KR20210075713A - Broom for cleaning with fastening structure for easy assembly - Google Patents

Abstract

A cleaning broom with a fastening structure for easy assembly according to an embodiment of the present invention comprises: a pipe-shaped housing with opened upper and lower ends; a central rod which is formed in a hollow shape, is arranged in a center unit of the housing, and forms a ring type space unit between the central rod and the inner circumferential surface of the housing; a plurality of comb teeth which are inserted into the ring type space unit of the housing, are fixed by an adhesive, and sweep a cleaning object; and a connecting member which is detachably combined with an upper part of the housing, and includes a hollow connecting rod communicating with the central rod A first protrusion unit protruding inward is formed on the inner circumferential surface of the housing. A second protrusion unit protruding outward is formed on the outer circumferential surface of the central rod. The cleaning broom with a fastening structure for easy assembly is fixed by pressing the comb teeth inserted into the ring type space unit.

Description

A broom for cleaning with a fastening structure that is easy to assemble {BROOM FOR CLEANING WITH FASTENING STRUCTURE FOR EASY ASSEMBLY}

The present invention relates to a cleaning broom having a fastening structure that is easy to assemble, and more particularly, to a cleaning broom having a fastening structure capable of firmly fixing comb teeth without using an adhesive.

When sweeping the yard or clearing snow, we use cleaning brooms.

The cleaning broom includes a handle part that can be held by hand, a comb part to which a plurality of comb teeth are tied, and a connection part for connecting the comb part and the handle part.

There are several types of cleaning brooms. There is a form that uses plastic, and there is a form that uses cypress wood.

In the past, the use of cleaning brooms using plastic has gradually increased from the cleaning brooms using cypress. A cleaning broom made of plastic has advantages of being easy to manufacture and having good durability.

In order to solve environmental problems, it is necessary to reduce the use of plastics.

It is necessary to avoid the use of a cleaning broom made of plastic, and furthermore, it is necessary to form all components of the cleaning broom with a perishable or recyclable material. In addition, cleaning brooms made of materials that can rot or recycle all components are easy to manufacture, so they must have price competitiveness compared to cleaning brooms made of plastic.

Registered Patent No. 10-1875096 discloses a cleaning broom using coconut tree branches as comb teeth. However, in the above registered patent, all the connecting members are made of plastic. In other words, it still has environmental problems.

Above all, the above registered patent requires an adhesive to fix the comb teeth. In the above registered patent, when one tooth falls out, there is room in the fixed part of the tooth, and the problem of the comb teeth falling out in series is solved with an adhesive. Looking at the manufacturing method of the above registered patent, a space part is formed by combining the housing and the central rod, and the comb teeth are attached to the space part. insert Then apply the adhesive on top of the comb teeth. After all, the above registered patent inevitably requires the steps of applying the adhesive and curing the adhesive for at least a certain period of time.

Therefore, there is a need for a cleaning broom that is environmentally friendly and easy to assemble at the same time as all components are made of perishable or recyclable materials. Furthermore, the cleaning broom manufactured in this way should have sufficient durability because the teeth do not fall out easily.

An object of the present invention is to solve the above-described problems, and therefore, it is an object of the present invention to provide a cleaning broom that is eco-friendly and can be easily assembled to have price competitiveness by making all components of perishable or recyclable materials. Further, while achieving the above object, it is an object of the present invention to provide a cleaning broom having sufficient durability because comb teeth do not easily fall out.

On the other hand, other objects not specified in the present invention will be additionally considered within the range that can be easily inferred from the following detailed description and effects thereof.

In order to achieve the above object, a cleaning broom according to an embodiment of the present invention includes: a tubular housing having an upper end and an open lower end; a central rod having a hollow shape and disposed in the center of the housing to form a ring-shaped space between the inner circumferential surface of the housing; a plurality of comb teeth inserted into the annular space inside the housing and fixed by an adhesive to sweep the object to be cleaned; and a connecting member detachably coupled to the upper portion of the housing and having a hollow connecting rod that communicates with the central rod and is formed, wherein a first protrusion protruding inwardly is formed on an inner circumferential surface of the housing, and the central rod A second protrusion protruding outwardly is formed on the outer circumferential surface of the , and it is characterized in that the comb teeth inserted into the annular space are pressed and fixed.

