Rod connecting device and cleaning tool
By introducing a different progress design of the lock sleeve and the clamp in the rod connection device, the threaded connection is used to achieve stable connection of the rod, which solves the problem of the existing device requiring great effort to assemble and improves the user experience.
Patent Information
- Application Number
- CN202421838333.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The existing rod connecting devices require a lot of effort when assembling, resulting in poor user experience and difficulty in assembly.
The lock sleeve and the clamp design adopts the design, and there are different progress differences between the lock sleeve and the outer rod and the clamp. The threaded connection enables the clamp to move the clamp in the axial direction, and gradually squeezes the outer rod and shrinks radially to connect the inner rod to reduce the user's force application needs.
Through poor progress design, the user needs to work during assembly process is reduced, and the convenience of operation and user experience are improved.
Smart Images
Figure CN223158336U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of household appliances, and particularly relates to a rod connection device and a cleaning tool. Background Art
[0002] In daily life, household cleaning tools generally need to be assembled by users themselves or an extension rod needs to be added to the handle of the cleaning tool. Therefore, it is necessary to stably connect the cleaning head of the cleaning tool with the handle or stably connect the handle with the extension rod.
[0003] In the existing rod connection devices, generally, a threaded tube is used to drive an expansion block. The expansion block presses against one end of the outer rod, causing the end of the rod to shrink and deform, and then pressing against the inner rod, so that the two rods are connected. However, in the existing design of using a threaded tube to drive the expansion block, when the deformation amplitude of the expansion block is large, users need to use a lot of force to turn the threaded tube, resulting in difficult assembly for users, inconvenient use, and reduced user experience.
[0004] Therefore, there is a need for a rod connection device that can be convenient for users to use and labor-saving in operation to assemble the rod of the cleaning tool. Summary of the Utility Model
[0005] This application aims to provide a rod connection device and a cleaning tool that can be convenient for users to use and labor-saving in operation to solve the problem that users need to use a lot of force to operate during rod assembly in the existing design, making the assembly difficult. For this purpose, in a first aspect, this application provides a rod connection device, including:
[0006] Inner rod;
[0007] Outer rod, the first end of which is radially telescopic and the first end is sleeved on the inner rod;
[0008] Lock sleeve, sleeved on the outer rod;
[0009] A clamping block is arranged between the outer rod and the lock sleeve and is in inclined surface fit with the first end of the outer rod;
[0010] The lock sleeve is provided with a first limiting section for positioning with the outer rod and a second limiting section for positioning with the clamping block. When an external force drives the lock sleeve to rotate relative to the outer rod, in a first direction, the lock sleeve has a first advancement and a second advancement relative to the outer rod and the clamping block respectively, and the first advancement is greater than the second advancement, so that the lock sleeve drives the clamping block to move along the first direction, thereby squeezing the first end of the outer rod to radially contract and press tightly against the inner rod to connect the inner rod and the outer rod;
[0011] Wherein the first direction is along the axial direction of the outer rod and points from the first end of the outer rod to the second end away from the first end.
[0012] In some embodiments, the second limiting section has a second internal thread, the outer side of the clamping block has a second external thread, and the lock sleeve and the clamping block are screwed together through the second internal thread and the second external thread to form a clamping position.
[0013] In some embodiments, the first limiting section has a first internal thread, the first end of the outer rod has a first external thread, and the lock sleeve and the outer rod are screwed together through the first internal thread and the first external thread to form a clamping position.
[0014] In some embodiments, the pitch of the first internal thread is greater than the pitch of the second internal thread, so that when the lock sleeve rotates, it has a first progress and a second progress relative to the outer rod and the clamping block respectively, and the first progress is greater than the second progress.
[0015] In some embodiments, the first end of the outer rod has a telescopic portion, and the clamping block is in inclined surface fit with the telescopic portion. When the lock sleeve drives the clamping block to move along the first direction, the clamping block squeezes the telescopic portion to make it contract radially along the outer rod and press tightly against the inner rod.
[0016] In some embodiments, the telescopic portion includes a plurality of cantilevers arranged circumferentially along the outer rod, and the cantilevers extend along the first direction.
[0017] In some embodiments, the free end of the cantilever is in inclined surface fit with the clamping block. When the lock sleeve drives the clamping block to move along the first direction, the clamping block squeezes the free end of the cantilever, causing the cantilever to bend towards the inner side of the outer rod and then press tightly against the inner rod.
