Abstract:
The invention describes a handle for a hand-held machine tool comprising a grip element ( 20 ) and a fastening element ( 10 ) for fastening the handle to a housing of a hand-held machine tool, wherein the fastening element ( 10 ) partially protrudes into the grip element ( 20 ) and a damping element ( 30 ) is provided between the grip element ( 20 ) and the fastening element ( 10 ), and wherein the fastening element ( 10 ) forms an undercut ( 12, 15 ) in the grip element ( 20 ).

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a handle, in particular an additional handle, for a hand-held power tool. 
     Numerous power tools, such as angle grinders and rotary hammers, are equipped with an extra handle. To prevent vibrations that occur during operation of the power tool from being transmitted to the operator via the additional handle, additional handles are often provided with vibration-dampening means. 
     Publication DE 10 2004 017 761 A1, for instance, makes known a vibration-damped handle that includes a rigid assembly part for detachable attachment to the electrical hand-held power tool, and that includes a rigid grip part, in the case of which the assembly part extends into the grip part. A vibration-damping material is provided between the assembly part and the grip part, so that the assembly part is accommodated inside the grip part in the vibration-damping material. The assembly part is also provided with retaining elements that provide the assembly part with a sufficient hold in the grip part via the injected, vibration-damping material. 
     SUMMARY OF THE INVENTION 
     The present invention is directed to a handle for a hand-held power tool with a grip element and a fastening element, with which the handle may be attached to a housing of a hand-held power tool. The fastening element extends at least partially into the grip element. A damping element is provided between the grip element and the fastening element, and is made in particular of an elastic material, and most particularly of an elastomer. The grip element and the fastening element are therefore not in contact with each other. 
     It is provided that the fastening element forms an undercut in the grip element. Since the grip element and the fastening element are not in contact with each other, and are separated by the damping element, the fastening element forms a contactless undercut in the grip element. If the damping element fails due to damage or failure of the damping material, the undercut prevents the grip element from become separated from the fastening element. The undercut therefore ensures that the grip element may not be pulled off. The undercut also ensures that the grip element will not become overloaded, since the undercut limits the deflection of the grip element relative to the fastening element. 
     The fastening element is secured in the grip element, in particular via an axial undercut. The axial undercut serves to provide axial retention, thereby preventing the fastening element from being pulled off of the grip element. The fastening element is therefore blocked from being separated from the grip element in the axial direction. 
     In a further embodiment, the undercut also—or as an alternative—serves as a rotation lock for the fastening element in the grip element, thereby preventing the fastening element from being rotated relative to the grip element. The fastening element is therefore blocked from rotating in the grip element. 
     In a preferred embodiment, the fastening element forms an undercut in the grip element via an insert-rotate motion. This means that, when the handle is assembled, the fastening element is inserted in the grip element, so that it extends at least partially into the at least partially hollow grip element. The fastening element and the grip element are then rotated relative to each other along their longitudinal axis. This takes place, e.g., by rotating the fastening element by a certain angle around its longitudinal axis until the fastening element forms an undercut in the grip element. The fastening element therefore forms, with the grip element, a bayonet-type connection without touching the grip element directly. 
     In a further embodiment, the fastening element forms an undercut in the grip element via an insert-rotate-pull motion, which results in axial retention and a rotation lock. When the handle is assembled, the first step is to insert the fastening element in the grip element to the point where it extends at least partially into the at least partially hollow grip element. The fastening element and the grip element are then rotated relative to each other in the longitudinal axis. This takes place, e.g., by rotating the fastening element by a certain angle around its longitudinal axis until the fastening element forms an axial undercut in the grip element. The fastening element and the grip element are then pulled apart from each other until the fastening element is brought into an undercut position, thereby also providing a rotational lock. This relative motion of the fastening element and grip element in the longitudinal direction therefore takes place in a direction opposite to the longitudinal motion with which the fastening element is inserted in the grip element. 
