LEVER ARCH FILE COMPRISING AN ELEMENT INSERTED BETWEEN THE LEVER AND THE ARCH

Description

[0001] The present invention belongs to the field of bookbinding and requisites for clipping and storage of documents, i.e. among requisites adapted for sorting and organizing documents, especially of such kind, which comprise corresponding means for inserting through appropriate openings, with which the stored documents are furnished, namely among two-part clipping assemblies, which included a stable part having at least two stable pins, as well as a pivotable part, which also includes at least two pivotable pins.

[0002] The background of the invention represents a file mechanism, which comprises a base plate having two stable pins firmly attached thereto as well as a clamping set, which is actuated by means of appropriate lever and comprises two pivotable pins, which are firmly interconnected to each other by means of an intermediate section, which is supported by a spring, and may be pivoted and pressed towards the stable pins by swiveling said lever. The purpose of the proposed invention is to assure a still greater angle between the stable pins and pivotable pins by opening the mechanism, and at the same time that the lever in the disengaged state of said pin would be placed in such a position that transposition of sheets stored in the document file would be possible, by which a reliable operation of such a mechanism would have to be assured by minimum possible modifications of the existing construction concept of such a file mechanism and if possible on the basis of incorporation of the existing base plate together with the existing clamping set at least as semi-products used in manufacturing of such products. If such a problem could be successfully re-solved, then the invention could be realized promptly and with minimum financial assets, which are otherwise required for the purposes of development and manufacturing of working tools and other manufacturing accessories.

[0003] A mechanism is described in GB 815,108, by which a pair of stable pins arranged apart from each other is foreseen on the base plate, adapted to cooperate with another pair of pivotable pins, which are interconnected via an appropriate section and together form a clamping set, which by means of appropriate bearings pivotally attached to the base plate. Besides, a cantilever is foreseen on the base plate in the form of a cutout, which is bent approximately perpendicularly with respect to the main plane of said base plate and to which a swiveling lever of an actuating handle of the document file is pivotally attached, wherein said handle is pivotally attached to a further bearing, which is available on the base plate. Said actuating handle is therefore on the one hand pivotally attached to the base plate by means of the lastly mentioned bearing, and on the other hand pivotally connected with the swiveling lever, which is pivotally attached to the cantilever and furnished with appropriate pressing means, which rests on an eccentrically shaped central portion of the intermediate section of the clamping set. Still further, there is a recess in the central area of said swiveling lever, into which an arresting element is protruding, which is intended for the purposes of maintaining the swiveling lever in each corresponding position, when the handle of the mechanism is pressed opposite to the force of said spring towards the base plate and the mechanism is closed, so that each pivotable pin is pressed towards each corresponding stable pin. Such a mechanism consists of a plurality of components and is therefore really complicated and problematic when bearing mind the reliability thereof.

[0004] One of widely known and commonly used file mechanism is described in WO 2004082961 or EP 1 606 122, respectively. This mechanism consists of a base plate, on which a pair of stable pins is available, which are firmly connected to said base plate, and moreover a pair of pivotable pins, which are interconnected by means of a rigid intermediate portion and are therefore simultaneously pivotable by an appropriate lever, which is pivotally connected to the cantilever, which is arranged in the central portion of said base plate and represents a part of said base plate or is firmly interconnected therewith.

[0005] The base plate includes appropriate reinforcing elements as well as openings adapted for attachment to each disposable file cover. Two stable pins are attached to said plate apart from each other and located in both corners of one of both longer lateral edges thereof, and their free ends are bent towards the free ends of the pivotable pins. Along the other lateral edge two pivotable pins are embedded within appropriate bearings and are interconnected by means of an intermediate portion, which is bent essentially in the form of the letter U. Said bearings are normally placed adjacent to the longitudinal edge of the base plate, while the intermediate section, by means of which said pivotable pins are interconnected, is placed towards the central portion of the base plate and extends essentially parallel to the aforementioned edge of the base plate.

[0006] Furthermore, a cantilever is foreseen approximately in the central area of the base plate, which protrudes apart from the base plate and at least approximately perpendicularly with respect to the aforementioned plane and forme at its free end and apart from the base plate a pivot joint of an appropriate lever, which is intended to control the file mechanism and pivoting the pivotable pins with regard to the base plate and the stable pins. Said lever is arranged in the vertical plane, which extends parallel to the longitudinal edges of the base plate. A roller is embedded on the lever eccentrically at a certain distance with respect to the pivot joint, and is adapted for being rolled along said intermediate portion between both pivotable pins. To this aim, said lever is formed in the shape of the letter L, wherein the longer arm is intended for actuating, on the end portion of the shorter arm said roller is embedded, and the lever is embedded in the coinciding area of said arms.

[0007] In the area of said intermediate portion, the clipping assembly is supported by a spring, which is normally available as a cantilevered bending spring. By pivoting said lever, the roller is moved along said central portion in order to either press said intermediate section towards the spring or to allow when desired that said intermediate portion is pressed by said spring in such an extent, which is determined by said roller and each disposable position of the lever, whereby said pivotable pins arc pivoted with regard to the plane of the base plate in order to be shifted towards the stable pins or away from them.

[0008] When said pivotable pins are shifted away from the pair of the stable pins, then the file mechanism is opened and the sheets are allowed to be inserted into the file or removed there-from. Thanks to the spring, the intermediate section is maintained in position apart from the base plate, and also the actuating arm is shifted away from the base plate protruding thereby into the area between the stable pin and pivotable pin, which are available on the side of the actuating arm of the lever and are held apart from each other.

[0009] By pivoting the actuating arm of the lever towards the base plate, the roller is moved along the intermediate portion between the pivotable pins, by which said intermediate portion is pressed towards the plane of the base plate in a direction opposite with respect to the force of the spring. When the roller is moved across the line, which extends perpendicularly with respect to the plane of the base plate throughout the pivot joint on the centrally arranged cantilever, then the free end of each corresponding pivotable pin is rested on the free end of each corresponding stable pin. Since the lever may be pivoted still further, such a movement involves the movement of the roller beyond said line, upon which the lever is fixed and arrested in such a state, by which the file mechanism is closed.

