Rod connection structure and mop rod comprising same

Abstract

A rod connection structure and a mop rod comprising the rod connection structure. The rod connection structure comprises a rod body, which comprises a first rod body (1) and a second rod body (2), wherein the lower end of the first rod body (1) has a hollow space (3), and the hollow space (3) forms an opening on the end face of the lower end of the first rod body (1); one end of the second rod body (2) is provided with an insertion portion (4), and the insertion portion (4) of the second rod body (2) is inserted into the hollow space (3) of the first rod body (1) through the opening at the lower end of the first rod body (1), such that the second rod body (2) is connected to the first rod body (1); the first rod body (1) is a metal rod body, and the edge of the opening of the first rod body (1) is flared outwards to form an outward protruding portion.

Description

A rod connection structure and its mop handle Technical Field

[0001] This utility model relates to a rod connection structure. Background Technology

[0002] The handles of mops, brooms, dustpans, etc., typically consist of a first handle and a second handle. The lower end of the first handle has a hollow space, which forms an opening on the end face of the lower end of the first handle. One end of the second handle has an insertion part. The insertion part of the second handle is inserted into the hollow space of the first handle through the opening at the lower end of the first handle, thereby connecting the second handle to the first handle. Technical issues

[0003] The existing rod has the following drawback: because the lower end of the first rod has an opening, the rod is prone to breakage at the opening when subjected to force. Technical solutions

[0004] In order to overcome the above-mentioned shortcomings of existing rods, this utility model provides a rod connection structure with a longer service life.

[0005] The technical solution of this utility model to solve its technical problem is: a rod connection structure, including a rod body, the rod body including a first rod body and a second rod body, the lower end of the first rod body has a hollow space, and the hollow space forms an opening on the end face of the lower end of the first rod body;

[0006] One end of the second rod is provided with an insertion part, which is inserted into the hollow space of the first rod through the opening at the lower end of the first rod, thereby connecting the second rod to the first rod;

[0007] The first rod is a metal rod, and the open edge of the first rod has an outward protrusion.

[0008] Furthermore, the first rod is formed by winding a sheet of metal and welding it at the joint, thus forming a weld at the joint.

[0009] The second rod includes a shaft, a connecting part, and an insertion part. The insertion part is connected to one end of the shaft through the connecting part, and the diameter of the insertion part is at least smaller than the diameter of the shaft portion connected to the connecting part.

[0010] The protruding portion is a rolled edge that extends outward from the open edge of the first rod body, at least at the weld, and the rolled edge has an arc-shaped surface.

[0011] Furthermore, the arc-shaped surface of the rolled edge of the first rod abuts against the outer surface of the connecting part of the second rod.

[0012] Furthermore, the end of the rolled edge is rolled over the highest point of the rolled edge.

[0013] Furthermore, the rolled edge is a rolled edge that extends outward from the open edge of the first rod body, and all or part of the rolled edge is in contact with the connecting part.

[0014] Furthermore, the rolled edge is rolled into a ring with a circular or elliptical cross-section.

[0015] Furthermore, the connecting portion has an oblique top contact wall, and the arc-shaped surface of the rolled edge abuts against the outer surface of the top contact wall.

[0016] Furthermore, the top contact wall is a concave arc surface, or the outer wall is a sloping plane.

[0017] Furthermore, the second rod is detachably connected to the first rod.

[0018] Furthermore, a first connector is provided in the hollow space of the first rod, or a first connector is formed on the side wall of the hollow space of the first rod.

[0019] The second rod's insertion portion is fixedly connected to a second connector, or the second connector is formed on the insertion portion of the second rod.

[0020] The second connector is connected to the first connector, so that the second rod is connected to the first rod.

[0021] Furthermore, the first connecting member is a threaded sleeve with internal threads, and the second connecting member is a threaded head with external threads. The external threads are adapted to the internal threads, and the threaded head is screwed into the threaded sleeve when the first rod body is connected to the second rod body.

[0022] Furthermore, the shaft, connecting part, and insertion part of the second rod are integrated; and / or, the second rod is a metal rod formed by winding sheet metal and welding it at the joint.

[0023] A mop handle comprising the aforementioned handle connection structure. Beneficial effects

[0024] The beneficial effects of this utility model are as follows: because the open edge of the first rod body has an outward protrusion, the strength of the open part is strengthened, making the first rod body less prone to damage at its open part, thereby increasing the service life of the rod. Attached Figure Description

[0025] Figure 1 is a structural schematic diagram of the mop handle of this utility model.

[0026] Figure 2 is an exploded view of the mop handle of this utility model.

[0027] Figure 3 is an exploded view of the mop handle of this utility model from another perspective.

[0028] Figure 4 is a cross-sectional view of the connection between the first and second rods.

[0029] Figure 5 is a magnified view of part A in Figure 4.

[0030] Figure 6 is a schematic diagram of another form of surface contact between the protruding part and the connecting surface.

[0031] Figure 7 is a schematic diagram of another form of surface contact between the protruding part and the connecting surface.

[0032] Figure 8 is a schematic diagram of another form of surface contact between the protruding part and the connecting surface.

[0033] Figure 9 is a schematic diagram of another form of surface contact between the protruding part and the connecting surface.

[0034] Figure 10 is a schematic diagram of another form of surface contact between the protruding part and the connecting surface. Embodiments of the present invention

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] Referring to Figures 1-10, a rod connection structure includes rod bodies, wherein the rod bodies include a first rod body 1 and a second rod body 2. Typically, the first rod body 1 and the second rod body 2 are made of metal, but they can also be made of non-metallic materials. When the first rod body 1 and the second rod body 2 are made of metal, to facilitate forming and save costs, the first rod body 1 and the second rod body 2 can be formed in the following way: both the first rod body 1 and the second rod body 2 are formed by rolling metal sheets and welding them at the joint, thereby forming a weld at the joint.

[0037] The lower end of the first rod 1 has a hollow space 3, which forms an opening on the end face of the lower end of the first rod 1. When the first rod 1 is formed by rolling metal sheet and welding it at the joint, a hollow space 3 and an opening are naturally formed at the lower end of the first rod 1. One end of the second rod 2 is provided with an insertion part 4. The insertion part of the second rod 2 is inserted into the hollow space 3 of the first rod 1 through the opening at the lower end of the first rod 1, thereby connecting the second rod 2 to the first rod 1. The edge of the opening of the first rod 1 has an outwardly protruding part, which strengthens the opening and makes the first rod 1 less prone to breakage at its opening, thereby increasing the service life of the rod.

[0038] In one embodiment, a first connector is provided in the hollow space of the first rod 1, and a second connector is fixedly connected to the insertion part 4 of the second rod 2. The second connector is connected to the first connector, so that the second rod 2 is connected to the first rod 1. To facilitate the assembly and disassembly of the first rod 1 and the second rod 2, the second rod 2 is detachably connected to the first rod 1. One detachable connection method is as follows: the first connector has a threaded sleeve 5 with internal threads, and the second connector specifically has a threaded head 6 with external threads. The external threads are adapted to the internal threads. When the first rod 1 and the second rod 2 are connected, the threaded head 6 is screwed into the threaded sleeve 5. Of course, the first connector and the second connector can also adopt other methods. For example, the first connector is a connecting sleeve with a wedge groove inside, and the second connector is a wedge head with a wedge block adapted to the wedge groove. When the first rod and the second rod are connected, the wedge block is inserted into the wedge groove until the outward protrusion abuts against the connecting surface.

[0039] Of course, the first connector can also be formed on the side wall of the hollow space 3 of the first rod body 1, that is, the first connector is formed in the hollow space 3 of the first rod body, rather than being a separate component; the second connector can also be formed on the insertion part 4, rather than being a separate component. For example, the first connector is a thread formed on the side wall of the hollow space 3 of the first rod body, and the second connector is a thread formed on the insertion part 4, with the two threads being compatible.

[0040] In one embodiment, the second rod 2 includes a shaft 7, a connecting portion 8, and an insertion portion 4. The insertion portion 4 is connected to one end of the shaft 7 via the connecting portion 8. The diameter of the insertion portion 6 is at least smaller than the diameter of the shaft portion connected to the connecting portion 8, that is, the diameter of the shaft portion connected to the connecting portion 8 is larger than the diameter of the insertion portion 4. The diameter of other parts of the shaft can be smaller than, greater than, or equal to the diameter of the insertion portion. Typically, the shaft 7, connecting portion 8, and insertion portion 4 of the second rod are integrated. The protruding portion is a rolled edge 9 formed by the plate of the open edge of the first rod 1, at least at the weld seam. The rolled edge 9 has an arc-shaped surface. The arc-shaped surface of the rolled edge 9 of the first rod 1 abuts against the outer surface of the connecting portion 8 of the second rod 2, that is, when the first rod and the second rod are connected, it continues until the arc-shaped surface of the rolled edge 9 of the first rod abuts against the outer surface of the connecting portion 8 of the second rod. The so-called "curled edge" refers to the fact that the plate of the open edge of the first rod not only turns outward, but also curls inward towards the first rod 1.

[0041] The aforementioned structure specifically addresses the configuration where both the first rod 1 and the second rod 2 are formed by winding metal sheets and welding them at the seams, thus creating a weld at the seams. Generally, mop handles, broom handles, dustpan handles, etc., are made of metal. For these household cleaning products, using seamless metal tubing is too costly. Therefore, using metal cladding material to wind and then weld the joints to form the rods saves costs. However, this method also presents a significant problem: because the first and second rods 1 are welded tubes formed by winding and welding, stress concentration occurs at the weld seams. During use, external forces may press or act on the rods. Under these external forces (especially with mop and broom handles, where the pressure on the rods is particularly high), stress concentration can occur. The force is further concentrated at the point where the first and second rods support each other. Since the sidewall of the open part of the first rod is basically linear, it is difficult to effectively disperse the stress, which can easily lead to a break at the weld end of the first rod at the open part. Once a break occurs at the weld end, the weld can easily be torn apart during subsequent operations. In addition, under the action of external force, the open part of the first rod is also prone to deformation and opening. For these two reasons, the service life of the rod is relatively short, and a large gap will form between the first and second rods after a period of use, causing them to loosen.

[0042] In existing technologies, there are also attempts to solve this problem by fitting a plastic sleeve between the first rod and the second rod. However, even with a plastic sleeve, due to the softness and deformability of plastic itself, the plastic sleeve can only delay the damage or deformation of the lower end of the first rod, but cannot effectively solve the problem.

[0043] Although the technical solution of this utility model still has the problem of stress concentration at the weld, the weld at the open end of the first rod has an outwardly turned-out rolled edge 9. The rolled edge 9 abuts against the connecting part 8 with its arc-shaped surface, increasing the contact area between them. Therefore, when external force is applied to the rod, the stress can be effectively dispersed, making it less likely for a break to occur at the weld end of the lower end of the first rod. In addition, the outwardly turned-out rolled edge 9 also strengthens the weld and further increases the difficulty of tearing. Furthermore, since the rolled edge 9 abuts against the connecting surface with its arc-shaped surface, the contact area between them is relatively large, and the friction between them is also greater, making it easier to lock the first rod 1 and the second rod 2 and less likely to loosen. Based on the above beneficial effects, it is also unnecessary to put a plastic sleeve between the first rod 1 and the second rod 2.

[0044] In one embodiment, the rolled edge 9 is a rolled edge that extends outward from the open edge of the first rod body. All or part of this rolled edge abuts against the connecting portion. A rolled edge 9 extending outward from the entire open edge of the first rod body 1 is more convenient to form, and it also enhances the strength of the open area, making it less prone to deformation and tearing at the weld. Alternatively, multiple rolled edges can extend outward from the open edge of the first rod body 1, with these edges separate and unconnected.

[0045] In one embodiment, the end of the rolled edge 9 is rolled over the highest point of the rolled edge 9, meaning the end of the rolled edge 9 is hidden inside the rolled edge 9 and cannot be touched by the operator. The significance of this structure is that, in the prior art, the metal plate at the open end of the first rod 1 forms a relatively sharp blade, which can easily cut the operator during use. This is one of the reasons why a plastic sleeve is sometimes used between the first rod 1 and the second rod 2 in the prior art. However, since the end of the rolled edge 9 is rolled over the highest point of the rolled edge, and the end of the rolled edge 9 is hidden inside the rolled edge 9 and cannot be touched by the operator, the problem of the operator being cut by the blade during use is eliminated, and therefore, the plastic sleeve between the first rod 1 and the second rod 2 is no longer needed.

[0046] In one embodiment, as shown in Figures 4, 5, 6, and 7, the rolled edge 7 is rolled into a ring with a circular or elliptical cross-section. From a manufacturing perspective, compared to other shapes, rolling the lower end of the first rod 1 outwards to form a ring with a circular or elliptical cross-section is basically the simplest, and the circular or elliptical ring has no sharp edges, making it easier to distribute stress. Of course, "circular cross-section" here means that the cross-section is basically circular, not necessarily perfectly circular. "Elliptical cross-section" here means that the cross-section is basically elliptical, not necessarily perfectly elliptical.

[0047] Of course, the outwardly convex part of the lower end of the first rod 1 can also take other forms, such as the outwardly convex part shown in Figure 8 being an outwardly convex right-angle flange 10, or the outwardly convex part shown in Figure 9 being an outwardly convex inclined plane flange 11, or the outwardly convex part shown in Figure 10 being an outwardly convex arc-shaped flange 12.

[0048] In one embodiment, the connecting part 8 has an inclined top contact wall, and the arc-shaped surface of the rolled edge 9 abuts the outer surface of the top contact wall. The inclined top contact wall not only makes it easier to form the rod body 7, the connecting part 8, and the insertion part 4 in one piece, but also allows the rolled edge 9 and the top contact wall to have more contact. In particular, it is preferred that the top contact wall is a concave arc surface. For example, in Figures 4 and 5, the rolled edge 9 is a ring with a basically circular cross-section, and the top contact wall of the connecting part 8 is a concave arc surface. At this time, the arc surface of the circular rolled edge and the concave arc surface can form a large area of ​​contact. As shown in Figure 7, the rolled edge 9 is a ring with a basically circular cross-section, and the top contact wall of the connecting part 8 is an inclined plane located on the outer wall of the second rod 2. At this time, the arc surface of the circular rolled edge and the inclined plane can also form a large area of ​​contact. As shown in Figure 9, the outward convex part is an outwardly turned inclined plane flange 11, and the top contact wall of the connecting part 8 is an inclined plane located on the outer wall of the second rod. The inclined plane flange 11 can form a large area of ​​contact with the top contact wall of the inclined plane. As shown in Figure 10, the outward convex part is an outwardly turned arc-shaped flange 12, and the top contact wall of the connecting part 8 is a concave arc-shaped inclined surface. The arc-shaped flange 12 can form a large area of ​​contact with the concave arc-shaped inclined surface.

[0049] Of course, the connecting part 8 can also take other forms. As shown in Figure 6, the rolled edge 9 is a ring with a cross-section that is basically circular, and the connecting part 8 is a horizontal radial step surface that connects the insertion part and the rest of the second rod. In this case, the arc surface of the circular rolled edge can also form a large area of ​​contact with the horizontal step surface. As shown in Figure 8, the outward protrusion is a right-angle flange 10 that is turned outward, and the connecting part 8 is a horizontal radial step surface that connects the insertion part and the rest of the second rod. The right-angle rolled edge can form a large area of ​​contact with the horizontal step surface.

[0050] The aforementioned rod connection structure can be applied to mop handles, broom handles, dustpan handles, etc., which include the rod connection structure described above.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The embodiments of this utility model have been described above. However, this utility model is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rod connection structure, comprising a rod body, the rod body including a first rod body and a second rod body, the lower end of the first rod body having a hollow space, the hollow space forming an opening on the end face of the lower end of the first rod body; One end of the second rod is provided with an insertion part, which is inserted into the hollow space of the first rod through the opening at the lower end of the first rod, thereby connecting the second rod to the first rod; Its features are: The first rod is a metal rod, and the open edge of the first rod has an outward protrusion.

2. The rod connection structure as described in claim 1, characterized in that: The first rod is formed by rolling a sheet of metal and welding it at the joint, thus forming a weld at the joint. The second rod includes a shaft, a connecting part, and an insertion part. The insertion part is connected to one end of the shaft through the connecting part, and the diameter of the insertion part is at least smaller than the diameter of the shaft portion connected to the connecting part. The protruding portion is a rolled edge that extends outward from the plate at least at the weld seam of the open edge of the first rod body, and the rolled edge has an arc-shaped surface.

3. The rod connection structure as described in claim 2, characterized in that: The curved surface of the rolled edge of the first rod abuts against the outer surface of the connecting part of the second rod.

4. The rod connection structure as described in claim 3, characterized in that: The end of the rolled edge is rolled over the highest point of the rolled edge.

5. The rod connection structure as described in claim 3, characterized in that: The rolled edge is a rolled edge that extends outward from the open edge of the first rod body, and all or part of the rolled edge is in contact with the connecting part.

6. The rod connection structure as described in claim 5, characterized in that: The rolled edge is formed into a ring with a circular or elliptical cross-section.

7. The rod connection structure as described in any one of claims 3-5, characterized in that: The connecting part has an oblique top contact wall, and the arc-shaped surface of the rolled edge abuts against the outer surface of the top contact wall.

8. The rod connection structure as described in claim 7, characterized in that: The top contact wall is in the shape of a concave arc, or the outer wall is in the shape of a sloping plane.

9. The rod connection structure as described in claim 1, characterized in that: The second rod is detachably connected to the first rod.

10. The rod connection structure as described in claim 9, characterized in that: The first connecting member is provided in the hollow space of the first rod, or the first connecting member is formed on the side wall of the hollow space of the first rod. The second rod's insertion portion is fixedly connected to a second connector, or the second connector is formed on the insertion portion of the second rod. The second connector is connected to the first connector, so that the second rod is connected to the first rod.

11. The rod connection structure as described in claim 10, characterized in that: The first connector is a threaded sleeve with internal threads, and the second connector is a threaded head with external threads. The external threads are adapted to the internal threads, and the threaded head is screwed into the threaded sleeve when the first rod body is connected to the second rod body.

12. The rod connection structure as described in claim 1, characterized in that: The shaft, connecting part, and insertion part of the second rod are integrated into one piece. And / or, the second rod is a metal rod formed by winding sheet metal and welding it at the joint.

13. A mop handle, characterized in that: The mop handle includes the rod connection structure as described in any one of claims 1-12.

Images