Routing device with improved transmission structure and flat seaming machine
By improving the transmission structure in the threading device of the sewing equipment, and using the coordination of the guide seat and the guide hole, the threading pole moves in a linear manner, solving the noise and wear of the threading device when loosening the threading device at high speed, achieving a more stable thread cutting effect and a longer service life.
Patent Information
- Application Number
- CN202421565239.9
- 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 threading devices in existing sewing equipment, the threading pole collides with the edge of the through hole, resulting in increased noise and wear of the threading pole, affecting the user experience and causing unstable thread cutting.
The wire-drawing device of the transmission structure is improved. By setting a guide seat and a guide hole on the wire-drawing frame, the wire-drawing rod can be reciprocated in a linear manner with the cooperation of the guide seat, reducing collision with the wire-drawing frame, and achieving low contact between the wire-drawing rod and the guide hole through the hinged transmission method of the connecting rod and the transmission head.
Reduces the noise of wire drilling, reduces the wear of wire drilling poles, improves the stability of wire cutting, extends the service life of wire drilling mechanism, and improves user experience.
Smart Images
Figure CN222809702U_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 with an improved transmission structure. 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 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 present application provides an improved transmission structure for a thread-binding device for use in sewing equipment, the thread-binding device comprising:
[0006] Thread guide, used for threading sutures;
[0007] The guide seat comprises a first guide seat and a second guide seat which are arranged opposite to each other, and each guide seat is respectively fixed to the wire passing frame;
[0008] The two ends of the thread-beating rod are respectively slidably matched with the guide seats on the corresponding sides, and a transmission head and a thread-beating hook acting on the suture are fixed on the thread-beating rod;
[0009] A driving handle, one end of which is used to connect to the power mechanism and the other end is the working end;
[0010] The connecting rod is hingedly connected between the transmission head and the working end of the driving handle.
[0011] 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.
[0012] Optionally, the guide seat is provided with a guide hole, and the wire-beating rod is slidably inserted into the guide hole.
[0013] Optionally, the wire-beating rod performs linear reciprocating motion relative to the wire-passing rack, and the wire-beating rod is in low-pair contact with the inner circumference of the guide hole.
[0014] Optionally, the guide seat and the wire passing frame are an integrated structure.
[0015] Optionally, the guide seat is formed by a partial bend of the wire passing frame.
[0016] Optionally, each component in the bonding device has an initial position and a relative working position when bonding is performed; in the initial position, the angle between the extension directions of the connecting rod and the bonding rod is less than or equal to 30 degrees.
[0017] Optionally, in the initial position, the angle between the extension directions of the connecting rod and the wire-beating rod is less than or equal to 5 degrees.
[0018] Optionally, in the initial position, the angle between the extension directions of the connecting rod and the driving handle is 60 to 120 degrees.
[0019] Optionally, the transmission head is located in the middle of the length direction of the wire rod.
[0020] Optionally, the transmission head is cylindrical as a whole, with one axial end for the wire rod to pass through and fix, and the other end rotatably passing through the connecting rod, and an axial anti-slip component acting on two opposite sides of the connecting rod is provided at one end passing through the connecting rod.
[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-bonding 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 5 Enlarged view of part D in the middle;
[0032] Fig. 9 for Figure 6 Enlarged view of part E in the middle.
[0033] The reference numerals of the components are as follows:
[0034] 100, housing;
[0035] 110, crimping wheel;
[0036] 120, wire rack; 121, wire hole; 122, through hole; 123, inner edge;
[0037] 130, wire rod; 131, transmission head; 132, hook seat; 133, wire hook; 134, snap ring
[0038] 140, driving handle; 141, transmission hole; 142, working end; 143, return spring;
[0039] 150, connecting rod;
[0040] 160. first guide seat; 161. guide hole;
[0041] 170. Second guide seat; 171. Guide hole. DETAILED DESCRIPTION
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] like Figure 1 to Figure 3As 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.
[0048] 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.
[0049] 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.
[0050] See also Figures 4 to 9 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.
[0051] 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.
[0052] A guide seat is fixed on the wire frame 120, specifically a first guide seat 160 at the top and a second guide seat 170 at the bottom, which are arranged opposite to each other. In some cases, the number of guide seats can be increased as needed to obtain a corresponding guiding effect.
[0053] A plurality of hook seats 132 are fixedly arranged on the thread-beating rod 130, each hook seat 132 is respectively fixed with a thread-beating hook 133, each thread-beating hook is arranged between the thread pressing wheel 110 and the corresponding thread hole 121, and can touch the corresponding part of the suture when working. The two ends of the thread-beating rod 130 are respectively slidably matched with the guide seats on the corresponding sides.
[0054] One end of the driving handle 140 is used for transmission connection to the power mechanism. For example, a transmission hole 141 is provided at this end to connect the driving shaft extending from the inside of the housing 100. The other end of the driving handle 140 is a working end 142. A return spring 143 is provided between the driving handle 140 and the housing 100 or the wire rack 120 for maintaining the preset initial position of the driving handle 140.
[0055] A transmission head 131 and a working end 142 are fixed in the middle part of the wire rod (the middle one-third of the length), and the specific way of transmission cooperation with the wire rod 130 is through a hinged connection with a connecting rod 150, that is, the connecting rod 150 is hinged between the transmission head 131 and the working end 142 of the driving handle 140.
