CN215024345U

CN215024345U - Oxygen inhalation tube

Info

Publication number: CN215024345U
Application number: CN202120457004.8U
Authority: CN
Inventors: 肖婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-12-07
Anticipated expiration: 2031-03-03

Abstract

The utility model relates to an oxygen tube, belonging to the field of medical apparatus. The oxygen inhalation device comprises a first oxygen inhalation tube, a second oxygen inhalation tube, a third oxygen inhalation tube, a telescopic oxygen inhalation tube, oxygen inhalation tube nose plugs, an adjusting and fixing device and a hanging lug device, wherein the telescopic oxygen inhalation tube is symmetrically provided with two oxygen inhalation tube nose plugs, each oxygen inhalation tube nose plug is surrounded by sponge, the adjusting and fixing device is connected with the telescopic oxygen inhalation tube and is used for adjusting the distance between the two oxygen inhalation tube nose plugs, the first oxygen inhalation tube and the second oxygen inhalation tube are respectively connected with a hanging lug device, the hanging lug device comprises a telescopic connecting rod, a first arc-shaped hanging lug, an arc-shaped telescopic rod and a second arc-shaped hanging lug, one end of the telescopic connecting rod is connected with the first oxygen inhalation tube or the second oxygen inhalation tube, the other end of the telescopic connecting rod is respectively hinged with one end of the first arc-shaped hanging lug and one end of the second arc-shaped hanging lug, one end of the arc-shaped telescopic rod is connected with the other end of the first arc-shaped hanging lug, the other end of the telescopic rod is connected with the other end of the first arc-shaped hanging lug, the use is convenient, has better comfort level and is not easy to fall off.

Description

Oxygen inhalation tube

Technical Field

The utility model relates to the technical field of medical equipment, particularly, relate to an oxygen tube.

Background

Oxygen inhalation means inhaling oxygen. Is a common treatment method in clinic, and oxygen therapy is mainly a method for relieving hypoxia. A proper amount of oxygen inhalation is used for correcting oxygen deficiency, improving the arterial oxygen partial pressure and the oxygen saturation level and promoting metabolism, and is one of important methods for adjuvant therapy of various diseases.

The common methods include a nasal obstruction and nasal catheter oxygen inhalation method, a mask oxygen inhalation method and a peroral oxygen inhalation method, the nasal catheter method is to insert a catheter into the top of a nasal cavity to inhale oxygen, the oxygen inhalation tube is commonly used, the existing oxygen inhalation tube has poor comfort level when used, is easy to tighten the nose, ears and cheeks, is easy to drop when used, and is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

To foretell not enough among the prior art, the utility model provides an oxygen tube, the device is simple, and convenient to use has better comfort level, is difficult to drop.

In order to achieve the above object, the utility model discloses a solution is:

an oxygen uptake tube comprises a first oxygen uptake tube, a second oxygen uptake tube, a third oxygen uptake tube, a telescopic oxygen uptake tube, an oxygen uptake tube nasal plug, an adjusting and fixing device and a hanging lug device, wherein one end of the first oxygen uptake tube is communicated with one end of the telescopic oxygen uptake tube, the other end of the first oxygen uptake tube is communicated with the third oxygen uptake tube, one end of the second oxygen uptake tube is communicated with the other end of the telescopic oxygen uptake tube, the other end of the second oxygen uptake tube is communicated with the third oxygen uptake tube, the telescopic oxygen uptake tube is symmetrically provided with two oxygen uptake tube nasal plugs, each oxygen uptake tube nasal plug is surrounded by a sponge, the adjusting and fixing device is connected with the telescopic oxygen uptake tube and is used for adjusting the distance between the two oxygen uptake tube nasal plugs, the first oxygen uptake tube and the second oxygen uptake tube are respectively connected with a hanging lug device, each hanging lug device comprises a telescopic connecting rod, a first arc-shaped hanging lug, an arc-shaped telescopic rod and a second arc-shaped hanging lug, one end of the telescopic rod is connected with the first oxygen uptake tube or the second oxygen uptake tube, the other end is articulated with the one end of first arc hangers and the one end of second arc hangers respectively, and the one end and the other end of first arc hangers of arc telescopic link are connected, and the other end is connected with the other end of first arc hangers.

Further, the utility model discloses in the embodiment of the preferred, flexible oxygen tube includes first flexible oxygen tube and the flexible oxygen tube of second, the one end and the first oxygen tube intercommunication of first flexible oxygen tube, the other end and the flexible one end of oxygen tube of second slip intercommunication, the other end and the flexible one end of oxygen tube of second intercommunication of oxygen tube of second, first flexible oxygen tube and the flexible oxygen tube of second all are provided with oxygen tube nose chock plug.

Furthermore, in the preferred embodiment of the present invention, the end of the nasal plug of the oxygen inhalation tube, which is away from the telescopic oxygen inhalation tube, is arc-shaped.

Further, the utility model discloses in the embodiment of preferred, adjust fixing device includes the first riser, the second riser, first diaphragm, the second diaphragm, spring and bolt, the one end and the first flexible oxygen tube of first riser are connected, the other end is connected with the one end of first diaphragm, the one end and the flexible oxygen tube of second riser are connected, the other end is connected with the one end of second diaphragm, the one end and the other end of first diaphragm of spring are connected, the other end and the other end of second diaphragm of spring are connected, the one end that first riser was kept away from to first diaphragm has seted up threaded hole, the one end of bolt sets up in the screwed hole, the other end extends towards the direction of second diaphragm.

Further, in the preferred embodiment of the present invention, the end of the second transverse plate away from the second vertical plate is provided with a groove matched with the bolt.

Further, the utility model discloses in the embodiment of the preferred, the telescopic link includes first telescopic link and second telescopic link, and the one end and the first oxygen tube or the second oxygen tube of first telescopic link are connected, and the other end slides and cup joints in with the second telescopic link.

Further, in the preferred embodiment of the present invention, a plurality of first positioning holes are disposed at the first telescopic connecting rod interval, and a plurality of second positioning holes matched with the first positioning holes are disposed at the second telescopic connecting rod interval.

Further, the utility model discloses in the embodiment of the preferred, the one end that first arc hangers is close to second arc hangers and the one end that second arc hangers is close to first arc hangers all are provided with the sponge.

The utility model provides an oxygen tube's beneficial effect is: the distance between the nasal plugs of the two oxygen inhalation tubes is adjusted through the adjusting and fixing device and the telescopic oxygen inhalation tube, and the adjustment is carried out according to the requirements of different patients so as to adapt to the distance between the nostrils of different patients and improve the comfort of the patients; the sponge surrounds each oxygen inhalation tube nasal plug, the sponge can relatively fix the oxygen inhalation tube nasal plugs, the stability of the oxygen inhalation tube nasal plugs during oxygen inhalation is improved, the oxygen inhalation effect is improved, and meanwhile, the use of the sponge can avoid the friction of the oxygen inhalation tube nasal plugs on the nose of a patient and the stimulation to nasal mucosa, so that the oxygen inhalation effect of the patient is further improved; when oxygen is inhaled, the ear hanging device is hung on the ears of a patient, so that the use stability of the oxygen inhalation tube is improved, the oxygen inhalation tube is prevented from falling off during oxygen inhalation, meanwhile, the ear hanging device is independently used, the oxygen inhalation tube does not need to be wound on the patient, the reining injury to the nose, the ears and the cheeks of the patient is avoided, and the use comfort level of the patient is further improved; the hanger device comprises a telescopic connecting rod, a first arc-shaped hanger, an arc-shaped telescopic rod and a second arc-shaped hanger, the length between the arc-shaped hanger and the oxygen inhalation tube is adjusted through the telescopic connecting rod, and the length is adjusted according to the requirements of different patients, so that the use comfort of the patients is improved; adjust the space size that first arc hangers, arc telescopic link and second arc hangers formed through the arc telescopic link, adjust according to the size of different patient's ears, avoid reining in the ear, simultaneously great improvement the comfort level that different patients used, this oxygen tube is simple, and convenient to use has better comfort level, is difficult to drop during the use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of an oxygen inhalation tube provided in an embodiment of the present invention in a first use state;

fig. 2 is a schematic structural view of the oxygen inhalation tube provided in the embodiment of the present invention in a second use state;

fig. 3 is a schematic structural view of the first transverse plate according to the embodiment of the present invention;

fig. 4 is a schematic structural view of a second transverse plate according to an embodiment of the present invention;

fig. 5 is a schematic view of a part of a structure of a suspension loop device according to an embodiment of the present invention.

Icon: 100-oxygen uptake pipe; 200-a first oxygen inhalation tube; 300-a second oxygen tube; 400-a third oxygen tube; 500-telescopic oxygen uptake pipe; 510-a first telescopic oxygen tube; 520-a second telescopic oxygen tube; 600-nasal plug of oxygen inhalation tube; 610-sponge; 700-adjusting the fixture; 710-a first riser; 720-a second riser; 730-a first transverse plate; 731-threaded hole; 740-a second transverse plate; 741-a groove; 750-a spring; 760-bolt; 800-a hangers device; 810-telescoping connecting rods; 811-a first telescopic connecting rod; 812-a second telescoping connection rod; 813-first locating hole; 814-a second positioning hole; 820-a first arc shaped hanger; 830-arc telescopic rod; 840-second arc shaped hanging lug.

