Air-blown microcable

Abstract

The present invention relates to the technical field of microcables, and provides an air-blown microcable, comprising an optical cable body, an optical fiber, a grease, a loose tube, aramid and an outer sheath, wherein the optical fiber is arranged in the loose tube, the gap between the optical fiber and the loose tube is filled with the grease, the loose tube is arranged inside the outer sheath, and the gap between the loose tube and the outer sheath is filled with the aramid. The beneficial effects of the present invention are as follows: by arranging an auxiliary bending component and an adjustment component on the outer sheath, the flexible corrugated tube and the tube can be fixed to the part where the optical cable body is to be bent, and the optical cable body can be bent at any angle within the range of 0° to 180° under the drive of the adjustment component, and the optical cable body is supported after being bent to prevent the elastic force of the optical cable body from squeezing the flexible corrugated tube to deform it.

Description

Technical Field

[0001] The invention relates to the technical field of micro cables, in particular to an air-blown micro cable. Background Art

[0002] With the development of urbanization and mobile communication technology, the pipeline resources for laying optical cables are becoming increasingly scarce, and even crowded. Compared with traditional optical cables, air-blown micro cables have obvious advantages in laying in pipelines. Air-blown micro cables greatly improve the utilization rate of existing pipeline resources, reduce or avoid the excavation and construction of new communication pipelines, thereby reducing the overall cost of the project;

[0003] Due to terrain restrictions, air-blown microcables inevitably need to be bent during laying. Currently, corner transition sections are generally used to assist air-blown microcables in bending. However, it is necessary to select corner transition sections of different angles for use on the air-blown microcable according to the actual bending radius, and the bending angle of the corner transition section cannot be adjusted on-site according to needs. Moreover, the corner transition section itself is a flexible structure. When the air-blown microcable is bent, it will generate elastic force to resist the bending. It is difficult to support the optical cable after it is bent only by the corner transition section, which is not convenient for laying. Moreover, after long-term use, the corner transition section will gradually deform in the process of resisting the elastic force of the air-blown microcable until the corner transition section is damaged. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems and / or the problems existing in the existing air-blown microcables, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is that when the air-blown microcable is bent through the flexible corner transition section during laying, the bending angle of the corner transition section cannot be adjusted on site as needed, and the corner transition section itself is a flexible structure. When the air-blown microcable is bent, it will generate elastic force to resist the bending. It is difficult to support the optical cable after it is bent only by the corner transition section, which is inconvenient for laying. Moreover, after long-term use, the corner transition section will gradually deform in the process of resisting the elastic force of the air-blown microcable until the corner transition section is damaged.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: an air-blown microcable, comprising:

[0008] The optical cable body comprises an optical fiber, a grease, a loose tube, aramid and an outer sheath, wherein the optical fiber is arranged in the loose tube, the gap between the optical fiber and the loose tube is filled with the grease, the loose tube is arranged inside the outer sheath, and the gap between the loose tube and the outer sheath is filled with the aramid;

[0009] An auxiliary bending assembly, comprising a flexible bellows, a sleeve, a clamping member and a sealing member, wherein the two sleeves are fixedly arranged at both ends of the flexible bellows, respectively, the flexible bellows and the two sleeves are arranged on the surface of the outer sheath, the two sleeves are fixed to the surface of the outer sheath by the clamping member, and the sealing member is detachably mounted on one end of the sleeve and sleeved on the surface of the outer sheath; and

[0010] The adjusting component comprises a traction member, a rotating member and a driving member, wherein the rotating members are respectively arranged on the surface of the sleeve, the driving member is arranged between two rotating members, and the traction member is arranged inside the rotating member and connected to the clamping member.

[0011] As a preferred solution of the air-blown microcable described in the present invention, the rotating part includes a through hole, a connecting shaft and a connecting arm, the connecting shaft is fixedly arranged on the surface of the sleeve, the through hole is arranged on the surface of the connecting arm, and the connecting arm is rotatably arranged on the connecting shaft through the through hole.

[0012] As a preferred solution of the air-blown microcable described in the present invention, the clamping member includes a pressure plate, a spring, a cavity and a driving rod, the cavity is arranged inside the connecting shaft, the end of the driving rod is fixed to the surface of the pressure plate, the top end of the driving rod is movably arranged in the cavity, and the spring is fixed to the surface of the sleeve and sleeved on the surface of the driving rod.

[0013] As a preferred solution of the air-blown microcable described in the present invention, the traction member includes a traction seat, a slide groove and a receiving groove, the slide groove is arranged on the surface of the connecting shaft and is connected to the interior of the cavity, the traction seat is fixedly arranged at one end of the driving rod and is rotatably arranged in the cavity, and the receiving groove is arranged on the surface of the traction seat.

[0014] As a preferred solution of the air-blown microcable described in the present invention, the driving member includes a knob, a threaded rod and an adjusting rod, the knob is fixed to the surface of the threaded rod, one end of the threaded rod is rotatably set on the surface of one of the connecting arms, the adjusting rod is fixed on the surface of the other connecting arm, and one end of the threaded rod is threadedly connected to the inside of the adjusting rod.

[0015] As a preferred solution of the air-blown microcable described in the present invention, the sealing member includes a conical sleeve and a connecting portion, the connecting portion is fixedly arranged on the end face of the conical sleeve, the connecting portion is threadedly connected to the inner wall of the casing, and the end face of the conical sleeve is in contact with the end face of the casing.

[0016] As a preferred solution of the air-blown microcable of the present invention, the clamping member further comprises a first arc portion, the first arc portion is arranged on the surface of the pressure plate, and the first arc portion is attached to the surface of the outer sheath.

[0017] As a preferred solution of the air-blown microcable described in the present invention, the traction member also includes a lever, which is fixedly arranged on the inner wall of the through hole and slidably arranged in the slide groove, and one end of the lever extends into the accommodating groove and abuts against the inner wall of the accommodating groove.

[0018] As a preferred solution of the air-blown micro-cable of the present invention, the traction member further comprises a second arc surface portion, and the second arc surface portion is arranged on a side of the inner wall of the accommodating groove close to the shifting rod.

[0019] The beneficial effects of the present invention are as follows: by arranging an auxiliary bending component and an adjusting component on the outer sheath, the flexible bellows and the sleeve can be fixed at the position where the optical cable body is to be bent, and the optical cable body can be bent at any angle within the range of 0° to 180° under the drive of the adjusting component, and the optical cable body can be supported after being bent to prevent the elastic force of the optical cable body after being bent from squeezing the flexible bellows to cause it to deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 This is the structural diagram of the air-blown microcable.

[0022] Figure 2 This is a structural diagram of the conical sleeve and casing connection of the air-blown microcable.

[0023] Figure 3 This is the connection structure diagram of the outer sheath and pressure plate of the air-blown microcable.

[0024] Figure 4 This is the main shaft cross-sectional structure diagram of the air-blown microcable.

[0025] Figure 5This is a top view of the structure of the connecting arm of the air-blown microcable.

[0026] Figure 6 This is the initial structure diagram of the air-blown microcable.

[0027] Figure 7 This is the bending structure diagram of the air-blown microcable.

[0028] Figure 8 This is a schematic diagram of the optical cable body structure of the air-blown microcable in Example 1.

[0029] Fig. 9 This is a schematic diagram of the optical cable body structure of the air-blown microcable in Example 2.

[0030] In the figure: 100, optical cable body; 101, optical fiber; 102, grease; 103, loose tube; 104, aramid; 105, outer sheath; 106, optical fiber ribbon; 107, first water blocking tape; 108, casing; 109, second water blocking tape; 110, steel belt; 111, sheath material; 112, steel wire; 113, tear rope; 200, auxiliary bending component; 201, flexible corrugated tube; 202, casing; 203, clamping member; 203a, pressure plate; 203b, spring; 203c, cavity; 2 03d, driving rod; 203e, first arc surface; 204, sealing member; 204a, conical sleeve; 204b, connecting portion; 300, adjusting assembly; 301, traction member; 301a, traction seat; 301b, slide groove; 301c, accommodating groove; 301d, lever; 301e, second arc surface; 302, rotating member; 302a, through hole; 302b, connecting shaft; 302c, connecting arm; 303, driving member; 303a, knob; 303b, threaded rod; 303c, adjusting rod. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] Example 1

