FR2555042A1 - Thruster with cam - Google Patents
Thruster with cam Download PDFInfo
- Publication number
- FR2555042A1 FR2555042A1 FR8318778A FR8318778A FR2555042A1 FR 2555042 A1 FR2555042 A1 FR 2555042A1 FR 8318778 A FR8318778 A FR 8318778A FR 8318778 A FR8318778 A FR 8318778A FR 2555042 A1 FR2555042 A1 FR 2555042A1
- Authority
- FR
- France
- Prior art keywords
- tool
- lever
- conical
- bushing
- cam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 210000003813 thumb Anatomy 0.000 abstract description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
- A61C1/14—Tool-holders, i.e. operating tool holders, e.g. burr holders
- A61C1/141—Tool-holders, i.e. operating tool holders, e.g. burr holders in an angled handpiece
Abstract
Description
La présente invention concerne un dispositif pour la fixation des outils, tels que des fraises, sur une tête de contre angle classique, ce dispositif permettant la mise en place et le dégagement instantané de ces outils, au moyen d'éléments mécaniques exceptionnellement simples. The present invention relates to a device for fixing tools, such as milling cutters, on a conventional contra angle head, this device allowing the installation and instantaneous release of these tools, by means of exceptionally simple mechanical elements.
A cet effet, de façon connue, dans le dispositif selon l'invention, autour de la queue de l'outil est montée coaxialement une première douille présentant vers son extrémité inférieure un épanouissement d'allure générale conique, tandis qu'une seconde douille, enfilée par-dessus la première et fendue longitudinalement, présente dans la même zone un rétrécissement d'allure générale conique correspondante, de sorte que par enfoncement de la première dans la seconde, en opposition à un ressort à lame, l'outil est immobilisé par effet de coin, et inversement, quand on provoque le désengagement de la première d'avec la seconde, l'outil est libéré. To this end, in a known manner, in the device according to the invention, around the shank of the tool is mounted coaxially a first bushing having towards its lower end a development of generally conical shape, while a second bushing, threaded over the first and slit longitudinally, has in the same area a narrowing of general conical shape corresponding, so that by driving the first into the second, in opposition to a leaf spring, the tool is immobilized by wedge effect, and conversely, when the first is disengaged from the second, the tool is released.
Un tel mécanisme a déjà été décrit dans son principe, dans le brevet antérieur de la déposante FR 80 27642. Such a mechanism has already been described in principle, in the applicant's prior patent FR 80 27642.
La présente invention vise un perfectionnement à ce mécanisme, en permettant d'une part une manipulation plus aisée et d'autre part son adaptation universelle. The present invention aims at an improvement to this mechanism, by allowing on the one hand easier handling and on the other hand its universal adaptation.
En effet, le ressort à lame décrit ci-dessus présente une très grande rigidité, ce qui implique un effort important pour libérer l'outil. L'invention vise donc un moyen facilitant l'opération de libération de l'outil. Ce moyen consiste en un levier pivotant autour d'un axe horizontal monté dans la partie supérieure de la tête, et jouant le rôle d'une came exerçant un effort important sur le ressort, le comprimant ainsi aisément. Indeed, the leaf spring described above has a very high rigidity, which implies a significant effort to release the tool. The invention therefore relates to a means facilitating the tool release operation. This means consists of a lever pivoting around a horizontal axis mounted in the upper part of the head, and playing the role of a cam exerting a large force on the spring, thus compressing it easily.
Un tel système est applicable au montage et à la fixation de tous types d'outils de dentisterie dans une tête de manipulation.Such a system is applicable to the mounting and fixing of all types of dentistry tools in a handling head.
La figure unique du dessin représente en coupe axiale une tête équipée d'un dispositif de fixation d'outils selon l'inventison. The single figure of the drawing shows in axial section a head equipped with a tool fixing device according to the invention.
De la manière décrite dans le brevet précité de la déposante, la queue de l'outil 1 est fixée dans la tête par lten- semble des pièces se composant de la pince fendue 2, de la contrepièce conique 3, du ressort à lames 4 et de la butée 5. As described in the aforementioned patent of the applicant, the tail of the tool 1 is fixed in the head by a set of parts consisting of the split pliers 2, the conical counterpart 3, the leaf spring 4 and stopper 5.
La butée 5 et la pince fendue 2 sont solidaires et l'action du ressort 4 sur la butée 5 est de repousser cette dernière, c' est-à-dire en même temps la pince 2, donc à en di minuer le diamètre intérieur au niveau de l'ensemble cône-contre cône 6, formé par les rampes coniques que comportent à leur base respectivement la pince 2 et la contre-pince 3. Dans la position représentée qui est la position de serrage de l'outil 1, il subsiste un jeu fonctionnel désigné par 7 entre la partie supérieure de la butée 5 et un levier de déverrouillage désigné par la référence générale 8. Ce levier 8, monté pivotant autour d'un axe horizontal 10, présente une zone formant came désignée par la référence 12, et dont le pivotement par rapport à l'axe 10, détermine l'enfoncement de la butée 5. Le levier 8 est maintenu normalement en position fermée par un ressort de rappel 9.Le déverrouillage s'effectue en soulevant par l'arrière le levier 8 autour de l'axe 10, c'est-à-dire dans le sens de la flèche 11. The stop 5 and the split clamp 2 are integral and the action of the spring 4 on the stop 5 is to push the latter, that is to say at the same time the clamp 2, therefore to reduce the internal diameter at level of the cone-against-cone assembly 6, formed by the conical ramps which the clamp 2 and the counter-clamp respectively have at their base 3. In the position shown which is the clamping position of the tool 1, there remains a functional clearance designated by 7 between the upper part of the stop 5 and an unlocking lever designated by the general reference 8. This lever 8, mounted pivoting about a horizontal axis 10, has a cam forming area designated by the reference 12 , and whose pivoting relative to the axis 10, determines the depression of the stop 5. The lever 8 is normally maintained in the closed position by a return spring 9. The unlocking is carried out by lifting the rear lever 8 around the axis 10, that is to say in the direction of the arrow 11.
La came 12 vient alors au contact de la butée 5 en comprimant le ressort 4 de telle sorte que l'ensemble cône-contre cône 6 se trouve décoincé, en libérant la queue de l'outil 1. Le levier 8 demeure en position ouverte grâce au meplat désigné par 13, pratiqué en fin de sa course de relèvement.The cam 12 then comes into contact with the stop 5 by compressing the spring 4 so that the cone-against cone assembly 6 is loosened, releasing the tail of the tool 1. The lever 8 remains in the open position thanks the flat indicated by 13, practiced at the end of its bearing stroke.
il convient de bien noter que l'action de coin s' exer- çant entre les zones coniques des pièces 2 et 3, fait intervenir des efforts d'une telle importance qu' une simple poussée au moyen d'un bouton appuyant directement sur la butée 5 dans le sens axial serait insuffisante ou tout au moins exigerait un effort trop important, tandis qu'au contraire l'action du levier à excentrique 8 pivotant autour du pivot 10 permet de multiplier l'effort exercé dans le sens de la flèche 11 pour déverrouiller la pièce 1 avec un minimum d'effort de la part de l'opérateur. il convient d'ailleurs de noter que ce dernier peut aisément manoeuvrer le levier 8 tout en ne manipulant le contre-angle qu'en utilisant uniquement son pouce à cet effet it should be noted that the wedge action exerted between the conical zones of parts 2 and 3, involves efforts of such importance that a simple push by means of a button pressing directly on the stop 5 in the axial direction would be insufficient or at least would require too much effort, while on the contrary the action of the eccentric lever 8 pivoting around the pivot 10 makes it possible to multiply the effort exerted in the direction of the arrow 11 to unlock part 1 with a minimum of effort on the part of the operator. it should also be noted that the latter can easily maneuver the lever 8 while manipulating the contra-angle only by using only his thumb for this purpose
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8318778A FR2555042A1 (en) | 1983-11-23 | 1983-11-23 | Thruster with cam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8318778A FR2555042A1 (en) | 1983-11-23 | 1983-11-23 | Thruster with cam |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2555042A1 true FR2555042A1 (en) | 1985-05-24 |
