CN110192754B

CN110192754B - Tool for taking infant milk powder

Info

Publication number: CN110192754B
Application number: CN201910487342.3A
Authority: CN
Inventors: 张强
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-11-27
Anticipated expiration: 2039-06-05
Also published as: CN110192754A

Abstract

The embodiment of the invention discloses a tool for taking infant milk powder, which comprises a cover body, a base, a side wall, a limiting device and a funnel, wherein the side wall is cylindrical and is arranged between the cover body and the base, the cover body can be tightly combined with a milk powder tank, a funnel circular opening is arranged in the middle of the cover body, the funnel is detachably arranged below the circular opening, the limiting device is arranged in the side wall and is attached to the bottom end of the funnel and used for limiting a milk powder spoon to be closely attached to the lower end of the funnel in the milk powder taking process, and an opening is arranged on the side wall corresponding to the limiting device; the tool can conveniently select milk powder, prevent the milk powder from scattering outside, shorten the contact time of the milk powder and the outside and avoid the pollution of outside bacteria.

Description

Tool for taking infant milk powder

Technical Field

The embodiment of the invention relates to the technical field of infant milk powder, in particular to a tool for taking infant milk powder.

Background

Breast milk is the best food for babies, the quality of children eating breast milk is good, as breast milk contains various immunocompetent substances, but the babies often cannot breast milk due to insufficient breast milk or various reasons such as bodies, and more infant milk powder is selected to provide nutrition for the babies; with the improvement of modern scientific technology, the nutrient elements of most infant milk powder are more and more comprehensive and abundant, and are closer to the nutrition of breast milk, for example, in addition to conventional elements such as calcium, phosphorus, iron, iodine, zinc and the like, vitamin A, D, E, vitamin C, B complex, folic acid, pantothenic acid and the like which are unique in breast milk are added. Therefore, the infant milk powder adjusts the proportion of protein, fat and lactose, so that the infant milk powder is suitable for the digestion and absorption of infants; various nutrient substances are also added into the infant milk powder; in addition, the infant milk powder has different nutritional formulas for different growth stages of infants.

Present infant's milk powder jar all is equipped with the milk powder spoon, all need uncap when helping baby to brew milk powder at every turn and dig with the ladle and get, however this mode easily causes the milk powder to spill outward, and uncap outside bacterium at every turn and pollute the interior milk powder of jar easily, and is inconvenient more unhygienic.

Disclosure of Invention

Therefore, the embodiment of the invention provides a tool for taking milk powder for infants, and aims to solve the problems of milk powder scattering, easy pollution, inconvenience and insanitation in the prior art that milk powder is scooped by a spoon after a cover is opened.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to a first aspect of the embodiment of the invention, the tool for taking infant milk powder comprises a cover body, a base, a side wall, a limiting device and a funnel, wherein the side wall is cylindrical and is arranged between the cover body and the base, the cover body can be tightly combined with a milk powder tank, a circular opening is formed in the middle of the cover body, the funnel is detachably mounted below the circular opening, the limiting device is arranged in the side wall and is attached to the bottom end of the funnel and used for limiting a milk powder spoon to be tightly attached to the lower end of the funnel in a milk powder taking process, and an opening is formed in the side wall corresponding to the limiting device.

The tool is tightly combined with the milk powder tank through the cover body, so that milk powder in the milk powder tank can flow into the funnel, the milk powder spoon can be limited through the limiting device, the position under the funnel is ensured, the bottom end of the funnel is controlled to be opened or sealed along with the movement of the milk powder spoon, and then the milk powder is selected.

Furthermore, the funnel is detachably mounted below the circular opening, specifically, slots are respectively formed in the positions, close to the two sides of the circular opening, of the lower surface of the cover body, two plugs corresponding to the slots are arranged at the edge of the funnel, and the plugs are detachably inserted into the slots.

Further, the side wall is detachably connected with the cover body and the base, and may be in a threaded connection, for example.

Further, a sealing door is arranged at the opening position. Can make only opening the sealing door at the selection milk powder in-process through the sealing door setting, the pollution of external bacterium to milk powder of reduction that can be better.

