A wiring terminal with high connection reliability

Abstract

The present application relates to the field of wiring terminals, and specifically discloses a wiring terminal with high connection reliability, which includes a housing, the housing includes a first fixing group and a second fixing group, the first fixing group includes an elastic outer foot and a fixed inner foot, the second fixing group includes a fixed outer foot and an elastic inner foot, the fixed inner foot and the elastic inner foot are located between the elastic outer foot and the fixed outer foot, the elastic outer foot and the fixed inner foot are used to clamp one end of a DIN rail, and the fixed outer foot and the elastic inner foot are used to clamp the other end of the DIN rail. The present application has the effect of improving the connection reliability of the wiring terminal after installation.

Description

Technical Field

[0001] The present application relates to the field of wiring terminals, and in particular to a wiring terminal with high connection reliability. Background Art

[0002] A terminal block is an accessory or device used to achieve electrical connection, mainly used to bridge disconnected connections within a circuit or between isolated circuits.

[0003] Using DIN rails is a way to install industrial electrical components. Terminal blocks are often installed using DIN rails, so the terminal blocks usually have structures that cooperate with the DIN rails for installation.

[0004] In related technologies, such as Figure 1 The wiring terminal and DIN rail shown include a housing 1 and a DIN rail 6, wherein the housing 1 includes two mounting feet 18. When installing the wiring terminal, the wiring terminal is moved to the DIN rail 6 between the two mounting feet 18, and the wiring terminal is slid on the DIN rail 6 to move the wiring terminal to a desired position. One of the mounting feet 18 has a certain elasticity, and the distance between the two mounting feet 18 is slightly smaller than the width of the DIN rail 6, so that the two mounting feet 18 can clamp the DIN rail 6, thereby realizing the limit of the wiring terminal.

[0005] The wiring terminals are installed and limited by two mounting feet. After long-term use or multiple sliding adjustments, the reliability is poor and sliding is likely to occur, which needs to be improved. Utility Model Content

[0006] In order to improve the connection reliability of the wiring terminal after installation, the present application provides a wiring terminal with high connection reliability.

[0007] The present application provides a high connection reliability terminal block adopts the following technical solution:

[0008] A wiring terminal with high connection reliability comprises a shell, wherein the shell comprises a first fixing group and a second fixing group, wherein the first fixing group comprises an elastic outer foot and a fixed inner foot, and the second fixing group comprises a fixed outer foot and an elastic inner foot, wherein the fixed inner foot and the elastic inner foot are located between the elastic outer foot and the fixed outer foot, wherein the elastic outer foot and the fixed inner foot are used to clamp one end of a DIN rail, and wherein the fixed outer foot and the elastic inner foot are used to clamp the other end of the DIN rail.

[0009] By adopting the above technical solution, compared with the related art that only clamps the DIN rail with two mounting feet, one end of the DIN rail is clamped by the elastic outer foot and the fixed inner foot, and the other end of the DIN rail is clamped by the fixed outer foot and the elastic inner foot. Even if the connection between the first fixing group and the DIN rail becomes loose, the second fixing group can still ensure the connection stability between the terminal block and the DIN rail. The same applies when the second fixing group becomes loose. Such a setting effectively improves the connection reliability between the terminal block and the DIN rail.

[0010] Optionally, the elastic inner foot includes a bending portion and a resistance portion, the shell also includes a main body, one end of the bending portion is connected to the main body, and the resistance portion is connected to the other end of the bending portion, and the spacing between the bending portion and the fixed outer foot first increases and then decreases along the arrangement direction away from the main body to the elastic inner foot.

[0011] By adopting the above technical solution, the bent portion arranged in this way can effectively ensure the structural strength of the elastic inner foot while being able to achieve elastic deformation and clamp one end of the DIN rail through the abutment portion.

[0012] Optionally, the surface of the abutting portion that abuts against the DIN rail is an arc surface.

