Spherical connection structure of flexible coil

Abstract

The utility model relates to the technical field of sensors, in particular to a spherical connecting structure of a flexible coil, which is characterized in that a first joint is sleeved at one end of the flexible coil, a second joint is sleeved at the other end of the flexible coil, a hemispherical groove is formed at the end part of the first joint, and a hemispherical bulge is formed at the end part of the second joint. After the flexible coil is sleeved on a wire to be measured, two ends of the flexible coil are connected through the first connector and the second connector, the side face of the first connector is provided with a slot, and the Hall sensor is inserted into the slot. Therefore, the measurement precision of the flexible coil is improved, and the measurement error is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field especially relates to a spherical surface connecting structure of flexible coil. BACKGROUND

[0002] Flexible coil is the device that can convert the magnetic property change of sensitive element caused by external factors such as magnetic field, current, stress and strain, temperature, light into electric signal to detect corresponding physical quantity in this way. The existing flexible coil is mostly sleeved on the measured wire, and the two ends are close to the opposite sides of hall sensor to realize measurement. However, the applicant finds that the two ends of the flexible coil are separated by the hall sensor, that is, the gap between the two ends of the flexible coil is too large, resulting in large measurement error. SUMMARY

[0003] To achieve the above object, the utility model provides a spherical surface connecting structure of flexible coil, including shell, flexible coil and hall sensor, one end of the flexible coil is sleeved with first joint, the other end is sleeved with second joint, the first joint is formed with hemispherical recess, the second joint is formed with hemispherical protrusion correspondingly, the shell is provided with through -hole, the first joint is fixed in one end of the through -hole, the second joint is inserted from the other end of the through -hole and makes the hemispherical protrusion place in the hemispherical recess, the side surface of the first joint is equipped with the insertion slot for installing the hall sensor.

[0004] In some possible embodiments, one end of the first joint is provided with a first mounting groove, one end of the second joint is provided with a second mounting groove, one end of the flexible coil is fixedly inserted into the first mounting groove, and the other end of the flexible coil is fixedly inserted into the second mounting groove.

[0005] In some possible embodiments, the first joint is sleeved with a first insulating sleeve, and one end of the flexible coil is fixedly connected with the first joint, and the second joint is sleeved with a second insulating sleeve, and the other end of the flexible coil is fixedly connected with the second joint.

[0006] In some possible embodiments, the inner diameter of the second insulating sleeve is greater than the outer diameter of the first joint and can be sleeved on the first joint.

[0007] In some possible embodiments, the shell is provided with a rotatable locking nut, the second insulating sleeve is formed with an external thread matched with the locking nut, and the second insulating sleeve extends axially to completely cover the hemispherical protrusion.

[0008] In some possible embodiments, at least one fixing ring groove is formed in the side wall of the shell and located at the side of the through hole, and the fixing ring groove is filled with adhesive to fix the first connector to one end of the through hole.

[0009] In some possible embodiments, the slot depth of the slot is greater than half of the thickness of the first connector, and the inductive center axis of the Hall sensor is coincident with the center axis of the first connector.

[0010] In some possible embodiments, the side wall of the shell is provided with a mounting position 14 for placing a circuit board, and the connecting end of the Hall sensor is led out of the shell and connected to the circuit board.

[0011] Compared with the prior art, the utility model has the advantages that the utility model is provided with the first connector and the second connector at the two ends of the flexible coil, the end of the first connector is provided with the semispherical recess, the end of the second connector is provided with the semispherical protrusion, the two ends of the flexible coil are connected and closed through the first connector and the second connector after the flexible coil is sleeved with the measured wire, the slot is formed in the side of the first connector, and the Hall sensor is inserted into the slot, the structure of the utility model is connected with the minimum gap at the two ends of the flexible coil during measurement, so that the magnetic loss is small, and thus the measurement precision of the flexible coil is improved, and the measurement error is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0013] Figure 1 It is the cross-sectional structure diagram of the spherical surface connecting structure of the embodiment of the utility model;

[0014] Figure 2 It is the structure assembly schematic view of the spherical surface connecting structure of the embodiment of the utility model.

