EP0538503B1 - A rotary-cam ball-point pen - Google Patents
A rotary-cam ball-point pen Download PDFInfo
- Publication number
- EP0538503B1 EP0538503B1 EP19910117922 EP91117922A EP0538503B1 EP 0538503 B1 EP0538503 B1 EP 0538503B1 EP 19910117922 EP19910117922 EP 19910117922 EP 91117922 A EP91117922 A EP 91117922A EP 0538503 B1 EP0538503 B1 EP 0538503B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- rotary
- bar
- projections
- outer sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
- B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
- B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
- B43K24/084—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons with saw-like or analogous cams
Definitions
- the present invention relates to a rotary-cam ball-point pen in which a refill pen point can be pushed out of the head member of the ball-point pen against the elasticity of an elastic body by knocking the rear end of the ballpoint pen.
- the ball-point pen can be maintained with the pen point pushed out of the head member of the ball-point pen, by a rotary-cam engaging a cam body.
- the pen point can be withdrawn into the head member of the ball-point pen by the elasticity of the elastic body by releasing the engagement of the rotary-cam with the cam body.
- a conventional rotary-cam ball-point pen as it is described for example in FR-A-1156612 and EP-A-0407002 has an outer sleeve, a rotary-cam mechanism comprised of a cam body provided on the inside of the outer sleeve, a rotary-cam engaging the cam body, and a cam bar engaging the rotary-cam.
- a refill, being a rear portion is loaded backward by a spring provided between the head member screwed on the forward end of the outer sleeve and a spring bearing formed on the refill so that the rear portion of the refill is forced into the rotary-cam.
- the ball-point pen according to EP-A-0407002 which represents the prior art as referred to in the pre-characterising portion of claim 1, shows a rotary cam follower provided with axially extending ribs being inserted into respective grooves of a stationary cam. Additionally a knocking rod of the ballpoint pen is provided with projections extending axially outwardly and being inserted in respective guide slots or slits in the cylinder of the pen in order to ensure a stable action of the knocking rod.
- said projections may be in the form of a peripheral flange extending around the entire outer surface of the knocking rod.
- said guiding slots or slits are replaced by a cylindrical recess. But this makes it necessary to take additional measures to limit rotation of the knocking rod within the cylinder.
- a rotary-cam ball-point pen has the above-mentioned structure, when the rotary-cam mechanism and refill are set in the outer sleeve, the rotary-cam mechanism and refill are inserted from the forward end of the outer sleeve in a state where the rear portion of the refill is inserted into the rotary-cam, an elastic body is put on the forward portion of the refill, and the head member is screwed on the forward end of the outer sleeve by which the rotary-cam, the refill, the elastic body and the head member are set up.
- the cam bar is inserted into the outer sleeve from the rear end of the outer sleeve, while the cam bar is deformed inward by the elasticity of the cam bar, which elasticity enables the projections of the cam bar to get over the rear portion of the cam body into grooves of the cam body by which the attachment of the cam bar to the cam body is made.
- the number of parts is decreased, and less time is required for assembly of parts.
- the cam body may be provided with a guide, which guides the projections of the cam bar.
- the guide guides the projections of the cam body.
- the cam bar may be formed with slits, slots or cuts.
- the slits, slots or cuts give flexibility to the cam body so that the cam bar can deform inward by applying a radial force to get over the rear portion of the cam body and go into the grooves of the cam body.
- a rotary-cam ball-point pen comprises outer sleeve 1, and cam mechanism 5 comprised of cam body 2 provided on the inside of the rear part of outer sleeve 1, Rotary-cam 3 engages cam body 2 and cam bar 4 engages rotary cam 3, and refill 7.
- Cam body 2 may be formed integrally with outer sleeve 1 or cam body 2 may be attached to the inside of outer sleeve 1 by a force fit, adhesion, or screwing.
- Spring 6 is provided between spring bearing 14 on refill 7 with its rear, end is inserted in to rotary cam 3 and head member 13 removably screwed on the forward end of outer sleeve 1. The attachment of head member 13 to outer sleeve 1 is made by insertion, engagement, or screwing.
- Cam bar 4 has a structure with flexibility in which the cam bar can be distorted inward by applying a radial force.
