GB2117472A - Mechanism for retaining two members in two different relative positions - Google Patents
Mechanism for retaining two members in two different relative positions Download PDFInfo
- Publication number
- GB2117472A GB2117472A GB08208712A GB8208712A GB2117472A GB 2117472 A GB2117472 A GB 2117472A GB 08208712 A GB08208712 A GB 08208712A GB 8208712 A GB8208712 A GB 8208712A GB 2117472 A GB2117472 A GB 2117472A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cam follower
- arm
- retaining parts
- groove
- retaining
- 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.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
- E05C19/02—Automatic catches, i.e. released by pull or pressure on the wing
- E05C19/022—Released by pushing in the closing direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/14—Mechanisms with only two stable positions, e.g. acting at definite angular positions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
- Toys (AREA)
Abstract
A push-push mechanism for retaining first and second members, which are movable relative to each other against a bias, in two different relative positions, such that application of external pressure moves the two members from a first position to a second position against the bias. Upon release of this pressure the members are retained in this second position until further external pressure is again applied and released, at which time the members are urged by the bias to resume the first position. The mechanism comprises a cam follower (8), attached to the first member (1), a cam track (9) having first and second cam follower retaining parts, at least one guide path for the cam follower interconnecting the first and second retaining parts connectable to the second member, and biasing means (3), for biasing the first and second members such that the cam follower is urged into either one of the cam follower retaining parts. The guide path or guide paths are constructed such that the cam follower is constrained to move alternately between the cam follower retaining parts as the two members are moved relative to each in a reciprocating manner by the intermittent application of external pressure. <IMAGE>
Description
SPECIFICATION
Mechanism for retaining two members in two different relative positions
This invention relates to a mechanism for retaining two members, which are movable relative to each other, in first and second positions.
According to the broadest form of the invention, there is provided a mechanism for retaining first and second members, which move relative to each other, in a first and a second position, comprising.
(a) a cam follower connectable to the first member,
(b) a cam track having first and second cam follower retaining parts and at least one guide path for the cam follower interconnecting the first and second retaining parts connectable to the second member, and
(c) biasing means for biasing the first and second members such that said cam follower is urged into either one of the cam follower retaining parts, and wherein the or each guide path is constructed to guide the cam follower alternately from one cam follower retaining part to the other as the first and second members are moved relative to each other against the biasing means, in a reciprocating manner.
According to a particular form of the invention, there is provided a reciprocable device having two relatively slidable portions which can move between first and second positions, comprising
(a) a cam follower connected to the first portion,
(b) the second portion having first and second cam follower retaining parts and at least one guide path for the cam follower interconnecting the first and second retaining parts, and
(c) biasing means for biasing the first and second portions such that the cam follower is urged into either one of the cam follower retaining parts, and wherein the or each guide path is constructed to guide the cam follower alternately from one cam follower retaining part to the other as the first and second members are moved relative to each other against the biasing means in a reciprocating manner.
Preferably, the cam follower is attached to or integral with a cam follower arm which is attached to the first portion. The guide path may be in the form of at least one groove and at least one step may be provided in the base of the or each groove such that the or each step co-operates with the cam follower to ensure that the cam follower moves alternately from one of the cam follower retaining parts to the other as the first and second portions are moved relative to each other against the biasing means, in a reciprocating manner. Provision may be made to bias the cam follower against the base of the groove.
Further preferred is a device in which the cam follower arm is pivotally attached to the first portion, the cam follwer arm being formed of a resilient material such that it can flex in a plane at right angles to its swinging plane.
Particular applications for the device are as a door handle and as an article for amusement. When adapted for use as an article for amusement (i.e. a toy), the exterior of the first portion may be shaped and painted to resemble a head which may then be caused to reciprocate within the second portion (which may be similarly shaped and painted to resemble a body) by applying manual pressure.
One embodiment of the invention is now described by way of example with reference to the accompanying drawings, in which:
Figure 7 is a part cut-away view of a reciprocating device;
Figure 2 is a perspective view of a typical cam track or guide path in the form of a groove in part of a base portion of the device;
Figure 3 is a section on the line A-A of Figure 2 but also indicating the manner in which a cam follower on a further portion of the device is offered up to the guide groove;
Figure 4 is a schematic view showing the various positions of the cam follower in the guide groove during a complete reciprocating cycle of the device;
Figure 5shows the device in use as a door knob, and
Figure 6 shows the device in use as an article for amusement.
