Abstract: Disclosed is a fixing device for fixing an actuation device with push-push kinematics on a component of a motor vehicle. The fixing device includes a housing with a guiding element and a locking recess on its outer surface, an opening in the component for inserting the actuation device, a guiding element on the component, and a locking projection on the component. The guiding elements of the actuation device and the component corporate such that the actuation device is guided into the opening in a predetermined rotational position, and the locking projection and the locking recess lock with each other upon the actuation device being inserted fully into the opening in the predetermined rotational position, and thus fix the actuation device on the component. The locking can be released again by rotating of the actuation device out of the predetermined rotational position.

Abstract: A cam lock clamp comprises a stud having a substantially cylindrical body with a first end including a head area and a second end arranged to support one or more disc springs concentrically about the stud. A socket is arranged to mechanically couple concentrically around the stud with the head area of the stud being exposed above an uppermost portion of the socket. The socket is configured to be firmly attached to a consumable material. A camshaft has a substantially cylindrical body and is configured to mount within a bore of a backing plate. The camshaft further comprises an eccentric cutout area located in a central portion of the camshaft body. The camshaft is configured to engage and lock the head area of the stud when the consumable material and the backing plate are proximate to one another.

Abstract: The present invention is directed to a rod string with a plurality of rod sections and a method for making up and breaking out the rod sections. The rod sections have corresponding pin and box ends, each having grooves and lands and an ungrooved portion. The rod sections can be connected by inserting the pin end into a box end and turning less than a full turn. A lock engagement mechanism having a first end and a second end is provided inside the rod sections and locks when the pin end is rotated into place. The lock engagement mechanism has a rotation stop which protrudes proximate the first end to prevent relative rotation of two rod sections until a key manipulates the lock engagement mechanism to retract the rotation stop.

Abstract: A quick release attachment for a power tool having a rotatable spindle includes a pad assembly and a quick release connector adapted to join the pad assembly to the spindle. The pad assembly includes a mounting plate and a pad affixed to at least one side of the mounting plate, wherein the pad includes a primary material that is either metal, stone, ceramic, fiber, sand, nylon or polypropylene, and the mounting plate includes a central aperture. The mounting plate aperture further comprises a circular ring disposed therein and has a t-shaped key extending diametrically across the aperture. The t-shaped key comprises a magnetically attractive material. The quick release connector has a main body adapted to fixedly engage the spindle. The connector further has a head end extending from the main body and having a circular cross-section sized to engage the circular ring. The head end further has a slot sized to engage the t-shaped key.

Abstract: An elastomeric assembly is disposed within an aperture defined by a supporting structure of a vehicle. The elastomeric assembly is movable between a first position where the elastomeric assembly can move axial within the aperture and a second position where the elastomeric assembly is prohibited from moving axially within the aperture.

Abstract: An assembly includes a board, a heat sink, one or more retainers, and/or one or more light-emitting diode packages. The board includes a face surface, a rear surface opposite the face surface, and side edges. The one or more retainers are configured to secure the board to the heat sink. One or more light-emitting diode packages can be secured to the board for creating a light-emitting device assembly.

Abstract: A fastening assembly for attaching and accurate positioning of a first workpiece, which defines a first main axis, on a second workpiece, which defines a second main axis and includes an anchor secured on a supporting surface of the second workpiece. The fastening assembly comprises a first member including a fastening portion for holding the first workpiece; a second member including a receptacle for the anchor; and wherein the first member and the second member are movable relative to each other in order to move the fastening portion toward or away from the supporting surface of the second member.

Abstract: A tool for a medical instrument includes a coupling member on the proximal end of the tool, for releasable mechanical coupling with a distal end of a shaft of a medical instrument, wherein the coupling member is in the form of a helical cutout of a circular cylinder barrel.

Abstract: A modular climbing tree that includes a plurality of poles and connecting components configured for connecting the poles and accessories. At least one connecting component has a first connecting part configured for fastening to a pole or surface and an opposite second connecting part having at least one male coupling element and at least one female coupling element for engaging and locking with mating coupling elements of another connecting component. The male and female coupling elements on opposing connecting components are engaged to interlock. Thereafter the opposite connecting components are rotated about their common axis to further lock together in a detachable manner.

