Connector

Abstract

The invention belongs to the technical field of cable connection, and discloses a connector. The connector comprises a wire inserting pipe, a wedge-shaped wire pressing piece, an elastic piece and a pressure sensor. Self-locking and stable connection are achieved after a wire is inserted through cooperation of the wedge-shaped wire pressing piece and the wire inserting hole in the wire inserting pipe, the pressure sensor is arranged in the wire passing cavity, the pressure of the radial direction of the wire and the peripheral wall of the wire passing cavity is detected, namely the pressing force borne by the wire, and therefore the pressing state of the wire in the connector can be known by the outside world and can be adjusted in time, and the working efficiency is improved. The problem of potential safety hazards caused by loose contact between the radial direction of the wire and the circumferential wall of the wire passing cavity is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cable connection, and in particular to a connector. Background Art

[0002] The bare wire of the cable is usually a twisted wire composed of multiple strands of copper or aluminum wires. When the bare wire is inserted into the cable connector, the bare wire at the insertion end must be able to be inserted into the connector plug hole, and the hole diameter of the plug hole must be larger than the bare wire diameter. On the other hand, the bare wire after insertion must meet the contact area with the surrounding wall of the conductive medium in the connector. The size of the contact area between the bare wire and the surrounding wall of the conductive medium in the connector affects the current flow area. A small flow area will cause a large resistance when the current passes through the bare (conducting) wire, and the resistance will be converted into heat, which will cause the wire head to heat up and may even cause a fire.

[0003] In the process of connecting the wire and the connector, the existing crimp-free terminal blocks usually cannot obtain the internal information of the connector. It is unknown whether the peripheral wall of the wire is tightly connected to the peripheral wall of the conductive medium of the connector after the wire is inserted into the connector. Therefore, if the peripheral wall of the bare wire is not in close contact with the contact area of ​​the conductive medium in the connector, after power is turned on, the overcurrent area is small and the wire heats up greatly, which will pose a safety hazard. Summary of the invention

[0004] The object of the present invention is to provide a connector which can ensure a stable connection between a wire and a peripheral wall of a conductive medium and can know the compression force borne by the wire.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A connector, comprising: a wire insertion tube, comprising a first plug-in tube and a second plug-in tube, wherein the first plug-in tube and the second plug-in tube are respectively provided with a plug-in section, the plug-in section of the first plug-in tube and the plug-in section of the second plug-in tube are plugged in axially, and the first plug-in tube and the second plug-in tube are both provided with a wire insertion hole extending along the axis thereof, and the diameter of the wire insertion hole gradually decreases in a direction away from the plug-in section; a wedge-shaped wire pressing piece can be movably arranged in the wire insertion hole, the wedge-shaped wire pressing piece is provided with a wire passing cavity along the axial direction thereof, and the wedge-shaped wire pressing piece is provided with a wire passing cavity One end of the wire piece away from the plug-in section includes a wedge-shaped portion that can shrink or expand relative to the axis of the wire passing cavity, and the wedge-shaped portion can shrink under the pressure of the wall of the wire insertion hole to lock the wire; an elastic member is arranged between the wedge-shaped wire pressing member of the first plug-in tube and the wedge-shaped wire pressing member of the second plug-in tube; a pressure sensor is arranged on the cavity wall of the wire passing cavity and is flush with the cavity wall surface, and is used to detect the pressing force exerted on the wire; wherein the first plug-in tube, the second plug-in tube and the wedge-shaped wire pressing member are all made of conductive material.

[0007] Preferably, the wedge-shaped wire pressing piece is provided with a groove on the cavity wall of the wire passing cavity, and the pressure sensor is arranged in the groove; a first through hole is opened in the groove along the radial direction of the wire passing cavity for leading out the lead of the pressure sensor.

[0008] Preferably, a wire groove is provided on the outer peripheral wall of the wedge-shaped wire pressing member, and after the lead wire passes through the groove, it is led out from the end surface of the wedge-shaped wire pressing member through the wire groove.

