Elastic grounding structure for shielding terminal of terminal block

Abstract

The utility model discloses an elastic grounding structure for a shielding terminal of a terminal block, which is characterized in that an accommodating slot is arranged in a flange on the outer side of the terminal block, and a positioning connecting end and a connecting nut of the shielding terminal are inserted into the accommodating slot in an up-and-down stacking manner; the connecting bolt sequentially penetrates through the metal shell and the penetrating hole in the upper side wall of the terminal block outer side flange containing slot and is finally screwed and locked with the connecting nut, the positioning connecting end of the shielding terminal is tightly clamped between the upper side wall of the terminal block outer side flange containing slot and the connecting nut, and the shielding terminal is further provided with an elastic contact part which can elastically deform up and down. And an elastic contact part at one end of the shielding terminal extends out of the outer side of the upper end of the terminal block outer side flange through a hollow avoiding opening in the upper side wall of the terminal block outer side flange accommodating slot and elastically abuts against the surface of the lower end of the metal shell. The shielding structure is ensured to fully shield external interference signals, and the service life of the shielding structure is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a plug-in terminal block, especially to a terminal block shielding terminal elastic grounding structure. BACKGROUND

[0002] The current plug-in terminal block wire harness metal shell and the metal shielding terminal conducting structure installed on the two side flanges are as follows: a nut is installed on the outside flange on the two sides of the terminal block, one end of the shielding terminal is inserted into the outside flange and tightly contacts the nut, the other end of the shielding terminal forms a grounding foot for grounding, the one end of the shielding terminal and the metal shell are both provided with a through hole, the screw rod of the bolt passes through the through hole on the metal shell and is inserted into the outside flange and passes through the through hole on the one end of the shielding terminal, and finally is screwed with the nut, that is, the bolt and the nut are indirectly conducted through the screw thread, the grounding function is realized, and the conducting transmission mode of the metal shell and the shielding terminal is: metal shell - screw thread - shielding terminal - grounding, which causes unstable grounding connection of the metal shell, easily causes open circuit, and affects the shielding effect of external interference signals. SUMMARY

[0003] In order to make up for the above shortcomings, the utility model provides a terminal block shielding terminal elastic grounding structure, which has stable electric signal transmission, good shielding effect on external interference signals and long service life.

[0004] The utility model discloses a terminal block shielding terminal elastic grounding structure, including metal shell, shielding terminal, connecting bolt and connecting nut, and the end of the terminal block is the upper end that is opposite to the circuit board welded and connected, the metal shell covers the upper end surface of the outside flange of the terminal block, the outside flange in the terminal block is equipped with the accommodating slot, one end of shielding terminal is the positioning connecting end, the other end of shielding terminal is the grounding foot that can form and realize the electric connection of circuit board and ground, the positioning connecting end of shielding terminal and connecting nut are inserted in the accommodating slot and are stacked, the through hole of the screw thread hole of connecting nut is opposite in the metal shell and the upper lateral wall of the accommodating slot of the outside flange of the terminal block, and the connecting bolt passes through the through hole of the metal shell and the upper lateral wall of the accommodating slot of the outside flange of the terminal block in proper order and is finally screwed with the connecting nut and locked, and the positioning connecting end of shielding terminal is tightly clamped between the upper lateral wall of the accommodating slot of the outside flange of the terminal block and the connecting nut, the one end of shielding terminal is still equipped with the elastic contact part that can be elastically deformed up and down, and the upper lateral wall of the accommodating slot of the outside flange of the terminal block is still equipped with the hollow avoiding mouth that the elastic contact part of the one end of shielding terminal is stretched to the outside of the upper end of the outside flange of the terminal, and the elastic contact part of the one end of shielding terminal is stretched to the outside of the upper end of the outside flange of the terminal and elastically abuts to the lower end surface of the metal shell through the hollow avoiding mouth.

[0005] As a further improvement of the utility model, the accommodating slot on the outer flange of the terminal base is a square slot, and the connecting nut is a square nut matching the shape of the accommodating slot.

