Swing arm self-locking device and thread number printer with same
By designing a swing arm self-locking device on the online number printer, and using elastic parts and hinges to form a center dead point structure, the problem of uneven contact caused by swing arm vibration is solved, achieving stable printing effect and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING SAIN REED TECH CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional line marking printers lack an effective locking device for their swing arms, which causes the swing arms to swing unexpectedly when the print head vibrates, affecting print quality.
The swing arm self-locking device includes a fixed plate, transmission components, hinge components, elastic components, and a transmission shaft. The elastic components reset to drive the hinge components and transmission components to be collinear and form a center dead point structure with the stop part, thereby achieving reliable self-locking of the swing arm.
Ensuring uniform contact between the printhead and the duct surface improves print quality and reduces manufacturing costs.
Smart Images
Figure CN224335335U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of line marking printer technology, and more particularly to a swing arm self-locking device and a line marking printer having the same. Background Technology
[0002] Wire marking printers are used to print markings on conduits for wires and cables. Traditional wire marking printers are typically equipped with a clamping mechanism that flattens the conduit via a swing arm, allowing for better contact between the print head and the conduit surface. However, during operation, the print head's printing motion generates vibrations. Because the swing arm lacks an effective locking mechanism, these vibrations can cause it to swing unintentionally. This swinging motion leads to unstable contact between the clamping mechanism and the conduit, resulting in uneven contact between the print head and the conduit surface. Ultimately, this results in inconsistent marking density, severely impacting print quality. Summary of the Invention
[0003] In view of this, this application proposes a swing arm self-locking device suitable for locking the swing arm of a line number printer, comprising: a fixed plate, a first transmission component, a second transmission component, a hinge component, an elastic component, and a transmission shaft;
[0004] The drive shaft is vertically inserted through the fixed plate, and one end of the drive shaft is suitable for mounting the swing arm; the first transmission component is located on the side of the fixed plate away from the swing arm and is connected to the drive shaft.
[0005] A pin is fixedly provided on the fixed plate, and the pin is located on the same side as the first transmission component. One end of the second transmission component is hinged to the pin.
[0006] The fixed plate is provided with a positioning part, one end of the elastic element is connected to the positioning part, and the other end is connected to the end of the second transmission element away from the pin shaft;
[0007] The two ends of the hinge are respectively hinged to the end of the second transmission component away from the pin shaft and the end of the first transmission component away from the transmission shaft;
[0008] The second transmission member has a stop on the side facing the positioning part, which is suitable for the hinge and the axis of the second transmission member to be collinear when the elastic member contracts and resets, and the hinge and the stop abut against each other to form a center dead point structure.
[0009] In one possible implementation, a bushing is provided on the fixed plate; the drive shaft is rotatably disposed within the bushing.
[0010] In one possible implementation, a first open retaining ring is also included, which is mounted on the drive shaft and located between the first drive member and the bushing.
[0011] In one possible implementation, a second open retaining ring is also included; a first rivet shaft is provided on the side of the first transmission member facing the hinge member, and one end of the hinge member is hinged to the first rivet shaft; the second open retaining ring is mounted on the first rivet shaft and is located on the side of the hinge member away from the first transmission member.
[0012] In one possible implementation, a third open retaining ring is also included; a second rivet shaft is provided on the side of the hinge member facing the second transmission member, and the second rivet shaft is disposed opposite to the first rivet shaft; one end of the second transmission member is hinged to the second rivet shaft; the third open retaining ring is mounted on the second rivet shaft and is located on the side of the second transmission member away from the hinge member.
[0013] In one possible implementation, the hinge is provided with a traction part; the traction part is located on the side of the second rivet shaft away from the hinge and is adjacent to the hinge of the second transmission member and the hinge of the hinge.
[0014] In one possible implementation, the elastic element is a tension spring.
[0015] According to another aspect of this application, a line number printer is provided, including any of the aforementioned swing arm self-locking devices.
