CN220924962U - Protection machanism and strorage device of MPO wire jumper - Google Patents

Abstract

The utility model discloses a protection mechanism and a storage device of an MPO jumper, and relates to the field of protection of MPO jumpers, comprising a placement assembly, a storage device and a storage device, wherein the placement assembly comprises a rotating part, a limiting part positioned at the outer side of the rotating part, a locking part positioned at the top end of the rotating part, an adjusting part positioned at the outer side of the rotating part and a fixing part positioned at one end of the adjusting part; the rotating piece comprises a sleeve, a first gear is arranged outside the sleeve, a toothed plate is arranged outside the first gear, a right angle plate is arranged at the top of the toothed plate, the toothed plate is arranged relative to the first gear array, and the toothed plate is meshed with the first gear. According to the utility model, through the arrangement of the protection mechanism, the protection mechanism can limit and protect the MPO jumper wires, so that the MPO jumper wires are prevented from winding and stacking, the overall protection effect of the protection mechanism is optimized, the MPO jumper wires of different types can be limited and protected after the protection mechanism is adjusted, and the use limitation of the protection mechanism is reduced.

Description

Protection machanism and strorage device of MPO wire jumper

Technical Field

The utility model relates to the field of protection of MPO jumpers, in particular to a protection mechanism and a storage device of the MPO jumpers.

Background

The MPO optical fiber jumper has the important position in increasingly-increased optical communication due to the advantages of multiple cores, small volume, high transmission rate and the like, the scheme of high-density wiring of a data center can be met, the protection mechanism of the MPO optical fiber jumper is a limiting device for protecting MPO optical fiber jumpers of different types, the existing MPO optical fiber jumpers are generally directly stacked in a placement box when being stored, the MPO optical fiber jumpers are easily wound and knotted after being stacked for a long time, a great deal of time is required to be spent for disassembling the wound MPO optical fiber jumpers when the MPO optical fiber jumpers are taken for use, and the protection mechanism is inconvenient for later use of the MPO optical fiber jumpers.

And the closing plate of the strorage device of MPO wire jumper among the prior art is non-rotatable, and accomodate lid board in the prior art and adopt the bolt structure to fix generally, need dismantle the apron and take when taking and use the MPO wire jumper, need with the help of external tool when dismantling, complex operation provides a strorage device of MPO wire jumper for this.

Disclosure of utility model

This section is intended to summarize some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments, which may be simplified or omitted in this section, as well as the description abstract and the title of the utility model, to avoid obscuring the objects of this section, description abstract and the title of the utility model, which is not intended to limit the scope of this utility model.

The present utility model has been made in view of the above and/or problems occurring in the prior art.

Therefore, the utility model aims to solve the technical problem that the use is affected by easy winding when the existing MPO jumper is stacked.

In order to solve the technical problems, the utility model provides the following technical scheme: the protection mechanism comprises a placement assembly, a positioning assembly and a protection assembly, wherein the placement assembly comprises a rotating piece, a limiting piece positioned on the outer side of the rotating piece, a locking piece positioned on the top end of the rotating piece, an adjusting piece positioned on the outer side of the rotating piece and a fixing piece positioned at one end of the adjusting piece;

The rotating piece comprises a sleeve, a first gear is arranged outside the sleeve, a toothed plate is arranged outside the first gear, and a right angle plate is arranged at the top of the toothed plate.

As a preferred embodiment of the protection mechanism according to the utility model, wherein: the toothed plate is arranged symmetrically about the center of the first gear, and is meshed with the first gear.

As a preferred embodiment of the protection mechanism according to the utility model, wherein: the limiting piece comprises a limiting disc, a connecting disc is arranged at the bottom of the limiting disc, and a limiting frame is arranged at the outer side of the connecting disc;

the locking piece comprises a prism, a limit bolt is arranged at the top of the prism, and a fixing nut is arranged outside the limit bolt.

As a preferred embodiment of the protection mechanism according to the utility model, wherein: the limiting plate and the connecting plate are respectively provided with two connecting plates, the connecting plate is movably connected with the sleeve, and the connecting plate is attached to the limiting plate;

The limit bolt is connected with the sleeve in a sleeved mode, the limit bolt is connected with the sleeve in a threaded mode, and the limit bolt is connected with the fixing nut in a threaded mode.

As a preferred embodiment of the protection mechanism according to the utility model, wherein: the adjusting piece comprises a limiting ring and a connecting column, a second gear is arranged on the outer side of the limiting ring, and a connecting rod is arranged on the outer side of the second gear;

The fixing piece comprises a rotating handle, and a clamping block is arranged on the outer wall of the rotating handle.

As a preferred embodiment of the protection mechanism according to the utility model, wherein: the limiting rings are longitudinally arranged with respect to the sleeve, and are in meshed connection with the second gear;

The connecting column is sleeved with the sleeve;

The rotating handle is in sliding connection with the connecting rod, and the clamping blocks are symmetrically arranged on the rotating handle in an axis.

The utility model has the beneficial effects that: through the setting of protection machanism for protection machanism can carry out spacing protection to the MPO wire jumper, avoids the MPO wire jumper to appear winding when piling up, has optimized protection machanism's whole protection effect, and the MPO wire jumper of different models all can obtain spacing protection, has reduced protection machanism's use limitation.

In view of the foregoing and/or problems with the prior art, a storage device for MPO jumpers has been proposed.

Therefore, the utility model aims to solve the technical problem that the cover plate of the storage device of the existing MPO jumper is inconvenient to open.

In order to solve the technical problems, the utility model also provides the following technical scheme: comprising a protective mechanism as claimed in any one of the claims; the protection assembly comprises a storage piece, a support piece is arranged on the inner side of the storage piece, a sliding piece is arranged on the outer side of the support piece, the storage piece comprises a storage box, a dust cover is arranged on the storage box, the sliding piece comprises a sliding block, and a limiting plate is arranged inside the sliding block;

the limiting plate is in sliding connection with the sliding block.

As a preferred embodiment of the storage device for MPO jumpers according to the present utility model, wherein: the support piece comprises a mounting plate, a fixed block is arranged on the outer side of the mounting plate, a spring is arranged on the top end of the fixed block, a clamping block is arranged on the top of the spring, an eccentric shaft is arranged on the inner side of the clamping block, a connecting frame is arranged on the outer side of the eccentric shaft, and a connecting plate is arranged on the outer side of the connecting frame.

As a preferred embodiment of the storage device for MPO jumpers according to the present utility model, wherein: the mounting plate is connected with the storage box through screws, the clamping blocks are hinged with the eccentric shafts, the eccentric shafts are connected with the connecting plates through connecting frames, and the connecting plates are hinged with the connecting frames.

As a preferred embodiment of the storage device for MPO jumpers according to the present utility model, wherein: the connecting plate is connected with the storage box through screws, and the connecting frame is connected with the limiting plate through the connecting plate.

The utility model has the beneficial effects that: through the cooperation between support piece and the slider, make the shield can rotate to open, reduced the operating procedure of shield, make things convenient for the better storage box of putting into of MPO wire jumper, shortened the opening time of shield, when closing simultaneously, avoided the dust to get into in the storage box, improved strorage device's dust resistance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

Fig. 1 is a schematic view of the overall structure of a protection mechanism according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a rotary member of a protection mechanism according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an adjusting member of a protection mechanism according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a protection mechanism according to one embodiment of the present utility model;

FIG. 5 is a schematic diagram illustrating an overall structure of a storage device for MPO jumpers according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a support structure of a storage device for MPO jumpers according to an embodiment of the present utility model;

Fig. 7 is a schematic diagram of an overall structure of a protection mechanism and a storage device for MPO jumpers according to an embodiment of the present utility model.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the utility model is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Further still, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 and 2, a first embodiment of the present utility model provides a protection mechanism.

The protection mechanism includes a placement assembly 100.

Specifically, place the subassembly 100, including rotating member 101, the locating part 102 is installed to rotating member 101's outside symmetry, rotating member 101 top threaded connection has retaining member 103, rotating member 101 includes sleeve 101a, sleeve 101a outside welding has first gear 101b, first gear 101b outside meshing is even has pinion 101c, pinion 101c is arranged about first gear 101b array, pinion 101c top welding has right-angle board 101d, retaining member 102 includes spacing dish 102a, spacing dish 102a bottom laminating is connected with connection pad 102b, spacing 102b outside symmetry welding has spacing 102c, retaining member 103 includes prismatic 103a, prismatic 103a slidable mounting is inside sleeve 101a, prismatic 103a top threaded connection has spacing bolt 103b, spacing bolt 103b outside threaded connection has fixation nut 103c, through the setting of connection pad 102b and spacing 102c, it is spacing to make pinion 101c normal upper and lower, left and right movement, setting through spacing dish 102a, the setting of spacing dish 102b is worth noting that the displacement is carried out on sleeve 101a, tooth 101b is worth noting with first gear 101c, it is guaranteed that: the transparent protective cover is nested on the outer wall of the rotating piece 101, sliding grooves are formed in two sides of the outer wall of the protective cover, and the protective cover penetrates through the upper portion and the lower portion of the protective cover.

