CN1867300A

CN1867300A - Dental handpiece with a body formed from a single piece and comprising an electronic and elastic element for connection between the mechanical transmission elements and the head of the instrument

Info

Publication number: CN1867300A
Application number: CNA2004800301569A
Authority: CN
Inventors: J·佩尔诺; 让-克洛德·布瓦诺
Original assignee: Micro Mega International Manufactures SA
Current assignee: Micro Mega International Manufactures SA
Priority date: 2003-11-25
Filing date: 2004-09-23
Publication date: 2006-11-22
Anticipated expiration: 2024-09-23
Also published as: FR2864441A1; CN1867300B; FR2864441B1

Abstract

The invention relates to a dental handpiece (1) comprising mechanical elements, i.e. a tool holder unit for fixing and rotationally driving a dental instrument about a drive axis (6) and a movement transmission unit. The mechanical elements are mounted inside the body (2) with a head (4) and a handle (3). The invention is characterized in that it comprises means for electric connection between the mechanical elements of the handle and the head of the instrument. Said means are made up of an elastic and electrically conducting connecting element.

Description

Dental handpiece with monomer spare formula main body---it has and be furnished with elasticity electrical connection parts between the mechanical transmission elements of apparatus and its head

Technical field

[01] the present invention relates to the novel dental handpiece.

Background technology

[02] general known dental handpiece has two types, promptly straight handpiece and elbow (contre-angle) formula handpiece.

[03] if the elbow type handpiece, then main body is made of a handle, and described handle has a crank throw portion and a head.

[04] this structure causes an embodiment, and this embodiment requires main body to adopt at least two members, three members often so that internals can be assembled together, and this embodiment also require to adopt a plurality of, be three bearing at least.

[05] obvious, this design can not make cost greatly reduce.

Summary of the invention

[06] the present invention at first is intended to propose a kind of new structure notion of handpiece, the notion that its alternative handpiece is present, and for mechanically driver type handpiece or air turbine drive-type handpiece, it can make main body be implemented as a monomer spare.

[07] this purpose is achieved by the present invention, wherein the present invention proposes a kind of dental handpiece, described handpiece has mechanical parts, especially a clamp assembly and a transmission component, described clamp assembly wherein is used for rotation is fixed and driven to a dental instruments around a driving shaft, described mechanical parts are installed in the body interior with a head and a handle, it is characterized in that, main body is that housing forms by a monomer spare, its part is as handle, and another part constitutes a head, head has one first inner chamber, described first inner chamber is connected with at least one opening, and described opening size is arranged to allow the parts with head to insert and assemble within it, and handle has one second vertical inner chamber, described second vertical inner chamber has straight axle, lead to pommel by an opening on the one hand, and lead to first inner chamber by a side opening on the other hand, described opening size is arranged so that the internal works insertion of handle and assembles within it.

[08] implements modification according to one, handpiece has the electrical connector that is made of a mechanical transmission elements chain that rotatablely moves, thereby guarantee that from a wiring until the electric energy of apparatus and the transmission of motion, described wiring wherein is arranged in pommel, to match with an external motors.

[09] according to another modification, it has the electrical connector that is made of a lead.

[10] according to another modification, it has an elasticity and connects parts, to be used to guarantee the electrical connection between mechanical transmission elements and the utensil head.

[11] according to another modification, head is equipped with a turbine, and the main body of handpiece has the needed fluid slot of work.

[12] preferably, the inner chamber of head is suitable for admitting a clamp assembly of being made up of the mechanical transmission elements of head, and be suitable for admitting a fastening-unlocking element of utensil or apparatus, described inner chamber leads on the head by an opening, described opening can by one the plug or one the lid or by a press button obturation.

[13] preferably, handpiece has a fixture, this fixture is fixed on a dental instruments on one clamp assembly, so that a dental instrument or apparatus are fixed and rotating drive around a driving shaft, described clamp assembly is integrated on the head of a dental handpiece, and be connected with a transmission component that is integrated in the handle of described handpiece, and mainly by the elasticity of a band-like body form and deformable fastening-unlocking element forms, described fastening-at least a portion of unlocking element has a cross section, this cross section is suitable for being bonded on one and is arranged in the cervical region or cannelure on apparatus top, and be suitable for maintaining described apparatus by fastening instrument, described fastening-unlocking element also has the member that is used to apply the power of unclamping, so that the cancellation fastening force, thereby unclamp apparatus.

[14] preferably, described fixture is dismountable with respect to anchor clamps.