In one embodiment, the first protrusion and the second protrusion are arranged to be shifted from each other so that the comb teeth inserted into the annular space are bent.

In one embodiment, the first protrusion is formed by rolling one end of the housing inward, whereby the comb teeth are elastically pressed when the teeth are inserted.

In one embodiment, the first protrusion protrudes helically inward from the inner circumferential surface of the housing, and the second protrusion helically protrudes from the outer circumferential surface of the central rod.

In one embodiment, the first protrusion and the second protrusion are engaged with each other so as to be shifted from each other so as to be screwed with the comb teeth inserted into the annular space therebetween.

In one embodiment, it is inserted along the outer circumferential surface of the central rod in the direction in which the comb teeth are inserted and further comprises an inserted wedge-shaped second protrusion, wherein the wedge-shaped second protrusion additionally presses and fixes the comb teeth. do.

In one embodiment, the housing, the central rod and the connecting member are characterized in that the recyclable metal material.

In one embodiment, the comb teeth are coconut palm branches.

In the cleaning broom according to an embodiment of the present invention, a first protrusion protruding inwardly is formed on the inner circumferential surface of the housing, and a second protrusion protruding outwardly is formed on the outer circumferential surface of the central rod, and the comb teeth inserted into the annular space. Since the first protrusion and the second protrusion press and fix the comb teeth, one end of the comb teeth is aligned to surround the central rod and the housing is lowered from the other end of the comb teeth in the direction of the central rod in the direction of the central rod. Since it is fixed under pressure, it has the advantage of being able to easily assemble the cleaning broom.

On the other hand, in the cleaning broom according to an embodiment of the present invention, the housing, the central rod, and the connecting member constituting the fastening structure are all made of recyclable metal materials, the comb teeth are made of coconut palm branches, and the handle is made of wood. environmental pollution can be prevented.

Above all, the cleaning broom according to an embodiment of the present invention uses a coconut palm branch as a comb, and the coconut palm branch has good elasticity and is not easily broken even when pressed by the first and second projections. have.

1 is a schematic exploded perspective view of a cleaning broom according to an embodiment of the present invention.
2 is a schematic cross-sectional view of a fastening structure of a cleaning broom according to an embodiment of the present invention.
3 is a schematic cross-sectional view of a state in which comb teeth are inserted into the fastening structure of a cleaning broom according to an embodiment of the present invention, and is a schematic cross-sectional view in a narrow mode state.
4 is a schematic exploded perspective view for explaining an embodiment in which the first protrusion and the second protrusion are spirally formed on the housing and the central rod.
5 is a schematic cross-sectional view of the fastening structure of the embodiment of FIG.
6A is a schematic cross-sectional view for explaining an embodiment in which a first protrusion formed on the housing is formed by rolling one end of the housing.
Figure 6b is a schematic cross-sectional view for explaining the insertion of the wedge-shaped second protrusion at one end of the central rod to fix the comb portion.
Figure 7 is a schematic cross-sectional view for explaining the coupling of the connecting rod and the assembly, a state before the connectors are coupled.
8 is a state after the connectors are coupled through screw fastening in the state of FIG. 7 .
9 is a schematic cross-sectional view of the cleaning broom shown in FIG. 3 after changing its posture to a wide mode state.
※ It is revealed that the attached drawings are exemplified as a reference for understanding the technical idea of the present invention, and the scope of the present invention is not limited thereby.

In the description of the present invention, if it is determined that the subject matter of the present invention may be unnecessarily obscured as it is obvious to those skilled in the art with respect to related known functions, the detailed description will be omitted.

1 is a schematic exploded perspective view of a cleaning broom according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of a fastening structure of a cleaning broom according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention A schematic cross-sectional view of a state in which the comb teeth are inserted into the fastening structure of the cleaning broom according to the present invention, and a schematic cross-sectional view of a narrow mode state.

Hereinafter, with reference to the accompanying drawings, a cleaning broom according to the present invention will be described in more detail.

A cleaning broom according to an embodiment of the present invention includes a broom 10 and a comb portion 50 connected to the broom by a fastening structure.

The handle 10 is a rod formed long in one direction, and wood is used in the present invention. The length of the bag 10 may vary depending on the purpose. In the case of outdoor use such as a road, a yard, or a square, the bag is formed to be long, but in the case of an indoor use, it is formed relatively short to the height of a person's waist. However, in another embodiment of the present invention, the handle is not necessarily required. That is, in the present invention, since the connecting rod 42 to be described later can serve as a handle that the user can hold, when used in an indoor space, a handle may be replaced with the connecting rod 42 without the need for a separate handle.

The comb portion 50 is a part that sweeps away the cleaning object and has a structure in which a plurality of comb teeth 51 form a bundle. The comb teeth 51 have a length of several tens of cm and a thickness of several mm and are formed thin and long. The plurality of comb teeth 51 are coupled to the handle 10 by a fastening structure.

The existing combs 51 are made of cypress, plastic, bamboo, etc., and the present invention is characterized in that coconut palm branches are used.

There are three benefits to using coconut palm twigs.

First, coconut palm branches are environmentally friendly. You can make a cleaning broom easily and conveniently by using a plastic broom as the comb of the cleaning broom. However, plastic combs cause environmental pollution. Coconut palm branches are not only environmentally friendly, but also have superior elasticity than other materials, so that it is possible to manufacture a cleaning broom easily and conveniently by the unique fastening structure of the present invention.

Second, coconut trees have high abrasion resistance compared to other types of wood, making them suitable for use as comb teeth. In other words, in the case of cypress wood or bamboo, the strength and abrasion resistance are low, so the part in contact with the ground quickly wears out after a certain period of time, so the useful life is short. However, coconut wood has the advantage that it can be used for a sufficiently long time due to its high abrasion resistance.

Third, as described above, coconut trees have excellent elasticity compared to other trees. The comb teeth used for cleaning brooms should be able to maintain a certain level of elastic tension while bending well. That is, when the user presses the cleaning broom in contact with the ground, the comb teeth bend and the contact area with the ground expands, and the comb teeth press the ground by the elastic force in a pressurized state, so that the object to be treated can be wiped away. However, if the strength of the comb is too strong, it will not bend well and will rebound, making cleaning work more difficult and cleaning efficiency will decrease. Coconut wood material has optimal conditions for comb teeth in terms of abrasion resistance and elasticity.

And since coconut trees are widely cultivated in Southeast Asia, such as the Philippines and Indonesia, they have the advantage of being economically provided compared to plastics, bamboo, and cypress trees. The above advantages are the reasons for using the coconut wood material as the comb teeth in the present invention.

The conventional broom is completed by simply coupling the combs to the lower end of the handle, but in the present invention, an important feature is that the comb portion 50 can change its posture between a wide mode in which it is spread widely and a narrow mode in which it is narrowly gathered. have. In the present invention, a fastening structure for this is provided. The fastening structure includes the comb teeth 51 between the first posture in which the lower ends of the comb teeth 51 gather toward the center of the handle 10 and the second posture in which the lower ends of the comb teeth 51 are spread outward from the center of the handle 10 . ) to change their posture. Since the cleaning broom of the present invention can change its posture in this way, it is important that the comb teeth 51 are firmly fixed by the fastening structure compared to other types of cleaning brooms that are not.

While examining the configuration and operation for changing the posture, let's take a closer look at the configuration that can firmly fix the comb teeth 51 together.

For changing the posture between the first posture and the second posture, the fastening structure includes a support plate 21 , a housing 30 , a central rod 35 , a connecting member 40 , and a coupling body 47 . The fastening structure of the cleaning broom of the present invention may use a metal material that can be recycled, for example, stainless steel.

The support plate 21 is coupled to the lower end of the bag 10 . The cross-sectional area of the support plate 21 is formed to be larger than the cross-sectional area of the shaft 10 . In this embodiment, the support plate 21 is formed in the form of a disk or preferably in the form of a cone. And since the radius of the support plate 21 is larger than that of the shaft 10 , the support plate 21 is installed to protrude with respect to the shaft 10 . However, the shape of the support plate is not limited to a circular shape, and may be a polygonal shape including a square, an oval, or the like. And a hollow protrusion 27 is convexly formed on the rear surface of the support plate 21 . Here, the hollow type includes not only a tubular shape in which both the front and rear surfaces of the protrusion are perforated, but also a shape in which the front is blocked by the support plate 21 and a concave groove is formed inside. In this embodiment, the protrusion 27 is formed as a concave groove. The support plate 21 and the handle 10 are coupled to each other by fitting and fixing the handle 10 to the protrusion 27 . In this embodiment, a thread 28 is formed on the outer peripheral surface of the protrusion 27 .

