CN112095945A

CN112095945A - Energy-saving decorative guardrail convenient to install

Info

Publication number: CN112095945A
Application number: CN202011033790.5A
Authority: CN
Inventors: 丁利斌; 白琳波; 刘波; 李萍; 黄志讲; 廖国强
Original assignee: Shenzhen Maxima Decoration Group Co ltd
Current assignee: Shenzhen Maxima Decoration Group Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2020-12-18
Anticipated expiration: 2040-09-27
Also published as: CN112095945B

Abstract

The application relates to an energy-saving decorative guardrail convenient to install, which relates to a decorative guardrail, and comprises a plurality of bolts pre-embedded on a balcony and a base for the bolts to pass through, wherein one end of each bolt passing through the base is connected with a nut in a threaded manner, vertical rods are arranged on the base, a cross beam is arranged between the adjacent vertical rods, the cross beam and the base are arranged oppositely, at least two cross rods are arranged between the adjacent vertical rods and below the cross beam, vertical rods are arranged between the adjacent cross rods, and the cross rods are connected with the vertical rods through connecting pieces; the effect of this application lies in convenient dismantlement and change base, and the cost of manufacture is low, and is energy-concerving and environment-protective.

Description

Energy-saving decorative guardrail convenient to install

Technical Field

The application relates to a decorative guardrail, in particular to an energy-saving decorative guardrail convenient to install.

Background

Along with economic development, the living standard of people improves, and building is higher and higher, and the balcony is an important component of building, and the balcony can be used for the sunning clothing, vwatchs scenery etc. so also be a place that the resident often moves about, in order to reduce the personnel on the balcony and take place the falling incident, consequently install the guardrail on the balcony and be indispensable.

Chinese patent with grant bulletin number CN205804806U discloses a balcony safety barrier, which comprises a vertical column, a surface tube, an upper cross rod and a lower cross rod, an arc vertical tube is arranged between the upper cross rod and the lower cross rod, a vertical column base is arranged at the bottom end of the vertical column, the vertical column base is welded and fixed with the vertical column, a fixed expansion bolt is arranged on the vertical column base, the upper cross rod, a horizontal tube fixing seat is arranged at the joint of the lower cross rod and the vertical column, an installation support lug is arranged at the joint of the top of the vertical column and the surface tube, the installation support lug is fixed on the bottom surface of the surface tube through an installation screw rod, a jack is arranged on the bottom surface of the surface tube, an insertion block protruding upwards is arranged at the end of the installation support lug, a positioning jack is arranged on the insertion block, a plug rod is arranged in a tube hole of the surface tube.

In view of the related art in the above, the inventors consider that there are drawbacks in that: when installing this guardrail, utilize fixed expansion bolts to carry out fixed mounting with the stand base, then need install the stand on the stand base through the welded mode, it is inconvenient to install.

Disclosure of Invention

In order to improve the inconvenient problem of balcony installation, this application provides an energy-conserving decoration guardrail convenient to installation.

The application provides a pair of energy-conserving decoration guardrail convenient to installation adopts following technical scheme:

the utility model provides an energy-conserving decoration guardrail convenient to installation, includes pre-buried a plurality of bolt on the balcony and supplies the base that the bolt passed, the one end threaded connection that the bolt passed the base has the nut, be equipped with the pole setting on the base, it is adjacent be equipped with the crossbeam between the pole setting, set up relatively between crossbeam and the base, it is adjacent just be equipped with two at least horizontal poles below that is located the crossbeam between the pole setting, it is adjacent be equipped with the montant between the horizontal pole, the horizontal pole passes through the connecting piece and is connected with the pole setting.

By adopting the technical scheme, when the guardrail is installed, the base is sleeved on the bolt, the nut is screwed, the cross rods are installed between the vertical rods by using the connecting piece, the vertical rods are installed between the cross rods, and the cross beam is installed on the vertical rods, so that the guardrail can be installed conveniently and quickly; when the base needs to be disassembled and replaced, the nut is unscrewed, and the base can be moved away, so that the base can be conveniently disassembled and replaced, the manufacturing cost is low, and the base is energy-saving and environment-friendly.

