PCB wiring terminal

Abstract

The utility model relates to the technical field of PCB wiring terminals, and especially relates to a PCB wiring terminal. Comprising a base, a power connection insertion block vertically fixed to the lower portion of the left end of the base, a plurality of installation holes formed between the power connection insertion block and the base at equal intervals, power connection copper pipes inserted into the inner sides of the installation holes, and fastening screws installed at the upper end of the base in a screwed mode through threads and facing the power connection copper pipes. And an anti-falling mechanism used for assisting in fixing after the electric wire is inserted into the power connection copper pipe is arranged between the front end and the rear end of the base. According to the utility model, an original power connection terminal is scientifically and rationally improved, the U-shaped rotating stand which can be adjusted in a sliding manner is additionally arranged on the base, and the wire plugging hole, the anti-retreating elastic sheet and the friction sheet are arranged on the U-shaped rotating stand, so that an electrically connected wire part can be subjected to anti-retreating limiting treatment; therefore, the problem of displacement or falling of the wire when the wire is stressed is reduced, and the stability of the electric connection of the PCB wiring terminal is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB connection terminals, in particular to a PCB connection terminal. Background Art

[0002] The terminal blocks used in the electrical connection of printed circuit boards are called PCB terminal blocks or PCB connectors in the industry. They are an accessory product used to achieve electrical connections. There are no parts on the standard PCB and it is often called a printed circuit board.

[0003] like Figure 4 As shown in the figure, it is a previous generation of PCB terminal structure, whose main function is to establish a hub for electrical connection between the external circuit and the internal circuit of the PCB. However, this type of PCB terminal has the following shortcomings in actual use: since the conductor part of the wire is fixed in the copper tube for connecting the power supply by fastening screws, the contact area between the fastening screws and the conductor part is limited, which leads to the problem that when the wire is pulled by external force, the conductor part is easily displaced or falls off in the copper tube for connecting the power supply, thereby reducing the stability of the wire connection to the PCB terminal.

[0004] In view of this, it is particularly important to design and manufacture a PCB terminal that can effectively reduce the force displacement or falling off of the wire and improve the stability of the electrical connection in the design, manufacture and actual use of the PCB terminal. Utility Model Content

[0005] The utility model aims to solve the problem that the electric wires of the conventional PCB terminal blocks are easily displaced or fall off in the copper tube for connecting the wires due to external forces, resulting in poor electrical connection stability.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A PCB terminal comprises a base, a power connection plug block vertically fixed below the left end of the base, a plurality of mounting holes equidistantly arranged between the power connection plug block and the base, a power connection copper tube inserted inside the plurality of mounting holes, and a fastening screw screwed and installed at the upper end of the base and facing the power connection copper tube through threaded engagement, wherein an anti-slip mechanism is arranged between the front end and the rear end of the base for assisting in fixing the wire after the wire is inserted into the power connection copper tube.

[0008] As a further description of the above technical solution:

[0009] The anti-slip mechanism includes a U-shaped rotating frame movably installed between the front end and the rear end of the base, a wire insertion hole opened on the horizontal end of the U-shaped rotating frame and facing multiple copper tubes for connecting electricity, two anti-retraction spring plates symmetrically fixed on the inner side of the wire insertion hole and distributed in an inclined manner, and a friction plate fixed on the opposite ends of the two anti-retraction spring plates and distributed in parallel.

[0010] As a further description of the above technical solution:

[0011] The two vertical ends of the U-shaped rotating frame are fixedly connected with sliding columns penetrating the front end and the rear end of the base, and the front end and the rear end of the base are both provided with L-shaped sliding grooves for accommodating the sliding columns.

[0012] As a further description of the above technical solution:

[0013] The lower end of the base is provided with an embedded groove for accommodating the horizontal end of the U-shaped rotating frame.

[0014] As a further description of the above technical solution:

[0015] The right end of the power-connecting copper tube is located below the fastening screw and is provided with a wire locking portion for stably fixing the conductor part of the electric wire on the power-connecting copper tube.

[0016] As a further description of the above technical solution:

[0017] The wire locking part comprises a wire-supporting copper sheet fixed integrally to the right end of the power-connecting copper tube and having an open upper end, an insulating rubber sleeve sleeved on the outside of the wire-supporting copper sheet, and a lower slot opened on the inside of the insulating rubber sleeve and matching the wire-supporting copper sheet.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0019] 1. In the utility model, the original power terminal is scientifically and rationally improved, a slidably adjustable U-shaped rotating frame is newly added on the base, and a wire insertion hole, an anti-retraction spring sheet and a friction sheet are arranged on the U-shaped rotating frame. The conductor part that needs to be inserted into the power copper tube can be pre-inserted through the wire insertion hole at the corresponding position on the U-shaped rotating frame. The two anti-retraction spring sheets in the wire insertion hole can guide the conductor part to be inserted into the power copper tube. When the wire is pulled backward, the combined effect of the elastic force between the two anti-retraction spring sheets and the friction force between the friction sheets can increase the resistance of the wire to be pulled out of the power copper tube to resist the pulling effect of the external force. This structure can perform anti-retraction and limit treatment on the wire part after electrical connection, reduce the occurrence of displacement or falling off of the wire when it is subjected to force, and thus improve the stability of the electrical connection of the PCB terminal.