The housing 30 is made of a hollow tubular shape so that both the upper and lower surfaces are opened. A male thread 31 is formed on the outer peripheral surface. At least one first protrusion 32 protruding inwardly is formed on the inner circumferential surface of the housing 30 . The first protrusion 32 is elongated along the inner circumferential surface of the housing 30 .

A central rod 35 is disposed inside the housing 30 . The central rod 35 is made of a hollow tubular shape, and has a diameter much smaller than that of the housing 30 . At least one second protrusion 38 protruding outward is formed on the outer circumferential surface of the central rod 35 . The second protrusion 38 is elongated along the outer circumferential surface of the central rod 35 . In particular, the second protrusion 38 may be formed to alternate with the first protrusion 32 . A cradle 36 is provided on the upper portion of the central rod 35 . The cradle 36 serves to stand up the central rod 35 during the manufacturing process, to support one end of the comb teeth 51 , and to engage the central rod 35 when the central rod 35 is fitted into the housing 30 .

In this embodiment, the central rod 35 is disposed coaxially with the housing 30 , and an annular space is formed between the outer peripheral surface of the central rod 35 and the inner peripheral surface of the housing 30 . Comb teeth 51 are inserted and fixed in this space. At this time, the first protrusion 32 and the second protrusion 38 press the comb teeth 51 formed in the annular space portion so that the inserted comb teeth do not separate from the annular space portion.

In terms of the manufacturing process, first, the central bar 35 is erected so that the cradle 36 touches the floor. A bundle of coconut palm twigs is used as the comb (51), and the central rod (35) is set in the center of one end of the bundle (51). At this time, the amount of comb teeth 51 bundle is prepared to be larger than the diameter of the holder 36 based on the position of the central rod 35 , that is, slightly larger than the diameter of the housing 30 . The housing 30 is inserted or inserted into the other end of the comb tooth 51 bundle. Since the amount of comb teeth 51 bundle is prepared somewhat larger than the diameter of the housing 30 based on the position where the central rod 35 is located, the housing 30 is easily inserted into the other end. When the inserted housing 30 is lowered to the floor, an annular space is formed between the housing 30 and the central rod 35 . In the process of lowering the housing 30 toward the central rod 35, an inserter capable of pressing with a force of several tons is used. At this time, if the first protrusion 32 and the second protrusion 38 are displaced, the comb teeth 51 are bent along the protrusions while the comb teeth 51 are pressed. When the first protrusion 32 and the second protrusion 38 are displaced, it becomes more difficult for the comb teeth 51 to escape from the annular space. In particular, in the cleaning broom of the present invention, the housing 30 is inserted into the central rod 35 with a bundle of comb teeth 51 interposed therebetween with the force of several tons with an inserter, but the coconut palm twig has good elasticity, so it is not sprayed in this process and is not sprayed with adhesive It is firmly fixed to the annular space part even without it. Since the adhesive is not used, there is no need to secure a space for inserting the adhesive by slightly lifting the housing 30, and there is no need to cure the adhesive for more than one day.

4 is a schematic exploded perspective view in which first and second protrusions are formed spirally on the housing and the central rod of the cleaning broom according to an embodiment of the present invention, and FIG. 5 is a schematic cross-sectional view of the fastening structure of the embodiment of FIG. 4 .