Referring to the drawings, a cylindrical first portion 1 is received within a second cylindrical (base) portion 2 and is constrained so as just to slide axially relative to the base portion 2 (e.g. by splines, not shown), the two portions being biased apart by a helical spring 3 which bears against two plates 4 and 5, plate 4 being attached to first portion 1, and plate 5 being attached to second portion 2. (The plates may be integral with their respective portions).
A cam follower arm 6 is pivotally connected to a block on the underside of the plate 4 of the first portion 1 about a pivot 7 and has a cam follower 8 on its free end which runs in a guide path or groove 9 formed, as will be described, on the base portion 2.
The cam follower arm 6 is manufactured from a resilient material (for example a plastics material) and is so shaped that it has some springiness in the direction perpendicular to the plane of movement allowed by the pivot 7, thus providing a bias ensuring that the cam follower 8 remains in contact with the base of the guide groove 9.
The guide groove 9 is formed in a block 10 which is attached to, but may be integral with, the plate 5 of the base portion 2. In this embodiment, the guide groove is generally heart shaped with its two lobes 11 and 12 situated furthest away from the pivot 7 of the cam follower arm 6.
The guide groove 9 is provided with a series of steps 13, 14, 15 and 16 in its base which co-operate with the cam follower 8 to ensure that the cam follower moves alternately from one cam retaining part to the other (positions 17 and 19, Figure 4) as the two portions 1,2 are reciprocated relative to each other.
A complete operating cycle of the mechanism will now be described to elucidate further the manner in which the components co-operate.
In the fully extended position (as depicted in
Figure 1) the two portions 1 and 2 are biased apart by the action of the helical spring 3 bearing on the end plates 4 and 5. Movement of the first portion under the bias of the spring 3 is constrained, however, by the co-operation of the cam follower 8 in cam follower retaining part 17. As external pressure is applied to the device, causing the two main portions to slide together against the bias provided by the spring 3, the cam follower 8 at the end of the cam follower arm 6 is forced to travel down the guide groove 9, i.e. in the direction shown by the arrow in
Figure 4. The cam follower is prevented from moving down the other section of the guide groove 9 by step 16 which co-operates with the cam follower allowing only the motion towards position 18.The guide groove 9 becomes progressively shallower, from position 17 to position 18 so that the motion of the cam follower in this direction pushes it outwardly (with respect to the plane at the paper in Figure 4) against the bias provided by the cam follower arm.
This bias ensures that as the cam follower passes over the downward step 13 it is urged back against the base of the guide groove 9. When the cam follower reaches position 18, the portion 1 cannot move any further in the same direction within the portion 2 under the influence of external pressure because of co-operation between the cam follower and the side of the groove. Upon cessation of the external pressure, the spring bias moves the two portions 1 and 2 apart again which consequently causes the cam follower 8 to move upwardly aiong the guide groove to position 19. It is prevented from returning to position 17 by the co-operation of the cam follower with step 13. The cam follower traverses downwards step 14 before reaching position 19 and the cam follower is again urged towards the base of the guide groove 9 by the bias supplied by the cam follower arm 6.Position 19 is the second cam follower retaining part of the guide groove, retaining the cam follower as it does against the bias of the spring 3 which in turn maintains the two portions in the retracted position. When external pressure is again applied to the two portions 1 and 2, the cam follower is caused to move from position 19 to position 20, being prevented from returning to position 18 by the co-operation of the cam follower with step 14. The cam follower traverses downwards step 15 before reaching position 20. Position 20, in common with position 18, limits the extent of the slidable motion caused by the application of external pressure. When the external pressure is released, the two portions slide apart and the cam follower 8 moves from position 20 to position 17.The guide groove becomes progressively shallower from position 20 to position 17 so that the motion of the cam follower in this direction pushes it outwards against the bias provided by the cam follower arm 6. The cam follower traverses downwards step 16 before reaching position 17 and the cam follower is again urged towards the base of the guide groove by the bias provided by the cam follower arm.
Figures 5 and 6 exemplify two possible applications for the device described above.
Figure 5 shows a door, especially a door in a caravan, yacht or any such place where cramped living conditions are provided. The present invention may be utilised as an extendable means for gaining purchase on a door in order to open it. For example, if one of the portions 1, 2 of the device described herein were fixed to and embedded in a door panel, then when the device was in its extended position, a useful knob would be presented with which to open the door. Simply by pushing the knob in, it could, for example, become flush with the door panel and remain in this retracted position until a further push releases the mechanism and allows the knob to protrude.
Figure 6 is an example of the type of amusement article, e.g. a toy, which can be manufactured, using as a major part the mechanism the subject of the present invention.