[0016] Beneficial effects of this application
[0017] When the printer is running, the elastic element contracts and resets, causing the hinge point between the hinge and the second transmission element to move towards the elastic element. This causes the second transmission element to rotate around the pin, transmitting the force of the rotation to the hinge, ensuring that the axes of the hinge and the second transmission element are collinear. The hinge and the stop abut against each other to form a center dead point structure. At this time, the swing arm is locked in the holding position. The force generated by the print head vibration is transmitted through the swing arm and the transmission shaft to the first transmission element and then along the axis of the hinge. Since the hinge and the second transmission element are collinear, the force passes directly through the hinge point between the second transmission element and the hinge, preventing the hinge and the second transmission element from generating rotational torque. At the same time, the stop forms a mechanical block on the hinge, thus achieving reliable self-locking of the swing arm and preventing the swing arm from swinging due to vibration.
[0018] The self-locking device of this application uses the elastic element to reset and retract, making the hinge and the second transmission component collinear, and rigidly abutting with the stop to form a center dead point structure. This prevents the force generated by the print head vibration from causing the hinge and the second transmission component to generate a rotational torque. At the same time, the stop provides mechanical obstruction, thereby locking the swing arm in the holding position, preventing the swing arm from swinging due to vibration, ensuring stable contact between the holding component on the swing arm and the tube, and thus ensuring uniform contact between the print head and the tube surface, resulting in clear and consistent printed markings, significantly improving print quality. The self-locking device of this application has a simple structural design, fewer parts, and simple processing and assembly processes, reducing manufacturing costs.
[0019] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0020] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.
[0021] Figure 1 An exploded view of the swing arm self-locking device according to an embodiment of this application is shown;
[0022] Figure 2 This application shows an axial view of the swing arm self-locking device according to an embodiment of the present application;
[0023] Figure 3 A bottom view of the swing arm self-locking device according to an embodiment of this application is shown;
[0024] Figure 4 This is a front view of the swing arm self-locking device according to an embodiment of this application.
[0025] Fixed plate—100; Pin—110; Bushing—111; Positioning part—120; Drive shaft—210; First open retaining ring—211; Swing arm—220; First transmission component—300; First rivet shaft—310; Second open retaining ring—320; Second transmission component—400; Stopping part—410; Lug—420; Fourth open retaining ring—430; Hinge—500; Second rivet shaft—510; Third open retaining ring—520; Traction part—530; Elastic component—600. Detailed Implementation
[0026] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.
[0027] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.
[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.
[0031] This application proposes a self-locking device for a swing arm, suitable for locking the swing arm 220 of a line marking printer, such as... Figures 1 to 4As shown, it includes: a fixed plate 100, a first transmission component 300, a second transmission component 400, a hinge component 500, an elastic component 600, and a transmission shaft 210; the transmission shaft 210 is vertically inserted through the fixed plate 100, and one end of the transmission shaft 210 is adapted to mount a swing arm 220; the first transmission component 300 is located on the side of the fixed plate 100 away from the swing arm 220 and is connected to the end of the transmission shaft 210 away from the swing arm 220; a pin 110 is fixedly mounted on the fixed plate 100, and the pin 110 is located on the same side as the first transmission component 300; one end of the second transmission component 400 is hinged to the pin 110; the two ends of the hinge component 500 are... The ends of the first transmission member 300 and the second transmission member 400 are respectively hinged to the end opposite to the pin 110 and the end opposite to the transmission shaft 210. The fixed plate 100 is provided with a positioning part 120. One end of the elastic member 600 is connected to the positioning part 120 and the other end is connected to the end of the second transmission member 400 opposite to the pin 110. The second transmission member 400 is provided with a stop part 410 on the side facing the positioning part 120. When the elastic member 600 retracts and resets, the hinge member 500 is collinear with the axis of the second transmission member 400 and the stop part 410 abut against each other to form a center dead point structure.