[15] according to a modification, the band-like body made from deformable and elastic material has the shape of parallelogram basically, and has a middle section, this middle section to be provided for head at a groove place fastening instrument.

[16] according to another modification, deformable and elastic band-like body have the shape of a split ring or an open annular jaw, this split ring or open annular jaw have an annular convex shoulder, this convex shoulder is suitable for being bonded in the annular neck portion of apparatus, and have a tapering part, this tapering part is used for matching with a taper complementary portion of a press button.

[17] according to the operation of utensil and/or the modification of operating rate, fixture can have a press button, described press button with or be not connected with anchor clamps, and can for example remain in the opening of head by clamping.

Description of drawings

[18] with reference to the non restrictive description of hereinafter carrying out in conjunction with the accompanying drawings, the present invention will be better understood.Accompanying drawing is as follows:

[19] Fig. 1 is the three-dimensional total figure according to handpiece of the present invention;

[20] Fig. 2 is the longitudinal sectional drawing of handpiece shown in Figure 1;

[21] Fig. 3 is the local longitudinal sectional drawing of the present invention's one non-limiting example;

[22] Fig. 4 is the partial perspective view of another non-limiting example, and this embodiment has the fastening-unlocking element of elastic belt-shaped form of a rhombus that can manually unclamp;

[23] Fig. 5 is the axial section of Fig. 4;

[24] the partial lateral profile that Fig. 6 is a head shown in Figure 4---it is implemented in elastic belt-shaped and locates---;

[25] Fig. 7 is the part section axonometric chart of head shown in Figure 4;

[26] Fig. 8 is the axial section of another non-limiting example, and this embodiment has the fastening-unlocking element of an elastic belt-shaped form can unclamping by the effect of a button;

[27] Fig. 9 is a part section axonometric chart embodiment illustrated in fig. 8;

[28] Figure 10 is elastic belt-shaped a axonometric chart shown in Fig. 8 and 9;

[29] Figure 11 is the axial section of another non-limiting example, and this embodiment has a fastening-unlocking element that is the split ring shape;

[30] Figure 12 and 13 is axonometric charts of press button shown in Figure 11;

[31] Figure 14 and 15 is axonometric charts of the fastening-unlocking element of the form that is split ring-jaw shown in Figure 11;

[32] Figure 16 is the axonometric chart of press button shown in Figure 3;

[33] Figure 17 illustrates a modification embodiment illustrated in fig. 3, and it has an elastic conduction and connects parts.

The specific embodiment

[34] general concept of handpiece main body

[35] at first referring to figs. 1 through the non-limiting example shown in 3.

[36] handpiece 1 according to the present invention is made of a monomer spare formula main body 2, it comprises one as the part of handle 3 and the part of a formation one head 4, described handle 3 has straight axle, described head 4 is used for fixing and drive an apparatus 5 along a driving shaft 6, described driving shaft 6 can align with the axle 7 of handle, or can form a predetermined angular with it, and this angle is between 90 ° to 180 °, and preferably between 100 ° to 130 °, as shown in drawings shown in the non-limiting example.

[37] main body is formed by the housing or the shell 8 of integral body or non-integral, it can be electric insulation, and can for example make with thermoplasticity or heat cured polymeric material (preferably using polyethers-ether ketone (hereinafter being abbreviated as PEEK)), in the mechanical component and the electrical connector of handle and head are housed, thereby guarantee from wiring 9 until the electric energy that is fixed on the apparatus 5 on the head 4 and the transmission of motion, described wiring 9 wherein is arranged in pommel, matches with an external motors (not shown) being used for.

[38] elbow piece 1 according to the present invention shown in Fig. 1 to 3 has diaxon 6 and 7, and described axle can limit the friction risk of each bearing, and like this so that guarantee the stable efficient of trying one's best, therefore, in this case, ball bearing is housed also in the housing 8.This layout of elbow piece is particularly suitable for carrying out the sick treatment of dental pulp (canalaire) (tooth internal medicine) with peak value (apex) detector.

Therefore [39] therefore, what connect with a motor for example can make an apparatus 5 (for example slot type apparatus) produce rotation according to handpiece of the present invention, and even thus can transmission current, utilize this electric current can carry out peak detection.Electrical connection between motor and the handpiece (seeing Fig. 2 and 3) can connect an any connector (or for example by flexible button) that connects between the cervical region 10 that refers to a bar and a jack 11 by one of for example motor and carry out.Insulating housing 8 is kept by the dentist, and the end of its head 4 sides is a surrounding with the patient oral cavity.In this configuration, machinery is constructed as follows in handle with fax motivation part chain: electric current leads to an external collar of a clutch shaft bearing 12 from jack 11, and lead to one first spring 13, an external stability collar that leads to one second bearing 14 that continues, lead to a collar 15 then, lead to a spring 16 again by one second convex shoulder axial locking of housing 8 by one first convex shoulder axial locking on the housing 8.