Detailed Description

Make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, will combine the attached drawing in the embodiment of the present invention below, to the technical scheme in the embodiment of the present invention clearly, completely describe, obviously, the embodiment described is a partial embodiment of the present invention, rather than whole embodiment. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1, the present embodiment provides an oxygen inhalation tube 100, which includes a first oxygen inhalation tube 200, a second oxygen inhalation tube 300, a third oxygen inhalation tube 400, a telescopic oxygen inhalation tube 500, an oxygen inhalation tube nasal plug 600, an adjusting and fixing device 700, and a hanger device 800.

One end of the first oxygen inhalation tube 200 is communicated with one end of the telescopic oxygen inhalation tube 500, the other end is communicated with the third oxygen inhalation tube 400, one end of the second oxygen inhalation tube 300 is communicated with the other end of the telescopic oxygen inhalation tube 500, and the other end is communicated with the third oxygen inhalation tube 400.

The telescopic oxygen inhalation tube 500 is symmetrically provided with two oxygen inhalation tube nasal plugs 600, and the adjusting and fixing device 700 is connected with the telescopic oxygen inhalation tube 500 and is used for adjusting the distance between the two oxygen inhalation tube nasal plugs 600. The distance between the two oxygen inhalation tube nasal plugs 600 is adjusted by adjusting the fixing device 700 and the telescopic oxygen inhalation tube 500, and the adjustment is carried out according to the requirements of different patients so as to adapt to the distance between the nostrils of different patients and improve the comfort level of the patients.

Further, flexible oxygen tube 500 includes the flexible oxygen tube 520 of first flexible oxygen tube 510 and second, the one end and the first oxygen tube 200 intercommunication of first flexible oxygen tube 510, the other end slides the intercommunication with the flexible oxygen tube 520's of second one end, the other end and the flexible oxygen tube 300 intercommunication of second, the flexible oxygen tube 510 of first flexible oxygen tube and the flexible oxygen tube 520 of second all are provided with oxygen tube nose plug 600, adjust the distance between two oxygen tube nose plugs 600 through the relative position who adjusts the flexible oxygen tube 520 of first flexible oxygen tube 510 and second.

Further, the end of the oxygen inhalation tube nasal plug 600 away from the telescopic oxygen inhalation tube 500 is arc-shaped in order to avoid pricking the nasal mucosa during oxygen inhalation.

Referring to fig. 1, 2, 3 and 4, further, the adjusting and fixing device 700 includes a first vertical plate 710, a second vertical plate 720, a first horizontal plate 730, a second horizontal plate 740, a spring 750 and a bolt 760, wherein one end of the first vertical plate 710 is connected to the first telescopic oxygen inhalation tube 510, the other end is connected to one end of the first horizontal plate 730, one end of the second vertical plate 720 is connected to the second telescopic oxygen inhalation tube 520, the other end is connected to one end of the second horizontal plate 740, one end of the spring 750 is connected to the other end of the first horizontal plate 730, the other end of the spring 750 is connected to the other end of the second horizontal plate 740, one end of the first horizontal plate 730 far from the first vertical plate 710 is provided with a threaded hole 731, one end of the bolt 760 is disposed in the threaded hole 731, the other end extends towards the second horizontal plate 740, when the distance between the two oxygen inhalation tube nasal plugs 600 is adjusted and fixed, most of the bolt 760 is first disposed in the threaded hole 731 (shown in fig. 1), adjust the distance between two oxygen uptake pipe nose plugs 600 through adjusting the relative position of first flexible oxygen tube 510 and the flexible oxygen tube 520 of second, after adjusting, adjusting bolt 760's relative position, part bolt 760 is back-out towards the direction of second diaphragm 740, make bolt 760 keep away from the one end of first diaphragm 730 and support second diaphragm 740 (shown in fig. 2), carry out the relatively fixed to the position between first diaphragm 730 and the second diaphragm 740 this moment, thereby fix the position between first riser 710 and the second riser 720, and then fix the relative position of first flexible oxygen tube 510 and the flexible oxygen tube 520 of second, then fix the relative position of two oxygen uptake pipe nose plugs 600, high durability and convenient use, the patient's comfort level is good.

Furthermore, a groove 741 matched with the bolt 760 is formed at one end of the second transverse plate 740 away from the second vertical plate 720, and when one end of the bolt 760 away from the first transverse plate 730 abuts against the second transverse plate 740, the bolt is placed in the groove 741, so that the bolt 760 is prevented from sliding accidentally, and the use stability of the bolt is further improved.

