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EP0342108A1 - Retractable arrow rest for a bow - Google Patents

Retractable arrow rest for a bow Download PDF

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Publication number
EP0342108A1
EP0342108A1 EP89401271A EP89401271A EP0342108A1 EP 0342108 A1 EP0342108 A1 EP 0342108A1 EP 89401271 A EP89401271 A EP 89401271A EP 89401271 A EP89401271 A EP 89401271A EP 0342108 A1 EP0342108 A1 EP 0342108A1
Authority
EP
European Patent Office
Prior art keywords
arrow
spring
sliding rod
heavy mass
rod
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Withdrawn
Application number
EP89401271A
Other languages
German (de)
French (fr)
Inventor
Claude Klein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0342108A1 publication Critical patent/EP0342108A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B5/00—Bows; Crossbows
    • F41B5/14—Details of bows; Accessories for arc shooting
    • F41B5/1403—Details of bows
    • F41B5/1438—Buttons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B5/00—Bows; Crossbows
    • F41B5/14—Details of bows; Accessories for arc shooting
    • F41B5/1403—Details of bows
    • F41B5/143—Arrow rests or guides

Definitions

  • the invention relates to a retractable bow support device for a bow
  • Retractable arrow rests are already known, which are fixed to the core of the bow close to the arrow holding zone, in order to support the arrow during aiming, then to retract as soon as the shooter releases the string from the bow. These devices prevent the arrow from being deflected from its path, particularly when the tail of the arrow reaches the level of the arrow rest.
  • the present invention aims in particular to remedy these drawbacks and for this purpose relates to a retractable boom support device, characterized in that the boom support consists of a rod sliding under the action of its spring.
  • the sliding rod and the pivot axis of the heavy mass are arranged substantially in the same plane.
  • the sliding rod constitutes an arrow rest and is arranged slightly at an oblique angle relative to the sight plane of the arc.
  • the heavy mass is provided with an opening which passes right through it and which is crossed with play by the sliding rod, the rod being provided with a lateral projection coming to bear, under the action of its spring against the edge of the opening, the width of the rod at the height of the projection being less than that of the opening.
  • the present invention therefore aims to achieve a retractable boom support device, which is robust, fast and precise, this device is not, moreover, the seat of parasitic oscillations from disturbing its operation.
  • the arrow is positioned at the height of the core 1, on the one hand by an arrow spacer 3, on the other hand by an arrow rest 4.
  • This arrow rest 4 consists of a hollow housing 5 of generally cylindrical shape, which is provided with a threaded extension 6 used for fixing the housing 5 to the core 1 by means of a nut 7, d 'a lock nut 8 and a support plate 9.
  • a heavy mass 10 Inside the hollow housing 5 is disposed a heavy mass 10, also of generally cylindrical shape, which is pivotally mounted on an upper axis 11 of the housing, this axis being disposed in a plane passing through the sliding t.-ge.
  • This heavy mass 10 is provided with an opening 12 of generally conical shape which passes right through it.
  • the housing 5 is provided, on either side of the heavy mass 10, with two orifices 131 and 132 which slidingly receive a rod 14.
  • This rod 14 constitutes the arrow rest proper and passes right through the housing 5 so that in one of its positions (shown in Figure 1), the arrow 2 can come to bear on the rod 14.
  • This rod 14 is slidably mounted in the housing 5 under the action of a spring to tube 15, which is arranged in the extension 6 around the rod 14.
  • This rod 14 is also provided with a projection 16 produced in the form of an annular flange and on which abuts one of the ends of the spring 15 The internal diameter of the spring 16 is less than the diameter of the collar.
  • the collar 16 has a diameter less than the diameter of the small base of the conical opening 12 and, in the locking position shown in FIG. 1, the axis of the opening 12 is offset from that of the rod 14, so that the flange 16 comes to bear against one of the faces of the heavy mass 10 up to the edge of the opening 12.
  • the weight 10 also includes a bore 17 (see FIG. 2) inside which is mounted a coil spring 18 pushing a finger 19. This finger also comes to bear against the internal wall of the hollow housing 5.
  • This spring of which the axis 181 is located substantially parallel to the plane 20 containing the pivot axis 11 and the sliding rod 14, keeps the heavy mass 10 in lateral abutment against the internal wall of the hollow housing 5
  • the housing 5 is fixed by its extension 6 to the core 1 of the arc, so that the sliding rod 14 is slightly inclined with respect to the plane of sight 21.
  • This arrangement has for effect of improving posture of the arrow on the sliding rod 14 by tending to slide it towards the spacer 3 in order to prevent it from falling from the sliding rod.
  • the cylindrical housing 22 is provided with an extension 23 by which it is fixed, to the core 1 of the arc, by means of a threaded ring 24 and a locking piece 25 to needle screw 26.
  • the housing 22 has a pivot axis 27 for a pivoting mass 28. This mass is provided with an opening 29 which is crossed by a rod 30 slidably mounted on either side of the heavy mass 28 in orifices 221 and 222 of the housing.
  • the rod 30 is made in two parts 31 and 32, sliding coaxially one inside the other, against a damping spring 33 which constantly tends to hold the end 321 of the internal part 32 against a internal projection of the external part 33.
  • the compression force of this spring 33 can be adjusted by a first screw 34 blocked by a second screw 35.
  • the part 32 of the rod is provided at its free end with a part 322 on the end of which the arrow 2 comes to bear, in order to keep it apart from the core of the arc 1.
  • the part 31 of the sliding rod 30 is provided with an external circular collar 36 whose diameter is slightly less than that of the or tapered shape 29 of the heavy mass 28.
  • This flange 36 also serves as a support for a coil spring 37 disposed coaxially outside the part 31, so that this spring 37 constantly tends to hold the projection 36 against the edge of the frustoconical opening 29.
  • an arrow support device comprising, in combination, the arrow rest 4 and the arrow spacer 3.
  • the housing 40 contains two heavy masses 41 and 42 pivoting on the same axis 43 and which constitute, one 41 the lock of the sliding rod 14 of the arrow rest 4, the other 42 the locking means for the sliding rod 30 of the boom spreader 3.
  • the heavy mass 41 is provided with a conical opening 12 whose edge forms the locking stop of the flange 16
  • This heavy mass 41 also includes a second opening 44 which forms a passage for the external part 31 of the sliding rod 30.
  • This opening 44 is of sufficient dimensions so that the heavy mass 41 never comes into contact with this part 31, whatever its angular position.
  • the heavy mass 42 has an opening 45 against the edge of which the flange 36 is applied when the deflector 3 is in the active position. This opening 45 extends to the periphery of the heavy mass 42 so as to also allow the passage of the sliding rod 14 without, however, affecting the movement of this rod.
  • O-rings made of self-lubricating material 46 may be provided around the sliding rods 30 and 14 in order to perfect their guidance.
  • the force of the springs will preferably be adjustable in order to adapt it to the reaction force produced, this reaction force being itself a function of the power of the arc.
  • the weight is pivotally mounted.
  • the weight is pivotally mounted along an axis perpendicular to the sliding rod.
  • the heavy mass 50 is produced in the form of a cylinder with circular section and is provided with an axial orifice serving as a passage for the sliding rod 52 whose end 53 forms the arrow rest.
  • the weight 50 is pivotally mounted in the vicinity of one of its ends on portions of axis 57 formed at the end of screws 56 screwed into the wall of the housing 54 so that these portions of axis 57 are oriented perpendicularly to the rod 52.
  • the axial orifice 51 is provided with a narrowed section end 511 against which an O-ring 58 is applied.
  • This narrowed part 511 is intended to constitute a stop for the lateral projection 59 of the sliding rod 52 on which acts as the helical spring 60.
  • the housing 54 is closed by a cover 61 against which one of the ends of a spring 62 is applied, housed in a perforation at the end of the heavy mass 50.
  • Resetting of the arrow rest is carried out by the reverse operation by pressing the rear end of the sliding rod 52 against the spring 60.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Seats For Vehicles (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Vibration Dampers (AREA)

Abstract

Dispositif de support de flèche escamotable pour arc, ce dispositif étant destiné à être fixé sur l'âme d'un arc à proximité de la zone de maintien de la flèche lors de son lancer, ce dispositif comportant un support de flèche mobile sous l'action d'un ressort (15) et une masse pesante mobile (10) de façon à être sensible aux forces de réaction produites par l'arc lors du lancer de la flèche, cette masse pesante constituant un verrou pour retenir le support de flèche en posi­tion active à l'encontre du ressort et pour le libérer lors du lancement de flèche afin de l'escamoter, dis­positif caractérisé en ce que le support de flèche (3, 4) est constitué par une tige (14) montée à coulisse­ment sous l'action de ce ressort (15).Retractable arrow support device for a bow, this device being intended to be fixed on the core of a bow near the area where the arrow is held when it is thrown, this device comprising a mobile arrow support under the action of a spring (15) and a movable heavy mass (10) so as to be sensitive to the reaction forces produced by the bow during the throwing of the arrow, this heavy mass constituting a lock to retain the arrow support in active position against the spring and to release it when the arrow is launched in order to retract it, device characterized in that the arrow support (3, 4) consists of a rod (14) mounted to slide under the action of this spring (15).

Description

L'invention concerne un dispositif de support de flèche escamotable pour arcThe invention relates to a retractable bow support device for a bow

On connaît déjà des repose-flèches escamota­bles, qui sont fixés sur l'âme de l'arc à proximité de la zone de maintien de la flèche, afin de soutenir la flèche lors de la visée, puis de s'escamoter dès que le tireur libère la corde de l'arc. Ces dispositifs évitent que la flèche ne soit déviée de sa trajectoi­re, particulièrement lorsque l'empennage de la flèche arrive à hauteur du repose-flèche.Retractable arrow rests are already known, which are fixed to the core of the bow close to the arrow holding zone, in order to support the arrow during aiming, then to retract as soon as the shooter releases the string from the bow. These devices prevent the arrow from being deflected from its path, particularly when the tail of the arrow reaches the level of the arrow rest.

Ces dispositifs connus se composent (voir par exemple le brevet américain N° 4 344 409) d'une masse pesante, qui coulisse à l'encontre d'un ressort et d'un repose-flèche monté pivotant également à l'en­contre d'un ressort. La masse pesante, sensible aux forces de réaction produites par l'arc lors du lance­ment de la flèche, constitue un verrou pour maintenir le repose-flèche en position active et, au contraire, pour libérer ce repose-flèche lors du lancement de la flèche, afin de l'escamoter sous l'action de son ressort.These known devices consist (see, for example, US Pat. No. 4,344,409) of a heavy mass, which slides against a spring and an arrow rest mounted also pivoting against a spring. The heavy mass, sensitive to the reaction forces produced by the bow when the arrow is launched, constitutes a lock to keep the arrow rest in the active position and, on the contrary, to release this arrow rest when the arrow is launched , in order to retract it under the action of its spring.

On comprend, bien entendu, que la libération du repose-flèche doit être extrêmement rapide puisqu'elle doit s'effectuer en un temps inférieur au temps de passage de la flèche devant l'âme de l'arc. Or, il est apparu que le dispositif connu ci-dessus ne permet pas d'aboutir, de manière fiable, à ce résul­tat. En outre, il manque totalement de sensibilité et est le siège de vibrations qui entraînent le repose-­flèche en oscillations lors du lancement de la flèche.It is understood, of course, that the release of the arrow rest must be extremely rapid since it must be carried out in a time less than passage time of the arrow in front of the soul of the bow. However, it appeared that the device known above does not allow this result to be obtained in a reliable manner. In addition, it totally lacks sensitivity and is the seat of vibrations which cause the arrow rest in oscillations when the arrow is launched.

La présente invention a notamment pour but de remédier à ces inconvénients et concerne à cet effet un dispositif de support de flèche escamotable, caractérisé en ce que le support de flèche est consti­tué par une tige coulissant sous l'action de son ressort.The present invention aims in particular to remedy these drawbacks and for this purpose relates to a retractable boom support device, characterized in that the boom support consists of a rod sliding under the action of its spring.

Suivant une autre caractéristique de l'in­vention, la tige coulissante et l'axe de pivotement de la masse pesante sont disposés sensiblement dans un même plan.According to another characteristic of the invention, the sliding rod and the pivot axis of the heavy mass are arranged substantially in the same plane.

Suivant une autre caractéristique de l'in­vention, la tige coulissante constitue un repose-­flèche et est disposée légèrement en oblique par rapport au plan de visée de l'arc.According to another characteristic of the invention, the sliding rod constitutes an arrow rest and is arranged slightly at an oblique angle relative to the sight plane of the arc.

Suivant une autre caractéristique de l'in­vention, la masse pesante est pourvue d'une ouverture qui la traverse de part en part et qui est traversée avec jeu par la tige coulissante, la tige étant pour­vue d'une saillie latérale venant en appui, sous l'action de son ressort contre le bord de l'ouverture, la largeur de la tige à hauteur de la saillie étant inférieure à celle de l'ouverture.According to another characteristic of the invention, the heavy mass is provided with an opening which passes right through it and which is crossed with play by the sliding rod, the rod being provided with a lateral projection coming to bear, under the action of its spring against the edge of the opening, the width of the rod at the height of the projection being less than that of the opening.

L'invention est représentée à titre d'exem­ple non limitatif sur les dessins ci-joints, dans lesquels :

  • - la figure 1 est une vue en coupe schémati­que d'un mode de réalisation du dispositif conforme à l'invention adapté sur l'âme d'un arc ;
  • - la figure 2 est une vue en coupe suivant A-A de la figure 1 ; la figure 3 est une vue en coupe axiale schématique d'un écarteur de flèche adapté sur l'âme d'un arc ;
  • - la figure 4 représente un dispositif combiné formant à la fois repose-flèche et écarteur de flèche ;
  • - les figures 5 et 6 sont respectivement des coupes suivant B-B et C-C des masses pesantes de la figure 4 ;
  • - la figure 7 est une vue en coupe axiale d'un autre mode de réalisation du dispositif ;
  • - la figure 8 est une coupe suivant B-B de la figure 7 ;
  • - la figure 9 est une coupe partielle sui­vant C-C de la figure 7.
The invention is shown by way of nonlimiting example in the accompanying drawings, in which:
  • - Figure 1 is a schematic sectional view of an embodiment of the device according to the invention adapted on the core of an arc;
  • - Figure 2 is a sectional view along AA of Figure 1; Figure 3 is a schematic axial sectional view of a deflector adapted on the core of an arc;
  • - Figure 4 shows a combined device forming both an arrow rest and arrow spreader;
  • - Figures 5 and 6 are respectively sections along BB and CC of the heavy masses of Figure 4;
  • - Figure 7 is an axial sectional view of another embodiment of the device;
  • - Figure 8 is a section along BB of Figure 7;
  • FIG. 9 is a partial section along CC of FIG. 7.

La présente invention a en conséquence pour but la réalisation d'un dispositif de support de flèche escamotable, qui soit robuste, rapide et précis, ce dispositif n'étant pas, en outre, le siège d'oscillations parasites venant perturber son fonc­tionnement.The present invention therefore aims to achieve a retractable boom support device, which is robust, fast and precise, this device is not, moreover, the seat of parasitic oscillations from disturbing its operation.

Sur la figure 1, on a représenté l'âme 1 d'un arc dont la poignée est située en 1₁. Cet arc reçoit une flèche 2.In Figure 1, there is shown the core 1 of an arc whose handle is located in 1₁. This arc receives an arrow 2.

La flèche est positionnée à hauteur de l'âme 1, d'une part par un écarteur de flèche 3, d'autre part par un repose-flèche 4.The arrow is positioned at the height of the core 1, on the one hand by an arrow spacer 3, on the other hand by an arrow rest 4.

Ce repose-flèche 4 se compose d'un boîtier creux 5 de forme générale cylindrique, qui est pourvu d'un prolongement fileté 6 servant à la fixation du boîtier 5 sur l'âme 1 par l'intermédiaire d'un écrou 7, d'un contre-écrou 8 et d'une plaque d'appui 9.This arrow rest 4 consists of a hollow housing 5 of generally cylindrical shape, which is provided with a threaded extension 6 used for fixing the housing 5 to the core 1 by means of a nut 7, d 'a lock nut 8 and a support plate 9.

A l'intérieur du boîtier creux 5 est dispo­sée une masse pesante 10, également de forme générale cylindrique, qui est montée à pivotement sur un axe supérieur 11 du boîtier, cet axe étant disposé dans un plan passant par la t.-ge coulissante. Cette masse pesante 10 est pourvue d'une ouverture 12 de forme générale conique qui la traverse de part en part.Inside the hollow housing 5 is disposed a heavy mass 10, also of generally cylindrical shape, which is pivotally mounted on an upper axis 11 of the housing, this axis being disposed in a plane passing through the sliding t.-ge. This heavy mass 10 is provided with an opening 12 of generally conical shape which passes right through it.

Le boîtier 5 est pourvu, de part et d'autre de la masse pesante 10, de deux orifices 13₁ et 13₂ qui reçoivent à coulissement une tige 14. Cette tige 14 constitue le repose-flèche proprement dit et traverse de part en part le boîtier 5 afin que dans l'une de ses positions (représentée sur la figure 1), la flèche 2 puisse venir en appui sur la tige 14. Cette tige 14 est montée à coulissement dans le boîtier 5 sous l'action d'un ressort à boudin 15, qui est disposé dans le prolongement 6 autour de la tige 14. Cette tige 14 est également pourvue d'une saillie 16 réalisée sous la forme d'une collerette annulaire et sur laquelle vient en appui l'une des extrémités du ressort 15. Le diamètre intérieur du ressort 16 est inférieur au diamètre de la collerette. La collerette 16 est d'un diamètre inférieur au diamètre de la peti­te base de l'ouverture conique 12 et, en position de verrouillage représentée sur la figure 1, l'axe de l'ouverture 12 est décalé de celui de la tige 14, de façon que la collerette 16 vienne en appui contre l'une des faces de la masse pesante 10 à hauteur du bord de l'ouverture 12.The housing 5 is provided, on either side of the heavy mass 10, with two orifices 13₁ and 13₂ which slidingly receive a rod 14. This rod 14 constitutes the arrow rest proper and passes right through the housing 5 so that in one of its positions (shown in Figure 1), the arrow 2 can come to bear on the rod 14. This rod 14 is slidably mounted in the housing 5 under the action of a spring to tube 15, which is arranged in the extension 6 around the rod 14. This rod 14 is also provided with a projection 16 produced in the form of an annular flange and on which abuts one of the ends of the spring 15 The internal diameter of the spring 16 is less than the diameter of the collar. The collar 16 has a diameter less than the diameter of the small base of the conical opening 12 and, in the locking position shown in FIG. 1, the axis of the opening 12 is offset from that of the rod 14, so that the flange 16 comes to bear against one of the faces of the heavy mass 10 up to the edge of the opening 12.

La masse pesante 10 comporte également un perçage 17 (voir figure 2) à l'intérieur duquel est monté un ressort à boudin 18 repoussant un doigt 19. Ce doigt vient par ailleurs en appui contre la paroi interne du boîtier creux 5. Ce ressort, dont l'axe 18₁ est situé sensiblement parallèlement au plan 20 conte­nant l'axe de pivotement 11 et la tige coulissante 14, maintient la masse pesante 10 en appui latéral contre la paroi interne du boîtier creux 5The weight 10 also includes a bore 17 (see FIG. 2) inside which is mounted a coil spring 18 pushing a finger 19. This finger also comes to bear against the internal wall of the hollow housing 5. This spring, of which the axis 18₁ is located substantially parallel to the plane 20 containing the pivot axis 11 and the sliding rod 14, keeps the heavy mass 10 in lateral abutment against the internal wall of the hollow housing 5

Lors du lancer de la flèche 2, les forces de réaction créées sur l'âme de l'arc par la corde de cet arc produisent le pivotement de la masse pesante 10 autour de l'axe 11 à l'encontre du ressort 18. Cela a pour effet de placer l'ouverture conique 11 en concordance de la collerette 16 de façon que le ressort 15 repousse brusquement la tige 14 jusqu'à ce que cette saillie 16 vienne en appui dans un logement opposé 5₁ du boîtier 5. Dans cette position, la tige 14 est complètement escamotée à l'intérieur du prolon­gement 6 et la flèche peut poursuivre sa trajectoire sans risque d'être déviée par la mise en contact de son empennage avec cette tige 14.When throwing the arrow 2, the reaction forces created on the core of the arc by the string of this arc produce the pivoting of the heavy mass 10 around the axis 11 against the spring 18. This has the effect of placing the conical opening 11 in concordance with the flange 16 so that the spring 15 abruptly pushes the rod 14 until this projection 16 comes to bear in an opposite housing 5 boîtier of the housing 5. In this position , the rod 14 is completely retracted inside the extension 6 and the boom can continue its trajectory without risk of being deflected by bringing its tail into contact with this rod 14.

Pour produire le réarmement de ce repose-­flèche, il suffit d'exercer une poussée sur l'extrémi­té 14₁, ce qui a pour effet de faire pivoter la masse pesante 10 à l'encontre du ressort 18, du fait du glissement de la saillie 16 contre la paroi conique de l'ouverture 12. Ce mouvement se poursuit jusqu'à ce que la saillie 16 se place au-delà de la masse pesante 10. A ce moment, le ressort 18 ramène la masse pesante 10 dans la position représentée sur la figure 2 et on peut alors relâcher la pression exercée sur la tige 14 de façon que la collerette 16 vient à nouveau en appui sur la face latérale de la masse pesante 10.To reset this arrow rest, it suffices to push the end 14₁, which has the effect of rotating the heavy mass 10 against the spring 18, due to the sliding of the projection 16 against the conical wall of the opening 12. This movement continues until the projection 16 is placed beyond the heavy mass 10. At this time, the spring 18 brings the heavy mass 10 back to the position shown in FIG. 2 and the pressure exerted on the rod 14 can then be released so that the flange 16 again comes to bear on the side face of the heavy mass 10.

Comme on le remarque sur la figure 1, le boîtier 5 est fixé par son prolongement 6 sur l'âme 1 de l'arc, de façon que la tige coulissante 14 soit légèrement inclinée par rapport au plan de visée 21. Cette disposition a pour effet d'améliorer le maintien de la flèche sur la tige coulissante 14 en tendant à la faire glisser vers l'écarteur 3 afin d'éviter qu'elle ne tombe de la tige coulissante.As can be seen in FIG. 1, the housing 5 is fixed by its extension 6 to the core 1 of the arc, so that the sliding rod 14 is slightly inclined with respect to the plane of sight 21. This arrangement has for effect of improving posture of the arrow on the sliding rod 14 by tending to slide it towards the spacer 3 in order to prevent it from falling from the sliding rod.

Sur la figure 3, on a représenté un support de flèche réalisé également sur le même principe de construction mais qui constitue, dans ce cas, un écar­teur de flèche dénommé également "berger bouton".In Figure 3, there is shown an arrow support also produced on the same principle of construction but which constitutes, in this case, an arrow spacer also called "button shepherd".

Dans ce cas, le boîtier cylindrique 22 est pourvu d'un prolongement 23 par lequel il est fixé, à l'âme 1 de l'arc, par l'intermédiaire d'une bague filetée 24 et d'une pièce de blocage 25 à vis pointeau 26.In this case, the cylindrical housing 22 is provided with an extension 23 by which it is fixed, to the core 1 of the arc, by means of a threaded ring 24 and a locking piece 25 to needle screw 26.

Le boîtier 22 comporte un axe de pivotement 27 pour une masse pivotante 28. Cette masse est pour­vue d'une ouverture 29 qui est traversée par une tige 30 montée à coulissement de part et d'autre de la masse pesante 28 dans des orifices 22₁ et 22₂ du boîtier.The housing 22 has a pivot axis 27 for a pivoting mass 28. This mass is provided with an opening 29 which is crossed by a rod 30 slidably mounted on either side of the heavy mass 28 in orifices 22₁ and 22₂ of the housing.

La tige 30 est réalisée en deux parties 31 et 32, coulissant coaxialement l'une dans l'autre, à l'encontre d'un ressort d'amortissement 33 qui tend constamment à maintenir l'extrémité 32₁ de la partie interne 32 contre une saillie interne de la partie externe 33.The rod 30 is made in two parts 31 and 32, sliding coaxially one inside the other, against a damping spring 33 which constantly tends to hold the end 32₁ of the internal part 32 against a internal projection of the external part 33.

La force de compression de ce ressort 33 peut être réglée par une première vis 34 bloquée par une seconde vis 35.The compression force of this spring 33 can be adjusted by a first screw 34 blocked by a second screw 35.

La partie 32 de la tige est pourvue à son extrémité libre d'une pièce 32₂ sur l'extrémité de laquelle vient s'appuyer la flèche 2, pour la mainte­nir écartée de l'âme de l'arc 1.The part 32 of the rod is provided at its free end with a part 32₂ on the end of which the arrow 2 comes to bear, in order to keep it apart from the core of the arc 1.

La partie 31 de la tige coulissante 30 est pourvue d'une collerette circulaire extérieure 36 dont le diamètre est légèrement inférieur à celle de l'ou­ verture tronconique 29 de la masse pesante 28.The part 31 of the sliding rod 30 is provided with an external circular collar 36 whose diameter is slightly less than that of the or tapered shape 29 of the heavy mass 28.

Cette collerette 36 sert par ailleurs d'appui à un ressort à boudin 37 disposé coaxialement à l'extérieur de la partie 31, afin que ce ressort 37 tende constamment à maintenir la saillie 36 contre le bord de l'ouverture tronconique 29.This flange 36 also serves as a support for a coil spring 37 disposed coaxially outside the part 31, so that this spring 37 constantly tends to hold the projection 36 against the edge of the frustoconical opening 29.

Le fonctionnement de ce dispositif est le suivant.The operation of this device is as follows.

Lors d'un lancer de flèche, l'accélération brutale qu'elle subit se traduit par un léger cintre­ment de la hampe de la flèche qui pourrait se traduire par une déviation de sa trajectoire. Cette déviation est cependant évitée par l'écarteur de flèche conforme à l'invention, du fait que la partie 32 de la tige 30 coulisse à l'encontre du ressort d'amortissement 33 afin de prendre en considération le cintrage du support de flèche et en évitant de dévier sa trajec­toire. Simultanément à cet amortissement, les forces de réaction créées lors du lâcher de la corde se traduisent par un pivotement de la masse pesante 28 jusqu'à ce que la collerette 36 échappe au rebord de la masse pesante 28. Le ressort 37 repousse alors brusquement l'ensemble de la tige 30 en escamotant l'extrémité 32₂ à l'intérieur du prolongement 23.During an arrow throw, the sudden acceleration it undergoes results in a slight bending of the shaft of the arrow which could result in a deviation from its trajectory. This deviation is however avoided by the deflector of boom according to the invention, because the part 32 of the rod 30 slides against the damping spring 33 in order to take into account the bending of the boom support and avoiding to deviate from its trajectory. Simultaneously with this damping, the reaction forces created when the rope is released result in a pivoting of the heavy mass 28 until the flange 36 escapes the edge of the heavy mass 28. The spring 37 then suddenly repels the 'assembly of the rod 30 by retracting the end 32₂ inside the extension 23.

La remise en position active de l'écarteur de flèche s'effectue de la même manière que pour le repose-flèche en repoussant la tige 30 à l'encontre du ressort 37 jusqu'à ce que la collerette 36 vienne en appui contre le bord de l'ouverture 29 de la masse pesante 28.The return to active position of the boom spreader is carried out in the same way as for the arrow rest by pushing the rod 30 against the spring 37 until the flange 36 comes to bear against the edge of the opening 29 of the weight 28.

Dans l'exemple de réalisation de la figure 4, on a représenté un dispositif de support de flèche comportant, en combinaison, le repose-flèche 4 et l'écarteur de flèche 3. Dans ce cas, le boîtier 40 contient deux masses pesantes 41 et 42 pivotant sur un même axe 43 et qui constituent, l'une 41 le verrou de la tige coulissante 14 du repose-flèche 4, l'autre 42 le moyen de verrouillage pour la tige coulissante 30 de l'écarteur de flèche 3.In the embodiment of Figure 4, there is shown an arrow support device comprising, in combination, the arrow rest 4 and the arrow spacer 3. In this case, the housing 40 contains two heavy masses 41 and 42 pivoting on the same axis 43 and which constitute, one 41 the lock of the sliding rod 14 of the arrow rest 4, the other 42 the locking means for the sliding rod 30 of the boom spreader 3.

La masse pesante 41 est pourvue d'une ouver­ture conique 12 dont le bord forme la butée de verrouillage de la collerette 16 Cette masse pesante 41 comporte également une seconde ouverture 44 qui forme un passage pour la partie extérieure 31 de la tige coulissante 30. Cette ouverture 44 est de dimen­sions suffisantes pour que la masse pesante 41 ne vienne jamais en contact de cette partie 31, quelle que soit sa position angulaire. Par contre, la masse pesante 42 comporte une ouverture 45 contre le bord de laquelle vient s'appliquer la collerette 36 lorsque l'écarteur de flèche 3 est en position active. Cette ouverture 45 se prolonge jusqu'à la périphérie de la masse pesante 42 afin de permettre également le passa­ge de la tige coulissante 14 sans cependant intervenir sur le débattement de cette tige.The heavy mass 41 is provided with a conical opening 12 whose edge forms the locking stop of the flange 16 This heavy mass 41 also includes a second opening 44 which forms a passage for the external part 31 of the sliding rod 30. This opening 44 is of sufficient dimensions so that the heavy mass 41 never comes into contact with this part 31, whatever its angular position. On the other hand, the heavy mass 42 has an opening 45 against the edge of which the flange 36 is applied when the deflector 3 is in the active position. This opening 45 extends to the periphery of the heavy mass 42 so as to also allow the passage of the sliding rod 14 without, however, affecting the movement of this rod.

Des joints toriques en matériau auto­lubrifiant 46, pourront être prévus autour des tiges coulissantes 30 et 14 afin de parfaire leur guidage.O-rings made of self-lubricating material 46 may be provided around the sliding rods 30 and 14 in order to perfect their guidance.

Egalement, le guidage latéral des masses pesantes 10, 28, 41 et 42 pourra être amélioré en prévoyant des billes de roulement 47 (voir figures 1 et 3).Also, the lateral guidance of the heavy masses 10, 28, 41 and 42 could be improved by providing rolling balls 47 (see Figures 1 and 3).

Dans tous ces modes de réalisation, la force des ressorts sera de préférence réglable afin de l'adapter à la force de réaction produite, cette force de réaction étant elle-même fonction de la puissance de l'arc.In all of these embodiments, the force of the springs will preferably be adjustable in order to adapt it to the reaction force produced, this reaction force being itself a function of the power of the arc.

Egalement, suivant les modes de réalisation des figures de 1 à 6, la masse pesante est montée pi­votante. Par contre, suivant le mode de réalisation des figures de 7 à 9, la masse pesante est montée pi­votante suivant un axe perpendiculaire à la tige cou­lissante. Ainsi, dans ce cas, la masse pesante 50 est réalisée sous la forme d'un cylindre à section circu­laire et est pourvue d'un orifice axial servant de passage à la tige coulissante 52 dont l'extrémité 53 forme le repose-flèche. La masse pesante 50 est montée pivotante au voisinage de l'une de ses extrémités sur des portions d'axe 57 formées à l'extrémité de vis 56 vissées dans la paroi du boîtier 54 de façon que ces portions d'axe 57 soient orientées perpendiculairement à la tige 52. L'orifice axial 51 est pourvu d'une ex­trémité de section rétrécie 51₁ contre laquelle est appliqué un joint torique 58. Cette partie rétrécie 51₁ est destinée à constituer une butée pour la sail­lie latérale 59 de la tige coulissante 52 sur laquelle agit le ressort hélicoïdal 60.Also, according to the embodiments Figures 1 to 6, the weight is pivotally mounted. By cons, according to the embodiment of Figures 7 to 9, the weight is pivotally mounted along an axis perpendicular to the sliding rod. Thus, in this case, the heavy mass 50 is produced in the form of a cylinder with circular section and is provided with an axial orifice serving as a passage for the sliding rod 52 whose end 53 forms the arrow rest. The weight 50 is pivotally mounted in the vicinity of one of its ends on portions of axis 57 formed at the end of screws 56 screwed into the wall of the housing 54 so that these portions of axis 57 are oriented perpendicularly to the rod 52. The axial orifice 51 is provided with a narrowed section end 51₁ against which an O-ring 58 is applied. This narrowed part 51₁ is intended to constitute a stop for the lateral projection 59 of the sliding rod 52 on which acts as the helical spring 60.

Le boîtier 54 est fermé par un couvercle 61 contre lequel vient s'appliquer l'une des extrémités d'un ressort 62 logé dans une perforation de l'extré­mité de la masse pesante 50.The housing 54 is closed by a cover 61 against which one of the ends of a spring 62 is applied, housed in a perforation at the end of the heavy mass 50.

Le fonctionnement de ce dispositif est simi­laire à celui du mode de réalisation des figures de 1 à 6. Ainsi, lors de la libération de la corde de l'arc, les forces de réaction créées produisent le pi­votement de la masse 50 autour des portions d'axe 57 jusqu'à ce que l'orifice 51 se place coaxialement à la saillie 59. A ce moment, le ressort 60 fait coulisser brusquement la tige 52 pour que son extrémité de repo­se-flèche 53 s'escamote à l'intérieur du prolongement fileté 55 du boîtier 54.The operation of this device is similar to that of the embodiment of Figures 1 to 6. Thus, upon release of the string from the bow, the reaction forces created produce the pivoting of the mass 50 around the portions d axis 57 until the orifice 51 is placed coaxially with the projection 59. At this time, the spring 60 causes the rod 52 to slide suddenly so that its end of the arrow rest 53 retracts inside the threaded extension 55 of housing 54.

Le réarmement du repose-flèche s'effectue par la manoeuvre inverse en appuyant sur l'extrémité arrière de la tige coulissante 52 à l'encontre du res­sort 60.Resetting of the arrow rest is carried out by the reverse operation by pressing the rear end of the sliding rod 52 against the spring 60.

Claims (14)

1) Dispositif de support de flèche escamota­ble pour arc, ce dispositif étant destiné à être fixé sur l'âme d'un arc à proximité de la zone de maintien de la flèche lors de son lancer, ce dispositif compor­tant un support de flèche mobile sous l'action d'un ressort et une masse pesante mobile de façon à être sensible aux forces de réaction produites par l'arc lors du lancer de la flèche, cette masse pesante cons­tituant un verrou pour retenir le support de flèche en position active à l'encontre du ressort et pour le libérer lors du lancement de flèche afin de l'escamo­ter, dispositif caractérisé en ce que le support de flèche (3, 4) est constitué par une tige (14, 30) montée à coulissement sous l'action de ce ressort (15, 37).1) Retractable arrow support device for bow, this device being intended to be fixed on the core of an arc near the holding zone of the arrow during its launching, this device comprising a movable arrow support under the action of a spring and a mobile heavy mass so as to be sensitive to the reaction forces produced by the bow during the launching of the arrow, this heavy mass constituting a lock for retaining the arrow support in the active position at the against the spring and to release it when launching the boom in order to retract it, device characterized in that the boom support (3, 4) consists of a rod (14, 30) mounted to slide under the action of this spring (15, 37). 2) Dispositif conforme à la revendication 1, caractérisé en ce que la tige coulissante et l'axe de pivotement (11, 27) de la masse pesante (10, 28) sont disposés sensiblement dans un même plan.2) Device according to claim 1, characterized in that the sliding rod and the pivot axis (11, 27) of the heavy mass (10, 28) are arranged substantially in the same plane. 3) Dispositif conforme à l'une quelconque des revendications précédentes, caractérisé en ce que l'axe de pivotement est parallèle à la tige coulissan­te.3) Device according to any one of the preceding claims, characterized in that the pivot axis is parallel to the sliding rod. 4) Dispositif conforme à l'une quelconque des revendications précédentes, caractérisé en ce que la tige coulissante (14) constitue un repose-flèche et est disposée légèrement en oblique par rapport au plan de visée (21) de l'arc.4) Device according to any one of the preceding claims, characterized in that the sliding rod (14) constitutes an arrow rest and is disposed slightly obliquely relative to the sight plane (21) of the arc. 5) Dispositif conforme à l'une quelconque des revendications précédentes, caractérisé en ce que la masse pesante est pourvue d'une ouverture (12, 29) qui la traverse de part en part et qui est traversée avec jeu par la tige coulissante, la tige étant pour­ vue d'une saillie latérale (16, 36) venant en appui, sous l'action de son ressort (15, 37) contre le bord de l'ouverture considérée, la largeur de la saillie étant inférieure à celle de l'ouverture.5) Device according to any one of the preceding claims, characterized in that the heavy mass is provided with an opening (12, 29) which passes right through it and which is crossed with play by the sliding rod, the rod being for view of a lateral projection (16, 36) bearing, under the action of its spring (15, 37) against the edge of the opening considered, the width of the projection being less than that of the opening. 6) Dispositif conforme à l'une quelconque des revendications précédentes, caractérisé en ce que le ressort (15, 37) de la tige coulissante (1) est un ressort à boudin disposé coaxialement à la tige et dont le diamètre extérieur est inférieur à la largeur de la saillie (16, 36).6) Device according to any one of the preceding claims, characterized in that the spring (15, 37) of the sliding rod (1) is a coil spring arranged coaxially with the rod and whose outside diameter is less than the width of the projection (16, 36). 7) Dispositif conforme à la revendication 5, caractérisé en ce que l'ouverture (12, 29) est évasée, sa section la plus faible étant située à hauteur de son extrémité dont le bord reçoit en appui la saillie.7) Device according to claim 5, characterized in that the opening (12, 29) is flared, its smallest section being located at the level of its end whose edge receives in support the projection. 8) Dispositif conforme à l'une quelconque des revendications précédentes, caractérisé en ce que la masse pesante est disposée à l'intérieur d'un boî­tier (5, 22) pourvu de deux orifices (13₁, 13₂, 22₁, 22₂) disposés de part et d'autre de la masse pesante, ces orifices recevant à coulissement la tige coulis­sante qui traverse de part en part le boîtier.8) Device according to any one of the preceding claims, characterized in that the heavy mass is disposed inside a housing (5, 22) provided with two orifices (13₁, 13₂, 22₁, 22₂) arranged on either side of the heavy mass, these orifices slidingly receiving the sliding rod which passes right through the housing. 9) Dispositif conforme à l'une quelconque des revendications précédentes, caractérisé en ce qu'un ressort de rappel (18) est prévu pour coopérer avec la masse pesante, ce ressort étant orienté dans une direction (18₁) approximativement parallèle au plan (20) contenant l'axe de pivotement (11, 27) et la tige coulissante (14, 30).9) Device according to any one of the preceding claims, characterized in that a return spring (18) is provided to cooperate with the heavy mass, this spring being oriented in a direction (18₁) approximately parallel to the plane (20 ) containing the pivot pin (11, 27) and the sliding rod (14, 30). 10) Dispositif conforme à l'une quelconque des revendications précédentes, caractérisé en ce que la tige coulissante (30) constitue un écarteur de flèche et est réalisée en deux parties (31, 32) cou­lissant l'une dans l'autre à l'encontre d'un ressort amortisseur (33).10) Device according to any one of the preceding claims, characterized in that the sliding rod (30) constitutes an arrow spreader and is produced in two parts (31, 32) sliding one inside the other at the against a damping spring (33). 11) Dispositif conforme à l'une quelconque des revendications précédentes, caractérisé en ce que le boîtier (40) contient deux masses pesantes (41, 42) montées à pivotement sur un même axe (43) et deux tiges coulissantes (14, 30) qui les traversent de part en part, l'une de ces tiges constit-ant un repose-­flèche, l'autre un écarteur de flèche.11) Device according to any one of the preceding claims, characterized in that the housing (40) contains two heavy masses (41, 42) pivotally mounted on the same axis (43) and two sliding rods (14, 30) which go right through them, one of these rods constituting an arrow rest, the other an arrow spreader. 12) Dispositif conforme à la revendication 10, caractérisé en ce que les deux masses pesantes sont toutes deux pourvues d'ouvertures assurant le passage avec jeu des deux tiges coulissantes, une extrémité d'une ouverture de chacune des masses for­mant un verrou de retenue pour une des tiges.12) Device according to claim 10, characterized in that the two heavy masses are both provided with openings ensuring the passage with clearance of the two sliding rods, one end of an opening of each of the masses forming a retaining lock for one of the stems. 13) Dispositif conforme à la revendication 1, caractérisé en ce que la tige coulissante et l'axe de pivotement de la masse pesante sont sensiblement perpendiculaires.13) Device according to claim 1, characterized in that the sliding rod and the pivot axis of the heavy mass are substantially perpendicular. 14) Dispositif conforme à la revendication 13, caractérisé en ce que la masse pesante est réali­sée sous la forme d'un cylindre pourvu d'un passage axial traversé par la tige coulissante, l'axe de pivo­tement étant situé transversalement à proximité d'une extrémité du cylindre.14) Device according to claim 13, characterized in that the heavy mass is produced in the form of a cylinder provided with an axial passage through which the sliding rod passes, the pivot axis being located transversely near a end of the cylinder.
EP89401271A 1988-05-11 1989-05-05 Retractable arrow rest for a bow Withdrawn EP0342108A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8806375 1988-05-11
FR8806375A FR2631435B1 (en) 1988-05-11 1988-05-11 RETRACTABLE BOOM SUPPORT DEVICE FOR ARC

Publications (1)

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EP0342108A1 true EP0342108A1 (en) 1989-11-15

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ID=9366235

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EP89401271A Withdrawn EP0342108A1 (en) 1988-05-11 1989-05-05 Retractable arrow rest for a bow

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US (1) US4907566A (en)
EP (1) EP0342108A1 (en)
JP (1) JPH0213794A (en)
FR (1) FR2631435B1 (en)

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US6595195B1 (en) * 2002-01-18 2003-07-22 Montana Black Gold Arrow rest device
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US7311099B2 (en) * 2002-09-13 2007-12-25 Bear Archery, Inc. Vertical drop arrow rest
US6823856B2 (en) * 2002-09-13 2004-11-30 Christopher A. Rager Vertical drop arrow rest
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Also Published As

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US4907566A (en) 1990-03-13
FR2631435A1 (en) 1989-11-17
JPH0213794A (en) 1990-01-18
FR2631435B1 (en) 1990-08-31

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