Abstract: The invention relates to a device for connecting a valve housing (2; 2.1; 2.2; 2.3; 2.4) to an actuator (3) in a process valve acting as a lift valve (1; 1.1; 1.2; 1.3; 1.4). The aim of the invention is to design a device for connecting a valve housing to an actuator in a process valve of the type in question that acts as a lift valve, is shorter and less expensive than all known devices of said type, is as safe as possible when opening, and has a very simple design. Said aim is achieved by mounting the lantern-type housing (3.1) on the valve housing (2; 2.1; 2.2; 2.3, 2.4) by means of a bayonet joint (2f, 2g/3.1d, 3.1e) or a bayonet-type joint.

Abstract: A system that is used to lock an accessory, for example a cystoscope that is locked to a hand held device that provides prostate ablation therapy, within a housing includes a sliding lock device (SLD) which receives and surrounds at least a portion of the cystoscope in an opening. Once the cystoscope is positioned within the SLD, the user may slide a cover to engage a tab of the cystoscope and secure the cystoscope within the SLD and the housing. The SLD also includes a mechanism for prohibiting cystoscope rotation. After the cystoscope is locked, the SLD allows for a defined amount of axial movement to facilitate prostate viewing and the deployment of prostate ablation therapy. Alternatively, the cover may slide in a rotational manner to secure the cystoscope.

Abstract: The invention refers to an opening cylinder (1) for an open-end spinning device with a core piece (2) and a tooth-set carrier (3) capable of rotating around a common rotating axis (A) and detachably connected to one another by means of a quick-locking mechanism. According to the invention, the quick-locking mechanism is executed as a turn-lock fastener (8), so that the tooth-set carrier (3) is detachably connected to it by means of a rotational movement around the rotational axis (A) relative to the core piece (2).

Abstract: A kitchen appliance includes a coupling plate having an edge enclosing an inner area and provided with coupling points of a coupling device for removable coupling of a processing container. The coupling plate is configured in the inner area in either of two ways, a first way in which the coupling plate has a pin which projects in a coupling direction for engagement in a groove in a base section of the processing container, a second way in which the coupling plate has a groove for engagement of a pin which projects in the coupling direction from the base section of the processing container.

Abstract: A fixing arrangement for fixing a first motor vehicle component to a second motor vehicle component includes first second fixing elements. The first and second fixing elements are connectable to each other in a positive locking manner. The second fixing element has a pin configured as a ball; and the first fixing element has a sleeve that fits over the spherical pin to produce a positive locking engagement. The first fixing element has a securing device designed as a cap, which is mounted on an outer shell sleeve surface such that the cap is movable in the axial direction. The sleeve is locked on the spherical pin by axial relative movement of the cap from a defined first position into a defined second position.

Abstract: An auger attachment system having a collar combined with an auger and one or more couplers each having a first end and a second end. The coupler first end is adapted to operatively combine with the output drive shaft of an engine suitable for rotating an auger. Each coupler has a different size and/or geometry at their respective first ends to allow each coupler to combine with a drive shaft having the corresponding size and geometry. The coupler second end is adapted to combine with the collar thereby allowing a single auger to be used with multiple drive shafts, each having a different size and/or geometry.

Abstract: A variable length golf club shaft is disclosed herein. The variable length golf club shaft includes at least one upper shaft portion having a first diameter and a hollow lower shaft portion having a second diameter that is larger than the first diameter, wherein the lower shaft portion has at least one notch, and wherein the at least one upper shaft portion has at least one pin that fits within the at least one notch.

Abstract: A filter (18) is fastened by means of a releasable detent connection (20) in a fastening housing part (14). One detent component (32) is connected to the filter element (18) and one detent component (36) is connected to the fastening housing part (14). At least one detent means (32) of one of the detent components engages in a bayonet-like manner in a cut-out (38) in the other detent component (36). One switching component (60) of a switching device (58) is connected to the filter element (18) and one switching component (62) is connected to the fastening housing part (14). One of the switching components (60) includes at least one switching lug (76) extending radially to a rotational/plug-in axis (30) of the filter (10), and one of the switching components (62) includes a switching slot (78) for guiding the switching lug (76).

Abstract: A connection arrangement for releasably connecting an electrical device and a power control module, the power control module including a device for controlling the supply of electrical power to the functional component. The connection arrangement includes a first connecting portion associated with the electrical device or the power control module and configured to engage with a second connecting portion associated with the other one of the device and module. The first connecting portion including a first locking member and the second connecting portion including a second locking member, wherein when the first and second connection portions are engaged the first and second locking members are movable relative to each other between an unlocked position in which the first and second connection portions are separable and a locked position in which the first and second connection portions are locked together. Preferably, the electrical device is a power tool module.

