A caster

Abstract

This utility model discloses a caster, including a frame, a rotating frame, a wheel, a spring, and a button. The frame has a first anti-rotation part; the rotating frame is rotatably connected to the frame about a first axis. The wheel is rotatably connected to the rotating frame about a second axis perpendicular to the first axis, realizing the rolling of the caster. The spring is rotatably connected to the rotating frame about a third axis perpendicular to the first axis in an unlocked position and a brake position. The spring has a second anti-rotation part, a brake part, and a force-receiving part. The second anti-rotation part and the brake part are located on both sides of the third axis, which can simultaneously realize braking and unlocking at two points. The structure is simple and the operation is convenient. The button is movably connected to the rotating frame. The button has a force-applying part, which is adapted to apply pressure to the force-receiving part to make the spring stop at the brake position, so that the second anti-rotation part and the first anti-rotation part are engaged to prevent rotation, and the brake part abuts against the wheel, thereby realizing braking. The force-applying part is adapted to release the force-receiving part to allow the spring to rotate to the unlocked position, thereby allowing the caster to roll and rotate.

Description

Technical Field

[0001] This utility model relates to the field of gliding products, specifically to a caster. Background Technology

[0002] To achieve versatility, modern casters can now turn in addition to rolling. However, braking requires separate button presses to activate springs for both rolling and turning, which is rather cumbersome. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects or problems existing in the background art or to provide a material basis for overcoming the above-mentioned defects or problems existing in the background art, and to provide a caster.

[0004] To achieve the above objectives, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Option 1, a caster, including

[0006] The frame is equipped with a first anti-rotation part;

[0007] A rotating frame, which is rotatably connected to the frame body about a first axis;

[0008] The wheel body is rotatably connected to the rotating frame about a second axis perpendicular to the first axis;

[0009] A spring sheet is rotatably connected to the rotating frame about a third axis perpendicular to the first axis in an unlocked position and a brake position. It is provided with a second anti-rotation part, a brake part and a force-bearing part, with the second anti-rotation part and the brake part located on both sides of the third axis, respectively.

[0010] A button, movably connected to the rotating frame, is provided with a force-applying part. The force-applying part is adapted to apply pressure to the force-receiving part to stop the spring piece in the braking position, so that the second anti-rotation part and the first anti-rotation part are engaged in anti-rotation cooperation. The braking part abuts against the wheel body and is adapted to release the force-receiving part to allow the spring piece to rotate to the unlocking position, so that the second anti-rotation part and the first anti-rotation part are disengaged, and the braking part is disengaged from the wheel body.

[0011] Option 2, based on Option 1, has a reset foot for the spring piece. The reset foot is adapted to abut against the rotating frame and stores energy when the spring piece rotates toward the braking position. It releases energy when the force-applying part releases the force-receiving part, so that the spring piece rotates back to the unlocked position.

[0012] Option 3, based on Option 2, involves the second axis being eccentric relative to the first axis.

[0013] Option 4, based on Option 3, the frame includes a plug rod, a top cover, and a toothed cover. The plug rod fixes the top cover and the toothed cover. The top cover and the toothed cover are clamped to the rotating frame in a direction parallel to the first axis. A plurality of spheres are provided between the top cover and the rotating frame, the toothed cover and the rotating frame. The toothed cover has a plurality of teeth arranged around the first axis. The teeth form the first anti-rotation part, and the second anti-rotation part is adapted to be inserted into the gap between each of the teeth to cooperate with the teeth in anti-rotation.

[0014] Option 5, based on Option 4, involves two reset feet, positioned on both sides of the wheel body in a direction parallel to the second axis, with the third axis parallel to the second axis.

[0015] Option 6, based on Option 4, further includes an elastic retaining ring. The insertion rod has an annular groove, and the elastic retaining ring is sleeved in the annular groove. The insertion rod is adapted to be inserted into the bracket.

[0016] Option 7, based on Option 2, is that the button is rotatably connected to the rotating frame about a fourth axis perpendicular to the first axis, and the force-applying part is adapted to make the contact point between the force-applying part and the force-receiving part cross the fourth axis when pressure is applied to the force-receiving part.

[0017] Option 8, based on Option 7, has an indicator on the button that prompts for unlocking or braking.

[0018] Option 9, based on Option 1, has a distance from the free end of the force-bearing part to the third axis that is less than the distance from the free end of the second anti-rotation part to the third axis that is less than the distance from the free end of the brake ...