[0033] Reference Figure 1 , 2, 5, 6, 7 and 8 are the first embodiment of the present invention, which provides an air-blown microcable, the air-blown microcable comprising an optical cable body 100, an auxiliary bending assembly 200 and an adjustment assembly 300, the optical cable body 100 comprising an optical fiber 101, a grease 102, a loose tube 103, aramid fiber 104 and an outer sheath 105, the optical fiber 101 is arranged in the loose tube 103, the gap between the optical fiber 101 and the loose tube 103 is filled with the grease 102, the loose tube 103 is arranged inside the outer sheath 105, and the loose tube 103 and the outer sheath 105 are connected. The gaps between the outer sheaths 105 are filled with aramid 104. Through the cooperation of the auxiliary bending component 200 and the adjusting component 300, the auxiliary bending component 200 can be clamped at the part where the outer sheath 105 is to bend. Driven by the adjusting component 300, the outer sheath 105 can drive the optical cable body 100 to bend at any angle within the range of 0° to 180°, and support the optical cable body 100 after it is bent to prevent the elastic force of the optical cable body 100 after bending from squeezing the auxiliary bending component 200 to deform it.

[0034] Specifically, the auxiliary bending assembly 200 includes a flexible bellows 201, a sleeve 202, a clamping piece 203 and a sealing piece 204. The two sleeves 202 are respectively fixed at the two ends of the flexible bellows 201. The flexible bellows 201 and the two sleeves 202 are arranged on the surface of the outer sheath 105. The two sleeves 202 are fixed to the surface of the outer sheath 105 by the clamping piece 203. The sealing piece 204 is detachably installed on one end of the sleeve 202 and is sleeved on the surface of the outer sheath 105.

[0035] The flexible corrugated tube 201 is sleeved on the surface of the outer sheath 105 and plays a protective role as the outermost layer. It can also limit the bending part of the outer sheath 105 to the inside of the flexible corrugated tube 201. A clamping piece 203 is provided in the sleeve 202, and the sleeve 202 can be fixed to the surface of the outer sheath 105 by the clamping piece 203, thereby achieving the fixation of the flexible corrugated tube 201. The sealing piece 204 can seal the gap between the sleeve 202 and the outer sheath 105 to prevent soil or moisture from entering the sleeve 202 and corroding related structures, and can also play an insect-proof role. The sleeve 202 is fixed to two different positions on the outer sheath 105 by the clamping piece 203, and the optical cable body 100 can be bent by applying force at these two positions.

[0036] Specifically, the adjustment assembly 300 includes a traction member 301, a rotating member 302 and a driving member 303. The rotating members 302 are respectively arranged on the surface of the sleeve 202, the driving member 303 is arranged between the two rotating members 302, and the traction member 301 is arranged inside the rotating member 302 and connected to the clamping member 203.

[0037] Specifically, the rotating member 302 includes a through hole 302a, a connecting shaft 302b and a connecting arm 302c, wherein the connecting shaft 302b is fixedly arranged on the surface of the sleeve 202, the through hole 302a is arranged on the surface of the connecting arm 302c, and the connecting arm 302c is rotatably arranged on the connecting shaft 302b through the through hole 302a. The driving member 303 includes a knob 303a, a threaded rod 303b and an adjusting rod 303c, wherein the knob 303a is fixed on the surface of the threaded rod 303b, one end of the threaded rod 303b is rotatably arranged on the surface of one of the connecting arms 302c, the adjusting rod 303c is fixedly arranged on the surface of the other connecting arm 302c, and one end of the threaded rod 303b is threadedly connected to the inside of the adjusting rod 303c.

[0038] When the knob 303a is turned, the threaded rod 303b can be driven to rotate synchronously. Since the adjusting rod 303c is fixed and the threaded rod 303b is continuously rotating, one end of the threaded rod 303b can move linearly inside the adjusting rod 303c, thereby changing the overall length of the threaded rod 303b and the adjusting rod 303c. When the overall length of the threaded rod 303b and the adjusting rod 303c is changed, the distance between the two connecting arms 302c is also changed. After rotating the knob 303a, the knob 303a can drive the threaded rod 303b to rotate synchronously. When the threaded rod 303b rotates, the adjusting rod 303c can be driven to move linearly on its surface. When the overall length of the threaded rod 303b and the adjusting rod 303c is reduced, since the rotating member 302 can rotate on the surface of the sleeve 202, and the horizontal position of the rotating member 302 based on the sleeve 202 will not change, when the overall length of the threaded rod 303b and the adjusting rod 303c is shortened, one end of the threaded rod 303b and the adjusting rod 303c will respectively pull the sleeve 202 closer to each other through the connecting arm 302c. At this time, the two sleeves 202 approaching each other can cause the optical cable body 100 to bend, and then the angle between the two sleeves 202 can be adjusted by controlling the overall length of the threaded rod 303b and the adjusting rod 303c.