Abstract: A universal connector (5) is provided for connecting an architectural covering to an architectural surface. The connector has an adaptor plate (6) that is substantially circular and has one or more radially outwardly projecting flanges (16) and is arranged to be inserted into a ring-shaped engagement member (7) having one or more openings (18) in a front cover (17). The adaptor plate and the engagement member are configured such that the adaptor plate may be inserted into the engagement member by aligning the one or more flanges of the adaptor plate with a respective opening in the front cover of the engagement member and removal of the adaptor plate from the engagement member may subsequently be prevented by a partial rotation of the adaptor plate relative to the engagement member.

Abstract: A gas spring assembly includes a first end member and a second end member. A flexible wall is secured between the first and second end members and at least partially defines a spring chamber therebetween. A fitting is supported on the first end member and is rotatable between a first position in which the fitting can be axially displaced and a second position in which the fitting is axially restrained. A method is also included.

Abstract: A fastening device for fastening an assembly in an opening of a wall of a vehicle is described. The fastening device has a supporting element (2) to be placed on the wall (1) and a retaining element (3) having at least one retaining wing (3.1) for fastening the fastening device in the opening (1.1) of the wall, wherein the retaining element (3) for fastening the fastening device is rotatably arranged relative to the supporting element (2), i.e., the retaining element (3) allows a quarter-turn fastener solution. In order to be able to mount without tools, at least one rotating wing (3.2) is arranged on the retaining element (3) and has a grasping surface (AF) in the direction of rotation for fastening the fastening device, said grasping surface being inclined at an angle (?) at least in the direction of rotation toward the direction of rotation and toward the wall. However, increased effort is usually required to remove inclined surfaces from injection molds. Therefore, the rotating wing (3.

Abstract: A fixing device for releasable fixing an electrical energy accumulator to a carrying structure of a motor vehicle includes at least one insertion bolt and a receiver unit for the insertion bolt which are provided on the carrying structure and on the energy accumulator (or vice versa). The insertion bolt includes a retaining protrusion and the receiver unit includes a cage and a locking element mounted in the cage. The cage includes an insertion opening into which the insertion bolt can be introduced along an insertion direction, and the locking element can be moved between a release position and a locked position. In the release position, the locking element opens the insertion opening for introduction of the insertion bolt and in the locked position engages behind the retaining protrusion of the insertion bolt when the insertion bolt is introduced in the insertion opening of the cage.

Abstract: A holding hole of a holding body has an edge portion and an inner peripheral surface which is a concavely curved surface connected to the edge portion. In a light source unit which supports a light source, projections are formed at three locations, and each of front surfaces thereof has a convexly curved line having a curvature radius longer than that of the inner peripheral surface. When the light source unit is inserted into the holding hole, the front surfaces of the projections at the three locations are brought into point contact with the edge portion at contact portions on the convexly curved lines.

Abstract: A quick change system for quench press tooling is disclosed. The system including an upper adapter subassembly, an inner bottom adapter, and an outer bottom adapter, the upper adapter subassembly configured for attachment to a machine and the bottom adapters configured for mechanical attachment to the tooling of the machine. The upper adapter assembly further including an inner top adapter having a plurality of notches radially along the outer diameter of the inner top adapter, an inner collar having a plurality of radially inwardly extending tabs at top and bottom ends of the inner collar, a ring shaped holding plate having a series of bolt holes, an outer top adapter in communication with the holding plate, having a notched outwardly extending flange lip, and an outer collar having an outwardly extending lip at a top end and a sidewall extending perpendicularly downward.

Abstract: A connecting structure adapted to connect two sound boxes comprises a clasping assembly and a positioning structure, the surface of the clasping assembly has a protruding portion, which has several protruding members, the surface of the positioning assembly has a hollow open, which has several oblique-rotation positioning portions and several apertures according to the protruding members of the clasping assembly, wherein the clasping assembly and the positioning assembly have four locking holes respectively for the clasping assembly and the positioning assembly being fixed to the two sound boxes; the protruding members of the protruding portion of the clasping assembly are inserted into the apertures of the hollow open of the positioning assembly accordingly, the clasping assembly or the positioning assembly is rotated in order to let the protruding members be fixed in the positioning portions, so that the different sound boxes are connected to each other.