[0019] Option 10, based on Option 1, the wheel body includes a roller, a bearing and a bushing. The roller is provided with a mounting groove. The bearing is placed in the mounting groove and along a direction parallel to the second axis. The bearing is abutted by the bottom of the mounting groove and the bushing. The bushing covers the opening of the mounting groove.

[0020] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0021] 1. In Scheme 1 and its preferred embodiments, a caster includes a frame, a rotating frame, a wheel, a spring, and a button.

[0022] The frame is used to connect with the bracket and install casters. The frame is equipped with a first anti-rotation part;

[0023] The rotating frame is rotatably connected to the frame body around the first axis, and allows the wheels, springs and buttons mounted on it to rotate synchronously around the first axis.

[0024] The wheel body and the rotating frame are rotatably connected around a second axis perpendicular to the first axis, thus enabling the caster to roll.

[0025] The spring plate and rotating frame are rotatably connected to the unlocked and braked positions around a third axis perpendicular to the first axis. The spring plate has a second anti-rotation part, a brake part, and a force-receiving part. The second anti-rotation part and the brake part are located on both sides of the third axis, forming a lever structure. Therefore, one side is raised while the other side is lowered, allowing simultaneous braking and unlocking at two locations. The structure is simpler and the operation is more convenient. A button is used for operation and is movably connected to the rotating frame. The button has a force-applying part, which is suitable for applying pressure to the force-receiving part to stop the spring plate in the brake position, so that the second anti-rotation part engages with the first anti-rotation part to prevent rotation, and the brake part abuts against the wheel body, thereby achieving braking. Since the button can stop the spring plate in the brake position, braking stability is ensured. The force-applying part is suitable for releasing the force-receiving part to allow the spring plate to rotate to the unlocked position, where the second anti-rotation part disengages from the first anti-rotation part, and the brake part disengages from the wheel body, thereby allowing the caster wheel to roll and rotate.

[0026] 2. In Scheme 2 and its preferred embodiments, the spring is provided with a reset foot, which is adapted to abut against the rotating frame and stores energy when the spring rotates to the braking position. When the force-applying part releases the force-receiving part, the spring rotates back to the unlocked position. The spring can be reset without operating the spring, making the operation simpler.

[0027] 3. In Scheme 3 and its preferred embodiments, the second axis is eccentric to the first axis, and during operation, it generates drag to achieve the rotation of the rotating frame.

[0028] 4. In Scheme 4 and its preferred embodiments, the frame includes a plug rod, a top cover, and a toothed cover. The plug rod fixes the top cover and the toothed cover. The top cover and the toothed cover are clamped to the rotating frame in a direction parallel to the first axis to realize the installation of the rotating frame. A number of spheres are provided between the top cover and the rotating frame, and between the toothed cover and the rotating frame to reduce the rotational friction of the rotating frame. The toothed cover is provided with a number of teeth arranged around the first axis. The teeth form a first anti-rotation part, and the second anti-rotation part is adapted to be inserted into the gap between each tooth to cooperate with the anti-rotation part, thereby realizing the braking function.

[0029] 5. In Scheme 5 and its preferred embodiments, when the product is relatively small, the coverage area of ​​the tooth cover is close to the third axis, resulting in a short distance from the center of the spring to the tooth cover, making it difficult to set up the reset feet. By using two reset feet, the reset effect is improved, and they are set on both sides of the wheel body in a direction parallel to the second axis. The third axis is parallel to the second axis, thereby realizing the setting of the reset feet and making its operation more stable.

[0030] 6. In Scheme 6 and its preferred embodiments, an elastic retaining ring is also included. The insert rod is provided with a ring groove, and the elastic retaining ring is sleeved in the ring groove. The insert rod is suitable for insertion into the bracket, and the installation is quick and convenient. The elastic retaining ring automatically extends and locks in place, preventing it from coming loose.

[0031] 7. In Scheme 7 and its preferred embodiments, the button and the rotating frame are rotatably connected around a fourth axis perpendicular to the first axis. The force-applying part is adapted to make the contact point between the force-applying part and the force-receiving part cross the fourth axis when pressure is applied to the force-receiving part, so as to realize the self-locking of the button, thereby preventing the button from resetting under the action of the reset support foot and keeping the spring piece stopped at the brake position.

