Wiring terminal, wiring terminal unit and wiring terminal assembly method

Abstract

The present invention relates to a wiring terminal, a wiring terminal unit and an assembly method of the wiring terminal. The wiring terminal comprises a screw, a pressing plate, a conductive guide piece, an elastic limiting piece, a conductive spring piece, a nut and a wiring seat; the screw comprises a nail cap and a nail rod; the nail rod comprises a first rod, a second rod and a third rod; the second rod is provided with an external thread; the pressing plate and the guide piece are respectively provided with a first through hole and a second through hole; the nut is provided with an internal thread; the wiring seat is provided with a first limiting groove; the first limiting groove is provided with a first accommodating groove; the first limiting groove is provided with a third through hole; the wiring seat is provided with a second limiting groove; after assembly, the screw, the pressing plate, the guide piece and the nut are all restricted on the wiring seat and are not easy to disperse during transportation; since the wiring terminal provided by the present invention does not need to screw the nut on the screw when leaving the factory, it is not necessary to loosen the nut during wiring, so not only the wiring efficiency is high, but also damage caused by the screw being twisted will not occur.

Description

Technical Field

[0001] The present invention relates to the technical field of wiring terminals, and more specifically, to a wiring terminal, a wiring terminal unit and an assembling method of the wiring terminal. Background Art

[0002] Fire alarm system terminals such as smoke detectors and fire alarms are usually connected to fire alarm controllers through wires for communication. They generally include a base and a terminal body. The base is provided with wiring terminals for fixing the wires. Existing wiring terminals generally include screws, pressing plates, conductive springs, and nuts that match the screws. When wiring, place the wire between the pressing plate and the conductive spring, and then tighten the nut to reduce the distance between the pressing plate and the conductive spring until the wire is clamped. To prevent the wiring terminals from falling apart during transportation, the nuts are generally screwed onto the screws when leaving the factory. At this time, the distance between the pressing plate and the conductive spring is often not enough for the wire to enter between the two. In actual applications, the following two situations often occur:

[0003] 1. The nut is not tightened enough, causing the terminal block to spread apart during transportation;

[0004] 2. The nut is tightened too much, which makes it difficult to loosen the nut during the wiring process, affecting the wiring efficiency. Sometimes the screw may even be twisted, causing damage to the terminal. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a wiring terminal, a wiring terminal unit and an assembly method of the wiring terminal in view of the above-mentioned defects of the prior art.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] On the one hand, a terminal block is provided, which includes a screw, a pressure plate, a conductive contact piece, an elastic limiting piece, a conductive spring piece, a nut and a terminal block; the screw includes a nail cap and a nail rod; the nail rod includes a first rod, a second rod and a third rod that are fixedly connected in sequence; one end of the first rod away from the second rod is fixedly connected to the nail cap; the side of the second rod is provided with an external thread; the diameters of the first rod and the third rod are both smaller than the outer diameter of the external thread; the pressure plate and the contact piece are respectively provided with a first through hole and a second through hole; one end of the limiting piece is fixedly connected to the contact piece, and the other end is arranged in the second through hole; The nut is provided with an internal thread that cooperates with the external thread; a first limiting groove that cooperates with the guide plate is provided on one side surface of the terminal block; a first receiving groove that cooperates with the pressure plate is provided on the inner top surface of the first limiting groove; the first receiving groove is connected to the upper surface of the terminal block; one end of the conductive spring sheet is arranged outside the first receiving groove, and the other end is fixedly connected to the guide plate; a third through hole that cooperates with the second rod is provided on the inner bottom surface of the first limiting groove; a second limiting groove that cooperates with the nut is provided on one side surface of the terminal block; the inner top surface of the second limiting groove is connected to the third through hole.

[0008] The wiring terminal described in the present invention, wherein, a third limiting groove cooperating with the pressure plate is formed on the side surface of the end of the first rod away from the second rod; the third limiting groove is connected to the end surface of the first rod away from the second rod; the pressure plate is arranged in the third limiting groove; the diameter of the first through hole is smaller than the diameter of the second rod and is not smaller than the diameter of the first rod where the third limiting groove is formed.

[0009] In the wiring terminal described in the present invention, there are multiple limit plates, and the multiple limit plates are distributed along the circumference of the second via hole.

[0010] The wiring terminal of the present invention, wherein the cross-sectional shape of the second via hole is circular or polygonal.

[0011] The wiring terminal described in the present invention, wherein the first accommodating groove is communicated with a side surface of the wiring seat.

