Line marker for sports training

Abstract

The utility model discloses a sports training is with scribe, include: wheel frame, fixedly insert one axle in the wheel frame, is equipped with the gyro wheel through the bearing on the axle, the outer wall department of gyro wheel is provided with gyro wheel groove coaxially, is fixed with operating lever at the outer end surface of wheel frame, is fixedly arranged with second axle at the bottom of wheel frame, and the both ends of second axle are equipped with auxiliary wheel through the bearing, the top of wheel frame is fixed with upper support, and the paint wheel rim is nested in gyro wheel groove, and part protrudes to the outside of gyro wheel groove, the fixed distance device is installed coaxially with axle, is used for limiting the line interval, the blanking device is fixedly installed through upper support, the position of fixed distance device is adjustable, and when using, with one side fixed distance wheel as the reference point and carries out the scribe, to ensure that the interval of two adjacent lines always keeps consistent.

Description

Technical Field

[0001] This utility model relates to a line marking device for sports training. Background Technology

[0002] School playgrounds, as the core venues for students' physical exercise, recess activities, and campus competitions, require regularly painted clear and standardized marking lines. These lines cover various types, including track lane lines, soccer / basketball court boundary lines, and long jump take-off board markings, with specific requirements for accuracy, safety, and durability. Currently, commonly used marking equipment for school playgrounds falls into two main categories: one is large professional marking machines, which, while highly accurate, are bulky, complex to operate, require professional personnel, and are costly and difficult to maintain, making them unsuitable for small-scale line additions or frequent line adjustments within the playground; the other is small manual marking tools (such as marking carts and chalk hoppers), which are simple to operate and low-cost, but we have encountered the following problems in their actual use: Line marking vehicles cannot draw lines at fixed intervals; they can only draw lines one by one, resulting in curved lines or uneven spacing.

[0003] The powder hopper is manually shaken to allow the powder to adhere to the ground. This method results in uneven powder output, inconsistent line width, and uneven spacing between lines.

[0004] To address this, we designed a line marking device for sports training that can mark lines at equal intervals and with uniform lines. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a line marking device for sports training that can mark lines at equal intervals and with uniform lines.

[0006] To solve the above problems, the present invention adopts the following technical solution: A line marking device for sports training, comprising: The wheel frame includes a fixed axle, on which rollers are mounted via bearings. Each roller has a coaxial groove on its outer wall. An operating lever is fixed to the outer end face of the wheel frame. A second axle is fixed to the bottom of the wheel frame, with auxiliary wheels mounted at both ends via bearings. An upper support is fixed to the top of the wheel frame. Painted wheel rim, wherein the painted wheel rim is fitted inside the roller groove and partially protrudes outside the roller groove; A distance-fixing device, which is coaxially mounted with the shaft, is used to limit the spacing between scribing lines; The feeding device is fixedly installed by the upper bracket, and its discharge end is in contact with the outer circumferential surface of the paint wheel ring so that the paint wheel ring picks up the colored powder falling from the feeding device as the roller rotates.

[0007] Preferably, the distance fixing device includes a sliding shaft and distance fixing wheels rotatably mounted at both ends of the sliding shaft via bearings. The sliding shaft passes axially through the shaft and slides coaxially along the shaft. A locking screw for fixing the sliding shaft is screwed into the outer wall of the shaft. The diameter of the paint wheel rim is larger than the diameter of the distance fixing wheel. The wheel frame is kept horizontal under the support of the distance fixing wheel and the auxiliary wheel.

[0008] Preferably, the coated wheel rim is a high-density sponge wheel rim with anti-slip texture on the surface.

[0009] Preferably, a scale is provided on the outer wall of the sliding shaft.

[0010] Preferably, the feeding device includes a hopper and an insert plate. A feeding pipe is provided at the bottom of the hopper, and a slot is provided at the bottom of the feeding pipe. The outer circumferential surface of the paint wheel is in contact with the inner wall of the slot. A slot is provided on the side of the feeding pipe. After the insert plate is inserted through the slot, it blocks part of the slot to change the feeding amount of the feeding pipe. The upper support is fixed to the hopper.

[0011] Preferably, the upper end of the hopper is connected to a hopper cover via a hinge.

[0012] Preferably, a light-transmitting window is embedded in the center of the silo cover to observe the amount of colored powder inside the silo.

[0013] Preferably, a bearing seat is provided on the side of the feed tube, and a screw is installed in the bearing seat via a bearing. The end of the insert plate away from the feed tube is bent upward to form a connecting part. A nut is fixed at the connecting part, and the screw passes through the nut. After the screw rotates, it drives the insert plate to slide along the slot.

[0014] The beneficial effects of this utility model are: One advantage is that the position of the distance measuring device is adjustable. When in use, the distance measuring wheel on one side is used as a reference point to draw lines to ensure that the distance between two adjacent lines is always consistent.

[0015] Secondly, the colored powder adheres to the paint wheel as it rotates, creating continuous lines with high consistency in width and continuity, resulting in uniform powder distribution.