[0039] The connecting arm 302c can rotate on the rotating shaft through the through hole 302a. The distance between the two connecting arms 302c can be adjusted by setting the traction member 301 to achieve the bending of the optical cable body 100. As the optical cable body 100 bends, the connecting arm 302c can change its angle on the connecting shaft 302b through the through hole 302a. Figure 6 As shown, the two connecting arms 302c are in the same straight line with the optical cable body 100. When the optical cable body 100 is bent 90°, as shown in FIG. Figure 7 As shown, the two connecting arms 302 c are respectively rotated 45° on the connecting axis 302 b to adapt to the bending of the optical cable body 100 .

[0040] Specifically, the clamping member 203 includes a pressure plate 203a, a spring 203b, a cavity 203c and a driving rod 203d. The cavity 203c is arranged inside the connecting shaft 302b, the end of the driving rod 203d is fixed to the surface of the pressure plate 203a, the top end of the driving rod 203d is movably arranged in the cavity 203c, and the spring 203b is fixedly arranged on the surface of the sleeve 202 and sleeved on the surface of the driving rod 203d.

[0041] When the sleeve 202 is sleeved on the surface of the outer sleeve 105, the spring 203b can drive the pressure plate 203a to move towards the direction close to the outer sleeve 105 through its own elastic force, so that the pressure plate 203a is in contact with the surface of the outer sleeve 105. At this time, the pressure plate 203a can drive the driving rod 203d to move synchronously inside the cavity 203c. In the initial state, the pressure plate 203a can be limited by the traction member 301. When the connecting arm 302c rotates on the surface of the connecting shaft 302b, it can drive the traction member 301 to move, and then the traction member 301 releases the driving rod 203d to achieve normal movement of the pressure plate 203a.

[0042] Specifically, the traction member 301 includes a traction seat 301a, a slide groove 301b and a receiving groove 301c. The slide groove 301b is arranged on the surface of the connecting shaft 302b and is connected to the interior of the cavity 203c. The traction seat 301a is fixedly arranged at one end of the driving rod 203d and is rotatably arranged in the cavity 203c. The receiving groove 301c is arranged on the surface of the traction seat 301a. The traction member 301 also includes a lever 301d, which is fixedly arranged on the inner wall of the through hole 302a and is slidably arranged in the slide groove 301b. One end of the lever 301d extends into the receiving groove 301c and contacts the inner wall of the receiving groove 301c.

[0043] When the connecting arm 302c rotates, it can drive the lever 301d to rotate synchronously. At this time, the lever 301d can revolve inside the slide groove 301b. In the initial state, the lever 301d is located between the traction seat 301a and the slide groove 301b, and the spring 203b is in the shortest state. The traction seat 301a is blocked by the lever 301d and cannot move under the elastic force of the spring 203b. When the lever 301d rotates, one end of the lever 301d can rotate synchronously from the bottom of the traction seat 301a. Under the action of the elastic force of the spring 203b, the lever 301d can immediately drive the traction seat 301a to move in the direction close to the outer sleeve 105 after entering the accommodating groove 301c, so that the traction seat 301a can drive the pressure plate 203a to move synchronously through the driving rod 203d, so as to achieve the clamping of the pressure plate 203a to the outer sleeve 105.

[0044] Specifically, the seal 204 includes a tapered sleeve 204a and a connecting portion 204b. The connecting portion 204b is fixedly disposed on the end surface of the tapered sleeve 204a. The connecting portion 204b is threadedly connected to the inner wall of the sleeve 202. The end surface of the tapered sleeve 204a contacts the end surface of the sleeve 202.

[0045] The connecting portion 204b can be driven to rotate synchronously by rotating the conical sliding sleeve 204a, and the connecting portion 204b can be connected to and separated from the sleeve 202 when rotating.