     The fastening element may have different designs. It may be designed, e.g., essentially as a bolt, a pin, or the like. The end that extends out of the grip element may be provided, e.g., with a thread, so that the fastening element may be screwed into the housing of a hand-held power tool. In a simple embodiment, the fastening element may therefore be a screw that is inserted in the grip element of the handle and is screwed into the housing when the handle is installed on a hand-held power tool. Instead of a thread, a clamping device, for example, for connecting the handle with the housing of a hand-held power tool may be provided. 
     In a further alternative embodiment, the fastening element may be designed as a receiving sleeve with a nut. The receiving sleeve serves to receive a screw, which is connectable with the nut. A screw may be installed on the housing of the hand-held power tool. To attach the handle to the hand-held power tool, the screw is inserted in the receiving sleeve and is screwed together with the nut. The screw may be installed on the housing, e.g., using a clamping device. 
     To form an undercut in the grip element, the fastening element is provided with at least one undercut element on its end that extends into the grip element. Preferably, two or more undercut elements are provided. The undercut elements may be integrally formed with the fastening element, or they may be screwed, clipped, or bonded to the fastening element, or they may be joined therewith in any other manner. 
     The undercut elements are located radially—in particular—on the fastening element, where they are positioned, e.g., at an essentially right angle to the longitudinal axis of the fastening element. Two or more undercut elements may be located in a plane that is transverse to the longitudinal axis of the fastening element, i.e., next to each other, or they may be located in several planes that are transverse to the longitudinal axis, i.e., one behind the other. Several undercut elements located one after the other in the longitudinal direction of the fastening element provide additional protection against the grip element becoming torn off if the damping element should fail. Several undercut elements also improve the connection between the fastening element and the damping element, in particular when the damping element is composed of a thermoplastic elastomer that is injected between the fastening element and the grip element. 
     To provide a rotational lock—as an alternative or in addition—the undercut elements may also be oriented axially on the fastening element, thereby enabling them to engage in an axial recess. 
     The undercut elements may be designed to be flat, angled inwardly, bent, or curved. 
     To ensure that the fastening element may form an undercut by using an insert-rotate motion or an insert-rotate-pull motion relative to the grip element, the grip element includes a recess that is provided with at least one undercut element. The undercut elements are located radially—in particular—on the grip element such that they extend into the recess. The recess in the grip element for receiving the fastening element may also be a cavity in the grip element. The undercut elements of the grip element and the undercut elements of the fastening element may be designed, e.g., to complement each other. This means that the undercut elements of the grip element and the undercut elements on the fastening element are shaped such that the fastening element may be inserted through the recess and into the grip element. The undercut elements of the grip element and the fastening element are moved past each other axially until the fastening element extends far enough into the grip element that the fastening element may be brought into an undercut position relative to the grip element by rotating it around its longitudinal axis. As an alternative, the grip element may also be rotated around it longitudinal axis relative to the fastening element, or both elements—the grip element and the fastening element—may be rotated opposite to each other. 
     In a further embodiment, the fastening element may also be brought into a rotationally-locked position in the grip element by using a pulling motion. As an alternative, the grip element may also be moved relative to the fastening element by pulling, or both elements—the grip element and the fastening element—may be pulled apart from each other. The pulling motion takes place in the longitudinal direction of the handle and, in fact, in a direction opposite to the insertion motion with which the fastening element is inserted in the recess of the grip element. The undercut elements of the grip element are provided with a recess into which the undercut elements of the fastening element may engage when pulled. 
     As an alternative, the undercut of the fastening element relative to the grip element may be realized not with a bayonet-type lock, but with a latch-type lock, in which case a contactless and axial, in particular, undercut is formed. The grip element and the fastening element are not in contact with each other either in this embodiment of the locking of fastening element and grip element. 
     The latch-type lock is realized, e.g., by providing either the grip element or the fastening element, or both elements, with at least one latch element. The latch element is designed as an elastic spring element. The latch element may be a latch arm, a latch hook, or the like, or it may be an annular or ring-type latch element. 
     The fastening element and the grip element may be moved into the undercut relative to each other via mutual insertion, since, upon mutual insertion, the fastening element and the grip element slide past each other such that the latch element is elastically deformed. A simple insertion motion is therefore sufficient to provide at least axial retention of the fastening element in the grip element. 