Every oxygen inhalation tube nose gag 600 all encloses and is equipped with sponge 610, and sponge 610 can not only carry out relatively fixed to oxygen inhalation tube nose gag 600, improves oxygen inhalation tube nose gag 600's stability during the oxygen uptake, improves the effect of oxygen uptake, and the use of sponge 610 can avoid oxygen inhalation tube nose gag 600 to the friction of patient's nose and to the stimulation of nasal mucosa simultaneously, further improves patient's oxygen uptake effect.

With reference to fig. 1 and 5, the first oxygen inhalation tube 200 and the second oxygen inhalation tube 300 are respectively connected with the hanger device 800, during oxygen inhalation, the hanger device 800 is hung on the ear of the patient, the stability of the oxygen inhalation tube 300 is improved, the oxygen inhalation tube 300 is prevented from dropping during oxygen inhalation, meanwhile, the hanger device 800 is independently used, the oxygen inhalation tube 300 does not need to be wound on the back of the patient, the reining injury on the nose, the ear and the cheek of the patient is avoided, and the comfort level of the patient in use is further improved.

The hanger device 800 includes a telescoping connection rod 810, a first arc-shaped hanger 820, an arc-shaped telescoping rod 830, and a second arc-shaped hanger 840.

One end of the telescopic connecting rod 810 is connected with the first oxygen inhalation tube 200 or the second oxygen inhalation tube 300, the other end is hinged with one end of the first arc-shaped hanging lug 820 and one end of the second arc-shaped hanging lug 840 respectively, one end of the arc-shaped telescopic rod 830 is connected with the other end of the first arc-shaped hanging lug 820, and the other end is connected with the other end of the first arc-shaped hanging lug 820. The length between the arc-shaped hanging lug and the oxygen inhalation tube is adjusted through the telescopic connecting rod 810, and the adjustment is carried out according to the requirements of different patients, so that the use comfort of the patients is improved; adjust the space size that first arc hangers 820, arc telescopic link 830 and second arc hangers 840 formed through arc telescopic link 830, adjust according to the size of different patient's ears, avoid tightening the ear, simultaneously great improvement the comfort level that different patients used.

Further, telescopic connecting rod 810 includes first telescopic connecting rod 811 and second telescopic connecting rod 812, and the one end and the first oxygen tube 200 or the second oxygen tube 300 of first telescopic connecting rod 811 are connected, and the other end slides and cup joints in with second telescopic connecting rod 812.

Further, a plurality of first locating holes 813 have been seted up at the interval to first flexible connecting rod 811, second flexible connecting rod 812 is spaced apart to be equipped with a plurality of and first locating hole 813 matched with second locating hole 814, adjust the relative position back of first flexible connecting rod 811 and second flexible connecting rod 812, pass corresponding second locating hole 814 and first locating hole 813 with the screw, fix the relative position of first flexible connecting rod 811 and second flexible connecting rod 812, improve the stability that hangers device 800 used.

Further, the one end that first arc hangers 820 is close to second arc hangers 840 and the one end that second arc hangers 840 is close to first arc hangers 820 all are provided with sponge 610, avoid first arc hangers 820 and second arc hangers 840 to strangle patient's ear, further improve the comfort level that patient used.