4 and 5 , as another embodiment, the first protrusion 32 protrudes inwardly on the inner circumferential surface of the housing 30 , and the second protrusion 38 helically protrudes from the outer circumferential surface of the central rod 35 . protrude

In this case, the process of manufacturing the cleaning broom of the present invention is as follows. First, the central bar 35 is erected so that the cradle 36 touches the floor. A bundle of coconut palm twigs is used as the comb (51), and the central rod (35) is set in the center of one end of the bundle (51). The housing 30 is inserted or inserted into the other end of the comb tooth 51 bundle. Then, the housing 30 is lowered toward the central rod 35 . At this time, by rotating the housing 30 and lowering it downward, the helical first protrusion 32 and the helical second protrusion 38 engage each other so as to be shifted from each other so that the comb teeth 51 inserted into the annular space are interposed between them. and screwed in. Since the helical first protrusion 32 and the helical second protrusion 38 are screwed with the comb inserted into the annular space portion therebetween, it is possible to assemble with less force, and the comb teeth ( 51) is fixed more firmly by spirally pressing. Above all, since the housing 30 is inserted in the form where the protrusion is inserted in the form of the protrusion riding and going around the screw thread, rather than the housing 30 is inserted while the protrusion presses the front of the comb tooth 51, the portion that is not pressed to the comb tooth 51 is As it remains, the comb teeth 51 are more firmly fixed in the annular space.

Referring to FIG. 6A , as another embodiment, the first protrusion 32 may be formed by rolling one end of the housing 30 inward. That is, one end of the housing 30 is rolled up like the rim of a paper cup. When the first protrusion 32 is formed by rolling one end of the housing 30 inward, it has elasticity, and it is possible to more efficiently press the comb teeth 51 . Above all, since the first protrusion 32 has elasticity, it is possible to adjust the number of comb teeth 51 inserted into the annular space to some extent. That is, manufacturing becomes easier.

Meanwhile, referring to FIG. 6B , the second wedge-shaped protrusion 39 may be additionally inserted at one end of the central rod 35 to fix the comb portion 50 . The wedge-shaped second protrusion 39 is inserted along the outer circumferential surface of the central rod 35 in the direction in which the comb teeth 51 are inserted into the annular space portion. Accordingly, the wedge-shaped second protrusion 39 additionally presses and fixes the comb teeth 51 . The wedge-shaped second protrusion 39 may be applied to other embodiments other than the embodiment shown in FIG. 6B .

A female thread 37 is formed on the lower inner peripheral surface of the central rod 35 . The female thread 37 is screwed with the thread 28 formed on the outer circumferential surface of the protrusion 27 of the support plate 21 so that the shaft 10 can be fixedly positioned. That is, the inner diameter of the lower end of the central bar 35 is larger than that of the shaft 10, and a female thread 37 is formed on the inner peripheral surface of the shaft 10, and the protrusion 27 of the support plate 21 is fitted at the lower end of the shaft 10. A thread 28 is formed on the outer circumferential surface of the protrusion 27 . By screwing the support plate 21 to the central bar 35 , the position of the shaft 10 coupled to the support plate 21 is fixed. Of course, by releasing the screw coupling, the shaft 10 is slidable with respect to the central rod 35 again. However, the coupling between the support plate 21 and the central rod 35 is not limited to the screw fastening method, and various configurations that can firmly couple or separate the support plate 21 and the central rod 35 from each other may be adopted. . In addition, as well as a structure in which a male thread is formed on the outer peripheral surface of the protrusion and a female thread is formed on the inner peripheral surface of the central rod, a male thread is formed on the outer peripheral surface of the central rod through structural changes, and an annular member is installed in the protrusion to form a female thread on the inner peripheral surface. may be formed.

Meanwhile, the connecting member 40 includes a cover 41 and a connecting rod 42 .

The cover 41 is detachably coupled to the upper portion of the housing 30 to close the open upper surface of the housing 30 . In this embodiment, a female thread 43 is formed on the inner circumferential surface of the cover 41 and is screwed with the male thread 31 of the outer circumferential surface of the housing 30 . In this embodiment, the cover 41 and the housing 30 are coupled in a screw-fastening manner, but in another embodiment, the two members may be detachably coupled to each other using a different mechanical configuration.

The connecting rod 42 is formed in a hollow tubular shape, the upper and lower surfaces are opened, and is formed to extend upward from the center of the upper surface of the cover 41 . Since the central rod 35 is coaxially disposed inside the housing 30 , the connecting rod 42 communicates with the central rod 35 and continues. A male thread 44 is formed on the central outer circumferential surface of the connecting rod 42 . A tightening portion 45 is formed on the upper portion of the male thread 44 . The tightening portion 45 forms the upper portion of the connecting rod 42, and is formed to be tapered in a form in which the outer diameter is gradually reduced. In addition, the slit 46 is cut in the tightening part 45 along the longitudinal direction (the longitudinal direction of the handle). A plurality of the slits 46 are formed along the circumferential direction of the tightening portion 45 .

In this embodiment, a coupling body 47 coupled to the connecting rod 42 is provided. The assembly 47 is for fixing the housing 30 , the central rod 35 , and the connecting member 40 to the bag 10 as a whole. That is, the housing 30 and the central rod 35 are coupled to each other, and the central rod 35 is fitted to the bag 10 . And the cover 41 of the connecting member 40 is coupled to the housing 30 , and the connecting rod 42 is fitted to the bag 10 . That is, the housing 30 , the central rod 35 , and the connecting member 40 are all coupled, and the combined entirety is inserted into the shaft 10 to be slidable. The coupling body 47 is formed in a hollow shape and is inserted into the shaft 10 and is screwed to the connection rod 42 to fix the connection rod 42 in close contact with the shaft 10 . In more detail, a female screw thread 48 is formed on the lower inner circumferential surface of the coupling body 47 to be screwed to and separated from the male screw thread 44 of the connecting rod 42 . And a pressing portion 49 extending upward from the female thread 48 is formed in the assembly 47 .

7 and 8, the tightening portion 45 of the connecting rod 42 is tapered and gradually decreases from the thickness indicated by the dotted line k to the thickness indicated by the dotted line p in the drawing. And the inner diameter of the pressing portion 49 of the assembly 47 may be formed between the thickness indicated by the dotted line k and the dotted line p, or slightly smaller than the thickness indicated by the dotted line p. And the part where the tightening part 45 starts is processed with a smooth curve.

Therefore, as shown in FIG. 7 , in a state in which the connecting rod 42 and the coupling body 47 are separated from each other, the coupling body 47 is moved downward and the coupling body 47 is screwed to the connecting rod 42 , as shown in FIG. 8 . In this process, the pressing portion 49 of the assembly 47 strongly presses the tightening portion 45 of the connecting rod 42 . That is, since the inner diameter of the pressing portion 49 of the coupling body 47 is smaller than the outer diameter of the tightening portion 45 of the connecting rod 42, the pressing portion 49 in the process of screwing the connecting rod 42 and the coupling body 47 to each other. ) is to be force-fitted to the tightening part (45). Accordingly, the connecting rod 42 is pressed by the coupling body 47 to completely adhere to the outer circumferential surface of the bag 10 , so that the connecting rod 42 is firmly coupled to the bag 10 . In particular, the slit 46 formed in the tightening portion 45 of the connecting rod 42 is closed by the pressure of the assembly, and the connecting rod can be more firmly attached to the bag. Conversely, when the coupling between the connecting rod 42 and the coupling body 47 is released, the pressing force of the pressing part 49 is released, so that the adhesion between the connecting rod 42 and the handle 10 is reduced. ) can be moved relative again.

In the broom 100 according to the present invention having the above configuration, the comb teeth 51 can change the posture between the first posture and the second posture.

That is, when the shaft 10 is lowered to about the central portion of the comb teeth 51 , the interference between the support plate 21 and the comb teeth 51 is reduced. It is arranged in parallel to change the posture to the first posture, that is, the narrow mode. In the narrow mode, the comb teeth 51 spread to a length of about d1 in FIG. 3 (assuming a circle, the diameter becomes d1).

In this state, after the connecting rod 42 and the coupling body 47 are separated, as shown in FIG. 9 , when the handle 10 is moved to the upper end of the comb teeth 51 , the support plate 21 removes the comb teeth 51 . While pushing outward, the comb teeth 51 intersect while forming a considerable angle with respect to the arrangement direction of the shaft 10 . That is, as the comb teeth 51 are widened, the second posture is changed to a wide mode. The comb teeth 51 are spread to a length of d2 in the drawing (assuming a circle has a diameter of d2). Of course, the length of d2 in the wide mode is much longer than that of d1 in the narrow mode.

