Diaphragm and valve block integrated water toothpick and diaphragm and valve block thereof

Abstract

The utility model relates to a diaphragm membrane and valve plate integrated water toothpick and a diaphragm valve plate thereof, the water toothpick comprises the diaphragm valve plate, the diaphragm valve plate comprises a diaphragm membrane, a valve plate and a connecting part, and the diaphragm membrane and the valve plate are connected into a whole through the connecting part. According to the water toothpick, the assembly cost, the management cost and the manufacturing cost of parts are reduced, and the water toothpick has the advantage of low cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to oral cavity cleaning technical field, especially tooth washer, especially be used to the diaphragm membrane piece on tooth washer.

BACKGROUND

[0002] With the increasing living standards, the traditional toothbrush is inefficient, therefore, the tooth washer is used to clean the teeth, the principle is that the liquid storage cavity is arranged in the shell of the tooth washer, the diaphragm membrane piece and the driving assembly are arranged in the liquid storage cavity, the diaphragm membrane piece is driven to reciprocate by the driving assembly, the water flow is sucked into the liquid storage cavity by the pressure generated by the reciprocation, and the water flow is flushed out from the water outlet to the oral cavity of the user, so that the oral cavity of the user is cleaned.

[0003] The liquid storage cavity of the tooth washer generally comprises two cavities, a first cavity and a second cavity, the two cavities form dynamic cooperation, the first cavity is a water inlet, that is, a water suction cavity, and the second cavity is a water outlet, that is, a water pressure generating cavity; the two cavities are divided into two sealed cavities by the opening and closing of two valve pieces; the first cavity, the tooth washer of the prior art generally uses two parts of the diaphragm membrane piece and the valve piece to complete, and then the pump body and the adapter are assembled together to form the first cavity of the tooth washer; the structure and material of the diaphragm membrane piece and the valve piece need to withstand high-frequency reciprocating opening and closing actions, and need to have requirements of repeated bending and resilience strength; due to the structure, the valve piece of the prior art is generally made of iron fluoride or gold paper, and the diaphragm membrane piece is generally made of soft rubber material. The diaphragm membrane piece and the valve piece of the tooth washer have the following disadvantages: multiple parts, one more station is needed during assembly, high assembly cost, more trouble for incoming inspection and warehouse management, high labor management cost, two sets of molds are needed for the diaphragm membrane piece and the valve piece, the manufacturing cost is relatively high, and the material cost of the diaphragm membrane piece and the valve piece is also not low.

UTILITARY MODEL CONTENT

[0004] The utility model provides a diaphragm membrane piece and valve piece integrated tooth washer and diaphragm valve piece to avoid the above-mentioned disadvantages of the prior art, the diaphragm membrane piece and the valve piece are made into an integrated diaphragm valve piece, and are made of soft rubber material, which reduces the assembly cost, the management cost and the manufacturing cost of the parts themselves, and has the advantages of low cost.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] A dental irrigator integrating a diaphragm and valve is provided, comprising a pump body with a transition cavity, an adapter with a first cavity, a connecting rod with a connector at the top, and a main support. The main support has a main mounting cavity and a secondary mounting cavity. The dental irrigator further includes a diaphragm valve, which includes a diaphragm and a valve, and a connecting portion that integrates the diaphragm and the valve. The upper part of the main support has a first notch that connects the upper part of the main mounting cavity and the upper part of the secondary mounting cavity. The diaphragm valve is located between the main support and the pump body, sealing the pump body onto the main support. The diaphragm of the diaphragm valve is located on the main mounting cavity of the main support, allowing the pump body and the main support to... The main mounting cavity is sealed, and the valve plate of the diaphragm valve is located on the adapter provided on the secondary mounting cavity of the main body bracket, so that the pump body and the secondary mounting cavity of the main body bracket are sealed. The connecting part of the diaphragm valve is located at the first gap between the upper part of the main mounting cavity and the upper part of the secondary mounting cavity of the main body bracket, so that the pump body and the first gap of the main body bracket are sealed. The connecting rod is located in the main mounting cavity of the main body bracket, and the connecting head of the connecting rod is connected to the diaphragm of the diaphragm valve. The adapter is provided on the secondary mounting cavity of the main body bracket, and the upper outlet of the first cavity of the adapter can be sealed or opened by the valve plate of the diaphragm valve, so that the first cavity of the adapter is isolated from or connected to the transition cavity of the pump body.

[0007] The valve plate includes a circular main body, a cylindrical portion located in the middle of the circular main body, and two elastic walls connecting the inner circumferential surface of the circular main body and the outer circumferential surface of the cylindrical portion. Two arc-shaped through holes are formed between the two elastic walls, the outer circumferential surface of the cylindrical portion, and the inner circumferential surface of the circular main body. The upper outlet edge of the first cavity of the adapter has two arc-shaped protrusions, and two second notches are between the two arc-shaped protrusions. The two arc-shaped protrusions of the adapter are inserted into the two arc-shaped through holes of the valve plate. The two elastic walls of the valve plate are located at the two second notches of the adapter. The cylindrical portion of the valve plate can seal or open the upper outlet of the first cavity of the adapter.

[0008] The bottom surface of the elastic wall is lower than the bottom surface of the cylindrical part.

[0009] The diaphragm is cap-shaped, including a protruding head and a bottom; the connecting head of the connecting rod is connected to the head of the diaphragm of the diaphragm valve plate.

[0010] The bottom of the diaphragm sheet has an upper locking protrusion and a lower locking protrusion; correspondingly, the pump body has a first groove that matches the upper locking protrusion of the diaphragm sheet, and the upper part of the main mounting cavity of the main body bracket has a second groove that matches the lower locking protrusion of the diaphragm sheet.

[0011] The utility model discloses still provide a diaphragm valve piece for on the tooth washer, diaphragm valve piece includes diaphragm membrane piece and valve piece, and the connecting portion of the diaphragm membrane piece and valve piece is connected into an organic whole.

[0012] Compared with the prior art, the diaphragm membrane piece and valve piece integrated tooth washer and diaphragm valve piece of the utility model have the beneficial effects that:

[0013] First, the diaphragm membrane piece and valve piece of the utility model are connected together by the connecting portion to form an integrated diaphragm valve piece, and the valve piece is made of soft rubber material, which reduces the assembly cost, management cost and manufacturing cost of the parts themselves, and has the advantage of low cost.

[0014] Second, the valve piece is designed as a circular main body, a cylindrical part located in the middle of the circular main body, and two elastic walls connecting the inner circumferential surface of the circular main body and the outer circumferential surface of the cylindrical part, and two arc-shaped through holes are formed between the two elastic walls, the outer circumferential surface of the cylindrical part and the inner circumferential surface of the circular main body. This structure enables the valve piece made of soft rubber material to complete high-frequency reciprocating motion and prolongs the service life of the valve piece.

[0015] Third, after the diaphragm membrane piece and valve piece are connected together, the connecting portion of the diaphragm valve piece has at least four functions: first, it serves as a connecting function, i.e., connecting the diaphragm membrane piece and valve piece into an organic whole; second, it serves as a fulcrum, i.e., after the connecting portion of the diaphragm valve piece is pressed by the pump body between the first gap between the upper part of the main installation cavity and the upper part of the auxiliary installation cavity of the main support, the valve piece moves up and down with the connecting portion as the fulcrum; third, it serves as a restoring function, i.e., when the valve piece moves upward, it has the function of restoring the valve piece to move downward; fourth, it serves as a sealing function, i.e., after the connecting portion of the diaphragm valve piece is pressed by the pump body between the first gap between the upper part of the main installation cavity and the upper part of the auxiliary installation cavity of the main support, it seals the first gap.

[0016] Fourth, in order to achieve better sealing effect and ensure that the cylindrical part of the valve piece completes high-frequency reciprocating motion, the lower bottom surface of the elastic wall is designed to be lower than the lower bottom surface of the cylindrical part.

DRAWINGS

[0017] Figure 1 is the isometric projection schematic diagram of the diaphragm membrane piece and valve piece integrated tooth washer of the utility model after the decomposition of most of the parts;

[0018] Figure 2 is the front projection main view schematic diagram of the nozzle silica gel, pump body, diaphragm valve piece, adapter, connecting rod, main support and front support of the tooth washer assembled together;

[0019] Figure 3is the axonometric projection schematic diagram of the pump body, diaphragm valve sheet, adapter and connecting rod of the tooth washer after being exploded of the tooth washer;

[0020] Figure 4 is the front view schematic diagram of the pump body, diaphragm valve sheet, adapter and connecting rod of the tooth washer after being assembled of the tooth washer;

[0021] Figure 5 is the axonometric projection schematic diagram of one direction of the diaphragm valve sheet of the utility model;

[0022] Figure 6 is the axonometric projection schematic diagram of another direction of the diaphragm valve sheet;

[0023] Figure 7 is the axonometric projection schematic diagram of the main body support;

[0024] Figure 8 is the axonometric projection schematic diagram of the connecting rod;

[0025] Figure 9 is the axonometric projection schematic diagram of the adapter. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in combination with each drawing.

[0027] Referring to Figures 1 to 9The utility model provides a diaphragm and valve integrated tooth washer, including the pump body 5 with transition cavity 59, the adapter 7 with first cavity 79, the connecting rod 8 with the upper part of connector 89 and main body support 11, and the main body support 11 is equipped with main installation cavity 119 and auxiliary installation cavity 118, the diaphragm and valve integrated tooth washer further includes diaphragm valve piece 6, diaphragm valve piece 6 generally adopts soft glue material to be made, diaphragm valve piece 6 includes diaphragm membrane piece 61 and valve piece 62, and the connecting portion 63 of the integration of diaphragm membrane piece 61 and valve piece 62 is coupled, the upper part of main body support 11 is equipped with the first gap 117 of the intercommunication between the upper part of main installation cavity 119 and the upper part of auxiliary installation cavity 118, diaphragm valve piece 6 is located between main body support 11 and pump body 5, makes pump body 5 sealed fixed on main body support 11, wherein the diaphragm membrane piece 61 of diaphragm valve piece 6 is located on the main installation cavity 119 of main body support 11, makes pump body 5 with the sealing of main installation cavity 119 of main body support 11, the valve piece 62 of diaphragm valve piece 6 is located on the upper surface of adapter 7 on the auxiliary installation cavity 118 of main body support 11, makes pump body 5 with the sealing of auxiliary installation cavity 118 of main body support 11, and the connecting portion 63 of diaphragm valve piece 6 is located at the first gap 117 between the upper part of main installation cavity 119 and the upper part of auxiliary installation cavity 118 of main body support 11, makes pump body 5 with the sealing of first gap 117 of main body support 11, connecting rod 8 is located in the main installation cavity 119 of main body support 11, and the connector 89 of connecting rod 8 is connected with the diaphragm membrane piece 61 of diaphragm valve piece 6, adapter 7 is arranged on the auxiliary installation cavity 118 of main body support 11, and the upper outlet of first cavity 79 of adapter 7 can be closed or opened by valve piece 62 of diaphragm valve piece 6, makes first cavity 79 of adapter 7 with the transition cavity 59 of pump body 5 is isolated or communicated, one end of connecting portion 63 is connected with the outer circumferential surface of diaphragm membrane piece 61, and the other end is connected with the outer circumferential surface of valve piece 62, and the whole diaphragm valve piece 6 can adopt one-time molding by mould.

[0028] Figure 1The utility model discloses a diaphragm valve piece integrated tooth washer of most part component decomposition after the axial projection schematic drawing of diaphragm washer, the figure is the nozzle that the mark is 1, the mark is 2 is nozzle support, the mark is 3 is nozzle silica gel, the mark is 4 is first screw, the mark is 9 is hose, the mark is 10 is motor, the mark is 12 is second screw, the mark is 13 is battery, the mark is 14 is big gear, the mark is 15 is front support, the mark is 16 is control circuit board subassembly, the mark is 17 is water inlet support, the nozzle 1 is sealed and is inserted into the second cavity 39 of nozzle silica gel 3, and the nozzle silica gel 3 is sealed and is installed in the upper installation cavity 58 of pump body 5, and the upper installation cavity 58 of pump body 5 is connected with transition cavity 59 by the middle inner through hole 57, and pump body 5 and main support 11 are sealed and are fixed together by first screw 4 and by means of diaphragm valve piece 6, and the upper portion of hose 9 is connected with adapter 7, and the lower portion of hose 9 is connected with water inlet support 17, and water inlet support 17 is connected with water tank (not drawn), and front support 15 and main support 11 are fixed together by second screw 12, and control circuit board subassembly 16 is fixed on front support 15 by screw, and motor 10 and big gear 14 are installed in the internal space formed by front support 15 and main support 11, and the pinion on motor 10 is engaged with big gear 14, and the eccentric structure on big gear 14 is connected with the lower portion of connecting rod 8, and battery 13 is arranged on main support 11, and the battery 13 is electrically connected with control circuit board subassembly 16, and motor 10 is electrically connected with control circuit board subassembly 16. Their structure and assembly relation are mostly prior art, and will not be detailed here.

[0029] Referring to Figures 1 to 7 and Figure 9, in order to make the valve piece 62 made of soft rubber material complete high frequency reciprocating motion, the valve piece 62 includes a circular ring type circle body 621, a cylindrical part 622 located in the middle of the circle body 621, and two elastic walls 623 connecting the inner circumferential surface of the circle body 621 and the outer circumferential surface of the cylindrical part 622, and two arc-shaped through holes 624 are formed between the two elastic walls 623, the outer circumferential surface of the cylindrical part 622 and the inner circumferential surface of the circle body 621; the upper outlet edge of the first cavity 79 of the adapter 7 is provided with two arc-shaped protrusions 78, and two second notches 77 are formed between the two arc-shaped protrusions 78; the two arc-shaped protrusions 78 of the adapter 7 are inserted into the two arc-shaped through holes 624 of the valve piece 62, the two elastic walls 623 of the valve piece 62 are located at the two second notches 77 of the adapter 7, and the cylindrical part 622 of the valve piece 62 can seal or open the upper outlet of the first cavity 79 of the adapter 7. The two elastic walls 623 of the valve piece 62 assist and ensure the cylindrical part 622 of the valve piece 62 to complete high frequency reciprocating motion, and can prolong the service life of the valve piece 62. The circle body 621 has at least three functions: first, it plays a sealing role, the circle body 621 of the valve piece 62 of the diaphragm valve piece 6 is located on the upper surface of the adapter 7 arranged on the auxiliary mounting cavity 118 of the body support 11, so that the pump body 5 and the auxiliary mounting cavity 118 of the body support 11 are sealed; second, it plays a fulcrum role, after the circle body 621 of the valve piece 62 of the diaphragm valve piece 6 is pressed on the upper surface of the adapter 7 arranged on the auxiliary mounting cavity 118 of the body support 11 by the pump body 5, the two elastic walls 623 and the cylindrical part 622 of the valve piece 62 are used as a fulcrum to reciprocate up and down; third, it plays a restoring role, when the cylindrical part 622 of the valve piece 62 moves upward, it has the function of making the cylindrical part 622 of the valve piece 62 move downward to restore.

[0030] Referring to Figure 6 , in order to make the sealing effect better and more capable of ensuring that the cylindrical part 622 of the valve piece 62 completes high frequency reciprocating motion, the lower bottom surface 6231 of the elastic wall 623 is lower than the lower bottom surface 6221 of the cylindrical part 622, generally, the upper bottom surface of the elastic wall 623 is flush with the upper bottom surface of the cylindrical part 622, or the upper bottom surface of the elastic wall 623 can be designed to be lower than the upper bottom surface of the cylindrical part 622; the thickness of the elastic wall 623 is smaller than the thickness of the cylindrical part 622, which also makes the elastic force of the elastic wall 623 better, and more capable of ensuring that the cylindrical part 622 of the valve piece 62 completes high frequency reciprocating motion; Correspondingly, referring to Figure 9 , a long arc-shaped protrusion 779 is arranged at each of the two second notches 77 of the adapter 7, i.e. between the two arc-shaped protrusions 78 of the adapter 7; after assembly, the lower bottom surface 6231 of the elastic wall 623 is pressed on the upper surface of the long arc-shaped protrusion 779.

[0031] See Figures 1 to 6 and Figure 8 To improve the connection, the diaphragm 61 is cap-shaped, including a protruding head 611 and a bottom 612. The head 611 of the diaphragm 61 serves as a connector, that is, the connector 89 of the connecting rod 8 is connected to the head 611 of the diaphragm 6 of the diaphragm valve plate 6. Generally, the connector 89 is designed to resemble an "I" shape, with a locking head (not shown) at the top, a neck (not shown) in the middle, and a frustum-shaped bottom (not shown) at the bottom. The diameter of the neck is smaller than the diameter of the locking head, and the diameter of the locking head is smaller than the diameter of the bottom. Correspondingly, the head 611 of the diaphragm 61 has a cavity structure adapted to the connector 89, namely, a bottom cavity (not shown) adapted to the locking head of the connector 89, a middle cavity (not shown) adapted to the neck of the connector 89, and a bottom cavity (not shown) adapted to the bottom of the connector 89. The bottom 612 of the diaphragm 61 serves as a seal to ensure the seal between the pump body 5 and the main mounting cavity 119 of the main support 11.

[0032] See Figures 1 to 7 To improve the sealing effect, the bottom 612 of the diaphragm 61 is provided with an upper retaining protrusion 6121 and a lower retaining protrusion 6122. Correspondingly, the pump body 5 is provided with a first groove 55 that matches the upper retaining protrusion 6121 of the diaphragm 61, and the main mounting cavity 119 of the main body bracket 11 is provided with a second groove 1192 that matches the lower retaining protrusion 6122 of the diaphragm 61.

[0033] See Figures 1 to 9 During operation, the motor 10 drives the large gear 14. Under the eccentric structure of the large gear 14, the connecting rod 8 causes the diaphragm 61 of the diaphragm valve plate 6 fixed on the connector 89 of the connecting rod 8 to move up and down. This causes a change in the air pressure in the transition chamber 59 of the pump body 5, which in turn causes the cylindrical part 622 of the valve plate 62 of the diaphragm valve plate 6 to move up and down. This isolates or connects the first chamber 79 of the adapter 7 with the transition chamber 59 of the pump body 5. When connected, liquid (e.g., water) can flow into the transition chamber 59 of the pump body 5 after passing through the water tank (not shown), the water inlet bracket, the hose, and the first chamber 79 of the adapter 7. After the air pressure in the transition chamber 59 of the pump body 5 changes, the second chamber 39 of the nozzle silicone 3 is also opened or closed. When opened, liquid (e.g., water) in the transition chamber 59 of the pump body 5 can flow into the second chamber 39 of the nozzle silicone 3 and then be sprayed out through the nozzle 1.

[0034] See Figures 1 to 6The connecting part 63 of the diaphragm valve piece 6 has at least four functions: first, it serves as a connecting part to connect the diaphragm 61 and the valve piece 62 into one; second, it serves as a fulcrum, when the connecting part 63 of the diaphragm valve piece 6 is pressed by the pump body 5 at the first gap 117 between the upper part of the main installation cavity 119 and the upper part of the auxiliary installation cavity 118 of the main body support 11, the valve piece 62 moves up and down with the connecting part 63 as the fulcrum; third, it serves as a restoring part, when the valve piece 62 moves up, it has the function of making the valve piece 62 move down to restore; fourth, it serves as a sealing part, when the connecting part 63 of the diaphragm valve piece 6 is pressed by the pump body 5 at the first gap 117 between the upper part of the main installation cavity 119 and the upper part of the auxiliary installation cavity 118 of the main body support 11, it seals the first gap 117.

[0035] The above-described embodiments only express the preferred embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as limiting the scope of the present application; it should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application should belong to the scope of the claims of the present application.

Claims

1. A dental cleaner with integrated diaphragm and valve, comprising a pump body (5) provided with a transition cavity (59), an adapter (7) provided with a first cavity (79), a connecting rod (8) provided with a connecting head (89), and a main body support (11) provided with a main mounting cavity (119) and a secondary mounting cavity (118); characterized in that: it further comprises a diaphragm valve (6) comprising a diaphragm (61) and a valve (62), and a connecting portion (63) connecting the diaphragm (61) and the valve (62) into one body; the main body support (11) is provided with a first gap (117) connecting the upper part of the main mounting cavity (119) and the upper part of the secondary mounting cavity (118); the diaphragm valve (6) is located between the main body support (11) and the pump body (5), and the pump body (5) is sealed and fixed on the main body support (11), wherein the diaphragm (61) of the diaphragm valve (6) is located in the main mounting cavity (119) of the main body support (11), so that the pump body (5) is sealed at the main mounting cavity (119) of the main body support (11); the valve (62) of the diaphragm valve (6) is located on the adapter (7) provided on the secondary mounting cavity (118) of the main body support (11), so that the pump body (5) is sealed at the secondary mounting cavity (118) of the main body support (11); the connecting portion (63) of the diaphragm valve (6) is located at the first gap (117) between the upper part of the main mounting cavity (119) and the upper part of the secondary mounting cavity (118) of the main body support (11), so that the pump body (5) is sealed at the first gap (117) of the main body support (11); the connecting rod (8) is located in the main mounting cavity (119) of the main body support (11), and the connecting head (89) of the connecting rod (8) is connected with the diaphragm (61) of the diaphragm valve (6); the adapter (7) is provided on the secondary mounting cavity (118) of the main body support (11), and the upper outlet of the first cavity (79) of the adapter (7) can be closed or opened by the valve (62) of the diaphragm valve (6), so that the first cavity (79) of the adapter (7) is isolated or connected with the transition cavity (59) of the pump body (5).

2. The dental cleaner with integrated diaphragm and valve according to claim 1, characterized in that: the valve (62) comprises a circular ring body (621), a cylindrical portion (622) located at the middle of the circular ring body (621), and two elastic walls (623) connecting the inner circumferential surface of the circular ring body (621) with the outer circumferential surface of the cylindrical portion (622), and two arc-shaped through holes (624) are formed between the two elastic walls (623), the outer circumferential surface of the cylindrical portion (622), and the inner circumferential surface of the circular ring body (621); the upper outlet edge of the first cavity (79) of the adapter (7) is provided with two arc-shaped protrusions (78), and two second gaps (77) are formed between the two arc-shaped protrusions (78). ​ ​ ​ The two arc-shaped protrusions (78) of the adapter (7) are inserted into the two arc-shaped through holes (624) of the valve piece (62), the two elastic walls (623) of the valve piece (62) are located at the two second notches (77) of the adapter (7), and the cylindrical part (622) of the valve piece (62) can seal or open the upper outlet of the first cavity (79) of the adapter (7).

3. The integrated diaphragm and valve piece type oral irrigator according to claim 2, characterized in that: The lower bottom surface (6231) of the elastic wall (623) is lower than the lower bottom surface (6221) of the cylindrical part (622).

4. The integrated diaphragm and valve piece type oral irrigator according to any one of claims 1 to 3, characterized in that: The diaphragm piece (61) is in the shape of a hat, comprising a protruding head part (611) and a bottom part (612); and the connecting head (89) of the connecting rod (8) is connected to the head part (611) of the diaphragm piece (61) of the diaphragm valve piece (6).

5. The integrated diaphragm and valve piece type oral irrigator according to claim 4, characterized in that: The bottom part (612) of the diaphragm piece (61) is provided with an upper clamping protrusion (6121) and a lower clamping protrusion (6122) upward; and the pump body (5) is provided with a first groove (55) corresponding to the upper clamping protrusion (6121) of the diaphragm piece (61), and the upper part of the main installation cavity (119) of the main body support (11) is provided with a second groove (1192) corresponding to the lower clamping protrusion (6122) of the diaphragm piece (61).

6. A diaphragm valve piece for an oral irrigator, characterized in that: The diaphragm valve piece (6) comprises a diaphragm piece (61) and a valve piece (62), and a connecting part (63) connecting the diaphragm piece (61) and the valve piece (62) into one body.

7. The diaphragm valve piece according to claim 6, characterized in that: The valve piece (62) comprises a circular ring main body (621), a cylindrical part (622) located at the middle part of the circular ring main body (621), and two elastic walls (623) connecting the inner circumferential surface of the circular ring main body (621) and the outer circumferential surface of the cylindrical part (622), and the two elastic walls (623), the outer circumferential surface of the cylindrical part (622) and the inner circumferential surface of the circular ring main body (621) form two arc-shaped through holes (624).

8. The diaphragm valve piece according to claim 7, characterized in that: The lower bottom surface (6231) of the elastic wall (623) is lower than the lower bottom surface (6221) of the cylindrical part (622).

9. The diaphragm valve piece according to any one of claims 6 to 8, characterized in that: The diaphragm piece (61) is in the shape of a hat, comprising a protruding head part (611) and a bottom part (612).

10. The diaphragm valve piece according to claim 9, characterized in that: The bottom part (612) of the diaphragm piece (61) is provided with an upper clamping protrusion (6121) and a lower clamping protrusion (6122) upward.

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