[40] first and

second bearings

12,14 are first supporting one power transmission shaft of handpiece 1 along the longitudinal axis 7 of handle, and

spring

13 and 16 is compression springs, and its spiral coil externally is arranged on the power transmission shaft 7.

[41] in this stage, therefore electric current passes the shank that elbow piece is a handpiece 1.

[42] as modification, can consider a lead, draw its end from motor-side, until contacting with apparatus or utensil 5.

[43] to have its second be driving shaft 6 to the head 4 of elbow piece, it supports two ball bearings (if possible, be the inclination contact), i.e. a upper bearing (metal) 17 and a lower bearing 18, the external collar of described upper bearing (metal) 17 matches with second spring 16 of handle, and the end play of described lower bearing 18 is eliminated by means of an elastic washer 19.

[44] owing to this installation of bearing, the ball of bearing contacts with the interior outer sleeve of bearing all the time, thereby guarantees the electrical connection between standing part and the movable part.

[45] be installed in the gear that one on the driving shaft 6 is with the handle bar 20 have tooth 21, and described tooth is meshed with the tooth 22 of an output gear 23 of handle.

[46] gear 20 of band handle bar conducts electricity, and is connected with the inner sleeve of bearing, and it guarantees that power supply is to apparatus 5 and Mechanical Driven thereof.In view of housing 8 and a press button 55 (it will the be described in the back) exterior insulation that is arranged on the head 4, the electric current that is delivered to the apparatus end limits peak value by a resistance variations effect.

[47] as modification, the electrical connection between second bearing 14 and the head part of apparatus 40 connects parts 88 by an elastic conduction and is guaranteed, as previously mentioned, the Mechanical Driven of apparatus is guaranteed by the gear 20 of band handle bar.

[48] described connection parts 88 for example are the bars that a thin plate or has circle or square-section, and have one first peripheral part 89 and one second peripheral part 91, described first peripheral part wherein is bonded in the groove 90 that is implemented in bearing 14 collars 15, and described second peripheral part is positioned at on the relative end of first peripheral part, it is bearing on the head part of apparatus 40, described connection parts when press button is not worked by means of groove 90 be held perpendicular to described apparatus the axle.

[49] this modification advantageous particularly, on the one hand because pressing button switch 55 promptly can promote head part of apparatus 40, and because connect parts the contact on the head 40 centers axle at apparatus by means of the spherical surface of described head on, thus, friction velocity is near zero on the other hand.

[50] notion of the fixture of apparatus and fastening-unlocking element in the head

[51] non-limitative preferred embodiment of the fastening and back-off assembly of the fixture of apparatus in the head 4 and apparatus is described now.

[52] for example when pulpal treatment,, be the assurance of comfortableness and quality to the accessibility of molar for dentist and patient.Therefore, the applicant is intended to propose a clamp assembly 24, and it is made up of the head mechanical transmission elements, and volume is as far as possible little, structure is compact as far as possible.

[53] it realizes its purpose by design with lower member:

[54]-one compact conformation, the little novel fastening-unlocking element 25 of volume, it is the ingredient of a fixation kit, and form by elasticity and deformable band-like body 25 that usefulness plastics (for example PEEK) or non-plastics are made, guarantee fastening and release function individually, unclamp by the proficiency trend heart action on band-like body and undertaken, and fasteningly undertaken by discharging this action

[55]-and a inner chamber 26 in the head, it is suitable for admitting clamp assembly 24 and fastening-unlocking element 25 thereof, and described inner chamber leads on the head by an opening 27, and described opening 27 can be by a plug or a lid 28 or by a press button obturation.

[56] understand following two embodiment, can understand this solution better.

[57] at first, describe first embodiment shown in Fig. 4 to 7, wherein, unclamp by the moving action of the catcher always on band-like body and controlled.

[58] along the inner chamber 26 of clamp assembly 24, have on the one hand one with driving shaft 6 co-axial cylindricality bottoms 29, and the diameter of described cylindricality bottom is suitable for admitting the handle bar 30 of the gear 20 of being with the handle bar, and have on the other hand one also with the driving shaft 6 co-axial tops 31 that are cylindricality basically, described upper diameter is bigger, is used to admit the tooth portion 21 of gear of the band handle bar with apparatus STATEMENT OF FEDERALLY SPONSORED and fastening-back-off assembly that the back will be described thereof.