Family
ID=9294495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8318778A Withdrawn FR2555042A1 (en) | 1983-11-23 | 1983-11-23 | Thruster with cam |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2555042A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0401987A2 (en) * | 1989-06-05 | 1990-12-12 | Midwest Dental Products Corporation | Dental handpiece |
FR2651671A1 (en) * | 1989-09-08 | 1991-03-15 | Micro Mega Sa | Device for clamping and unclamping the shank of a dental instrument |
US5040980A (en) * | 1989-06-05 | 1991-08-20 | Midwest Dental Products Corporation | Dental handpiece with spring grip chuck and lever release mechanism |
US6155826A (en) * | 1999-10-25 | 2000-12-05 | Howard; James | Grip chuck spindle assembly for a dental handpiece |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE660976C (en) * | 1938-06-07 | Alwin Berger Fa | Clamping device for tools in dental instruments | |
US3475817A (en) * | 1966-09-08 | 1969-11-04 | Kaltenbach & Voigt | Portable holder for dental tools or the like |
FR2496451A1 (en) * | 1980-12-22 | 1982-06-25 | Micro Mega Sa | Dental drill-bit securing mechanism - has ramp faces on clamping member and inside turbine rotor |
-
1983
- 1983-11-23 FR FR8318778A patent/FR2555042A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE660976C (en) * | 1938-06-07 | Alwin Berger Fa | Clamping device for tools in dental instruments | |
US3475817A (en) * | 1966-09-08 | 1969-11-04 | Kaltenbach & Voigt | Portable holder for dental tools or the like |
FR2496451A1 (en) * | 1980-12-22 | 1982-06-25 | Micro Mega Sa | Dental drill-bit securing mechanism - has ramp faces on clamping member and inside turbine rotor |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0401987A2 (en) * | 1989-06-05 | 1990-12-12 | Midwest Dental Products Corporation | Dental handpiece |
EP0401987A3 (en) * | 1989-06-05 | 1991-03-20 | Midwest Dental Products Corporation | Dental handpiece |
US5040980A (en) * | 1989-06-05 | 1991-08-20 | Midwest Dental Products Corporation | Dental handpiece with spring grip chuck and lever release mechanism |
FR2651671A1 (en) * | 1989-09-08 | 1991-03-15 | Micro Mega Sa | Device for clamping and unclamping the shank of a dental instrument |
US6155826A (en) * | 1999-10-25 | 2000-12-05 | Howard; James | Grip chuck spindle assembly for a dental handpiece |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2007260B1 (en) | Detachable grip device | |
EP1649957B1 (en) | Device for cutting and marking a metallic cable | |
EP0135490B1 (en) | Extractor with grips | |
FR2847180A1 (en) | TOOL HOLDER CHUCK WITH LOCKING SYSTEM | |
EP2796035A1 (en) | Hand-operated cutting tool | |
FR2897789A1 (en) | TOOL HOLDER CHUCK FOR THE EQUIPMENT OF A ROTATING MACHINE WITH RADIAL LOCKING AND AXIAL SEQUENCE MECHANISMS | |
FR2525296A1 (en) | Mounting for domestic tap - has semi-circular disc after passing through support orifice to hold tap in place | |
EP0571294B1 (en) | Pipe clamp provided with a screw | |
FR2555042A1 (en) | Thruster with cam | |
CH636797A5 (en) | DRILLING TOOL. | |
EP0216717B1 (en) | Clamping pliers with self-adjusting jaws | |
EP0706442A1 (en) | Tightening tool such as a screwdriver | |
EP1072735B1 (en) | Assistance device for laying panelling | |
FR2767730A1 (en) | Machine tool table vertical work piece clamp | |
FR2531895A1 (en) | TIGHTENING WRENCH | |
FR2499648A1 (en) | FIXING DEVICE FOR A GUIDE PIN OF A FLOATING CALIPER DISC BRAKE | |
FR2558088A1 (en) | DRILLING AND BORING TOOL | |
EP0437391B1 (en) | Perfectioned milling unit, especially for the milling of teeth | |
FR2535238A1 (en) | Plier-vice with wide separation capability | |
FR2475448A1 (en) | TIGHTENING KEY FOR CHUCK TOOL HOLDER | |
EP0207823A1 (en) | Pliers for opening pressurized jars | |
FR2695693A1 (en) | Fastening device for cable cover on support - comprises stop part in form of elastic ring or plain ring with band mounted slidably on cylindrical part of cover which also has socket | |
FR2516007A1 (en) | PLIERS | |
EP0115779A2 (en) | Control lever for a bicycle gear change | |
FR2618119A3 (en) | TWO-WHEELED VEHICLE WITH DEVICE FOR LOCKING AN OBJECT, IN PARTICULAR A HELMET, ON THE STRUCTURE OF THE VEHICLE |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |