An automatic discharging pressure pump device

Abstract

The present invention discloses a pressure pump device with automatic discharging, which includes a bottle body and an outer cover body. An inner cover body is arranged at the bottle mouth of the bottle body. A liquid storage tube is formed on the surface of the inner cover body. A guide sleeve is arranged at the upper end of the liquid storage tube. A lifting tube is arranged inside the guide sleeve. The bottom end of the lifting tube extends into the liquid storage tube and is provided with a suction rubber valve. A pump plug is arranged on the outer side of the bottom end of the lifting tube. A supporting spring is arranged between the lifting tube and the guide sleeve. An outlet cover is arranged at the upper end of the lifting tube. An outlet rubber valve is arranged on the surface of the outlet cover. The outer cover body is in plug-in fit with the inner cover body, and a pressure sleeve is formed on the inner top surface of the outer cover body. The beneficial effects are as follows: When the outer cover body is opened, automatic liquid discharging can be realized without the user pressing for liquid discharging, and the operation is simple and convenient; While carrying out automatic liquid discharging, the amount of liquid discharged each time is stable and unified, without causing waste; It can realize the sealed storage of liquid, and the storage effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of pump bottles, and particularly relates to a pump device with automatic discharging. Background Art

[0002] When storing liquids, in order to facilitate the taking and placing of liquids, pump bottles are often used for liquid storage. During the use of current pump bottles, manual pressing is required for discharging. Affected by the magnitude of the pressing force, the discharge amount is different, and the discharge amount cannot be accurately controlled, which easily causes waste; during the use of pump bottles, air easily enters the inside of the bottle body, affecting the liquid storage effect. Summary of the Invention

[0003] The purpose of the present invention is to provide a pump device with automatic discharging to solve the above problems, as described in detail below.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A pump device with automatic discharging provided by the present invention includes a bottle body and an outer cover body. The bottom end of the bottle body is an open structure and is clamped with a bottom cover. A ventilation hole is penetrated through the surface of the bottom cover. A bottom piston is slidably arranged inside the bottle body. The bottom piston divides the inner cavity of the bottle body into an upper and a lower part, namely a sealed cavity for storing liquid and an air inlet cavity.

[0006] An inner cover body is arranged at the bottle mouth of the bottle body for sealing the bottle mouth. A liquid storage tube is formed on the surface of the inner cover body. The bottom end of the liquid storage tube extends into the inside of the bottle mouth. A guide sleeve is arranged at the upper end of the liquid storage tube. A lifting tube is arranged inside the guide sleeve. The lifting tube is in close contact with the guide sleeve. The bottom end of the lifting tube extends into the liquid storage tube and is provided with a suction rubber valve. The suction rubber valve is communicated with the inner cavity of the lifting tube. A pump plug is arranged on the outer side of the bottom end of the lifting tube. The pump plug is in close contact with the liquid storage tube, and a liquid storage cavity is formed between the pump plug and the liquid storage tube. A liquid guiding hole is penetrated through the outer side of the lifting tube. The liquid guiding hole is communicated with the liquid storage cavity.

[0007] A supporting spring is arranged between the lifting tube and the guide sleeve for driving the lifting tube to rise. An out - liquid cover is arranged at the upper end of the lifting tube. A discharging rubber valve is arranged on the surface of the out - liquid cover. The outer cover body is in plug - in fit with the inner cover body. A pressing sleeve is formed on the inner top surface of the outer cover body. The pressing sleeve corresponds to the out - liquid cover for pressing down the out - liquid cover against the elastic force of the supporting spring.

[0008] When using the above-mentioned pressure pump device with automatic discharging, during use, the solution fills the sealed cavity, and the outer cover body is pressed on the outside of the inner cover body. As the outer cover body is pressed down, the pressure sleeve presses down the discharging cover, overcoming the elastic force of the supporting spring, causing the discharging cover to drive the lifting tube to descend inside the guiding sleeve. As the lifting tube descends, the pump plug slides down inside the storage cavity. During this process, the volume of the storage cavity becomes larger to form a negative pressure. At the same time, the air pressure inside the air inlet cavity presses on the bottom piston. Under the combined action of the negative pressure and the pressure from the bottom piston, the liquid inside the sealed cavity enters the inner cavity of the lifting tube through the suction rubber valve and enters the inside of the liquid storage cavity through the liquid guiding hole, completing the liquid suction; when the liquid needs to be used, the outer cover body is removed, and the pressure of the pressure sleeve on the discharging cover is released. Under the supporting action of the supporting spring, the lifting tube drives the liquid discharging cover to rise, and the pump plug rises inside the liquid storage cavity along with the lifting tube. Under the extrusion of the pump plug, the liquid inside the liquid storage cavity enters the inner cavity of the lifting tube through the liquid guiding hole and finally is discharged through the discharging rubber valve and stays on the surface of the liquid discharging cover, realizing automatic liquid discharging without the user pressing for liquid discharging, and the operation is simple and convenient; during the liquid suction and discharging process, the lifting tube is evenly stressed and has a stable stroke, so the amount of liquid discharged each time is stable and unified, which can effectively avoid waste; during use, external gas enters the inside of the air inlet cavity through the ventilation hole, and the air pressure is used to push the bottom piston, and the liquid is pushed by the bottom piston to fill the sealed cavity. It is not easy for gas to enter the sealed cavity, which helps to ensure the liquid storage effect.

[0009] Preferably, a stepped portion for sleeving the pump plug is provided at the bottom of the lifting tube. A limiting block is provided at the bottom end of the lifting tube. The suction rubber valve is provided at the bottom end of the limiting block. Insertion posts are provided on the surface of the limiting block. A limiting groove is provided at the bottom of the inner wall of the lifting tube. The insertion posts extend into the inside of the lifting tube. Limiting protrusions that cooperate with the limiting groove are provided on the outer wall of the insertion posts. A diversion cavity is provided inside the insertion posts for communicating the suction rubber valve and the inner cavity of the lifting tube.

[0010] Preferably, a blocking ring is formed on the outside of the limiting block. A bottom limiting ring is provided at the bottom end of the liquid storage tube for limiting the blocking ring.

[0011] Preferably, a socket sleeve is formed on the bottom surface of the liquid discharging cover. The discharging rubber valve is communicated with the socket sleeve. A socket cavity is provided at the bottom of the socket sleeve. Positioning grooves are provided on the inner wall of the socket cavity. The upper part of the lifting tube is inserted into the inside of the socket cavity. Positioning protrusions that cooperate with the positioning grooves are provided on the outside of the upper part of the lifting tube.

[0012] Preferably, a positioning ring is formed on the outer side of the lifting tube, the positioning ring abuts against the insertion sleeve, a connection cover is formed on the outer side of the guiding sleeve, and the supporting spring is sleeved on the outer side of the lifting tube and is located between the positioning ring and the connection cover.

[0013] Preferably, an upper limiting ring is formed on the outer side of the upper end of the liquid storage tube, and a convex ring is formed on the inner wall of the connection cover for cooperating with the upper limiting ring to clamp and fix the connection cover at the upper end of the liquid storage tube.

[0014] Preferably, the surface of the liquid outlet cover is a concave arc surface, and the rubber valve is located at the center of the liquid outlet cover.

[0015] Preferably, a transition cavity is provided on the inner wall of the bottom of the guiding sleeve.

[0016] Preferably, the outer cover body includes an outer sleeve body, a positioning port is penetrated through the outer wall of the outer sleeve body, a clamping ring is provided in the middle of the inner part of the outer sleeve body, the clamping ring is in clamping fit with the inner cover body, an elastic clamping block is provided on the outer side of the clamping ring, the elastic clamping block is in clamping fit with the positioning port, a bottom ring is clamped at the inner bottom of the outer sleeve body, and the inner wall of the bottom ring is in contact with the outer wall of the bottom of the inner cover body.