The device described above need not be a purely reciprocating device. Instead, the cam track could, for example, be connected to one end of an arm, the other end of which is pivotally connected to a second arm, and the cam follower could be connected to the opposite end of this second arm. In this way, the resultant mechanism, including the spring, cam track and cam follower could be used to hold the arms in two different relative positions.
One possible alternative method of manufacture of the device, the subject of the present invention, is to form the cam follower arm integrally with the first portion. For example, the first portion, the cam follower arm and the cam follower could be formed in one piece from a plastics material, or any other mouldable material, by injection moulding or any other appropriate technique. In the same way, the cam follower retaining parts and the guide path or guide paths may be formed integrally with the second portion. When the first portion is fashioned in one piece, the design, and the choice of material used, must allow for movement of the free end of the cam follower arm in a plane parallel to the plane generally defined by the guide path or paths interconnecting the two cam follower retaining parts.
Where the guide path or paths are in the form of a groove or grooves in the base of which at least one step is provided, provision must be made in the design for sufficient rigidity of the cam follower arm in a direction at right angles to the plane generally defined by the base of the groove or grooves such that the resilience of the material used to manufacture the first portion provides the necessary bias to urge the cam follower, at the end of the cam follower arm, into co-operation with the base of the groove or grooves.
CLAIMS (filed on 26April 1982)
1. A mechanism for retaining first and second members, which move relative to each other, in a first and a second position, comprising
(a) a cam follower connectable to the first member,
(b) a cam track having first and second cam follower retaining parts and at least one guide path for the cam follower interconnecting the first and second retaining parts connectable to the second member, and
(c) biasing means for biasing the first and second members such that said cam follower is urged into
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
1. A mechanism for retaining first and second members, which move relative to each other, in a first and a second position, comprising
(a) a cam follower connectable to the first member,
(b) a cam track having first and second cam follower retaining parts and at least one guide path for the cam follower interconnecting the first and second retaining parts connectable to the second member, and
(c) biasing means for biasing the first and second members such that said cam follower is urged into
either one of the cam follower retaining parts, and wherein the or each guide path is constructed to guide the cam follower alternately from one cam follower retaining part to the other as the first and second members are moved relative to each other against the biasing means, in a reciprocating manner.
2. A reciprocatable device having two relatively slidable portions which can move between first and second positions, comprising
(a) a cam follower connected to a first portion,
(b) the second portion having first and second cam follower retaining parts and at least one guide path for the cam follower interconnecting the first and second retaining parts, and
(c) biasing means for biasing the first and second portions such that the cam follower is urged into either one of the cam follower retaining parts, and wherein the or each guide path is constructed to guide the cam follower alternately from one cam follower retaining part to the other as the first and second members are moved relative to each other against the biasing means in a reciprocating manner.
3. A device according to claim 2 wherein the cam follower is attached to or integral with a cam follower arm, the cam follower arm being attached to or integral with the first portion.
4. A device according to claim 2 or 3 wherein the or each guide path is a groove formed in the second portion.
5. A device according to claim 4 wherein at least one step is provided in the base of the or each groove such that the or each step co-operates with the cam follower to ensure that the cam follower moves alternatively from one of the cam follower retaining parts to the other as the first and second portions are moved relative to each other against the biasing means in a reciprocating manner.
6. A device according to claim 4 or 5 wherein the cam follower is biased against the base of each groove.
7. A device according to any one of claims 2-6 wherein the cam follower arm is pivotally attached to the first portion so that it can swing in one plane, the cam follower arm being formed of a resilient material such that it can flex in a plane at right angles to its swinging plane.
8. A device according to any one of claims 2-6 wherein the cam follower arm is integral with the first portion and formed of resiliently deformable material, such that the cam follower is biased into engagement with theguide path and first and second retaining parts in the second portion.
9. A device according to any preceding claim when used as a door handle.
10. A device substantially as hereinbefore described with reference to the accompanying drawings.
10. A device according to any of the preceding claims when used in an article for amusement.
11. A mechanism substantially as hereinbefore described with reference to the accompanying drawings.
12. A device substantially as hereinbefore described with reference to the accompanying drawings.
New claims or amendments to claims filed on 10.12.81
Superseded claims 1 to 12
New or amended claims:- 1 to 10
1. A mechanism for retaining first and second members, which are capable of movement relative to each other, in a first and a second position, comprising
(a) a cam follower connected to the first member,
(b) a cam track having first and second cam follower retaining parts and at least one groove formed in the second member interconnecting the first and second retaining parts, and
(c) biasing means for biasing the first and second members such that the said cam follower is urged into either one of the cam follower retaining parts, and wherein at least one step is provided in the base of the or each groove such that the or each step co-operates with the cam follower to ensure that the cam follower moves alternately from one of the cam follower retaining parts to the other as the first and second portions are moved relative to each other against the biasing means in a reciprocating manner.
