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EP1371455B1 - Dispositif d'accouplement pour verrouiller une connexion à fiches d'un outil - Google Patents

Dispositif d'accouplement pour verrouiller une connexion à fiches d'un outil Download PDF

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Publication number
EP1371455B1
EP1371455B1 EP03013057A EP03013057A EP1371455B1 EP 1371455 B1 EP1371455 B1 EP 1371455B1 EP 03013057 A EP03013057 A EP 03013057A EP 03013057 A EP03013057 A EP 03013057A EP 1371455 B1 EP1371455 B1 EP 1371455B1
Authority
EP
European Patent Office
Prior art keywords
ball
coupling device
actuating member
cam surface
transverse bore
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.)
Expired - Lifetime
Application number
EP03013057A
Other languages
German (de)
English (en)
Other versions
EP1371455A2 (fr
EP1371455A3 (fr
Inventor
Wilhelm Joachim
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.)
Stahlwille Eduard Wille GmbH and Co KG
Original Assignee
Eduard Wille GmbH and Co KG
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 Eduard Wille GmbH and Co KG filed Critical Eduard Wille GmbH and Co KG
Publication of EP1371455A2 publication Critical patent/EP1371455A2/fr
Publication of EP1371455A3 publication Critical patent/EP1371455A3/fr
Application granted granted Critical
Publication of EP1371455B1 publication Critical patent/EP1371455B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/59—Manually releaseable latch type
    • Y10T403/591—Manually releaseable latch type having operating mechanism
    • Y10T403/592—Ball detent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/59—Manually releaseable latch type
    • Y10T403/599—Spring biased manipulator

