Neck connecting device of full-pressure equipment

Abstract

The invention relates to a full-pressure equipment neck connecting device, a helmet connecting ring is hermetically connected to a neck opening of a closed helmet, a neck ring assembly comprises a neck ring and a rotating ring rotatably sleeving the neck ring, a lock assembly is mounted on the neck ring assembly and can lock and unlock the rotating ring, and a neck sealing assembly comprises a sealing ring pipe and an inflation module thereof. The garment connecting ring is hermetically connected to the neck opening of the full-pressure garment; a first outward ring groove is formed in the outer side of the helmet connecting ring, a second downward ring groove is formed in the inner side of the helmet connecting ring, a radial spring pin and an upward ring cutter are arranged on the inner side of the neck ring, the lower end of the helmet connecting ring extends into the neck ring assembly, the spring pin extends into the first ring groove to achieve assembly, and the rotating ring can rotate to drive the spring pin to retreat from and extend into the first ring groove after being unlocked. The upper side of the sealing ring pipe is installed in the second ring groove, the lower side face of the sealing ring pipe is annularly cut, and the sealing ring pipe is in compression joint with the annular cut to achieve sealing after being inflated. According to the device, the neck can be sealed in a full-pressure state, and the sealed helmet can freely rotate in a non-full-pressure state.

Description

Technical Field

[0001] This application relates to full-pressure equipment, and more specifically to a neck connection device for full-pressure equipment. Background Technology

[0002] Total pressure equipment requires the creation of an absolutely sealed gaseous space inside the equipment to ensure normal personnel pressure. Apart from oxygen supply specifically for breathing, no external gases should enter the equipment.

[0003] For full-pressure equipment, the neck area is a crucial connection point, connecting the sealed helmet above and the full-pressure suit below. Currently, once the sealed helmet is installed at the neck position, it is completely fixed and cannot be rotated. In non-full-pressure conditions, it is impossible to guarantee free neck rotation and normal observation, which is very inconvenient. Summary of the Invention

[0004] The purpose of this application is to provide a neck connection device for full-pressure equipment. This device can quickly switch states, achieving a neck seal in full-pressure conditions and allowing the sealed helmet to rotate freely in non-full-pressure conditions, making the sealed helmet easy to load and unload.

[0005] The technical solution adopted in this application is: A neck connection device for full-pressure equipment includes a helmet connecting ring, a neck ring assembly, a locking assembly, a neck sealing assembly, and a clothing connecting ring. The helmet connecting ring is sealed to the neck opening of a helmet. The neck ring assembly includes a neck ring and a rotating ring rotatably fitted onto the neck ring. The locking assembly is mounted on the neck ring assembly and can lock and unlock the rotating ring. The neck sealing assembly includes a sealing ring tube and its inflation module. The clothing connecting ring is sealed to the neck opening of a full-pressure garment and is sealed to the neck ring. The helmet connecting ring has an outward-facing annular groove 1 on its outer side and a downward-facing annular groove 2 on its inner side. The neck ring has a radial spring pin and an upward-facing ring cut on its inner side. The lower end of the helmet connecting ring extends into the neck ring assembly and is assembled by the spring pin extending into the annular groove 1. After the rotating ring is unlocked, it can rotate to drive the spring pin out and into the annular groove 1. The upper side of the sealing ring tube is installed in the annular groove 2, and the lower side faces the ring cut. After the sealing ring tube is inflated, it is pressed against the ring cut to achieve a seal.

[0006] Preferably, the upper end of the helmet connecting ring is provided with an upward-facing annular groove three. After the neck opening of the sealed helmet is inserted into the annular groove three, it is fixed by a pin and the annular groove three is filled with sealant to achieve a seal.

[0007] Preferably, the outer side of the lower end of the helmet connecting ring contacts the inner side of the neck ring, and the damping of rotation under non-full pressure after the sealed helmet is worn is adjusted by adjusting the roughness of the contact surface.

