CA1303309C - Joint connection between two plastic parts - Google Patents
Joint connection between two plastic partsInfo
- Publication number
- CA1303309C CA1303309C CA000573444A CA573444A CA1303309C CA 1303309 C CA1303309 C CA 1303309C CA 000573444 A CA000573444 A CA 000573444A CA 573444 A CA573444 A CA 573444A CA 1303309 C CA1303309 C CA 1303309C
- Authority
- CA
- Canada
- Prior art keywords
- outer element
- joint connection
- inner element
- component
- connection
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0017—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor moulding interconnected elements which are movable with respect to one another, e.g. chains or hinges
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D9/00—Flaps or sleeves specially designed for making from particular material, e.g. hoop-iron, sheet metal, plastics
- E05D9/005—Flaps or sleeves specially designed for making from particular material, e.g. hoop-iron, sheet metal, plastics from plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/006—Joining parts moulded in separate cavities
- B29C2045/0065—Joining parts moulded in separate cavities the parts being interconnected before assembling by a breaking or shearing point
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Pivots And Pivotal Connections (AREA)
- Toys (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Eyeglasses (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
JOINT CONNECTION BETWEEN TWO PLASTIC PARTS
Abstract The invention relates to a joint connection 3 between two plastic parts 1 and 2, one part being at least partly rotatable in relation to the other part. According to the invention, the joint connection 3 consists of a shell-form outer element 4 on the one plastic part 1 and an inner element 5, at least partly supported in the outer element 4, on the other plastic part 2, both elements 4 and 5 being made by being injection molded one in the other, from one tool.
Abstract The invention relates to a joint connection 3 between two plastic parts 1 and 2, one part being at least partly rotatable in relation to the other part. According to the invention, the joint connection 3 consists of a shell-form outer element 4 on the one plastic part 1 and an inner element 5, at least partly supported in the outer element 4, on the other plastic part 2, both elements 4 and 5 being made by being injection molded one in the other, from one tool.
Description
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JOINT CONNECTION BETWEEN TWO PLASTIC PARTS
Backqround of the Invention The inv~ntion relates to a joint connection between two plastic parts, wherein one part is at least partly rotatable in relation to the other part.
As state of the art, such a construction is already known. For example, West German Printed ~isclosure 3,014,578 shows a structure in which the two plastic parts, one of which is designed as a bearing part and the other as clamping jaw halves, are joined together through a joint connection in the form of a short one-piece short hinge strip. A disadvantags in this prior art construction, which uses a hinge strip as the joint connectioll, is the danger of breaking the hinge. In case of hard materials this danger is considerable when bending through the required bending range of about 90. There is also the disadvantage of having a dependence on material of the film hinge. That is, the whole construction must be adapted to the shape of the hinge to achieve the desired elasticity.
In a so-càlled two-component injection molding process, there is a further disadvantage that a material must be used which is adapted to the shape of the hinge part.
As an alternative to this known state of the art, it is generally been known to produce two plastic parts singly and then assemble them together. In which case, however, high production and single parts costs result. For this type of construction, two dies are needed for the production of the corresponding parts, as well as different bearing holding devices. Additionally, the two parts must be assembled together in order to have a unit ready for use.
The present invention attacks the problem vf designing a construction of the kind mentioned so that without regard to the material~ an improvement of the hinging between two plastic parts can be provided with ~3Q33~
JOINT CONNECTION BETWEEN TWO PLASTIC PARTS
Backqround of the Invention The inv~ntion relates to a joint connection between two plastic parts, wherein one part is at least partly rotatable in relation to the other part.
As state of the art, such a construction is already known. For example, West German Printed ~isclosure 3,014,578 shows a structure in which the two plastic parts, one of which is designed as a bearing part and the other as clamping jaw halves, are joined together through a joint connection in the form of a short one-piece short hinge strip. A disadvantags in this prior art construction, which uses a hinge strip as the joint connectioll, is the danger of breaking the hinge. In case of hard materials this danger is considerable when bending through the required bending range of about 90. There is also the disadvantage of having a dependence on material of the film hinge. That is, the whole construction must be adapted to the shape of the hinge to achieve the desired elasticity.