Definitions

  • the invention relates to a coupling device for locking connectors, in particular in tools, which is triggered by actuation of a trigger member, so that the connector is easily detachable, according to the preamble of claim 1.
  • Such a coupling device gelt for example from the US 5813296 out.
  • a polygon and a polygonal recording A typical example of this is the attachment of an adapted to the shape of the respective screw or nut socket insert or attaching an extension to a ratchet.
  • Other applications are the attachment of a transverse handle, a transition part, a plug-in handle, a universal joint, a hinge handle, a crank or a T-jointed wrench. Pure connectors are unsafe and can easily come off. Therefore, coupling devices with locking balls or other locking mechanisms are provided, which hold together the parts of the connector, ie polygon and polygonal recording.
  • a tool such as a ratchet has a square, which gradually rotated by reciprocating a handle lever via a ratchet mechanism is.
  • a socket wrench ie a tool part with an adapted to the screw or nut to be rotated shape.
  • This socket can be removed to fit the screw or nut and replaced with another of a different shape.
  • the socket is secured by a detent ball.
  • the detent ball can be easily pressed against a spring force when pulling inwards. This is often a significant force required, as well as larger and thus heavier sockets must be securely held on the square. Since often the screw or nut can not be reached with the normal tool, extensions or connecting tools, eg cardan joints or transition pieces are required.
  • Such connectors usually have a spring-loaded ball on the square, which engages in a corresponding recess of a plugged onto the square socket wrench insert o. The like. And this holds in the axial direction on the square.
  • a release button is pressed. This moves a mechanism that allows the ball to be pushed into the square. The connection can then be released by slightly removing the socket wrench from the tool.
  • the DE 201 19 262 U1 shows such a connector with quick release.
  • a polygon On a main body a polygon is provided.
  • the polygon has a radial bore in one of the edge surfaces.
  • a rod In a longitudinal channel of the polygon a rod is arranged, which has a recess.
  • the ball can be partially absorbed by the recess. It is then completely sunk in the polygon.
  • the rod is rotatable by a trigger member about its axis between two rotational positions. In one rotational position, the ball is pressed in the bore radially outward, so that it causes a locking of the two parts of the connector. In the other rotational position, the recess is aligned with the bore, so that the ball can dodge and does not hinder the pulling apart of the connector.
  • the EP 0 747 174 B1 describes a plug connection for a socket wrench extension.
  • a slider In a longitudinal channel of a polygon a slider is movably guided. The longitudinal channel communicates with a transverse bore. There is a ball in the cross hole.
  • the slider has a recess which is able to receive the ball in a position of the slider.
  • the slide is under the influence of a spring and can be moved by a guided in another transverse bore knob on an inclined surface against the action of the spring in a position in which the ball is received by the recess.
  • the EP 0 861 140 B1 describes a quickly releasable coupling device in which in a longitudinal bore of a polygonal a slider is guided, which is axially displaceable by a pivotally mounted knob against the action of a spring.
  • the slider has a portion of smaller diameter. This section is able to receive a seated in a transverse bore ball in a position of the slide, whereby the lock is released. This arrangement is constructive and manufacturing technology very expensive.
  • a longitudinal channel of the polygon contains a series of balls, the last of which sits in a radial section of this channel.
  • the balls are supported on a spring-loaded release button, so that the last ball protrudes beyond the surface of the polygon.
  • By depressing the trigger button enters a circumferential groove of the release button in the region of the balls, so that they can dodge axially and the last ball deflects radially.
  • the DE 197 44 865 C2 relates to a tubular socket wrench extension.
  • the socket wrench extension has a square at one end and a square socket at the opposite end.
  • Central through the tubular Socket extension extends a rod which is guided in a longitudinal channel of the square.
  • the rod has a tapered end in the longitudinal channel.
  • a ball In a transverse bore sits a ball, which is pressed by the tapered end radially outward for locking, for example, a socket wrench when the rod is moved in the direction of the square.
  • the rod is under the influence of a spring, which strives to move the rod towards the square socket.
  • the DE 197 58 493 C2 shows a socket wrench extension with a control body, which is guided displaceably in a longitudinal bore of a polygon.
  • the actuator body has a cylindrical basic shape with a conically tapered end within the longitudinal channel.
  • a seated in a transverse bore ball can be pressed by the conical end of the actuator radially outward.
  • the other end of the actuating body is formed by a head with a plane surface.
  • a spring pushes the adjusting body away from the ball out of the polygon.
  • the actuator can be pushed by a rotatably mounted cam against the spring action and then pushes over the conical end of the ball in a locked position.
  • the US 5,813,296 describes a plug connection for a socket wrench extension.
  • the socket wrench extension consists of a shaft which has a square socket for receiving a tool at one end and tapers at the opposite end to a coupling device which is provided for receiving a corresponding socket wrench attachment.
  • the coupling device consists of a square, which has a longitudinal and a transverse bore. The longitudinal bore extends into the shaft. The transverse bore receives a so-called.
  • Detent ball which is in contact with a cylindrical actuator body with conical ends, which is located in the longitudinal bore.
  • In the shaft is transverse to the longitudinal bore a blind hole, which receives a so-called. Transfer ball.
  • a movable sleeve surrounds the shaft at the transition to the square socket.
  • there is a spring In the back of the sleeve, there is a spring.
  • the sleeve In the area of the blind hole, the sleeve has a bevel on the inside.
  • the invention has for its object to build a coupling device for locking connectors with easy to manufacture and therefore cost-effective components.
