US20170156451A1 - Injection molded mushroom type hook structure and hook strap including the same - Google Patents
Injection molded mushroom type hook structure and hook strap including the same Download PDFInfo
- Publication number
- US20170156451A1 US20170156451A1 US15/281,161 US201615281161A US2017156451A1 US 20170156451 A1 US20170156451 A1 US 20170156451A1 US 201615281161 A US201615281161 A US 201615281161A US 2017156451 A1 US2017156451 A1 US 2017156451A1
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- United States
- Prior art keywords
- injection molded
- head portion
- mushroom type
- hook
- hook structure
- 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.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B13/00—Hook or eye fasteners
- A44B13/0029—Hook or eye fasteners characterised by their way of fastening to the support
- A44B13/0035—Hook or eye fasteners characterised by their way of fastening to the support using prongs
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0061—Male or hook elements
- A44B18/0065—Male or hook elements of a mushroom type
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0049—Fasteners made integrally of plastics obtained by moulding processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/727—Fastening elements
- B29L2031/729—Hook and loop-type fasteners
Definitions
- the present invention relates generally to mechanical fasteners, and more specifically to an injection molded mushroom type hook structure and a hook strap including the same.
- Hook-and-loop type fastener is one of the mechanical surface fastener types and it is known as a “Velcro” type fastener.
- a hook-and-loop type fastener mainly includes a hook strap and a loop strap, wherein the hook strap includes a plastic substrate and a plurality of injection molded hooks formed on a surface of the substrate, and the loop strap has a plurality of fabric loops formed thereon to engage with the hooks on the hook strap so as to proved fastening effect.
- the hook-and-loop fasteners are wildly used in a variety of fields that need to fasten two separate parts together, such as garment, hats/caps, shoes, personal care product (such as diapers) etc., because of their easy engaging/disengaging characteristic.
- the injection molded mushroom type hook structure is one of the hook structures used in a hook strap of the hook-and-loop fastener.
- Traditional injection molded mushroom type hook structure includes a substantially cylindrical hook stem and a substantially circular head portion formed at a top end of the cylindrical stem, as illustrated in FIG. 1 .
- the effective engaging percentage is relative low because the smooth periphery of the circular head of the hook does not provide protruding portions that can engage with the fabric loops, and thus has a drawback of unable to provide sufficient fastening strength.
- circular-headed mushroom-type hooks can provide effective engaging only when the head of the hooks fully inserted into the fabric loops forming a lockup type engagement.
- this lockup type of engagement may provide a firm engagement
- the fabric loops usually will be destroyed by the hooks during a detaching operation between the hook strap and the loop strap, and after several times of engaging/detaching operations the fastening capability will drop sharply or even loosing the fastening capability because the percentage of the loops been destroyed increases as the engaging/detaching operation number increases.
- the effective lifetime of the circular-headed mushroom-type hooks is relative short.
- This improved injection molded mushroom type hook structure includes a substantially tetragonal stem and a substantially octagonal head portion form at a top end of the stem, as illustrated in FIG. 2 .
- the polygonal head portion of this hook structure provides a number of protrusions that may engage with the fabric loops to provide effective engagements and a higher engaging percentage with the loops.
- the improved injection molded mushroom type hook structure engages the loops with the protrusions of polygonal head portion, no loops will be destroyed during a detaching operation and thus a longer lifetime for the hook strap may be provided.
- this improved injection molded mushroom type hook structure has above-mentioned advantages, it still has its shortcomings.
- the hook-to-loop engaging rate of this mushroom type hook structure is not consistent in every direction. That is, the hook-to-loop engaging rate in a longitudinal direction is higher than the hook-to-loop engaging rate in a transverse direction.
- the engagement between the head portion and the loops is provided by the protrusions of the head portion, insufficient engagement strength between the hooks and the loops may occur at times.
- One object of the present invention is to provide a novel injection molded mushroom type hook structure that can achieve a better balance between the hook-to-loop engaging rate and the hook-to-loop engagement strength. Additionally, another object of the present invention is to provide an injection molded mushroom type hook structure that has a consistent in both a machine direction (MD) and a transverse direction (CD).
- MD machine direction
- CD transverse direction
- an injection molded mushroom type hook structure of the present invention includes:
- an injection molded mushroom type hook structure includes:
- an injection molded hook strap is provided.
- the hook strap includes:
- the hook strap includes:
- FIG. 1 is a schematic perspective drawing showing a traditional hook strap including mushroom type hooks
- FIG. 2 is a schematic perspective drawing showing a traditional hook strap including another form of mushroom type hooks
- FIG. 3 is a schematic perspective view showing an injection molded mushroom type hook structure according to a first embodiment of the present invention
- FIG. 4 is an end view of the injection molded mushroom type hook structure of FIG. 3 ;
- FIG. 5 is a top plane view of injection molded mushroom type hook structure of FIG. 3 ;
- FIG. 6 is a schematic perspective view showing an injection molded mushroom type hook structure according to a second embodiment of the present invention.
- FIG. 7 is an end view of the injection molded mushroom type hook structure of FIG. 6 ;
- FIG. 8 is a top plane view of injection molded mushroom type hook structure of FIG. 6 ;
- FIG. 9 is a schematic perspective view showing an injection molded hook strap according to an embodiment of a second aspect of the present invention.
- FIG. 10 is a schematic perspective view showing an injection molded hook strap according to another embodiment of a second aspect of the present invention.
- FIGS. 3-8 describe the features of the injection molded mushroom type hook structure according to preferred embodiments of the present invention.
- FIG. 3 is a schematic perspective view showing an injection molded mushroom type hook structure 300 according to a first embodiment of the present invention
- FIG. 4 is an end view of the injection molded mushroom type hook structure 300 of FIG. 3
- FIG. 5 is a top plane view of injection molded mushroom type hook structure 300 of FIG. 3 .
- the injection molded mushroom type hook structure 300 mainly includes a stem portion 310 and a head portion 320 integrally formed at a top end of the stem portion 310 .
- the stem portion 310 is a substantially tetragonal shape including two straight vertical side walls in a first direction (also referred as a transverse direction) CD, a straight vertical side wall and a slanted vertical side wall in a second direction (also referred as a machine direction) MD, wherein the first direction CD and the second direction MD are perpendicular with each other as shown in FIGS. 3-4 .
- the head portion 320 is integrally formed with the stem portion 310 and has a substantially planar shape.
- the head portion 320 includes two protrusion portions 330 , each protrusion portions 330 protruding outwardly from a respective one of two opposite sides of the head portion 320 in the first direction CD along a portion of a length of the side.
- the protrusion portion 330 is a semi-circular shape protrusion.
- the head portion 320 includes an extended portion 340 which extends outwardly from a side of the head portion 320 in the second direction MD along a substantial length of the side of the head portion (in this embodiment, the side is at the same side as the slanted vertical side of the stem portion 310 ) so that the extended portion 340 may have a width substantially the same as the length of the side, wherein a free end of the extended portion 340 curves downward slightly as a hook.
- the head portion 320 further includes four connection portions 350 which are formed at locations where one lateral side of each of the two protrusions 330 meets the extended portion 340 and the other lateral side of each of the two protrusions meets an adjacent side 360 of the head portion in the second direction. In the embodiment illustrated in FIGS.
- connection portion 350 is a curved connection portion that has a radius of curvature R that is larger than or equal to 0.03 mm (R ⁇ 0.03 mm).
- the head portion 320 of the injection molded mushroom type hook structure 300 has a polygonal shape contour when looked from top as shown in FIG. 5 .
- FIGS. 6 to 8 describe an injection molded mushroom type hook structure 400 according to a second embodiment of the present invention, wherein FIG. 6 is a schematic perspective view showing the injection molded mushroom type hook structure 400 ; FIG. 7 is an end view of the injection molded mushroom type hook structure 400 of FIG. 6 ; and FIG. 8 is a top plane view of injection molded mushroom type hook structure 400 of FIG. 6 .
- the injection molded mushroom type hook structure 400 of this embodiment has a structure substantially the same as that of the injection molded mushroom type hook structure 300 of the first embodiment. That is, the injection molded mushroom type hook structure 400 includes a stem portion 410 and a head portion 420 integrally formed at a top end of the stem portion 410 .
- connection portion 450 is also a curved connection portion that has a radius of curvature R that is larger than or equal to 0.03 mm (R ⁇ 0.03 mm).
- FIGS. 9 and 10 describe an injection molded hook strap 500 according to a second aspect of the present invention.
- the hook strap 500 includes a substrate 510 and a plurality of injection molded mushroom type hook structure 300 integrally formed on a surface of the substrate 510 . Additionally, another embodiment of the hook strap 500 includes a substrate 510 and a plurality of injection molded mushroom type hook structure 400 integrally formed on a surface of the substrate 510 , as illustrated in FIG. 10 .
- injection molded mushroom type hook structure 300 , 400 and the hook strap 500 according to the present invention may be manufactured by means of plastic injection molding.
- injection molded mushroom type hook structure 300 , 400 and the hook strap 500 according to the present invention may be manufactured by means of the manufacturing methods described in U.S. Pat. No. 9,259,060 B2, the entire disclosures of which are incorporated herein by reference.
- the injection molded mushroom type hook structure of the present invention can achieve following advantages:
- the injection molded mushroom type hook structure of the present invention includes structural features for engaging with the loops (i.e., the protrusion portions and the extended portions) in both the first direction (the transverse direction) and the second direction (the machine direction), there are no noticeable difference in hook-to-loop engaging rate between the first and second directions.
- the extended portion of the injection molded mushroom type hook structure of the present invention has a width substantially the same as the length of the side of the head portion from which it extends, the two corners at its free end can engage with loops in directions that offset an angle from the first direction and the second direction (such as, in directions that deviate 45 degree/30 degree from the first direction/second direction), so as to provide an injection molded mushroom type hook structure having a multiple-directional loops-engaging capability.
- connection portions formed at locations between adjacent protrusion portions and extended portions cab provide reinforcement effects to the protrusion portions and extended portions so that integrity of the protrusion portions and extended portions would not be deteriorated because of repeating usages after a period of time and thus the effective life of the hook structure may be extended substantially.
- the free end of the extended portion of the head portion of the injection molded mushroom type hook structure of the present invention is curved downward slightly as a hook so as to provide a more firm, and effective engagement with the loops and to proved a higher hook-to-loop engagement/peeling-off strength.
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
- Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Helmets And Other Head Coverings (AREA)
Abstract
One aspect of the present invention provides an injection molded mushroom type hook structure. The injection molded mushroom type hook structure of the present invention includes a stem portion and a substantially planar head portion formed at a top end of the stem portion, wherein the head portion includes two protrusion portions extending outwardly at two opposite sides of the head portion in a first direction, at least one extended portions extending outwardly from one side of the head portion in a second direction substantially perpendicular to the protrusions, and four connection portions that are formed at locations where the lateral sides of the two protrusion portions meet adjacent extended portion and the head portion. These structural features allow the injection molded mushroom type hook structure of the present invention to have a substantially same hook-to-loop engagement rate in each direction and an improved hook-to-loop engagement/peeling-off strength. Another aspect of the present invention provides an injection molded hook strap including the hook structure.
Description
- The present invention relates generally to mechanical fasteners, and more specifically to an injection molded mushroom type hook structure and a hook strap including the same.
- Hook-and-loop type fastener is one of the mechanical surface fastener types and it is known as a “Velcro” type fastener. A hook-and-loop type fastener mainly includes a hook strap and a loop strap, wherein the hook strap includes a plastic substrate and a plurality of injection molded hooks formed on a surface of the substrate, and the loop strap has a plurality of fabric loops formed thereon to engage with the hooks on the hook strap so as to proved fastening effect. The hook-and-loop fasteners are wildly used in a variety of fields that need to fasten two separate parts together, such as garment, hats/caps, shoes, personal care product (such as diapers) etc., because of their easy engaging/disengaging characteristic.
- The injection molded mushroom type hook structure is one of the hook structures used in a hook strap of the hook-and-loop fastener. Traditional injection molded mushroom type hook structure includes a substantially cylindrical hook stem and a substantially circular head portion formed at a top end of the cylindrical stem, as illustrated in
FIG. 1 . However, when engaging the circular-headed mushroom-type hooks illustrated inFIG. 1 with the fabric loops on the loop strap, the effective engaging percentage is relative low because the smooth periphery of the circular head of the hook does not provide protruding portions that can engage with the fabric loops, and thus has a drawback of unable to provide sufficient fastening strength. Additionally, circular-headed mushroom-type hooks can provide effective engaging only when the head of the hooks fully inserted into the fabric loops forming a lockup type engagement. However, although this lockup type of engagement may provide a firm engagement, the fabric loops usually will be destroyed by the hooks during a detaching operation between the hook strap and the loop strap, and after several times of engaging/detaching operations the fastening capability will drop sharply or even loosing the fastening capability because the percentage of the loops been destroyed increases as the engaging/detaching operation number increases. As a result, the effective lifetime of the circular-headed mushroom-type hooks is relative short. - In order to overcome the drawbacks of the circular-headed mushroom-type hooks mentioned above, the inventor of the present application has proposed an improved injection molded mushroom type hook structure in Taiwan Patent No. 1371247. This improved injection molded mushroom type hook structure includes a substantially tetragonal stem and a substantially octagonal head portion form at a top end of the stem, as illustrated in
FIG. 2 . The polygonal head portion of this hook structure provides a number of protrusions that may engage with the fabric loops to provide effective engagements and a higher engaging percentage with the loops. In addition, because the improved injection molded mushroom type hook structure engages the loops with the protrusions of polygonal head portion, no loops will be destroyed during a detaching operation and thus a longer lifetime for the hook strap may be provided. Although this improved injection molded mushroom type hook structure has above-mentioned advantages, it still has its shortcomings. For instance, the hook-to-loop engaging rate of this mushroom type hook structure is not consistent in every direction. That is, the hook-to-loop engaging rate in a longitudinal direction is higher than the hook-to-loop engaging rate in a transverse direction. Additionally, because the engagement between the head portion and the loops is provided by the protrusions of the head portion, insufficient engagement strength between the hooks and the loops may occur at times. - In view of the above drawbacks and limitations of the existed injection molded mushroom type hook structures, it gives the inventor of the present application a strong motivation to create an injection molded mushroom type hook structure to overcome all these drawbacks and after long and tedious researches and trials, a novel injection molded mushroom type hook structure has finally accomplished.
- One object of the present invention is to provide a novel injection molded mushroom type hook structure that can achieve a better balance between the hook-to-loop engaging rate and the hook-to-loop engagement strength. Additionally, another object of the present invention is to provide an injection molded mushroom type hook structure that has a consistent in both a machine direction (MD) and a transverse direction (CD).
- The above objects may be achieved by an injection molded mushroom type hook structure of the present invention. According to a first embodiment of the present invention, an injection molded mushroom type hook structure includes:
-
- a stem portion;
- a substantially planar head portion formed at a top end of the stem portion, the head portion including:
- two protrusions each protruding outwardly from a respective one of two opposite sides of the head portion in a first direction along a portion of a length of the side;
- an extended portion extending outwardly from a side of the head portion in a second direction that is perpendicular to the first direction along a substantial length of the side, wherein a free end of the extended portion curves downward slightly as a hook; and
- four connection portions formed at locations where one lateral side of each of the two protrusions adjacent to the extended portion meets the extended portion and the other lateral side of each of the two protrusions meets an adjacent side of the head portion in the second direction.
- According to a second embodiment of the present invention, an injection molded mushroom type hook structure includes:
-
- a stem portion;
- a substantially planar head portion formed at a top end of the stem portion, the head portion including:
- two protrusions each protruding outwardly from a respective one of two opposite sides of the head portion in a first direction along a portion of a length of the side;
- two extended portions each extending outwardly from a side of the head portion in a second direction that is perpendicular to the first direction along a substantial length of the side, wherein a free end of each of the extended portions curves downward slightly as a hook; and
- four connection portions formed at locations where the lateral sides of each of the two protrusions meet adjacent lateral sides of each of the extended portions.
- According to another aspect of the present invention, an injection molded hook strap is provided. The hook strap includes:
-
- a substrate; and
- a plurality of injection molded mushroom type hooks integrally formed on a surface of the substrate, wherein each of the injection molded mushroom type hooks comprising:
- a stem portion; and
- a substantially planar head portion formed at a top end of the stem portion, the head portion including:
- two protrusions each protruding outwardly from a respective one of two opposite sides of the head portion in a first direction along a portion of a length of the side;
- an extended portion extending outwardly from a side of the head portion in a second direction that is perpendicular to the first direction along a substantial length of the side, wherein a free end of the extended portion curves downward slightly as a hook; and
- four connection portions formed at locations where one lateral side of each of the two protrusions meets the extended portion and the other lateral side of each of the two protrusions meets an adjacent side of the head portion in the second direction.
- According to another embodiment, the hook strap includes:
-
- a substrate; and
- a plurality of injection molded mushroom type hooks integrally formed on a surface of the substrate, wherein each of the injection molded mushroom type hooks comprising:
- a stem portion; and
- a substantially planar head portion formed at a top end of the stem portion, the head portion including:
- two protrusions each protruding outwardly from a respective one of two opposite sides of the head portion in a first direction along a portion of a length of the side;
- two extended portions each extending outwardly from a side of the head portion in a second direction that is perpendicular to the first direction along a substantial length of the side, wherein a free end of each of the extended portions curves downward slightly as a hook; and
- four connection portions formed at locations where the lateral sides of each of the two protrusions meet adjacent lateral sides of each of the extended portions.
- Features and objects of the present invention other than the above will become clear by reading the description of the present specification with reference to the accompanying drawings.
- For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein:
-
FIG. 1 is a schematic perspective drawing showing a traditional hook strap including mushroom type hooks; -
FIG. 2 is a schematic perspective drawing showing a traditional hook strap including another form of mushroom type hooks; -
FIG. 3 is a schematic perspective view showing an injection molded mushroom type hook structure according to a first embodiment of the present invention; -
FIG. 4 is an end view of the injection molded mushroom type hook structure ofFIG. 3 ; -
FIG. 5 is a top plane view of injection molded mushroom type hook structure ofFIG. 3 ; -
FIG. 6 is a schematic perspective view showing an injection molded mushroom type hook structure according to a second embodiment of the present invention; -
FIG. 7 is an end view of the injection molded mushroom type hook structure ofFIG. 6 ; -
FIG. 8 is a top plane view of injection molded mushroom type hook structure ofFIG. 6 ; -
FIG. 9 is a schematic perspective view showing an injection molded hook strap according to an embodiment of a second aspect of the present invention; and -
FIG. 10 is a schematic perspective view showing an injection molded hook strap according to another embodiment of a second aspect of the present invention. - Referring now to
FIGS. 3-8 to describe the features of the injection molded mushroom type hook structure according to preferred embodiments of the present invention. -
FIG. 3 is a schematic perspective view showing an injection molded mushroomtype hook structure 300 according to a first embodiment of the present invention;FIG. 4 is an end view of the injection molded mushroomtype hook structure 300 ofFIG. 3 ; andFIG. 5 is a top plane view of injection molded mushroomtype hook structure 300 ofFIG. 3 . - As shown in
FIGS. 3-5 , the injection molded mushroomtype hook structure 300 according to this embodiment mainly includes astem portion 310 and ahead portion 320 integrally formed at a top end of thestem portion 310. In this embodiment, thestem portion 310 is a substantially tetragonal shape including two straight vertical side walls in a first direction (also referred as a transverse direction) CD, a straight vertical side wall and a slanted vertical side wall in a second direction (also referred as a machine direction) MD, wherein the first direction CD and the second direction MD are perpendicular with each other as shown inFIGS. 3-4 . Thehead portion 320 is integrally formed with thestem portion 310 and has a substantially planar shape. Thehead portion 320 includes twoprotrusion portions 330, eachprotrusion portions 330 protruding outwardly from a respective one of two opposite sides of thehead portion 320 in the first direction CD along a portion of a length of the side. In this embodiment, theprotrusion portion 330 is a semi-circular shape protrusion. Additionally, thehead portion 320 includes anextended portion 340 which extends outwardly from a side of thehead portion 320 in the second direction MD along a substantial length of the side of the head portion (in this embodiment, the side is at the same side as the slanted vertical side of the stem portion 310) so that theextended portion 340 may have a width substantially the same as the length of the side, wherein a free end of theextended portion 340 curves downward slightly as a hook. Thehead portion 320 further includes fourconnection portions 350 which are formed at locations where one lateral side of each of the twoprotrusions 330 meets theextended portion 340 and the other lateral side of each of the two protrusions meets anadjacent side 360 of the head portion in the second direction. In the embodiment illustrated inFIGS. 3-5 , theconnection portion 350 is a curved connection portion that has a radius of curvature R that is larger than or equal to 0.03 mm (R≧0.03 mm). Thehead portion 320 of the injection molded mushroomtype hook structure 300 has a polygonal shape contour when looked from top as shown inFIG. 5 . - Next, references are made to
FIGS. 6 to 8 to describe an injection molded mushroomtype hook structure 400 according to a second embodiment of the present invention, whereinFIG. 6 is a schematic perspective view showing the injection molded mushroomtype hook structure 400;FIG. 7 is an end view of the injection molded mushroomtype hook structure 400 ofFIG. 6 ; andFIG. 8 is a top plane view of injection molded mushroomtype hook structure 400 ofFIG. 6 . - As illustrated in
FIGS. 6-8 , the injection molded mushroomtype hook structure 400 of this embodiment has a structure substantially the same as that of the injection molded mushroomtype hook structure 300 of the first embodiment. That is, the injection molded mushroomtype hook structure 400 includes astem portion 410 and ahead portion 420 integrally formed at a top end of thestem portion 410. The main differences between the injection molded mushroomtype hook structure 400 of this embodiment and the injection molded mushroomtype hook structure 300 of the first embodiment reside in that thestem portion 410 of injection molded mushroomtype hook structure 400 of this embodiment includes two slanted vertical side walls and in addition to twoprotrusion portions 430 protruding outwardly from two opposite sides in the first direction CD of thehead portion 420, thehead portion 420 further includes twoextended portions 440 extending outwardly from two opposite sides in the second direction MD and fourconnection portions 450 formed at locations between lateral sides ofadjacent protrusion portion 430 andextended portion 440, as illustrated inFIGS. 6 and 8 . Similar to theconnection portion 350,connection portion 450 is also a curved connection portion that has a radius of curvature R that is larger than or equal to 0.03 mm (R≧0.03 mm). - Next, references are made to
FIGS. 9 and 10 to describe an injection moldedhook strap 500 according to a second aspect of the present invention. - As shown in
FIG. 9 , thehook strap 500 includes asubstrate 510 and a plurality of injection molded mushroomtype hook structure 300 integrally formed on a surface of thesubstrate 510. Additionally, another embodiment of thehook strap 500 includes asubstrate 510 and a plurality of injection molded mushroomtype hook structure 400 integrally formed on a surface of thesubstrate 510, as illustrated inFIG. 10 . - The injection molded mushroom
type hook structure hook strap 500 according to the present invention may be manufactured by means of plastic injection molding. For instance, injection molded mushroomtype hook structure hook strap 500 according to the present invention may be manufactured by means of the manufacturing methods described in U.S. Pat. No. 9,259,060 B2, the entire disclosures of which are incorporated herein by reference. - With the unique structural features described above, the injection molded mushroom type hook structure of the present invention can achieve following advantages:
- 1. Because the injection molded mushroom type hook structure of the present invention includes structural features for engaging with the loops (i.e., the protrusion portions and the extended portions) in both the first direction (the transverse direction) and the second direction (the machine direction), there are no noticeable difference in hook-to-loop engaging rate between the first and second directions.
- 2. Because the extended portion of the injection molded mushroom type hook structure of the present invention has a width substantially the same as the length of the side of the head portion from which it extends, the two corners at its free end can engage with loops in directions that offset an angle from the first direction and the second direction (such as, in directions that deviate 45 degree/30 degree from the first direction/second direction), so as to provide an injection molded mushroom type hook structure having a multiple-directional loops-engaging capability.
- 3. The connection portions formed at locations between adjacent protrusion portions and extended portions cab provide reinforcement effects to the protrusion portions and extended portions so that integrity of the protrusion portions and extended portions would not be deteriorated because of repeating usages after a period of time and thus the effective life of the hook structure may be extended substantially.
- 4. The free end of the extended portion of the head portion of the injection molded mushroom type hook structure of the present invention is curved downward slightly as a hook so as to provide a more firm, and effective engagement with the loops and to proved a higher hook-to-loop engagement/peeling-off strength.
- Although the aspects of the present invention have been described above according to preferred embodiments of the hook structures and hook straps including the hook structures illustrated in the accompanying drawings, this does not mean that the scope of the present invention is limited to specific structures described above. In fact, there exist various modifications and variations under the principle and spirit disclosed above.
- It will be apparent to people skilled in this art that many modifications can be made to the disclosed structures without departing from the true scope of the invention defined by the appended claims. Therefore, it is the intent of the appended claims to cover all such variations and modifications as come within the sprit and scope of this invention.
Claims (16)
1. An injection molded mushroom type hook structure comprising:
a stem portion;
a substantially planar head portion formed at a top end of the stem portion, the head portion comprising:
two protrusions each protruding outwardly from a respective one of two opposite sides of the head portion in a first direction along a portion of a length of the side;
an extended portion extending outwardly from a side of the head portion in a second direction that is perpendicular to the first direction along a substantial length of the side, wherein a free end of the extended portion curves downward slightly as a hook; and
four connection portions formed at locations where one lateral side of each of the two protrusions adjacent to the extended portion meets the extended portion and the other lateral side of each of the two protrusions meets an adjacent side of the head portion in the second direction.
2. An injection molded mushroom type hook structure comprising:
a stem portion;
a substantially planar head portion formed at a top end of the stem portion, the head portion comprising:
two protrusions each protruding outwardly from a respective one of two opposite sides of the head portion in a first direction along a portion of a length of the side;
two extended portions each extending outwardly from a side of the head portion in a second direction that is perpendicular to the first direction along a substantial length of the side, wherein a free end of each of the extended portions curves downward slightly as a hook; and
four connection portions formed at locations where the lateral sides of each of the two protrusions meet adjacent lateral sides of each of the extended portions.
3. An injection molded mushroom type hook structure according to claim 1 , wherein the connection portion is a curved connection portion that has a radius of curvature R that is larger than or equal to 0.03 mm (R≧0.03 mm).
4. An injection molded mushroom type hook structure according to claim 1 , wherein the stem portion and the head portion are integrally formed as a single entity.
5. An injection molded mushroom type hook structure according to claim 1 , wherein the head portion has a polygonal contour.
6. An injection molded hook strap comprising:
a substrate; and
a plurality of injection molded mushroom type hooks according to claim 1 integrally formed on a surface of the substrate.
7. An injection molded hook strap according to claim 6 , wherein the connection portion is a curved connection portion that has a radius of curvature R that is larger than or equal to 0.03 mm (R≧0.03 mm).
8. An injection molded hook strap according to claim 6 , wherein the stem portion and the head portion are integrally formed as a single entity.
9. An injection molded hook strap according to claim 6 , wherein the head portion has a polygonal contour.
10. An injection molded mushroom type hook structure according to claim 2 , wherein the connection portion is a curved connection portion that has a radius of curvature R that is larger than or equal to 0.03 mm (R≧0.03 mm).
11. An injection molded mushroom type hook structure according to claim 2 , wherein the stem portion and the head portion are integrally formed as a single entity.
12. An injection molded mushroom type hook structure according to claim 2 , wherein the head portion has a polygonal contour.
13. An injection molded hook strap comprising:
a substrate; and
a plurality of injection molded mushroom type hooks according to claim 2 integrally formed on a surface of the substrate.
14. An injection molded hook strap according to claim 13 , wherein the connection portion is a curved connection portion that has a radius of curvature R that is larger than or equal to 0.03 mm (R≧0.03 mm).
15. An injection molded hook strap according to claim 13 , wherein the stem portion and the head portion are integrally formed as a single entity.
16. An injection molded hook strap according to claim 13 , wherein the head portion has a polygonal contour.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/381,506 US20190231034A1 (en) | 2015-12-03 | 2019-04-11 | Injection molded mushroom type hook structure and hook strap including the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW104140462A TWI555477B (en) | 2015-12-03 | 2015-12-03 | Mushroom Head Shot Hook and Velcro with the Mushroom Head Shot |
TW104140462 | 2015-12-03 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/381,506 Division US20190231034A1 (en) | 2015-12-03 | 2019-04-11 | Injection molded mushroom type hook structure and hook strap including the same |
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Publication Number | Publication Date |
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US20170156451A1 true US20170156451A1 (en) | 2017-06-08 |
Family
ID=57133008
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US15/281,161 Abandoned US20170156451A1 (en) | 2015-12-03 | 2016-09-30 | Injection molded mushroom type hook structure and hook strap including the same |
US16/381,506 Abandoned US20190231034A1 (en) | 2015-12-03 | 2019-04-11 | Injection molded mushroom type hook structure and hook strap including the same |
Family Applications After (1)
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US16/381,506 Abandoned US20190231034A1 (en) | 2015-12-03 | 2019-04-11 | Injection molded mushroom type hook structure and hook strap including the same |
Country Status (6)
Country | Link |
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US (2) | US20170156451A1 (en) |
EP (1) | EP3175734B1 (en) |
JP (1) | JP6266693B2 (en) |
KR (1) | KR101846262B1 (en) |
AU (1) | AU2016244194B2 (en) |
TW (1) | TWI555477B (en) |
Cited By (3)
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US20180368534A1 (en) * | 2015-12-24 | 2018-12-27 | Ykk Corporation | Molded Surface Fastener and Molded Surface Fastener Manufacturing Method |
US20190008239A1 (en) * | 2015-12-24 | 2019-01-10 | Ykk Corporation | Molded Surface Fastener, Molded Surface Fastener Manufacturing Method, and Molding Apparatus |
CN113891664A (en) * | 2019-05-31 | 2022-01-04 | 3M创新有限公司 | Connecting sheet and clothing adhesive product |
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US20190008239A1 (en) * | 2015-12-24 | 2019-01-10 | Ykk Corporation | Molded Surface Fastener, Molded Surface Fastener Manufacturing Method, and Molding Apparatus |
US11089845B2 (en) * | 2015-12-24 | 2021-08-17 | Ykk Corporation | Molded surface fastener |
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CN113891664A (en) * | 2019-05-31 | 2022-01-04 | 3M创新有限公司 | Connecting sheet and clothing adhesive product |
Also Published As
Publication number | Publication date |
---|---|
US20190231034A1 (en) | 2019-08-01 |
KR101846262B1 (en) | 2018-04-06 |
TWI555477B (en) | 2016-11-01 |
EP3175734A1 (en) | 2017-06-07 |
AU2016244194A1 (en) | 2017-06-22 |
KR20170065441A (en) | 2017-06-13 |
JP6266693B2 (en) | 2018-01-24 |
TW201720326A (en) | 2017-06-16 |
EP3175734B1 (en) | 2018-10-24 |
AU2016244194B2 (en) | 2018-06-14 |
JP2017099847A (en) | 2017-06-08 |
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