Abstract: A supplementary actuation device (1) inserted in a housing (2) is provided for the positioning of a bolt component (9) which is rotationally locked in position to the housing (2), wherein a signal is reliably delivered in the case of a resulting rotational locking of the housing (2) with the bolt component (9) by means of rotating the supplementary actuation device (1) together with the bolt component (9).

Abstract: A mast arrangement having two elongate individual masts. The first elongate individual mast comprises a hollow connector comprising an inner diameter. The second elongate individual mast comprises a protruding connector end. The protruding connector end telescopically engages with the hollow connector end. The mast arrangement also comprises a pin and slot arrangement and collars to connect the masts together and minimize unwanted disengagement of the masts from each other.

Abstract: A fixing device for an emblem plate includes a front cover, a panel, and a rotating member. The emblem plate is located on an outside of the front cover. A locking portion extends from an inner side of the front cover. The locking portion includes a hook. The panel defines a first through hole. The rotating member includes a rotating shaft extending through the first through hole. The rotating shaft axially defines a second through hole. The locking portion extends through the second through hole. A locking block is formed on an inner sidewall of the second through hole, corresponding to the hook. The rotating shaft can be rotated relative to the front cover in the first through hole of the panel, to release the locking block from the hook.

Abstract: Asymmetrical joint systems, structures having interlocking joints, methods of fabricating asymmetric joint systems and methods for fabricating structures having interlocking joints. In a preferred embodiment, the invention a joint system comprising an asymmetrical mortise into which an asymmetrical tenon fits. In another preferred embodiment, the invention is a quadrilateral structure that incorporates a diamond-shaped bracing system. In another preferred embodiment, the invention is a quadrilateral structure that incorporates a rotational lockdown component.

Abstract: A retention system comprises at least one elongate channel member and at least one clip. The channel member defines an internal channel and has a longitudinal slot providing access to the channel. Each clip has an engagement portion for location in the channel and an external attachment portion connected to the engagement portion by a neck which passes through the slot. The engagement portion is shaped such that in one angular orientation it is able to pass through the longitudinal slot and such that once inserted it can be moved to another angular orientation in which it is unable to pass through the longitudinal, slot. At least part of the clip which contacts the channel member once inserted comprises a friction material (it adapted so that contact between the material and the channel member resists longitudinal movement of the clip along the channel member.

Abstract: Disclosed is a connecting device of a parking cable for an electric parking brake, which connects an actuator for the electric parking brake with a parking cable. The connecting device includes a connector and a reaction force member. The connector includes a small diameter section having one side into which an outer peripheral surface of the parking brake is inserted, a large diameter section that extends from the small diameter section to have a diameter larger than that of the small diameter section, an axial cutout slit axially formed through upper and lower surfaces of an outer peripheral portion of the large diameter section such that protrusions circumferentially protruding from the actuator are inserted into the axial cutout slit through the large diameter section, a circumferential cutout slit that extends from an inner end of the axial cutout slit in a circumferential direction, and a cutout groove that axially extends from the circumferential cutout slit.

Abstract: A connector for a bracket including a male adapter and a female adapter is provided. The male adapter includes a first base structure and a neck structure protruding out of the base structure and is disposed on a surface to be clamped. The neck structure includes multiple first lobes extending radially outward from the neck structure. The first lobes include a first mating surface contour on a bottom surface. The female adapter includes a second base structure. The second base structure includes multiple second lobes made of a flexible material. The second base structure also includes a second mating surface contour on a top surface and is configured to fit into said first mating surface contour thereby deforming said multiple second lobes to induce a clamping force between a shoulder of said female adapter and a surface of a bracket.

Abstract: The invention relates to a coupling between two objects via a coupling element. Each object comprises a panel with a continuous hole with four inward protruding tongues which are disposed at 90° to each other and extend over angles of about 22.5°. The coupling element comprises a shank, an insert stop member on both sides so that the coupling element can be inserted in the one or the other direction into the hole, four locking cams on each end zone of the shank which each extend over angles of 22.5° disposed at 0°, (90°?22.5°), 180°, (270°?22.5°), and rotation stop members. The coupling element can be inserted into the hole in a chosen orientation as desired in one of four equidistant angular positions and then rotated through about 22.5° in the one or the other direction, wherein rotation locking means fix the chosen angular position.

