Intravascular ultrasonic imaging rotary communication interface device

Abstract

The utility model provides an intravascular ultrasonic imaging rotary communication interface device. The intravascular ultrasonic imaging rotary communication interface device comprises a rotating shaft, a shell and a rotary communication unit arranged in the shell, the rotary communication unit comprises a first coil used for being connected with the ultrasonic transducer and a second coil used for being connected with an external alternating current power supply, and the first coil and the second coil are wound on the outer side of the rotating shaft and are coaxially and oppositely arranged; a cylindrical first magnetic core is arranged between the rotating shaft and the first coil in a sleeving manner, and the first magnetic core is fixed on the rotating shaft; a cylindrical second magnetic core is further arranged between the rotating shaft and the second coil in a sleeving manner, and the second magnetic core is in clearance fit with the rotating shaft; a magnetic ring is sleeved outside the first coil and the second coil, and the magnetic ring is fixed in the shell. By the adoption of the technical scheme, the whole structure is compact, the assembly size is small, the anti-interference capacity is high, the multiple shaft shoulders are arranged on the rotating shaft to form a multi-section structure, assembly is convenient, the assembly structure is stable, and performance is reliable.

Description

Technical Field

[0001] The utility model relates to an intravascular ultrasonic imaging rotation communication interface device, belonging to the technical field of intravascular ultrasonic imaging. Background Art

[0002] The principle of the intravascular ultrasound imaging system is based on the transmission and reception of ultrasonic signals. Generally, a catheter is placed in the blood vessel cavity, and a rotating imaging core is arranged in the catheter. The rotating imaging core includes a flexible mandrel and a miniaturized ultrasonic transducer. The mandrel is driven by a motor to rotate, thereby driving the ultrasonic transducer to rotate and obtain the cross-sectional morphology of the blood vessel. Since the ultrasonic transducer is in a rotating state, the prior art uses a brush and a conductive slip ring to contact the rotating signal to transmit the stationary signal. Since the friction between the brush and the conductive ring is inevitable, the brush and the conductive ring are easy to wear, which will lead to poor contact after wear, and often cause many interference signals to appear. At the same time, the brush will also vibrate when rotating at high speed, resulting in poor contact, which limits the rotation speed of the brush method. In view of this, US Patent Document US2015228406A1 discloses a rotary transformer device for intravascular ultrasound, and US Patent Document US2019357879A1 discloses an intravascular ultrasound probe with a movable rotating element, both of which are transmitted through two relatively arranged coils, without the need to set brushes and conductive rings. In the above structure, the two coils need to be coaxially arranged, and their installation accuracy and structural compactness need to be guaranteed; the two induction coils are wound radially outward and arranged face to face, which will form parasitic capacitance and introduce interference signals that affect the communication quality; at the same time, since the two induction coils communicate through electromagnetic induction, they are easily interfered by other external electromagnetic signals. Utility Model Content

[0003] Therefore, an object of the present utility model is to provide an intravascular ultrasound imaging rotation communication interface device with a relatively compact installation structure.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an intravascular ultrasound imaging rotary communication interface device, comprising a rotating shaft, a shell and a rotating communication unit arranged in the shell; the rotating communication unit comprises a first coil for connecting to an ultrasonic transducer and a second coil for connecting to an external AC power supply, the first coil and the second coil are respectively wound around the outside of the rotating shaft and are coaxially arranged opposite to each other; a cylindrical first magnetic core is also sleeved between the rotating shaft and the first coil, and the first magnetic core is fixed on the rotating shaft; a cylindrical second magnetic core is also sleeved between the rotating shaft and the second coil, and the second magnetic core is loosely matched with the rotating shaft; a magnetic ring is also sleeved on the outside of the first coil and the second coil, and the magnetic ring is fixed in the shell.

[0005] The rotating shaft is partially located inside the shell and partially located outside the shell. The part of the rotating shaft located outside the shell is used to connect to the core shaft of the intravascular ultrasound imaging system.

[0006] A first shoulder is provided on the rotating shaft, the rotating shaft is inserted from one end of the shell and the first shoulder presses against a first bearing on one side edge of the shell, the end of the rotating shaft passes out from the shell and is fixedly connected to a fixed block, and the fixed block presses against a second bearing on the other side edge of the shell.

[0007] A second shaft shoulder is arranged on the rotating shaft, and one end of the first magnetic core close to the first shaft shoulder is pressed against the second shaft shoulder.

[0008] The second magnetic core is arranged in parallel on a side of the first magnetic core away from the second shaft shoulder; the inner diameter of the first magnetic core is smaller than the inner diameter of the second magnetic core.

[0009] In addition, the inner diameters of the first magnetic core and the second magnetic core may also be the same; a third shoulder is also provided on the rotating shaft, the first magnetic core is located on one side of the third shoulder, and the second magnetic core is located on the other side of the third shoulder, so that a gap is formed between the second magnetic core and the rotating shaft.

[0010] A section of the rotating shaft located outside the shell is a hollow section, a cavity of the hollow section extends to the inside of the first magnetic core, and a through hole is provided on the rotating shaft located inside the first magnetic core for wiring.

[0011] A first wiring hole is arranged at the end of the first magnetic core, and a first wiring groove communicating with the first wiring hole is arranged on the outer side wall of the first magnetic core.

[0012] A convex ring portion protruding radially outward is provided at one end of the second magnetic core away from the first magnetic core, and the convex ring portion is tightly fixed to the end of the magnetic ring.

[0013] A second wiring groove is formed on the outer side wall of the second magnetic core, and a second wiring hole communicating with the first wiring groove is formed on the convex ring portion.

[0014] By adopting the above technical scheme, in the utility model of the intravascular ultrasound imaging rotary communication interface device, the rotary communication unit is two induction coils arranged opposite to each other on a coaxial line, namely, a first coil and a second coil. Passing a pulse current into the second coil can form an induced current in the first coil and drive the ultrasonic transducer to work, and the echo signal of the ultrasonic transducer generates an induced magnetic field in the first coil and an induced electromotive force in the second coil, thereby realizing the communication of the ultrasonic transducer during the rotation process; the rotary communication unit is integrated in the shell, and the first magnetic core and the second magnetic core, the first coil and the second coil, and the magnetic ring are sequentially sleeved on the outside of the rotating shaft. The overall structure is compact, the assembly size is small, and the anti-interference ability is strong. A plurality of shoulders are arranged on the rotating shaft to form a multi-section structure, which is easy to assemble, and the assembly structure is stable and the performance is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the rotating shaft.

[0017] Figure 3 It is a schematic structural diagram of the first magnetic core.

[0018] Figure 4 It is a schematic structural diagram of the second magnetic core. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below through the accompanying drawings and specific implementation methods.

[0020] like Figure 1 As shown, an intravascular ultrasound imaging rotation communication interface device of the utility model includes a rotating shaft 1, a shell 7, and a driving unit and a rotation communication unit arranged in the shell 7.

[0021] The rotating shaft 1 is partially located inside the housing 7 and partially located outside the housing 7. The section of the rotating shaft 1 located outside the housing 7 is used to connect to the core shaft of the intravascular ultrasound imaging system.

[0022] The rotating communication unit includes a first part for connecting to the ultrasonic transducer and a second part connected to the external power supply. The first part is relatively fixed to the rotating shaft 1, and the second part is relatively fixed to the housing 7. The first part and the second part are electrically connected in a non-contact manner. In this embodiment, the first part includes a first coil 2, and the second part is a second coil 3. The first coil 2 and the second coil 3 are respectively spirally wound on the outside of the rotating shaft 1 along the axial direction and are arranged coaxially opposite to each other. The second coil 3 is used for an external AC power supply. Passing a pulse current into the second coil 3 can form an induced current in the first coil 2 and drive the ultrasonic transducer to work. The echo signal of the ultrasonic transducer generates an induced magnetic field in the first coil 2 and an induced electromotive force in the second coil 3, thereby realizing the communication of the ultrasonic transducer during the rotation process.

[0023] A first magnetic core 4 is sleeved between the rotating shaft 1 and the first coil 2, and the first magnetic core 4 is fixed on the rotating shaft 1. A second magnetic core 5 is sleeved between the rotating shaft 1 and the second coil 3, and the second magnetic core 5 is loosely matched with the rotating shaft 1.

[0024] A magnetic ring 6 is also sleeved outside the first coil 2 and the second coil 3, and the magnetic ring 6 is fixed in the housing 7. The second magnetic core 5 is located between the first magnetic core 4 and the drive unit, and one end of the second magnetic core 5 close to the drive unit is provided with a convex ring portion 5.1 protruding radially outward, and the convex ring portion 5.1 is tightly fixed to the end of the magnetic ring 6. The magnetic ring 6 is covered outside the first coil 2 and the second coil 3, and plays an anti-interference role in the signals transmitted by the first coil 2 and the second coil 3.

[0025] like Figure 2 As shown, the first shoulder 1.5 and the second shoulder 1.6 are sequentially arranged on the rotating shaft 1, so that the outer diameter of the rotating shaft 1 is reduced in sections. The rotating shaft 1 is inserted from one end of the housing 7 and passes through the other end of the housing 7. A first bearing 8 is arranged at one end of the housing 7, and a flange bearing 9 (i.e., a second bearing) is installed at the other end of the housing 7 through a flange fixing seat 10. The first shoulder 1.5 supports the first bearing 8. The other end of the rotating shaft 1 is provided with an external thread 1.4, which is screwed onto a fixing block 19 after passing through the housing 7 to the outside, and the fixing block 19 supports the flange bearing 9.

[0026] One end of the first magnetic core 4 close to the first shoulder 1.5 rests on the second shoulder 1.6. Optionally, the inner diameters of the first magnetic core 4 and the second magnetic core 5 are different, the inner diameter of the second magnetic core 5 is larger, and the two are arranged side by side on the outside of the second shoulder 1.6. In addition, the inner diameters of the first magnetic core 4 and the second magnetic core 5 can also be the same, and the shaft 1 also has a third shoulder 1.7 with an outer diameter smaller than the outer diameter of the second shoulder 1.6, and the third shoulder 1.7 is located on the side of the second shoulder 1.6 away from the first shoulder 1.5, the first magnetic core 4 is located on one side of the third shoulder 1.7, and the second magnetic core 5 is located on the other side of the third shoulder 1.7, so that a gap is formed between the second magnetic core 5 and the shaft 1.

[0027] The section of the rotating shaft 1 located outside the housing 7 is a hollow section 1.1, and the section located inside the housing 7 is a shaft section 1.2. The cavity in the hollow section 1.1 extends to the radial inner side of the first magnetic core 4, and a through hole 1.3 is provided on the rotating shaft 1 located radially inside the first magnetic core 4 for wiring. Figure 3 As shown, a first wiring hole 4.2 is provided at the end of the first magnetic core 4, and a first wiring groove 4.1 connected to the first wiring hole 4.2 is provided on the outer wall of the first magnetic core 4. The wire connected to the ultrasonic transducer can pass through the through hole, the first wiring hole 4.2 and the first wiring groove 4.1 to connect to the first coil 2.

[0028] like Figure 4 As shown, a second wiring groove 5.2 is provided on the outer wall of the second magnetic core 5, and a second wiring hole 5.3 connected to the second wiring groove 5.2 is provided on the convex ring portion 5.1, and the wire of the external power supply can pass through the second wiring hole 5.3 and the second wiring groove 5.2 to connect to the second coil 3.

[0029] The driving unit includes a permanent magnet rotor 16, a stator 17 and a stator coil 18. The plurality of permanent magnet rotors 16 are fixed on the rotating shaft 1. The stator 17 is cylindrical and is sleeved on the permanent magnet rotor 16 and the outside. The stator 17 is provided with winding grooves, and the plurality of stator coils 18 are wound in the winding grooves.

[0030] Through the above technical scheme, the rotating shaft 1 is installed on the shell 7, one end of the rotating shaft 1 is used to connect the core shaft of the intravascular ultrasound imaging system, and the permanent magnet rotor 16, stator 17 and stator coil 18 that realize the motor function are integrated in the shell 7, so that the stator coil 18 can drive the rotating shaft 1 to rotate after being energized, and the rotation of the core shaft drives the first part of the rotating communication unit to rotate synchronously at the same time. The first part communicates with the second part to send a pulse signal to the ultrasonic transducer and receive feedback information from the ultrasonic transducer, thereby forming a rotation drive interface of the integrated intravascular ultrasound imaging system to realize the rotation drive function and the communication function.

[0031] In this embodiment, the stator 17 is slidably matched with the inner wall of the housing 7; the stator 17 is connected to a pushing device, and the pushing device is used to push the stator 17 to move axially.

