Universal rolling device

Abstract

The utility model provides a kind of universal rolling device, comprising: shell, is provided with lifting channel along vertical direction on it;Several rolling members, are evenly distributed on the circumference of the center of the shell bottom and can roll 360 °;Push rod, along the first horizontal direction sliding and penetrating the shell;Sliding part, it is set on the push rod, with the oblique channel of the first horizontal direction angle arrangement and along the horizontal channel of the first horizontal direction arrangement;Stop piece, penetrate the lifting channel and with the sliding part sliding connection, to make the stop piece between high and low switching;Through the oblique cooperation of push rod and stop piece, namely, stop effect is generated, without setting brake lever, foot switch, spring and the like auxiliary parts, simple structure is matched without vulnerable parts, with the advantages of low cost, simplify assembly steps, more suitable for mass production.

Description

Technical Field

[0001] This utility model relates to a furniture accessory, and more particularly to a universal rolling device. Background Technology

[0002] In daily life and industrial production, casters are widely used on the bottom of products such as furniture, tool carts, and medical devices, serving as key components for enabling flexible movement of equipment. Currently, the most common casters on the market are mainly divided into two categories: roller casters and ball-bearing casters. Among them, ball-bearing casters are particularly widely used in lightweight equipment (such as office chairs and small storage cabinets) due to their small contact area with the ground and low turning resistance.

[0003] Existing universal rolling devices with stopping function mostly use vertical pressing or rotation triggering methods for their stopping components (such as brake pads and clamping blocks). Vertical pressing relies on spring rebound; insufficient pressing will cause the universal wheel to fail to stop, while excessive pressing will damage the components. Repeated use of the spring will also lead to insufficient stopping force. Rotation triggering requires the finger to rotate the knob, and if the knob surface is smooth, it is easy to slip.

[0004] Some products achieve stopping by squeezing rolling parts (such as rollers and balls), but the contact area between the rolling parts and the squeezing parts is small, and the stopping is easily caused by rough ground or vibration.

[0005] Therefore, there is an urgent need for a universal rolling device that is simple in structure, has no easily damaged parts, is easy to operate, has stable stopping, and is highly adaptable. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a universal rolling device that allows the stop to be raised and lowered by sliding a push rod laterally, thus meeting the requirements of convenient operation and stable stopping. The technical solution adopted by this utility model is as follows: A universal rolling device, comprising: The outer casing has a vertical lifting channel on its upper surface; Several rolling elements are evenly distributed on the circumference of the center of the bottom of the housing and are capable of 360° rolling. The push rod slides along a first horizontal direction and penetrates the housing; The sliding part, provided on the push rod, has an oblique channel arranged at an angle to the first horizontal direction and a horizontal channel arranged along the first horizontal direction; A stop member passes through the lifting channel and is slidably connected to the sliding part, so that the stop member can switch between a high position and a low position; When the push rod moves to one side, the stop slides along the sliding part and descends to a low position along the lifting channel. The stop cooperates with the horizontal channel and simultaneously contacts the ground. As the rod moves to the other side, the stop slides along the sliding part and rises to a high position along the lifting channel. The stop cooperates with the inclined channel and leaves the ground at the same time.

[0007] Furthermore, the stop includes: The cylindrical segment is capable of sliding within the lifting channel; The column section extends upward from the bottom of the cylindrical section; A sliding component is disposed on the column section and slidably connected to the sliding part.

[0008] Furthermore, the sliding part includes: Upper inclined groove; The lower inclined groove is arranged vertically at intervals from the upper inclined groove, and one end of it extends to the bottom of the push rod; The sliding component includes: A slider is mounted on the column section and slides along the upper inclined groove; The protruding rib is provided at the top of the cylindrical section and slides along the lower inclined groove or the bottom surface of the push rod.

[0009] Furthermore, there are two upper inclined grooves, which are mirror-symmetrically arranged on both sides of the push rod along the second horizontal direction; there are two column sections, which are spaced apart on the top of the cylindrical section, and sliders are respectively provided on the two column sections, and the two ends of the protrusion are respectively connected to the two column sections.

[0010] Furthermore, it also includes: Two spring pieces are arranged at intervals on the push rod along a first horizontal direction and are mirror-symmetrical with respect to the center line of the push rod along a second horizontal direction. A cylindrical protrusion is provided on one side surface of the spring piece along the second horizontal direction. Two positioning posts are located inside the outer casing and are respectively arranged corresponding to the two spring pieces; In this process, the push rod slides to either side, one of the spring pieces passes the corresponding positioning post, the spring piece elastically deforms when the cylindrical protrusion on the spring piece contacts the positioning post, the spring piece rebounds when the cylindrical protrusion on the spring piece leaves the positioning post, and the stop is in a high or low position.

[0011] Furthermore, the push rod is provided with: Two grooves, each of which extends in an L-shape from the side of the push rod toward its interior, such that a spring is formed between the groove and the side of the push rod.