[0015] Explanation of reference numerals: shell 10, through hole 11, locking nut 12, fixing ring groove 13, mounting position 14, flexible coil 20, first connector 21, first insulating sleeve 211, semispherical recess 212, first mounting slot 213, slot 214, second connector 22, second insulating sleeve 221, semispherical protrusion 222, second mounting slot 223, Hall sensor 30. DETAILED DESCRIPTION

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figure 1 and Figure 2 The spherical connection structure of the flexible coil shown includes a housing 10, a flexible coil 20, and a Hall sensor 30. One end of the flexible coil 20 is fitted with a first connector 21, and the other end is fitted with a second connector 22. A hemispherical groove 212 is formed on the first connector 21, and a corresponding hemispherical protrusion 222 is formed on the second connector 22. A through hole 11 is provided on the housing 10. The first connector 21 and one end of the flexible coil 20 are fixed to one end of the through hole 11. The other end of the flexible coil 20 is inserted into the through hole 11 after passing around the conductor being measured. At the other end, the hemispherical protrusion 222 is connected to the hemispherical groove 212, so that the two ends of the flexible coil 20 are always connected with the minimum gap during measurement, thus the magnetic loss is very small. The side of the first connector 21 is provided with a slot 214, and the Hall sensor 30 is inserted into the slot 214 to read the induction signal of the flexible coil 20. It should be noted that in order to achieve closed conduction at both ends of the flexible coil 20 during measurement, the materials used for the first connector 21 and the second connector 22 should be the same as the material of the flexible coil 20.

[0018] In some possible embodiments, one end of the first connector 21 is provided with a first mounting groove 213, and one end of the second connector 22 is provided with a second mounting groove 223. One end of the flexible coil 20 is fixedly inserted into the first mounting groove 213 and connected to the first connector 21 for conduction, and the other end is fixedly inserted into the second mounting groove 223 and connected to the second connector 22 for conduction. During measurement, the first connector 21 and the second connector 22 are connected and closed through the hemispherical groove 212 and the hemispherical protrusion 222 to avoid the flexible coil 20 being open-circuited and causing measurement distortion.

[0019] In some possible embodiments, the first joint 21 is sleeved with a first insulating sleeve 211, one end of the first insulating sleeve 211 is sleeved on one end of the flexible coil 20, and the other end of the first insulating sleeve 211 is sleeved on the first joint 21, so that one end of the flexible coil 20 is fixedly connected with the first joint 21, and the first joint 21 is also fixedly connected in the shell 10 through the first insulating sleeve 211, so as to avoid that one end of the first joint 21 / flexible coil 20 is exposed and does not meet the regulatory requirements; the second joint 22 is sleeved with a second insulating sleeve 221, one end of the second insulating sleeve 221 is sleeved on the other end of the flexible coil 20, and the other end of the second insulating sleeve 221 is sleeved on the second joint 22, so that the other end of the flexible coil 20 is fixedly connected with the second joint 22.

[0020] In some possible embodiments, the inner diameter of the second insulating sleeve 221 is greater than the outer diameter of the first joint 21, and the second insulating sleeve 221 can be sleeved on the first joint 21 when the first joint 21 and the second joint 22 are connected, so as to avoid interference between the second insulating sleeve 221 and the first joint 21.

[0021] In some possible embodiments, the shell 10 is further provided with a rotatable locking nut 12, the second insulating sleeve 221 is externally formed with external threads matched with the locking nut 12, the second joint 22 is inserted into the through hole 11 and gradually extends into the through hole 11 until the hemispherical protrusion 222 of the second joint 22 is in close contact with the hemispherical groove 212 of the first joint 21 by screwing the locking nut 12, and in the embodiment, the threaded connection between the locking nut 12 and the second insulating sleeve 221 can realize self-locking, so that the staff does not need to press the first joint 21 and the second joint 22 all the time, which facilitates the staff to operate the Hall sensor 30 to connect the measuring instrument or other work. Furthermore, the second insulating sleeve 221 extends along the axial direction to completely cover the hemispherical protrusion 222, which aims to meet the regulatory requirements and avoid that the working part of the flexible coil 20 is exposed.

