CN107296657B

CN107296657B - Dental turbine hand-held drill

Info

Publication number: CN107296657B
Application number: CN201710418420.5A
Authority: CN
Inventors: 刘晓霞
Original assignee: Zhengzhou Zezheng Technical Services Ltd
Current assignee: Du Lihong
Priority date: 2012-11-19
Filing date: 2012-11-19
Publication date: 2019-12-06
Anticipated expiration: 2032-11-19
Also published as: CN107296658B; CN107296657A; CN103815975B; CN103815975A; CN107296658A

Abstract

A dental turbine handheld drill comprises a machine head shell and a machine core, wherein the machine head shell is provided with a machine needle jack, the machine core comprises a turbine and a turbine shaft, an LED lamp is arranged outside the position of the drill needle jack and surrounds the turbine shaft, and the LED lamp is connected with a power supply arranged in the machine head shell; the power supply is a micro-generator, which means: the turbine in the machine head shell is a magnet turbine with the magnetic direction parallel to the turbine shaft, the outer sides of one end or two ends of the magnet turbine are provided with conductive circular ring pieces, the conductive circular ring pieces are fixed in the machine head shell, and the magnetic force lines at the end part of the magnet turbine penetrate through the conductive circular ring pieces; the inner side and the outer side along the radial direction of the conductive ring piece are correspondingly and electrically connected with the anode and the cathode of the LED lamp. Because the machine head is used as a part of the generator, only the induction conductive circular ring piece is added in the original machine head, the magnetic resistance is stable during generating, the formed direct current generator has no problem of vibration caused by dynamic balance, a driving circuit, a switching power supply and the like are not needed, and the problem that a circuit cannot be arranged in the machine head is solved. The lamp filaments are arranged in a ring shape, so that the drill bit is a shadowless lamp without shading illumination.

Description

Dental turbine hand-held drill

Technical Field

The invention relates to a cutting device for dentistry, in particular to a self-generating dental turbine handheld drill.

Background

Generally, a handpiece as an air-type cutting device for dental use is provided with a head at its distal end, and the head is configured to house a necessary cutting tool. A rotor shaft for holding a cutting tool, 2 bearings for supporting a rotation shaft, and an impeller disposed between the 2 bearings are housed in the head, and the cutting tool is rotated by high-pressure air supplied from an air supply path disposed in a clamp portion of a head striking the impeller. However, in the air-type cutting device with the structure, the machine head extends into the oral cavity, so that the light is easily shielded, the operation is inconvenient, and the light cannot directly irradiate the drill bit in the conventional handheld drill with the lamp; and the anti-suck-back device is complex, the repulsion force of the magnetic bearing is small, and the like, and particularly, the resistance is unstable during power generation, so that imbalance is caused, and the problem of vibration caused by dynamic balance occurs. The invention which is applied by the inventor and is named as an invention patent of a dental turbine handheld drill (hereinafter referred to as a prior application) and has the application number of 201210443538.0, the structure process containing the Halbach array is complex, the cost is high, and most importantly, the cost is increased because the radius of the conductive circular ring sheet is small and the voltage is low, and a universal LED lamp cannot be used; the invention is an invention patent (hereinafter referred to as the prior application 2) with the application number of 201210450061.9 and the name of the invention is dental turbine hand-held drill, because the voltage generated by each layer of conductive ring sheet is too small, the current is needed to be larger, if the required voltage is reached, hundreds of layers of conductive ring sheets are needed to be overlapped, and the thickness is too large.

Disclosure of Invention

It is an object of the present invention to provide a light source that is unobstructed at the drill bit; secondly, a generator formed by the magnets is used for supplying power to the light source, the resistance is stable during power generation, and the problem of vibration caused by dynamic balance is avoided; thirdly, the emitted voltage can reach 1.5-3V, so that the LED lamp is convenient to use; fourthly, the axial space occupied by the generator is reduced.

