CN217659615U - Cleaning device - Google Patents

Abstract

The utility model relates to a cleaning device includes: a rotating mechanism; the cleaning mechanism comprises a bearing assembly, a heating assembly and a cleaning piece, the bearing assembly is connected with the rotating mechanism, the heating assembly is arranged on the bearing assembly, the cleaning piece is arranged on the heating assembly, the heating assembly is used for heating the cleaning piece, and the cleaning mechanism rotates along with the rotating mechanism to enable the cleaning piece to be cleaned. When the cleaning mechanism rotates along with the rotating mechanism and the cleaning piece is contacted with the ground, the cleaning piece moves relative to the ground, so that the cleaning piece can clean stains on the ground. The heating assembly can heat the cleaning piece, and the cleaning piece can absorb heat on the heating assembly, so that the cleaning piece has a certain temperature, and under the action of the temperature, the cleaning piece is enabled to remove stains more easily, and the cleaning effect of the cleaning device is improved.

Description

Cleaning device

Technical Field

The utility model relates to a clean technical field especially relates to a cleaning device.

Background

Cleaning devices such as mopping machines and the like are used for cleaning the ground, and the cleaning devices drive the mop to rotate by adopting the rotating shaft, so that the mop rotates relative to the ground, and therefore stains on the ground are cleaned. However, conventional cleaning devices often suffer from the drawback of incomplete cleaning of the stains, resulting in an impact on the cleaning efficiency of the cleaning device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be how to improve cleaning device's clean effect.

A cleaning device, comprising:

a rotating mechanism; and

the cleaning mechanism comprises a bearing assembly, a heating assembly and a cleaning piece, the bearing assembly is connected with a rotating mechanism, the heating assembly is arranged on the bearing assembly, the cleaning piece is arranged on the heating assembly, the heating assembly is used for heating the cleaning piece, and the cleaning mechanism rotates along with the rotating mechanism to enable the cleaning piece to be cleaned.

In one embodiment, the bearing assembly is detachably connected with the rotating mechanism.

In one embodiment, the rotating mechanism comprises a rotating shaft, the rotating shaft is provided with a containing cavity, the bearing assembly comprises an adapter, the adapter comprises an abutting unit, an inserting unit and a boss, the abutting unit is provided with an abutting surface, the inserting unit is arranged on the abutting surface and protrudes relative to the abutting surface, the inserting unit is provided with a lateral peripheral surface matched with the containing cavity, the boss is connected with the lateral peripheral surface and protrudes relative to the lateral peripheral surface, and the end of the rotating shaft abuts against the abutting surface and is provided with a clamping groove matched with the boss.

In one embodiment, the rotating mechanism further includes an elastic body, the elastic body is fixed on the rotating shaft and is accommodated in the accommodating cavity, an annular groove is formed in the side peripheral surface, and the elastic body is matched with the annular groove and is connected with the inserting unit in a buckling mode.

In one embodiment, the bearing assembly further comprises a bearing piece and an elastic piece, the cleaning piece is arranged on the bearing piece, the bearing piece is connected with the abutting unit in a sliding mode, and the elastic piece is abutted between the bearing piece and the abutting unit.

In one embodiment, the abutting unit comprises a bottom plate, a convex column and a stop member, the abutting surface is arranged on the bottom plate, the bottom plate is further provided with a limiting surface opposite to the abutting surface in direction, the convex column is connected with the limiting surface in a protruding mode, the bearing member is provided with a sliding hole, the convex column is connected with the sliding hole in a sliding mode, and the stop member is connected with the convex column and abutted to the bearing member.

In one embodiment, the abutting unit further includes a sleeve connected to the limiting surface and disposed around the protruding cylinder, the bearing includes a sliding portion, the sliding hole is formed in the sliding portion, a sliding cavity is formed between the sleeve and the protruding cylinder, and the sliding portion is in sliding fit with the sliding cavity.