In a so-càlled two-component injection molding process, there is a further disadvantage that a material must be used which is adapted to the shape of the hinge part.
As an alternative to this known state of the art, it is generally been known to produce two plastic parts singly and then assemble them together. In which case, however, high production and single parts costs result. For this type of construction, two dies are needed for the production of the corresponding parts, as well as different bearing holding devices. Additionally, the two parts must be assembled together in order to have a unit ready for use.
The present invention attacks the problem vf designing a construction of the kind mentioned so that without regard to the material~ an improvement of the hinging between two plastic parts can be provided with ~3Q33~
simpler and less expensive production.
This problem is solved, according to the invention, by the fact that the joint connection consists oE a shell-form outer element on the one plastic part and an inner element, at least partly supported in the outer element, on the other plastic part.
Further, the two elements are made by injection molding one inside the other, in a single die. In this way, the advantage is given of a simple and cost-saving production, as a result of the use of a single die in the joint zone. The two plastic parts are, however, joined to~ether movably through the joint zone. Since between the two plastic parts there is no connection in the Eorm of a hinge, there is, advantageously, no longer any danger of breaking at the turning point. Moreover, for the joint connection according to the invention, there is no dependence on specific material characteristics or properties. The joint connection is ideally suited to hard materials. Furthermore, through the joint connection of the invention with the loose connection between the one and the other plastic part, a rotation range of up to 360 can be reachedO
According to a first broad aspect of the present invention, there is provided a plastics component comprising two members articulated together by a connection such that they are at least partially relatively rotatable, the connection having an outer element which is ~ormed on one of the members and an inner element which is formed on the other member and which is at least partially located within the outer element, both elements being moulded in the same mould, the inner element being moulded within the outer element in the said mould, wherein said connection .
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This problem is solved, according to the invention, by the fact that the joint connection consists oE a shell-form outer element on the one plastic part and an inner element, at least partly supported in the outer element, on the other plastic part.
Further, the two elements are made by injection molding one inside the other, in a single die. In this way, the advantage is given of a simple and cost-saving production, as a result of the use of a single die in the joint zone. The two plastic parts are, however, joined to~ether movably through the joint zone. Since between the two plastic parts there is no connection in the Eorm of a hinge, there is, advantageously, no longer any danger of breaking at the turning point. Moreover, for the joint connection according to the invention, there is no dependence on specific material characteristics or properties. The joint connection is ideally suited to hard materials. Furthermore, through the joint connection of the invention with the loose connection between the one and the other plastic part, a rotation range of up to 360 can be reachedO
According to a first broad aspect of the present invention, there is provided a plastics component comprising two members articulated together by a connection such that they are at least partially relatively rotatable, the connection having an outer element which is ~ormed on one of the members and an inner element which is formed on the other member and which is at least partially located within the outer element, both elements being moulded in the same mould, the inner element being moulded within the outer element in the said mould, wherein said connection .
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comprises two portions extending substantlally along the axis of relative rotation of the two members, the element cross sections of one portion corresponding to that of the other portion when rotated through 180 relative thereto, but not otherwise.
According to a second aspect of the present invention, there is provided a joint connection between two plastic parts, one part being at least partially rotatable in relation to the other part, characterizlng that the joint connection consists of a shell-form outer element on the one plastic part, and inner element at least partially supported in the outer element on the other plastic part, wherein both elements are made by being injection moulded one inside the other from one tool, and wherein the outer and inner elements have, in each case, two axial receiving zones angularly displaced by 180.
With reference to preferred embodiments, the inner element of the plastic component is substantially pin-shaped and in each of the portions of the connec-tion comprises a respective pair of radially opposed flat and curved surfaces oriented in the axial direction. Respective pairs of flat and curved surEaces of the outer element correspond to and radially oppose the pairs of flat and curved surfaces of the inner element.