[0009] Preferably, it further includes a wire take-up tube, which is coaxially arranged in the plug-in section and located at one end of the wire insertion hole; a cavity is arranged on the tube wall of the wire take-up tube, a bearing is coaxially arranged in the cavity, and a clockwork spring is fixedly arranged on the outer ring of the bearing; the lead wire is wound around the clockwork spring, and both ends of the lead wire respectively pass through the tube wall of the wire take-up tube along the axial direction.

[0010] Preferably, two of the clockwork springs are provided, and the two clockwork springs are sleeved on the bearing at an interval.

[0011] Preferably, the elastic force of the clockwork spring is smaller than the locking force of the wedge-shaped wire pressing member on the wire.

[0012] Preferably, the pressure sensors are arranged at intervals along the circumferential direction of the cavity wall of the wire cavity.

[0013] Preferably, the pressure sensor comprises a resistive strain sensor.

[0014] Preferably, a wire hole is provided in the fixing member, and the wire hole communicates with the inside and outside of the wire insertion tube.

[0015] Preferably, it further comprises an electric control board and a power supply coil, the pressure sensor is electrically connected to the electric control board, and the power supply coil is used to supply power to the electric control board.

[0016] Beneficial effects of the present invention:

[0017] The invention discloses a connector, which includes a wire insertion tube, a wedge-shaped wire pressing piece, an elastic piece, a fixing piece and a pressure sensor. The wire insertion tube includes a first plug-in tube and a second plug-in tube, the first plug-in tube and the second plug-in tube are respectively provided with a plug-in section, the plug-in section of the first plug-in tube and the plug-in section of the second plug-in tube are plugged in along the axial direction, and the first plug-in tube and the second plug-in tube are both provided with a wire insertion hole extending along the axis thereof, and the diameter of the wire insertion hole gradually decreases in the direction away from the plug-in section; the wedge-shaped wire pressing piece can be movably arranged in the wire insertion hole, and the wedge-shaped wire pressing piece is provided with a wire passing cavity along the axial direction thereof, and one end of the wedge-shaped wire pressing piece away from the plug-in section includes a wedge-shaped portion that can be shrunk or opened relative to the axis of the wire passing cavity, and the wedge-shaped portion can be shrunk under the pressure of the wall of the wire insertion hole to lock the wire; the elastic piece is arranged between the wedge-shaped wire pressing piece of the first plug-in tube and the wedge-shaped wire pressing piece of the second plug-in tube; the pressure sensor is arranged on the cavity wall of the wire passing cavity and is flush with the cavity wall surface, and is used to detect the pressing force borne by the wire. The present invention realizes self-locking and stable connection after the wire is inserted by cooperating with the wedge-shaped wire pressing piece and the wire insertion hole. A pressure sensor is arranged in the wire passing cavity to detect the radial pressure of the wire and the peripheral wall of the wire passing cavity, that is, the clamping force borne by the wire, so that the outside world can know the clamping state of the wire in the connector and can make timely adjustments to avoid the problem of loose contact between the radial direction of the wire and the peripheral wall of the wire passing cavity, which poses a safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic diagram of the assembly structure of a connector provided by an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the axial cross-sectional structure of a connector provided by an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of the central take-up device;

[0021] Figure 4 yes Figure 3 Schematic diagram of the mainspring structure;

[0022] Figure 5 yes Figure 2 Schematic diagram of the connection relationship between the positioning pin and the lead.

