Connecting structure of rod and mop rod thereof

Abstract

A connecting structure of a rod comprises a rod body, the rod body comprises a first rod body and a second rod body, the lower end of the first rod body is provided with a hollow space, and the hollow space forms an opening in the end face of the lower end of the first rod body; an insertion part is arranged at one end of the second rod body, and the insertion part of the second rod body is inserted into the hollow space of the first rod body through the opening in the lower end of the first rod body, so that the second rod body is connected to the first rod body; the first rod body is a metal rod body, and the edge of an opening of the first rod body is turned outwards to form an outer protruding part. The invention further discloses a mop rod which comprises the connecting structure of the rod.

Description

Technical Field

[0001] The invention relates to a rod connection structure. Background Art

[0002] The rod body of a mop rod, broom, dustpan, etc. usually has the following structure: it includes 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 surface of the lower end of the first rod body; one end of the second rod body is provided with an insertion portion; the insertion portion of the second rod body is inserted into the hollow space of the first rod body through the opening at the lower end of the first rod body, so that the second rod body is connected to the first rod body.

[0003] The existing rod body has the disadvantage that, since an opening is formed at the lower end of the first rod body, the rod body is easily damaged at the opening after being subjected to force. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies of the existing rods, the present invention provides a rod connection structure with a longer service life.

[0005] The technical solution of the present invention to solve the technical problem is: a rod connection structure, comprising a rod body, the rod body comprising 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 surface of the lower end of the first rod body; An insertion portion is provided at one end of the second rod body, and the insertion portion of the second rod body is inserted into the hollow space of the first rod body through the opening at the lower end of the first rod body, so that the second rod body is connected to the first rod body; The first rod body is a metal rod body, and an open edge of the first rod body is turned outward to form an outer convex portion.

[0006] Furthermore, the first rod body is formed by winding a metal plate and then welding it at a joint, and a weld is formed at the joint; The second rod body comprises a rod shaft, a connecting portion and an inserting portion, wherein the inserting portion is connected to one end of the rod shaft through the connecting portion, and the diameter of the inserting portion is at least smaller than the diameter of the rod shaft portion connected to the connecting portion; The outer protrusion is a curled edge formed by the plate material at the open edge of the first rod body and turned outward at least at the weld, and the curled edge has an arc-shaped surface.

[0007] Furthermore, the arc surface of the curled edge of the first rod body abuts against the outer surface of the connecting portion of the second rod body.

[0008] Furthermore, the end of the curling edge is curled over the highest end point of the curling edge.

[0009] Furthermore, the curling edge is a circle of curling edge formed by turning the plate material at the open edge of the first rod body outward, and the whole or part of the circle of curling edge contacts with the connecting portion.

[0010] Furthermore, the curled edge is rolled into a ring with a circular or elliptical cross section.

[0011] Furthermore, the connecting portion has an inclined top-contact wall, and the arc surface of the curling edge contacts the outer surface of the top-contact wall.

[0012] Furthermore, the top contact wall is in the shape of an inwardly concave arc surface, or the outer wall is in the shape of an inclined plane.

[0013] Furthermore, the second rod body is detachably connected to the first rod body.

[0014] Furthermore, a first connecting member is provided in the hollow space of the first rod body, or a first connecting member is formed on a side wall of the hollow space of the first rod body. The insertion portion of the second rod body is fixedly connected with a second connecting piece, or the insertion portion of the second rod body is formed with a second connecting piece. The second connecting member is connected to the first connecting member so that the second rod body is connected to the first rod body.

[0015] Furthermore, the first connecting member is a screw sleeve with an internal thread, and the second connecting member is a screw head with an external thread, the external thread is adapted to the internal thread, and the screw head is screwed into the screw sleeve when the first rod body is connected to the second rod body.

[0016] Furthermore, the rod body, the connecting portion and the inserting portion of the second rod body are integrated into one piece; and / or the second rod body is a rod body made of metal material, which is formed by winding a plate and then welding it at a joint.

[0017] A mop rod comprises the above-mentioned rod connecting structure.

[0018] The beneficial effect of the present invention is that since the open edge of the first rod body is turned outward with an outer convex portion, the strength of the open portion is enhanced, so that the first rod body is not easily damaged at its open portion, thereby improving the service life of the rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the mop rod of the present invention.

[0020] Figure 2 It is an exploded view of the mop rod of the present invention.

[0021] Figure 3 It is an exploded view of the mop rod of the present invention from another perspective.

[0022] Figure 4 It is a cross-sectional view of the connection between the first rod body and the second rod body.

[0023] Figure 5 yes Figure 4 A partial enlarged view of part A.

[0024] Figure 6 It is a schematic diagram of another form of surface contact between the outer protrusion and the connecting surface.

[0025] Figure 7 It is a schematic diagram of another form of surface contact between the outer protrusion and the connecting surface.

[0026] Figure 8 It is a schematic diagram of another form of surface contact between the outer protrusion and the connecting surface.

[0027] Fig. 9 It is a schematic diagram of another form of surface contact between the outer protrusion and the connecting surface.

[0028] Fig.10 It is a schematic diagram of another form of surface contact between the outer protrusion and the connecting surface. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Reference Figure 1-Figure 10 A rod connection structure includes a rod body, wherein the rod body includes a first rod body 1 and a second rod body 2. Generally speaking, the first rod body 1 and the second rod body 2 are made of metal, but can also be made of non-metallic materials. When the first rod body 1 and the second rod body 2 are made of metal, in order to facilitate molding and save costs, the first rod body 1 and the second rod body 2 can be molded in this way: the first rod body 1 and the second rod body 2 are both formed by winding metal plates and then welding them at the joints, thereby forming a weld at the joints.

[0031] 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 surface of the lower end of the first rod body 1. When the first rod body 1 is formed by winding a metal plate and welding it at the joint, the hollow space 3 and the opening are naturally formed at the lower end of the first rod body 1. An insertion portion 4 is provided at one end of the second rod body 2, and the insertion portion 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, so that the second rod body 2 is connected to the first rod body 1. The edge of the opening of the first rod body 1 is turned outward with an outer convex portion, and the outer convex portion turned outward strengthens the strength of the opening, so that the first rod body 1 is not easily damaged at its opening, thereby improving the service life of the rod.

[0032] In one embodiment, a first connecting member is provided in the hollow space of the first rod body 1, and a second connecting member is fixedly connected to the insertion portion 4 of the second rod body 2, and the second connecting member is connected to the first connecting member, so that the second rod body 2 is connected to the first rod body 1. In order to facilitate the disassembly and assembly of the first rod body 1 and the second rod body 2, the second rod body 2 is detachably connected to the first rod body 1. A detachable connection method is: the first connecting member has a screw sleeve 5 with an internal thread, and the second connecting member can specifically adopt a screw head 6 with an external thread, and the external thread is adapted to the internal thread. When the first rod body 1 is connected to the second rod body 2, the screw head 6 is screwed into the screw sleeve 5. Of course, the first connecting member and the second connecting member can also adopt other methods, for example, the first connecting member is a connecting sleeve, and a wedge groove is provided in the connecting sleeve, and the second connecting member is a wedge head, and a wedge block adapted to the wedge groove is provided on the wedge head. When the first rod body and the second rod body are connected, the wedge block is inserted into the wedge groove until the outer protrusion is against the connection surface.

[0033] Of course, the first connecting member may also be formed on the side wall of the hollow space 3 of the first rod body 1, that is, the first connecting member is formed at the hollow space 3 of the first rod body, rather than being a separate component; the second connecting member may also be formed on the insertion portion 4, rather than being a separate component. For example, the first connecting member is a thread formed on the side wall of the hollow space 3 of the first rod body, and the second connecting member is a thread formed on the insertion portion 4, and the two threads are matched.

[0034] In one embodiment, the second rod body 2 comprises a rod body 7, a connecting portion 8 and an inserting portion 4, wherein the inserting portion 4 is connected to one end of the rod body 7 through the connecting portion 8, and the diameter of the inserting portion 6 is at least smaller than the diameter of the rod body portion connected to the connecting portion 8, that is, the diameter of the rod body connected to the connecting portion 8 is larger than the diameter of the inserting portion 4, while the diameter of other parts of the rod body can be smaller than, larger than, or equal to the diameter of the inserting portion. Generally speaking, the rod body 7, the connecting portion 8 and the inserting portion 4 of the second rod body are integrated. The outer protrusion is a curling edge 9 that is turned outward from the plate material of the open edge of the first rod body 1 at least at the weld, and the curling edge 9 has an arc surface, and the arc surface of the curling edge 9 of the first rod body 1 is in contact with the outer surface of the connecting portion 8 of the second rod body 2, that is, when the first rod body and the second rod body are connected, the arc surface of the curling edge 9 of the first rod body is in contact with the outer surface of the connecting portion 8 of the second rod body. The so-called “curling” means that the sheet material at the open edge of the first rod body is not only turned outward, but also curled inward toward the direction of the first rod body 1 .

[0035] The above structure is particularly aimed at the structure in which the first rod body 1 and the second rod body 2 are both formed by winding metal plates and then welding them at the joints, so as to form a weld at the joints. Generally speaking, mop rods, broom rods, dustpan rods, etc. are metal rods. For these household cleaning products, the cost of using seamless metal tubes is too high. Therefore, the rod body is formed by winding metal packaging materials and then welding them at the joints, which can save costs. However, this rod body also has a major problem: since the first rod body 1 and the second rod body 1 are welded tubes formed by winding, stress concentration will occur at the welds. When in use, there will be external force pressing or acting on the rod body. At this time, under the action of external force (especially mop and broom rods, which will press the rod body, so the external force on the rod body is particularly large), it should be The force is further concentrated on the mutual supporting point of the first rod body and the second rod body. Since the side wall of the open part of the first rod body is basically linear, it is difficult to effectively disperse the stress, which can easily lead to a crack at the end of the weld of the first rod body at the open part. Once a crack appears at the end of the weld, the weld can be easily torn apart when the operation is performed again. In addition, under the action of external force, the open part of the first rod body is also easily deformed and opened under the action of external force. Based on these two reasons, the service life of the rod body is relatively low, and a large gap will be generated between the first rod body and the second rod body after being used for a period of time, resulting in looseness.

[0036] In the prior art, there is also an attempt to solve this problem by putting a plastic sleeve between the first rod body and the second rod body. However, even if the plastic sleeve is put on, due to the soft and deformable properties of the plastic itself, the plastic sleeve can only delay the damage or deformation of the lower end of the first rod body, but cannot effectively solve the problem.

[0037] The technical solution of the present invention, although there is still a problem of stress concentration at the weld, the weld at the lower end of the first rod body is provided with an outward-turned curling edge 9, and the curling edge 9 is pressed against the connecting portion 8 with the arc surface, and the contact area between the two is relatively increased. Therefore, when an external force acts on the rod body, the stress can be effectively dispersed, and it is not easy to cause a crack at the end of the weld at the lower end of the first rod body. In addition, due to the provision of the outward-turned curling edge 9, the strength of the weld is also enhanced, and the difficulty of tearing is further improved; in addition, due to the curling edge 9 being pressed against the connecting surface with the arc surface and the connecting portion 8 with the arc surface, the contact area between the two is relatively increased, and the friction between the two is also relatively large, so the first rod body 1 and the second rod body 2 are easier to lock and are not easy to loosen. Based on the above beneficial effects, there is no need to set a plastic sleeve between the first rod body 1 and the second rod body 2.

[0038] In one embodiment, the curling edge 9 is a circle of curling edge turned outward from the plate at the open edge of the first rod body, and the whole or part of the curling edge contacts the connecting portion. The whole circle of curling edge 9 turned outward from the open edge of the first rod body 1 is more convenient when forming the curling edge 9, and the circle of curling edge 9 can also enhance the strength of the open part, making the open part less likely to deform and less likely to tear at the weld. Of course, the plate at the open edge of the first rod body 1 can also be multiple curling edges turned outward, and the multiple curling edges can be separated and not connected to each other.

[0039] In one embodiment, the end of the curling edge 9 is rolled over the highest end of the curling edge 9, that is, the end of the curling edge 9 is hidden inside the curling edge 9 and cannot be touched by the operator. The significance of this structure is that in the prior art, the metal sheet at the open end of the first rod body 1 will form a relatively sharp knife edge, and the operator is easily scratched by the knife edge when using it. This is also one of the reasons why a plastic sleeve is sometimes set between the first rod body 1 and the second rod body 2 in the prior art. After the end of the curling edge 9 is rolled over the highest end of the curling edge, the end of the curling edge 9 is hidden inside the curling edge 9 and cannot be touched by the operator, so there will be no problem of the operator being cut by the knife edge when using it, and of course, there is no need to set a plastic sleeve between the first rod body 1 and the second rod body 2.

[0040] In one embodiment, Figure 4 , 5 As shown in , 6, and 7, the curling edge 7 is rolled up into a ring with a circular or elliptical cross section. From a process point of view, compared with other shapes, rolling the lower end of the first rod body 1 outward to form a ring with a circular or elliptical cross section is basically the simplest, and the circular or elliptical ring has no edges and corners, which is easier to disperse stress. Of course, the "circular cross section" here means that the cross section is basically circular, and it is not required to be an absolute circle. The "elliptical cross section" here means that the cross section is basically elliptical, and it is not required to be an absolute ellipse.

[0041] Of course, the outer convex portion of the lower end of the first rod body 1 that is open and turned outward can also be in other forms, such as Figure 8 The outer protrusion is a right-angle flange 10 turned outward, or Fig. 9 The outer protrusion is an outwardly turned inclined plane flange 11, or as Fig.10 The outer protrusion shown is an arc-shaped flange 12 turned outward.

[0042] In one embodiment, the connecting portion 8 has an inclined top contact wall, and the arc surface of the curling edge 9 touches the outer surface of the top contact wall. The inclined top contact wall is not only easier to form when the shaft 7, the connecting portion 8, and the insertion portion 4 are integrally formed, but also enables the curling edge 9 and the top contact wall to achieve more contact. It is particularly preferred that the top contact wall is in a concave arc shape. Figure 4 , Figure 5 In the embodiment, the curling edge 9 is a ring with a substantially circular cross section, and the top contact wall of the connecting portion 8 is in the shape of an inwardly concave arc surface. At this time, the arc surface of the circular curling edge and the inwardly concave arc surface can form a contact with a larger area; another example Figure 7 In the embodiment, the curling edge 9 is a ring with a substantially circular cross section, and the top contact wall of the connecting portion 8 is an inclined plane located on the outer wall of the second rod body 2. In this case, the arc surface of the circular curling edge and the inclined plane can also form a relatively large contact area; Fig. 9 In the embodiment, the outer convex portion is an outwardly turned inclined plane flange 11, the top contact wall of the connecting portion 8 is an inclined plane located on the outer wall of the second rod body, and the inclined plane flange 11 can form a large area of ​​contact with the top contact wall of the inclined plane; and another embodiment Fig.10 In the embodiment, the outer convex portion is an outwardly turned arc-shaped flange 12, and the top contact wall of the connecting portion 8 is an inwardly concave arc-shaped inclined surface. The arc-shaped flange 12 can form a relatively large contact area with the inwardly concave arc-shaped inclined surface.

[0043] Of course, the connecting portion 8 may also be in other forms, such as Figure 6 In the embodiment, the curling edge 9 is a ring with a substantially circular cross section, and the connecting portion 8 is a horizontal radial step surface connecting the inserting portion and the rest of the second rod body. In this case, the arc surface of the circular curling edge and the horizontal step surface can also form a relatively large contact area; Figure 8 In the embodiment, the outer convex portion is a right-angle flange 10 turned outward, and the connecting portion 8 is a horizontal radial step surface connecting the insertion portion and the rest of the second rod body. The right-angle flange can form a large area of ​​contact with the horizontal step surface; The above-mentioned rod connection structure can be applied to a mop rod, a broom rod, a dustpan rod, etc., which includes the rod connection structure as described above.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rod connection structure, comprising a rod body, wherein the rod body comprises a first rod body and a second rod body, wherein the lower end of the first rod body has a hollow space, and the hollow space forms an opening on the end surface of the lower end of the first rod body; An insertion portion is provided at one end of the second rod body, and the insertion portion of the second rod body is inserted into the hollow space of the first rod body through the opening at the lower end of the first rod body, so that the second rod body is connected to the first rod body; Features: The first rod body is a metal rod body, and an open edge of the first rod body is turned outward to form an outer convex portion.

2. The rod connection structure according to claim 1, characterized in that: The first rod body is formed by winding a metal plate and then welding it at a joint, forming a weld at the joint; The second rod body comprises a rod shaft, a connecting portion and an inserting portion, wherein the inserting portion is connected to one end of the rod shaft through the connecting portion, and the diameter of the inserting portion is at least smaller than the diameter of the rod shaft portion connected to the connecting portion; The outer protrusion is a curled edge formed by the plate material at the open edge of the first rod body and turned outward at least at the weld, and the curled edge has an arc-shaped surface.

3. The rod connection structure according to claim 2, characterized in that: The arc surface of the curled edge of the first rod body abuts against the outer surface of the connecting portion of the second rod body.

4. The rod connection structure according to claim 3, characterized in that: The end of the curling edge is curled over the highest end point of the curling edge.

5. The rod connection structure according to claim 3, characterized in that: The curling edge is a circle of curling edge that is turned outward from the plate material at the open edge of the first rod body, and the whole or part of the circle of curling edge contacts with the connecting portion.

6. The rod connection structure according to claim 5, characterized in that: The curled edge is rolled up into a ring with a circular or elliptical cross section.

7. The rod connection structure according to any one of claims 3 to 5, characterized in that: The connecting portion has an inclined top-contact wall, and the arc surface of the curling edge contacts the outer surface of the top-contact wall.

8. The rod connection structure according to claim 7, characterized in that: The top contact wall is in the shape of an inwardly concave arc surface, or the outer wall is in the shape of an inclined plane.

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

10. The rod connection structure according to claim 9, characterized in that: A first connecting member is disposed in the hollow space of the first rod body, or a first connecting member is formed on a side wall of the hollow space of the first rod body. The insertion portion of the second rod body is fixedly connected with a second connecting piece, or the insertion portion of the second rod body is formed with a second connecting piece. The second connecting member is connected to the first connecting member so that the second rod body is connected to the first rod body.

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

12. The rod connection structure according to claim 1, characterized in that: The shaft, the connecting portion and the inserting portion of the second rod body are integrated into one body. And / or, the second rod body is a rod body made of metal material, which is formed by winding a plate and then welding it at a joint.

13. A mop rod, characterized in that: The mop rod comprises the rod connection structure according to any one of claims 1-12.

Images