WO2009064104A2

WO2009064104A2 - Door stopper

Info

Publication number: WO2009064104A2
Application number: PCT/KR2008/006648
Authority: WO
Inventors: Ji-Ill Jung
Original assignee: Ji-Ill Jung
Priority date: 2007-11-16
Filing date: 2008-11-12
Publication date: 2009-05-22
Also published as: WO2009064104A3; KR20090050557A

Abstract

The present invention relates to a door stopper. The major construction of the same comprises an attaching plate engaged to an outer lower side of the door, a body formed of a rod of which one end is rotatably inserted into a pivot bracket of the attaching plate, a rotation member which rotates from a lower side to an upper side pending on a rotation degree of the body when the body rotates from the upper side to the lower side, a connection band in which when one between the body and the rotation member rotates, the other one between the body and the rotation member can rotate along with the one, and a pedal which is attached to one side of the rotation member for rotating the rotation member in a state that the rotation member is inserted into the rotation part formed at a lower side of the attaching plate. With the above constructions, the body can be lifted up by stepping on the pedal with the help of a simple structure that the rotation member and the upper side of the body are connected through the connection band, so it should be appreciated that it is possible to decrease the number of parts needed for the operation of the body, and the unit cost can be saved, and the quality can be reliably enhanced.

Description

DOOR STOPPER

Technical Field

The present invention relates to a door stopper, and in particular to a door stopper in which a pedal is engaged at a lower side of a rod shaped body, which supports a door, and a tensile member like a connection band is engaged between the body and the pedal, so a door can be easily supported or released with the helps of a simple returning structure formed of a pedal and a connection band and a simple returning operation implemented based on a cooperation with the pedal and the connection band.

Background Art

Generally, a door stopper is a kind of an apparatus which is engaged at a lower side of an inner wall surface of a door for thereby stably supporting the door with respect to a support surface, so the door can not be randomly closed. As shown in Figure 1 , the door stopper 101 comprises an attaching plate 103 which is engaged at a lower end of an inner side surface of the door 110, and a rod shaped body 105 which is engaged to the attaching plate 103 movably up and down by means of a pivot pin 107.

Here, the attaching plate 103 is formed of a flat plate, in which a pair of pivot brackets 109 engaged with the pivot pin 107 are protruded from its center. The attaching plate 103 is fixed on a wall surface of the door 110 by means of a screw or something which is engaged to four corners, respectively. The body 105 is engaged so that its upper end 126 can be operable between the pivot brackets 109, and a pad 111 friction-contacting with the ground surface is attached to its lower side. So, when the door 110 is closed, namely, not used, the body 105 of the door stopper 101 keeps the most lifted state in an upward direction, so the upper end 126 is tightly and fixedly inserted between the pivot brackets 109. When the door 101 is needed to keep its open state, as shown in Figure 1 , the body 105 is lowered and pressurizes against the ground surface with the help of the friction pad 111 for thereby stably supporting the door 101.

As shown in Figure 1 , in the conventional door stopper 101 , when it is needed to lift up from the fixed position of the door, which keeps pressurized against the ground surface, to the door releasing position, a hand, a shoe or the top of a shoe is used so as to lift up an inner side of the body 105, which leads to an uneasy use and non-sanitation or dirt on the shoes used. When it is not used, namely, when it is in a door releasing position, since the upper end 126 of the body 105, which keeps the most upwardly lifted state, is tightly inserted between the pivot brackets 109, for thereby preventing the body 105 from returning down to the ground surface. When a holding force of the pivot brackets 109, in which the upper end 126 of the body keeps a tight insertion state, is weakened, the door 105 may be easily returned down by means of an external force when the door is moved or someone kicks the door, so it is impossible to keep a stable opening and closing operation of the door 110.

So as to improve the problems found in the conventional door stopper, a new door stopper in which the body is lifted by means of a certain elastic member such as a tensile spring, a compression spring or a torsion spring is disclosed. However, it is disadvantageous that the above conventional door stopper needs a lot of parts for converting the elastic force of various springs into a rotational force of the body, which leads to a high unit cost of parts owing the increasing number of parts, and a higher possibility of errors due to an abrasion, corrosion or damage of the parts. So, the quality of the product may be poor. When an unexpected external force is applied to the door stopper, the body may be easily moved down for thereby interfering with a normal opening and closing operation of the door, which leads to many inconveniences in use. In order to prevent the above problems, a lot of parts is further needed, so the unit cost of the parts may increase.

DISCLOSURE QF THE INVENTION Technical Problem

Accordingly, the present invention is disclosed to overcome the problems found in the conventional door stopper.

It is an object of the present invention to provide a door stopper in which a rotation member and a pedal are engaged at a lower side of a pivot engaging part of a door stopper body, and a connection band is attached between an upper side of the body and a rotation member. The rotation structure of a door stopper for lifting up the body when not in use is simplified, so the number of parts needed for manufacturing the door stopper is significantly decreased, and a damage and malfunction due to an abrasion or corrosion of parts can be decreased. The products do not cost much by decreasing the manufacturing processes and cost, and a product quality can be enhanced. It is possible to stably support and fix the body, which is lifted up to the door releasing position, by using a simple structure engagement member with the help of an elastic member such as a plate spring.

Technical Solution

To achieve the above objects, there is provided a door stopper which comprises an attaching plate which is engaged at an outer lower side of a door, with a pivot bracket being protruded from a front surface of the attaching plate, and with a rotation part being disposed at a lower side of the pivot bracket; a body which is formed of a rod having one end being rotatably inserted into the pivot bracket of the attaching plate, for thereby allowing the door to stop in its open state when the one end of the rod contacts with the ground surface as the rod rotates downward with respect to 5 the pivot bracket; a rotation member which is rotatably engaged in the rotation part formed at a lower side of the attaching plate, and maintains a downwardly rotated state in a state that the body is upwardly lifted, and upwardly rotates from the lower side to the upper side depending on the rotation degree of the body when the body rotates from the upper side to the i o lower side; a connection band which is connected between the body and the rotation member, and in which when one between the body and the rotation member rotates, the other one between the body and the rotation member can rotate along with the one; and a pedal which is attached to one side of the rotation member for rotating the rotation member in a state that the

15 rotation member is inserted into the rotation part formed at a lower side of the attaching plate.

Advantageous Effect

20 In the door stopper according to the present invention, when it is needed to fix the door by lowering the body from an upper side to a lower side, a friction pad is stepped on like in a conventional door stopper as a body is connected to a rotation member with the help of a connection band. When it is needed to move the door by lifting up the body in a state that the

25 body contacts with the ground surface, the connection band is pulled down by a simple operation that the pedal is stepped on for thereby easily lifting up the body.

So, the lifting up operation of the body can be easily implemented by adding a simple structure, namely, a connection band. So, the number of

30 parts needed in relation with a lifting up operation of the body can be significantly decreased, and the costs needed for an assembling, manufacture and purchase of the parts can be decreased, which leads to lowering the manufacturing unit cost of the door stopper.

In particular, a spring part such as a tensile spring, a compression 5 spring, and a torsion spring is not used in relation with the operation of the stopper in the present invention. So, it is possible to significantly decrease the errors or operational failures of the apparatus due to the aging, corrosion or damages of the above springs and related parts. It should be appreciated that the qualities of the products in relation with the durability and reliability of i o the parts can be significantly enhanced.

An engaging protrusion protruded from the body or a locking protrusion protruded from a pivot bracket or an attaching plate, which corresponds to the engaging protrusion, is engaged in a snap type with the help of an elastic force of the elastic member. So, it is possible to more

15 stably and effectively support and fix the body which is lifted up at a door releasing position, so the use of the door stopper can be a lot enhanced.

Brief Description of the Drawings

20 The present invention will become better understood with reference to the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein;

Figure 1 is a perspective view illustrating a conventional door stopper;

25 Figure 2 is a perspective view illustrating a state that a door stopper is positioned at a door fixing position according to the present invention;

Figure 3 is a perspective view illustrating a state that a door stopper is positioned at a door releasing position according to the present invention;

Figure 4 is a disassembled perspective view of Figure 3; Figure 5 is a view for explaining an operation state of a door stopper before an engaging member is snap-engaged according to the present invention; and

Figure 6 is a view illustrating a state that an engaging member is snap-engaged in the state of Figure 5 and is lifted up to a door releasing position.

Best Mode for Carrying Out the Invention

The door stopper according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in Figures 2 and 3, the door stopper 1 is a kind of an apparatus engaged at the lower sides of the inner and outer side surfaces of a door 10 and maintains an open state of the door 10. The door stopper 1 comprises an attaching plate 3, a body 5, a rotation member 20, a connection band 17, and a pedal 15.

The attaching plate 3 is formed in a flat substrate shape and helps the door stopper 1 be attached on an outer lower side of the door 10. Engaging holes 31 are formed at four corners of the attaching plate 3, so the attaching plate 3 is engaged by means of an engaging member such as a screw or the like. A pair of pivot brackets 9 are protruded from a front center of the same for engaging the body 5 in a pivot and rotation method with the help of a pivot pin 7. As shown in Figure 4, a rotation part 13 is formed at a lower side of the pivot bracket 9 and consists of a pair of support rings. The rotation part 13 is open in a backward direction of the attaching plate 3 so that a rotary shaft 22 of the rotation member 20 can be inserted from a back side of the attaching plate 3.

The body 5, which rotates upward and downward in the front side of the attaching plate 3 through the pivot brackets 9, is formed in a cylindrical or angular shaped support rod. The upper end 26 of the same is rotatably inserted into the pivot brackets 9 by means of the pivot pin 7, and as shown in Figure 2, the body 5 rotates downward with respect to the pivot brackets 9. When the lower side of the same contacts with the ground surface, the door 10 maintains an opened state. Here, a friction pad 11 made of an elastic material such as a rubber or the like is attached at an end of the body 5 for a friction contact, not slipping on the ground surface.

As shown in Figures 2 and 4, the rotation member 20 is rotatably engaged in the rotation part 13 formed at a lower side of the attaching plate 3. In a state that the body 5 is lifted up as shown in Figure 3, it maintains a downwardly rotated state. As shown in Figure 2, when the body 5 rotates from the upper side to the lower side, it rotates from the lower side to the upper side depending on a rotation degree of the body 5. As shown therein, the rotation member 20 includes a rotary shaft 22 rotatably inserted into the rotation part 13 formed at a lower side of the attaching plate 3, and a hand fan shaped rotation piece 21 which is integral with the rotary shaft 22.

The rotation piece 21 is formed in a hand fan shape having a certain thickness enough to be engaged in the rotation part 13, namely, between a pair of support rings. A connection band 17 is wound on the outer surface of the same as shown in Figure 6. At this time, it is preferred that the rotation piece 21 has the maximum rotation radius enough not to make an interference with the body 5 as shown in Figure 2 since the connection band 17 can be more efficiently pulled as the rotation radius is larger.

Here, the connection band 17 is connected between the body 5 and the rotation member 20. When either the body 5 or the rotation member 20 rotates, the remaining one is rotated together. In more details, when the body 5 rotates with respect to the pivot pin 7, the rotation member 20 rotates together in cooperation with the movement of the body 5. When the rotation member 20 rotates, the body 5 rotates together in cooperation with the rotation member 20. One of the connection band 17 is attached to the rotation piece 21 , and the other end of the same is attached to the upper end 26 of the body 5 in various shapes. As shown in Figures 2 through 6, slot shaped tapered holes 28-1 and 28-2 pass through the radius surface 23 of the back side of the rotation piece 21 and the front side of the upper end 26 of the body, respectively, and the circular pipe shaped connection rings 18-1 and 18-2 formed by rolling the both ends of the same are inserted into the tapered holes 28-1 and 28-2, respectively. The tapered fixing pins 24-1 and 24-2 are inserted into the connection rings 18-1 and 18-2 inserted in the tapered holes 28-1 and 28-2, respectively, so that it is possible to wind the connection band in a S-shaped from the upper end 26 of the body to the rotation piece 21. The above descriptions are not limited thereto. The connection band can be attached to the rotation piece 21 and the body 5 in various methods. The term of "Connection band" used in the present invention comprehensively represents a tensional member which connects the rotation piece 21 and the body 5 for a cooperation of the same. As shown in Figure 4, the pedal 15 is attached to one side of the rotation member 20. As shown in Figure 2, when the body 5 keeps contacting with the ground surface, the pedal 15 is used to supply an external force so as to allow the body 6 to lift upward. When an external force is applied to the pedal 15, the rotation member 20 rotates downward with the rotation member 20 being inserted into the rotation part 13 formed at a lower side of the attaching plate 3, and as shown in Figure 3, the body 5 rotates upward and is lifted up.

Here, the pedal 15 may be formed in various shapes. As an example of the same, as shown in Figure 4, the pedal 15 may be protruded from one side of the rotary shaft 22 or from the both ends of the rotary shaft 22 in the radius direction.

In the present invention, an engaging unit 40 is further provided.

The engaging unit 40 is provided for fixing the body 7, which was lifted up while rotating with respect to the pivot pin 7, between the pivot brackets 9 at a vertical position closer to the attaching plate 3. The engaging unit 40 includes an engaging protrusion unit 41 formed in the body 7, and a locking protrusion unit 43 formed in the side of the attaching plate 3. When an external force is not applied to the body 5 in a door release position in which the end 26 of the body 5 is moved upwardly, the body 5 is prevented from being moved to the lower side. Here, the external force represents a force applied so as to move down the body 5 as the user steps with feet or pulls downward with hands, and represents an unexpected force generating as the user kicks the door 1 or swings the door with hands.

Here, the engaging protrusion unit 41 may be formed in various shapes protruded from the front sides of the body 5 or the upper end 26 of the body without making an interference with the connection band 17. As adapted in this embodiment of the present invention, the engaging protrusion unit 41 includes a pair of fixing rings 45 fixed at the both ends of the pivot pin 7 on the both side surfaces of the upper end 26 of the body, and a pair of engaging protrusions 47 which are protruded from the outer front sides of the fixing rings 45, respectively.

When the body 5 of the door fixing position starts lifting up, the engaging protrusion 47 slightly pressurizes the locking protrusion 53, and when the body 5 is fully lifted up, the engaging protrusion 47 is engaged to the locking protrusion 53 in the snap type. As shown in Figure 2, the engaging protrusion 47 is shaped like a bird's beak which is upwardly concaved for thereby forming an engaging shoulder at its front end.

As shown in Figure 4, the locking protrusion unit 43 elastically moves forward or backward in a horizontal direction and is engaged with the engaging protrusion unit 41 along with the rotation of the engaging protrusion unit 41 when the engaging protrusion unit 41 rotates in a circumferential direction along the body 5. The locking protrusion unit 43 is snap-engaged with the engaging protrusion unit 41 between the pivot brackets 9 with the help of the elastic force of the elastic member like a spring. Its construction is not limited thereto. A certain construction, which is able to meet the above construction requirements, can be adapted. The locking protrusion unit 43 includes a plate spring 49 of which both upper and lower ends are fixed to the attaching plate 3 between the pivot brackets 9, and a locking protrusion block 51 which contacts with a front surface of the plate spring 49, with a locking protrusion 53 being protruded from a front end extended forwardly, for accommodating an elastic force of the plate spring 49.

As shown in Figures 4 through 6, the locking protrusion block 51 comprises an elastic contact part 55 which contacts with the spring 49 with an area enough for accommodating the elastic force of the plate spring 49, a pair of reinforcing parts 57 which are forwardly protruded from the left and right sides of the elastic contact part 55, and a pair of locking protrusions 53 which are protruded from the front sides of the reinforcing parts 57 and are engaged with the engaging protrusion unit 41 with the help of the plate spring 49, respectively. The locking protrusion block 51 is formed in a channel shape when viewing its cross section. As shown in Figures 4 through 6, the locking protrusion 53 is protruded from the front side of the locking protrusion block 51 , namely, from the front upper side of the reinforcing part 57. The locking protrusion 53 has an engaging shoulder at its lower side for a snap type engagement with the engaging protrusion 47 with the help of a pressurizing force of the plate spring 49. In this embodiment of the present invention, the elastic member of the engaging unit 40, namely, the plate spring 49, is installed in the locking protrusion unit 43. However, on the contrary, it may be installed in the engaging protrusion unit 41 for thereby elastically forming the engaging protrusion 47. The engaging protrusion unit 41 and the locking protrusion unit 43 may be snap-engaged by making the locking protrusion 53 using a rigid material having no elastic force.

The operation of the door stopper according to the present invention will be described as follows.

As shown in Figures 3 and 6, in the door stopper 1 attached to the door 10 of the present invention, in the door release position in which the body 5 is vertically lifted upward with respect to the ground surface, the door 10 can freely move without any interference by the door stopper 1. In this state, since the engaging protrusion 47 and the locking protrusion 53 are engaged in a snap method for thereby maintaining the body 5, which is lifted up, and the pedal 15 and the rotation member 20, which are lowered down. As shown in Figure 2, when the user wants the door 10 at a certain position with the being opened, when the user steps on the friction pad 11 of the body 5 as shown in Figure 3, the body 5 rotates downward with respect to the pivot pin 7. When the body 5 rotates downward, since the rotation piece 21 of the rotation member 20 is connected with the body 5 by means of the connection band 17, the rotation piece 21 rotates upward in cooperation with the movement of the body 5, and as shown in Figure 5, the engaging protrusion 47 pushes the locking protrusion 47 and presses the plate spring 49 through the locking protrusion block 51 while transforming the plate spring, so that the snap engagement of the engaging unit 40 is released. When the body 5 rotates downward and contacts with the ground surface as shown in Figure 2, the door 10 is fixed at the opened position. At this time, the rotation member 20 keeps rotated in maximum in the upward direction along with the pedal 15, and the engaging protrusion 47 is positioned in a forward direction. In order to lift up the door stopper 1 , while not contacting with the ground surface as shown in Figure 3, so as to open the door 10, when the user steps on the pedal 15 downward in the state of Figure 2, the pedal 15 is downwardly stepped on. When the pedal 15 is downwardly stepped on, the rotary shaft 22 engaged to the pedal 15 rotates downward by the force generated when the pedal 15 is downwardly stepped on in a state that the rotary 22 is inserted into the rotation part 13. As the rotary shaft 22 rotates, the rotation piece 21 rotates as well in a downward direction.

So, when the rotation piece 21 rotates downward, the rotation piece 21 and the body 5 are connected with each other by means of the connection band 17. Since the connection band 17 is pulled downwardly, the connection band 17 connected with the upper end 26 of the body 5 as shown in Figure 6 is pulled downwardly, so that as shown in Figure 5 the body 5 is lifted upward, and when the force is continuously applied to the connection band 17, the body 5 is lifted upward in maximum in the door release position as shown in Figure 6. At this time, the engaging protrusion 47, which rotates with respect to the pivot pin 7 along with the body 5, is snap-engaged with the locking protrusion 53 while overcoming the elastic force of the plate spring 49, so that the body 5 is stably maintained in the door release position. The user can freely move the door 10.

Industrial Applicability

In the door stopper according to the present invention, the body, which supports the door, is connected with the rotation member through the connection band. When the door is fixed by moving the body from the upper side to the down side, it is possible to lower the body in a downward direction by stepping on the friction pad in the same manner as the conventional method for lowering the door stopper. In a state that the body contacts with the ground surface, when it is needed to move the door by lifting up the body, the connection band is downwardly pulled with the help of a simple operation that the pedal is stepped on, so that the body can be easily lifted up.

As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

WHAT IS CLAIMED IS:

1. A door stopper, comprising: an attaching plate 3 which is engaged at an outer lower side of a door 10, with a pivot bracket 9 being protruded from a front surface of the attaching plate 3, and with a rotation part 13 being disposed at a lower side of the pivot bracket 9; a body 5 which is formed of a rod having one end 26 being rotatably inserted into the pivot bracket 9 of the attaching plate 3, for thereby allowing the door 10 to stop in its open state when the one end of the rod contacts with the ground surface as the rod rotates downward with respect to the pivot bracket 9; a rotation member 20 which is rotatably engaged in the rotation part 13 formed at a lower side of the attaching plate 3, and maintains a downwardly rotated state in a state that the body 5 is upwardly lifted, and upwardly rotates from the lower side to the upper side depending on the rotation degree of the body 5 when the body 5 rotates from the upper side to the lower side; a connection band 17 which is connected between the body 5 and the rotation member 20, and in which when one between the body 5 and the rotation member 20 rotates, the other one between the body 5 and the rotation member 20 can rotate along with the one; and a pedal 15 which is attached to one side of the rotation member 20 for rotating the rotation member 20 in a state that the rotation member 20 is inserted into the rotation part 13 formed at a lower side of the attaching plate 3.

2. The stopper of claim 1 , further comprising an engaging means 40 for preventing the body 5 from moving in a downward direction when an external force is not applied to the body 5 in a door release position in which one end 26 of the body 5 is upwardly moved.

3. The stopper of claim 1 , wherein said rotation member 20 includes a rotary shaft 22 rotatably inserted into the rotation part 13 formed at a lower side of the attaching plate 3, and a hand fan-shaped rotation piece 21 which is integral with the rotary shaft 22, and said rotation part 13 is formed of a pair of support rings which are open in a backside of the attaching plate 3, so that the rotary shaft 22 can be inserted from the backside of the attaching plate 3.

4. The stopper of claim 1 , wherein said connection band 7 includes one end fixed at the rear radius surface 23 of the rotation piece 21 , and the other end is fixed on an outer surface 27 of the one end 26 of the body 5.

5. The stopper of claim 2, wherein said engaging means 40 includes an engaging protrusion unit 41 which is formed at one end 26 of the body 5 while being protruded from a front side of the outer surface 27 of one end 26 of the body 5, and a locking protrusion unit 43 which moves forward and backward in a horizontal direction along with the rotation of the engaging protrusion unit 41 when the engaging protrusion unit 41 rotates in a circumferential direction along the body 5.

6. The stopper of claim 5, wherein said locking protrusion unit 43 includes a plate spring 49 of which both ends are fixed between the pivot brackets 9, and a locking protrusion block 51 which is engaged to the plate spring 49 for accommodating an elastic force of the plate spring 49 and moves forward and backward in a horizontal direction with the help of a rotation of the engaging protrusion unit 41 and elastically supports the plate spring 49, and said locking protrusion block 51 includes an elastic contact part 55 which contacts with the plate spring 49 for accommodating an elastic force of the plate spring 49, and a pair of reinforcing parts 57 which are protruded from the left and right sides of the elastic contact part 55 in the direction of the engaging protrusion unit 41 , and a pair of locking protrusions 53 which are protruded from the front ends of the reinforcing parts 57 and are hook-engaged with the engaging protrusion unit 41 with the help of an elastic force of the plate spring 49.