[0032] 8. In Scheme 8 and its preferred embodiments, the button is provided with an indicator to prompt unlocking or braking, which facilitates user operation.

[0033] 9. In Scheme 9 and its preferred embodiments, the distance from the free end of the force-bearing part to the third axis is less than the distance from the free end of the second anti-rotation part to the third axis, and the distance from the free end of the force-bearing part to the third axis is less than the distance from the free end of the brake part to the third axis, thereby increasing the working stroke feedback and realizing braking in both the rotational and rolling directions.

[0034] 10. In Scheme 10 and its preferred embodiments, the wheel body includes a roller, a bearing, and a bushing. The roller has a mounting groove, and the bearing is placed in the mounting groove along a direction parallel to the second axis. The bearing is installed by the bottom of the mounting groove and the bushing abutting against each other. The bearing arrangement can reduce rolling friction. The bushing covers the opening of the mounting groove, thereby preventing debris and dust from entering the bearing. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a perspective view of a caster in Embodiment 1;

[0037] Figure 2 This is a perspective view of the frame in Example 1;

[0038] Figure 3 This is a schematic diagram of the frame structure of a caster in Embodiment 1;

[0039] Figure 4 This is a perspective view of the rotating frame in Example 1;

[0040] Figure 5This is a schematic diagram of the wheel structure in Example 1;

[0041] Figure 6 This is a 3D view of the buttons in Example 1;

[0042] Figure 7 This is a perspective view of the spring clip in Example 1;

[0043] Figure 8 This is a front view of the spring clip in Example 1;

[0044] Figure 9 This is a schematic diagram of the spring clip in the unlocked position in Embodiment 1;

[0045] Figure 10 This is a schematic diagram of the spring in the braking position in Example 1.

[0046] Explanation of key figure labels:

[0047] 1. Frame; 11. Insert rod; 111. Ring groove; 12. Top cover; 13. Tooth cover; 131. Tooth section;

[0048] 2. Rotating frame; 21. Top wall; 211. Mounting hole; 22. First side wall; 23. Second side wall; 24. Second rotating hole; 25. Third rotating hole; 26. Fourth rotating hole;

[0049] 3. Wheel body; 31. Roller; 311. Mounting groove; 32. Bearing; 33. Bushing;

[0050] 4. Spring clip; 41. Upper bend; 42. Lower bend; 43. Through hole; 44. Second anti-rotation part; 441. Anti-rotation protrusion; 45. Brake part; 451. Protrusion; 46. Force-bearing part; 47. Return support foot;

[0051] 5. Button; 51. Force application part; 6. Ball; 7. Elastic retaining ring;

[0052] 81 First axis; 82 Second axis; 83 Third axis; 84 Fourth axis;

[0053] 91 First Direction; 92 Second Direction; 93 Third Direction; Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0055] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0056] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does 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, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0057] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0058] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0059] Example 1,

[0060] refer to Figures 1-10 A caster includes a frame 1, a rotating frame 2, a wheel 3, a spring 4, a button 5, a ball 6, and an elastic retaining ring 7.

[0061] refer to Figures 1-3 The frame 1 includes a plug rod 11, a top cover 12, and a toothed cover 13. The plug rod 11 extends along a first direction 91 and fixes the top cover 12 and the toothed cover 13. In this embodiment, the plug rod 11 fixes the top cover 12 and the toothed cover 13 by riveting, wherein the first direction 91 is perpendicular to the ground when in use. The plug rod 11 is provided with an annular groove 111, and an elastic retaining ring 7 is sleeved in the annular groove 111. The plug rod 11 is adapted to be inserted into the bracket, and the elastic retaining ring 7 is interference-fitted with the bracket to achieve quick and stable installation. The elastic retaining ring 7 can be a C-shaped ring to facilitate insertion into the annular groove 111.

[0062] The upper cover 12 and the toothed cover 13 are arranged along the first direction 91, with the toothed cover 13 being closer to the ground than the upper cover 12. The upper cover 12 and the toothed cover 13 are arranged along the first direction 91 (e.g. Figure 9The upper cover 12 and the rotating frame 2 are clamped together (in the direction shown), and several spheres 6 are provided between the upper cover 12 and the rotating frame 2, and between the toothed cover 13 and the rotating frame 2. The spheres 6 are suitable for rolling to reduce the rotational friction of the rotating frame 2. The toothed cover 13 is provided with several teeth 131 arranged around the first axis 81. The teeth 131 form the first anti-rotation part. The first axis 81 is parallel to the first direction 91.

