JP2012153409A - Fixed quantity variable discharging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixed quantity variable discharging container in which there is an individual difference in a discharging amount when using a detergent or the like by a discharging container having a pump dispenser for discharging a chemical of a quantity corresponding to the push-down of a nozzle head, in particular, the stroke of the low capacity type discharging container is short, the degree of the nozzle head push-down is delicate, the disadvantage of a conventional fixed quantity variable discharging container is that a structure for a fixed quantity variation forms an obstacle when the fixed quantity variation is not desired, and the same method of use as that of the conventional discharging container is desired if fixed quantity adjustment is not required.SOLUTION: In the fixed quantity variable discharging container having a stopper capable of performing the discharge adjustment, a means which can be split by a cutout in a ring form in order to vary the discharge quantity by limiting the vertical movement of the physical push-down of the nozzle head is provided on the stopper fitted to prevent any unexpected push-down of the nozzle head when shipping the discharge container.

Description

  The present invention allows a constant amount of liquid to be discharged quickly and easily only when it is desired to vary the amount of liquid discharged by a pump dispenser in a discharge container called a push pump / pump bottle or the like according to the user's discretion. The present invention relates to a quantitative variable discharge container that can be used.

  2. Description of the Related Art Conventionally, a discharge container in which a dispenser that discharges a chemical solution from a discharge port by pressing the nozzle head (1) is attached to a container cap portion is used as a discharge container that is often used for a detergent or the like. .

  The discharge container is roughly divided into two types. The discharge container shown in FIG. 1 has a configuration of a conventional general discharge container. The upper part of the cap (5) of the container (6) has a dispenser fixing member (4). The function of the fixing member is to fix the nozzle head in addition to the role of fixing the container cap and the pump member. A storage screw (2) is provided. The general appearance feature of the general discharge container is that the push-down shaft (3) connected to the pump portion (7) below the nozzle head is exposed, so that when the push-down shaft is pushed down, the shaft enters the pump portion. is there.

  In the discharge container shown in FIG. 2, since the container cap member has a convex shape (8) and the projecting portion also serves as a shaft, the push-down shaft below the pump head is built in the cap, and the nozzle The movement of the shaft is not visible when the head is pushed down, and the feature is that the shaft can be pushed down by the height of the nozzle head member within the range of the height of the shaft of the protruding part of the convex cap. Therefore, the height of the nozzle head is required to be in a depressible range (9) and is designed to be long. The advantage of this type is that it prevents liquid from entering the pump from the outside. To fix the nozzle head in the shipping state, a stopper (more specifically, a hollow with a gripping part (17) is attached to the shaft of the cap. A cylindrical nozzle with a slit (16), and the vertical length of the cylinder is a height within the range where the nozzle head can be pushed down. ) (10) is generally fitted and shipped while preventing unexpected discharge. The temporary nozzle head fixing member is hereinafter referred to as a stopper. In addition, since the stopper is temporarily used at the time of shipment, it is often discarded except when it is desired to temporarily fix the nozzle head again after using the discharge container.

  The present invention particularly relates to a quantitative variable discharge container of a discharge container of the type shown in FIG.

JP2009-298422A Republished WO2003 / 048002

Conventionally, when a detergent or the like is used in a pump dispenser that discharges a chemical liquid corresponding to a depression of a nozzle head used in a discharge container, there is an individual difference in the amount to be discharged. The discharge container provided by the manufacturer could not change the discharge amount freely, and it was necessary to devise such as pushing the nozzle head about half to use a small amount. However, it is difficult from the viewpoint of ecology because it is difficult to push down the nozzle head when the body is inconvenient, or when it is used by children, even if a small amount is often sufficient, it is discharged wastefully. It wasn't. Conversely, if the discharge amount for one stroke is insufficient, the nozzle head must be pressed multiple times, and the desired amount of solution is not necessarily a multiple of one stroke, There was inconvenience in adjusting. In particular, the discharge container of the type shown in FIG. 2 often has a short stroke, and it has been difficult to adjust the discharge amount by simply adjusting the discharge amount.

  Therefore, as will be described below, various quantitative variable discharge containers have been proposed. However, when the quantitative adjustment is not necessary, the function is often inconvenient. Therefore, the present invention invents that when there is no need for quantitative adjustment, it can be used completely differently from a conventional discharge container that does not have a quantitative variable discharge function.

According to the method shown in the prior art document 1, it is a method in which a plurality of discharge adjusting tools having the same shape are fitted to the stem of the pump device (the shaft below the nozzle head). The outer diameter of the shaft below the nozzle head of the discharge container varies depending on the type of discharge container, and it is unclear to the user which adjustment tool should be selected. Even if it is attached to the container, it can be used after it has been removed one by one, or even if it is attached to the side of the container, it is unnecessary if it is not desired to change the discharge. The shape of the adjuster is also circular, so it is difficult to grasp and cannot be removed smoothly, and since all of the adjusters are the same size, it requires a number of discharge adjusters for the adjustment stage and is connected by a string-like member. Even if it was allowed, it was inconvenient to handle.
The present invention solves the above problems.

(A) Stopper fitted to prevent the nozzle head from being unexpectedly pushed down at the time of shipment in the pump dispenser of the discharge container in which the chemical liquid corresponding to the amount pushed down is distributed from the discharge port when the nozzle head (1) is pushed down A stopper (21) capable of adjusting discharge, characterized in that (10) is provided with a function capable of adjusting the discharge amount by physically limiting the range (9) in which the nozzle head can be pushed down. A quantitative variable discharge container with a label is provided. More specifically, the function that can be adjusted includes a dividing means (19) for forming a lateral groove or a spiral groove on the stopper inner diameter, partially providing a convex concave portion, or partially providing a cut. With a stopper that can adjust the discharge,
(A) It is easy to fit in the part which a nozzle head moves up and down, and to remove easily.
(B) When fitted, the nozzle head is fixed and does not move even if the nozzle head is pressed. (A) and (B) are performed within a range not departing from the two original purposes.
(B) The stopper capable of adjusting the discharge is characterized by providing a dividing means such as a groove or a partial cut so that it can be divided into a plurality of ring shapes. To divide by hand only, or to divide only by hand, if (A) and (B) described in (a), which is the original purpose of the stopper, is not achieved, it is easy to use scissors and other cutting means. Provided is a quantitative variable discharge container with a stopper capable of adjusting the discharge as described in (A), which is within a range that can be divided. The best shape of the stopper is that only the side surface (18) of the stopper gripping portion (17) has connectivity (13) and is divided into a ring shape (A) and (B). It is a stopper capable of adjusting the discharge satisfying the purpose of).
(C) The stopper division where discharge adjustment is possible is characterized by having dividing means equally to make it as easy to understand as possible. The user can divide the stopper as high as he wants to push it down. The remaining stopper is re-inserted into the depressible range and the nozzle head is pushed down to limit the vertical movement of the nozzle head, so that the required amount of discharge liquid can be obtained and divided. The stoppers that can be adjusted for discharge are those that do not have any problem in pushing down the nozzle head even if two or more stoppers are fitted to the shaft. A quantitative variable discharge container with a label is provided.
(D) A stopper capable of adjusting discharge is intended to maintain strength, so that the number of dividing means is as small as possible and the number of discharge stages is increased. The dividing ratio is set to 1: 2, 1: 1, 2, or 1 Pairs of two-to-two, one-to-three-to-two, one-to-two-to-four, one-to-three-to-two-to-two, one-to-three-to-three-to-two, etc. By providing, for example, when the dividing means is provided at a ratio of 1: 3: 3: 2, three ring-shaped divided portions are provided for one stopper, and up to 9 stages can be divided into a maximum of two locations. Can be adjusted. Provided is a quantitative variable discharge container fitted with a stopper that enables discharge adjustment using the dividing method described above. In that case, the side of the stopper provided with the dividing means shows the number of the dividing ratio, and for easier understanding, the ratio that can be combined with the dividing ratio corresponds to the stopper and corresponds to the circle according to the height It is better to make it easy to determine the division position by displaying (20) within the range of the height of the necessary member, for example, by entering the number. Even if all are divided, the total number of division contrasts can be adjusted in stages. There are no problems in pushing down the nozzle head even if two or more of the divided stoppers capable of adjusting the discharge are fitted to the shaft. The discharge adjustment described in (a) or (b) is possible. A quantitative variable discharge container with a stopper is provided.
(E) In addition to the stopper dividing method shown in (c) and (d), in order to allow the user to easily divide and to reduce the number of dividing means as much as possible, one-to-two or one-to-one pair 2 or 1 to 1 to 3 or 1 to 1 to 1 to 3 or 1 to 1 to 1 to 4 or 1 to 1 to 1 to 1 to 4 or 1 to 1 to 1 to 1 to 5 By obtaining the dividing means at a ratio of very similar ratios, it is possible to easily adjust stepwise by the total number of the divided contrasts. In that case, it is preferable to make it easy to determine the division position by displaying a ratio number on the side surface of the stopper in an easy-to-understand manner. There are no problems in pushing down the nozzle head even if two or more of the divided stoppers capable of adjusting the discharge are fitted to the shaft. The discharge adjustment described in (a) or (b) is possible. A quantitative variable discharge container with a stopper is provided.
(F) Stopper with adjustable discharge shown in any one of (i) to (e), when the discharge amount is to be changed frequently, the flat part on the side of the gripping part has connectivity and discharge The stopper part that is not necessary for adjustment can be temporarily bent on the back side, and the stopper part necessary for adjustment can be fitted to the shaft, making it easy to adjust and preventing the loss of parts. (E) Provided is a quantitative variable discharge container with a stopper capable of adjusting discharge according to any one of the above.
(G) In the discharge container in which the protruding portion of the convex cap (8) of the discharge container is within the nozzle head depressible range, the height of the nozzle head member is equal to the length of the depressible shaft. A ring-shaped convex portion (14) having the same length as the C-shaped thickness of the stopper is provided at two locations, the upper portion (or the outer peripheral side surface of the nozzle head upper surface) and the lower portion, and the surface of the concave portion formed on the side surface of the nozzle head is The stopper attached to the nozzle head fixing member at the time of shipment is designed to fit perfectly and does not deviate vertically. This is used as the stopper storage part (15), and the stopper is attached to the discharge port part of the nozzle head of the discharge container. It is characterized by preventing the stopper from being lost by either fitting it so that the slit (16) part comes or by providing a stopper storage part at the bottom of the discharge port. To provide a dispensing container that was.
(H) In order to realize the stopper storage method described in (g), the shape of the stopper is the upper surface of the stopper as long as it does not deviate from the original purpose of the stopper shown in (A) and (B) in (a). Since the nozzle head fixing member has a shape that has a slit to be fitted to the shaft from the side to the hollow column that is slightly elliptical from the C shape seen from above, the inner diameter of the stopper can be slightly expanded. Provided is a stopper that can be fitted to the outer diameter of a shaft that is accommodated, and can be fitted to the outer shape of a nozzle head that is slightly larger than the outer diameter. In addition, the stopper storing method described in (g) is possible by making the inner diameter of the stopper slightly wider than the outer periphery of the push-down shaft within the range of the original purpose described in (A) and (B). Become. In addition, the conventional nozzle head fixing stopper also has a certain extent of inner diameter, so this is not limited as long as it can be fitted to the side surface of the nozzle head.
(Ii) The stopper attached for the purpose of fixing the nozzle head at the time of delivery of the discharge container may not have the shape described in FIG. 2 (c), but basically the nozzle head can be pushed down. It is characterized by having a portion that wraps the outer periphery of the push-down shaft within the range. In the case of the stopper, any one of (i) to (h) is provided with a cutting means that can be divided only into a portion that restricts the push-down of the outer periphery of the push-down shaft shown in FIG. A quantitative variable discharge container with a stopper as described in 1. is provided.
(N) In order to fix the nozzle head again with the discharge container described in (G) or (H), or to change the adjustment amount by dividing the stopper, the divided stopper is temporarily used as a nozzle. It became possible to fit on the side of the head. However, in this case, there is a possibility that the holding part of the stopper may be in the way. Therefore, the holding part of the stopper should be held within the range where there is no problem in the strength described in any of (i) to (ri). Provided is a quantitative variable discharge container with a stopper capable of adjusting discharge according to any one of (i) to (ii), which is provided with a cutting means such as a notch that can be cut off or a groove. In this case, when the stopper is provided with connectivity, it may be provided on any one of the C-shaped outer circumferences.

  The quantitative variable discharge container of the present invention is the most characteristic and advantageous in that it can be used in exactly the same way as when a conventional general discharge container is used unless quantitative variable discharge is desired. However, it was devised so that only the person who wants to adjust the discharge amount can make the discharge amount variable, which is not available in the prior art.

  According to the present invention, since only the shape of one member that was originally necessary to fix the nozzle head is changed, the manufacturing cost is not so high and the commercial value is increased. In addition, since the discharge amount can be adjusted, the maximum discharge capacity that can be obtained with a single stroke of the pump so far can be increased and products can be provided, which is also advantageous for manufacturers, and the user can adjust the discharge amount range. It becomes very convenient for both sides by spreading.

  In addition, since a member that is often discarded is changed to a member that does not waste the chemical solution, the chemical solution discharge container is very environmentally friendly. In particular, when a child uses a discharge container, the push-down operation is unfamiliar and the wasteful discharged chemical liquid pollutes the environment, regardless of the small body and the small amount of chemical liquid required. In addition, for example, when it is originally desired to obtain a chemical liquid discharge with a stroke of 1.5 times, the second press-down requires a delicate press-up / down. With this, you can get the necessary amount, and you can get your own chemical without stress and without stress.

In addition, since the stopper storage part is provided in the nozzle head with simple processing, even if a stopper is necessary to fix the nozzle head again after use, a stopper is necessary only to adjust the discharge. In addition, when a stopper is required for both applications, the stopper can be easily moved and the user can avoid losing the stopper.

  In addition, in the case of a consumer who originally does not need to fix the nozzle head or adjust the discharge, it is completely different from the conventional usage.

General discharge container (a) Front view (b) Cross section Discharge container (a) Front view (b) Cross section (c) Stopper perspective view The perspective view which shows the use condition of this invention, a division | segmentation stopper The perspective view which shows the use condition of this invention, a connection stopper Stopper perspective view of the present invention Example of dividing means obtained with a division ratio of 2 to 3 to 1. The front view which looked at the stopper of FIG. 5 from the holding part

  In the case of a discharge container of the type shown in FIG. 2 in which the container cap has a convex shape and the protruding part also serves as a shaft, a stopper that is mounted to fix the nozzle head in the shipping state is used. It is.

  Although the stopper may not have the shape shown in FIG. 2 (c) in general, the stopper basically has a portion that wraps the outer periphery of the push-down shaft within the pushable range of the nozzle head. In the case of the stopper, the stopper within the pressing range as shown in FIG. 2C is provided by the cutting means that can be divided only into the portion that restricts the pressing down of the outer periphery of the pressing shaft shown in FIG. It becomes a quantitatively variable discharge container that can be divided and used so as to fit.

  In the case of the stopper having the general shape shown in FIG. 2 (c), first remove the nozzle head fixing stopper from the discharge container, and adjust the discharge using a ring or hand or scissors to adjust the discharge. Divide the required height while observing the division ratio displayed on the stopper with adjustable discharge. In this case, you may divide | segment at the place which gave all the division means. A stopper that is not required when completely separated and divided is fitted into the stopper storage portion on the side of the nozzle head. In short, when a large amount of discharge is desired, the stopper is fitted with a small height, and when a small amount of discharge is acceptable, the stopper is fitted with a high height on the shaft.

  In addition, if the stopper is connected only from the side of the gripping part from the beginning or the splitting method is to be in that state, the height other than the stopper for the height required for adjustment is bent to the back side, and the height required for discharge adjustment By fitting this stopper on the shaft of the lower part of the nozzle head that can be pushed down, the nozzle head can be pushed down and the discharge can be restricted. FIG. 4 shows the embodiment, but the connecting portion is drawn in an easy-to-understand manner, and the connecting portion is made downward so as not to be obstructed by fitting a stopper. However, even in that case, if the connecting part of the stopper is in the way, it can be separated and used.

  When it is desired to fix the nozzle head again, it is fixed by pushing down the divided stoppers from the side surface of the nozzle and fitting them all onto the shaft. Moreover, when it connects with the stopper holding part side surface, it becomes a stopper which can perform discharge adjustment which also played the role of the original stopper by aligning and fitting a cylinder part.

  When there is a case where it is desired to fix the nozzle head again without adjusting the discharge, it can be used as it is without being lost by fitting it to the side surface of the nozzle head when the stopper is removed from the shaft.

  When neither discharge adjustment nor nozzle head fixing is required, the stopper for fixing the nozzle head for shipping becomes unnecessary as before.

  Another embodiment will be described with reference to FIG.

A spiral groove is provided in the inner diameter of the stopper for fixing the nozzle head of the discharge container of the type shown in FIG. 2, and the stopper is turned after being fitted so as to match the spiral groove provided on the side surface of the nozzle head. In this way, it becomes a quantitative variable discharge container instead of an adjustment tool that moves the nozzle head side surface up and down.

  Also, a plurality of grooves and recesses are provided in a ring shape inside the stopper, and the stopper is fitted over the nozzle head and the shaft by providing spirals and protrusions that match the grooves on the outer peripheral side of the lower surface of the nozzle head. As a result, it is integrated with the nozzle head and fixed without shifting up and down, and when the nozzle head is pushed down, it becomes a quantitative variable discharge container by the fitting position of the stopper.

  DESCRIPTION OF SYMBOLS 1, Nozzle head 2, Storage screw 3, Push-down axis | shaft 4, Dispenser fixing member 5, Cap 6, Container 7, Pump part 8, Convex-shaped cap 9, Depressible range 10, Stopper 11, Divided stopper 12, Connectability Stopper 13 provided with a grip, connectivity on the side surface of the gripping part 14, convex part 15 on the outer peripheral side surface of the nozzle head, stopper storage part 16, slit 17, gripping part 18, gripping part side surface 19, dividing means 20, dividing ratio 21. Stopper with adjustable discharge

Claims (10)

In the pump dispenser of the discharge container in which the chemical liquid corresponding to the amount pushed down is distributed from the discharge port when the nozzle head (1) is pushed down,
The stopper (10) that is fitted to prevent the nozzle head from being pushed down at the time of shipment is provided with a function to physically adjust the nozzle head push-down possible range (9) so that the discharge amount can be adjusted. A quantitative variable discharge container with a stopper (21) capable of adjusting discharge is provided. Specifically, the function that can be adjusted includes a dividing means (19) such as a plurality of lateral grooves and spiral grooves formed in the stopper inner diameter, a partial concave portion, and a partial cut. The stopper that can adjust the discharge is characterized by
(A) It is easy to fit in the part which a nozzle head moves up and down, and to remove easily.
(B) When fitted, the nozzle head is fixed and does not move even if the nozzle head is pressed. (A) and (B) are performed within a range not departing from the two original purposes.   The stopper capable of adjusting the discharge is characterized by providing a dividing means such as a groove or a partial cut so that it can be divided into a plurality of ring shapes. 2. The range which can be easily divided by using a cutting means such as scissors when (A) and (B) according to claim 1 are not achieved. A quantitative variable discharge container with a stopper capable of adjusting discharge according to claim 1 is provided. The best shape of the stopper is (A) (B) according to claim 1, wherein only the side surface (18) of the stopper gripping portion (17) has connectivity (13) and is divided into a ring shape. It is a stopper capable of adjusting the discharge satisfying the purpose.   In order to make it easy to understand the stopper division where discharge adjustment is possible, it is characterized by having dividing means equally, and the user divides and removes the stopper of the height that he wants to push down, By fitting the remaining stoppers within the range that can be pushed down again and pushing down the nozzle head, the vertical movement of the nozzle head is limited, and the required amount of discharge liquid can be obtained. The fixed amount with a stopper capable of adjusting discharge according to claim 1 or 2, wherein the stopper capable of performing discharge adjustment has no problem even if two or more stoppers are fitted to the shaft. A variable discharge container is provided.   In order to maintain strength, the stopper capable of adjusting the discharge is to reduce the number of dividing means as much as possible and increase the discharge stage. The dividing ratio can be set to 1: 2, 1: 1, 2, or 1: 2. 2 or 1 to 3 to 2 or 1 to 2 to 4 or 1 to 3 to 2 to 2 or 1 to 3 to 3 to 2 For example, when dividing means are provided at a dividing ratio of 1: 3: 3: 2, three ring-shaped divided portions are provided for one stopper, and up to nine adjustments can be made by dividing up to two locations. It becomes possible. Provided is a quantitative variable discharge container fitted with a stopper that enables discharge adjustment using the dividing method described above. In that case, the side of the stopper provided with the dividing means shows the number of the dividing ratio, and for easier understanding, the ratio that can be combined with the dividing ratio corresponds to the stopper and corresponds to the circle according to the height It is better to make it easy to determine the division position by displaying (20) within the range of the height of the necessary member, for example, if a number to be entered is entered. Even if all are divided, the total number of division contrasts can be adjusted in stages. 3. The discharge adjustment according to claim 1, wherein the divided discharge adjustable stoppers have no problem in pressing down the nozzle head even if two or more stoppers are fitted to the shaft. A quantitative variable discharge container with a stopper is provided.   1 to 2, or 1 to 1 to 2, or 1 to 1 to 3, or 1 to 1 to 1 or 3 or 1 pair so that the user can easily divide and reduce the number of dividing means as much as possible. The total of the division contrast is easily obtained by obtaining the division means at a ratio of 1: 1 to 1: 4, or 1: 1 to 1: 1: 1 to 4, or 1: 1 to 1: 1: 1 to 5 The number can be adjusted step by step. In that case, it is preferable to make it easy to determine the division position by displaying a ratio number on the side surface of the stopper in an easy-to-understand manner. 3. The discharge adjustment according to claim 1, wherein the divided discharge adjustable stoppers have no problem in pressing down the nozzle head even if two or more stoppers are fitted to the shaft. A quantitative variable discharge container with a stopper is provided.   For stoppers that can be adjusted for discharge, if you want to change the discharge amount frequently, the flat part on the side of the gripping part should be connected, and the stopper part that is unnecessary for discharge adjustment should be temporarily bent to the back side. 6. A stopper with a stopper capable of adjusting the discharge according to any one of claims 1 to 5, which can be used by fitting a stopper portion necessary for the adjustment to the shaft, and can prevent adjustment and loss of the member. A quantitative variable discharge container is provided.   In the discharge container in which the protruding portion of the convex cap (8) of the discharge container is in the nozzle head depressible range, the height of the nozzle head member is equal to the length of the depressible shaft. A ring-shaped convex part (14) with the same length as the C-shaped thickness of the stopper is provided at two places on the lower part of the nozzle head upper surface, and the surface of the concave part formed on the side of the nozzle head is fixed to the nozzle head. The stopper, which is a member attached at the time of shipment, is designed to fit perfectly and does not shift up and down, and this is used as the stopper storage part (15). The stopper slit (16 ) It is characterized by preventing the stopper from being lost by either fitting it so that the part comes or by providing a stopper storage part at the bottom of the discharge port. To provide a dispensing container.   In order to realize the stopper storing method according to claim 7, the shape of the stopper can be viewed from the top without departing from the original purpose of the stopper shown in (A) and (B) of claim 1. By making the nozzle head fixing member into a shape that has a slit for fitting to the shaft from the side to a slightly elliptical hollow column from the C shape, the inner diameter of the stopper can be slightly expanded, so it is naturally contained Provided is a stopper that can be fitted to the outer diameter of a shaft and can be fitted to the outer shape of a nozzle head that is slightly larger than the outer diameter. Further, the stopper storing method according to claim 7 is possible by making the inner diameter of the stopper slightly wider than the outer periphery of the push-down shaft within the intended range described in (A) and (B) of claim 1. Become.   The stopper attached for the purpose of fixing the nozzle head at the time of shipment of the discharge container may not have the shape shown in FIG. 2 (c), but it is basically within the range where the nozzle head can be pushed down. It is characterized by having a portion that wraps around the outer periphery of the push-down shaft. 9. The stopper according to claim 1, further comprising a cutting means that can be divided only into a portion that restricts the pressing down of the outer periphery of the pressing shaft shown in FIG. A quantitative variable discharge container with a stopper as described in 1. is provided. In preparation for fixing the nozzle head again with the discharge container according to claim 7 or 8 or when changing the adjustment amount by dividing the stopper, the divided stopper is temporarily placed on the side surface of the nozzle head. It became possible to fit. However, in this case, since the holding part of the stopper may become an obstacle, the holding part of the stopper should be held within the range where there is no problem in the strength according to any one of claims 1 to 9. The quantitative variable discharge container with a stopper capable of adjusting discharge according to any one of claims 1 to 9, wherein a cutting means for cutting the holding part is provided or a cutting means is provided such as inserting a groove. To do. In this case, when the stopper is provided with connectivity, it may be provided on any one of the C-shaped outer circumferences.

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