[0012] The wiring terminal described in the present invention, wherein the inner bottom surface of the second limiting groove is provided with a second accommodating groove matched with the third rod.

[0013] In the wiring terminal of the present invention, one end of the conductive spring away from the connecting piece is disposed outside the first receiving groove through a notch of the first receiving groove.

[0014] The wiring terminal of the present invention, wherein the inner side surface of the first accommodating groove is provided with a fourth through hole for the conductive spring to pass through.

[0015] On the other hand, a terminal unit is provided, based on the aforementioned terminal, which comprises a plurality of the terminal blocks arranged linearly; a plurality of the terminal blocks are fixedly connected in sequence; the orientations of the notches of the first limiting grooves of the plurality of terminal blocks are consistent; the orientations of the notches of the second limiting grooves of the plurality of terminal blocks are consistent.

[0016] On the other hand, a method for assembling a terminal block is provided, based on the aforementioned terminal block, wherein the method for assembling a terminal block comprises the following steps:

[0017] Step 1: Sleeve the pressing plate onto the nail rod of the screw;

[0018] Step 2: placing the guide piece and the nut into the first limiting groove and the second limiting groove respectively;

[0019] Step three: Pass the shank of the screw through the second through hole and the third through hole until the third shank enters the nut. At this time, one end of the limiting piece disposed in the second through hole presses the external thread.

[0020] The beneficial effects of the present invention are as follows: after assembly, the screws, the pressure plate, the guide plate and the nut are all restricted on the terminal block, so the terminal block provided by the present invention is not easy to be scattered during transportation; when assembling the terminal block provided by the present invention, there is no need to screw the nut on the screw, thereby improving the assembly efficiency. At the same time, since the terminal block provided by the present invention does not need to screw the nut on the screw when leaving the factory, there is no need to loosen the nut during wiring, so not only the wiring efficiency is high, but also damage caused by the screw being twisted will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0022] Figure 1 is a schematic structural diagram of a wiring terminal according to a first embodiment of the present invention;

[0023] Figure 2 is a cross-sectional view of a terminal block according to a first embodiment of the present invention (the section line is not shown);

[0024] Figure 3 It is a structural schematic diagram of a wiring seat of a wiring terminal according to the first embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of assembling the first conductive spring piece and the first conductive contact piece of the connection terminal of the first embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of assembling the second conductive spring piece and the second conductive contact piece of the connection terminal of the first embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of assembling the second conductive spring piece and the third conductive contact piece of the connection terminal of the first embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of a wiring terminal according to a second embodiment of the present invention;

[0029] Figure 8 is a cross-sectional view of a connection terminal according to a second embodiment of the present invention (the section line is not shown);

[0030] Fig. 9 is a schematic structural diagram of a wiring seat of a wiring terminal according to a second embodiment of the present invention;

[0031] Fig.10 It is a schematic structural diagram of a conductive spring piece and a conductive contact piece of a connection terminal according to a second embodiment of the present invention;

[0032] Fig.11 It is a schematic diagram of the structure of the wiring terminal unit of the third embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0034] Embodiment 1

[0035] The structural diagram of the wiring terminal of the first embodiment of the present invention is as follows Figure 1 See also Figures 2 to 6; It includes a screw 1, a pressure plate 2, a conductive contact piece 3, an elastic limiting piece 4, a conductive spring piece 5, a nut 6 and a terminal block 7; the screw 1 includes a nail cap 8 and a nail rod 9; the nail rod 9 includes a first rod 10, a second rod 11 and a third rod 12 that are fixedly connected in sequence; the end of the first rod 10 away from the second rod 11 is fixedly connected to the nail cap 8; the side of the second rod 11 is provided with an external thread (not shown in the figure); the diameters of the first rod 10 and the third rod 12 are both smaller than the outer diameter of the external thread; the pressure plate 2 and the contact piece 3 are respectively provided with a first through hole (not shown in the figure) and a second through hole 14; one end of the limiting piece 4 is fixedly connected to the contact piece 3, and the other end is arranged in the second through hole 14 ; The nut 6 is provided with an internal thread (not shown in the figure) that cooperates with the external thread; a first limiting groove 15 that cooperates with the conductive plate 3 is provided on one side surface of the terminal block 7; a first accommodating groove 16 that cooperates with the pressure plate 2 is provided on the inner top surface of the first limiting groove 15; the first accommodating groove 16 is communicated with the upper surface of the terminal block 7; one end of the conductive spring 5 is arranged outside the first accommodating groove 16, and the other end is fixedly connected to the conductive plate 3; a third through hole 17 that cooperates with the second rod 11 is provided on the inner bottom surface of the first limiting groove 15; a second limiting groove 18 that cooperates with the nut 6 is provided on one side surface of the terminal block 7; the inner top surface of the second limiting groove 18 is communicated with the third through hole 17.

[0036] When assembling the wiring terminal provided by the present invention, the operating steps are as follows:

[0037] Step 1: Sleeve the pressing plate 2 onto the nail rod 9 of the screw 1;

[0038] It should be noted that if the screw 1 and the pressure plate 2 are integrated, step one does not need to be performed. For example, the screw 1 is a screw 1 with a gasket, that is, the screw 1 comes with a pressure plate 2 (gasket). At this time, when the operator takes the screw 1, the pressure plate 2 has already been put on the nail rod 9 of the screw 1, and there is no need to perform step one. However, if the screw 1 and the pressure plate 2 are separate, step one needs to be performed.

[0039] Step 2: Place the guide piece 3 and the nut 6 into the first limiting groove 15 and the second limiting groove 18 respectively;

[0040] It should be noted that when the guide piece 3 is placed in the first limiting groove 15, except for being able to move toward the notch of the first limiting groove 15, movement in other directions is restricted by the first limiting groove 15; when the nut 6 is placed in the second limiting groove 18, except for being able to move toward the notch of the second limiting groove 18, movement in other directions is restricted by the second limiting groove 18, and the nut 6 cannot rotate under the action of the second limiting groove 18.

[0041] Step 3: Pass the shank 9 of the screw 1 through the second through hole 14 and the third through hole 17 until the third rod 12 enters the nut 6. At this time, one end of the limiting piece 4 disposed in the second through hole 14 presses the external thread.

[0042] It should be noted that in the process of the third rod 12 entering the nut 6, since the limiting plate 4 is elastic, it will be pushed open by the nail rod 9 first, and the nail rod 9 can smoothly pass through the second through hole 14 and the third through hole 17. When the external thread reaches the bottom of the limiting plate 4, that is, the third rod 12 enters the nut 6, the limiting plate 4 will be reset under the action of its own elasticity, pressing the external thread, so that the screw 1 cannot escape from the second through hole 14 and the third through hole 17; since the nail rod 9 passes through the second through hole 14, the guide plate 3 cannot move toward the notch of the first limiting groove 15 under the action of the nail rod 9, so the guide plate 3 is fixed; since the third rod 12 enters the nut 6, the nut 6 cannot move toward the notch of the second limiting groove 18 under the action of the third rod 12, so the nut 6 is fixed.

[0043] When wiring the terminal provided by the present invention, the wire is placed between the pressure plate 2 and the guide piece 3, and then the screw 1 is turned. During this process, the wire is clamped by the pressure plate 2 and the guide piece 3, and the nut 6 is screwed on the screw 1, and the wiring is completed.

[0044] When using the wiring terminal provided by the present invention, after the terminal body is installed on the base, the conductive spring piece 5 will contact the conductive contact part on the terminal body, thereby realizing the electrical connection between the terminal body and the wiring terminal. Since the wiring terminal is electrically connected to the wire connected to the fire alarm controller, the fire alarm system terminal is now electrically connected to the fire alarm controller.

[0045] As can be seen from the foregoing, after assembly, the screw 1, the pressure plate 2, the guide plate 3 and the nut 6 are all restricted on the terminal block 7, so the terminal block provided by the present invention is not easy to disperse during transportation; when assembling the terminal block provided by the present invention, there is no need to screw the nut 6 on the screw 1, thereby improving the assembly efficiency. At the same time, since the terminal block provided by the present invention does not need to screw the nut 6 on the screw 1 when leaving the factory, there is no need to loosen the nut 6 when wiring, so not only the wiring efficiency is high, but also there will be no damage caused by the screw 1 being twisted.

[0046] It should be noted that:

[0047] First, the limiting piece 4 is preferably in an inclined state, with one end of the limiting piece 4 disposed in the second through hole 14 being lower than the other end. This arrangement facilitates the nail rod 9 to pass through the second through hole 14;

[0048] Second, the limiting piece 4 can be formed by flanging the edge of the second through hole 14, which is easy to process;

[0049] 3. The conductive spring sheet 5 can be provided with one or two. When two are provided, they are preferably located on the same side of the conductive contact sheet 3;

[0050] Fourth, the guide piece 3 and the first limiting groove 15 as well as the nut 6 and the second limiting groove 18 are preferably clearance-fitted, so as to facilitate inserting the guide piece 3 into the first limiting groove 15 and inserting the nut 6 into the second limiting groove 18 .