Further, the funnel is an inclined funnel, and the bottom end of the inclined funnel is inclined towards the opening position.

Furthermore, the side wall is made of transparent materials.

Further, the inner wall of the cover body is provided with a rubber sealing ring, and the inner diameter of the rubber sealing ring is smaller than the outer diameter of the milk powder tank. Through rubber seal's setting, when the milk powder jar back-off is in when the lid is internal, can realize the lid and milk powder jar sealed through rubber seal, reach zonulae occludens.

Furthermore, the bottom of funnel is provided with the limiting plate, be provided with the spout on the both sides limit of limiting plate lower surface respectively. Through the setting of limiting plate, can improve stop device is right the area of contact of funnel bottom improves sealing performance.

Further, stop device includes fixed plate and closing plate, the fixed plate is fixed to be set up and is keeping away from the open-ended funnel one side, the horizontal plane of funnel bottom is corresponding be provided with the socket on the fixed plate, the both sides edge of closing plate upper surface be provided with respectively with the corresponding first arch of spout, first protruding slidable cartridge is in the spout, closing plate slidable cartridge is in the socket, and the laminating is in the bottom of funnel, the closing plate is close to open-ended one end is provided with the baffle with milk powder spoon surface shape assorted, the other end of closing plate with be provided with first spring between the fixed plate, be provided with the blind hole on the closing plate, can dismantle in the blind hole and be provided with the gim peg.

According to the limiting device, the milk powder spoon and the baffle are combined in a sealing mode through the baffle in the milk powder taking process, milk powder is prevented from leaking between the milk powder spoon and the baffle, the sealing plate can move along with the milk powder spoon under the action of the first spring in the milk powder spoon withdrawing process after milk powder is taken through the arrangement of the first spring, the funnel opening is sealed, and the sealing plate can be enabled to be tightly attached to the funnel through the matching of the first protrusion and the sliding groove.

Further, the distance between the baffle and the opening is minimum zero during the sliding process of the sealing plate. Through the setting to above-mentioned characteristic, can clearly confirm the baffle position in the opening position, get the milk powder in-process again, easily control milk powder spoon and baffle closely combine, avoid because milk powder spoon position is inaccurate, cause to produce the gap between milk powder spoon and the baffle, cause milk powder to leak from the gap and produce extravagantly.

Further, stop device still includes mild steel plate, arc elastic plate, it is protruding to be provided with the second on the fixed plate, the second is protruding the below of closing plate, and with the vertical distance of closing plate is less than the height of milk powder spoon, mild steel plate one end is the level setting, and the other end is the arc setting, the tip of the arc end of mild steel plate can be dismantled and fix on the base, another tip setting is in the below of closing plate and prop up and be in the protruding lower surface of second, the arc elastic plate sets up respectively the both sides of the horizontal end of mild steel plate.

According to the invention, an upward force is provided for the horizontal end of the mild steel plate through the rigidity of the arc-shaped end part of the mild steel plate, an upward extrusion force can be provided for the milk powder spoon in the milk powder taking process, so that the milk powder spoon is tightly attached to the lower end of the funnel, the milk powder is prevented from leaking outwards, and the milk powder spoon is prevented from moving left and right and causing the milk powder to leak outwards through the arrangement of the arc-shaped elastic plate.

Further, the arc-shaped elastic plate can be arranged in a manner that: the horizontal end part both sides of mild steel board are provided with two spaced fourth archs respectively, arc elastic plate one end is fixed the horizontal end tip of mild steel board, the other end passes the gap between two fourth archs that the interval set up.

Further, the end part of the arc-shaped end of the mild steel plate is detachably fixed on the base, specifically, a jack is arranged on the base, and the end part of the arc-shaped side of the mild steel plate is inserted into the jack.

Furthermore, the end part of the horizontal end of the mild steel plate is provided with a third protrusion, the fixed plate is provided with a vertical groove matched with the third protrusion, and the vertical groove is arranged below the second protrusion. Through the setting of third arch and vertical recess, can avoid removing about mild steel plate.

Furthermore, the limiting device also comprises a second spring, the second spring is arranged in the vertical groove, one end of the second spring is fixed at the bottom of the third bulge, and the other end of the second spring is directly abutted to the bottom of the vertical groove; preferably, the top end notch of the vertical groove is larger than the cross section of the bottom vertical groove, so that a second spring can be placed in the vertical groove conveniently. Through the setting of second spring, assurance that can be better mild steel plate receives an ascending effort, at getting the milk powder in-process, can be better act on the milk powder spoon with the effort through mild steel plate for the milk powder spoon with funnel low side combines closely, avoids milk powder to leak outward.

Furthermore, the tool also comprises a counting device, the counting device is arranged in the side wall and is positioned at one side of the sealing plate far away from the opening, the counting device comprises a fixed shaft, an elastic rotating device, a sleeve and a pushing device, two ends of the fixed shaft are fixed on the side wall, the sleeve is sleeved on the fixed shaft, the elastic rotating device is arranged between the fixed shaft and the sleeve, one end of the sleeve is provided with fourth bulges at intervals, the fourth bulges are positioned below the pushing device, the other end of the sleeve is provided with display plates corresponding to the fourth bulges at intervals, the display plates are provided with numbers for counting, the side wall corresponding to the display plates is provided with a switchable limiting door, the inner surface of the limiting door is provided with a fifth bulge, and the fifth bulge is used for limiting the display plates, the pushing device comprises a pushing plate and a blocking piece, a strip-shaped through hole is formed in one end of the pushing plate, the other end of the pushing plate is fixed with the end portion of the sealing plate, the cross section of the strip-shaped through hole is in a right-angle trapezoidal shape, the lower surface of the pushing plate is adjacent to one side of the inclined edge of the strip-shaped through hole, a sixth bulge is arranged on one side of the inclined edge of the strip-shaped through hole, the blocking piece is in an L shape, and the vertical end.

According to the invention, through the arrangement of the counting device, quantitative measurement according to the allocated milk powder spoon can be ensured on the premise of quickly and sanitarily taking milk powder, and the spoon taken each time can be read from the counting device.

The embodiment of the invention has the following advantages:

the tool is tightly combined with the milk powder tank through the cover body, so that milk powder in the milk powder tank can flow into the funnel, the milk powder spoon can be limited through the limiting device, the position under the funnel is ensured, the bottom end of the funnel is controlled to be opened or sealed along with the movement of the milk powder spoon, and then milk powder is selected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic cross-sectional view of a tool for taking infant milk powder according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a fixing plate according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a counting device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a pushing device according to an embodiment of the present invention.

In the figure:

1-cover, 11-round opening; 2-base, 21-jack; 3-side wall, 31-opening, 32-sealing door; 4-a limiting device, 41-a fixing plate, 42-a sealing plate, 43-a socket, 44-a baffle, 45-a first spring, 46-a blind hole, 47-a soft steel plate, 48-an arc elastic plate, 49-a second bulge, 50-a fourth bulge, 51-a vertical groove, 52-a second spring and 53-a fixing bolt; 6-funnel, 61-limit plate; 71-fixed shaft, 72-elastic rotary device, 73-sleeve, 74-pushing device, 75-fourth protrusion, 76-display plate, 77-pushing plate, 78-baffle plate, 79-strip-shaped through hole and 80-sixth protrusion.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a tool for taking milk powder for infants, which comprises a cover body 1, a base 2, a side wall 3, a limiting device 4 and a funnel 6, wherein the side wall 3 is cylindrical and is arranged between the cover body 1 and the base 2, the cover body 1 can be tightly combined with a milk powder tank, a circular opening 11 is arranged in the middle of the cover body 1, the funnel 6 is detachably arranged below the circular opening 11, the limiting device 4 is arranged in the side wall 3 and is attached to the bottom end of the funnel 6 and used for limiting a milk powder spoon to be tightly attached to the lower end of the funnel 6 in a milk powder taking process, and an opening 31 is arranged on the side wall 3 corresponding to the limiting device 4.

Furthermore, slots (not shown) are respectively arranged at the two sides of the lower surface of the cover body 1 close to the circular opening 11, two plugs (not shown) corresponding to the slots are arranged at the edge of the funnel 6, and the plugs are detachably inserted into the slots.

Further, a sealing door 32 is provided at the position of the opening 31. The sealing door 32 is arranged, so that the sealing door 32 is only opened in the milk powder selecting process, and the pollution of external bacteria to the milk powder can be better reduced.

Further, the funnel 6 is an inclined funnel, and the bottom end of the inclined funnel is inclined to the opening 31.

Further, a limiting plate 61 is disposed at the bottom end of the hopper 6, and sliding grooves (not shown) are disposed on two side edges of the lower surface of the limiting plate 61. Through limiting plate 61's setting, can improve stop device 4 and to the area of contact of 6 bottoms of funnel, improve sealing performance.

Further, stop device 4 includes fixed plate 41 and closing plate 42, fixed plate 41 is fixed to be set up in the funnel 6 one side of keeping away from opening 31, be provided with socket 43 on the corresponding fixed plate 41 of horizontal plane of funnel 6 bottom, be provided with respectively on the both sides limit of closing plate 42 upper surface with the corresponding first arch (not shown in the figure of spout), first protruding slidable cartridge is in the spout, closing plate 42 slidable cartridge is in socket 43, and the laminating is in the bottom of funnel 6, the closing plate 42 is close to the one end of opening 31 and is provided with the baffle 44 with milk powder spoon surface shape assorted, be provided with first spring 45 between the other end of closing plate 42 and fixed plate 41, be provided with blind hole 46 on the closing plate 42, can dismantle in the blind hole 46 and be provided with gim.

Above-mentioned stop device 4 passes through the setting of baffle 44, can make and getting the milk powder in-process, milk powder spoon and baffle 44 are airtight to be combined, avoid milk powder to leak down between milk powder spoon and baffle, and set up through first spring 45, can make and get milk powder after, at the milk powder spoon withdrawal in-process, closing plate 42 follows the milk powder spoon and removes under first spring 45 effect, realize the sealed to 6 mouths of leakage of funnel, in addition through first arch and spout to the cooperation, can ensure that closing plate 42 and funnel 6 closely laminate.

Further, the distance between the baffle 44 and the opening 31 is minimized to zero during the sliding of the sealing plate 42. Through the setting to above-mentioned characteristic, can clearly confirm baffle 44 position in opening 31 position, getting the milk powder in-process, easily controlling milk powder spoon and baffle 44 combine closely, avoid because milk powder spoon position is inaccurate, cause to produce the gap between milk powder spoon and the baffle 44, cause milk powder to leak from the gap and produce extravagantly.

Further, stop device 4 still includes mild steel plate 47, arc elastic plate 48, be provided with the protruding 49 of second on the fixed plate 41, the protruding 49 of second is in the below of closing plate 42, and the vertical distance with closing plate 42 is less than the height of milk powder spoon, mild steel plate 47 one end is the level setting, the other end is the arc setting, the tip of mild steel plate 47's arc end can be dismantled and fix on base 2, another tip setting is in the below of closing plate 42 and prop up the lower surface at the protruding 49 of second, arc elastic plate 48 sets up the both sides at mild steel plate 47's horizontal end respectively.

According to the invention, an upward force is provided for the horizontal end of the mild steel plate 47 through the rigidity of the arc-shaped end part of the mild steel plate 47, an upward extrusion force can be provided for the milk powder spoon in the milk powder taking process, so that the milk powder spoon is tightly attached to the lower end of the funnel 6, the milk powder is prevented from leaking outwards, and then, through the arrangement of the arc-shaped elastic plate 48, an impact force can be applied to two sides of the milk powder spoon, the stability of the milk powder spoon is ensured, and the milk powder spoon can be prevented from moving left and right.

Further, the arc-shaped elastic plate 48 may be disposed in a manner that: two sides of the horizontal end of the mild steel plate 47 are respectively provided with two spaced fourth protrusions 50, one end of the arc-shaped elastic plate 48 is fixed at the horizontal end of the mild steel plate 47, and the other end of the arc-shaped elastic plate passes through a gap between the two spaced fourth protrusions 50. Through the setting, can make and get the milk powder in-process, when the milk powder spoon removed, to the extrusion force of two arc elastic plates 48 to the outside for arc elastic plate 48 is outside crooked, and provides a reaction force for the milk powder spoon, improves the stability of milk powder spoon.

Further, an insertion hole 21 is provided in the base 2, and the end portion of the mild steel plate 47 on the arc side is inserted into the insertion hole 21.

Further, a third protrusion (not shown) is disposed at the horizontal end of the mild steel plate 47, a vertical groove 51 matched with the third protrusion is disposed on the fixing plate 41, and the vertical groove 51 is disposed below the second protrusion 49. Through the setting of third arch and vertical recess 51, can avoid removing about mild steel plate.

Further, as shown in fig. 2, the limiting device 4 further includes a second spring 52, the second spring 52 is disposed in the vertical groove 51, and one end of the second spring is fixed at the bottom of the third protrusion, and the other end of the second spring is directly abutted to the bottom of the vertical groove 52. Through the setting of second spring 52, assurance mild steel plate 47 that can be better receives an ascending effort, at getting the milk powder in-process, can be better act on the milk powder spoon with the effort through mild steel plate 47 for milk powder spoon and 6 low ends of funnel combine closely, avoid milk powder to leak outward.

Further, a rubber sealing ring (not shown) is arranged on the inner wall of the cover body 1, and the inner diameter of the rubber sealing ring is smaller than the outer diameter of the milk powder tank; through the setting of rubber seal, when the milk powder jar back-off was in lid 1, can realize lid 1 and milk powder jar sealed through rubber seal, reach zonulae occludens.

In an embodiment, the tool further includes a counting device, as shown in fig. 3 and 4, the counting device is disposed in the side wall 3 and located on a side of the sealing plate 42 away from the opening 31, the counting device includes a fixing shaft 71, an elastic rotating device 72, a sleeve 73 and a pushing device 74, two ends of the fixing shaft 71 are fixed on the side wall 3, the sleeve 73 is sleeved on the fixing shaft 71, the elastic rotating device 72 is disposed between the fixing shaft 71 and the sleeve 73, one end of the sleeve 73 is provided with a fourth protrusion 75 at an interval, the fourth protrusion 75 is located below the pushing device 74, the other end of the sleeve 73 is provided with a display plate 76 corresponding to the fourth protrusion 75 at an interval, the display plate 76 is provided with numbers for counting, the side wall 3 corresponding to the display plate 76 is provided with an openable and closable limit door (not shown), an inner surface of the limit door is provided with a fifth protrusion (, thrust unit 74 includes catch plate 77 and separation blade 78, and catch plate 77 one end is provided with bar through-hole 79, and the other end that promotes version 77 is fixed with the tip of closing plate 42, and bar through-hole 79's cross-section is right angle trapezoidal form, and the one side that promotes the adjacent bar through-hole 79 hypotenuse of the lower surface of version 77 is provided with sixth arch 80, and separation blade 78 is the L form, and bar through-hole 79 is worn to locate by vertical end.

According to the technical device, in the milk powder taking process, the pushing plate 77 is driven to move horizontally through the horizontal movement of the sealing plate 42, the blocking piece 78 penetrating through the strip-shaped through hole 79 is further driven to move, the blocking piece 78 can push the fourth protrusion 75 on the sleeve 73 to move, the sleeve 73 is made to rotate, after the sleeve 73 is rotated, the display plate 76 is limited through the fifth protrusion to prevent the sleeve 73 from automatically returning in the withdrawing process of the sealing plate 42, the bottom end of the blocking piece 78 can be guaranteed to incline backwards through the arrangement of the strip-shaped through hole, the blocking piece 78 and the fifth protrusion on the pushing device 4, the blocking of the adjacent fourth protrusion 75 is prevented, the sleeve 73 can be ensured to rotate once through the milk powder taking once, and the milk powder taking quantity is determined through the numbers on the display plate 76; after the sleeve is taken out, the fifth bulge is separated from the display board 76 by opening the limit door, and then the sleeve 73 automatically returns under the action of the elastic rotary device 72.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A tool for taking milk powder for infants is characterized by comprising a cover body, a base, a side wall, a limiting device and a funnel, wherein the side wall is cylindrical and is arranged between the cover body and the base, the cover body can be tightly combined with a milk powder tank, a circular opening is formed in the middle of the cover body, the funnel is detachably mounted below the circular opening, the limiting device is arranged in the side wall and is mounted at the bottom end of the funnel in an attaching mode and used for limiting a milk powder spoon to be tightly attached to the lower end of the funnel in a milk powder taking process, and an opening is formed in the side wall corresponding to the limiting device;

