JP6277536B1 - Door stopper - Google Patents

Abstract

A door stopper that is easy to install and excellent in hygiene is provided. A door stopper 1 is installed on a floor surface to lock a door. The door stopper 1 includes a main body portion 10 including a curved surface 11 that curves in a convex shape, and a cylindrical portion 21 that protrudes from the main body portion 10 in a protruding direction J opposite to the direction in which the curved surface 11 protrudes. The curved surface 11 can contact both the floor surface and the door surface of the door, and includes a first contact portion 13 that contacts the horizontal surface in a reference state in which the protruding direction J coincides with the vertical direction. Further, the door stopper 1 returns to the reference state from the inclined state where the protruding direction J is inclined with respect to the vertical direction J on the center line Q1 extending in the protruding direction J through the first contact portion 13. It has a center of gravity M at a position where it acts as described above. [Selection] Figure 3

Description

  The present invention relates to a door stopper, and more particularly to a door stopper capable of locking a door at an arbitrary position.

  Conventionally, for example, a door stopper described in Patent Document 1 is known as such a door stopper. As shown in FIG. 1, such a door stopper 900 includes a spherical member 910 and a housing body 920 that houses the spherical member 910. The spherical member 910 is made of a material that exhibits a large frictional force against the floor surface or the door surface. Therefore, when the spherical member 910 contacts both the floor surface and the door surface, the door is pressed and locked by the repulsive force generated by this frictional force. On the other hand, the container 920 is made of a material that exhibits a smaller frictional force than the spherical member 910. Further, an opening 921 having a diameter smaller than the diameter of the spherical member 910 is formed on each surface of the container 920 so that a part of the spherical member 910 can be exposed.

  According to such a configuration, when the door stopper 900 is pushed by the door, the container 920 moves with respect to the floor surface, whereas the spherical member 910 hardly moves with respect to the floor surface. Therefore, even when the door does not contact the spherical member 910 at the first stage when the door contacts the door stopper 900 (that is, when the container 920 is the first to contact), the container 920 is pushed by the door to form a spherical shape. As a result of retreating with respect to the member 910, finally, a part of the spherical member 910 is exposed from one of the openings 921 and comes into contact with the door surface. As a result, the door is locked in place. As described above, according to the door stopper 900, the door can be locked regardless of the direction of the door stopper 900 with respect to the door. Therefore, the door stopper 900 is bothered to be installed at an appropriate position. This saves labor and realizes excellent installation ease.

  However, in such a door stopper 900, when installing or removing the door stopper 900, it is necessary to directly grip the container 920 to which dust or dirt on the floor surface or the door surface is attached. is there.

JP 2017-061812 A

  The present invention has been made in view of such problems of the prior art, and an object thereof is to provide a door stopper that is easy to install and excellent in terms of hygiene.

  According to the first aspect of the present invention, a door stopper that is easy to install and excellent in hygiene is provided. This door stopper is installed on the floor in order to lock the door. The door stopper includes a main body portion including a curved surface that curves in a convex shape, and a first additional member that protrudes from the main body portion in a protruding direction opposite to the direction in which the curved surface protrudes. The curved surface includes a first contact portion that can contact both the floor surface and the door surface of the door, and that contacts the horizontal surface in a reference state in which the protruding direction coincides with the vertical direction. It is out. The door stopper is on a first straight line extending in the protruding direction through the first contact portion, and the protruding direction is changed from the inclined state inclined with respect to the vertical direction to the reference state. It has a center of gravity at a position that acts to return.

  Thus, the door stopper according to the present invention has a center of gravity at a position on the first straight line extending in the protruding direction through the first contact portion and acting so as to return from the inclined state to the reference state. Therefore, even when the door stopper is tilted, it operates like a so-called rising spill and returns to the reference state. In other words, according to this door stopper, even if the user throws it on the floor without bending his body, it automatically enters the reference state, so that the user can properly install the door stopper. There is no need to bend the body and it is easy to install.

  In addition, the door stopper includes an additional member that protrudes on the opposite side to the direction in which the curved surface protrudes, so that the user holds the additional member when installing or removing the door stopper, Since it is not necessary to touch the main body part to which dust or dirt adheres to the floor surface or door surface, it is excellent in terms of hygiene.

  Here, the curved surface may further include a second contact portion that contacts the horizontal surface in the inclined state. In this case, when the second straight line extending in the vertical direction through the second contact portion in the inclined state is defined, the center of gravity is the intersection of the first straight line and the second straight line. It is preferable that it is located on a line segment of the first straight line connecting the first contact portion. Further, it is more preferable that the curved surface has a shape that is axially symmetric with respect to an axis extending in the vertical direction when in the reference state. This makes it easy to configure the door stopper to automatically return to the reference state. And in order to comprise a door stopper in this way, it is good also considering the said curved surface as a part of spherical surface.

  By the way, the first additional member may be formed so as to project further outward than the maximum bulge portion of the main body portion and to exhibit a smaller frictional force against the door surface than the curved surface. . Such a configuration prevents the floor surface from repeatedly contacting only a specific portion of the curved surface, and wears the portion or prevents dust or dirt from adhering to the portion. Is maintained for a long time.

  The main body may include a base having the curved surface and a substrate connected to both the base and the first additional member. In this case, the substrate is formed so as to protrude further outward than the maximum bulge portion of the base portion and to exhibit a smaller frictional force against the door surface than the curved surface. Such a configuration prevents the floor surface from repeatedly contacting only a specific portion of the curved surface, and wears the portion or prevents dust or dirt from adhering to the portion. Is maintained for a long time.

  Note that the substrate and the first additional member may be integrally formed. Thereby, the manufacturing cost of a door stopper is reduced.

  The door stopper may further include a pair of protrusions extending from the first additional member to opposite sides along the direction perpendicular to the protrusion direction. With such a configuration, the ease of installation of the door stopper is further increased.

  The door stopper according to the present invention has a center of gravity at a position on the first straight line extending in the protruding direction through the first contact portion and acting so as to return from the inclined state to the reference state. As a result, the door stopper in the inclined state automatically returns to the reference state, so that it is easy to install. Moreover, since the additional member which protrudes on the opposite side to the direction in which the curved surface protrudes is provided, the additional member can be gripped and the door stopper can be installed or removed. Thus, according to the present invention, it is possible to provide a door stopper that is easy to install and excellent in terms of hygiene.

FIG. 1 is a perspective view showing a conventional door stopper. FIG. 2 is a perspective view showing the door stopper in the first embodiment of the present invention. 3 is a longitudinal sectional view of the door stopper shown in FIG. 2, and is a view showing a reference state of the door stopper of FIG. 4 is a longitudinal sectional view of the door stopper shown in FIG. 2, and is a view showing an inclined state of the door stopper of FIG. FIG. 5 is a schematic diagram showing the operation of the door stopper of FIG. FIG. 6 is a perspective view showing a door stopper according to the second embodiment of the present invention. FIG. 7 is a schematic diagram showing the operation of the door stopper of FIG. FIG. 8 is a schematic view showing the operation of the door stopper of FIG. FIG. 9 is a perspective view showing a door stopper according to the third embodiment of the present invention. FIG. 10 is a longitudinal sectional view of the door stopper shown in FIG.

  Hereinafter, embodiments of the door stopper according to the present invention will be described in detail with reference to FIGS. 2 to 10. 2 to 10, the same or corresponding components are denoted by the same reference numerals, and redundant description is omitted. In FIGS. 2 to 10, the scale and dimensions of each component are exaggerated and some components may be omitted.

  FIG. 2 is a perspective view schematically showing the door stopper 1 according to the first embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of the door stopper 1 shown in FIG. As shown in FIG. 2, the door stopper 1 includes a main body portion 10 and a handle 20 (addition portion) protruding from the main body portion 10. In the cross section shown in FIG. 3, the door stopper 1 as a whole has a line-symmetric outer shape with respect to the center line Q1. As shown in FIGS. 2 and 3, the main body 10 of the door stopper 1 has a hemispherical shape including a convex curved surface 11 (hemispherical surface) and a plane 12, and is centered on the center line Q1. Axisymmetrically formed.

  As shown in FIGS. 2 and 3, the handle 20 includes a cylindrical portion 21 (first additional member) and a pair of projecting portions 22 and 22 (second additional member) connected above the cylindrical portion 21. ). The cylindrical portion 21 protrudes from the center C of the plane 12 of the main body portion 10 in a direction opposite to the direction in which the curved surface 11 protrudes and in a direction perpendicular to the plane 12 (projection direction J). The protrusions 22, 22 extend from the columnar part 21 to the opposite sides along a direction perpendicular to the protrusion direction J (a direction parallel to the plane 12).

  The main body 10 is made of, for example, polybutadiene rubber, ethylene propylene diene monomer (EPDM), or a combination thereof, and is formed to have a size of a radius of about 30 mm and a weight of about 60 g. On the other hand, the handle 20 is made of, for example, ethylene-vinyl acetate copolymer resin (EVA) or a hollow molded polyethylene resin, and is formed to have a length in the protruding direction J of about 100 mm and a weight of about 5 g. That is, the handle 20 is formed to be extremely light compared to the main body 10.

  As described above, the door stopper 1 is formed so as to be symmetric with respect to the center line Q1 and so that the handle 20 is lighter than the main body 10. As shown in FIG. 3, the door stopper 1 has a center of gravity M on the center line Q <b> 1 and inside the main body 10.

  Next, the operation when such a door stopper 1 is installed on the floor will be described. In addition, in this specification, a floor surface shall mean the surface of such a rug, when rugs, such as a carpet, are laid on the floor.

  First, consider a case where the door stopper 1 is placed on a horizontal floor surface U (horizontal plane) so that the protruding direction J matches the vertical direction. This state is a state in which the handle 20 protrudes in the vertical direction as shown in FIG. In this state, since the center line Q1 where the center of gravity M is located extends in the vertical direction, the door stopper 1 does not move from this state. That is, the state (reference state) in which the protruding direction J and the vertical direction coincide with each other is maintained. In this reference state, the tip portion 13 (first contact portion) of the curved surface 11 is in contact with the floor surface U.

  Next, consider the case where the door stopper 1 is tilted (tilted state) so that the protruding direction J is tilted with respect to the vertical direction (that is, as shown in FIG. 4). In this inclined state, the door stopper 1 is inclined leftward from the reference state in FIG. 3, and comes into contact with the floor surface U at a portion 14 (second contact portion) of the curved surface 11 different from the tip portion 13. ing. In this state, if a straight line Q2 (second straight line) extending in the vertical direction through the second contact portion 14 is defined, the center of gravity M is curved from the intersection N of the center line Q1 and the straight line Q2 and the curved line from FIG. It can be seen that it is located on a line segment of the center line Q1 connecting the tip portion 13 of the surface 11 and is biased to the right side of the straight line Q2. Here, since the surface with which the door stopper 1 contacts the floor surface U is a curved surface (curved surface 11) that is convex with respect to the floor surface U, the door stopper 1 in the inclined state of FIG. Due to the above action, the operation returns to the reference state shown in FIG.

  More specifically, as shown in FIG. 4, gravity G acts on the center of gravity M of the door stopper 1 in an inclined state, and this gravity G is directed from the center of gravity M toward the second contact portion 14. And a force F1 acting in a direction perpendicular to the force. And as a result of the clockwise moment T1 centering on the second contact portion 14 acting on the door stopper 1 by this force F1, the door stopper 1 rotates to the right while the curved surface 11 is in contact with the floor surface U. Finally, the reference state shown in FIG. 3 is restored. Since the door stopper 1 rotates while the curved surface 11 is in contact with the floor surface U in this way, the handle 20 does not contact the floor surface U until it returns from the inclined state to the reference state. Absent.

  Next, consider a case where the door contacts the door stopper 1 in the reference state of FIG. As described above, in this state, the door stopper 1 is in contact with the floor surface U at the distal end portion 13 of the curved surface 11. As shown in FIG. 5, the door stopper 1 is in contact with the door surface 91 at the door contact portion 15 and receives a force P from the door 90 toward the left side. The force P can be decomposed into a force acting from the door contact portion 15 toward the tip portion 13 and a force F2 acting in a direction perpendicular to the force, but the door stopper 1 is caused by the force F2. The counterclockwise moment T2 centered on the tip 13 is received. However, as described above, since the main body 10 is made of a material such as polybutadiene rubber and exhibits a large frictional force against the door surface 91 and the floor surface U, the door 90 is placed in place by the door stopper 1. Pressed and locked.

  This point will be described in more detail with reference to FIG. As described above, the door stopper 1 receives the force P from the door toward the left side. However, a large frictional force R1 from the floor surface U against the force P, that is, a frictional force R1 larger than the force P acts on the right side of the main body 10 of the door stopper 1. Therefore, the door stopper 1 is prevented from moving to the left from the state shown in FIG. Further, as described above, the door stopper 1 receives a counterclockwise moment T2 centering on the tip portion 13. However, since the door stopper 1 is in contact with the door surface 91 at the door contact portion 15, the door stopper 1 receives a large frictional force R <b> 2 from the door 90 downward in the vertical direction. This prevents the door stopper 1 from rotating counterclockwise by the moment T2. Thus, since the door stopper 1 does not move or rotate even if it is pushed by the door 90, the door 90 is pushed and locked in place by the door stopper 1.

  In this case, since the handle 20 is located radially inward from the outer peripheral edge of the plane 12, the handle 20 does not contact the door surface 91 of the door 90.

  As described above, according to the present embodiment, the door 90 can be pressed and locked at the position by the door stopper 1 in the reference state. Even if the user installs the door stopper 1 (without bending his / her body) and throws the door stopper 1 on the floor, the door stopper 1 is laid down (inclined). Since it automatically becomes the standard state like getting up and spilling, it is possible to save the trouble of cramping in order to properly install the door stopper. Thus, the door stopper 1 which concerns on this embodiment is excellent in installation ease.

  Furthermore, the door stopper 1 in the present embodiment includes a handle 20 configured so as not to contact the floor surface or the door surface. Therefore, since the user does not have to touch the dust and dirt on the floor surface and the door surface attached to the curved surface 11 by gripping the handle 20, the door stopper 1 is excellent in terms of hygiene.

  In addition, the door stopper 1 according to the present embodiment has a pair of projecting portions 22 and 22 (second additional members) extending from the cylindrical portion 21 to the opposite sides along the direction perpendicular to the projecting direction J. ing. Therefore, the user can easily remove the door stopper 1 by hooking his / her finger on the protrusions 22 and 22. Thus, according to the door stopper 1, the more excellent installation ease is exhibited. Needless to say, even when such a protruding portion is not provided, the door stopper 1 can be easily removed by gripping the cylindrical portion (first additional member).

  By the way, referring to FIG. 5, in the door stopper 1 described above, it can be seen that a part of the curved surface 11 (the door contact portion 15 in FIG. 5) of the door stopper 1 first contacts the door 90. That is, since a large frictional force acts between the door stopper 1 and the floor surface U and between the door stopper 1 and the door surface 91 when the door 90 first contacts, The stopper 1 pushes and locks the door 90 with almost no movement from the reference state of FIG. 3 (that is, with the tip 13 of the curved surface 11 in contact with the floor surface). As described above, in the configuration such as the door stopper 1, since the tip end portion 13 is always in contact with the floor surface U, the tip end portion 13 is worn or dust or dust on the floor surface is exposed to the tip end portion 13. It may adhere repeatedly and the frictional force of the tip 13 may be reduced. Thus, when the frictional force of the front-end | tip part 13 falls, the satisfactory door latching effect cannot be acquired. Therefore, in order to solve such a problem, for example, the door stopper 201 in the second embodiment of the present invention may be configured.

  Here, FIG. 6 is a perspective view schematically showing the door stopper 201, and FIG. 7 is a front view showing the operation of the door stopper 1. As shown in FIGS. 6 and 7, the door stopper 201 includes a main body portion 210 and a handle 20 that protrudes from the main body portion 210 in the protruding direction J. The main body 210 includes a hemispherical base portion 270 including the curved surface 11 (hemispherical surface) and the flat surface 12, and a disc-shaped substrate 230 fixed to the flat surface 12 of the base portion 270 with an adhesive or the like. Yes. The base 270 is made of, for example, polybutadiene rubber, ethylene propylene diene monomer (EPDM), or a combination thereof, and is formed with a radius of about 30 mm and a weight of about 60 g. With such a configuration, the base portion 270 exhibits a large frictional force against the floor surface U and the door surface 91 as with the main body portion 10 of the door stopper 1.

  As shown in FIGS. 6 and 7, the substrate 230 of the door stopper 201 has a radius (for example, a radius of about 32.5 mm) larger than the plane 12 that is the largest bulge portion of the base portion 270 and a protrusion of about 5 mm. It has a length (thickness) in the direction J, and is fixed to the plane 12 with an adhesive or the like so as to be concentric with the plane 12. In other words, the substrate 230 is fixed to the plane 12 so as to project outside the plane 12. A handle 20 having a weight of about 5 g protrudes in the protruding direction J from the center of the upper surface 231 of the substrate 230. Like the door stopper 1, the door stopper 201 is formed symmetrically with respect to the center line Q1 in the longitudinal section.

  As described above, the door stopper 201 is formed so as to have a line-symmetric outer shape with respect to the center line Q1, and so that the handle 20 is lighter than the base portion 270 (main body portion 210). Yes. And the door stopper 201 has the gravity center M on the center line Q1 inside the base part 270 similarly to the door stopper 1 (refer FIG. 3). With such a configuration, the door stopper 201 operates like a spill and rises like the door stopper 1.

  By the way, the board | substrate 230 of the door stopper 201 is formed from ethylene-vinyl acetate copolymer resin (EVA) etc., for example so that a small frictional force may be provided with respect to the floor surface U and the door surface 91 compared with the base part 270. Is done. By providing the substrate 230 exhibiting such a small frictional force, the door stopper 201 can provide the following operations and effects.

  First, in order to use the door stopper 201, it is assumed that the user throws the door stopper 201 onto the floor surface (without bending the body). As a result, the door stopper 201 is inclined and laid down sideways, but as with the door stopper 1, the door stopper 201 rises up like a spill and becomes the reference state shown in FIG. Note that, in this reference state, the tip end portion 13 (first contact portion) of the curved surface 11 of the base portion 270 is in contact with the floor surface U.

  Next, an operation when the door stopper 201 in the reference state is pushed by the door 90 will be described. As shown in FIG. 7, since the door stopper 201 includes a substrate 230 that projects outside the base portion 270, the door 90 first comes into contact with the outer edge portion 232 of the substrate 230. More specifically, the door 90 contacts the substrate 230 at the door contact portion 232A of the outer edge portion 232. Here, since the substrate 230 exhibits only a relatively small frictional force (a small frictional force compared to the base portion 270) with respect to the door surface 91 of the door 90, the door stopper 201 operates as follows.

  As shown in FIG. 7, the door stopper 201 receives a force P from the door 90 toward the left side. However, the door stopper 201 receives a large frictional force R <b> 1 (that is, through the distal end portion 13 of the curved surface 11 contacting the floor surface U). Since the frictional force R1) larger than the force P is received from the floor surface U, the leftward movement is prevented. However, as shown in FIG. 7, the force P from the door 90 can be decomposed into a force acting from the door contact portion 232A toward the tip portion 13 and a force F3 acting in a direction perpendicular to the force. By the force F3, the door stopper 201 receives a counterclockwise moment T3 centering on the front end portion 13. For this moment T3, a frictional force R3 from the door surface 91 acts on the door stopper 201 via the door contact portion 232A of the substrate 230 so as to resist the moment T3. Since the frictional force R2 (see FIG. 5) acting between the curved surface 11 of the door stopper 1 and the door surface 91 is small, the door stopper 201 rotates counterclockwise without resisting the moment T3. Go (tilt to the left).

  Thereafter, when the door stopper 201 rotates counterclockwise, the curved surface 11 comes into contact with the door surface 91 at the door contact portion 16 as shown in FIG. More specifically, the floor contact portion 17 of the curved surface 11 contacts the floor surface U, and the door contact portion 16 contacts the door surface 91. In this state, the door stopper 201 receives a large frictional force R1 from the floor surface U via the floor contact portion 17, and thus the door stopper 201 is prevented from moving to the left side. Further, the force P from the door 90 can be disassembled into a force acting from the door contact portion 16 toward the floor contact portion 17 and a force F4 acting in a direction perpendicular to the force. A counterclockwise moment T4 centered on the floor contact portion 17 is received by F4. However, for this moment T4, since a large frictional force R2 from the door surface 91 acts on the door stopper 201 via the door contact portion 16, the door stopper 201 may be rotated counterclockwise by the moment T4. Be disturbed. Thus, in the state of FIG. 8, the door stopper 201 is not pushed and moved or rotated by the door 90, so that the door 90 is held in place by the door stopper 201 (that is, The floor contact portion 17 and the floor surface U are in contact with each other.

  As described above, according to the door stopper 201, when the substrate 230 having a relatively small frictional force first contacts the door 90, the door stopper 201 rotates by a certain distance and is different from the front end portion 13. When the contact portion 17 comes into contact with the floor surface U, the door 90 is locked. In other words, the contact portion with the floor surface U at the time when the door 90 is locked becomes the floor contact portion 17 different from the tip portion 13, so that the tip portion 13 is worn out or only the tip portion 13 has a floor surface. U dust and dust are prevented from adhering. Therefore, according to this embodiment, the door locking effect can be maintained over a long period of time.

  Note that the handle 20 and the substrate 230 may be integrally formed in the door stopper 201. Thereby, the manufacturing cost of the door stopper 201 can be reduced.

  In the example of the door stopper 201 described above, the substrate 230 is formed in a disc shape. However, if the substrate 230 projects outside the base portion 270, the substrate 230 is not necessarily a disc.

  In the door stopper 201 according to the above-described second embodiment, the first addition member is configured as a columnar member (columnar portion 21). For example, the first addition member is from the viewpoint of design or the like. You may change the shape of a member suitably. For example, you may comprise the door stopper 101 in 3rd Embodiment demonstrated below.

  Here, FIG. 9 is a perspective view schematically showing the door stopper 101, and FIG. 10 is a longitudinal sectional view showing the door stopper 101. As shown in FIGS. 9 and 10, the door stopper 101 is formed symmetrically with respect to the center line Q <b> 3 (first straight line), and protrudes in the protruding direction J from the main body 10 and the main body 10. And a dome portion 120 (first additional member). Similar to the substrate 230 of the door stopper 201, the dome portion 120 is formed to exhibit a smaller frictional force on the floor surface and the door surface than the main body portion 10.

  As shown in FIG. 9 and FIG. 10, the dome portion 120 of the door stopper 101 is formed as a hollow partial ellipsoid with a lower portion missing, and is similar to the door stopper 1 in comparison with the main body portion 10. It is extremely lightweight. The dome portion 120 is formed so as to gradually contract after further bulging from the edge portion 12A of the plane 12 of the main body portion 10 (the maximum bulging portion of the main body portion 10). And the top part 122 of such a dome part 120 is located on the centerline Q3 which passes the center C of the plane 12, and is perpendicular | vertical to the plane 12. FIG.

  As described above, the door stopper 101 is formed so as to have an outer shape that is axially symmetric with respect to the center line Q <b> 3 and so that the dome portion 120 is lighter than the main body portion 10. As shown in FIG. 10, the door stopper 101 has a center of gravity M on the center line Q <b> 3 and inside the main body 10. Therefore, according to the door stopper 101, as with the door stoppers 1, 201, excellent installation ease and hygiene can be realized.

  Moreover, since the door stopper 101 has the dome part 120 which bulges further than the largest bulge part (plane 12) of the main body part 10, the door to be opened and closed is the largest bulge part of the dome part 120 first 123 (see FIGS. 9 and 10). Here, since the dome portion 120 exhibits only a small frictional force with respect to the door surface as compared with the main body portion 10, the door operates in the same manner as the door stopper 201 after contacting the maximum bulging portion 123 of the dome portion 120. To do.

  More specifically, when the door surface is in contact with the dome portion, only a small frictional force from the door surface acts on the dome portion 120, so the door stopper 101 rotates along the spherical surface of the main body portion 10. . After that, when the door stopper 101 rotates and the main body 10 comes into contact with the door surface, the door stopper 101 is prevented from moving and rotating by receiving a large frictional force from both the door surface and the floor surface. The door is locked in place.

  As described above, the door stopper 101 is configured to lock the door after rotating by a certain distance in the same manner as the door stopper 201. It is possible to prevent floor dust and dirt from adhering only to the portion 13. Therefore, according to this embodiment, the door locking effect can be maintained over a long period of time.

  In the first to third embodiments described above, the main body (or the base) is formed in a hemispherical shape, but the main body (or the base) may be formed in a spherical shape other than the hemisphere. Alternatively, it may be formed in a semi-ellipsoid. Further, the door stopper 1) has a curved surface that can contact both the horizontal surface and the door surface, and 2) is on a straight line that extends in the protruding direction through the floor contact portion in the reference state, and If the center of gravity is located at a position that acts so as to return from the tilted state to the reference state, the additional portion and the main body portion can be formed in an asymmetric outer shape.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and it goes without saying that the present invention may be implemented in various forms within the scope of the technical idea.

  The terms “lower”, “upper”, “bottom”, “top”, “upper”, “lower”, “upper”, “lower”, and other terms used in this specification are positional relationships. Are used in the context of the illustrated embodiment and vary with the relative positional relationship of the devices.

DESCRIPTION OF SYMBOLS 1 Door stopper 10 Main body part 11 Curved surface 12 Plane (maximum bulging part of a main body part)
12A Edge 13 Tip (first contact portion)
DESCRIPTION OF SYMBOLS 15 Door contact part 14 2nd contact part 16 Door contact part 17 Floor contact part 20 Handle 21 Cylindrical part (1st addition member)
22 Protruding part (second additional member)
90 door 91 door surface 101 door stopper 120 dome (first additional member)
122 Top portion 123 Maximum bulging portion of dome portion 201 Door stopper 210 Main body portion 230 Substrate 231 Upper surface 232 Outer edge portion 232A Door contact portion 270 Base portion M Center of gravity Q1 Center line (first straight line)
Q2 Second straight line Q3 Center line (first straight line)

Claims (8)

In the door stopper installed on the floor to lock the door,
A main body including a curved surface curved in a convex shape;
A first additional member projecting from the main body in a projecting direction opposite to the projecting direction of the curved surface;
The curved surface includes a first contact portion that can contact both the floor surface and the door surface of the door, and that contacts a horizontal surface in a reference state in which the protruding direction matches the vertical direction,
A position on the first straight line extending in the protruding direction through the first contact portion and acting so that the protruding direction returns from the inclined state inclined with respect to the vertical direction to the reference state. Has a center of gravity,
Door stopper. The curved surface further includes a second contact portion that contacts the horizontal surface in the inclined state,
When the second straight line passing through the second contact portion and extending in the vertical direction is defined in the inclined state, the center of gravity is the intersection of the first straight line and the second straight line, and the first straight line Located on the line segment of the first straight line connecting the contact portion of
The door stopper according to claim 1.   The door stopper according to claim 1, wherein the curved surface has a shape that is axially symmetric with respect to an axis extending in the vertical direction when in the reference state.   The door stopper according to claim 3, wherein the curved surface is a part of a spherical surface.   The said 1st addition member is formed so that it may protrude further outside rather than the largest bulging part of the said main-body part, and may exhibit a small frictional force with respect to the said door surface compared with the said curved surface. The door stopper as described in any one of 1-4. The main body is
A base having the curved surface;
A substrate connected to both the base and the first additional member;
The substrate is formed so as to protrude further outward than the maximum bulge portion of the base portion and to exhibit a small frictional force against the door surface as compared to the curved surface.
The door stopper as described in any one of Claim 1 to 4.   The door stopper according to claim 6, wherein the substrate and the first additional member are integrally formed.   The door stopper according to any one of claims 1 to 7, further comprising a pair of protrusions extending from the first additional member to opposite sides along a direction perpendicular to the protrusion direction.

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