A high stability sheath connector for piercing terminals

Abstract

The present invention relates to a high-stability double-layer sheath connector for piercing terminals, comprising a sheath, a fixed cover plate and a positioning plug block, wherein the sheath comprises a sheath body, in which two layers of plug-in channels are opened in parallel, and the head of the piercing terminal is locked inside the plug-in channel; the fixed cover plate comprises a fixed cover plate body and a positioning channel penetrating the fixed cover plate body, the fixed cover plate is butted against one end of the sheath near the tail of the piercing terminal, so that the FPC part near the tail of the piercing terminal passes through the positioning channel; the positioning plug block is inserted into the positioning channel, so that the FPC part is clamped between the positioning plug block and the inner wall of the positioning channel. Compared with the prior art, the present invention forms an auxiliary positioning mechanism by adding a fixed cover plate and a positioning plug block, so that the force point and stress point will not be at the connection between the FPC and the terminal, and the FPC will not transmit force to the inside of the sheath and the terminal when shaking, which significantly improves the reliability of the FPC and the connector.

Description

Technical Field

[0001] The invention relates to the field of connectors, in particular to a high-stability sheath connector for a piercing terminal. Background Art

[0002] The connection structure between the terminal and the signal line of the piercing structure connector eliminates the need for welding between the terminal and the core wire of the electrical connector, thus avoiding various problems caused by welding. Figure 2 The head 3 of the piercing terminal is clamped in the sheath 1. After the claw of the tail 4 of the piercing terminal pierces the FPC board, the piercing claw is curled by crimping and wrapped on the FPC gold finger to achieve the connection between the two conductors and meet the electrical requirements.

[0003] After the existing piercing terminal is crimped onto the FPC and assembled into the sheath connector, because the FPC is a soft board, the sheath plus the terminal's own weight will cause the connector and FPC to sway and shake. Figure 7 , which will cause failure in the crimping position of the terminal and FPC. Typical failures include: increased crimping resistance, damage to the FPC, and severe cases may cause the FPC and the terminal to break during crimping. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a high-stability sheath connector for piercing terminals.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The high-stability double-layer sheath connector for piercing terminals of the present invention comprises a sheath, a fixed cover plate and a positioning plug, wherein specifically:

[0007] The sheath comprises a sheath body, in which two layers of plug-in channels are opened in parallel, and the piercing terminal heads are buckled and locked inside the plug-in channels;

[0008] The fixed cover plate includes a fixed cover plate body and a positioning channel penetrating the fixed cover plate body, the fixed cover plate is butted against one end of the sheath near the tail of the piercing terminal, so that the FPC part near the tail of the piercing terminal passes through the positioning channel;

[0009] The positioning plug is inserted into the positioning channel so that the FPC part is clamped between the positioning plug and the inner wall of the positioning channel.

[0010] Furthermore, the positioning plug is made of elastic material. The elastic material enables the positioning plug to form an interference fit with the inner wall surface of the positioning channel of the fixed cover plate, so that the FPC part is fully sandwiched between the two, is fully limited, and avoids structural damage caused by shaking during use.

[0011] Furthermore, the positioning plug block is a block with an X-shaped cross section, including a first panel, a second panel and a middle connecting block.

[0012] Furthermore, when the positioning block is inserted into the positioning channel, the maximum gap width between the first panel, the second panel and the inner wall of the positioning channel is smaller than the thickness of the FPC part, so that the positioning block can form an interference fit with the inner wall of the positioning channel of the fixed cover plate.

[0013] Furthermore, the first panel and the second panel are concave from both sides toward the middle connecting block to form a concave arc surface.

[0014] Furthermore, when the positioning plug is inserted into the positioning channel, the first panel, the second panel and the FPC part all form line contact. The design of the concave arc surface can form four contact lines between the first panel, the second panel and the FPC part. Compared with the plane contact, the four line contacts in the technical method can achieve a greater pressure at the contact part, and can achieve a better clamping and limiting effect on the FPC part.

[0015] Furthermore, the width of the first panel and the second panel in the direction of the positioning plug is smaller than the depth of the positioning channel, so as to ensure that the edges of the first panel and the second panel are pressed against the FPC part, rather than the changing edge of the positioning channel being pressed against the FPC part, thereby avoiding the outward expansion of the contact line, thereby avoiding the bending of the FPC part caused by the outward expansion of the contact line.

[0016] Furthermore, a first slot is provided on the inner wall of the top of the sheath, and a first convex buckle matching the first slot is provided on the outer wall of the fixed cover plate.

