• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Locking knife with ball lock (4) made with a small number of easy to manufacture parts. The knife comprises at least one handle (1), 1 blade (3) mounted on an axis (2) and free to rotate. The handle is provided with at least one ball lock device consisting of a projecting locking ball (4) inside the handle (1), a solid washer made of stainless material (5), a cylindrical elastomer spring (6), a housing tube (7) for the spring and a cover (11) for holding the locking device inside the handle (1).
    公开号:BE1023210B1
    申请号:E2015/0264
    申请日:2015-01-19
    公开日:2016-12-21
    发明作者:Laurent Cordier
    申请人:Laurent Cordier；
    IPC主号:
    专利说明:

    Locking knife with ball lock
    The present invention relates to a closing knife with a ball lock on an elastomer spring.
    To keep the blade of a closing knife in the unfolded position, a ferrule device, such as that disclosed by FR 2 855 995, is known. Knives are also known whose blade is provided with a housing for receiving a part. mobile or spring. Such knives are for example described in FR-A-2906750, US-A-1357398, FR-A-2851189 or DE-A-2123537. There are also fixed ferrule locking devices as described in FR 2 971 183 or insertion locking as described in FR 2 935 283. There are also ball locks as disclosed in FR 2 610 237 but often to be accompanied another complementary device to ensure a sufficient blade holding force, for example an additional spring. There is also a ball lock system described in US 5,699,615 (CHEN SHUN-FU [TW]) but it also differs from the concept explained hereinafter.
    These different mechanisms are relatively complex to manufacture because they require a greater number of parts, resulting in a cost of design and significant manufacturing. They are also subjected to frictional wear at the locking member or fatigue by the regular biasing of a metal spring.
    The present invention more particularly aims to overcome the disadvantages of the various devices mentioned above and to provide a new simple technical solution using a device (at least one) ball placed on a powerful elastomer spring to hold the blade in its position unfolded or folded. The use of an elastomer spring will also bring the following advantages: a very low manufacturing cost, a very small footprint and mass for a high load, an infinity of shape possible, a stainless and hard-wearing solution , the transformation of axial stresses into radial stresses. For this purpose, the subject of the invention is a closing knife with a ball blade lock, made with a small number of easy-to-manufacture parts, comprising: the handle, consisting of a single piece or two assembled longitudinal half-sleeves , for example, by spacers, - at least one blade mounted on an axis and free to rotate between an unfolded position out of the handle and a folded position inside the handle, - the ball lock device located in the handle and consisting of: a ball of hard and stainless material, a cylindrical elastomer spring, a tube made of stainless material intended to receive the elastomer spring, a washer of adapted shape, contact interface between the ball and the elastomer spring, o a suitably shaped lid, fixed inside the handle and provided with a hole for the axis of the blade and a bore to retain the ball but leave it protruding at Inside the handle.
    When the blade is completely unfolded out of the handle or folded in the handle, it comes to rest on a stop integrated in the handle. This stop may be the handle itself, a spacer or a simple nail (or rivet). This device will serve only to limit the rotation of the blade between its unfolded position out of the handle and its folded position in the handle.
    When the blade is fully unfolded or folded, the ball lock device inserted in the handle will locate and firmly hold the blade in its position through a fingerprint properly made on the heel of this blade. This firm holding of the blade in its folded or unfolded position is particularly important to prevent the blade from unfolding, for example in a pocket, or folds on the fingers of the user. This ball lock therefore contributes to a secure design. This ball lock is a forced notch.
    In the ball lock device, the cover or the plate fixed inside the handle will be provided with a bore to retain the ball but leave it protruding inside the handle. During the rotation of the blade, it exerts a pressure force on the ball. This pressure force compresses the elastomer spring, forces the ball to enter the handle and then allows the rotation of the blade.
    In this device, the heel of the blade is provided with at least two indentations adapted to the diameter of the ball. A fingerprint will be used to receive the ball when the blade is fully unfolded out of the handle, the second fingerprint will receive the ball when the blade is fully folded inside the handle. When the blade is in the unfolded or folded position, the ball will locate and firmly hold the blade in its position by exerting sufficient force on the heel prints. This force is provided by the powerful elastomer spring.