[0020] 2. In the utility model, the original partially opened copper tube structure is upgraded, and a wire-supporting copper sheet and an insulating rubber sleeve are arranged on the copper tube. When the fastening screw moves downward, the insulating rubber sleeve can be squeezed to deform and fully fit the conductor part. The insulating rubber sleeve can insulate and isolate the fastening screw and the conductor part, and at the same time increase the contact area between the lower end of the fastening screw and the conductor part. This structure can insulate the conductor part of the wire on the wire-supporting copper sheet, increase the contact area and locking force of the conductor part installed between the copper tube and the fastening screw, thereby further improving the stability and safety of the electrical connection of the PCB terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a PCB terminal block proposed by the utility model;

[0022] Figure 2 It is a three-dimensional working schematic diagram of the utility model;

[0023] Figure 3 It is a three-dimensional disassembly schematic diagram of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the previous generation of PCB terminal blocks in the prior art.

[0025] Legend:

[0026] 1. Base; 101. Power connection block; 102. Mounting hole; 103. L-shaped slide groove; 104. Embedded groove; 2. Power connection copper tube; 201. Wire support copper sheet; 3. Fastening screws; 4. U-shaped rotating frame; 401. Wire insertion hole; 402. Anti-retraction spring sheet; 403. Friction plate; 404. Sliding column; 5. Insulating rubber sleeve; 501. Lower slot. DETAILED DESCRIPTION

[0027] 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 only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-3The utility model provides a technical solution: a PCB terminal block, comprising a base 1, a power connection plug block 101 vertically fixed at the lower left end of the base 1, a plurality of mounting holes 102 equidistantly arranged between the power connection plug block 101 and the base 1, a power connection copper tube 2 inserted inside the plurality of mounting holes 102, and a fastening screw 3 installed at the upper end of the base 1 by threaded engagement and facing the power connection copper tube 2, and an anti-slip mechanism for auxiliary fixation of the wire after it is inserted into the power connection copper tube 2 is arranged between the front end and the rear end of the base 1.

[0029] Specifically, Figure 1-3 As shown, the anti-slip mechanism includes a U-shaped rotating frame 4 movably installed between the front and rear ends of the base 1, a wire insertion hole 401 opened on the horizontal end of the U-shaped rotating frame 4 and facing the multiple power connection copper tubes 2, two anti-retraction spring pieces 402 symmetrically fixed on the inner side of the wire insertion hole 401 and inclinedly distributed, and a friction plate 403 fixed on the opposite ends of the two anti-retraction spring pieces 402 and distributed in parallel, which can increase the contact area and friction force between the ends of the two anti-retraction spring pieces 402 and the outer wall of the wire. The two inclined anti-retraction spring pieces 402, when the wire is inserted along the inclined direction of the anti-retraction spring pieces 402, the two anti-retraction spring pieces 402 will not prevent the wire portion from being inserted into the power connection copper tube 2. When the wire portion is pulled out from the power connection copper tube 2, the two anti-retraction spring pieces 402 will squeeze and bite the wire portion, preventing the wire portion from continuing to slide outward in the wire insertion hole 401, thereby increasing the resistance of the wire portion to slide out of the power connection copper tube 2.

[0030] Among them, the two vertical ends of the U-shaped rotating frame 4 are fixedly connected with sliding columns 404 that penetrate the front and rear ends of the base 1. The front and rear ends of the base 1 are provided with L-shaped sliding grooves 103 for accommodating the sliding columns 404. The settings of the sliding columns 404 and the L-shaped sliding grooves 103 can, on the one hand, limit the range of movement of the U-shaped rotating frame 4 on the base 1, and on the other hand, facilitate the vertical hiding and storage of the U-shaped rotating frame 4 and the adjustment operation of the horizontal working state.

[0031] At the same time, the lower end of the base 1 is provided with an embedded groove 104 for accommodating the horizontal end of the U-shaped rotating frame 4, so that the horizontal end of the U-shaped rotating frame 4 can be hidden and stored in the lower end of the base 1, thereby facilitating the removal and transportation of the terminal block.

