CN210520883U

CN210520883U - Stinking-proof toilet

Info

Publication number: CN210520883U
Application number: CN201920896585.8U
Authority: CN
Inventors: 张吉兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-05-15
Anticipated expiration: 2029-06-14

Abstract

The utility model provides a deodorant toilet bowl belongs to daily life technical field. It has solved the problem that current toilet occupation space and area are many, the just groove does not possess deodorant effect. This deodorant toilet bowl, including the locating surface that is located just groove rear and vertical setting and the bottom plate that is used for covering the notch in just groove, have on the bottom plate with just the opening of the notch in groove just to setting up, open-ended left side articulates there is the apron one that can swing to vertical state by the horizontality, the right side articulates there is the apron two that can swing to vertical state by the horizontality, apron one and apron two completely seal the notch in just groove when being in horizontal state with apron two, it has the seat that can swing to horizontal state and can keep at horizontal state by vertical state to articulate on the locating surface, have on the seat just to the fluting that sets up with the opening. The utility model has the advantages of small occupied space, good deodorization effect and the like.

Description

Stinking-proof toilet

Technical Field

The utility model belongs to the technical field of daily life, a deodorant toilet bowl is related to.

Background

When home-furnishing, people often place a toilet or urinal in a toilet. The water closet has large volume, occupies more space and area, is not suitable for being installed in a small toilet and has small application range; although the toilet bowl occupies a small space, the toilet bowl is in an open state for a long time and does not have a deodorization effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art and providing a deodorant toilet bowl capable of realizing a deodorant effect.

The purpose of the utility model can be realized by the following technical proposal:

the odor-resistant toilet bowl is characterized by comprising a positioning surface which is positioned behind the toilet bowl and is vertically arranged and a bottom plate which is used for covering a notch of the toilet bowl, wherein an opening which is just opposite to the notch of the toilet bowl is arranged on the bottom plate, the left side of the opening is hinged with a first cover plate which can swing from a horizontal state to a vertical state, the right side of the opening is hinged with a second cover plate which can swing from the horizontal state to the vertical state, when the first cover plate and the second cover plate are in the horizontal state, the notch of the toilet bowl is completely sealed by the first cover plate and the second cover plate, the positioning surface is hinged with a seat plate which can swing from the vertical state to the horizontal state and can be kept in the horizontal state, and the seat plate is provided with a notch which.

The bottom plate is directly fixed on the floor of the toilet and is in sealing fit with the floor of the toilet. When the device is used, the first cover plate and the second cover plate are opened, so that the first cover plate and the second cover plate swing to a vertical state from a horizontal state; wrenching the seat plate to make the seat plate swing to the horizontal state from the vertical state, the notch of fluting, opening and just groove sets gradually and switches on from top to bottom this moment. After the toilet seat is used, the seat plate is pulled to be in a vertical state, the first cover plate and the second cover plate are pulled to be in a horizontal state after the toilet seat is washed, the opening of the first cover plate and the opening of the second cover plate are completely sealed, and odor or backflow odor in the opening of the excrement groove is prevented from being scattered into a toilet. Because the seat plate can swing, the seat plate is arranged close to the positioning surface when not in use, and the occupied space is small.

In foretell deodorant toilet bowl, the open-ended left and right sides is the straight flange that extends along the fore-and-aft direction respectively, the opening in be equipped with both ends wear to establish respectively in the bottom plate and be close to the pivot one that the left side set up and the pivot two that is close to the right side setting, pivot one and pivot two extend along the fore-and-aft direction, foretell apron one set is established on pivot one, the apron two sets are established on pivot two.

The first cover plate and the second cover plate are symmetrically arranged, and when the first cover plate and the second cover plate are in a horizontal state, the shape formed by the first cover plate and the second cover plate is the same as the shape of the opening. The first rotating shaft can be a long shaft and directly penetrates through the first cover plate, and can also be two coaxially arranged half shafts which are respectively arranged at the front end and the rear end of the first cover plate. The second rotating shaft can be a long shaft and directly penetrates through the second cover plate, or can be two coaxially arranged half shafts which are respectively arranged at the front end and the rear end of the second cover plate.