[0006] As a further improvement of the utility model, the connecting body of the shielding terminal is connected between the positioning connecting end and the grounding leg to form a Z-shaped integrated structure extending vertically, and the connecting body of the shielding terminal is covered on the side surface of the outer flange of the terminal base.

[0007] As a further improvement of the utility model, the terminal accommodating groove matching the connecting body of the shielding terminal is formed on the side surface of the outer flange of the terminal base, the connecting body of the shielding terminal is accommodated in the terminal accommodating groove, and the surface and the lower end surface of the connecting body of the shielding terminal are respectively aligned with the side surface and the lower end surface of the outer flange of the terminal base.

[0008] As a further improvement of the utility model, the positioning connecting end of the shielding terminal is an L-shaped sheet with the length of one side being smaller than the length of the other side along the depth direction of the accommodating slot, and the elastic contact part is an elastic arm structure extending obliquely upward from the side with shorter length of the L-shaped sheet, and the free end of the elastic arm structure elastically abuts against the lower end surface of the metal shell.

[0009] As a further improvement of the utility model, the elastic contact part of the shielding terminal is located at the end of the elastic arm structure to form a downwardly bent circular arc contact surface.

[0010] As a further improvement of the utility model, the positioning connecting end of the shielding terminal is provided with an avoiding hole opposite to the threaded hole of the connecting nut, and the connecting bolt can be screwed with the connecting nut through the avoiding hole.

[0011] As a further improvement of the utility model, the terminal base is provided with an outer flange at each end along the arrangement direction of the inner terminals, and the two shielding terminals are respectively mounted on the two outer flanges, and the metal shell is sleeved on the outer side of the terminal base and completely covers the pins of the terminals and the shielding terminals.

[0012] The utility model has the beneficial technical effects that the utility model sets the elastic contact part capable of being elastically deformed up and down on the positioning connecting end of the shielding terminal, realizes conduction by the elastic contact of the elastic contact part with the metal shell, realizes the grounding effect, the utility model further provides the positive pressure for the elastic contact of the metal shell and the shielding terminal by the locking of the connecting bolt and the connecting nut, guarantees the stable contact conduction of the elastic contact of the metal shell and the shielding terminal, guarantees the sufficient shielding of the shielding structure to the external interference signal, and improves the service life of the shielding structure. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1Structure principle diagram of prior art;

[0014] Figure 2 Structure principle diagram of the utility model;

[0015] Figure 3 Shielding terminal mounting on the flange outside of terminal table of the utility model is shown in the perspective view;

[0016] Figure 4 For Figure 3 A enlarged view of middle A part;

[0017] Figure 5 Shielding structure perspective view of the utility model;

[0018] Figure 6 Shielding terminal first perspective view of the utility model;

[0019] Figure 7 Shielding terminal second perspective view of the utility model. DETAILED DESCRIPTION

[0020] Embodiment: a terminal table shielding terminal elastic grounding structure, including metal shell 1, shielding terminal 2, connecting bolt 6 and connecting nut 5, set terminal table 3 back to the one end of the circuit board welded to the upper end, the metal shell 1 covers on the upper end surface of terminal table outside flange 4, the terminal table outside flange 4 is equipped with containing slot 41, shielding terminal 2 one end is the positioning connection end 21, the other end of shielding terminal 2 is the grounding foot 22 that can be formed with circuit board electrically connected and realizes grounding, the positioning connection end 21 of shielding terminal 2 and connecting nut 5 are inserted in containing slot 41, the metal shell 1 and the containing slot 41 upper side wall of terminal table outside flange 4 are all equipped with the perforation opposite with the thread hole of connecting nut 5, connecting bolt 6 sequentially passes through the perforation of metal shell 1 and the containing slot 41 upper side wall of terminal table outside flange 4 and is finally screwed with connecting nut 5 and locks tightly, the positioning connection end 21 of shielding terminal 2 is tightly clamped between the containing slot 41 upper side wall of terminal table outside flange 4 and connecting nut 5, the one end of shielding terminal 2 is still equipped with the elastic contact part 23 that can be elastically deformed up and down, the containing slot 41 upper side wall of terminal table outside flange 4 is still equipped with the hollow avoiding mouth 42 for the elastic contact part 23 of shielding terminal 2 one end to extend to the outside of terminal outside flange upper end, the elastic contact part 23 of shielding terminal 2 one end extends to the outside of terminal table outside flange 4 upper end through the hollow avoiding mouth 42 and elastically abuts against the lower end surface of metal shell 1.

