CN214479161U - Cable fastening device and junction box - Google Patents

Abstract

The application discloses cable fastener and terminal box. The cable fastening device comprises a fixed part, a moving part and at least one set of folding part; the fixed part and the moving part are arranged oppositely, and the moving part can perform translational motion to be close to or far away from the fixed part; each set of folding pieces comprises a first folding piece and a second folding piece which are oppositely arranged along a first direction; the first folding piece is connected with a first pressing piece, the second folding piece is connected with a second pressing piece, and the first pressing piece and the second pressing piece are arranged oppositely along a first direction; the first pressing piece and the second pressing piece are used for fastening a cable; the first end of the first folding piece and the first end of the second folding piece are respectively connected with the fixing piece; the second end of the first folding piece and the second end of the second folding piece are respectively connected with the moving piece; under the condition that the moving part is far away from the fixed part, the first pressing part and the second pressing part are close to each other along the first direction; under the condition that the moving part is close to the fixed part, the first pressing part and the second pressing part are far away from each other along the first direction.

Description

Cable fastening device and junction box

Technical Field

The present application relates to the field of communications equipment technologies, and in particular, to a cable fastening device and a junction box.

Background

In the laying process of the cable, construction operation for connecting two sections of cables is often faced, and in the construction operation, the cable needs to be reliably fixed so as to prevent the cable from loosening and bringing about potential safety hazards. In view of the above, it is desirable to provide a device capable of effectively fixing a cable.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to provide a new solution for a cable fastening device.

According to a first aspect of the present application, there is provided a cable fastening device comprising:

a fixed member and a movable member; the fixed part and the moving part are arranged oppositely, and the moving part can perform translational motion to be close to or far away from the fixed part;

at least one set of folding pieces, wherein each set of folding pieces comprises a first folding piece and a second folding piece which are oppositely arranged along a first direction;

the first folding piece is connected with a first pressing piece; the second folding part is connected with a second pressing part; the first pressing piece and the second pressing piece are arranged oppositely along a first direction; the first pressing piece and the second pressing piece are used for fastening a cable;

the first end of the first folding piece and the first end of the second folding piece are respectively connected with the fixing piece; the second end of the first folding piece and the second end of the second folding piece are respectively connected with the moving piece;

under the condition that the moving part is far away from the fixed part, the first pressing part and the second pressing part are close to each other along a first direction;

under the condition that the moving part is close to the fixed part, the first pressing part and the second pressing part are far away from each other along a first direction.

Optionally, the folding members are provided with three sets of folding members, which are evenly arranged in a circumferential direction.

Optionally, the first pressing piece comprises a first pressing rod, a first line pressing plate and a first elastic piece; the first end of the first pressure lever is connected with the first folding piece, and the first elastic piece is connected between the second end of the first pressure lever and the first end of the first wire pressing plate;

the second pressing piece comprises a second pressing rod, a second line pressing plate and a second elastic piece; the first end of the second pressure lever is connected with the second folding part, and the second elastic part is connected between the second end of the second pressure lever and the first end of the second line pressing plate;

the second end of the first wire pressing plate and the second end of the second wire pressing plate are arranged oppositely along a first direction; the second end of the first wire pressing plate and the second end of the second wire pressing plate are used for being abutted to a cable to fasten the cable.

Optionally, the second end of the first wire pressing plate is provided with a convex structure and/or a concave structure; and the second end of the second wire pressing plate is provided with a convex structure and/or a concave structure.

Optionally, the fixing member includes a first fixing member and a second fixing member, and the first fixing member is detachably connected to the second fixing member.

Optionally, the fixture further comprises a seal disposed between the first fixture and the second fixture.

Optionally, the moving member comprises a sleeve and a collar; the lantern ring is sleeved outside the sleeve and can move along the axial direction of the sleeve; the second end of the first folding piece and the second end of the second folding piece are respectively connected with the lantern ring.

Optionally, the moving member further includes a positioning sleeve, the positioning sleeve has a first positioning portion and a second positioning portion, the sleeve is rotatably sleeved outside the positioning sleeve, the first positioning portion abuts against a first end of the sleeve along the axial direction, and the second positioning portion abuts against a second end of the sleeve along the axial direction.

