Presser foot mechanism for a sewing apparatus

Abstract

The present application relates to a kind of presser foot mechanism of sewing equipment, including workbench, sleeve, connecting rod, elastic member, transmission rod and shaft sleeve, shaft sleeve is located in the cavity, and sleeve is set in the periphery of the connecting rod, the inner wall of this shaft sleeve is opened with the guiding groove of the length direction of the connecting rod extends and with the guiding piece guiding cooperation, the outer wall of this shaft sleeve is opened with the sliding groove of the sliding piece sliding cooperation and at least has local spiral downward extension, so that the transmission rod is in the state of up and down movement drives the shaft sleeve and connecting rod relative to the sleeve rotation in turn makes the presser piece bring cloth deflection.The whole process automatically realizes the rotation of cloth, without manual rotation cloth, avoid the security problem caused by manual operation.

Description

Technical Field

[0001] This invention belongs to the technical field of medical product manufacturing equipment, specifically relating to a presser foot mechanism for a sewing machine. Background Technology

[0002] Among medical supplies, there is a type of gauze used during surgery. This gauze is mainly used to stop bleeding, wipe away blood, and absorb blood or bodily fluids during surgery. In some surgeries, the wound is larger, and a relatively large amount of gauze is used. After the surgery, the gauze needs to be removed from the patient's body. After the gauze is soaked in blood, it becomes softer and its color matches the blood. There is a possibility of gauze being left inside the body during removal. Leaving the dressing inside the body not only affects the patient's recovery but also causes them pain, such as slow wound healing, pain, and infection. In severe cases, it may even endanger their life.

[0003] To address this issue, a type of gauze with an embedded chip has been proposed. This type of gauze facilitates monitoring of whether any gauze has been left in the surgical wound. The chip insertion process is as follows: the chip is placed inside a double-layered gauze. Typically, the gauze is open on at least three sides, therefore, each open side needs to be edged and sewn. During edge sewing, the fabric needs to be manually rotated to sew the edges of each open side. Currently, this is usually done manually, but manual operation is inefficient, increases labor costs, and poses significant safety risks. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a presser foot mechanism for a sewing device that can automatically deflect the fabric, in light of the current state of the prior art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problem is: a presser foot mechanism for a sewing machine, comprising a worktable, characterized in that it further comprises:

[0006] A sleeve, arranged vertically, has a cavity inside, and a through groove is provided on the side wall of the sleeve that communicates with the cavity and extends in the vertical direction.

[0007] A connecting rod is arranged vertically and located on the worktable. A portion of the connecting rod is located in the cavity of the sleeve, and a pressure member located below the sleeve is installed at the lower end of the connecting rod. A guide member is provided on the side wall of the connecting rod.

[0008] An elastic element acts on the connecting rod, causing the connecting rod to always have a downward tendency to cause the pressing element to press the fabric onto the workbench surface.

[0009] A transmission rod, at least partially located within the through groove and arranged to move vertically relative to the sleeve, has a sliding member fixed to its side wall, passing through the through groove; and

[0010] A bushing is disposed within the cavity and sleeved around the connecting rod. The inner peripheral wall of the bushing has a guide groove that extends along the length of the connecting rod and engages with the guide member. The outer peripheral wall of the bushing has a sliding groove that engages with the sliding member and extends downward in a spiral pattern in at least a part. Thus, when the transmission rod is in a vertical motion state, it drives the bushing and the connecting rod to rotate relative to the sleeve, thereby causing the pressure member to drive the fabric to deflect.

[0011] To achieve a 90-degree rotation of the connecting rod, the slide groove includes a first extension groove, a second extension groove, and a third extension groove connected sequentially from top to bottom. The first and third extension grooves extend vertically and are spaced apart circumferentially along the bushing. The second extension groove gradually extends downwards towards the third extension groove. When the connecting rod has rotated 90 degrees, the sliding member is located within either the first or second extension groove. Alternatively, the slide groove can be an integrally spiraled downward groove, so that the pressure member rotates 90 degrees as the sliding member moves from the beginning to the end of the groove.