In the above deodorizing toilet, the left and right width of the opening is greater than the left and right width of the notch of the toilet bowl, the front and rear length of the opening is greater than the front and rear length of the notch of the toilet bowl, the distance from the first rotating shaft to the second rotating shaft is greater than the left and right width of the notch of the toilet bowl, the lower surface of the first cover plate abuts against the upper surface of the toilet bowl when the first cover plate rotates to the horizontal state, and the lower surface of the second cover plate abuts against the upper surface of the toilet bowl when the second cover plate rotates to the horizontal state.

In the deodorizing toilet bowl, the toilet groove is provided with the first sealing strip around the opening of the toilet groove, when the first cover plate rotates to the horizontal state, the lower surface of the first cover plate is attached to the first sealing strip, and when the second cover plate rotates to the horizontal state, the lower surface of the second cover plate is attached to the first sealing strip. The first sealing strip is annular.

In the deodorant toilet bowl, a second sealing strip is arranged between the first cover plate and the second cover plate, when the first cover plate and the second cover plate are in a horizontal state, the right side of the first cover plate abuts against the second sealing strip, and the left side of the second cover plate abuts against the second sealing strip. The second sealing strip can be arranged on the first cover plate according to the actual use condition; or the second sealing strip is arranged on the second cover plate; or two sealing strips II are respectively arranged on the first cover plate and the second cover plate. The length of the second sealing strip is larger than or equal to the length of the notch of the excrement groove in the front-back direction.

In the deodorizing toilet bowl, a first traction structure is arranged between the seat plate and the first cover plate, and when the seat plate rotates from a vertical state to a horizontal state, the first traction structure pulls the first cover plate in the horizontal state to the vertical state; and a second traction structure is arranged between the seat plate and the second cover plate, and when the seat plate rotates from a vertical state to a horizontal state, the second traction structure pulls the second cover plate in the horizontal state to the vertical state.

In foretell deodorant toilet bowl, draw structure one including fix the seat lower part with the perpendicular draw bar one that sets up of the rotation central line of seat, locate the leading wheel one on the locating surface and fix the stay cord one of keeping away from seat one end at the draw bar one, stay cord one link firmly with apron one after bypassing leading wheel one, the lower part of locating surface has the chamber of stepping down, when the seat swung to the horizontality draw bar one stretch into the intracavity of stepping down.

When the seat board is in a vertical state, the distance between one end of the first traction rod, which is far away from the seat board, and the first guide wheel is L1, and when the seat board is in a horizontal state, the distance between one end of the first traction rod, which is far away from the seat board, and the first guide wheel is L2, and L2 is greater than L1. The guide wheel one is positioned on the left side of the abdicating cavity.

In the above deodorizing toilet, the second traction structure comprises a second traction rod fixed on the lower part of the seat plate and perpendicular to the rotation center line of the seat plate, a second guide wheel arranged on the positioning surface and a second pull rope fixed at one end of the second traction rod far away from the seat plate, the second pull rope is fixedly connected with the second cover plate after bypassing the second guide wheel, and the second traction rod extends into the yielding cavity when the seat plate swings to the horizontal state. The guide wheel II is positioned on the right side of the abdicating cavity. The depth of the first guide wheel and the second guide wheel is enough to prevent the first pull rope and the second pull rope from falling off.

The traction rod II and the traction rod I are symmetrically arranged, the guide wheel II and the guide wheel are symmetrically arranged, and the fixed point of the pull rope I and the fixed point of the cover plate I and the fixed point of the pull rope II and the cover plate II are symmetrically arranged. When the seat board is in a vertical state, the distance between one end of the second traction rod, which is far away from the seat board, and the second guide wheel is L3, and when the seat board is in a horizontal state, the distance between one end of the second traction rod, which is far away from the seat board, and the second guide wheel is L4, and L4 is greater than L3.

In the deodorant toilet bowl, the first cover plate is fixed with the first support rod, the first support rod is provided with the first return spring connected with the bottom plate, the second cover plate is fixed with the second support rod, and the second support rod is provided with the second return spring connected with the bottom plate.

The first reset spring has the trend of always enabling the first cover plate to be in the sealing opening, and the second reset spring has the trend of always enabling the second cover plate to be in the sealing opening. The first support rod and the second support rod are symmetrically arranged, and the first return spring and the second return spring are symmetrically arranged.

The seat board is U-shaped, and its front end is equipped with the hand (hold) of being convenient for to hold, and the hand (hold) can conveniently be switched the seat board from the horizontality to vertical state or from vertical state to the horizontality. When the seat plate is in a vertical state, in order to prevent the seat plate from overturning, an elastic buckle can be arranged on the positioning surface and used for fixing a handle on the seat plate.

Compared with the prior art, the deodorization toilet bowl has the following advantages:

the excrement groove is completely covered by the bottom plate, and the notch of the excrement groove is covered by the first cover plate and the second cover plate, so that odor in the notch of the excrement groove is effectively prevented from entering a room, and the odor-resistant effect is good; the seat plate is hinged on the positioning surface, so that the occupied space can be effectively saved when the seat plate is not used, the seat plate is favorable for being used in a small toilet, and the application range is wide; the cover plate I and the cover plate II can be opened and closed simultaneously by pulling the seat plate, and the operation is convenient.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a usage status diagram of the preferred embodiment of the present invention.

Fig. 3 is a cross-sectional view of the bottom plate of the preferred embodiment of the present invention.

In the figure, a excrement groove; b. a notch; 1. positioning the surface; 2. a base plate; 3. a first cover plate; 4. a second cover plate; 5. a seat plate; 6. a first rotating shaft; 7. a second rotating shaft; 8. a first traction rod; 9. a first guide wheel; 10. pulling a first rope; 11. a yielding cavity; 12. a second draw bar; 13. a second guide wheel; 14. a second pull rope; 15. a first support rod; 16. a first return spring; 17. a handle; 18. an elastic buckle.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The deodorizing toilet bowl as shown in fig. 1 comprises a positioning surface 1 which is positioned at the rear part of a toilet bowl a and is vertically arranged and a bottom plate 2 which is used for covering a notch b of the toilet bowl a, wherein the bottom plate 2 is directly fixed on the floor of a toilet, and the bottom plate 2 is in sealing fit with the floor of the toilet. The positioning surface 1 is a wall surface of a toilet; or a backup plate is fixed on the bottom plate 2, and the positioning surface 1 is the front side surface of the backup plate.

The bottom plate 2 is provided with an opening opposite to the notch b of the toilet bowl a, as shown in fig. 1-3, the left side of the opening is hinged with a first cover plate 3 capable of swinging from a horizontal state to a vertical state, the right side of the opening is hinged with a second cover plate 4 capable of swinging from the horizontal state to the vertical state, when the first cover plate 3 and the second cover plate 4 are in the horizontal state, the first cover plate 3 and the second cover plate 4 completely seal the notch b of the toilet bowl a, as shown in fig. 1-2, the positioning surface 1 is hinged with a seat plate 5 capable of swinging from the vertical state to the horizontal state and keeping in the horizontal state, and the seat plate 5 is provided with a notch opposite to the opening.

The seat plate 5 in this embodiment is U-shaped, and the front end of the seat plate is provided with a handle 17 which is convenient to hold, and the handle 17 can be used for conveniently switching the seat plate 5 from a horizontal state to a vertical state or from the vertical state to the horizontal state. When the seat plate 5 is in the vertical state, in order to prevent the seat plate 5 from turning over, an elastic buckle 18 can be arranged on the positioning surface 1 for fixing a handle 17 on the seat plate 5.

In the structural state, when in use, the first cover plate 3 and the second cover plate 4 are opened, so that the first cover plate 3 and the second cover plate 4 swing to a vertical state from a horizontal state; wrenching seat 5, making seat 5 swing to the horizontality by vertical state, the notch b of fluting, opening and just groove a from top to bottom sets gradually and switches on this moment.

After the toilet seat is used, the seat plate 5 is pulled to be in a vertical state, the cover plate I3 and the cover plate II 4 are pulled to be in a horizontal state after the toilet seat is washed, the opening of the cover plate I3 and the opening of the cover plate II 4 are completely sealed, and odor bred in the notch b of the excrement tank a or backflow odor is prevented from being scattered into a toilet.

As shown in fig. 1 and 2, the left and right sides of the opening are straight edges extending in the front-back direction, as shown in fig. 3, a first rotating shaft 6 and a second rotating shaft 7 are arranged in the opening, wherein the two ends of the first rotating shaft 6 are respectively arranged in the bottom plate 2 in a penetrating manner and are close to the left side, the two rotating shafts 7 are arranged close to the right side, the first rotating shaft 6 and the second rotating shaft 7 extend in the front-back direction, the first cover plate 3 is sleeved on the first rotating shaft 6, and the second cover plate 4 is sleeved. The first cover plate 3 and the second cover plate 4 are symmetrically arranged, and when the first cover plate 3 and the second cover plate 4 are in a horizontal state, the shape formed by the first cover plate 3 and the second cover plate 4 is the same as the shape of the opening. The first rotating shaft 6 can be a long shaft and directly penetrates through the first cover plate 3, or can be two coaxially arranged half shafts which are respectively arranged at the front end and the rear end of the first cover plate 3. The second rotating shaft 7 can be a long shaft and directly penetrates through the second cover plate 4, or can be two coaxially arranged half shafts which are respectively arranged at the front end and the rear end of the second cover plate 4.

The left and right width of the opening is greater than the left and right width of the notch b of the excrement tank a, the front and back length of the opening is greater than the front and back length of the notch b of the excrement tank a, the distance from the first rotating shaft 6 to the second rotating shaft 7 is greater than the left and right width of the notch b of the excrement tank a, the lower surface of the first cover plate 3 abuts against the upper surface of the excrement tank a when the first cover plate 3 rotates to be in a horizontal state, and the lower surface of the second cover plate 4 abuts against the upper surface of the excrement tank a when the second cover plate 4 rotates to be in a horizontal state.

In order to achieve a better deodorization effect, a first annular sealing strip (not shown in the figure) is arranged on the toilet groove a and surrounds the notch b of the toilet groove a, the lower surface of the first cover plate 3 abuts against the first annular sealing strip when the first cover plate 3 rotates to be in a horizontal state, and the lower surface of the second cover plate 4 abuts against the first annular sealing strip when the second cover plate 4 rotates to be in a horizontal state.

And a second sealing strip is arranged between the first cover plate 3 and the second cover plate 4, when the first cover plate 3 and the second cover plate 4 are in a horizontal state, the right side of the first cover plate 3 abuts against the second sealing strip, and the left side of the second cover plate 4 abuts against the second sealing strip. The second sealing strip can be arranged on the first cover plate 3 according to the actual use condition; or the second sealing strip is arranged on the second cover plate 4; or two sealing strips II are respectively arranged on the first cover plate 3 and the second cover plate 4. The length of the second sealing strip is greater than or equal to the length of the notch b of the excrement groove a in the front-back direction.

In this embodiment, a first traction structure is arranged between the seat plate 5 and the first cover plate 3, and the first traction structure pulls the first cover plate 3 in the horizontal state to the vertical state when the seat plate 5 rotates from the vertical state to the horizontal state. Specifically, as shown in fig. 1 and 2, the traction structure includes a first traction rod 8 fixed on the lower portion of the seat 5 and perpendicular to the rotation center line of the seat 5, a first guide wheel 9 arranged on the positioning surface 1, and a first pull rope 10 fixed on one end of the first traction rod 8 far away from the seat 5, the first pull rope 10 is fixedly connected with the first cover plate 3 after bypassing the first guide wheel 9, the lower portion of the positioning surface 1 is provided with a yielding cavity 11, and the first traction rod 8 extends into the yielding cavity 11 when the seat 5 swings to a horizontal state. When the locating surface 1 is a wall surface, the abdicating cavity 11 can be directly chiseled at the corresponding position of the wall surface. When the locating surface 1 is the front side of the backup plate fixed on the bottom plate 2, the lower part of the backup plate can be directly hollowed out to form the abdicating cavity 11. The depth of the abdicating cavity 11 should be such that it is completely submerged in the first tow bar 8.

When the seat plate 5 is in the vertical state, the distance between one end of the first traction rod 8 far away from the seat plate 5 and the first guide wheel 9 is L1, and when the seat plate 5 is in the horizontal state, the distance between one end of the first traction rod 8 far away from the seat plate 5 and the first guide wheel 9 is L2, and L2 is greater than L1. The first guide wheel 9 is positioned on the left side of the abdicating cavity 11.