Optionally, the cable fastening device further comprises a guide piece, the guide piece is provided with a through hole, and a cable to be fastened is arranged in the through hole in a penetrating manner; along the first direction, the guide piece is at least oppositely provided with a pair of guide holes, and the guide holes are communicated with the through holes; the first pressing member passes through one of the pair of guide holes, and the second pressing member passes through the other of the pair of guide holes.

According to a second aspect of the present application, there is provided a junction box comprising a box body and a cable fastening device as described in the first aspect; the fixing piece is connected with the box body.

The technical scheme adopted by the application can achieve the following beneficial effects:

the cable fastening device provided by the embodiment of the application has the advantages that the structure is simple, the operation is convenient, the cable can be effectively fixed, and the cable is prevented from loosening.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

FIG. 1 is a first schematic structural view of a cable securing device according to one embodiment of the present application;

FIG. 2 is a second schematic structural view of a cable securing device according to one embodiment of the present application;

FIG. 3 is a partial schematic structural view of a cable securing device according to one embodiment of the present application;

FIG. 4 is a partial schematic structural view of a cable securing device according to one embodiment of the present application;

FIG. 5 is a schematic diagram of a junction box according to one embodiment of the present application.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

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, further discussion thereof is not required in subsequent figures.

Referring to fig. 1, according to one embodiment of the present application, a cable securing device is provided. The cable fastening device comprises a fixed part 11 and a movable part 12, wherein at least one set of folding parts is arranged; the fixed part 11 is arranged opposite to the moving part 12, and the moving part 12 can move in a translation manner to approach or depart from the fixed part 11; each set of folding pieces comprises a first folding piece 13 and a second folding piece 14 which are oppositely arranged along a first direction; the first folding member 13 has a first folding portion to which a first pressing member 15 is connected; the second folding member 14 has a second folding portion, and a second pressing member 16 is connected to the second folding portion; the first pressing piece 15 and the second pressing piece 16 are arranged oppositely along a first direction; the first press element 15 and the second press element 16 are used for fastening a cable; a first end of the first folding member 13 and a first end of the second folding member 14 are respectively connected with the fixing member 11; the second end of the first folding part 13 and the second end of the second folding part 14 are respectively connected with the moving part 12; under the condition that the moving part 12 is far away from the fixed part 11, the first folding part and the second folding part are unfolded, and the first pressing part 15 and the second pressing part 16 are driven to mutually approach along a first direction; under the condition that the moving part 12 is close to the fixed part 11, the first folding part and the second folding part are folded, and the first pressing part 15 and the second pressing part 16 are driven to be away from each other along a first direction.

In the cable fastening device provided in the embodiment of the present application, the cable 3 to be fastened is placed between the first pressing member 15 and the second pressing member 16, and the first direction is a radial direction of the cable 3. When the cable 3 needs to be fastened, the moving part 12 is far away from the fixing part 11 to perform translational motion, and then the first pressing part 15 and the second pressing part 16 approach each other along the radial direction of the cable 3 until the first pressing part 15 and the second pressing part 16 are abutted and pressed on the cable 3 to fix the cable 3; when it is necessary to release the cable 3, the moving member 12 is moved in a translational motion close to the fixed member 11, and the first closing member 15 and the second closing member 16 are moved away from each other in a radial direction of the cable 3 to release the cable 3. The cable fastening device provided by the embodiment of the application has the advantages that the structure is simple, the operation is convenient, the cable 3 can be effectively fixed, and the cable 3 is prevented from loosening.

More specifically, a first end of the first folding member 13 and a first end of the second folding member 14 are respectively hinged to the fixed member 11, and a second end of the first folding member 13 and a second end of the second folding member 14 are respectively hinged to the moving member 12. Optionally, the first folding member 13 is provided with a first connecting piece 131 at the first folding portion, further specifically, the first folding member 13 is divided into two sub-folding members at the first folding portion, and both sub-folding members are hinged with the first connecting piece 131, and the first pressing member 15 is specifically connected with the first connecting piece 131. Likewise, the second folded part 14 is provided with a second connecting piece 141 at the second folded portion, and further specifically, the second folded part 14 is divided into two sub-folded pieces at the second folded portion, and both the two sub-folded pieces are hinged with the second connecting piece 141, and the second pressing piece 16 is specifically connected with the second connecting piece 141. In particular, the first and second folding members 13 and 14 may be folding tie rods.

Referring to fig. 1 and 2, in one embodiment, further, three sets of folding pieces are provided; further, three sets of said folding members are arranged uniformly in a circumferential direction.

In this particular example, a total of three sets of folding members are provided, in particular three first folding members 13 and three second folding members 14 are provided, the first folding members 13 and the second folding members 14 of each set being arranged opposite each other, in particular radially opposite each other along the cable 3. It is understood that said first direction refers to the radial direction of the cable 3, i.e. the direction along the radial direction of the cable 3 all belongs to said first direction. Further, each first folding member 13 is connected to a first pressing member 15, and each second folding member 14 is connected to a second pressing member 16, that is, each set of folding members is correspondingly provided with a first pressing member 15 and a second pressing member 16. Specifically, the three first press pieces 15 and the three second press pieces 16 are uniformly distributed along the same circumferential direction. When making moving member 12 be the translation motion far away from mounting 11, first pressfitting piece 15 and the second pressfitting piece 16 that three sets of folding pieces connected respectively are close to each other until the butt is fixed cable 3 on cable 3 along cable 3's radial simultaneously, like this, along cable 3's circumferencial direction, can let cable 3 atress even when three first pressfitting piece 15 and three second pressfitting piece 16 compress tightly cable 3, avoid haring the inner structure of cable 3.

Referring to fig. 2, in one embodiment, further, the first pressing element 15 includes a first pressing rod 151, a first pressing plate 152 and a first elastic element 153; a first end of the first pressing rod 151 is connected with the first folding part, and a first elastic part 153 is connected between a second end of the first pressing rod 151 and a first end of the first wire pressing plate 152; the second pressing member 16 comprises a second pressing rod 161, a second pressing plate 162 and a second elastic member 163; a first end of the second pressing rod 161 is connected with the second folding part, and the second elastic member 163 is connected between a second end of the second pressing rod 161 and a first end of the second line pressing plate 162; the second end of the first wire pressing plate 152 is opposite to the second end of the second wire pressing plate 162 along a first direction; the second end of the first tension plate 152 and the second end of the second tension plate 162 are used for abutting against a cable to fasten the cable.

In this specific example, when the first closing member 15 and the second closing member 16 press the cable 3, specifically, the second end of the first tension plate 152 and the second end of the second tension plate 162 contact the cable 3 to press the cable 3. Specifically, the first elastic member 153 and the second elastic member 163 may be springs. After the first wire pressing plate 152 presses the cable 3, a part of the elastic force of the first elastic member 153 and the force applied by the moving member 12 to the first folding member 13 are superposed to offset the stress generated by the cable 3 due to thermal expansion and contraction along the radial direction of the cable 3; after the first wire pressing plate 152 is released, the elastic force of the first elastic member 153 can be balanced with the force applied by the moving member 12 to the first folding member 13. Similarly, when the second wire pressing plate 162 presses the cable 3, a portion of the elastic force of the second elastic member 163 and the force applied by the moving member 12 to the second folding member 14 are superimposed to counteract the stress generated by the cable 3 due to thermal expansion and contraction along the radial direction of the cable 3; after the second wire pressing plate 162 is released, the elastic force of the second elastic member 163 can be balanced with the force applied to the second folding member 14 by the moving member 12. In summary, the above-mentioned structure of the first pressing member 15 and the second pressing member 16 can make the force applied to the cable 3 by the first pressing member 15 and the second pressing member 16 more stable, so that the cable 3 can be more firmly fixed.

In one embodiment, further, the second end of the first wire pressing plate 152 is provided with a convex structure and/or a concave structure; the second end of the second line pressing plate 162 is provided with a convex structure and/or a concave structure.