[0056] 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 guide seat is provided on the wire-passing frame 120. Through the restriction of the upper and lower guide seats, the wire-beating rod 130 makes a linear reciprocating motion relative to the wire-passing frame 120. For example, the first guide seat 160 is provided with a guide hole 161, and the second guide seat 170 is provided with a guide hole 171. The two ends of the wire-beating rod 130 slide through the guide holes on the corresponding sides.
[0057] In conjunction with this, the prior art method of directly driving the wire rod 130 through the driving handle 140 is improved, and instead a connecting rod 150 is added, and the unexpected driving direction is released to adapt to the linear reciprocating motion of the wire rod 130. Therefore, the wire rod 130 can achieve low-pair contact with the inner circumference of the guide hole through a smaller gap, thereby solving the noise and wear problems caused by high-pair contact.
[0058] In order to facilitate processing and take into account structural strength, the top and bottom of the wire frame 120 have integrated bending parts, and the bending parts constitute each guide seat.
[0059] The transmission head 131 is generally columnar, and one axial end of the transmission head 131 is provided with a mounting hole for the wire rod 130 to pass through and fix, and the other end is rotatably passed through the connecting rod 150, and an axial anti-slip component is provided at one end of the connecting rod 150 for acting on two opposite sides of the connecting rod 150. For example, the transmission head 131 has a positioning groove on its outer periphery, and a retaining ring 134 is provided in the groove for axial anti-slip.
[0060] When the driving handle 140 moves, the threading rod 130 is driven to move through the connecting rod 150 and the transmission head 131 in sequence. Since both ends of the connecting rod 150 are connected to corresponding components in a hinged manner, the threading rod 130 can reciprocate linearly with the cooperation of the guide seat.
[0061] See also Fig. 9 , each component in the wire-tying device has an initial position and a relative working position when performing wire-tying (specifically, it can be moved to the extreme position); in order to optimize the transmission, in a preferred embodiment, in the initial position, the angle between the extension direction L1 of the connecting rod 150 and the extension direction L2 of the wire-tying rod 130 is less than or equal to 30 degrees, for example, less than or equal to 5 degrees or even parallel to each other. Moreover, in the initial position, the angle between the extension direction L1 of the connecting rod 150 and the extension direction L3 of the driving handle 140 is 60 to 120 degrees. Reasonable transmission layout can enable the driving handle 140 to bring enough travel of the connecting rod 150 with a smaller amplitude, while reducing the movement resistance of the wire-tying rod 130.
[0062] One embodiment of the present application further provides a flat sewing machine as a sewing device, comprising a housing and the thread-binding device of the above embodiments.
[0063] 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 connecting rod 150 and the thread beating rod 130 to move downward, and at the same time limits the position through the guide seat to complete the thread beating action. This application optimizes the transmission layout of the existing thread beating device, 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 beating mechanism and improves the thread cutting stability.
[0064] 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.
[0065] 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-punching device with improved transmission structure, used in sewing equipment, characterized in that: The wire bonding device comprises: Thread guide, used for threading sutures; The guide seat comprises a first guide seat and a second guide seat which are arranged opposite to each other, and each guide seat is respectively fixed to the wire passing frame; The two ends of the thread-beating rod are respectively slidably matched with the guide seats on the corresponding sides, and a transmission head and a thread-beating hook acting on the suture are fixed on the thread-beating rod; A driving handle, one end of which is used to connect to the power mechanism and the other end is the working end; The connecting rod is hinged between the transmission head and the working end of the driving handle.
2. The wire-punching device with improved transmission structure as claimed in claim 1, characterized in that: The guide seat is provided with a guide hole, and the wire-beating rod is slidably inserted into the guide hole.
3. The wire-punching device with improved transmission structure as claimed in claim 2, characterized in that: The wire-beating rod performs linear reciprocating motion relative to the wire-passing frame, and the wire-beating rod is in low-pair contact with the inner circumference of the guide hole.
4. The wire-punching device with improved transmission structure as claimed in claim 1, characterized in that: The guide seat and the wire passing frame are an integrated structure.
5. The wire-punching device with improved transmission structure as claimed in claim 4, characterized in that: The guide seat is formed by partially bending the wire frame.
6. The wire-punching device with improved transmission structure as claimed in claim 1, characterized in that: Each component in the wire-bonding device has an initial position and a relative working position when the wire-bonding is implemented; in the initial position, the angle between the extending directions of the connecting rod and the wire-bonding rod is less than or equal to 30 degrees.
7. The wire-punching device with improved transmission structure as claimed in claim 6, characterized in that: In the initial position, the angle between the extending directions of the connecting rod and the wire-beating rod is less than or equal to 5 degrees.
8. The wire-punching device with improved transmission structure as claimed in claim 7, characterized in that: In the initial position, the angle between the extending directions of the connecting rod and the driving handle is 60-120 degrees.
9. The wire-punching device with improved transmission structure as claimed in claim 1, characterized in that: The transmission head is located in the middle of the length direction of the wire rod; The transmission head is generally columnar, with one axial end for the wire rod to penetrate and fix, and the other end rotatably penetrates the connecting rod, and an axial anti-slip component acting on two opposite sides of the connecting rod is provided at one end penetrating the connecting rod.
10. A flat sewing machine, comprising a housing and a thread-stitching device mounted on the housing, characterized in that: The wire-punching device is a wire-punching device with an improved transmission structure as described in any one of claims 1 to 9.