     The damping element is preferably an elastomeric material, e.g., a thermoplastic elastomer or a foam that, once the fastening element has been inserted in the grip element, may be applied between the grip element and the fastening element, e.g., via injection-molding. 
     Instead of installing the damping element after the fastening element has been installed, the damping element may also be installed on the grip element before the fastening element is installed. The damping element is inserted in the grip element such that the fastening element is insertable in the undercut position using an insert-rotate motion or an insert-rotate-pull motion relative to the grip element with the damping element. In this embodiment, the damping element is shaped such that the fastening element with undercut elements may be inserted in the grip element. In particular, the damping element includes recesses for this purpose, which provide at least enough free space for insertion of the fastening element with undercut elements. The recesses in the damping element may have shapes that complement, e.g., the undercut elements. For instance, the fastening element may be inserted through the recesses in the damping element and into the grip element, and it may be moved in the grip element into an undercut position relative to the grip element via rotation around its longitudinal axis, to provide axial retention of the fastening element. The fastening element may also be brought into a rotationally-locked position in the grip element by using a pulling motion relative to the damping element. As an alternative, the grip element with damping element may also be moved relative to the fastening element by pulling, or both elements—the grip element with damping element, and the fastening element—are pulled apart from each other. 
     In this embodiment, the damping element is therefore inserted in the grip element before the fastening element is inserted in the grip element. The damping element may be designed as a separate component, which may be pre-fabricated, and which may be connected with the grip element on one side and with the fastening element on the other side. In particular, the fastening element may be connected with the damping element in a non-detachable manner, e.g., via bonding. As an alternative, the damping element may also be manufactured together with the grip element, e.g., in a two-component injection-molding procedure. 
     A further subject of the present invention is a method for manufacturing an inventive handle, with which the fastening element may be inserted in the grip element such that the fastening element forms an undercut in the grip element. 
     With the method, the fastening element is brought into an axial undercut position in particular, which ensures axial retention if the damping element should fail. In particular, the fastening element is also brought into an undercut position that serves as a rotational lock relative to the grip element. 
     In a preferred embodiment, the fastening element is inserted in the grip element via an insert-rotate motion such that the fastening element forms an undercut in the grip element. 
     This embodiment may be realized, e.g., by providing the grip element with a recess and undercut elements that extend into the recess, and by providing the fastening element with at least one undercut element. The undercut elements of the fastening element and the grip element may be designed, e.g., to complement each other. In a first step, for example, the fastening element may be inserted through the recess and into the grip element. An insertion motion refers to a longitudinal motion of the fastening element relative to the grip element, with which the fastening element is inserted in the grip element. In a second step, the fastening element is then rotated around its longitudinal axis and is brought into an undercut position relative to the grip element. Finally, the damping element is located between the grip element and the fastening element, preferably by injecting a thermoplastic elastomer. The fastening element is thereby kept separated from the grip element, and a contactless undercut is formed. 
     As an alternative, the fastening element may also be inserted in the grip element by using an insert-rotate motion, if the damping element was previously applied to the grip element. 
     In a further embodiment, the fastening element is inserted in the grip element via an insert-rotate-pull motion such that the fastening element forms an undercut in the grip element, which also provides a rotational lock. 
     This embodiment may be realized, e.g., providing the grip element with a recess and undercut elements that extend into the recess, and by providing the fastening element with at least one undercut element. The undercut elements of the fastening element and the grip element may be designed, e.g., to complement each other. In a first step, for example, the fastening element may be inserted through the recess and into the grip element. In a second step, the fastening element is then rotated around its longitudinal axis and is brought into an undercut position relative to the grip element. In a further, third step, the fastening element is moved into an undercut position via a pulling motion relative to the grip element, thereby also securing the fastening element against rotation. A pulling motion refers to a longitudinal motion that takes place opposite to the insertion motion of the first method step, i.e., the fastening element and the grip element are moved away from each other in the longitudinal direction. Finally, the damping element is located between the grip element and the fastening element, preferably by injecting a thermoplastic elastomer. The fastening element is thereby kept separated from the grip element, and a contactless undercut is formed. 
