A plug-in terminal

Abstract

The present application relates to the field of wiring terminals, and specifically discloses a plug-in wiring terminal, which includes a housing, a wiring cavity is provided on the surface of the housing, a conductive sheet and a spring are installed in the wiring cavity, a wire hole connected to the wiring cavity is provided on the housing, the wire hole is used for inserting the wire, a guide is provided in the wiring cavity, when the wire is inserted into the wiring cavity, the guide, the spring, the conductive sheet and the bottom wall of the wiring cavity enclose a wire cavity for inserting the wire, and an observation port is provided on the guide, the observation port penetrates the guide and connects the wire cavity with the surface of the guide facing away from the wire cavity. The present application has the effect of improving the convenience for the staff to judge whether the wiring terminal and the wire are tightly connected.

Description

Technical Field

[0001] The present application relates to the field of wiring terminals, and in particular to a plug-in wiring terminal. Background Art

[0002] Direct plug-in terminal blocks are a common electronic connection component that can be used for wire wiring. Rigid wires or flexible wires with ferrules can be directly inserted into the terminals without the aid of tools.

[0003] In related technologies, such as Figure 1 The wiring terminal and DIN rail shown include a housing and a DIN rail 8 . The housing 1 includes two mounting feet 19 . The DIN rail 8 is clamped by the two mounting feet 19 so that the wiring terminal is mounted on the DIN rail 8 .

[0004] A wiring cavity 14 is provided on the surface of the housing 1, and a conductive sheet 2 and a spring sheet 3 are arranged in the wiring cavity 14. A wire hole is also provided on the housing 1, and the end of the wire is inserted into the wiring cavity 14 through the wire hole 15, and pressed against one end of the spring sheet 3 to deform the spring sheet 3 until the end of the wire is inserted between the spring sheet 3 and the conductive sheet 2 and fully installed in place, at which time the spring sheet 3 and the conductive sheet 2 clamp the wire. A guide 6 is provided in the wiring cavity 14, and when the wire is inserted into the wiring cavity 14, the guide 6, the spring sheet 3, the conductive sheet 2 and the bottom wall of the wiring cavity 14 enclose a wire cavity 141 for inserting the wire, and the guide 6 is located on the side of the wire cavity 141 away from the bottom wall of the wiring cavity 14 to guide the installation of the wire and the deformation and swing of the spring sheet.

[0005] Although the setting of the guide part helps to install the wire into the wiring cavity, it also blocks the wire, making it difficult for the staff to judge whether the wire, the spring sheet and the conductive sheet are tightly connected. Summary of the invention

[0006] In order to improve the convenience for workers to judge whether the terminal block and the wire are tightly connected, the present application provides a direct plug-in terminal block.

[0007] The present application provides a plug-in terminal block adopting the following technical solution:

[0008] A plug-in terminal comprises a shell, a surface of the shell is provided with a wiring cavity, a conductive sheet and a spring are installed in the wiring cavity, the shell is also provided with a wire hole connected to the wiring cavity, the wire hole is used for inserting the wire, a guide is provided in the wiring cavity, when the wire is inserted into the wiring cavity, the guide, the spring, the conductive sheet and the bottom wall of the wiring cavity enclose a wire cavity for inserting the wire, the guide is provided with an observation port, the observation port passes through the guide and connects the wire cavity with the surface of the guide facing away from the wire cavity.

[0009] By adopting the above technical solution, when installing the wire, the wire is inserted into the wiring cavity through the wire hole, and the wire is pressed against the spring sheet and one end of the spring sheet is deformed to be inserted between the spring sheet and the conductive sheet, and tightly pressed against the spring sheet and the conductive sheet. The guide piece guides the wire to be inserted into the wiring cavity, and avoids deflection of the wire when it is inserted as much as possible. The setting of the observation port enables the staff to directly observe whether the wire, spring sheet and conductive sheet are tightly connected, which improves the convenience for the staff to judge whether the wire is installed in place.