    In this device also, the powerful but very small elastomer spring is housed in the handle of the knife or ideally in a stainless tube, itself housed in the handle. This elastomer spring is of cylindrical shape and possibly pierced at its center. The advantages of an elastomer spring are numerous: the desired geometric dimensions and shapes can be easily obtained by cutting or any other means, its bulk and mass are very small for a high compression force, its price is very high. low,
    It is possible to obtain, by successive tests or calculation, the appropriate force and size to integrate harmoniously into the handle of the knife, the hardness of the spring can also be chosen to obtain the desired force when the ball is compressed by the rotating blade and when the blade is locked in its folded or unfolded position. - When the spring is compressed, its elastic deformation will transform most of the axial forces into radial forces. This feature is particularly important because it will reduce the mechanical stress in the handle of the knife. Indeed, the radial force thus transmitted by the compression spring will be applied to the walls of the spring housing tube and not directly on the wooden handle of the knife.
    In this device also, the elastomer spring is surmounted by a washer made of smooth and stainless material. The ball is placed on this washer in order to rotate freely. The solid washer also serves as a contact interface between the ball and the spring. The ball lock device is then like a small piston.
    According to advantageous non-mandatory aspects of the invention, the knife may incorporate one or more of the following features: - The blade is mounted on an axis consisting of a binding screw. This additional device makes it possible to adjust the tightness of the blade in the handle and therefore the force required to unfold or fold it. - The handle of the knife is made in one piece, for example by molding or machining of different materials. This design allows, for example, to use the handle itself as a blade stop and thus further reduce the number of parts needed. - The elastomer spring is placed in the handle, without receiving tube. This design will be preferred if the handle is smooth and robust material, other than wood, for example aluminum alloy or magnesium. - The blade is guided in rotation by friction washers located on either side of its heel and mounted on its axis. - The blade is mounted on a ball bearing to improve comfort and longevity of rotation. - The ball is hard material but other than metal, for example ceramic. - The knife has two ball lock devices, located on either side of the heel of the blade. - The lid is replaced by metal plates on which are mounted the half-sleeves. - The lid or plates of the ball lock device are made of a material that improves the friction and comfort in rotation of the blade, for example brass or beryllium bronze. - The ball is placed directly on the elastomer spring without the intermediary of an interface washer. - The elastomeric spring is of other than cylindrical shape, for example parallelepiped. - The spring is mounted on a set screw inserted in the handle. The handle is then provided with a threaded hole for this purpose. This additional device allows: o to adjust the compression force of the elastomer spring, o to easily replace the components of the locking system, namely the spring, the ball and the contact washer. The invention will be better understood and other advantages thereof will appear more clearly on reading the following description of two embodiments of a locking ball lock knife according to the invention, given only to by way of example and with reference to the appended drawings in which:
    Figure 1 is an exploded view of a knife with a ball lock device (4) according to one embodiment of the invention. - Figure 2 is a front view in section of the knife shown in Figure 1, the blade (3) being in the unfolded position out of the handle (1). - Figure 3 is a front view in section of the knife shown in Figure 1, the blade (3) being in the folded position in the handle (1). - Figure 4 is a front view in section of the knife shown in Figure 1, the blade (3) being in the intermediate position, that is to say between its folded position in the handle (1) and its unfolded position off the handle (1). - Figure 5 is a front view of the blade (3) and showing the location of the footprints (8) and (9) on the heel thereof. These impressions are intended to receive the ball (4) compressed by the spring (6). - Figure 6 is a sectional view of the heel of the blade (3) illustrated in Figure 5. This sectional view of the heel shows the detail of the footprints (8) and (9) made to receive the ball (4), - Figure 7 shows a sectional view of the ball lock device inserted into a half-handle (1) of the knife shown in Figure 1. The device consists of the ball (4) projecting inside the half handle (1), a washer (5), an elastomer spring (6) and a stainless tube (7). - Figure 8 shows the elastic deformation of the elastomer spring (6) subjected to an axial force (Fa) and which transmits a radial force (Fr). This contributes to reducing the mechanical stresses in the half-handle (1). - Figure 9 is an exploded view of a closing knife with ball lock device (4) according to a second embodiment of the invention. In this embodiment, the ball lock device is provided with a complementary adjusting screw (13). - Figure 10 is a sectional front view of the knife shown in Figure 9, the blade (3) being in the unfolded position out of the handle (1). - Figure 11 is a front view in section of the knife shown in Figure 9, the blade (3) being in the folded position in the handle (1). - Figure 12 is a front view in section of the knife shown in Figure 9, the blade (3) being in the intermediate position, that is to say between its folded position in the handle (1) and its unfolded position off the handle (1). - Figure 13 shows a sectional view of the ball lock device inserted into the handle (1) of the knife shown in Figure 9. The device consists of the ball (4) projecting inside the handle (1) , an interface washer (5), an elastomer spring (6) and an adjusting screw (13).