[0016] Thirdly, the screw-driven insert plate feeding adjustment structure can slightly control the amount of powder fed, avoiding excessive feeding that could cause dust to rise—especially when patching lines on the playground during breaks, it can reduce the respiratory irritation of students in the vicinity caused by powder; at the same time, it can prevent insufficient feeding from causing the markings to wear easily, thus extending the service life of the markings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the device after the distance-fixing device has been removed; Figure 3 This is a structural diagram of the feeding device. Detailed Implementation

[0019] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0021] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and 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.

[0022] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] See Figure 1 and Figure 2 A line marking device for sports training, as shown, includes: A wheel frame 1 has a shaft 2 fixedly inserted inside it. Rollers 3 are mounted on the shaft 2 via bearings. Roller grooves (not shown) are coaxially formed on the outer wall of each roller 3. An operating lever 4 is fixed to the outer end face of the wheel frame 1. A second shaft 5 is fixed to the bottom of the wheel frame 1, and auxiliary wheels 6 are mounted on both ends of the second shaft 5 via bearings. An upper support 7 is fixed to the top of the wheel frame 1. Painted wheel rim 8, the painted wheel rim 8 is fitted inside the roller groove, and partially protrudes to the outside of the roller groove; A distance-fixing device 9 is coaxially mounted with the shaft 2 and is used to limit the spacing between the scribing lines. The feeding device 10 is fixedly installed by the upper bracket 7. Its discharge end is in contact with the outer peripheral surface of the paint wheel 8 so that the paint wheel 8 picks up the colored powder falling from the feeding device 10 when the roller 3 rotates.

[0025] See Figure 1 and Figure 2 As shown, the shaft 2 is a hollow shaft, and the distance fixing device 9 includes a sliding shaft 91 and distance fixing wheels 92 rotatably mounted on both ends of the sliding shaft 91 via bearings. The sliding shaft 91 passes axially through the shaft 2 and slides coaxially along the shaft 2. A locking screw 21 for fixing the sliding shaft 91 is screwed into the outer wall of the shaft 2. The diameter of the paint wheel 8 is larger than the diameter of the distance fixing wheel 92 so that the paint wheel 8 rolls in contact with the ground after elastic deformation. The wheel frame 1 remains horizontal under the support of the distance fixing wheel 92 and the auxiliary wheel 6.

[0026] A scale 911 is provided on the outer wall of the sliding shaft 91.

[0027] The fixed-distance wheel is made of ABS plastic, and its inner diameter is connected to both ends of the sliding shaft through a deep groove ball bearing (model 6001).

[0028] After the sliding shaft has slid along the shaft axis to the target position, tighten the locking screw.

[0029] When marking lines, the fixed-distance wheel on one side is used as a reference point. When the device is moved, the fixed-distance wheel, which serves as the reference point, needs to roll along the already drawn reference line.

[0030] The coated wheel rim 8 is a high-density sponge wheel rim with anti-slip texture on the surface.

[0031] Made of high-density sponge (density 0.4g / cm³), the sponge has a ring-shaped structure with an inner diameter that matches the roller groove and an outer diameter larger than the roller's outer diameter. Its thickness matches the width of the roller groove. The sponge surface is molded with anti-slip textures (texture depth 0.3cm), enhancing adhesion to the ground and improving the absorption capacity of colored powders (maximum powder absorption of 5g per application). During installation, the paint wheel is elastically fitted into the roller groove, relying on the sponge's own elasticity for fixation. Disassembly and replacement require only manual peeling, with an operation time of ≤10 seconds.

[0032] See Figure 1 and Figure 3 As shown, the feeding device 10 includes a hopper 101 and an insert plate 102. The hopper 101 has an inverted trapezoidal structure with a volume of approximately 3L (capable of holding 2kg of colored powder). A feeding pipe 103 is provided at the bottom of the hopper 101. A groove 104 is machined at the bottom of the feeding pipe 103. The outer circumferential surface of the paint wheel 8 is fitted with the inner wall of the groove 104. A slot 105 is provided on the side of the feeding pipe 103. After the insert plate 102 is inserted through the slot 105, it partially blocks the groove 104 to change the feeding amount of the feeding pipe 103. The upper support 7 is fixed to the hopper 101.

[0033] In the above technical solution, the feeding speed can be adjusted by adjusting the insertion depth of the insert plate, avoiding excessive feeding that would cause powder spillage, and also avoiding insufficient feeding that would result in insufficient powder adhesion to the paint wheel rim.

[0034] See Figure 3 As shown, the upper end of the hopper 101 is connected to the hopper cover 121 by a hinge.

[0035] The purpose of the silo cover is to prevent water from seeping in. A rubber sealing strip is attached to the bottom edge of the silo cover to increase the seal between the silo and the material silo.

[0036] A light-transmitting window 131 is embedded in the middle of the silo cover 121 to observe the amount of colored powder in the silo.

[0037] The light-transmitting window is made of acrylic.