The invention is realized in this way, a dental turbine hand drill, including the aircraft nose shell and core, the aircraft nose shell sets up the car needle jack, the core includes turbine and turbine shaft, the car needle jack is outside to surround the turbine shaft and set up the LED lamp, the LED lamp connects the power that sets up in the aircraft nose shell; the power supply is a micro generator, and the micro generator is as follows: the turbine in the machine head shell is a magnet turbine with the magnetic direction parallel to the turbine shaft, the outer sides of one end or two ends of the magnet turbine are provided with conductive circular ring pieces, the conductive circular ring pieces are fixed in the machine head shell, and the magnetic force lines at the end part of the magnet turbine penetrate through the conductive circular ring pieces; the inner side and the outer side along the radial direction of the conductive ring piece are correspondingly and electrically connected with the anode and the cathode of the LED lamp.

The machine head shell and the turbine shaft are made of soft magnetic materials.

The machine head shell and the turbine shaft are made of non-soft magnetic materials; the conductive circular ring piece is externally provided with a soft magnetic material ring, and the conductive circular ring piece is arranged between the magnet turbine and the soft magnetic material ring.

The soft magnetic material ring is a bearing sleeved on the turbine shaft or the soft magnetic material ring is sleeved outside the bearing.

The conductive circular ring pieces are printed disc windings, conductors formed by thin copper pieces in the printed disc windings are radially arranged, and each conductor cuts magnetic lines of force and is equivalent to an ultramicro generator. Thus, the printed disc type winding does not rotate, the magnet turbine rotates at high speed, and each conductor cuts magnetic lines of force and is equivalent to a generator, namely a Faraday generator which is equivalent to a part of the rotating disc. When generating electricity, radial gaps are formed among the conductors, and the induced stress of the conductors to the magnet turbine is interrupted, so that the turbine is easy to vibrate. The radial winding can be provided as a separate product.

And the conductors formed by the thin copper sheets in the printed disc winding are arranged in a radial vortex radial mode. Because the conductors are arranged in a radial vortex radial mode, and the gaps between the conductors are also arranged in a radial vortex radial mode, when power is generated, the conductors and the gaps are always arranged in the radial direction, the conductors have continuous inductive stress on the magnet turbine, and turbine vibration cannot be caused. The spiral radial winding can be provided as a separate product.

The ultramicro generators are connected in series. Because the led lamp needs a small current of 5-20mA and a large voltage of 1.5-3V, the serial connection can superpose the voltages of each ultramicro generator to form a high voltage.

The invention uses the machine head as a part of the generator, only adds the inductive conductive ring plate in the original machine head, the magnetic resistance is stable during generating, the formed direct current generator has no vibration problem caused by dynamic balance, and a driving circuit, a switching power supply and the like are not needed, thereby solving the problem that the circuit can not be arranged in the machine head. The lamp filaments are arranged in a ring shape, so that the drill bit is a shadowless lamp without shading illumination; the conductors formed by the thin copper sheets in the printed disc winding are radially arranged, and each conductor cuts magnetic lines of force and is equivalent to an ultramicro generator. Thus, the printed disc type winding does not rotate, the magnet turbine rotates at high speed, and each conductor cuts magnetic lines of force and is equivalent to an ultramicro generator, namely a Faraday generator which is equivalent to a part of the rotating disc. Because the led lamp needs a small current of 5-20mA and a large voltage of 1.5-3V, the ultramicro generators are connected in series, and the voltages of the ultramicro generators can be added together to form a high voltage. When generating electricity, radial gaps are formed among the conductors, and the induced stress of the conductors to the magnet turbine is interrupted, so that the turbine is easy to vibrate. The conductors formed by the thin copper sheets in the printed disc winding are arranged in a radial vortex radial mode. Because the conductors are arranged in a radial vortex radial mode, and the gaps between the conductors are also arranged in a radial vortex radial mode, when power is generated, the conductors and the gaps are always arranged in the radial direction, the conductors have continuous inductive stress on the magnet turbine, and turbine vibration cannot be caused. The radial winding can be provided as a separate product. The spiral radial winding can also be provided as a separate product.

Drawings

FIG. 1 is a schematic cross-sectional structural view of the prior application.

FIG. 2 is a schematic cross-sectional view of a prior application magnet turbine with the magnetic direction parallel to the turbine axis.

FIG. 3 is a schematic cross-sectional structural view of a Halbach array magnet turbine of the prior application Halbach.

