CN220699801U

CN220699801U - Feeding device for processing sealing strips

Info

Publication number: CN220699801U
Application number: CN202322451716.0U
Authority: CN
Inventors: 殷朝擎; 唐光灵; 吴锦荣; 金大健
Original assignee: Yangzhou Huatong Rubber Plastic Industry Corp
Current assignee: Yangzhou Huatong Rubber Plastic Industry Corp
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2024-04-02
Anticipated expiration: 2033-09-11

Abstract

The utility model discloses a feeding device for processing sealing strips, which comprises a supporting component, wherein the supporting component comprises a supporting seat, an adjusting piece, a grooving piece and a supporting frame, the adjusting piece is fixed on the supporting seat, the grooving piece is positioned in the adjusting piece, and the supporting frame is fixed on the supporting seat; the positioning component is arranged at the top of the supporting seat and comprises a positioning piece, an extrusion piece and a transmission piece, wherein the positioning piece is arranged at the top of the supporting seat; according to the utility model, the positioning assembly is arranged to position the sealing strip in the process of feeding the sealing strip, so that the sealing strip is prevented from shifting, and the qualification rate of sealing strip production is improved.

Description

Feeding device for processing sealing strips

Technical Field

The utility model relates to the technical field of sealing strips, in particular to a feeding device for processing the sealing strips.

Background

A sealing strip is a material for waterproofing, dust-proofing, gas leakage-proofing and soundproofing, and is generally made of flexible materials such as rubber, polyurethane, polypropylene, etc., which can form a tight seal between two objects to protect the inside thereof from the external environment, and can be used in mechanical, electronic, construction, automobile and other industries, and at the same time, can be used for packaging and transportation to ensure the safety and integrity of goods. In the prior art, a cutting device for processing sealing strips is disclosed, and the patent with the application number of 2018216657996 comprises a bottom plate, a feeding plate and a cutting knife; the feeding plate is mounted on the bottom plate in a reciprocating sliding mode through the sliding component, the cutting knife is hinged to the bottom plate and located at one end of a feeding end position of the feeding plate, a feeding area is formed by utilizing an area between the feeding plate and the cutting knife, a fixing mechanism used for assisting in stably cutting the sealing strip is further arranged in the feeding area, the sealing strip is placed in the feeding area based on the structure, one end of the sealing strip abuts against the feeding plate, feeding of the sealing strip can be conveniently achieved by pushing the feeding plate, the cutting length can be conveniently controlled, the fixing mechanism is used for limiting the position of the sealing strip, the stability of the cutting knife in the cutting process is guaranteed, the cutting face is tidy, the structure is simple and convenient, the manufacturing cost is low, the fixing strip can be conveniently positioned, and the technical effect of cutting with fixed length is achieved.

The sealing strip processing facility in the prior art lacks facilities for sealing and positioning, so that the position of the sealing strip is deviated during feeding and conveying, flaws are generated due to unfixed positions in the sealing strip processing process, bad products are generated, and the cost for producing the sealing strip is increased.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the utility model, which should not be used to limit the scope of the utility model.

The present utility model has been made in view of the above-mentioned problems and/or problems occurring in the conventional charging device for sealing tape processing.

Therefore, the problem to be solved by the utility model is that the sealing strip processing facility in the prior art lacks a facility for positioning the sealing strip, so that the position of the sealing strip is deviated during feeding and conveying, flaws are generated due to unfixed positions in the sealing strip processing process, bad products are generated, and the cost for producing the sealing strip is increased.