[59] the spacious logical opening 27 on inner chamber top 31 is by a plug or cover 28 sealings, described plug or cover 28 preferably but not necessarily use with housing 8 identical materials and make.

[60] inner chamber top 31 also has a side opening 32, and it leads in the inner chamber 33 of handle 3, so that the tooth portion of the gear 20 of band handle bar is meshed with the tooth portion of the output gear 23 of handle 3.

[61] gear of band handle bar freely rotates in head, and its axial stability is guaranteed between the bottom 34 on the inner chamber top of formation one convex shoulder and the front 35 of filling on the other hand on the one hand.The axial freedom that is produced by the gear of described band handle bar is a few percent millimeter.

[62] rotatablely moving of output gear 23 is delivered to the gear 20 of band handle bar, is delivered to apparatus 5 by means of a flat pieces 36 that is arranged on the apparatus then, and described flat pieces 36 matches with a flat pieces 37 in being arranged in the bore 38 of being with the handle bar.

[63] according to this embodiment shown in Fig. 4 to 7, fastening-unlocking element mainly is made up of a band-like body 25, described band-like body is made with a deformable and elastic material, its shape assumes diamond in shape basically, and having a middle section 39, this middle section is used for the head 40 at the annular locking slot 41 place's fastening instruments that are arranged in the apparatus upper end.

[64] the big diagonal of rhombogen is arranged to: its two ends exceed the housing of head 4 by two lobe 42 on diameter, described each lobe 42 is arranged in the groove 43 of head, each groove 43 leads to the top 31 of inner chamber on the one hand, leads to the opening 27 of admitting plug on the other hand.

[65] on two lobe 42, implement simultaneously to take over the trend heart action always, then unclamp apparatus, and discharge described action and then guarantee the fastening of described apparatus.

[66] groove profile 44 is guaranteed the rotation lock of band-like body, and described band-like body centers in head by concave part 45, and described concave part is arranged near the lobe 42 and rests on the periphery 46 on inner chamber 26 tops.

[67] axial stability of band-like body is guaranteed by a convex shoulder 47 on the one hand, is guaranteed by the bottom 50 of groove on the other hand, and described convex shoulder 47 wherein is arranged in the bottom 48 of an axial chamber 49 that is used to admit head part of apparatus 40 of plug.

[68] like this, the band-like body rotating part of the gear of contact zones handle bar not.

[69] in free state, the cannelure of described band-like body and head part of apparatus one on convex shoulder 51 match, to carry out first axial restraint of described apparatus, another axial restraint guarantees that by a flat pieces 52 of the gear of band handle bar described flat pieces 52 matches with the lateral ends 53 of apparatus flat pieces.

[70] release of apparatus is: apply two kinds of antipodal pushing, the described sensing rotating shaft of pushing in projection 42.These two kinds of power produce an orthogonal component, thereby release out apparatus.Directly push simultaneously two ears (for example using thumb and forefinger) of band-like body, for example guarantee fastening in the oral cavity with respect to the press button system.Owing to arrange that a tapering part 64---it is implemented in the lower surface of band-like body middle section 39, two ears that need not to push band-like body also can connect apparatus, moving axially of apparatus showed band-like body by moving radially that elastic reaction carries out, and band-like body recovers its shape to guarantee fastening effect.

[71] present second embodiment that describes fastening-back-off assembly in conjunction with Fig. 8 to 10.

[72] have elastic belt-shaped 25 of middle section 39 that a diamond shape and is used for fastening instrument, be its ear 54 with the difference of last embodiment, described ear forms protuberance, perpendicular to the plane of described band-like body and be positioned at this planar the same side, its difference also is, this elastic belt-shaped the gear by band handle bar upwards kept in axial and footpath, shown in Fig. 8 to 9.

[73] for this reason:

[74]-and the both ends of band-like body pass two periphery holes 61, and described two periphery holes are arranged on the upper flange 62 of gear of band handle bar, and are opposed fully, and arrange transverse to the plane of driving shaft 6 along one,

[75]-two ear 54 carries out twist-lock by two grooves 63 of described flange.

[76] in addition, the difference of head and last embodiment is that plug replaces one and has for example press button 55 of metal insert (for ease of making).

[77] according to this embodiment, for example the press button made from PEEK has a plurality of parts:

[78]-one elastic ring 56, and it is positioned at the lower end, the axial freedom of the gear of check strap handle bar, and press button remained on the head 4,

[79]-one Hookean region 57 in the middle of, it plays the back-moving spring of described press button,

[80]-one insert 58 in the cylindricality, it can control described elastic belt-shaped distortion when pushing described press button, thereby release out described utensil, for this reason, 55 on pressing button switch is its spring 57 compressions, and the inner taper 59 of insert 58 is matched with the complementary tapered portion 60 of band-like body ear.The radial component that produces on the ear 54 of band-like body causes another radial deformation perpendicular to described elementary component.But this distortion release apparatus.

[81] apparatus is inserted in the head and can be undertaken by the pressing button switch, also can not push press button and carry out, under latter event, the tapering part 64 on the lower surface of band-like body middle section 39 allows to insert apparatus.

Centrifugal action when [82] configuration of band-like body helps to guarantee by rotation is carried out fastening.

[83] press button notion

[84] miniaturization is for example continuous target of pursuing of dental elbow type head of medical instruments field.New material for example thermoplasticity or heat cured polymeric material satisfies this expectation.Known parts can rethink according to machinery, physics and the chemical characteristic of these new materials, and can reduce the quantity of assembly like this, improve the quality, and reduce the cost of assembly; But these plastic member machineds or injection form.Obviously, for dynamic apparatus, therefore these plastics also have portability, sliding capability, good sterilization or disinfecting properties, better elastic characteristic except that miniaturization.Therefore, these plastics can be used for making dental handpiece.Utensil tighten or loosen control, generally by on the press button of handpiece head, applying action on the other hand with carrying out.According to design, this press button can device be connected, and it is the peg button formula switch that is independent of dynamic apparatus with dynamic (rotation, the vibration etc..) that for example are used for pulpal treatment.

[85] as embodiment, more than a handpiece head has been described, it has a dental drill tail end, shown in Fig. 2 and 3.

[86] draw attention to here: the main body of head 4 whole or that do not have handle 3 is admitted a band handle bar gear 20 that rotates, and the gear of described band handle bar drives rotation by an output gear 23 of handle.Therefore, the gear of band handle bar has a rotational freedom and for example by one axially connecting that ball bearing is guaranteed.

[87] obvious, shown in Fig. 5 and 7, can consider the solution of free from ball bearing, adopt the smooth bearing of setting-in or the smooth bearing that lumps together with head body.

[88] transmission that rotatablely moves of dental drill is guaranteed by the joint of the flat pieces 37 of flat pieces 36 on the gear 4 that is implemented on band handle bar and utensil.The axial stability of utensil is guaranteed along a direction by the convex shoulder of the complementary flat pieces of the convex shoulder of the flat pieces of band handle bar gear and utensil.

[89] from this common description, can distinguish according to two kinds of press buttones of the present invention, that is:

[90]-one the press button that is connected with the dynamic apparatus that is called anchor clamps, it is as represented with label 55 in Fig. 3 and 16, and this solution is characterised in that the locking assembly of rotation and the permanent contact between the press button.In resting state, press button 55 (for example making with PEEK) is guaranteed axial restraint one elastic opening ring 65 (for example making with PEEK), and makes it to center with respect to axle 6.Ring 65 externally is cylindricality, and the upper flange 71, that its inwall has a tapered slope formula is the mid portion of horizontal convex shoulder 66 shapes towards axle 6.The convex shoulder 66 of elastic ring 65 in axial direction keeps apparatus 5 by being bonded in the annular neck portion 41.Press button 55 is led in the hole 38 of band handle bar gear by one or more sectors or parts 87 diametrically, described sector or parts 87 are arranged in the lower surface of button 55, and each ends at a tapered end, and this tapered end is used to be implemented in the supporting on the elastic ring 65.Moving axially between the top and bottom that are limited in one or more holes 68 of press button 55, described hole are implemented in the last main body of gear of band handle bar, and the one or more hook-like parts 67 that are arranged in the button lower surface cooperate in described hole.Elastic ring 65 applies an axial thrust load on press button 55, thereby makes it to return its initial position.Because its radial elastic that is caused by slit 69, hook-like part 67 can make press button be clamped in the described gear handle bar, and described slit wherein is arranged between hook-like part and the sector 87.Pressing button switch 55 can pass through tapering part 70 release utensils 5, thereby described tapering part wherein 70 engagement advances in the complementary tapered slope 71 of elastic ring to separate convex shoulder 66.Apparatus 5 is inserted in the gear of band handle bar, can carries out automatically by means of tapering part 73, and need not pressing button, described tapering part 73 wherein is arranged on the lower surface of elastic ring in convex shoulder 66 ends.

[91] as shown in Figure 3, fastening-unlocking element is an elastic ring that opens wide and have opening along the sagittal plane shown in Fig. 3 profile, and the member that is used to apply the power of unclamping is made of tapered slope 71.

[92] one are independent of the press button of dynamic assembly

[93] aspect utensil was held in place, this solution was characterised in that press button and latching member are isolating.

[94] this embodiment is shown in Figure 11 to 15 with way of example.

[95] in resting state, dynamic or non-dynamic following, and not to the press button effect, a taper elastic annular jaw 72 axially keeps utensil 5 by means of its arm 73 (for example 6 arms), and each described arm 73 ends at a convex shoulder 79 towards axle 6.Jaw 72 is bonded in the respective openings 76 that is implemented on the band handle bar gear by the peripheral projection portion 74 of described jaw, and is connected with the gear of the band handle bar that rotates.One slit 77 of running through jaw fully makes jaw have necessary radial elastic, dismantles from the hole thereby jaw can be installed in the hole of gear of band handle bar and with jaw.

[96] press button 55 axially keeps and centers in the opening 27 of head by cover the flexure strip 75 that forms of cutting at it; The flexure strip that these are installed under pressure in the head body, provide press button the axial elasticity degree of freedom (along the axle 6).Figure 12 and 13 illustrates the described flexure strip 75 that is in stress state, and the holding tank 80 that the flexure strip end is used for button 55 is clamped in opening 27 is shown.Proficiency moving axis on press button is to promotion, reacts for one of the taper base portion 78 of press button moves axially, thereby matches with the complementary cone 82 of the interior tapered chamber of jaw arm; Therefore, the release of utensil by described arm separately and the disengaging of convex shoulder 79 guaranteed.Remove and manually to push, press button recovers its initial position, and two members 55 no longer contact with 72 separately cones.

[97] according to this solution shown in Figure 11 to 15, fastening-unlocking element is an elastic cone jaw 72, the convex shoulder 79 of described jaw is suitable for being bonded in the groove or annular neck portion 28 of apparatus, and the member that is used to apply the power of unclamping is made of the inner taper 82 of described jaw 72, and the radial deformation of wherein said jaw is guaranteed by slit 77.

[98] lubricated notion

[99] Fig. 8 is the axial section of Fig. 9, it illustrates head and has a chamber 83, its next door is arranged or be arranged in to described chamber around the handle bar of described band handle bar gear, for use in adorning a solid lubrication fat, during each the use, this solid lubrication fat disengages slightly by a hole 84 of the partition wall 85 between chamber and the gear handle bar, with lubricated described handle bar.

[100] notion is installed

[101]-housing 8 can thereby be the material (for example PEEK) of electric insulation or have metallic inclusion (for example by the metal injection method of molding---write a Chinese character in simplified form M.I.M) and sintered material or any other material of conduction are molded as a monomer spare formula with plastics.This housing has:

[102]-in head, it has one first inner chamber 26, described first inner chamber 26 is used for along a driving shaft 6 anchor clamps and an apparatus being installed, described inner chamber leads to the head both sides along two openings, wherein at least one opening is that opening 27 has size, described size is suitable for allowing all parts of head to insert and assembling

[103]-in described handle, it has one second inner chamber 33, described second inner chamber has straight axle 7, lead to the far-end of handle on the one hand by an opening 81, lead in first inner chamber 26 by a side opening 32 at the head near-end on the other hand, make to cooperate between the mechanical parts of the mechanical parts of head and handle.In addition, opening 81 is sized to: be suitable for making all parts of handle to insert and install within it along a straight axle 7 that is called arbor.For forming an elbow piece, be provided with a housing, it 6 and 9 for example forms one between 90 ° to 180 °, the preferred angle between 100 ° to 130 °, and for forming handpiece always, it is parallel to each other and stagger to be designed to axle 6 and 7, so that keep an opening 27 of head, to be used to assemble a plug of internals and installation in position one press button.

[104] this notion advantageous particularly because it can:

[105]-reduce number of bearings, even the cancellation bearing,

[106]-reduce the cost of handpiece,

[107]-reduce the size of handpiece,

[108]-be convenient to clean (smooth form),

[109]-improve sanitary condition (monomer spare formula, thereby contactless face).

Claims

1. dental handpiece (1), it has mechanical parts, especially a clamp assembly and a transmission component, described clamp assembly wherein is used for a dental instruments fixing and driving rotation around a driving shaft (6), described mechanical parts are installed in the inside of the main body (2) with a head (4) and handle (3)

It is characterized in that, described main body (2) is that housing (8) forms by a monomer spare, its part is as described handle (3), and another part constitutes a head, described head has one first inner chamber (26), described first inner chamber is connected with at least one opening (27), described opening (27) is sized to allow the parts of described head to insert and assemble within it, described handle has one second vertical inner chamber (33), described second vertical inner chamber has straight axle (7), lead to pommel by an opening (81) on the one hand, lead to described first inner chamber by a side opening (32) on the other hand, described opening (81) is sized to make the internal works of described handle to insert and assemble within it.

2. dental handpiece according to claim 1 is characterized in that, the axle (7) of axle of described head (6) and described handle forms a predetermined angle between them, thereby makes an elbow piece.

3. dental handpiece according to claim 2 is characterized in that, α is between 100 ° to 130 °.

4. dental handpiece according to claim 1 is characterized in that, the axle (7) of axle of described head (6) and described handle is parallel to each other and stagger, so that make handpiece always.

5. according to each described dental handpiece in the claim 1 to 4, it is characterized in that described housing (8) forms by molded.

6. dental handpiece according to claim 5 is characterized in that, described housing (8) is made with polymeric material.

7. dental handpiece according to claim 6 is characterized in that, described housing (8) is preferably made with PEEK.

8. according to claim 6 or 7 described handpieces, it is characterized in that it has electrical connector, described electrical connector is made of a mechanical transmission elements chain that rotatablely moves.

9. handpiece according to claim 8 is characterized in that, described machinery and fax motivation part chain are constructed as follows:

One in described handle, electric current leads to an external stability collar of a clutch shaft bearing (12) from a jack (11), and lead to one first spring (13), an external stability collar that leads to one second bearing (14) that continues, lead to a collar (15) then by one first convex shoulder axial locking on the described housing (8), lead to a spring (16) again by one second convex shoulder axial locking of described housing (8), described first and second bearings (12,14) longitudinal axis (7) along described handle is first supporting one power transmission shaft of described handpiece (1), described spring (13 and 16) is the compression spring, its spiral coil externally is arranged on the described power transmission shaft (7)

In one the head (4) at described elbow piece, the gear (20) that is installed in the band of one on the described driving shaft (6) handle bar has tooth (21), described tooth is meshed with the tooth (22) of an output gear (23) of described handle, the gear (20) of described band handle bar conducts electricity, and be connected with the inner sleeve of described bearing, it guarantees that power supply is to described apparatus (5) and Mechanical Driven thereof, it is driving shaft (6) that described head wherein has its second, described axle supporting two ball bearings, i.e. a upper bearing (metal) (17) and a lower bearing (18): the external collar of described upper bearing (metal) (17) matches with second spring (16) of described handle, the end play of described lower bearing (18) is eliminated by means of an elastic washer (19)

10. according to claim 6 or 7 described handpieces, it is characterized in that described electrical connector is made of a lead.

11., it is characterized in that described electrical connector has an elasticity and connects parts (88) according to claim 6 or 7 described handpieces, with the electrical connection between the head that is used to guarantee described mechanical transmission elements and described utensil.

12. handpiece according to claim 11, it is characterized in that, described connection parts have one first peripheral part (89) and one second peripheral part (91), described first peripheral part (89) wherein is bonded in the groove (90), this groove is implemented in the collar (15) of described bearing (14), and described second peripheral part (91) is relative with described first peripheral part, and is bearing on the head (40) of described apparatus.

13. handpiece according to claim 5 is characterized in that, described housing is made with MIM class material.

14. according to each described handpiece in the claim 1 to 13, it is characterized in that, the inner chamber of described head (26) is suitable for admitting a clamp assembly of being made up of the mechanical transmission elements of described head, and be suitable for admitting a fastening-unlocking element (25) of described utensil or apparatus (5), described inner chamber leads on the described head by an opening (27), and described opening (27) can be by a plug or a lid (28) or by a press button obturation.

15. according to each described dental handpiece in the claim 1 to 14, it is characterized in that described head is equipped with a turbine, and the main body of described handpiece has the needed fluid slot of work.