[0023] In the figure:

[0024] 1. first plug-in tube; 11. wire insertion hole; 12. wedge-shaped wire pressing piece; 121. wire passage cavity; 122. groove; 123. first through hole; 124. wire groove; 14. first step portion;

[0025] 2. second plug-in tube; 241. second step portion; 242. third step portion;

[0026] 3. Positioning hole;

[0027] 31. fixing member; 32. second through hole; 311. shielding layer; 312. second insulating layer;

[0028] 4. Elastic parts;

[0029] 5. wire; 51. first insulating layer;

[0030] 6. Take-up tube; 61. Spring;

[0031] 13. Resistance strain gauge; 131. Lead wire;

[0032] 621, outer ring of the bearing; 622, inner ring of the bearing;

[0033] 631, first end surface; 631', third through hole;

[0034] 632, second end surface; 632', fourth through hole;

[0035] 70, insulating sleeve; 71, first insulating connecting sleeve; 711, fifth through hole; 72, second insulating connecting sleeve; 73, folding plate;

[0036] 80. Electric control board; 81. Power coil. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] The present invention discloses a connector, such as Figure 1 to Figure 2 As shown, the connector includes a plug-in tube, a wedge-shaped wire pressing member 12, an elastic member 4, a fixing member 31 and a pressure sensor. The plug-in tube includes a first plug-in tube 1 and a second plug-in tube 2, and the first plug-in tube 1 and the second plug-in tube 2 are respectively provided with plug-in sections, and the plug-in sections of the first plug-in tube 1 and the second plug-in tube 2 are plugged in along the axial direction. Specifically, the plug-in sections of the first plug-in tube 1 and the second plug-in tube 2 have an overlapping portion after being plugged in, that is, the outer diameter of the plug-in section of either the first plug-in tube 1 or the second plug-in tube 2 is less than or equal to the inner diameter of the other plug-in section.

[0042] In some embodiments, a positioning hole 3 is provided at the overlapping position of the plug-in sections of the first plug-in tube 1 and the second plug-in tube 2, and a fixing member 31 passes through the positioning hole 3 of the plug-in sections of the two to fix the relative position of the first plug-in tube 1 and the second plug-in tube 2, wherein the fixing member 31 can be set as a positioning pin.

[0043] In some specific embodiments, Figure 2As shown, a first step portion 14 is provided on the inner wall of the plug-in section of the first plug-in tube 1, a second step portion 241 is provided on the inner wall of the plug-in section of the second plug-in tube 2, and a third step portion 242 is provided on the outer wall of the plug-in section of the second plug-in tube 2. It can be understood that the end of the plug-in section of the first plug-in tube 1 abuts against the third step portion 242 of the second plug-in tube 2, and the end of the plug-in section of the second plug-in tube 2 abuts against the first step portion 14 of the inner wall of the first plug-in tube 1. The first step portion 14 of the first plug-in tube 1 also abuts against the axial end face of the internal wire take-up tube 6 to limit the position, and the second step portion 241 of the second plug-in tube 2 abuts against the axial end face of the internal wire take-up tube 6 to limit the position.

[0044] The first plug-in tube 1 and the second plug-in tube 2 are both provided with a wire insertion hole 11 extending along their axis, and the diameter of the wire insertion hole 11 gradually decreases in the direction away from the plug-in section; the wedge-shaped wire pressing piece 12 is movably arranged in the wire insertion hole 11, and the wedge-shaped wire pressing piece 12 is provided with a wire passing cavity 121 along its axial direction, and the end of the wedge-shaped wire pressing piece 12 away from the plug-in section includes a wedge-shaped portion that can be condensed or opened relative to the axis of the wire passing cavity 121, and the wedge-shaped portion can be condensed under the pressure of the hole wall of the wire insertion hole 11 to lock the wire 5; the elastic member 4 is arranged between the wedge-shaped wire pressing piece 12 of the first plug-in tube 1 and the wedge-shaped wire pressing piece 12 of the second plug-in tube 2; the fixing member 31 is arranged in the plug-in section and passes through the elastic member 4 along the radial direction of the plug-in section to fix the relative positions of the first plug-in tube 1, the second plug-in tube 2 and the elastic member 4; the pressure sensor is arranged on the cavity wall of the wire passing cavity 121 and is flush with the cavity wall surface, and is used to detect the pressing force borne by the wire 5. Among them, the first plug-in tube 1 and the second plug-in tube 2 and the wedge-shaped wire crimping piece 12 are all made of conductive materials. Therefore, after the first plug-in tube 1 and the second plug-in tube 2 are plugged and assembled, an insulating sleeve 70 is also provided on the periphery of the two. It can be understood that the present invention realizes self-locking and stable connection of the wire 5 after insertion through the cooperation of the wedge-shaped wire crimping piece 12 and the wire insertion hole 11, and a pressure sensor is provided in the wire passage cavity 121 to detect the radial pressure of the wire 5 and the peripheral wall of the wire passage cavity 121, that is, the clamping force borne by the wire 5, so that the outside world can know the clamping state of the wire 5 in the connector, and can make timely adjustments to avoid the problem of loose contact between the radial direction of the wire 5 and the peripheral wall of the wire passage cavity 121, which poses a safety hazard.