[0051] Preferably, a third limiting groove (not shown in the figure) cooperating with the pressing plate 2 is formed on the side surface of the end of the first rod 10 away from the second rod 11; the third limiting groove is connected to the end surface of the end of the first rod 10 away from the second rod 11; the pressing plate 2 is arranged in the third limiting groove; the diameter of the first through hole is smaller than the diameter of the second rod 11 and is not smaller than the diameter of the first rod 10 where the third limiting groove is formed; since the third limiting groove is provided at the end of the first rod 10 away from the second rod 11, and the end of the first rod 10 away from the second rod 11 is fixedly connected to the nail cap 8, the pressing plate 2 is restricted to a position close to the nail cap 8. This arrangement makes the distance between the pressing plate 2 and the guide plate 3 before wiring larger, and the wire can be inserted between the pressing plate 2 and the guide plate 3 without adjusting the distance between the pressing plate 2 and the guide plate 3, thereby improving the wiring efficiency.

[0052] Further preferably, the width of the third limiting groove is greater than the thickness of the pressure plate 2, that is, the third limiting groove and the pressure plate 2 are clearance-fitted. This arrangement makes the spacing between the pressure plate 2 and the guide plate 3 adjustable, so that it can adapt to wires of different diameters and has stronger adaptability.

[0053] It should be noted that: since the diameter of the first through hole is smaller than the diameter of the second rod 11 and not smaller than the diameter of the third limiting groove of the first rod 10, and the clamping plate is clamped in the third limiting groove, the pressing plate 2 needs to be mounted on the first rod 10 during the process of making the screw 1, that is, the screw 1 is a screw 1 with a gasket. At this time, the screw 1 and the pressing plate 2 are integrated, so when the operator takes the screw 1, the pressing plate 2 has been mounted on the nail rod 9 of the screw 1, and there is no need to perform step one during assembly, which simplifies the assembly steps and improves processing efficiency.

[0054] Preferably, a plurality of limiting plates 4 are provided, and the plurality of limiting plates 4 are distributed circumferentially along the second through hole 14 ; the limiting effect on the screw 1 is good.

[0055] Preferably, the cross-sectional shape of the second via hole 14 is circular or polygonal.

[0056] Preferably, the first receiving groove 16 is communicated with the side of the wiring seat 7, so that the wire can be inserted between the pressing plate 2 and the connecting piece 3 to facilitate wiring.

[0057] Preferably, the inner bottom surface of the second limiting groove 18 is provided with a second accommodating groove 19 that cooperates with the third rod 12; the setting of the second accommodating groove 19 provides an accommodating space for the third rod 12, and when the screw 1 is screwed, the third rod 12 can enter the second accommodating groove 19, so that the screwing part of the external thread on the second rod 11 and the internal thread of the nut 6 is increased, and the reliability is high.

[0058] Preferably, one end of the conductive spring sheet 5 away from the conductive contact sheet 3 is disposed outside the first receiving groove 16 through the notch of the first receiving groove 16 , so as to facilitate the conductive spring sheet 5 to contact with the conductive contact part on the terminal body.

[0059] Embodiment 2

[0060] like Figures 7 to 10 As shown, the second embodiment of the present invention is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that:

[0061] The inner side of the first accommodating groove 16 is provided with a fourth through hole 20 for the conductive spring 5 to pass through; the conductive spring 5 passes through the side of the wiring seat 7 through the fourth through hole 20, which is suitable for the situation when the conductive contact part on the terminal body is arranged on the side of the wiring seat 7.

[0062] Embodiment 3

[0063] like Fig.11 As shown, the third embodiment of the present invention provides a terminal unit, which is based on the aforementioned terminal, and includes a plurality of terminal blocks arranged in a linear manner; a plurality of terminal blocks 7 are fixedly connected in sequence; the orientations of the notches of the first limiting grooves 15 of the plurality of terminal blocks 7 are consistent; the orientations of the notches of the second limiting grooves 18 of the plurality of terminal blocks 7 are consistent; when a fire alarm system terminal and a fire alarm controller need to be electrically connected using multiple wires for communication, this terminal unit can be arranged on the base of the fire alarm system terminal to meet the needs; the orientations of the notches of the plurality of first limiting grooves 15 are consistent, the orientations of the notches of the plurality of second limiting grooves 18 are also consistent, and the wiring is neat.