     As an alternative, in this embodiment, the fastening element may also be inserted in the grip element by using an insert-rotate motion, if the damping element was previously applied to the grip element. 
     In an alternative embodiment of the method for manufacturing an inventive handle, the fastening element is inserted in the grip element via an insert-rotate motion such that the fastening element forms an undercut in the grip element. 
     This embodiment may be realized, e.g., by providing one of the two elements—the grip element or the fastening element—with a recess for receiving the other element. For example, the grip element is provided with a recess in which the fastening element may be inserted. In addition, at least one of the two elements—the grip element or the fastening element—includes at least one latch element, which is elastically deformable. For example, the edge of the recess may be rigid in design, while the fastening element is provided with one or more latch elements. The rigid edge of the recess and the at least one latch element of the fastening element are designed to correspond with each other such that, when the grip element and the fastening element are inserted in each other, the edge and the latch element slide past each other, and the latch element is elastically deformed. 
     According to this embodiment of the method, therefore, the grip element and the fastening element are inserted in each other to the extent that they reach a contactless undercut position relative to each other. Finally, the intermediate space may be filled, e.g., with an elastic material, e.g., an elastomer or a foam, as the damping element, e.g., via injection-molding. 
     The undercut elements of the fastening element and the grip element may be designed, e.g., to complement each other. In a first step, for example, the fastening element may be inserted through the recess and into the grip element. 
     The inventive handle is preferably designed in the shape of a rod or stem or the like. The grip element of the handle is essentially cylindrical in shape. In a simple embodiment, this may be a cylinder. In a more advanced embodiment, the cylindrical grip element may also be adapted to the ergonomy of the human hand by providing it, e.g., with different diameters along its longitudinal axis, in deviation from a purely cylindrical shape. The grip element may be rotationally symmetrical, thereby enabling the user to grip the handle in any direction. As an alternative, the grip element may also be adapted especially to the ergonomy of the human hand in such a special manner that a first region of the grip element serves especially as a contact surface for the hand surface, and a second region serves as a contact surface for the fingers. 
     The grip element may be designed as one piece or a multiple-component part. A handle with a single-pieced grip element has, e.g., a rod-shaped grip element made, e.g., of a thermoplastic plastic, with a fastening element on one end of the grip element. In contrast, a two-pieced grip element includes, e.g., a grip core composed of a hard material, e.g., a thermoplastic plastic, and a grip shell composed of a soft material, e.g., an elastic plastic. The grip shell may enclose the grip core entirely or partially. 
     The inventive handle may also be designed in the shape of a bracket handle. A bracket handle is basically U-shaped. At least one of the two ends of the legs of the U-shaped handle is provided with a fastening element for attachment to a housing of a hand-held power tool. Both ends of the legs of the U-shaped handle may also each be provided with a fastening element. 
     The inventive handle is suited, in particular, for use as an additional handle for a cordless or mains-operated hand-held power tool, e.g., an angle grinder or a rotary hammer. A further subject of the present invention, therefore, is a hand-held power tool that includes an inventive handle. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention is explained in greater detail below with reference to the attached drawing. The following schematic illustrations are provided: 
         FIG. 1  shows a first embodiment of an inventive handle with a fastening element in an axial undercut position relative to a grip element 
         FIG. 2  shows the fastening element in  FIG. 1   
         FIG. 3  shows the grip element in  FIG. 1   
         FIG. 4  shows a second embodiment of an inventive handle, without a fastening element 
         FIG. 5  shows the handle in  FIG. 4  with a fastening element 
         FIG. 6  shows a further embodiment of an inventive handle, with an additional rotational lock 
         FIG. 7  shows the handle in  FIG. 6  without a damping element, in a longitudinal sectional view 
         FIG. 8  shows the grip element of the handle in  FIG. 6 , in a perspective view 
         FIG. 9  shows an alternative embodiment of an inventive handle with a fastening element in an axial undercut position relative to a grip element 
         FIG. 10  shows an embodiment of an inventive handle with a latch element on the grip element 
         FIG. 11  shows a further embodiment of an inventive handle with a latch element on the fastening element. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     A first embodiment of an inventive handle  100  is shown in  FIG. 1 . Handle  100  is suitable for use as an additional handle for a hand-held power tool (not shown). It includes a grip element  20 , a fastening element  10 , and a damping element  30  located between grip element  20  and fastening element  10 . Grip element  20  and damping element  30  are shown as cross-sections in  FIG. 1 . Grip element  20  is stem-like in design and is cylindrical in shape. A cavity  21  is formed inside grip element  20 . Handle  100  may be connected with a housing of the hand-held power tool via a fastening element  10 , which extends at least partially into grip element  20 . Fastening element  10  may include, e.g., a thread (not shown), with which it may be screwed into the housing. Grip element  20  includes a flange-type expansion  22  on its end facing fastening element  10 . 