The pairs of surfaces of the inner element preferably extend towards the axial middle of the inner element, and a connecting member is arranged between the axially adjacen-t pairs of surfaces of the inner element. Furthermore, the outer element preferably comprises radial openings in the region of the connecting member.
With reference to further preferred embodiments, each of .
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According to a second aspect of the present invention, there is provided a joint connection between two plastic parts, one part being at least partially rotatable in relation to the other part, characterizlng that the joint connection consists of a shell-form outer element on the one plastic part, and inner element at least partially supported in the outer element on the other plastic part, wherein both elements are made by being injection moulded one inside the other from one tool, and wherein the outer and inner elements have, in each case, two axial receiving zones angularly displaced by 180.
With reference to preferred embodiments, the inner element of the plastic component is substantially pin-shaped and in each of the portions of the connec-tion comprises a respective pair of radially opposed flat and curved surfaces oriented in the axial direction. Respective pairs of flat and curved surEaces of the outer element correspond to and radially oppose the pairs of flat and curved surfaces of the inner element.
The pairs of surfaces of the inner element preferably extend towards the axial middle of the inner element, and a connecting member is arranged between the axially adjacen-t pairs of surfaces of the inner element. Furthermore, the outer element preferably comprises radial openings in the region of the connecting member.
With reference to further preferred embodiments, each of .
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the said por-tions of the outer element has an inner surface configuration comprising a planar and a curved surface and the inner element has an outer surface configuration comprising a curved and planar surface. Preferably, the said portions extend to each other from respective opposed ends oE the connection.
The inner and outer elements of the component according to the present invention may also define a cavity between the said portions thereof preferably, this cavity is bounded by: (i) on the outer element, respective opposed plane surfaces disposed between the curved surface of the outer element in each said portion and the planar surface thereof in the other said portion, and respective further surfaces extending inwardly from said plane surfaces to said planar surfaces; and (ii) on the inner element, surfaces disposed oppositely to said further surfaces on the outer element, and surfaces of a web interconnecting the parts of the inner element in the portions of the connection.
Since for the joint connection according to the inven-tion, there is no dependence on material, the best ma-terials can be used in each case, especially in a two-component inject:ion molding process, which make possible a good adhesion between the first and the second components.
If the joint connection according to the invention is to absorb greater forces, this can be achieved at any time by increasing the thickness dimensions of the inner and outer elements.
The invention will be explained in detail below with reference to pre-ferred embodiments illustrated in the drawings wherein:
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4a 27869-2 Figure 1 shows a side view of a :Eirst embodiment of joint connection formed in accordance with the lnvention;
Figure 2 shows the joint connection according to Figure 1, in frontal view, partly broken away;
Figure 3 is a side view of a second embodiment of joint connection of the invention;
Figure 4 shows a vertical radial section through the joint connection according to Figure 3;
Figure 5 shows in side view possible embodiment of joint connection according to the invention;
Figure 6 shows a vertical radial section through the joint connection according to Figure 5;
Figure 7 shows a frontal view of one form of the joint connection according to the invention used in a fastening element;
Figure 8 shows in front elevational view another possible embodiment of the joint connection according to the invention; and, Figure 9 shows a top view partly broken away of the join-t connection according to Figure 8.
Referring more particularly to the drawings wherein the showings are for the purpose of illustrating preferred embodiments of the inven-tion only, and not for the purpose of limiting same, Figure 1 shows, in somewhat diagram form, a plastic part 1, which is connected through a joint connection 3 with a second plastic part 2. Here, the joint connection 3 is comprised of a shell-form, outer element 4 on the one plastic part 1. An inner element 5 is formed on the other plastic part 2. Inner element 5 is ~3~33~
4b 27869-2 somewhat cylindrical and is at least partly supported in the outer element 4. Both elements 4 and S are made by being injected one inside the other ~rom one tool.
