Belleville spring connector

Abstract

The utility model relates to a butterfly spring connector, which is connected to a host PCB board, and includes a frame, a lower spring sheet, an upper spring sheet and a side spring sheet, wherein the frame, the lower spring sheet and the upper spring sheet are an integral stamping structure; the side spring sheet is fixed to the frame by riveting, the side spring sheet is provided with an extension plate and a clamping sheet, the extension plate is provided with a riveting boss; the clamping sheet is provided with a convex point contacting with the host PCB board; the convex point is provided with two, and point contact is formed with the host PCB board. Compared with the prior art, the utility model has the advantages of avoiding the risk of cold soldering, better strength and stability, more convenient production and assembly, and improved production efficiency.

Description

Technical Field

[0001] The utility model relates to a connector, in particular to a butterfly spring connector. Background Art

[0002] The butterfly connector is a component widely used in electrical connectors and signal connectors, and is used to connect the wiring harness and the host PCB board. The traditional butterfly connector consists of a butterfly spring and a frame. The butterfly spring includes an upper spring and a lower spring, which are connected to form an acute angle. The lower spring of the butterfly spring is connected to the frame, and the free end of the upper spring rests on the inside of the frame. The wire or cable is inserted between the free end of the upper spring and the frame to form an electrical contact.

[0003] The main problems of existing products include:

[0004] 1) The part where the butterfly spring connector is connected to the host PCB board is usually an arc structure, which is a linear contact and is prone to poor contact due to vibration and other reasons;

[0005] 2) The traditional butterfly connector butterfly spring and frame are connected by spot welding, which has complex structure and production process, and high production and assembly costs;

[0006] 3) For some butterfly connectors on the market, the side springs and the frame are integrally formed, which makes the springs prone to fatigue deformation and weakens the clamping performance.

[0007] 4) The free end of the spring on the butterfly spring connector usually has no twists and turns, and there are problems with the clamping force and extraction force being too small after connecting the wires or cables.

[0008] After searching, Chinese patent publication number CN202259804U discloses a butterfly spring connector, which specifically discloses a redesign of the shape of the steel leaf spring, adding bends to both wings of the "∠" shape to increase the clamping force and pull-out force on the wire generated by the deformation of the steel leaf spring; at the same time, a knife-shaped opening is opened at the bottom of the wire pressing frame to increase the friction with the wire. However, the existing patent still has problems such as poor contact and easy fatigue deformation of the spring sheet.

[0009] After searching, Chinese patent publication number CN105514642B discloses a butterfly spring connector. The butterfly spring connector has a bottom plate, an upper spring sheet, a lower spring sheet, a side spring sheet and a contact sheet. Although the bottom plate, the upper spring sheet, the lower spring sheet and the side spring sheet of the butterfly spring connector are an integrated stamping structure, the bottom plate has a U-shaped groove, and the strength of the whole device is poor. The spring sheet of the contact sheet is an arc structure, which forms a linear contact with the PCB board, and cannot ensure that the entire contact line is in contact at the same time. The contact impedance is unstable, and there is a large resistance to plugging and unplugging the PCB board at the same time. Utility Model Content

[0010] The purpose of the utility model is to provide a butterfly spring connector in order to overcome the defects of the prior art.

[0011] The purpose of the utility model can be achieved through the following technical solutions:

[0012] According to one aspect of the utility model, a butterfly spring connector is provided, which is connected to a host PCB board and includes a frame, a lower spring sheet, an upper spring sheet and a side spring sheet, wherein the frame, the lower spring sheet and the upper spring sheet are an integrated stamping structure;

[0013] The side spring piece is fixed to the frame by riveting. The side spring piece is provided with an extension plate and a clamping plate. The extension plate is provided with a riveted boss. The clamping plate is provided with a convex point contacting with the host PCB board. There are two convex points, which form point contact with the host PCB board.

[0014] As a preferred technical solution, the lower spring sheet is provided with an arc bend.

[0015] As a preferred technical solution, the upper spring sheet is provided with a first bend and a second bend.

[0016] As a preferred technical solution, the frame is provided with a left side wall for providing support for the lower spring sheet, a right side wall for cooperating with the upper spring sheet to compress the wiring harness, and a riveting hole for riveting the side spring sheet, and the riveting boss is riveted on the riveting hole.

[0017] As a preferred technical solution, the right side wall is in contact with the extension plate.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1) The clamping end of the side spring of the butterfly spring connector of the utility model is provided with two protrusions, which form point contact with the host PCB board, replacing the arc linear contact commonly seen on the market. When plugging and unplugging the connector, the point contact has less resistance than the linear contact, which is convenient for plugging and unplugging. At the same time, the point contact can ensure that the contact impedance of the connector is more stable and the signal transmission effect is better;

[0020] 2) The upper and lower spring plates of the butterfly spring connector of the utility model are both provided with bends, which enhance the rigidity and elasticity of the spring plates and provide better clamping force for the connected wire harness;

[0021] 3) The side spring sheet and the frame of the butterfly spring connector of the utility model are changed into two separate parts, which are fixed by riveting, replacing the common one-piece molding structure; the poor elasticity of the overall structure is improved, and it has better fatigue resistance and stability.