[0018] In some embodiments, the first end of the outer rod includes an inclined surface fit portion, and along the first direction, the outer diameter of the inclined surface fit portion shows an increasing trend, so that the outer side of the inclined surface fit portion is formed into an inclined surface facing the clamping block.
[0019] In some embodiments, the first end of the outer rod has a telescopic portion, the telescopic portion includes a plurality of cantilevers arranged circumferentially along the outer rod, and the inclined surface fit portion is located at the free end of the cantilever.
[0020] In some embodiments, the clamping block includes a main body portion, and the main body portion is sleeved on the first end of the outer rod and is in inclined surface fit with the first end of the outer rod.
[0021] In some embodiments, along the first direction, the inner diameter of the main body portion shows a decreasing trend, so that the inner side of the main body portion is formed into an inclined surface facing the outer rod.
[0022] In some embodiments, the first end of the outer rod includes an inclined surface mating portion, and the inner side of the main body portion mates with the inclined surface mating portion. When the lock sleeve drives the block to move in the first direction, the inner side of the main body portion presses against the inclined surface mating portion, causing the first end of the inner rod to contract radially along it.
[0023] In some embodiments, a rotation prevention structure is provided between the block and the outer rod. When an external force drives the lock sleeve to rotate relative to the outer rod, the rotation prevention structure restricts the relative rotation between the block and the outer rod.
[0024] In some embodiments, the block is provided with a rotation prevention rib extending in the first direction, and the outer rod is provided with a rotation prevention groove extending in the first direction. The rotation prevention rib and the rotation prevention groove cooperate to form a rotation prevention structure.
[0025] In some embodiments, the block includes a main body portion, and the rotation prevention rib is provided on the inner side of the main body portion; the first end of the outer rod has a telescopic portion, and the telescopic portion includes a plurality of cantilevers arranged circumferentially along the outer rod, and the rotation prevention groove is formed as a gap between any two adjacent cantilevers.
[0026] In a second aspect of the present application, there is also provided a cleaning tool, including a cleaning head and the rod connecting device in the above embodiments, and the cleaning head is rotatably connected to the end of the inner rod away from the outer rod.
[0027] In some embodiments, it further includes a grip rod fixedly connected to the end of the outer rod away from the inner rod.
[0028] In some embodiments, the cleaning head is a mop head.
[0029] In the rod connecting device of the present application, the lock sleeve has a first progress and a second progress relative to the outer rod and the block respectively, and the first progress is greater than the second progress. When the lock sleeve rotates, a progress difference is generated between the relative outer rod and the block, so that the block gradually moves outward relative to the outer rod with this progress difference, thereby reducing the force required to drive the block and making the force applied by the user more gentle. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0031] Figure 1Shows an overall schematic diagram of the rod connection device disclosed in the present application;
[0032] Figure 2 Shows an exploded schematic diagram of the rod connection device disclosed in the present application;
[0033] Figure 3 Shows a side cross-sectional view of the rod connection device disclosed in the present application;
[0034] Figure 4 [[ID=!2]]Shows a schematic diagram of the outer rod disclosed in the present application;
[0035] Figure 5 Shows a side cross-sectional view of the outer rod disclosed in the present application;
[0036] Figure 6 Shows a schematic diagram of the lock sleeve disclosed in the present application;
[0037] Figure 7 Shows a side cross-sectional view of the lock sleeve disclosed in the present application;
[0038] Figure 8 Shows a schematic diagram of the clamping block disclosed in the present application;
[0039] Figure 9 Shows a side cross-sectional view of the clamping block disclosed in the present application;
[0040] Figure 10 Shows a schematic diagram of the cleaning tool disclosed in the present application.
[0041] Reference numerals:
[0042] 1. Inner rod;
[0043] 2. Outer rod; 21. First external thread; 22. Telescopic part; 221. Cantilever; 23. Inclined surface mating part; 24. Anti-rotation groove
[0044] 3. Lock sleeve; 31. First limiting section; 311. First internal thread; 32. Second limiting section; 321. Second internal thread;
[0045] 4. Clamping block; 41. Second external thread; 42. Main body part; 43. Anti-rotation rib;
[0046] 5. Cleaning head;
[0047] 6. Grip rod. Detailed implementation manners
[0048] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0049] It should be noted that all the directional indications in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indication will also change accordingly.
[0050] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0051] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0052] Next, the present application will be described in conjunction with the accompanying drawings and with reference to specific embodiments:
[0053] [[ID=J15]]Example 1:
[0054] As Figure 1-3As shown in the figure, an embodiment of the present application discloses a rod connection device, which includes an inner rod 1, an outer rod 2, a lock sleeve 3 and a clamping block 4. One end of the outer rod 2 is sleeved on the inner rod 1, and the end sleeved on the inner rod 1 can be radially telescopic along the outer rod 2, that is, it can be deformed radially to press tightly on the inner rod 1, so that the inner rod 1 and the outer rod 2 are relatively fixed, and then the inner rod 1 and the outer rod 2 are connected. The lock sleeve 3 is sleeved on the outer rod 2, and the clamping block 4 is arranged between the lock sleeve 3 and the outer rod 2 and is in inclined surface fit with the end of the outer rod 2 sleeved on the inner rod 1. Denote the direction along the axial direction of the outer rod 2 and pointing from the first end of the outer rod 2 to the second end away from the first end as the first direction. Then when the lock sleeve 3 moves along the first direction, it can drive the clamping block 4 to move. At the same time, since the clamping block 4 is always restricted by the lock sleeve 3 in the radial direction of the lock sleeve 3 and cannot expand, and because the clamping block 4 is in inclined surface fit with the outer rod 2, when the clamping block 4 moves, the pressing degree on the outer rod 2 gradually increases, so that the radial contraction degree of the outer rod 2 increases, and then the pressing degree on the inner rod 1 increases. The clamping block 4 can be a ring-shaped one that cooperates with the lock sleeve 3 and the outer rod 2 and is sleeved on the outer rod 2 as a whole, or one or more expansion blocks clamped between the lock sleeve 3 and the outer rod 2. As long as when the lock sleeve 3 moves along the first direction, it can drive the clamping block 4 to be further clamped between the lock sleeve 3 and the outer rod 2, so that the outer rod 2 contracts radially.
[0055] As Figure 6 , 7 shown in the figure, the lock sleeve 3 is provided with a first limiting section 31 and a second limiting section 32. The first limiting section 31 is engaged with the outer rod 2, which can limit the lock sleeve 3 and the outer rod 2 in the first direction, so that the two cannot have a direct displacement along the axial direction of the outer rod 2. The second limiting section 32 is engaged with the clamping block 4, which can limit the lock sleeve 3 and the clamping block 4 in the second direction, so that when the lock sleeve 3 moves along the first direction, it can drive the clamping block 4 to generate a displacement along the first direction. The above-mentioned engagement is intended to limit the direct relative movement of the lock sleeve 3 relative to the outer rod 2 and the clamping block 4 in the first direction. For example, as Figure 4-7As shown, the lock sleeve 3 and the outer rod 2 can be clamped by means of threaded connection, so that only when the lock sleeve 3 rotates, a spiral relative displacement trajectory of the lock sleeve 3 relative to the outer rod 2 is generated, rather than a direct axial relative movement; it can also be in the form of multi-stage serrated steps, so that the lock sleeve 3 and the outer rod 2 are clamped by the serrated steps. When the lock sleeve 3 needs to move relative to the outer rod 2, the lock sleeve 3 needs to be rotated first to unlock the step clamping, and then the lock sleeve 3 is moved, and then rotated to lock the step clamping. This method can also avoid the direct relative movement of the lock sleeve 3 and the outer rod 2 in the first direction; similarly, the clamping of the lock sleeve 3 and the clamping block 4 can be achieved by the same method above. When the lock sleeve 3 is clamped with the outer rod 2 and the clamping block 4 at the same time, the relative position between the outer rod 2 and the clamping block 4 can be restricted by the lock sleeve 3. Furthermore, the cooperation degree of the inclined surface between the clamping block 4 and the outer rod 2 can be controlled through the lock sleeve 3, so that the pressing degree of the clamping block 4 against the outer rod 2 can be changed.
[0056] As Figure 3 shown, when an external force drives the lock sleeve 3 to rotate relative to the outer rod 2, in the first direction, the lock sleeve 3 generates a first progress and a second progress relative to the outer rod 2 and the clamping block 4 respectively, and the first progress is greater than the second progress. That is, in the first direction, the relative displacement between the lock sleeve 3 and the outer rod 2 is greater than the relative displacement between the lock sleeve 3 and the clamping block 4. Generally, the lock sleeve 3 is not deformable in the first direction. Therefore, the lock sleeve 3 will drive the clamping block 4 to move a distance, which is the difference between the first progress and the second progress. For general household cleaning tools, their processing accuracy is not very high. Therefore, the moving amplitude of the lock sleeve 3 driving the clamping block 4 is greatly affected by the accuracy of the corresponding clamping structure at different clamping positions between the lock sleeve 3 and the outer rod 2. Therefore, in the prior art, the movement of the lock sleeve 3 in the first direction is basically the same as that of the clamping block 4, that is, the amplitude is relatively large. However, in the above embodiment, the method of the difference between two progresses is adopted, that is, the difference between two relatively close progresses can be used, so that the average amplitude of the lock sleeve 3 driving the clamping block 4 to move is greatly reduced. Furthermore, the external force required for the user to drive the lock sleeve 3 can be smaller.
[0057] As Figure 3 、 7As shown in FIGS. -9, in some embodiments, the second limiting section 32 has a second internal thread 321, and the outside of the clamping block 4 has a second external thread 41. The sleeve 3 and the clamping block 4 are clamped by screwing the second internal thread 321 and the second external thread 41. In this way, when the sleeve 3 rotates, it can move relative to the clamping block 4, which is the second progress. The user only needs to hold the sleeve 3 and rotate it to drive the clamping block 4, which is more convenient and labor-saving than directly driving the clamping block 4 to move in the first direction. Moreover, by using the thread method, the driving of the clamping block 4 by the sleeve 3 is continuously variable, avoiding problems such as jerks or difficulty in clamping that may occur when using methods such as serrated steps. Similarly, the first limiting section 31 has a first internal thread 311, and the first end of the outer rod 2 has a first external thread 21. The sleeve 3 and the outer rod 2 are clamped by screwing the first internal thread 311 and the first external thread 21, and similar effects to when the sleeve 3 is screwed to the clamping block 4 can also be achieved.
[0058] It should be noted that in the above embodiments, the cooperation between the second internal thread 321 and the second external thread 41 and the cooperation between the first internal thread 311 and the first external thread 21 can exist simultaneously, or only the cooperation between the second internal thread 321 and the second external thread 41 can exist, and other methods can be used for the clamping between the first limiting section 31 and the outer rod 2. Or only the cooperation between the first internal thread 311 and the first external thread 21 can exist, and other methods can be used for the clamping between the second limiting section 32 and the clamping block 4, as long as when the sleeve 3 rotates, it has two progressions relative to the inner rod 2 and the clamping block 4, and the first progression relative to the inner rod 2 is greater than the second progression relative to the clamping block 4.
[0059] In some embodiments, the first end of the outer rod 2 has a telescopic portion 22, as Figure 4 、 5 shown. The telescopic portion 22 has the ability to deform in the radial direction of the outer rod 2, enabling the outer rod 2 to be fixed to the inner rod 1. As Figure 3, the clamping block 4 and the telescopic part 22 are in inclined surface cooperation. When the lock sleeve 3 drives the clamping block 4 to move in the first direction, the telescopic part 22 is further squeezed by the clamping block 4, and then the telescopic part 22 gradually contracts and presses against the inner rod 1. In the stage of the inclined surface cooperation between the clamping block 4 and the telescopic part 22, the greater the distance that the lock sleeve 3 drives the clamping block 4 to move in the first direction, the greater the squeezing amplitude of the clamping block 4 on the telescopic part 22, so the connection between the outer rod 2 and the inner rod 1 is tighter. The telescopic part 22 can be a section on the inner rod 2 or a part on the pipe wall of the inner rod 2. The implementation form of the telescopic part 22 can also adopt various ways. For example, the telescopic part 22 is made of an elastic material such as rubber. This kind of material generally has the ability to deform under external force and can restore deformation when there is no external force to maintain a certain structural stability; an elastic block can also be used, that is, the telescopic part 22 is formed into a rigid block, and elastic parts such as springs and elastic sheets are used on one side close to the clamping block 4 or on one side close to the inner rod 1, so that the rigid block has a certain ability to move along the radial direction of the outer rod 2;
[0060] As Figure 4 , 5 shown, the implementation form of the telescopic part 22 can also adopt the cantilever method. Specifically, several cantilevers 221 are arranged along the circumferential direction of the outer rod 2 and extend in the first direction. The free ends of the cantilevers 221 are located at the end of the outer rod 2, and the fixed ends are located on the side wall of the outer rod 2. The cantilevers 221 can generate a certain deflection under external force, that is, the cantilevers 221 can bend, and their free ends can deflect inward or outward of the outer rod 2.
[0061] Furthermore, as Figure 3 shown, the free ends of the cantilevers 221 and the clamping block 4 are in inclined surface cooperation. When the lock sleeve 3 drives the clamping block 4 to move in the first direction, the clamping block 4 further squeezes the free ends of the cantilevers 221 inward of the outer rod 2, causing the cantilevers 221 to bend inward of the outer rod 2, that is, the free ends of the cantilevers 221 deflect inward of the outer rod 2. Therefore, the cantilevers 221 can be pressed against the inner rod 1. The greater the distance that the clamping block 4 moves in the first direction, the greater the squeezing amplitude on the free ends of the cantilevers 221. Therefore, the pressing effect of the cantilevers 221 on the inner rod 1 is more obvious, and thus the outer rod 2 and the inner rod 1 can be connected.
[0062] In some embodiments, as Figure 4 , 5As shown, the outer rod 2 is sleeved on one end of the inner rod 1 and further includes an inclined surface matching portion 23. Along the first direction, the outer diameter of the inclined surface matching portion 23 shows an increasing trend. That is, when the inclined surface matching portion 23 is located at the pipe wall of the outer rod 2 or the extension of the pipe wall, the inclined surface matching portion 23 is an annular inclined surface or an arc-shaped inclined surface coaxial with the pipe wall of the outer rod 2. For example, when the outer rod 2 at the inclined surface matching portion 23 is made of an elastically deformable material such as rubber, the outer rod 2 at the inclined surface matching portion 23 can be the pipe wall of the outer rod 2, that is, formed into an annular inclined surface. Similarly, the inclined surface matching portion 23 can also be formed into one or more arc-shaped inclined surfaces. The inclined surface faces the clamping block 4, and the outside of the clamping block 4 is restricted by the locking sleeve 3, so it will not expand outward. Therefore, when the clamping block 4 moves along the first direction, that is, from the thinner part to the thicker part of the inclined surface matching portion 23, the extrusion amplitude of the inclined surface matching portion 23 gradually increases, causing the outer rod 2 at the inclined surface matching portion 23 to contract, and then pressing tightly against the inner rod 1. When the first end of the outer rod 2 has a telescopic portion 22, and a plurality of cantilevers 221 arranged along the circumferential direction of the outer rod 2 are provided on the telescopic portion 22, the inclined surface matching portion 23 is located at the free end of the cantilever 221, that is, a deformable material is provided at the free end of the cantilever 221. When the clamping block 4 moves along the first direction, the deformable material itself undergoes a certain deformation, and at the same time, it can also drive the free end of the cantilever 221 to bend inwardly towards the outer rod 2, generating a certain deflection, so that it presses tightly against the inner rod 1; or, an inclined surface facing the clamping block 4 is provided at the free end of the cantilever 221. When the clamping block 4 moves along the first direction, that is, from the thinner part to the thicker part at the free end of the cantilever 221, the cantilever 221 is caused to bend inwardly towards the outer rod 2 and press tightly against the inner rod 1.
[0063] In some embodiments, as Figure 2 、 3 、8, and 9 show, the clamping block 4 is sleeved on the outer rod 2 through a main body portion 42 and is in inclined surface matching with one end of the outer rod 2 sleeved on the inner rod 1. That is, the main body portion 42 of the clamping block 4 is annular and sleeved on the outer rod 2, so that when the locking sleeve 3 moves along the first direction, the outer rod 2 can be used to guide the movement of the clamping block 4, avoiding the clamping block 4 from deforming in any direction when being squeezed by the locking sleeve 3 and the outer rod 2.
[0064] Furthermore, along the first direction, as Figure 8 、 9As shown, the inner diameter of the main body portion 42 shows a gradually decreasing trend, that is, the inner side of the main body portion 42 is formed as an inclined surface facing the outer rod 2. When the end portion of the outer rod 2 is a non-inclined surface fitting portion 23, the inclined surface on the inner side of the main body portion 42 causes the extrusion effect of the main body portion 42 on the end portion of the outer rod 2 to become more obvious as the thicker portion of the main body portion 42 moves to the end portion of the outer rod 2. Therefore, the deformation amplitude of the outer rod 2 can gradually increase as the main body portion 42 moves in the first direction. When the end portion of the outer rod 2 has an inclined surface fitting portion 23, that is, the main body portion 42 moves from the thinner portion to the thicker portion relative to the inclined surface fitting portion 23, and the inclined surface fitting portion 23 also moves from the thinner portion to the thicker portion relative to the main body portion 42, which can further enhance the extrusion effect of the locking block 4 on the outer rod 2.
[0065] In some embodiments, in order to ensure the extrusion effect and prevent the locking block 4 from rotating when the lock sleeve 3 rotates, which may affect its extrusion effect, a rotation prevention structure is provided between the locking block 4 and the outer rod 2. Since both the lock sleeve 3 and the outer rod 2 exert pressure on the locking block 4, and due to the fact that the greater the pressure, the greater the frictional force, the lock sleeve 3 will drive the locking block 4 to have a tendency to rotate. When the lock sleeve 3 drives the locking block 4 to rotate, the locking block 4 is very likely to slip in place, that is, only rotate without moving in the first direction, and thus cannot further exert pressure on the outer rod 2. The existence of the rotation prevention structure can ensure that the locking block 4 does not rotate relative to the outer rod 2 and can only move in the first direction under the drive of the lock sleeve 3.
[0066] Specifically, as Figure 4 、 5 、8, 9 show, the rotation prevention structure includes a rotation prevention rib 43 extending in the first direction on the locking block 4 and a rotation prevention groove 24 provided on the outer rod 2 extending in the first direction. The rotation prevention rib 43 cooperates with the rotation prevention groove 24, and both extend in the first direction, which can ensure that the locking block 4 can move relative to the outer rod 2 in the first direction and will not rotate relative to each other. The rotation prevention rib 43 can be located at multiple positions on the locking block 4, such as on the side of the locking block 4 close to the outer rod 2, or at the end portion of the locking block 4 in the first direction, or it can be an independent protruding portion on the locking block 4. As long as it can ensure that the rotation prevention rib 43 can extend into the rotation prevention groove 24 when the locking block 4 moves in the first direction, and at the same time, the shape of the rotation prevention rib is not specifically limited. It can be strip-shaped, or a regular or irregular-shaped protrusion on the main body portion 42 of the locking block 4. No matter what shape it is, as long as it can extend into the rotation prevention groove 24 and slide along the rotation prevention groove 24, the rotation prevention of the outer rod 2 on the locking block 4 can be completed by the side wall of the rotation prevention groove 24 limiting the rotation prevention rib 43.
[0067] Further, when the clamping block 4 includes a main body portion 42, the anti-rotation rib 43 can be provided inside the main body portion 42. One end of the outer rod 2 sleeved on the inner rod 1 includes a telescopic portion 22. The telescopic portion 22 includes a plurality of cantilevers 221 arranged along the axial direction of the outer rod 2. The anti-rotation groove 24 is the gap between any two adjacent cantilevers 221. When the clamping block 4 is sleeved on the outer rod 2 and moves in the first direction, the anti-rotation rib 43 just moves along the anti-rotation groove 24. This design utilizes the gap between adjacent cantilevers 221, making the overall structure more compact and achieving the purpose of anti-rotation at the same time.
[0068] Working process of the above embodiment: First, screw the clamping block 4 into the second limiting section 32 of the lock sleeve 3, so that the second external thread 41 on the outside of the clamping block 4 is screwed with the second internal thread 321 in the lock sleeve 3. At this time, since the clamping block 4 does not press on the outer rod 2, the inner space can still accommodate the outer rod 2 to be sleeved; then, sleeve the lock sleeve 3 screwed with the clamping block 4 on the outside of the outer rod 2 and insert the inner rod 1 into the outer rod 2, that is, the preparation before locking the inner rod 1 and the outer rod 2 is completed; then align the anti-rotation rib 43 with the anti-rotation groove 24. At this time, the inclined surface inside the main body portion 42 of the clamping block 4 just contacts the inclined surface matching portion 23 of the outer rod 2; subsequently, the user only needs to gradually rotate the lock sleeve 3, that is, the progress difference between the lock sleeve 3 relative to the outer rod 2 and the clamping block 4 can be used to gradually drive the clamping block 4 to slowly move in the first direction (i.e., the extending direction of the anti-rotation groove 24) until the cantilever 221 of the outer rod 2 is pressed.
[0069] Compared with the method of directly driving the clamping block 4 to move in the first direction, the above method utilizes the progress difference and can achieve a better labor-saving effect. Taking the pitch of the first external thread 21 and the first internal thread 311 as 4mm, and the pitch of the external thread 41 and the second internal thread 321 as 3.8mm, for such non-precision machined product parts, the pitch cannot reach a very small value. Therefore, in the prior art, that is, in the method in which the external thread is not provided on the outside of the clamping block 4, for each rotation of the locking sleeve 3, the driving distance of the clamping block 4 relative to the outer rod 2 is 1 pitch of the first internal thread 311, that is, 4mm. Therefore, the clamping block 4 squeezes the inner rod 2 more deeply, and each rotation of the locking sleeve 3, the force required is greater. However, in this design, since the locking sleeve 3 also moves relative to the block 4 when it rotates, the distance the locking sleeve 3 moves the block 4 relative to the outer rod 2 for each rotation of the locking sleeve 3 is equal to the thread pitch of the locking sleeve 3 threaded to the outer rod 2 (4 mm) minus the thread pitch of the locking sleeve 3 threaded to the block 4 (3.8 mm), which is 0.2 mm. Therefore, the locking sleeve 3 only moves the block 4 relative to the outer rod 2 for each rotation, which reduces the degree of compression on the outer rod 2 and reduces the force required by the user to rotate the locking sleeve 3. Obviously, the zigzag step design described in the above embodiment can also achieve a similar effect, namely, utilizing the longer travel of the locking sleeve 3 to disperse the progress of the block 4, similar to climbing a mountain using a winding road instead of a straight climb from the foot of the mountain to the top. Although the travel distance is longer, the force can be applied more gradually throughout the entire process.
[0070] Embodiment 2:
[0071] Another aspect of the present application also discloses a cleaning tool, such as Figure 10 , which includes a cleaning head 5 and the rod connecting device in the above embodiment. The cleaning head 5 is rotatably connected to the end of the inner rod 1 away from the outer rod 2. For cleaning tools, the cleaning head and the gripping rod are generally separated during the production and transportation process, and the user assembles them by himself after receiving the goods. The cleaning head 5 is generally rotatably connected to a part of the rod, which can be the inner rod 1 in the above embodiment. The outer rod 2 is generally connected to a gripping rod for the user to hold so that the user can operate the cleaning head 5 by holding the gripping rod during cleaning operations. Therefore, when the user assembles the inner rod 1 and the outer rod 2, a rod connecting device that saves operation effort is required to facilitate operation and improve user experience.
[0072] Further, in some embodiments, the outer rod 2 can be a single short rod, and it can also be connected with a grip rod 6. The outer rod 2 and the grip rod 6 can be assembled during the production and transportation process, for example, by interference fit or riveting. They can also be separated during the production and transportation process and then assembled by the user. It should be particularly noted that the way for the user to assemble the outer rod 2 and the grip rod 6 can be snap connection, interference connection, or the same connection method as that of the outer rod 2 and the inner rod 1 in the above embodiments, that is, lock sleeves 3 and blocks 4 are provided at both ends of the outer rod 2, and both ends can also expand and contract radially. One end is sleeved on the inner rod 1, and the other end is sleeved on the grip rod 6, and then the blocks 4 are respectively driven by the lock sleeves 3 for connection.
[0073] Further, the cleaning tools in the above embodiments include, but are not limited to, household cleaning tools such as mops, brooms, dustpans, windshield wipers, window cleaners, etc. Therefore, the cleaning head 5 can be a mop head, a broom head, a dustpan, a windshield wiper blade, a window cleaner, etc.
[0074] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.
Claims
1. A rod connection device, characterized in that, Comprising: Inner rod (1); Outer rod (2), the first end of which is radially telescopic and the first end is sleeved on the inner rod (1); Lock sleeve (3), sleeved on the outer rod (2); Block (4), arranged between the outer rod (2) and the lock sleeve (3) and in inclined surface cooperation with the first end of the outer rod (2); The lock sleeve (3) is provided with a first limiting section (31) for positioning with the outer rod (2) and a second limiting section (32) for positioning with the block (4). When an external force drives the lock sleeve (3) to rotate relative to the outer rod (2), in the first direction, the lock sleeve (3) has a first progress and a second progress relative to the outer rod (2) and the block (4) respectively, and the first progress is greater than the second progress, so that the lock sleeve (3) drives the block (4) to move in the first direction, thereby squeezing the first end of the outer rod (2) to radially contract and press tightly against the inner rod (1) to connect the inner rod (1) and the outer rod (2); Wherein the first direction is along the axial direction of the outer rod (2) and points from the first end of the outer rod (2) to the second end away from the first end.
2. The rod connecting device according to claim 1, wherein, The second limiting section (32) has a second internal thread (321), the outer side of the block (4) has a second external thread (41), and the lock sleeve (3) and the block (4) are screwed together through the second internal thread (321) and the second external thread (41) to form a position.
3. The rod connecting device according to claim 2, wherein The first limiting section (31) has a first internal thread (311), the first end of the outer rod (2) has a first external thread (21), and the lock sleeve (3) and the outer rod (2) are screwed together through the first internal thread (311) and the first external thread (21) to form a position.
4. The rod connection device according to claim 3, characterized in that, The pitch of the first internal thread (311) is greater than the pitch of the second internal thread (321), so that when the lock sleeve (3) rotates, it has a first progress and a second progress relative to the outer rod (2) and the block (4) respectively, and the first progress is greater than the second progress.
5. The rod connecting device according to any one of claims 1-4, characterized in that, The first end of the outer rod (2) has a telescopic part (22), and the block (4) is in inclined surface cooperation with the telescopic part (22). When the lock sleeve (3) drives the block (4) to move in the first direction, the block (4) squeezes the telescopic part (22) to radially contract and press tightly against the inner rod (1) along the outer rod (2).
6. The rod connection device according to claim 5, characterized in that, The telescopic part (22) includes a plurality of cantilevers (221) arranged circumferentially along the outer rod (2), and the cantilevers (221) extend in the first direction.
7. The rod connecting device according to claim 6, characterized in that, The free end of the cantilever (221) is in inclined surface cooperation with the block (4). When the lock sleeve (3) drives the block (4) to move in the first direction, the block (4) squeezes the free end of the cantilever (221), so that the cantilever (221) bends towards the inner side of the outer rod (2), and then presses tightly against the inner rod (1).
8. The rod connection device according to any one of claims 1-4, 6, and 7, characterized in that The first end of the outer rod (2) includes an inclined surface mating portion (23). Along the first direction, the outer diameter of the inclined surface mating portion (23) shows an increasing trend, such that the outer side of the inclined surface mating portion (23) is formed into an inclined surface facing the clamping block (4).
9. The rod connecting device according to claim 8, characterized in that, When the first end of the outer rod (2) has a telescopic portion (22), and the telescopic portion (22) includes a plurality of cantilevers (221) arranged circumferentially along the outer rod (2), the inclined surface mating portion (23) is located at the free end of the cantilever (221).
10. The rod connecting device according to any one of claims 1-4, 6, 7, 9, characterized in that, The clamping block (4) includes a main body portion (42), and the main body portion (42) is sleeved on the first end of the outer rod (2) and is in inclined surface mating with the first end of the outer rod (2).
11. The rod connecting device according to claim 10, characterized in that, Along the first direction, the inner diameter of the main body portion (42) shows a decreasing trend, such that the inner side of the main body portion (42) is formed into an inclined surface facing the outer rod (2).
12. The rod connection device according to claim 11, wherein, When the first end of the outer rod (2) includes the inclined surface mating portion (23), the inner side of the main body portion (42) mates with the inclined surface mating portion (23). When the lock sleeve (3) drives the clamping block (4) to move along the first direction, the inner side of the main body portion (42) presses the inclined surface mating portion (23), causing the first end of the inner rod (1) to contract radially.
13. The rod connecting device according to any one of claims 1-4, 6, 7, 9, 11, 12, characterized in that, A rotation prevention structure is provided between the clamping block (4) and the outer rod (2). When an external force drives the lock sleeve (3) to rotate relative to the outer rod (2), the rotation prevention structure restricts the relative rotation between the clamping block (4) and the outer rod (2).
14. The rod connection device according to claim 13, characterized in that, The clamping block (4) is provided with a rotation prevention rib (43) extending along the first direction, and the outer rod (2) is provided with a rotation prevention groove (24) extending along the first direction. The rotation prevention rib (43) and the rotation prevention groove (24) cooperate to form a rotation prevention structure.
15. The rod connection device according to claim 14, characterized in that, The clamping block (4) includes a main body portion (42), and the rotation prevention rib (43) is provided on the inner side of the main body portion (42); the first end of the outer rod (2) has a telescopic portion (22), and the telescopic portion (22) includes a plurality of cantilevers (221) arranged circumferentially along the outer rod (2), and the rotation prevention groove (24) is formed as the gap between any two adjacent cantilevers (221).
16. A cleaning tool, characterized in that, It includes a cleaning head (5) and the rod connecting device according to any one of claims 1 - 15. The cleaning head (5) is rotatably connected to the end of the inner rod (1) away from the outer rod (2).
17. The cleaning tool according to claim 16, characterized in that, It further includes a grip rod (6) fixedly connected to the end of the outer rod (2) away from the inner rod (1).
18. The cleaning tool according to claim 17, wherein, The cleaning head (5) is a mopping head.