As can be seen, the outer element 4 has an at least partly circular circumferential open zone. In the open zone is supported the inner element 5. PreEerably the element 5 is designed in a generally peg or axle form and is spaced from outer element 4 over an interspace or gap 7~ Between the two elements 4 and 5 is -formed a breakable spacer piece 6. Piece 6 is designed to be broken with the action of the joint connection, so that then the peg-form inner element 5 can move, joint-like, in the shell-like outer element 4. For a better adapting of the rotational properties, there may be provided an opening 8 or circular slot in the outer element 4. The opening or slot 8 is preerably equidistant from the circular circumferential zone or interspace 7 in surrounding relationship thereto. The inner element 5, designed in peg form, is connected with the plastic part 2 through a stay or connecting web 25. With this design, the swinging allowed the joint connection according to the invention depends on the thickness of the stay 25 and the size of the opening of the outer element 4 in the zone about the stay 25.
In the embodiment according to Figs. 3 and 4, the outer element 4' and the inner element 5' have, in each case, two axle receiving zones I and II which are side-by-side but rotated by 180. Here, the particular zone of the outer element 4' is hounded by a flat end surEace 9 and an arched end surface 10.
From Fig. 4 it can be seen that in zone I, the flat end surface 9 lies above, and in zone II, the flat end surface 9 lies ~` ~3~33al~
4c 27869-2 be]ow. The arched surfaces 10 in zones I and II lie correspondingly diagonal.
The particular zone of the inner element S is here designed as a peg, with an arched surface 11 and a Elat surface 12. Thus, each axle receiving zone of the inner element 5 approximates a segment of a circle bounded by an arc and a chord.
As can be seen further from Fig. 4, in the zone I the flat surface 12 is above, and thus lies opposite the flat end surface 9 of the outer element 4'. The arrangemen-t in zone II corresponds. In this way th~ere is given a greater degree of freedom of the joint connection according to the invention, because of the interspaces between the surfaces 10 and 11 and the surfaces 9 and 12.
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In the embodiment according to Fig. 5, the inner element and the outer element each have an opening 13, 14 respectively located in the middle between the two zones I
and II. As seen in Figure 6, the openings 13 and 14 are formed by a flat surface 15, lying at a distance from the particular arched end surface 10, and by surfaces 16 and 17. Surface 16 is arrangsd perpendicular to end surface 10, in the outer element. Vertical surface 17 is located, at a distance from the surface 16 of the outer element, and is perpendicular to a connection part 18 between the two zones of the inner part 5'. As can be seen, the opening 13 or 14 is bounded by the surfaces 15 and 16 in the middle zone of the outer element 4'~ and by the surface 17 and the intermediate part 18 of the inner element 5'.
The embodiment shown in Figures 5 and 6, is an extension or modification of the construction according to Figs. 3 and 4, and provides a further degree of freedom for the joint cvnnection according to the invention.
Specifically, the plastic part 2 can also be moved in the axial direction in relation to the plastic part 1. The distance of axial movement permitted corresponds, of course, to the width of the opening 13 or 14.
Figure 7 illustrates the use of the joint connection as shown in Figures 3 and 4. Here a fastening element 19 is chosen as starting point. Element 19 has two shell-like elements 20 and 21. Element 21 carries the inner element 5' in a manner similar to the plastic part 2 represented in Figs. 1 to 6. The outer zone, that is, the outer element 4', is arranged in the bearing part of the fastening element 19, similar to the plastic part 1 in the embodiments according to Figures 1 to 6.
The outer element 4', as well as well as the inner element 5', is shaped similar to the construction shown in Figs. 3 and 4; that is, with arched and flat surfaces. As can be seen, by this construction the shell element 21 can `- ~3gJ ~3~
cover a great swinging range, and is thus more elastic in its mobility than the shell element 20 fastened to the corresponding bearing part through a prior art film hinge.
However, there is also the possibility to arran~e the shell element 20, similar to the joint connection o~ the shell element 2l, on the corresponding bearing part.
In Figs. 8 and 9 is shown another possible embodiment of joint connection according to the invention.