[0010] When bearing in mind quite practical experience of using such a mechanism, it appears to be extremely reliable and efficient, and enables quick and reliable storage of a sufficient quantity of sheets. The base plate is despite to a relatively small thickness of the raw material sufficiently rigid and also the clamping set as such is perfectly designed and enables optimum and reliable operation, and also the process of manufacturing the components including subsequently assembling them is optionally conceived and is executed in a completely automatic manner, by which the former exploitation of the solution according to EP 1 606 122 is feasible within acceptable cost limits.

[0011] The problem however arises when the user intends to transpose such stored sheets or for example to re-arrange the content of such a file or the like. In such a case, such a transposition of sheets from the area of the pivotable pins into the area of the stable pins or vice versa is generally possible, however only then, when the mechanism is closed. In order to re-arrange the stored sheet, the mechanism must be opened by shifting the pivotable pins apart from the stable pins by means of the lever, upon which the sheets are allowed to be temporarily removed from the file and appropriately re-arranged, then inserted into the file again, upon which the pivotable pins are shifted by pivoting the lever unless the mechanism is closed. By sorting the sheets in the file, such a sequence often needs to be repeated several times, which is no doubt a time consuming workload, which the users would prefer to avoid. In such a context it would be very useful, if in an opened mechanism the angle between the pivotable pins and the stable pins could be as wide as possible, since then even some thicker packages of sheets could be transposed.

[0012] A generally analogous mechanism, also consists of a base plate with stable pins firmly attached thereto as well as a centrally arranged cantilever, to which a lever is attached in an appropriate pivot joint. Again, both pivotable pins are interconnected by means of an intermediate section, which in its central portion is pressed towards the main plane of the base plate by means of an appropriate roller, which is eccentrically embedded on the lever, and at the same time said intermediate section is pressed away from the main plane of the base plate by means of a spring, which is mounted on the base plate below said central area of the intermediate section.

[0013] The purpose of such a solution is to enable transposition and re-arrangement, for example amending sequences of sheets, which are stored in the file, even if the file mechanism is opened. In such a manner even during an extensive re-arrangement there is no need for repeated opening and closing of the mechanism. In order to avoid protruding the lever into the area between each pivotable pin and the corresponding stable pin on the side of the actuating arm of the lever, a limitation means is foreseen on the base plate below the central portion of the intermediate section between the pivotable pins, by means of which pivoting of the actuating arm away from the base plate is then limited. Due to such a relatively simple modification of the base plate, namely by forming a cutout and subsequently bending the material in order to obtain said limitation means, the actuating arm of the lever is then prevented from protruding into the area between the pivotable and the stable pin, when positioned apart from each other, which would otherwise make transposition of sheets impossible. Accordingly, thanks to said limitation means the actuating arm of the lever is allowed to be pivoted only to such an extent that even in an opened mechanism, said arm is still maintained relatively close to the main plane of the base plate and at least at such distance apart from the stable pin and a corresponding pivotable pin, that transposition of sheets is still possible.

[0014] In this particular case, enabling transposition of sheets is achieved on the basis of reduction of the pivoting area of the lever. Whenever the mechanism is opened, the pivotable pin and the stable pin must be maintained at a desired distance apart from each other, and such a reduced pivoting area of the lever requires adequate amendment of the transmission ratio between the force acting on the lever and the force, by which the pivotable pins are pressed towards the stable pins. In addition to serious problems about accessing the lever in a completely full document file it is therefore obvious, that either an essentially higher force must act on the lever, or the mechanism as such must be exposed to essentially higher loads and deformations, consequently. It is also obvious, that such products are manufactured in a mass production, and must also comply with all requirements with regard to safe and reliable use, so that increasing of the force used for closing the mechanism seems generally to be unacceptable, while such increasing of deformations may lead to reducing of reliability and shortening of the normal lifetime of such products, or is even connected with other undesired measures like introducing more expensive raw materials or enlarging the dimensions of certain components, which normally leads to increasing of the weight and higher manufacturing expenses.

[0015] Still further, a file mechanism is described in WO 2005/047015, which also includes a base plate, a pair of stable pins, which are firmly connected thereto, as well as a pair of pivotable pins, which arc pivoted by means of appropriate lever. Said pivotable pins are embedded on the base plate and interconnected by means of an intermediate section, which is supported by a spring, which is mounted on said base plate. Like in previous cases, said lever is pivotally attached to a cantilever on the base plate and is adapted to cooperate with the intermediate section arranged between the pivotable pins. However in this particular case the intermediate section is adapted to cooperate not e.g. with a roller, which is eccentrically embedded on the lever, but with a circumferential border of an essentially circular and centrically embedded operational area of the lever, which is formed as a specially determined curve according to the same principle as a classic and commonly known crank shaft mechanism. Accordingly, by pivoting the lever around said pivot joint in a determined manner the distance between the pivot joint and each particular contact point on the circumference of said operating area is changed, in which the lever is cooperating with the intermediate section in order to push it towards the spring and opposite to
the force thereof. Three main angular positions of the lever are discussed in said source in more detail, namely the first position, in which the mechanism is closed and the lever is locked adjacent to the main plane of the base plate so that transposition of sheets is enabled, while in the second position thanks to appropriately determined transmission ratio the mechanism is smoothly opened or closed, whereby the lever is pivoted away from the base plate and transposition of sheets is impossible, while in the third position the lever is pivoted around the pivot point approximately 180 degrees with respect to its first position, by which the mechanism is opened and transposition of sheets is enabled again despite the fact that the mechanism is opened, since the lever is maintained again adjacent to the base plate. Also in this case a spring is mounted on the base plate, by which the intermediate section between the pivotable pins is pressed towards the circumferential border of the lever. In this solution the main problem refers to the second position of the lever, in which the lever protrudes approximately rectangular with respect to the main plane of the base plate. When the lever is positioned adjacent to the base plate, the risk of damages due to possible hooking or impacts is relatively low. On the contrary, when the lever protrudes perpendicularly with respect to the base plate, the free end of the lever is placed at a long distance apart from the base plate and also from the pivot joint, so that each loading in a transversal direction with respect to the axis of the pivot joint e.g. due to possible impacts by hand, hooking by clothes or when the file drops down to the floor may result in extremely high stresses in the area of the pivot joint, which leads to increasing of play therein or even to the destination of the mechanism. This may in particularly happen when the file is completely loaded with documents, and during pivoting the lever the user is still occupied with the sheets, which are stored in the file. Besides, in order to realize such an approach, the complete construction concept needs to be adapted thereto. This means that an appropriately designed base plate must be developed together with a corresponding clamping set and the lever furnished with an appropriate curve on the peripheral border of the operational area. This simultaneously means, that working tools and other accessories must be developed and manufactured, by which then a mass production could be organized, which however normally involves assets and occupation, by which the problem, which was exposed at the very beginning, remains completely unsolved.

