JP2017066852A - Discharge device, tank device including discharge device and flush toilet bowl including tank device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge device capable of easily removing an air vent valve.SOLUTION: A discharge device includes: an air chamber provided at a flapper valve 22, and for holding air inside; an air vent valve 58 for removing air in the air chamber; and a pull-up material for opening the flapper valve in a state where the air vent valve is closed, and by rotation in one direction of operation means, and for opening the air vent valve by the rotation in the other direction, and also for opening the flapper valve via the air vent valve. The flapper valve has a cylinder part 56 projecting upward and for accommodating the air vent valve. At the cylinder part, a cover 59 for covering an opening provided at an upper end part of the cylinder part is detachably mounted in a state where the pull-up material is inserted. The cover has a projection part 59a which projects. The cylinder part includes: a first slit in the vertical direction which extends downward from the opening and in which the projection part can be inserted; and a second slit connected with the first slit and extending in the circumferential direction. The projection part is inserted in the second slit.SELECTED DRAWING: Figure 2

Description

  The present invention includes a discharge device that discharges water stored in a tank toward a toilet from a drain port provided at the bottom of the tank, a tank device including the discharge device, and the tank device. It relates to flush toilets.

  As a discharge device, an air chamber is provided in the flapper valve and opened and closed by the air vent valve, so that only one float is required, the space occupied by the float in the tank can be reduced, and the amount of operation to the operation means is small It is known that the intended large washing and small washing can be performed stably without being affected by the above. In this type of discharge device, the flapper valve is directly lifted and opened by rotation in one direction of the operating means provided in the tank, and the flapper valve is lifted and opened via the air vent valve by rotation in the other direction. Further, the flapper valve has a cylindrical wall protruding upward, and a guide portion for closing the opening at the upper end of the cylindrical wall in a state where the air vent valve is accommodated in the cylindrical wall is attached.

  Further, as the discharge device described above, the guide portion is provided with a locking claw, a locking hole corresponding to the locking claw is provided in the cylindrical wall, and the lower side of the guide portion is fitted into the cylindrical wall. The thing attached to the cylinder wall is known by fitting in a state and making a latching claw latch to a latching hole (for example, refer to patent documents 1).

JP 2012-162924 A

  In the conventional discharge device described above, the seal member of the air vent valve may require maintenance or replacement due to deterioration due to wear, for example. During maintenance, etc., it is necessary to remove the locking claw from the locking hole by deforming the locking claw inward. Depending on the material of the locking claw, the locking claw may be deformed to come out of the locking hole. It cannot be removed and cannot be removed. In addition, even when the locking claw can be deformed so as to come out of the locking hole, there is a concern that the deformation of the locking claw may be deteriorated or broken, and the malfunction of the discharge device may be caused by repeating the deformation.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a discharge device in which an air vent valve can be easily removed.

  The present invention is a discharge device for discharging water stored in a tank toward a toilet from a drain port provided at the bottom of the tank, the flapper valve opening and closing the drain port, and the flapper valve An air chamber that holds air inside, an air vent valve that opens by an upward pulling force and draws air from the air chamber and allows water in the tank to flow in, and is provided inside the tank. And the operation means attached to the operation means. The flapper valve is lifted and opened in a state where the air vent valve is closed by rotation of the operation means in one direction, and the air vent valve is rotated by rotation in the other direction. And a lifter that lifts and opens the flapper valve via the air vent valve, and a float attached to the lifter, the flapper valve protruding upward And a cylinder part that accommodates the air vent valve, and a cover that covers an opening provided at an upper end of the cylinder part in a state where the pulling material is inserted is detachably attached to the cylinder part, The cover has a projecting portion projecting sideways, and the cylindrical portion extends downward from the opening at the upper end portion, and a first slit in a vertical direction in which the projecting portion can be inserted, and the first slit And a second slit extending in the circumferential direction, and the protrusion is inserted into the second slit.

  In the present invention configured as described above, the cover has a protruding portion that protrudes toward the side, and the cylindrical portion extends downward from the opening of the upper end portion and can be inserted into the protruding portion in the vertical direction. One slit and a second slit connected to the first slit and extending in the circumferential direction, and a protrusion is inserted into the second slit. Therefore, the cover can be easily removed without causing a great deformation, and the air vent valve can be easily maintained and replaced.