As can be seen, in this embodiment the outer element 4" has a smooth, closed circumferential zone which is formed by a ring 22. The inner element 5' is designed in peg form and is supported in the ring 22 through the peg 23. Here, in the drawing according to Figure 8, there is a significant interspace between the peg 23 and the ring 22, but according to the shape o~ construction this space may be designed smaller. ~he outer element 4" is arranged in the plastic part l through a stay 24; the inner element 511 i5 fastened, in turn, through a stay 25 to the plasti.c part 2.
All the above-mentioned joint connections accordiny to the invention are produced by being iniected one in the other, in the joint zone, from a single tool, while the two plastic parts l and 2 are connected movable relation to each other, in the corresponding joint zone ~. As a result of this joint connection, there is no danger of breakage at the point of rotationO While for the shaping of the joint connection according to the invention, as a ~urther advantage, there is no dependence on material.
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The inner and outer elements of the component according to the present invention may also define a cavity between the said portions thereof preferably, this cavity is bounded by: (i) on the outer element, respective opposed plane surfaces disposed between the curved surface of the outer element in each said portion and the planar surface thereof in the other said portion, and respective further surfaces extending inwardly from said plane surfaces to said planar surfaces; and (ii) on the inner element, surfaces disposed oppositely to said further surfaces on the outer element, and surfaces of a web interconnecting the parts of the inner element in the portions of the connection.
Since for the joint connection according to the inven-tion, there is no dependence on material, the best ma-terials can be used in each case, especially in a two-component inject:ion molding process, which make possible a good adhesion between the first and the second components.
If the joint connection according to the invention is to absorb greater forces, this can be achieved at any time by increasing the thickness dimensions of the inner and outer elements.
The invention will be explained in detail below with reference to pre-ferred embodiments illustrated in the drawings wherein:
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4a 27869-2 Figure 1 shows a side view of a :Eirst embodiment of joint connection formed in accordance with the lnvention;
Figure 2 shows the joint connection according to Figure 1, in frontal view, partly broken away;
Figure 3 is a side view of a second embodiment of joint connection of the invention;
Figure 4 shows a vertical radial section through the joint connection according to Figure 3;
Figure 5 shows in side view possible embodiment of joint connection according to the invention;
Figure 6 shows a vertical radial section through the joint connection according to Figure 5;
Figure 7 shows a frontal view of one form of the joint connection according to the invention used in a fastening element;
Figure 8 shows in front elevational view another possible embodiment of the joint connection according to the invention; and, Figure 9 shows a top view partly broken away of the join-t connection according to Figure 8.
Referring more particularly to the drawings wherein the showings are for the purpose of illustrating preferred embodiments of the inven-tion only, and not for the purpose of limiting same, Figure 1 shows, in somewhat diagram form, a plastic part 1, which is connected through a joint connection 3 with a second plastic part 2. Here, the joint connection 3 is comprised of a shell-form, outer element 4 on the one plastic part 1. An inner element 5 is formed on the other plastic part 2. Inner element 5 is ~3~33~
4b 27869-2 somewhat cylindrical and is at least partly supported in the outer element 4. Both elements 4 and S are made by being injected one inside the other ~rom one tool.
As can be seen, the outer element 4 has an at least partly circular circumferential open zone. In the open zone is supported the inner element 5. PreEerably the element 5 is designed in a generally peg or axle form and is spaced from outer element 4 over an interspace or gap 7~ Between the two elements 4 and 5 is -formed a breakable spacer piece 6. Piece 6 is designed to be broken with the action of the joint connection, so that then the peg-form inner element 5 can move, joint-like, in the shell-like outer element 4. For a better adapting of the rotational properties, there may be provided an opening 8 or circular slot in the outer element 4. The opening or slot 8 is preerably equidistant from the circular circumferential zone or interspace 7 in surrounding relationship thereto. The inner element 5, designed in peg form, is connected with the plastic part 2 through a stay or connecting web 25. With this design, the swinging allowed the joint connection according to the invention depends on the thickness of the stay 25 and the size of the opening of the outer element 4 in the zone about the stay 25.
In the embodiment according to Figs. 3 and 4, the outer element 4' and the inner element 5' have, in each case, two axle receiving zones I and II which are side-by-side but rotated by 180. Here, the particular zone of the outer element 4' is hounded by a flat end surEace 9 and an arched end surface 10.
From Fig. 4 it can be seen that in zone I, the flat end surface 9 lies above, and in zone II, the flat end surface 9 lies ~` ~3~33al~
4c 27869-2 be]ow. The arched surfaces 10 in zones I and II lie correspondingly diagonal.
The particular zone of the inner element S is here designed as a peg, with an arched surface 11 and a Elat surface 12. Thus, each axle receiving zone of the inner element 5 approximates a segment of a circle bounded by an arc and a chord.
As can be seen further from Fig. 4, in the zone I the flat surface 12 is above, and thus lies opposite the flat end surface 9 of the outer element 4'. The arrangemen-t in zone II corresponds. In this way th~ere is given a greater degree of freedom of the joint connection according to the invention, because of the interspaces between the surfaces 10 and 11 and the surfaces 9 and 12.
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In the embodiment according to Fig. 5, the inner element and the outer element each have an opening 13, 14 respectively located in the middle between the two zones I
and II. As seen in Figure 6, the openings 13 and 14 are formed by a flat surface 15, lying at a distance from the particular arched end surface 10, and by surfaces 16 and 17. Surface 16 is arrangsd perpendicular to end surface 10, in the outer element. Vertical surface 17 is located, at a distance from the surface 16 of the outer element, and is perpendicular to a connection part 18 between the two zones of the inner part 5'. As can be seen, the opening 13 or 14 is bounded by the surfaces 15 and 16 in the middle zone of the outer element 4'~ and by the surface 17 and the intermediate part 18 of the inner element 5'.
The embodiment shown in Figures 5 and 6, is an extension or modification of the construction according to Figs. 3 and 4, and provides a further degree of freedom for the joint cvnnection according to the invention.
Specifically, the plastic part 2 can also be moved in the axial direction in relation to the plastic part 1. The distance of axial movement permitted corresponds, of course, to the width of the opening 13 or 14.
Figure 7 illustrates the use of the joint connection as shown in Figures 3 and 4. Here a fastening element 19 is chosen as starting point. Element 19 has two shell-like elements 20 and 21. Element 21 carries the inner element 5' in a manner similar to the plastic part 2 represented in Figs. 1 to 6. The outer zone, that is, the outer element 4', is arranged in the bearing part of the fastening element 19, similar to the plastic part 1 in the embodiments according to Figures 1 to 6.
The outer element 4', as well as well as the inner element 5', is shaped similar to the construction shown in Figs. 3 and 4; that is, with arched and flat surfaces. As can be seen, by this construction the shell element 21 can `- ~3gJ ~3~
cover a great swinging range, and is thus more elastic in its mobility than the shell element 20 fastened to the corresponding bearing part through a prior art film hinge.
However, there is also the possibility to arran~e the shell element 20, similar to the joint connection o~ the shell element 2l, on the corresponding bearing part.
In Figs. 8 and 9 is shown another possible embodiment of joint connection according to the invention.
As can be seen, in this embodiment the outer element 4" has a smooth, closed circumferential zone which is formed by a ring 22. The inner element 5' is designed in peg form and is supported in the ring 22 through the peg 23. Here, in the drawing according to Figure 8, there is a significant interspace between the peg 23 and the ring 22, but according to the shape o~ construction this space may be designed smaller. ~he outer element 4" is arranged in the plastic part l through a stay 24; the inner element 511 i5 fastened, in turn, through a stay 25 to the plasti.c part 2.
All the above-mentioned joint connections accordiny to the invention are produced by being iniected one in the other, in the joint zone, from a single tool, while the two plastic parts l and 2 are connected movable relation to each other, in the corresponding joint zone ~. As a result of this joint connection, there is no danger of breakage at the point of rotationO While for the shaping of the joint connection according to the invention, as a ~urther advantage, there is no dependence on material.