[0008] Preferably, the air inflation module of the sealing ring tube includes an air inflation tube with a valve, the air inflation tube being connected to the sealing ring tube via an air nozzle, and the valve being a solenoid valve or a manual valve.

[0009] Preferably, the spring pin has a pin head at one radially inward end and a spring at the other radially outward end. The pin head and spring are installed in the mounting groove of the neck ring. Initially, the spring pin is in the extended state and the helmet connecting ring can be directly pressed down for installation. A synchronizing element is provided on the upper side of the middle of the pin head, and a protrusion with a variable cross-section along the circumference is provided on the inner side of the rotating ring. The protrusion contacts the synchronizing element but does not interfere with the helmet connecting ring. When the rotating ring rotates in the unlocking direction, the protrusion can drive the pin head to gradually retract through the synchronizing element. When the rotating ring rotates in the locking direction, the pin head gradually extends under the action of spring.

[0010] Preferably, the neck ring is assembled from an upper neck ring and a lower neck ring. The mounting groove is located on the inner ring of the top surface of the lower neck ring, the upper neck ring is located on the top surface of the lower neck ring and covers the spring pin, and the upper neck ring is provided with a radial straight hole, through which the synchronizing element extends upward.

[0011] Preferably, the lock assembly includes a lock housing mounted on the outside of the rotating ring. The lock housing has a locking pin and a second spring inside, and a button on the upper outer side. The locking pin slides radially with the lock housing and aligns with the lock holes on the lock housing and the neck ring. The second spring acts radially on the locking pin. The button slides vertically with the lock housing and acts on the locking pin. Initially, the locking pin passes through the lock holes on the lock housing and the neck ring. When the button is pressed down, it can overcome the force of the second spring and drive the locking pin out of the lock hole on the neck ring.

[0012] Preferably, the lock shell is assembled from a shell and a cover. The shell has a lock hole and a shell through hole on its inner side, with the shell through hole located on both sides of the lock hole. The cover covers the missing top surface and the outer side of the shell. A connecting rod is provided on the lock pin, and the connecting rod has connecting rod through holes on both sides of the lock pin. The top surface of the cover has a guide hole and the side has a mounting hole. The guide screw passes through the corresponding shell through hole, connecting rod through hole, and spring two in sequence and is then installed on the mounting hole. The button slides in the guide hole and its lower end acts on the connecting rod through the arc surface.

[0013] Preferably, a positioning seat is provided on the outer side of the neck ring, and a circumferential hole is provided on the rotating ring. The positioning seat passes through the circumferential hole without interference, and the lock shell is initially limited by the positioning seat.

[0014] Preferably, the garment connecting ring is sealed to the neck opening of the fully pressurized garment by a sealing gasket and fastened by screws.

[0015] The beneficial effects of this application are: This device allows for rapid switching between states by controlling the inflation and deflation of the sealing ring tube. When inflated, the sealing ring tube is pressed against the circumferential cutter to achieve a neck seal, allowing the full-pressure equipment to enter a full-pressure state. In this state, the sealed helmet cannot rotate freely under the pressure of the sealing ring tube. When the sealing ring tube is deflated, the full-pressure equipment can enter a non-full-pressure state, allowing the sealed helmet to rotate freely. The device utilizes a combination of locking components, a rotating ring, and a neck ring to control the extension and retraction of the spring pin, facilitating the insertion and removal of the sealed helmet. This device can be applied in various work scenarios requiring airtightness of wearable equipment, such as full-pressure and toxic gas protection applications. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the neck connection device for the full-pressure equipment in this invention.

[0018] Figure 2 This is a schematic diagram of the installation of the helmet connecting ring and the sealed helmet neck opening in this invention.

[0019] Figure 3 This is a disassembly diagram of the lock assembly and positioning seat in this invention.

[0020] Figure 4 This is a disassembly diagram of the neck ring assembly in this invention.