Fig. 4 is a schematic cross-sectional view of a conductive circular ring of the prior application.

Fig. 5 is a schematic view of a cross-sectional structure of a conductive circular ring piece arranged above and below the prior application.

FIG. 6 prior application Halbach array bearing interlayer magnetic direction in Heire's Beck Halbach array bearing is in alignment with the axial direction of the turbine shaft

The plane forms a cross-sectional structural schematic diagram of an included angle.

FIG. 7 the magnetic direction of the intermediate layer of the Halbach array bearing of the prior application Halbach is in the same direction as the axial direction of the turbine shaft

The plane forms a right-angle sectional structural schematic diagram.

FIG. 8 is a schematic cross-sectional view of the yoke made of the materials of the turbine shaft and the head housing of the prior application.

FIG. 9 prior application Halbach array bearing interlayer magnetic orientation and turbine shaft axial orientation are in the same

Plane parallel section structure diagram.

FIGS. 10-15 are sectional views of prior applications of the turbine blade of FIGS. 4-9 in which the turbine blade is a Halbach array magnet turbine

Schematic diagram.

Fig. 16 is a schematic sectional structure of the prior application 2.

Fig. 17 is another schematic sectional structure of the prior application 2.

Fig. 18 is a bottom view of the conductive ring of the prior application 2.

Fig. 19 is a schematic cross-sectional view of the conductive ring of the prior application 2.

FIG. 20 is a schematic view of a radial array of conductors according to the present invention.

FIG. 21 is a schematic view of a radial vortex radial arrangement of the conductors of the present invention.

Detailed Description

Fig. 16 is a dental turbine hand drill, which comprises a handpiece shell 1 and a movement, wherein the handpiece shell 1 is provided with a needle jack, the movement comprises a turbine and a turbine shaft 3, an LED lamp 4 is arranged outside the needle jack and surrounds the turbine shaft, and the LED lamp 4 is connected with a power supply arranged in the handpiece shell; the power supply is a micro generator, and the micro generator is as follows: the turbine in the machine head shell is a magnet turbine 21 with the magnetic direction parallel to the turbine shaft 3, the outer side of one end or two ends of the magnet turbine 21 is provided with a conductive circular ring piece 5, the conductive circular ring piece 5 is fixed in the machine head shell 1, and the magnetic line of force at the end part of the magnet turbine 21 passes through the conductive circular ring 5; the inner side and the outer side along the radial direction of the conductive ring piece 5 are correspondingly electrically connected with the anode and the cathode of the LED lamp. During ventilation, the turbine rotates about 30 thousands of revolutions per minute, the magnetic force line conductive ring piece 5 at one end or two ends of the magnet turbine 21 generates electricity, and current flows through the LED lamp to emit light; when the LED lamp works to grind teeth, the turbine rotates about hundreds of thousands of revolutions per minute, and power can be generated to enable the LED lamp to emit light.

As shown in fig. 16, the head housing 1 and the turbine shaft 3 are made of soft magnetic material, and the head housing 1 and the turbine shaft 3 are marked with magnetic directions. The magnetic field thus contributes to the formation of a loop, increasing the magnetic flux of the conductive segment 5. It is also possible that one of the housing 1 and the turbine shaft 3 is a soft magnetic material, except that the magnetic flux of the conductive segment 5 is correspondingly reduced.

As shown in fig. 17, the head housing 1 and the turbine shaft 3 are made of a non-soft magnetic material; the conductive circular ring piece 5 is externally provided with a soft magnetic material ring 58, and the conductive circular ring piece 5 is arranged between the magnet turbine 21 and the soft magnetic material ring 58. Soft magnetic materials include soft iron, mild steel and other alloys that are easily magnetized in a magnetic field and demagnetized immediately after leaving the field, and the rings of soft magnetic material function to attract more magnetic lines of force through the conductive segments.

As shown in fig. 17, the soft magnetic material ring 58 is a bearing sleeved on the turbine shaft 3 or the soft magnetic material ring 58 is sleeved outside the bearing. The soft magnetic material ring can be a soft magnetic material bearing, or the parts of the bearing are made of soft magnetic materials, particularly the outer ring of the bearing is made of soft magnetic materials, and the outer ring of the soft magnetic materials of the bearing can be thickened so as to attract more magnetic lines of force to penetrate through the conductive circular ring pieces.