A second traction structure is arranged between the seat plate 5 and the second cover plate 4, and the second traction structure is used for drawing the second cover plate 4 in the horizontal state to the vertical state when the seat plate 5 rotates to the horizontal state from the vertical state. As shown in fig. 1 and 2, the second traction structure comprises a second traction rod 12 fixed at the lower part of the seat plate 5 and arranged perpendicular to the rotation center line of the seat plate 5, a second guide wheel 13 arranged on the positioning surface 1, and a second pull rope 14 fixed at one end of the second traction rod 12 far away from the seat plate 5, wherein the second pull rope 14 is fixedly connected with the second cover plate 4 after bypassing the second guide wheel 13, and the second traction rod 12 extends into the abdicating cavity 11 when the seat plate 5 swings to the horizontal state. The second guide wheel 13 is positioned on the right side of the abdicating cavity 11.

The second traction rod 12 and the first traction rod 8 are symmetrically arranged, the second guide wheel 13 and the first guide wheel 9 are symmetrically arranged, and the fixed point of the first pull rope 10 and the first cover plate 3 and the fixed point of the second pull rope 14 and the second cover plate 4 are symmetrically arranged. When the seat board 5 is in the vertical state, the distance between one end of the second traction rod 12 far away from the seat board 5 and the second guide wheel 13 is L3, and when the seat board 5 is in the horizontal state, the distance between one end of the second traction rod 12 far away from the seat board 5 and the second guide wheel 13 is L4, and L4 is greater than L3.

As shown in fig. 1, a first support rod 15 is fixed on the first cover plate 3, a first return spring 16 connected with the bottom plate 2 is arranged on the first support rod 15, a second support rod is fixed on the second cover plate 4, and a second return spring connected with the bottom plate 2 is arranged on the second support rod. The first return spring 16 has a tendency to always place the first cover plate 3 in a sealed opening, and the second return spring has a tendency to always place the second cover plate 4 in a sealed opening. The first support rod 15 and the second support rod are symmetrically arranged, and the first return spring 16 and the second return spring are symmetrically arranged.

Under the normal state, apron one 3 and apron two 4 are the closed condition, with the opening totally closed, and the seat 5 is vertical state this moment. When the seat plate is used, the seat plate 5 is pulled to move to the horizontal state, the first cover plate 3 and the second cover plate 4 are pulled up under the action of the first pull rope 10 and the second pull rope 14 respectively, when the seat plate 5 moves to the horizontal state completely, the first cover plate 3 and the second cover plate 4 are in the vertical state, and at the moment, the first cover plate 3 and the second cover plate 4 support the seat plate 5. After the use, the seat plate 5 is pulled to move to a vertical state, the first cover plate 3 is reset under the action of the first return spring 16, and the second cover plate 4 is reset under the action of the second return spring to seal the opening.

After the toilet bowl is used, the toilet bowl a can be flushed by adopting a manual water scooping mode; meanwhile, a flushing pipe can be arranged along the wall surface, and flushing can be realized by opening the flushing pipe; the flushing tank can also be arranged at the rear part of the bottom plate 2, and the positioning surface 1 is the front side surface of the flushing tank.

The structure can be directly applied to the toilet groove which is installed in the toilet.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A deodorization toilet bowl is characterized by comprising a positioning surface (1) which is positioned behind a toilet bowl (a) and is vertically arranged and a bottom plate (2) which is used for covering a notch (b) of the toilet bowl (a), the bottom plate (2) is provided with an opening which is arranged opposite to the notch (b) of the excrement groove (a), the left side of the opening is hinged with a first cover plate (3) which can swing from a horizontal state to a vertical state, the right side of the opening is hinged with a second cover plate (4) which can swing from the horizontal state to the vertical state, when the first cover plate (3) and the second cover plate (4) are in a horizontal state, the first cover plate (3) and the second cover plate (4) completely seal the notch (b) of the excrement groove (a), the seat plate (5) which can swing from a vertical state to a horizontal state and can be kept in the horizontal state is hinged to the positioning surface (1), and a groove which is arranged opposite to the opening is formed in the seat plate (5).

2. The odor-resistant toilet bowl according to claim 1, characterized in that the left and right sides of the opening are straight sides extending in the front-rear direction, respectively, a first rotating shaft (6) and a second rotating shaft (7) are provided in the opening, both ends of the first rotating shaft (6) and the second rotating shaft (7) are respectively arranged in the bottom plate in a penetrating manner and are arranged near the left side, the first rotating shaft (6) and the second rotating shaft (7) extend in the front-rear direction, the first cover plate (3) is sleeved on the first rotating shaft (6), and the second cover plate (4) is sleeved on the second rotating shaft (7).

3. The odor-resistant toilet bowl according to claim 2, characterized in that the left-right width of the opening is larger than the left-right width of the notch (b) of the toilet bowl (a), the front-back length of the opening is larger than the front-back length of the notch (b) of the toilet bowl (a), the distance from the first rotating shaft (6) to the second rotating shaft (7) is larger than the left-right width of the notch (b) of the toilet bowl (a), the lower surface of the first cover plate (3) abuts against the upper surface of the toilet bowl (a) when the first cover plate (3) rotates to the horizontal state, and the lower surface of the second cover plate (4) abuts against the upper surface of the toilet bowl (a) when the second cover plate (4) rotates to the horizontal state.

4. The odor-resistant toilet bowl according to claim 3, characterized in that the notch (b) of the toilet bowl (a) surrounding the toilet bowl (a) is provided with a first sealing strip (3), the lower surface of the first cover plate (3) abuts against the first sealing strip (3) when the first cover plate (3) rotates to the horizontal state, and the lower surface of the second cover plate (4) abuts against the first sealing strip (4) when the second cover plate (4) rotates to the horizontal state.

5. The odor-resistant toilet bowl according to claim 4, characterized in that a second sealing strip is arranged between the first cover plate (3) and the second cover plate (4), when the first cover plate (3) and the second cover plate (4) are in a horizontal state, the right side of the first cover plate (3) abuts against the second sealing strip, and the left side of the second cover plate (4) abuts against the second sealing strip.

6. The odor-resistant toilet bowl according to claim 1, 2, 3, 4 or 5, characterized in that a first traction structure is arranged between the seat plate (5) and the first cover plate (3), and the first traction structure pulls the first cover plate (3) in the horizontal state to the vertical state when the seat plate (5) rotates from the vertical state to the horizontal state; a second traction structure is arranged between the seat plate (5) and the second cover plate (4), and the second traction structure pulls the second cover plate (4) in the horizontal state to the vertical state when the seat plate (5) rotates to the horizontal state from the vertical state.

7. The odor-resistant toilet bowl according to claim 6, characterized in that the traction structure comprises a first traction rod (8) fixed at the lower part of the seat (5) and arranged perpendicular to the rotation center line of the seat (5), a first guide wheel (9) arranged on the positioning surface (1), and a first draw rope (10) fixed at one end of the first traction rod (8) far away from the seat (5), wherein the first draw rope (10) is fixedly connected with the first cover plate (3) after bypassing the first guide wheel (9), the lower part of the positioning surface (1) is provided with a yielding cavity (11), and when the seat (5) swings to a horizontal state, the first traction rod (8) extends into the yielding cavity (11).

8. The odor-resistant toilet bowl according to claim 7, characterized in that the traction structure comprises a second traction rod (12) fixed at the lower part of the seat plate (5) and arranged perpendicular to the rotation centerline of the seat plate (5), a second guide wheel (13) arranged on the positioning surface (1), and a second draw rope (14) fixed at one end of the second traction rod (12) far away from the seat plate (5), wherein the second draw rope (14) is fixedly connected with the second cover plate (4) after bypassing the second guide wheel (13), and the second traction rod (12) extends into the abdicating cavity (11) when the seat plate (5) swings to the horizontal state.

9. The odor-resistant toilet bowl according to claim 8, characterized in that a first support rod (15) is fixed on the first cover plate (3), a first return spring (16) connected with the bottom plate (2) is arranged on the first support rod (15), a second support rod is fixed on the second cover plate (4), and a second return spring connected with the bottom plate (2) is arranged on the second support rod.