    The knife shown in Figure 1 comprises: - 2 longitudinal half-sleeves (1) of elongate shape and curved on the underside. Each half-handle is provided with at least one bore at the front to receive the axis (2) of the blade (3), and another bore to receive the ball lock device (4), - 3 spacers (10) for assembling the half-sleeves (1), at least one of which will serve as a stop for the blade, 1 blade (3) mounted on an axis (2) and free to rotate between an unfolded position out of the sleeve and folded in the handle, - the ball lock device consisting of at least: o a projecting locking ball (4) inside the half-handle (1), o a solid washer made of stainless material (5). ), o a cylindrical elastomer spring (6), o a guide tube made of stainless material (7), o a cover (11) made of stainless material, also serving as a friction washer to ensure a comfortable rotation of the blade .
    The ball lock device (4) housed in the half-handle (1) is dimensioned so that the ball (4) exerts sufficient force on the impression (8) or (9) made on the heel of the blade (3), when it is completely unfolded or folded. The assembly of the two half-sleeves is also provided to allow the rotation of the blade (3) around its axis (2), from its folded position to its unfolded position or vice versa, without mechanical interference between the heel of the blade ( 3) and the half-sleeves (1). The rotational movement of the blade (3) is illustrated in Figure 3 and is in the direction (Dl).
    The heel of the blade (3) is provided with indentations (8) and (9) with the particular geometry as illustrated in FIG. 6. These indentations (8) and (9), when the blade (3) is in position folded or unfolded, follow the shape of the ball (4). These impressions (8) and (9) are made by a cut-off drilling of the heel of the blade (3). The chamfer angle and depth of the impression can be adjusted to the force required to maneuver the blade when folded or unfolded. When the blade is in the unfolded position out of the handle, the impression (9) receives the ball (4), with a compressive force generated by the elastomer spring.
    When the blade is in the folded position in the handle, the impression (8) receives the ball (4), with a compressive force generated by the elastomer spring.
    In another embodiment not illustrated, the knife may comprise two ball locks (4) located in half-sleeves (1) and on either side of the heel of the blade.
    In another embodiment not illustrated, the cover (11) may be replaced by plates completely covering the inside of the half-sleeves (1).
    The knife shown in Figure 9 includes:
    A handle (1) made in one piece, elongated and curved on the bottom. This handle (1) is provided with at least one hole at the front to receive the axis (2) of the blade (3), and another bore for receiving the ball lock device (4), - A blade (3) mounted on an axis (2) and free to rotate between an unfolded position out of the handle and folded in the handle, - friction washers (12) located on either side of the heel of the blade and mounted on the axis (2) thereof. - the ball lock device consisting of at least: o a projecting locking ball (4) inside the handle (1), o a solid washer made of stainless material (5), o a cylindrical elastomer spring ( 6), o a set screw (13).
    The ball lock device (4) housed in the half-handle (1) is dimensioned so that the ball (4) exerts sufficient force on the impression (8) or (9) made on the heel of the blade (3), when it is completely unfolded or folded.
    The handle (1) is also provided with a cutout to allow rotation of the blade (3) about its axis (2), its folded position to its unfolded position or vice versa, without mechanical interference between the heel of the blade (3) and the handle (1). The rotational movement of the blade (3) is illustrated in Figure 12 and is performed in the direction (Dl).
    The heel of the blade (3) is provided with indentations (8) and (9) with the particular geometry as illustrated in FIG. 6. These indentations (8) and (9), when the blade (3) is in position folded or unfolded, follow the shape of the ball (4). These impressions (8) and (9) are made by a chamfered drilling of the heel of the blade (3). The angle of the chamfer and the depth of the impression can be adjusted to the force required to maneuver the blade when folded or unfolded.