[0022] 4) The upper spring sheet, the lower spring sheet and the frame of the butterfly spring connector of the utility model are a unified whole, which is formed in one piece by continuous stamping; it replaces the common spot welding method on the market, avoids the risk of false welding, has better strength and stability, is more convenient for production and assembly, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0024] Figure 2 It is a side view structural schematic diagram of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the frame and upper and lower spring pieces of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the side spring piece of the utility model;

[0027] Figure 5 It is a schematic diagram of the structure of the utility model after assembly.

[0028] Wherein: 1. frame, 11. left side wall, 12. right side wall, 13. riveting hole;

[0029] 2. Lower spring piece, 21. Arc bending;

[0030] 3. Upper spring sheet, 31. First bend, 32. Second bend;

[0031] 4. Side spring piece, 41. Extension plate, 42. Clamping piece, 43. Protrusion, 44. Riveting boss. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0033] like Figure 1 As shown, the utility model is a butterfly spring connector, which is connected to a host PCB board, and includes a frame 1, a lower spring sheet 2, an upper spring sheet 3 and a side spring sheet 4. The frame 1, the lower spring sheet 2 and the upper spring sheet 3 are an integral stamping structure, and the side spring sheet 4 is fixed to the frame 1 by riveting, and point contact is adopted between the side spring sheet 4 and the host PCB board.

[0034] The upper spring sheet, lower spring sheet and frame of the butterfly spring connector of the utility model are a unified whole, which is formed in one piece by continuous stamping; it replaces the common spot welding method on the market, avoids the risk of false welding, has better strength and stability, is more convenient for production and assembly, and improves production efficiency. At the same time, the side spring sheet and frame of the butterfly spring connector are changed to two separate parts, which are fixed by riveting, replacing the common one-piece molding structure. The poor elasticity of the overall structure is improved, and it has better fatigue resistance and stability.

[0035] like Figure 3 As shown, the frame body 1 is provided with a left side wall 11 , a right side wall 12 and riveting holes 13 , and the left side wall 11 provides strength support for the lower spring sheet 2 .

[0036] like Figure 3 As shown, the lower spring piece 2 is provided with an arc bend 21, as shown in FIG. Figure 1 As shown, the upper spring sheet 3 is provided with two bends, namely a first bend 31 and a second bend 32, which enhance the strength and toughness of the spring sheet and provide better fatigue resistance.

[0037] When plugging in the wiring harness, pressure is applied to the upper spring sheet 3 to form a gap between the upper spring sheet 3 and the right side wall 12, and the wiring harness is connected. After the pressure is removed, the upper spring sheet 3 returns to its original position under the action of the elastic force, and the wiring harness is pressed. When the wiring harness is pulled out, pressure is also applied to the upper spring sheet 3, and a gap is formed again between the upper spring sheet 3 and the right side wall 12, and the wiring harness is pulled out. After the pressure is removed, the upper spring sheet 3 returns to its original position under the action of the elastic force.

[0038] like Figure 2 The side spring piece 4 shown includes an extension plate 41 and a clamping piece 42. Figure 4 As shown, a riveted boss 44 is provided on the extension plate 41, and a protrusion 43 is provided on the clamping piece 42. The side spring piece 4 rivets the riveted boss 44 into the riveting hole 13 in the frame 1 by riveting. The right side wall 12 is in contact with the extension plate 41, and the right side wall 12 provides strength support for the side spring piece 4. The side spring piece 4 is fixed to the frame 1 by riveting, replacing the common one-piece molding structure. The poor elasticity of the overall structure is improved, and it has better fatigue resistance and stability. A protrusion 43 is provided on the clamping piece 42, and the protrusion 43 contacts with the host PCB board, replacing the common arc contact on the market, and the contact impedance is more stable and the reliability is better.

[0039] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A butterfly spring connector, which is connected to a host PCB board, characterized in that: It comprises a frame body (1), a lower spring sheet (2), an upper spring sheet (3) and a side spring sheet (4), wherein the frame body (1), the lower spring sheet (2) and the upper spring sheet (3) are an integrally stamped structure; The side spring piece (4) is fixed to the frame (1) by riveting, and the side spring piece (4) is provided with an extension plate (41) and a clamping plate (42), and the extension plate (41) is provided with a riveting boss (44); the clamping plate (42) is provided with a convex point (43) that contacts the host PCB board; the convex point (43) is provided with two, and point contact is formed between the convex point (43) and the host PCB board.

2. A butterfly spring connector according to claim 1, characterized in that: The lower spring sheet (2) is provided with an arc bend (21).

3. A butterfly spring connector according to claim 1, characterized in that: The upper spring sheet (3) is provided with a first bend (31) and a second bend (32).

4. A butterfly spring connector according to claim 1, characterized in that: The frame (1) is provided with a left side wall (11) for providing support for the lower spring sheet (2), a right side wall (12) for cooperating with the upper spring sheet (3) to compress the wiring harness, and a riveting hole (13) for riveting the side spring sheet (4), and the riveting boss (44) is riveted on the riveting hole (13).

5. A butterfly spring connector according to claim 4, characterized in that: The right side wall (12) is in contact with the extension plate (41).

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