- the number of projections 84 of cam bar 4 equals the number of grooves 9 of cam body 2, for example 9, but usually less than 6, or for example 2(Figs 3(a) and (b) ). Pairs of projections are diametrically opposed.
- the number of projections 163 of rotary cam 3 is 3 in this case (Figs. 3(a) and (b) ).
- cam faces 174 of cam bar 4 engage cam face 183 of rotation cam 3, and projections 84 of cam bar 4 and projections 163 of rotary-cam 3 are inserted into grooves 9 of cam body 2. Further, the engagement of cam face 183 of rotary cam 3 with cam face 192 of cam body 2, and the insertion of projections 163 of rotary-cam 3 into grooves 9 of cam body 2 are alternatively made.
- Reference number 21 designates a clip formed integrally with cam bar 4.
- Fig. 2 illustrates in vertical section an important part of a second embodiment which has the same structure as the first embodiment, in which headed cam, body 2 is attached to the inside of the rear end of outer sleeve 1 by screwing.
- cam bar 4 When pen point 20 of refill 7 is drawn into head member 13 of outer sleeve 1, the rear end of cam bar 4 is knocked releasing cam faces 183 of rotary cam 3 from cam faces 192 of cam body 2. Thereafter projections 163 of rotary cam 3 and projections 84 of cam bar 4 are inserted into grooves 9 of cam body 2 while refill 7 is moved backward drawing pen point 20 of refill 7 into head member 13.
- cam bar 4 is inserted into outer sleeve 1 from the rear side it is possible to form a clip 21 from the integral part of cam bar 4 (Fig. 1), or a decoration having a size larger than the outside diameter, or a knocking cap.
- cam body 2 may be provided with guide 10 as shown in Fig. 4 which guides projections 84 of cam bar 4 so that the projections are easily inserted into grooves 9 of cam body 2.
- cam bar may be formed with slit or slot 11(Fig. 3(a) ), or cut 12( Figs. 5 and 6), which facilitates cam bar 4 deforming inward to get over rear portion 15 of cam body 2 to enter into grooves 9 of cam body 2.
- Slits 11 may be slits having one side open.
Description
- The present invention relates to a rotary-cam ball-point pen in which a refill pen point can be pushed out of the head member of the ball-point pen against the elasticity of an elastic body by knocking the rear end of the ballpoint pen. The ball-point pen can be maintained with the pen point pushed out of the head member of the ball-point pen, by a rotary-cam engaging a cam body. The pen point can be withdrawn into the head member of the ball-point pen by the elasticity of the elastic body by releasing the engagement of the rotary-cam with the cam body.
- A conventional rotary-cam ball-point pen as it is described for example in FR-A-1156612 and EP-A-0407002 has an outer sleeve, a rotary-cam mechanism comprised of a cam body provided on the inside of the outer sleeve, a rotary-cam engaging the cam body, and a cam bar engaging the rotary-cam. A refill, being a rear portion is loaded backward by a spring provided between the head member screwed on the forward end of the outer sleeve and a spring bearing formed on the refill so that the rear portion of the refill is forced into the rotary-cam.
- In the conventional ball-point pen of FR-A-1156612, when the rotary-cam, cam bar, and refill are set in the outer sleeve, the rotary-cam, cam bar and refill are inserted from the forward end into the outer sleeve under a state where the rear portion of the refill is inserted into the rotary-cam with the cam, bar engaging the rotary cam. Projections formed on the cam bar we inserted into grooves formed oil the cam body, a spring is put on the forward portion of the refill, and the head member is screwed on the forward end of the outer sleeve. Therefore it is not easy to set up the rotary-cam mechanism and the refill in the outer sleeve and besides since the cam bar is inserted from the forward side of the outer sleeve, it is impossible for the cam, bar to be provided with, a clip or a decoration having dimensions larger than the outside diameter of the outer sleeve or a knocking-cap being all integral part of the cam bar. Therefore, it is necessary to attach a clip, or a decoration or a knocking cap after setting the cam bar in the outer sleeve. Accordingly, the number of parts is increased, and a long time is required for assembly of parts.