Preferably, through rotating sleeve 101a, at this moment under sleeve 101 a's drive first gear 101b rotates, meshing cooperation between first gear 101b and the pinion rack 101c, and then under first gear 101 b's rotation, make two pinion racks 101c in the first gear 101b outside outwards move, form reverse movement, right angle plate 101d welds at pinion rack 101c top, under pinion rack 101c removes, make the right angle plate 101d on pinion rack 101c top realize reverse movement, can satisfy the spacing protection needs of different model MPO jumpers, avoided the MPO jumper to appear winding phenomenon of knoing, it is more convenient when taking the use.

Further, the limit bolt 103b rotates clockwise, the prism 103a rotates clockwise under the drive of the limit bolt 103b, at this time, through the sleeve joint fit between the prism 103a and the sleeve 101a, the sleeve 101a rotates under the action of the prism 103a, at this time, the first gear 101b on the outer wall of the sleeve 101a rotates under the action of the sleeve 101a, the toothed plate 101c on the outer wall of the first gear 101b moves towards the opposite directions of the two sides of the first gear 101b, and then the rectangular plate 101d on the top of the toothed plate 101c is driven to move towards the opposite directions of the two sides of the first gear 101b, so that the rectangular plate 101d performs position adjustment according to MPO jumpers of different types, and all MPO jumpers of the same type can be limited and protected.

When the four-wheel type MPO jumper wire protection mechanism is used, the limit bolt 103b is rotated, the prism 103a is driven by the limit bolt 103b to rotate, the sleeve 101a on the outer wall of the prism 103a is further rotated, the first gear 101b is driven by the sleeve 101a to rotate, the toothed plate 101c on the outer side of the first gear 101b is further moved left and right, position movement of the right angle plate 101d on the top end of the toothed plate 101c is achieved, position adjustment is conveniently carried out according to different types of MPO jumper wires, limit protection can be carried out on the MPO jumper wires of different types, after position adjustment of the right angle plate 101d is completed, the fixing nut 103c on the outer wall of the limit bolt 103b is rotated, limit of the limit bolt 103b is achieved, the limit bolt 103b cannot rotate, the phenomenon that the sleeve 101a is driven by the limit bolt 103b to rotate, the position of the right angle plate 101d is moved is avoided, the MPO jumper wire is enabled to be more stable after limit protection, and the use limitation of a protection mechanism is reduced.

Example 2

Referring to fig. 1, 3 and 4, a second embodiment of the present utility model is based on the previous embodiment, and is different from the previous embodiment in that: this embodiment provides a storage device for MPO jumpers.

The placement assembly 100 includes an adjustment member 104.

Specifically, the adjusting piece 104 includes spacing ring 104a and spliced pole 104b, spacing ring 104a is vertical arrangement setting about sleeve 101a, spliced pole 104b cup joints inside sleeve 101a, spacing ring 104a outside meshing is connected with second gear 104c, the welding of second gear 104c outside has connecting rod 104d, the outer wall of connecting rod 104d cup joints the twist grip 105a, the symmetrical welding of twist grip 105a outer wall has fixture block 105b, cup joint with sleeve 101a through spliced pole 104b, make things convenient for sleeve 101a to reciprocate on the outside of spliced pole 104b, play certain spacing effect to sleeve 101a simultaneously and lead to.

Preferably, by rotating the connecting rod 104d, the second gear 104c is driven by the connecting rod 104d to rotate, and by meshing and rotating the second gear 104c with the limiting ring 104a, the position of the sleeve 101a is adjusted, so that adjustment and limiting according to the thickness of the MPO jumper are facilitated.

Further, after the adjusting piece 104 is used, the rotating handle 105a is pushed to enable the clamping block 105b on the outer side of the rotating handle 105a to be embedded into the limit groove formed on the outer side of the storage box, the adjusting piece 104 is fixed, the adjusting piece 104 is prevented from rotating again at the adjusted height, and limit protection of the MPO jumper is ensured.

When the MPO jumper wire protection mechanism is used, the rotating handle 105a is rotated, the connecting rod 104d rotates under the drive of the rotating handle 105a, the connecting rod 104d drives the second gear 104c to be in meshed connection with the connecting ring 104a, the sleeve 101a on the inner wall of the connecting ring 104a moves up and down on the outer wall of the connecting column 104b, the height of the rotating member 101 is conveniently adjusted according to MPO jumper wires of different types, the rotating member 101 can limit and protect the MPO jumper wires of different types, and the use limitation of the protection mechanism is reduced.

Example 3

Referring to fig. 1 to 7, for a third embodiment of the present utility model, a protection mechanism and a storage device for an MPO jumper are provided, and the working principle of the second embodiment is easy to combine with the embodiment:

Specifically, the protection component 200 comprises a storage piece 201, a support piece 202 in the storage piece 201, the support piece 202 comprises a mounting plate 202a, the mounting plate 202a is connected with a storage box 201a through a screw, a fixing block 202b is welded on the outer side of the mounting plate 202a, a spring 202c is connected to the top end of the fixing block 202b through a limiting rod, the storage box 201a is conveniently extruded according to the opening angle of a dust cover 201b through the arrangement of the spring 202c, simultaneously, the dust cover 201b can be conveniently and rapidly rebounded when being closed, the operation is more labor-saving, a clamping block 202d is welded on the top of the spring 202c, an eccentric shaft 202e is hinged on the inner side of the clamping block 202d, a connecting frame 202f is welded on the outer side of the eccentric shaft 202e, the eccentric shaft 202e is connected with a connecting plate 202g through the connecting frame 202f, the connecting plate 202g is hinged on the outer side of the connecting frame 202f, a connecting plate 202g is connected with the limiting plate 203b through a screw, the sliding piece 203 on the outer side of the support piece 202 comprises the storage box 201a, the storage box 201a is hinged with the dust cover 201b through the sliding piece 203, the sliding piece 203a sliding piece 203 comprises the sliding piece 203, the sliding piece 203a sliding piece is arranged on the sliding cover, the sliding cover 203a is arranged on the inner side of the sliding cover 203a, the sliding cover 203b is arranged on the inner side of the sliding cover, the dust cover is required to be opened, the dust cover 201b is reduced, the dust cover is required to be opened, the dust cover 201b is opened, the dust cover is mounted on the dust cover is required to be opened, the dust cover 201b is opened, the dust cover is mounted and the dust cover is opened, the dust cover 201b is required to be opened, and the dust is opened, the dust is opened and the dust cover is and the dust-proof device is 201 and the dust cover is opened and the dust-proof device is opened.

Further, through fixed connection cooperation between shield 201b and connecting plate 202g, upwards overturn shield 201b, drive connecting plate 202g and rotate under shield 201 b's effect, articulated cooperation between connecting plate 202g and link 202f, drive the one end of link 202f and rotate under connecting plate 202 g's effect, through eccentric shaft 202e and mounting panel 202a articulated cooperation, at this moment under the effect of link 202f, eccentric shaft 202e of the other end of link 202f rotates in mounting panel 202 a's outside, through eccentric shaft 202e and grip block 202d articulated cooperation, make grip block 202d rotate, spring 202c pulling grip block 202d bottom takes place elastic deformation, reach the opening of shield 201b, the convenient putting of MPO.

When the dust cover 201b is used, firstly, the dust cover 201b is pulled to move upwards by holding the holding groove on the outer side of the dust cover 201b, meanwhile, the limiting plate 203b on the inner side of the dust cover 201b moves up and down in the sliding block 203a, one side of the connecting plate 202g is driven to move in a semicircular mode under the movement of the limiting plate 203b, the connecting plate 202g is hinged to the connecting frame 202f, the semicircular movement of the connecting frame 202f is achieved, the eccentric shaft 202e at the bottom of the connecting frame 202f is hinged to the clamping block 202d, the spring 202c at the bottom of the clamping block 202d is further stretched, at the moment, the dust cover 201b can rotate and adjust at multiple angles along with the rotation of the supporting piece 202, the rotation of the dust cover 201b is achieved, the operation steps of the dust cover 201b are reduced, the opening time of the dust cover 201b is shortened, and the portability of the storage box 201a is enhanced.