     To receive fastening element  10 , grip element  20  is provided with a recess  24 . Fastening element  10  forms a contactless undercut  12  in grip element  20 . Undercut  12  is contactless, since fastening element  10  and grip element  20  are separated from each other via damping element  30 , i.e., fastening element  10  and grip element  20  do not touch each other. If damping element  30  should fail, undercut  12  prevents fastening element  10  from becoming separated from grip element  20 . Undercut  12  is an axial undercut in particular, which provides axial retention of fastening element  10 . Undercut  12  is realized in particular by using an insert-rotate motion, as described with reference to the embodiment shown in  FIG. 1 through 5 . As an alternative, an undercut of fastening element  10  may also be realized in grip element  20  by using an insert-rotate-pull motion, as depicted in the embodiment shown in  FIGS. 6 through 8 . 
     Fastening element  10  includes undercut elements  14 , which are located radially on shank  11  of fastening element  10 . In the embodiment shown in  FIGS. 1 and 2 , three undercut elements  14  are provided in a plane perpendicular to the longitudinal axis of fastening element  10 , i.e., three undercut elements  14  are located next to each other. Undercut elements  14  as shown in  FIGS. 1 and 2  are also located one behind the other, i.e., they distributed on three planes that are transverse to the longitudinal axis. As shown with fastening element  10  in  FIG. 5 , it is also possible, as an alternative, to provide fewer undercut elements  14  than are shown in  FIGS. 1 and 2 . In  FIG. 5 , for instance, only three undercut elements  14  are located one next to the other, i.e., in a plane that is transverse to the longitudinal axis of fastening element  10 . It is also possible to provide more undercut elements than are shown in  FIGS. 1 and 2  (not shown). In the embodiment shown, undercut elements  14  are integrally formed with shank  11 . 
     In a first embodiment, which is shown in  FIGS. 1 through 3 , fastening element  10  forms an undercut  12  in grip element  20  via a rotate-insert motion only after damping element  30  has been inserted in grip element  20 . In a second embodiment, which is shown in  FIGS. 4 through 5 , fastening element  10  is connected with grip element  20  via a rotate-insert motion only after damping element  30  has been installed on grip element  20 . 
     In the sectional view of grip element  20  in  FIG. 3 , it is shown that recess  24  in grip element  20  is provided with undercut elements  26 , which are designed to complement undercut elements  14  of the fastening element. Undercut elements  26  are also located radially on grip element  20 , so that they extend into recess  24  or cavity  21 . Fastening element  10  with undercut elements  14  may therefore be inserted through recess  24  and into grip element  20 . Fastening element  10  is inserted in grip element  20  so far that undercut elements  14  are separated from undercut elements  26  of grip element  20  in the longitudinal direction. Via a rotational motion around its longitudinal axis, fastening element  10  is then brought into an undercut position  12  relative to grip element  10 —specifically, relative to undercut elements  26  of grip element  10 —without touching grip element  20 . Damping element  30  may then be installed between fastening element  10  and grip element  20 , e.g., by injecting a thermoplastic elastomer. 