Abstract: A mounting system is disclosed for mounting a bearing assembly or other mechanical element to a shaft. The mounting system uses a tapered sleeve mechanism to secure the bearing assembly on the shaft. Specifically, a pressure loaded piston drives the sleeve from a pre-assembled position to an initial position. The initial position is determined by monitoring the pressure applied to the piston. Once the initial position has been reached, a linear indicator is used to measure the axial sleeve movement from the initial position to a final position. The system remains in place after the bearing is installed on the shaft and facilitates removal of the bearing assembly from the shaft.

Abstract: Embodiments of the present invention generally relate to a method and an apparatus for connecting adjacent concrete structures. In one aspect, a coupling assembly for connecting adjacent concrete structures erected for street, roadway or highway use is provided. The coupling assembly includes a first anchor device with a female end comprising a socket having at least one slot. The coupling assembly further includes a second anchor device with a male end comprising at least one projection configured to mate with the at least one slot in the socket, wherein the second anchor device is movable from a first position to a second position in order to couple the male end to the female end. In another aspect, a method of coupling a first anchor device to a second anchor device is provided.

Abstract: The connector is intended for use in displays of the kind which include a display frame formed of a plurality of beams (1) which are joined together by multi-way node fittings to form a three-dimensional shape, and display panels are releasably secured to the beams. The connector includes a male fitting (3) which has a stem (8) projecting from a plate (4), and a head (9) comprising four noses which project laterally from the stem. The head (9) is inserted in a correspondingly-shaped aperture of a female node fitting and rotated into positive engagement with the inner face of the node fitting. The trailing faces of the four noses have oppositely-inclined ramps which act to provide progressive tightening and alignment of the connector as the male part is rotated within the aperture. The connector provides a joint with greater stability and enables a firm connection to be obtained with a smaller angle of rotation and reduced engagement force.

Abstract: A driver module for clutches, in particular wet-running double clutch assemblies, including a clutch housing and a cover which are connected with each other, enclosing an interior space. The cover is rotationally fixed in relation to the clutch housing in the axial direction and in the circumferential direction by a connecting ring.

Abstract: The invention relates to a fixing device (200) for fixing in an opening in a wall of a vehicle, said fixing device (200) having a support element (210) with at least one support lug (220). The fixing device (200) also comprises a retaining element (230) with at least one retaining arm (240) for fixing the fixing device (200) to the wall. To fix the fixing device (200) in relation to the support element (210), the retaining element (230) runs through the support element (210) and can rotate it the latter, the support lug (220) being designed to block the rotation of the support element (210).

Abstract: An end fitting comprises a spigot end designed for reversibly fixing a wire rope to any type of functional part integral with or attached to a socket end. This spigot end is defined by an outer shell which is cylindrical overall; the shell comprising at least one fin. The spigot end comprises an axial housing designed to accommodate the wire rope. The shell has at least one through opening capable of accommodating an element for attaching said wire rope such as a pin or a rope fastener which passes through the wire rope. The spigot end is designed to cooperate with said socket end like a bayonet.

Abstract: A releasable connector assembly comprising a socket body 2 and a plug body 3. The socket body 2 has a set of channels 15 formed therein and the plug body 3 having a corresponding set of radial tabs 7 formed thereon, the channels 15 forming a keyway for the tabs 7 such that load bearing projections 5, 14 on the bodies are releasably engageable in the manner of a bayonet coupling. The assembly is characterised in that a set of locking pins are provided on the socket member that are extendable into the channels 15 so as, in use, to trap the tabs 7 in undercuts 15k of the channels 15, thereby preventing unintentional release of the plug 3 from the socket 2, and retractable from the channels 15 so as to enable release of the plug 3 from the socket 2.

Abstract: An actuator device for a bicycle gearshift is provided. The actuator device having an articulated quadrilateral mechanism intended to be integrally fixed to a bicycle frame and to a derailleur of the gearshift, a motor member that acts on the articulated quadrilateral mechanism to deform the articulated quadrilateral, and displaces the derailleur and a support element for the motor member associated with the articulated quadrilateral. According to the invention, one of the motor member and the support element comprises at least one jutting element and the other of the motor member and the support element comprises at least one seat adapted to receive said jutting element. Thus, the motor member is associated with the support element so as to prevent mutual translations in the axial direction in any operating or climatic condition.

