Patent Application
20180215194
This application pertains to a writing implement and in particular a ball pen according to the preamble of claim 1.
Usually, ball pens include a housing, a writing means that is spring-loaded therein, e.g. a ball pen refill or a high-capacity refill, and an adjustment mechanism. At an operating side ball pens comprise an operating unit, wherein the ball pen may either operated by a push button arranged at the operating unit or through rotating the operating unit itself. In the case of a rotating operating unit it usually locks in a first or a second operating position after manipulating it, depending on the direction of rotation. In doing so, in the first operating position the ball pen refill is in a pushed-forward writing position, such that the tip of the writing means reaches out of the housing. In a second operating position the writing means is retracted into the housing in a storing position, in which the writing means is fully received by the housing. Ball pens of this type are elaborately described in the prior art.
For example, U.S. Pat. No. 2,624,314 describes a ball pen having a retractable ball pen refill, which can be manipulated through an operating button. When the operating button is pressed down, an adjustment mechanism locks, such that the tip of a writing means projects out of the housing. A repeated pressing down releases the locking of the adjustment mechanism and the writing means is pushed back into a retracted storing position through a spring.
Patent publication DE 103 32 844 describes a manual writing implement, which comprises both a writing refill as well as an input pen. Through rotation of a rear housing element a displacement mechanism is operated, which pushes a writing refill forward in an axial direction, while at the same time an input pen is moved into a retracted storing position. Through rotation of the rear housing element into an opposite direction the input pen is pushed forward in the axial direction, while at the same time the writing refill is moved into a retracted storing position. For this, a cam pin for moving the writing refill and a further cam pin for moving the input pen are mechanically connected to a cam bushing having slot-shaped guiding cams. The slot-shaped guiding cams of the cam bushing are arranged one upon the other and thereby run in a helical shape in opposite directions to each other. Between a first and a second operating position both the input pen and the writing refill are in a storing position retracted in the housing.
At the writing instruments disclosed in the prior art the operating unit at a rear end of the housing in each case remains in the operating position to which it was switched. This may be disadvantageous, in particular with precious writing implements with prints on the housing, high-grade ornaments or elaborate engravings, since through locking the housing halves that are rotated relative to each other in an operating position, the patterns on the writing implement are not coherent any more, which may change the general appearance of the writing implement in an adverse manner. In addition, other objects, desirable features and characteristics will become apparent from the subsequent summary and detailed description, and the appended claims, taken in conjunction with the accompanying drawings and this background.
It may therefore be considered an object of the disclosure to propose a writing implement, at which a coherent, outer appearance is achieved.
This object is met by a writing implement having the features of independent claim 1. Advantageous embodiments and further improvements can be gathered from the sub claims and the following description.
It is proposed a writing implement, comprising a housing for receiving a writing refill along a longitudinal axis, an operating side and a writing side, an adjustment mechanism supported in the housing, having a guide bushing and a cam pin concentrically arranged therein and spring-loaded along the longitudinal axis on the writing refill, which cam pin is engageable with an end of the writing refill, wherein the cam pin is bringable into at least two locking positions, which are offset along the longitudinal axis. The writing implement further comprises a control arrangement having a resetting device, a freewheel couplable with an operating unit arranged at the operating side and a cam bushing coupled with the freewheel. The cam bushing comprises a gliding surface curved at one side for a contacting surface of the cam pin. The contacting surface may be designed in form of a protrusion. The resetting device exerts a resetting force onto the operating unit. The freewheel is a first rotatably supported body having a circumferential recess and forms an operative connection at least in a region with a second body that is rotatably supported and concentrically thereto. One of the first rotatably supported body and the second rotatably supported body is freely rotatable around its longitudinal axis in a first angle range and transfers a rotation from the operating unit to the cam bushing outside of this first angle range.
Hence, the writing implement differs from known writing implements and in particular from ball pens having a rotation mechanism through the control arrangement, which comprises the resetting device, the freewheel and the cam bushing. By the control arrangement it is possible to bring the operating unit after manipulating and locking the writing refill back into a neutral position, without changing the adjusted position of the writing refill. Through the resetting device a resetting force acts upon the operating unit, which resetting force resets the operating unit into its original position after manipulating it.
The cam bushing is a device, which transforms a rotating motion initiated by the operating unit into an axial motion. The cam bushing may thereby move the cam pin and, consequently, the writing refill in an axial direction, wherein the cam pin comprises at least one contacting surface, preferably in form of a protrusion, which is guided at the gliding surface.
The cam bushing preferably comprises a helix-type shape having locking recesses offset from each other in an axial direction, which are connected to each other through a gliding surface curved on one side. The locking recesses are adapted for receiving a protrusion of the cam pin, which is guided along the gliding surfaces.