[0012] Furthermore, it also includes: Two shoulders are formed on the push rod and are mirror-symmetrical with respect to the centerline of the push rod in the second horizontal direction; Two horizontal limiting frames are located inside the outer shell and correspond to the two shoulder sections respectively; When one of the shoulders abuts against the corresponding horizontal limiting frame, the stop is in a low or high position.

[0013] Further, the housing includes: Upper casing; The lower housing is detachably connected to the upper housing and forms a switch channel along a first horizontal direction, with the push rod passing through the switch channel; A central hole is located at the center of the bottom of the lower housing, and the stop passes through the central hole.

[0014] Furthermore, the rolling element is a ball bearing; The outer casing also includes: A plurality of rolling cavities are disposed inside the upper housing to accommodate the rolling balls, wherein the inner diameter of the rolling cavities is not greater than the diameter of the rolling balls; Several through holes are provided at the bottom of the lower housing, and the ball passes through the through holes, the diameter of which is smaller than the diameter of the ball.

[0015] Furthermore, it also includes: A threaded connector is located on the upper housing. Through-hole seat, located on the lower housing; A bolt passes through the through hole and is threadedly connected to the threaded connection seat.

[0016] Furthermore, it also includes: An adhesive portion is provided on the top of the housing; and / or, An anti-slip component is provided at the bottom of the stop; and / or, Anti-slip textures are respectively provided on the two end faces of the push rod along the first horizontal direction.

[0017] Advantages of this utility model: The stop effect is achieved by the oblique engagement of the push rod and the stop, eliminating the need for auxiliary parts such as brake levers, foot switches, and springs. The simple structure with no easily damaged parts offers advantages such as low cost and simplified assembly steps, making it more suitable for mass production. Through the structural cooperation between the stop and the sliding part, when the push rod slides, the slider and the convex are subjected to force along the upper and lower inclined grooves respectively, which disperses the force points of the push rod and avoids local stress concentration caused by a single inclined groove. At the same time, when the stop is in the low position, the bottom surface of the push rod that the convex contacts is a plane. The reaction force of the ground to the stop is perpendicular to this plane and there is no oblique force, which reduces the possibility of push rod breakage. Two sliders slide in the upper inclined groove, and a convex rib slides in the lower inclined groove. Together with the cylindrical section, they move up and down in the lifting channel to form a "triple guide" structure, which greatly reduces the vertical error of the stop. The stop block only moves up and down in the vertical direction, without horizontal offset or tilt. By using the spring and positioning post, the user can quickly determine whether the stop block has reached the high or low position by using the sticking sensation and slight sound generated when the spring deforms and returns to its original position. At the same time, the spring and positioning post can form a temporary positioning point. After the stop block reaches the high or low position, if there is no external force pushing the push rod, the elasticity of the spring can limit the sliding of the push rod, avoid the push rod displacement caused by vibration or touch, and maintain the stop state. The maximum sliding distance of the push rod is limited by the shoulder and horizontal limit frame to prevent the push rod from sliding excessively and causing the stop to jam. Both the push rod and the stop are modularly designed, with a high degree of structural integration. Parts can be replaced independently, resulting in low maintenance costs. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present invention.

[0019] Figure 2 A schematic diagram of the structure when the stopper is in the low position.

[0020] Figure 3 A schematic diagram of the structure when the stopper is in the high position.

[0021] Figure 4 This is a first-person exploded view of the present invention.

[0022] Figure 5 This is a second-view exploded view of the present invention.

[0023] Figure 6 This is a first-person view structural diagram of the push rod.

[0024] Figure 7 This is a second-view structural diagram of the push rod.

[0025] Figure 8 This is a cross-sectional view of the push rod and the upper housing assembly.

[0026] Figure 9 This is a cross-sectional view of the assembly of the rolling element and the housing.

[0027] Figure 10 This is a cross-sectional view of the bolts and housing assembly.

[0028] In the diagram: 100-outer shell, 100a-positioning post, 100b-switch channel, 110-upper shell, 111-horizontal limit frame, 112-rolling cavity, 113-threaded connection seat, 114-adhesive part, 115-vertical guide frame, 116-spherical protrusion, 120-lower shell, 121-intermediate hole, 122-through hole, 123-through hole seat, 200-rolling element, 300-push rod, 300a-upper inclined groove, 300b-lower inclined groove, 330c-shaped groove, 310-straight section, 320-button section, 330-spring piece, 331-cylindrical protrusion, 410-cylindrical section, 420-column section, 421-slider, 430-protrusion, 440-anti-slip element. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0030] Please see the appendix Figure 1 -Appendix Figure 3 This application proposes a universal rolling device, including a housing 100, a plurality of rolling elements 200, a push rod 300, a sliding part, and a stop 400. A lifting channel is provided on the housing 100 in a vertical direction; the plurality of rolling elements 200 are evenly distributed on the circumference of the bottom center of the housing 100 and are capable of 360° rolling; the push rod 300 slides along a first horizontal direction and passes through the housing 100; the sliding part is disposed on the push rod 300 and has an oblique channel arranged at an angle to the first horizontal direction and a horizontal channel arranged along the first horizontal direction; the stop 400 passes through the lifting channel and is slidably connected to the sliding part, so that the stop 400 switches between a high position and a low position.

[0031] When the push rod 300 moves to one side, the stop 400 slides along the sliding part and descends to a low position along the lifting channel. The stop 400 cooperates with the horizontal channel and simultaneously contacts the ground. As the rod 300 moves to the other side and the stop 400 slides along the sliding part, it rises to a high position along the lifting channel. The stop 400 then engages with the inclined channel and leaves the ground.

[0032] For ease of understanding, the first horizontal direction in this application is the left-right direction, and the second horizontal direction is the front-back direction.

[0033] The oblique and horizontal channels of the sliding part are key to converting the horizontal movement of the push rod 300 into the lifting and lowering movement of the stop 400 and maintaining the stop 400 in a low position. Since the lifting channel on the outer casing 100 restricts the stop 400 from moving horizontally, when the push rod 300 moves along the first horizontal direction, the sliding connection between the stop 400 and the oblique channel converts the horizontal movement of the push rod 300 into the vertical movement of the stop 400, so that the stop 400 only moves vertically relative to the outer casing 100. When the stop 400 descends to the low position and contacts the ground, with the horizontal movement of the push rod 300, the engagement between the stop 400 and the sliding part switches from the oblique channel to the horizontal channel. Therefore, the reaction force of the ground acts vertically on the bottom surface of the push rod 300 rather than the oblique channel, and there is no oblique force. Thus, the stop 400 can be kept in a stopped state, avoiding the stop 400 from failing to stop and reducing the possibility of the push rod breaking.

[0034] Reference Appendix Figure 2 and attached Figure 3 This demonstrates the positional states of the stop 400 between its high and low positions. In actual use, the outer casing 100 is placed under the table legs, the rolling element 200 is in contact with the ground, and the stop 400 is in its high position. The table can be moved by rolling the rolling element 200 on the ground. When the table needs to be stopped, the push rod 300 is pushed, causing the stop 400 to slide within the sliding part and descend within the lifting channel until the stop 400 moves to its low position, where it contacts the ground and generates static friction, stopping the table. To move the table, the push rod 300 is pushed in the opposite direction to lift the stop 400 off the ground. The stopping effect is achieved through the cooperation of the push rod 300 and the stop 400 in the sliding part with its inclined channel. This eliminates the need for auxiliary parts such as brake levers, foot switches, and springs, resulting in a simple structure with no easily damaged parts. It offers advantages such as low cost and simplified assembly steps, making it more suitable for mass production.

[0035] It should be noted that once the stop 400 leaves the ground, it can be considered to have reached a high position. Therefore, the vertical travel of the stop 400 does not need to be very long. The required travel length of the push rod 300 in the first horizontal direction can be calculated by considering the angle between the inclined channel and the first horizontal direction. Thus, the length of the push rod 300 extending beyond the housing 100 can be effectively controlled. If the push rod 300 is too long, it will cause part of the structure to protrude, which is both unsightly and could easily trip pedestrians.

[0036] In order to achieve the cooperation between the stop 400 and the sliding part, that is, to achieve the cooperation between the stop part in the oblique channel and the horizontal channel, in this application, as shown in the appendix Figure 2 -Appendix Figure 5As shown, the stop 400 includes a cylindrical section 410, a column section 420, and a sliding assembly. The cylindrical section 410 is slidable within the lifting channel. The column section 420 extends upward from the bottom of the cylindrical section 410. The sliding assembly is disposed on the column section 420 and slidably connected to the sliding portion. The column section 420 is parallel to or conforms to the side of the push rod 300 and is used to restrict the torsion of the stop 400.

[0037] In one embodiment, the sliding part includes an upper inclined groove 300a and a lower inclined groove 300b, the lower inclined groove 300b and the upper inclined groove 300a are arranged at intervals in the vertical direction, and one end of the lower inclined groove 300b extends to the bottom of the push rod 300; the sliding assembly includes a slider 421 and a protrusion 430, the slider 421 is disposed on the column section 420 and slides along the upper inclined groove 300a; the protrusion 430 is disposed on the top of the cylindrical section 410 and slides along the lower inclined groove 300b or the bottom surface of the push rod 300.

[0038] In this embodiment, the inclined channel includes an upper inclined groove 300a and a lower inclined groove 300b, and the horizontal channel is the bottom surface of the push rod 300 connected to the bottom of the lower inclined groove 300b; as shown in the attached figure. Figure 2 and attached Figure 3 As shown, when the stop 400 switches between high and low positions, the slider 421 will never disengage from the upper inclined groove 300a, which also limits the stroke of the push rod 300 in the first horizontal direction. Utilizing the elasticity of the thin sheet structure of the column section 420, it is inserted upward into the housing 100. The slider 421 slides along the surface of the push rod 300 until it enters the upper inclined groove 300a, and the column section 420 returns to its original shape. This simple assembly not only prevents the push rod 300 and the stop 400 from disengaging from the housing 100, but also limits the stroke of the push rod 300 and the stop 400.