[0017] The beneficial effects are as follows: 1. When the outer cover body is opened, automatic liquid outlet can be realized, and there is no need for the user to press for liquid outlet, and the operation is simple and convenient;

[0018] 2. While the liquid is automatically discharged, the amount of liquid discharged each time is stable and uniform, and no waste will be caused;

[0019] 3. During the use process, external gas enters the inside of the air inlet cavity through the air vent hole, the bottom piston is pushed by the air pressure, the liquid is pushed by the bottom piston to fill the sealing cavity, and it is not easy for gas to enter the inside of the sealing cavity, which helps to ensure the liquid storage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is the front view sectional view of the present invention;

[0022] Figure 2 is Figure 1 the partially enlarged schematic view after hiding the outer cover body;

[0023] Figure 3It is a partially enlarged schematic view after removing the outer cover of the present invention;

[0024] Figure 4 It is a three-dimensional structural schematic view of the lifting tube;

[0025] Figure 5 It is a structural schematic view of the outer cover.

[0026] The description of the reference numerals is as follows:

[0027] 1. Outer cover; 101. Outer sleeve; 102. Positioning port; 103. Snap ring; 104. Elastic clamping block; 105. Bottom ring; 2. Inner cover; 3. Bottle body; 301. Sealing cavity; 302. Air inlet cavity; 4. Bottom piston; 5. Bottom cover; 501. Vent hole; 6. Suction rubber valve; 7. Limit block; 701. Blocking ring; 702. Limit protrusion; 703. Insertion column; 704. Diversion cavity; 8. Pump plug; 9. Guide sleeve; 901. Connection cover; 902. Convex ring; 903. Transition cavity; 10. Supporting spring; 11. Lifting tube; 1101. Step part; 1102. Limit groove; 1103. Liquid guide hole; 1104. Positioning ring; 1105. Positioning protrusion; 12. Liquid outlet cover; 1201. Insertion sleeve; 1202. Insertion cavity; 1203. Positioning groove; 13. Discharge rubber valve; 14. Pressing sleeve; 15. Liquid storage tube; 1501. Liquid storage cavity; 1502. Bottom limit ring; 1503. Upper limit ring. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0029] See Figures 1 - 5 As shown, the present invention provides a pressure pump device with automatic discharging, which includes a bottle body 3 and an outer cover 1. The bottom end of the bottle body 3 is an open structure and is clamped with a bottom cover 5. A vent hole 501 is penetrated through the surface of the bottom cover 5. A bottom piston 4 is slidably arranged inside the bottle body 3. The bottom piston 4 divides the inner cavity of the bottle body 3 into an upper and a lower part, namely a sealing cavity 301 for storing liquid and an air inlet cavity 302;

[0030] An inner cover body 2 is provided at the mouth of the bottle body 3 for sealing the mouth of the bottle. Preferably, the inner cover body 2 is threadedly connected to the mouth of the bottle body 3. A liquid storage tube 15 is formed on the surface of the inner cover body 2, and the bottom end of the liquid storage tube 15 extends into the inside of the bottle mouth; a guide sleeve 9 is provided at the upper end of the liquid storage tube 15, and a lifting tube 11 is provided inside the guide sleeve 9, and the lifting tube 11 is in close contact with the guide sleeve 9; the bottom end of the lifting tube 11 extends into the liquid storage tube 15 and is provided with a suction rubber valve 6, and the suction rubber valve 6 is communicated with the inner cavity of the lifting tube 11, and a pump plug 8 is provided on the outer side of the bottom end of the lifting tube 11, and the pump plug 8 is in close contact with the liquid storage tube 15, and a liquid storage cavity 1501 is formed between the pump plug 8 and the liquid storage tube 15, and a liquid guide hole 1103 is provided through the outer side of the lifting tube 11, and the liquid guide hole 1103 is communicated with the liquid storage cavity 1501;

[0031] A supporting spring 10 is arranged between the lifting tube 11 and the guide sleeve 9 for driving the lifting tube 11 to rise; a liquid outlet cover 12 is arranged at the upper end of the lifting tube 11, and a discharge rubber valve 13 is arranged on the surface of the liquid outlet cover 12; the outer cover body 1 is plugged into and matched with the inner cover body 2, and a pressure sleeve 14 is formed on the inner top surface of the outer cover body 1, and the pressure sleeve 14 corresponds to the liquid outlet cover 12 and is used to overcome the elastic force of the supporting spring 10 to press down the liquid outlet cover 12; the suction rubber valve 6 and the discharge rubber valve 13 are both one-way valves.