[0016] The present invention refers to improvements of a known file mechanism, which is described in WO 2004082961 or EP 1 606 122, respectively, and is intensively manufactured by the applicant, who is already possessing all required manufacturing tools and other accessories, which enable a reliable mass production. Such a file mechanism consists of a base plate and a clamping set, which is pivotally attached to said base plate and is actuated by means of an actuating lever, which is also pivotally attached to said base plate. A pair of stable pins is firmly attached to the base plate adjacent to one longitudinal edge thereof and are arranged appropriately apart from each other and positioned at least approximately rectangular with respect to the main plane of said base plate. A cantilever with a pivot joint is arranged in the central area of the base plate, while adjacent to the opposite longitudinal edge appropriate bearings are situated, which are adapted for embedding the clamping set onto said base plate. Said integral clamping set comprises a pair of pivotable pins, which are adapted to cooperate with said stable pins in the sense of coaxial resting of said pivotable pins thereon and between which an intermediate section is available, which is offset towards the cantilever and is therefore embedded eccentrically with respect to said bearings and pressed away from the base plate by means of a supporting spring, and moreover, appropriate bearing sections are foreseen between said intermediate section and said pivotable pins, in the area of which said clamping set is pivotally embedded within said bearings on the base plate. The actuating lever is pivotally attached to the pivot joint on the cantilever of the base plate and extends essentially in the longitudinal direction with respect to the base plate, protruding thereby outside of the circumference of the base plate in the area of one stable pin and the corresponding pivotable pin. Said actuating lever is adapted to cooperate with the intermediate section of the clamping set, which is on the one hand pressed away from the base plate by means of the spring and on the other hand by means of the actuating lever optionally pressed towards the base plate.

[0017] In accordance with the present invention a guide is foreseen on the intermediate section, which is faced towards the actuating lever and adapted to cooperate with a segment, which is inserted between said section and the actuating lever, namely in such a manner that by pivoting said lever around its pivot joint on the cantilever of the base plate, as soon as the lever is rested onto the guide, said elongated segment having smoothly rounded end portions as well as corresponding length and thickness, may be rotated from its first position at least approximately parallel with respect to the main plane of the base plate into its second position at least approximately perpendicular with respect to the main plane of the base plate or vice versa, by which the segment is capable to take-over the loading, which is necessary for the purposes of assuring stability and rigidity of the closed file mechanism, and correspondingly, the distance between the base plate and the intermediate section of the clamping set supported by the spring is varied within the range, which corresponds to the difference between the length and the thickness of the segment. The segment is positively connected both with the actuating lever and also with the guide on the intermediate section of the clamping set, which is pressed by means of the spring in the direction away from the base plate.

[0018] The actuating lever is furnished with a seat, which is situated on the one side with respect to the pivot joint and is adapted to rest on a corresponding contact surface on the guide. Moreover, the actuating lever is furnished with a further seat, which is situated on the opposite side with respect to said pivot joint and is adapted to cooperate with the first at least approximately semicircular rounded end portion of the segment. Still further, the actuating lever comprises a protrusion, which is adapted to push and rotate said segment when the actuating lever is pivoted around its pivot joint. Besides, the actuating lever is furnished with a rest, which is adapted for pressing the actuating lever towards a corresponding contact surface of the guide, while said guide in addition to said contact surface comprises a seat, which is adapted to cooperate with the second at least approximately semicircular end portion of the segment, as well as a further contact surface, which is adapted to cooperate with the seat on the opposite side of the actuating lever with respect to the pivot joint Said seat, which is foreseen on the actuating lever and which is adapted to cooperate with the segment, is therefore arranged between the protrusion, which is intended to push and rotate the segment, and the pivot joint, while the rest on the actuating lever, which is adapted to cooperate with the guide, is then arranged at a greater distance apart from the pivot joint like the protrusion, which is intended to rotate the segment.

[0019] In the opened position of the mechanism, when the pivotable and stable pins are positioned apart from each other, due to the pressure of the spring towards the intermediate section, the guide is rested by its contact surface on the actuating lever in the area of the seat, by which the segment is positioned at least approximately parallel with respect to the base plate, so that both end portions thereof are placed at practically equal distance apart from the base plate.

[0020] In the closed position of the mechanism, when the pivotable pins are pressed towards the stable pins due to the pressure of the spring towards the intermediate section, the guide is rested by its relevant contact surface on the actuating lever in the area of the seat, by which the segment is supported in the area of one end portion by means of the relevant seat on the actuating lever and also in the area of its other end portion by means of the relevant seat on the guide, by which in such a position said seat on the actuating lever is positioned at least approximately vertical above said seat on the guide, since the segment is turned into its second position at least approximately rectangular with respect to the base plate.

[0021] In the most preferable embodiment, the seat on the actuating lever, which is adapted to cooperate with the segment, is formed as a concave cylindrical recess, while the end portion of the segment, which is adapted to cooperate with said seat, is formed as a convex cylindrical surface, by which the radius of curvature of the surface on this end portion of the segment and the radius of curvature of the surface in the area of said seat on the actuating lever are adapted to each other. Analogously, the seat on the guide, which is adapted to cooperate with the segment, is formed as a concave cylindrical recess, by which the end portion of the segment, which is adapted to cooperate with said seat, is formed as a convex cylindrical surface, by which the radius of curvature of the surface on this end portion of the segment and the radius of curvature of the surface in the area of said seat on the guide are adapted to each other.

[0022] The guide may be connected with the intermediate section of the clamping set firmly and either in a non-detachable manner or in a detachable manner.

[0023] The file mechanism according to the invention will be described on the basis of an embodiment, which is presented in accompanying drawings, wherein

Fig. 1

is a front perspective view of the file mechanism in its opened position;

Fig. 2

is a front perspective view of the file mechanism according to Fig. in its opened position, but observed under some different angle;

Fig. 3

is a front view of the same mechanism, again in its opened position;

Fig. 4

is a front view of the same mechanism, however in the closed position;

Fig. 5

is a cross-section of the mechanism along the plane V - V according to Fig. 3; and

Fig. 6

is a cross-section of the mechanism along the plane VI - VI according to Fig. 4.