[0021] The structure fixes the metal shell 1 on the outer flange of the terminal table 3 by connecting bolt 6 and connecting nut 5, and fixes the shielding terminal 2 on the outer flange of the terminal table 3, and the positive pressure of the metal shell 1 and the shielding terminal 2 is locked by the connecting bolt 6 and the connecting nut 5, so that the elastic contact part 23 on the shielding terminal 2 tightly abuts against the lower end surface of the metal shell 1, so that the metal shell 1 is directly in contact with the shielding terminal 2, which ensures the stability of the ground signal and ensures the stable shielding effect of the terminal table 3 to the external interference signal, and the structure can maintain the stable contact between the metal shell 1 and the shielding terminal 2 for a long time, and has a long service life.

[0022] The accommodating slot 41 in the outer flange 4 of the terminal table is a square slot, and the connecting nut 5 is a square nut matched with the shape of the accommodating slot 41. The square structure can prevent the connecting nut 5 from rotating when the connecting bolt 6 is locked, and the positioning connecting end 21 of the shielding terminal 2 can be integrally formed in the accommodating slot 41 of the terminal table outer flange 4 by injection molding to realize the fixed connection with the terminal table outer flange 4.

[0023] The positioning connecting end 21 and the grounding foot 22 of the shielding terminal 2 are connected by the vertically extending connecting body 24 to form a Z-shaped integrated structure, and the connecting body 24 of the shielding terminal 2 is covered on the side surface of the terminal table outer flange 4.

[0024] The terminal accommodating groove 43 matched with the connecting body 24 of the shielding terminal 2 is formed on the side surface of the terminal table outer flange 4, the connecting body 24 of the shielding terminal 2 is accommodated in the terminal accommodating groove 43, and the surface and the lower end surface of the connecting body 24 of the shielding terminal 2 are aligned with the side surface and the lower end surface of the terminal table outer flange 4, respectively.

[0025] The connecting body 24 of the shielding terminal 2 is accommodated in the accommodating groove, so that it does not protrude from the surface of the terminal table outer flange 4, avoiding interference with other parts, and further positioning the shielding terminal 2 to ensure the stability and position accuracy of the shielding terminal 2 and the external flange connection of the terminal table 3.

[0026] The positioning connecting end 21 of the shielding terminal 2 is an L-shaped sheet material with the length of one side in the depth direction of the accommodating slot 41 being less than the length of the other side, and the elastic contact part 23 is an elastic arm structure extending upwardly and obliquely from the side with shorter length of the L-shaped sheet material, and the free end of the elastic arm structure elastically abuts against the lower end surface of the metal shell 1. The shielding terminal 2 is directly stamped and bent from a metal sheet material, which improves the production efficiency of the shielding terminal 2 and the strength of the elastic contact part 23.

[0027] The elastic contact part 23 of the shielding terminal 2 is located at the end of the elastic arm structure to form a downwardly bent circular arc contact surface 231. It prevents scratching the lower end surface of the metal shell 1.

[0028] The positioning connecting end 21 of the shielding terminal 2 is provided with an avoiding hole 25 opposite to the threaded hole of the connecting nut 5, and the connecting bolt 6 can be screwed with the connecting nut 5 through the avoiding hole 25. In this way, the width of the L-shaped sheet length of the positioning connecting end 21 of the shielding terminal 2 can be designed to be relatively wide, the positioning strength in the flange 4 outside the terminal table is increased, and the positioning connecting end 21 of the shielding terminal 2 can be further limited by the connecting bolt 6 and the avoiding hole 25, so as to prevent the positioning connecting end 21 of the shielding terminal 2 from being pulled out of the flange 4 outside the terminal table.