[0045] Specifically, the internal structure of the first plug-in tube 1 except the plug-in section is the same as the internal structure of the second plug-in tube 2 except the plug-in section, and the internal structure of the first plug-in tube 1 is taken as an example for description below.

[0046] like Figure 2As shown, the inner wall of the wire insertion hole 11 in the first plug-in tube 1 is truncated cone-shaped, and the end of the wire insertion hole 11 into which the wire 5 is inserted is a reduced diameter end, that is, the diameter of the wire insertion hole 11 gradually decreases in the direction away from the plug-in section, or the diameter of the wire insertion hole 11 gradually decreases in the direction from the plug-in section to one end of the wire 5 plug of the wire insertion hole 11. A wedge-shaped wire pressing piece 12 adapted to the truncated cone-shaped wire insertion hole 11 of the first plug-in tube 1 is provided in the plug-in tube, and the wedge-shaped wire pressing piece 12 is conductive. It can be understood that the wires 5 at both ends of the connector are electrically connected via the wedge-shaped wire pressing piece 12 of the first plug-in tube 1, the first plug-in tube 1, the plug-in section of the first plug-in tube 1 and the plug-in section of the second plug-in tube 2, the second plug-in tube 2 and the wedge-shaped wire pressing piece 12 of the second plug-in tube 2.

[0047] The wedge-shaped portion of the wedge-shaped wire pressing member 12 is composed of a plurality of pressing pieces with a trapezoidal cross section enclosed around the axial direction of the first plug-in tube 1, and the enclosed wedge-shaped portion is a truncated cone, and a wire-passing cavity 121 for the wire 5 is formed inside the enclosed truncated cone, and the truncated cone is coaxially arranged with the wire-passing cavity 121. The plurality of pressing pieces of the wedge-shaped portion can be condensed toward the axis of the wire-passing cavity 121 under the pressure of the hole wall of the wire insertion hole 11, so as to realize the compression and locking of the wire 5.

[0048] An elastic member 4 is provided between the wedge-shaped wire pressing member 12 of the first plug-in tube 1 and the wedge-shaped wire pressing member 12 of the second plug-in tube 2. The elastic member 4 can be provided as a compression spring. Optionally, a fixing member 31 is provided to radially pass through the gap of the compression spring to fix the compression spring, so as to facilitate the synchronous reset of the wedge-shaped wire pressing members 12 at both ends of the elastic member 4. When the wire 5 passes through the wire passage cavity 121 of the wedge-shaped wire pressing member 12, the compression spring is compressed. It can be understood that the wire 5 is wrapped with a first insulating layer 51, and the end of the wire 5 is exposed for connection. When in use, when the end of the wire 5 is inserted into the wire hole, it is necessary to first overcome the elastic force of the elastic member 4 to move the wire cavity 121 toward one end of the fixing member 31 to open the wire 5 socket of the wire cavity 121, and then the wire 5 is inserted to the bottom and abuts against the positioning pin, and the end of the wire 5 stops inserting, and driven by the compression spring reset movement, the wedge-shaped wire pressing piece 12 of the first plug-in tube 1 and the wedge-shaped wire pressing piece 12 of the second plug-in tube 2 and the wire 5 move in opposite directions. At this time, the compression spring reset movement drives the pressing piece of the wedge-shaped wire pressing piece 12 to squeeze the exposed end of the wire 5 to achieve self-locking, so that the wire 5 is in close contact with the wedge-shaped wire pressing piece 12.