[0024] A file mechanism (Fig. 1) comprises a base plate 1 with stable pins 11, 12 firmly attached thereto as well as with a cantilever 13 with an actuating lever 3 attached thereto, and moreover a clamping set 2, which consists of a pair of pivotable pins 21, 22 and an intermediate section 25, which is arranged between them.

[0025] The base plate 1 of the mechanism according to the invention essentially corresponds to those according to prior art (WO 2004082961 or EP 1 6060 122, respectively) and is furnished with corresponding reinforcing means 14, mounting openings 15 and positioning openings 16, while the stable pins 11, 12 are mounted, preferably by means of pressing or riveting, on the base plate 1 adjacent to the longitudinal edge 17. Adjacent to the opposite longitudinal edge 18 there are two bearings 19', 19", by means of which a clamping set 2 is pivotally attached to the base plate 1. Said bearings 19', 19" represent integral parts of the base plate 1 and consist of the material of the base plate 1, which is cut-out and bent in the area adjacent to said longitudinal edge 18.

[0026] Said cantilever 13 is arranged approximately in the central area of the base plate 1 and extends approximately perpendicular with respect to the main plane of the plate 1. Similar like the plate 1 itself, also the cantilever 13 is relatively rigid, so that embedding of the actuating lever 3 and consequently actuating of the clamping set 2 can be performed in a sufficiently precise manner.

[0027] Still further, a spring 10 is mounted on the base plate I by inserting thereof into an appropriate cutout 10', which is arranged between the cantilever 13 and the longitudinal edge 18, and is therefore formed and also mounted in the same manner like in the prior art mechanism (WO 2004082961 or EP 1 6060 122, respectively). Said spring 10 is intended to support an intermediate section 25 of the clamping set 2 on the base plate 1. Said spring 10 generally consists of some different material than the base plate 1 and is engaged within said cutout 10' of the base plate 1 in order to operate as a cantilevered flat bending spring.

[0028] Still further, the actuating lever 3 is pivotally attached to the cantilever 13 of the base plate 1 in an appropriate pivot joint 31 and extends in the longitudinal direction of the base plate 1 and between one stable pin 12 and corresponding pivotable pin 22 and protrudes outside from the circumference of the base plate 1.

[0029] Said clamping set may essentially correspond to the set 2 as known from the prior art (WO 200408296 or EP 1 606 122), but is for the purposes of the present invention modified by adding a guide 26 to the intermediate section 25, which is adapted to cooperate both with the actuating lever 3 and also with an intermediate segment 4, which is inserted between the actuating lever 3 and the guide 26 on the intermediate section 25 of the clamping set 2. Regarding the embodiment as shown, said guide 26 consists of a polymeric material and is either directly formed on the intermediate section 25 by means of injection moulding, or may also be separately manufactured and subsequently attached to said intermediate section 25.

[0030] In this particular embodiment, the intermediate segment 4 is formed as an elongated integral part having smoothly rounded end portions 41, 42 characterized by the length L and the thickness B, which is capable of rotating at least approximately 90° inserted between the lever 3 and said guide 26 of the clamping set 2.

[0031] In order to enable appropriate guiding of said segment 4, said lever 3 is furnished - when observed in the longitudinal direction thereof - with a seat 32, which is arranged on the one side 351 of the pivot joint 31 and is adapted to receive a corresponding end portion 41 of the segment 4, as well as with a protrusion 33, which is adapted to transpose the segment 4 during pivoting the lever 3 around the pivot joint 31 on the cantilever 3, and moreover also with a rest 34, by which the lever 3 is pressed towards the corresponding surface 263 of the guide 26 on the intermediate section 25 of the clamping set 2. A seat 36 is foreseen on the opposite side 352 of the lever 3 with respect to the pivot joint 31, by means of which the lever 3 may be rested on the guide 26. Of the same reason i.e. in order to enable guiding said segment 4, the guide 26 on the intermediate section 25 is also furnished with a seat 261, which is adapted to receive the belonging rounded end portion 42 of the segment 4, and moreover also with a contact surface 262, which is adapted to cooperate with a rest 34 of the lever 3, and besides, with a contact surface 263, which is adapted to cooperate with the seat 36 of the lever 3. Accordingly, said segment 4 is therefore positively inserted between the lever 3 and the guide 26 in such a manner, that on the one hand it rests by its one end portion 41 against the lever 3 in the area of the seat 32 thereon, and on the other hand by its another end portion 42 it rests against the guide 26 in the area of the seat 261 thereon.

[0032] As already mentioned, the intermediate section 25, embedded eccentrically with respect to the bearings 19', 19", is supported by the spring 10 and is therefore pressed away from the base plate 1, by which the pins 11, 12; 21, 22 are maintained apart from each other. Whenever the mechanism is opened and said pins 11,12; 21, 22 are maintained apart from each other, then the lever 2 is pivoted around the pivot joint 31 array from the base plate 2 and the seat 36 of the lever 3 is rested on the contact surface 263 of the guide 26 on the intermediate section 25 of the clamping set 2.

[0033] When the lever 3 is pressed towards the base plate 1, said resting of the seat 36 of the lever 3 on the contact surface 263 of the guide 26 is terminated, and instead of that the lever 3 is pressed by means of its rest 34 towards the contact surface 262 of the guide 26 by simultaneously pressing the guide 25 together with the intermediate section 25 of the clamping set 2 towards the base plate 1 and therefore opposite with respect to the force of the spring 10. When the lever 3 is moved i.e. pivoted around the pivot joint 31, said protrusion 33 of the lever 3 pushes the corresponding end portion 41 of the segment 4, which is by means of the opposite end portion 42 rested on the seat 261 on the guide 26, so that by pivoting the lever 3 the segment 4 is both moving and rotating. Thanks to said elongated shape of the segment 4 characterized by the length L and the thickness B, the segment 4 is by pivoting the handle 3 turned and transposed from its original position essentially parallel with respect to the main plane of the base plate 1 into another position at least approximately perpendicular with respect to the main plane of the base plate 1, by which the intermediate section 25 of the clamping set 2 is moved towards the base plate 1 and against the force of the spring 10 along the distance, which normally corresponds to the difference between the length L and thickness B of the segment 4 and therefore to the value (L - B). If the segment is rotates lightly more than 90°, it is then locked in such position, by which also pivoting the lever 3 in its opposite direction is prevented, which should otherwise occur due to the action of the spring 10 towards the intermediate section 25 of the clamping set 2. In such a state (Fig. 4 and 6) the mechanism is closed, and pivotable pins 21, 22 are pressed towards the stable pins 11, 12, and the lever is maintained adjacent to the base plate 1. The degree of locking the segment 4 in the previously described position, and herewith also the intensity of maintaining the lever 3 in such a closed position of mechanism, is determined by the angle of turning the segment 4 over the critical angle of 90°.

[0034] When the lever 3 is pressed in the direction away from the base plate 1, then the lever 3 is sufficiently pivoted to enable the segment 4 to be rotated back into its original position (Figs. 1 to 3 and 5) thanks to the spring 10.

Claims

1. File mechanism, consisting of a base plate (1) and a clamping set (2), which is pivotally attached to said base plate (1) and is actuated by means of an actuating lever (3), which is also pivotally attached to said base plate (1), whereby a pair of stable pins (11, 12) are firmly attached to said base plate (1) adjacent to one longitudinal edge (17) thereof, and are arranged appropriately apart from each other and positioned at least approximately rectangular with respect to the main plane of said base plate (1), and whereby a cantilever (13) with a pivot joint (31) is arranged in the central area of the base plate (1), while adjacent to the opposite longitudinal edge (18) appropriate bearings (19', 19") are arranged, which are adapted for embedding the clamping set (2) onto the base plate (1), and whereby said integral clamping set (2) comprises a pair of pivotable pins (21, 22), which are adapted to cooperate with said stable pins (11, 12) in the sense of coaxial resting of said pivotable pins (21, 22) thereon and between which an intermediate section (25) is available, which is offset towards the cantilever (13) and is therefore embedded eccentrically with respect to said bearings (19', 19") and pressed away from the base plate (1) by means of a supporting spring (10), and whereby appropriate bearing sections (23, 24) are foreseen between said intermediate section (25) and said pivotable pins (21, 22), in the area of which said clamping set (2) is pivotally embedded within said bearings (19', 19") on the base plate (1), whilst the actuating lever (3) is pivotally attached to the pivot joint (31) on the cantilever (13) of the base plate (1) and extends essentially in the longitudinal direction with respect to the base plate (1), protruding thereby outside of the circumference of the base plate (1) in the area of one stable pin (11) and corresponding pivotable pin (21), by which said actuating lever (3) is adapted to cooperate with the intermediate section (25) of the clamping set (2), which is on the one hand pressed away from the base plate (1) by means of the spring (10) and on the other hand by means of the actuating lever (3) optionally pressed towards the base plate (1),
wherein a guide (26) is foreseen on the intermediate section (25), which is faced towards the actuating lever (3) and is adapted to cooperate with a segment (4), which is inserted between said section (25) and the actuating lever (3), namely in such a manner that by pivoting said lever (3) around its pivot joint (31) on the cantilever (13) of the base plate (1), as soon as the lever (3) is rested onto the guide (26), said elongated segment (4) having smoothly rounded end portions (41, 42) as well as corresponding length (L) and thickness (B) may be rotated from the first position at least approximately parallel with respect to the main plane of the base plate (1) into another position at least approximately perpendicular with respect to the main plane of the base plate (1) or vice versa, by which the segment (4) is capable to take-over the loading, which is necessary for the purposes of assuring stability and rigidity of the closed file mechanism, and correspondingly, the distance between the base plate (1) and the intermediate section (25) of the clamping set (2) supported by the spring (10) is varied within the range, which corresponds to the difference between the length (L) and the thickness (B) of the segment (4),
characterized in that
said segment (4) is positively connected both with the actuating lever (3) and also with the guide (26) on the intermediate section (25) of the clamping set (2), which is pressed by means of the spring (10) in the direction away from the base plate (1), and in that
the actuating lover (3) is furnished wit a scat (36), which is situated on the one side with respect to the pivot joint (31) and is adapted to rest on a corresponding contact surface (263) on the guide (26), as well as with a seat (32), which is situated on the opposite side with respect to said pivot joint (31) and is adapted to cooperate with the first at least approximately semicircular rounded end portion (41) of the segment (4), and moreover with a protrusion (33), which is adapted to push and rotate said segment (4) when the actuating lever (3) is pivoted around its pivot joint (31), and moreover also with a rest (34) adapted for pressing the actuating lever (3) towards a corresponding contact surface (262) of the guide (26), while said guide in addition to said contact surface (262) comprises a seat (261), which is adapted to cooperate with the second at least approximately semicircular end portion (42) of the segment (4), as well as a further contact surface (263), which is adapted to cooperate with the seat (36) on the opposite side of the actuating lever (3) with respect to the pivot joint (31).

2. File mechanism according to Claim 1, characterized in that the seat (32) is foreseen on the actuating lever (3), which is adapted to cooperate with segment (4) and arranged between the protrusion (33), which is intended to push and rotate the segment (4), and the pivot joint (31), and that the rest (34) on the actuating lever (3), which is adapted to cooperate with the guide (26), is arranged at a greater distance apart from the pivot joint (31) like the protrusion (33), which is intended to rotate the segment (4).

3. File mechanism according to Claims 1 and 2, characterized in that in the opened position of the mechanism, when the pivotable and stable pins (11, 12; 21, 22) are positioned apart from each other, due to the pressure of the spring (10) towards the intermediate section (25), the guide (26) is rested by its contact surface (263) on the actuating lever (3) in the area of seat (36), by which the segment (4) is positioned at least approximately parallel with respect to the base plate (1), so that both end portions (41, 42) thereof are placed at practically equal distance apart from the base plate (1).

4. File mechanism according to Claims 1 and 2, characterized in that in the closed position of the mechanism, when the pivotable pins (21, 22) are pressed towards the stable pins (11, 12) due to the pressure of the spring (10) towards the intermediate section (25), the guide (26) is rested by its contact surface (262) on the actuating lever (3) in the area of the seat (34), by which the segment (4) is supported in the area of one end portion (41) by means of the seat (32) on the actuating lever (3) and in the area of the other end portion (42) by means of the seat (261) on the guide (26), by which in such a position the seat (32) on the actuating lever (3) is positioned at least approximately vertical above said seat (261) on the guide (26), whereby the segment (4) is turned into position at least approximately rectangular with respect to the base plate (1).

5. File mechanism according to one of Claims 1-4, characterized in that the seat (32) on the actuating lever (3), which is adapted to cooperate with the segment (4), is formed as a concave cylindrical recess, and that the end portion (41) of the segment (4), which is adapted to cooperate with said seat (32), is formed as a convex cylindrical surface, by which the radius of curvature of the surface on this end portion (41) of the segment (4) and the radius of curvature of the surface in the area of said seat (32) on the actuating lever (3) are adapted to each other.

6. File mechanism according to one of Claims 1-4, characterized in that the seat (261) on the guide (26), which is adapted to cooperate with the segment (4), is formed as a concave cylindrical recess, and that the end portion (42) of the segment (4), which is adapted to cooperate with said seat (261), is formed as a convex cylindrical surface, by which the radius of curvature of the surface on this end portion (42) of the segment (4) and the radius of curvature of the surface in the area of said seat (261) on the guide (26) are adapted to each other.

Ansprüche

1. Ordnermechanik, bestehend aus einer Grundplatte (1) und einer Einhängevorrichtung (2), welche schwenkbar an der Grundplatte (1) angebracht ist und mittels eines ebenfalls schwenkbar an der Grundplatte (1) angebrachten Betätigungshebels (3) betätigt wird, wobei ein Paar Aufreihstifte (11, 12) fest an der Grundplatte (1) angrenzend an eine Längskante (17) davon angebracht ist und passend voneinander entfernt angeordnet ist und zumindest ungefähr rechtwinklig zur Hauptebene der Grundplatte (1) positioniert ist, und wobei ein vorspringender Träger (13) mit einem Drehgelenk (31) im mittleren Bereich der Grundplatte (1) angeordnet ist, während angrenzend an die gegenüberliegende Längskante (18) entsprechende Lager (19', 19") angeordnet sind, welche an das Einbringen der Einhängevorrichtung (2) auf der Grundplatte (1) angepasst sind, und wobei die einstückige Einhängevorrichtung (2) ein Paar schwenkbarer Stifte (21, 22) umfasst, welche angepasst sind an das Zusammenwirken mit den Aufreihstiften (11, 12) im Sinne des koaxialen Anliegens der schwenkbaren Stifte (21, 22) daran und zwischen welchen ein Zwischenabschnitt (25) zur Verfügung steht, welcher zum vorspringenden Träger (13) hin versetzt ist und demzufolge außermittig zu den Lagern (19', 19") eingebracht ist und mittels einer Stützfeder (10) von der Grundplatte (1) fort gedrückt ist, und wobei geeignete Lagerabschnitte (23, 24) zwischen dem Zwischenabschnitt (25) und den schwenkbaren Stiften (21, 22) vorgesehen sind, in deren Bereich die Einhängevorrichtung (2) schwenkbar in den Lagern (19', 19") auf der Grundplatte (1) eingebracht ist, während der Betätigungshebel (3) schwenkbar an dem Drehgelenk (31) auf dem vorspringenden Träger (13) der Grundplatte (1) angebracht ist und sich im Wesentlichen in Längsrichtung bezogen auf die Grundplatte (1) erstreckt, wobei er außerhalb des Umfangs der Grundplatte (1) im Bereich eines Aufreihstifts (11) und des entspechenden schwenkbaren Stifts (21) hervorsteht, wobei der Betätigungshebel (3) an das Zusammenwirken mit dem Zwischenabschnitt (25) der Einhängevorrichtung (2) angepasst ist, welcher einerseits mittels der Feder (10) von der Grundplatte (1) fort gedrückt ist und andererseits mittels des Betätigungshebels (3) gegebenenfalls zu der Grundplatte (1) hin gedrückt ist,
wobei eine Führung (26) auf dem Zwischenabschnitt (25) vorgesehen ist, welche dem Betätigungshebel (3) zugewandt ist und an das Zusammenwirken mit einem Segment (4) angepasst ist, welches zwischen dem Abschnitt (25) und dem Betätigungshebel (3) nämlich derart eingeführt ist, dass durch Schwenken des Hebels (3) um dessen Drehgelenk (31) auf dem vorspringenden Träger (13) der Grundplatte (1), sobald der Hebel (3) auf der Führung (26) anliegt, das längliche Segment (4), welches glatt gerundete Endabschnitte (41, 42) sowie die entsprechende Länge (L) und Dicke (B) aufweist, von der ersten Position zumindest ungefähr parallel zur Hauptebene der Grundplatte (1) in eine zumindest ungefähr senkrecht zur Hauptebene der Grundplatte (1) verlaufende andere Position gedreht werden kann oder umgekehrt, wobei das Segment (4) die für die Zwecke der Sicherstellung der Stabilität und Steifigkeit der geschlossenen Ordnermechanik erforderliche Belastung übernehmen kann und demgemäß der Abstand zwischen der Grundplatte (1) und dem von der Feder (10) getragenen Zwischenabschnitt (25) der Einhängevorrichtung (2) innerhalb des Bereichs verändert wird, welcher der Differenz zwischen der Länge (L) und der Dicke (B) des Segments (4) entspricht,
dadurch gekennzeichnet, dass
das Segment (4) formschlüssig sowohl mit dem Betätigungshebel (3) als auch mit der Führung (26) auf dem Zwischenabschnitt (25) der Einhängevorrichtung (2) verbunden ist, welcher mittels der Feder (10) in die fort von der Grundplatte (1) verlaufende Richtung gedrückt ist,
und dass
der Betätigungshebel (3) versehen ist mit einer Anlagefläche (36), welche auf der einen Seite bezogen auf das Drehgelenk (31) angeordnet ist und an das Anliegen auf einer entsprechenden Kontaktfläche (263) auf der Führung (26) angepasst ist, sowie mit einer Anlagefläche (32), welche auf der gegenüberliegenden Seite bezogen auf das Drehgelenk (31) angeordnet ist und an das Zusammenwirken mit dem ersten zumindest ungefähr halbkreisförmigen gerundeten Endabschnitt (41) des Segments (4) angepasst ist, und ferner mit einem Vorsprung (33), welcher an das Schieben und Drehen des Segments (4) angepasst ist, wenn der Betätigungshebel (3) um sein Drehgelenk (31) geschwenkt wird, und ferner auch mit einer Auflage (34), die an das Drücken des Betätigungshebels (3) in Richtung einer entsprechenden Kontaktfläche (262) der Führung (26) angepasst ist, während die Führung zusätzlich zu der Kontaktfläche (262) eine an das Zusammenwirken mit dem zweiten zumindest ungefähr halbkreisförmigen Endabschnitt (42) des Segments (4) angepasste Anlagefläche (261) sowie eine weitere an das Zusammenwirken mit der Anlagefläche (36) auf der gegenüberliegenden Seite des Betätigungshebels (3) bezogen auf das Drehgelenk (31) angepasste Kontaktfläche (263) umfasst.