[0032] As an optional embodiment, a step portion 1101 for fitting the pump plug 8 is provided at the bottom of the lifting tube 11, a limiting block 7 is provided at the bottom end of the lifting tube 11, a suction rubber valve 6 is provided at the bottom end of the limiting block 7, a plug-in column 703 is provided on the surface of the limiting block 7, a limiting groove 1102 is provided at the bottom of the inner wall of the lifting tube 11, the plug-in column 703 extends into the interior of the lifting tube 11, and a limiting protrusion 702 matching the limiting groove 1102 is provided on the outer wall of the plug-in column 703, and a guide cavity 704 is provided inside the plug-in column 703 for connecting the suction rubber valve 6 and the inner cavity of the lifting tube 11. In this way, the plug-in column 703 and the lifting tube 11 are connected by the cooperation of the limiting protrusion 702 and the limiting groove 1102, so that the pump plug 8 can be limited and fixed on the step portion 1101 at the bottom end of the lifting tube 11 through the limiting block 7, thereby ensuring the stability of the pump plug 8.

[0033] A blocking ring 701 is formed on the outer side of the limiting block 7, and a bottom limiting ring 1502 is arranged at the bottom end of the liquid storage tube 15 for limiting the blocking ring 701. In this arrangement, the blocking ring 701 and the bottom limiting ring 1502 cooperate to limit the pump plug 8 from leaving the inner cavity of the liquid storage tube 15.

[0034] The bottom surface of the liquid outlet cover 12 is formed with a socket sleeve 1201. The rubber valve is communicated with the socket sleeve 1201. A socket cavity 1202 is arranged at the bottom of the socket sleeve 1201. A positioning groove 1203 is arranged on the inner wall of the socket cavity 1202. The upper part of the lifting pipe 11 is inserted into the socket cavity 1202. A positioning protrusion 1105 that cooperates with the positioning groove 1203 is arranged on the outer side of the upper part of the lifting pipe 11. With such a setting, the insertion of the lifting pipe 11 and the socket cavity 1202 is realized through the positioning protrusion 1105 and the positioning groove 1203, thereby realizing the detachable connection between the lifting pipe 11 and the liquid outlet cover 12, which is convenient for installation and subsequent maintenance.

[0035] A positioning ring 1104 is formed on the outer side of the lifting pipe 11. The positioning ring 1104 abuts against the socket sleeve 1201. A connecting cover 901 is formed on the outer side of the guide sleeve 9. The supporting spring 10 is sleeved on the outer side of the lifting pipe 11 and is located between the positioning ring 1104 and the connecting cover 901.

[0036] An upper limit ring 1503 is formed on the outer side of the upper end of the liquid storage pipe 15. A convex ring 902 is formed on the inner wall of the connecting cover 901, which is used to cooperate with the upper limit ring 1503 to clamp and fix the connecting cover 901 at the upper end of the liquid storage pipe 15. With such a setting, the detachable connection between the guide sleeve 9 and the liquid storage pipe 15 is conveniently realized through the cooperation of the upper limit ring 1503 and the convex ring 902, which is convenient for installation and subsequent maintenance.

[0037] The surface of the liquid outlet cover 12 is a concave arc surface, and the discharging rubber valve 13 is located at the center of the liquid outlet cover 12. With such a setting, it is convenient for the solution to stay on the surface of the liquid outlet cover 12.

[0038] A transition cavity 903 is arranged on the inner wall of the bottom of the guide sleeve 9. With such a setting, as the lifting pipe 11 rises, the liquid guide hole 1103 will enter the guide sleeve 9. By arranging the transition cavity 903, it is convenient for the liquid in the liquid storage cavity 1501 to fully enter the inner cavity of the lifting pipe 11 through the transition cavity 903 and the liquid guide hole 1103.