Optionally, a cavity is arranged in the base;

a polished rod is connected in the vertical rod in a sliding manner, a rectangular block is arranged at one end of the polished rod, which is far away from the base, a fixing groove for the rectangular block to be inserted into is arranged on the inner top wall of the vertical rod, and a screw which is screwed into the fixing groove and is in threaded connection with the rectangular block is arranged on the vertical rod;

one end, far away from the rectangular block, of the polish rod extends into the cavity, a steel wire ring for a bolt to penetrate through is arranged at one end, extending into the cavity, of the polish rod, a vertical steel wire is arranged on the steel wire ring, and a sliding hole for the vertical steel wire to extend out is formed in the top wall of the base;

the nut is characterized in that a waist-shaped groove for the vertical steel wire to extend out is formed in the side wall of the nut, a connecting hook is arranged at one end of the vertical steel wire extending out of the waist-shaped groove, and a convex block for the connecting hook to be connected with the connecting hook is arranged on the outer side wall of the nut.

Through adopting above-mentioned technical scheme, when the installation base, pass the base with the screw rod earlier, steel wire winding overlaps in the screw rod outside simultaneously, the nut is screwed again, remove the polished rod, drive vertical steel wire stretch out the hole of sliding and insert in the waist type groove, connect after colluding and stretch out waist type groove, break off curved with the fingers and thumb with vertical steel wire, thereby collude with the lug and link, rotate the polished rod again, it warp to drive the steel wire winding, and straighten vertical steel wire, collude tight lug with connecting, remove the polished rod again, insert the rectangular block in the fixed slot, at last with screw in the fixed slot and with rectangular block threaded connection, with this can lock the nut on the screw rod, reduce the nut and take place not hard up possibility, increase the installation stability of base on the balcony.

Optionally, the connecting piece is including setting up the inserted block on the horizontal pole end wall, be equipped with on the lateral wall of pole setting and supply the inserted logical groove of inserted block, establish on the lateral wall of polished rod with lead to the slot that the groove intercommunication set up.

By adopting the technical scheme, the cross rod can be conveniently and quickly arranged on the vertical rod by inserting the inserting blocks into the inserting grooves and the installing grooves in sequence; meanwhile, the jacks are inserted into the slots and the mounting grooves, so that the possibility of rotation of the polished rod is reduced.

Optionally, the side wall of the cross rod is provided with a positioning groove, and the end wall of the vertical rod is provided with a positioning block inserted into the positioning groove.

Through adopting above-mentioned technical scheme, utilize the locating piece to insert in the constant head tank, be favorable to the easy to assemble montant, also can conveniently install a plurality of horizontal poles in the pole setting.

Optionally, at least two supporting rods are arranged on one side, close to the indoor, of the beam, a motor is arranged in the supporting rods, a rotating shaft is coaxially arranged on a driving shaft of the motor, a connecting rope is arranged on the rotating shaft, one end, far away from the rotating shaft, of the connecting rope penetrates through the supporting rods, one end, penetrating through the supporting rods, of the connecting rope is provided with hook rings, and a pot culture frame is arranged between the hook rings.

By adopting the technical scheme, when the balcony needs to be greened, the pot plant is placed on the pot plant frame, the rotating shaft is driven to rotate by the motor, so that the connecting rope can be wound on the rotating shaft, the pot plant frame and the pot plant can be conveniently and quickly driven to move up and down, and the balcony can adapt to pot plants with different sizes; can afforest the balcony through cultivated in a pot, afforest the environmental protection.

Optionally, it is adjacent be equipped with empty core rod between the bracing piece, empty core rod is located the bracing piece and keeps away from one side of crossbeam, empty core rod internal rotation is connected with the spool, around being equipped with the fly net on the spool lateral wall, the one end that the spool was kept away from to the fly net is equipped with the dead lever, be equipped with the mounting that is used for fixing a position the dead lever on the base.

By adopting the technical scheme, mosquitoes are easy to attract when the potted plants are planted, at the moment, the insect-proof net is pulled down, and the fixing rod is fixed by the fixing piece, so that the possibility that the mosquitoes enter the room can be reduced; utilize the fly net to keep apart potted plant, also can reduce the cat and dog at home and overturn the possibility cultivated in a pot.

Optionally, a coil spring is arranged on the reel, and one end of the coil spring is connected with the reel while the other end is connected with the hollow rod.