[0063] refer to Figure 3 , Figure 4 , Figure 9 The rotating frame 2 is rotatably connected to the frame body 1 around the first axis 81. The rotating frame 2 is provided with a top wall 21, which is held by the top cover 12 and the toothed cover 13. The top wall 21 is provided with a mounting hole 211 extending along the first direction 91 for the insertion rod 11 to pass through. The rotating frame 2 is also provided with a first side wall 22 and a second side wall 23 spaced apart along a second direction 92 perpendicular to the first direction 91. The top ends of the first side wall 22 and the second side wall 23 are connected to the bottom end of the top wall 21. The first side wall 22 and the second side wall 23 are provided with a second rotating hole 24, a third rotating hole 25 and a fourth rotating hole 26 extending along the second direction 92.

[0064] refer to Figure 5 The wheel body 3 is rotatably connected to the second rotating hole 24 of the rotating frame 2 around a second axis 82 perpendicular to the first axis 81. In this embodiment, the second axis 82 is parallel to the second direction 92 and is eccentric relative to the first axis 81, that is, the second axis 82 and the first axis 81 are not on the same plane. In this embodiment, the second axis 82 is on a third direction 93 perpendicular to the first direction 91 and the second direction 92, and there is a distance between it and the first axis 81. Specifically, the wheel body 3 includes a roller 31, a bearing 32 and a bushing 33. The roller 31 is provided with two mounting grooves 311. The bearing 32 is placed in the mounting groove 311 and along the second direction 92. The bearing 32 is abutted by the bottom of the mounting groove 311 and the bushing 33. The bushing 33 is T-shaped and is suitable for covering the opening of the mounting groove 311. After the bolt passes through the second rotating hole 24, the roller 31, the bearing 32 and the bushing 33, it is connected to the nut to fix the wheel body 3 between the first side wall 22 and the second side wall 23 to protect the wheel body 3.

[0065] refer to Figure 1 , Figure 6 Button 5 is movably connected to the rotating bracket 2, such as by rotation or sliding. In this embodiment, button 5 is rotatably connected around a fourth axis 84 perpendicular to the first axis 81, and the fourth axis 84 extends along the second direction 92. A rivet passes through the fourth rotating hole 26 and button 5 and is riveted to the first side wall 22 or the second side wall 23 to achieve the installation of button 5. Button 5 is provided with a force-applying part 51, which is a cam structure. Button 5 is also provided with an indicator indicating unlocking or braking.

[0066] refer to Figures 7-10 The spring piece 4 is located between the first sidewall 22 and the second sidewall 23. The spring piece 4 is rotatably connected to the third rotation hole 25 of the rotating frame 2 around the third axis 83, which is perpendicular to the first axis 81, in the unlocked position and the brake position. The third axis 83 is also parallel to the second direction 92. Specifically, the spring piece 4 has an upper bend 41 and a lower bend 42 in the middle, and a through hole 43 is formed between the upper bend 41 and the lower bend 42. After the rivet passes through the third rotation hole 25 and the through hole 43, it is riveted to the first sidewall 22 or the second sidewall 23 to realize the installation of the spring piece 4.

[0067] The spring 4 is provided with a second anti-rotation part 44, which is connected to the upper bending part 41 and the lower bending part 42 and is located on the side close to the first axis 81. The second anti-rotation part 44 is provided with two upward anti-rotation protrusions 441, which are adapted to be inserted into the gap between each tooth 131 to abut against the tooth 131 and achieve anti-rotation engagement.

[0068] The spring 4 also includes a brake part 45, which is connected to the upper bend 41 and the lower bend 42 and is located on the side away from the first axis 81. The second anti-rotation part 44 and the brake part 45 are located on both sides of the third axis 83, that is, the second anti-rotation part 44, the upper bend 41 (lower bend 42), and the brake part 45 are arranged along the third direction 93. The brake part 45 has a downward protrusion 451 to abut against the wheel body 3, so as to improve the braking effect.