[0010] Optionally, a mounting hole connected to the wiring cavity is provided on the shell, a button for interfering with the spring is provided in the mounting hole, the shell includes a support wall separating the mounting hole and the wire hole, the guide member includes a lower extension portion, and the lower extension portion is connected to a side of the support wall away from the mounting hole.

[0011] By adopting the above technical solution, when the button is pressed to deform the spring sheet, the spring sheet will exert a lateral force on the button, that is, a force along the direction from the mounting hole to the wire hole. By adding a lower extension, when an observation port is opened to ensure the convenience of observation by the staff, the support effect of the support wall can be strengthened, that is, the structural strength of the support wall can be strengthened, and the service life of the shell can be extended.

[0012] Optionally, the guide member includes a guide portion and an upper extension portion arranged on a side of the guide portion close to the wire hole, the surface of the guide portion close to the wire hole is used to enclose an observation port, the conductive sheet includes a wire-contacting portion for contacting the wire, the upper extension portion is located at one end of the guide portion close to the wire-contacting portion, the wire-contacting portion is also used to contact with an end of a spring sheet, the end of the spring sheet used to contact the wire-contacting portion is a wire-pressing portion, the wire-pressing portion is arranged at an angle, the spacing between the wire-pressing portion and the wire hole decreases in a direction away from the wire-contacting portion, and when the wire-pressing portion contacts the wire-contacting portion, the upper extension portion is located on the side of the wire-pressing portion close to the wire hole.

[0013] By adopting the above technical solution, when installing the wire, the wire is pressed against the spring-pressing wire part, and the wire pressing part is driven to move in the direction away from the wire hole until the wire is installed. When the wire is pulled out, the spring piece recovers, and the wire pressing part moves in the direction close to the emergence part until the wire pressing part contacts the wire contacting part. At this time, the upper extension part is still located on the side of the wire pressing part close to the wire hole, which effectively limits the wire pressing part from moving out through the observation port, and effectively ensures the stability and reliability of the swing deformation of the spring piece.

[0014] When the wire is not pressed against the wire pressing part to deform the wire pressing part, the end of the wire pressing part closest to the wire contact part is the side of the wire pressing part farthest from the wire hole. By arranging the upper extension part at one end of the guide part close to the wire contact part, the size of the upper extension part can be minimized when the wire pressing part is blocked from escaping through the observation port, that is, the spatial impact of the upper extension part on the observation port can be minimized, thereby maximizing the observation space of the observation port for easy observation by the staff.

[0015] Optionally, the shell 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 the DIN rail, and the fixed outer foot and the elastic inner foot are used to clamp the other end of the DIN rail.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Optionally, the surface of the abutting portion that abuts against the DIN rail is an arc surface.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Optionally, the guide member includes a guide portion and a limiting portion connected to the guide portion, a clearance groove is provided on the surface of the guide portion facing the limiting portion, a groove wall of the clearance groove and the limiting portion enclose a sheet loading channel for inserting one end of the spring sheet, and the sheet loading channel is connected to the wiring cavity;

[0026] One of the groove walls of the give way groove is a first inclined surface, the first inclined surface is connected with the surface of the guide part facing the limiting part, the surface of the limiting part facing the guide part is a second inclined surface, the distance between the first inclined surface and the second inclined surface is the width of the loading channel, a deformable block is arranged on the first inclined surface, the surface of the block facing away from the wiring cavity is the loading inclined surface, the distance between the loading inclined surface and the wiring cavity increases along the arrangement direction from the second inclined surface to the first inclined surface, and the surface of the block facing the wiring cavity is connected with the plane of the guide part facing the wiring cavity.

[0027] By adopting the above technical solution, when installing the spring sheet, first press both sides of the spring sheet to compress it, then install one side of the spring sheet into the wiring channel through the sheet loading channel, and then remove the force applied to the spring sheet, the spring sheet is restored and staggered with the sheet loading channel. In this way, even if the guide part and the limit part are provided, the spring sheet can still be installed smoothly.

[0028] Due to the limited space in the wiring cavity, after the guide part is provided with a clearance groove, after the wire is inserted into the guide wire cavity, the end of the spring sheet in contact with the wire will move to align with the loading channel. After repeatedly plugging and unplugging the wire, it is easy to cause the spring sheet to move itself, so that the end of the spring sheet in contact with the wire enters the loading channel. At this time, after the wire is pulled out, the spring sheet will conflict with the first inclined surface when it recovers, causing the spring sheet to be unable to deform.

[0029] A stopper is added, and the loading inclined surface not only guides the installation of the spring sheet, but also helps the stopper to deform until the stopper is deformed to a distance between itself and the second inclined surface that is sufficient for the spring sheet to be loaded, so that the spring sheet passes over the stopper and is completely loaded into the wiring cavity.

[0030] During the process of pulling out the wire, the block blocks the spring sheet to limit the end of the spring sheet in the sheet loading channel, and the surface of the block facing the wiring cavity is connected with the plane of the guide part facing the wiring cavity. On the one hand, it will not affect the deformation of the spring sheet, and on the other hand, the spring sheet can be moved back to the side of the guide part close to the wiring cavity when it recovers.

[0031] In summary, the addition of the block not only affects the installation of the spring piece, but also guides the installation of the spring piece, and can block and limit the spring piece, thereby avoiding the jamming of the spring piece as much as possible and reducing the failure rate of the terminal.

[0032] Optionally, when one end of the spring sheet abuts against the limiting portion, the end of the spring sheet abutting against the limiting portion is aligned with the film loading channel, the surface of the block facing the wiring cavity is a film taking slope, and the distance between the film taking slope and the wiring cavity decreases along the arrangement direction from the second slope to the first slope.

[0033] When taking out the spring sheet, one end of the spring sheet is deformed to contact the limit part when the spring sheet is pressed, and the pressed end of the spring sheet is aligned with the loading channel. Then the spring sheet is taken out through the loading channel, and the spring sheet is pressed against the taking-out inclined surface and deforms the block until the spring sheet passes over the block.

[0034] When one end of the spring sheet moves into the sheet loading channel during the process of pulling out the wire, the spring sheet recovers and applies force to the sheet taking inclined surface. Under the guidance of the sheet taking inclined surface, the spring sheet moves back to the side of the guide part close to the wiring cavity.

[0035] Such a configuration, on the one hand, does not affect the removal of the spring sheet, and has a guiding effect on the removal of the spring sheet. On the other hand, without affecting the compression deformation and recovery of the spring sheet, the spring sheet is further prevented from getting stuck, thereby reducing the failure rate of the terminal.

[0036] In summary, the present application includes at least one of the following beneficial technical effects:

[0037] Through the observation port, it is possible to directly observe whether the wire, spring and conductive sheet are tightly connected, which improves the convenience of judgment for the staff;

[0038] The lower extension part supports the supporting wall, and ensures that the shell strength can meet the lateral force applied by the button under the condition of satisfying observation; the upper extension part can not only block and limit the pressing part, but also maximize the observation space of the observation port;

[0039] The stopper can effectively eliminate the jamming of the spring piece due to the conflict with the first inclined surface, and can not affect the installation and removal of the spring piece, and can guide the installation and removal of the spring piece, that is, the failure rate of the terminal is reduced while the convenience of installing and removing the spring piece is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the background technology.

[0041] Figure 2 It is a structural diagram of Example 1 of the present application.

[0042] Figure 3 yes Figure 2A magnified schematic diagram of center A.

[0043] Figure 4 It is a structural diagram of Example 2 of the present application.

[0044] Figure 5 It is an exploded schematic diagram highlighting the ground cavity and the ground plate in Example 2 of the present application.