In order to solve the technical problems, the utility model provides the following technical scheme: the feeding device for processing the sealing strips comprises a supporting assembly, a feeding device and a feeding device, wherein the supporting assembly comprises a supporting seat, an adjusting piece, a grooving piece and a supporting frame, the adjusting piece is fixed on the supporting seat, the grooving piece is positioned in the adjusting piece, and the supporting frame is fixed on the supporting seat;

the positioning assembly is arranged at the top of the supporting seat and comprises a positioning piece, an extrusion piece and a transmission piece, wherein the positioning piece is arranged at the top of the supporting seat, the extrusion piece is fixed on the positioning piece, and the transmission piece is arranged in the positioning piece.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the regulating part comprises a fixing frame, a fixing block, a movable shaft, a worm, a toothed plate, a connecting block and a movable plate, wherein the fixing frame is fixed on the supporting seat, the fixing block is fixed on one side of the fixing frame, the movable shaft is rotationally connected to the top of the fixing block, the worm is fixed on the outer side of the movable shaft, the toothed plate is movably connected to one side of the fixing frame, the connecting block is fixed on one side of the toothed plate, the movable plate is positioned in the fixing frame, and the side face of the movable plate is fixed with the connecting block.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the side of the fixing frame is provided with a sliding groove matched with the connecting block, and the connecting block slides in the sliding groove.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the grooving piece comprises a fixed frame and a cutting frame, wherein the fixed frame is fixed at the top of the supporting seat, and the cutting frame is fixed at the top of the movable plate.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the locating piece includes backup pad, slider, push rod, locating piece and locating plate, the backup pad is fixed in the support frame, the slider slide in the backup pad, the push rod is fixed in the slider bottom, the locating piece rotate connect in the push rod bottom, the locating plate is fixed in locating piece one side.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the locating piece still includes locating tube and stopper, the locating tube is fixed in backup pad one side, the spacing groove has been seted up to the bottom wall in the locating tube, the stopper slide in the spacing groove, the locating plate is located in the locating tube, the stopper top with the locating plate is fixed.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the extrusion piece comprises a mounting seat, a first positioning roller, a movable column, a movable seat, a second positioning roller and a spring, wherein the mounting seat is fixed at the top of the supporting seat, the first positioning roller is rotationally connected in the mounting seat, the movable column is movably connected in the supporting frame, the movable seat is fixed in the bottom end of the movable column, the second positioning roller is rotationally connected in the mounting seat, and the spring is sleeved outside the movable column.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the extrusion part further comprises a limiting column, and the limiting column is fixed at the top of the movable seat.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the transmission piece comprises a first connecting plate, a threaded column, a connecting seat and a positioning column, wherein the first connecting plate is fixed on one side of the fixing frame, the threaded column is rotationally connected to one side of the first connecting plate, the connecting seat is in threaded connection with the outer side of the threaded column, the positioning column is movably connected in the connecting seat, and the bottom end of the positioning column is fixed with the sliding block.

As a preferable scheme of the feeding device for processing the sealing strip, the utility model comprises the following steps: the transmission piece further comprises a second connecting plate and a sliding rod, the second connecting plate is fixed on the inner top wall of the supporting frame, the sliding rod is movably connected in the connecting seat, and two ends of the sliding rod are respectively fixed with the first connecting plate and the second connecting plate.

The utility model has the beneficial effects that: through positioning component's setting, throw the in-process of material to the sealing strip and fix a position it to prevent that the sealing strip from appearing shifting, with this qualification rate that improves sealing strip production.

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 structural view of a charging device for processing a sealing strip.

Fig. 2 is another view of the feeding device for the sealing strip processing.

Fig. 3 is a sectional view of a fixed frame and a movable plate of the feeding device for processing the sealing strips.

Fig. 4 is a connecting structure diagram of a push rod, a positioning block, a positioning plate and a positioning pipe of the feeding device for processing the sealing strips.

Fig. 5 is an enlarged view of the seal strip processing feeding device at a in fig. 4.

Fig. 6 is a sectional view of a positioning tube of the feeding device for processing the sealing strips.