[0017] Furthermore, second slots are provided on both sides of the sheath along the plugging direction of the positioning plug-in block.

[0018] Furthermore, side guide grooves are provided on both sides of the fixed cover plate, and second convex buckles are provided on both sides of the positioning plug;

[0019] When the positioning plug is plugged into the fixed cover plate, the second protrusion extends from the side guide groove, and when the positioning plug reaches the maximum plugging stroke, the second protrusion is snapped into the second slot. The snap fit between the second protrusion and the second slot further improves the tightness of the connection between the fixed cover plate and the sheath by the positioning plug.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1) In this technical solution, a fixed cover plate and a positioning plug are added to form an auxiliary positioning mechanism, so as to protect the FPC and the connector from shaking, so that the force points and stress points will not be at the connection between the FPC and the terminal. When the FPC shakes, the force will not be transmitted to the inside of the sheath and the terminal, which significantly improves the reliability of the FPC and the connector;

[0022] 2) The design of the elastic positioning block in the technical solution can form an interference fit with the inner wall surface of the positioning channel of the fixed cover plate, so that the FPC part is fully clamped between the two and is fully limited, and structural damage caused by shaking during use is avoided.

[0023] 3) It is easy to install and disassemble, and can realize mechanized large-scale automated installation. The transfer efficiency is extremely high, and large-scale production can be carried out through molds. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an assembly diagram of the sheath connector for the piercing terminal of the present invention after being crimped to the FPC;

[0025] Figure 2 This is an assembly effect diagram of the piercing terminal after crimping the FPC in the present invention;

[0026] Figure 3 This is an exploded structural diagram of the sheath connector for the piercing terminal of the present invention after being crimped to the FPC;

[0027] Figure 4 It is a cross-sectional view of a fixed cover plate and a positioning plug in a sheath connector for a piercing terminal in the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the sheath in the present invention;

[0029] Figure 6 It is an overall cross-sectional structural diagram of the sheath connector in the present invention;

[0030] Figure 7 The figure is an overall cross-sectional structural diagram of a sheath connector in the prior art.

[0031] In the figure: 1, sheath, 2, fixed cover plate, 3, piercing terminal head, 4, piercing terminal tail, 5, positioning plug, 6, FPC part, 11, sheath body, 12, plug-in channel, 13, first card slot, 14, second card slot, 21, fixed cover plate body, 22, positioning channel, 23, first convex buckle, 24, side guide groove, 51, first panel, 52, second panel, 53, middle connecting block, 54, concave arc surface, 55, second convex buckle. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example

[0034] The high-stability double-layer sheath connector for piercing terminals in this embodiment includes a sheath 1, a fixed cover plate 2 and a positioning plug 5. Figure 1 .

[0035] The sheath 1 part includes a sheath body 11, in which two layers of plug-in channels 12 are opened in parallel, and the piercing terminal head 3 is locked inside the plug-in channel 12;

[0036] The fixed cover plate 2 part includes a fixed cover plate body 21 and a positioning channel 22 that passes through the fixed cover plate body 21. The fixed cover plate 2 is connected to one end of the sheath 1 close to the piercing terminal tail 4, so that the FPC part 6 close to the piercing terminal tail 4 passes through the positioning channel 22. . A first card slot 13 is provided on the inner wall of the top of the sheath 1, and a first convex buckle 23 matching the first card slot 13 is provided on the outer wall of the fixed cover plate 2. Second card slots 14 are provided on both sides of the sheath 1 along the plug-in direction of the positioning plug 5. Side guide grooves 24 are provided on both sides of the fixed cover plate 2, and second convex buckles 55 are provided on both sides of the positioning plug 5; when the positioning plug 5 is plugged into the fixed cover plate 2, the second convex buckle 55 extends from the side guide groove 24, and when the positioning plug 5 reaches the maximum plug-in stroke, the second convex buckle 55 is inserted into the second card slot 14. The snap fit between the second protrusion 55 and the second snap groove 14 further improves the tightness of the connection between the positioning plug 5 and the fixed cover plate 2 and the sheath 1 .

[0037] Positioning plug 5: inserted into the positioning channel 22, so that the FPC part 6 is clamped between the positioning plug 5 and the inner wall of the positioning channel 22. The positioning plug 5 is made of elastic material. The elastic material allows the positioning plug 5 to form an interference fit with the inner wall surface of the positioning channel 22 of the fixed cover plate 2, so that the FPC part 6 is fully clamped between the two, fully limited, and avoids structural damage caused by shaking during use.