[0045] Figure 6 It is an exploded schematic diagram highlighting the card block and the card slot in Example 2 of the present application.

[0046] Figure 7 A schematic diagram of the structure of Example 3 of the present application when equipped with wires.

[0047] Figure 8 yes Figure 7 A magnified schematic diagram of point B in the middle.

[0048] Description of reference numerals:

[0049] 1. Shell; 11. Main body; 111. Hand-held plane; 112. Anti-skid groove; 113. Support wall; 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. Rejection part; 133. Fitting arc surface; 14. Wiring cavity; 141. Wire cavity; 15. Wire hole; 16. Mounting hole; 17. Grounding cavity; 171. Slot; 172. Fixing hole; 173. Guide inclined groove; 18. Mounting Column; 19, mounting foot; 2, conductive sheet; 21, wire contact part; 22, conduction part; 3, spring piece; 31, pressing sheet part; 32, connecting part; 33, pressing line part; 4, button; 41, anti-dropping protrusion; 5, grounding sheet; 51, block; 52, fixing column; 6, guide piece; 61, limiting part; 611, second inclined plane; 62, guide part; 621, clearance groove; 622, first inclined plane; 63, lower extension part; 64, upper extension part; 65, film loading channel; 66, observation port; 7, stopper; 71, film loading inclined plane; 72, film removal inclined plane; 8, DIN rail. DETAILED DESCRIPTION

[0050] The following is combined with Figure 2-8 This application is described in further detail.

[0051] The embodiment of the present application discloses a plug-in terminal. Embodiment 1:

[0052] Reference Figure 2 The plug-in terminal comprises 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.

[0053] 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.

[0054] 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.

[0055] Reference Figure 2 A 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.

[0056] 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.

[0057] 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.

[0058] Reference Figure 2When installing the terminal block of the present application, hold the flat surface 111 with both hands to hold the terminal block of the present application, then clamp one end of the DIN rail with the elastic outer foot 121 and the fixed inner foot 122, and clamp the other end of the DIN rail with the fixed outer foot 131 and the elastic inner foot 132.

[0059] 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. The conductive sheet 2 includes two wire contacting portions 21 and a conducting portion 22 connecting the two wire contacting portions 21. The two wire contacting portions 21 are respectively arranged at both ends of the conducting portion 22 and are respectively used to contact different wires. The wire contacting portions 21 and the conducting portion 22 are integrally formed with conductive materials.

[0060] Reference Figure 2 , Figure 3 There are two groups of spring pieces 3 and both are installed in the wiring cavity 14. Two mounting posts 18 are provided in the wiring cavity 14 corresponding to the spring pieces 3. The mounting posts 18 are integrally formed with the main body 11. The spring pieces 3 are sleeved on the mounting posts 18, and the spring pieces 3 themselves are symmetrically arranged, half of which is used to contact the conductive part 22, and the other half is used to contact the adjacent wire contact part 21. The half of the spring piece 3 used to contact the wire contact part 21 is also used to contact the adjacent wire.

[0061] Reference Figure 2 , Figure 3 The half of the spring sheet 3 that contacts the conductive portion 22 is the pressing sheet portion 31, and the other half of the spring sheet 3 is the connecting portion 32 connected to the pressing sheet portion 31 and the wire pressing portion 33 connected to the connecting portion 32. The pressing sheet portion 31, the connecting portion 32 and the wire pressing portion 33 are integrally formed of conductive materials. The wire pressing portion 33 is one end of the spring sheet 3 close to the adjacent wire contact portion 21, and the wire pressing portion 33 is used to contact the adjacent wire contact portion 21, and the wire pressing portion 33 is also used to contact the adjacent wire.

