JP6134582B2 - Safety cap - Google Patents

Description

  The present invention relates to a safety cap.

As a container with a misuse prevention function for preventing misuse by an infant or the like, for example, a configuration described in Patent Document 1 below is known. The container includes a container body, a cap, an annular body, and a spring. The cap is screwed into the mouth of the container body. The annular body is disposed between the container body and the cap in the up-down direction, and is fitted to the mouth of the container body so as to be movable up and down. The spring is disposed so as to be sandwiched between the container body and the annular body in the vertical direction, and urges the annular body upward. In each of the cap and the annular body, saw-toothed engagement portions are formed on the end faces facing each other in the vertical direction.
In this container, the meshing portions of the cap and the annular body mesh with each other, so that the cap is restricted from rotating toward the loose side along the circumferential direction with respect to the mouth of the container body. Misuse such as inadvertent removal from the mouth is prevented. When taking out the contents from the container, the cap is rotated toward the slack side in the circumferential direction in a state where the annular body is pushed down against the biasing force of the spring and the meshing of the meshing portions is released.

Japanese Utility Model Publication No. 49-79553

  However, in the conventional container, there is a possibility that the elastic force of the spring is lowered in the process of repeatedly opening and closing the cap, which may affect the misuse prevention function, and it is improved about cost reduction and simplification of manufacturing. There is room for.

  The present invention has been made in view of the above-described circumstances, and provides a safety cap capable of reliably continuing to exhibit a misuse prevention function over a long period of time while reducing costs and simplifying manufacturing. For the purpose.

In order to solve the above problems, the present invention proposes the following means.
A safety cap according to the present invention includes a cap body that is detachably screwed into a mouth of a container body, and an exterior body that is externally movable and rotatable on the cap body. Either one of the outer peripheral surface and the inner peripheral surface of the exterior body is provided with a projecting portion protruding in the radial direction, and the other of the outer peripheral surface of the cap body and the inner peripheral surface of the exterior body Is located on one side in the circumferential direction and faces the other side in the circumferential direction, extends in the cap axial direction, and tightens the cap body into the mouth portion along the circumferential direction. A shaft straight wall portion that rotates the cap body together with the exterior body by being locked to the protrusion when rotating the exterior body toward the outer surface, and one side in the circumferential direction that is located on the other side in the circumferential direction Facing the cap axial direction As it goes from one side to the other side, it is formed between the inclined wall portion that gradually extends from one side of the circumferential direction to the other side, the shaft straight wall portion, and the inclined wall portion, and extends in the circumferential direction. And a projection space in which the projection is movable in the circumferential direction, and extends over the entire circumference in the circumferential direction, and is connected to the movement space from the other side in the cap axial direction, so that the projection can move in the circumferential direction. A free running space, a regulating wall portion extending from the axial straight wall portion toward the other side in the circumferential direction and directed toward one side in the cap axial direction, and from the regulating wall portion toward one side in the cap axial direction extending to, when the cap body along the circumferential direction toward a loose side to loosen relative to the opening to rotate the outer body, the said cap body by engaging said protrusion exterior a locking wall portion rotating together with the body, the shaft straight wall portion, front A locking space defined by a restriction wall and the locking wall, connected to the idle space through the moving space, and a locking space in which the protrusion can move in the cap axis direction between the moving space; Is provided.

In the present invention, when the safety cap is screwed into the mouth of the container body, the exterior body is fixed to the tightening side in a state where the protrusion is positioned in the moving space or the locking space and locked to the shaft straight wall. The cap body is rotated together with the exterior body to be tightened with respect to the mouth portion.
In the safety cap screwed into the mouth portion in this manner, the exterior body is rotated to the loose side for loosening the cap body with respect to the mouth portion along the circumferential direction with the projection portion positioned in the movement space. Then, the protrusion moves in the circumferential direction in the moving space while sliding on the inclined wall, so that the cap body is prevented from rotating to the loose side together with the exterior body, and the protrusion is in the cap axial direction. It moves toward the other side of and reaches the idle space. Similarly, even if the exterior body is rotated to the loose side while the protrusion is positioned in the idle space, the cap body rotates together with the exterior body to the loose side even if the exterior body is rotated to the loose side. It can be suppressed.
In order to detach the safety cap from the mouth portion, the exterior body is rotated toward the loose side in a state where the protrusion is positioned in the locking space. At this time, the cap body rotates together with the exterior body to the loose side by locking the protrusion to the locking wall, and the cap body is detached from the mouth by loosening the screwing to the mouth of the cap body. .
According to this safety cap, it is possible to prevent the cap body from rotating to the loose side together with the exterior body by rotating the exterior body to the loose side with the protrusions positioned in the movement space. It becomes possible to exhibit the misuse prevention function without providing a spring like the conventional container, and to continue to reliably exert the misuse prevention function over a long period of time while reducing the cost and simplifying the production. be able to.