[0032] It should be noted that the fixing plate 100 is used to install the swing arm self-locking device in the line number printer. The fixing plate 100 is suitable for providing an installation foundation and support platform for the swing arm self-locking device. The drive shaft 210 is set vertically through the fixing plate 100 and can rotate along its axis. The two ends of the drive shaft 210 are fixedly connected to the swing arm 220 and the first transmission component 300, respectively, so that the swing arm 220, the first transmission component 300 and the drive shaft 210 move synchronously. A holding component is installed on the swing arm 220. The swing arm 220 drives the holding component to the holding working position by swinging. The holding component applies pressure to the tube, causing the cross-section of the tube to deform to form a planar area, so that the print head can make close contact with the surface of the tube, ensuring clear and uniform printing effect. The swing arm 220 is fixedly connected to the drive shaft 210, thereby converting the rotation of the drive shaft 210 into its own swing, thereby realizing the pressing and releasing operation of the holding component on the tube. The pin 110 is set on the fixing plate 100. The pin 110 is hinged to one end of the second transmission member 400 and is adapted to provide a rotation fulcrum for the second transmission member 400. The two ends of the hinge member 500 are respectively hinged to the first transmission member 300 and the second transmission member 400 to form a linkage structure, thereby realizing the transmission of force between the first transmission member 300 and the second transmission member 400. The elastic member 600 is adapted to provide a force to the second transmission member 400 in the direction of the positioning part 120, so that the second transmission member 400 makes a circular motion with the pin 110 as the center, thereby realizing that the axis of the second transmission member and the hinge member 500 are collinear. Then, the hinge member 500 and the stop part 410 on the second transmission member abut against each other to form a center dead point structure. The stop part 410 is fixedly set on the second transmission member 400 and located near the end of the pin 110. The stop part 410 is adapted to abut against the hinge member 500 to limit the relative movement of the hinge member 500 and the second transmission member, thereby realizing the locking of the swing arm 220.
[0033] When the printer is running, the elastic element 600 retracts and resets, causing the hinge point between the hinge member 500 and the second transmission member 400 to move towards the elastic element 600. This causes the second transmission member 400 to perform a circular motion around the pin 110. The second transmission member 400 transmits the force of the circular motion to the hinge member 500, making the axes of the hinge member 500 and the second transmission member 400 collinear. The hinge member 500 abuts against the stop part 410 to form a center dead point structure. At this time, the swing arm 220 is locked in the pressing working position, and the print head vibrates. The force generated by the movement is transmitted through the swing arm 220 and the transmission shaft 210 to the first transmission member 300 and then along the axial direction of the hinge member 500. Since the hinge member 500 and the second transmission member 400 are in a collinear state, the force will directly pass through the hinge point between the second transmission member 400 and the hinge member 500, thereby preventing the hinge member 500 and the second transmission member 400 from generating rotational torque. At the same time, the stop part 410 forms a mechanical block on the hinge member 500, thereby achieving reliable self-locking of the swing arm 220 and preventing the swing arm 220 from swinging due to vibration.
[0034] When the line printer stops to change materials, the hinge point between the drive hinge 500 and the second transmission member 400 moves away from the elastic member 600. This causes the second transmission member 400 to move in a circular motion around the pin 110. At this time, the hinge 500 is subjected to the force of the second transmission member 400, causing the axis of the hinge 500 to deviate from the collinear state. At the same time, the hinge 500 disengages from the stop part 410. At this time, the swing arm 220 is no longer locked by the center dead point structure, and the operator can move the swing arm 220 freely to perform operations such as material replacement.
[0035] The self-locking device of the swing arm 220 in this application uses the elastic element 600 to reset and retract, making the axis of the hinge 500 collinear with that of the second transmission element 400, and rigidly abutting with the stop part 410 to form a center dead point structure. This prevents the force generated by the vibration of the print head from causing the hinge 500 and the second transmission element 400 to generate a rotational torque. At the same time, the stop part 410 provides mechanical obstruction, thereby locking the swing arm 220 in the pressing working position, preventing the swing arm 220 from swinging due to vibration, ensuring stable contact between the pressing element on the swing arm 220 and the tube, and thus ensuring uniform contact between the print head and the surface of the tube, resulting in clear and consistent printed markings, significantly improving print quality. The self-locking device of the swing arm 220 in this application has a simple structural design, fewer parts, and simple processing and assembly processes, reducing manufacturing costs.
[0036] In one possible implementation, the main body of the drive shaft 210 is cylindrical. The end of the drive shaft 210 connected to the first transmission member has an axial cross-section, which is parallel to the axis of the drive shaft 210 and extends along the length of the drive shaft 210. Correspondingly, the first transmission member 300 has a first mounting hole. The first mounting hole matches the outer contour of the axial cross-section of the drive shaft 210. The drive shaft 210 passes through the first mounting hole of the first transmission member 300. The irregular design of the first mounting hole avoids the circumferential sliding that occurs when the traditional cylindrical drive shaft 210 is fitted with a circular mounting hole. When the drive shaft 210 rotates, the interlocking of the irregular cross-sections ensures that the first transmission member 300 and the drive shaft 210 move synchronously, thus achieving stable power transmission.