In one embodiment, at least one of the following schemes is further included:

the heating component comprises a heating element and a heat conducting plate, a groove is formed in the bearing component, the heating element is matched with the groove, the heat conducting plate is connected with the bearing component and abuts against the heating element, and the cleaning element is connected with the heat conducting plate;

the rotating mechanism comprises a rotating shaft and a gear, and the gear is sleeved on the rotating shaft.

In one embodiment, the heating device further comprises a first conductive element, a second conductive element and a temperature control plate, wherein the first conductive element is arranged in the rotating mechanism in a penetrating manner and is electrically connected with the second conductive element, the second conductive element is fixed in the rotating mechanism, and the temperature control plate is arranged on the heating element and is electrically connected with the second conductive element.

In one embodiment, the second conductive assembly includes an upper seat, a lower seat, an ejector pin, and a conductive column, the upper seat and the lower seat are stacked, the ejector pin is inserted into the upper seat, one end of the ejector pin, which is far away from the lower seat, is electrically connected to the first conductive group, the lower seat includes a base body and a contact body, the contact body is disposed on a surface of the base body, which faces the upper seat, and is in contact with the ejector pin, and the conductive column is inserted into the base body and is simultaneously electrically connected to the contact body and the temperature control board.

In one embodiment, the first conductive assembly includes an outer sleeve, an inner sleeve and a wire, the outer sleeve is fixed in the rotating mechanism, the inner sleeve is rotatably sleeved in the outer sleeve, and the wire is inserted into the inner sleeve and is pressed against the second conductive assembly to be electrically connected.

In one embodiment, the rotating mechanism comprises a rotating shaft and a gear, and the gear is sleeved on the rotating shaft.

The utility model discloses a technical effect of an embodiment is: when the cleaning mechanism rotates along with the rotating mechanism and the cleaning piece is contacted with the ground, the cleaning piece moves relative to the ground, so that the cleaning piece can clean stains on the ground. The heating assembly can heat the cleaning piece, and the cleaning piece can absorb heat on the heating assembly, so that the cleaning piece has a certain temperature, and under the action of the temperature, the cleaning piece is enabled to remove stains more easily, and the cleaning effect of the cleaning device is improved.

Drawings

Fig. 1 is a schematic perspective view of a cleaning device according to an embodiment;

FIG. 2 is an exploded view of the cleaning device shown in FIG. 1;

FIG. 3 is a schematic plan sectional view of the cleaning apparatus shown in FIG. 1;

FIG. 4 is a schematic view of a partial perspective cross-sectional structure of the cleaning device shown in FIG. 1;

FIG. 5 is a partially exploded perspective cross-sectional view of the cleaning device shown in FIG. 1;

fig. 6 is a partially exploded view of the cleaning device shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Referring to fig. 1, 2, 3 and 4, a cleaning device 10 according to an embodiment of the present invention is used for cleaning stains on a floor, and the cleaning device 10 includes a rotating mechanism 100, a cleaning mechanism 200, a first conductive assembly 300, a second conductive assembly 400 and a temperature control board 500.

Referring to fig. 1, 2, 3 and 4, in some embodiments, the rotating mechanism 100 includes a rotating shaft 110, a gear 120 and an elastic body 130, and the rotating shaft 110 may be a hollow structure, such that the rotating shaft 110 has a receiving cavity 111. The elastic body 130 is fixedly connected with the rotating shaft 110 and is accommodated in the accommodating cavity 111, the gear 120 is sleeved on the rotating shaft 110, the gear 120 and the rotating shaft 110 can rotate synchronously, and when the gear 120 is driven under the action of external force, the gear 120 drives the rotating shaft 110 and the rotating shaft 110 to rotate around the central axis of the rotating shaft 110 at the same time.

Referring to fig. 4 and 6, in some embodiments, the cleaning mechanism 200 includes a carrier assembly 201, a heating assembly 202, and a cleaning member 203, the carrier assembly 201 is coupled to the shaft 110, the heating assembly 202 is disposed on the carrier assembly 201, and the cleaning member 203 is disposed on the heating assembly 202. The carrier assembly 201 includes an adaptor 210, a carrier 220, and a resilient member 230. The heating assembly 202 includes a heating element 202a and a thermally conductive plate 202b.

Referring to fig. 2, 3, 4 and 5, the adaptor 210 includes an abutting unit 211, an inserting unit 212 and a boss 213. The abutment unit 211 includes a bottom plate 2110, a boss 211a, a stopper 211b, and a sleeve 211c. The bottom plate 2110 and the boss 213 extend in a horizontal direction, and the insertion unit 212, the boss 211a, and the sleeve 211c extend in a vertical direction. The base plate 2110 has an abutment surface 2112 and a stopper surface 2111, and the abutment surface 2112 and the stopper surface 2111 are both surfaces in the thickness direction of the base plate 2110, and it is apparent that the abutment surface 2112 and the stopper surface 2111 are oriented in opposite directions, the abutment surface 2112 is disposed upward, and the stopper surface 2111 is disposed downward. The insertion unit 212 is connected to the contact surface 2112 and protrudes upward by a certain length relative to the contact surface 2112, the insertion unit 212 is accommodated in the accommodating chamber 111, the insertion unit 212 includes a lateral peripheral surface 212a, the lateral peripheral surface 212a is an annular surface, and the lateral peripheral surface 212a is matched with the accommodating chamber 111. The side circumferential surface 212a is opened with an annular groove 212b, and the annular groove 212b may be formed along a predetermined depth perpendicular to the axial direction of the insertion unit 212. The elastic body 130 is fitted with the annular groove 221 such that the elastic body 130 forms a snap-fit connection relationship with the insertion unit 212. When a downward force is applied to the adapter 210, the elastomer 130 may be disengaged from the annular groove 212b, thereby unloading the adapter 210 from the shaft 110. When the upward action is provided to the adaptor 210, the insertion unit 212 can be inserted into the receiving cavity 111, and the elastic body 130 is provided to be matched with the annular groove 212b, so that the elastic body 130 can perform clamping and lifting actions on the whole adaptor 210, prevent the insertion unit 212 from being separated from the receiving cavity 111 under the action of gravity, and ensure that the adaptor 210 is stably and reliably fixed on the rotating shaft 110. The carrier assembly 201 and the whole cleaning mechanism 200 can be detachably connected, considering that the elastic body 130 and the insertion unit 212 form a snap connection relationship.

The boss 213 is disposed on the side circumferential surface 212a, the boss 213 protrudes a certain length from the side circumferential surface 212a along an axial direction perpendicular to the insertion unit 212, and the rotating shaft 110 is provided with a slot 112, and the slot 112 is communicated with the receiving cavity 111. When the insertion unit 212 is received in the receiving cavity 111, the boss 213 is engaged with the slot 112, and the lower end of the rotating shaft 110 is abutted against the abutment surface 2112. The abutment surface 2112 can provide a good limit for the installation of the connector 210. Through the matching of the boss 213 and the slot 112, the rotating shaft 110 can apply a torque to the whole adaptor 210 through the boss 213, and the synchronous rotation of the rotating shaft 110 and the adaptor 210 is ensured.

The convex cylinder 211a is connected with the limiting surface 2111, the convex cylinder 211a protrudes downwards for a certain length relative to the limiting surface 2111, the sleeve 211c is disposed around the convex cylinder 211a, so that a sliding cavity 211e is formed between the sleeve 211c and the convex cylinder 211a, the bearing component 220 includes a sliding portion 222, the sliding portion 222 is provided with a sliding hole 222a and a matching groove 222b, and the matching groove 222b is disposed around the sliding hole 222 a. The sliding part 222 is in sliding fit with the sliding cavity 211e, and the convex column 211a is in sliding fit with the sliding hole 222 a; it can also be understood that the sliding portion 222 is disposed on the convex pillar 211a, and the sleeve 211c is disposed on the sliding portion 222. The cross section of the convex cylinder 211a may be polygonal, and the sliding hole 222a may be a polygonal hole, so that the convex cylinder 211a can only slide in the sliding hole 222a, thereby preventing the convex cylinder 211a from rotating in the sliding hole 222a, and ensuring that the convex cylinder 211a drives the sliding portion 222 to rotate synchronously, that is, the entire bearing member 220 rotates synchronously with the adaptor 210. A portion of the elastic member 230 may be received in the engaging groove 222b, and the engaging groove 222b may limit the elastic member 230, so that the elastic member 230 is pressed between the sliding portion 222 and the limiting surface 2111 of the base plate 2110. The sliding portion 222 can be sleeved with a sealing ring, the sealing ring is pressed between the sliding portion 222 and the sleeve 211c, and the sealing ring can seal the sliding cavity 211e to prevent external dust and liquid drops from entering the sliding cavity 211 e.

The convex column 211a may be opened with a mounting hole 211d, and the stop part 211b may be a bolt, which is inserted into the sliding part 222 and is matched with the mounting hole 211 d. Under the action of the elastic member 230, the sliding portion 222 will be pressed against the nut of the bolt. Therefore, during the sliding of the sliding portion 222 in the sliding cavity 211e, when the sliding portion 222 abuts against the stopper surface 2111, the stopper surface 2111 defines the limit position at which the sliding portion 222 slides upward; when the sliding portion 222 abuts against the nut of the bolt, the nut of the bolt defines the limit position of the sliding portion 222 sliding downward, so that the stopper 211b and the bottom plate 2110 limit the sliding of the sliding portion 222 upward and downward. Since the sliding portion 222 is slidably engaged with the sliding cavity 211e, and the protruding pillar 211a is slidably engaged with the sliding hole 222a, the sliding connection relationship between the carrier 220 and the adaptor 210 can be finally realized.

The heating assembly 202 comprises a heating element 202a and a heat conducting plate 202b, a groove 221 is formed in the surface of the bearing element 220, which faces away from the adapter element 210, the heating element 202a is of a ring structure, the heating element 202a can be a resistance wire, when the heating element 202a is electrified, the heating element 202a can convert electric energy into heat energy, and the heating element 202a is matched with the groove 221, so that the groove 221 has a limiting effect on the installation of the heating element 202 a. The thermally conductive plate 202b is arranged on the surface of the carrier 220 facing away from the adapter piece 210, the thermally conductive plate 202b being able to be screwed to the carrier 220. When the heat conductive plate 202b is fixed to the carrier 220, the heat conductive plate 202b covers the recess 221 while the heat conductive plate 202b is pressed against the heating member 202a, so that the heating member 202a is pressed between the heat conductive plate 202b and the carrier 220. The heat generated by the heating element 202a is transferred to the thermally conductive plate 202b. The thermal control plate 500 may be a circuit board, the thermal control plate 500 is disposed on the thermal conductive plate 202b, and the temperature control plate 500 may monitor the temperatures of the heating element 202a and the thermal conductive plate 202b in real time. In other embodiments, the heating member 202a may be a film-like heating film or the like.

The first conductive element 300 is disposed through the rotating shaft 110 and electrically connected to the control host, the second conductive element 400 includes an upper base 410, a lower base 420, a thimble 430 and a conductive post 440, and both the upper base 410 and the lower base 420 are fixedly connected to the rotating shaft 110 and located in the accommodating cavity 111. The upper seat 410 and the lower seat 420 are stacked, the upper seat 410 is located above the lower seat 420, the thimble 430 is inserted into the upper seat 410, the lower seat 420 includes a base 421 and a contact 422, the base 421 is fixedly connected with the rotating shaft 110, the contact 422 is arranged on the surface of the base 421 facing the upper seat 410, and the contact 422 may be an annular structure. The end of the thimble 430 far away from the lower base 420 is an upper end, and the upper end of the thimble 430 is electrically connected with the first conductive element 300; one end of the thimble 430 close to the lower seat 420 is a lower end, and the lower end of the thimble 430 is electrically connected with the contact 422. The conductive pillar 440 penetrates the substrate 421, one end of the conductive pillar 440 close to the upper seat 410 is an upper end, and the upper end of the conductive pillar 440 is electrically connected to the contact 422; the lower end of the conductive pillar 440 is far away from the upper base 410, and the lower end of the conductive pillar 440 is electrically connected to the thermal control plate 500. Therefore, through the combined action of the conductive column 440, the contact body 422 and the thimble 430, the electrical connection relationship between the temperature control board 500 and the first conductive assembly 300 is realized, and since the first conductive assembly 300 is connected with the control host, the electrical connection relationship between the temperature control board 500 and the control host can be finally realized, so that the temperature control board 500 can feed back the temperature information to the control host.

The first conductive element 300 includes an outer sleeve 310, an inner sleeve 320 and a conductive wire 330, the outer sleeve 310 is fixed in the rotating shaft 110, the inner sleeve 320 is rotatably sleeved in the outer sleeve 310, the conductive wire 330 is inserted into the inner sleeve 320 and elastically pressed against the thimble 430 of the second conductive element 400, so as to realize the electrical connection relationship between the conductive wire 330 and the thimble 430, and finally realize the electrical connection relationship between the first conductive element 300 and the second guide element 400. During operation, the second conductive element 400 rotates synchronously with the rotating shaft 110, but the inner sleeve 320 and the conductive wire 330 do not rotate along with the rotating shaft 110, thereby improving the stability and reliability of the electrical connection between the conductive wire 330 and the thimble 430.

Therefore, when the temperature control board 500 monitors that the temperature of the heating wire and the heat conducting plate 202b is too high, the temperature control board 500 feeds back the information of the too high temperature to the control host, so that the current loaded on the heating element 202a is reasonably reduced. When the temperature control board 500 monitors that the temperature of the heating wire and the heat conducting plate 202b is too low, the temperature control board 500 feeds back the too low temperature information to the control host, so that the current loaded on the heating element 202a is reasonably increased. Therefore, by arranging the temperature control plate 500, the temperatures of the heating member 202a and the heat conducting plate 202b can be reasonably adjusted, and further, the temperature of the cleaning member 203 can be reasonably adjusted.

The cleaning member 203 may be made of cloth material, and the cleaning member 203 is fixed on the heat conductive plate 202b, for example, the cleaning member 203 may be attached to the heat conductive plate 202b by a hook and loop fastener, so that the heat generated by the heating member 202a is conducted to the cleaning member 203 through the heat conductive plate 202b.

Referring to fig. 2, 3, 4 and 5, the operation of the cleaning device 10 is described as follows:

when the gear 120 drives the rotating shaft 110 to rotate, the rotating shaft 110 drives the adaptor 210 to rotate through the boss 213, so that the whole cleaning mechanism 200 rotates along with the rotating shaft 110, and when the cleaning piece 203 contacts with the ground, the cleaning piece 203 moves relative to the ground, so that the dirt on the ground is removed by the cleaning piece 203. Since the cleaning member 203 can absorb the heat of the heat conducting plate 202b, the cleaning member 203 has a certain temperature, and the cleaning member 203 can remove the dirt more easily due to the temperature, thereby improving the cleaning effect of the cleaning device 10. Through the arrangement of the temperature control plate 500, the temperatures of the heating member 202a, the heat conducting plate 202b and the cleaning member 203 can be reasonably adjusted, so that different stains can be cleaned, and the cleaning device 10 can be kept to have good cleaning effect on different stains. Meanwhile, the bearing member 220 is slidably connected with the adapter member 210, so that the cleaning member 203 can slide up and down relative to the adapter member 210 along with the bearing member 220, that is, the cleaning member 203 can float in a small range in a limited stroke between the limiting surface 2111 and the stop member 211b, and under the pushing action of the elastic member 230, the cleaning member 203 can be suitable for the shape of the ground and keep fit with the ground, the cleaning member 203 is prevented from being incapable of contacting with dirt, and the cleaning effect of the cleaning device 10 can be improved. In view of the snap-fit connection relationship of the elastic body 130 and the insertion unit 212, the carrier assembly 201 and the entire cleaning mechanism 200 can be detachably connected, so that the carrier 220 can be unloaded from the rotating shaft 110 for replacement or maintenance of the cleaning member 203.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (12)

1. A cleaning device, comprising:

a rotating mechanism; and

the cleaning mechanism comprises a bearing assembly, a heating assembly and a cleaning piece, the bearing assembly is connected with the rotating mechanism, the heating assembly is arranged on the bearing assembly, the cleaning piece is arranged on the heating assembly, the heating assembly is used for heating the cleaning piece, and the cleaning mechanism rotates along with the rotating mechanism to enable the cleaning piece to be cleaned.

