Hinged shaft, bendable rod body and dust collector
By using the snap-fit structure of the inner and outer shafts and the wire pass-through design, the problems of assembly efficiency and mechanical strength of the hinge shaft are solved, and the smoothness and aesthetics of the wire are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-01
AI Technical Summary
Existing hinge shafts are inefficient to assemble and lack mechanical strength. The wires are easily pulled or tangled, and the thickened injection molding material affects the aesthetics and the smoothness of rotation.
It adopts a snap-fit structure with inner and outer shafts. The outer shaft is equipped with snap-fit protrusions and ribs, while the inner shaft is equipped with a limiting groove. The wire passage is designed to be coaxially arranged, combined with the cable tray and wire receiving groove to guide the wire, ensuring assembly efficiency and mechanical strength.
It enables rapid assembly of the inner and outer shafts, reduces the thickness of the adhesive, enhances mechanical strength, avoids pulling and tangling of the wires, and ensures the smoothness of the wires within the hinge shaft.
Smart Images
Figure CN224179651U_ABST
Abstract
Description
Hinged shaft, bendable rod, and vacuum cleaner Technical Field
[0001] This utility model relates to the field of vacuum cleaner technology, specifically to a hinge shaft, a bendable rod, and a vacuum cleaner. Background Technology
[0002] When hinged rotation of the first and second structural components is required, a hinge shaft is needed. If wires are also required in the first and second structural components, to prevent the wires from being pulled or tangled during relative rotation, the wires can be passed through the inside of the hinge shaft before being inserted into the first and second structural components respectively.
[0003] These types of articulated shafts that require wires typically include an inner shaft and an outer shaft. However, how to achieve rapid assembly of the inner and outer shafts remains a problem in practice. In addition, in order to increase the mechanical strength of the shaft, it is often necessary to thicken the injection molding material of the articulated shaft. However, this will cause pits to form on the surface of the shaft after cooling and molding, which will affect both the smoothness of the rotation of the articulated shaft and its aesthetics. Summary of the Invention
[0004] To solve the above-mentioned technical problems, this utility model provides a hinge shaft for hinged connection of a first structural component and a second structural component, comprising: an inner shaft connected to the first structural component and the second structural component respectively; and an outer shaft sleeved on the outside of the inner shaft and rotatable relative to the inner shaft. The outer shaft includes a first bushing connected to the first structural component and a second bushing connected to the second structural component, the first bushing and the second bushing together forming the outer shaft. A snap-fit protrusion is provided on the inner surface of the first bushing, and a limiting groove that can engage with the snap-fit protrusion is provided on the outer surface of the inner shaft. A plurality of ribs protruding toward the outer surface of the inner shaft are also provided on the inner surfaces of the first bushing and the second bushing, and at least some of the ribs can fit against the outer surface of the inner shaft during rotation.
[0005] This application has the following beneficial effects:
[0006] This application provides a snap-fit protrusion on the inner surface of the first bushing. Therefore, when it is necessary to assemble the inner shaft and the outer shaft, the outer shaft hole is first passed through, and the limiting groove of the inner shaft is aligned with the snap-fit protrusion of the first bushing, so that the two can be assembled smoothly. Since the snap-fit protrusion is set on the outer shaft, it will not be interfered with when the inner shaft is inserted.
[0007] This application provides several ribs protruding towards the outer surface of the inner shaft on the inner surfaces of the first and second bushings, thereby forming a gap between two adjacent ribs. This reduces the thickness of the glue injection on the outer shaft, while ensuring that the ribs still have sufficient strength. Furthermore, the fit between the ribs and the inner shaft can effectively prevent the inner shaft from shaking when the hinge shaft rotates.
[0008] Furthermore, the inner shaft has a hollow threading cavity, and includes a first wire threading outlet and a second wire threading outlet. When the first structural member and the second structural member are coaxially arranged, the wire can pass through the edges of the first and second wire threading outlets on the side closest to the axial direction of the first and second structural members, and the wire passes through the mutually close edges of the first and second wire threading outlets. Therefore, the wire can be kept as coaxial with the axes of the first and second structural members as possible when passing through the first and second wire threading outlets, thus reducing the pulling on the wire.
[0009] Furthermore, taking the edge of the second wire outlet near the axial direction of the second structural member when the first structural member and the second structural member are coaxially arranged as the first critical edge, the second wire outlet extends on the outer surface of the inner shaft along the rotation direction of the second structural member, and the opening of the second wire outlet extends at an angle of not less than 180 degrees in the circumferential direction of the inner shaft.
[0010] Furthermore, the first wire outlet is located near the first structural member, and the second wire outlet is 180 degrees out of phase with the first wire outlet in the circumferential direction of the outer axis. The edge of the second wire outlet furthest from the first critical edge is the second critical edge. When the first and second structural members are coaxially arranged, the second critical edge is located on the inner axis near the first structural member. This results in the second wire outlet having a larger opening width along the circumferential direction of the inner axis, thus preventing interference with the wire when the second structural member bends relative to the first structural member from a coaxial to a parallel-axis state.
[0011] Furthermore, the first structural component is also provided with a first cable routing port that communicates with the first wire outlet. The openings of the first cable routing port and the first wire outlet partially intersect along the circumferential direction of the inner axis, and the edge of the first cable routing port away from the first structural component is located at the center of the first wire outlet. Therefore, the interaction between the edge of the first cable routing port and the edge of the first wire outlet provides better guidance for the wire, making the wire smoother inside the first structural component.
[0012] Furthermore, the second structural component is also provided with a second cable routing port that communicates with the second wire outlet, and the edge of the second cable routing port away from the second structural component is located in the opening area of the second wire outlet. Therefore, the interaction between the edge of the second cable routing port and the edge of the second wire outlet provides better guidance for the wire, making the wire run more smoothly inside the second structural component.
[0013] Furthermore, a wire receiving groove recessed towards its central axis is provided on the outer surface of the inner shaft, and the wire receiving groove is disposed adjacent to the first wire outlet.
[0014] This utility model also provides a bendable rod, which includes the aforementioned hinge shaft.
[0015] Furthermore, it includes a first rod and a second rod, the first rod including the first structural member, the second rod including the second structural member, and also includes a locking part connected to the first rod and the second rod respectively, the locking part being able to lock the first rod and the second rod when they are coaxially arranged.
[0016] This utility model also provides a vacuum cleaner, which includes the aforementioned hinge shaft or bendable rod. Attached Figure Description
[0017] Figure 1 is a three-dimensional structural diagram of the bendable rod of Embodiment 2 of this utility model;
[0018] Figure 2 is a three-dimensional structural diagram of the inner shaft of Embodiment 1 of this utility model;
[0019] Figure 3 is a schematic diagram showing the setting positions of the second cable outlet and the second wire through outlet in Embodiment 1 of this utility model;
[0020] Figure 4 is a schematic diagram showing the setting positions of the first cable outlet and the first wire through outlet in Embodiment 1 of this utility model;
[0021] Figure 5 is a schematic diagram showing the relative arrangement positions of the inner shaft, the first structural member, and the second structural member in Embodiment 1 of this utility model.
[0022] Figure 6 is a schematic diagram showing the setting positions of the first cable outlet and the first wire through outlet in Embodiment 1 of this utility model;
[0023] Figure 7 is a schematic diagram showing the setting positions of the second cable outlet and the second wire through outlet in Embodiment 1 of this utility model;
[0024] Figure 8 is a schematic diagram of the structure when the first structural component and the second structural component are coaxially arranged in Embodiment 1 of this utility model.
[0025] In the picture:
[0026] 1. First structural component; 11. First bushing; 111. Snap-fit protrusion; 12. First cable tray port; 13. Cable clamping position;
[0027] 2. Second structural component; 21. Second bushing; 22. Second cable tray;
[0028] 31. Inner shaft; 311. Limiting groove; 312. First wire outlet;
[0029] 313. Second conductor exit point; 3131. First critical edge; 3132. Second critical edge; 314. Conductor receiving groove;
[0030] 32. Outer shaft; 321. Rib;
[0031] 4. Locking part; 41. Locking button. Detailed Implementation
[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0033] Example 1:
[0034] Referring to Figures 1-8, this embodiment is a hinge shaft used to hinge the first structural member 1 and the second structural member 2 together. The hinge shaft of this embodiment includes an inner shaft 31 and an outer shaft 32 sleeved on the outside of the inner shaft 31 and rotatable relative to the inner shaft 31.