After changing to the wide mode, when the connecting rod 42 and the coupling body 47 are re-coupled, the connecting rod 42 is firmly coupled to the handle 10, so that a broom can be used. Also, in the wide mode, since the comb teeth 51 pushed outward by the support plate 21 are to be elastically restored to their original positions, the comb teeth 51 press the support plate 21 . Therefore, in the wide mode, the shaft 10 and the conversion unit need to be more firmly coupled. Accordingly, in the present invention, the female thread 37 of the central rod 35 and the male thread 28 of the protrusion 27 of the support plate 21 are mutually screwed together in a wide mode to enable more robust coupling.

However, in the wide mode, the support plate 21 may be completely pulled up and coupled with the central rod 35, but may be raised only to a certain extent. In this case, the central bar 35 and the support plate 21 are not coupled to each other. That is, the user can adjust the angle at which the comb teeth 51 are spread by changing the position of the support plate 21 .

As described above, the broom 100 according to the present invention can change its posture to a narrow mode and a wide mode by disposing the comb teeth 51 in parallel with the handle 10 or intersecting while forming a wide angle. .

Use the broom in narrow mode when sweeping narrow corners or brushing with a lot of force, and change your posture to wide mode when you want to sweep a large area at once without too much force, such as when using fallen leaves. use it That is, it is possible to efficiently clean by changing the postures of the comb teeth between the narrow mode and the wide mode according to the state of the object to be cleaned or the characteristics of the area.

In particular, the present invention is characterized in that it adopts a very simple configuration in order to change the posture of the comb teeth. In the case of daily necessities such as brooms, no matter how good the function, it is not practical if excessive production cost is invested to realize the function. In the present invention, there is an advantage that the posture of the broom can be changed with a very simple configuration, and the manufacturing cost can be remarkably reduced.

In the case of a conventional broom that can be changed into a wide mode and a narrow mode, the configuration is too complicated, making economical manufacturing impossible, and durability is also reduced due to the complexity of the structure. That is, the complexity of the structure increases the number of parts as well as the assembly cost, and the coupling structure between the parts is also increased, which is undesirable in terms of cost and durability. The present invention will be said to have great practical significance in that it satisfies all functions, economy, and durability through a simple configuration.

Moreover, by adopting a very simple structure in changing the posture of the comb teeth, it is economical as well as excellent in durability, so that it is very practical as a daily necessities.

The protection scope of the invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the protection scope of the present invention cannot be limited due to obvious changes or substitutions in the technical field to which the present invention pertains.

Claims (8)

A tubular housing having an upper end and an open lower end;
a central rod having a hollow shape and disposed in the center of the housing to form a ring-shaped space between the inner circumferential surface of the housing;
a plurality of comb teeth inserted into the annular space inside the housing and fixed by an adhesive to sweep the object to be cleaned; and
a connecting member detachably coupled to the upper portion of the housing and having a hollow connecting rod connected to the central rod in communication with the central rod;
A first protrusion protruding inwardly is formed on the inner circumferential surface of the housing, and a second protrusion protruding outwardly is formed on the outer circumferential surface of the central rod to press and fix the comb teeth inserted into the annular space. A cleaning broom with a fastening structure that is easy to assemble.
According to claim 1,
The cleaning broom having a fastening structure that is easy to assemble, characterized in that the first protrusion and the second protrusion are displaced from each other so that the comb teeth inserted into the annular space are bent.
According to claim 1,
The first protrusion protrudes helically inward from the inner circumferential surface of the housing, and the second protrusion helically protrudes from the outer circumferential surface of the central rod.
4. The method of claim 3,
The cleaning broom having a fastening structure that is easy to assemble, characterized in that the first protrusion and the second protrusion are engaged with each other so as to be displaced from each other and are screwed with the comb teeth inserted into the annular space portion therebetween.
According to claim 1,
The first protrusion is formed by rolling one end of the housing inward, thereby elastically pressing the comb teeth when the comb teeth are inserted.
According to claim 1,
It further includes a wedge-shaped second protrusion inserted along the outer circumferential surface of the central rod in the direction in which the comb teeth are inserted,
The cleaning broom having an easy-to-assemble fastening structure, characterized in that the wedge-shaped second protrusion additionally pressurizes and fixes the comb.
According to claim 1,
The housing, the central rod and the connecting member are a cleaning broom having a fastening structure that is easy to assemble, characterized in that it is made of a recyclable metal material.
According to claim 1,
The comb is a cleaning broom, characterized in that the coconut palm branches.

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