[0046] Example 2

[0047] Reference Figure 3 and 4 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0048] The clamping member 203 also includes a first arc surface portion 203e, which is arranged on the surface of the pressure plate 203a and is in contact with the surface of the outer sheath 105. The traction member 301 also includes a second arc surface portion 301e, which is arranged on the inner wall of the accommodating groove 301c close to the side of the lever 301d.

[0049] Specifically, a first arc surface portion 203e is provided at the bottom of the pressure plate 203a, which can increase the contact area between the pressure plate 203a and the outer sheath 105, thereby increasing the static friction between the two, so as to achieve stable clamping of the outer sheath 105 by the pressure plate 203a, and the setting of the second arc surface portion 301e can enable the connecting arm 302c to drive the lever 301d to smoothly disengage from the accommodating groove 301c when rotating in the reverse direction, so as to achieve the lifting of the traction seat 301a by the lever 301d, so that the optical cable body 100 can be driven back to the initial state through the connecting arm 302c, the threaded rod 303b and the adjusting rod 303c.

[0050] When in use, the staff passes the portion of the optical cable body 100 to be bent through the flexible corrugated tube 201 and the two sleeves 202. When burying the optical cable body 100, the staff turns the knob 303a, and drives the threaded rod 303b to rotate through the knob 303a. One end of the threaded rod 303b can move linearly inside the adjusting rod 303c when rotating, thereby shortening the overall length between the threaded rod 303b and the adjusting rod 303c. At this time, one end of the two connecting arms 302c is respectively subjected to the pulling force from the adjusting rod 303c and the threaded rod 303b, so that the distance between the two connecting arms 302c is shortened, and the connecting arms 302c can rotate on the surface of the connecting shaft 302b. When the connecting arms 302c are rotating, the connecting arms 302c can pull the two sleeves 202 closer to each other through the connecting shaft 302b, so that the optical cable body 100 is bent to the required angle through the pulling of the two sleeves 202.

[0051] When the connecting arm 302c rotates, it can drive the lever 301d to rotate synchronously inside the slide groove 301b. At this time, one end of the lever 301d can move from the bottom of the traction seat 301a to the accommodating groove 301c. Since the spring 203b is in a compressed state at this time, the spring 203b can drive the pressure plate 203a to move through its own elastic force, so that the pressure plate 203a is tightly attached to the surface of the outer sheath 105 to clamp the outer sheath 105, so that the sleeve 202, the connecting arm 302c, the threaded rod 303b and the adjusting rod 303c are stably fixed on the surface of the outer sheath 105, and at this time, the bent optical cable body 100 cooperates with the connecting arm 302c, the threaded rod 303b and the adjusting rod 303c to form a stable triangular structure to support the bent optical cable body 100.

[0052] Example 3

[0053] Reference Fig. 9 , which is the third embodiment of the present invention, and is based on the first two embodiments.

[0054] The optical cable body 100 in this embodiment includes an optical fiber ribbon 106, a first water-blocking tape 107, a sleeve 108, a second water-blocking tape 109, a steel tape 110, a sheathing material 111, a steel wire 112 and a tear rope 113, wherein the optical fiber ribbon 106 is arranged inside the first water-blocking tape 107, the first water-blocking tape 107 is arranged inside the sleeve 108, the sleeve 108 is arranged inside the second water-blocking tape 109, the second water-blocking tape 109 is arranged inside the steel tape 110, and the steel tape 110 is arranged inside the sheathing material 111, wherein the steel wire 112 is arranged inside the sheathing material 111, and the tear rope 113 is arranged inside the sheathing material 111 and the second water-blocking tape 109.

[0055] Specifically, the optical cable body 100 in this embodiment adopts a fully dry ribbon design with a high optical fiber density and no grease filling, which solves the process of cleaning the grease during construction, saves construction time, and prevents the grease from polluting the construction environment. When bending, the optical cable body 100 is directly passed through the flexible corrugated tube 201, so that the sleeve 202 is sleeved on the surface of the sheath material 111, and there is no need to clean the grease after bending.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the present invention.