[0029] The terminal table 3 is provided with an outside flange at each end along the arrangement direction of the inner terminals, and two shielding terminals 2 are respectively installed on the two outside flanges. The metal shell 1 is sleeved outside the terminal table 3 and completely covers the pins of each terminal of the terminal table 3 and the shielding terminals 2 outside the terminal table 3.

Claims

1. A terminal block shielding terminal elastic grounding structure, comprising a metal shell (1), a shielding terminal (2), a connecting bolt (6) and a connecting nut (5), a terminal block (3) is provided with an upper end at the end away from the circuit board to which it is welded, the metal shell covers the upper end surface of the terminal block outer flange (4), the terminal block outer flange is provided with a containing slot (41), one end of the shielding terminal is a positioning connecting end (21), the other end of the shielding terminal is a grounding foot (22) capable of being electrically connected with the circuit board to realize grounding, the positioning connecting end of the shielding terminal and the connecting nut are inserted into the containing slot in an upper and lower stacking manner, characterized in that: The metal shell and the flange outside the terminal base contain the upper side wall of the slot, and the through hole opposite to the threaded hole of the connecting nut is provided. The connecting bolt passes through the through hole of the metal shell and the flange outside the terminal base in sequence, and finally is screwed and locked with the connecting nut. The positioning connecting end of the shielding terminal is tightly clamped between the upper side wall of the flange outside the terminal base and the connecting nut. An elastic contact part (23) capable of elastic deformation up and down is arranged on one end of the shielding terminal. An openwork avoiding port (42) is arranged on the upper side wall of the flange outside the terminal base, and the elastic contact part of one end of the shielding terminal extends to the outside of the upper end of the flange outside the terminal. The elastic contact part of one end of the shielding terminal extends to the outside of the upper end of the flange outside the terminal and elastically abuts against the lower end surface of the metal shell.

2. The terminal block shield terminal spring ground structure of claim 1, wherein: The accommodating slot inside the flange outside the terminal base is a square slot, and the connecting nut is a square nut matched with the shape of the accommodating slot.

3. The terminal block shield terminal spring ground structure of claim 1 or 2, characterized by: The positioning connecting end and the grounding foot of the shielding terminal are connected by a vertically extending connecting body (24) to form a Z-shaped integrated structure. The connecting body of the shielding terminal is covered on the side surface of the flange outside the terminal base.

4. The terminal block shield terminal spring ground structure of claim 3, wherein: The terminal accommodating groove (43) matched with the connecting body of the shielding terminal is formed on the side surface of the flange outside the terminal base. The connecting body of the shielding terminal is accommodated in the terminal accommodating groove, and the surface and the lower end surface of the connecting body of the shielding terminal are aligned with the side surface and the lower end surface of the flange outside the terminal base, respectively.

5. The terminal block shield terminal spring ground structure of claim 1, wherein: The positioning connecting end of the shielding terminal is an L-shaped sheet with the length of one side along the depth direction of the accommodating slot being smaller than the length of the other side. The elastic contact part is an elastic arm structure extending upwardly and obliquely from the shorter side of the L-shaped sheet. The free end of the elastic arm structure elastically abuts against the lower end surface of the metal shell.

6. The terminal block shield terminal spring ground structure of claim 5, wherein: The elastic contact part of the shielding terminal forms a downwardly bent circular arc contact surface (231) at the end of the elastic arm structure.

7. The terminal block shield terminal spring ground structure of claim 1 or 5, characterized by: The positioning connecting end of the shielding terminal is provided with an avoiding hole (25) opposite to the threaded hole of the connecting nut. The connecting bolt can pass through the avoiding hole and be screwed with the connecting nut.

8. The terminal block shield terminal spring ground structure of claim 1, wherein: The terminal base is provided with two flanges outside the terminal base at both ends along the arrangement direction of the terminals inside the terminal base. Two shielding terminals are respectively arranged on the two flanges outside the terminal base. The metal shell is sleeved outside the terminal base and completely covers the pins of the terminals and the shielding terminals outside the terminal base.

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