- The ball-point pen according to EP-A-0407002, which represents the prior art as referred to in the pre-characterising portion of
claim 1, shows a rotary cam follower provided with axially extending ribs being inserted into respective grooves of a stationary cam. Additionally a knocking rod of the ballpoint pen is provided with projections extending axially outwardly and being inserted in respective guide slots or slits in the cylinder of the pen in order to ensure a stable action of the knocking rod. - In another embodiment according to EP-A-0407002 said projections may be in the form of a peripheral flange extending around the entire outer surface of the knocking rod. For this embodiment the said guiding slots or slits are replaced by a cylindrical recess. But this makes it necessary to take additional measures to limit rotation of the knocking rod within the cylinder.
-
- It is an object of the present invention to provide an improved ball-point pen in which setting up a rotary-cam mechanism and a refill in an outer sleeve can be easily carried out and a cam bar can be inserted from the rear end of the outer sleeve so that a clip or a decoration or a knocking cap having dimensions larger than the outside diameter of the outer sleeve is possible.
- The above-mentioned object is attained by a rotary-cam ball-point pen according to
claim 1. Further advantageous features are introduced by the dependant claims. - Since a rotary-cam ball-point pen according to the present invention has the above-mentioned structure, when the rotary-cam mechanism and refill are set in the outer sleeve, the rotary-cam mechanism and refill are inserted from the forward end of the outer sleeve in a state where the rear portion of the refill is inserted into the rotary-cam, an elastic body is put on the forward portion of the refill, and the head member is screwed on the forward end of the outer sleeve by which the rotary-cam, the refill, the elastic body and the head member are set up. Thereafter, the cam bar is inserted into the outer sleeve from the rear end of the outer sleeve, while the cam bar is deformed inward by the elasticity of the cam bar, which elasticity enables the projections of the cam bar to get over the rear portion of the cam body into grooves of the cam body by which the attachment of the cam bar to the cam body is made.
- According to the present invention, the number of parts is decreased, and less time is required for assembly of parts.
- In the present invention the cam body may be provided with a guide, which guides the projections of the cam bar. By the guide, the projections of the cam body can be easily inserted into the grooves of cam body.
- Further, in the present invention, the cam bar may be formed with slits, slots or cuts. The slits, slots or cuts give flexibility to the cam body so that the cam bar can deform inward by applying a radial force to get over the rear portion of the cam body and go into the grooves of the cam body.
- The above and other novel festures and advantages of the invention will be more fully understood from the following detailed description and the accompanying drawings.
- In the drawings;
- Fig. 1 illustrates in vertical section a first embodiment of a rotary-cam ball-point pen according to the present invention;
- Fig. 2 illustrates in vertical section an important part of a second embodiment of a rotary-cam ball-point pen;
- Fig. 3(a) illustrates in vertical section a cam bar according to the present invention;
- Fig. 3(b) illustrates in a perspective view a rotary-cam and the cam bar according to the present invention:
- Fig. 4 is a schematic illustration of a cam body according to the present invention;
- Figs. 5 and 6 show another embodiment of a cam bar of the present invention, Fig. 5 being a vertical section thereof and Fig. 6 being a plan view thereof; and
- Fig. 7 shows in vertical section an important part of a third embodiment of a rotary-cam ball-point pen.