[0032] Specifically, Figure 1-3As shown, the right end of the power-connecting copper tube 2 is located below the fastening screw 3 and is provided with a wire locking portion for stably fixing the conductor part of the wire on the power-connecting copper tube 2. The wire locking portion includes a wire-supporting copper sheet 201 which is integrally fixed to the right end of the power-connecting copper tube 2 and has an open upper end, an insulating rubber sleeve 5 which is sleeved on the outside of the wire-supporting copper sheet 201, and a lower slot 501 which is opened on the inner side of the insulating rubber sleeve 5 and matches the wire-supporting copper sheet 201. The setting of the lower slot 501 facilitates the positioning and installation of the insulating rubber sleeve 5 between the wire-supporting copper sheet 201 and the power-connecting copper tube 2. At the same time, the setting of the insulating rubber sleeve 5 can, on the one hand, increase the contact area and locking force between the fastening screw 3 and the conductor part of the wire, thereby improving the stability of the wire after connection. On the other hand, the fastening screw 3 and the conductor part of the wire can be insulated and blocked to prevent leakage at the fastening screw 3 when the circuit is energized.

[0033] Working principle: When not in use (such as Figure 1 As shown in the figure, the horizontal end of the U-shaped rotating frame 4 is hidden and stored in the embedded groove 104 of the base 1. When it is necessary to establish an electrical connection between the wire and the terminal block, the operator can slide the U-shaped rotating frame 4 downward from the embedded groove 104. At this time, the sliding column 404 on the U-shaped rotating frame 4 will slide from the vertical end of the L-shaped slide groove 103 into the horizontal end, and the U-shaped rotating frame 4 can be rotated 90° to a horizontal state, and the sliding column 404 of the U-shaped rotating frame 4 can be slid and adjusted to the outermost side of the horizontal end of the L-shaped slide groove 103 (as shown in the figure). Figure 2 As shown in the figure, the conductor part of the wire can be slid into between the wire supporting copper sheet 201 and the insulating rubber sleeve 5 of the power connection copper tube 2 through the wire insertion hole 401 at the corresponding position on the U-shaped rotating frame 4, and then the fastening screw 3 can be driven by a screwdriver to rotate downward to squeeze the insulating rubber sleeve 5, so that the conductor part of the wire can be comprehensively squeezed and locked on the power connection copper tube 2. Under the combined effect of the elastic force between the two anti-retraction spring sheets 402 and the friction force between the friction sheets 403, the resistance of the wire part to be pulled out of the power connection copper tube 2 can be increased, which can effectively resist the pulling effect of external force and prevent the conductor part of the wire from being displaced or falling off in the power connection copper tube 2.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PCB terminal block, comprising a base (1), a power connection plug (101) vertically fixed at the lower left end of the base (1), a plurality of mounting holes (102) equidistantly arranged between the power connection plug (101) and the base (1), a power connection copper tube (2) inserted inside the plurality of mounting holes (102), and a fastening screw (3) screwed on the upper end of the base (1) and facing the power connection copper tube (2), characterized in that: An anti-drop mechanism is provided between the front and rear ends of the base (1) for assisting in fixing the electric wire after it is inserted into the power connection copper tube (2); The anti-slip mechanism comprises a U-shaped rotating frame (4) movably mounted between the front end and the rear end of the base (1), a wire insertion hole (401) provided on the horizontal end of the U-shaped rotating frame (4) and facing the plurality of copper tubes (2) for connecting electricity, two anti-retraction spring plates (402) symmetrically fixed on the inner side of the wire insertion hole (401) and arranged in an inclined manner, and a friction plate (403) fixed on the opposite ends of the two anti-retraction spring plates (402) and arranged in parallel.

2. A PCB terminal according to claim 1, characterized in that: The two vertical ends of the U-shaped rotating frame (4) are fixedly connected with sliding columns (404) that penetrate the front and rear ends of the base (1), and the front and rear ends of the base (1) are both provided with L-shaped sliding grooves (103) for accommodating the sliding columns (404).

3. A PCB terminal according to claim 1, characterized in that: The lower end of the base (1) is provided with an embedded groove (104) for accommodating the horizontal end of the U-shaped rotating frame (4).

4. A PCB terminal according to claim 1, characterized in that: The right end of the power connection copper tube (2) is located below the fastening screw (3) and is provided with a wire locking portion for stably fixing the conductor part of the electric wire on the power connection copper tube (2).

5. A PCB terminal according to claim 4, characterized in that: The wire locking portion comprises a wire-supporting copper sheet (201) integrally fixed to the right end of the power connection copper tube (2) and having an open upper end, an insulating rubber sleeve (5) sleeved on the outside of the wire-supporting copper sheet (201), and a lower slot (501) opened on the inner side of the insulating rubber sleeve (5) and matching the wire-supporting copper sheet (201).

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