[0012] There are various ways to form the upper and lower channels. The cavity can be divided into an upper channel and a lower channel from top to bottom by a horizontally arranged partition. The partition has a through hole for the connecting rod to pass through. Other forms can also be used, but preferably, the cavity includes an upper channel and a lower channel that are connected from top to bottom. The top periphery of the lower channel extends laterally to form a stepped part, which is the bottom wall of the upper channel. The bushing is located in the upper channel, and the through groove is formed on the side wall of the upper channel.

[0013] To guide the transmission rod, a fixing member is provided above the sleeve and fixed relative to the sleeve. The fixing member has a first channel communicating with the cavity and a second channel through which the transmission rod passes. Both the first and second channels extend vertically, with the upper end of the connecting rod and the elastic element located within the first channel. Alternatively, the second channel can be located within the sleeve without requiring a separate fixing member.

[0014] To better deflect the fabric, the fastener has two sets of sleeves, connecting rods, transmission rods and bushings, and the fastener has the first channel and the second channel at the position corresponding to each sleeve.

[0015] Preferably, a first roller located above the second channel is mounted on the upper end of the transmission rod.

[0016] To facilitate the positioning of the chip inside the gauze (fabric), the pressing member includes a pressing plate that gradually tilts forward from top to bottom, and the bottom surface of the pressing plate has an upwardly recessed groove near the front side to position the chip inside the fabric.

[0017] To automatically place the chip into the fabric, a drive mechanism for moving the connecting rod upward and a push mechanism for pushing the chip are also included. The power output end of the drive mechanism is connected to the connecting rod drive. The push mechanism is set on the worktable and has a push rod that can move back and forth. The chip is located in front of the push rod and on the movement path of the push rod. When the push rod is in the forward movement state, it can push the chip into the fabric through the rear opening of the folded fabric.

[0018] In order to better drive the connecting rod to move upward, a limiting component is installed on the connecting rod. The limiting component is located above the power output end of the drive mechanism and on the movement path of the power output end of the drive mechanism.

[0019] In order to feed the chip into the guide channel, the worktable is provided with a guide channel extending along the movement direction of the push rod. The side of the guide channel has a feeding channel for the chip to enter. The push rod can be located in the guide channel and move along the guide channel.

[0020] Compared with the prior art, the advantages of the present invention are as follows: When the transmission rod in the presser foot mechanism moves up and down, the sliding member on the transmission rod moves up and down along the through groove of the sleeve. After passing through the through groove, the sliding member slides and engages with the sliding groove on the bushing. Since the sliding groove extends downward in a partial spiral, it drives the bushing to rotate. The guide member of the connecting rod can only move along the guide groove on the inner circumferential wall of the bushing. At this time, the connecting rod rotates with the bushing, thus realizing the rotation of the presser. The presser can press the fabric onto the worktable. When the presser rotates, it will drive the fabric to rotate. The whole process automatically realizes the rotation of the fabric without the need for manual rotation of the fabric, thus avoiding the safety problems caused by manual operation. Attached Figure Description

[0021] Figure 1 This is a partial structural schematic diagram of the sewing equipment according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Partial structural diagram;

[0023] Figure 3 for Figure 1 Enlarged structural diagram of section I;

[0024] Figure 4 for Figure 1 A cross-sectional view of the presser foot mechanism in the middle;

[0025] Figure 5 for Figure 1 A cross-sectional view of the presser foot mechanism from another angle;

[0026] Figure 6 for Figure 4 A cross-sectional view of the presser foot mechanism after the intermediate pressure component has been rotated 90 degrees;

[0027] Figure 7 for Figure 4 A cross-sectional view of the presser foot mechanism from another angle after the intermediate pressure component has been rotated 90 degrees;

[0028] Figure 8 This is a cross-sectional view of the sewing equipment;

[0029] Figure 9 A cross-sectional view of the sewing equipment from another angle;

[0030] Figure 10 This is a schematic diagram of the bushing structure in this embodiment. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] like Figures 1 to 10 As shown, the presser foot mechanism of the sewing equipment in this embodiment is used to press and deflect the gauze containing the chip. The aforementioned presser foot mechanism includes a worktable 1, a sleeve 31, a connecting rod 32, an elastic element, a transmission rod 37, a bushing 38, a fixing element 39, a drive mechanism for driving the connecting rod 32 upward, and a push mechanism 35 for pushing the chip. The worktable 1 is provided with a guide channel 13 extending in the front-back direction. The side of the guide channel 13 has a feeding channel 16 for the chip to enter, and the feeding channel 16 is connected to the guide channel 13. To allow the chip to enter the feeding channel, a vibratory feeder 03 containing the chip is provided on the worktable 1. The outlet of the vibratory feeder 03 is connected to the feeding channel 16. The aforementioned vibratory feeder 03 adopts a structure from the prior art, which will not be described in detail in this embodiment. See the front-back direction for details. Figure 1 The direction indicated by the middle arrow.