[0069] The spring 4 also has two force-receiving portions 46 extending along a third direction 93, located on both sides of the brake portion 45 along the second direction 92, with the force-receiving portions 46 located closer to the brake portion 45. Along the third direction 93, the distance L2 from the free end of the force-receiving portion 46 to the third axis 83 is less than the distance L1 from the free end of the second anti-rotation portion 44 to the third axis 83, and the distance L2 from the free end of the force-receiving portion 46 to the third axis 83 is less than the distance L3 from the free end of the brake portion 45 to the third axis 83. The force-applying portion 51 is adapted to apply pressure to the force-receiving portion 46 to stop the spring 4 in the braking position. At this time, the second anti-rotation portion 44 engages with the first anti-rotation portion (the anti-rotation protrusion 441 inserts into the gap of the tooth portion 131), the protrusion 451 of the brake portion 45 abuts against the wheel body 3, and is adapted to release the force-receiving portion 46 to allow the spring 4 to rotate to the unlocked position. The force-applying part 51 is adapted to, when applying pressure to the force-receiving part 46, cause the contact point between the force-applying part 51 and the force-receiving part 46 to cross the fourth axis 84 (on the third direction 93, the contact point is located on the side of the fourth axis 84 close to the first axis 81), forming a self-locking angle, so that the button 5 will not bounce back under the action of the reset foot 47.

[0070] The spring plate 4 is also provided with a reset support foot 47 extending along a third direction 93. The reset support foot 47 is adapted to abut against the lower surface of the top wall 21 of the rotating frame 2. There are two reset support feet 47, which are provided on both sides of the wheel body 3 along the second direction 92. The reset support feet 47 are connected to the force receiving parts 46 one by one and extend in a direction away from the force receiving parts 46. When the spring plate 4 rotates to the brake position, the reset support foot 47 is compressed against the lower surface of the top wall 21 to store energy. When the force applying part 51 releases the force receiving part 46, the energy is released, so that the spring plate 4 rotates back to the unlock position and supports the button 5 to prevent the button 5 from falling.

[0071] When using, refer to Figure 10 Pressing one end of button 5 causes the force-applying part 51 to rotate towards the force-receiving part 46. The downward pressure of the force-applying part 51 forces the force-receiving part 46. A distance exists between the contact point between the force-receiving part 46 and the force-applying part 51 and the third axis 83, causing the spring 4 to rotate around the third axis 83 until it reaches the braking position. At this point, the brake part 45 presses down, and the protrusion 451 of the brake part 45 abuts against the wheel body 3, preventing the wheel body 3 from rotating around the second axis 82. The anti-rotation protrusion 441 rises and inserts into the gap of the toothed part 131, preventing the rotating frame 2 from rotating around the first axis 81. The reset foot 47 rises and presses against the lower surface of the top wall 21, compressing and storing energy. Simultaneously, the contact point between the force-applying part 51 and the force-receiving part 46 crosses the fourth axis 84, forming a self-locking angle, thus preventing button 5 from rebounding under the action of the reset foot 47.

[0072] refer to Figure 9 Pressing the other end of button 5 causes the force-applying part 51 to rotate away from the force-receiving part 46, and the force-receiving part 46 is no longer under pressure. The spring 4 releases energy under the action of the reset support 47, thereby rotating to the unlock position. The brake part 45 disengages from the wheel body 3, and the anti-rotation protrusion 441 exits the gap, allowing the rotating frame 2 and the wheel body 3 to rotate.

[0073] Because the second axis 82 is eccentric to the first axis 81, the wheel 3 is dragged during operation, causing the rotating frame 2 to rotate, thereby achieving steering.

[0074] Compared with the prior art, this embodiment has the following beneficial effects:

[0075] In one exemplary embodiment, a caster includes a frame 1, a rotating frame 2, a wheel 3, a spring 4, and a button 5.

[0076] The frame 1 is used to connect with the bracket to install the casters. The frame 1 is provided with a first anti-rotation part;

[0077] The rotating frame 2 is rotatably connected to the frame 1 around the first axis 81, and allows the wheel 3, spring 4 and button 5 mounted on it to rotate synchronously around the first axis 81.

[0078] The wheel body 3 and the rotating frame 2 are rotatably connected around a second axis 82 perpendicular to the first axis 81, so as to realize the rolling of the caster.