  Further, the axial straight wall portion and the inclined wall portion are connected via a circumferential straight wall portion extending in the circumferential direction and facing the other side in the cap axial direction, and the moving space is formed by the circumferential straight wall portion. The cap space is closed from one side in the cap axial direction, and the locking space is defined by the shaft straight wall portion and the circumferential straight wall portion in the moving space, and is connected to one end portion located on one side in the circumferential direction. May be.

  In this case, since the locking space is connected to one end of the moving space, the protrusion is moved in the cap axial direction while the protruding portion is positioned at one end of the moving space. It is possible to move the part from the moving space to the locking space, and it is possible to move the protrusion from the moving space to the idle space by moving the exterior body in the circumferential direction. Operability can be improved.

  The circumferential straight wall portion may protrude from the axial straight wall portion toward the other side in the circumferential direction with respect to the locking wall portion.

  In this case, since the circumferential straight wall portion protrudes from the axial straight wall portion toward the other side in the circumferential direction from the locking wall portion, for example, the protruding portion is located on the locking wall portion in the moving space. When passing through a portion adjacent to one side in the cap axis direction, the protrusion is moved in the circumferential direction while being in sliding contact with the circumferential straight wall, thereby stabilizing the position of the protrusion in the cap axis direction, The outer body can be moved in the circumferential direction while suppressing rattling of the outer body in the cap axial direction, and the operability of the safety cap can be further improved.

  The idling space may be closed from the other side in the cap axis direction by an annular wall portion extending over the entire circumference in the circumferential direction.

  In this case, since the idle space is closed from the other side in the cap axis direction by the annular wall portion extending over the entire circumference in the circumferential direction, the protrusion that moves in the idle space is moved from the idle space to the other in the cap axis direction. It is possible to restrict the escape to the side by the annular wall portion, and the operability of the safety cap can be improved.

  According to the safety cap of the present invention, it is possible to reliably continue to exhibit the misuse prevention function for a long period of time while reducing the cost and simplifying the production.

It is a longitudinal cross-sectional view of the safety cap which concerns on one Embodiment of this invention. It is a cross-sectional view of the exterior body which comprises the safety cap shown in FIG. It is a perspective view of the cap main body which comprises the safety cap shown in FIG. It is a figure explaining the effect | action of the safety cap shown in FIG. 1, Comprising: It is the figure which added the projection part to the expanded view of the outer peripheral surface of a cap main body.

Hereinafter, a safety cap according to an embodiment of the present invention will be described with reference to the drawings. This safety cap is a cap with a misuse prevention function that prevents misuse by an infant or the like.
As shown in FIGS. 1 to 4, the safety cap 10 includes a cap main body 11 that is detachably screwed into a mouth portion of a container body (not shown), and an outer casing that is externally movable and rotatable on the cap main body 11. And a body 12.

  Here, the cap body 11 is formed in a cylindrical shape with one end being an opening, and the exterior body 12 is formed in a tubular shape having both ends as openings, and the cap body 11 and the exterior body are formed. The 12 central axes are located on a common axis. Hereinafter, this common axis is referred to as a cap axis O, the top wall portion side of the cap body 11 along the cap axis O is referred to as the upper side (the other side in the cap axis direction), and the opening side of the cap body 11 along the cap axis O Is referred to as the lower side (one side in the cap axis direction), the direction orthogonal to the cap axis O is referred to as the radial direction, and the direction around the cap axis O is referred to as the circumferential direction.

A female thread portion is formed on the inner peripheral surface of the cap body 11. In the following, the side on which the cap body 11 is tightened with respect to the mouth of the container body along the circumferential direction is referred to as a tightening side (one side in the circumferential direction) D1, and the cap body 11 is disposed along the circumferential direction. The side to be loosened with respect to the mouth of the container body is referred to as a loose side (the other side in the circumferential direction) D2.
The cap body 11 and the exterior body 12 have the same size in the cap axis O direction. The exterior body 12 is exteriorly mounted on the cap body 11 so as to be relatively rotatable in the circumferential direction.

  On either one of the outer peripheral surface of the cap body 11 and the inner peripheral surface of the exterior body 12, a protruding portion 21 protruding in the radial direction is provided. The protruding portion 21 is provided on the inner peripheral surface of the exterior body 12 so as to protrude inward in the radial direction. A plurality of protrusions 21 are provided on the exterior body 12, two in the illustrated example. The plurality of protrusions 21 are provided at equal intervals in the circumferential direction. The plurality of protrusions 21 are formed in the same shape and size, and are provided at the same position in the cap axis O direction. The protrusion 21 is formed in a cylindrical shape whose end surface is a convex spherical shape.

  As shown in FIGS. 3 and 4, in this embodiment, a moving space 22 is provided on the outer peripheral surface of the cap body 11, which is the other of the outer peripheral surface of the cap main body 11 and the inner peripheral surface of the exterior body 12. And an idling space 23 are provided. The moving space 22 and the idling space 23 are constituted by concave portions provided on the outer peripheral surface of the cap body 11.

  The moving space 22 is located below the idling space 23. The moving space 22 extends in the circumferential direction, and the protrusion 21 is movable in the circumferential direction. The moving space 22 is closed from the lower side and opened toward the upper side. A plurality of moving spaces 22 are provided at intervals in the circumferential direction, and an even number in the illustrated example. The plurality of moving spaces 22 are formed in the same shape and size as each other, and are provided at the same position in the cap axis O direction.

  The moving space 22 is between the shaft straight wall portion 24 positioned on the tightening side D1 in the circumferential direction and facing the loose side D2, and the inclined wall portion 25 positioned on the loose side D2 in the circumferential direction and facing the tightening side D1. Is formed. The shaft straight wall portion 24 extends straight in the cap axis O direction. The inclined wall portion 25 extends while being inclined from the circumferential tightening side D1 toward the loosening side D2 gradually from the lower side toward the upper side.

  The axial straight wall portion 24 and the inclined wall portion 25 are connected via a circumferential straight wall portion 26. The circumferential straight wall portion 26 extends straight in the circumferential direction and faces upward. The lower end edges of the shaft straight wall portion 24 and the inclined wall portion 25 are arranged at the same position in the cap axis O direction, and are connected via the circumferential straight wall portion 26.

  The idle space 23 is located above the moving space 22. The idle space 23 extends over the entire circumference in the circumferential direction and is connected to the moving space 22 from above. In the idling space 23, the protrusion 21 is movable over the entire circumference. The idling space 23 is defined by an annular wall portion 27 positioned on the upper side and facing downward, and a guide wall portion 28 positioned on the lower side and facing upward.

  The annular wall portion 27 extends over the entire circumference in the circumferential direction, and closes the idle space 23 from above. A plurality of guide wall portions 28 are arranged at intervals in the circumferential direction, and between the guide wall portions 28 adjacent in the circumferential direction are connection openings 23 a connected to the moving space 22.

  An edge of the guide wall portion 28 on the tightening side D1 in the circumferential direction is provided at a position equivalent to the axial straight wall portion 24 in the circumferential direction. An edge of the guide wall 28 on the slack side D2 in the circumferential direction is located closer to the tightening side D1 than an edge of the slack side D2 of the circumferential straight wall 26. A hanging wall portion 29 extending downward is provided at an end edge of the guide wall portion 28 on the slack side D2 in the circumferential direction. The hanging wall 29 faces the slack side D2 in the circumferential direction, and the connection opening 23a is provided between the hanging wall 29 and the inclined wall 25 in the circumferential direction.

Here, in the present embodiment, the outer peripheral surface of the cap body 11 is further provided with a regulation wall portion 30, a locking wall portion 31, and a locking space 32.
The restriction wall portion 30 extends straight from the upper edge of the axial straight wall portion 24 toward the slack side D2 in the circumferential direction, and faces downward. An edge of the regulation wall portion 30 on the slack side D2 in the circumferential direction is located on the tightening side D1 with respect to the hanging wall portion 29.

  The locking wall portion 31 extends straight downward from the restriction wall portion 30 and faces the tightening side D1 in the circumferential direction. The lower edges of the locking wall portion 31 and the hanging wall portion 29 are arranged at equivalent positions in the cap axis O direction, and are connected via the connection wall portion 33. The connection wall portion 33 extends straight in the circumferential direction and faces downward. The connection wall portion 33 and the circumferential straight wall portion 26 are spaced apart in the cap axis O direction so that the projection 21 can pass between them in the circumferential direction.

  The locking space 32 is defined by the shaft straight wall portion 24, the restriction wall portion 30, and the locking wall portion 31. The locking space 32 is connected to the idling space 23 through the moving space 22, and the protrusion 21 can move in the cap axis O direction with respect to the moving space 22. The locking space 32 is defined by the shaft straight wall portion 24 and the circumferential straight wall portion 26 in the moving space 22 and is connected to one end portion 22a located on the tightening side D1 in the circumferential direction.

  Here, the guide wall portion 28, the hanging wall portion 29, the connection wall portion 33, the locking wall portion 31, the regulating wall portion 30, the shaft straight wall portion 24, the circumferential straight wall portion 26, and the inclined wall portion 25 are bent. These wall portions constitute an intermediate wall surface body 34 extending continuously in the circumferential direction. A plurality of intermediate wall surfaces 34 are provided on the outer peripheral surface of the cap body 11 in the circumferential direction. The intermediate wall surfaces 34 adjacent to each other in the circumferential direction are connected to each other, and the edge on the tightening side D1 in the circumferential direction of the guide wall portion 28 constituting the one intermediate wall surface 34 is the one intermediate wall surface 34. Are connected to the upper edge of the inclined wall portion 25 constituting another intermediate wall surface 34 adjacent from the tightening side D1.

  And the some intermediate | middle wall surface body 34 comprises the continuous wall 35 extended continuously over the perimeter of the circumferential direction by mutually connecting in the circumferential direction. The continuous wall 35 forms the moving space 22, the idle space 23, and the locking space 32 between the annular wall portion 27. The moving space 22, the idling space 23, and the locking space 32 have the same size (depth) with respect to each other in the radial direction, and the protruding portion 21 can be disposed.

  Next, the operation of the safety cap 10 configured as described above will be described.

  When the safety cap 10 is screwed into the mouth portion of the container body, first, for example, the cap body 11 and the exterior body 12 are relatively rotated, so that the protruding portion 21 is moved to the one end portion 22a of the moving space 22. To be located. At this time, each of the plurality of protrusions 21 is simultaneously positioned in a plurality of different moving spaces 22. And the exterior body 12 is rotated to the fastening side D1 of the circumferential direction in the state which latched the projection part 21 to the axial straight wall part 24. FIG. At this time, the protrusion 21 and the shaft straight wall 24 are engaged with each other, whereby the cap body 11 rotates to the tightening side D1 together with the exterior body 12, and the cap body 11 is tightened with respect to the mouth.

  In the safety cap 10 screwed into the mouth portion in this way, as shown by a solid line P0 in FIG. 4, the protruding portion 21 is positioned at one end portion 22a of the moving space 22 and is lowered by the circumferential straight wall portion 26. Supported from the side. As shown in FIG. 1, the cap main body 11 and the exterior body 12 are disposed at the same position in the direction of the cap axis O in a state where the protruding portion 21 is supported by the circumferential straight wall portion 26.

  When the exterior body 12 is grasped and rotated to the slack side D2 in the circumferential direction with the projection 21 positioned in the movement space 22, the projection 21 moves on the circumferential straight wall portion 26, and then is shown in FIG. As indicated by a two-dot chain line P2, by moving the moving space 22 in the circumferential direction while sliding on the inclined wall portion 25, the cap body 11 is prevented from rotating together with the exterior body 12 to the loose side D2, and the exterior While the body 12 is idling, the protrusion 21 moves upward and reaches the idle space 23 as indicated by a two-dot chain line P3 in FIG.

  Thereafter, for example, while holding the outer body 12 in a state where the container body is in an upright posture, while maintaining the relative positional relationship between the cap body 11 and the outer body 12 in the cap axis O direction, Similarly, even when the exterior body 12 is rotated to the slack side D <b> 2 in the circumferential direction, the cap body 11 rotates to the slack side D <b> 2 in the circumferential direction together with the exterior body 12 by the protrusion 21 moving in the idle space 23. It is suppressed, and the exterior body 12 is also idle. At this time, when the gripping of the exterior body 12 is released in a state where the protrusion 21 is positioned not on the guide wall portion 28 but on the connection opening portion 23a, the exterior body 12 is lowered by its own weight and returned to the moving space 22. However, after that, when the exterior body 12 is rotated to the slack side D2 in the circumferential direction, the protruding portion 21 reaches the idle space 23 again.

  Here, in order to detach the safety cap 10 from the mouth, from the state where the protrusion 21 is positioned at the one end 22 a of the moving space 22, the outer body 12 is grasped and the cap body 11 is moved upward. As shown by a two-dot chain line P1 in FIG. 4, the protrusion 21 is positioned in the locking space 32, and then the exterior body 12 is moved toward the circumferential loose side D2. At this time, the cap body 11 rotates to the loose side D <b> 2 together with the exterior body 12 by the protrusion 21 being locked to the locking wall portion 31, and the screwing of the cap body 11 to the mouth is loosened, and the cap body 11. Is removed from the mouth. When the gripping of the exterior body 12 that has been lifted upward is released, the exterior body 12 is lowered by its own weight, and the protrusion 21 is positioned at one end 22 a of the moving space 22.

  As described above, according to the safety cap 10 according to the present embodiment, the cap body 11 is rotated by rotating the exterior body 12 toward the slack side D2 in the circumferential direction with the protrusion 21 positioned in the moving space 22. Can be prevented from rotating to the loose side D2 together with the exterior body 12, so that it is possible to exert a misuse prevention function without providing a spring as in the conventional container, thereby reducing costs and manufacturing. While simplifying, the function of preventing misuse can be reliably exhibited over a long period of time.

  Further, since the locking space 32 is connected to the one end 22a of the moving space 22, the exterior body 12 is moved in the direction of the cap axis O in a state where the protrusion 21 is positioned at the one end 22a of the moving space 22. It is possible to move the protrusion 21 from the movement space 22 to the locking space 32 by moving it, and the protrusion 21 is moved from the movement space 22 to the idle space 23 by moving the exterior body 12 in the circumferential direction. And the operability of the safety cap 10 can be improved.

  Further, since the circumferential straight wall portion 26 protrudes from the axial straight wall portion 24 toward the other side in the circumferential direction with respect to the locking wall portion 31, for example, the protruding portion 21 is a connecting wall portion in the moving space 22. When passing between 33 and the circumferential straight wall portion 26, the protrusion 21 is moved in the circumferential direction while being in sliding contact with the circumferential straight wall portion 26, so that the position of the protrusion 21 in the cap axis O direction is changed. The outer casing 12 can be moved in the circumferential direction while stabilizing and suppressing rattling of the outer casing 12 in the cap axis O direction, and the operability of the safety cap 10 can be further improved.

  Further, since the idle space 23 is closed from the upper side by the annular wall portion 27 extending over the entire circumference in the circumferential direction, the annular wall portion prevents the protruding portion 21 moving in the idle space 23 from coming out of the idle space 23 upward. 27, the operability of the safety cap 10 can be improved.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the circumferential straight wall portion 26 protrudes from the axial straight wall portion 24 toward the slack side D2 in the circumferential direction from the locking wall portion 31, but is not limited thereto. It does not have to protrude. Further, the circumferential straight wall portion 26 may not be provided. In this case, for example, the shaft straight wall portion and the inclined wall portion may be directly connected.

In the above embodiment, a plurality of moving spaces 22 are provided in the circumferential direction, but the present invention is not limited to this. For example, only one moving space may be provided in the circumferential direction.
Furthermore, in the said embodiment, although the exterior body 12 shall be formed in the cylinder shape by which both ends were made into the opening part, it is not restricted to this. For example, the exterior body may be formed in the top cylinder shape by which the lower end was made into the opening part.

  Moreover, in the said embodiment, although the moving space 22, the idling space 23, and the latching space 32 shall be comprised by the recessed part provided in the outer peripheral surface of the cap main body 11, it is not restricted to this. For example, the shaft straight wall portion, the inclined wall portion, the regulating wall portion and the locking wall portion are formed in a plate shape protruding radially from the outer peripheral surface of the cap body, and the moving space, the idling space and the locking space are You may be comprised by the space enclosed by each plate-shaped wall part.

  Moreover, in the said embodiment, the inclined wall part 25 is gradually extended toward the loose side D2 from the tightening side D1 of the circumferential direction as it goes to the upper side from the lower side in the cap axis | shaft O direction, or the idling space 23 is formed. Although connected to the moving space 22 from the upper side, it is not limited to this. For example, the inclined wall portion gradually extends from the tightening side in the circumferential direction toward the loose side as the cap axial direction moves from the upper side (one side) to the lower side (the other side). It may be connected to the space from below.

  In the embodiment, the protrusion 21 is provided on the inner peripheral surface of the exterior body 12, and the shaft straight wall portion 24, the inclined wall portion 25, the moving space 22, the idle space 23, and the regulating wall are provided on the outer peripheral surface of the cap body 11. Although the portion 30, the locking wall portion 31, and the locking space 32 are provided, the present invention is not limited to this. For example, an axial straight wall portion, an inclined wall portion, a moving space, an idle space, a regulating wall portion, a locking wall portion, and a locking space are provided on the inner peripheral surface of the exterior body, and a protrusion is formed on the outer peripheral surface of the cap body. It may be provided. In this case, the shaft straight wall portion is formed to be positioned on the slack side (one side) in the circumferential direction and facing the tightening side (the other side), and the inclined wall portion is positioned on the tightening side in the circumferential direction. It is possible to reverse the positional relationship in the circumferential direction with the safety cap 10 according to the above-described embodiment, for example, by forming it so as to face the loose side.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 Safety cap 11 Cap main body 12 Exterior body 21 Protruding part 22 Moving space 22a One end part 23 Free running space 24 Axis straight wall part 25 Inclined wall part 26 Circumferential straight wall part 27 Annular wall part 30 Restriction wall part 31 Locking wall part 32 Engagement Stop space O Cap shaft

Claims (4)

A cap body detachably screwed to the mouth of the container body;
An exterior body that is externally movable and rotatable on the cap body,
Either one of the outer peripheral surface of the cap body and the inner peripheral surface of the exterior body is provided with a protruding portion that protrudes in the radial direction,
On the other of the outer peripheral surface of the cap body and the inner peripheral surface of the exterior body,
Positioned on one side in the circumferential direction, facing the other side in the circumferential direction and extending in the cap axial direction, toward the tightening side for tightening the cap body against the mouth portion along the circumferential direction When rotating the exterior body, the shaft straight wall portion that rotates the cap body together with the exterior body by being locked to the protrusion,
An inclined wall portion that is located on the other side in the circumferential direction and faces one side in the circumferential direction and gradually extends from one side in the circumferential direction toward the other side from the one side in the cap axis direction;
A moving space formed between the axial straight wall portion and the inclined wall portion and extending in the circumferential direction; and the protrusion is movable in the circumferential direction;
An idle space that extends over the entire circumference in the circumferential direction and is connected to the moving space from the other side in the cap axial direction, and the protrusion is movable in the circumferential direction,
A regulating wall portion extending from the axial straight wall portion toward the other side in the circumferential direction and facing toward one side in the cap axial direction;
Extend toward from the regulating wall portion on one side of the cap axis direction, when the cap body along the circumferential direction toward a loose side to loosen relative to the opening to rotate the outer body, wherein A locking wall portion for rotating the cap body together with the exterior body by locking to the protrusion ,
The shaft straight wall portion, the restriction wall portion, and the locking wall portion are defined, connected to the idle space through the moving space, and the protrusion moves between the moving space in the cap axis direction. A safety cap, characterized in that a possible locking space is provided. The safety cap according to claim 1,
The axial straight wall portion and the inclined wall portion are connected via a circumferential straight wall portion extending in the circumferential direction and facing the other side in the cap axial direction,
The moving space is closed from one side in the cap axial direction by the circumferential straight wall portion,
The locking cap is defined by the shaft straight wall portion and the circumferential straight wall portion of the moving space, and is connected to one end portion located on one side in the circumferential direction. . A safety cap according to claim 2,
The said safety | security cap characterized by the said circumference straight wall part projecting toward the other side of the circumferential direction rather than the said locking wall part from the said axial straight wall part. The safety cap according to any one of claims 1 to 3,
The idling space is closed from the other side in the cap axial direction by an annular wall portion extending over the entire circumference in the circumferential direction.

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