[0022] In some possible embodiments, the shell 10 can be obtained by threadedly connecting or adhesively fixing two shells, at least one fixing ring groove 13 is arranged on the side wall of the through hole 11, and an adhesive is filled in the fixing ring groove 13 to fix one end of the first joint 21 / flexible coil 20 in the shell 10.

[0023] In some possible embodiments, the slot depth of the slot 214 is greater than half the thickness of the first joint 21, so that after the Hall sensor 30 is inserted into the slot 214, the sensing central axis of the Hall sensor 30 coincides with the central axis of the first joint 21, and the measurement error is further reduced.

[0024] In some possible embodiments, the side wall of the shell 10 is provided with a mounting position 14 for placing a circuit board, and the connecting end of the Hall sensor 30 is led out from the shell 10 and connected with the circuit board.

[0025] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any change or replacement within the technical range disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A spherical connection structure of a flexible coil, characterized by, The utility model provides a flexible coil and Hall sensor fixing structure, which comprises a shell (10), a flexible coil (20) and a Hall sensor (30), one end of the flexible coil (20) is sleeved with a first connector (21), the other end is sleeved with a second connector (22), a hemispherical recess (212) is formed on the first connector (21), a corresponding hemispherical protrusion (222) is formed on the second connector (22), a through hole (11) is arranged on the shell (10), the first connector (21) is fixed at one end of the through hole (11), the second connector (22) is inserted from the other end of the through hole (11) and the hemispherical protrusion (222) is placed in the hemispherical recess (212), and a slot (214) for mounting the Hall sensor (30) is formed on the side of the first connector (21).

2. The spherical connection structure of a flexible coil according to claim 1, wherein A first mounting slot (213) is formed at one end of the first connector (21), a second mounting slot (223) is formed at one end of the second connector (22), one end of the flexible coil (20) is fixedly inserted into the first mounting slot (213), and the other end of the flexible coil (20) is fixedly inserted into the second mounting slot (223).

3. The spherical connection structure of a flexible coil according to claim 2, wherein The first connector (21) is sleeved with a first insulating sleeve (211), and one end of the flexible coil (20) is fixedly connected with the first connector (21); the second connector (22) is sleeved with a second insulating sleeve (221), and the other end of the flexible coil (20) is fixedly connected with the second connector (22).

4. The spherical connection structure of a flexible coil according to claim 3, wherein The inner diameter of the second insulating sleeve (221) is greater than the outer diameter of the first connector (21) and can be sleeved on the first connector (21).

5. The spherical connection structure of a flexible coil according to claim 3, wherein A rotatable locking nut (12) is arranged on the shell (10), an external thread is formed on the second insulating sleeve (221) and matched with the locking nut (12), and the second insulating sleeve (221) extends in the axial direction to completely cover the hemispherical protrusion (222).

6. The spherical connection structure of a flexible coil according to claim 1, wherein At least one fixing ring groove (13) is formed in the side wall of the through hole (11) in the shell (10), the first connector (21) is fixedly connected at one end of the through hole (11) by filling adhesive in the fixing ring groove (13).

7. The spherical connection structure of a flexible coil according to claim 1, wherein The slot depth of the slot (214) is greater than half the thickness of the first connector (21), and the sensing center axis of the Hall sensor (30) coincides with the center axis of the first connector (21).

8. The spherical connection structure of a flexible coil according to claim 1, wherein A mounting position (14) for placing a circuit board is formed in the side wall of the shell (10), and the connecting end of the Hall sensor (30) is led out of the shell (10) and connected with the circuit board.

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