     In the second embodiment as shown in  FIGS. 4 through 5 , damping element  30  is installed in grip element  20  ( FIG. 4 ) before fastening element  10  is installed in grip element  20  ( FIG. 5 ). For example, damping element  30  may be injection-molded onto grip element  20  as a thermoplastic elastomer. Damping element  30  also includes a recess  34  and is provided with projections  36  located radially on damping element  30 , so that they extend into recess  34 . In the embodiment shown, projections  36  on the damping element are designed to complement undercut elements  14  of fastening element  10 . Fastening element  10  may therefore be inserted through recess  34  and into grip element  20  with damping element  30 . Fastening element  10  is inserted in grip element  20  until, via a rotational motion of fastening element  10  around its longitudinal axis, undercut elements  14  extend behind projections  36  of damping element  30 . Fastening element  10  is therefore simultaneously brought into an axial undercut position  12  relative to grip element  20  without touching grip element  20 . 
     In an alternative embodiment of a handle  100  as shown in  FIGS. 6 through 8 , fastening element  10  forms not only an axial undercut  12  in grip element  20 , but also an undercut  15  that serves as a rotational lock. 
     In the embodiment shown in  FIGS. 6 through 8 , fastening element  10  includes a receiving sleeve  18  and a nut  19 . Receiving sleeve  18  serves to receive a screw  51 , and is made, e.g., of a hard plastic. Screw  51  may be installed on the housing of a hand-held power tool (not shown) using a clamping device  52  shown in  FIG. 6 , e.g., a clamp. To attach handle  100  to a hand-held power tool, screw  51  is inserted in receiving sleeve  18  and is screwed together with nut  19 . 
     A damping element  30 , e.g., made of a thermoplastic elastomer, is located between fastening element  10  and grip element  20 , so that fastening element  10  and grip  20  element do not touch each other. 
     To form an axial undercut  12 , grip element  20  is provided with undercut elements  26  that, as shown in the perspective illustration in  FIGS. 7 and 8 , are located radially on inner wall  23  of grip element  20  so that they extend into cavity  21  or recess  24 . In the embodiment shown, undercut elements  26  are integrally formed with inner wall  23  of grip element  20 . In the same manner, sleeve  18  of fastening element  10  is also provided with undercut elements  14 . Undercut elements  14  of fastening element  10  and undercut elements  26  of grip element  20  are designed to complement each other. 
     To form an undercut  15  that also serves as a rotation lock, sleeve  18  also includes at least one undercut element  17 , which extends in the axial direction relative to undercut elements  14 . In the same manner, at least one undercut element  26  of grip element  20  is provided with a recess  27  in which undercut element  17  may engage in a contactless manner. 
     Undercuts  12 ,  15  are realized using an insert-rotate-pull motion of fastening element  10  relative to grip element  20 . Undercut elements  26  of grip element  20  and undercut elements  14  of sleeve  18  are designed to complement each other, so that sleeve  18  of fastening element  10  may be inserted through recess  24  and into grip element  20 . Sleeve  18  is inserted into grip element  20  until it may be moved—via rotation about its longitudinal axis—into an undercut position  12  relative to grip element  20 , i.e., relative to undercut elements  26 . Sleeve  18  is then pulled in order to also move it into a rotationally-locked undercut position  15  in grip element  10 . Pulling sleeve  18  with fastening element  10  relative to grip element  20  is therefore a longitudinal motion that takes place in the direction opposite to the insertion of fastening element  10  in grip element  20 . When pulled, at least one undercut element  17  of sleeve  18  engages in a recess  27  in an undercut element  26  of grip element  20 . Undercut  15 , which also serves as a rotation lock, is also a contactless undercut, since a damping element  30  is provided between grip element  20  and sleeve  18 . 
     In an alternative embodiment as shown in  FIG. 9 , fastening element  10  forms—via a simple insertion motion—an undercut  12  in grip element  20 . After fastening element  10  has been inserted in grip element  20 , damping element  30  is installed between grip element  20  and fastening element  10 . In the embodiment shown, fastening element  10  is composed of two pieces. It includes a type of threaded bolt  55  and a carrier element  56 . Carrier element  56  may be made, e.g., of a thermoplastic plastic that is injection-molded onto threaded bolt  55 . 