[0049] In some embodiments, the pressure sensor is disposed on the cavity wall of the wire-passing cavity 121 and is flush with the cavity wall surface, and is used to detect the clamping force on the wire 5. Optionally, the pressure sensor is disposed near one end of the positioning pin. In some specific embodiments, the wedge-shaped wire pressing member 12 is provided with a groove 122 on the cavity wall of the wire-passing cavity 121, and the pressure sensor is disposed in the groove 122; a through hole is provided in the groove 122 along the radial direction of the wire-passing cavity 121, and is used to lead out the lead 131 of the pressure sensor. It can be understood that the pressure sensor is electrically connected to the control unit via the lead 131. By providing the groove 122, the wire 5 can smoothly pass through the wire-passing cavity 121 without being affected by the pressure sensor.

[0050] In some embodiments, the outer wall of the wedge-shaped wire crimping member 12 is provided with a wire groove 124, and the lead wire 131 passes through the groove 122 and is led out from the end face of the wedge-shaped wire crimping member 12 through the wire groove 124. The lead wire 131 is hidden in the wire groove 124 provided on the outer surface of the wedge-shaped wire crimping member 12, and is led out from the end face of the wedge-shaped wire crimping member 12 close to one end of the positioning pin. It is understandable that the provision of the wire groove 124 to accommodate the hidden lead wire 131 can avoid the friction of the relative movement between the wedge-shaped wire crimping member 12 and the inner wall of the wire insertion tube (wire insertion hole 11), which may cause the lead wire 131 to damage the exposed internal conductive wire, thereby causing damage to the sensor or control unit.

[0051] In some embodiments, pressure sensors are arranged at circumferential intervals along the wall of the wire-passing cavity 121. It is understandable that the pressure sensors are arranged circumferentially along the wall of the wire-passing cavity 121, so that the compression force of various circumferential parts of the wire 5 can be uniformly detected. The pressure sensors arranged at circumferential intervals are regarded as a group. The pressure sensors can also be arranged in multiple groups. The multiple groups of pressure sensors are also arranged at axial intervals along the wire-passing cavity 121 to detect the compression force of different axial positions of the wire 5, so that the detection result is more accurate. In some specific embodiments, the pressure sensor includes a resistance strain sensor, and the resistance strain sensor includes a resistance strain gauge 13; wherein the resistance strain gauge 13 is arranged at circumferential intervals along the wall of the wire-passing cavity 121. It is understandable that the resistance strain gauge 13 is insulated to ensure that after the pressure measurement is completed, the wire 5 is energized and the pressure sensor will not be burned. It can be understood that the resistance strain gauge 13 is subjected to the radial expansion pressure generated by the wire 5 on the inner peripheral wall of the wire passage cavity 121 of the wedge-shaped wire pressing member 12, and the mechanical strain generated causes the resistance value of the metal strain gauge inside to change accordingly. By measuring the change in the resistance value of the metal strain gauge, it is possible to determine the tightness of the contact between the exposed wire 5 and the peripheral wall of the wedge-shaped wire pressing member 12. It is also possible to set up multiple sets of resistance strain gauges 13 to more comprehensively measure the pressure conditions of different parts of the wire 5, so that the detection result is more accurate.