In the figure: 100 supporting component, 200 locating component, 101 supporting seat, 102 regulating piece, 103 slotted piece, 104 support frame, 201 locating piece, 202 extrusion piece, 203 driving piece, 102a mount, 102b fixed block, 102c movable shaft, 102d worm, 102e toothed plate, 102f connecting block, 102g movable plate, S spout, 103a fixed frame, 103b cutting frame, 201a supporting plate, 201b slider, 201c push rod, 201d locating block, 201e locating plate, 201f locating tube, 201g stopper, M spacing groove, 202a mount, 202b first locating roller, 202c movable column, 202d movable seat, 202e second locating roller, 202f spring, 202g spacing column, 203a first connecting plate, 203b threaded column, 203c connecting seat, 203d locating column, 203e second connecting plate, 203f slide bar.

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.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can 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 to 4, in a first embodiment of the present utility model, a feeding device for processing a sealing strip is provided, where the feeding device for processing a sealing strip includes a supporting component 100 and a positioning component 200, and the two components are matched to position the transmission of the sealing strip, so as to prevent the sealing strip from being deviated in the processing process.

Specifically, the support assembly 100 includes a support base 101, an adjusting member 102, a slotting member 103, and a supporting frame 104, where the adjusting member 102 is fixed on the support base 101, the slotting member 103 is located in the adjusting member 102, and the supporting frame 104 is fixed on the support base 101.

The cutting height of the grooving piece 103 is adjusted through the adjusting piece 102, sealing strips of different models can be processed, the positioning assembly 200 is installed through the supporting frame 104, and therefore the positioning assembly 200 is used for correcting and positioning the sealing strips.

Specifically, the positioning assembly 200 is disposed at the top of the supporting seat 101, and includes a positioning member 201, an extrusion member 202 and a transmission member 203, where the positioning member 201 is disposed at the top of the supporting seat 101, the extrusion member 202 is fixed on the positioning member 201, and the transmission member 203 is disposed in the positioning member 201.

Through setting up of setting element 201 for fix a position the transmission of sealing strip, so prevent the condition that the sealing strip from appearing the skew at the in-process of transmission, through the setting of extrusion 202, be used for throwing the material to the sealing strip, and can fix a position the sealing strip of different thickness, be used for correcting the sealing strip through setting up of driving medium 203, thereby in the entering grooving piece 103 that makes the sealing strip can be accurate, carry out the slotting.

Example 2

Referring to fig. 2 to 6, a second embodiment of the present utility model is based on the previous embodiment.

Specifically, the adjusting member 102 includes a fixing frame 102a, a fixing block 102b, a movable shaft 102c, a worm 102d, a toothed plate 102e, a connecting block 102f and a movable plate 102g, wherein the fixing frame 102a is fixed on the supporting seat 101, the fixing block 102b is fixed on one side of the fixing frame 102a, the movable shaft 102c is rotatably connected to the top of the fixing block 102b, the worm 102d is fixed on the outer side of the movable shaft 102c, the toothed plate 102e is movably connected on one side of the fixing frame 102a, the connecting block 102f is fixed on one side of the toothed plate 102e, the movable plate 102g is located in the fixing frame 102a, and the side surface of the movable plate 102g is fixed with the connecting block 102 f.

When the height of the grooving piece 103 needs to be adjusted, the bottom end of the movable shaft 102c is movably connected with the fixed block 102b through a bearing, the movable shaft 102c is rotated at first, the worm 102d is driven by the movable shaft 102c, the worm 102d is meshed with the toothed plate 102e and drives the toothed plate 102e to move, the toothed plate 102e drives the connecting block 102f to move, and the connecting block 102f drives the movable plate 102g to move, so that the grooving piece 103 is driven by the movable plate 102g to move, and the height of the grooving piece 103 is adjusted, so that grooving treatment can be performed on sealing strips with different thicknesses.

Specifically, a sliding slot S is formed on the side surface of the fixing frame 102a, which is matched with the connecting block 102f, and the connecting block 102f slides in the sliding slot S.

Through the setting of spout S for carry out spacing to connecting block 102f, thereby make connecting block 102f remain stable when moving.

