JP4522114B2 - Wet tissue container - Google Patents

Description

  The present invention relates to a wet tissue container for storing a wet tissue, and more particularly to a wet tissue container that can be carried in a compact size.

Conventional technology

  Conventionally, as a wet tissue container for storing a wet tissue, a container having a container body having an opening and a cap covering the opening is known. Such a wet tissue container is used by being placed on a toilet or a desk. In use, a cap covering the opening is opened, and wet tissues stacked in the container body are pulled out one by one from the opening. Also, many of those known as portable wet tissues are housed in pillow bags made of plastic film, and plastic film pigs that are covered with re-adhesiveness are attached.

  As described above, some wet tissue containers have a container body having an opening and a cap that covers the opening. In addition, the wet tissue container as a whole has a size that can be placed on a tray or a desk, and specifically has a size that is about the size of a book. In such a case, there is a pillow bag type wet tissue container that can hold the wet tissue container with one hand. However, in the pillow bag type wet tissue container, the re-adhesiveness of the plastic film pig is lowered and sealed. There may be problems with the sexiness, and there may be a lack of luxury.

  The present invention has been made in consideration of such points, and an object thereof is to provide a wet tissue container that is convenient to carry, has excellent sealing properties, and has a high-class feeling.

The present invention is a wet tissue container that can store wet tissue and is gripped with one hand by a user.In the wet tissue container, the wet tissue is stored between the lower part and the lower part, and the upper part having an opening;
It is a wet tissue container characterized by comprising an upper opening and a cap that is provided so as to be swingable.

  According to the present invention, an elastic member for opening the cap is provided in the swinging portion of the cap in the upper opening, and the free end of the cap is locked to the free end of the cap in the upper opening. A wet tissue container characterized in that a body is provided.

  The present invention is the wet tissue container characterized in that the operating body is slidable with respect to the upper portion.

  The present invention is a wet tissue container characterized in that when the operating body is pressed, the operating body descends with respect to the upper portion.

  The present invention is the wet tissue container, wherein the operating body is provided integrally with the upper portion.

  The present invention is the wet tissue container characterized in that the operating body is provided separately from the upper part.

  The present invention is the wet tissue container, wherein the elastic member is a coil spring.

  The present invention is the wet tissue container, wherein the elastic member is made of a leaf spring.

  The present invention is the wet tissue container, wherein the operating body is attached to an upper portion via a spring.

  The present invention is a wet tissue container in which an operating body and a spring are integrally formed.

  The present invention is the wet tissue container characterized in that the elastic member is accommodated in the cap, and the cap is provided with a restriction projection for restricting the elastic member.

  According to the present invention, the operating body has a pair of slide ribs engaged with the upper portion on the back surface thereof, and a spring that is locked to the upper portion is provided between the pair of slide ribs. It is a tissue container.

  The present invention is a wet tissue container characterized in that a predetermined gap is formed between a back surface of a working body and a spring.

  The present invention is the wet tissue container characterized in that the back surface of the pair of slide ribs and the back surface of the spring are located on substantially the same plane.

  The present invention is a wet tissue container in which each slide rib of an operating body is slidably engaged with a slide groove provided in an upper portion.

  The present invention is a wet tissue container in which a reinforcing rib extends between a pair of slide ribs.

  The present invention is the wet tissue container, wherein the spring includes a pair of S-shaped portions.

  The present invention is a wet tissue container characterized in that a stopper that is fitted into a stopper hole provided in an upper portion is provided at a substantially central portion of a spring.

  The present invention is the wet tissue container characterized in that the working body is disposed in the working body recess that falls from the upper end surface of the upper part.

  The present invention is a wet tissue container characterized in that a peripheral rib is provided on the opening periphery of the upper portion, and the back surface of the concave portion for the working body and the back surface of the peripheral rib of the upper portion are located on substantially the same plane. .

  The present invention is a wet tissue container characterized in that each slide rib is provided with a sliding projection that slides on the surface of the concave portion for the working body.

  The present invention is the wet tissue container, wherein each slide rib of the operating body is slidably engaged with a slide groove provided in a side wall of the recess for the operating body.

  The present invention is a wet tissue container characterized in that a stopper that is fitted into a stopper hole provided in the surface of the working body recess is provided at a substantially central portion of the spring.

  The present invention is the wet tissue container characterized in that the upper part is rotatably attached to one side end part of the lower part at one side end part thereof.

  The present invention is the wet tissue container characterized in that the operating body is provided on the opposite side to the vibration axis of the cap in the upper part.

  The present invention is a wet tissue container characterized in that a concave portion on which a user's thumb hits is provided on the surface of an operating body.

  The present invention is a wet tissue container characterized in that a holding rib for holding a sealed bag containing a wet tissue is provided in a lower part.

  As described above, according to the present invention, it is possible to provide a wet tissue container that can be grasped with one hand, has excellent operability, has excellent sealing properties, is convenient to carry, and has a high-class feeling.

BEST MODE FOR CARRYING OUT THE INVENTION

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 12 are views showing an embodiment of a wet tissue container according to the present invention. As shown in FIGS. 1 to 12, the wet tissue container 10 has an upper opening periphery and a lower portion 11 having a space inside, and an upper portion having a lower opening periphery and having a space inside. The overall length is about 12 cm, the width is about 10 cm, and the height is about 4 cm, so that the user can hold it with one hand.

  An opening 13 is formed in the upper portion 12, and the opening 13 is covered with a cap 15 that is swingably provided in the upper portion 12.

  Among these, the lower part 11, the upper part 12, and the cap 15 are all made of polypropylene. In addition, polyethylene, ABS, polystyrene, polycarbonate, or the like can be used as the material of the lower portion 11, the upper portion 12, and the cap 15.

  In addition, the wet tissue 1 sealed by the sealing bag 2 is accommodated in the internal space formed by the lower part 11 and the upper part 12. Many wet tissues 1 are laminated.

  Next, the lower part 11 and the upper part 12 will be further described.

  The lower part 11 is provided with holding ribs 17 and 17 for holding the sealed bag 2 in which the wet tissue 1 is stored, and a rotating shaft 11 a is provided on one side of the lower part 11. The upper portion 12 has an engaging portion 12a that engages with the rotating shaft 11a of the lower portion 11, and the upper portion 12 rotates about the rotating shaft 11a of the lower portion 11 and the engaging portion 12a of the upper portion 12. It has become.

  Further, an engaging projection 11b is provided on the other side of the lower portion 11, and the upper portion 12 has a locking projection 12b that is locked to the engaging projection 11b.

  For this reason, when the wet tissue 1 is lost and the sealing bag 2 is replaced, a finger is put on the opening rib 26 a of the upper portion 12, and the upper portion 12 is held while holding the catching rib 26 protruding from the side portion of the lower portion 11. Is rotated to open the lower part 11 and the sealing bag 2 is replaced. Thereafter, the upper portion 12 is closed, and the locking protrusion 12b is locked to the engaging protrusion 11b.

  In this case, since the catching rib 26 is non-slip, the upper portion 12 and the lower portion 11 can be easily opened, and the sealing bag 2 can be easily refilled.

  12 (a) and 12 (b), the rotating shaft 11a of the lower part 11 is provided with a fan-shaped peripheral protrusion 46 (FIG. 12 (b)), and the other engaging part of the upper part 12 is provided. A fitting groove 45 into which the rotary shaft 11a is fitted is formed in 12a. The fitting groove 47 of the engaging portion 12a is provided with a protrusion 47a that engages with the peripheral protrusion 46 of the rotating shaft 11a.

  Therefore, when the upper portion 12 is rotated with respect to the lower portion 11 around the rotation shaft 11 a and the engagement portion 12 a as the center, the peripheral protrusion 46 of the rotation shaft 11 a is engaged with the protrusion 47 a in the fitting groove 47. In combination, the opening degree of the upper part 12 with respect to the lower part 11 is regulated.

  A holding plate 22 a having an opening 22 is provided on one side of the lower portion 11, and the wet tissue container 10 is held in the opening 22 through a holding string.

  Further, the cap 15 covering the opening 13 of the upper portion 12 is attached to the upper portion 12 so as to be swingable about a pair of swing shafts 21 located on the holding plate 22a side of the lower portion 11. An engaging rib 15 a is provided on the free end side of the cap 15, and a peripheral rib on the cap 15 side that engages with the outer periphery of the peripheral rib 13 a provided on the peripheral edge of the opening 13 of the upper portion 12 on the inner surface of the cap 15. 15b is provided. In this case, a packing may be provided between the peripheral rib 13 a of the upper portion 12 and the peripheral rib 15 b of the cap 15.

  Further, a coil spring (elastic member) 15c for urging the cap 15 in the opening direction is attached around one swing shaft 21 of the cap 15 (FIGS. 6 and 8A, 8B, and 8C). reference). The coil spring 15c has one end 40 fixed to the cap 15 side and the other end 41 fixed to the upper portion 12 side, and normally urges the cap 15 in the opening direction as described above.

  The coil spring 15c is housed in a cover 25 (to be described later) of the cap 15, and a restriction projection 15e for restricting the coil spring 15c from jumping outward is provided on the cover 25 of the cap 15. By providing the restriction protrusion 15e on the cap 15 in this way, the coil spring 15c does not jump out of the cap 15 even if the cap 15 is disengaged from the upper portion 12. For this reason, the coil spring 15c does not jump out and is not damaged by the user.

  The coil spring 15c of the cap 15 is protected by a cover 25 on the cap 15 side (see FIG. 1). In this case, instead of the coil spring 15 c of the cap 15, a synthetic resin (or rubber) leaf spring may be used.

  Next, the structure for attaching the coil spring 15c to the cap 15 will be further described with reference to FIGS. 8A is a perspective view showing the attachment structure of the coil spring 15c, FIG. 8B is an enlarged view of a portion B of FIG. 8A, and FIG. 8C is a side view showing the attachment structure of the coil spring 15c. It is. As shown in FIGS. 8A, 8B, and 8C, the coil spring 15c is attached around the vibration shaft 21 of the cap 15, and as described above, the coil spring 15c is accommodated in the cover 25 on the cap 15 side. Yes. One end 40 of the coil spring 15c is located inside the coil spring 15c, and is locked and fixed to a locking groove 44 extending toward the engagement rib 15a of the cap 15 in the cover 25.

  The cover 25 is provided with an opening 43 adjacent to the restricting projection 15e, and the other end 41 of the coil spring 15c is located outward in the direction of the vibration shaft 21 and extends outward from the opening 43 to the upper portion 12. It is locked and fixed in the locking groove 45 provided.

  In this case, the other end 41 of the coil spring 15c is located outward in the direction of the vibration axis 21 of the coil 15c, extends outward from the opening 43, and is restricted by the restriction protrusion 15e. For this reason, as described above, the coil spring 15c as a whole is restricted from protruding outward by the restricting protrusion 15e.

  Further, on the free end side of the cap 15 in the upper portion 12, an operating body 20 that is engaged with the engagement rib 15 a of the cap 15 is provided slidably with respect to the upper portion 12. As shown in FIGS. 4A and 4B and FIGS. 5A and 5B, the actuating body 20 is provided separately from the upper portion 12, and the user has, for example, a thumb on the surface of the actuating body 20. The concave surface 20a is formed so that can be applied.

  In addition, a pair of slide ribs 20b are provided on the back surface of the operating body 20 to slide into the slide grooves 33 formed in the upper portion 12, and a spring 20d is provided between the pair of slide ribs 20b. A stopper 20c is provided. 4A is a side sectional view showing the operating body 20 and the upper portion 12, FIG. 4B is a side view of the operating body, and FIG. 5A is a perspective view showing the surface of the operating body 20. FIG. 5B is a perspective view showing the back surface of the operating body 20.

  The actuating body 20 is made of polyacetal, polypropylene, polycarbonate or the like, and the spring 20d of the actuating body 20 is made of an elastic band made of polyacetal or polypropylene including a pair of S-shaped portions 50. Further, the stopper 20 c of the operating body 20 is fitted into the stopper hole 27 of the upper portion 12 and is fixed to the upper portion 12.

  In FIG. 4A, when the operating body 20 is moved to the left with the thumb, the operating body 20 is disengaged from the engagement rib 15a of the cap 15, so that the cap 15 is opened by the force of the coil spring 15c. . In this case, when the thumb is released from the operating body 20, the operating body 20 moves to the right by the force of the spring 20d and returns to the original position.

  Further, when the cap 15 is pushed by a finger against the force of the coil spring 15c, the inclined surface 15d of the engagement rib 15a abuts against the operating body 20 and moves the operating body 20 leftward in FIG.

  When the engaging rib 15a comes below the operating body 20, the operating body 20 is again moved rightward by the force of the spring 20d and returned to the original position, and the operating body 20 moves the engaging rib 15a of the cap 15 to the original position. It is designed to be locked.

  Next, the operating body 20 will be further described. As described above, the back surface of the operating body 20 is provided with the pair of slide ribs 20b that slide into the slide groove 33 (see FIG. 7) on the upper portion 12 side, and slides between the pair of slide ribs 20b. A spring 20d made of an elastic band is provided. In this case, each slide rib 20b has a side protrusion 49 fitted into the slide groove 33 on the side thereof. The pair of slide ribs 20b and the spring 20d are both on the back side of the operating body 20 and form a two-layer structure with the operating body 20. For this reason, the slide rib 20b and the spring 20d do not protrude greatly to the side of the operating body 20.

  A predetermined gap 30 is formed between the back surface of the operating body 20 and the spring 20d. Since such a predetermined gap 30 is formed between the spring 20d and the operating body 20, friction does not occur between the spring 20d and the operating body 20 when the spring 20d is acted on, and the spring of the spring 20d There is no hindrance to the action.

  Further, the back surface of the pair of slide ribs 20b and the back surface of the spring 20d are located on substantially the same plane, so that the combined structure of the pair of slide ribs 20b and the spring 20d can be thinned.

  A reinforcing rib 31 extends between the pair of slide ribs 20b provided on the back surface of the operating body 20 to reinforce the structure of the pair of slide ribs 20b. Further, the spring 20d connected to the pair of slide ribs 20b includes the pair of S-shaped portions 50 as described above, and the stopper 20c is provided between the pair of S-shaped portions 50, that is, approximately at the center of the spring 20d.

  By the way, the operating body 20 is disposed in the operating body recess 35 that falls downward from the upper end surface 48 of the upper section 12 in the upper section 12, and slides in the operating body recess 35. The stopper hole 27 into which the stopper 20c of the spring 20d is fitted is formed in the surface of the working body recess 35 (see FIG. 7).

  The slide groove 33 into which the slide rib 20b of the operating body 20 is fitted is formed on the side wall of the working body recess 35, and the operating body 20 is inserted into the slide groove 33 so that the operating body 20 is recessed into the working body recess. 35 is slidably held in the body.

  The slide rib 20b of the operating body 20 is provided with a sliding protrusion 32. When the operating body 20 moves in the horizontal direction in the operating body recess 35, the surface of the sliding protrusion 32 or the operating body recess 35 is provided. Slide on the top. Since the slide protrusions 32 are provided on the slide rib 20b in this manner, the slide rib 20b and the spring 20d can be slightly lifted from the surface of the working body recess 35, and the slide rib 20b can be Point contact can be made on the surface. For this reason, the slide rib 20b of the operating body 20 can be smoothly moved in the operating body recess 35.

  By the way, the back surface 36 of the concave portion 35 for the working body is located on the same plane as the back surface 37 of the peripheral rib 13a provided on the periphery of the opening 13 of the upper portion 12 (FIGS. 4A, 4B, and 11). . Thus, by arranging the back surface 36 of the concave portion 35 for the working body and the back surface 37 of the peripheral rib 13a on the same plane, the entire wet tissue container 10 can be formed compactly.

  That is, it is conceivable that the inner volume of the wet tissue container 10 is reduced when the back surface 36 of the working body recess 35 is lowered from the back surface 37 of the peripheral rib 13a. On the other hand, when the back surface 36 of the working body recess 35 rises from the back surface 37 of the peripheral rib 13a, the working body 20 in the working body recess 35 protrudes outward from the upper portion 12 greatly.

  Therefore, by arranging the back surface 36 of the working body recess 35 and the back surface 37 of the peripheral rib 13a on the same plane, the decrease in the internal volume of the wet tissue container 10 is suppressed and the working body 20 protrudes outward. Can be suppressed.

  Thus, the peripheral rib 11c is provided on the opening periphery of the lower part 11, and the peripheral rib 11c of the lower part 11 engages with the inner rib 12c provided on the inner periphery of the opening of the upper part 12, thereby lowering the lower part. 11 and the upper part 12 are kept sealed. In addition, you may provide a packing between the peripheral rib 11c and the inner rib 12c of the lower part 11, and may improve sealing performance more.

  Next, the storage state of the sealing bag 2 in the lower part 11 will be described with reference to FIGS. The sealing bag 2 contains a wet tissue 1 therein, and the sealing bag 2 has heat sealing portions 3 protruding outward at both ends thereof. The opening of the sealing bag 2 is covered with a peeling cover 4 that is free to peel.

  Holding ribs 17 and 17 for holding the sealing bag 2 so as not to move are provided in the lower portion 11, and the length of the sealing bag 2 corresponds to the distance between the holding ribs 17. Further, the holding rib 17 is disposed on the inner side of the peripheral rib 11c of the lower portion 11 and separated from the peripheral rib 11c by a predetermined distance.

  For this reason, when the sealing bag 2 is stored between the holding ribs 17 and 17, the sealing bag 2 is firmly held between the holding ribs 17 and 17. Therefore, even if the wet tissue container 10 is moved, the sealing bag 2 does not move in the lower portion 11.

  Further, when the sealing bag 2 is stored between the holding ribs 17, 17, the heat seal portion 3 of the sealing bag 2 is also held in the holding rib 17, and the heat seal portion 3 does not protrude from the holding rib 17. For this reason, even when the sealing bag 2 is accommodated between the holding ribs 17 of the lower part 11 and then the upper part 12 is rotated and closed with respect to the lower part 11, the end of the sealing bag 2, in particular, heat sealing. The portion 3 is not sandwiched between the peripheral rib 11 c of the lower portion 11 and the inner rib 12 c of the upper portion 12.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, the locking protrusion 12b of the upper part 12 is removed from the engaging protrusion 11b of the lower part 11, and the upper part 12 is rotated in the opening direction around the rotating shaft 11a and the engaging part 12a. Next, the sealed bag 2 in which the wet tissue 1 is stored is stored in the lower portion 11. At this time, the sealing bag 2 is accommodated in the holding ribs 17, 17 of the lower part 11 so that the sealing bag 2 does not move in the lower part 11.

  Next, the upper portion 12 is rotated in the closing direction about the rotation shaft 11a and the engaging portion 12a, and the engaging protrusion 11b of the lower portion 11 is engaged with the engaging protrusion 12b of the upper portion 12.

  In use, the user holds the entire wet tissue container with one hand. Next, a thumb is put on the concave surface 20a of the operating body 20, and the operating body 20 is moved to the left in FIG. At this time, the engaging rib 15a of the cap 15 is detached from the operating body 20, and the cap 15 is opened by the coil spring 15c.

  In this case, the user can draw out the wet tissues 1 in the sealed bag 2 one by one through the opening 13 of the upper portion 12.

  After the wet tissue 1 is pulled out by a predetermined amount, the user closes the cap 15. At this time, the inclined surface 15d formed on the engagement rib 15a of the cap 15 contacts the operating body 20, and the operating body 20 is expanded by the force of the spring 20d and moved to the left in FIG. When the engagement rib 15a of the cap 15 comes below the operating body 20, the operating body 20 moves again to the right in FIG. 4 by the force of the spring 20d and returns to the original position. The engagement rib 15a is locked.

  As described above, according to the present embodiment, the cap 15 can be opened simply by moving the operating body 20 with the thumb while the user holds the wet tissue container 10 with one hand. For this reason, after opening the cap 15, the wet tissue 1 can be easily pulled out one by one from the opening 13. Therefore, handling of the wet tissue container 10 becomes easy. Furthermore, since the wet tissue container 10 can be reduced in size, the wet tissue container 10 can be easily accommodated in clothes.

  Moreover, since the opening 13 of the upper part 12 is covered and sealed with a swingable cap 15, the sealing performance is deteriorated due to secular change as compared with a pillow bag type wet tissue container in which the opening is covered with a re-adhesive lid. Never do. Moreover, it can give a high-class feeling compared to a pillow bag type wet tissue container.

  In the above embodiment, the working body 20 is provided separately from the upper portion 12 and the working body 20 is slid with respect to the upper portion 12. However, the present invention is not limited to this. The engagement between the engagement rib 15a of the cap 15 and the operating body 20 may be released by pressing against the upper portion 12. When the operating body 20 is configured to be able to be pressed against the upper portion 12 as described above, the operating body 20 may be provided integrally with the upper portion 12, or the operating body 20 may be provided separately from the upper portion 12. Also good.

  Further, the operating body 20 may be provided to the upper portion 12 via a thin portion or a bellows portion. In this case, the operating body 20 can be easily pressed against the upper portion 12. Moreover, you may provide the action body 20 via the soft member with respect to the upper part 12. FIG.

  Moreover, although the example which used the strip | belt-shaped body containing a pair of S-shaped part was shown as the spring 20d which supports the stopper 20c on the back surface of the action body 20, if it has elasticity not only this but spring 20d, Any shape may be used.

The perspective view which shows one Embodiment of the wet tissue container by this invention. The perspective view which shows the wet tissue container with which the cap opened. The sectional side view which shows a wet tissue container. The figure which shows the upper part and action | operation body of a wet tissue container. The figure which shows the action body of a wet tissue container. AA sectional drawing of FIG. The perspective view which shows the upper part of a wet tissue container. The figure which shows the attachment structure of a coil spring. The figure which shows the accommodation state to the lower part of a sealing bag. The figure which shows the accommodation state to the lower part of a sealing bag. The back view which shows the upper part of a wet tissue container. The figure which shows the rotating shaft of a lower part, and the engaging part of an upper part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wet tissue container 11 Lower part 11a Rotating shaft 11b Engagement protrusion 11c Peripheral rib 12 Upper part 12a Engagement part 12b Locking protrusion 12c Inner rib 13 Opening 15 Cap 15a Engagement rib 15b Peripheral rib 15c Coil spring 15d Inclined surface 17 Holding rib 20 Actuator 20a Concave surface 20b Slide rib 20c Stopper 20d Spring 21 Vibration shaft 22 Closed hole 22a Holding plate 25 Cover 26 Hooking rib 26a Open rib 30 Gap 31 Reinforcement rib 32 Sliding projection 33 Slide groove 35 Actuator recess 36 Back 37 Back surface 40 One end 41 of the coil spring 41 Other end 43 of the coil spring Opening 44 Locking groove 45 Locking groove 46 Peripheral protrusion 47 Fitting groove 47a Projection

Claims (12)

In a wet tissue container that can store wet tissue and is held by the user with one hand,
The lower part,
An upper part that stores wet tissue between the lower part and has an opening;
A cap provided so as to be swingable while covering the upper opening,
An elastic member that opens the cap is provided in the swinging portion of the cap in the upper opening, and an operating body that locks the free end of the cap is provided on the free end side of the cap in the upper opening. ,
The operating body is slidable with respect to the upper part,
The actuating body has a pair of slide ribs engaged with the upper part on the back surface thereof, and a spring that is engaged with the upper part between the pair of slide ribs.   The wet tissue container according to claim 1, wherein a predetermined gap is formed between the back surface of the operating body and the spring.   The wet tissue container according to claim 1, wherein the back surface of the pair of slide ribs and the back surface of the spring are located on substantially the same plane.   The wet tissue container according to claim 1, wherein each slide rib of the operating body is slidably engaged with a slide groove provided in an upper portion.   The wet tissue container according to claim 1, wherein a reinforcing rib extends between the pair of slide ribs.   The wet tissue container according to claim 1, wherein the spring includes a pair of S-shaped portions.   The wet tissue container according to claim 1, wherein a stopper fitted into a stopper hole provided in an upper portion is provided at a substantially central portion of the spring.   The wet tissue container according to claim 1, wherein the operating body is disposed in a concave portion for the operating body that falls from an upper end surface of the upper portion.   9. The wet tissue container according to claim 8, wherein a peripheral rib is provided on the opening periphery of the upper portion, and the back surface of the working body recess and the back surface of the upper peripheral rib are positioned on substantially the same plane.   9. The wet tissue container according to claim 8, wherein each slide rib is provided with a sliding projection that slides on the surface of the concave portion for the working body.   9. The wet tissue container according to claim 8, wherein each slide rib of the operating body is slidably engaged with a slide groove provided in a side wall of the recess for the operating body.   The wet tissue container according to claim 8, wherein a stopper fitted in a stopper hole provided in the surface of the working body concave portion is provided at a substantially central portion of the spring.

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