CN218852657U

CN218852657U - Door body structure for dish washing machine and dish washing machine

Info

Publication number: CN218852657U
Application number: CN202222905806.8U
Authority: CN
Inventors: 何小磊; 王式兴
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-04-14
Anticipated expiration: 2032-10-31

Abstract

The utility model relates to a door body structure for a dish washing machine and the dish washing machine, which comprises a first door body; the second door body is positioned on the front side of the first door body and connected with the first door body; the second door body is provided with a containing groove, an electric appliance part is contained in the containing groove, and a notch of the containing groove faces forwards. The utility model discloses the notch of the storage tank that will place electrical components is first door body dorsad, and the notch of storage tank is forward promptly, and the rear side of storage tank is like this encapsulated situation, and first door position in the rear side of the second door body, can prevent like this that water liquid between the first door body and the second door body from entering into the storage tank, erosion electrical components.

Description

Door body structure for dish washing machine and dish washing machine

Technical Field

The utility model relates to a dish washer technical field, concretely relates to a door body structure and dish washer for dish washer.

Background

At present, a door body which can be opened and closed is generally arranged in front of a household dishwasher on the market, and the door body is flattened to form a sliding-out platform of a dishwasher basket. In practical application, the door body is easily covered with water liquid. For example: after the door body is closed, the inner container of the dish-washing machine forms a sealed cavity so as to spray and clean tableware loaded in the inner container, and the door body prevents water liquid from flowing outwards. When the door body is opened, the flattened door body can form a sliding platform of the dish basket of the dish washing machine, the dish basket slides out of the door body, but washed tableware is loaded on the dish basket, and water on the tableware directly drops on the flattened door body. Therefore, no matter which state the door body is in, ponding exists on the door body inevitably.

The common door body of the dishwasher is generally formed by splicing an inner door plate and an outer door plate, and gaps are easy to exist at the splicing parts of the inner door plate and the outer door plate. Because there is ponding easily on the door body, these water liquid will be easily from the inside of the gap infiltration door body between interior door plant and the outer door plant to lead to causing the influence to setting up in the inside electrical components of door body such as control panel, take place to wade the electric accident easily.

In order to solve the problems, the invention discloses a dish washing machine and a door body thereof, which is disclosed by Chinese utility model patent with the patent number of CN202220222452.4 (the publication number of CN 216962393U), and comprises a control panel part, an inner door panel part, a water baffle and a sealing element, wherein the inner door panel part covers the control panel part; the water baffle is arranged in the control panel part; the water baffle is provided with a mounting groove; the sealing element is embedded in the mounting groove of the water baffle and is abutted against the inner door plate part. This patent is through making the improvement to seal structure to it is inside to solve the easy gap infiltration from door plant spare amalgamation of ponding on the door body, leads to setting up the technical problem who takes place to wade the electric accident easily in the electrical apparatus part in the door body.

Therefore, the patent mainly aims at sealing a gap at the splicing position of the outer door plate and the inner door plate so as to prevent water from flowing into an electric appliance part; and the position for placing the electric appliance component is reasonably designed, and water can be effectively prevented from permeating into the electric appliance component.

As the control panel, the door assembly and the dishwasher disclosed in the chinese utility model with the patent number CN202220378381.7 (with the publication number CN 217510441U), the control panel further includes a sealing member, specifically, the sealing member is disposed between the outer covering member and the bracket, and the sealing ring is disposed around the control portion. The sealing element is used for sealing a gap between the outer covering piece and the bracket so as to prevent liquid or impurities from entering the area where the control part is located from the gap between the outer covering piece and the bracket.

Therefore, the patent also discloses that a sealing member is arranged to prevent water from entering the electric appliance parts, and the method is single, so that the patent is to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that is to provide a door structure for dish washer that the position of placing electrical apparatus part is difficult for intaking to the current situation of prior art.

The second technical problem to be solved by the present invention is to provide a door structure for a dish washer, which can drain water.

The third technical problem to be solved in the utility model is to provide a dish washer of using above-mentioned door body structure to prior art's current situation.

The utility model provides a technical scheme that above-mentioned first technical problem adopted is: a door structure for a dishwasher comprises

A first door body;

the second door body is positioned on the front side of the first door body and connected with the first door body;

the door body is characterized in that the second door body is provided with a containing groove, an electric appliance part is contained in the containing groove, and a notch of the containing groove faces forwards.

In order to facilitate the formation of the accommodating groove, the second door body comprises a door plate and a panel arranged by being attached to the top wall of the door plate, a groove with the top and the front side open is formed in the door plate, and the accommodating groove and the panel jointly enclose the accommodating groove.

In order to facilitate the user to trigger the electrical appliance component and enable the household electrical appliance to perform corresponding operation, preferably, the panel is an operation panel for a user to operate instructions, and the electrical appliance component includes a control panel, and the control panel is electrically connected with the panel. The top of the groove is open, so that the panel can be conveniently contacted with the electric appliance part, and the front side of the groove is open, so that the electric appliance part can be conveniently arranged in the groove from front to back.

Preferably, an elastic piece is arranged in the accommodating groove and acts on the control plate, so that the control plate always keeps the trend of abutting against the panel. The elastic piece can make the control panel well contact with the panel, and avoids the influence on the sensitivity of the key due to the difference of the assembly size.

In order to ensure the strength of the door plate, the door plate comprises an upper door plate and a lower door plate which are sequentially arranged from top to bottom, the upper door plate is connected with the lower door plate, the groove is formed in the upper door plate, and the lower door plate is a metal plate. The lower door plate is a metal piece and has high strength.

In order to facilitate the assembly of the upper door plate and the lower door plate, the bottom of the upper door plate is provided with an inserting sheet, and the top of the lower door plate is provided with a jack for inserting a fastening pin; or the top of the lower door plate is provided with an inserting piece, and the bottom of the upper door plate is provided with a jack for inserting the buckling pin into the jack. Therefore, as long as the buckling pin is buckled in the jack, the pre-assembly of the upper door plate and the lower door plate is realized, and then the upper door plate and the lower door plate are positioned through other connecting parts, so that the operation is convenient and fast.

In order to improve the attractiveness of the second door body, the left side and the right side of the door plate are both provided with decorative strips, the cross sections of the decorative strips are U-shaped, and the left side and the right side of the door plate are at least partially wrapped in the U-shaped grooves of the decorative strips on the corresponding sides. The decorative strip has a simple structure and is convenient to assemble with the door panel.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: the door comprises a door body and is characterized in that a gap is formed between the front wall surface of the first door body and the rear wall surface of the second door body, a water guide structure is arranged on the rear wall surface of the door body and comprises first water guide ribs extending in the left-right direction, and the first water guide ribs incline towards the side wall of the door body from top to bottom.

In order to drain water downwards and finally flow out of the first door body and the second door body, the water guide structure further comprises a second water guide rib and a third water guide rib which are arranged oppositely, the second water guide rib and the third water guide rib are vertically arranged, and the upper end of the second water guide rib and the upper end of the third water guide rib are respectively connected with two ends of the first water guide rib.

In order to improve the aesthetic property of the second door body, a decorative plate is arranged on the second door body and comprises a vertical plate arranged on the front wall surface of the upper part of the door plate, and the vertical plate shields the notch of the accommodating groove. The decorative plate not only plays a role in beauty, but also forms a sealing cover for the front side opening of the containing groove.

Preferably, the decorative plate and the second door body are detachably connected, for example, the decorative plate and the second door body are connected through screws, buckles or other detachable connection modes, so that the decorative plate with a proper appearance can be replaced according to needs, and the electrical components can be conveniently repaired and replaced.

In order to open or close the door body structure conveniently, the upper portion of the second door body protrudes forwards to form a convex portion, the groove is formed in the convex portion, and the vertical plate of the decorative plate is arranged on the front wall face of the convex portion. The convex part is convenient for a user to hold so as to apply force to the upper part.

In order to further facilitate the force application on the convex part, the bottom of the convex part is provided with a groove with an open bottom to form a handle groove.

In order to improve the hand feeling of opening the door, the front wall surface of the handle buckling groove is an inclined surface which inclines forwards from top to bottom.

Preferably, a third door body is further arranged on the front side of the second door body, and the third door body is connected with the second door body. The third door body can not only improve the integral strength of the door body structure, but also play a decorative role.

One of the cooperation forms of the second door body and the third door body is as follows: the top wall surface of the third door body is flush with the top wall surface of the second door body, and a handle is arranged on the third door body. The whole body of the door body structure is flat and attractive, the door is opened and closed by applying force to the handle, and the third door body is sealed to the opening of the front side of the accommodating groove.

The other matching form of the second door body and the third door body is as follows: the upper portion of the second door body protrudes forwards to form a convex portion, the groove is formed in the convex portion, a decorative plate is arranged on the second door body and comprises a vertical plate arranged on the front wall face of the convex portion, the vertical plate shields the notch of the accommodating groove, and the third door body is located below the convex portion and has a distance with the convex portion. The door body structure is flat and attractive as a whole, and a user's hand extends into the gap between the convex part and the third door body to apply force on the convex part so as to open the door body structure.

In order to improve the attractiveness of the second door body, the left side and the right side of the door plate are both provided with decorative strips, the cross sections of the decorative strips are U-shaped, the left side and the right side of the door plate are at least partially wrapped in the U-shaped grooves of the decorative strips on the corresponding sides, the front wall surface and the rear wall surface of each decorative strip are connected with the door plate through connecting pieces, the front wall surface of each decorative strip is shielded by a third door body, and the rear wall surface of each decorative strip is shielded by a first door body. The decorative strip plays a role in beauty, and the connecting piece is hidden in the door body structure, so that the side face of the door body structure is simple and attractive.

The utility model provides a technical scheme that above-mentioned third technical problem adopted does: a dish washer of applied above-mentioned door body which characterized in that: the washing machine is characterized by further comprising a box body with a washing cavity, the front side of the washing cavity is open, and the door body structure can be rotatably arranged on the front side of the box body, so that the opening of the washing cavity is opened and closed.

Compared with the prior art, the utility model has the advantages that: 1. the utility model discloses the notch of the storage tank that will place electrical components is to first door body dorsad, and the notch of storage tank is forward promptly, and the rear side of storage tank is like this encapsulated situation, and first door body is located the rear side of second door body, can prevent like this that the water liquid between first door body and the second door body from entering into the storage tank, erosion electrical components; 2. the utility model discloses be equipped with the water guide structure on the back wall of the second door body, the water guide structure includes the first water guide muscle of top-down orientation lateral wall slope of the second door body, and the water liquid that gets into the gap between the first door body and the second door body like this can flow along first water guide muscle under the action of gravity to keep away from electrical components, promote electrical components's waterproof reliability.

Drawings

Fig. 1 is a schematic structural view of a door body structure according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;

FIG. 3 is a schematic structural view of the second door body in FIG. 2;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is a schematic view of the structure of FIG. 3 in another direction;

FIG. 6 is a cross-sectional view of FIG. 2;

FIG. 7 is an enlarged view taken at A of FIG. 6;

fig. 8 is a schematic structural view of a door body structure according to embodiment 2 of the present invention;

fig. 9 is a schematic structural view of fig. 8 with a third door body removed.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Example 1

As shown in fig. 1 to 7, the dishwasher in accordance with the preferred embodiment includes a cabinet (not shown in the drawings) having a washing chamber, a front side of which is open, and a door structure rotatably provided at the front side of the cabinet to open and close the opening of the washing chamber. The matching mode of the door body structure and the box body can adopt the prior art, and the details are not repeated.

The door body structure comprises a first door body 1, a second door body 2 and a third door body 3, wherein the first door body 1, the second door body 2 and the third door body 3 are sequentially arranged from back to front, the second door body 2 is connected with the first door body 1 through a connecting piece (such as a screw), the third door body 3 is connected with the second door body 2 through a connecting piece (such as a screw), the top wall surface of the third door body 3 is parallel and level with the top wall surface of the second door body 2, and a handle 31 is arranged on the third door body 3. The whole door body structure is flat and attractive, and the door is opened and closed by applying force on the handle 31. The first door body 1 and the third door body 3 can adopt the prior art.

As shown in fig. 3, 4 and 7, the second door body 2 is provided with a receiving groove 21, the receiving groove 21 is used for receiving electrical components, and a notch of the receiving groove 21 faces away from the first door body 1, i.e., the notch of the receiving groove 21 faces forward.

In this embodiment, the second door body 2 includes a door panel 22 and a panel 23 attached to the top wall of the door panel 22 for a user to operate, the door panel 22 is provided with a groove 221 with an open top and a front side, and the groove 221 and the panel 23 jointly enclose the accommodating groove 21. The electrical components can be arranged in the containing groove 21 from front to back, the electrical components comprise a control panel 24, the control panel 24 is electrically connected with the panel 23, an elastic piece 25 is arranged in the containing groove 21, and the elastic piece 25 acts on the control panel 24 to enable the control panel 24 to always keep the trend of abutting against the panel 23. The elastic element 25 can make the control panel 24 in good contact with the panel 23, and avoids the influence of assembly size difference on the sensitivity of the key.

The accommodating groove 21 is provided with a through hole 29 for the wiring harness to pass through, a sealing ring 291 is arranged at the through hole, and the wiring harness is electrically connected with the control board 24 to prevent the wiring harness from being corroded by water liquid.

The top of the recess 221 is open to facilitate access of the electrical components by the panel 23, and the front side of the recess 221 is open to facilitate loading of the electrical components into the recess 221 from front to back. In this embodiment, the panel 23 and the control panel 24 are electrically connected by the prior art, and are not described herein again, the panel 23 of this embodiment is equivalent to an outer covering member in the "control panel, door assembly and dishwasher" disclosed in the chinese utility model patent of CN202220378381.7 (with the publication number of CN 217510441U), and the control panel 24 is equivalent to a control portion in this patent.

In this embodiment, the door panel 22 includes an upper door panel 222 and a lower door panel 223 sequentially arranged from top to bottom, the upper door panel 222 is connected to the lower door panel 223, the groove 221 is formed in the upper door panel 222, and the lower door panel 223 is a metal plate. The upper door panel 222 may be a plastic piece, which facilitates the formation of the groove 221; the lower door plate 223 is a metal member and has high strength.

The bottom of the upper door panel 222 is provided with an insertion sheet 2221, and the top of the lower door panel 223 is provided with an insertion hole 2231 for the buckling leg 22211 to be inserted into. As long as the fastening foot 22211 is fastened in the insertion hole 2231, the pre-assembly of the upper door panel 222 and the lower door panel 223 is realized, the operation is convenient, and then the following decorative strip 26 is connected with the upper door panel 222 and the lower door panel 223 through screws respectively, so that the positioning of the decorative strip 26, the upper door panel 222 and the lower door panel 223 is realized.

Of course, the top of the lower door panel 223 may be provided with an insertion sheet 2221, and the bottom of the upper door panel 222 is provided with an insertion hole 2231 for the fastening foot 22211 to be inserted therein.

The decorative strips 26 are arranged on the left side and the right side of the door panel 22, the cross section of each decorative strip 26 is U-shaped, and the left side and the right side of the door panel 22 are wrapped in the U-shaped grooves 261 of the decorative strips 26 on the corresponding sides. The front wall surface and the rear wall surface of the trim strip 26 are connected with the door panel 22 through connecting pieces (such as screws), the front wall surface of the trim strip 26 is shielded by the third door body 3, and the rear wall surface of the trim strip 26 is shielded by the first door body 1. The decorative strip 26 plays a role in beauty, and the connecting piece is hidden inside the door body structure, so that the side surface of the door body structure is simple and attractive.

As shown in fig. 5, 6, and 7, a gap is formed between the front wall surface of the first door body 1 and the rear wall surface of the second door body 2, a water guide structure 4 is arranged on the rear wall surface of the door panel 22, the water guide structure 4 includes a first water guide rib 41, a second water guide rib 42 and a third water guide rib 43, the first water guide rib 41 extends in the left-right direction, the first water guide rib 41 inclines towards the side wall of the door panel 22 from top to bottom, the second water guide rib 42 and the third water guide rib 43 are arranged oppositely, the second water guide rib 42 and the third water guide rib 43 are arranged vertically, and the upper end of the second water guide rib 42 and the upper end of the third water guide rib 43 are respectively connected with two ends of the first water guide rib 41. The water entering the gap between the first door body 1 and the second door body 2 flows along the first water guiding rib 41 under the action of gravity, and then flows downward along the second water guiding rib 42 and the third water guiding rib 43, away from the electrical components.

Example 2

As shown in fig. 8 and 9, the following differences exist between the embodiment 2 and the embodiment 1:

1. in this embodiment, the upper portion of the upper door plate 222 protrudes forward to form a protrusion 27, the groove 221 is formed on the protrusion 27, the second door body 2 is provided with an L-shaped decorative plate 5, the horizontal plate 51 of the decorative plate 5 is spliced with the face plate 23 and is located on the same plane, the vertical plate 52 of the decorative plate 5 is arranged on the front wall surface of the protrusion 27, and the vertical plate 52 shields the notch of the accommodating groove 21. The decorative panel 5 is detachably attached to the second door body 2 by screws, so that the decorative panel 5 can be replaced with a suitable appearance as required. Of course, the decorative plate 5 may also include only the vertical plate 52, which requires the panel 23 to completely cover the top of the door panel 22, and the decorative plate 5 may be a metal member or a special plastic member.

The bottom of the convex part 27 is provided with a groove with an open bottom to form a handle buckling groove 28, the front wall of the handle buckling groove 28 is an inclined plane which inclines forwards from top to bottom, the inclination angle is 30-60 degrees, and the door opening and closing experience is good.

Third door 3 is located below convex portion 27 with a space from convex portion 27. The door body structure is flat and attractive as a whole, and a user's hand extends into the handle slot 28 from the space between the convex part 27 and the third door body 3 to apply force on the convex part 27 so as to open the door body structure. In this embodiment, both left and right sides of the convex portion 27 extend downward to form the extending portion 271, and the upper end of the third door body 3 abuts against the lower end of the extending portion 271.

2. The left and right sides of the door panel 22 are partially wrapped in the U-shaped groove 261 of the trim 26 on the corresponding side, and specifically, the left and right sides of the portion of the door panel 22 shielded by the third door body 3 are wrapped in the U-shaped groove 261.

In this embodiment, the third door 3 may not be provided, and the thickness of the lower portion of the second door 2 may be increased.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the invention can be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A door structure for a dishwasher comprises

A first door body (1);

the second door body (2) is positioned on the front side of the first door body (1), and the second door body (2) is connected with the first door body (1);

the door is characterized in that a containing groove (21) is formed in the second door body (2), an electric appliance part is contained in the containing groove (21), and a notch of the containing groove (21) faces forwards.

2. The door body structure according to claim 1, wherein: the second door body (2) comprises a door panel (22) and a panel (23) arranged by being attached to the top wall of the door panel (22), a groove (221) with the top and the front side open is formed in the door panel (22), and the groove (221) and the panel (23) jointly enclose the accommodating groove (21).

3. The door body structure according to claim 2, wherein: the panel (23) is an operation panel for a user to operate instructions, the electrical appliance component comprises a control panel (24), and the control panel (24) is electrically connected with the panel (23).

4. The door body structure according to claim 3, wherein: an elastic piece (25) is arranged in the accommodating groove (21), and the elastic piece (25) acts on the control plate (24) to enable the control plate (24) to always keep the trend of abutting against the panel (23).

5. The door body structure according to claim 2, wherein: the door plate (22) comprises an upper door plate (222) and a lower door plate (223) which are sequentially arranged from top to bottom, the upper door plate (222) is connected with the lower door plate (223), the groove (221) is formed in the upper door plate (222), and the lower door plate (223) is a metal plate.

6. The door body structure according to claim 5, wherein: the bottom of the upper door panel (222) is provided with an inserting sheet (2221), and the top of the lower door panel (223) is provided with an inserting hole (2231) for inserting the buckling foot (22211) into; or the top of the lower door panel (223) is provided with an inserting sheet (2221), and the bottom of the upper door panel (222) is provided with an inserting hole (2231) for the buckling foot (22211) to be inserted into.

7. The door body structure according to claim 2, wherein: decorative strips (26) are arranged on the left side and the right side of the door panel (22), the cross section of each decorative strip (26) is U-shaped, and the left side and the right side of the door panel (22) are at least partially wrapped in the U-shaped grooves (261) of the corresponding decorative strips (26).

8. The door body structure according to claim 2, wherein: the door comprises a door body (1), and is characterized in that a gap is formed between the front wall face of the first door body (1) and the rear wall face of the second door body (2), a water guide structure (4) is arranged on the rear wall face of the door plate (22), the water guide structure (4) comprises first water guide ribs (41) extending in the left-right direction, and the first water guide ribs (41) incline towards the side wall of the door plate (22) from top to bottom.

9. The door body structure according to claim 8, wherein: the water guide structure (4) further comprises a second water guide rib (42) and a third water guide rib (43) which are arranged oppositely, the second water guide rib (42) and the third water guide rib (43) are vertically arranged, and the upper end of the second water guide rib (42) and the upper end of the third water guide rib (43) are respectively connected with the two ends of the first water guide rib (41).

10. The door body structure according to claim 2, wherein: the second door body (2) is provided with a decorative plate (5), the decorative plate (5) comprises a vertical plate (52) arranged on the front wall surface of the upper part of the door plate (22), and the vertical plate (52) shields the notch of the accommodating groove (21).

11. The door body structure according to claim 10, wherein: the decorative plate (5) is detachably connected with the second door body (2).

12. The door body structure according to claim 10, wherein: the upper portion of the second door body (2) protrudes forwards to form a convex portion (27), the groove (221) is formed in the convex portion (27), and the vertical plate (52) of the decorative plate (5) is arranged on the front wall face of the convex portion (27).

13. The door body structure according to claim 12, wherein: the bottom of the convex part (27) is provided with a groove with an open bottom to form a handle groove (28).

14. The door body structure according to claim 13, wherein: the front wall surface of the handle slot (28) is an inclined surface inclined forwards from top to bottom.

15. The door body structure according to any one of claims 2 to 6, 8, and 9, wherein: the front side of the second door body (2) is also provided with a third door body (3), and the third door body (3) is connected with the second door body (2).

16. The door body structure according to claim 15, wherein: the top wall surface of the third door body (3) is flush with the top wall surface of the second door body (2), and a handle (31) is arranged on the third door body (3).

17. The door body structure according to claim 15, wherein: protruding formation convex part (27) before the upper portion of second door body (2), recess (221) are seted up on this convex part (27), be equipped with decorative board (5) on second door body (2), decorative board (5) are including setting up vertical board (52) on the leading wall of convex part (27), just vertical board (52) shield the notch of storage tank (21), third door body (3) be located the below of convex part (27) and with convex part (27) between have the interval.

18. The door body structure according to claim 15, wherein: the door is characterized in that decorative strips (26) are arranged on the left side and the right side of the door plate (22), the cross section of each decorative strip (26) is U-shaped, the left side and the right side of the door plate (22) are at least partially wrapped in U-shaped grooves (261) of the corresponding decorative strips (26), the front wall surface and the rear wall surface of each decorative strip (26) are connected with the door plate (22) through connecting pieces, the front wall surface of each decorative strip (26) is shielded by a third door body (3), and the rear wall surface of each decorative strip (26) is shielded by a first door body (1).

19. A dishwasher having the door structure according to any one of claims 1 to 18, wherein: the washing machine is characterized by further comprising a box body with a washing cavity, the front side of the washing cavity is open, and the door body structure can be rotatably arranged on the front side of the box body, so that the opening of the washing cavity is opened and closed.