Through the shape of the locking recesses, which is arched and semicircular opposite to the writing side, a protrusion that has entered a locking recess can only exit the locking position through overcoming a force acting upon the writing refill given by the shape of the locking recess and the gliding surfaces, respectively, and of the resistance determined by the resetting force, through rotation of the cam bushing. A force that acts upon the writing refill and, consequently, upon the cam pin, in the direction of the operating side cannot move the writing refill to the operating side.
The freewheel may selectively allow or prevent a transfer of torque between the operating unit and the cam bushing. Thereby it is simultaneously prevented to move the writing refill from its extended or retracted position into the respective other position, if the operating unit is rotated back into a neutral position. The implementation of the freewheel is preferably accomplished in a way that a reliable transfer of torque is conducted but that also a high resetting precision of the operating unit is achieved at the same time.
Preferably, the freewheel has an elongate, cylindrical shape having a recess, which extends about a part of the circumferential surface. The recess may thereby be shaped differently and may extend over the complete longitudinal axis of the freewheel or merely in one or multiple subsections of the freewheel.
Preferably, the recess of the freewheel is capable of receiving a second body, which is concentrical thereto and rotatably supported. It preferably comprises an elongate, web-like protrusion having at least one first contacting surface and a second contacting surface and is integrated into the inner housing side of the operating unit. At a rotational motion of the second rotatably supported body exceeding the angle range of the recess of the freewheel, the freewheel will be entrained by the protrusion of the second rotatably supported body through a surface contact between the recess and the second contacting surface of the protrusion of the second boy and rotated with it about the longitudinal axis. Within the angle range of the recess of the freewheel the second rotatably supported body is freely rotatable.
In a further embodiment the second rotatably supported body may comprise other shapes, such as the shape of a short, compact protrusion. Furthermore, in a further embodiment the recess may be integrated into the inner side of the housing of the operating unit and the freewheel may comprise a protruding body instead of a recess, preferably in form of a protrusion or a web, and is resultantly based on a kinematic inversion.
Due to the resetting device of the writing implement, the position of the operating unit is always independent of the locking position of the writing implement, such that ornaments, which are possibly arranged on the outer side of the housing of the writing implement and, resultantly, the overall appearance of the writing implement are not disturbed.
In a further embodiment of the writing implement the resetting device comprises a spring mechanism, at which a spring force acts upon the operating unit and resets it into an original base or ground position. The resetting force may be realized by leaf springs, coil springs, magnets, rubber elements or similar. The forces resulting from the spring mechanism may hereby act both in a parallel direction to the longitudinal axis and a transverse thereto.
According to a further embodiment the resetting device comprises a cam bushing and a second body that is rotatable concentrically thereto, which rotate the operating unit after a manipulation back into a neutral position. The cam bushing or the second concentrically rotatable body is spring-loaded. The second body concentrically rotatable may inter alia be realized as a separate protrusion. A further option is a combination of the freewheel's concentrically rotatably supported second body and the resetting device's concentrically rotatably supported second body in form of a mutual, elongate or web-shaped body having a first and a second contacting surface. It may be integrated fixedly at the innerr side of the housing of the operating unit e.g. by gluing, welding, under using of plug connections or similar or may constitute a part of the housing itself. Furthermore, the cam bushing or the protrusion may be spring-loaded. This enables the installation of the resetting device either into the housing or into the operating unit. Preferably, the operating unit is realized in form of a cap or a component similar to a cap that is not detachable, which is arranged at the operating side of the writing implement.
In a further embodiment of the writing implement the cam bushing is integrated into the housing in a rotation-proof manner and movable along the longitudinal axis. By this, a force that acts parallel to the longitudinal axis is directed to the operating unit, preferably in form of the second concentrically rotatable body, through inclined planes at both sides of the cam bushing, and generates an axially acting force. Exemplarily, the cam bushing may comprise a protrusion, which can be arranged in a preferably elongate recess in form of a slot and which is movable in it in a direction along the longitudinal axis. A rotational motion of the cam bushing can thereby be prevented. The cam bushing may inversely comprise a recess with an elongate shape, in which a body is arrangeable that is movable along a longitudinal axis. The rotationally fixed cam bushing allows a particularly compact design of the writing implement.
According to a further embodiment the guide bushing comprises a first gliding surface in form of a recess, exemplarily in the shape of a first slot, and the cam bushing comprises a protrusion that is shaped so as to correspond with the recess. By this, the guide bushing creates a glide rail along the longitudinal axis, with which the protrusion of the cam bushing engages and along which the cam bushing can glide. This allows the cam bushing to glide along the guide bushing in a rotation proof manner, such that an interference-free force transfer is accomplished.