[0062] Reference Figure 2 , Figure 3 The main body 11 has two wire holes 15 for inserting wires corresponding to the spring sheet 3, and both wire holes 15 are connected to the wiring cavity 14. The wire pressing portion 33 and the connecting portion 32 are both inclined, and the spacing between the wire pressing portion 33 and the wire hole 15 decreases in the direction away from the wire contact portion 21. The end of the wire is inserted into the wiring cavity 14 through the wire hole 15, pressed against the corresponding wire pressing portion 33, and the spring sheet 3 is deformed and bent. After the wire is inserted between the wire pressing portion 33 and the wire contact portion 21, the wire pressing portion 33 applies force to the wire, so that the wire pressing portion 33 and the wire contact portion 21 clamp the wire.

[0063] Reference Figure 2 , Figure 3The number of buttons 4 corresponds to the number of springs 3, and each button 4 is used to drive different springs 3 to move and unlock the ends of the wires. The surface of the main body 11 provided with the wire holes 15 is provided with mounting holes 16 corresponding to the number of buttons 4. The part of the main body 11 separating adjacent mounting holes 16 and wire holes 15 is a support wall 113, and each button 4 is slidably disposed in a different mounting hole 16. The mounting hole 16 is communicated with the wiring cavity 14, so that the end of the button 4 can extend into the wiring cavity 14.

[0064] Reference Figure 2 , Figure 3 The side wall of the button 4 is integrally formed with an anti-dropout protrusion 41. When installing the button 4, the button 4 is inserted through the mounting hole 16 until the anti-dropout protrusion 41 extends into the wiring cavity 14. The anti-dropout protrusion 41 plays a limiting role to prevent the button 4 from escaping from the mounting hole 16. By pressing the button 4, the wire pressing portion 33 can be driven to move in the opposite direction away from the adjacent wire, so that the end of the wire can be drawn out of the wiring cavity 14.

[0065] Reference Figure 2 , Figure 3 Two sets of guide members 6 are provided in the wiring cavity 14 corresponding to the wiring holes. The two sets of guide members 6 are used to guide the insertion and removal of different wires, and are also used to guide the deformation of different springs 3. When the wire is inserted into the wiring cavity 14, the guide member 6, the wire pressing portion 33, the connecting portion 32, the wire contact portion 21 and the bottom wall of the wiring cavity 14 enclose a wire cavity 141 for inserting the wire.

[0066] Reference Figure 3 The guide member 6 includes a limiting portion 61 connected to the cavity wall of the wiring cavity 14 and a guiding portion 62 connected to the limiting portion 61. The limiting portion 61, the guiding portion 62 and the main body 11 are integrally formed. The surface of the limiting portion 61 facing the guiding portion 62 is an inclined surface and is used to contact the wire pressing portion 33. A clearance groove 621 is provided on the surface of the guiding portion 62 facing the limiting portion 61. The groove wall of the clearance groove 621 and the limiting portion 61 enclose a sheet loading channel 65 for inserting the wire pressing portion 33. The sheet loading channel 65 connects the wire cavity 141 with the surface of the guide member 6 facing away from the wire cavity 141. One of the groove walls of the clearance groove 621 is a first inclined surface 622, and the first inclined surface 622 is connected to the surface of the guide portion 62 facing the limiting portion 61. The surface of the limiting portion 61 facing the guiding portion 62 is the second inclined surface 611. The distance between the first inclined surface 622 and the second inclined surface 611 is the width of the film loading channel 65. The width of the film loading channel 65 is greater than the width of the wire pressing portion 33. When the wire pressing portion 33 conflicts with the limiting portion 61, the wire pressing portion 33 is aligned with the film loading channel 65.