[0039] The outer cover body 1 includes an outer sleeve body 101. A positioning opening 102 is arranged through the outer wall of the outer sleeve body 101. A snap ring 103 is arranged in the middle of the outer sleeve body 101. The snap ring 103 is in snap fit with the inner cover body 2. Elastic clamping blocks 104 are arranged on the outer side of the snap ring 103, and the elastic clamping blocks 104 are in snap fit with the positioning opening 102. A bottom ring 105 is clamped at the inner bottom of the outer sleeve body 101, and the inner wall of the bottom ring 105 is in contact with the outer wall of the bottom of the inner cover body 2. With such a setting, the disassembly and assembly of the outer cover body 1 are conveniently realized through the snap fit of the snap ring 103 and the inner cover body 2. By contacting the outer wall of the bottom of the inner cover body 2 with the inner wall of the bottom ring 105, the stability of the outer cover body 1 can be ensured.

[0040] With the above structure, during use, the solution fills the sealed chamber 301. The outer cover body 1 is pressed on the outside of the inner cover body 2. As the outer cover body 1 is pressed down, the pressure sleeve 14 presses down the discharge cover, overcoming the elastic force of the supporting spring 10, causing the discharge cover to drive the lifting tube 11 to descend inside the guiding sleeve 9. As the lifting tube 11 descends, the pump plug 8 slides down inside the storage chamber. During this process, the volume of the storage chamber becomes larger to form a negative pressure. At the same time, the air pressure inside the air inlet chamber 302 presses on the bottom piston 4. Under the combined action of the negative pressure and the pressure from the bottom piston 4, the liquid inside the sealed chamber 301 enters the inner cavity of the lifting tube 11 through the suction rubber valve 6 and enters the inside of the liquid storage chamber 1501 through the liquid guiding hole 1103, completing the liquid suction; when the liquid needs to be used, the outer cover body 1 is removed, and the pressure of the pressure sleeve 14 on the discharge cover is released. Under the supporting action of the supporting spring 10, the lifting tube 11 drives the liquid discharge cover 12 to rise, and the pump plug 8 rises inside the liquid storage chamber 1501 along with the lifting tube 11. Under the extrusion of the pump plug 8, the liquid inside the liquid storage chamber 1501 enters the inner cavity of the lifting tube 11 through the liquid guiding hole 1103 and finally is discharged through the discharge rubber valve 13 and stays on the surface of the liquid discharge cover 12, realizing automatic liquid discharge without the user pressing for liquid discharge, and the operation is simple and convenient; during the liquid suction and discharge processes, the lifting tube 11 is evenly stressed and has a stable stroke, so the amount of liquid discharged each time is stable and unified, effectively avoiding waste; during use, external gas enters the inside of the air inlet chamber 302 through the ventilation hole 501, and the air pressure is used to push the bottom piston 4. The liquid is pushed by the bottom piston 4 to fill the sealed chamber 301, and it is not easy for gas to enter the inside of the sealed chamber 301, which helps to ensure the liquid storage effect.

[0041] As described above, this is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. An automatic discharging pressure pump device, characterized in that: It includes a bottle body (3) and an outer cover body (1). The bottom end of the bottle body (3) is an open structure and is clamped with a bottom cover (5). The surface of the bottom cover (5) is provided with a ventilation hole (501) penetrating through it. A bottom piston (4) is slidably arranged inside the bottle body (3). The bottom piston (4) divides the inner cavity of the bottle body (3) into an upper and a lower part, namely a sealed cavity (301) for storing liquid and an air inlet cavity (302). An inner cover body (2) is arranged at the bottle mouth of the bottle body (3) for sealing the bottle mouth. A liquid storage tube (15) is formed on the surface of the inner cover body (2), and the bottom end of the liquid storage tube (15) extends into the inside of the bottle mouth. A guide sleeve (9) is arranged at the upper end of the liquid storage tube (15). A lifting tube (11) is arranged inside the guide sleeve (9), and the lifting tube (11) is in close contact with the guide sleeve (9). The bottom end of the lifting tube (11) extends into the liquid storage tube (15) and is provided with a suction rubber valve (6). The suction rubber valve (6) is communicated with the inner cavity of the lifting tube (11). A pump plug (8) is arranged on the outer side of the bottom end of the lifting tube (11). The pump plug (8) is in close contact with the liquid storage tube (15), and a liquid storage cavity (1501) is formed between the pump plug (8) and the guide sleeve (9). A liquid guide hole (1103) is arranged through the outer side of the lifting tube (11), and the liquid guide hole (1103) is communicated with the liquid storage cavity (1501). A supporting spring (10) is arranged between the lifting tube (11) and the guide sleeve (9) for driving the lifting tube (11) to rise. An outlet cover (12) is arranged at the upper end of the lifting tube (11). A discharge rubber valve (13) is arranged on the surface of the outlet cover (12). The outer cover body (1) is in plug-in fit with the inner cover body (2). A pressing sleeve (14) is formed on the inner top surface of the outer cover body (1). The pressing sleeve (14) corresponds to the outlet cover (12) for pressing down the outlet cover (12) against the elastic force of the supporting spring (10). The surface of the outlet cover (12) is a concave arc surface, and the discharge rubber valve (13) is located at the center of the outlet cover (12). A transition cavity (903) is arranged on the inner wall of the bottom of the guide sleeve (9).