- Referring to Fig. 1, a rotary-cam ball-point pen according to the present invention comprises
outer sleeve 1, and cam mechanism 5 comprised ofcam body 2 provided on the inside of the rear part ofouter sleeve 1, Rotary-cam 3 engagescam body 2 andcam bar 4 engagesrotary cam 3, andrefill 7.Cam body 2 may be formed integrally withouter sleeve 1 orcam body 2 may be attached to the inside ofouter sleeve 1 by a force fit, adhesion, or screwing.Spring 6 is provided between spring bearing 14 onrefill 7 with its rear, end is inserted in torotary cam 3 andhead member 13 removably screwed on the forward end ofouter sleeve 1. The attachment ofhead member 13 toouter sleeve 1 is made by insertion, engagement, or screwing. -
Cam bar 4 has a structure with flexibility in which the cam bar can be distorted inward by applying a radial force. The number ofprojections 8₄ ofcam bar 4 equals the number ofgrooves 9 ofcam body 2, for example 9, but usually less than 6, or for example 2(Figs 3(a) and (b) ). Pairs of projections are diametrically opposed. - The number of
projections 16₃ ofrotary cam 3 is 3 in this case (Figs. 3(a) and (b) ). - When the pen point is drawn in,
cam faces 17₄ ofcam bar 4 engagecam face 18₃ ofrotation cam 3, andprojections 8₄ ofcam bar 4 andprojections 16₃ of rotary-cam 3 are inserted intogrooves 9 ofcam body 2. Further, the engagement ofcam face 18₃ ofrotary cam 3 withcam face 19₂ ofcam body 2, and the insertion ofprojections 16₃ of rotary-cam 3 intogrooves 9 ofcam body 2 are alternatively made.Reference number 21 designates a clip formed integrally withcam bar 4. - Fig. 2 illustrates in vertical section an important part of a second embodiment which has the same structure as the first embodiment, in which headed cam,
body 2 is attached to the inside of the rear end ofouter sleeve 1 by screwing. - In the first and second embodiments shown in Figs. 1 and 2
projections 8₄ ofcam bar 4 andprojections 16₃ of rotary-cam 3 are inserted intogrooves 9 ofcam body 2. When the rear end ofcam bar 4 is knocked in a state wherecam faces 17₄ ofcam bar 4 engagecam faces 18₃ of rotary-cam 3,cam bar 4, rotary-cam 3, andrefill 7 are moved, forward againstspring 6 so thatpen point 20 ofrefill 7 is pushed out ofhead member 13 ofouter sleeve 1 whilepen point 20 ofrefill 7 is kept in a state withpen point 20 ofrefill 7 pushed out ofhead member 13 ofouter sleeve 1 by rotary-cam 3 being turned a given degrees by means ofcam faces 17₄engaging cam faces 18₃ so that cam faces 18₃ engagecam faces 19₂ ofcam body 2. - When
pen point 20 ofrefill 7 is drawn intohead member 13 ofouter sleeve 1, the rear end ofcam bar 4 is knocked releasingcam faces 18₃ ofrotary cam 3 fromcam faces 19₂ ofcam body 2. Thereafterprojections 16₃ ofrotary cam 3 andprojections 8₄ ofcam bar 4 are inserted intogrooves 9 ofcam body 2 whilerefill 7 is moved backwarddrawing pen point 20 ofrefill 7 intohead member 13. - When rotary-cam mechanism 5 and
refill 7 is set inouter sleeve 1,refill 7 is inserted intoouter sleeve 1 from the forward end in a state where the rear portion ofrefill 7 is inserted intorotary cam 3,spring 6 is put on the forward portion ofrefill 7, thenhead member 13 is screwed on the forward end ofouter sleeve 1 by whichrotary cam 3,refill 7,spring 6, andhead member 13 are set. Thereafter whencam bar 4 is inserted intoouter sleeve 1 from the rear end ofouter sleeve 1,cam bar 4 deforms inward by the elasticity ofcam bar 4, which enables projections 8 ofcam bar 4 to get over therear portion 15 ofcam body 2 and to entergrooves 9 ofcam body 2 so that the cam bar can be set. In this case,cam bar 4 is deformed inward while therear portion 15 ofcam body 2 is deformed slightly outward, which facilitates settingcam bar 4. - Therefore, since
cam bar 4 is inserted intoouter sleeve 1 from the rear side it is possible to form aclip 21 from the integral part of cam bar 4 (Fig. 1), or a decoration having a size larger than the outside diameter, or a knocking cap. - In the present invention,
cam body 2 may be provided withguide 10 as shown in Fig. 4 which guidesprojections 8₄ ofcam bar 4 so that the projections are easily inserted intogrooves 9 ofcam body 2. - Further, in the present invention, cam bar may be formed with slit or slot 11(Fig. 3(a) ), or cut 12( Figs. 5 and 6), which facilitates
cam bar 4 deforming inward to get overrear portion 15 ofcam body 2 to enter intogrooves 9 ofcam body 2. Slits 11 may be slits having one side open. - This invention is not to be limited to the embodiment shown in the drawing and described in the description, which is given by way of example and not of limitation, but only in accordance with the scope of the appended claims.