[0067] Reference Figure 3The guide member 6 further includes a lower extension 63 and an upper extension 64. The lower extension 63 is connected to the side of the support wall 113 away from the mounting hole 16 and is integrally formed with the support wall 113 to support the support wall 113. There is a gap between the cavity wall of the wiring cavity 14 with the opening of the wire hole 15 and the guide portion 62. The upper extension 64 is integrally formed on the side of the guide portion 62 close to the adjacent wire hole 15, and the upper extension 64 is located at one end of the guide portion 62 close to the adjacent wire contact portion 21. The cavity wall of the wiring cavity 14 with the opening of the wire hole 15, the surfaces of the guide portion 62 and the upper extension 64 close to the adjacent wire hole 15, and the surface of the lower extension 63 facing away from the adjacent wire hole 15 form an observation port 66. The observation port 66 penetrates the guide member 6 and connects the wire cavity 141 with the surface of the guide member 6 facing away from the wire cavity 141. The observation port 66 is in the shape of a fisheye and is used to observe the connection status of the wire, the wire pressing portion 33, and the wire contact portion 21. When the wire pressing portion 33 contacts the wire contacting portion 21 , the upward extending portion 64 is located at a side of the wire pressing portion 33 close to the wire hole 15 .

[0068] The implementation principle of the first embodiment is as follows: when installing the wire, the wire is directly inserted into the wire hole 15, the wire is pressed against the wire pressing part 33 and the spring 3 is deformed, until the wire moves between the wire pressing part 33 and the wire contacting part 21, and the wire pressing part 33 and the wire contacting part 21 clamp the wire. The connection between the wire, the wire pressing part 33 and the wire contacting part 21 can be observed through the observation port 66, which is convenient for the staff to judge. Embodiment 2:

[0069] Reference Figure 4 , Figure 5 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.

[0070] Reference Figure 6 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 .

[0071] Reference Figure 5 , Figure 6A 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.

[0072] 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. Embodiment 3:

[0073] Reference Figure 6 , Figure 7 The difference between this embodiment and the embodiment 1 is that a deformable stopper 7 is provided on the first inclined surface 622, and the stopper 7 and the guide portion 62 are integrally formed of plastic. The surface of the stopper 7 facing away from the wiring cavity 14 is a film loading inclined surface 71, and the surface of the stopper 7 facing the wiring cavity 14 is a film removal inclined surface 72. The spacing between the film loading inclined surface 71 and the wiring cavity 14 increases along the arrangement direction from the second inclined surface 611 to the first inclined surface 622, and the spacing between the film removal inclined surface 72 and the wiring cavity 14 decreases along the arrangement direction from the second inclined surface 611 to the first inclined surface 622, and the film removal inclined surface 72 is connected with the plane of the guide portion 62 facing the wiring cavity 14.

[0074] The implementation principle of the embodiment 3 is as follows: when installing the spring sheet 3, the spring sheet 3 is pressed to deform the spring sheet 3, the ends of the wire pressing part 33 and the connecting part 32 are inserted into the chip loading passage 65, the wire pressing part 33 is pressed against the chip loading inclined surface 71 and the stopper 7 is deformed, until the wire pressing part 33 is completely loaded into the wiring cavity 14. When removing the spring sheet 3, the spring sheet 3 is pressed to make the wire pressing part 33 contact the limiting part 61, the wire pressing part 33 is aligned with the chip loading passage 65, and then the ends of the wire pressing part 33 and the connecting part 32 are taken out through the chip loading passage 65, the wire pressing part 33 is pressed against the chip taking inclined surface 72 and the stopper 7 is deformed, until the wire pressing part 33 is completely taken out. If the spring piece 3 bounces during the wire pulling process, causing the end of the wire pressing part 33 to move into the wire pressing channel, as the wire is pulled out, the spring piece 3 recovers, the wire pressing part 33 contacts the sheet taking inclined surface 72 and re-enters the wiring cavity 14 under the guidance of the sheet taking inclined surface 72, thereby avoiding the terminal failure caused by the jamming of the spring piece 3 as much as possible.

