Swivel spindle and consumable placement device

Abstract

This utility model discloses a rotating shaft and a filament placement device, relating to the field of 3D printing technology. The rotating shaft includes a fixed component, a rotating component, and an elastic component. At least a portion of the rotating component is sleeved within the fixed component, and the rotating component is rotatable relative to the fixed component. The elastic component is disposed between the fixed component and the rotating component, with one end connected to the rotating component and the other end abutting against the fixed component. When the rotating component rotates relative to the fixed component, it drives the elastic component to move, causing the elastic component to deform. The technical solution provided by this utility model aims to enable the rotating shaft to rotate automatically, so that the returned filament can be wound onto the material tray, and the filament can maintain tension.

Description

Technical Field

[0001] This utility model relates to the field of consumables placement technology, and in particular to a rotary shaft and a consumables placement device. Background Technology

[0002] A 3D printer is a rapid prototyping process. Currently, 3D printers use an extruder to supply a thermoplastic filament to a nozzle, which is then heated to a molten state within the nozzle. The nozzle then moves along the printer's printing path, extruding the molten material onto the printing plate to print a three-dimensional object layer by layer.

[0003] In this process, consumables are typically rolled up and placed on a feed tray before feeding. The feed tray is fitted onto a rotating shaft of a feed tray frame. When the consumables are pulled into the feed by the extruder, the feed tray rotates along with the consumables, driving the shaft to rotate as well. However, when the consumables are ejected from the extruder, the feed tray loses power and stops rotating. This causes the consumables on the feed tray to lose tension and loosen. The ejected consumables cannot be tightly wound onto the feed tray and may even become entangled outside the feed tray, thus affecting subsequent feeding. Utility Model Content

[0004] The main purpose of this invention is to provide a rotating shaft and a consumable placement device, which enables the shaft to rotate automatically so that the returned consumables can be wound on the tray and the consumables can maintain tension.

[0005] To achieve the above objectives, this utility model proposes a rotary shaft, which includes:

[0006] Fasteners;

[0007] A rotating member, at least a portion of which is sleeved within the fixed member, the rotating member being rotatable relative to the fixed member; and

[0008] An elastic element is provided between the fixed element and the rotating element, one end of the elastic element is connected to the rotating element, and the other end of the elastic element abuts against the fixed element;

[0009] When the rotating member rotates relative to the fixed member, the rotating member drives the elastic member to move, and the elastic member deforms.

[0010] In one embodiment, the inner wall surface of the fixing member is provided with an annular groove, and the annular groove is arranged in a ring along the rotation direction of the rotating member;

[0011] The bottom of the annular groove forms an abutment surface, and the other end of the elastic member abuts against the abutment surface. The annular groove has a wavy profile in a cross section perpendicular to the central axis of the rotating member.

[0012] In one embodiment, the wave shape is composed of alternating troughs and crests.

[0013] In one embodiment, the trough is flared and includes a first sidewall and a second sidewall disposed opposite to each other, wherein the inclination angle of the first sidewall is greater than the inclination angle of the second sidewall.

[0014] In one embodiment, the inner wall of the trough has a smooth transition.

[0015] In one embodiment, the rotating member is provided with a rotating shaft, and the fixed member is provided with a shaft hole. The rotating shaft passes through the shaft hole and rotates with the shaft hole, so that the fixed member and the rotating member are rotatably connected.

[0016] In one embodiment, the rotating shaft includes a shaft body and a fitting. The shaft body is connected to the rotating member, the fitting is sleeved on the shaft body, the fitting has a limiting groove, one end of the elastic member is limited in the limiting groove, and the wall surface of the shaft hole has the abutment surface.

[0017] In one embodiment, the fixing member and the elastic member comprise two sets, with the two sets of fixing members and the elastic members respectively disposed at both ends of the rotating member.

[0018] In one embodiment, the elastic element is a clockwork spring or a torsion spring.

[0019] This utility model also proposes a consumables placement device, the consumables placement device comprising:

[0020] main body;

[0021] As described above, the rotating shaft is fixed to the main body.