[0079] The spring plate 4 and the rotating frame 2 are rotatably connected around a third axis 83 perpendicular to the first axis 81 to the unlocking position and the braking position. The spring plate 4 is provided with a second anti-rotation part 44, a braking part 45 and a force-receiving part 46. The second anti-rotation part 44 and the braking part 45 are located on both sides of the third axis 83, forming a lever structure. Therefore, one side is raised and the other side is lowered, which can simultaneously achieve braking and unlocking at two points. The structure is simpler and the operation is more convenient. The button 5 is used for operation. The button 5 is movably connected to the rotating frame 2. The button 5 is provided with a force-applying part 51. The force-applying part 51 is suitable for applying pressure to the force-receiving part 46 to make the spring plate 4 stop at the braking position, so that the second anti-rotation part 44 and the first anti-rotation part are engaged to prevent rotation. The braking part 45 abuts against the wheel body 3, thereby achieving braking. Since the button 5 can make the spring plate 4 stop at the braking position, the braking stability is ensured. The force-applying part 51 is adapted to release the force-receiving part 46 to allow the spring piece 4 to rotate to the unlocked position, the second anti-rotation part 44 disengages from the first anti-rotation part, and the brake part 45 disengages from the wheel body 3, thereby allowing the caster to roll and rotate.

[0080] In one exemplary embodiment, the spring 4 is provided with a reset foot 47, which is adapted to abut against the rotating frame 2 and stores energy when the spring 4 rotates toward the brake position. When the force-applying part 51 releases the force-receiving part 46, the spring 4 rotates back to the unlocked position. The reset of the spring 4 can be achieved without operating the spring 4, making the operation simpler.

[0081] In one exemplary embodiment, the second axis 82 is eccentric relative to the first axis 81, and during operation, it generates drag to achieve the steering of the rotating frame 2.

[0082] In one exemplary embodiment, the frame 1 includes a plug rod 11, an upper cover 12, and a toothed cover 13. The plug rod 11 fixes the upper cover 12 and the toothed cover 13. The upper cover 12 and the toothed cover 13 are clamped to the rotating frame 2 in a direction parallel to the first axis 81 to realize the installation of the rotating frame 2. A plurality of spheres 6 are provided between the upper cover 12 and the rotating frame 2, and between the toothed cover 13 and the rotating frame 2 to reduce the rotational friction of the rotating frame 2. The toothed cover 13 is provided with a plurality of teeth 131 arranged around the first axis 81. The teeth 131 form a first anti-rotation part, and a second anti-rotation part 44 is adapted to be inserted into the gap between each tooth 131 to cooperate with the teeth 131 to prevent rotation, thereby realizing the braking function.

[0083] In one exemplary embodiment, when the product is relatively small, the coverage area of ​​the tooth cover 13 is close to the third axis 83, resulting in a short distance from the center of the spring 4 to the tooth cover 13, making it difficult to set up the reset support 47. By using two reset supports 47, the reset effect is improved, and they are arranged on both sides of the wheel body 3 in a direction parallel to the second axis 82. The third axis 83 is parallel to the second axis 82, thereby setting up the reset supports 47 and making its operation more stable.

[0084] In one exemplary embodiment, it also includes an elastic retaining ring 7. The insertion rod 11 is provided with an annular groove 111. The elastic retaining ring 7 is sleeved in the annular groove 111. The insertion rod 11 is adapted to be inserted into the bracket. The installation is quick and convenient. The elastic retaining ring 7 automatically extends and locks in place, preventing it from coming loose.

[0085] In one exemplary embodiment, button 5 and rotating frame 2 are rotatably connected about a fourth axis 84 perpendicular to the first axis 81. The force-applying part 51 is adapted to make the contact point between the force-applying part 51 and the force-receiving part 46 cross the fourth axis 84 when pressure is applied to the force-receiving part 46, so as to realize the self-locking of button 5, thereby preventing button 5 from resetting under the action of reset foot 47 and keeping spring piece 4 stopped at the brake position.

[0086] In one exemplary embodiment, button 5 is provided with an indicator to prompt unlocking or braking, making it convenient for the user to operate.

[0087] In one exemplary embodiment, the distance L2 from the free end of the force-receiving part 46 to the third axis 83 is less than the distance L1 from the free end of the second anti-rotation part 44 to the third axis 83, and the distance L2 from the free end of the force-receiving part 46 to the third axis 83 is less than the distance L3 from the free end of the brake part 45 to the third axis 83, thereby increasing the feedback of the working stroke and realizing braking in both the rotational and rolling directions.

