Sterile connecting sleeve of ultrasonic knife handle

Abstract

The invention discloses an ultrasonic scalpel handle sterile connecting sleeve, and relates to the technical field of medical instruments, the ultrasonic scalpel handle sterile connecting sleeve comprises a fixing cylinder, a sealing member, a fixing member and a protective sleeve, the protective sleeve is used for sterile protection of the tail part of a scalpel handle part and a cable thereof; the bottom of the fixing cylinder is provided with an opening used for buckling the fixing cylinder on the tool bit part, and the opening enables the fixing cylinder to form a semi-open type inverted-U-shaped cover-shaped structure. The sealing piece comprises an air bag ring which surrounds the edge of the opening by a circle and is embedded in the fixing cylinder, and an inflation piece used for inflating the air bag ring. The fixing piece comprises a first pull rope used for hanging the front end of the tool bit part, a second pull rope used for hanging a handle of the tool bit part and a positioning piece used for abutting against the top face of the tool bit part. The fixing cylinder is buckled at the top of the handle of the scalpel head part, and a gap is filled through the air bag ring, so that the ultrasonic scalpel is adaptive to various ultrasonic scalpels, and the adaptability is higher; the fixing cylinder is tensioned and fixed on the tool bit handle through the two pull ropes, traditional binding is replaced, and operation is easy and convenient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a sterile connecting sleeve for an ultrasonic scalpel handle. Background Technology

[0002] The main components of an ultrasonic scalpel include the main unit, a handle with a cable, and a scalpel head connected to the handle. The scalpel head, consisting of a shaft and a grip, is a disposable consumable and must be sterile. The main unit, as an external device, does not require sterility. However, the handle with the cable, being a non-disposable consumable directly connected to the scalpel head, requires sterility. Therefore, when connecting the scalpel head, a sterile connecting sleeve is needed for protection. Traditional sterile connecting sleeves are usually long plastic film bags that are directly tied to the scalpel head, covering the handle and cable. Although this is compatible with most ultrasonic scalpels, the process is cumbersome. The scrub nurse needs to pinch the outer surface of the front end of the film bag and then wrap the rest around their arm to receive the handle from the circulating nurse, preventing the outer surface of the film bag from contacting the handle. The circulating nurse then pulls the film bag to cover the handle and cable, and finally, the scrub nurse secures it. Throughout this process, the outer surface of the film bag is highly susceptible to contamination, failing to effectively provide sterile protection, and it is heavily reliant on the operator's experience and cooperation.

[0003] Currently, some new sterile sleeves are available to simplify the operation process for operators. For example, Chinese patent CN105816245B discloses a sterile protective sleeve for an ultrasonic scalpel handle. Its main components are an integrally molded mounting part and a protective part. The mounting part is fixed to the handle of the scalpel head through a slot on the mounting part and an adhesive layer. Although most scalpel heads from various manufacturers are gun-shaped, their size and detailed shape still vary slightly. The slot of the mounting part in this patent needs to fit perfectly with the handle of the scalpel head to achieve sterility requirements. This makes it difficult to adapt well to scalpel heads from different manufacturers. At the same time, during the process of the slot sliding into the handle, the adhesive layer will stick to the surface of the handle in advance, making installation inconvenient. Therefore, there is an urgent need for a sterile connecting sleeve that can be adapted to various models of ultrasonic scalpels and is easy to operate to meet the current clinical needs. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by providing a sterile connecting sleeve for ultrasonic scalpel handles, thereby addressing the issues of poor adaptability and inconvenient operation of current sterile connecting sleeves.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: an ultrasonic scalpel handle sterile connecting sleeve, comprising a fixing cylinder, a sealing element, a fixing element, and a protective sleeve, wherein the protective sleeve is used for sterile protection of the tail of the scalpel handle and its cable; the bottom of the fixing cylinder has an opening for fastening the fixing cylinder to the scalpel head, the opening making the fixing cylinder form a semi-open inverted U-shaped cap structure; the sealing element includes an air bladder ring embedded in the fixing cylinder around the edge of the opening and an inflation element for inflating the air bladder ring, wherein the air bladder ring can fit against the surface of the scalpel head after inflation; the fixing element includes a first pull rope for hanging the front end of the scalpel head, a second pull rope for hanging the handle of the scalpel head, and a positioning element for abutting the top surface of the scalpel head, wherein both ends of the first pull rope and both ends of the second pull rope are connected to a locking component on the fixing cylinder.

