 1 is pushed so that the insert 2 gradually enters the slot of the plug-in portion 3 to achieve electrical connection between the plug-in portion 3 and the socket; the insert 2 gradually enters the slot so that the force exerted by the plug-in portion 3 on the socket can be controlled, so that the circuit board 4 can be protected; at the same time, this structure can achieve very low insertion force and very high fixing force.

[0047] like Figure 1 As shown, the lower end of the middle part of the base 1 is connected to one end of the insert 2, and the other end of the insert 2 extends downward; the cross-sectional width of the insert 2 decreases toward the extension end; two deformable members 5 are symmetrically arranged around the central axis of the insert 2; the deformable members 5 are elastic members arranged in a bent manner; the upper ends of the two deformable members 5 are respectively connected to the two sides of the base 1, and the lower ends are connected to the plug-in portion 3;

[0048] Specifically, the plug-in portion 3 includes a connecting section 6 directly connected to the deformable member 5, the connecting section 6 has spaced-apart clamping rods, the outer side of the clamping rods are suitable for clamping with the side wall of the socket, and a slot with an opening facing upward for the insert 2 is formed between the two clamping rods.

[0049] An abutment portion 8 is provided above the connecting section 6, and the abutment portion 8 has an abutment surface. When the terminal and the circuit board 4 are connected, the abutment surface abuts against the end surface of the jack to fix the position between the terminal and the circuit board 4 so that the terminal will not be inserted too far when inserted into the circuit board 4.

[0050] A guide section 7 is connected below the connecting section 6, and the cross-sectional width of the guide section 7 gradually decreases downwards; the guide section 7 is arranged to guide the connecting section 6 when it enters the insertion hole, so as to facilitate the entry.

[0051] like Figure 2 As shown, a limiting protrusion 9 is provided between the connecting section 6 and the guiding section 7. There are two limiting protrusions 9, which are respectively provided on the inner wall of the slot and extend toward the center of the slot. When the connecting section 6 and the jack are connected, the setting of the limiting protrusion 9 makes it impossible for the connecting section 6 to be easily removed from the jack, which can play a role in preventing the terminal from retreating.

[0052] like Figure 3 As shown, the surface of the insert 2 for contacting the inner wall of the slot of the plug-in portion 3 is a push surface, and the angle formed by the push surface and the central axis of the insert 2 is α, and the angle range of α is 5.5° to 6.5°; within this angle range, the terminal and the socket have the best insertion force and fixing force during the plugging and unplugging process.

[0053] During the installation process, if Figure 4 As shown, the terminal is aligned with the jack of the circuit board 4; Figure 5 As shown, the guide section 7 of the terminal is first inserted into the jack hole, and gradually, the connecting section 6 of the terminal is completely inserted into the jack; the end surface of the circuit board 4 abuts against the abutting surface of the abutting portion 8; Figure 6 As shown, push the base 1 downward, drive the lower end of the insert 2 into the slot of the plug-in part 3, and at the same time, the deformable part 5 bends and deforms; as the insert 2 enters the slot, since the push surface of the insert 2 is inclined, as the insert 2 is inserted into the slot, the insert 2 will bring an outward linear force, so that the clamping rod moves outward, and the outer side of the clamping rod is completely in contact with the side wall of the socket to achieve electrical connection; stop pushing the base 1; the push surface of the insert 2 and the inner wall of the slot generate friction resistance, which plays a fixing role, so that the insert 2 will be fixed in the slot, so that the connection part and the socket are continuously connected. At the same time, a limit convex point 9 is set on the inner wall of the slot, so that the cross-sectional width of the connection part at the limit convex point 9 is slightly larger than the cross-sectional width at the top, to ensure that the terminal will not easily fall out of the socket of the circuit board 4.

[0054] Usage and principle

[0055] Fix the circuit board 4, and the plug-in part 3 of the terminal gradually enters the plug hole of the circuit board 4 until the circuit board 4 abuts against the abutting part 8 of the terminal; push the base 1, and the insert 2 gradually enters the slot. When the force between the connecting part and the plug hole reaches a certain requirement, stop pushing the base 1.

[0056] Since the force between the connecting portion and the socket is controlled by the amount of the insert 2 entering the slot, the force between the connecting portion and the socket is controllable, thereby preventing damage to the side walls of the socket and causing damage to the circuit board 4; at the same time, the terminal can control the amount of the insert 2 entering the slot according to the size of the socket, thereby achieving a fixed connection force between the connecting portion and the socket. Therefore, the terminal can adapt to different socket apertures, that is, the terminal has a wider versatility.

[0057] Example 2

[0058] The connector provided in this embodiment includes the press-fit terminal described in Embodiment 1.

[0059] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A press-fit terminal, characterized in that: include: base (1); An insert (2) having one end connected to the lower end of the base (1) and the other end extending downward; the cross-sectional width of the insert (2) gradually decreases toward the extended end; The plug-in portion (3) is connected to the base portion (1) via a deformable member (5); the plug-in portion (3) has a slot opening facing the inserting member (2); the plug-in portion (3) includes a connecting section (6) having spaced-apart clamping rods, the outer side of the clamping rods being suitable for clamping with the side wall of the insertion hole; a slot is provided between the clamping rods, and the plug-in portion (3) also includes a guide section (7) connected below the connecting section (6); the cross-sectional width of the guide section (7) gradually decreases downwards; The abutment portion (8) is arranged at the upper end of the plug-in portion (3); the abutment portion (8) has an abutment surface, and the abutment surface is suitable for abutting against the end surface of the plug hole.

2. The press-fit terminal according to claim 1, characterized in that: Also includes: A limiting protrusion (9) is arranged on the inner wall of the slot; the limiting protrusion (9) extends toward the center of the slot.

3. The press-fit terminal according to claim 2, characterized in that: The plug-in portion (3) comprises a connecting section (6) and a guiding section (7), and the limiting protrusion (9) is arranged between the connecting section (6) and the guiding section (7).

4. The press-fit terminal according to any one of claims 1 to 3, characterized in that: The deformable member (5) is an elastic member that is bent.

5. The press-fit terminal according to claim 4, characterized in that: The deformable members (5) have at least two evenly distributed around the central axis of the insert (2).

6. The press-fit terminal according to claim 1, characterized in that: The surface of the insert (2) that contacts the inner wall of the slot of the plug-in portion (3) is a push surface, and the angle formed between the push surface and the central axis of the insert (2) is 5.5° to 6.5°.

7. A connector, characterized in that: The invention comprises the press-fit terminal according to any one of claims 1 to 6.

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