It is important to note that the construction and arrangement of the utility model as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. A protection mechanism, characterized in that: comprising the steps of (a) a step of,

The placement assembly (100) comprises a rotating piece (101), a limiting piece (102) positioned on the outer side of the rotating piece (101), a locking piece (103) positioned on the top end of the rotating piece (101), an adjusting piece (104) positioned on the outer side of the rotating piece (101) and a fixing piece (105) positioned on one end of the adjusting piece (104);

The rotating piece (101) comprises a sleeve (101 a), a first gear (101 b) is arranged on the outer side of the sleeve (101 a), a toothed plate (101 c) is arranged on the outer side of the first gear (101 b), and a rectangular plate (101 d) is arranged on the top of the toothed plate (101 c).

2. The protection mechanism of claim 1, wherein: the toothed plate (101 c) is arranged in a central symmetry manner relative to the first gear (101 b), and the toothed plate (101 c) is connected with the first gear (101 b) in a meshing manner.

3. The protection mechanism according to claim 1 or 2, characterized in that: the limiting piece (102) comprises a limiting disc (102 a), a connecting disc (102 b) is arranged at the bottom of the limiting disc (102 a), and a limiting frame (102 c) is arranged outside the connecting disc (102 b);

The locking piece (103) comprises a prism (103 a), a limit bolt (103 b) is arranged at the top of the prism (103 a), and a fixing nut (103 c) is arranged on the outer side of the limit bolt (103 b).

4. A protection mechanism according to claim 3, wherein: two limiting plates (102 a) and two connecting plates (102 b) are arranged, the connecting plates (102 b) are movably connected with the sleeve (101 a), and the connecting plates (102 b) are attached to the limiting plates (102 a);

The limit bolt (103 b) is in threaded connection with the prism (103 a), and the limit bolt (103 b) is in threaded connection with the fixing nut (103 c).

5. The protection mechanism according to any one of claims 1 to 4, wherein: the adjusting piece (104) comprises a limiting ring (104 a) and a connecting column (104 b), a second gear (104 c) is arranged on the outer side of the limiting ring (104 a), and a connecting rod (104 d) is arranged on the outer side of the second gear (104 c);

The fixing piece (105) comprises a rotating handle (105 a), and a clamping block (105 b) is arranged on the outer wall of the rotating handle (105 a).

6. The protection mechanism of claim 5, wherein: the limiting rings (104 a) are longitudinally arranged relative to the sleeve (101 a), and the limiting rings (104 a) are in meshed connection with the second gear (104 c);

The connecting column (104 b) is sleeved with the sleeve (101 a);

the rotating handle (105 a) is in sliding connection with the connecting rod (104 d), and the clamping blocks (105 b) are symmetrically arranged on the rotating handle (105 a) in an axis.

7. The utility model provides a strorage device of MPO wire jumper which characterized in that: comprising a protection mechanism according to any one of claims 1 to 6; and

The protection assembly (200) comprises a storage piece (201), wherein a support piece (202) is arranged on the inner side of the storage piece (201), a sliding piece (203) is arranged on the outer side of the support piece (202), the storage piece (201) comprises a storage box (201 a), a dust cover (201 b) is arranged on the storage box (201 a), the sliding piece (203) comprises a sliding block (203 a), and a limiting plate (203 b) is arranged inside the sliding block (203 a);

Wherein the limiting plate (203 b) is in sliding connection with the sliding block (203 a).

8. The MPO jumper storage device of claim 7, wherein: the support piece (202) comprises a mounting plate (202 a), a fixed block (202 b) is arranged on the outer side of the mounting plate (202 a), a spring (202 c) is arranged on the top end of the fixed block (202 b), a clamping block (202 d) is arranged on the top of the spring (202 c), an eccentric shaft (202 e) is arranged on the inner side of the clamping block (202 d), a connecting frame (202 f) is arranged on the outer side of the eccentric shaft (202 e), and a connecting plate (202 g) is arranged on the outer side of the connecting frame (202 f).

9. The MPO jumper storage device of claim 8, wherein: the mounting plate (202 a) is connected with the storage box (201 a) through screws, the clamping block (202 d) is hinged with the eccentric shaft (202 e), the eccentric shaft (202 e) is connected with the connecting plate (202 g) through the connecting frame (202 f), and the connecting plate (202 g) is hinged with the connecting frame (202 f).

10. The MPO jumper storage device of claim 9, wherein: the connecting plate (202 g) is connected with the storage box (201 a) through screws, and the connecting frame (202 f) is connected with the limiting plate (203 b) through the connecting plate (202 g).