Claims (5)
- A rotary-cam ball-point pen comprising an outer sleeve (1), rotary-cam mechanism means (5), said rotary-cam, mechanism means (5) comprising a cam body (2) inside said outer sleeve (1), a rotary-cam (3) engaging said cam body (2), and a cam-bar (4) engaging said rotary-cam (3), the rotary-cam ball-point pen further comprising writing refill means (7) inside said outer sleeve (1) having a rear portion inserted in said rotary-cam (3), said writing refill means (7) being biased toward said rotary-cam (3) by resilient means (6), said cam-bar (4) being constructed of a flexible material so that it can be deformed inward by applying a small radial force to facilitate assembly, characterized in that
said rotary-cam (3) is provided with projections (16₃) being inserted into grooves (9) of cam body (2) and that cam-bar (4) is provided with projections (8₄) also being inserted into said grooves (9) of cam body (2). - The ball-point pen according to claim 1, characterized in that
said projections (8₄) are slidably inserted into said grooves (9) and that the number of grooves (9) does not exceed the number of projections (8₄). - The ball-point pen according to claim 1 or 2, characterized in that
said cam, body (2) includes guide means (10) for said plurality of cam-bar projections (8₄). - The ball-point pen according to any of claims 1 through 3, characterized in that said cam-bar (4) includes at least a slot (11) to assist in assembling said cam-bar (4) in said cam body (2).
- The ball-point pen according to claim 4, characterized in that
said cam bar (4) includes a cut-out around said plurality of projections (8₄) to make said plurality of projections (8₄) deflectable to facilitate assembly.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1991607458 DE69107458T2 (en) | 1991-10-21 | 1991-10-21 | Ballpoint pen with a rotating cam. |
ES91117922T ES2069172T3 (en) | 1991-10-21 | 1991-10-21 | ROTATING CAMERA BALL TIP PEN. |
EP19910117922 EP0538503B1 (en) | 1991-10-21 | 1991-10-21 | A rotary-cam ball-point pen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19910117922 EP0538503B1 (en) | 1991-10-21 | 1991-10-21 | A rotary-cam ball-point pen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0538503A1 EP0538503A1 (en) | 1993-04-28 |
EP0538503B1 true EP0538503B1 (en) | 1995-02-15 |
Family
ID=8207271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19910117922 Expired - Lifetime EP0538503B1 (en) | 1991-10-21 | 1991-10-21 | A rotary-cam ball-point pen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0538503B1 (en) |
DE (1) | DE69107458T2 (en) |
ES (1) | ES2069172T3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1270936B (en) * | 1993-05-12 | 1997-05-16 | Stilolinea Srl | SIMPLIFIED ASSEMBLY BALLPOINT PEN |
DE4326838C2 (en) * | 1993-08-10 | 1996-01-11 | Interelektrik Ges M B H & Co K | Bistable solenoid valve |
JP4425618B2 (en) | 2003-12-08 | 2010-03-03 | 吉田プラ工業株式会社 | Knock type slide case |
JP6608161B2 (en) * | 2015-04-20 | 2019-11-20 | 三菱鉛筆株式会社 | Knock-type writing instrument |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB854313A (en) * | 1955-08-30 | 1960-11-16 | Kahn David Inc | Improvements in or relating to writing instruments |
FR1358869A (en) * | 1963-03-29 | 1964-04-17 | Ideal S R L Minuterie Metallic | Push-button control device for ballpoint pens |
GB1192116A (en) * | 1968-09-04 | 1970-05-20 | Helmut Bross | Writing Instrument |
JPH0753993Y2 (en) * | 1989-07-07 | 1995-12-13 | 株式会社パイロット | Cursive appearance mechanism |
-
1991
- 1991-10-21 ES ES91117922T patent/ES2069172T3/en not_active Expired - Lifetime
- 1991-10-21 EP EP19910117922 patent/EP0538503B1/en not_active Expired - Lifetime
- 1991-10-21 DE DE1991607458 patent/DE69107458T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0538503A1 (en) | 1993-04-28 |
ES2069172T3 (en) | 1995-05-01 |
DE69107458D1 (en) | 1995-03-23 |
DE69107458T2 (en) | 1995-06-22 |
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