[0038] The positioning block 5 is a block with an X-shaped cross-section, including a first panel 51, a second panel 52 and a middle connecting block 53. When the positioning block 5 is inserted into the positioning channel 22, the maximum gap width between the first panel 51, the second panel 52 and the inner wall surface of the positioning channel 22 is less than the thickness of the FPC part 6. This allows the positioning block 5 to form an interference fit with the inner wall surface of the positioning channel 22 of the fixed cover plate 2. The first panel 51 and the second panel 52 are concave from both sides to the middle connecting block 53 to form a concave arc surface 54. The design of the concave arc surface 54 can form four contact lines between the first panel 51 and the second panel 52 and the FPC part 6, which can achieve a better limiting effect on the FPC part 6. When the positioning block 5 is inserted into the positioning channel 22, the first panel 51, the second panel 52 and the FPC part 6 are all in line contact. The design of the concave arc surface 54 can form four contact lines between the first panel and the second panel and the FPC part. Compared with the plane contact, the four line contact in the present technology can achieve a greater pressure at the contact part, and can achieve a better clamping and limiting effect on the FPC part. The width of the first panel 51 and the second panel 52 in the insertion direction of the positioning plug 5 is less than the depth of the positioning channel 22. Ensure that the edges of the first panel 51 and the second panel 52 are crimped to the FPC part 6, rather than the edge of the positioning channel 22 being crimped to the FPC part 6, to avoid the outward expansion of the contact line, thereby avoiding the bending of the FPC part due to the outward expansion of the contact line.

[0039] The assembly process of the sheath connector for the piercing terminal in this embodiment is as follows:

[0040] 1. Insert the fixed cover plate 2 into the FPC;

[0041] 2. The PFC is installed into the sheath 1, and the piercing terminal head 3 is locked and fixed through the insertion channel 12;

[0042] 3. Buckle the fixed cover plate 2 into the sheath 1 and fix it by the locking assembly between the fixed cover plate 2 and the sheath 1;

[0043] 4. Buckle the positioning plug 5 into the fixed cover plate 2 from between the two PFCs; the positioning plug 5 is fixed by the locking assembly between it and the sheath 1, so that the fixed cover plate 2 is limited twice.

[0044] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A high stability double-layer sheath connector for piercing terminals, characterized in that: include: The sheath (1) comprises a sheath body (11), in which two layers of plug-in channels (12) are arranged in parallel, and the piercing terminal head (3) is locked inside the plug-in channel (12); A fixed cover plate (2) comprises a fixed cover plate body (21) and a positioning channel (22) penetrating the fixed cover plate body (21); the fixed cover plate (2) is butted against one end of the sheath (1) close to the piercing terminal tail (4), so that the FPC portion (6) close to the piercing terminal tail (4) passes through the positioning channel (22); The positioning plug (5) is inserted into the positioning channel (22), so that the FPC portion (6) is clamped between the positioning plug (5) and the inner wall of the positioning channel (22); The positioning plug (5) is made of elastic material; The positioning plug block (5) is a block with an X-shaped cross section, comprising a first panel (51), a second panel (52) and a middle connecting block (53); When the positioning plug (5) is inserted into the positioning channel (22), the maximum gap width between the first panel (51), the second panel (52) and the inner wall surface of the positioning channel (22) is smaller than the thickness of the FPC portion (6); The first panel (51) and the second panel (52) are concave from both sides toward the middle connecting block (53) to form a concave arc surface (54); When the positioning plug (5) is inserted into the positioning channel (22), the first panel (51), the second panel (52) and the FPC part (6) are all in line contact; The width of the first panel (51) and the second panel (52) in the insertion direction of the positioning plug (5) is smaller than the depth of the positioning channel (22); The sheath (1) is provided with second slots (14) on both sides; Side guide grooves (24) are provided on both sides of the fixed cover plate (2), and second protruding buckles (55) are provided on both sides of the positioning plug block (5); When the positioning plug (5) is plugged into the fixed cover plate (2), the second protrusion (55) extends out from the side guide groove (24), and when the positioning plug (5) reaches the maximum plugging stroke, the second protrusion (55) is snapped into the second snap groove (14).

2. A high stability double-layer sheath connector for piercing terminals according to claim 1, characterized in that: A first slot (13) is provided on the inner wall at the top of the sheath (1), and a first convex buckle (23) matching the first slot (13) is provided on the outer wall of the fixed cover plate (2).

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