Thread bonding device of sewing equipment and flat seaming machine
By designing adapter seats and connection holes in the threading device of the sewing equipment to form low secondary contact, the abnormal noise and wear problems caused by collision between the threading poles and the through holes is solved, and a more stable and silent threading process is achieved.
Patent Information
- Application Number
- CN202421572463.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the high-speed loosening process of existing sewing equipment, the thread pole collides with the edge of the through hole, causing abnormal noise and wear, affecting the user experience and causing unstable thread cutting.
A wire-making device including a wire-passing frame, an adapter seat and a wire-punching pole is designed. Through the rotating installation of the adapter seat and the design of the connection hole, a low secondary contact is formed between the wire-punching pole and the connection hole, avoiding wear and noise caused by high secondary contact.
It effectively reduces the noise of threading, reduces the wear of threading poles, improves the stability of thread cutting, extends the service life, and improves the user experience.
Smart Images
Figure CN222809703U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of sewing equipment, and in particular to a thread-binding device and a flat sewing machine of sewing equipment. Background Art
[0002] In current sewing equipment, for example, when cutting the thread in a flat sewing machine, the moving knife first moves out to hook the thread, and then the moving knife returns to engage with the fixed knife to complete the cutting. If the suture is too tight during the process of the moving knife hooking the thread and returning the knife, it may cause the thread to be cut directly. Because there is not enough return distance, the thread end left after cutting the thread will be too short, and it is very easy to get off the thread when the next stitch is sewn. Therefore, all flat sewing machines are equipped with a thread-punching device. When the thread is cut and the knife is released, the suture is loosened to ensure that the suture is in a relaxed state when the moving knife returns to hook the thread, so as to retain a long enough thread end to prevent the thread from getting off the thread when the next stitch is sewn.
[0003] The existing wire passing rack is provided with a through hole, and the top of the wire rod moves through the through hole. During the high-speed wire loosening process, the wire rod will collide with the edge of the through hole, causing abnormal noise, which seriously affects the user experience. In addition, it also increases the wear of the wire rod, resulting in jamming of movement and other conditions, and unstable wire cutting. Utility Model Content
[0004] In view of the deficiencies in the prior art, the present application provides a thread-binding device that can reduce thread-binding noise and improve thread cutting stability, and can be applied to sewing equipment such as interlock sewing machines.
[0005] The thread-binding device of the sewing equipment provided in the present application comprises:
[0006] Thread guide, used for threading sutures;
[0007] An adapter seat is rotatably mounted on the wire-passing frame, and a connecting hole is provided on the adapter seat;
[0008] A thread-binding rod is slidably arranged in the connecting hole, and a thread-binding hook for acting on the suture is arranged on the thread-binding rod;
[0009] The driving handle has one end for connecting with the power mechanism and the other end as the working end for transmission cooperation with the wire driving rod.
[0010] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.
[0011] Optionally, the wire passing rack is provided with a mounting hole, and the adapter seat is rotatably inserted into the mounting hole.
[0012] Optionally, a pivot is provided on the wire passing frame, and the adapter seat is rotatably sleeved on the pivot.
[0013] Optionally, the tie rod has a relative initial position and a working position during tie-breaking, and the extension direction of the tie rod is obliquely intersected at the initial position and the working position, and a movement plane is determined;
[0014] The rotation axis of the adapter seat is perpendicular to the movement plane.
[0015] Optionally, the wire-beating rod is in low-pair contact with the inner circumference of the connecting hole.
[0016] Optionally, an extension length of the connecting hole along its own axial direction is greater than or equal to a diameter of the wire-beating rod.
[0017] Optionally, at least a portion of the adapter seat is cylindrical and the portion itself serves as a pivot and passes through the mounting hole.
[0018] Optionally, the adapter seat is provided with limit members on both sides of the mounting hole, and acts on two opposite sides of the wire passing rack.
[0019] Optionally, the adapter seat is columnar as a whole, and the connecting hole penetrates along the radial direction of the adapter seat.