[0075] 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 plug-in terminal, comprising a housing (1), a wiring cavity (14) being provided on the surface of the housing (1), a conductive sheet (2) and a spring sheet (3) being installed in the wiring cavity (14), a wire hole (15) being provided on the housing (1) and communicating with the wiring cavity (14), the wire hole (15) being used for inserting a wire, a guide member (6) being provided in the wiring cavity (14), when the wire is inserted into the wiring cavity (14), the guide member (6), the spring sheet (3), the conductive sheet (2) and the bottom wall of the wiring cavity (14) enclose a wire cavity (141) for inserting the wire, characterized in that: an observation port (66) is provided on the guide member (6), the observation port (66) passes through the guide member (6) and communicates with the wire cavity (141) and the surface of the guide member (6) facing away from the wire cavity (141); The housing (1) is provided with a mounting hole (16) communicating with the wiring cavity (14); a button (4) for contacting the spring sheet (3) is provided in the mounting hole (16); the housing (1) comprises a supporting wall (113) separating the mounting hole (16) and the wire hole (15); the guide member (6) comprises a lower extension (63); the lower extension (63) is connected to a side of the supporting wall (113) away from the mounting hole (16); The guide member (6) comprises a guide portion (62) and an upper extension portion (64) arranged on a side of the guide portion (62) close to the wire hole (15), the surface of the guide portion (62) close to the wire hole (15) is used to enclose an observation port (66), the conductive sheet (2) comprises a wire contact portion (21) for contacting the wire, the upper extension portion (64) is located at one end of the guide portion (62) close to the wire contact portion (21), and the wire contact portion (21) The elastic sheet (3) is also used for contacting the end of the elastic sheet (3), the end of the elastic sheet (3) used for contacting the wire contacting portion (21) is a wire pressing portion (33), the wire pressing portion (33) is arranged obliquely, and the distance between the wire pressing portion (33) and the wire hole (15) decreases in a direction away from the wire contacting portion (21). When the wire pressing portion (33) contacts the wire contacting portion (21), the upper extension portion (64) is located on a side of the wire pressing portion (33) close to the wire hole (15).

2. A plug-in terminal according to claim 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.

3. A plug-in terminal according to claim 2, 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).

4. A plug-in terminal according to claim 3, characterized in that: The surface of the abutment portion (1322) that abuts against the DIN rail is an arc surface.

5. The plug-in terminal according to claim 2, 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 abut against the inner side of one end of the DIN rail.

6. The plug-in terminal according to claim 2, 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).

7. The plug-in terminal according to claim 1, characterized in that: The guide member (6) comprises a guide portion (62) and a limiting portion (61) connected to the guide portion (62); a clearance groove (621) is provided on the surface of the guide portion (62) facing the limiting portion (61); the groove wall of the clearance groove (621) and the limiting portion (61) enclose a sheet loading channel (65) for inserting one end of the spring sheet (3); and the sheet loading channel (65) is communicated with the wiring cavity (14); One of the groove walls of the yield groove (621) is a first inclined surface (622), the first inclined surface (622) is connected with the surface of the guide part (62) facing the limiting part (61), the surface of the limiting part (61) facing the guide part (62) is a second inclined surface (611), the distance between the first inclined surface (622) and the second inclined surface (611) is the width of the chip loading channel (65), a deformable stopper (7) is arranged on the first inclined surface (622), the surface of the stopper (7) facing away from the wiring cavity (14) is the chip loading inclined surface (71), the distance between the chip loading inclined surface (71) and the wiring cavity (14) increases along the arrangement direction from the second inclined surface (611) to the first inclined surface (622), and the surface of the stopper (7) facing the wiring cavity (14) is connected with the plane of the guide part (62) facing the wiring cavity (14).

8. The plug-in terminal according to claim 7, characterized in that: When one end of the spring sheet (3) contacts the limiting portion (61), the end of the spring sheet (3) that contacts the limiting portion (61) is aligned with the sheet loading channel (65), and the surface of the stopper (7) facing the wiring cavity (14) is a sheet taking inclined surface (72), and the distance between the sheet taking inclined surface (72) and the wiring cavity (14) decreases along the arrangement direction from the second inclined surface (611) to the first inclined surface (622).

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