    When the blade is in the unfolded position out of the handle, the impression (9) receives the ball (4), with a compressive force generated by the elastomer spring.
    When the blade is in the folded position in the handle, the impression (8) receives the ball (4), with a compressive force generated by the elastomer spring.
    In this embodiment illustrated in FIG. 9, the adjusting screw will have a flat end or a cup end. This adjustment screw makes it possible to adjust the force applied on the spring. In addition, in this embodiment, the ball lock device will be removable and replaceable by disassembly of this set screw.
    In another embodiment not illustrated, the knife may comprise two ball lock devices (4) located in the handle (I) and on either side of the heel of the blade (3).
    权利要求:
    Claims (13)
    [1]
    Claims]. Locking knife with ball blade locking comprising: - the handle (1), consisting of two longitudinal half-sleeves assembled by spacers (10), - at least one blade (3) mounted on an axis (2) and free in rotation between an unfolded position out of the handle (1) and a folded position inside the handle (1), - a ball lock device located in the handle (1) and consisting of: oune ball (4) protruding to the inside of a half-sleeve (1). This ball (4) is of hard and stainless material, o a washer (5) of suitable shape, intended to create a contact interface between the ball (4) and the spring (6) of elastomer, o a spring (6) elastomer cylindrical shape. The elastic deformation of this particular spring will make it possible to reduce the mechanical stresses in the half-handle by transforming part of the axial force (Fa) into radial force (Fr) as illustrated in FIG. 8, or tube (7) made of material stainless steel for receiving the spring (6) elastomer. This tube (7) is subjected to radial stresses (Fr) generated by the elastic deformation of the spring (6) of elastomer. orn a cover (11) of adapted shape and provided with a bore for the axis (2) of the blade (3) and a bore for optionally retaining the ball (4) (if the heel of the blade does not cover it not during its rotation) but leave it protruding inside the half-handle (1).
    [2]
    2. closing knife according to claim 1 but the blade (3) is mounted on an axis (2) consisting of a binding screw for adjusting the clamping of the blade (3).
    [3]
    3. Closing knife according to one of the preceding claims characterized in that the handle (1) is made in one piece, for example by molding or machining of different materials, the spacers (10) are then not necessary.
    [4]
    4. Closing knife according to one of the preceding claims characterized in that the spring (6) elastomer is placed in the handle, without receiving tube. This design will be preferred if the handle is smooth material other than wood, for example aluminum alloy or magnesium.
    [5]
    5. Closing knife according to one of the preceding claims, characterized in that the blade (3) is guided in rotation by friction washers located on either side of its heel and mounted on its axis.
    [6]
    6. closing knife according to one of the preceding claims, characterized in that the blade (3) is mounted on a ball bearing to improve rotation.
    [7]
    7. closing knife according to one of the preceding claims, characterized in that the ball (4) is of hard material but not necessarily metallic, for example ceramic.
    [8]
    8. closing knife according to one of the preceding claims characterized in that two ball lock devices are used on both sides of the heel of the blade (3) and located in the half-sleeves (1).
    [9]
    9. closing knife according to one of the preceding claims characterized in that the cover (11) is replaced by metal plates on which are mounted the half-sleeves (1). In this embodiment, the holes in the plates may not be designed to retain the balls if the heel of the blade covers them during the rotation between its open and closed position.
    [10]
    10. Locking knife according to one of the preceding claims characterized in that the cover (11) or the plates of the ball lock device are made of a material for improving the friction in rotation of the blade, for example bronze at beryllium.
    [11]
    11. Closing knife according to one of the preceding claims characterized in that the ball (4) is placed directly on the spring (6) of elastomer without the intermediary of an interface washer.
    [12]
    12. Closing knife according to one of the preceding claims characterized in that the spring (6) elastomer is of other than cylindrical shape, for example parallelepiped.
    [13]
    13. Locking knife according to one of the preceding claims characterized in that the spring is mounted on a set screw (13) inserted into the handle (l). The handle is then provided with a threaded hole for this purpose. This additional device allows: o to adjust the compression force of the elastomer spring, o to easily replace the components of the locking system, namely the spring, the ball and the contact washer.
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