  • the trigger member is a rotary body with a cam surface, wherein the actuating body rests with its tapered second end of the cam surface and the trigger member (34) against the action of a spring from a first Position in which the actuating body is advanced by the cam surface in a position holding the ball in its locked position, in a second position is movable, in which the actuating body permits a radial inward movement of the ball from its locking position.
  • the actuator is advanced under the influence of the spring over the cam surface, so that the ball is pressed into its locked position.
  • the trigger member is pressed against the action of the spring.
  • the cam surface then releases the actuating body, so that it deflects with radial force exerted on the ball without counterforce and a radial impressions of the ball, also without counterforce allowed.
  • the friction is greatly reduced. Strictly speaking, the ball only touches the tapered end of the actuator in one point.
  • the cam surface touches the actuator body only on one line. As a result, the overall motion sequences are much smoother. In this way, the construction is not so susceptible to possible contamination.
  • tapered second end of the actuating body subsequent to the taper forms a perpendicular to the direction of movement of the actuating body end face and the cam surface has a first cylindrical portion on which the actuating body rests in its first position with the end face.
  • the actuating body in the first position, in which the ball is in its locking position, against axial forces that could be exerted by the ball, safely supported.
  • the actuator is in a defined position.
  • the cam surface has a second cylindrical portion whose diameter is smaller than that of the first cylindrical portion and on which the actuating body rests in its second position with the end face. Then the position of the actuator is also in its second position, in which it allows an inward movement of the ball, precisely defined. This is at the one Dodge the ball gestattenden end position of the actuating body, the ball through the first end of the actuator secured in the transverse bore. The ball can not be pushed into the longitudinal channel.
  • a conical section is formed between the first and second cylindrical portions of the cam surface.
  • Fig. 1 is shown on average a portion of an operating tool or connection part according to the invention, for example an extension 10 with quick release 12 for plug-in tools.
  • the extension 10 has a base body 14. In the base body 14 is located at one end an axial longitudinal channel 16 in the form of a bore.
  • the axial longitudinal channel 16 is defined by the edge surfaces 18 of a Polygon 20 enclosed.
  • a trained as a blind hole transverse bore 22 is perpendicular to the axial longitudinal channel 16 and cuts it.
  • a ball 26 is provided in a transverse bore 24 of the edge surface 18 of the polygon 20, a ball 26 is provided in a transverse bore 24 of the edge surface 18 of the polygon 20, a ball 26 is provided in a transverse bore 24 of the edge surface 18 of the polygon 20, a ball 26 is provided in a transverse bore 24 of the edge surface 18 of the polygon 20, a ball 26 is provided in a transverse bore 24 of the edge surface 18 of the polygon 20, a ball 26 is provided in a transverse bore
  • the adjusting body 28 is formed conically at its ends 30, 32. Due to the conical design of the one end 30, the ball 26 can be sunk continuously according to the axial movement of the adjusting body 28 or pushed out. The other conical end 32 of the actuating body 28 bears against a dumbbell-shaped triggering element 34 designed as a turned part.
  • the trigger member 34 is dumbbell-shaped with two end portions 35 and 37 of cylindrical basic shape with mutually facing frusto-conical portions 39 and 41 which are guided in the transverse bore 22. Between these end portions 35 and 37, a cam surface 43 is formed. This cam surface 43 consists of a cylindrical portion 44 of relatively large diameter, a conical portion 45 and a cylindrical portion 47 of relative to the small diameter portion 44. The cone angle of the conical end 32 of the actuating body 28 is complementary to the cone angle of the conical portion 45 of the cam surface 43.
  • the trigger member 34 projects slightly out of the transverse bore 22 and forms a push button 36.
  • the actuator 34 is biased by a spring 38.
  • the spring 38 is seated between the end portion of the trigger member 34 and the bottom of the transverse bore 22.
  • the spring 38 seeks the trigger member 34 upward in the figures in the Fig.1 to press shown position.
  • the trigger member can by pressing the push button 36 against the action of the spring 38 down in the in Fig.2 be shifted position shown
  • the actuating body 28 has a cylindrical basic shape.
  • the left end in the figures 32 of the actuating body 28 is frustoconical and forms a plane perpendicular to the axis of the actuating body 28, flat end face 48, namely the smaller surface of the truncated cone.
  • the right end in the figures 30 of the actuating body is also frustoconical.
  • the trigger member 34 In the position of Fig.1 the trigger member 34 is pushed by the spring 38 upwards.
  • the adjusting body 28 rests with its flat end face 48 on the cylindrical portion 44 of the trigger member.
  • the actuating body 28 is in its right end position in which he pushes the ball 26 in the transverse bore 24 outwardly into its locking position via the frusto-conical end 30.
  • the actuator body 28 assumes a defined position. It is not possible to move the actuator 28 by pressing the ball 26 to the left in the figures.
  • the actuator 28 Upon depression of the trigger member 34, the end face slides off the cylindrical portion 44. As a result, the adjusting body 28 is released.
  • the actuator can move along the conical portion 45 to the left in the figures until the actuator comes to rest on the cylindrical portion 47 of smaller diameter. In this position of the actuator, which in Fig.2 is shown, the ball 26 can escape without substantial resistance inwardly into the transverse bore 24. This unlocks the lock.
  • the patch on the polygon 20 part such as a socket wrench, can be deducted without effort.
  • the position of the actuator 28 in Fig.2 is precisely defined by abutment of the end surface 48 on the cylindrical portion 47. In this position, the ball 26 is secured in the transverse bore through the end 30 of the actuator body 28. The ball 26 can not be pushed inwardly into the longitudinal channel. Again, it is not possible by pressure on the ball 26, the actuator 28 to move further to the left.
  • the longitudinal channel 16 is closed by a plug 50 at its end.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Sewage (AREA)
  • Manipulator (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Gripping On Spindles (AREA)