2. A device having two relatively slidable portions which are capable of reciprocating motion and are retainable in a first and a second position, comprising
(a) a cam follower connected to a first portion,
(b) a cam track having first and second cam follower retaining parts and at least one groove formed in the second portion interconnecting the first and second retaining parts, and
(c) biasing means for biasing the first and second portions such that the said cam follower is urged into either one of the cam follower retaining parts, and wherein at least one step is provided in the base of the or each groove such that the or each step co-operates with the cam follower to ensure that the cam follower moves alternately from one of the cam follower retaining parts to the other as the first and second portions are moved relative to each other against the biasing means in a reciprocating manner.
3. A device according to claim 2 wherein the cam follower is attached to or integral with a cam follower arm, the cam follower arm being attached to or integral with the first portion.
4. A device according to claim 2 or 3 wherein the cam follower is biased against the base of each groove.
5. A device according to any one of claims 2-4 wherein the cam follower arm is pivotally attached to the first portion so that it can swing in one plane, the cam follower arm being formed of a resilient material such that it can flex in a plane at right angles to its swinging plane.
6. A device according to any one of claims 2-4 wherein the cam follower arm is integral with the first portion and formed of resiliently deformable material, such that the cam follower is biased into engagement with the groove and first and second retaining parts in the second portion.
7. A device according to any preceding claim when used as a door handle.
8. A device according to any of the preceding claims when used in an article for amusement.
9. A mechanism substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08208712A GB2117472A (en) | 1982-03-25 | 1982-03-25 | Mechanism for retaining two members in two different relative positions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08208712A GB2117472A (en) | 1982-03-25 | 1982-03-25 | Mechanism for retaining two members in two different relative positions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2117472A true GB2117472A (en) | 1983-10-12 |
Family
ID=10529257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08208712A Withdrawn GB2117472A (en) | 1982-03-25 | 1982-03-25 | Mechanism for retaining two members in two different relative positions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2117472A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2134961A (en) * | 1983-01-31 | 1984-08-22 | Issin Kenkyusho Kabushiki Kais | Door catches |
| GB2211540A (en) * | 1987-08-27 | 1989-07-05 | Hunter Douglas Ind Bv | Latch for blind |
| EP0535511A1 (en) * | 1991-10-04 | 1993-04-07 | Licentia Patent-Verwaltungs-GmbH | Vacuum cleaner with a fastening cover |
| US5619870A (en) * | 1993-04-29 | 1997-04-15 | Goldstar Co., Ltd. | Washing machine having punch-washing function |
| GB2352270A (en) * | 1999-07-02 | 2001-01-24 | Form & Plast As | A pressure-releasable snap-lock coupling |
| DE10118394A1 (en) * | 2001-04-12 | 2002-11-07 | Bulthaup Gmbh & Co Kg Kuechens | closure device |
| GB2397616A (en) * | 2003-01-22 | 2004-07-28 | Nifco Inc | Push-push lock mechanism |
| US6871909B2 (en) | 2000-04-28 | 2005-03-29 | Leggett & Platt Ltd | Locking mechanism for chair and pushbutton control therefor |
| WO2005054611A1 (en) * | 2003-12-08 | 2005-06-16 | Karl Simon Gmbh & Co. Kg | Pushing magnetic latch |
| EP1690473A2 (en) | 2005-02-14 | 2006-08-16 | Grass GmbH | Touch-latch system for furniture with relatively moving furniture parts to each other, in particular furniture drawers, furniture doors or furniture flaps |
| EP3366959A1 (en) * | 2017-02-23 | 2018-08-29 | Flühs Drehtechnik GmbH | Upper part of a valve |
