Electromagnet thread trimming and loosening mechanism of flat seaming machine and flat seaming machine
By using an electromagnet thread cutting and loosening mechanism in a coverstitch machine, the tension of the bobbin thread is controlled by an electromagnet assembly, which solves the problem of unstable bobbin thread in existing coverstitch machine thread cutting and loosening structures, and achieves stable thread cutting and clamping effects.
Patent Information
- Application Number
- CN202520005378.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-02
AI Technical Summary
The existing thread loosening structure of the covert sewing machine has an excessive or insufficient amount of loose thread on the bobbin when cutting non-elastic thread, which causes the thread track to be unstable and the bobbin to easily come off the moving blade, making it impossible to cut stably.
The coverlock sewing machine employs an electromagnet thread cutting and loosening mechanism. The tension of the bobbin thread is controlled by an electromagnet assembly. The energization and demagnetization of the electromagnet are used to control the thread release and take-up of the bobbin thread, ensuring that the bobbin thread maintains appropriate tension during the thread cutting process.
It achieves stable clamping and cutting of the bottom thread during the thread cutting process, preventing the bottom thread from coming out and ensuring the stability and reliability of the thread cutting.
Smart Images
Figure CN223592999U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of binding machine, concretely relates to a binding machine electromagnet thread cutting and loosening mechanism and binding machine. BACKGROUND
[0002] The binding machine is a kind of sewing equipment, mainly used for the sewing of clothing, home textile, hat and other textiles. Figure 1 And Figure 2 As shown in the drawings, the thread cutting and loosening structure in the existing binding machine is the thread loosening piece thread loosening structure 12 fixedly connected with the moving knife 2, and the thread loosening piece thread loosening structure 12 has a big defect, specifically, when cutting the inelastic thread, the thread loosening amount is far greater than the thread required amount in the process of the moving knife 2 hooking the bottom thread 9 and resetting, which leads to the bottom thread 9 without tension and unstable thread track, and further leads to the bottom thread 9 from the blade of the moving knife 2, thereby leading to the cutting of the bottom thread 9, wherein Figure 1 represents the moving knife cutting state, Figure 2 represents the moving knife hooking thread reset state, Figure 2 In the above-mentioned process, the bottom thread 9 is cut off from the blade of the moving knife 2 due to the lack of tension. UTILITY MODEL CONTENTS
[0003] In view of the defects of the prior art, the utility model provides a binding machine electromagnet thread cutting and loosening mechanism and binding machine, which can avoid the cutting of the bottom thread due to the excessive tension of the bottom thread after cutting the thread or the cutting of the bottom thread due to the small tension of the bottom thread.
[0004] The utility model adopts the technical scheme that
[0005] A binding machine electromagnet thread cutting and loosening mechanism, which comprises a machine shell, a curved needle, a moving knife, a thread clamping piece, a fixed knife, a thread cutting knife disc, a thread loosening and passing assembly, a thread loosening rod and an electromagnet assembly, the thread cutting knife disc and the thread loosening and passing assembly are fixedly connected with the machine shell, the moving knife, the thread clamping piece and the fixed knife are arranged on the thread cutting knife disc, the electromagnet assembly comprises an iron core with a coil wound on the outer side and fixedly connected with the machine shell, an armature above the iron core and a reset member for resetting the armature, the thread loosening rod is fixedly connected with the upper end of the armature and vertically lifted and lowered by the armature, the bottom thread of the binding machine passes through the thread loosening and passing assembly, enters the lead-in channel of the curved needle from one end of the curved needle and leads out from the other end of the curved needle, the thread loosening rod vertically descends and cooperates with the thread loosening and passing assembly to thread the bottom thread, and the thread loosening rod vertically ascends and loosens the bottom thread.
[0006] Further, the thread loosening rod is horizontally arranged, the front end of the thread loosening rod is fixedly connected with the upper end of the armature, the thread loosening rod vertically descends and the rear end of the thread loosening rod cooperates with the thread loosening and passing assembly to thread the bottom thread.