Specifically, the convex structures and/or the concave structures are provided at the end surfaces of the second end of the first tension plate 152 and the second end of the second tension plate 162, which are surfaces that contact the cable 3. Therefore, the arrangement of the convex structures and/or the concave structures can increase the contact friction force between the first wire pressing plate 152 and the second wire pressing plate 162 and the cable 3, thereby effectively preventing the cable 3 from loosening. Further specifically, the first wire pressing plate 152 and the second wire pressing plate 162 are made of rubber, and the first wire pressing plate 152 and the second wire pressing plate 162 made of rubber can prevent damage to the surface of the cable 3 while being tightly attached to the cable 3.

Referring to fig. 1, in one embodiment, the fixing member 11 further includes a first fixing member 111 and a second fixing member 112, and the first fixing member 111 is detachably connected to the second fixing member 112.

When the cable fastening device is used specifically, the fixing element 11 is mounted on the box body of the junction box, so that the first fixing element 111 and the second fixing element 112 can be detachably connected in a manner of facilitating mounting and dismounting of the fixing element 11 on the box body.

In one embodiment, the fixing member 11 further includes a sealing member disposed between the first fixing member 111 and the second fixing member 112.

In a specific application, when the first fixing piece 111 and the second fixing piece 112 are installed on the box body of the junction box, the first fixing piece 111 and the second fixing piece 112 are connected in a sealing manner by adopting a sealing piece, so that the water can be effectively prevented from entering the box body of the junction box. Optionally, the seal is a sealing gasket.

Referring to fig. 1 and 3, in one embodiment, the moving member 12 further includes a sleeve 121 and a collar 122; the collar 122 is sleeved outside the sleeve 121, and the collar 122 can move along the axial direction of the sleeve 121; the second ends of the first folding member 13 and the second folding member 14 are respectively connected to the collar 122.

In this specific example, the sleeve 121 and the fixing member 11 are disposed opposite to each other in the axial direction of the sleeve 121. In particular use, the cable 3 is arranged through the sleeve 121. When it is desired to tighten the cable 3, the collar 122 is moved in the axial direction of the sleeve 121 in a direction away from the fixing member 11; conversely, when it is necessary to release the cable 3, the collar 122 is moved in the axial direction of the sleeve 121 toward the fixed member 11. Specifically, optionally, the sleeve 121 and the collar 122 are in threaded connection, that is, the outer side wall of the sleeve 121 is provided with an external thread, and the inner side wall of the collar 122 is provided with an internal thread, so that the sleeve 121 and the collar 122 can be converted into a translational motion of the collar 122 along the axial direction of the sleeve 121 through the rotational motion of the threaded connection, and thus the movement of the collar 122 is more stable. Specifically, the second ends of the first and second folds 13 and 14 are hinged to the collar 122, respectively.

Referring to fig. 3 and 4, in an embodiment, the moving element 12 further includes a positioning sleeve having a first positioning portion 1812 and a second positioning portion 1822, the sleeve 121 is rotatably sleeved outside the positioning sleeve, the first positioning portion 1812 abuts against a first end of the sleeve 121 in the axial direction, and the second positioning portion 1822 abuts against a second end of the sleeve 121 in the axial direction.

In this particular example, the particular function of the locating sleeve is to limit the movement of the sleeve 121 in its axial direction. In particular, when the sleeve 121 is rotated, since the two ends of the sleeve 121 in the axial direction are respectively abutted against the first positioning portion 1812 and the second positioning portion 1822, that is, the sleeve 121 is clamped between the first positioning portion 1812 and the second positioning portion 1822 in the axial direction, the sleeve 121 can only rotate in the circumferential direction and cannot move in the axial direction, so that when the sleeve 121 is rotated, the collar 122 can move in a translational manner in the axial direction of the sleeve 121, and the first positioning portion 1812 and the second positioning portion 1822 can prevent the collar 122 from slipping off the end of the sleeve 121. In a specific example, the positioning sleeve includes a first positioning sleeve 181 and a second positioning sleeve 182, the first positioning sleeve 181 has a first engaging portion 1811 and the first positioning portion 1812, wherein the first engaging portion 1811 is engaged with the sleeve 121 through a first end of the sleeve 121 in the axial direction, and the first positioning portion 1812 abuts against the first end of the sleeve 121 in the axial direction; the second positioning sleeve 182 has a second sleeved portion 1821 and the second positioning portion 1822, wherein the second sleeved portion 1821 is sleeved inside the sleeve 121 through the second end of the sleeve 121 in the axial direction, and the second positioning portion 1822 abuts against the second end of the sleeve 121 in the axial direction. The first positioning sleeve 181 is screwed to the second positioning sleeve 182. Specifically, optionally, the length of the second sleeved portion 1821 of the second positioning sleeve 182 in the axial direction may be set to be consistent with the length of the sleeve 121 in the axial direction, and during specific installation, the second positioning sleeve 182 is sleeved into the sleeve 121 via the second end of the sleeve 121 in the axial direction, and then the first positioning sleeve 181 is sleeved into the second positioning sleeve 182 via the first end of the sleeve 121 in the axial direction and is screwed to the second positioning sleeve 182, so that the installation manner is simple and easy to operate.

In one embodiment, further, the cable fastening device further includes a guide member 17, the guide member 17 is provided with a through hole, and the cable 3 to be fastened is inserted into the through hole; along the first direction, the guide 17 is at least oppositely provided with a pair of guide holes 170, and the guide holes 170 are communicated with the through holes; the first presser 15 passes through one of the pair of guide holes 170, and the second presser 16 passes through the other of the pair of guide holes 170.

When the first closing member 15 and the second closing member 16 move relatively along the first direction (i.e. the radial direction of the cable 3), the pair of guiding holes 170 formed in the guiding member 17 can respectively guide the first closing member 15 and the second closing member 16, so that the movement of the first closing member 15 and the second closing member 16 is more smooth, and the deviation during the movement is prevented. It will be appreciated that the number of guiding holes 170 corresponds to the number of first closing elements 15 and second closing elements 16, for example, in the embodiment where three sets of folding elements are provided, three pairs of guiding holes 170 need to be formed in the guiding element 17, since each set of folding elements has one first closing element 15 and one second closing element 16 connected thereto. In a specific example, the guide 17 may be specifically connected to the second positioning sleeve 182, and more specifically, the guide 17 is sleeved outside the second positioning portion 1822; the connection between the two can be, for example, a threaded connection. Specifically, the guiding element 17 is also a ring structure, in a specific application, the cable 3 passes through the second positioning sleeve 182 and the first positioning sleeve 181 inside the sleeve 121, and also passes through the through hole of the guiding element 17, and the first pressing element 15 and the second pressing element 16 pass through the pair of guiding holes 170 and abut on the cable 3.

The cable fastening device provided by the embodiment of the application is suitable for fastening the Yunba axle counting junction box cable 3, and is simple in structure and convenient to operate; all components can be assembled on site after being prefabricated, and the method is suitable for batch production; and the fastening device is light, has good stability and is convenient to mount and dismount.

Referring to fig. 5, according to another embodiment of the present application, there is provided a junction box including a box body 2 and the cable fastening device 1 as described above; the fixing member 11 is connected to the case 2.

Further specifically, the box body 2 is provided with a mounting hole, and the fixing member 11 is specifically mounted at the mounting hole. In the example that the fixing member 11 includes the first fixing member 111 and the second fixing member 112, specifically, the first fixing member 111 is installed on the inner side of the box body 2 through the installation hole, the second fixing member 112 is located on the outer side of the box body 2, and the first fixing member 111 and the second fixing member 112 are connected by a screw thread, so that the installation and the removal of the first fixing member 111 and the second fixing member 112 are convenient. And, a sealing member is provided between the first fixing member 111 and the second fixing member 112 to perform a sealing connection to prevent the water from entering the cartridge 2. More specifically, the first fixing element 111 and the second fixing element 112 are both ring-shaped, and in a specific application, the cable 3 sequentially passes through the second positioning sleeve 182 and the first positioning sleeve 181 which are located in the sleeve 121, and further passes through the through hole of the guiding element 17, and then sequentially passes through the second fixing element 112 and the first fixing element 111, and finally enters into the box body 2.