| CN110259299A (en) * | 2019-06-17 | 2019-09-20 | 杨凯 | A kind of big pulling force pressing open and close device |
| US11479113B2 (en) * | 2018-12-18 | 2022-10-25 | Hyundai Motor Company | Fuel door opener assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB629367A (en) * | 1947-06-06 | 1949-09-19 | Geoffrey Ewart James | Improvements in or relating to gripping devices |
| GB1160821A (en) * | 1966-03-26 | 1969-08-06 | Barmag Barmer Maschf | A Textile Machine Comprising a Mechanism for Operating a Brake, Clutch or other Element Controlling the Rotation of a Driven Shaft |
| GB1163410A (en) * | 1967-08-08 | 1969-09-04 | Coastal Dynamics Corp | Latch Structure for Pull Lines |
| GB2022779A (en) * | 1978-05-31 | 1979-12-19 | Bodenseewerk Perkin Elmer Co | Fluid flow control valves |
| GB1563368A (en) * | 1976-10-08 | 1980-03-26 | Porsche Ag | Motor vehicle theft protection arrangement |
-
1982
- 1982-03-25 GB GB08208712A patent/GB2117472A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB629367A (en) * | 1947-06-06 | 1949-09-19 | Geoffrey Ewart James | Improvements in or relating to gripping devices |
| GB1160821A (en) * | 1966-03-26 | 1969-08-06 | Barmag Barmer Maschf | A Textile Machine Comprising a Mechanism for Operating a Brake, Clutch or other Element Controlling the Rotation of a Driven Shaft |
| GB1163410A (en) * | 1967-08-08 | 1969-09-04 | Coastal Dynamics Corp | Latch Structure for Pull Lines |
| GB1563368A (en) * | 1976-10-08 | 1980-03-26 | Porsche Ag | Motor vehicle theft protection arrangement |
| GB2022779A (en) * | 1978-05-31 | 1979-12-19 | Bodenseewerk Perkin Elmer Co | Fluid flow control valves |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2134961A (en) * | 1983-01-31 | 1984-08-22 | Issin Kenkyusho Kabushiki Kais | Door catches |
| GB2211540A (en) * | 1987-08-27 | 1989-07-05 | Hunter Douglas Ind Bv | Latch for blind |
| EP0535511A1 (en) * | 1991-10-04 | 1993-04-07 | Licentia Patent-Verwaltungs-GmbH | Vacuum cleaner with a fastening cover |
| US5619870A (en) * | 1993-04-29 | 1997-04-15 | Goldstar Co., Ltd. | Washing machine having punch-washing function |
| GB2352270A (en) * | 1999-07-02 | 2001-01-24 | Form & Plast As | A pressure-releasable snap-lock coupling |
| GB2352270B (en) * | 1999-07-02 | 2003-06-04 | Form & Plast As | A pressure releasable snap lock coupling |
| US6871909B2 (en) | 2000-04-28 | 2005-03-29 | Leggett & Platt Ltd | Locking mechanism for chair and pushbutton control therefor |
| DE10118394A1 (en) * | 2001-04-12 | 2002-11-07 | Bulthaup Gmbh & Co Kg Kuechens | closure device |
| GB2397616B (en) * | 2003-01-22 | 2005-12-21 | Nifco Inc | Lock mechanism and opening-closing device |
| GB2397616A (en) * | 2003-01-22 | 2004-07-28 | Nifco Inc | Push-push lock mechanism |
| US7017956B2 (en) | 2003-01-22 | 2006-03-28 | Nifco Inc. | Lock mechanism and opening-closing device |
| WO2005054611A1 (en) * | 2003-12-08 | 2005-06-16 | Karl Simon Gmbh & Co. Kg | Pushing magnetic latch |
| EP1690473A2 (en) | 2005-02-14 | 2006-08-16 | Grass GmbH | Touch-latch system for furniture with relatively moving furniture parts to each other, in particular furniture drawers, furniture doors or furniture flaps |
| WO2018153824A1 (en) * | 2017-02-23 | 2018-08-30 | Flühs Drehtechnik GmbH | Valve top |
| EP3366958A1 (en) * | 2017-02-23 | 2018-08-29 | Flühs Drehtechnik GmbH | Valve top |
| EP3366959A1 (en) * | 2017-02-23 | 2018-08-29 | Flühs Drehtechnik GmbH | Upper part of a valve |
| WO2018153655A1 (en) * | 2017-02-23 | 2018-08-30 | Flühs Drehtechnik GmbH | Valve top |
| CN110300866A (en) * | 2017-02-23 | 2019-10-01 | 弗吕斯旋转技术有限公司 | Valve top |
| CN110300866B (en) * | 2017-02-23 | 2021-12-21 | 弗吕斯旋转技术有限公司 | Valve top |
| US11479113B2 (en) * | 2018-12-18 | 2022-10-25 | Hyundai Motor Company | Fuel door opener assembly |
| CN110259299A (en) * | 2019-06-17 | 2019-09-20 | 杨凯 | A kind of big pulling force pressing open and close device |
| CN110259299B (en) * | 2019-06-17 | 2021-04-30 | 杨凯 | Large-pulling-force pressing opening and closing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |