CA1282577C - Cord clamp - Google Patents
Cord clampInfo
- Publication number
- CA1282577C CA1282577C CA000514089A CA514089A CA1282577C CA 1282577 C CA1282577 C CA 1282577C CA 000514089 A CA000514089 A CA 000514089A CA 514089 A CA514089 A CA 514089A CA 1282577 C CA1282577 C CA 1282577C
- Authority
- CA
- Canada
- Prior art keywords
- sleeve
- plunger
- cord
- windows
- shank
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B99/00—Subject matter not provided for in other groups of this subclass
-
- 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
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
- F16G11/10—Quick-acting fastenings; Clamps holding in one direction only
- F16G11/101—Quick-acting fastenings; Clamps holding in one direction only deforming the cable by moving a part of the fastener
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Buckles (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A cord clamp has a sleeve and a plunger displaceable in the sleeve against the force of a spring formed integrally on the plunger. The sleeve has a pair of windows which can be aligned in an opening in a shank of the plunger when the plunger is pressed in to allow the movement of the cord through the clamp. Inner corners of the bars in a zigzag pattern forming the spring are provided with circular section concavities to reduce material fatigue while opposite sides of the windows and of the opening are toothed for effective engagement with the cord and opposite ends of the sleeve and the plunger are convexly ribbed to allow convenient gripping and use of the clamp.
A cord clamp has a sleeve and a plunger displaceable in the sleeve against the force of a spring formed integrally on the plunger. The sleeve has a pair of windows which can be aligned in an opening in a shank of the plunger when the plunger is pressed in to allow the movement of the cord through the clamp. Inner corners of the bars in a zigzag pattern forming the spring are provided with circular section concavities to reduce material fatigue while opposite sides of the windows and of the opening are toothed for effective engagement with the cord and opposite ends of the sleeve and the plunger are convexly ribbed to allow convenient gripping and use of the clamp.
Description
~2~
A CORD CLAMP
SPECIFICATION
Field of the Invention The present invention relates to a cord clamp and, more particularly, to a device which is intended to be applied to a cord, string, band or strip for limiting the displacement thereof and which can be adjustably moved along the cord.
Backyround of the Invention It is known to provide on a drawstring or other cord, band or strip, an element which is adapted to form a stop preventing retraction of the cord through a hole, e.g. in a garment. Such cord clamps also serve to clamp two strands of a cord together or even a greater number of strands in relative posltions .
In general cord clamps have been provided in a large number of configurations and the cord clamp which is of the greatest interest for the purposes of this application comprises a sleeve into which a plunger can be forced against a spring counterforce, to align windows in the sleeve with an opening in the plunger or to cause registration thereof.
In this inwardly pressed position, a cord or a strand thereof can be displaced relative to the stop and, upon release of the pressure, which can be applied by the fingers of a hand of a user, the tendency for the opening to become disaligned from the windows results in a clamping action between an edge of the opening in the shank and an opposite edge of a window to grip the cord or strands between them. The cord can be threaded through a device when the windows and opening are aligned or in registry and simple release of the pressure fixes the cord relative to the stop.
Cord clamps or stops of this type can be utilized in sporting articles such as rucksacks and similar receptacles, bags and the like. They can be utilized in garments to draw in a ~Z~2~7~
portion o~ a garment which is to fit the wearer snugly but adjustably.
They have the advantage that they are more easily handled and even more versatile than buckles or the like and are characterized by the high degree of force which can be brought to bsar to prevent undesired shifting of the cord, clamp or stop on a cord.
Ob~ects of the Invention It is the principal object of the present invention to provide an easily operated cord clamp of the type described ~7hich is more reliable than earlier devices for this purpose, is inexpensive to manufacture and especially has a longer useful life.
Another object of the invention is to provide a cord stop which has less of a tendency to breakage or permanent deformation tending to impair its operation than earlier devices which have been proposed for the purpose.
Summary of the Invention These objects and others which will become apparent hereinafter are attained, in accordance with the invention, in a cord clamp or stop which comprises a flattened sleeve open at one end and closed at an opposite end, and a plunger received in this sleeve and having a head projecting from the open end, the plunger being integral with a spring and having an opening in its shank which can be aligned with windows in opposite sides or walls of the sleeve to release a cord threaded through the windows of the opening when the plunger is pressed into the sleeve, the spring serving to bias the windows and opening out of alignment for the clamping action previously described.
In order to increase the life of the device, the spring, which is formed from unitarily interconnected bars ajoining each other at angles in a zigzag configuration for internal corners which, according to the invention, are provided with rounded concavities facilitating bending of the spring adjacent the conravities. Most advantageously these concavities are of ~ ~2~7~
circular cross section.
According to another feature of the invention, external surfaces of the head and the closed end of the sleeve are provided with outwardly convexly curved and ribbed surfaces which facilitate greatly the gripping of the device between fingers of the hand of a user, e.g. between the thumb and an index finger.
Furthermore, the edges of the opening in thP shank and the windows which grip the cord under the spring force in accordance with the invention are preferably toothed.
The rounded concavities at the inner corners of the junctions formed by the bars of the spring have been found to eliminate material fatigue of the spring or to greatly reduce that fatigue.
Brief Description of the Drawin~
The above and other objects, features and advantages of the present invention will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
FIG. 1 is an elevational view of the cord clamp of the invention with the plunger in its outwardmost position in which it is held by its spring;
FIG. 2 is an elevational view of the plunger removed from the sleeve;
FIG. 3 is an elevational view of the sleeve with the plunger removed therefrom;
FIG. 4 is a sectional view through the sleeve showing the plunger fully depressed so that its opening and the windows of the sleeve can be aligned;
FIG. 5 is a side-elevational view of the device showing it clamped to a cord; and FIG. 6 is a detail-elevational view drawn to a much larger scale and showing the inner corner between two bars of the zlgzag spring.
~25~7 Specific Description As can be seen from FIGS. 1-3, the principal elements of the cord clamp of the invention are a plunger 10 and a sleeve 20.
The plunger 10 comprises a head 11 which has an outwardly curved and transversely ribbed surface 12 molded unitarily with a shank 13 which, in turn, is formed unitarily rrith a zig2ag spring 14 whose bars 15 join at angular junctions 16 (FIG. 6), the internal corners of which are provided with circular concavities 17.
The flattened end 18 of the spring can come to rest upon a surfase 21 of the sleeve 20 provided within the latter.
The shank 13 has a throughgoing window 13a which is elongated in a direction transverse to the direction in which the plunger is pressed into the sleeve (arrows P in FIG. 4) so as to have longer sides 13b and 13c, the latter being toothed. Adjacent the long sides 13c, moreover, a lug 13d projects from the shank and engages in one of the windows of the sleeve to prevent withdrawal of the plunger from the sleeve.
The sleeve 20 has an open end 22 and a closed end 23, the latter being convexly curved and ribbed opposite the ribbed surface 12 of the head, to permit the device to be readily gripped between, say, the thumb and the index finger of a hand of the user.
The sleeve 20, moreover, is formed with two elongated windows 24 which have long sides 24a and 24b, the former of which is toothed so that when a cord C is clamped within the windows of the opening of the plunger, the toothed edges 13c and 24a bear in opposite directions against the cord. The lug 13_ engages the upper edge 24 of one of the windows to prevent withdrawal of the plunger beyond the position shown in FIG. 1.
When the plunger is fully depressed by the application of pressure as represented by the arrows P in FIG. 4, the lug 13d can engage in a recess 24c in the long side 24b of a window 24.
The windows are thus aligned with the opening in the shank and the cord C can be drawn through them to the desired position. Release of the plunger then locks the cord in place.
~x~
The toothed formations along the opposite edges of the windows in the sleeve and the opening in the plunger, in combination with the effect of the spring, ensures a fixing of the device to the cord and, where several strands of a cord traverse the openin~ of these windows, the strands relative to one another even when considerable force is applied, e.g. in the form of tension to the strand against the clamp.
The outwardly convex or domed configuration of the ribbed ends of the plunger and sleeve facilitates manipulation lo and, of course, the circular concavities at the inner corners of the pairs of the spring counter material fatigue.
A CORD CLAMP
SPECIFICATION
Field of the Invention The present invention relates to a cord clamp and, more particularly, to a device which is intended to be applied to a cord, string, band or strip for limiting the displacement thereof and which can be adjustably moved along the cord.
Backyround of the Invention It is known to provide on a drawstring or other cord, band or strip, an element which is adapted to form a stop preventing retraction of the cord through a hole, e.g. in a garment. Such cord clamps also serve to clamp two strands of a cord together or even a greater number of strands in relative posltions .
In general cord clamps have been provided in a large number of configurations and the cord clamp which is of the greatest interest for the purposes of this application comprises a sleeve into which a plunger can be forced against a spring counterforce, to align windows in the sleeve with an opening in the plunger or to cause registration thereof.
In this inwardly pressed position, a cord or a strand thereof can be displaced relative to the stop and, upon release of the pressure, which can be applied by the fingers of a hand of a user, the tendency for the opening to become disaligned from the windows results in a clamping action between an edge of the opening in the shank and an opposite edge of a window to grip the cord or strands between them. The cord can be threaded through a device when the windows and opening are aligned or in registry and simple release of the pressure fixes the cord relative to the stop.
Cord clamps or stops of this type can be utilized in sporting articles such as rucksacks and similar receptacles, bags and the like. They can be utilized in garments to draw in a ~Z~2~7~
portion o~ a garment which is to fit the wearer snugly but adjustably.
They have the advantage that they are more easily handled and even more versatile than buckles or the like and are characterized by the high degree of force which can be brought to bsar to prevent undesired shifting of the cord, clamp or stop on a cord.
Ob~ects of the Invention It is the principal object of the present invention to provide an easily operated cord clamp of the type described ~7hich is more reliable than earlier devices for this purpose, is inexpensive to manufacture and especially has a longer useful life.
Another object of the invention is to provide a cord stop which has less of a tendency to breakage or permanent deformation tending to impair its operation than earlier devices which have been proposed for the purpose.
Summary of the Invention These objects and others which will become apparent hereinafter are attained, in accordance with the invention, in a cord clamp or stop which comprises a flattened sleeve open at one end and closed at an opposite end, and a plunger received in this sleeve and having a head projecting from the open end, the plunger being integral with a spring and having an opening in its shank which can be aligned with windows in opposite sides or walls of the sleeve to release a cord threaded through the windows of the opening when the plunger is pressed into the sleeve, the spring serving to bias the windows and opening out of alignment for the clamping action previously described.
In order to increase the life of the device, the spring, which is formed from unitarily interconnected bars ajoining each other at angles in a zigzag configuration for internal corners which, according to the invention, are provided with rounded concavities facilitating bending of the spring adjacent the conravities. Most advantageously these concavities are of ~ ~2~7~
circular cross section.
According to another feature of the invention, external surfaces of the head and the closed end of the sleeve are provided with outwardly convexly curved and ribbed surfaces which facilitate greatly the gripping of the device between fingers of the hand of a user, e.g. between the thumb and an index finger.
Furthermore, the edges of the opening in thP shank and the windows which grip the cord under the spring force in accordance with the invention are preferably toothed.
The rounded concavities at the inner corners of the junctions formed by the bars of the spring have been found to eliminate material fatigue of the spring or to greatly reduce that fatigue.
Brief Description of the Drawin~
The above and other objects, features and advantages of the present invention will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
FIG. 1 is an elevational view of the cord clamp of the invention with the plunger in its outwardmost position in which it is held by its spring;
FIG. 2 is an elevational view of the plunger removed from the sleeve;
FIG. 3 is an elevational view of the sleeve with the plunger removed therefrom;
FIG. 4 is a sectional view through the sleeve showing the plunger fully depressed so that its opening and the windows of the sleeve can be aligned;
FIG. 5 is a side-elevational view of the device showing it clamped to a cord; and FIG. 6 is a detail-elevational view drawn to a much larger scale and showing the inner corner between two bars of the zlgzag spring.
~25~7 Specific Description As can be seen from FIGS. 1-3, the principal elements of the cord clamp of the invention are a plunger 10 and a sleeve 20.
The plunger 10 comprises a head 11 which has an outwardly curved and transversely ribbed surface 12 molded unitarily with a shank 13 which, in turn, is formed unitarily rrith a zig2ag spring 14 whose bars 15 join at angular junctions 16 (FIG. 6), the internal corners of which are provided with circular concavities 17.
The flattened end 18 of the spring can come to rest upon a surfase 21 of the sleeve 20 provided within the latter.
The shank 13 has a throughgoing window 13a which is elongated in a direction transverse to the direction in which the plunger is pressed into the sleeve (arrows P in FIG. 4) so as to have longer sides 13b and 13c, the latter being toothed. Adjacent the long sides 13c, moreover, a lug 13d projects from the shank and engages in one of the windows of the sleeve to prevent withdrawal of the plunger from the sleeve.
The sleeve 20 has an open end 22 and a closed end 23, the latter being convexly curved and ribbed opposite the ribbed surface 12 of the head, to permit the device to be readily gripped between, say, the thumb and the index finger of a hand of the user.
The sleeve 20, moreover, is formed with two elongated windows 24 which have long sides 24a and 24b, the former of which is toothed so that when a cord C is clamped within the windows of the opening of the plunger, the toothed edges 13c and 24a bear in opposite directions against the cord. The lug 13_ engages the upper edge 24 of one of the windows to prevent withdrawal of the plunger beyond the position shown in FIG. 1.
When the plunger is fully depressed by the application of pressure as represented by the arrows P in FIG. 4, the lug 13d can engage in a recess 24c in the long side 24b of a window 24.
The windows are thus aligned with the opening in the shank and the cord C can be drawn through them to the desired position. Release of the plunger then locks the cord in place.
~x~
The toothed formations along the opposite edges of the windows in the sleeve and the opening in the plunger, in combination with the effect of the spring, ensures a fixing of the device to the cord and, where several strands of a cord traverse the openin~ of these windows, the strands relative to one another even when considerable force is applied, e.g. in the form of tension to the strand against the clamp.