[0052] In some embodiments, the connector of the present invention further comprises a wire take-up tube 6, which is coaxially arranged in the plug-in section and located at one end of the wire insertion hole 11; the wire take-up tube 6 is an insulating member, and the inner diameter of the wire take-up tube 6 is larger than the outer diameter of the compression spring and the wedge-shaped wire pressing member 12. The tube wall of the wire take-up tube 6 is a cavity, and a bearing is coaxially arranged in the cavity of the tube wall of the wire take-up tube 6, and a spring spring 61 is coaxially arranged on the outer ring 621 of the bearing; a lead wire 131 is wound around the spring spring 61, and the two ends of the lead wire 131 respectively pass through the tube wall of the wire take-up tube 6 in the axial direction.

[0053] In some embodiments, two spring springs 61 are provided, and the two spring springs 61 are spaced apart and sleeved on the bearing. It is understandable that since one end of the spring spring 61 rotates with the bearing, it is easy to cause the lead 131 to twist and bend, and the cavity space of the tube wall of the take-up tube 6 is small, it is easy to get stuck and damage the lead 131, therefore, two spring springs 61 are provided, and both ends of the lead 131 can be stretched or retracted at the same time.

[0054] Specifically, Figures 2 to 4 As shown, two spiral springs 61 are coaxially arranged on the outer ring 621 of the bearing, and the same lead wire 131 is adhered and wound on the two springs 61, and the lead wire 131 is wound in a rotational manner following the shape of the springs 61. One end of the springs 61 is fixed to the outer ring 621 of the bearing as a fixed end, and the other end is spirally wound on the outer ring 621 of the bearing as a tension end. The lead wire 131 led out of the tension end of one spring 61 passes through the third through hole 631' provided on the first end face 631 in the axial direction of the take-up tube 6, and the lead wire 131 led out of the tension end of the other spring 61 passes through the fourth through hole 632' provided on the second end face 632 in the axial direction of the take-up tube 6. The lead wire 131 between the two springs 61 is connected from the fixed end, so that the lead wires 131 at both ends of the take-up tube 6 can be pulled out and retracted, and the lead wire 131 between the two springs 61 can rotate with the bearing, so that the lead wire 131 as a whole is not easy to twist and deform. It can be understood that the arrangement of the take-up tube 6 makes it possible for the wedge-shaped wire pressing member 12 of the first plug-in tube 1 or the wedge-shaped wire pressing member 12 of the second plug-in tube 2 to move in the plug-in hole 11 without being affected, or in other words, the lead wire 131 of the pressure sensor will not be torn off.

[0055] In some embodiments, the elastic force of the clockwork spring 61 is smaller than the locking force of the wedge-shaped wire pressing member 12 on the wire 5 , so that the lead wire 131 can be easily pulled out without affecting the locking of the wedge-shaped wire pressing member 12 on the wire 5 .

[0056] When in use, the inner ring 622 of the bearing is fixed on the inner tube wall of the wire take-up tube 6. As the wedge-shaped wire pressing piece 12 moves along the axial direction toward the wire 5 insertion port of the wire insertion hole 11, the wire 5 on the clockwork spring 61 is pulled, so that the clockwork spring 61 rotates relative to the inner ring along with the outer ring 621 of the bearing, and the lead 131 of the released pressure sensor is stretched. The elastic force of the clockwork spring 61 is less than the locking force of the wedge-shaped wire pressing part on the wire 5; as the wedge-shaped wire pressing part moves along its axial direction toward the direction of the positioning pin, the clockwork spring 61 rotates and recovers the lead 131 of the pressure sensor under the action of its own contraction force.

[0057] In some embodiments, a wire hole is provided in the fixing member 31, and the wire hole communicates with the inside and outside of the wire insertion tube. Figures 2 to 3 As shown, the lead wire 131 led out from the stretched end of one clockwork spring 61 passes through the third through hole 631' provided on the first end face 631 in the axial direction of the wire take-up tube 6, then passes through the wire hole of the fixing member 31, and passes through the wire hole to insert the wire tube, and the lead wire 131 led out from the stretched end of the other clockwork spring 61 passes through the fourth through hole 632' provided on the second end face 632 in the axial direction of the wire take-up tube 6. In other words, after the lead wire 131 of the pressure sensor passes through the wire groove 124, it passes into the wire take-up tube 6 from the fourth through hole 632' provided on the second end face 632 in the axial direction of the wire take-up tube 6, then is wound around the two clockwork springs 61, and passes through the third through hole 631' provided on the first end face 631 in the axial direction of the wire take-up tube 6, then passes through the wire hole of the fixing member 31, and passes through the wire hole to insert the wire tube. In some specific embodiments, such as Figure 5 As shown, the positioning pin is in a hollow tube shape, the hollow interior is used as a wire hole, the inner tube wall is provided with a shielding layer 311 and a second insulating layer 312, and a second through hole 32 is opened on the tube wall to connect the wire hole with the inside of the wire insertion tube.

[0058] In some embodiments, the first insulating connection sleeve 71 and the second insulating connection sleeve 72 are disposed at both ends of the insulating sleeve 70. The first insulating connection sleeve 71 is provided with a folding plate 73 extending toward its own central axis on the circumference of the open end to contact the wire 5 so that the wire 5 is not easy to loosen.

[0059] In some embodiments, the connector of the present invention further includes an electric control board 80 and a power supply coil 81, wherein the pressure sensor is electrically connected to the electric control board 80, and the power supply coil 81 is used to supply power to the electric control board 80. In some specific embodiments, such as Figure 2As shown, in the cavity outside the wire passing position between the opening of the first insulating connection sleeve 71 and the wire plug hole 11, an electric control board 80 and a power taking coil 81 electrically connected to the electric control board 80 are arranged near the plug hole. The wire passing position and the electric control board 80 and the power taking coil 81 can be separated and fixed by an insulating retaining wall (not shown in the figure). A protective circuit and a shielding cover or shielding layer 311 are provided on the electric control board 80. The shielding cover or shielding layer 311 is made of soft magnetic alloy material to ensure that the electric control board 80 can operate stably for a long time.

[0060] In some embodiments, a first through hole 123 is provided at a position corresponding to the end of the positioning pin on the insulating sleeve 70 to lead out the lead 131 of the pressure sensor, and a fifth through hole 711 is provided on the first insulating connection sleeve 71 to introduce the lead 131 and connect it to the electric control board 80. This can ensure that the volume occupied by the lead 131 or part of the lead 131 in the connector is small. In order to fix the lead 131 introduced into the first insulating connection sleeve 71 from the positioning pin, a third insulating connection sleeve can be provided outside the insulating sleeve 70, and the lead 131 is clamped between the insulating sleeve 70 and the third insulating connection sleeve. The lead 131 can also be buried in the sleeve wall of the insulating sleeve 70 and the sleeve wall of the first insulating connection sleeve 71 during production. One end of the buried wire can be extended into the positioning pin wire hole to connect the lead 131 of the pressure sensor through a plug connector, and the other end can be led out from the sleeve wall of the first insulating connection sleeve 71 to connect the electric control board 80.