[0039] Due to the self-weight of the stop 400, the high and low position switching is mainly achieved by the sliding of the slider 421 and the upper inclined groove 300a during the cooperation between the stop 400 and the inclined channel. The main function of the lower inclined groove 300b is to avoid the movement trajectory of the protrusion 430 and prevent movement interference. At the same time, when the protrusion 430 transitions to the horizontal channel in the lower inclined groove 300b, the stop 400 is always in line-to-surface or surface-to-surface contact with the bottom surface of the push rod 300, which further enhances the stress stability of the stop 400. The increased thickness of the combination of the protrusion 430 and the cylindrical section 410 also strengthens the structural strength of the stop 400 and reduces the possibility of deformation or breakage of the stop 400.

[0040] Therefore, when the push rod 300 slides, the slider 421 and the protrusion 430 are subjected to force along the upper inclined groove 300a and the lower inclined groove 300b respectively, which disperses the force points of the push rod and avoids local stress concentration caused by a single inclined groove. At the same time, when the stop 400 is in the low position, the reaction force transmitted to the push rod 300 is perpendicular to the bottom surface of the push rod 300, and there is no oblique force.

[0041] Preferably, the slope of the upper inclined groove 300a is the same as that of the lower inclined groove 300b, which can reduce the movement error of the stop 400. The other end of the lower inclined groove 300b extends to form a flat groove, and the horizontal sliding between the flat groove and the protrusion 430 can maintain the stop 400 in the stopped state when it is in the high position.

[0042] In one specific embodiment, one end of the upper inclined groove 300a extends to the top of the push rod 300. (See attached image) Figure 2 As shown, the upper inclined groove 300a is set to sink from the top surface of the push rod 300, which retains thickness in the middle of the push rod 300, thereby effectively ensuring the structural strength of the push rod 300 and reducing the risk of the push rod 300 breaking under stress.

[0043] In another specific embodiment, the upper inclined groove 300a is formed in the middle of the push rod 300 (not shown in the figure). In fact, whether the upper inclined groove 300a is at the top or in the middle does not affect the guiding effect on the slider 421.

[0044] In this embodiment, to further adapt the push rod 300 to the stop 400 and strengthen the force-bearing structure of the stop 400, as shown in the attached... Figure 4 and attached Figure 5 As shown, there are two upper inclined grooves 300a, which are mirror-symmetrically arranged on both sides of the push rod 300 along the second horizontal direction; there are two column sections 420, which are spaced apart on the top of the cylindrical section 410, and sliders 421 are respectively provided on the two column sections 420. The two ends of the protrusion 430 are respectively connected to the two column sections 420.

[0045] With attachment Figure 4 Based on the positional relationship in the middle, the protruding rib 430 protrudes upward from the top surface of the cylindrical section 410 and connects the two front and rear column sections 420. The protruding rib 430 not only serves as a sliding guide, but also as a reinforcing rib between the column section 420 and the cylindrical section 410. During assembly, the two column sections 420 respectively restrict the front and rear sides of the push rod 300, and the two sliders 421 are respectively inserted into the front and rear upper inclined grooves 300a. Thus, the two sliders 421 slide in the two upper inclined grooves 300a, and cooperate with the protruding rib 430 to slide in the lower inclined groove 300b. In addition, the cylindrical section 410 guides the rise and fall in the lifting channel, forming a "triple guide" structure, which greatly reduces the vertical error of the stop 400. The stop block 400 only rises and falls in the vertical direction, without horizontal offset or tilt.

[0046] In another embodiment, the sliding part includes an upper inclined groove 300a and a flat groove (not shown) connected to the bottom edge of the upper inclined groove 300a, and the sliding assembly includes a slider 421 disposed on the column section 420.

[0047] In this embodiment, the inclined channel is an upper inclined groove 300a and the horizontal channel is a flat groove. The slider 421 slides from the upper inclined groove 300a into the flat groove, and the stop 400 is in a low position. When the slider 421 slides from the flat groove into the upper inclined groove 300a, the stop is in a high position. The tops of the slider 421, the column section 420, and the cylindrical section 410 form a three-way clamping structure. The connection between the stop 400 and the push rod 300 exists only in the point-to-surface contact between the slider 421 and the sliding part. When the stop 400 is in a low position and is compressed, the stress is concentrated at the slider 421.

[0048] In one embodiment, to achieve motion feedback and positioning of the push rod 300, please refer to the appendix. Figure 6 -Appendix Figure 8 This application also includes two spring pieces 330 and two positioning posts 100a; the two spring pieces 330 are arranged at intervals along a first horizontal direction on the push rod 300 and are mirror-symmetrical with respect to the push rod 300 along the centerline of a second horizontal direction. A cylindrical protrusion 331 is provided on one side surface of the spring piece 330 along the second horizontal direction; the two positioning posts 100a are located inside the housing 100 and are respectively provided corresponding to the two spring pieces 330; wherein, when the push rod 300 slides to either side, one of the spring pieces 330 passes through the positioning post 100a corresponding to it. When the cylindrical protrusion 331 on the spring piece 330 contacts the positioning post 100a, the spring piece 330 elastically deforms. When the cylindrical protrusion 331 on the spring piece 330 leaves the positioning post 100a, the spring piece 330 rebounds in response, and the stop member 400 is in a high or low position.