Claims (11)

  1. Dispositif d'accouplement pour le verrouillage de connexions mâles-femelles, notamment pour outils, qui peut être désenclenché en actionnant un élément désenclencheur (34), de sorte que la connexion mâle-femelle peut être facilement défaite, la connexion mâle-femelle présentant un embout polygonal (20) situé sur le premier des éléments à connecter et un logement polygonal complémentaire à celui-ci situé sur le second des éléments à connecter, le dispositif d'accouplement présentant un élément désenclencheur (34) et un embout polygonal (20),
    l'embout polygonal (20) présentant un canal longitudinal (16),
    le canal longitudinal (16) étant relié à un perçage transversal (24) débouchant dans une surface polygonale (18),
    une bille (26) étant guidée dans le perçage transversal (24),
    un élément de réglage (28) étant guidé dans le canal longitudinal (16) de façon à se déplacer longitudinalement, élément qui peut s'appuyer contre la bille (26) avec une première extrémité (30) se rétrécissant, de sorte que la bille (26) peut se déplacer lors d'un déplacement longitudinal de l'élément de réglage (28) dans une première direction dans le perçage transversal (24) radialement vers l'extérieur en position de verrouillage, et
    un déplacement longitudinal de l'élément de commande (28) pouvant être amorcé par l'élément désenclencheur (34) contre l'action d'un ressort de rappel (38),
    (a) l'élément de réglage (28) étant une tige se rétrécissant aux deux extrémités, l'extrémité (30) se rétrécissant face au premier sens pouvant s'appuyer contre la bille (26)
    (b) un autre perçage transversal (22) coupant le canal longitudinal (16) étant prévu sur un élément formant un corps de base (14) ou embout polygonal (20),
    caractérisé en ce que
    (c) l'élément désenclencheur (34) est un corps rotatif muni d'une surface à cames (43), l'élément de réglage (28) reposant avec sa seconde extrémité (32) se rétrécissant contre la surface à cames (43) et
    (d) l'élément désenclencheur (34) peut être déplacé contre l'action d'un ressort (38) hors d'une première position (fig. 1), dans laquelle l'élément de réglage (28) avance grâce à la surface à cames (43) dans une position maintenant la bille (26) dans sa position verrouillée, dans une seconde position (fig. 2) dans laquelle l'élément désenclencheur (28) permet un avancement radial de la bille (26) hors de sa position verrouillée.
  2. Dispositif d'accouplement selon la revendication 1, caractérisé en ce que
    (a) la seconde extrémité se rétrécissant (32) de l'élément de réglage (28) forme directement après le rétrécissement une surface frontale (48) perpendiculaire au sens de déplacement de l'élément de réglage (28),
    (b) la surface à cames (43) présente une première section cylindrique (44) contre laquelle s'appuie l'élément de réglage (28) dans sa première position (fig. 1) avec la surface frontale (48).
  3. Dispositif d'accouplement selon la revendication 2, caractérisé en ce que la surface à cames (43) présente une seconde section cylindrique (47) dont le diamètre est inférieur à celui de la première section cylindrique (44) et contre laquelle s'appuie l'élément de réglage (28) dans sa seconde position (fig. 2) avec la surface frontale (48).
  4. Dispositif d'accouplement selon la revendication 3, caractérisé en ce que, dans une seconde position de l'élément de réglage (28) permettant un déport de la bille (26), la bille (26) est fixée dans le perçage transversal (24) par la première extrémité (30) de l'élément de réglage (28).
  5. Dispositif d'accouplement selon la revendication 4, caractérisé en ce qu'une section conique (45) est formée entre la première et la seconde section cylindrique (44 et 47 respectivement) de la surface à cames (43).
  6. Dispositif d'accouplement selon la revendication 5, caractérisé en ce qu'en formant la surface frontale plane (48) la seconde extrémité (32) de l'élément de réglage (28) est en forme de cône tronqué.
  7. Dispositif d'accouplement selon la revendication 6, caractérisé en ce que l'angle conique de l'extrémité conique (32) de l'élément de réglage (28) est complémentaire à l'angle conique de la section conique (45) de la surface à cames (43).
  8. Dispositif d'accouplement selon la revendication 7, caractérisé en ce que l'élément désenclencheur (34) présente une forme d'haltère munie de deux éléments d'extrémité (35,37) de forme de base cylindrique comprenant des sections (39,41) en forme de cône tronqué tournées l'une vers l'autre qui sont guidées dans l'autre perçage transversal (22) et entre lesquelles est formée la surface à cames (43).
  9. Dispositif d'accouplement selon la revendication 8, caractérisé en ce que l'autre perçage transversal (22) est un perçage à trou borgne, le ressort (38) étant situé entre le fond du perçage à trou borgne et la face frontale intérieure de l'élément désenclencheur (34), et l'élément désenclencheur (34) émerge en position de repos avec un bouton-poussoir (36) de la surface du premier élément (14).
  10. Dispositif d'accouplement selon l'une quelconque des revendications 1 à 9, caractérisé en ce que des moyens de limitation de l'avancement de la bille (26) sont prévus sur le perçage transversal (24).
  11. Dispositif d'accouplement selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le canal longitudinal (16) est fermé à son extrémité.
EP03013057A 2002-06-12 2003-06-10 Dispositif d'accouplement pour verrouiller une connexion à fiches d'un outil Expired - Lifetime EP1371455B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20209159U DE20209159U1 (de) 2002-06-12 2002-06-12 Schnellsicherung für Verlängerungen von Steckwerkzeugen
DE20209159U 2002-06-12