Specifically, the grooving member 103 includes a fixed frame 103a and a cutting frame 103b, the fixed frame 103a is fixed to the top of the supporting base 101, and the cutting frame 103b is fixed to the top of the movable plate 102 g.

The sealing bar is supported by the fixing frame 103a, and is grooved by the cutting frame 103b when the sealing bar is moving.

Specifically, the positioning piece 201 includes a supporting plate 201a, a sliding block 201b, a push rod 201c, a positioning block 201d and a positioning plate 201e, the supporting plate 201a is fixed in the supporting frame 104, the sliding block 201b slides in the supporting plate 201a, the push rod 201c is fixed at the bottom of the sliding block 201b, the positioning block 201d is rotatably connected at the bottom of the push rod 201c, and the positioning plate 201e is fixed at one side of the positioning block 201 d.

The two supporting plates 201a are arranged, the two supporting plates 201a are symmetrically fixed on the inner side of the supporting frame 104 and used for limiting the push rod 201c through the sliding block 201b, the push rod 201c is kept stable in moving, one end of the positioning block 201d is driven when the push rod 201c moves, the positioning plate 201e is pushed to move through the positioning block 201d, and the two positioning plates 201e are used for positioning the sealing strip, so that the sealing strip cannot deviate in position when moving.

Specifically, the positioning piece 201 further includes a positioning tube 201f and a limiting block 201g, the positioning tube 201f is fixed on one side of the supporting plate 201a, a limiting groove M is formed in the inner bottom wall of the positioning tube 201f, the limiting block 201g slides in the limiting groove M, the positioning plate 201e is located in the positioning tube 201f, and the top of the limiting block 201g is fixed with the positioning plate 201 e.

The positioning tube 201f is used for being matched with the positioning plate 201e to limit the sealing strip, and the limiting block 201g is used for limiting the direction of one end of the positioning plate 201e, so that the two positioning plates 201e can move to limit the sealing strip.

Example 3

Referring to fig. 1 to 6, a third embodiment of the present utility model is based on the first two embodiments.

Specifically, the extrusion 202 includes a mounting seat 202a, a first positioning roller 202b, a movable column 202c, a movable seat 202d, a second positioning roller 202e and a spring 202f, wherein the mounting seat 202a is fixed on the top of the supporting seat 101, the first positioning roller 202b is rotatably connected in the mounting seat 202a, the movable column 202c is movably connected in the supporting frame 104, the movable seat 202d is fixed at the bottom end of the movable column 202c, the second positioning roller 202e is rotatably connected in the mounting seat 202a, and the spring 202f is sleeved outside the movable column 202 c.

The first positioning roller 202b is rotatably connected in the mounting seat 202a through a rotating shaft, when the sealing strip is fed, one end of the sealing strip firstly passes through the space between the first positioning roller 202b and the second positioning roller 202e, and the sealing strip is positioned at the grooves on the surfaces of the first positioning roller 202b and the second positioning roller 202e, so that the sealing strip is initially positioned, meanwhile, the movable seat 202d is pushed to move through the spring 202f, and the movable seat 202d drives the second positioning roller 202e to move, so that the sealing strip is clamped and driven through the first positioning roller 202b and the second positioning roller 202 e.

Specifically, the extrusion 202 further includes a stopper post 202g, and the stopper post 202g is fixed to the top of the movable seat 202 d.

The limiting post 202g is used for limiting the movable seat 202d, so that the movable seat 202d is prevented from rotating.

Specifically, the transmission member 203 includes a first connecting plate 203a, a threaded post 203b, a connecting seat 203c, and a positioning post 203d, the first connecting plate 203a is fixed on one side of the fixing frame 102a, the threaded post 203b is rotatably connected on one side of the first connecting plate 203a, the connecting seat 203c is in threaded connection with the outer side of the threaded post 203b, the positioning post 203d is movably connected in the connecting seat 203c, and the bottom end of the positioning post 203d is fixed with the sliding block 201 b.

When the position of the sealing strip needs to be corrected, the threaded column 203b is rotated to drive the connecting seat 203c to move through the threaded column 203b, the connecting seat 203c drives the positioning column 203d to move, the positioning column 203d drives the sliding block 201b to move, the sliding block 201b drives the push rod 201c to move, the push rod 201c drives one end of the positioning block 201d to move when moving, the positioning block 201d pushes the positioning plate 201e to move, and the two positioning plates 201e are used for positioning the sealing strip, so that the position of the sealing strip cannot deviate when moving.

Specifically, the transmission member 203 further includes a second connecting plate 203e and a sliding rod 203f, the second connecting plate 203e is fixed on the inner top wall of the supporting frame 104, the sliding rod 203f is movably connected in the connecting seat 203c, and two ends of the sliding rod 203f are respectively fixed with the first connecting plate 203a and the second connecting plate 203 e.

The second connecting plate 203e and the sliding rod 203f are used for limiting the connecting seat 203c, so that the connecting seat 203c moves horizontally in the moving process.

When the sealing strip feeding device is used, when the sealing strip feeding device is used for feeding the sealing strip, one end of the sealing strip firstly passes through a space between the first positioning roller 202b and the second positioning roller 202e, the sealing strip is positioned at grooves on the surfaces of the first positioning roller 202b and the second positioning roller 202e, the sealing strip is initially positioned, meanwhile, the movable seat 202d is pushed to move by the spring 202f, the movable seat 202d drives the second positioning roller 202e to move, when the sealing strip is clamped and transmitted by the first positioning roller 202b and the second positioning roller 202e and the sealing strip is required to be corrected, the threaded column 203b is rotated to drive the connecting seat 203c to move, the connecting seat 203c is driven to drive the positioning column 203d to move, the positioning column 203d is driven to move by the positioning column 203d, the sliding block 201b is driven to move by the sliding block 201c, one end of the positioning block 201d is driven to move by the sliding block 201d, and the two positioning plates 201e are driven to position the sealing strip, so that the sealing strip cannot deviate when the sealing strip is moved.

When the height of the cutting frame 103b needs to be adjusted, the movable shaft 102c is rotated, the worm 102d is driven by the movable shaft 102c, the worm 102d is meshed with the toothed plate 102e and drives the toothed plate 102e to move, the toothed plate 102e drives the connecting block 102f to move, the connecting block 102f drives the movable plate 102g to move, the cutting frame 103b is driven by the movable plate 102g to move, and the height of the cutting frame 103b is adjusted, so that sealing strips with different thicknesses can be grooved.

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

1. Feeding device is used in sealing strip processing, its characterized in that: comprising the steps of (a) a step of,

the support assembly (100) comprises a support seat (101), an adjusting piece (102), a grooving piece (103) and a support frame (104), wherein the adjusting piece (102) is fixed on the support seat (101), the grooving piece (103) is positioned in the adjusting piece (102), and the support frame (104) is fixed on the support seat (101);

the positioning assembly (200) is arranged at the top of the supporting seat (101) and comprises a positioning piece (201), an extrusion piece (202) and a transmission piece (203), wherein the positioning piece (201) is arranged at the top of the supporting seat (101), the extrusion piece (202) is fixed on the positioning piece (201), and the transmission piece (203) is arranged in the positioning piece (201).

2. The sealing strip processing feeding device according to claim 1, wherein: the adjusting piece (102) comprises a fixing frame (102 a), a fixing block (102 b), a movable shaft (102 c), a worm (102 d), a toothed plate (102 e), a connecting block (102 f) and a movable plate (102 g), wherein the fixing frame (102 a) is fixed on the supporting seat (101), the fixing block (102 b) is fixed on one side of the fixing frame (102 a), the movable shaft (102 c) is rotationally connected to the top of the fixing block (102 b), the worm (102 d) is fixed on the outer side of the movable shaft (102 c), the toothed plate (102 e) is movably connected to one side of the fixing frame (102 a), the connecting block (102 f) is fixed on one side of the toothed plate (102 e), the movable plate (102 g) is positioned in the fixing frame (102 a), and the side surface of the movable plate (102 g) is fixed with the connecting block (102 f).

3. The sealing strip processing feeding device according to claim 2, wherein: a sliding groove (S) matched with the connecting block (102 f) is formed in the side face of the fixing frame (102 a), and the connecting block (102 f) slides in the sliding groove (S).

4. A sealing strip processing feeding device according to claim 2 or 3, wherein: the grooving piece (103) comprises a fixed frame (103 a) and a cutting frame (103 b), wherein the fixed frame (103 a) is fixed to the top of the supporting seat (101), and the cutting frame (103 b) is fixed to the top of the movable plate (102 g).

5. The sealing strip processing feeding device according to claim 4, wherein: the locating piece (201) comprises a supporting plate (201 a), a sliding block (201 b), a push rod (201 c), a locating block (201 d) and a locating plate (201 e), wherein the supporting plate (201 a) is fixed in the supporting frame (104), the sliding block (201 b) slides in the supporting plate (201 a), the push rod (201 c) is fixed at the bottom of the sliding block (201 b), the locating block (201 d) is rotationally connected to the bottom of the push rod (201 c), and the locating plate (201 e) is fixed at one side of the locating block (201 d).

6. The sealing strip processing feeding device according to claim 5, wherein: the locating piece (201) further comprises a locating tube (201 f) and a limiting block (201 g), the locating tube (201 f) is fixed on one side of the supporting plate (201 a), a limiting groove (M) is formed in the inner bottom wall of the locating tube (201 f), the limiting block (201 g) slides in the limiting groove (M), the locating plate (201 e) is located in the locating tube (201 f), and the top of the limiting block (201 g) is fixed with the locating plate (201 e).

7. The sealing strip processing feeding device according to claim 6, wherein: the extrusion piece (202) comprises a mounting seat (202 a), a first positioning roller (202 b), a movable column (202 c), a movable seat (202 d), a second positioning roller (202 e) and a spring (202 f), wherein the mounting seat (202 a) is fixed at the top of the supporting seat (101), the first positioning roller (202 b) is rotationally connected in the mounting seat (202 a), the movable column (202 c) is movably connected in the supporting frame (104), the movable seat (202 d) is fixed at the bottom end of the movable column (202 c), the second positioning roller (202 e) is rotationally connected in the mounting seat (202 a), and the spring (202 f) is sleeved outside the movable column (202 c).

8. The sealing strip processing feeding device according to claim 7, wherein: the extrusion (202) further comprises a limiting column (202 g), and the limiting column (202 g) is fixed to the top of the movable seat (202 d).

9. The sealing strip processing feeding device according to claim 7 or 8, wherein: the transmission piece (203) comprises a first connecting plate (203 a), a threaded column (203 b), a connecting seat (203 c) and a positioning column (203 d), wherein the first connecting plate (203 a) is fixed on one side of the fixed frame (102 a), the threaded column (203 b) is rotationally connected to one side of the first connecting plate (203 a), the connecting seat (203 c) is in threaded connection with the outer side of the threaded column (203 b), the positioning column (203 d) is movably connected in the connecting seat (203 c), and the bottom end of the positioning column (203 d) is fixed with the sliding block (201 b).

10. The sealing strip processing feeding device according to claim 9, wherein: the transmission piece (203) further comprises a second connecting plate (203 e) and a sliding rod (203 f), the second connecting plate (203 e) is fixed on the inner top wall of the supporting frame (104), the sliding rod (203 f) is movably connected in the connecting seat (203 c), and two ends of the sliding rod (203 f) are respectively fixed with the first connecting plate (203 a) and the second connecting plate (203 e).