In summary, the oxygen inhalation tube provided by the utility model adjusts the distance between the nasal plugs of the two oxygen inhalation tubes by adjusting the fixing device and the telescopic oxygen inhalation tube, and adjusts according to the requirements of different patients so as to adapt to the distance between the nostrils of different patients and improve the comfort level of the patients; the sponge surrounds each oxygen inhalation tube nasal plug, the sponge can relatively fix the oxygen inhalation tube nasal plugs, the stability of the oxygen inhalation tube nasal plugs during oxygen inhalation is improved, the oxygen inhalation effect is improved, and meanwhile, the use of the sponge can avoid the friction of the oxygen inhalation tube nasal plugs on the nose of a patient and the stimulation to nasal mucosa, so that the oxygen inhalation effect of the patient is further improved; when oxygen is inhaled, the ear hanging device is hung on the ears of a patient, so that the use stability of the oxygen inhalation tube is improved, the oxygen inhalation tube is prevented from falling off during oxygen inhalation, meanwhile, the ear hanging device is independently used, the oxygen inhalation tube does not need to be wound on the patient, the reining injury to the nose, the ears and the cheeks of the patient is avoided, and the use comfort level of the patient is further improved; the hanger device comprises a telescopic connecting rod, a first arc-shaped hanger, an arc-shaped telescopic rod and a second arc-shaped hanger, the length between the arc-shaped hanger and the oxygen inhalation tube is adjusted through the telescopic connecting rod, and the length is adjusted according to the requirements of different patients, so that the use comfort of the patients is improved; adjust the space size that first arc hangers, arc telescopic link and second arc hangers formed through the arc telescopic link, adjust according to the size of different patient's ears, avoid reining in the ear, simultaneously great improvement the comfort level that different patients used, this oxygen tube is simple, and convenient to use has better comfort level, is difficult to drop during the use.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The oxygen uptake pipe is characterized by comprising a first oxygen uptake pipe, a second oxygen uptake pipe, a third oxygen uptake pipe, a telescopic oxygen uptake pipe, oxygen uptake pipe nasal plugs, an adjusting and fixing device and a hanging lug device, wherein one end of the first oxygen uptake pipe is communicated with one end of the telescopic oxygen uptake pipe, the other end of the first oxygen uptake pipe is communicated with the third oxygen uptake pipe, one end of the second oxygen uptake pipe is communicated with the other end of the telescopic oxygen uptake pipe, the other end of the second oxygen uptake pipe is communicated with the third oxygen uptake pipe, the telescopic oxygen uptake pipe is symmetrically provided with two oxygen uptake pipe nasal plugs, each oxygen uptake pipe nasal plug is surrounded by a sponge, the adjusting and fixing device is connected with the telescopic oxygen uptake pipe and is used for adjusting the distance between the two oxygen uptake pipe nasal plugs, the first oxygen uptake pipe and the second oxygen uptake pipe are respectively connected with the hanging lug device, and the hanging lug device comprises a telescopic connecting rod, a first arc-shaped hanging lug, The oxygen inhalation tube comprises an arc-shaped telescopic rod and a second arc-shaped hanging lug, one end of the telescopic connecting rod is connected with the first oxygen inhalation tube or the second oxygen inhalation tube, the other end of the telescopic connecting rod is hinged with one end of the first arc-shaped hanging lug and one end of the second arc-shaped hanging lug respectively, one end of the arc-shaped telescopic rod is connected with the other end of the first arc-shaped hanging lug, and the other end of the arc-shaped telescopic rod is connected with the other end of the first arc-shaped hanging lug.

2. The oxygen tube of claim 1, wherein the telescopic oxygen tube comprises a first telescopic oxygen tube and a second telescopic oxygen tube, one end of the first telescopic oxygen tube is communicated with the first oxygen tube, the other end of the first telescopic oxygen tube is communicated with one end of the second telescopic oxygen tube in a sliding manner, the other end of the second telescopic oxygen tube is communicated with the second oxygen tube, and the first telescopic oxygen tube and the second telescopic oxygen tube are both provided with the oxygen tube nasal plugs.

3. The oxygen tube of claim 2, wherein the end of the nose plug of the oxygen tube, which is far away from the telescopic oxygen tube, is arc-shaped.

4. The oxygen tube of claim 2, wherein the adjusting and fixing device comprises a first vertical plate, a second vertical plate, a first transverse plate, a second transverse plate, a spring and a bolt, one end of the first vertical plate is connected with the first telescopic oxygen tube, the other end of the first vertical plate is connected with one end of the first transverse plate, one end of the second vertical plate is connected with the second telescopic oxygen tube, the other end of the second vertical plate is connected with one end of the second transverse plate, one end of the spring is connected with the other end of the first transverse plate, the other end of the spring is connected with the other end of the second transverse plate, one end of the first transverse plate, which is far away from the first vertical plate, is provided with a threaded hole, one end of the bolt is arranged in the threaded hole, and the other end of the bolt extends towards the direction of the second transverse plate.

5. The oxygen tube of claim 4, wherein a groove matched with the bolt is formed at one end of the second transverse plate away from the second vertical plate.

6. The oxygen tube as claimed in claim 1, wherein the telescopic connecting rod comprises a first telescopic connecting rod and a second telescopic connecting rod, one end of the first telescopic connecting rod is connected with the first oxygen tube or the second oxygen tube, and the other end is slidably sleeved in the second telescopic connecting rod.

7. The oxygen tube as claimed in claim 6, wherein the first telescopic connecting rod is provided with a plurality of first positioning holes at intervals, and the second telescopic connecting rod is provided with a plurality of second positioning holes at intervals, wherein the second positioning holes are matched with the first positioning holes.

8. The oxygen tube of claim 6, wherein a sponge is arranged at one end of the first arc-shaped hanging lug close to the second arc-shaped hanging lug and at one end of the second arc-shaped hanging lug close to the first arc-shaped hanging lug.