[0020] Optionally, the top of the wire-beating rod slides through the connecting hole; a transmission head is rotatably mounted on the working end of the driving handle, and the middle part of the wire-beating rod is fixedly connected to the transmission head.
[0021] The present application also provides a flat sewing machine, comprising a housing and a thread-binding device installed on the housing and described in the present application.
[0022] The thread-tying device of the sewing equipment of the present application improves the connection method of the thread-tying rod, which not only reduces operating noise and improves user experience, but also solves the problem of easy wear of the thread-tying rod, extends its service life, and avoids thread cutting stability problems caused by jamming of the thread-tying rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 It is a structural schematic diagram of a flat sewing machine (housing part) and a thread-punching device in the prior art;
[0025] Figure 2 for Figure 1 Enlarged view of part A;
[0026] Figure 3 for Figure 1 Enlarged view of part B;
[0027] Figure 4 It is a structural schematic diagram of a flat sewing machine (housing part) and a thread-binding device in one embodiment of the present application;
[0028] Figure 5 for Figure 4 The structural diagram of the middle wire bonding device;
[0029] Figure 6 for Figure 5 A schematic diagram of the structure of the middle wire bonding device from another angle;
[0030] Figure 7 for Figure 5 Enlarged view of part C in the middle;
[0031] Figure 8 for Figure 7 Schematic diagram of the center hitting rod in different positions.
[0032] The reference numerals of the components are as follows:
[0033] 100, housing;
[0034] 110, crimping wheel;
[0035] 120, wire rack; 121, wire hole; 122, through hole; 123, inner edge; 124, ear piece;
[0036] 130, wire rod; 131, transmission head; 132, hook seat; 133, wire hook;
[0037] 140, driving handle; 141, transmission hole; 142, working end; 143, return spring;
[0038] 150. Adapter seat; 151. Limiting member; 152. Connecting hole. DETAILED DESCRIPTION
[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0040] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.
[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0042] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0043] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.
[0044] like Figure 1 to Figure 3 As shown, in the existing interlock sewing machine (only the casing and partial structure of the thread-punching device are illustrated), a thread pressing wheel 110 and a thread passing rack 120 are provided outside the casing 100, the thread passing rack 120 has a thread hole 121, a part of the suture is passed between the thread pressing wheel 110 and the thread hole 121, a thread punching rod 130 is movably passed through the thread passing rack 120, the thread punching rod 130 is fixedly connected to a transmission head 131, and the transmission head 131 is hinged to a driving handle 140 (for example, a thread loosening crank can be used), and the driving handle 140 is hinged to the casing 100 and connected to the driving mechanism.
[0045] A through hole 122 is provided on the thread passing rack 120, and the top of the thread hitting rod 130 passes through the through hole 122. During operation, the driving mechanism drives the driving handle 140 to rotate counterclockwise, and the driving handle 140 drives the thread hitting rod 130 to move downward through the transmission head 131, and further drives the thread hitting hook 133 to move downward and act on the suture to complete the thread hitting function.
[0046] With regard to the unstable wire cutting problems in the prior art, it has been found through research that this is mainly because in order to ensure that the wire-cutting rod 130 can smoothly cut the wire, the gap between the through hole 122 and the wire-cutting rod 130 is relatively large to accommodate the small swing of the wire-cutting rod 130 (otherwise it is easy to get stuck). During the high-speed wire loosening process, the wire-cutting rod 130 will be in high-pair contact with the inner edge 123 of the through hole 122. In actual use, there is often wear and tear, which may increase the abnormal noise. On the other hand, the wire-cutting rod 130 is prone to rust after wear, which may cause the gap to become smaller, causing the wire-cutting rod 130 to get stuck, and ultimately leading to unstable wire cutting.