Abstract: A system and a method for securely connecting, or interlocking two pole sections together to ensure that they do not disconnect during use. The system includes a tubular female end portion of the first pole section and a male end portion of the second pole section that is insertable into the female end portion. The system additionally includes a locking nut threadingly engaged with the male end portion that is rotatable on the male end portion to longitudinally transition the locking nut into contact with the female end portion to fixedly interlock the male and female end portions. Furthermore, the system includes a biased locking sleeve assembly slidably and rotatably mounted on a locking assembly portion of the second pole. The locking sleeve assembly can include a locking sleeve and a biased plunger slidingly positioned within an interior of the locking sleeve for applying a locking force to the locking nut.

Abstract: An exemplary support structure includes a support body, a connecting body, and a rear board. The connecting body is fixed on the support body. The rear board is rotatable relative to the support body. The rear board defines a through hole therein. The connecting body forms a latch protrusion. When the support body is located at a first position, the latch protrusion is capable of passing the through hole of the rear board. When the support body and the latch protrusion are located at opposite sides of the rear board, and the support body rotates past the first position, the latch protrusion resists the rear board and prevents the support body detaching from the rear board.

Abstract: A mast arrangement having two elongate individual masts. The first elongate individual mast comprises a hollow connector comprising an inner diameter. The second elongate individual mast comprises a protruding connector end. The protruding connector end telescopically engages with the hollow connector end. The mast arrangement also comprises a pin and slot arrangement and collars to connect the masts together and minimize unwanted disengagement of the masts from each other.

Abstract: A surgical stapling device has an elongated body and a removable loading unit and a securing structure for securing the loading unit onto the elongated body. Guiding ramps guide the movement of the loading unit as it is mounted onto the elongated body. A movable yoke secures the loading unit onto the elongated body. A sensor mechanism is engaged by the loading unit and moves with the securing structure. The locking structure has a first position for blocking movement of the sensor mechanism and preventing removal of the loading unit. The locking unit has a second position for allowing the loading unit to be removed from the device.

Abstract: The present disclosure relates to a pin lock device allowing detachable attachment of an anti-moisture film or a shield protective film to a surface of a shield secured to a helmet main body in an openable/closable manner and a helmet including same.

Abstract: A shelving unit includes a support frame and at least one support board detachably mounted on the support frame. The support frame includes a back board which has at least one support rail which is provided with at least one locking slot. The shelving unit further comprises at least one locking knob mounted on the support board and detachably locked in the locking slot of the back board. The support board can be mounted on and detached from the support frame. Thus, the user only needs to rotate the locking knob to lock the support board onto the back board or to unlock the support board from the back board, so that the support board is mounted on and detached from the back board easily and quickly without using tools and saving a considerable amount of time for a user.

Abstract: An intramedullary nail and a targeting and/or nailing instrument includes a connector end which has an axially parallel projection which cooperates with an axially parallel recess on the hollow connection end of the nail. The engagement of the projection and recess fastens the nail under axial engagement on the connection end of the instrument in predefined rotational position on the instrument. A quick-fastener element engages in the connection end of the nail and has a first coupling element and the connection end of the nail has a second coupling element. The coupling elements are configured so that in a first rotational position relative to the axially parallel projection the instrument can be introduced into the connection end of the nail and in a second rotational position the coupling elements cooperate so that the nail is held axially fixedly on the instrument.

Abstract: A telescopic flagpole for reducing the manual force required to extend and secure multiple segments. The flagpole includes a plurality of segments including a bottom segment, at least one intermediate segment, and a top segment; a plurality of sleeve assemblies each positioned between an associated pairing of a relatively lower segment and a relatively higher segment; and a plurality of biasing members each urging an associate one of the segments toward an extended position.

Abstract: A fan assembly comprises a frame and a securing element. The frame has a first end portion, a second end portion and a middle portion. The foam securing element comprises a positioning hole having a first hole having a shape corresponding to the first end portion, a second hole having a shape corresponding to the second end portion, and a third hole having a cross section larger than that of the second hole. When the second end portion is inserted into the first hole, the second end portion and the middle portion pass through the first hole and the first end portion urges against the periphery of the second hole to receive the second end portion in the third hole. The second end portion of the frame is stopped by a periphery of the positioning hole after rotating at a predetermined angle so that the frame is positioned.