  The present invention may further include a plurality of the protrusions, the first slits, and the second slits.

  In this invention comprised in this way, when it is not necessary to remove a cover, the state where the cover was attached can be hold | maintained more reliably.

  The present invention may be configured such that the plurality of protrusions are arranged with a predetermined pitch along a circumferential direction of the cover.

  In this invention comprised in this way, when it is not necessary to remove a cover, the state where the cover was attached can be hold | maintained more reliably.

  Moreover, you may comprise this invention as a tank apparatus provided with the said discharge device and the said tank.

  In the present invention configured as described above, a tank device is provided that includes a discharge device that can be easily removed without causing significant deformation of the cover and that can easily perform maintenance and replacement of the air vent valve. be able to.

  Moreover, you may comprise this invention as a flush toilet provided with the said tank apparatus.

  In the present invention configured as described above, a tank device having a discharge device that can be easily removed without causing great deformation of the cover and that can easily perform maintenance and replacement of the air vent valve is provided. A flush toilet can be provided.

  Further, the present invention is a discharge device for discharging water stored in a tank from a drain outlet provided at the bottom of the tank toward a toilet, and a flapper valve that opens and closes the drain outlet; An air chamber that is provided in the flapper valve and retains air therein; an air vent valve that opens by the upward pulling force to draw air in the air chamber and allow water in the tank to flow; and an interior of the tank An operation means provided on the operation means, and the flapper valve is lifted and opened in a state where the air vent valve is closed by rotation of the operation means in one direction, and the rotation is performed in the other direction. A pull-up material that opens the air vent valve and raises the flapper valve through the air vent valve, and a float attached to the pull-up material. A cylindrical portion that protrudes and accommodates the air vent valve is detachably attached to the cylindrical portion so as to cover an opening provided at an upper end portion of the cylindrical portion in a state where the pulling material is inserted. The cylindrical portion has a protruding portion that protrudes laterally, and the cover extends upward from an opening at a lower end portion, and a first slit in a vertical direction in which the protruding portion can be inserted, and the first slit And a second slit extending in the circumferential direction, and the protrusion is inserted into the second slit.

  In the present invention configured as described above, the cylindrical portion has a protruding portion that protrudes toward the side, and the cover extends downward from the opening of the upper end portion, and the first portion in the vertical direction in which the protruding portion can be inserted. One slit and a second slit connected to the first slit and extending in the circumferential direction, and a protrusion is inserted into the second slit. Therefore, the cover can be easily removed without causing a great deformation, and the air vent valve can be easily maintained and replaced.

  According to the discharge device of the present invention, the air vent valve can be easily removed.

Sectional drawing which shows the inside of the tank provided with the discharge device by one Embodiment of this invention. The exploded view which shows a part of discharge apparatus by one Embodiment of this invention. The perspective view which shows a part of FIG. IV-IV sectional drawing of FIG. 1 is a partial side cross-sectional view showing a tank device provided with a discharge device according to an embodiment of the present invention, and a flush toilet equipped with the tank device. The disassembled perspective view which shows the modification of the discharge device by one Embodiment of this invention.

Hereinafter, a discharge device according to an embodiment of the present invention will be described with reference to the drawings.
First, the structure of the discharge device according to an embodiment of the present invention will be described with reference to FIGS. 1 is a cross-sectional view showing the inside of a tank provided with a discharge device according to an embodiment of the present invention, and FIG. 2 is an exploded view showing a part of the discharge device according to an embodiment of the present invention. FIG. 3 is a perspective view showing a part of FIG. 2.
As shown in FIG. 1, a discharge device 1 according to an embodiment of the present invention discharges water stored in a tank 10 from a drain port 20 provided at the bottom of the tank 10. A flapper valve 22 for opening and closing the mouth 20 is provided. Further, an overflow pipe 24 communicating with the drain port 20 is erected inside the tank 10, and a substantially L-shaped lever arm 92 (operation means) extending into the tank 10 is provided.

  As shown in FIGS. 2 and 3, the flapper valve 22 includes a disk-shaped valve portion 28, a pair of arms 30 extending from the valve portion 28, and a cylindrical tube wall 56 protruding upward from the valve portion 28. (Cylinder part). The valve member 28 is attached with a seal member 26 that seals the drain port 20 when the valve is closed. The arm 30 is formed in a hook shape, and the flapper valve 22 is pivotally supported at the lower portion of the overflow pipe 24 so as to be pivotable in the vertical direction, and the drain port 20 is opened and closed by pivoting in the vertical direction. Do.

  In addition, an air chamber 48 for forming an air chamber 50 for holding air therein is provided below the valve portion 28 of the flapper valve 22. The air chamber 48 is formed in a tapered shape in which the cross-sectional area at the lower end is smaller than the upper end, that is, a shape in which a hollow cone is connected to a cylinder, and an opening is provided at the lower end.

  An opening 57 is provided at the lower end inside the cylindrical wall 56 and communicates with the air chamber 50 through the opening 57. A cover member 59 (cover) that covers the opening 55 is detachably inserted into the opening 55 provided at the upper end. An air vent valve 58 that opens and closes the opening 57 is accommodated inside the cylindrical wall 56 so as to be slidable in the vertical direction. Furthermore, the cylindrical wall 56 is provided with a water inlet 72 that communicates the inside and the outside.

  The air vent valve 58 is provided integrally with the cover member 59, and is opened by the upward pulling force in a state where the cover member 59 is inserted into the opening 55, and the air in the air chamber 50 is vented. Water is caused to flow into the air chamber 50, and includes a disk-shaped valve portion 64 and a coil spring 60. The valve member 64 is attached with a seal member 62 that seals the opening 57 when the valve is closed. The coil spring 60 urges the air vent valve 58 in the direction in which the seal member 62 seals the opening 57, that is, in the direction in which the air vent valve 58 is closed.

  As shown in FIG. 1, the lever arm 92 is provided in the tank 10, the base end portion of the lever arm 92 is connected to a cleaning handle 94 operated by a user, and the lever arm 92 rotates in accordance with the operation of the cleaning handle 94. A base end portion of a large cleaning ball chain 36 (lifting material) and a small cleaning ball chain 70 (lifting material) are attached to the distal end portion of the lever arm 92. The tip of the large washing ball chain 36 is attached to the valve portion 28, and the tip of the small washing ball chain 70 is attached to the air vent valve 58. Further, the large cleaning ball chain 36 and the small cleaning ball chain 70 are lifted upward by the rotation of the lever arm 92 in one direction, and the small washing ball chain 70 is rotated by rotating in the other direction. The ball chain 70 is configured to be pulled upward.

  Note that the force necessary to open the air vent valve 58 upward against the biasing force of the coil spring 60 opens the flapper valve 22 in the closed state against the pressure of the washing water in the tank 10. It is set smaller than the force required to lift and open the valve. Therefore, when the small washing ball chain 70 is pulled up, the air vent valve 58 is pulled up and opened, and the flapper valve 22 is pulled up through the opening of the air vent valve 58.

  Further, as shown in FIG. 1, a float 84 and a stopper 90 are attached to the ball chain 70 for small washing. The float 84 holds air therein and includes an insertion hole (not shown) at the center. A small cleaning ball chain 70 is inserted through an insertion hole (not shown), and is attached to be movable in the vertical direction. The stopper 90 is a plate-like member whose position can be adjusted up and down, and a ball chain 70 for small cleaning is inserted therethrough.

  With such a configuration, rotation of the lever arm 92 in one direction causes the large washing ball chain 36 to open the flapper valve 22 with the air vent valve 58 closed, thereby opening the flap arm 22 in the other direction. , The air vent valve 58 is opened and the flapper valve 22 is lifted and opened via the air vent valve 58. As a result, when the air vent valve 58 is in a closed state and air is accumulated in the air chamber 50, the flapper valve 22 is largely washed by opening and closing, that is, the flush water is relatively directed toward the toilet. The operation for large cleaning that discharges a lot is performed. On the other hand, when the air vent valve 58 is lifted and opened, the cleaning water flows into the cylindrical wall 56 from the water inlet 72 and further enters the air chamber 50 through the opening 57, and the air chamber 50 is filled with water. 22 performs the operation | movement for small washing | cleaning, ie, the small washing | cleaning which discharges a small amount of washing water toward a toilet rather than large washing.

Specifically, in the operation for large washing, when the washing handle 94 is rotated to the large washing side, the large washing ball chain 36 is lifted by a certain distance, and the flapper valve 22 is directly moved by the ball chain 36. It is lifted and opened. The flapper valve 22 that has been opened is prevented from further rotation by a stopper (not shown), and the valve open state is maintained by the buoyancy caused by the float 84 in a state of being submerged in water and the buoyancy caused by the air chamber 48. By maintaining the valve open state, the wash water in the tank 10 is discharged from the drain port 20.
As the wash water in the tank 10 is discharged, the water level in the tank decreases, and when it falls to a position below the predetermined distance from the upper end of the float 84, the buoyancy acting on the float 84 and the float 84 itself. Thus, the float 84 moves downward along the ball chain 70 for small washing as the water level drops. At this time, since the air chamber 50 in the air chamber 48 is filled with air and buoyancy acts on the air chamber 48, the flapper valve 22 is still held open.
The float 84 moves away from the stopper 90 along the small cleaning ball chain 70 and comes into contact with the cover member 59, whereby the force by which the float 84 pushes the cover member 59 downward increases. When this force overcomes the buoyancy with respect to the air chamber 48, the flapper valve 22 is closed, and the discharge of the washing water from the drain port 20 is stopped.

On the other hand, in the operation for small washing, when the washing handle 94 is rotated to the small washing side (the opposite side to the large washing side), the small washing ball chain 70 is pulled up by a certain distance, and the flapper valve 22 is moved. With the valve closed, the air vent valve 58 is lifted upward against the biasing force of the coil spring 60 and opened. By opening the air vent valve 58, the opening 57 at the upper end of the air chamber 50 is opened, and water in the tank 10 flows into the air chamber 50 through the water inlet 72 to fill the air chamber 50 with water. When the air vent valve 58 comes into contact with the cover member 59, the pulling force by the small washing ball chain 70 reaches the flapper valve 22 to which the cover member 59 is attached, and the flapper valve 22 is opened. At this time, the flapper valve 22 is moved upward relative to the air vent valve 58 by the urging force of the coil spring 60, so that the air vent valve 58 is closed. When the flapper valve 22 is opened, the cleaning water in the tank 10 is discharged from the drain port 20.
As the washing water in the tank 10 is discharged, the water level in the tank decreases, and the buoyancy with respect to the float 84 and the force applied downward to the float 84 are balanced. The flapper valve 22 gradually descends and closes accordingly. Since the buoyancy is not acting on the air chamber 48, the float 84 remains in a state where it hits the stopper 90, that is, maintains a state where a certain distance from the cover member 59 is maintained. It moves downward as it falls. Therefore, at the time of this small cleaning, the time from the opening of the flapper valve 22 to the start of valve closing is shorter than that at the time of large cleaning.

Next, a cover mounting structure according to an embodiment of the present invention will be described with reference to FIGS. 4 is a cross-sectional view taken along the line IV-IV in FIG.
As shown in FIGS. 2 and 3, the cover member 59 has a protruding portion 59 a that protrudes sideways on the outer peripheral wall thereof. Further, the cylindrical wall 56 has a first slit 56a extending downward from the opening 55 and a second slit 56b extending in the circumferential direction from the lower end of the first slit 56a on the inner peripheral wall thereof.

  The projecting portions 59a project outward from the outer surface of the cover member 59, and two projecting portions 59a are provided. The protrusion 59a is formed in a band shape in which the size in the circumferential direction of the cover member 59 is larger than the size in the vertical direction, and one end in the circumferential direction is arcuate and the other end is linear in a side view. Further, the two projecting portions 59 a are arranged so as to be symmetrical with respect to the central axis in the longitudinal direction of the cover member 59. In other words, the two protrusions 59 a are arranged with a predetermined pitch along the circumferential direction of the cover member 59. The first slit 56a is recessed toward the side of the cylindrical wall 56 (from the inner surface to the outer surface), and has two widths in the circumferential direction that are larger than the circumferential size of the protruding portion 59a. . In addition, the second slit 56b is recessed from the inner surface to the outer surface of the cylindrical wall 56, and has two widths in the circumferential direction that are larger than the vertical size of the protruding portion 59a.

  With such a configuration, when the cover member 59 (that is, the integrated air vent valve 58) is inserted into the cylindrical wall 56, the protrusion 59a is inserted downward from the upper end of the first slit 56a, and then protrudes. The portion 59a is further inserted into the second slit 56b, and the cover member 59 is rotated. Therefore, when removing the cover member 59 from the cylindrical wall 56, it is necessary to rotate it once in the circumferential direction, and it cannot be removed only by movement in the vertical direction.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to FIG. FIG. 5 is a partial side sectional view showing a tank apparatus provided with a discharge device according to an embodiment of the present invention and a flush toilet equipped with the tank apparatus.
As shown in FIG. 5, a flush toilet 200 according to an embodiment of the present invention is a so-called siphon flush toilet that flushes filth by siphon action, and is made of earthenware placed on the floor F. A toilet body 2 is provided, a bowl portion 4 is formed on the front side of the upper portion of the toilet body 2, and a drain trap pipe 8 communicating with the bowl portion 4 is formed below the center rear side of the toilet body 2. Yes. In addition, a water discharge portion 11 that discharges cleaning water toward the inside of the bowl portion 4 and cleans the surface of the bowl portion 4 is provided at an upper portion of the bowl portion 4. Furthermore, a drain socket 9 is provided at the downstream end of the drain trap pipe 8 to communicate the downstream end of the drain trap pipe 8 and an underfloor drain pipe 12 provided in the building frame.

Further, the flush toilet 200 according to the present embodiment includes a tank device 100 having a tank 10 that stores wash water supplied from a wash water source S through a water supply valve 5. The tank device 100 further includes a discharge device 1.
In the present embodiment, the cleaning water is supplied from the drain port 20 to the water discharger 11 by operating the cleaning handle 94, but the present invention is not limited to such a form. The washing water may be supplied to the water discharger by an operation on the switch or another user washing operation such as user detection by a human body detection sensor.

  According to the discharge device 1 according to the embodiment of the present invention described above, the cover member 59 has a protruding portion 59a protruding outward on its outer surface, and the cylindrical wall 56 has an upper end portion on its inner surface. The first slit 56a in the vertical direction can be inserted from the opening 55 and can be inserted into the protrusion 59a, and the second slit 56b is connected to the first slit 56a and extends in the circumferential direction, and protrudes into the second slit 56b. The part 59a is inserted. Therefore, the cover member 59 can be easily removed without causing great deformation, and the maintenance and replacement of the seal member 62 and the like of the air vent valve 58 can be easily performed.

  Furthermore, according to the discharge device 1 according to the embodiment of the present invention described above, the protrusion 59a, the first slit 56a, and the second slit 56b are provided two by two, and it is not necessary to remove the cover member 59. Thus, it is possible to hold the state where the cover member 59 is attached more reliably.

  Further, according to the discharge device 1 according to the embodiment of the present invention described above, the protrusions 59a are arranged with a predetermined pitch along the circumferential direction of the cover member 59. Therefore, when it is not necessary to remove the cover member 59, the state in which the cover member 59 is attached can be held more reliably.

In the present embodiment, two protrusions 59a are provided, but the present invention is not limited to such a form. For example, only one protrusion may be provided, or three or more may be provided. Further, the number of the first slits and the second slits only needs to correspond to the number of the protruding portions. If the number of the protruding portions is one, one may be provided, and if the number of the protruding portions is three or more, three may be provided. Good.
Further, the two projecting portions 59a are arranged so as to be symmetrical with respect to the central axis in the longitudinal direction of the cover member 59, but the present invention is not limited to such a form. For example, two protrusions may be provided at positions that are not symmetrical across the central axis of the cover member 59 in the longitudinal direction, and three or more protrusions are arranged at a predetermined pitch along the circumferential direction of the cover member. May be.

In the present embodiment, the protruding portion 59a is provided on the outer surface of the cover member 59, and the first slit 56a and the second slit 56b are provided on the inner surface of the cylindrical wall. However, the present invention is limited to such a form. For example, the protruding portion 59a may be provided on the inner surface of the cover member 59, and the first slit 56a and the second slit 56b may be provided on the outer surface of the cylindrical wall. Moreover, it is good also as a structure which provides a protrusion part in the outer surface or inner surface of a cylinder wall, and provides a 1st slit and a 2nd slit in the inner surface or outer surface of a cover. For example, a modified example of the discharge device according to the embodiment of the present invention will be described with reference to FIG. FIG. 6 is an exploded perspective view showing a modified example of the discharge device according to the embodiment of the present invention. Only the differences from the above-described embodiment of the present invention will be described.
As shown in FIG. 6, in this modification, two protrusions 256 a are provided on the inner surface of the cylindrical wall 256, and the first slit 259 a and the second slit 259 b are provided on the outer surface of the cover member 259.
According to the above-described modification of the embodiment of the present invention, the cover member 259 can be easily removed without causing significant deformation, and the maintenance and replacement of the seal member 62 and the like of the air vent valve 58 can be easily performed. Can do.

DESCRIPTION OF SYMBOLS 1 Discharge device 2 Toilet body 4 Bowl part 5 Water supply valve 8 Drain trap pipe 9 Drain socket 10 Tank 11 Water discharge part 12 Underfloor drain pipe 20 Drain port 22 Flapper valve 24 Overflow pipe 26 Seal member 28 Valve part 30 Arm 36 For large washing Ball chain (lifting material)
48 Air chamber 50 Air chamber 55 Opening 56 Cylinder wall (cylinder part)
56a First slit 56b Second slit 57 Opening 58 Air vent valve 59 Cover member (cover)
59a Protruding part 60 Coil spring 62 Seal member 64 Valve part 70 Ball chain for small cleaning (lifting material)
72 Water inlet 84 Float 90 Stopper 92 Lever arm (operating means)
94 Washing handle 100 Tank device 200 Flush toilet 256 Tube wall 256a Protruding portion 259 Cover member 259a First slit 259b Second slit

Claims (6)

A discharge device for discharging water stored in the tank toward a toilet from a drain outlet provided at the bottom of the tank,
A flapper valve that opens and closes the drain;
An air chamber provided in the flapper valve and holding air therein;
An air release valve that opens with the pulling force upward, and draws out air from the air chamber to allow water in the tank to flow;
Operating means provided inside the tank;
It is attached to the operating means, and the flapper valve is lifted and opened in a state where the air vent valve is closed by rotation in one direction of the operating means, and the air vent valve is opened by rotation in the other direction. A pulling material that pulls up and opens the flapper valve via an air vent valve;
A float attached to the pulling material;
With
The flapper valve has a cylindrical portion that protrudes upward and accommodates the air vent valve,
A cover that covers an opening provided in an upper end portion of the cylindrical portion in a state where the pulling material is inserted is detachably attached to the cylindrical portion,
The cover has a protruding portion protruding sideways,
The cylindrical portion has a first slit in the vertical direction that extends downward from the opening of the upper end portion and can insert the protrusion, and a second slit that is connected to the first slit and extends in the circumferential direction, A discharge device in which the protrusion is inserted into the second slit.   The discharge device according to claim 1, wherein a plurality of the protrusions, the first slits, and the second slits are provided.   The discharge device according to claim 2, wherein the plurality of protrusions are arranged with a predetermined pitch along a circumferential direction of the cover.   A tank device comprising: the discharge device according to any one of claims 1 to 3; and the tank.   A flush toilet provided with the tank device according to claim 4. A discharge device for discharging water stored in the tank toward a toilet from a drain outlet provided at the bottom of the tank,
A flapper valve that opens and closes the drain;
An air chamber provided in the flapper valve and holding air therein;
An air release valve that opens with the pulling force upward, and draws out air from the air chamber to allow water in the tank to flow;
Operating means provided inside the tank;
It is attached to the operating means, and the flapper valve is lifted and opened in a state where the air vent valve is closed by rotation in one direction of the operating means, and the air vent valve is opened by rotation in the other direction. A pulling material that pulls up and opens the flapper valve via an air vent valve;
A float attached to the pulling material;
With
The flapper valve has a cylindrical portion that protrudes upward and accommodates the air vent valve,
A cover that covers an opening provided in an upper end portion of the cylindrical portion in a state where the pulling material is inserted is detachably attached to the cylindrical portion,
The cylindrical portion has a protruding portion protruding toward the side,
The cover includes a first slit in a vertical direction that extends upward from an opening of a lower end portion and can insert the protrusion, and a second slit that is connected to the first slit and extends in the circumferential direction. A discharge device in which the protrusion is inserted into two slits.

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