[0035] The outer shaft 32 includes a first bushing 11 connected to the first structural member 1 and a second bushing 21 connected to the second structural member 2. The first bushing 11 and the second bushing 21 together form the outer shaft 32. The inner shaft 31 passes through the outer shaft 32, thereby realizing the hinged connection between the first structural member 1 and the second structural member 2.
[0036] In this embodiment, the inner surface of the first bushing 11 is provided with a snap-fit protrusion 111, and the outer surface of the inner shaft 31 is provided with a limiting groove 311 that can engage with the snap-fit protrusion 111. During hinged connection, the inner shaft 31 and the first bushing 11 do not rotate relative to each other, while the second structural member 2 can rotate relative to the first structural member 1. The inner surfaces of the first bushing 11 and the second bushing 21 are also provided with a plurality of ribs 321 protruding toward the outer surface of the inner shaft 31. The height of the ribs 321 does not exceed the distance between the outer surface of the inner shaft 31 and the inner surface of the first bushing 11 or the second bushing 21. That is, the height of the ribs 321 is less than the height of the snap-fit protrusion 111, and the ribs 321 cannot be snapped into the limiting groove 311. Therefore, when the second structural member 2 rotates relative to the first structural member 1, at least some of the ribs 321 can fit against the outer surface of the inner shaft 31.
[0037] The hinge shaft of this application has a snap-fit protrusion 111 on the inner surface of the first bushing 11. Therefore, when it is necessary to assemble the inner shaft 31 and the outer shaft 32, the first bushing 11 and the second bushing 21 are first aligned to form the outer shaft 32. Then, the limiting groove 311 of the inner shaft 31 is aligned with the snap-fit protrusion 111 of the first bushing 11 and inserted into the outer shaft 32, thus achieving smooth assembly. Since the snap-fit protrusion 111 is set on the outer shaft 32, it is only necessary to simply set a limiting groove 311 along its axial direction on the inner shaft 31 to ensure that the inner shaft 31 will not be interfered with when it is inserted into the outer shaft 32. Conversely, if the snap-fit protrusion is set on the inner shaft and a corresponding limiting groove is set on the outer shaft, then when the inner shaft is inserted into the outer shaft, the limiting grooves of the outer shaft and the inner shaft must be interconnected to ensure smooth insertion of the inner shaft, resulting in lower installation efficiency.
[0038] In addition, this application provides several ribs 321 protruding toward the outer surface of the inner shaft 31 on the inner surface of the first bushing and the second bushing 21, thereby forming a gap between two adjacent ribs 321. Thus, the thickness of the glue injection on the outer shaft 32 is reduced, but the ribs ensure that it still has sufficient strength. Furthermore, by fitting the ribs 321 with the inner shaft 31, the shaking of the inner shaft 31 can be effectively prevented when the hinge shaft rotates.
[0039] In some embodiments, referring to Figure 2, the inner shaft 31 has a hollow threading cavity. The inner shaft 31 includes a first wire threading outlet 312 and a second wire threading outlet 313. When the first structural member 1 and the second structural member 2 are coaxially arranged, the wire can pass through the edges of the first wire threading outlet 312 and the second wire threading outlet 313 on the side closest to the axial direction of the first structural member 1 and the second structural member 2 (A in Figure 4), and the wire passes through the mutually close edges of the first wire threading outlet 312 and the second wire threading outlet 313. During assembly, after the wire is first threaded into the inner shaft 31, its two ends pass through the first wire threading outlet 312 and the second wire threading outlet 313 respectively, and then the locking protrusion 111 is locked into the limiting groove 311. Therefore, the wire can be kept as coaxial with the axis of the first structural member 1 and the second structural member 2 as possible when passing through the first wire threading outlet 312 and the second wire threading outlet 313, thus reducing the pulling on the wire.
[0040] Referring to Figure 3, with the edge of the second wire outlet 313 near the axis of the second structure 2 when the first structure 1 and the second structure 2 are coaxially arranged as the first critical edge 3131, the second wire outlet 313 extends on the outer surface of the inner shaft 31 along the rotation direction of the second structure 2, and the opening of the second wire outlet 313 extends at an angle of not less than 180 degrees in the circumferential direction of the inner shaft (as shown by the hollow arrow B in the figure).