In a further embodiment the guide bushing comprises a second gliding surface in form of a second recess, for example in the shape of a second slot, for receiving a protrusion of the cam pin. The cam pin is arranged in a rotation-proof manner in the housing, but movable in the direction of the longitudinal axis by the second recess and the protrusion that is movably supported in the direction of a longitudinal axis therein. The first and second recess of the guide bushing may either independently or combined be a component of the guide bushing; however, they do not have to be compulsorily integrated into the guide bushing.
In a further embodiment the cam bushing comprises a glide surface for a first contacting surface of the second concentrically rotatable body, which is preferably of an elongate shape. Preferably, the second concentrically rotatable body is realized in the form of a web, which is integrated into the operating unit, in particular a cap or a component similar thereto. The web may be designed in such a manner that it assumes an operative connection in form of a linear or surface contact both with the cam bushing and with the free wheel. Furthermore, it may also be possible to design the protrusions as individual, protruding bodies. The gliding surface of the cam bushing may be shaped straight, curved or the such depending on the requirement. This allows an individual and/or particularly space saving option for a force transfer.
According to a further embodiment the cam bushing comprises two sloped planes that run towards each other. The sloped planes may thereby comprise the same length or different lengths. In running towards each other they create a lowest common point, which at the same time corresponds to the neutral position of the writing implement. The cam bushing is shaped straightly on the sie opposed to the sloped plane and is thus suitable as a contacting surface for a spring mechanism. By the spring force that acts onto the underside of the cam bushing, a force is transferred onto the gliding surfaces of the cam bushing, which in turn is transferred onto the second rotatably supported body and urges it into the lowest common point of the sloped planes of the cam bushing, i.e. into the neutral position of the writing implement.
In a further embodiment the first rotatably supported body of the freewheel having the circumferential recess comprises a rotation-proof connection with the cam bushing. For this, the cam bushing comprises a detent on an outer surface at a side of the cam bushing opposite to the gliding surfaces. The first rotatably supported body of the freewheel comprises a corresponding detent at the inner side. By gluing, welding or locking in place of the cam bushing with the first body of the freewheel, a force that act onto the freewheel is transferable onto the cam bushing and vice versa.
In a further embodiment the rotatably supported body of the freewheel having the circumferential recess comprises an elastic connection with the cam bushing. The cam bushing and the rotatably supported body of the freewheel are thereby connected through an elastic component, preferably made from a flexible or rubber-like material such as elastomers. Due to the slightly elastic connection of the rotatably supported body of the freewheel and the cam bushing the force transfer during a rotation of the operating element is somewhat delayed, such that a slight resistance is perceptible for a user before activation of the writing implement.
According to a further embodiment the rotatably supported body of the freewheel comprises a protruding second contacting surface and the second rotatably supported body comprises a corresponding recess. The protruding second contacting surface of the freewheel and the recess of the second rotatably supported body correspond to each other, such that both components form an operative connection, if the protruding second contacting surface is rotated so far to exceed the angle range of the recess.
According to a further embodiment the second contacting surface of the second rotatably supported body comprises the shape of a web at the inner side of the operating unit. The second rotatably supported body corresponds to the recess of the rotatably supported body of the freewheel. In a further embodiment the second body, which is realized with a web shape, serves for a transfer of force onto the gliding surface of the cam bushing.
According to a further embodiment, the neutral position of the operating unit is arranged in the angle range of the recess of the freewheel. The second rotatably supported body may be freely rotation in the angle range of the recess of the freewheel, without influencing the control arrangement or the resetting device. During a rotation to exceed the angle range a force transfer onto the control arrangement and the resetting device is conducted.
In a further embodiment the operating unit is created in the form or a rotating element, an actuation button, a rocker or a slider. The different actuation alternatives may thereby be versatile. The various actuation variations may be resetted after actuating the writing implement into an original neutral position through the writing implement according to the invention.
According to a further embodiment, the control arrangement having the resetting device is received by the operating unit at the inner side. This allows to realize a particularly compact arrangement of components and allows an appealing design of the writing implement.
Embodiments of the present invention will hereinafter be described in conjunction with the following drawing figures, wherein like numerals denote like elements, and:
The following detailed description is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description.
The writing implement 2 comprises a one-piece or multipart housing 4, into which a writing refill 6 is arranged along a longitudinal axis 8. The writing implement 2 comprises an operating side 10 and a writing side 12. A spring-loaded writing refill 6 is arranged in a hollow space of the housing 4. An operating unit 24 is present at the operating side 10 of the writing implement 2. A cam pin 16 is arranged in the operating unit 24, which cam pin is suitable for receiving the writing refill 6 and for latching into multiple locking recesses. The cam pin 16, the cam bushing 26 and the writing refill 6 together are partially enclosed by a guide bushing 14, around which a spring mechanism 36 is arranged. The spring mechanism 36 exerts a force onto a cam bushing 38, which surrounds the cam pin 16, the cam bushing 26 and the guide bushing 14.