[0037] In one possible implementation, the positioning part 120 is disposed on one side of the fixed plate 100, and the plate surface of the positioning part 120 is disposed facing the second transmission member 400. Correspondingly, the second transmission member 400 is provided with a hanging ear 420, and the hanging ear 420 is disposed on the same side as the stop part 410. One end of the elastic member 600 is connected to the positioning part 120, and the other end of the elastic member 600 is fixedly connected to the hanging ear 420.
[0038] Furthermore, the positioning part 120 and the fixing plate 100 are integrally formed.
[0039] In one possible implementation, the elastic element 600 is a tension spring.
[0040] In one possible implementation, a bushing 111 is provided on the fixed plate 100; the drive shaft 210 is rotatably disposed within the bushing 111; the bushing 111 is suitable for providing stable support for the drive shaft 210, reducing friction between the drive shaft 210 and the fixed plate 100, and extending the service life of the drive shaft 210.
[0041] In one possible implementation, a first open retaining ring 211 is also included. The first open retaining ring 211 is mounted on the drive shaft 210 and located between the first transmission member 300 and the bushing 111. The main body of the first open retaining ring 211 is an annular plate structure with an opening. The first open retaining ring 211 has a certain elasticity. The first open retaining ring 211 is fitted into the axial positioning groove of the drive shaft 210. The first open retaining ring 211 cooperates with the positioning groove on the drive shaft 210 by means of elastic tension, effectively limiting the displacement of the first transmission member 300 along the axial direction of the drive shaft 210, and ensuring that the first transmission member 300 and the drive shaft 210 always maintain a stable connection.
[0042] In one possible implementation, a second opening retaining ring 320 is also included; a first rivet shaft 310 is provided on the side of the first transmission member 300 facing the hinge member 500, and one end of the hinge member 500 is hinged to the first rivet shaft 310; the second opening retaining ring 320 is mounted on the first rivet shaft 310 and is located on the side of the hinge member 500 away from the first transmission member 300.
[0043] It should be noted that the first rivet shaft 310 is fixedly installed on the side of the first transmission member 300 away from the fixed plate 100. The first rivet shaft 310 is suitable for realizing the hinge between the hinge member 500 and the first transmission member 300. One end of the hinge member 500 is provided with a second mounting hole, which is adapted to the outer contour of the first rivet shaft 310. One end of the hinge member 500 is installed on the first rivet shaft 310 so that the hinge member 500 and the first transmission member 300 can move relative to each other. The other end of the hinge member 500 is hinged to the end of the second transmission member 400 away from the pin shaft 110. The second open retaining ring 320 is tightly locked in the axial positioning groove of the first rivet shaft 310 to prevent the hinge member 500 from moving axially on the first rivet shaft 310, thus ensuring the stability of the hinge member 500 during movement.
[0044] In one possible implementation, a third opening retaining ring 520 is also included; a second rivet shaft 510 is provided on the side of the hinge member 500 facing the second transmission member 400, and the second rivet shaft 510 is disposed opposite to the first rivet shaft 310; one end of the second transmission member 400 is hinged to the second rivet shaft 510; the third opening retaining ring 520 is mounted on the second rivet shaft 510 and is located on the side of the second transmission member 400 away from the hinge member 500. It should be noted that the second rivet shaft 510 is fixedly mounted on the hinge member 500 and located at the end of the hinge member 500 opposite to the first transmission member 300. The second hinge shaft is suitable for achieving the hinge between the hinge member 500 and the second transmission member 400. The second transmission member 400 has a third mounting hole, which is adapted to the outer contour of the second rivet shaft 510. One end of the second transmission member 400 is mounted on the second rivet shaft 510, and the other end of the second transmission member 400 is hinged to the pin 110. The third open retaining ring 520 is tightly locked in the axial positioning groove of the second rivet shaft 510, which prevents the second transmission member 400 from axially moving on the second rivet shaft 510 and ensures the stability of the second transmission member 400 during movement.