[0033] like Figures 4 to 7 As shown, the aforementioned fixing member 39 is located above the sleeve 31 and is fixed relative to the sleeve 31. The aforementioned fixing member 39 corresponds to two sets of sleeves 31, connecting rods 32, transmission rods 37, and bushings 38. One set will be described below as an example. The sleeve 31 is arranged vertically and has an internal cavity 310. The fixing member 39 has a first channel 391 communicating with the cavity 310 and a second channel 392 through which the transmission rod 37 passes. Both the first channel 391 and the second channel 392 extend vertically.

[0034] like Figures 1 to 7 As shown, the connecting rod 32 is arranged vertically and located on the worktable 1. The upper end of the connecting rod 32 is located within the first channel 391, and a portion of the connecting rod 32 is located within the cavity 310 of the sleeve 31. Furthermore, a pressure member 36 is mounted on the lower end of the connecting rod 32, located below the sleeve 31. The pressure member 36 includes a pressure plate 361 that gradually slopes forward from top to bottom. The bottom surface of the pressure plate 361 has an upwardly recessed groove 3611 near the front side to position the chip within the fabric. Typically, the chip is located within a cylindrical tube 01, and the cross-section of the groove 3611 is semi-circular. A downwardly extending flexible member is provided within the groove 3611. When the chip is located within the groove 3611, the flexible member presses against the chip, preventing the chip from shifting within the fabric.

[0035] The elastic element acts on the connecting rod 32, causing the connecting rod 32 to always have a downward tendency, thereby causing the pressing element 36 to press the fabric onto the table surface 10 of the worktable 1. In this embodiment, as... Figures 4 to 7 As shown, the elastic element is a spring 34 located in the first channel 391. A cover plate 393 is provided at the top of the first channel 391 to block its top. The upper end of the spring 34 abuts against the cover plate 393, and the lower end of the spring 34 abuts against the upper part of the connecting rod 32.

[0036] Driven by the aforementioned drive mechanism, the connecting rod 32 moves upward, causing the chip to enter the gauze located below the pressure member. The power output end of the aforementioned drive mechanism is connected to the connecting rod 32. Specifically, a limit member is installed on the connecting rod 32, such as... Figure 3 As shown, the limiting component is the second roller 321, and the rotation axis of the second roller 321 is along the front-back direction. A mounting plate 12, fixed relative to the worktable 1, is provided on the worktable 1. The driving mechanism is a cylinder 33 mounted on the mounting plate 12, and a push plate 331, which pushes the second roller 321, is mounted on the power output end of the cylinder 33. The second roller 321 is located above the push plate 331 and on the movement path of the push plate 331.

[0037] like Figure 8 and Figure 9As shown, the pushing mechanism 35 is mounted on the worktable 1 and includes a push rod 351, a first motor 350, a driving gear 352, a driven gear 353, and a transmission belt 354. The push rod 351 can move in the forward-backward direction, and the aforementioned guide channel 13 extends along the direction of movement of the push rod 351. The push rod 351 can be located within the guide channel 13 and move along it. The chip is located in front of the push rod 351 and on its movement path. When the push rod 351 is in a forward-moving state, it can push the chip into the gauze through the rear opening of the gauze. In this embodiment, in order for the push rod 351 to move in the front-back direction, the output shaft of the first motor 350 extends in the left-right direction, the driving gear 352 is mounted on the output shaft of the first motor 350, the driven gear 353 is located in front of or behind the driving gear 352, the transmission belt 354 is wrapped around the periphery of the driving gear 352 and the driven gear 353 and moves under the drive of the driving gear 352 and the driven gear 353, and the push rod 351 is mounted on the rear part of the upper surface of the transmission belt 354 near the rear end.