[0013] By adopting the above technical solution, by setting the surface where the abutment part contacts the DIN rail as an arc surface, even if the bending part deflects and swings to varying degrees, tight abutment between the abutment part and the DIN rail can still be ensured, thereby ensuring the tight abutment effect between the elastic inner foot and the DIN rail.

[0014] Optionally, the surface of the fixed inner foot facing the elastic outer foot is a fitting arc surface, and the fitting arc surface is a concave arc surface and is used to abut against the inner side of one end of the DIN rail.

[0015] By adopting the above technical solution, the contact surface between the fixed inner foot and the DIN rail is set to a concave arc surface to improve the fit between the fixed inner foot and the DIN rail, thereby improving the connection reliability between the fixed inner foot and the DIN rail.

[0016] Optionally, the shell includes a main body, the elastic outer foot is connected to the main body, a reinforcing rib plate is provided on a side of the elastic outer foot away from the fixed inner foot, and the reinforcing rib plate is connected to the shell.

[0017] By adopting the above technical solution, the reinforcing rib plate limits the deformation range of the elastic outer foot, and at the same time supports the side of the elastic outer foot away from the fixed inner foot, which can effectively improve the structural strength of the elastic outer foot and avoid large deformation of the elastic outer foot as much as possible.

[0018] Optionally, two opposite side walls of the shell are hand-held surfaces, and anti-slip grooves are provided on the hand-held surfaces.

[0019] By adopting the above technical solution, compared with the concave design of the two back walls of the shell for hand-holding, setting them as hand-holding planes can improve the structural strength of the shell, and the setting of the protective groove tries to avoid relative sliding of the shell when holding.

[0020] Optionally, a grounding plate is further included, a grounding cavity is provided on the surface of the shell, a clamping block is arranged on the grounding plate, a clamping groove is provided on the cavity wall of the grounding cavity, and the clamping block is clamped and matched with the clamping groove.

[0021] By adopting the above technical solution, when installing the grounding plate, the grounding plate is inserted into the grounding cavity, and the clamping block on the grounding plate is clamped into the clamping slot and engaged with the clamping slot, thereby preventing the grounding plate from falling out of the grounding cavity. Such a setting is easy to install and easy to operate.

[0022] Optionally, it also includes a grounding plate, a grounding cavity is provided on the surface of the shell, a fixing column is provided on the grounding plate, a fixing hole for inserting the fixing column is provided on the cavity wall of the grounding cavity, and a guiding inclined groove for inserting and sliding the fixing column is provided on the cavity wall of the grounding cavity with the fixing hole, the guiding inclined groove extends to the surface of the shell with the grounding cavity, the groove depth of the guiding inclined groove decreases along the insertion direction of the fixing column, and the groove bottom wall of the guiding inclined groove is used to contact with the fixing column

[0023] By adopting the above technical solution, when installing the grounding plate, the grounding plate is inserted into the grounding cavity after the fixing column is aligned with the guiding bevel groove. Since the groove depth of the guiding bevel groove decreases along the insertion direction of the fixing column, under the guidance of the groove bottom wall of the guiding bevel groove, the fixing column moves into the grounding cavity until the fixing column is aligned with the fixing groove. At this time, the fixing column is inserted into the fixing groove to fix the grounding plate. Compared with the fixing form of the card block and the slot, the grounding plate is fixed by the fixing column and the fixing slot, so that the grounding plate is less likely to loosen, and the connection strength between the grounding plate and the shell is improved. In order to ensure the connection strength between the grounding plate and the shell, the card block and the slot are fixed, and there are requirements for the size of the card block along the installation direction of the grounding plate, that is, there are requirements for the matching length of the card block and the slot. When the space for setting the card block on the grounding plate is small, it is difficult to set the card block with a size that meets the connection strength requirements, while the fixing column can meet the connection strength requirements with a smaller size.

[0024] Optionally, a button is also included, and an anti-dropping protrusion is arranged on the side wall of the button.

[0025] By adopting the above technical solution, compared with limiting the button installation by setting a block structure such as a stop ear on the side wall of the button, the setting of the anti-drop protrusion makes the button easier to install.

[0026] Optionally, it also includes a conductive sheet and a spring sheet, a wiring cavity is opened on the surface of the shell, and the conductive sheet is electrically connected to a wire protection wall for contacting the wire. When the wire is inserted into the wiring cavity, the conductive sheet, the spring sheet, the wire protection wall and the cavity wall of the wiring cavity form a wire cavity for inserting the wire, and the wire protection wall is located on the side of the wire cavity away from the bottom wall of the wiring cavity.

[0027] By adopting the above technical solution, the wire inserted into the wiring cavity can be further limited by the wire retaining wall. And because the wire retaining wall is electrically connected to the conductive sheet, the wire can be electrically connected to the conductive sheet even if it contacts the wire retaining wall, thus ensuring the reliability of the wire connection.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] The two ends of the DIN rail are clamped by the first fixing group and the second fixing group respectively, which effectively improves the connection reliability between the terminal block and the DIN rail compared with the related art in which the DIN rail is clamped by only two mounting feet;

[0030] The structural arrangement of the bending portion and the abutting portion in the elastic inner leg and the fitting arc surface on the fixed inner leg further improve the connection reliability between the terminal block of the present application and the DIN rail;

[0031] Even if the retaining ear is removed and the button is installed in the form of an anti-dropping protrusion, the stability of the spring deformation and swing can still be guaranteed under the action of the wire retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the background technology.

[0033] Figure 2 It is a schematic diagram of the structure of Example 1 of the present application and the DIN rail.

[0034] Figure 3 It is a structural diagram of Example 2 of the present application.

[0035] Figure 4 It is an exploded schematic diagram highlighting the ground cavity and the ground plate in Example 2 of the present application.

[0036] Figure 5 It is an exploded schematic diagram highlighting the card block and the card slot in Example 2 of the present application.

[0037] Description of reference numerals:

[0038] 1. Shell; 11. Main body; 111. Hand-held plane; 112. Anti-skid groove; 12. First fixing group; 121. Elastic outer foot; 122. Fixed inner foot; 123. Reinforced rib plate; 13. Second fixing group; 131. Fixed outer foot; 132. Elastic inner foot; 1321. Bending part; 1322. Resistance part; 133. Fitting arc surface; 14. Wiring cavity; 141. Wire cavity; 15. Wire hole; 16. Mounting hole; 17. Grounding cavity; 171. Slot; 172. Fixed hole; 173. Guide inclined groove; 18. Mounting foot; 2. Conductive sheet; 21. Wire retaining wall; 3. Spring sheet; 31. Pressing sheet part; 32. Connecting part; 33. Wire pressing part; 4. Button; 41. Anti-dropping protrusion; 5. Grounding sheet; 51. Block; 52. Fixed column; 6. DIN rail. DETAILED DESCRIPTION

[0039] The following is combined with Figure 2-5 This application is described in further detail.

[0040] An embodiment of the present application discloses a wiring terminal with high connection reliability. Example

[0041] Reference Figure 2 The wiring terminal with high connection reliability includes a housing 1, a conductive sheet 2 for connecting two wires, a spring sheet 3 for clamping the wires, and a button 4 for driving one end of the spring sheet 3 to swing and deform.

[0042] Reference Figure 2 The housing 1 includes a main body 11, a first fixing group 12 and a second fixing group 13. The first fixing group 12 includes an elastic outer leg 121 and a fixed inner leg 122, and the second fixing group 13 includes a fixed outer leg 131 and an elastic inner leg 132. The fixed inner leg 122 and the elastic inner leg 132 are located between the elastic outer leg 121 and the fixed outer leg 131. The elastic outer leg 121, the fixed inner leg 122, the elastic outer leg 121, the fixed inner leg 122 and the main body 11 are all integrally formed of plastic. The elastic outer leg 121 and the elastic inner leg 132 are elastic and can swing to a certain extent.

[0043] Reference Figure 2 The distance between the elastic outer foot 121 and the fixed outer foot 131 is smaller than the width of the DIN rail, and the distance between the elastic outer foot 121 and the fixed inner foot 122 is smaller than the width of one end of the DIN rail, so as to clamp one end of the DIN rail; the distance between the fixed outer foot 131 and the elastic inner foot 132 is smaller than the width of the other end of the DIN rail, so as to clamp the other end of the DIN rail.

[0044] Reference Figure 2A reinforcing rib plate 123 is provided on the side of the elastic outer leg 121 facing away from the fixed inner leg 122. The reinforcing rib plate 123 is connected to the connection end of the elastic outer leg 121 and the main body 11. The reinforcing rib plate 123 is integrally formed with the elastic outer leg 121 and the main body 11. The surface of the fixed inner leg 122 facing the elastic outer leg 121 is a fitting arc surface 133, which is a concave arc surface and is used to contact the inner side of one end of the DIN rail.

[0045] Reference Figure 2 The elastic inner foot 132 includes a bending portion 1321 and a contact portion 1322. The bending portion 1321 is "L"-shaped. The distance between the bending portion 1321 and the fixed outer foot 131 increases first and then decreases along the arrangement direction from the main body 11 to the elastic inner foot 132. One end of the bending portion 1321 is connected to the main body 11, and the contact portion 1322 is connected to the other end of the bending portion 1321. The bending portion 1321, the contact portion 1322 and the main body 11 are integrally formed. The surface of the contact portion 1322 used to contact the DIN rail is an arc surface to ensure that the contact portion 1322 fits and contacts the DIN rail.

[0046] Reference Figure 2 Two opposite side walls of the main body 11 are hand-held planes 111, and a plurality of anti-skid grooves 112 are provided on the two hand-held planes 111. The anti-skid grooves 112 are concave arc grooves, and the anti-skid grooves 112 on the same hand-held plane 111 are arranged at intervals, so that a wave-shaped hand-held portion is formed on the hand-held plane 111, which is helpful for the staff to hold.

[0047] Reference Figure 2 A wiring cavity 14 is provided on the surface of the main body 11, and the conductive sheet 2 is installed in the wiring cavity 14. Two groups of spring sheets 3 are provided and are both installed in the wiring cavity 14, one end of the spring sheet 3 contacts the conductive sheet 2, and the other end of the spring sheet 3 is used to clamp the wire with the conductive sheet 2. Two wire holes 15 for inserting wires are provided on the main body 11 corresponding to the spring sheet 3, and the two wire holes 15 are connected to the wiring cavity 14. The end of the wire is inserted into the wiring cavity 14 through the wire hole 15, pressed against the end of the corresponding spring sheet 3 used to clamp the wire, and the spring sheet 3 is deformed and bent. After the wire is inserted between the spring sheet 3 and the conductive sheet 2, the spring sheet 3 applies force to the wire, so that the spring sheet 3 and the conductive sheet 2 clamp the wire.

[0048] Reference Figure 2, the number of buttons 4 corresponds to the number of spring pieces 3, and each button 4 is used to drive different spring pieces 3 to move and unlock the end of the wire. The surface of the main body 11 provided with the wire hole 15 is provided with mounting holes 16 corresponding to the number of buttons 4, and each button 4 is slidably arranged in a different mounting hole 16. The mounting hole 16 is connected with the wiring cavity 14, so that the end of the button 4 can be extended into the wiring cavity 14. An anti-slip convex point 41 is integrally formed on the side wall of the button 4. When installing the button 4, the button 4 is inserted through the mounting hole 16 until the anti-slip convex point 41 is extended into the wiring cavity 14. The anti-slip convex point 41 plays a role of limiting to prevent the button 4 from slipping out of the mounting hole 16. By pressing the button 4, the end of the spring piece 3 used to clamp the wire can be driven to move in the opposite direction away from the adjacent wire, so that the end of the wire can be pulled out of the wiring cavity 14.

[0049] The implementation principle of Example 1 is as follows: when installing the terminal block of the present application, the terminal block of the present application is held by holding the flat surface 111 with both hands, and then one end of the DIN rail is clamped by the elastic outer leg 121 and the fixed inner leg 122, and the other end of the DIN rail is clamped by the fixed outer leg 131 and the elastic inner leg 132. Compared with the related art which has only two installation legs, namely the elastic outer leg 121 and the fixed inner leg 122 in the present application, the connection reliability of the terminal block of the present application after installation can be greatly improved by adding the fixed inner leg 122 and the elastic outer leg 121. Example

[0050] Reference Figure 3 , Figure 4 The difference between this embodiment and the first embodiment is that it further includes a grounding plate 5, and a grounding cavity 17 connected to the wiring cavity 14 is opened on the main body 11. The grounding cavity 17 extends to the elastic outer leg 121, the fixed inner leg 122, the elastic inner leg 132 and the fixed inner leg 122, and penetrates the elastic outer leg 121, the fixed inner leg 122, the elastic inner leg 132, the fixed inner leg 122 and the main body 11. The grounding cavity 17 is used for installing the grounding plate 5.

[0051] Reference Figure 5 Two clamping blocks 51 are integrally formed on one of the side walls of the grounding plate 5 , and a clamping slot 171 penetrating to the outside of the main body 11 is opened on the cavity wall of the grounding cavity 17 corresponding to the clamping block 51 , and the clamping blocks 51 are respectively engaged with different clamping slots 171 .

[0052] Reference Figure 4 , Figure 5A fixing column 52 is integrally formed on the surface of the grounding plate 5 facing away from the block 51, and a fixing hole 172 penetrating to the outside of the main body 11 is provided on the cavity wall of the grounding cavity 17 corresponding to the fixing column 52, and the fixing hole 172 is used for inserting the fixing column 52. A guiding inclined groove 173 is provided on the cavity wall of the grounding cavity 17 corresponding to the fixing column 52 where the fixing hole 172 is provided, wherein one guiding inclined groove 173 extends to the surface of the fixed inner foot 122 where the grounding cavity 17 is provided, and the other guiding inclined groove 173 extends to the surface of the main body 11 where the grounding cavity 17 is provided, and the guiding inclined groove 173 is used for inserting and sliding the fixing column 52. The groove depth of the guiding inclined groove 173 decreases along the insertion direction of the fixing column 52, and the groove bottom wall of the guiding inclined groove 173 is used to contact the fixing column 52.

[0053] Reference Figure 4 , wire retaining walls 21 are provided at both ends of the conductive sheet 2, and the conductive sheet 2 and the wire retaining walls 21 are integrally formed with conductive materials. When the wire is inserted into the wiring cavity 14, the spring 3 and the adjacent wire retaining walls 21, the conductive sheet 2, and the cavity of the wiring cavity 14 enclose a wire cavity 141, and the wire cavity 141 is used for inserting the wire. The wire retaining wall 21 is located on the side of the wire cavity 141 away from the bottom wall of the wiring cavity 14 to prevent the wire from moving away from the bottom wall of the wire cavity 141, and is used to resist the wire, thereby ensuring the reliability of the electrical connection between the wire and the conductive sheet 2.

[0054] The implementation principle of Example 2 is as follows: when installing the grounding sheet 5, first align the fixing column 52 with the guiding bevel groove 173, then insert the corresponding grounding sheet 5 into the grounding cavity 17, and insert the fixing column 52 into the guiding bevel groove 173. Guided by the guiding bevel groove 173, the fixing column 52 is inserted into the fixing hole 172, the clamping block 51 is engaged with the clamping groove 171, and the grounding sheet 5 is installed. Such a setting ensures that the housing 1 structure with the elastic inner foot 132 and the fixed inner foot 122 can also install the grounding sheet 5, and takes into account the simplicity of installing the grounding sheet 5, and at the same time can also improve the connection strength between the grounding sheet 5 and the housing 1.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wiring terminal with high connection reliability, comprising a housing (1), characterized in that: The housing (1) comprises a first fixing group (12) and a second fixing group (13); the first fixing group (12) comprises an elastic outer foot (121) and a fixed inner foot (122); the second fixing group (13) comprises a fixed outer foot (131) and an elastic inner foot (132); the fixed inner foot (122) and the elastic inner foot (132) are located between the elastic outer foot (121) and the fixed outer foot (131); the elastic outer foot (121) and the fixed inner foot (122) are used to clamp one end of a DIN rail; the fixed outer foot (131) and the elastic inner foot (132) are used to clamp the other end of the DIN rail.

2. A connection terminal with high connection reliability according to claim 1, characterized in that: The elastic inner foot (132) comprises a bending portion (1321) and a contact portion (1322); the shell (1) further comprises a main body (11); one end of the bending portion (1321) is connected to the main body (11); the contact portion (1322) is connected to the other end of the bending portion (1321); and the spacing between the bending portion (1321) and the fixed outer foot (131) first increases and then decreases along the arrangement direction from away from the main body (11) to the elastic inner foot (132).

3. A connection terminal with high connection reliability according to claim 2, characterized in that: The surface of the abutment portion (1322) that abuts against the DIN rail is an arc surface.

4. The connection terminal with high connection reliability according to claim 1, characterized in that: The surface of the fixed inner foot (122) facing the elastic outer foot (121) is a fitting arc surface (133), and the fitting arc surface (133) is a concave arc surface and is used to contact the inner side of one end of the DIN rail.

5. The connection terminal with high connection reliability according to claim 1, characterized in that: The shell (1) comprises a main body (11), the elastic outer leg (121) is connected to the main body (11), a reinforcing rib plate (123) is provided on a side of the elastic outer leg (121) away from the fixed inner leg (122), and the reinforcing rib plate (123) is connected to the shell (1).

6. A connection terminal with high connection reliability according to claim 1, characterized in that: Two opposite side walls of the housing (1) are hand-held planes (111), and anti-slip grooves (112) are provided on the hand-held planes (111).

7. The connection terminal with high connection reliability according to claim 1, characterized in that: It also comprises a grounding plate (5), a grounding cavity (17) is provided on the surface of the shell (1), a clamping block (51) is provided on the grounding plate (5), a clamping groove (171) is provided on the cavity wall of the grounding cavity (17), and the clamping block (51) is clamped and matched with the clamping groove (171).

8. The connection terminal with high connection reliability according to claim 1, characterized in that: The invention also comprises a grounding plate (5), a grounding cavity (17) is provided on the surface of the shell (1), a fixing column (52) is arranged on the grounding plate (5), a fixing hole (172) for inserting the fixing column (52) is provided on the cavity wall of the grounding cavity (17), a guiding inclined groove (173) for inserting and sliding the fixing column (52) is provided on the cavity wall of the grounding cavity (17) provided with the fixing hole (172), the guiding inclined groove (173) extends to the surface of the shell (1) provided with the grounding cavity (17), the groove depth of the guiding inclined groove (173) decreases along the insertion direction of the fixing column (52), and the groove bottom wall of the guiding inclined groove (173) is used to contact the fixing column (52).

9. The connection terminal with high connection reliability according to claim 1, characterized in that: It also comprises a button (4), wherein a side wall of the button (4) is provided with an anti-dropping protrusion (41).

10. The connection terminal with high connection reliability according to claim 1, characterized in that: The invention also comprises a conductive sheet (2) and a spring sheet (3); a wiring cavity (14) is provided on the surface of the housing (1); a wire protection retaining wall (21) for contacting the wire is electrically connected to the conductive sheet (2); when the wire is inserted into the wiring cavity (14), the conductive sheet (2), the spring sheet (3), the wire protection retaining wall (21) and the cavity wall of the wiring cavity (14) enclose a wire cavity (141) for inserting the wire; the wire protection retaining wall (21) is located on a side of the wire cavity (141) away from the bottom wall of the wiring cavity (14).

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