As shown in fig. 20, the conductive ring piece 5 is a printed disc winding 50, conductors a501 formed by thin copper sheets in the printed disc winding 50 are radially arranged, and each conductor a501 cuts magnetic lines of force and is equivalent to an ultramicro generator. Thus, the printed disc winding 50 does not rotate, the magnet turbine rotates at a high speed, and each conductor 501 cuts magnetic lines of force and is equivalent to an ultramicro generator, namely a faraday generator which is equivalent to a part of a rotating disc. When generating electricity, radial gaps are formed among the conductors, and the induced stress of the conductors to the magnet turbine is interrupted, so that the turbine is easy to vibrate. The radial winding can be provided as a separate product.

Conductors B502 formed from thin copper sheets in the printed disc winding 50 are arranged radially in a radially spiraling radial pattern as illustrated in fig. 21. Because the conductors B502 are arranged radially in a vortex manner, and the gaps between the conductors B502 also rotate radially in a vortex manner, when power is generated, the conductors and the gaps are always arranged radially, the inductive stress of the conductors on the magnet turbine is uninterrupted, and the turbine vibration cannot be caused. The spiral radial winding can be provided as a separate product.

The conductor A501 and the conductor B502 form a serial connection between the ultramicro generators. Because the led lamp needs a small current of 5-20mA and a large voltage of 1.5-3V, the serial connection can superpose the voltages of each ultramicro generator to form a high voltage. The area of the connecting wire cutting the magnetic force line is far smaller than the area of the conductor of the winding cutting the magnetic force line.

The printed disc winding 50 of the above embodiment may be disposed on the lower side, the upper side, or both the upper and lower sides.

As shown in fig. 19, the conductive ring pieces 5 are at least two layers insulated from each other, the conductive ring pieces 5 are connected in series along the current direction, and the conductive ring pieces 5 are three layers in the figure, and include a first layer of conductive ring piece 51, a first layer of insulating material 511, a second layer of conductive ring piece 52, a second layer of insulating material 521, a third layer of conductive ring piece 53, and a third layer of insulating material 531 in sequence from top to bottom. Due to the high rotating speed, the diameter of the conductive circular ring piece 5 is small, the voltage generated by single pieces is small, and the single pieces can only be connected in series after being laminated so as to increase the voltage.

The conductive ring pieces are connected in series along the current direction, namely the inner side surface of the first layer of conductive ring piece 51 along the radial direction is electrically connected with the outer side surface of the adjacent second layer of conductive ring piece 52, the inner side surface of the second layer of conductive ring piece 52 is electrically connected with the outer side surface of the adjacent third layer of conductive ring piece 53, and the outer side surface of the first layer of conductive ring piece 51 and the inner side surface of the third layer of conductive ring piece 53 are electrically connected with the corresponding positive and negative electrodes of.

The inner side surface of the first layer of conductive ring piece 51 is electrically connected with the outer side surface of the adjacent second layer of conductive ring piece 52, the inner side surface of the second layer of conductive ring piece 52 is electrically connected with the outer side surface of the adjacent third layer of conductive ring piece 53, and the connecting line is located between the two adjacent layers. Not shown in the figure, the first layer and the second layer and the third layer may be connected by a wire.

As shown in fig. 19, the inner side surface of the first layer of conductive ring piece 51 bypasses the third layer of conductive ring piece 53 downwards by the conducting wire 55, and then is connected to the outer side surface of the electrically connected adjacent second layer of conductive ring piece 52; as shown in fig. 19, the inner side of the second layer of conductive ring piece 52 on the left side of fig. 19 passes through the third layer of conductive ring piece 53 by the conducting wire 56, and then is connected to electrically connect the outer side of the adjacent third layer of conductive ring piece 53. Therefore, no connecting wire is arranged between the two layers of conductive ring pieces, the conductive ring pieces are closely insulated and overlapped, and the deformation of the conductive ring pieces caused by the inclusion of the connecting wire between the two layers is prevented.