[0049] The deformation of the spring 300 is achieved by compression in the second horizontal direction through the cylindrical protrusion 331 and the positioning post 100a, without the need for additional auxiliary parts. (See attached diagram) Figure 2 Appendix Figure 3 Appendix Figure 8 Based on the positional relationships shown in the attached figures, the sliding process of push rod 300 is described as follows: When push rod 300 moves to the left, the cylindrical protrusion 331 on the right first contacts the positioning post 100a on the right and is pressed forward. The spring piece 330 on the right deforms accordingly, and push rod 300 produces a stuck feeling. The cylindrical protrusion 331 on the right passes the positioning post 100a on the right and separates from it. The spring piece 330 on the right recovers its deformation and produces a slight sound, indicating that stop 400 has left the low position. Push rod 300 continues to move to the left, and the cylindrical protrusion 331 on the left gradually approaches and contacts the positioning post 100a on the left. The cylindrical protrusion 331 on the left contacts the positioning post 100a on the left and is pressed forward. The spring piece 330 on the left deforms accordingly, and push rod 300 produces a stuck feeling. The cylindrical protrusion 331 on the left passes the positioning post 100a on the left and separates from it. The spring piece 330 on the left recovers its deformation and produces a slight sound, indicating that stop 400 has reached the high position. When push rod 300 moves to the right, its movement is exactly the opposite of that of the two springs 330 on the left and right, which will not be described in detail.

[0050] The slight clicking and sound generated when the spring 330 deforms and returns to its original position can quickly determine whether the stop block 400 has reached the high or low position. At the same time, the spring 330 and the positioning post 100a can form a temporary positioning point. After the stop block 400 reaches the high or low position, if there is no external force pushing the push rod, the interference between the cylindrical protrusion 331 and the positioning post 100a can limit the sliding of the push rod 300, avoid the displacement of the push rod 300 due to vibration or touch, and maintain the stop state.

[0051] In one specific embodiment, please refer to the appendix. Figure 8 The push rod 300 is provided with two grooves 300c, each of which extends in an L-shape from the side of the push rod 300 inward, forming a spring piece 330 between the groove 300c and the side of the push rod 300. Specifically, the groove 300c extends vertically through the push rod 330. Since the spring piece 330 is formed on the push rod 300 by slotting, the structural shape of the push rod 300 is kept intact. The front and rear sides of the spring piece 330 completely overlap with the front and rear sides of the push rod 300, without increasing the number of parts. Furthermore, both the push rod and the stop are modularly designed, with high structural integration, allowing for independent replacement of parts and low maintenance costs.

[0052] In this embodiment, the number of positioning posts 100a is further four, arranged at the four corners of a rectangle, with the four positioning posts 100a distributed in pairs on both sides of the push rod 300 along the second horizontal direction (i.e., attached). Figure 8 The push rod 300 is located on both the front and rear sides. Therefore, regardless of whether the push rod 300 is installed in the forward direction (with the spring 330 facing backward) or the reverse direction (with the spring 330 facing forward), there is a matching positioning post 100a. There is no need to consider the installation direction of the push rod 300, making assembly faster and more convenient.

[0053] In other embodiments, the spring 330 is an independent component that can be detachably mounted on the push rod 300 by means of bolts, pins, slots, etc.

[0054] Please see the appendix Figure 6 -Appendix Figure 8 To limit the maximum stroke of the push rod 300 and prevent structural damage caused by overtravel of the push rod 300, this application also includes two shoulders and two horizontal limiting frames 111. The two shoulders are formed on the push rod 300 and are mirror-symmetrical with respect to the centerline of the push rod 300 in the second horizontal direction. The two horizontal limiting frames 111 are located inside the housing 100 and correspond to the two shoulders respectively. When one of the shoulders abuts against its corresponding horizontal limiting frame 111, the stop member 400 is in a low position or a high position.

[0055] As attached Figure 6 and attached Figure 7 As shown, the push rod 300 includes a straight segment 310 connected by a straight line and button segments 320 at both ends of the straight segment 310. The width of the button segment 320 is greater than the width of the straight segment 310, forming a shoulder. The straight segment 310 passes through the inside of the horizontal limiting frame 111, serving as a sliding guide for the push rod 300 and preventing the push rod 300 from shaking significantly. The button segment 320 increases the contact area with the finger, which is beneficial for the stable pushing of the push rod.