[0021] Figure 5 This is a schematic diagram of the neck sealing assembly in this invention.

[0022] Figure 6 This is a schematic diagram of the installation of the garment connecting ring and the neck opening of the fully pressurized garment in this invention.

[0023] Figure 7 This is a schematic diagram of the helmet connecting ring being installed in this invention.

[0024] Figure 8 This is a schematic diagram of removing the helmet connecting ring in this invention.

[0025] In the picture: 1-Sealed helmet neck opening; 2-Pin; 3-Compression clothing neck opening; 4-Sealing gasket; 5-Screw; 100 - Helmet connecting ring; 101 - Ring groove one; 102 - Ring groove two; 103 - Ring groove three; 200 - Neck ring assembly; 210 - Rotary ring; 211 - Protrusion; 212 - Circumferential hole; 220 - Upper neck ring; 221 - Straight hole; 230 - Lower neck ring; 231 - Circumferential cut; 232 - Mounting groove; 300 - Neck sealing assembly; 310 - Sealing ring tube; 320 - Air nozzle; 330 - Valve; 340 - Inflation tube; 400 - Garment Connecting Ring; 500 - Lock assembly; 510 - Guide screw; 520 - Housing; 521 - Lock hole; 522 - Housing through hole; 530 - Button; 531 - Curved surface; 540 - Linkage rod; 541 - Linkage rod through hole; 550 - Lock pin; 560 - Cover; 561 - Guide hole; 562 - Mounting hole; 570 - Spring II; 600-Positioning Seat; 700 - Spring pin; 710 - Pin head; 720 - Spring 1; 730 - Synchronizing element. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "XX-1," "XX-2," "XX-3," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0032] This application discloses a neck connection device for full-pressure equipment, such as Figure 1 As shown, it includes a helmet connecting ring 100, a neck collar assembly 200, a locking assembly 500, a neck sealing assembly 300, and a clothing connecting ring 400; as Figure 2 As shown, the helmet connecting ring 100 is sealed and connected to the neck opening 1 of the helmet, as... Figure 4 As shown, the neck ring assembly 200 includes a neck ring and a swivel 210 rotatably fitted onto the neck ring, as... Figure 1 , Figure 7 and Figure 8 As shown, the lock assembly 500 is mounted on the collar assembly 200 and can lock and unlock the rotating ring 210, as... Figure 5 As shown, the neck sealing assembly 300 includes a sealing ring tube 310 and its inflation module, such as Figure 8 As shown, the garment connecting ring 400 is sealed and connected to the neck opening 3 of the fully pressurized garment and is sealed and installed on the neck ring; as Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, the helmet connecting ring 100 has an outward-facing annular groove 101 on its outer side and a downward-facing annular groove 202 on its inner side. The inner side of the neck ring has a radial spring pin 700 and an upward-facing annular cut 231. The lower end of the helmet connecting ring 100 extends into the neck ring assembly 200 and is assembled by the spring pin 700 extending into the annular groove 101. After the rotating ring 210 is unlocked, it can rotate to drive the spring pin 700 to exit and extend into the annular groove 101. The upper side of the sealing ring tube 310 is installed in the annular groove 202, and the lower side faces the annular cut 231. After the sealing ring tube 310 is inflated, it is pressed against the annular cut 231 to achieve a seal.

[0033] This device can quickly switch states by controlling the inflation and deflation of the sealing ring tube 310. When the sealing ring tube 310 is inflated, it is pressed against the ring cutter 231 to achieve a neck seal, allowing the full-pressure equipment to enter the full-pressure state. At this time, under the compression of the sealing ring tube 310, the sealed helmet cannot rotate freely. When the sealing ring tube 310 is deflated, the full-pressure equipment can enter the non-full-pressure state, and the sealed helmet can rotate freely. The device can use the combination of the locking assembly 500, the rotating ring 210, and the neck ring to control the extension and retraction of the spring pin 700, facilitating the insertion and removal of the sealed helmet. This device can be applied in various work scenarios where airtightness of wearable equipment is required, such as full-pressure and gas protection.