[0006] Furthermore, the tail end of the fixed cylinder is connected to one end of the protective sleeve via a threaded interface. Inside the cavity of the protective sleeve, there is a folded-in bag for covering the handle and its cable. The tail end of the bag is connected to a tail ring, which is engaged with the other end of the protective sleeve.

[0007] Furthermore, a number of first limiting rings are provided inside the fixed cylinder, and a number of second limiting rings are provided inside the protective sleeve. Both the first and second limiting rings can undergo elastic deformation to fit the surface of the tool holder. An adhesive ring is provided on the surface of the tail ring.

[0008] Furthermore, a sealing ring is fitted at the connection between the fixed cylinder and the protective sleeve, a positioning hole is provided on the protective sleeve, and an elastic positioning block is provided on the fixed cylinder. The elastic positioning block can deform relative to the fixed cylinder, and its position corresponds to the positioning hole.

[0009] Furthermore, the locking assembly includes a locking cylinder fixedly mounted on the fixed cylinder, a ratchet rotatably mounted on the top of the locking cylinder, and a spool fixedly connected to the bottom surface of the ratchet. Both ends of the first pull rope and both ends of the second pull rope are wound onto the spool. The locking cylinder is provided with an elastic pawl, which engages in the inclined groove on the ratchet.

[0010] Furthermore, a first groove and a second groove are respectively provided on the periphery of the ratchet, and a number of inverted L-shaped elastic blocks are provided on the top surface of the locking cylinder, with the top of the elastic blocks located in the first groove.

[0011] Furthermore, a handwheel is provided on the top of the ratchet, and anti-slip grooves are provided around the handwheel.

[0012] Furthermore, the airbag ring is connected to the inflation component via a connecting pipe with a one-way valve, and the airbag ring is equipped with a deflation valve. The inflation component is a compression balloon with a one-way air intake valve.

[0013] Furthermore, both the first and second pull ropes are elastic, and both have pads in their middle sections to increase the contact area with the blade head surface. The positioning element is fixedly installed on the top surface of the inner wall of the fixed cylinder and is elastic, allowing it to deform.

[0014] The principles and beneficial effects of the technical solution are as follows:

[0015] This invention provides a sterile connecting sleeve for an ultrasonic scalpel handle. A semi-open fixing sleeve is fastened to the top of the handle of the scalpel head. By operating the inflation device, the air bladder ring at the opening edge of the fixing sleeve inflates, filling the gap between the fixing sleeve and the scalpel head handle. Furthermore, the flexible deformation of the air bladder ring tightly adheres to the surface of the scalpel head handle, achieving a seal. This makes the sterile connecting sleeve compatible with various ultrasonic scalpels, enhancing its adaptability. A first pull rope hooks onto the groove at the front end of the scalpel head, and a second pull rope hooks onto the grip of the scalpel head handle. Pulling and locking these two ropes counteracts the upward elastic force provided by the positioning device, thus securely fixing the fixing sleeve to the scalpel head handle, replacing traditional binding methods. A protective sleeve covers the handle and cables, and finally connects to the fixing sleeve. The operation is simple and convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a sterile connecting sleeve for an ultrasonic scalpel handle according to the present invention;

[0017] Figure 2 This is a schematic diagram of the assembly structure of a sterile connecting sleeve for an ultrasonic scalpel handle according to the present invention;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a partial cross-sectional view of an ultrasonic scalpel handle sterile connecting sleeve according to the present invention;

[0020] Figure 5 This is a bottom view of the fixing cylinder in the sterile connecting sleeve of the ultrasonic scalpel handle according to the present invention;

[0021] Figure 6 This is a schematic diagram of a fixing sleeve in an ultrasonic scalpel handle aseptic connecting sleeve installed on the scalpel head according to the present invention;

[0022] Figure 7 This is a cross-sectional view of a protective sleeve covering the handle and cable in a sterile connecting sleeve for an ultrasonic scalpel handle according to the present invention.