Through adopting above-mentioned technical scheme, when loosening the fly net, the coil spring resets, conveniently winds the fly net on the spool.

Optionally, a positioning gap is formed in the base, a moving groove is formed in the groove wall of the positioning gap, and an inserting plate extending into the positioning gap is arranged on one side, away from the insect-proof net, of the fixed rod;

the mounting is including setting up the spring on the shifting chute diapire, the one end that the shifting chute diapire was kept away from to the spring is equipped with the movable plate that slides at the shifting chute, the one end that the movable plate stretches out the shifting chute is contradicted with the roof of picture peg and is set up, the length of movable plate is less than the length of picture peg.

By adopting the technical scheme, when the fixed rod moves to the base, the movable plate is moved firstly, the spring is extruded, the inserting plate is inserted into the positioning notch, the movable plate is loosened, the movable plate is abutted against the inserting plate, and therefore the inserting plate can be fixed in the positioning notch, and the insect-proof net can be stably unfolded.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the guardrail is installed, the base is sleeved outside the bolt, the nut is screwed, the cross rod is installed on the vertical rod through the connecting piece, and the vertical rod and the cross beam are installed, so that the guardrail can be conveniently and quickly disassembled and installed, the manufacturing cost is low, and the guardrail is energy-saving and environment-friendly;

2. the positioning block is inserted into the positioning groove, so that the vertical rod is convenient to mount;

3. utilize the potted plant frame, conveniently place cultivated in a pot, be favorable to afforesting the balcony, energy-concerving and environment-protective.

Drawings

Fig. 1 is a schematic structural view of an energy-saving decorative guardrail convenient to mount according to an embodiment of the application.

Fig. 2 is a schematic sectional view of the plane a-a in fig. 1.

Fig. 3 is a schematic structural diagram of a connecting hook and a bump in an embodiment.

Fig. 4 is a schematic cross-sectional view of the plane B-B in fig. 1.

Fig. 5 is a schematic cross-sectional view of the plane C-C in fig. 1.

Fig. 6 is an enlarged view of a portion a of fig. 5.

Description of reference numerals: 1. a balcony; 2. a bolt; 3. a base; 30. a cavity; 31. a polish rod; 32. a rectangular block; 33. fixing grooves; 34. a screw; 35. a bead ring; 36. vertical steel wires; 37. a sliding hole; 38. a waist-shaped groove; 39. a connecting hook; 300. a bump; 301. a through groove; 302. a slot; 303. positioning the notch; 304. a moving groove; 305. a spring; 306. moving the plate; 307. a handle; 308. a rectangular limiting groove; 309. a limiting block; 4. a nut; 5. erecting a rod; 6. a cross beam; 60. a connecting bolt; 61. a support bar; 62. a motor; 63. a rotating shaft; 64. connecting ropes; 65. hooking a ring; 66. potting; 67. a hollow shaft; 68. a reel; 69. an insect-proof net; 600. fixing the rod; 601. a fixing member; 602. a coil spring; 603. inserting plates; 7. a cross bar; 70. positioning a groove; 71. positioning blocks; 8. a connecting member; 80. inserting a block; 9. a vertical rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses energy-conserving decorative guardrail convenient to installation.

Referring to fig. 1, an energy-saving decorative guardrail convenient to install comprises at least two groups of bolts 2 pre-embedded on a balcony 1 and a base 3 for the bolts 2 to pass through, wherein the number of the bolts 2 can be two, the base 3 is provided with nuts 4 in threaded connection with the bolts 2, the nuts 4 are in contact with the top wall of the base 3, the base 3 is provided with upright posts 5, the upright posts 5 are hollow, a cross beam 6 is arranged between the adjacent upright posts 5, the cross beam 6 is positioned on the top wall of the upright posts 5 and is opposite to the base 3, the cross beam 6 is installed on the upright posts 5 through a connecting bolt 60, at least two cross rods 7 are arranged between the adjacent upright posts 5, the number of the cross rods 7 can be two, the cross rods 7 are connected with the upright posts 5 through connecting pieces 8, vertical rods 9 are arranged between the; when the construction installation, at first overlap base 3 on bolt 2, screw nut 4 on base 3 again, and support nut 4 tightly on base 3's roof, recycle connecting piece 8 and install horizontal pole 7 in pole setting 5, and install montant 9 between adjacent two horizontal poles 7, utilize connecting bolt 60 to install crossbeam 6 on pole setting 5 at last, utilize bolt 2 with base 3 fixed mounting on balcony 1, also can dismantle the guardrail and change convenient and fast, the operation is simple, low in manufacturing cost, convenient replacement, be favorable to energy-concerving and environment-protective.