The connecting lines that bypass the lowermost conductive segment are equally spaced along the ring as shown in fig. 18. This is done in order to make the induction force of the connecting leads 56 uniform.

The conductive circular ring piece is a conductive material film attached to the insulating material membrane. Such as membrane switch materials, etc.

The conductive ring piece and the soft magnetic material ring of the above embodiment are arranged on the lower side, and the conductive ring piece and the soft magnetic material ring can be arranged on the upper side or on the upper and lower sides separately or together.

As shown in fig. 1-15, a dental turbine hand drill comprises a handpiece shell 1 and a core, wherein the handpiece shell 1 is provided with a needle jack, the core comprises a turbine and a turbine shaft 3, an LED lamp 4 is arranged outside the needle jack and surrounds the turbine shaft, and the LED lamp 4 is connected with a power supply arranged in the handpiece shell; the power supply is a micro generator, and the micro generator is as follows: the turbine in the machine head shell is made of magnetic conductive materials, the outer sides of one end or two ends of the turbine 2 made of the magnetic conductive materials are provided with conductive circular ring pieces 5, the outer peripheries of the conductive circular ring pieces 5 are fixed in the machine head shell 1, or the conductive circular ring pieces and the machine head shell are of an integrated structure, the turbine shaft 3 penetrates through a center hole of the conductive circular ring pieces 5, and magnetic lines of force are arranged in the machine head shell and penetrate through the conductive circular ring pieces 5 and the magnetic field of the turbine 2 made of the magnetic conductive; the inner side and the outer side along the radial direction of the conductive ring piece 5 are correspondingly electrically connected with the anode and the cathode of the LED lamp.

The above is also an embodiment in which the conductive ring piece 5 is disposed on one side and the conductive ring piece 5 is disposed on both sides.

As shown in fig. 2, the magnetic field of the magnetic force lines arranged in the handpiece shell 1 and passing through the conductive ring piece 5 and the magnetic conductive material turbine 2 means that: the magnetic conductive material turbine is a magnet turbine 21 with the magnetic direction parallel to the turbine shaft 3, and magnetic lines of force at the end part of the magnet turbine 21 penetrate through the conductive circular ring piece 5.

The blades of the magnet turbine are stacked in the radial direction by three layers of magnets as shown in fig. 3, the three layers of magnets form a Halbach array, and the magnetic direction of the intermediate layer 231 of the Halbach array turbine is parallel to the turbine shaft 3, so that the Halbach array magnet turbine 23 is formed. Thus, the magnetic lines of force at the end of the magnet turbine are stronger and more concentrated.

As shown in fig. 4, the magnetic field of the magnetic force lines arranged in the handpiece shell 1 and passing through the conductive ring piece 5 and the magnetic conductive material turbine 2 means that: a conductive circular ring piece 5 is arranged below the magnetic conductive material turbine, a Halbach array magnetic ring 61 is arranged on the lower side of the conductive circular ring piece 5, the conductive circular ring piece 5 is arranged between the magnetic conductive material turbine 2 and the Halbach array magnetic ring 61, the Halbach array magnetic ring 61 is a Halbach array formed by overlapping three layers of circular ring magnets along the radial direction, and the magnetic direction of the middle layer 611 of the Halbach array magnetic ring is parallel to the turbine shaft 3. For example, as shown in fig. 5, the upper side and the lower side of the magnetic conductive material turbine are respectively provided with a conductive circular ring piece 5, the upper side and the lower side of the conductive circular ring piece 5 are respectively provided with a Halbach array magnetic ring 61, the conductive circular ring piece 5 is arranged between the magnetic conductive material turbine 2 and the Halbach array magnetic ring 61, and the other steps are similar to those shown in fig. 4, the Halbach array not only concentrates magnetic lines of force, but also strengthens the magnetic field along the axial direction.

As shown in fig. 6-15, Halbach array bearings 7 are arranged at two ends of the turbine shaft 3, one end of each Halbach array bearing 7 is a male three-layer Halbach array magnetic ring, and the corresponding end is a female three-layer sea

The negative surface and the positive surface of the Halbach array magnetic ring are mutually repulsive magnetic force; the conductive circular ring piece 5 is arranged between the magnetic conductive material turbine 2 and the Halbach array bearing 7, and magnetic lines of force of the Halbach array bearing 7 penetrate through the conductive circular ring piece 5.

As shown in fig. 6, the magnetic directions of the central layer 73 of the three-layer Halbach array magnetic ring 71 on the male surface and the central layer 73 of the three-layer Halbach array magnetic ring 72 on the female surface of the Halbach array shaft 7 on the female surface form an included angle with the axial direction of the turbine shaft 3 on the same plane, and the dense magnetic lines of force of the air gap between the female surface and the male surface are attracted by the turbine 2 made of magnetic conductive material and pass through the conductive circular ring piece 5.

As shown in fig. 7, the magnetic direction of the middle layer 73 of the three-layer Halbach array magnetic ring 71 on the male surface and the middle layer 73 of the three-layer Halbach array magnetic ring 72 on the female surface of the Halbach array shaft 7 on the female surface and the axial direction of the turbine shaft 3 form a right angle, and the dense magnetic lines of force of the air gap between the female surface and the male surface are attracted by the turbine 2 made of magnetic conductive material and pass through the conductive circular ring piece 5.

As shown in fig. 8, the material of the turbine shaft 3 and the head housing 1 is a yoke, and the arrows of the turbine shaft 3 and the head housing 1 indicate the magnetic directions in the turbine shaft 3 and the head housing 1.

As shown in fig. 9, the magnetic directions of the middle layer 73 of the male three-layer Halbach array magnetic ring 71 and the female three-layer Halbach array magnetic ring 72 of the Halbach array bearing 7 are parallel to the axial direction of the turbine shaft 3 in the same plane, and the end surface of the Halbach array bearing 7 adjacent to the magnetic conductive material turbine 2 emits light

The magnetic lines of force of which are attracted by the turbine 2 of magnetically conductive material through the conductive segments 5.

The material of the magnetic conductive material turbine 2 is yoke iron or magnet as shown in fig. 4-9, and the material of the magnetic conductive material turbine 2 is one of Halbach array magnet turbines as shown in fig. 10-15. The yoke iron, the magnet or the Halbach array magnet turbine guides magnetic lines to penetrate through the conductive circular ring piece 5, and the yoke iron is made of materials combining the turbine shaft 3 and the machine head shell 1, so that the magnetic lines penetrating through the conductive circular ring piece 5 can form a loop.

All features disclosed in this specification may be combined in any combination, except features that are mutually exclusive. Any feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A dental turbine handheld drill comprises a machine head shell and a machine core, wherein the machine head shell is provided with a machine needle jack, the machine core comprises a turbine and a turbine shaft, an LED lamp is arranged outside the machine needle jack in a surrounding mode around the turbine shaft, and the LED lamp is connected with a power supply arranged in the machine head shell; the method is characterized in that: the power supply is a micro generator, and the micro generator is as follows: the turbine in the machine head shell is a magnet turbine with the magnetic direction parallel to the turbine shaft, the outer sides of one end or two ends of the magnet turbine are conductive circular ring pieces, the conductive circular ring pieces are printed disc windings, conductors formed by thin copper sheets in the printed disc windings are arranged in a radial vortex radial mode, each conductor cuts magnetic lines of force and is equivalent to an ultramicro generator, the ultramicro generators are connected in series, the conductive circular ring pieces are fixed in the machine head shell, and the magnetic lines of force at the end part of the magnet turbine penetrate through the conductive circular ring pieces; the inner side and the outer side along the radial direction of the conductive ring piece are correspondingly and electrically connected with the anode and the cathode of the LED lamp.

2. The dental turbine hand drill of claim 1, wherein: the machine head shell and the turbine shaft are made of soft magnetic materials.

3. The dental turbine hand drill of claim 1, wherein: the machine head shell and the turbine shaft are made of non-soft magnetic materials; the conductive circular ring piece is externally provided with a soft magnetic material ring, and the conductive circular ring piece is arranged between the magnet turbine and the soft magnetic material ring.

4. The dental turbine hand drill of claim 3, wherein: the soft magnetic material ring is a bearing sleeved on the turbine shaft.