[0056] In practice, the contact between the shoulder and the horizontal limiting frame 111 does not occur earlier than when the stop 400 reaches its high or low position, nor earlier than the moment the spring 330 recovers its deformation, prioritizing the proper positioning of the stop 400. See the appendix for details. Figure 3 and attached Figure 8 For example, when push rod 300 slides to the right, stop 400 rises to its high position. Push rod 300 continues to slide to the right, the right-side spring 330 rebounds in response, and push rod 300 continues to slide to the right, with the left shoulder abutting against the left horizontal limit frame 111, stopping push rod 300. For another example, when push rod 300 slides to the right, stop 400 rises to its high position, and simultaneously the right-side spring 330 rebounds in response, while the left shoulder abuts against the left horizontal limit frame 111, stopping push rod 300. For yet another example, when push rod 300 slides to the right, stop 400 rises to its high position, and push rod 300 continues to slide to the right, the right-side spring 330 rebounds in response, while the left shoulder abuts against the left horizontal limit frame 111.

[0057] See attached document Figure 6 -Appendix Figure 8As a preferred embodiment, the upper inclined groove 300a is distributed on the front and rear sides of the straight section 310, the lower inclined groove 300b runs through the straight section 310 from front to back, and the spring piece 330 is located on the front side of the straight section 310. The above layout ensures that the thickness of the protrusion 430 is the thickest at the contact point between the stop 400 and the straight section 310 when the stop 400 is in the low position, reducing the possibility of deformation or breakage of the push rod 300 due to local stress.

[0058] Please see the appendix Figure 4 Appendix Figure 5 Appendix Figure 8 Appendix Figure 9 Appendix Figure 10 In this application, the outer casing 100 includes an upper casing 110, a lower casing 120, and a central hole 121; the lower casing 120 is detachably connected to the upper casing 110 and forms a switch channel 100b along a first horizontal direction, and the push rod 300 passes through the switch channel 100b; the central hole 121 is located at the center of the bottom of the lower casing 120, and the stop member 400 passes through the central hole 121.

[0059] The lifting channel is specifically the central hole 121, so the stop 400 is located at the center of the housing 100, and the rolling element 200 is arranged around the stop 400. The outer shell 100 is formed by the upper and lower detachable and detachable housings. The push rod 300 is placed at the corresponding switch channel 100b. The stop 400 is inserted into the central hole 121 from bottom to top. After the slider 421 enters the upper inclined groove 300a to achieve the connection between the two, the upper housing 110 and the lower housing 120 are fastened together to complete the assembly.

[0060] In one specific embodiment, as shown in the appendix Figure 8 As shown, a vertical guide frame 115 is provided in the middle of the upper housing 110, corresponding to the central hole 121. The column section 420 of the stop member 400 extends into the vertical guide frame 115. In addition to guiding the movement of the stop member 400 in conjunction with the central hole 121, the vertical guide frame 115 also confines the column section 420 between the inner wall of the vertical guide frame 115 and the outer wall of the push rod 300. Therefore, it can prevent the column section 420 from being damaged or broken due to excessive deformation under pressure, effectively improving operational safety and extending service life.

[0061] Please see the appendix Figure 4 Appendix Figure 5 Appendix Figure 8 Appendix Figure 9 Appendix Figure 10In one embodiment, the rolling element 200 is a ball bearing; to achieve the cooperation between the outer shell 100 and the ball bearing and reduce the overall height of the device, the outer shell 100 further includes a plurality of rolling cavities 112 and a plurality of through holes 122. The plurality of rolling cavities 112 are disposed inside the upper shell 110 for accommodating the ball bearing, and the inner diameter of the rolling cavity 112 is not greater than the diameter of the ball bearing; the plurality of through holes 122 are disposed at the bottom of the lower shell 120, and the ball bearing passes through the through holes, and the diameter of the through holes 122 is smaller than the diameter of the ball bearing.

[0062] When assembling the ball bearings, first place the ball bearings into the through holes 122 respectively, then fasten the upper housing 110 and the lower housing 120 together, with the upper part of the ball bearings hidden in the rolling cavity 112; when the ball bearings roll on the ground, they are subjected to the reaction force of the ground and tend to retract into the rolling cavity 112. At this time, the rolling cavity 112 restricts the relative positional relationship between the ball bearings and the outer housing 100, ensuring the rolling function of the ball bearings.

[0063] In one specific embodiment, as shown in the appendix Figure 8 As shown, the positioning post 100a and the horizontal limiting frame 111 are integrated on the rolling cavity 112 and connected to the outer wall of the rolling cavity 112. The rolling cavity 112 provides lateral support for the positioning post 100a and the horizontal limiting frame 111, which facilitates the injection molding of the upper shell 110, improves the strength of the local structure, and reduces the possibility of the positioning post 100a or the horizontal limiting frame 111 being deformed or damaged by compression.

[0064] In one specific embodiment, as shown in the appendix Figure 9 As shown, a spherical protrusion 116 is provided on the top of the rolling cavity 112. The spherical protrusion 116 reduces the contact area with the ball, which not only reduces friction on the ball but also increases the thickness of the upper housing 110 at the rolling cavity 112. As friction between the ball and the spherical protrusion 116 increases, the spherical protrusion 116 gradually thins, and the ball gradually moves upward relative to the lower housing 120 and approaches the high position of the stop member 400 until it loses its rolling effect. The spherical protrusion 116 effectively extends the service life of the outer casing 100.