Referring to fig. 2, a cavity 30 communicated with the inner cavity of the upright rod 5 is arranged in the base 3, and a rectangular limiting groove 308 is arranged on the bottom wall of the cavity 30.

Referring to fig. 1 and 2, a polish rod 31 is connected in the vertical rod 5 in a sliding manner along the axis of the polish rod 31, one end of the polish rod 31 extends out of the vertical rod 5 and extends into the cross beam 6, the other end of the polish rod 31 extends into the cavity 30, a rectangular block 32 is arranged in one side of the polish rod 31 close to the cross beam 6 and located in the vertical rod 5, a fixing groove 33 for inserting the rectangular block 32 is arranged on the inner top wall of the vertical rod 5, and a screw 34 screwed into the fixing groove 33 and connected with the rectangular block 32 through threads is arranged.

Referring to fig. 2, a steel wire ring 35 for the bolt 2 to pass through is arranged at one end of the polished rod 31 extending into the cavity 30, the diameter of the steel wire ring 35 can be two millimeters, and a limit block 309 inserted into the rectangular limit groove 308 is arranged at one end of the polished rod 31 far away from the steel wire ring 35; thereby fixing the polish rod 31 and facilitating the steel wire ring 35 to be sleeved outside the bolt 2.

Referring to fig. 2 and 3, a vertical steel wire 36 is arranged on the bead ring 35, a sliding hole 37 for the vertical steel wire 36 to extend out is arranged on the top wall of the base 3, a waist-shaped groove 38 for the vertical steel wire 36 to extend out is arranged on the side wall of the nut 4, one end of the vertical steel wire 36 extending out of the waist-shaped groove 38 is connected with a connecting hook 39, a convex block 300 for the connecting hook 39 to hook is arranged on the outer side of the nut 4, and the convex block 300 can be L-shaped; when the nut 4 is screwed on the base 3, the polish rod 31 moves upwards, the limit block 309 is moved out of the rectangular limit groove 308, meanwhile, the vertical steel wire 36 extends out of the sliding hole 37 and the waist-shaped groove 38, the vertical steel wire 36 is bent, the connecting hook 39 is hooked with the bump 300, the polish rod 31 is rotated again, the steel wire ring 35 is twisted and deformed, the vertical steel wire 36 is driven to be tightened, then the connecting hook 39 can be hooked with the bump 300, the polish rod 31 is moved again, the rectangular block 32 is inserted into the fixing groove 33, finally, the screw 34 is utilized to penetrate through the vertical rod 5 and is in threaded connection with the rectangular block 32, the vertical rod 5 and the polish rod 31 can be conveniently and quickly fixed, the nut 4 can be locked on the base 3, loosening of the nut 4 is facilitated to be reduced, the possibility of falling of a guardrail is caused, and safety of personnel.

Referring to fig. 4, the connecting member 8 includes an insertion block 80 disposed on the end wall of the cross rod 7, a slot 302 for inserting the insertion block 80 is disposed on the side wall of the polish rod 31, a through slot 301 for inserting the insertion block 80 is disposed on the outer side wall of the vertical rod 5, and both the through slot 301 and the slot 302 are disposed along the axial direction of the vertical rod 5.

Referring to fig. 4, positioning grooves 70 are formed in opposite side walls of the two cross bars 7, and positioning blocks 71 inserted into the positioning grooves 70 are formed in end walls of the vertical bars 9; after the polish rod 31 is fixed, the insert block 80 is firstly inserted into the slot 302 and the through slot 301, the positioning block 71 at one end of the vertical rod 9 is then inserted into the positioning slot 70, the insert block 80 on the other cross rod 7 is then inserted into the through slot 301 and the slot 302, and the positioning block 71 at the other end of the vertical rod 9 is simultaneously inserted into the positioning slot 70, so that the cross rod 7 and the vertical rod 9 can be conveniently and quickly installed; the insertion of the insert 80 into the slot 302 is beneficial to reduce the possibility of rotation of the polish rod 31.

Referring to fig. 5, at least two support rods 61 are arranged on one side of the cross beam 6 close to the indoor space, the support rods are hollow 61, two support rods 61 can be provided, a motor 62 is arranged in each support rod 61, a drive shaft 63 of the motor 62 is coaxially arranged, the drive shaft 63 faces one indoor side, a connecting rope 64 is arranged on each drive shaft 63, one end, far away from the drive shaft 63, of each connecting rope 64 penetrates through each support rod 61, one end, penetrating through each support rod 61, of each connecting rope 64 is provided with a hook ring 65, and a pot culture frame 66 is arranged between every two adjacent hook; because the potted plants are different in size, the rotating shaft 63 is driven to rotate by the motor 62, so that the connecting rope 64 can be wound on the supporting rod 61, the potted plant frame 66 can be driven to move up and down, the height of the potted plant frame 66 can be changed, and potted plants of different sizes can be placed on the potted plant frame 66; the indoor environment is greened through the pot culture, and the pot culture method is energy-saving and environment-friendly.

Referring to fig. 5 and 6, the base 3 is provided with a positioning notch 303, a moving groove 304 is provided on a groove wall of the positioning notch 303, and the moving groove 304 is disposed opposite to the vertical rod 5.

Referring to fig. 6, since potted plants are planted on the balcony 1, indoor animals are easily turned over; therefore, a hollow rod 67 is arranged between adjacent support rods 61, one side of the hollow rod 67 close to the base 3 is open, the hollow rod 67 is located on one side of the support rod 61 far away from the cross beam 6 and is arranged opposite to the cross beam 6, a scroll 68 is rotatably connected in the hollow rod 67, a coil spring 602 is arranged on the scroll 68, one end of the coil spring 602 is connected with the scroll 68, the other end of the coil spring is connected with the hollow rod 67, an insect-proof net 69 is wound on the outer side wall of the scroll 68, one end, far away from the scroll 68, of the insect-proof net 69 extends out of the hollow rod 67 and is provided with a fixing rod 600, an inserting plate 603 inserted into the positioning notch 303 is arranged on one side, far away from the insect-proof net 69, the inserting plate 603 and the fixing rod 600 are integrally formed and.

Referring to fig. 5 and 6, the fixed part 601 includes a spring 305 disposed on a bottom wall of the moving slot 304, a moving plate 306 sliding in the moving slot 304 is disposed at an end of the spring 305 away from the bottom wall of the moving slot 304, a handle 307 is disposed on the moving plate 306, an end of the moving plate 306 extending out of the moving slot 304 is abutted against a top wall of the board 603, and a length of the moving plate 306 is smaller than a length of the board 603; after placing potted plant on potted plant frame 66, pulling dead lever 600, pull open fly net 69, and drive spool 68 and rotate, expand coil spring 602 and hold power, remove movable plate 306, let out picture peg 603 male space, extrusion spring 305 holds power, insert picture peg 603 in location breach 303 again, loosen movable plate 306, movable plate 306 is contradicted fixedly with picture peg 603, thereby can fix fly net 69 by convenient and fast, and then can shelter from potted plant, be favorable to reducing the cat dog possibility of turning over potted plant at home, also can reduce the indoor possibility of mosquito entering.

The implementation principle of the energy-saving decorative guardrail convenient to install in the embodiment of the application is as follows: the base 3 is sleeved outside the base 3 and is in threaded connection with the nut 4, the cross rod 7 is installed by the connecting piece 8, the vertical rod 9 and the cross beam 6 are installed respectively, and therefore the guardrail can be installed and detached conveniently and quickly.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an energy-conserving decoration guardrail convenient to installation which characterized in that: including pre-buried a plurality of bolt (2) on balcony (1) and base (3) that supply bolt (2) to pass, the one end threaded connection that bolt (2) passed base (3) has nut (4), be equipped with pole setting (5) on base (3), it is adjacent be equipped with crossbeam (6) between pole setting (5), set up relatively between crossbeam (6) and base (3), it is adjacent just be equipped with two at least horizontal poles (7) below that is located crossbeam (6) between pole setting (5), it is adjacent be equipped with montant (9) between horizontal pole (7), horizontal pole (7) are connected with pole setting (5) through connecting piece (8).

2. The energy-saving decorative guardrail convenient to install of claim 1, wherein: a cavity (30) is arranged in the base (3);

a polish rod (31) is connected to the inside of the upright rod (5) in a sliding manner, a rectangular block (32) is arranged at one end, far away from the base (3), of the polish rod (31), a fixing groove (33) for the rectangular block (32) to be inserted is formed in the inner top wall of the upright rod (5), and a screw (34) which is screwed into the fixing groove (33) and is in threaded connection with the rectangular block (32) is arranged on the upright rod (5);

one end, far away from the rectangular block (32), of the polished rod (31) extends into the cavity (30), a steel wire ring (35) for a bolt (2) to penetrate through is arranged at one end, extending into the cavity (30), of the polished rod (31), a vertical steel wire (36) is arranged on the steel wire ring (35), and a sliding hole (37) for the vertical steel wire (36) to extend out is formed in the top wall of the base (3);

be equipped with waist type groove (38) that supply vertical steel wire (36) to stretch out on the lateral wall of nut (4), the one end that vertical steel wire (36) stretched out waist type groove (38) is equipped with connection and colludes (39), be equipped with on the lateral wall of nut (4) and supply connection collude (39) to collude lug (300) even.

3. The energy-saving decorative guardrail convenient to install of claim 2, wherein: connecting piece (8) are including setting up inserted block (80) on horizontal pole (7) end wall, be equipped with on the lateral wall of pole setting (5) and supply inserted block (80) male logical groove (301), establish slot (302) that set up with leading to groove (301) intercommunication on the lateral wall of polished rod (31).

4. The energy-saving decorative guardrail convenient to install of claim 1, wherein: the side wall of the cross rod (7) is provided with a positioning groove (70), and the end wall of the vertical rod (9) is provided with a positioning block (71) inserted into the positioning groove (70).

5. The energy-saving decorative guardrail convenient to install of claim 1, wherein: the utility model discloses a novel pot plant protection device, including crossbeam (6) and connecting rope (64), bracing piece (61) are equipped with two at least bracing pieces (61) on the just indoor one side of being close to of crossbeam (6), be equipped with motor (62) in bracing piece (61), the coaxial axis of rotation (63) that is equipped with of drive shaft of motor (62), be equipped with on axis of rotation (63) and connect rope (64), the one end of keeping away from axis of rotation (63) of connecting rope (64) passes bracing piece (61), the one end of connecting rope (64) and passing bracing piece (61) is equipped with and colludes ring (65), and is.

6. The energy-saving decorative guardrail convenient to install of claim 5, wherein: it is adjacent be equipped with hollow pole (67) between bracing piece (61), hollow pole (67) are located one side that crossbeam (6) were kept away from in bracing piece (61), hollow pole (67) internal rotation is connected with spool (68), around being equipped with fly net (69) on spool (68) lateral wall, the one end that spool (68) were kept away from in fly net (69) is equipped with dead lever (600), be equipped with mounting (601) that are used for fixing a position dead lever (600) on base (3).

7. The energy-saving decorative guardrail convenient to install of claim 6, wherein: and a coil spring (602) is arranged on the reel (68), one end of the coil spring (602) is connected with the reel (68), and the other end of the coil spring (602) is connected with the hollow rod (67).

8. The energy-saving decorative guardrail convenient to install of claim 6, wherein: a positioning gap (303) is formed in the base (3), a moving groove (304) is formed in the groove wall of the positioning gap (303), and an inserting plate (603) extending into the positioning gap (303) is arranged on one side, away from the insect-proof net (69), of the fixing rod (600);

the fixing piece (601) comprises a spring (305) arranged on the bottom wall of the moving groove (304), a moving plate (306) sliding in the moving groove (304) is arranged at one end, away from the bottom wall of the moving groove (304), of the spring (305), the moving plate (306) is abutted to the top wall of the plug board (603) at one end, extending out of the moving groove (304), of the moving plate (306), and the length of the moving plate (306) is smaller than that of the plug board (603).