[0041] In some embodiments, the first wire outlet 312 is disposed near the first structural member 1, and the second wire outlet 313 is 180 degrees out of phase with the first wire outlet 312 in the circumferential direction of the outer axis 32. The edge of the second wire outlet 313 away from the first critical edge 3131 is the second critical edge 3132. When the first structural member 1 and the second structural member 2 are coaxially disposed, the second critical edge 3132 is located on the inner axis 31 near the first structural member 1 (see Figures 3 and 5 for reference). As a result, the second wire outlet 313 has a larger opening width in the circumferential direction of the inner axis 31, so that when the second structural member 2 bends relative to the first structural member 1 from a coaxial state to a parallel state, it will not cause interference to the wire.
[0042] Referring to Figures 4 and 6, the first structural member 1 is further provided with a first cable routing port 12 that communicates with the first wire outlet 312. The openings of the first cable routing port 12 and the first wire outlet 312 partially intersect along the circumferential direction of the inner axis 31, and the edge of the first cable routing port 12 away from the first structural member 1 is located in the middle of the first wire outlet. Therefore, the interaction between the edge of the first cable routing port 12 and the edge of the first wire outlet 312 provides better guidance for the wire, making the wire more smoothly arranged on the surface of the first structural member 1.
[0043] Referring to Figures 3 and 7, the second structural member 2 is further provided with a second cable routing port 22 that communicates with the second wire exit 313, and the edge of the second cable routing port 22 away from the second structural member 2 is located in the opening area of the second wire exit 313. Therefore, the interaction between the edge of the second cable routing port 22 and the edge of the second wire exit 313 provides better guidance for the wire, making the wire smoother inside the second structural member 2. In some embodiments, the first wire exit 312 and the second wire exit 313 are approximately parallel to the central axis of the first structural member 1 and the second structural member 2 when they are coaxially arranged.
[0044] In some embodiments, the snap-fit protrusion 111 is a protruding edge arranged along the axial direction of the outer shaft 32, and correspondingly, a limiting groove 311 arranged along the axial direction is provided on the inner shaft 31 (as shown in Figure 5). In some embodiments, the limiting groove 311 is configured to communicate with the second wire through-hole 313 and is located on the same side near the inner shaft 31, thus facilitating the machining of the corresponding structural component on the inner shaft 31. In other possible embodiments, the snap-fit protrusion 111 may also be a plurality of dot-shaped protrusions, or a spiral protruding edge or protruding point. The snap-fit protrusion 11 may also be spirally arranged on the outer shaft 32, thus allowing it to rotate into the outer shaft 32 when it is necessary to insert the inner shaft 31 into the outer shaft 32.
[0045] In some embodiments, the second wire outlet 313 is located near the end of the inner shaft 31, while the first wire outlet 312 is located near the middle region of the inner shaft 31. This reduces the installation path of the wire inside the inner shaft 31 and facilitates the movement of the wire within the second wire outlet 313 when the second structural member 2 rotates relative to the first structural member 1.
[0046] In some embodiments, a wire receiving groove 314 recessed toward its central axis is provided on the outer surface of the inner shaft 31. The wire receiving groove 314 is located adjacent to the first wire outlet 312, so that the wire passing through the first wire outlet 312 can be inserted into the wire receiving groove 314, thereby stabilizing the position of the wire on the hinge shaft.
[0047] Example 2:
[0048] Referring to Figure 1, this embodiment is a bendable rod, which includes the hinge shaft of Embodiment 1. The rod includes a first rod and a second rod. The first rod includes a first structural member 1, and the second rod includes a second structural member 2. It also includes a locking part 4 that is connected to the first rod and the second rod respectively. The locking part 4 can lock the first rod and the second rod when they are coaxially arranged. The locking part 4 includes a locking button 41 hinged to the second rod. A spring is provided on the inner surface of the locking button 41 to always push the locking button 41 outward. A latch is provided at the end of the locking button 41 near the first structural member 1. Correspondingly, a slot is provided on the first structural member 1 to engage with the latch. Therefore, when the second rod rotates to the coaxial position relative to the first rod, the locking button 41 is always forced in the direction of engaging with the slot of the first rod under the action of the spring, thereby realizing the engagement of the first rod and the second rod in the upright position. When it is necessary to bend them, it is only necessary to forcefully lift the end of the locking button 41 connected to the first rod to contact the latch and the slot.
[0049] In some embodiments, the first rod body further includes a first protective sleeve disposed on the outside of the first structural member 1. Correspondingly, a second protective sleeve is disposed on the outside of the second structural member 2. Thus, the wires passing through the first cable routing port 12 of the first structural member 1 can be blocked by the first protective sleeve after being wound around the first structural member 1, and the wires passing through the second cable routing port 22 of the second structural member 2 can be blocked by the second protective sleeve after being wound around the second structural member 2, thereby achieving the effect of hiding the wires. In some embodiments, a wire clamping position 13 (see Figure 8) can also be provided on the outer surface of the first structural member 1 or the second structural member 2, thereby achieving the effect of limiting or fixing the wires on the surface of the first structural member 1 or the second structural member 2.
[0050] The hinge shaft is located on one side of the first rod and the second rod, and the locking button 41 is located on the other side. Therefore, when it is necessary to bend the first rod and the second rod, the locking button 41 is opened and the first rod and the second rod are rotated relative to the hinge shaft.
[0051] Example 3:
[0052] This embodiment is a vacuum cleaner, which includes the hinge shaft of Embodiment 1 or the bendable rod of Embodiment 2.
[0053] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.
Claims
1. A hinge shaft for hinged connection between a first structural member and a second structural member, comprising: The inner shaft is connected to the first structural component and the second structural component respectively; An outer shaft is sleeved on the outside of the inner shaft and can rotate relative to the inner shaft. The outer shaft includes a first bushing connected to the first structural member and a second bushing connected to the second structural member. The first bushing and the second bushing together form the outer shaft. The outer shaft is characterized in that a snap-fit protrusion is provided on the inner surface of the first bushing, and a limiting groove that can engage with the snap-fit protrusion is provided on the outer surface of the inner shaft. A plurality of ribs protruding toward the outer surface of the inner shaft are also provided on the inner surfaces of the first bushing and the second bushing. When rotating, at least some of the ribs can fit against the outer surface of the inner shaft.
2. The hinge shaft according to claim 1, characterized in that, The inner shaft has a hollow wire-passing cavity. The inner shaft includes a first wire-passing outlet and a second wire-passing outlet. When the first structural member and the second structural member are coaxially arranged, the wire can pass through the edge of the first wire-passing outlet and the second wire-passing outlet on the side close to the axis of the first structural member and the second structural member, and the wire passes through the mutually close edges of the first wire-passing outlet and the second wire-passing outlet.
3. The hinge shaft according to claim 2, characterized in that: With the edge of the second wire outlet near the axis of the second structure when the first and second structure are coaxially arranged as the first critical edge, the second wire outlet extends on the outer surface of the inner shaft along the rotation direction of the second structure, and the opening of the second wire outlet extends at an angle of not less than 180 degrees in the circumferential direction of the inner shaft.
4. The hinge shaft according to claim 3, characterized in that: The edge of the second conductor outlet that is away from the first critical edge is the second critical edge. When the first structural member and the second structural member are coaxially arranged, the second critical edge is located on the inner axis closer to the first structural member.
5. The hinge shaft according to any one of claims 2-4, characterized in that, The first structural member is further provided with a first cable routing port that can communicate with the first wire outlet. The openings of the first cable routing port and the first wire outlet are partially staggered in the circumferential direction along the inner axis, and the edge of the first cable routing port away from the first structural member is located in the middle of the first wire outlet.
6. The hinge shaft according to any one of claims 2-4, characterized in that, The second structural member is further provided with a second cable tray that can communicate with the second wire outlet, and the edge of the second cable tray away from the second structural member is located in the opening area of the second wire outlet.
7. The hinge shaft according to any one of claims 2-4, characterized in that, A wire receiving groove recessed towards its central axis is also provided on the outer surface of the inner shaft, and the wire receiving groove is disposed adjacent to the first wire outlet.
8. A bendable rod, characterized in that, Includes the hinge shaft as described in any one of claims 1-7.
9. The bendable rod according to claim 8, characterized in that, It includes a first rod and a second rod. The first rod includes the first structural member, and the second rod includes the second structural member. It also includes a locking part that is connected to the first rod and the second rod respectively. The locking part can lock the first rod and the second rod when they are coaxially arranged.
10. A vacuum cleaner, characterized in that, Includes the hinge shaft as described in any one of claims 1-7 or the bendable rod as described in claim 8 or 9.