The outwardly convex or domed configuration of the ribbed ends of the plunger and sleeve facilitates manipulation lo and, of course, the circular concavities at the inner corners of the pairs of the spring counter material fatigue.
Claims (7)
1. A cord clamp comprising:
a sleeve open at one end, closed at an opposite end, and respective mutually aligned windows formed proximal to said one end in opposite walls of said sleeve through which a cord can be passed; and a plunger received in said sleeve and formed with:
a head disposed outside said sleeve and adapted to be pressed toward said sleeve, a shank adjacent said head and formed with a transverse hole registrable with said windows upon pressing of said head toward said sleeve and said shank into said sleeve, and a spring having interconnected bars in a zigzag configuration integral with said shank and bearing upon a surface of said sleeve within said sleeve and including internal corners between them, said internal corners being formed with rounded concavities facilitating bending of said spring adjacent said concavities, external surfaces of said head and said closed end of said sleeve being outwardly convexly curved and ribbed, and edges of said windows and said opening engageable with said cord being toothed.
a sleeve open at one end, closed at an opposite end, and respective mutually aligned windows formed proximal to said one end in opposite walls of said sleeve through which a cord can be passed; and a plunger received in said sleeve and formed with:
a head disposed outside said sleeve and adapted to be pressed toward said sleeve, a shank adjacent said head and formed with a transverse hole registrable with said windows upon pressing of said head toward said sleeve and said shank into said sleeve, and a spring having interconnected bars in a zigzag configuration integral with said shank and bearing upon a surface of said sleeve within said sleeve and including internal corners between them, said internal corners being formed with rounded concavities facilitating bending of said spring adjacent said concavities, external surfaces of said head and said closed end of said sleeve being outwardly convexly curved and ribbed, and edges of said windows and said opening engageable with said cord being toothed.
2. The cord clamp defined in claim 1 wherein said sleeve and said plunger are each unitarily molded from a synthetic resin.
3. The cord clamp defined in claim 2 wherein said hole is elongated in a direction transverse to the direction in which said plunger is pressed into said sleeve, said hole having opposite long edges, one of said edges being toothed.
4. The cord clamp defined in claim 3 wherein said windows are each elongated in said direction transverse to the direction in which said plunger is pressed into said sleeve, said windows each having opposite long sides, one of said sides of each window being toothed.
5. The cord clamp defined in claim 4 wherein the toothed sides of said windows are opposite the toothed edge of said hole.
6. The cord clamp defined in claim 5, further comprising at least one lug molded onto said shank and engaging in one of said windows for preventing separation of said plunger from said sleeve.
7. The cord clamp defined in claim 6 wherein said sleeve and said shank are of flattened cross section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8521534U DE8521534U1 (en) | 1985-07-26 | 1985-07-26 | Cord stopper |
| DEG8521534.1 | 1985-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1282577C true CA1282577C (en) | 1991-04-09 |
Family
ID=6783541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000514089A Expired - Lifetime CA1282577C (en) | 1985-07-26 | 1986-07-17 | Cord clamp |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1282577C (en) |
| DE (1) | DE8521534U1 (en) |
| GB (1) | GB2178790B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493708A (en) * | 2011-12-27 | 2012-06-13 | 南京际华三五二一特种装备有限公司 | Automatic tightening device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63272302A (en) * | 1987-04-30 | 1988-11-09 | モリト株式会社 | String regulating and fixing jig and production thereof |
| JPH0540731Y2 (en) * | 1987-05-01 | 1993-10-15 | ||
| JPH0580311U (en) * | 1992-02-12 | 1993-11-02 | 吉田工業株式会社 | String stopper |
| JP3262455B2 (en) * | 1994-05-27 | 2002-03-04 | 株式会社ニフコ | Tethers |
| JPH07313217A (en) * | 1994-05-27 | 1995-12-05 | Nifco Inc | Cord stopper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE443909B (en) * | 1982-12-16 | 1986-03-17 | Fixfabriken Ab | cord lock |
-
1985
- 1985-07-26 DE DE8521534U patent/DE8521534U1/en not_active Expired
-
1986
- 1986-07-16 GB GB08617340A patent/GB2178790B/en not_active Expired
- 1986-07-17 CA CA000514089A patent/CA1282577C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493708A (en) * | 2011-12-27 | 2012-06-13 | 南京际华三五二一特种装备有限公司 | Automatic tightening device |
| CN102493708B (en) * | 2011-12-27 | 2013-11-06 | 南京际华三五二一特种装备有限公司 | Automatic tightening device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8617340D0 (en) | 1986-08-20 |
| GB2178790B (en) | 1988-07-20 |
| GB2178790A (en) | 1987-02-18 |
| DE8521534U1 (en) | 1985-11-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |