CN209873300U - Elastic buffering presser foot - Google Patents
Elastic buffering presser foot Download PDFInfo
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- CN209873300U CN209873300U CN201920238955.9U CN201920238955U CN209873300U CN 209873300 U CN209873300 U CN 209873300U CN 201920238955 U CN201920238955 U CN 201920238955U CN 209873300 U CN209873300 U CN 209873300U
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- plate
- pressing plate
- presser foot
- rectangular groove
- strip
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Abstract
The utility model relates to a weaving sewing tool. The elastic buffer presser foot can effectively solve the problems of quality and efficiency caused by different fabric layer numbers. The technical scheme is as follows: an elastic buffer presser foot comprises a connector fixedly connected with the bottom end of a pressure rod and a pressing plate which is hinged with the connector through two hinge lugs at the upper part of the elastic buffer presser foot and is provided with a needle hole; the method is characterized in that: the pressing plate is also provided with a movable plate which can move in the vertical direction and at least one first elastic element which is positioned in the pressing plate and applies downward pressure to the movable plate; a rectangular groove is formed in the center of the pressing plate, extends forwards and backwards and penetrates through the pressing plate in the vertical direction; the movable plate can be movably embedded into the rectangular groove up and down, and the bottom end plane of the movable plate is flush with the bottom surface of the pressing plate and has a moving space in the vertical upward direction; the rear end edge of the moving plate and the rear side edge of the rectangular groove are combined to form the pinhole.
Description
Technical Field
The utility model relates to a textile sewing tool, in particular to a presser foot of a sewing machine.
Background
The working principle of the sewing machine is as follows: the needle carries the sewing thread to insert the fabric regularly, and forms a coil by being sleeved and matched with a rotating shuttle in the sewing machine table 20; two cloth feeding racks 21 which are arranged in the bedplate and are positioned at the left side and the right side of the machine needle protrude upwards at fixed time, and are matched with the presser foot of the sewing machine to clamp the fabric on the sewing bedplate and move forwards; the normal sewing stitch can be formed only by the mutual matching of the parts.
However, in the clothes and the knitted clothes, due to the folding of the fabric, the number of the sewing layers is larger than that of other parts in a plurality of parts (such as common lower hem sewing parts and crotch sewing parts); if the areas of the parts are large, the sewing effect is not influenced (the cloth feeding rack can be matched with a presser foot of the sewing machine to normally push the fabric); however, if the areas of these parts are small (e.g. less than 3X 3mm), even a certain point is especially protruded (called high point, the same shall apply hereinafter); when the sewing machine sews the high point parts, the high point is easily embedded between the two cloth feeding racks, so that the presser foot of the sewing machine is lifted and suspended by the high point parts, the cloth feeding racks on the left side and the right side of the needle cannot cooperate with the presser foot to grasp the fabric beside the high point, the fabric cannot be pushed to advance, and the sewing cannot be continued; usually, an operator can only adopt a mode of cloth liner beside a high point to relieve, so that the sewing efficiency is reduced, and meanwhile, the sewing thread feet are different in size, and the product quality is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of above-mentioned background art, provide an elasticity buffering presser foot, this elasticity buffering presser foot should be able to effectively overcome quality, the efficiency problem that leads to because of the surface fabric number of piles is different.
The utility model provides a technical scheme is:
an elastic buffer presser foot comprises a connector fixedly connected with the bottom end of a pressure rod and a pressing plate which is hinged with the connector through two hinge lugs at the upper part of the elastic buffer presser foot and is provided with a needle hole; the method is characterized in that: the pressing plate is also provided with a movable plate which can move in the vertical direction and at least one first elastic element which is positioned in the pressing plate and applies downward pressure to the movable plate; a rectangular groove is formed in the center of the pressing plate, extends forwards and backwards and penetrates through the pressing plate in the vertical direction; the movable plate can be movably embedded into the rectangular groove up and down, and the bottom end plane of the movable plate is flush with the bottom surface of the pressing plate and has a moving space in the vertical upward direction; the rear end edge of the moving plate and the rear side edge of the rectangular groove are combined to form the pinhole.
A cavity which is communicated back and forth and up and down to facilitate the hinging with the connector is arranged between the two hinging lugs of the pressing plate; the cavity is also correspondingly arranged and communicated with the rectangular groove, and the elastic element is arranged in the cavity and respectively applies vertical jacking force to the connector and the movable piece.
The bottom surface of the connector and the upper surface of the moving plate are respectively provided with a salient point matched with the elastic element.
A barrier strip transversely arranged at the edge of the rear side of the rectangular groove is manufactured at the rear side of the pressing plate, the rear end of the moving plate extends upwards for a plurality of distances to enter the cavity, then extends backwards by clinging to the upper edge of the barrier strip, and is fixedly connected with a transversely arranged rear barrier strip after passing through the cavity; the end part of the front end of the moving plate penetrates through the rectangular groove upwards and is then fixedly connected with a front baffle strip transversely arranged on the front side of the hinge lug; the length of the front barrier strip and the length of the rear barrier strip are both larger than the width of the rectangular groove so as to limit the displacement of the movable plate in the front-back direction and the left-right direction.
The outer sides of the hinge lugs on the left side and the right side of the pressure plate are respectively provided with a flange strip capable of moving vertically and a second elastic element which is positioned on the hinge lugs and applies downward pressure to the flange strip; the bottom end of the edge blocking strip is 1-2mm lower than the bottom end of the pressing plate.
The edge blocking strips vertically move on the hinge lugs through the guide rail pairs; the guide rail pair comprises a sliding groove which is vertically manufactured on the outer side of the hinge lug, a cover plate which is blocked outside the sliding groove and is fixed with the hinge lug, and a sliding strip which is vertically arranged on the edge blocking strip and can be embedded into the sliding groove in a sliding mode.
The first elastic element and the second elastic element are both helical springs.
The utility model discloses a theory of operation is: when in use, the utility model is firstly arranged on the press rod of the sewing machine; when the elastic buffering presser foot works, under the pressure action of the pressure rod, the flange strips on the two sides of the elastic buffering presser foot can move upwards to enable the bottom end of the elastic buffering presser foot to be flush with the bottom end of the pressure plate, so that the pressure plate can directly contact the fabric to be sewn; and the periodically swinging cloth feeding rack is matched with the pressing plate at regular time to push the fabric together (see figure 15). When a certain high point part is sewn, the high point part can press the movable piece to enable the movable piece to automatically move upwards under pressure to give way, so that the high point part is embedded into a space for giving way of the movable piece, and a pressing plate is ensured not to be suspended so as to be still matched with the cloth feeding rack for normally pushing the fabric; thereby ensuring the balance of sewing stitches, stably improving the product quality and greatly improving the working efficiency.
The utility model has the advantages that: the elastic buffering presser foot provided by the utility model can prevent the presser foot of the sewing machine from being suspended by the high point part when sewing fabric parts with different sewing heights, thereby ensuring that the presser foot can still be in close contact with the fabric to be sewn around the high point, and ensuring that the presser foot can be normally matched with the step feeding rack to apply driving force to the fabric; thereby ensuring the balance of sewing stitches, stably improving the product quality, reducing the production cost and having stronger practicability.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a schematic bottom view of the present invention.
Fig. 4 is a left side view structure diagram of the present invention.
Fig. 5 is a schematic view of the enlarged structure of the rotor according to the present invention (in the same direction as the position in fig. 4).
Fig. 6 is a schematic bottom view of the moving plate of the present invention.
Fig. 7 is a schematic sectional view taken along the line a-a in fig. 4 (the connecting head portion is not shown in section).
Fig. 8 is a schematic sectional view of the structure of fig. 4 taken along line B-B.
Fig. 9 is a schematic front view of the connector of the present invention.
Fig. 10 is a schematic front view of the pressing plate according to the present invention.
Fig. 11 is a schematic top view of the pressing plate according to the present invention.
Fig. 12 is a left side view of the pressing plate according to the present invention.
Fig. 13 is a front view structure diagram of the edge strip of the present invention.
Fig. 14 is a schematic top view of the edge strip of the present invention.
Fig. 15 is a schematic view of the matching relationship between the middle pressing plate and the cloth feeding rack of the present invention.
Detailed Description
The following further description is made with reference to the embodiments shown in the drawings.
The elastic buffer presser foot shown in the attached drawing comprises a connector 1 and a pressing plate 8 which is hinged with the connector and is provided with a needle hole 8.11 (a hole through which a needle passes during sewing); the upper part of the connector is provided with a hoop 1.2 which is suitable for the needle bar of the sewing machine, and the presser foot can be fastened on the head of the sewing machine by screwing a screw 12 which is connected with the hoop. The upper part of the pressure plate is provided with two hinge lugs 5 which are connected with the pressure plate into a whole, and the hinge lugs are provided with pin holes 8.5 which are transversely communicated; a cavity 5.3 which is through from front to back and up and down is also arranged between the two hinge lugs; the lower part 1.1 (which is prefabricated with a hinge hole) of the connector is inserted into the cavity, and after the hinge pin is transversely inserted, the pressing plate is hinged with the connector into a whole; the width direction of the pressing plate is arranged corresponding to two cloth feeding racks (two cloth feeding racks positioned at the left side and the right side of the needle) on the sewing machine table (see figure 15, the length direction of the cloth feeding racks is vertical to the paper surface of figure 15).
The above is a conventional structure of a presser foot of a sewing machine.
The utility model discloses an improvement is:
a movable plate 6 which can move in the vertical direction is also positioned on the pressing plate, and at least one first elastic element 12 is also arranged on the pressing plate and applies downward pressure to the movable plate; a rectangular groove 8.1 is formed in the center of the pressing plate, extends in the front-back direction (left-right direction in fig. 1-3 and 11) of the pressing plate and penetrates through the pressing plate in the vertical direction (up-down direction in fig. 1); the width of the rectangular groove (up-down direction in fig. 11) is one half to one third (preferably 3-4mm) of the pressure plate and is centered on the pressure plate in the width direction, the front side of the rectangular groove (right side in fig. 11) is communicated with the needle hole, and the rear side of the rectangular groove is provided with a barrier strip 8.2 (the length of the rectangular groove is greater than the width of the rectangular groove; preferably 5-8 mm). Obviously, the area of the rectangular groove is obviously larger than that of the high point on the clothes, and the high point can be contained to be embedded when the fabric is sewn.
The movable piece can be movably embedded into the rectangular groove up and down, when the movable piece is at the lowest position in the pressing plate (in a non-working state), the bottom end plane of the movable piece is flush with the bottom surface of the pressing plate, and a moving space is formed in the vertical upward direction (namely the upper side of the figure 1) (when the movable piece is pressed upwards by a pressure larger than the elastic element, the movable piece can move upwards by 1-2 mm); the pinhole is formed by the combination of the front edge (right side in fig. 2 and 3) of the rotor and the front edge (right side in fig. 1) of the rectangular groove.
The cavity between the two hinged lugs of the pressing plate is also arranged corresponding to the rectangular groove, and the first elastic element (preferably a spiral spring) is arranged in the cavity and applies upward vertical jacking force to the connector and downward vertical jacking force to the moving plate. Two coil springs are shown in FIG. 7; the bottom surface of the connector is provided with a salient point 1.12 matched with the elastic element, and the upper surface of the moving plate is provided with a salient point 6.3 matched with the elastic element, so that the stable positioning of the spiral spring is ensured. The rear sides of the two hinge lugs are connected by a transverse and horizontally arranged crosspiece 5.1; the projection 1.11 at the left end of the coupling head is inserted on the underside of the crosspiece and bears against the crosspiece under the pressure of the helical spring, so that the clockwise pivoting of the coupling head is limited.
A barrier strip 8.2 is manufactured on the rear side (the left side in the figure 1) of the pressing plate and is transversely arranged on the rear side of the rectangular groove (as the rear side edge of the rectangular groove); the rear end (the left side of figures 6 and 7) of the moving plate 6 extends upwards for a plurality of distances to enter the cavity, then closely adheres to the upper edge of the barrier strip to extend backwards, then passes through the cavity and is fixedly connected with a rear barrier strip 6.2 transversely (the direction vertical to the paper of figures 6 and 7) arranged at the rear side of the hinge lug; the front end part of the moving plate penetrates through the rectangular groove upwards and then is fixedly connected with a front baffle strip 6.1 which is transversely (vertical to the paper surface direction of figure 1) arranged at the front side of the hinge lug; the length of preceding blend stop and the length of back blend stop all are greater than the width of rectangular channel to the both ends of preceding blend stop, back blend stop all shelve on the clamp plate, make the rotor all receive the stopping of hinge lug in front and back direction, left and right directions (the paper direction of perpendicular to figure 1), and receive stopping of clamp plate in down direction, only have up activity space (when receiving the direction up and be greater than the top pressure of coil spring pressure, the rotor just can up move).
The outer sides of the hinged lugs at the left side and the right side of the pressure plate are respectively provided with a flange strip 7 which can vertically move (in the vertical direction of the figure 1) and a second elastic element 11 which is positioned on the hinged lugs and applies downward pressure to the flange strips; after the pressure of the second elastic element is applied, the bottom end of the flange strip is 1-2mm lower than the bottom end of the pressing plate (namely, the pressing plate is lifted up by 1-2mm relatively).
The vertical movement of the edge blocking strips on the hinge lugs is realized through the guide rail pair; in the guide rail pair, a sliding groove (rectangular sliding groove) 5.2 which is vertically arranged is manufactured on the outer side of a hinge lug, a sliding strip 2 which is suitable for the size of the sliding groove is embedded into the sliding groove in a sliding mode, a cover plate 3 covers the outer portion of the sliding groove (blocks the sliding strip to enable the sliding strip not to slip from the sliding groove) and is fixed with the hinge lug through a screw 10 to ensure that the sliding strip can only vertically slide up and down. It can be seen in the figure that: the sliding strip and the flange strip are vertically arranged and the bottom end of the sliding strip is connected with the flange strip into a whole, so that the flange strip can vertically move on the hinge lug through the sliding strip (a yielding space which is favorable for the motion of the flange strip is preset on the hinge lug).
The second elastic element is preferably a coil spring; one end 11.1 of the spiral spring is inserted into a hole (a prefabricated hole) of the hinge lug and is welded and fixed (see figure 8), and the other end 11.2 of the spiral spring is inserted into a matching hole (a prefabricated hole) at the top of the slide bar and is welded and fixed; thereby having the potential to exert downward pressure on the slide.
Finally, it should be noted that the above-mentioned embodiments illustrate only specific embodiments of the invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (7)
1. An elastic buffer presser foot comprises a connector (1) fixedly connected with the bottom end of a press rod and a press plate (8) which is hinged with the connector through two hinge lugs (5) on the upper part of the elastic buffer presser foot and provided with a needle hole (8.11); the method is characterized in that: a movable plate (6) which can move in the vertical direction and at least one first elastic element (12) which is positioned in the pressure plate and applies downward pressure to the movable plate are also positioned on the pressure plate; a rectangular groove (8.1) is formed in the center of the pressing plate, extends forwards and backwards and penetrates through the pressing plate in the vertical direction; the movable plate can be movably embedded into the rectangular groove up and down, and the bottom end plane of the movable plate is flush with the bottom surface of the pressing plate and has a moving space in the vertical upward direction; the rear end edge of the moving plate and the rear side edge of the rectangular groove are combined to form the pinhole.
2. The resilient cushion presser foot of claim 1, wherein: a cavity which is communicated back and forth and up and down to facilitate the hinging with the connector is arranged between the two hinging lugs of the pressing plate; the cavity is also correspondingly arranged and communicated with the rectangular groove, and the elastic element is arranged in the cavity and respectively applies vertical jacking force to the connector and the movable piece.
3. The resilient cushion presser foot of claim 2, wherein: the bottom end surface of the connector and the upper surface of the movable plate are respectively provided with a salient point (6.3) matched with the elastic element.
4. The resilient cushion presser foot of claim 3, wherein: a barrier strip (8.2) transversely arranged at the edge of the rear side of the rectangular groove is manufactured at the rear side of the pressing plate, the rear end of the moving plate extends upwards for a plurality of distances to enter the cavity, then extends backwards by clinging to the upper edge of the barrier strip, and is fixedly connected with a transversely arranged rear barrier strip (6.2) after passing through the cavity; the front end part of the moving plate penetrates through the rectangular groove upwards and then is fixedly connected with a front barrier strip (6.1) transversely arranged on the front side of the hinge lug; the length of the front barrier strip and the length of the rear barrier strip are both larger than the width of the rectangular groove so as to limit the displacement of the movable plate in the front-back direction and the left-right direction.
5. The resilient cushion presser foot of claim 4, wherein: the outer sides of the hinging lugs at the left side and the right side of the pressing plate are respectively provided with a flange strip (7) capable of moving vertically and a second elastic element (11) which is positioned on the hinging lugs and applies downward pressure to the flange strip; the bottom end of the edge blocking strip is 1-2mm lower than the bottom end of the pressing plate.
6. The resilient cushion presser foot of claim 5, wherein: the edge blocking strips vertically move on the hinge lugs through the guide rail pairs; the guide rail pair comprises a sliding groove (5.2) which is vertically manufactured on the outer side of the hinge lug, a cover plate (3) which blocks the outer part of the sliding groove and is fixed with the hinge lug, and a sliding strip (2) which is vertically arranged on the edge blocking strip and can be embedded into the sliding groove in a sliding mode.
7. The resilient cushion presser foot of claim 6, wherein: the first elastic element and the second elastic element are both helical springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238955.9U CN209873300U (en) | 2019-02-26 | 2019-02-26 | Elastic buffering presser foot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238955.9U CN209873300U (en) | 2019-02-26 | 2019-02-26 | Elastic buffering presser foot |
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| Publication Number | Publication Date |
|---|---|
| CN209873300U true CN209873300U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920238955.9U Active CN209873300U (en) | 2019-02-26 | 2019-02-26 | Elastic buffering presser foot |
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| CN (1) | CN209873300U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706634A (en) * | 2019-02-26 | 2019-05-03 | 达利(中国)有限公司 | A kind of elastic buffer presser feet |
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2019
- 2019-02-26 CN CN201920238955.9U patent/CN209873300U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706634A (en) * | 2019-02-26 | 2019-05-03 | 达利(中国)有限公司 | A kind of elastic buffer presser feet |
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