[0007] Further, the thread loosening and passing assembly is provided with a left thread passing hole and a right thread passing hole, and the bottom thread of the flat seaming machine passes through the right thread passing hole and the left thread passing hole in sequence, and the rear end of the thread loosening rod is located above the bottom thread between the left thread passing hole and the right thread passing hole.
[0008] Further, the iron core and the armature are vertically arranged, the reset member is a reset spring sleeved outside the armature, the upper end of the reset spring is fixedly connected with the armature, and the lower end of the reset spring is fixedly connected with the upper end of the iron core.
[0009] Further, the iron core is fixedly connected with the shell through a support, and the lower end of the reset spring is fixedly connected with the upper end of the support.
[0010] Further, the thread passing assembly is further fixed to the shell, the thread passing assembly is provided with a thread passing hole, the bottom thread of the flat seaming machine passes through the right thread passing hole, the left thread passing hole and the thread passing hole in sequence, and enters the lead channel of the curved needle from the traction opening of one end of the curved needle and is discharged from the thread discharging opening of the other end of the curved needle.
[0011] The flat seaming machine comprises the thread cutting and thread loosening mechanism of the flat seaming machine electromagnet.
[0012] Compared with the prior art, the flat seaming machine has the following beneficial effects:
[0013] The utility model discloses a binding machine electromagnet thread cutting and loosening mechanism and binding machine, including casing, bent needle, moving knife, thread clamping piece, fixed knife, thread cutting cutter, thread loosening and passing assembly, thread loosening rod and electromagnet assembly, thread cutting cutter and thread loosening and passing assembly all are fixedly connected with casing, moving knife, thread clamping piece and fixed knife all are arranged on thread cutting cutter, electromagnet assembly includes the iron core that has been wound with the coil on the outside and is fixedly connected with casing, armature and reset member for making armature reset in the iron core top, thread loosening rod is fixedly connected with the upper end of armature and is driven vertical lifting by armature, the bottom thread of binding machine passes through thread loosening and passing assembly, and from the bent needle one end into the lead-in channel of bent needle and from the bent needle other end thread, thread loosening rod vertical drop and cooperate with thread loosening and passing assembly, and thread loosening rod vertical rise and loosen the bottom thread, so moving knife relatively fixed knife and thread clamping piece stretch out to the left in place after, and the bottom thread from the bent needle other end thread enters the cutting edge of moving knife, and the coil is electrified and makes the iron core magnetization, and the iron core after magnetization forms electromagnet and produces attractive force to armature, and thread loosening rod vertical drop with armature relatively iron core under the action of armature, and cooperate with thread loosening and passing assembly, and thread loosening rod vertical rise and reset under the action of reset member relatively iron core and loosen the bottom thread, so can ensure that the bottom thread keeps the state of tension before the cutting edge of moving knife approaches thread clamping piece, and moving knife can stably hook the bottom thread and cooperate with fixed knife and cut thread, and moving knife relatively fixed knife and thread clamping piece mesh after moving right to reset and cut the bottom thread, and moving knife and thread clamping piece clamp the remaining bottom thread after cutting thread, and thread loosening rod has completed loosening at this time, so the bottom thread is in the state of no tension during clamping, and moving knife, fixed knife and thread clamping piece reset right to moving thread cutting cutter simultaneously to avoid bent needle, and the bottom thread is in the state of no tension during this process, so moving knife and thread clamping piece can clamp the bottom thread and reset right to moving thread cutting cutter smoothly, and the situation that the bottom thread is separated from between moving knife and thread clamping piece due to the excessive tension of bottom thread does not appear, thereby guaranteeing the stability of clamping.