[0034] In this embodiment, preferably, as follows: Figure 2 As shown: The helmet connecting ring 100 has an upward-facing annular groove 103 at its upper end. After the helmet neck opening 1 is inserted into the annular groove 103, it is fixed by a pin 2 and sealed with sealant. This design achieves a sealed and reliable connection between the helmet connecting ring 100 and the helmet neck opening 1.

[0035] In this embodiment, preferably, the outer side of the lower end of the helmet connecting ring 100 contacts the inner side of the neck ring. The damping of rotation under non-full pressure conditions after the sealed helmet is worn is adjusted by adjusting the roughness of the contact surface. Although the cooperation between the spring pin 700 and the ring groove 101 can also achieve rotation after the sealed helmet is worn, it cannot control the damping of rotation. For full pressure equipment, excessive rotation speed and excessive amount of rotation will accelerate wear. Therefore, adjusting the frictional damping of the surface contact to adjust the ease of rotation can avoid excessive rotation speed and excessive amount of rotation.

[0036] In this embodiment, preferably, as follows: Figure 1 and Figure 5 As shown: The inflation module of the sealing ring tube 310 includes an inflation tube 340 with a valve 330. The inflation tube 340 is connected to the sealing ring tube 310 through an air nozzle 320. The valve 330 is a solenoid valve or a manual valve, which can be electrically or manually controlled for inflation.

[0037] In this embodiment, preferably, as follows: Figure 4As shown: The spring pin 700 has a pin head 710 at one radially inward end and a spring 720 at the other radially outward end. The pin head 710 and the spring 720 are installed in the mounting groove 232 of the neck ring. Initially, the spring pin 700 is in the extended state and the helmet connecting ring 100 can be directly pressed down for installation (the spring pin 700 is squeezed back during the pressing process, and the spring pin 700 is reset and extended after being pressed down to the end). A synchronizing element 730 is provided on the upper side of the middle of the pin head 710. A protrusion 211 with a variable cross section along the circumference is provided on the inner side of the rotating ring 210. The protrusion 211 contacts the synchronizing element 730 and does not interfere with the helmet connecting ring 100. When the rotating ring 210 rotates in the unlocking direction, the protrusion 211 can drive the pin head 710 to gradually retract through the synchronizing element 730. When the rotating ring 210 rotates in the locking direction, the pin head 710 gradually extends under the action of the spring 720. This configuration allows the rotating ring 210 to rotate and cause the spring pin 700 to retract and extend into the ring groove 101. Furthermore, in the initial state, the sealed helmet can be installed directly without operating the locking assembly 500.

[0038] In this embodiment, preferably, as follows: Figure 4 As shown: The neck ring is assembled from an upper neck ring 220 and a lower neck ring 230. A mounting groove 232 is located on the inner ring of the top surface of the lower neck ring 230. The upper neck ring 220 is located on the top surface of the lower neck ring 230 and covers the spring pin 700. The upper neck ring 220 has a radial straight hole 221, through which the synchronizing element 730 extends upwards. This arrangement facilitates the installation of the spring pin 700. First, the spring pin 700 is inserted into the mounting groove 232, and then the upper neck ring 220 and lower neck ring 230 are assembled, ensuring that the synchronizing element 730 extends through the straight hole 221.

[0039] In this embodiment, preferably, as follows: Figure 3 As shown: The lock assembly 500 includes a lock housing mounted on the outside of the rotating ring 210. Inside the lock housing are a locking pin 550 and a second spring 570, and on the upper outer side is a button 530. The locking pin 550 slides radially with the lock housing and aligns with the lock hole 521 on the lock housing and neck ring. The second spring 570 acts radially on the locking pin 550. The button 530 slides vertically with the lock housing and acts on the locking pin 550. Initially, the locking pin 550 passes through the lock hole 521 on the lock housing and neck ring. Pressing down the button 530 overcomes the force of the second spring 570, causing the locking pin 550 to disengage from the lock hole 521 on the neck ring. In this configuration, pressing the button 530 unlocks the rotating ring 210. Pressing the button 530 and rotating the rotating ring 210 further causes the spring pin 700 to disengage from the ring groove 101, thus allowing the sealed helmet to be removed upwards.