[0061] In some specific embodiments, a single-chip microcomputer, a power module and a wireless module are arranged on the electric control board 80. The power coil 81 uses the principle of electromagnetic induction to inductively draw power through the primary current flowing through the bare wire 5 and the connector. The change of the current on and off generates a magnetic field, and the power coil 81 draws power through the electromagnetic field generated by the current of the bare wire 5 in the first insulating connecting sleeve 71. The current induced in the power coil 81 charges the power module to provide the normal operation of the single-chip microcomputer and the wireless module inside the electric control board 80. The pressure sensor is connected to the single-chip microcomputer through the lead 131, and the detected resistance change is converted into an electrical signal. The single-chip microcomputer sends the resistance change electrical signal to the wireless module, and the collected resistance change data is transmitted to the mobile phone, handheld detection device or main control background in real time through wireless. When installing or repairing the terminal, when the wire 5 is inserted into the connector, it can be displayed through the mobile phone software or the handheld detection device to show whether the alarm wire 5 is in close contact with the surrounding wall of the wedge-shaped wire pressing part in the connector.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A connector, characterized in that: include: A wire insertion tube, comprising a first plug-in tube (1) and a second plug-in tube (2), wherein the first plug-in tube (1) and the second plug-in tube (2) are respectively provided with a plug-in section, the plug-in section of the first plug-in tube (1) and the plug-in section of the second plug-in tube (2) are plugged in along the axial direction, and the first plug-in tube (1) and the second plug-in tube (2) are both provided with a wire insertion hole (11) extending along the axis thereof, and the diameter of the wire insertion hole (11) gradually decreases in a direction away from the plug-in section; A wedge-shaped wire pressing piece (12) is movably arranged in the wire insertion hole (11), and a wire passing cavity (121) is arranged along the axial direction of the wedge-shaped wire pressing piece (12). The end of the wedge-shaped wire pressing piece (12) away from the plug-in section includes a wedge-shaped portion that can be shrunk or opened relative to the axis of the wire passing cavity (121), and the wedge-shaped portion can be shrunk under the pressure of the hole wall of the wire insertion hole (11) to lock the wire (5); An elastic member (4) is arranged between the wedge-shaped wire pressing member (12) of the first plug-in tube (1) and the wedge-shaped wire pressing member (12) of the second plug-in tube (2); A pressure sensor, arranged on the cavity wall of the wire-passing cavity (121) and flush with the cavity wall surface, and used for detecting the pressing force borne by the wire (5); Wherein, the first plug-in tube (1), the second plug-in tube (2) and the wedge-shaped wire pressing member (12) are all made of conductive material.

2. The connector according to claim 1, characterized in that: The wedge-shaped wire pressing member (12) is provided with a groove (122) on the cavity wall of the wire passing cavity (121), and the pressure sensor is arranged in the groove (122); A first through hole (123) is provided in the groove (122) along the radial direction of the wire passage cavity (121) and is used to lead out a lead wire (131) of the pressure sensor.

3. The connector according to claim 2, characterized in that: The outer peripheral wall of the wedge-shaped wire pressing piece (12) is provided with a wire groove (124), and the lead wire (131) passes through the groove (122) and then is led out from the end surface of the wedge-shaped wire pressing piece (12) through the wire groove (124).

4. The connector according to claim 2, characterized in that: It also includes a wire collection tube (6), which is coaxially arranged in the plug-in section and located at one end of the wire insertion hole (11); The tube wall of the wire take-up tube (6) is provided with a cavity, a bearing is coaxially arranged in the cavity, and a spring (61) is fixedly arranged on the outer ring (621) of the bearing; The lead wire (131) is wound around the spring spring (61), and two ends of the lead wire (131) respectively pass through the tube wall of the wire take-up tube (6) along the axial direction.

5. The connector according to claim 4, characterized in that: Two of the spring springs (61) are provided, and the two spring springs (61) are sleeved on the bearing at intervals.

6. The connector according to claim 4, characterized in that: The elastic force of the clockwork spring (61) is smaller than the locking force of the wedge-shaped wire pressing member (12) on the wire (5).

7. The connector according to claim 1, characterized in that: The pressure sensors are arranged at intervals along the circumferential direction of the cavity wall of the wire-passing cavity (121).

8. The connector according to claim 7, characterized in that: The pressure sensor includes a resistive strain sensor.

9. The connector according to claim 1, characterized in that: It also includes a fixing member (31) which is inserted into the plug-in section and passes through the elastic member (4) in the radial direction of the plug-in section. A wire hole is provided in the fixing member (31), and the wire hole communicates with the inside and outside of the wire insertion tube.

10. The connector according to any one of claims 1 to 9, characterized in that: It also includes an electric control board (80) and a power supply coil (81), wherein the pressure sensor is electrically connected to the electric control board (80), and the power supply coil (81) is used to supply power to the electric control board (80).

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