[0045] Furthermore, a fourth mounting hole is provided on the second transmission component 400. The fourth mounting hole is symmetrically arranged with the third mounting hole and matches the outer contour of the pin 110. The second transmission component 400 is hinged to the pin 110 through the second mounting hole. The fourth open retaining ring 430 is tightly locked in the axial positioning groove of the pin 110, and the fourth open retaining ring 430 is located on the side of the second transmission component 400 away from the fixed plate 100. The fourth open retaining ring 430 prevents the second transmission component 400 from axially moving on the first pin 110, ensuring the stability of the second transmission component 400 during movement.
[0046] In one possible implementation, the first open retaining ring 211, the second open retaining ring 320, the third open retaining ring 520 and the fourth open retaining ring 430 are all matching national standard open retaining rings.
[0047] In one possible implementation, the hinge 500 is provided with a traction part 530; the traction part 530 is located on the side of the second rivet shaft 510 away from the hinge 500, and is adjacent to the hinge of the second transmission member 400 and the hinge of the hinge 500; it should be noted that the traction part 530 is fixedly located on the side of the hinge 500 away from the positioning part 120. This design allows the traction part 530 to be directly connected to the drive device in the line number printer without affecting the movement of the hinge 500; when it is necessary to change materials, the drive device applies force or torque in the opposite direction to the positioning part 120 through the traction part 530, causing the hinge 500 and the second transmission member 400 to move in the direction away from the positioning part 120 to release the center dead point structure, thereby realizing the unlocking operation of the swing arm 220.
[0048] According to another aspect of this application, a line number printer is provided, including any of the aforementioned swing arm self-locking devices.
[0049] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A self-locking device for a swing arm, suitable for locking the swing arm of a line marking printer, characterized in that, include: Fixed plate, first transmission component, second transmission component, hinge component, elastic component, and transmission shaft; The drive shaft is vertically inserted through the fixed plate, and one end of the drive shaft is adapted to mount the swing arm; the first transmission component is disposed on the side of the fixed plate opposite to the swing arm and is connected to the drive shaft. A pin is fixedly provided on the fixed plate, and the pin is located on the same side as the first transmission member. One end of the second transmission member is hinged to the pin. The fixed plate is provided with a positioning part, one end of the elastic member is connected to the positioning part, and the other end is connected to the end of the second transmission member away from the pin. The two ends of the hinge are respectively hinged to the end of the second transmission member away from the pin and the end of the first transmission member away from the transmission shaft. The second transmission member has a stop portion on its side facing the positioning part, which is suitable for the hinge member and the axis of the second transmission member to be collinear when the elastic member contracts and resets, and the hinge member and the stop portion to abut against each other to form a center dead point structure.
2. The swing arm self-locking device according to claim 1, characterized in that, The fixed plate is provided with a bushing; the transmission shaft is rotatably disposed within the bushing.
3. The swing arm self-locking device according to claim 2, characterized in that, It also includes the first opening retaining ring, The first open retaining ring is mounted on the drive shaft and is located between the first transmission member and the bushing.
4. The swing arm self-locking device according to claim 1, characterized in that, It also includes a second opening retaining ring; The first transmission member has a first rivet shaft on the side facing the hinge member, and one end of the hinge member is hinged to the first rivet shaft; The second open retaining ring is mounted on the first rivet shaft and is located on the side of the hinge member away from the first transmission member.
5. The swing arm self-locking device according to claim 4, characterized in that, It also includes a third opening retaining ring; The hinge member is provided with a second rivet shaft on the side facing the second transmission member, and the second rivet shaft is arranged opposite to the first rivet shaft; One end of the second transmission component is hinged to the second rivet shaft; The third open retaining ring is mounted on the second rivet shaft and is located on the side of the second transmission member away from the hinge member.
6. The swing arm self-locking device according to claim 5, characterized in that, The hinge is provided with a traction part; The traction part is located on the side of the second rivet shaft away from the hinge member, and is adjacent to the hinge of the second transmission member and the hinge member.
7. The swing arm self-locking device according to claim 1, characterized in that, The elastic element is a tension spring.
8. A line marking printer, characterized in that, Includes the swing arm self-locking device as described in any one of claims 1 to 7.