[0088] In one exemplary embodiment, the wheel body 3 includes a roller 31, a bearing 32, and a bushing 33. The roller 31 has a mounting groove 311, and the bearing 32 is placed in the mounting groove 311 along a direction parallel to the second axis 82. The bearing 32 is mounted by the bottom of the mounting groove 311 and the bushing 33 abutting against each other. The bearing 32 reduces rolling friction. The bushing 33 covers the opening of the mounting groove 311, thereby preventing debris and dust from entering the bearing 32.

[0089] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A caster characterized by: include The frame (1) is provided with a first anti-rotation part; Rotating frame (2), which is rotatably connected to the frame body (1) about the first axis (81); The wheel body (3) is rotatably connected to the rotating frame (2) about a second axis (82) perpendicular to the first axis (81); The spring (4) is rotatably connected to the rotating frame (2) about a third axis (83) perpendicular to the first axis (81) in the unlock position and the brake position. It is provided with a second anti-rotation part (44), a brake part (45) and a force-bearing part (46). The second anti-rotation part (44) and the brake part (45) are located on both sides of the third axis (83). Button (5), which is movably connected to the rotating frame (2), is provided with a force-applying part (51). The force-applying part (51) is adapted to apply pressure to the force-receiving part (46) so that the spring piece (4) stops at the brake position, so that the second anti-rotation part (44) is engaged with the first anti-rotation part, the brake part (45) abuts against the wheel body (3), and is adapted to release the force-receiving part (46) so that the spring piece (4) can rotate to the unlock position, so that the second anti-rotation part (44) is disengaged from the first anti-rotation part, and the brake part (45) is disengaged from the wheel body (3).

2. A caster according to claim 1, wherein: The spring (4) is provided with a reset foot (47), which is adapted to abut against the rotating frame (2) and stores energy when the spring (4) rotates to the brake position, and releases energy when the force-applying part (51) releases the force-receiving part (46) so that the spring (4) rotates back to the unlocked position.

3. A caster according to claim 2, wherein: The second axis (82) is eccentric relative to the first axis (81).

4. A caster according to claim 3, wherein: The frame (1) includes a plug (11), a top cover (12), and a toothed cover (13). The plug (11) fixes the top cover (12) and the toothed cover (13). The top cover (12) and the toothed cover (13) are clamped in the rotating frame (2) in a direction parallel to the first axis (81). A plurality of spheres (6) are provided between the top cover (12) and the rotating frame (2), the toothed cover (13) and the rotating frame (2). The toothed cover (13) is provided with a plurality of teeth (131) arranged around the first axis (81). The teeth (131) form the first anti-rotation part. The second anti-rotation part (44) is adapted to be inserted into the gap between each of the teeth (131) to engage with the teeth (131) to prevent rotation.

5. A caster according to claim 4 wherein: The number of reset feet (47) is two, and they are arranged on both sides of the wheel body (3) in a direction parallel to the second axis (82); the third axis (83) is parallel to the second axis (82).

6. A caster according to claim 4 wherein: It also includes an elastic retaining ring (7), the insert rod (11) is provided with an annular groove (111), the elastic retaining ring (7) is sleeved in the annular groove (111), and the insert rod (11) is adapted to be inserted into the bracket.

7. A caster according to claim 2, wherein: The button (5) is rotatably connected to the rotating frame (2) about a fourth axis (84) perpendicular to the first axis (81). The force-applying part (51) is adapted to make the contact point between the force-applying part (51) and the force-receiving part (46) cross the fourth axis (84) when pressure is applied to the force-receiving part (46).

8. A caster according to claim 7, wherein: The button (5) is marked with a prompt to unlock or brake.

9. A caster according to claim 1, wherein: The distance from the free end of the force-receiving part (46) to the third axis (83) is less than the distance from the free end of the second anti-rotation part (44) to the third axis (83), and the distance from the free end of the force-receiving part (46) to the third axis (83) is less than the distance from the free end of the brake part (45) to the third axis (83).

10. A caster according to claim 1, wherein: The wheel body (3) includes a roller (31), a bearing (32) and a bushing (33). The roller (31) is provided with a mounting groove (311). The bearing (32) is placed in the mounting groove (311) and along a direction parallel to the second axis (82). The bearing (32) is abutted by the bottom of the mounting groove (311) and the bushing (33). The bushing (33) covers the opening of the mounting groove (311).

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