In specific application, the axle counting magnetic head on the Yunba track has two cables 3, and these two cables 3 are connected through the terminal box of this application embodiment, and at the in-process of connecting, cable fastener 1 can be effectively fixed cable 3, prevents that cable 3 from taking place to loosen.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims (10)

1. A cable fastening device, comprising:

a fixed member (11) and a movable member (12); the fixed part (11) is arranged opposite to the moving part (12), and the moving part (12) can move in a translation mode to be close to or far away from the fixed part (11);

at least one set of folding members, each set of folding members comprises a first folding member (13) and a second folding member (14) which are oppositely arranged along a first direction;

the first folding piece (13) is connected with a first pressing piece (15); the second folding piece (14) is connected with a second pressing piece (16); the first pressing piece (15) and the second pressing piece (16) are arranged oppositely along a first direction; the first pressing piece (15) and the second pressing piece (16) are used for fastening a cable;

the first end of the first folding piece (13) and the first end of the second folding piece (14) are respectively connected with the fixing piece (11); the second end of the first folding piece (13) and the second end of the second folding piece (14) are respectively connected with the moving piece (12);

under the condition that the moving part (12) is far away from the fixed part (11), the first pressing part (15) and the second pressing part (16) are close to each other along a first direction;

the first pressing piece (15) and the second pressing piece (16) are away from each other in a first direction when the moving piece (12) approaches the fixed piece (11).

2. The cable fastening device according to claim 1, wherein the folding members are provided with three sets of the folding members, which are uniformly arranged in a circumferential direction.

3. The cable fastening device according to claim 1, wherein the first crimp element (15) comprises a first compression bar (151), a first crimping plate (152) and a first elastic element (153); a first end of the first pressure lever (151) is connected with the first folding piece (13), and a first elastic piece (153) is connected between a second end of the first pressure lever (151) and a first end of the first wire pressing plate (152);

the second pressing piece (16) comprises a second pressing rod (161), a second pressing plate (162) and a second elastic piece (163); a first end of the second pressure lever (161) is connected with the second folding part (14), and a second elastic part (163) is connected between a second end of the second pressure lever (161) and a first end of the second line pressing plate (162);

the second end of the first wire pressing plate (152) is opposite to the second end of the second wire pressing plate (162) along a first direction; the second end of the first wire pressing plate (152) and the second end of the second wire pressing plate (162) are used for being abutted with a cable to fasten the cable.

4. A cable fastening device according to claim 3, characterized in that the second end of the first crimping plate (152) is provided with a raised and/or a recessed structure; and the second end of the second wire pressing plate (162) is provided with a convex structure and/or a concave structure.

5. The cable fastening device according to claim 1, wherein the fixing member (11) comprises a first fixing member (111) and a second fixing member (112), and the first fixing member (111) and the second fixing member (112) are detachably connected.

6. The cable fastening device according to claim 5, wherein the fixing member (11) further comprises a sealing member disposed between the first fixing member (111) and the second fixing member (112).

7. The cable fastening device according to claim 1, wherein the moving member (12) comprises a sleeve (121) and a collar (122); the collar (122) is sleeved outside the sleeve (121), and the collar (122) can move along the axial direction of the sleeve (121); the second end of the first folding piece (13) and the second end of the second folding piece (14) are respectively connected with the lantern ring (122).

8. The cable fastening device according to claim 7, wherein the moving member (12) further comprises a positioning sleeve having a first positioning portion (1812) and a second positioning portion (1822), the sleeve (121) is rotatably sleeved outside the positioning sleeve, the first positioning portion (1812) abuts against a first end of the sleeve (121) in the axial direction, and the second positioning portion (1822) abuts against a second end of the sleeve (121) in the axial direction.

9. The cable fastening device according to claim 1, further comprising a guide member (17), wherein the guide member (17) is provided with a through hole, and a cable to be fastened is inserted into the through hole; along the first direction, the guide piece (17) is at least oppositely provided with a pair of guide holes (170), and the guide holes (170) are communicated with the through holes; the first presser (15) passes through one of the pair of guide holes (170), and the second presser (16) passes through the other of the pair of guide holes (170).

10. A junction box, characterized in that it comprises a box (2) and a cable fastening device (1) according to any one of claims 1-9; the fixing piece (11) is connected with the box body (2).

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