[0065] In other embodiments, the rolling element 200 is a swivel wheel or caster, which can rotate relative to the outer casing 100 while rolling on the ground to achieve the swivel function.

[0066] In other embodiments, the rolling cavity 112 is located at the bottom of the lower housing 120, and the ball is directly embedded in the rolling cavity 112.

[0067] Please see the appendix Figure 4 Appendix Figure 5 Appendix Figure 10As a specific detachable connection structure between the upper housing 110 and the lower housing 120, the outer shell 100 also includes a threaded connecting seat 113, a through-hole seat 123, and a bolt 500. The threaded connecting seat 113 is located on the upper housing 110; the through-hole seat 123 is located on the lower housing 120; and the bolt 500 passes through the through-hole seat 123 and is threadedly connected to the threaded connecting seat 113. The upper housing 110 and the lower housing 120 can be separated by disassembling the bolt 500, facilitating the replacement of the internal push rod 300 and the stop 400. When a partial structural break is left inside the outer shell 100, the outer shell 100 can also be opened to remove it, providing convenient maintenance and allowing for repeated disassembly and assembly without affecting the connection strength.

[0068] In this embodiment, to further improve the fit between the upper housing 110 and the lower housing 120 and to enhance the overall strength of the outer shell 100, as shown in the attached... Figure 10 As shown, a step is formed at the top of the through hole seat 123, and the bottom of the threaded connection seat 113 enters and abuts against the step. Through the further cooperation between the through hole seat 123 and the threaded connection seat 113, the support of the upper shell 110 and the lower shell 120 in the middle part of the shell 100 is added on the basis of the original abutment of the outer edges of the upper shell 110 and the lower shell 120, which plays the role of preventing the outer shell 100 from deforming and improving the strength of the outer shell 100.

[0069] As another detachable connection structure between the upper housing 110 and the lower housing 120, an inner and outer groove is formed between the outer edge of the upper housing 110 and the outer edge of the lower housing 120. The outer edge of the upper housing 110 and the lower housing 120 are detachably connected by the interlocking of the grooves.

[0070] As other disassembly connection structures between the upper housing 110 and the lower housing 120, the upper housing 110 and the lower housing 120 are connected by commonly used quick-release structures such as clamps and pins.

[0071] Please see the appendix Figure 2 and attached Figure 3 This application also includes an adhesive part 114 disposed on the top of the outer casing 100; the adhesive part 114 uses common adhesive materials such as 3M adhesive to attach and fix the outer casing 100 to the bottom of furniture such as table legs.

[0072] To further facilitate the installation of adhesive materials and prevent adhesive overflow, in one specific embodiment, an upper positioning groove is recessed on the top surface of the upper housing 110, and a mounting positioning block is embedded in the upper positioning groove. The adhesive part 114 is located on the top surface of the positioning block. The adhesive part 114 can be placed on the positioning block first, and then the positioning block can be embedded into the upper positioning groove using an interference fit, thus preventing the adhesive from the adhesive part 114 from overflowing onto the upper housing 110. For the adhesive application operation during the production process, it is not necessary to position the entire upper housing 110, and there is no need to worry about adhesive overflow. For the assembly operation during the assembly process, the positioning block can be quickly embedded into the upper positioning groove.

[0073] Please see the appendix Figure 2 and attached Figure 3 This application also includes an anti-slip component 440 disposed at the bottom of the stop 400; the anti-slip component 440 is made of wear-resistant materials such as rubber and plastic, and is installed on the bottom surface of the cylindrical section 410, which can increase friction and improve the stopping effect of the stop 400.

[0074] To further facilitate the rapid assembly of the anti-slip component 440 and the cylindrical section 410, and to make it easier to disassemble and replace the anti-slip component 440, a lower positioning groove is provided at the bottom of the cylindrical section 410. The anti-slip component 440 is tightly fitted into the lower positioning groove by its own elasticity. In use, when the stop component 400 is lowered to the low position, the anti-slip component 440 replaces the cylindrical section 410 in contact with the ground. The anti-slip component 440 undergoes elastic deformation, which stabilizes the stop while also reducing the compressive force between the protrusion 430 and the push rod 300.

[0075] Please see the appendix Figure 4 -Appendix Figure 7 This application also includes anti-slip textures respectively provided on the two end faces of the push rod 300 along the first horizontal direction; the anti-slip textures are specifically provided on the surface of the two button segments 320, and their shape is usually a grid pattern, stripe, ripple, etc., which can increase the friction between the fingers and the push rod 300, avoid slipping when pushing, and allow the push rod 300 to be easily operated even when the hands are wet or wearing gloves.

[0076] In addition, please see the appendix. Figure 4 -Appendix Figure 7 Alternatively, a groove 321 can be provided at the bottom of the push rod 300, i.e. the bottom of the button section 320. When the push rod 300 is stuck or difficult to push to one side, the groove 321 on the other side can be used to pull the push rod 300 to assist its movement and help eliminate the sticking phenomenon.