[0032] Specifically, the pushing device includes a connecting rod assembly connected to the stator 17 and a return spring 15. The connecting rod assembly is provided with a pressing portion. Pressing the pressing portion can drive the stator 17 to move. The return spring 15 is used to provide a return elastic force to the pressing portion.

[0033] The connecting rod assembly includes a first connecting rod 14, a second connecting rod 13, a first hinge seat 12 and a second hinge seat 11 which are hinged on the housing 7. The first hinge seat 12 passes through the housing 7 and is fixed on the stator 17. The housing 7 is provided with a through slot extending in the axial direction at a position corresponding to the first hinge seat 12 to allow the first hinge seat 12 to move in the axial direction. The end of the second connecting rod 13 is hinged to the first hinge seat 12. The end of the first connecting rod 14 away from the first hinge seat 12 is the pressing portion, and the end of the second connecting rod 13 away from the second hinge seat 11 is hinged to the middle of the first connecting rod 14.

[0034] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention of the utility model.

Claims

1. A rotary communication interface device for intravascular ultrasound imaging, characterized in that: It includes a rotating shaft, a shell and a rotating communication unit arranged in the shell; the rotating communication unit includes a first coil for connecting to an ultrasonic transducer and a second coil for connecting to an external AC power supply, the first coil and the second coil are respectively wound around the outside of the rotating shaft and are arranged coaxially opposite to each other; a cylindrical first magnetic core is also sleeved between the rotating shaft and the first coil, and the first magnetic core is fixed on the rotating shaft; a cylindrical second magnetic core is also sleeved between the rotating shaft and the second coil, and the second magnetic core is loosely matched with the rotating shaft; a magnetic ring is also sleeved on the outside of the first coil and the second coil, and the magnetic ring is fixed in the shell.

2. The intravascular ultrasound imaging rotation communication interface device according to claim 1, characterized in that: A first shoulder is provided on the rotating shaft, the rotating shaft is inserted from one end of the shell and the first shoulder presses against a first bearing on one side edge of the shell, the end of the rotating shaft passes out from the shell and is fixedly connected to a fixed block, and the fixed block presses against a second bearing on the other side edge of the shell.

3. The intravascular ultrasound imaging rotation communication interface device according to claim 2, characterized in that: A second shaft shoulder is arranged on the rotating shaft, and one end of the first magnetic core close to the first shaft shoulder is pressed against the second shaft shoulder.

4. The intravascular ultrasound imaging rotation communication interface device according to claim 3, characterized in that: The second magnetic core is arranged in parallel on a side of the first magnetic core away from the second shaft shoulder; the inner diameter of the first magnetic core is smaller than the inner diameter of the second magnetic core.

5. The intravascular ultrasound imaging rotation communication interface device according to claim 3, characterized in that: The inner diameters of the first magnetic core and the second magnetic core are the same; a third shoulder is also provided on the rotating shaft, the first magnetic core is located on one side of the third shoulder, and the second magnetic core is located on the other side of the third shoulder, so that a gap is formed between the second magnetic core and the rotating shaft.

6. The intravascular ultrasound imaging rotation communication interface device according to any one of claims 1 to 5, characterized in that: The rotating shaft is partially located inside the shell and partially located outside the shell. The part of the rotating shaft located outside the shell is used to connect to the core shaft of the intravascular ultrasound imaging system.

7. The intravascular ultrasound imaging rotation communication interface device according to any one of claims 1 to 5, characterized in that: A section of the rotating shaft located outside the shell is a hollow section, a cavity of the hollow section extends to the inside of the first magnetic core, and a through hole is provided on the rotating shaft located inside the first magnetic core for wiring.

8. The intravascular ultrasound imaging rotation communication interface device according to claim 7, characterized in that: A first wiring hole is arranged at the end of the first magnetic core, and a first wiring groove communicating with the first wiring hole is arranged on the outer side wall of the first magnetic core.

9. The intravascular ultrasound imaging rotation communication interface device according to any one of claims 1 to 5, characterized in that: A convex ring portion protruding radially outward is provided at one end of the second magnetic core away from the first magnetic core, and the convex ring portion is tightly fixed to the end of the magnetic ring.

10. The intravascular ultrasound imaging rotation communication interface device according to claim 9, characterized in that: A second wiring groove is formed on the outer side wall of the second magnetic core, and a second wiring hole communicating with the first wiring groove is formed on the convex ring portion.

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