2. The automatic discharging pressure pump device according to claim 1, wherein: A step portion (1101) for sleeving the pump plug (8) is arranged at the bottom of the lifting tube (11). A limit block (7) is arranged at the bottom end of the lifting tube (11). The suction rubber valve (6) is arranged at the bottom end of the limit block (7). A plug column (703) is arranged on the surface of the limit block (7). A limit groove (1102) is arranged at the bottom of the inner wall of the lifting tube (11). The plug column (703) extends into the inside of the lifting tube (11). A limit protrusion (702) matching with the limit groove (1102) is arranged on the outer wall of the plug column (703). A diversion cavity (704) is arranged inside the plug column (703) for communicating the suction rubber valve (6) and the inner cavity of the lifting tube (11).

3. The automatic discharging pressure pump device according to claim 2, characterized in that: A blocking ring (701) is formed on the outer side of the limiting block (7), and a bottom limiting ring (1502) is arranged at the bottom end of the liquid storage pipe (15) for limiting the blocking ring (701).

4. The automatic discharging pressure pump device according to claim 2, characterized in that: A plugging sleeve (1201) is formed on the bottom surface of the liquid outlet cover (12). The discharging rubber valve (13) is communicated with the plugging sleeve (1201). A plugging cavity (1202) is arranged at the bottom of the plugging sleeve (1201). A positioning groove (1203) is arranged on the inner wall of the plugging cavity (1202). The upper part of the lifting pipe (11) is inserted into the plugging cavity (1202). A positioning protrusion (1105) which is matched with the positioning groove (1203) is arranged on the outer side of the upper part of the lifting pipe (11).

5. The automatic discharging pressure pump device according to claim 4, wherein: A positioning ring (1104) is formed on the outer side of the lifting pipe (11). The positioning ring (1104) abuts against the plugging sleeve (1201). A connecting cover (901) is formed on the outer side of the guiding sleeve (9). The supporting spring (10) is sleeved on the outer side of the lifting pipe (11) and is located between the positioning ring (1104) and the connecting cover (901).

6. The automatic discharging pressure pump device according to claim 5, wherein: An upper limiting ring (1503) is formed on the outer side of the upper end of the liquid storage pipe (15). A convex ring (902) is formed on the inner wall of the connecting cover (901) for clamping and fixing the connecting cover (901) on the upper end of the liquid storage pipe (15) in cooperation with the upper limiting ring (1503).

7. The automatic discharging pressure pump device according to claim 1, wherein: The outer cover body (1) includes an outer sleeve body (101). A positioning port (102) is arranged through the outer wall of the outer sleeve body (101). A clamping ring (103) is arranged in the middle of the inner part of the outer sleeve body (101). The clamping ring (103) is in clamping cooperation with the inner cover body (2). An elastic clamping block (104) is arranged on the outer side of the clamping ring (103). The elastic clamping block (104) is in clamping cooperation with the positioning port (102). A bottom ring (105) is clamped at the inner bottom of the outer sleeve body (101). The inner wall of the bottom ring (105) is in contact with the outer wall of the bottom of the inner cover body (2).

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