[0023] Figure 8 This is a schematic diagram of an ultrasonic scalpel handle sterile connecting sleeve installed on the assembled scalpel head and handle.

[0024] Figure 9 This is a schematic diagram showing the usage state of the sterile connecting sleeve for an ultrasonic scalpel handle according to the present invention.

[0025] The corresponding labels in the attached diagram are named as follows: 1. Fixed cylinder; 101. First pull rope; 102. Second pull rope; 103. Positioning component; 104. First limiting ring; 105. Sealing ring; 106. Elastic positioning block; 107. Opening; 108. Gasket; 2. Protective sleeve; 201. Bag; 202. Tail ring; 203. Second limiting ring; 204. Positioning hole; 3. Airbag ring; 301. Inflating component; 302. Deflator; 4. Locking cylinder; 401. Elastic pawl; 402. Ratchet; 403. Spool; 404. First slide groove; 405. Second slide groove; 406. Elastic locking block; 407. Handwheel; 5. Blade head; 6. Blade handle. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be described in further detail below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this invention can be combined with each other. The invention will now be described in detail with reference to the embodiments.

[0028] Example: Figures 1-9 As shown, an ultrasonic scalpel handle sterile connecting sleeve includes a fixing cylinder 1, a sealing element, a fixing element, and a protective sleeve 2. The threaded connection section of the protective sleeve 2 is a rigid sleeve, while the remaining sections are flexible sleeves that can deform under stress. The protective sleeve 2 can be connected to the fixing cylinder 1. The protective sleeve 2 is used for sterile protection of the tail of the scalpel handle 6 and its cable. The bottom of the fixing cylinder 1 has an opening 107 for fastening the fixing cylinder 1 to the scalpel head 5. The opening 107 makes the fixing cylinder 1 form a semi-open inverted U-shaped cap structure, which is a rigid shell, and its size is slightly larger than the size of the top of the existing common ultrasonic scalpel handle. The sealing element includes a bypassing... An airbag ring 3 is embedded in the fixed cylinder 1 around the edge of the opening 107, and an inflation component 301 is used to inflate the airbag ring 3. After inflation, the airbag ring 3 can fit against the handle surface of the blade head 5. By filling the gaps with the airbag ring 3, a seal can be achieved, and it can also adapt to gaps of different sizes, thereby improving adaptability. The fixing component includes a first pull rope 101 for hanging the front end of the blade head 5, a second pull rope 102 for hanging the handle of the blade head 5, and a positioning component 103 for abutting the top surface of the blade head 5. Both ends of the first pull rope 101 and both ends of the second pull rope 102 are connected to the locking component on the fixed cylinder 1.

[0029] This sterile connecting sleeve is a disposable consumable, packaged in a sterile packaging bag. In use, the scrub nurse first removes the fixing sleeve 1 and protective sleeve 2 from the sterile packaging. The scrub nurse then places the fixing sleeve 1 through the opening 107 onto the top of the handle on the blade head 5. The first pull rope 101 is hung on the front end of the blade head 5, and the second pull rope 102 is hung on the handle of the blade head 5. The first pull rope 101 and the second pull rope 102 are then tightened and secured, pulling the fixing sleeve 1 forward and downward towards the blade head 5. Simultaneously, the positioning element 103 inside the fixing sleeve 1 presses against the top of the handle of the blade head 5, providing an upward force to the fixing sleeve 1, counteracting the force of the two pull ropes, thus securely fixing the fixing sleeve 1 to the blade head 5. Next, by repeatedly operating the inflation element 301, the airbag ring 3 is inflated, causing the originally deflated airbag ring 3 to expand and deform. After expansion and deformation, the airbag ring 3 can tightly fit the surface of the handle of the blade head 5. First, the gap between the opening 107 on the fixing cylinder 1 and the surface of the handle of the knife head 5 is filled, and the shape of the handle surface can be adapted to achieve a sealing effect, thus completing the adaptation and installation of the knife head 5. Then, the scrub nurse holds the protective sleeve 2 still, and the circulating nurse holds the rear end of the knife handle 6, inserts the front end of the knife handle 6 into the protective sleeve 2, and the scrub nurse pinches the flexible sleeve part of the rear section of the protective sleeve 2, thereby pinching the knife handle 6 through the protective sleeve 2 to keep it inside the protective sleeve 2. Then, the protective sleeve 2 is unfolded to cover the knife handle 6 and the cable at its rear end. Then, the protective sleeve 2 is connected to the fixing cylinder 1, and finally the knife handle 6 is inserted into the fixing cylinder 1 and installed onto the knife head 5. The whole process is simple to operate. The knife handle 6, which is considered to be contaminated, is covered inside the protective sleeve 2, which effectively reduces the chance of contamination of the outer surface of the protective sleeve 2, and also reduces the dependence on the experience and cooperation of the operator, making the operation and use simpler and more convenient.