[0014] In summary, during the process of cutting thread, the coil of the electromagnet assembly is electrified or de-energized to control the tension of the bottom thread in each state during the process of cutting thread, so as to avoid the situation that the bottom thread cannot be clamped after cutting thread due to the excessive tension of the bottom thread or the bottom thread cannot be cut due to the insufficient tension of the bottom thread. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the moving knife out of the state diagram of the existing binding machine in the background art during the process of cutting thread;
[0016] Figure 2The schematic diagram of the hooking and returning state of the moving knife in the thread cutting process of the existing binding machine in the background art is shown in the figure;
[0017] Figure 3 The schematic diagram of the three-dimensional structure of the electromagnetic thread cutting and loosening mechanism of the binding machine in the utility model is shown in the figure;
[0018] Figure 4 The schematic diagram of the three-dimensional structure of the electromagnetic thread cutting and loosening mechanism of the binding machine in the utility model is shown in the figure; Figure 3 The schematic diagram of the three-dimensional structure of the electromagnetic thread cutting and loosening mechanism of the binding machine in the utility model is shown in the figure;
[0019] Figure 5 The schematic diagram of the three-dimensional structure of the electromagnetic thread cutting and loosening mechanism of the binding machine in the utility model is shown in the figure;
[0020] Figure 6 The schematic diagram of the three-dimensional structure of the electromagnetic thread cutting and loosening mechanism of the binding machine in the utility model is shown in the figure;
[0021] Figure 7 The schematic diagram of the three-dimensional structure of the electromagnetic thread cutting and loosening mechanism of the binding machine in the utility model is shown in the figure;
[0022] Figure 8 The schematic diagram of the three-dimensional structure of the electromagnetic thread cutting and loosening mechanism of the binding machine in the utility model is shown in the figure.
[0023] The reference signs in the figure are explained as follows: 1, curved needle, 101, lead passage, 2, moving knife, 3, thread clamping piece, 4, fixed knife, 5, thread passing assembly, 501, thread passing hole, 6, thread loosening and passing assembly, 601, left thread passing hole, 7, thread loosening rod, 801, iron core, 802, armature, 803, reset spring, 804, support, 9, bottom thread, 901, cut bottom thread, 10, thread cutting knife disc, 11, machine shell, 12, thread loosening piece thread loosening structure. DETAILED DESCRIPTION
[0024] The specific embodiments of the utility model will be further explained in detail in combination with the drawings. These embodiments are only used for explaining the utility model, and are not limited to the utility model.
[0025] In the description of the utility model, it is necessary to explain that, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0026] In the description of the utility model, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0027] As shown in Figure 3 and Figure 4 , an electromagnetic thread cutting and loosening mechanism of a flat seaming machine, comprising a machine shell 11, a curved needle 1, a moving knife 2, a thread clamping piece 3, a fixed knife 4, a thread cutting knife disc 10, a thread loosening and passing assembly 6, a thread loosening rod 7 and an electromagnet assembly; the thread cutting knife disc 10 and the thread loosening and passing assembly 6 are fixedly connected with the machine shell 11, the moving knife 2, the thread clamping piece 3 and the fixed knife 4 are arranged on the thread cutting knife disc 10; the electromagnet assembly comprises an iron core 801 wound with a coil on the outer side and fixedly connected with the machine shell 11, an armature 802 above the iron core 801 and a reset member for resetting the armature 802, the thread loosening rod 7 is fixedly connected with the upper end of the armature 802 and vertically lifted and lowered by the armature 802; as shown in Figure 5-8 , the bottom thread 9 of the flat seaming machine passes through the thread loosening and passing assembly 6, enters the lead-in channel 101 of the curved needle 1 from one end of the curved needle 1 and exits from the other end of the curved needle 1; the thread loosening rod 7 vertically descends and cooperates with the thread loosening and passing assembly 6 to cut the thread of the bottom thread 9, and the thread loosening rod 7 vertically ascends and loosens the thread of the bottom thread 9.