[0077] In summary, this application has the advantages of fewer parts and no vulnerable parts, modular parts with high strength, stable braking, long service life, and low failure risk.

[0078] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A universal rolling device, characterized in that, include: The outer casing (100) has a lifting channel arranged along the vertical direction on its upper surface; Several rolling elements (200) are evenly distributed on the circumference of the bottom center of the housing (100) and are capable of 360° rolling; The push rod (300) slides along a first horizontal direction and passes through the housing (100); The sliding part is provided on the push rod (300) and has an oblique channel arranged at an angle to the first horizontal direction and a horizontal channel arranged along the first horizontal direction; A stop (400) passes through the lifting channel and is slidably connected to the sliding part so that the stop (400) can switch between a high position and a low position; When the push rod (300) moves to one side, the stop (400) slides along the sliding part and descends to a low position along the lifting channel. The stop (400) cooperates with the horizontal channel and contacts the ground at the same time. When the rod (300) moves to the other side, the stop (400) slides along the sliding part and rises to a high position along the lifting channel. The stop (400) cooperates with the inclined channel and leaves the ground at the same time.

2. The universal rolling device as described in claim 1, characterized in that, The stop (400) includes: The cylindrical segment (410) is capable of sliding within the lifting channel; The column section (420) extends upward from the bottom of the cylindrical section (410); A sliding component is disposed on the column section (420) and slidably connected to the sliding part.

3. The omnidirectional rolling device as described in claim 2, characterized in that, The sliding part includes: Upper inclined groove (300a); The lower inclined groove (300b) is arranged vertically at intervals from the upper inclined groove (300a), and one end of it extends to the bottom of the push rod (300). The sliding component includes: A slider (421) is disposed on the column section (420) and slides along the upper inclined groove (300a); A convex rib (430) is provided on the top of the cylindrical section (410) and slides along the bottom surface of the lower inclined groove (300b) or the push rod (300).

4. The universal rolling device as described in any one of claims 1-3, characterized in that, Also includes: Two spring pieces (330) are arranged at intervals on the push rod (300) along the first horizontal direction and are mirror-symmetrical with respect to the push rod (300) along the center line of the second horizontal direction. A cylindrical protrusion (331) is provided on one side surface of the spring piece (330) along the second horizontal direction. Two positioning posts (100a) are located inside the outer shell (100) and are respectively provided corresponding to the two spring pieces (330); In this process, the push rod (300) slides to either side, and one of the spring pieces (330) passes through the corresponding positioning post (100a). When the cylindrical protrusion (331) on the spring piece (330) contacts the positioning post (100a), the spring piece (330) elastically deforms. When the cylindrical protrusion (331) on the spring piece (330) leaves the positioning post (100a), the spring piece (330) rebounds, and the stop (400) is in a high or low position.

5. The universal rolling device as described in claim 4, characterized in that, The push rod (300) is provided with: Two grooves (300c), each of which extends in an L-shape from the side of the push rod (300) toward its interior, such that a spring piece (330) is formed between the groove (300c) and the side of the push rod (300).

6. The universal rolling device as described in any one of claims 1-3, characterized in that, Also includes: Two shoulders are formed on the push rod (300) and are mirror-symmetrical with respect to the centerline of the push rod (300) in the second horizontal direction; Two horizontal limiting frames (111) are located inside the outer shell (100) and correspond to the two shoulder sections respectively; When one of the shoulders abuts against the corresponding horizontal limiting frame (111), the stop (400) is in a low or high position.

7. The universal rolling device as described in any one of claims 1-3, characterized in that, The housing (100) includes: Upper shell (110); The lower housing (120) is detachably connected to the upper housing (110) and forms a switch channel (100b) along a first horizontal direction, through which the push rod (300) passes. A central hole (121) is provided at the center of the bottom of the lower housing (120), and the stop (400) passes through the central hole (121).

8. The universal rolling device as described in claim 7, characterized in that: The rolling element (200) is a ball bearing; The housing (100) also includes: A plurality of rolling cavities (112) are disposed inside the upper housing (110) for accommodating the balls, wherein the inner diameter of the rolling cavity (112) is not greater than the diameter of the balls; A plurality of through holes (122) are provided at the bottom of the lower housing (120), and the ball passes through the through holes (122), the diameter of the through holes (122) being smaller than the diameter of the ball.

9. The universal rolling device as described in claim 7, characterized in that, Also includes: A threaded connector (113) is located on the upper housing (110); A through-hole seat (123) is located on the lower housing (120); A bolt (500) is threaded through the through hole seat (123) and connected to the threaded connection seat (113).

10. The universal rolling device as described in claim 1, characterized in that, Also includes: An adhesive part (114) is provided on the top of the housing (100); and / or, An anti-slip element (440) is disposed at the bottom of the stop (400); and / or, Anti-slip textures are respectively provided on the two end faces of the push rod (300) along the first horizontal direction.

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