[0030] In this embodiment, the tail end of the fixing cylinder 1 is connected to one end of the protective sleeve 2 via a threaded interface. A sleeve 201 for covering the knife handle 6 and its cables is folded into the cavity inside the protective sleeve 2. The tail end of the sleeve 201 is connected to a tail ring 202, which is engaged with the other end of the protective sleeve 2. After the knife handle 6 is inserted into the protective sleeve 2, the scrub nurse pulls the tail ring 202, causing it to extend the sleeve 201 a short distance outside the protective sleeve 2, covering the tail end of the knife handle 6 and part of the cables. The circulating nurse then continues to pull the tail ring 202 until all cables are covered. The scrub nurse can then quickly fix the protective sleeve 2 to the fixing cylinder 1 via the threaded connection, completing the sealed assembly and achieving external sterility.

[0031] In this embodiment, a plurality of first limiting rings 104 are provided inside the fixing cylinder 1, and a plurality of second limiting rings 203 are provided inside the protective sleeve 2. The second limiting rings 203 are located in the rigid sleeve section of the loose protective sleeve 2. Both the first limiting rings 104 and the second limiting rings 203 can undergo elastic deformation to fit against the surface of the handle 6. An adhesive ring is provided on the surface of the tail ring 202. Both the first limiting rings 104 and the second limiting rings 203 are elastic components that can fit tightly against the surface of the handle 6, thereby providing auxiliary support and fixation for the fixing cylinder 1 and the protective sleeve 2. The adhesive ring on the tail ring 202 can be adhered to the main unit of the ultrasonic scalpel, thereby covering the entire cable and preventing the sleeve 201 from moving on the cable when the cable is pulled.

[0032] In this embodiment, a sealing ring 105 is fitted at the connection between the fixed cylinder 1 and the protective sleeve 2. The protective sleeve 2 has a positioning hole 204, and the fixed cylinder 1 is provided with an elastic positioning block 106. The elastic positioning block 106 can deform relative to the fixed cylinder 1, and its position corresponds to the positioning hole 204. The sealing ring 105 has a certain thickness. When the protective sleeve 2 is connected to the fixed cylinder 1 by threads, it will compress the sealing ring 105, thereby reducing the connection gap between the protective sleeve 2 and the fixed cylinder 1. When the protective sleeve 2 is screwed onto the fixed cylinder 1 and tightened to the correct position, the elastic positioning block 106 on the fixed cylinder 1 will engage with the positioning hole 204 on the protective sleeve 2 under its own elasticity, and the two will make a clicking sound, thereby reminding the instrument nurse to tighten it to the correct position and avoiding damage due to over-tightening or affecting the sealing performance due to insufficient tightening.

[0033] In this embodiment, the locking assembly includes a locking cylinder 4 fixedly mounted on the fixing cylinder 1, a ratchet 402 rotatably mounted on the top of the locking cylinder 4, and a spool 403 fixedly connected to the bottom surface of the ratchet 402. Both ends of the first pull rope 101 and the second pull rope 102 are wound onto the spool 403. The spool 403 is hollow and fits onto a column inside the locking cylinder 4 to improve its stability. The locking cylinder 4 is equipped with an elastic pawl 401, which engages in a groove on the ratchet 402. The elastic pawl 401, under its own elasticity, remains tilted and engaged in the groove, thus providing one-way locking to the ratchet 402. After the scrub nurse hangs the first pull rope 101 and the second pull rope 102 at the corresponding positions on the blade head 5, the scrub nurse only needs to rotate the ratchet 402 to rotate the spool 403, thereby tightening and locking the two pull ropes. This method of securing the fixing cylinder 1 with the pull ropes replaces the traditional manual binding method, making the operation simpler and more convenient.

[0034] In this embodiment, the ratchet 402 is provided with a first groove 404 and a second groove 405 on its periphery, and the top surface of the locking cylinder 4 is provided with a plurality of inverted L-shaped elastic blocks 406, with the top of the elastic blocks 406 located in the first groove 404. The ratchet 402 is positioned by engaging the inverted L-shaped elastic block 406 within the first slide groove 404, allowing it to rotate stably on the locking cylinder 4. Lifting the ratchet 402 upwards causes the first slide groove 404 to compress the elastic block 406. The elastic segment connecting the elastic block 406 to the locking cylinder 4 deforms under this pressure, forcing the locking portion of the elastic block 406 to disengage from the first slide groove 404. Continuing to lift the ratchet 402 aligns the second slide groove 405 with the locking portion of the elastic block 406, causing the locking portion to engage within the second slide groove 405, thus limiting the ratchet 402 again. At this point, the inclined groove at the bottom of the ratchet 402 completely separates from the elastic pawl 401, releasing the lock on the ratchet 402. This allows the scrub nurse to reverse the ratchet 402, loosen the two pull ropes, and remove the fixing cylinder 1 without damaging the components of the sterile connecting sleeve, improving its fault tolerance and facilitating adjustments by the scrub nurse.

[0035] In this embodiment, a handwheel 407 is provided on the top of the ratchet 402, and anti-slip grooves are formed on the periphery of the handwheel 407. The handwheel 407 with anti-slip grooves allows the instrument nurse to easily and effortlessly rotate or lift the ratchet 402, improving its acceptability.

[0036] In this embodiment, the airbag ring 3 is connected to the inflator 301 via a connecting pipe with a one-way air intake valve, and the airbag ring 3 is equipped with a deflation valve 302. The inflator 301 is a press-type balloon with a one-way air intake valve. The press-type balloon with a one-way air intake valve can be repeatedly pressed, has a simple structure, and is easy to implement. With the connecting pipe with the one-way air intake valve, the airbag ring 3 is continuously inflated, preventing gas leakage from the airbag ring 3. When disassembling, simply opening the deflation valve 302 releases the air from the airbag ring 3.

[0037] In this embodiment, both the first pull rope 101 and the second pull rope 102 are elastic, and both are provided with a pad 108 in the middle section to increase the contact area with the surface of the blade head 5. The positioning member 103 is fixedly installed on the top surface of the inner wall of the fixing cylinder 1 and is elastic and can deform. The first pull rope 101 and the second pull rope 102, which have a certain degree of elasticity, can provide elasticity. Continuously tightening the pull ropes can increase the elasticity. With appropriate tightening force, the fixing cylinder 1 can be more firmly fixed to the handle of the blade head 5, improving its reliability and stability. The pad 108 can increase the contact area between the two pull ropes and the blade head 5, preventing the two pull ropes from slipping off. The positioning member 103, which can deform and is relatively hard, presses against the top of the handle of the blade head 5, forming a counterforce with the two pull ropes, more firmly fixing the fixing cylinder 1 and keeping the fixing cylinder 1 in a suitable position, so that the gap between the opening 107 on the fixing cylinder 1 and the handle of the blade head 5 is more uniform, which makes it easier for the airbag ring 3 to fill the gap more evenly.

[0038] The above specific embodiments are merely explanations of the present invention and are not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An ultrasonic blade handle aseptic connection sleeve, characterized in that: The utility model relates to a sterile protection device for surgical knife, including fixed cylinder (1), sealing piece, fixed part and protective sleeve (2), the protective sleeve (2) is used for the sterile protection of knife handle portion (6) tail and its cable, the bottom of fixed cylinder (1) is opened with the opening (107) for the opening of fixed cylinder (1) is buckled on the knife head (5) on, the opening (107) makes fixed cylinder (1) form half open type inverted U-shaped cover structure, the sealing piece includes the airbag ring (3) that inlays in fixed cylinder (1) around the opening (107) edge a week and is used for the inflation of airbag ring (3) inflation piece (301), airbag ring (3) can adhere to the knife head (5) surface after inflation, the fixed part includes the first drawstring (101) for hanging the front end of knife head (5), the second drawstring (102) for hanging the handle of knife head (5) and the positioning part (103) for abutting against the top surface of knife head (5), both ends of first drawstring (101) are connected with the locking assembly on fixed cylinder (1) with both ends of second drawstring (102).

2. The sterile coupling sleeve for an ultrasonic blade handle according to claim 1, wherein: The tail end of fixed cylinder (1) is connected with one end of protective sleeve (2) through threaded interface, the sleeve bag (201) for covering knife handle portion (6) and its cable is folded in the cavity in protective sleeve (2), the tail end of sleeve bag (201) is connected with tail ring (202), and tail ring (202) is clamped in the other end of protective sleeve (2).

3. The sterile coupling sleeve for an ultrasonic blade handle according to claim 2, wherein: A plurality of first limiting rings (104) are arranged in fixed cylinder (1), a plurality of second limiting rings (203) are arranged in protective sleeve (2), the first limiting ring (104) and the second limiting ring (203) can be elastically deformed, and are used for adhering to the surface of knife handle portion (6), the surface of tail ring (202) is provided with a glue ring.

4. The sterile coupling sleeve for an ultrasonic blade handle of claim 2, wherein: A sealing ring (105) is sleeved at the connection between fixed cylinder (1) and protective sleeve (2), a positioning hole (204) is formed in protective sleeve (2), and an elastic positioning block (106) is arranged on fixed cylinder (1), the elastic positioning block (106) can be deformed relative to fixed cylinder (1), and the position corresponds to the positioning hole (204).

5. The sterile coupling sleeve for an ultrasonic blade handle of claim 1, wherein: The locking assembly includes a locking cylinder (4) fixedly arranged on fixed cylinder (1), a ratchet wheel (402) rotatably arranged on the top of locking cylinder (4), and a spool (403) fixedly connected to the bottom surface of ratchet wheel (402), both ends of first drawstring (101) and both ends of second drawstring (102) are wound on spool (403), and an elastic pawl (401) is arranged on locking cylinder (4), the elastic pawl (401) is clamped in the inclined slot on ratchet wheel (402).

6. An aseptic connecting sleeve for an ultrasonic blade handle according to claim 5, characterized in that: First sliding groove (404) and second sliding groove (405) are formed in the circumferential side of ratchet wheel (402), a plurality of inverted L-shaped elastic clamping blocks (406) are arranged on the top surface of locking cylinder (4), and the top of elastic clamping block (406) is located in first sliding groove (404).

7. The sterile coupling sleeve for an ultrasonic blade handle according to claim 6, wherein: The ratchet wheel (402) is provided with a hand wheel (407) on top, and the hand wheel (407) is provided with anti-skid grooves on the side.

8. The sterile coupling sleeve of claim 1, wherein: The air bag ring (3) is connected with the inflator (301) through a connecting pipe with a one-way valve, and the air bag ring (3) is provided with a deflation valve (302), and the inflator (301) is a pressing balloon with a one-way air inlet valve.

9. The sterile coupling sleeve for an ultrasonic blade handle of claim 5, wherein: The first pull rope (101) and the second pull rope (102) are both elastic, and the middle sections of the two are both provided with gaskets (108) for increasing the surface contact area with the cutter head (5).

10. The sterile coupling sleeve for an ultrasonic blade handle according to claim 1, wherein: The inner wall of the air bag ring (3) is compounded with a layer of high-elastic soft rubber layer, and the high-elastic soft rubber layer can be deformed together with the air bag ring (3). The inner wall of the air bag ring (3) is compounded with a layer of high-elastic soft rubber layer, and the high-elastic soft rubber layer can be deformed together with the air bag ring (3).

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