2. Ordnermechanik nach Anspruch 1, dadurch gekennzeichnet, dass die Anlagefläche (32) auf dem Betätigungshebel (3) vorgesehen ist, welche an das Zusammenwirken mit dem Segment (4) angepasst ist und zwischen dem Vorsprung (33), welcher das Segment (4) schieben und drehen soll, und dem Drehgelenk (31) angeordnet ist, und dass die an das Zusammenwirken mit der Führung (26) angepasste Auflage (34) auf dem Betätigungshebel (3) in einem größeren Abstand von dem Drehgelenk (31) als der Vorsprung (33) angeordnet ist, welcher das Segment (4) drehen soll.

3. Ordnermechanik nach Anspruch 1 und 2, dadurch gekennzeichnet, dass in der geöffneten Position der Mechanik, wenn die schwenkbaren Stifte und die Aufreihstifte (11, 12; 21, 22) wegen des Drucks der Feder (10) in Richtung des Zwischenabschnitts (25) voneinander entfernt positioniert sind, die Führung (26) durch ihre Kontaktfläche (263) koaxial auf dem Betätigungshebel (3) im Bereich der Anlagefläche (36) anliegt, wobei das Segment (4) zumindest ungefähr parallel zur Grundplatte (1) derart positioniert ist, dass beide Endabschnitte (41, 42) davon in nahezu gleichem Abstand entfernt von der Grundplatte (1) positioniert sind.

4. Ordnermechanik nach Anspruch 1 und 2, dadurch gekennzeichnet, dass in der geschlossenen Position der Mechanik, wenn die schwenkbaren Stifte (21, 22) wegen des Drucks der Feder (10) in Richtung des Zwischenabschnitts (25) zu den Aufreihstiften (11, 12) hin gedrückt sind, die Führung (26) durch ihre Kontaktfläche (262) auf dem Betätigungshebel (3) im Bereich der Anlagefläche (34) anliegt, wobei das Segment (4) im Bereich eines Endabschnitts (41) mittels der Anlagefläche (32) auf dem Betätigungshebel (3) und im Bereich des anderen Endabschnitts (42) mittels der Anlagefläche (261) auf der Führung (26) getragen ist, wobei die Anlagefläche (32) auf dem Betätigungshebel (3) bei einer solchen Position zumindest ungefähr vertikal über der Anlagefläche (261) auf der Führung (26) positioniert ist, wobei das Segment (4) in eine Position gedreht wird, die zumindest ungefähr rechtwinklig zur Grundplatte (1) ist.

5. Ordnermechanik nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass die an das Zusammenwirken mit dem Segment (4) angepasste Anlagefläche (32) auf dem Betätigungshebel (3) als konkave zylindrische Aussparung ausgebildet ist und dass der an das Zusammenwirken mit der Anlagefläche (32) angepasste Endabschnitt (41) des Segments (4) als konvexe zylindrische Oberfläche ausgebildet ist, wobei der Radius der Krümmung der Oberfläche auf diesem Endabschnitt (41) des Segments (4) und der Radius der Krümmung der Oberfläche im Bereich der Anlagefläche (32) auf dem Betätigungshebel (3) aneinander angepasst sind.

6. Ordnermechanik nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass die an das Zusammenwirken mit dem Segment (4) angepasste Anlagefläche (261) auf der Führung (26) als konkave zylindrische Aussparung ausgebildet ist und dass der an das Zusammenwirken mit der Anlagefläche (261) angepasste Endabschnitt (42) des Segments (4) als konvexe zylindrische Oberfläche ausgebildet ist, wobei der Radius der Krümmung der Oberfläche auf diesem Endabschnitt (42) des Segments (4) und der Radius der Krümmung der Oberfläche im Bereich der Anlagefläche (261) auf der Führung (26) aneinander angepasst sind.