[0040] In this embodiment, preferably, as follows: Figure 3As shown: The lock housing is assembled from a housing 520 and a cover 560. The housing 520 has a lock hole 521 and a housing through hole 522 on its inward-facing side. The housing through hole 522 is located on both sides of the lock hole 521. The cover 560 covers the missing top surface and outward-facing side of the housing 520. A connecting rod 540 is provided on the locking pin 550. The connecting rod 540 has connecting rod through holes 541 on both sides of the locking pin 550. The top surface of the cover 560 has a guide hole 561, and the side surface has a mounting hole 562. A guide screw 510 passes sequentially through the corresponding housing through hole 522, connecting rod through hole 541, and spring 570 before being installed in the mounting hole 562. The button 530 slides within the guide hole 561, and its lower end acts on the connecting rod 540 through the arc-shaped surface 531. This design facilitates the installation of the locking pin 550, spring 570, and button 530.

[0041] In this embodiment, preferably, as follows: Figure 1 and Figure 3 As shown: A positioning seat 600 is provided on the outer side of the neck ring, and a circumferential hole 212 is provided on the rotating ring 210. The positioning seat 600 passes through the circumferential hole 212 without interference, and the lock case is initially limited by the positioning seat 600. This setting allows the rotating ring 621 to return to its initial position accurately.

[0042] In this embodiment, preferably, as follows: Figure 6 As shown: The garment connecting ring 400 is sealed to the neck opening 3 of the fully pressurized garment by a sealing gasket 4 and fixed by a screw 5.

[0043] The helmet connecting ring 100, upper neck ring 220, lower neck ring 230, swivel 210, and clothing connecting ring 400 can be made of any suitable metal material, including but not limited to aluminum, titanium, steel, etc. The specific shape and size can be adjusted according to the actual wearability of the person. The sealing ring tube 310, inflation tube 340, and sealing gasket 4 can be made of any suitable flexible material, including but not limited to rubber, plastic, silicone, etc. The specific shape and size can be adjusted as needed.

[0044] Initially, such as Figure 7 As shown, the sealed helmet is installed directly downwards without operating the locking assembly 500. At this point, the sealed helmet can rotate normally and is in a non-full-pressure state. To enter the full-pressure state, the sealing ring tube 310 is inflated. Under full-pressure conditions, the neck is airtight, and the sealed helmet remains stationary. To remove the sealed helmet, first deflate the sealing ring tube 310, as shown... Figure 8 As shown, by operating the locking assembly 500 and the rotating ring 210, the sealed helmet can be removed.

[0045] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A neck connection device for fully pressurized equipment, characterized in that: The device includes a helmet connecting ring, a neck ring assembly, a locking assembly, a neck sealing assembly, and a garment connecting ring. The helmet connecting ring is sealed to the neck opening of the helmet. The neck ring assembly includes a neck ring and a rotating ring that is rotatably fitted onto the neck ring. The locking assembly is mounted on the neck ring assembly and can lock and unlock the rotating ring. The neck sealing assembly includes a sealing ring tube and its inflation module. The garment connecting ring is sealed to the neck opening of the full-pressure garment and is sealed to the neck ring. The helmet connecting ring has an outward-facing annular groove 1 on its outer side and a downward-facing annular groove 2 on its inner side. The neck ring has a radial spring pin and an upward-facing ring cut on its inner side. The lower end of the helmet connecting ring extends into the neck ring assembly and is assembled by the spring pin extending into the annular groove 1. After the rotating ring is unlocked, it can rotate to drive the spring pin out and into the annular groove 1. The upper side of the sealing ring tube is installed in the annular groove 2, and the lower side faces the ring cut. After the sealing ring tube is inflated, it is pressed against the ring cut to achieve a seal.