[0028] As shown in Figure 5 , after the moving knife 2 extends to the left relative to the fixed knife 4 and the thread clamping piece 3, the bottom thread 9 exiting from the other end of the curved needle 1 enters the blade gap of the moving knife 2, at the same time, the coil is electrified and the iron core 801 is magnetized, the magnetized iron core 801 forms an electromagnet and generates an attractive force on the armature 802, so that the thread loosening rod 7 vertically descends relative to the iron core 801 with the armature 802, and cooperates with the thread loosening and passing assembly 6 to cut the thread of the bottom thread 9, so that the bottom thread 9 remains in a tension state; as shown in Figure 6As shown, during the process of the moving knife 2 hooking the bottom thread 9 to move right to reset relative to the fixed knife 4 and the thread clamping piece 3, when the blade of the moving knife 2 approaches the thread clamping piece 3, the coil of the electromagnet assembly is powered off and the magnetized iron core 801 is demagnetized, the demagnetized iron core 801 no longer generates an attractive force on the armature 802, so that the slack thread rod 7 rises vertically along with the armature 802 under the action of the reset member to reset relative to the iron core 801 and slackens the bottom thread 9, so as to ensure that the bottom thread 9 remains in a tension state before the blade of the moving knife 2 approaches the thread clamping piece 3, and the moving knife 2 can stably hook the bottom thread 9 and cooperate with the fixed knife 4 to cut the thread; as shown, Figure 7 As shown, after the moving knife 2 moves right to reset relative to the fixed knife 4 and the thread clamping piece 3, the moving knife 2 meshes with the fixed knife 4 and cuts the bottom thread 9, and the moving knife 2 cooperates with the thread clamping piece 3 to clamp the remaining bottom thread 9 after cutting, at this time the slack thread rod 7 has completed the slackening, so the bottom thread 9 is in a state of no tension during clamping; as shown, Figure 8 As shown, the moving knife 2, the fixed knife 4 and the thread clamping piece 3 simultaneously move right to reset relative to the thread cutting disc 10 to avoid the curved needle 1, and in this process the bottom thread 9 is in a state of no tension, so that the moving knife 2 and the thread clamping piece 3 can clamp the bottom thread 9 and smoothly reset relative to the thread cutting disc 10, and the situation that the bottom thread 9 is pulled out from between the moving knife 2 and the thread clamping piece 3 due to excessive tension of the bottom thread 9 does not occur, thereby ensuring the stability of clamping.
[0029] In summary, during the thread cutting process, the coil of the electromagnet assembly is powered on or powered off to wind or unwind the bottom thread 9, so as to control the tension of the bottom thread 9 in each state during the thread cutting process, and avoid the situation that the bottom thread 9 cannot be clamped after cutting due to excessive tension of the bottom thread 9 or the bottom thread 9 cannot be cut due to insufficient tension of the bottom thread 9.
[0030] In an embodiment, the slack thread rod 7 is horizontally arranged, the front end of the slack thread rod 7 is fixedly connected with the upper end of the armature 802, the slack thread rod 7 vertically descends, and the rear end of the slack thread rod 7 cooperates with the slack thread passing assembly 6 to beat the bottom thread 9.
[0031] Preferably, the slack thread passing assembly 6 is provided with a left thread passing hole 601 and a right thread passing hole 501, the bottom thread 9 of the stitcher passes through the right thread passing hole 501 and the left thread passing hole 601 in sequence, and the rear end of the slack thread rod 7 is located above the bottom thread 9 between the left thread passing hole 601 and the right thread passing hole 501.
[0032] In this way, when the slack thread rod 7 vertically descends, the slack thread rod 7 applies pressure to the bottom thread 9 between the left thread passing hole 601 and the right thread passing hole 501, and cooperates with the left thread passing hole 601 and the right thread passing hole 501 to beat the bottom thread 9, so that the bottom thread 9 remains in a tension state.