[0047] See also Figures 4 to 8 Based on the above problems, a thread-tying device for a sewing device is provided in one embodiment of the present application. The sewing device hereinafter takes a flat sewing machine as an example. The figure mainly illustrates the casing 100 and the relevant parts of the thread-tying device. The remaining structures can be implemented with reference to or in combination with the prior art, and are not the focus of improvement of the present application.
[0048] The thread punching device of this embodiment includes a thread passing rack 120, which is fixedly installed on the casing 100 of the interlock sewing machine. A plurality of thread pressing wheels 110 and thread holes 121 corresponding to each thread pressing wheel 110 are arranged on the thread passing rack 120. The suture passes through the corresponding thread hole 121 after winding around the thread pressing wheel 110. During the movement of the suture, the portion between the thread pressing wheel 110 and the corresponding thread hole 121 is the portion that is touched during thread punching.
[0049] An adapter seat 150 is rotatably mounted on the thread passing rack 120, and a connecting hole 152 is opened on the adapter seat 150. The top of the thread hitting rod 130 slides through the connecting hole 152. A plurality of hook seats 132 are fixedly arranged on the thread hitting rod 130, and each hook seat 132 is respectively fixed with a thread hitting hook 133. Each thread hitting hook is arranged between the thread pressing wheel 110 and the corresponding thread hole 121, and can touch the corresponding part of the suture during operation.
[0050] One end of the driving handle 140 is used for transmission connection to the power mechanism, for example, the end is provided with a transmission hole 141 to connect the driving shaft extending from the inside of the housing 100, and the other end of the driving handle 140 is a working end 142 and is transmission-coordinated with the wire rod 130. A return spring 143 is provided between the driving handle 140 and the housing 100 or the wire frame 120 to maintain the preset initial position of the driving handle 140.
[0051] In this embodiment, in order to adapt to the movement of the wire-beating rod 130 and avoid collision and scratching with the wire-passing frame 120, a rotatable adapter seat 150 is provided on the wire-passing frame 120. When the wire-beating rod 130 swings relative to the wire-passing frame 120, the swinging torque can be released by rotating the adapter seat 150. Moreover, the gap between the connecting hole 152 of the adapter seat 150 and the wire-beating rod 130 is small, and a low-pair contact can be formed between the wire-beating rod 130 and the inner circumference of the connecting hole 152, which can solve the noise and wear problems caused by high-pair contact.
[0052] Preferably, the extending length of the connecting hole 152 along its own axial direction is greater than or equal to the diameter of the wire rod 130. The necessary length of the connecting hole 152 is beneficial to suppressing the relative shaking of the wire rod 130 and increasing the tolerance for processing accuracy.
[0053] The top of the wire-breaking rod 130 slides through the connecting hole 152, and the driving handle 140 is transmission-connected to the middle part of the wire-breaking rod 130. The specific connection method is that the working end 142 of the driving handle 140 is rotatably installed with a transmission head 131. The transmission head 131 is columnar as a whole, a part of which passes through the driving handle 140 and axial limiting retaining rings can be set on both sides of the passing part. The wire-breaking rod 130 is fixedly connected to the transmission head 131. When the wire-breaking rod 130 moves, it is allowed to change the angle with the driving handle 140 through the transmission head 131.
[0054] To facilitate processing and take into account structural strength, the top of the wire passing frame 120 has an integrally bent ear piece 124, the ear piece 124 has a mounting hole, and the adapter seat 150 is rotatably inserted into the mounting hole. In other embodiments, a pivot may be provided on the ear piece 124 or other parts of the wire passing frame 120, and the adapter seat 150 is rotatably mounted on the pivot.
[0055] Taking the ear piece 124 as an example, at least a portion of the adapter seat 150 is cylindrical and the portion itself serves as a pivot to pass through the mounting hole. The adapter seat 150 is provided with limit members 151 on both sides of the mounting hole, and acts on the two opposite sides of the ear piece 124. The limit members 151 can be provided with a retaining ring or the like to facilitate disassembly and assembly, so as to prevent the adapter seat 150 from falling out of the mounting hole.