[0022] The technical solution of this utility model achieves the rotation function of the rotating component by placing an elastic element between the fixed component and the rotating component. The rotating component is used to hold the tray carrying the consumable roll and is at least partially sleeved inside the fixed component, so that the rotating component can rotate relative to the fixed component to unwind. One end of the elastic element is connected to the rotating component, and the other end of the elastic element abuts against the fixed component. When the rotating component rotates forward relative to the fixed component to unwind, the elastic element moves with the rotating component and deforms due to the resistance of the fixed component until the elastic element deforms to a certain extent, and the elastic force overcomes the resistance of the abutment surface. In this way, the elastic element maintains its deformed state and rotates with the rotating component, and the consumable is unwound normally. During this process, the elastic element maintains its elastic potential energy. When the extruder ejects material, the consumable no longer drives the rotating component to rotate forward. The elastic element releases its elastic potential energy and drives the rotating component to rotate in the opposite direction, realizing automatic tensioning of the consumable and avoiding the problem of material entanglement caused by excessive looseness, which would affect the next feeding. Attached Figure Description

[0023] 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 the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of the rotating shaft in one embodiment of this utility model;

[0025] Figure 2 An exploded view of the rotating shaft in one embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the rotating shaft with the end cap removed in one embodiment of the present invention.

[0027] Explanation of icon numbers:

[0028] 100. Rotary shaft; 1. Fixing component; 11. Housing; 111. Shaft hole; 1111. Receiving groove; 1112. Through hole; 12. End cap; 13. Annular groove; 131. Valley; 1311. First sidewall; 1312. Second sidewall; 132. Peak; 133. Abutment surface; 2. Rotating component; 21. Shaft; 211. Shaft body; 212. Kit; 2121. Limiting groove; 3. Elastic component; 31. First end; 32. Second end.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] 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 only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] Please refer to the reference. Figures 1 to 3 As shown, this utility model proposes a rotary shaft 100, which includes a fixed member 1, a rotating member 2, and an elastic member 3. At least part of the rotating member 2 is sleeved inside the fixed member 1, and the rotating member 2 can rotate relative to the fixed member 1. The elastic member 3 is disposed between the fixed member 1 and the rotating member 2, with one end of the elastic member 3 connected to the rotating member 2 and the other end of the elastic member 3 abutting against the fixed member 1. When the rotating member 2 rotates relative to the fixed member 1, the rotating member 2 drives the elastic member 3 to move, and the elastic member 3 deforms.

[0034] In this embodiment, the rotating member 2 is used to hold the tray containing the consumable roll and is at least partially fitted inside the fixed member 1 so that the rotating member can rotate relative to the fixed member 1 to unwind. When the extruder pulls the consumable feed, the consumable drives the rotating member 2 to rotate relative to the fixed member 1 for unwinding. The elastic member 3 is disposed between the fixed member 1 and the rotating member 2; when the rotating member 2 rotates clockwise relative to the fixed member 1 to unwind, the rotating member 2 drives the elastic member 3 to rotate. Since the elastic element 3 abuts against the fixed element 1, when the elastic element 3 rotates and follows the rotating element 2, the elastic element 3 will be deformed by the resistance of the fixed element 1 until the elastic element 3 is deformed to a certain extent and can overcome the resistance of the fixed element 1. In this way, the elastic element 3 maintains its deformed state and rotates with the rotating element 2, and the consumable is unwound normally. During this process, the elastic element 3 maintains its elastic potential energy. When the extruder retracts the material, the consumable no longer drives the rotating element 2 to rotate in the forward direction. The elastic element 3 will release its elastic potential energy and cause the first end 31 to drive the rotating element 2 to rotate in the reverse direction, thereby realizing the automatic tensioning of the consumable and avoiding the problem of material entanglement caused by the consumable being too loose, which would affect the next feeding.

[0035] Optionally, the fixing member 1 and the rotating member 2 are coaxially arranged. The fixing member 1 may be sleeve-shaped and may be sleeved on the rotating member 2, or the rotating member 2 may be sleeve-shaped and may be sleeved on the fixing member 1.

[0036] In actual implementation, the elastic element 3 includes a first end 31 and a second end 32. The first end 31 is connected to the rotating element 2, and the second end 32 abuts against the fixed element 1. When the rotating element 2 starts to drive the elastic element 3 to move, the first end 31 moves with the rotating element 2, and the second end 32 is resisted by the fixed element 1, causing the elastic element 3 to undergo elastic deformation until the second end 32 also begins to move relative to the fixed element 1. At this time, the elastic element 3 maintains its elastic potential energy and follows the rotation of the rotating element 2.

[0037] In this embodiment, the forward rotation direction of the rotating component 2 is as follows: Figure 3 The X-direction arrow in the diagram is shown.

[0038] In one embodiment of this utility model, such as Figures 1 to 3 As shown, the inner wall of the fixing member 1 is provided with an annular groove 13, which is arranged in an annular shape along the rotation direction of the rotating member 2; the bottom of the annular groove 13 forms an abutment surface 133, and the other end of the elastic member 3 abuts against the abutment surface 133. The contour of the annular groove 13 in the section perpendicular to the central axis of the rotating member 2 is wavy.

[0039] In this embodiment, when the rotating member 2 rotates relative to the fixed member 1, the other end of the elastic member 3 always abuts against the abutment surface 133. Since the annular groove 13 is annularly arranged along the rotation direction of the rotating member 2, and the abutment surface 133 is also annularly arranged, the elastic member 3 can always abut against the abutment surface 133 during the rotation of the rotating member 2. Optionally, the abutment surface 133 is coaxially arranged with the rotation axis of the rotating member 2. During the rotation of the rotating member 2, the wavy annular groove 13 provides resistance to the elastic member 3, so that the elastic member 3 maintains its elastic potential energy during rotation.

[0040] Specifically, the second end 32 of the elastic element 3 abuts against the bottom of the annular groove 13. Since the annular groove 13 is wavy in the rotation direction of the rotating element 2, it naturally forms a depression and a protrusion. The depression is recessed towards the central axis of the rotating element 2, and the protrusion is protruded in a direction away from the central axis of the rotating element 2. In the initial state of the rotating shaft 100, the second end 32 of the elastic element 3 can be located in the depression. When the rotating element 2 drives the elastic element 3 to rotate, the second end 32 needs to overcome the resistance given by the side wall of the depression and needs to slide around the protrusion adjacent to the depression in order to rotate with the first end 31. Therefore, in the initial stage when the rotating component 2 drives the first end 31 to rotate, the second end 32 will remain in place. The distance between the first end 31 and the second end 32 will change, that is, the elastic component 3 will deform and accumulate elastic potential energy. When the elastic force of the elastic component 3 can overcome the resistance given to the second end 32 by the annular groove 13, the second end 32 will be driven to move along the contact surface 133. During this process, the elastic component 3 will accumulate a certain amount of elastic potential energy. Afterwards, as the consumables are fed, the elastic component 3 maintains its elastic potential energy and rotates with the rotating component 2.

[0041] In this embodiment, the elastic element 3 is a spring-loaded coiled spring. The first end 31 of the elastic element 3 is the inner end of the spring-loaded spring, and the second end 32 is the outer end of the spring-loaded spring. When the rotating element 2 starts to drive the spring-loaded spring to rotate, the second end 32 is engaged in the recess and rotates relative to the first end 31 as the rotating element 2 rotates. The spring-loaded spring is compressed and accumulates elastic potential energy. When the elastic potential energy accumulates to a certain level, the second end 32 of the spring-loaded spring begins to move towards the convex side, the diameter of the spring-loaded spring decreases, and it can slide out of the recess and rotate with the rotating element 2. When the rotating element 2 stops unwinding and rotating, the second end 32 of the spring-loaded spring is engaged in the recess under the action of elastic potential energy. At this time, the spring-loaded spring rebounds, the second end 32 remains stationary, and the first end 31 drives the rotating element 3 to rotate in the opposite direction, thereby achieving tensioning of the consumable.

[0042] In some embodiments, the elastic element 3 may also be a tension spring, a compression spring, or a coil spring, etc.

[0043] Optionally, the annular groove 13 can be provided on the inner or outer wall surface of the fixing member 1. In this embodiment, a portion of the fixing member 1 is hollow to accommodate a portion of the rotating member 2, and the inner wall surface is provided with the annular groove 13.

[0044] In actual implementation, the first end 31 of the elastic element 3 can be installed on the rotating element 2 by means of screws or clips. The second end 32 of the elastic element 3 is abutted against the abutting surface 133. Optionally, after the elastic element 3 is installed in place, it can be in a deformed state to ensure the abutting stability of the second end 32 of the elastic element 3 against the abutting surface 133.

[0045] In one embodiment of this utility model, the wave shape is formed by alternating continuous troughs 131 and crests 132.

[0046] In this embodiment, the trough 131 is recessed relative to the crest 132, that is, the crest 132 is protruding relative to the trough 131.

[0047] Understandably, when the second end 32 of the elastic element 3 moves along the abutment surface 133, the second end 32 is subjected to the supporting force and frictional force of the abutment surface 133. In this application, during the deformation process, the elastic element 3 mainly deforms along the rotation axis of the rotating element 2, that is, in the circumferential direction of the rotation of the rotating element 2. The rotational function of the elastic element 3 on the rotating element 2 mainly depends on the deformation of the elastic element 3 in the circumferential direction of the rotation of the rotating element 2.

[0048] Specifically, taking the first end 31 of the elastic element 3 connected to the rotating element 2 and the abutment surface 133 set on the fixed element 1 as an example, when the initial position of the second end 32 is located in the trough 131, as the rotating element 2 rotates, the second end 32 is subjected to the support force and friction force of the side wall of the trough 131. The direction of the support force given to the second end 32 by the side wall of the trough 131 is approximately tangent to the rotation circumference. Therefore, the elastic element 3 will deform along the rotation circumference of the rotating element 2 as the rotating element 2 moves, and at the same time, it will deform perpendicular to the rotation circumference of the rotating element 2 under the action of friction force, so that the second end 32 moves closer to the first end 31 until the second end 32 slides along the trough 131 to follow the rotation of the rotating element 2. During this process, the elastic element 3 will maintain the deformed state. When the extruder retracts the material, the rotating part 2 stops rotating. Under the action of the elastic force of the elastic part 3, the second end 32 will fall into the trough 131. Under the action of the supporting force and frictional resistance, the trough 131 is stationary relative to the fixed part 1. As the elastic part 3 continues to rebound, the first end 31 drives the rotating part 2 to rotate.

[0049] Understandably, the elastic element 3 experiences greater resistance to movement when it is located at the trough 131 and less resistance when it is located at the crest 132. If the initial position of the second end 32 is at the crest 132, the second end 32 will move relative to the contact surface 133 during the initial stage of the rotation of the rotating element 2 because the resistance to movement is small, until the second end 32 falls into the trough 131 and accumulates elastic potential energy in the trough 131.

[0050] In actual implementation, the tail end of the trough 131 is connected to the head end of the crest 132, and the head end of the trough 131 is connected to the tail end of the crest 132, thus forming a closed annular contact surface 133. The second end 32 can move continuously on the contact surface 133 as the rotating part 2 rotates.

[0051] Optionally, the troughs 131 and peaks 132 are set as irregular spline curves along the setting direction.

[0052] In one embodiment of this utility model, such as Figure 3 As shown, the troughs 131 and peaks 132 include multiple sets, and the multiple sets of troughs 131 and peaks 132 are connected end to end in sequence.

[0053] In this embodiment, the first end of one set of troughs 131 is connected to the last end of another set of crests 132, the last end of the first end 31 is connected to the first end of the same set of crests 132, and the last end of the crests 132 is connected to the first end of another set of troughs 131. Thus, during the rotation of the rotating member 2, the frequency at which the second end 32 passes through the troughs 131 and crests 132 increases. It is understandable that the more sets of troughs 131 and crests 132 there are, the more uniform the resistance experienced by the second end 32 of the elastic member 3 when moving relative to the abutment surface 133, and the more stable the movement of the second end 32 along the abutment surface 133, thus increasing the smooth unwinding capability of the rotating member 2.

[0054] In actual implementation, troughs 131 and peaks 132 can include two, three, four, six, eight, etc.

[0055] In one embodiment of this utility model, such as Figure 3 As shown, the trough 131 is flared and includes a first sidewall 1311 and a second sidewall 1312 that are disposed opposite to each other. The inclination angle of the first sidewall 1311 is greater than the inclination angle of the second sidewall 1312.

[0056] In this embodiment, the flared trough 131 facilitates the entry and exit of the crest 132 into or from the trough 131, allowing the second end 32 to move more smoothly along the contact surface 133, preventing the rotation of the rotating member 2 from becoming stuck and affecting the feeding effect of the consumable. During consumable feeding, the rotating member 2 drives the second end 32 to move along the second sidewall 1312 towards the first sidewall 1311. The second end 32 leaves the trough 131 from the first sidewall 1311 and enters the crest 132 from the second sidewall 1312. The inclination angle of the first sidewall 1311 is greater than that of the second sidewall 1312, thus generating sufficient resistance for the second end 32 as it leaves the first end 31. This allows the elastic member 3 to accumulate a certain amount of elastic potential energy before moving along the contact surface 133. Simultaneously, this makes the transition between the second sidewall 1312 and the crest 132 smoother, improving the stability of the rotating member 2 during rotation.

[0057] In one embodiment of this utility model, such as Figure 3 As shown, the inner wall of the trough 131 has a smooth transition. This reduces the frictional force when the second end 32 moves along the trough 131, so as to keep the movement resistance of the elastic element 3 within a reasonable range. This avoids excessive movement resistance on the second end 32, which could cause the movement of the rotating element 2 to become stuck and affect the normal unwinding of the consumable.

[0058] Optionally, the second end 32 of the elastic member 3 may be bent so that the second end 32 abuts against the abutting surface 133 with a smooth surface.

[0059] In one embodiment of this utility model, such as Figures 1 to 3As shown, the rotating component 2 is provided with a rotating shaft 21, and the fixed component 1 is provided with a shaft hole 111. The rotating shaft 21 passes through the shaft hole 111 and rotates with the shaft hole 111, so that the fixed component 1 and the rotating component 2 are rotatably connected.

[0060] In this embodiment, the fixed member 1 and the rotating member 2 are rotatably connected by the cooperation of the rotating shaft 21 and the shaft hole 111. The rotating shaft 21 can be set on the rotating member 2 or on the fixed member 1, and no specific limitation is made here.

[0061] Optionally, a bearing is provided between the rotating shaft 21 and the shaft hole 111 to reduce the rotational resistance of the rotating part 2 and improve the smoothness of rotation.

[0062] In some embodiments, the rotating member 2 is arranged in a cylindrical or columnar shape, the rotating shaft 21 is disposed on the end face of the rotating member 2, and the fixing member 1 is provided with a shaft hole 111 and is sleeved on the rotating shaft 21 through the shaft hole 111.

[0063] In one embodiment of this utility model, such as Figure 2 and Figure 3 As shown, the rotating shaft 21 includes a shaft body 211 and a fitting 212. The shaft body 211 is connected to the rotating member 2, and the fitting 212 is sleeved on the shaft body 211. The fitting 212 is provided with a limiting groove 2121. One end of the elastic member 3 is limited in the limiting groove 2121, and the wall surface of the shaft hole 111 is provided with an abutment surface 133.

[0064] In this embodiment, the rotating shaft 21 includes a shaft body 211 and a kit 212 manufactured separately. A limiting groove 2121 is formed on the kit 212, and the first end 31 of the elastic member 3 is limited in the limiting groove 2121 of the kit 212 to achieve a detachable connection of the elastic member 3. This avoids directly slotting the shaft body 211, reducing the difficulty of slotting the limiting groove 2121, and thus reducing the manufacturing difficulty of the rotating shaft 100.

[0065] Understandably, the limiting groove 2121 is set on the peripheral wall of the kit 212, and the wall surface of the shaft hole 111 is provided with an abutment surface 133 so that the installation position of the first end 31 of the elastic element 3 is set opposite to the abutment surface 133, thereby reducing the difficulty of setting the elastic element 3. The elastic element 3 can deform more directly along the rotation circumferential direction, avoiding excessive deformation of the elastic element 3 in other directions, which would affect the stability of the rotation function of the rotary shaft 100.

[0066] Optionally, the shaft 211 can be integrally formed with the rotating component 2. The kit 212 is provided with a through hole for the shaft 211 to pass through. The kit 212 can be interference-fitted with the shaft 211, or the cross-sectional shape and size of the through hole and the shaft 211 can be set to correspond, and the cross-section of the through hole and the shaft 211 is not circular, so as to avoid relative rotation between the kit 212 and the shaft 211.

[0067] Alternatively, the limiting groove 2121 can also be directly set on the shaft 211 to directly connect the first end 31 to the shaft 211.

[0068] In some embodiments, the fixing member 1 includes a housing 11 and an end cap 12. The housing 11 is provided with a receiving groove 1111 and a through hole 1112 communicating with the receiving groove 1111. The rotating shaft 21 extends into the receiving groove 1111 through the through hole 1112. The receiving groove 1111 and the through hole 1112 together form a shaft hole 111. The size of the through hole 1112 is the same as the size of the rotating shaft 21, so that the rotating shaft 21 plays a certain limiting role for the fixing member 1. The groove wall of the receiving groove 1111 forms an abutment surface 133. The elastic member 3 is disposed in the receiving groove 1111. The end cap 12 covers the opening of the receiving groove 1111 to protect the elastic member 3, reduce the possibility of corrosion of the elastic member 3, and improve the stability of the elastic member 3 in use.

[0069] Optionally, the outer wall of the housing 11 may be provided with connection holes to facilitate the insertion of the rotary shaft 100 into the consumables storage device.

[0070] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the fixing member 1 and the elastic member 3 include two sets, and the two sets of fixing members 1 and elastic members 3 are respectively disposed at both ends of the rotating member 2.

[0071] In this embodiment, two sets of fixing members 1 and elastic members 3 are respectively disposed at both ends of the rotating member 2. Correspondingly, two abutment surfaces 133 are also provided at both ends of the rotating member 2. This can effectively improve the uniformity of the elastic force received by the rotating member 2 and improve the stability of the rotating member 2 during rotation.

[0072] Optionally, two sets of fixing members 1 and elastic members 3 are symmetrically arranged at both ends of the rotating member 2.

[0073] In one embodiment of this utility model, the elastic element 3 is a clock spring or a torsion spring.

[0074] Understandably, a spring or torsion spring is arranged around the rotation axis of the rotating member 2. Since the spring or torsion spring mainly has the characteristic of circumferential deformation, when the second end 32 of the elastic member 3 moves relative to the abutment surface 133, the circumferential deformation of the elastic member 3 will be more stable, effectively improving the stability of the rotating member 2 during rotation.

[0075] This utility model also proposes a consumable placement device, which includes a main body and a rotating shaft 100. The specific structure of the rotating shaft 100 is as described in the above embodiments. Since the rotating shaft 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. Among them, the fixing member 1 is connected to the main body.

[0076] In this embodiment, the main body serves as a supporting structure, enabling it to be stably placed on the platform.

[0077] Optionally, the fastener 1 can be detachably installed on the main body by means of screws or clips.

[0078] In some embodiments, the consumable placement device includes a plurality of rotating shafts 100, which are spaced apart on the main body to stably support the consumable tray.

[0079] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A slewing shaft, characterized in that The rotary shaft includes: Fasteners; A rotating member, at least a portion of which is sleeved within the fixed member, the rotating member being rotatable relative to the fixed member; and An elastic element is provided between the fixed element and the rotating element, one end of the elastic element is connected to the rotating element, and the other end of the elastic element abuts against the fixed element; When the rotating member rotates relative to the fixed member, the rotating member drives the elastic member to move, and the elastic member deforms.

2. The rotary pivot of claim 1, wherein, The inner wall surface of the fixing member is provided with an annular groove, and the annular groove is arranged in a ring along the rotation direction of the rotating member; The bottom of the annular groove forms an abutment surface, and the other end of the elastic member abuts against the abutment surface. The annular groove has a wavy profile in a cross section perpendicular to the central axis of the rotating member.

3. The rotary shaft as described in claim 2, characterized in that, The wave shape is composed of alternating troughs and crests.

4. The rotary shaft as described in claim 3, characterized in that, The trough is flared and includes a first sidewall and a second sidewall that are arranged opposite to each other. The inclination angle of the first sidewall is greater than that of the second sidewall.

5. The rotary shaft as described in claim 3, characterized in that, The inner wall of the trough has a smooth transition.

6. The rotary shaft as described in any one of claims 2 to 5, characterized in that, The rotating component is provided with a rotating shaft, and the fixed component is provided with a shaft hole. The rotating shaft passes through the shaft hole and rotates with the shaft hole, so that the fixed component and the rotating component are rotatably connected.

7. The rotary shaft as described in claim 6, characterized in that, The rotating shaft includes a shaft body and a fitting. The shaft body is connected to the rotating component, and the fitting is sleeved on the shaft body. The fitting has a limiting groove, and one end of the elastic component is limited in the limiting groove. The wall surface of the shaft hole has the abutment surface.

8. The rotary shaft as described in claim 1, characterized in that, The fixing member and the elastic member comprise two sets, with the two sets of fixing members and the elastic members respectively disposed at both ends of the rotating member.

9. The rotary shaft as described in claim 1, characterized in that, The elastic element is a clockwork spring or a torsion spring.

10. A consumables placement device, characterized in that, The consumables placement device includes: main body; The rotating shaft as described in any one of claims 1 to 9, wherein the fixing member is connected to the main body.

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