2. The neck connection device for total pressure equipment as described in claim 1, characterized in that: The upper end of the helmet connecting ring has an upward-facing groove three. After the helmet neck opening is inserted into the groove three, it is fixed by a pin and sealed by filling the groove three with sealant.

3. The neck connection device for total pressure equipment as described in claim 1, characterized in that: The outer side of the lower end of the helmet connecting ring contacts the inner side of the neck ring. The damping of rotation under non-full pressure after the sealed helmet is worn can be adjusted by adjusting the roughness of the contact surface.

4. The neck connection device for total pressure equipment as described in claim 1, characterized in that: The air inflation module of the sealing ring tube includes an inflation tube with a valve. The inflation tube is connected to the sealing ring tube through an air nozzle. The valve is a solenoid valve or a manual valve.

5. The neck connection device for total pressure equipment as described in claim 1, characterized in that: The spring pin has a pin head at one radially inward end and a spring at the other radially outward end. The pin head and spring are installed in the mounting groove of the neck ring. Initially, the spring pin is in the extended state and the helmet connecting ring can be directly pressed down for installation. A synchronizing element is provided on the upper side of the middle of the pin head. A protrusion with a variable cross-section along the circumference is provided on the inner side of the rotating ring. The protrusion contacts the synchronizing element but does not interfere with the helmet connecting ring. When the rotating ring rotates in the unlocking direction, the protrusion can drive the pin head to gradually retract through the synchronizing element. When the rotating ring rotates in the locking direction, the pin head gradually extends under the action of spring.

6. The neck connection device for total pressure equipment as described in claim 5, characterized in that: The neck ring is assembled from an upper neck ring and a lower neck ring. The mounting groove is located on the inner ring of the top surface of the lower neck ring. The upper neck ring is located on the top surface of the lower neck ring and covers the spring pin. The upper neck ring has a radial straight hole, through which the synchronizing element passes upward.

7. The neck connection device for total pressure equipment as described in claim 1, characterized in that: The lock assembly includes a lock housing mounted on the outside of the swivel. Inside the lock housing are a locking pin and a second spring, and on the upper outer side is a button. The locking pin slides radially with the lock housing and aligns with the keyholes on the lock housing and the neck ring. The second spring acts radially on the locking pin. The button slides vertically with the lock housing and acts on the locking pin. Initially, the locking pin passes through the keyholes on the lock housing and the neck ring. When the button is pressed down, it overcomes the force of the second spring and drives the locking pin out of the keyhole on the neck ring.

8. The neck connection device for total pressure equipment as described in claim 7, characterized in that: The lock case is assembled from a housing and a cover. The housing has a lock hole and a housing through hole on its inner side. The housing through hole is located on both sides of the lock hole. The cover covers the missing top surface and the outer side of the housing. The lock pin has a connecting rod. The connecting rod has connecting rod through holes on both sides of the lock pin. The top surface of the cover has a guide hole and the side has a mounting hole. The guide screw passes through the corresponding housing through hole, connecting rod through hole and spring two in sequence and is then installed on the mounting hole. The button slides in the guide hole and its lower end acts on the connecting rod through the arc surface.

9. The neck connection device for total pressure equipment as described in claim 7, characterized in that: A positioning seat is provided on the outside of the neck ring, and a circumferential hole is provided on the rotating ring. The positioning seat passes through the circumferential hole without interference, and the lock case is initially limited by the positioning seat.

10. The neck connection device for total pressure equipment as described in claim 1, characterized in that: The garment connecting ring is sealed to the neck opening of the fully pressurized garment by a sealing gasket and fastened by screws.

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