[0033] In one embodiment, the iron core 801 and the armature 802 are arranged vertically, and the reset member is a reset spring 803 sleeved outside the armature 802, the upper end of the reset spring 803 is fixedly connected with the armature 802, and the lower end is fixedly connected with the upper end of the iron core 801.
[0034] In this way, when the coil is powered, the iron core 801 is magnetized, the magnetized iron core 801 forms an electromagnet and generates an attractive force on the armature 802, the armature 802 vertically descends relative to the iron core 801 and compresses the reset spring 803, and when the coil is powered off, the magnetized iron core 801 is demagnetized, the demagnetized iron core 801 no longer generates an attractive force on the armature 802, and the reset spring 803 in the compressed state is stretched and makes the armature 802 vertically ascend relative to the iron core 801 and reset.
[0035] Preferably, the iron core 801 is fixedly connected with the shell 11 through a support 804, and the lower end of the reset spring 803 is fixedly connected with the upper end of the support 804.
[0036] In one embodiment, the thread cutting and loosening mechanism of the flat seaming machine electromagnet further comprises a thread passing assembly 5 fixed to the shell 11, the thread passing assembly 5 is provided with a thread passing hole 501, the bottom thread 9 of the flat seaming machine passes through the right thread passing hole 501, the left thread passing hole 601 and the thread passing hole 501 in sequence, and enters the lead-in channel 101 of the curved needle 1 from the traction port of one end of the curved needle 1 and exits from the thread exit port of the other end of the curved needle 1.
[0037] A flat seaming machine comprising the thread cutting and loosening mechanism of the flat seaming machine electromagnet.
[0038] An electromagnet thread cutting and loosening method, which adopts the thread cutting and loosening mechanism of the flat seaming machine electromagnet to cut and loosen the thread, comprising the following steps:
[0039] S1, the movable cutter 2, the fixed cutter 4 and the thread clamping piece 3 simultaneously extend to a certain distance to the left relative to the thread cutting disc 10, then the movable cutter 2 continues to extend to the left relative to the fixed cutter 4 and the thread clamping piece 3, the bottom thread 9 exiting from the other end of the curved needle 1 enters the cutting edge of the movable cutter 2 after the movable cutter 2 extends to the left to the position, at the same time, the coil is powered and the iron core 801 is magnetized, the magnetized iron core 801 forms an electromagnet and generates an attractive force on the armature 802, so that the thread loosening rod 7 descends vertically relative to the iron core 801 with the armature 802, and cooperates with the thread loosening and passing assembly 6 to strike the thread on the bottom thread 9, so that the bottom thread 9 remains in a tension state;
[0040] S2, the process of the hooking bottom line 9 relative to the fixed knife 4 and the clamping piece 3 to the right to reset, when the blade of the moving knife 2 approaches the clamping piece 3, the coil is powered off and the magnetized iron core 801 is demagnetized, the demagnetized iron core 801 no longer generates the attraction force to the armature 802, so that the loose line rod 7 rises vertically along with the armature 802 under the action of the reset member and resets relative to the iron core 801, and the bottom line 9 is loosened, so that the bottom line 9 can keep the tension state before the blade of the moving knife 2 approaches the clamping piece 3, and the moving knife 2 can stably hook the bottom line 9 and cooperate with the fixed knife 4 to cut the line;
[0041] S3, the moving knife 2 is reset relative to the fixed knife 4 and the clamping piece 3 and meshes with the fixed knife 4 to cut the bottom line 9, and the moving knife 2 cooperates with the clamping piece 3 to clamp the remaining bottom line 9 after cutting, at this time the loose line rod 7 has completed the loosening, so that the bottom line 9 is in a state of no tension during clamping;
[0042] S4, the moving knife 2, the fixed knife 4 and the clamping piece 3 are simultaneously reset relative to the cutting knife disc 10 to the right to avoid the bending needle 1, and the bottom line 9 is in a state of no tension during the process, so that the moving knife 2 and the clamping piece 3 can clamp the bottom line 9 and reset relative to the cutting knife disc 10 smoothly, and the situation that the bottom line 9 is pulled out from between the moving knife 2 and the clamping piece 3 due to the excessive tension of the bottom line 9 does not occur, so as to ensure the stability of the clamping.