The guide bushing 14 comprises a first gliding surface 39 in form of a recess, which is exemplarily realized as a slot, which recess receives a correspondingly shaped protrusion 42 of the cam bushing 38. Consequently, the cam bushing is rotation-proof, but is supported to be movable in a direction along a longitudinal axis in the operating unit 24. Furthermore, the cam bushing 14 comprises a second gliding surface 40 in form of a recess, which is exemplarily shaped as a slot, which receives a protrusion 62 of the cam pin 16 and thereby prevents a possible rotation of the cam pin 16, but allows a movement of the cam pin in a direction along a longitudinal axis. A circumferential, sloped plane of the cam bushing 38 borders on a protruding body 32 of an elongate shape, which is integrated into the operating unit 24. Additionally, in a preferred embodiment the protruding elongate body 32 borders on a body of a freewheel 22, which body is supported concentrically to the longitudinal axis 8 that comprises a recess, which extends over a first angle range.
The cam bushing 38 comprises a two-sided, sloped plane 48, 50, which serves as a gliding surface for a first contacting surface 46 of the second body 32, which is supported so as to be rotatable relative to the cam bushing 38 and which is integrated into the operating unit. The second body 32, which is rotatably supported relative to the longitudinal axis 8 and which has a first contacting surface 46 and a second contacting surface 47, is freely rotatable in the first angle range of the first rotatably supported body of the freewheel 22, which first angle range is limited by a recess. A rotational motion of the operating unit 24 exceeding the angle range of the recess 30 of the freewheel leads to entraining the freewheel 22 and thus to a rotation of the cam bushing 26, such that the protrusion 62 of the cam pin 16 enters different locking recesses 56, 58 of the cam bushing 26 through gliding surfaces 28. By this, a movement of the cam pin 16 along the longitudinal axis 8 of the writing implement 2 results, which transfers onto the writing refill 6. Hereby, the cam pin 16 in a slot is secured against a rotation through its protrusion 62 in the guiding bushing 14 (see
The rotation of the operating unit 24 may be conducted bidirectionally, wherein a rotation in a first direction pushes the writing refill 6 out of the housing 4 and locks it in an operating position, and the rotation in a second direction releases the locking and places the writing refill 6 in a storage position in the housing 2. A neutral position of the operating unit 24, in which the control arrangement is neither locked nor unlocked, is preferably located centrally between a position of the operating unit 24, in which a locking of the writing refill 6 is conducted, and a position of the operating unit 24, in which the locking of the writing refill 6 is released. In a further embodiment the neutral position may also be placed in another circumferential position.
The cam pin 16 and the cam bushing 26 are partially enclosed by the guide bushing 14, which comprises an elongate first gliding surface 39, preferably in form of a rail-like, elongated slot, in the position of the overlap of cam pin 16 and cam bushing 26. The guide bushing 14 is surrounded by a spring mechanism 36 and a cam bushing 38, wherein the spring mechanism borders on a straight side of the cam bushing 38. Preferably, the latter comprises a protrusion 42, which engages with the first gliding surface 39 of the guide bushing 14 and which is displaceable therein in the longitudinal direction 8. Preferably, the guide bushing comprises a second gliding surface 40 in form of a slot, which is compatible to the protrusion 62 of the cam pin 16. Thus, on the application of a force it is prevented that the cam bushing 38 and/or the cam pin 16 are rotated, but they may still be displaced in a direction along a longitudinal axis. Thus, the spring-loaded cam bushing 38 is arranged in the operating unit 24 in a rotation-proof manner. A force acting onto the gliding surface 44 of the cam bushing 38, exemplarily emanating from an elongated, web-like body 32 fixedly arranged in the operating unit 24 based on the first contacting surface 46, therefore causes the cam bushing 38 to move away in the direction of the longitudinal axis.
The circumferential recess 30 comprises a first angle range of exemplarily 180° around the longitudinal axis of the body 22. The second body 32, which is rotatably supported around the longitudinal axis 8 of the writing implement 2 and arranged at an inner side of the housing 4 of the operating unit 24, is positionable in the circumferential recesses of the first body 22. With a rotation exceeding the angle range of preferably about 90° of the circumferential recess 30, the first rotatably supported, cylinder-shaped body 22 having a circumferential recess 30 is caused to rotate by the second, web-like body 32.
While at least one exemplary embodiment has been presented in the foregoing detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the invention as set forth in the appended claims and their legal equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2015 009 814.4 | Jul 2015 | DE | national |
This application is a U.S. National-Stage entry under 35 U.S.C. § 371 based on International Application No. PCT/EP2016/068020 filed Jul. 28, 2016 which was published under PCT Article 21, and which claims priority to German Patent Application No. 102015009814.4, filed Jul. 28, 2015, which are all hereby incorporated in their entirety by reference.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2016/068020 | 7/28/2016 | WO | 00 |