[0038] See Figure 3 As shown, a bearing seat 141 is provided on the side of the feed tube 103. A screw 151 is installed in the bearing seat 141 via a bearing (the bearing is a deep groove ball bearing). The screw 151 is made of stainless steel (0.8 cm in diameter and 15 cm in length). The end of the insert plate 102 away from the feed tube 103 is bent upward to form a connecting part 161. A nut 171 is fixed at the connecting part 161. The screw 151 passes through the nut 171. After the screw rotates, it drives the insert plate to slide along the slot.

[0039] Drawing steps: Open the silo cover and fill it with an appropriate amount of colored powder (such as lime powder, environmentally friendly marking powder, etc.). The filling amount should not exceed 80% of the silo volume. Close the silo cover and ensure that the sealing strip is in place to prevent powder leakage.

[0040] Adjust the distance setting device according to the required width of the line to be drawn: loosen the locking screw, push the sliding shaft along the axis of the shaft, observe the scale on the outer wall of the sliding shaft, and make the distance between the distance setting wheel (as a reference point) and the roller consistent with the target line width. After adjustment, tighten the locking screw to fix the position of the sliding shaft.

[0041] Adjusting the feeding amount: Rotate the screw on the side of the feeding tube to drive the insert plate to slide along the slot, adjust the feeding amount of colored powder, push the device to make actual observation, and further adjust the feeding amount so that when the roller rotates, it can pick up an appropriate amount of colored powder through the paint wheel.

[0042] 2. Line drawing operation The operator holds the control lever and pushes the equipment to the starting position of the line to be marked, ensuring that the two fixed-distance wheels are in contact with the ground and that the wheel frame remains horizontal with the support of the fixed-distance wheels and auxiliary wheels.

[0043] The equipment is moved at a constant speed along the target marking direction, with the speed controlled between 0.5-1m / s (too fast a speed can cause discontinuous marking, while too slow a speed can cause powder accumulation). During the movement, the paint wheel rotates synchronously with the roller, picks up colored powder from the groove of the feed pipe, and imprints the powder onto the ground to form continuous markings.

[0044] During the marking process, the remaining powder level inside the hopper is observed in real time through the light-transmitting window. When the remaining powder level is less than 10% of the hopper volume, the mobile equipment is stopped, the hopper cover is opened to replenish the powder, and the operation continues until the marking is completed.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0047] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0048] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0049] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A line marker for sports training, characterized by comprising: include: The wheel frame includes a fixed axle, on which rollers are mounted via bearings. Each roller has a coaxial groove on its outer wall. An operating lever is fixed to the outer end face of the wheel frame. A second axle is fixed to the bottom of the wheel frame, with auxiliary wheels mounted at both ends via bearings. An upper support is fixed to the top of the wheel frame. Painted wheel rim, wherein the painted wheel rim is fitted inside the roller groove and partially protrudes outside the roller groove; A distance-fixing device, which is coaxially mounted with the shaft, is used to limit the spacing between scribing lines; The feeding device is fixedly installed by the upper bracket, and its discharge end is in contact with the outer circumferential surface of the paint wheel ring so that the paint wheel ring picks up the colored powder falling from the feeding device as the roller rotates.

2. The sports training chalk line of claim 1 wherein: The shaft is a hollow shaft. The distance fixing device includes a sliding shaft and distance fixing wheels rotatably mounted on both ends of the sliding shaft via bearings. The sliding shaft passes axially through the shaft and slides coaxially along the shaft. A locking screw for fixing the sliding shaft is screwed into the outer wall of the shaft. The diameter of the paint wheel rim is larger than the diameter of the distance fixing wheel. The wheel frame is kept horizontal under the support of the distance fixing wheel and the auxiliary wheel.

3. The sports training chalk line of claim 2 wherein: The coated wheel rim is a high-density sponge wheel rim with anti-slip texture on the surface.

4. The sports training chalk line of claim 2 wherein: A scale is provided on the outer wall of the sliding shaft.

5. The sports training chalk line of claim 1 wherein: The feeding device includes a hopper and an insert plate. A feeding pipe is provided at the bottom of the hopper, and a slot is provided at the bottom of the feeding pipe. The outer circumferential surface of the paint wheel is in contact with the inner wall of the slot. A slot is provided on the side of the feeding pipe. After the insert plate is inserted through the slot, it blocks part of the slot to change the feeding amount of the feeding pipe. The upper support is fixed to the hopper.

6. The sports training chalk line of claim 5 wherein: The upper end of the hopper is connected to a hopper cover via a hinge.

7. The sports training chalk line of claim 6 wherein: A light-transmitting window is embedded in the center of the silo cover to observe the amount of colored powder inside the silo.

8. The sports training chalk line of claim 5 wherein: A bearing seat is provided on the side of the feed tube, and a screw is installed in the bearing seat through a bearing. The end of the insert plate away from the feed tube is bent upward to form a connecting part. A nut is fixed at the connecting part, and the screw passes through the nut. After the screw rotates, it drives the insert plate to slide along the slot.

Images