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Claims (16)
1. A plastics component comprising two members articulated together by a connection such that they are at least partially relatively rotatable, the connection having an outer element which is formed on one of the members and an inner element which is formed on the other member and which is at least partially located within the outer element, both elements being moulded in the same mould, the inner element being moulded within the outer element in the said mould, wherein said connection comprises two portions extending substantially along the axis of relative rotation of the two members, the element cross-sections of one portion corresponding to that of the other portion when rotated through 180° relative thereto, but not otherwise.
2. A component as claimed in claim 1, wherein said inner element is substantially pin-shaped and in each said portion of the connection comprises a respective pair of radially opposed flat and curved surfaces oriented in the axial direction, and respective pairs of flat and curved surfaces of the outer element correspond to and radially oppose the pairs of flat and curved surfaces of the inner element.
3. A component as claimed in claim 2, wherein the pairs of surfaces of the inner element extend towards the axial middle of the inner element.
4. A component as claimed in claim 2 or 3, wherein a connecting member is arranged between the axially adjacent pairs of surfaces of the inner element.
5. A component as claimed in claim 4, wherein the outer element comprises radial openings in the region of the connecting member.
6. A component as claimed in claim 1, wherein in each said portion the outer element has an inner surface configuration comprising a planar and a curved surface and the inner element has an outer surface configuration comprising a curved and a planar surface.
7. A component as claimed in claim 6, wherein said portions extend to each other from respective opposed ends of the connection.
8. A component as claimed in claim 6 or 7, wherein said portions extend from respective opposed ends of the connection, and the elements define a cavity between said portions.
9. A component as claimed in claim 8, wherein said cavity is bounded by: (i) on the outer element, respective opposed plane surfaces disposed between the curved surface of the outer element in each said portion and the planar surface thereof in the other said portion, and respective further surfaces extending inwardly from said plane surfaces to said planar surfaces; and (ii) on the inner element, surfaces disposed oppositely to said further surfaces on the outer element, and surfaces of a web interconnecting the parts of the inner element in the portions of the connection.
10. A joint connection between two plastic parts, one part being at least partially rotatable in relation to the other part, characterized in that the joint connection consists of a shell-form outer element on the one plastic part, and an inner element at least partially supported in the outer element on the other plastic part, wherein both elements are made by being injection moulded one inside the other from one tool, and wherein the outer and inner elements have, in each case, two axial receiving zones angularly displaced by 180°.
11. The joint connection according to claim 10, wherein each axial receiving zone of the outer element is bounded by a flat and an arched end surface and wherein each axial receiving zone of the inner element approximates a segment of a circle bounded by an arc and a chord.
12. The joint connection according to claim 10, wherein each axial receiving zone of the inner and outer elements extends towards the axial middle of the inner element.
13. The joint connection according to claim 10, wherein the connection includes a transverse internal recess intermediate the two zones, to provide a slotted opening.
14. The joint connection according to claim 13, wherein the said internal recess is defined, on the outer element, by respective opposed plane surfaces disposed between (a) the arched end surface of the outer element in each said axial receiving zone thereof and (b) the flat thereof in the other said axial receiving zone, and by respective further surfaces extending inwardly from said plane surfaces to said flats; and wherein said internal recess is defined, on the inner element, by surfaces disposed oppositely to said further surfaces on the outer element, and by surfaces of a web interconnecting the two axial receiving zones of the inner element.
15. The joint connection according to claim 10, wherein the outer element has a closed circumferential zone, in which is supported the inner element, designed in axial form.