a limiting plate is arranged at the bottom end of the funnel, and sliding grooves are respectively arranged on two side edges of the lower surface of the limiting plate;

the limiting device comprises a fixing plate and a sealing plate, the fixing plate is fixedly arranged on one side of the funnel far away from the opening, a socket is arranged on the fixing plate corresponding to the horizontal plane of the bottom end of the funnel, first bulges corresponding to the sliding grooves are respectively arranged on two side edges of the upper surface of the sealing plate, the first bulges can be slidably inserted into the sliding grooves, the sealing plate can be slidably inserted into the socket and attached to the bottom end of the funnel, a baffle plate matched with the surface shape of the milk powder spoon is arranged at one end, close to the opening, of the sealing plate, a first spring is arranged between the other end of the sealing plate and the fixing plate, a blind hole is formed in the sealing plate, and a fixing bolt is detachably arranged in the blind hole;

stop device still includes mild steel board, arc elastic plate, it is protruding to be provided with the second on the fixed plate, the second is protruding the below of closing plate, and with the vertical distance of closing plate is less than the height of milk powder spoon, mild steel board one end sets up for the level, and the other end sets up for the arc, the tip of mild steel board's arc end can be dismantled and fix on the base, another tip sets up the below of closing plate and prop up and be in the protruding lower surface of second, the arc elastic plate sets up respectively the both sides of mild steel board's horizontal end.

2. The tool of claim 1, wherein the funnel is a sloped funnel, and a bottom end of the sloped funnel slopes toward the open position.

3. The tool of claim 2, wherein the distance between the baffle and the opening is at least zero during sliding of the seal plate.

4. The tool as claimed in claim 3, wherein the horizontal end of the mild steel plate is provided with a third protrusion, and the fixing plate is provided with a vertical groove matched with the third protrusion, and the vertical groove is arranged below the second protrusion.

5. The tool of claim 4, wherein the stop device further comprises a second spring disposed in the vertical groove, and one end of the second spring is fixed to the bottom of the third protrusion, and the other end of the second spring is directly against the bottom of the vertical groove.

6. The tool of claim 1, wherein the inner wall of the cover body is provided with a rubber sealing ring, and the inner diameter of the rubber sealing ring is smaller than the outer diameter of the milk powder tank.

7. The tool according to claim 1, further comprising a counting device, wherein the counting device is disposed in the sidewall and located on a side of the sealing plate away from the opening, the counting device comprises a fixed shaft, an elastic rotating device, a sleeve and a pushing device, two ends of the fixed shaft are fixed on the sidewall, the sleeve is sleeved on the fixed shaft, the elastic rotating device is disposed between the fixed shaft and the sleeve, a fourth protrusion is disposed at an interval at one end of the sleeve, the fourth protrusion is located below the pushing device, a display panel corresponding to the fourth protrusion is disposed at an interval at the other end of the sleeve, the display panel is provided with numbers for counting, a switchable limiting door is disposed on the sidewall corresponding to the display panel, a fifth protrusion is disposed on an inner surface of the limiting door, the fifth bulge is used for limiting the display panel, the pushing device comprises a pushing plate and a blocking piece, a strip-shaped through hole is formed in one end of the pushing plate, the other end of the pushing plate is fixed with the end portion of the sealing plate, the cross section of the strip-shaped through hole is in a right-angle trapezoidal shape, the lower surface of the pushing plate is adjacent to one side of the inclined edge of the strip-shaped through hole, the sixth bulge is arranged on one side of the inclined edge of the strip-shaped through hole, the blocking piece is in an L shape, and the vertical end.