[0064] Preferably, two adjacent first accommodating grooves 16 are separated by the body portion of the wiring seat 7, which can prevent adjacent wiring terminals from being cross-wired during wiring and causing poor contact or short circuit.

[0065] Embodiment 4

[0066] Embodiment 4 of the present invention provides an assembly method of a wiring terminal, based on the aforementioned wiring terminal, comprising the following steps:

[0067] Step 1: Put the pressure plate onto the screw rod;

[0068] Step 2: Place the guide piece and the nut into the first limiting groove and the second limiting groove respectively;

[0069] Step 3: Pass the screw rod through the second through hole and the third through hole until the third rod enters the nut. At this time, one end of the limit plate disposed in the second through hole presses the external thread.

[0070] When the wiring terminal provided by the present invention is assembled by utilizing the assembly method provided by the present invention, it is not necessary to screw the nut onto the screw, and the screw can be inserted into the second through hole and the third through hole, thereby achieving high assembly efficiency.

[0071] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A terminal block, characterized in that: The invention comprises a screw, a pressing plate, a conductive contact piece, an elastic limiting piece, a conductive spring piece, a nut and a terminal block; the screw comprises a nail cap and a nail rod; the nail rod comprises a first rod, a second rod and a third rod which are fixedly connected in sequence; one end of the first rod away from the second rod is fixedly connected to the nail cap; the side surface of the second rod is provided with an external thread; the diameters of the first rod and the third rod are both smaller than the outer diameter of the external thread; the pressing plate and the contact piece are respectively provided with a first through hole and a second through hole; one end of the limiting piece is fixedly connected to the contact piece, and the other end is provided in the second through hole; the nut is provided with a through hole which is connected to the An internal thread that cooperates with an external thread; a first limiting groove that cooperates with the guide plate is provided on one side surface of the terminal block; a first accommodating groove that cooperates with the pressure plate is provided on the inner top surface of the first limiting groove; the first accommodating groove is connected to the upper surface of the terminal block; one end of the conductive spring is arranged outside the first accommodating groove, and the other end is fixedly connected to the guide plate; a third through hole that cooperates with the second rod is provided on the inner bottom surface of the first limiting groove; a second limiting groove that cooperates with the nut is provided on one side surface of the terminal block; the inner top surface of the second limiting groove is connected to the third through hole.

2. The connection terminal according to claim 1, characterized in that: A third limiting groove cooperating with the pressure plate is formed on the side surface of one end of the first rod away from the second rod; the third limiting groove is connected to the end surface of the first rod away from the second rod; the pressure plate is arranged in the third limiting groove; the diameter of the first through hole is smaller than the diameter of the second rod and not smaller than the diameter of the first rod where the third limiting groove is formed.

3. The connection terminal according to claim 1, characterized in that: There are multiple limiting plates, and the multiple limiting plates are distributed along the circumference of the second via hole.

4. The connection terminal according to claim 1, characterized in that: The cross-sectional shape of the second via hole is circular or polygonal.

5. The connection terminal according to claim 1, characterized in that: The first accommodating groove is communicated with a side surface of the wiring seat.

6. The connection terminal according to claim 1, characterized in that: The inner bottom surface of the second limiting groove is provided with a second accommodating groove matched with the third rod.

7. The connection terminal according to claim 1, characterized in that: One end of the conductive spring away from the conductive contact piece is disposed outside the first accommodating groove through a notch of the first accommodating groove.

8. The connection terminal according to claim 1, characterized in that: A fourth through hole for the conductive spring to pass through is formed on the inner side surface of the first accommodating groove.

9. A terminal unit, based on the terminal according to any one of claims 1 to 8, characterized in that: It comprises a plurality of the wiring terminals arranged in a linear manner; a plurality of the wiring seats are fixedly connected in sequence; the orientations of the notches of the first limiting grooves of the plurality of wiring seats are consistent; the orientations of the notches of the second limiting grooves of the plurality of wiring seats are consistent.

10. A method for assembling a terminal block, based on the terminal block according to any one of claims 1 to 8, characterized in that: The assembly method comprises the following steps: Step 1: Sleeve the pressing plate onto the nail rod of the screw; Step 2: placing the guide piece and the nut into the first limiting groove and the second limiting groove respectively; Step three: Pass the shank of the screw through the second through hole and the third through hole until the third shank enters the nut. At this time, one end of the limiting piece disposed in the second through hole presses the external thread.

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