[0043] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and replacements can be made without departing from the technical principles of the utility model, and these improvements and replacements should also be regarded as the protection range of the utility model.
Claims
1. An electromagnetic thread trimming and loosening mechanism for a flat seaming machine, characterized by: The stretch machine comprises a casing (11), a curved needle (1), a moving blade (2), a thread clamping piece (3), a fixed blade (4), a thread cutting disc (10), a thread loosening and passing assembly (6), a thread loosening rod (7) and an electromagnet assembly; the thread cutting disc (10) and the thread loosening and passing assembly (6) are fixedly connected with the casing (11), the moving blade (2), the thread clamping piece (3) and the fixed blade (4) are arranged on the thread cutting disc (10); the electromagnet assembly comprises an iron core (801) with a coil wound outside and fixedly connected with the casing (11), an armature (802) above the iron core (801) and a reset member for resetting the armature (802), the thread loosening rod (7) is fixedly connected with the upper end of the armature (802) and vertically lifted and lowered by the armature (802); the bottom thread (9) of the stretch machine passes through the thread loosening and passing assembly (6) and enters the lead-in channel (101) of the curved needle (1) from one end of the curved needle (1) and is led out from the other end of the curved needle (1); the thread loosening rod (7) vertically descends and cooperates with the thread loosening and passing assembly (6) to strike the bottom thread (9), and the thread loosening rod (7) vertically ascends to loosen the bottom thread (9).
2. The electromagnetic thread trimming and loosening mechanism of a flat seaming machine according to claim 1, characterized in that: The thread loosening rod (7) is horizontally arranged, the front end of the thread loosening rod (7) is fixedly connected with the upper end of the armature (802), the thread loosening rod (7) vertically descends and the rear end of the thread loosening rod (7) cooperates with the thread loosening and passing assembly (6) to strike the bottom thread (9).
3. The electromagnetic thread trimming and loosening mechanism of a flat seaming machine according to claim 2, characterized in that: The thread loosening and passing assembly (6) is provided with a left thread passing hole (601) and a right thread passing hole (501), the bottom thread (9) of the stretch machine passes through the right thread passing hole (501) and the left thread passing hole (601) in sequence, and the rear end of the thread loosening rod (7) is located above the bottom thread (9) between the left thread passing hole (601) and the right thread passing hole (501).
4. The electromagnetic thread trimming and loosening mechanism of a flat seaming machine according to claim 1, characterized in that: The iron core (801) and the armature (802) are vertically arranged, the reset member is a reset spring (803) sleeved outside the armature (802), the upper end of the reset spring (803) is fixedly connected with the armature (802) and the lower end is fixedly connected with the upper end of the iron core (801).
5. A thread trimming and loosening mechanism for an electromagnetic thread trimmer of a flat seaming machine according to claim 4, wherein: The iron core (801) is fixedly connected with the casing (11) through a support (804), and the lower end of the reset spring (803) is fixedly connected with the upper end of the support (804).
6. The electromagnetic thread trimming and loosening mechanism of a flat seaming machine according to claim 3, wherein: The stretch machine further comprises a thread passing assembly (5) fixed on the casing (11), the thread passing assembly (5) is provided with a thread passing hole (501), the bottom thread (9) of the stretch machine passes through the right thread passing hole (501), the left thread passing hole (601) and the thread passing hole (501) in sequence and enters the lead-in channel (101) of the curved needle (1) from the traction opening of one end of the curved needle (1) and is led out from the thread leading-out opening of the other end of the curved needle (1).
7. A flat seaming machine characterized by: The stretch machine electromagnet thread cutting and loosening mechanism comprises the stretch machine electromagnet thread cutting and loosening mechanism according to any one of claims 1-6.