2. The cleaning apparatus defined in claim 1, wherein the carrier assembly is removably connected to the rotation mechanism.

3. The cleaning device as claimed in claim 1, wherein the rotating mechanism includes a rotating shaft, the rotating shaft is provided with a receiving cavity, the bearing assembly includes an adapter, the adapter includes a butting unit, an inserting unit and a boss, the butting unit has a butting surface, the inserting unit is disposed on the butting surface and protrudes relative to the butting surface, the inserting unit has a lateral peripheral surface matched with the receiving cavity, the boss is connected with the lateral peripheral surface and protrudes relative to the lateral peripheral surface, and an end of the rotating shaft is butted against the butting surface and is provided with a clamping groove matched with the boss.

4. The cleaning device as claimed in claim 3, wherein the rotating mechanism further comprises an elastic body, the elastic body is fixed on the rotating shaft and is accommodated in the accommodating cavity, an annular groove is formed on the side circumferential surface, and the elastic body is matched with the annular groove and is connected with the inserting unit in a buckling manner.

5. The cleaning device of claim 3, wherein the carrier assembly further comprises a carrier on which the cleaning element is disposed, the carrier being slidably connected to the abutment unit, and a resilient member that is compressed between the carrier and the abutment unit.

6. The cleaning device as claimed in claim 5, wherein the abutting unit comprises a bottom plate, a protruding pillar and a stop member, the abutting surface is disposed on the bottom plate, the bottom plate further has a limiting surface facing opposite to the abutting surface, the protruding pillar is connected with the limiting surface in a protruding manner, the bearing member is provided with a sliding hole, the protruding pillar is connected with the sliding hole in a sliding manner, and the stop member is connected with the protruding pillar and abuts against the bearing member.

7. The cleaning device as claimed in claim 6, wherein the abutting unit further comprises a sleeve connected to the limiting surface and disposed around the protruding pillar, the bearing member comprises a sliding portion, the sliding hole is disposed on the sliding portion, a sliding cavity is formed between the sleeve and the protruding pillar, and the sliding portion is in sliding fit with the sliding cavity.

8. The cleaning device of claim 1, wherein the heating assembly comprises a heating element and a heat conducting plate, the carrying assembly is provided with a groove, the heating element is matched with the groove, the heat conducting plate is connected with the carrying assembly and presses against the heating element, and the cleaning element is connected with the heat conducting plate.

9. The cleaning apparatus as claimed in claim 1, further comprising a first conductive element, a second conductive element and a temperature control plate, wherein the first conductive element is disposed through the rotating mechanism and electrically connected to the second conductive element, the second conductive element is fixed in the rotating mechanism, and the temperature control plate is disposed on the heating element and electrically connected to the second conductive element.

10. The cleaning apparatus as claimed in claim 9, wherein the second conductive assembly includes an upper seat, a lower seat, a needle, and a conductive post, the upper seat and the lower seat are stacked, the needle is inserted into the upper seat, an end of the needle away from the lower seat is electrically connected to the first conductive group, the lower seat includes a base body and a contact body, the contact body is disposed on a surface of the base body facing the upper seat and is in contact with the needle, and the conductive post is inserted into the base body and is electrically connected to the contact body and the temperature control board.

11. The cleaning device as claimed in claim 9, wherein the first conductive member includes an outer sleeve, an inner sleeve and a conductive wire, the outer sleeve is fixed in the rotating mechanism, the inner sleeve is rotatably sleeved in the outer sleeve, and the conductive wire is inserted into the inner sleeve and is pressed against the second conductive member to be electrically connected therewith.

12. The cleaning apparatus as claimed in claim 1, wherein the rotating mechanism comprises a rotating shaft and a gear, and the gear is sleeved on the rotating shaft.

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