16. according to each described dental handpiece in the claim 1 to 15, it is characterized in that, described head has a chamber that is used to accommodate a solid lubrication fat, during each the use, described solid lubrication fat is disengaged by the hole on the wall of separating described chamber and described gear handle bar, so that lubricated described handle bar.

17. according to each described dental handpiece in the claim 1 to 16, it is characterized in that, it has a fixture, described fixture is fixed on a dental instruments on one clamp assembly, so that a dental instrument or apparatus are fixed and rotating drive around a driving shaft (6), described clamp assembly (24) is integrated on the head (4) of a dental handpiece, and be connected with a transmission component that is integrated in the handle (3) of described handpiece (1), and mainly by the elasticity of a band-like body form and deformable fastening-unlocking element (25) forms, described fastening-at least a portion of unlocking element has a cross section, this cross section is suitable for being bonded on one and is arranged in the cervical region or cannelure on described apparatus top, and be suitable for maintaining described apparatus by fastening, described fastening-unlocking element also has the member that is used to apply the power of unclamping, so that the cancellation fastening force, thereby unclamp described apparatus.

18. dental handpiece according to claim 17 is characterized in that, described fixture is dismountable with respect to described anchor clamps (24).

19. according to claim 17 or 18 described dental handpieces, it is characterized in that, the band-like body made from deformable and elastic material (25) has the shape of parallelogram basically, and a middle section (39) arranged, this middle section is provided for the head (40) at the fastening described apparatus in a groove place, the big diagonal of described parallelogram body is designed to: its two ends exceed the housing of described head (4) by two lobe (42) on diameter, described each lobe is arranged in the groove (43) of described head, and described two lobe are configured for directly also manually applying the member of the power of unclamping on described band-like body.

20. dental handpiece according to claim 19 is characterized in that, described band-like body (25) has concave part (45), and described concave part is arranged near the lobe (42) and is bearing on the periphery (46) of an inner chamber (26) of described head.

21. dental handpiece according to claim 19, it is characterized in that, described elastic belt-shaped (25) that shape and with a parallelogram is used for the middle section (39) of fastening described apparatus have two ears (54), described ear forms lobe, perpendicular to the plane that is positioned at described band-like body and be positioned at this planar the same side, described two ears are configured for applying the member of the power of unclamping by being arranged in a press button on the described handpiece head.

22. dental handpiece according to claim 20 is characterized in that, described ear has tapered portion (60).

23., it is characterized in that described band-like body has a tapered portion (64) according to each described dental handpiece in the claim 19 to 22, described tapered portion is implemented in the lower surface of described middle section (39).

24. according to claim 21 and 22 described dental handpieces, it is characterized in that described fixture also has a press button, described press button is made up of a plurality of parts, that is:

-one elastic ring (56), it is positioned at the lower end, and described press button is remained on the described head (4),

Hookean region (57) in the middle of-one, it plays the back-moving spring of described press button,

Insert (58) in-one cylindricality, it can control described elastic belt-shaped distortion when pushing described press button, thereby releases out described utensil.

25., it is characterized in that described insert (58) has an inner conical shape (59) according to each described dental handpiece in the claim 22 to 24, match with the tapered portion (60) of the ear of described band-like body being used for.

26. according to claim 17 or 18 described dental handpieces, it is characterized in that, described deformable and elastic band-like body have the shape of a split ring (65) or an open annular jaw (72), this split ring or open annular jaw have an annular convex shoulder (66) (79), this convex shoulder is suitable for being bonded in the annular neck portion (28) of described apparatus, and have a tapering part (71), match with a complementary tapering part of a press button being used for.

27. dental handpiece according to claim 26 is characterized in that, described split ring has a tapering part (73), and described tapering part is arranged on the lower surface of described split ring, is used for the insertion of described apparatus.

28. dental handpiece according to claim 27, it is characterized in that, described fixture also has a press button (55), described press button is by axially channeling conduct of one or more sectors (87), and described sector is arranged in lower surface and each all ends at a tapered end (70).

29. dental handpiece according to claim 27, it is characterized in that, described fixture also has a press button (55), described press button has a flexure strip (75) and a taper base portion (78), and described flexure strip wherein covers cutting at it and forms and end at holding tank (80).

30. according to claim 17 or 18 described dental handpieces, it is characterized in that described fixture also has a press button, be used for described fastening-apply the power of unclamping on the unlocking element.

31. dental handpiece according to claim 30 is characterized in that, described press button is connected with described anchor clamps.

32., it is characterized in that described press button remains in the opening of described head by clamping according to claim 30 or 31 described dental handpieces.