Revendications

1. Mécanisme pour classeur, consistant en une plaque de base (1) et un ensemble de fixation (2), qui est attaché de façon pivotante sur ladite plaque de base (1) et est actionné au moyen d'un levier d'actionnement (3), qui est également attaché de façon pivotante sur ladite plaque de base (1), dans lequel une paire de broches fixes (11, 12) sont fermement attachées sur ladite plaque de base (1) de façon adjacente à un bord longitudinal (17) de celle-ci, et sont agencées espacées de façon appropriée l'une de l'autre et positionnées au moins approximativement à angle droit par rapport au plan principal de ladite plaque de base (1), et dans lequel un porte-à-faux (13) avec une articulation à pivot (31) est agencé dans la zone centrale de la plaque de base (1), tandis que, de façon adjacente au bord longitudinal opposé (18), des supports (19', 19") appropriés sont agencés, qui sont adaptés à une intégration de l'ensemble de fixation (2) sur la plaque de base (1), et dans lequel ledit ensemble de fixation (2) intégré comprend une paire de broches pivotantes (21, 22), qui sont adaptées à coopérer avec lesdites broches fixes (11, 12) dans le sens d'un repos coaxial desdites broches pivotantes (21, 22) sur celles-ci et entre lesquelles une section intermédiaire (25) est disponible, qui est décalée vers le porte-à-faux (13) et est donc intégrée de façon excentrique par rapport auxdits supports (19', 19") et est pressée à l'opposée de la plaque de base (1) au moyen d'un ressort support (10), et dans lequel des sections support (23, 24) appropriées sont prévues entre ladite section intermédiaire (25) et lesdites broches pivotantes (21, 22), dans la zone desquelles ledit ensemble de fixation (2) est intégré de façon pivotante à l'intérieur desdits supports (19', 19") sur la plaque de base (1), tandis que le levier d'actionnement (3) est attaché de façon pivotante sur l'articulation à pivot (31) sur le porte-à-faux (13) de la plaque de base (1) et s'étend essentiellement dans le sens longitudinal par rapport à la plaque de base (1), faisant ainsi saillie à l'extérieur de la circonférence de la plaque de base (1) dans la zone d'une broche fixe (11) et d'une broche pivotante (21) correspondante, ce par quoi ledit levier d'actionnement (3) est adapté à coopérer avec la section intermédiaire (25) de l'ensemble de fixation (2), qui est d'une part pressée à l'opposé de la plaque de base (1) au moyen du ressort (10) et d'autre part au moyen du levier d'actionnement (3) facultativement pressé vers la plaque de base (1),
dans lequel un guide (26) est prévu sur la section intermédiaire (25), qui fait face vers le levier d'actionnement (3) et est adapté à coopérer avec un segment (4), qui est inséré entre ladite section (25) et le levier d'actionnement (3), à savoir de telle manière qu'en faisant pivoter ledit levier (3) autour de son articulation à pivot (31) sur le porte-à-faux (13) de la plaque de base (1), dès que le levier (3) repose sur le guide (26), ledit segment (4) allongé ayant des parties d'extrémités (41, 42) doucement arrondies ainsi qu'une longueur (L) et une épaisseur (B) correspondantes peut être fait tourner de la première position au moins approximativement parallèle par rapport au plan principal de la plaque de base (1) jusqu'à une autre position au moins approximativement perpendiculaire par rapport au plan principal de la plaque de base (1) ou vice-versa, ce par quoi le segment (4) est apte à prendre la charge, qui est nécessaire aux fins d'assurer la stabilité et la rigidité du mécanisme de classeur fermé, et de façon correspondante, la distance entre la plaque de base (1) et la section intermédiaire (25) de l'ensemble de fixation (2) supporté par le ressort (10) est fait varier au sein de la plage qui correspond à la différence entre la longueur (L) et l'épaisseur (B) du segment (4),
caractérisé en ce que
ledit segment (4) est connecté positivement à la fois avec le levier d'actionnement (3) et aussi avec le guide (26) sur la section intermédiaire (25) de l'ensemble de fixation (2), qui est pressé au moyen du ressort (10) dans le sens opposé à la plaque de base (1),
et en ce que
le levier d'actionnement (3) est doté d'un siège (36), qui est situé sur un côté par rapport à l'articulation à pivot (31) et est adapté à reposer sur une surface de contact (263) correspondante sur le guide (26), ainsi que d'un siège (32), qui est situé sur le côté opposé par rapport à ladite articulation à pivot (31) et est adapté à coopérer avec la première partie d'extrémité arrondie (41) au moins approximativement semi-circulaire du segment (4), et de plus d'une saillie (33), qui est adaptée à pousser et faire tourner ledit segment (4) lorsque le levier d'actionnement (3) est fait pivoter autour de son articulation à pivot (31), et de plus également d'un repos (34) adapté à presser le levier d'actionnement (3) vers une surface de contact (262) correspondante du guide (26), tandis que ledit guide, outre ladite surface de contact (262), comprend un siège (261), qui est adapté à coopérer avec la deuxième partie d'extrémité (42) au moins approximativement semi-circulaire du segment (4), ainsi qu'une autre surface de contact (263), qui est adapté à coopérer avec le siège (36) sur le côté opposé du levier d'actionnement (3) par rapport à l'articulation à pivot (31).

2. Mécanisme pour classeur selon la revendication 1, caractérisé en ce que le siège (32) est prévu sur le levier d'actionnement (3), qui est adapté à coopérer avec le segment (4) et agencé entre la saillie (33), qui est destinée à pousser et faire tourner le segment (4), et l'articulation à pivot (31), et en ce que le repos (34) sur le levier d'actionnement (3), qui est adapté à coopérer avec le guide (26), est agencé à une distance plus grande de l'articulation à pivot (31) que la saillie (33), qui est destinée à faire tourner le segment (4).

3. Mécanisme pour classeur selon les revendications 1 et 2, caractérisé en ce que, dans la position ouverte du mécanisme, lorsque les broches pivotantes et fixes (11, 12 ; 21, 22) sont positionnées espacées les unes des autres, du fait de la pression du ressort (10) vers la section intermédiaire (25), le guide (26) repose par sa surface de contact (263) sur le levier d'actionnement (3) dans la zone de siège (36), ce par quoi le segment (4) est positionné au moins approximativement parallèle par rapport à la plaque de base (1), de telle sorte que les deux parties d'extrémité (41, 42) de celui-ci sont placées à distance pratiquement égale de la plaque de base (1).

4. Mécanisme pour classeur selon les revendications 1 et 2, caractérisé en ce que, dans la position fermée du mécanisme, lorsque les broches pivotantes (21, 22) sont pressées vers les broches fixes (11, 12) du fait de la pression du ressort (10) vers la section intermédiaire (25), le guide (26) repose par sa surface de contact (262) sur le levier d'actionnement (3) dans la zone du siège (34), ce par quoi le segment (4) est supporté dans la zone d'une partie d'extrémité (41) au moyen du siège (32) sur le levier d'actionnement (3) et dans la zone de l'autre partie d'extrémité (42) au moyen du siège (261) sur le guide (26), ce par quoi, dans une telle position, le siège (32) sur le levier d'actionnement (3) est positionné au moins approximativement vertical au-dessus dudit siège (261) sur le guide (26), d'où il résulte que le segment (4) est tourné en position au moins approximativement à angle droit par rapport à la plaque de base (1).

5. Mécanisme pour classeur selon l'une des revendications 1 à 4, caractérisé en ce que le siège (32) sur le levier d'actionnement (3), qui est adapté à coopérer avec le segment (4), est formé comme un renfoncement cylindrique concave, et en ce que la partie d'extrémité (41) du segment (4), qui est adaptée à coopérer avec ledit siège (32), est formée comme une surface cylindrique convexe, ce par quoi le rayon de courbure de la surface sur cette partie d'extrémité (41) du segment (4) et le rayon de courbure de la surface dans la zone dudit siège (32) sur le levier d'actionnement (3) sont adaptés l'un à l'autre.

6. Mécanisme pour classeur selon l'une des revendications 1 à 4, caractérisé en ce que le siège (261) sur le guide (26), qui est adapté à coopérer avec le segment (4), est formé comme un renfoncement cylindrique concave, et en ce que la partie d'extrémité (42) du segment (4), qui est adaptée à coopérer avec ledit siège (261), est formée comme une surface cylindrique convexe, ce par quoi le rayon de courbure de la surface sur cette partie d'extrémité (42) du segment (4) et le rayon de courbure de la surface dans la zone dudit siège (261) sur le guide (26) sont adaptés l'un à l'autre.

Drawing