[0038] To limit the vertical movement of the chip, such as Figure 4 and Figure 5 As shown, the worktable 1 is provided with an upper limit plate 14 and a lower limit plate 15, both of which are at least partially located in front of the guide channel 13 and extend along the movement direction of the push rod 351. The lower limit plate 15 is located below the upper limit plate 14, and a limiting space for the push rod 351 to pass through is formed between the lower limit plate 14 and the upper limit plate 14. The limiting space is connected to the guide channel 13. To facilitate the installation of the upper and lower limit plates, in this embodiment, a mounting member 17 is provided on the worktable 1, the guide channel 13 is opened on the mounting member 17, and both the upper limit plate 14 and the lower limit plate 15 are provided on the mounting member 17. Specifically, the upper limit plate 14 covers the front part of the guide channel 13, and the lower limit plate 15 is partially located below the guide channel 13.

[0039] like Figures 4 to 7 As shown, the cavity 310 includes an upper channel 3101 and a lower channel 3102 connected sequentially from top to bottom. A stepped portion 3103 extends laterally outward from the top periphery of the lower channel 3102, and the stepped portion 3103 serves as the bottom wall of the upper channel 3101. Furthermore, the sleeve 31 has a through groove 311 on its side wall corresponding to the upper channel 3101, communicating with the cavity 310 and extending vertically. A transmission rod 37 can be located within the through groove 311 and is arranged to move vertically relative to the sleeve 31. A sliding member 370, passing through the through groove 311, is fixed to the side wall of the transmission rod 37. A first roller 371, located above the second channel 392, is mounted on the upper end of the transmission rod 37.

[0040] like Figures 4 to 7As shown, a guide member 323 is provided on the side wall of the connecting rod 32. A bushing 38 is disposed within the upper channel 3101 of the cavity 310 and sleeved around the connecting rod 32. The inner peripheral wall of the bushing 38 has a guide groove 381 extending along the length of the connecting rod 32 and guidingly engaging with the guide member 323. The outer peripheral wall of the bushing 38 has a sliding groove 382 that slides with the sliding member 370, and the sliding groove 382 extends downwards at least partially spirally. In this embodiment, as... Figure 10 As shown, the slide groove 382 includes a first extension groove 3821, a second extension groove 3822, and a third extension groove 3823 connected sequentially from top to bottom. The first extension groove 3821 and the third extension groove 3823 extend vertically and are spaced apart along the circumference of the bushing 38. The second extension groove 3822 gradually extends downwards towards the third extension groove 3823, thus forming the spirally downward-extending portion of the slide groove 382. When the transmission rod 37 moves up and down, it drives the bushing 38 and connecting rod 32 to rotate relative to the sleeve 31, thereby causing the pressing member 36 to deflect the fabric. For example, when the transmission rod 37 moves upwards, it drives the pressing member to rotate 90 degrees counterclockwise through its cooperation with the sleeve and connecting rod. At this time, the sliding member 370 is located in the first extension groove 3821. When the transmission rod moves downwards, it drives the pressing member to rotate 90 degrees clockwise through its cooperation with the sleeve and connecting rod. At this time, the sliding member 370 is located in the second extension groove 3822. Thus, when the connecting rod 32 has rotated 90 degrees, the sliding member 370 is located in the first extension groove 3821 or the second extension groove 3822.

[0041] In the above embodiments, both the sliding member and the guide member are in the form of rollers.