Publications (3)

Publication Number Publication Date
EP1371455A2 EP1371455A2 (fr) 2003-12-17
EP1371455A3 EP1371455A3 (fr) 2006-10-04
EP1371455B1 true EP1371455B1 (fr) 2010-03-03

Family

ID=7972121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03013057A Expired - Lifetime EP1371455B1 (fr) 2002-06-12 2003-06-10 Dispositif d'accouplement pour verrouiller une connexion à fiches d'un outil

Country Status (7)

Country Link
US (1) US6889582B2 (fr)
EP (1) EP1371455B1 (fr)
JP (1) JP4297735B2 (fr)
CN (1) CN1330463C (fr)
AT (1) ATE459455T1 (fr)
DE (2) DE20209159U1 (fr)
ES (1) ES2341849T3 (fr)

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CN110273905A (zh) * 2018-10-22 2019-09-24 瑞诗昊昱实业(上海)有限公司 一种连接装置
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CN112060895B (zh) * 2019-06-11 2025-07-08 浙江吉智新能源汽车科技有限公司 一种锁止机构及电池固定装置
CN110899519B (zh) * 2019-11-29 2021-11-05 天水锻压机床(集团)有限公司 一种折弯机上模快速换模装置
CN112477573A (zh) 2020-11-10 2021-03-12 浙江吉利控股集团有限公司 一种吊装换电式运载车辆
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TWI766635B (zh) * 2021-04-01 2022-06-01 鴻安國際興業有限公司 工具快速脫扣結構
CN113700720A (zh) * 2021-09-15 2021-11-26 深圳市雷迪奥视觉技术有限公司 一种连接锁及显示屏

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US4614457A (en) * 1985-07-15 1986-09-30 Sammon James P Coupling mechanism
US4781085A (en) * 1987-12-30 1988-11-01 Bayfront Investments, Inc. Locking socket wrench extension
US4962682A (en) 1988-05-09 1990-10-16 Rose Stephen T Wrench extension and socket coupler
US5291809A (en) * 1992-03-02 1994-03-08 Fox Iii Leonard J Locking adapter for socket wrench
US5390571A (en) * 1993-03-05 1995-02-21 Fox, Iii; Leonard J. Push button socket locking mechanism
US5660491A (en) * 1993-09-22 1997-08-26 Roberts Tool International (Usa), Inc. Universal joint for torque transmitting tools
EP0747174B1 (fr) * 1995-05-30 1997-03-26 Jessie Chow Mécanisme d'accouplement pour une extension de clé à douille
FR2741123B1 (fr) * 1995-11-14 1998-01-30 Facom Dispositif d'accouplement, et outil d'entrainement en rotation correspondant
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DE19744865C2 (de) 1997-10-10 2000-05-31 Hazet Werk Zerver Hermann Steckschlüsselverlängerung
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US6003414A (en) * 1998-06-25 1999-12-21 Hsieh; Chih-Ching Quick-release socket adapter
US6006632A (en) * 1998-06-25 1999-12-28 Hsieh; Chih-Ching Quick-release socket adapter for a ratchet socket wrench
US6672183B2 (en) * 2001-04-20 2004-01-06 Theodore L. Johnson Quick release for use with impact wrench
DE20119262U1 (de) 2001-11-27 2002-01-31 Eduard Wille Gmbh & Co, 42349 Wuppertal Steckverbindung mit Schnellauslösung

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Publication number Publication date
JP2004132539A (ja) 2004-04-30
DE50312468D1 (de) 2010-04-15
US20040007102A1 (en) 2004-01-15
EP1371455A2 (fr) 2003-12-17
US6889582B2 (en) 2005-05-10
CN1330463C (zh) 2007-08-08
DE20209159U1 (de) 2002-08-29
EP1371455A3 (fr) 2006-10-04
JP4297735B2 (ja) 2009-07-15
ATE459455T1 (de) 2010-03-15
CN1488864A (zh) 2004-04-14
ES2341849T3 (es) 2010-06-29

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