[0056] For the convenience of processing, the adapter seat 150 can also be columnar as a whole, and the connecting hole 152 penetrates along the radial direction of the adapter seat 150, so that the movement of the wire rod 130 can be smoother.
[0057] The rotation axis X of the adapter 150 is perpendicular to the length direction of the wire rod 130 (ie, the axis of the wire rod 130). Figure 8 In the illustrated movement of the tripping rod 130, the tripping rod 130 has a relative initial position during the movement (eg Figure 8The wire rod shown in the solid line) and the working position when wire is being wired (for example Figure 8 The two relative positions of the hitting rod shown by the dotted line can also be understood as the initial position and the extreme position of movement when hitting the wire.
[0058] The extension direction of the driving rod 130 is oblique in the initial position and the working position, and roughly intersects with the rotation axis X of the adapter 150, and the two oblique lines determine a motion plane, and the rotation axis X of the adapter 150 is perpendicular to the motion plane.
[0059] The present application also provides a flat sewing machine as a sewing device, including a housing and the thread-binding device of the above embodiments.
[0060] When the interlock sewing machine of this embodiment is in operation, after receiving the thread cutting command, the power mechanism drives the driving handle 140 to rotate counterclockwise, that is, drives the thread tie rod 130 to move downward, and at the same time limits the position through the adapter seat 150 to complete the thread tie action. This application optimizes the existing thread tie structure, solves the problems of its loud sound and easy wear, improves the user experience, and at the same time prolongs the service life of the thread tie mechanism and improves the thread cutting stability.
[0061] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.
[0062] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.
Claims
1. A thread-binding device for a sewing device, characterized in that: include: Thread guide, used for threading sutures; An adapter seat is rotatably mounted on the wire-passing frame, and a connecting hole is provided on the adapter seat; A thread-binding rod is slidably arranged in the connecting hole, and a thread-binding hook for acting on the suture is arranged on the thread-binding rod; The driving handle has one end for connecting with the power mechanism and the other end as the working end for transmission cooperation with the wire driving rod.
2. The thread-binding device of the sewing equipment according to claim 1, characterized in that: The wire passing frame is provided with a mounting hole, and the adapter seat is rotatably inserted in the mounting hole.
3. The thread-binding device of the sewing equipment according to claim 1, characterized in that: The wire passing frame is provided with a pivot, and the adapter seat is rotatably sleeved on the pivot.
4. The thread-binding device of the sewing equipment according to claim 1, characterized in that: The wire-breaking rod has a relative initial position and a working position during wire-breaking. The extension direction of the wire-breaking rod is obliquely intersected at the initial position and the working position and determines a movement plane. The rotation axis of the adapter seat is perpendicular to the movement plane.
5. The thread-binding device of the sewing equipment according to claim 1, characterized in that: The wire-beating rod is in low-pair contact with the inner circumferential surface of the connecting hole.
6. The thread-binding device of the sewing equipment according to claim 1, characterized in that: The extending length of the connecting hole along its own axial direction is greater than or equal to the diameter of the wire-beating rod.
7. The thread-binding device of the sewing equipment according to claim 2, characterized in that: At least a portion of the adapter seat is cylindrical and the portion itself passes through the mounting hole as a pivot; The adapter seat is provided with limiting pieces on both sides of the mounting hole, and acts on two opposite sides of the wire passing frame.
8. The thread-binding device of the sewing equipment according to claim 7, characterized in that: The adapter seat is generally columnar, and the connecting hole penetrates along the radial direction of the adapter seat.
9. The thread-binding device of the sewing equipment according to claim 1, characterized in that: The top of the wire-beating rod slides through the connecting hole; a transmission head is rotatably mounted on the working end of the driving handle, and the middle part of the wire-beating rod is fixedly connected to the transmission head.
10. A flat sewing machine, comprising a casing and a thread-stitching device mounted on the casing, characterized in that: The thread-tying device is the thread-tying device of the sewing equipment according to any one of claims 1 to 9.