[0042] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A presser foot mechanism of a sewing apparatus comprising a table (1), characterized in that, Also comprising: a sleeve (31) vertically arranged, the inside of the sleeve (31) having a containing cavity (310), and the side wall of the sleeve (31) being provided with a through groove (311) communicating with the containing cavity (310) and extending along the up-down direction; a connecting rod (32) vertically arranged and located above the workbench (1), the connecting rod (32) being partially located in the containing cavity (310) of the sleeve (31), and the lower end of the connecting rod (32) being provided with a pressing piece (36) located below the sleeve (31), and the side wall of the connecting rod (32) being provided with a guide piece (323); a resilient member acting on the connecting rod (32) and always making the connecting rod (32) have a downward movement and then making the pressing piece (36) press the cloth on the tabletop (10) of the workbench (1); a transmission rod (37) at least partially located in the through groove (311) and arranged to be movable up and down relative to the sleeve (31), and the side wall of the transmission rod (37) being provided with a sliding piece (370) penetrating through the through groove (311); and a shaft sleeve (38) located in the containing cavity (310) and sleeved on the periphery of the connecting rod (32), the inner circumferential wall of the shaft sleeve (38) being provided with a guide groove (381) extending along the length direction of the connecting rod (32) and guidingly matched with the guide piece (323), and the outer circumferential wall of the shaft sleeve (38) being provided with a sliding groove (382) slidably matched with the sliding piece (370) and at least partially extending helically downward, so that the shaft sleeve (38) and the connecting rod (32) are rotated relative to the sleeve (31) when the transmission rod (37) is in the up-down movement state, and then the pressing piece (36) drives the cloth to deflect.

2. The presser foot mechanism according to claim 1, characterized in that: The sliding groove (382) comprises a first extension groove (3821), a second extension groove (3822) and a third extension groove (3823) sequentially communicating from top to bottom, the first extension groove (3821) and the third extension groove (3823) both extend up and down and are arranged along the circumferential direction of the shaft sleeve (38), and the second extension groove (3822) extends obliquely from top to bottom towards the third extension groove (3823), and the sliding piece (370) is located in the first extension groove (3821) or the second extension groove (3822) when the connecting rod (32) is in the state of being rotated by 90 degrees.

3. The presser foot mechanism according to claim 2, characterized in that: The containing cavity (310) comprises an upper passage (3101) and a lower passage (3102) sequentially communicating from top to bottom, the top circumferential side of the lower passage (3102) is outwardly extended to form a step portion (3103), the step portion (3103) is the bottom wall of the upper passage (3101), the shaft sleeve (38) is located in the upper passage (3101), and the through groove (311) is provided on the side wall of the upper passage (3101).

4. The presser foot mechanism according to claim 1, characterized in that: The upper portion of the sleeve (31) is provided with a fixing member (39) fixed relative to the sleeve (31), the fixing member (39) is internally provided with a first channel (391) communicated with the accommodating cavity (310) and a second channel (392) for the transmission rod (37) to pass through, the first channel (391) and the second channel (392) extend upward and downward, and the upper end of the connecting rod (32) and the elastic member are located in the first channel (391).

5. The presser foot mechanism according to claim 4, characterized in that: The fixing member (39) corresponds to two sets of sleeve (31), connecting rod (32), transmission rod (37) and shaft sleeve (38), and the fixing member (39) has the first channel (391) and the second channel (392) at the position corresponding to each sleeve (31).

6. The presser foot mechanism according to claim 4, wherein: The upper end of the transmission rod (37) is provided with a first roller (371) located above the second channel (392).

7. The presser foot mechanism according to claim 1, wherein: The pressing member (36) comprises a pressing plate (361) gradually inclined forward from top to bottom, and the bottom surface of the pressing plate (361) is provided with a groove (3611) recessed upward to position the chip in the cloth at the position adjacent to the front side.

8. The presser foot mechanism according to any one of claims 1 to 7, characterized in that: Further comprising a driving mechanism for driving the connecting rod (32) to move upward and a pushing mechanism (35) for pushing the chip, the power output end of the driving mechanism is drivingly connected with the connecting rod (32), the pushing mechanism (35) is arranged on the workbench (1) and has a push rod (351) capable of moving forward and backward, the chip is located in front of the push rod (351) and on the movement path of the push rod (351), and when the push rod (351) is in the forward movement state, the chip can be pushed into the cloth through the rear opening of the folded cloth.

9. The presser foot mechanism according to claim 8, characterized in that: The connecting rod (32) is provided with a limiting member, the limiting member is located above the power output end of the driving mechanism and on the movement path of the power output end of the driving mechanism.

10. The presser foot mechanism according to claim 8, wherein: The workbench (1) is provided with a guide channel (13) extending along the movement direction of the push rod (351), the side portion of the guide channel (13) is provided with an inlet channel (16) for the chip to enter, and the push rod (351) can be located in the guide channel (13) and move along the guide channel (13).

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