Background
The currently applied extracorporeal shock wave lithotripter adopts the following shock wave generation sources according to different working principles: a liquid electric shock wave source, a piezoelectric shock wave source and an electromagnetic shock wave source.
Liquid electric shock wave generation source: the principle of generating shock waves is that high-voltage spark discharge occurs in water by electrodes. When the electrode discharges in the propagation medium water, the surrounding water medium is explosively evaporated immediately due to the liquid-electric effect, and plasma which rapidly expands is formed to generate shock waves in the surrounding liquid.
Piezoelectric shock wave generation source: the principle of generating shock waves is the piezoelectric effect. A plurality of piezoelectric crystal blocks are arranged on the inner surface of the spherical disc to form a series of piezoelectric transmitters, and each time a high-frequency pulse voltage is input to each piezoelectric crystal block, the piezoelectric crystals deform, and the high-frequency deformation of the crystals causes the surrounding water medium to generate shock waves.
Electromagnetic shock wave generating source: the principle of generating shock waves is electromagnetic induction. An inductance coil is discharged through a charged high-voltage capacitor, a strong pulse magnetic field is formed by the generated pulse current, a vibrating diaphragm covered on the coil induces to generate a magnetic field, the vibrating diaphragm magnetic field and the coil magnetic field interact to generate repulsive force, and shock waves are formed on the other surface of the vibrating diaphragm in the water medium. The electromagnetic shock wave generating sources are basically electromagnetic disk plus lens, and the electromagnetic shock wave generating sources are focused by the lens.
The existing electromagnetic shock wave generating sources are all in a mode of adding convex lenses to an electromagnetic disc, an ultrasonic probe cannot be embedded in the wave sources technically, and the ultrasonic probe is clamped and fixed on the upper side or the lower side or the left side and the right side of a water bag of a stone crusher in a mechanical arm mode, so that the operation difficulty of an operator is high.
Disclosure of Invention
An object of the utility model is to provide an electromagnetic head and electromagnetic shock wave generating source are used for solving the technical problem that above-mentioned exists.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides an electromagnetic head, includes the main part, the main part is equipped with the through-hole that runs through its upper and lower terminal surface, the lateral surface of main part inwards draws in gradually from bottom to top, the main part includes coil, vibrating diaphragm and sealing layer, the coil surrounds in the through-hole outside, the vibrating diaphragm cover is established in the outside of coil, the sealing layer cover is established in the outside of vibrating diaphragm, and the bottom sealing connection of its lower extreme and main part.
Furthermore, the through hole is a circular through hole with the same diameter, the outer side surface of the main body part is of a cylindrical structure, and the diameter of the main body part is gradually reduced from bottom to top.
Furthermore, the side wall of the through hole is also provided with an axial yielding groove.
Furthermore, the number of the yielding grooves is two, and the yielding grooves are respectively arranged on two opposite sides of the side wall of the through hole.
Further, the sealing layer is made of elastic sealing materials.
Furthermore, the bottom surface of the main body part is provided with two electrical interconnection holes, binding posts are arranged in the electrical interconnection holes, and the binding posts are electrically connected with the coil.
Further, the heights of the posts of the two electrical interconnection holes are different.
The utility model also discloses an electromagnetic shock wave takes place source, including reflection cup and foretell electromagnetism head, the inner wall of reflection cup is the paraboloid, the electromagnetism head sets up in the reflection cup, the bottom and the reflection cup bottom sealing connection of electromagnetism head, reflection bottom of cup portion is equipped with the hole of stepping down corresponding to the through-hole.
Furthermore, the cup also comprises a water sac which is arranged on the cup mouth of the reflection cup in a sealing way.
Furthermore, the bottom of the electromagnetic head is locked and fixed with the bottom of the reflecting cup through screws.
The utility model has the advantages of:
the utility model discloses an electromagnetic head is equipped with the through-hole that runs through its upper and lower terminal surface, can let ultrasonic probe embed in the wave source, makes ultrasonic wave and external shock wave reach the coaxial effect of concentric core to reduce operator's the operation degree of difficulty, and the lateral surface of the main part of electromagnetic head inwards draws in by lower up gradually, and the cooperation reflects the focus of cup, gathers the energy better.
Further advantageous technical effects will be described in detail in the following specific examples.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1 to 5, an electromagnetic head 1 includes a main body portion, the main body portion is provided with a through hole 14 penetrating through upper and lower end surfaces (based on the position of fig. 4), an outer side surface of the main body portion is gradually folded from bottom to top inward to form a frustum-shaped structure, the main body portion includes a coil 11, a diaphragm 12 and a sealing layer 13, the coil 11 surrounds the through hole 14, the diaphragm 12 is sleeved on the outer side of the coil 11, the sealing layer 13 is sleeved on the outer side of the diaphragm 12, the lower end of the sealing layer is hermetically connected with the bottom of the main body portion, and the upper end of the sealing layer is hermetically connected with an ultrasonic sleeve component.
Through setting up through-hole 14, can let ultrasonic probe embed in the wave source, the probe can freely pass in and out in electromagnetic head 1 is inside, makes ultrasonic wave and external shock wave reach concentric coaxial effect, and the lateral surface of main part draws in from bottom to top gradually inwards, and the focus of cooperation reflection cup 2 gathers energy better.
In this embodiment, the through hole 14 is a circular through hole with an equal diameter, so that the ultrasonic sleeve 6 can be correspondingly of a cylindrical structure, the manufacturing is simple and convenient, and the processing cost is reduced. Of course, in other embodiments, the through hole 14 may also be shaped, such as polygonal, oval, etc., which can be easily realized by those skilled in the art and will not be described in detail.
In this embodiment, the outer side surface of the main body is preferably a cylindrical structure, the diameter of the main body gradually decreases from bottom to top, and the main body is in a truncated cone structure, so as to better match the reflection cup 2 for focusing and better gather energy.
In this embodiment, the coil 11 surrounds the through hole 14, the diameter of the outer side surface of the coil 11 gradually decreases from bottom to top, the vibrating diaphragm 12 is sleeved on the outer side of the coil 11, the vibrating diaphragm 12 is preferably made of a metal material, such as spring steel or beryllium bronze, and the sealing layer 13 is sleeved on the outer side of the vibrating diaphragm 12, the lower end of the sealing layer is hermetically connected with the bottom of the main body portion, and the upper end of the sealing layer is hermetically connected with the ultrasonic sleeve assembly.
In this embodiment, the sealing layer 13 is made of an elastic sealing material such as rubber. The ultrasonic sleeve seat 4 can be completely wrapped after being embedded, the sleeve fastening ring 5 is completely closed after being sleeved, the ultrasonic sleeve 6 can freely move in the circular through hole 14 of the ultrasonic sleeve seat 4 and the electromagnetic head 1, the installation is simple and convenient, and the sealing effect is good.
In this embodiment, the sidewall of the through hole 14 is further provided with an axial receding groove 141, so that a probe with a larger scanning area, such as an abdominal probe, can pass through the electromagnetic head 1, and the extended probe can rotate at any angle in the wave source. Of course, in the abdominal probe embodiment, the ultrasonic sleeve holder 4 and the ultrasonic sleeve 6 are also modified accordingly, which can be easily implemented by those skilled in the art and will not be described in detail.
In this embodiment, the number of the receding grooves 141 is two, and the receding grooves are respectively disposed on two opposite sides of the sidewall of the through hole 14.
The function of the relief groove 141 is to allow a large probe to pass through the electromagnetic head 1.
In this embodiment, the bottom surface of the main body portion is provided with two electrical interconnection holes 15, a terminal 16 is arranged in the electrical interconnection hole 15, the terminal 16 is electrically connected with the coil 11, the butt joint end is a concave column, the concave-convex embedding forms rapid butt joint, and the connection effect is good.
Preferably, the heights of the terminals 16 of the two electrical interconnection holes 15 are different, so that the terminals 16 can be conveniently embedded in a concave-convex mode, and the resistance of the tight fit of the concave-convex columns can be dispersed.
As shown in fig. 4, the utility model also discloses an electromagnetic shock wave generating source, including reflection cup 2 and foretell electromagnetism head 1, the inner wall of reflection cup 2 is the paraboloid, electromagnetism head 1 sets up in reflection cup 2, the bottom and the reflection cup 2 bottom sealing connection of electromagnetism head 1, reflection cup 1 bottom is equipped with the hole of stepping down 21 corresponding to through-hole 14 for ultrasonic transducer can freely pass in and out at the through-hole 14 of electromagnetism head 1. The reflecting cup 2 is adopted for focusing, and the shock wave can be focused without damage.
Preferably, in this embodiment, the reflector cup 2 is a 220mm large-caliber metal parabolic reflector cup, which has a large incident area, so that the incident energy per unit area is reduced, and the treatment depth reaches 150 mm.
Be equipped with the stand on the bottom of reflection cup 2, there is the counter bore (not shown in the figure) at the stand center, and the stand stretches into electric interconnection hole 15, and the counter bore of stand is that the concave post cover is established and is realized electrical connection at terminal 16, and electromagnetism 1's bottom is preferred to adopt screw locking in reflection cup 2 bottoms, and there is the thread reflection cup 2 bottoms, and the installation is simple, and the fastness is good, guarantees the stability that concave post and terminal 16 link to each other.
The electromagnetic shock wave generating source further comprises a water bag 3, and the water bag 3 is hermetically arranged on the cup mouth of the reflecting cup 2.
The installation process comprises the following steps: electromagnetic head 1 is installed on reflection cup 2, the high-voltage line passes through the concave post and accomplishes electrical connection with terminal 16, turn over the sealing layer 13 upper end outwards and turn over down, then wear to establish ultrasonic sleeve 6 in through-hole 14 and the hole 21 of stepping down, ultrasonic sleeve seat 4 covers is established outside ultrasonic sleeve 6, and imbed electromagnetic head 1's main part top, sealing layer 13 turns up again and wraps up it, it is airtight to sheathe in sleeve tight circle 5 again, ultrasonic sleeve 6 has established the passageway for ultrasonic probe's business turn over, set up water pocket 3 is sealed on reflection cup 2's rim of a cup at last. When the water-saving shock wave generator is used, the wave source is filled with water until the water bag 3 swells, the coil 11 is discharged through the charged high-voltage capacitor, the generated pulse current forms a strong pulse magnetic field, the vibrating diaphragm 12 covered on the coil 11 forms a pulse pressure wave due to the repulsion force, and the repulsion force pushes the formed sound wave to be focused through the reflecting cup 2 to form a shock wave.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.