16. The joint connection according to claim 1, wherein the inner and outer elements are joined in each case through a connecting web on the particular plastic part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3725352.2 | 1987-07-30 | ||
| DE19873725352 DE3725352A1 (en) | 1987-07-30 | 1987-07-30 | JOINT CONNECTION BETWEEN TWO PLASTIC PARTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1303309C true CA1303309C (en) | 1992-06-16 |
Family
ID=6332756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000573444A Expired - Lifetime CA1303309C (en) | 1987-07-30 | 1988-07-29 | Joint connection between two plastic parts |
Country Status (6)
| Country | Link |
|---|---|
| CA (1) | CA1303309C (en) |
| DE (1) | DE3725352A1 (en) |
| FR (1) | FR2618839B1 (en) |
| GB (1) | GB2207459B (en) |
| NL (1) | NL8801894A (en) |
| SE (1) | SE470071B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01235619A (en) * | 1988-03-16 | 1989-09-20 | Kako Kanagata Seisakusho:Kk | Integral manufacture of hinge and container |
| DE4202351C2 (en) * | 1992-01-29 | 1995-01-19 | Fickenscher & Co Gmbh Werkzeug | Process for injection molding objects from at least two parts |
| US6053458A (en) * | 1998-01-08 | 2000-04-25 | Illinois Tool Works Inc. | Swivel hinge for a clip |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB593852A (en) * | 1945-06-15 | 1947-10-28 | Crown Fastener Corp | Method of producing buckles |
| GB593335A (en) * | 1945-06-15 | 1947-10-14 | Crown Fastener Corp | Hinge and method of producing the same |
| US3456913A (en) * | 1967-02-21 | 1969-07-22 | Michael Lutz | Mold for making a container having an integrally molded two-piece hinge |
| DE2411911A1 (en) * | 1974-03-13 | 1975-09-25 | Gerhard Neumann | Flexible snap fit hinge and joining profiles - with arcuate engaging profiles modified to change joint stiffness |
| IT1036469B (en) * | 1974-07-09 | 1979-10-30 | Anvar | PROCEDURE FOR THE MANUFACTURING OF ARTICLES COMPOSITE OF THERMOPLASTIC MATERIALS BY INJECTION MOLDING |
| JPS51151753A (en) * | 1975-06-20 | 1976-12-27 | Matsushita Electric Ind Co Ltd | Method of producing resin product with slide |
| DE2601345C2 (en) * | 1976-01-15 | 1985-03-07 | Kabo-Plastic Ing. Karl Boll, 7801 Feldkirch | Ball joint made from at least one plastic casting |
| FR2398348A1 (en) * | 1977-07-20 | 1979-02-16 | Ferodo Sa | POSITIONING DEVICE |
| DE3218962A1 (en) * | 1982-05-19 | 1983-11-24 | Springfix Befestigungstechnik | BALL PAN FOR A BALL JOINT |
| GB2131870B (en) * | 1982-12-06 | 1986-02-26 | Itw Ltd | Manufacturing techniques particularly applicable to buckles |
| US4579709A (en) * | 1983-11-23 | 1986-04-01 | Nicholas Ferrari | Method for molding hinged article |
| KR860002128B1 (en) * | 1984-07-10 | 1986-12-11 | 닛봉 노-숀 고오교오 가부시키 가이샤 | Swivel snap hook of synthetic resin and method of manufacturing the same |
| US4632357A (en) * | 1984-12-12 | 1986-12-30 | Holdt J W Von | Mold for making a bucket with bail |
-
1987
- 1987-07-30 DE DE19873725352 patent/DE3725352A1/en active Granted
-
1988
- 1988-07-28 NL NL8801894A patent/NL8801894A/en not_active Application Discontinuation
- 1988-07-29 GB GB8818156A patent/GB2207459B/en not_active Expired - Lifetime
- 1988-07-29 FR FR8810294A patent/FR2618839B1/en not_active Expired - Fee Related
- 1988-07-29 CA CA000573444A patent/CA1303309C/en not_active Expired - Lifetime
- 1988-07-29 SE SE8802761A patent/SE470071B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2207459A (en) | 1989-02-01 |
| DE3725352A1 (en) | 1989-02-09 |
| DE3725352C2 (en) | 1991-06-20 |
| NL8801894A (en) | 1989-02-16 |
| FR2618839A1 (en) | 1989-02-03 |
| FR2618839B1 (en) | 1994-01-07 |
| GB8818156D0 (en) | 1988-09-01 |
| SE8802761L (en) | 1989-01-31 |
| SE8802761D0 (en) | 1988-07-29 |
| GB2207459B (en) | 1991-04-10 |
| SE470071B (en) | 1993-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121205 |