Claims

1. An air-blown microcable, characterized in that: include, An optical cable body (100) comprises an optical fiber (101), a grease (102), a loose tube (103), aramid (104) and an outer sheath (105), wherein the optical fiber (101) is arranged in the loose tube (103), the gap between the optical fiber (101) and the loose tube (103) is filled with the grease (102), the loose tube (103) is arranged inside the outer sheath (105), and the gap between the loose tube (103) and the outer sheath (105) is filled with the aramid (104); An auxiliary bending assembly (200), comprising a flexible bellows (201), a sleeve (202), a clamping piece (203) and a sealing piece (204), wherein the two sleeves (202) are respectively fixedly arranged at two ends of the flexible bellows (201), the flexible bellows (201) and the two sleeves (202) are arranged on the surface of the outer sheath (105), the two sleeves (202) are both fixed to the surface of the outer sheath (105) by means of the clamping piece (203), and the sealing piece (204) is detachably mounted on one end of the sleeve (202) and sleeved on the surface of the outer sheath (105); and An adjustment assembly (300) comprising a traction member (301), a rotating member (302) and a driving member (303), wherein the rotating members (302) are respectively arranged on the surface of the sleeve (202), the driving member (303) is arranged between the two rotating members (302), and the traction member (301) is arranged inside the rotating member (302) and connected to the clamping member (203); The clamping member (203) comprises a pressing plate (203a), a spring (203b), a cavity (203c) and a driving rod (203d); the cavity (203c) is arranged inside the connecting shaft (302b); the end of the driving rod (203d) is fixed to the surface of the pressing plate (203a); the top end of the driving rod (203d) is movably arranged in the cavity (203c); the spring (203b) is fixedly arranged on the surface of the sleeve (202) and sleeved on the surface of the driving rod (203d); The traction member (301) comprises a traction seat (301a), a slide groove (301b) and a receiving groove (301c); the slide groove (301b) is arranged on the surface of the connecting shaft (302b) and is connected to the inside of the cavity (203c); the traction seat (301a) is fixedly arranged on one end of the driving rod (203d) and is rotatably arranged in the cavity (203c); and the receiving groove (301c) is arranged on the surface of the traction seat (301a).

2. An air-blown microcable according to claim 1, characterized in that: The rotating member (302) comprises a through hole (302a), a connecting shaft (302b) and a connecting arm (302c); the connecting shaft (302b) is fixedly arranged on the surface of the sleeve (202); the through hole (302a) is arranged on the surface of the connecting arm (302c); and the connecting arm (302c) is rotatably arranged on the connecting shaft (302b) through the through hole (302a).

3. An air-blown microcable according to claim 2, characterized in that: The driving member (303) comprises a knob (303a), a threaded rod (303b) and an adjusting rod (303c), wherein the knob (303a) is fixed to the surface of the threaded rod (303b), one end of the threaded rod (303b) is rotatably arranged on the surface of one of the connecting arms (302c), the adjusting rod (303c) is fixedly arranged on the surface of the other connecting arm (302c), and one end of the threaded rod (303b) is threadedly connected to the inside of the adjusting rod (303c).

4. The air-blown microcable according to claim 1, characterized in that: The sealing member (204) comprises a conical sliding sleeve (204a) and a connecting portion (204b), wherein the connecting portion (204b) is fixedly arranged on the end surface of the conical sliding sleeve (204a), the connecting portion (204b) is threadedly connected to the inner wall of the sleeve (202), and the end surface of the conical sliding sleeve (204a) contacts the end surface of the sleeve (202).

5. The air-blown microcable according to claim 1, characterized in that: The clamping member (203) further comprises a first arcuate portion (203e), wherein the first arcuate portion (203e) is arranged on the surface of the pressing plate (203a), and the first arcuate portion (203e) is attached to the surface of the outer sheath (105).

6. The air-blown microcable according to claim 2, characterized in that: The traction member (301) further comprises a lever (301d), the lever (301d) being fixedly arranged on the inner wall of the through hole (302a), and the lever (301d) being slidably arranged in the slide groove (301b), and one end of the lever (301d) extending into the accommodating groove (301c) and abutting against the inner wall of the accommodating groove (301c).

7. An air-blown microcable according to claim 6, characterized in that: The traction member (301) further comprises a second arc surface portion (301e), wherein the second arc surface portion (301e) is arranged on a side of the inner wall of the accommodating groove (301c) close to the shifting rod (301d).

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