     In the sectional views shown in  FIGS. 9   a  and  9   b , it is shown that complementary undercut elements  14 ,  26  are formed on carrier element  56  of fastening element  10  and on grip element  20 . Undercut elements  14 ,  26  are located on fastening element  10  and grip element  20  such that they are separated by 120°. This makes it possible, during assembly, to mutually insert grip element  20  and fastening element  10  in the longitudinal direction of the handle, and to then rotate them by approximately 60° relative to each other around the longitudinal axis, thereby bringing fastening element  10  into an axial undercut position relative to grip element  20 . In the undercut position, grip element  20  and fastening element  10  are inserted into each other to the extent that undercut elements  14  of fastening element  10  are separated from undercut elements  26  of grip element  20  in the longitudinal direction and therefore do not touch each other. Damping element  30  may then be installed between fastening element  10  and grip element  20 , e.g., via injection-molding of a thermoplastic elastomer. 
     In contrast to the embodiment shown in  FIGS. 1 through 3 , carrier part  56  of fastening element  10  is provided with a recess  57  into which grip element  20  is inserted. Undercut elements  14  of fastening element  10  extend radially into recess  57 . Undercut elements  26  of grip element  20  are oriented radially outwardly in the manner of a collar. 
       FIGS. 10 and 11  show two embodiments, in which a bayonet-type lock is replaced with a latch-type lock. A contactless axial undercut  12  of fastening element  10  relative to grip element  20  is also formed in this case. The latch-type lock is realized by the fact that a latch element  61  is integrally formed with grip element  20 , as shown in  FIG. 10 , and that a latch element  62  is integrally formed with fastening element  10 , as shown in  FIG. 11 . Latch elements  61 ,  62  are designed as annular, elastic spring elements. As an alternative, one or more latch hooks or the like may be used as latch elements  61 ,  62 , in which case, several latch hooks or the like may be located, e.g., equidistantly on the circumference of the grip element and/or the fastening element (not shown). 
     In the embodiment shown in  FIG. 10 , a recess  24  for receiving fastening element  10  is provided in head region  28  of grip element  20 . An annular latch element  61  is integrally formed with grip element  20  on the edge of recess  24 , which serves as undercut element  26 . Fastening element  10  is designed as an at least two-pieced part, including a type of threaded bolt  55  and a carrier element  56 . Carrier element  56  accommodates threaded bolt  55  at least partially. Undercut elements  16  are formed on the edge of carrier element  56 , which reach behind undercut elements  26  of grip element  20  in a contactless manner. A damping element  30  is inserted between grip element  20  and fastening element  10 , e.g., in the form of an elastomer that is injected in the intermediate space between grip element  20  and fastening element  10  in head region  22 . 
     A handle of this type is assembled simply by inserting grip element  20  and fastening element  10  into each other, which results in fastening element  10  snapping into place in grip element  20 . Fastening element  10  is inserted into recess  24  in the longitudinal direction of the handle and it is inserted into head region  22  to the extent that fastening element  10  is separated from grip element  20  in the axial direction, thereby forming an axial undercut  12 . Due to its elasticity, latch element  61  on grip element  20  permits fastening element  10  to be inserted into grip element  20 , even through the inner diameter at the edge of recess  24  is smaller than the outer diameter of carrier element  56 . 
     In the embodiment shown in  FIG. 11 , carrier element  56  of fastening element  10  is provided with a recess  57  into which grip element  20  may be inserted. An annular latch element  62  is integrally formed on the edge of recess  57 , which serves as undercut element  14 , since it points radially inward into recess  57 . Grip element  20  is provided with corresponding undercut elements  26 , which point radially outwardly. When grip element  20  is inserted into recess  57 , grip element  20  snaps into place in fastening element  10 , since latch element  62  is elastically deformable. During assembly, grip element  20  is inserted into recess  57  of fastening element  10  to the extent that it is separated from fastening element  10  in the axial direction, thereby resulting in undercut elements  14 ,  26  moving into an axial undercut position  12 .