CN112722398A

CN112722398A - Food packaging equipment of adjustable food package angle

Info

Publication number: CN112722398A
Application number: CN202110017929.5A
Authority: CN
Inventors: 覃业亮
Original assignee: Individual
Current assignee: Jinan Guoqiang Mechanical Equipment Co ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-04-30
Anticipated expiration: 2041-01-07
Also published as: CN112722398B

Abstract

The invention relates to the technical field of food packaging equipment, and discloses food packaging equipment capable of adjusting food packaging angles, which comprises a machine body, wherein a processing box is fixedly arranged at the bottom of the front surface of the machine body, a forming assembly is fixedly arranged on the surface of the front surface of the machine body, a moving block arranged on the inner wall of a side correction ring on one side of the machine body can move downwards due to the excessively high moving speed of the food packaging equipment, a bottom rod moves to enable a transverse rod to rotate on the inner wall of a circular groove through an arc-shaped block arranged on the back surface of the transverse rod, a collision rod arranged on one side close to the circle center of a central disc is enabled to be contacted with a rotating rod, the rotating rod is forced to rotate through a torsion spring, the rotating torsion spring enables the other torsion spring to rotate through a connecting belt, the transverse rod on the other side pulls a sliding block to slide downwards on the inner wall of a fitting block when moving, a magnetic block pulls, until the moving blocks arranged at the bottoms of the inner walls at the left side and the right side of the central disc are balanced.

Description

Food packaging equipment of adjustable food package angle

Technical Field

The invention relates to the technical field of food packaging equipment, in particular to food packaging equipment capable of adjusting a food packaging angle.

Technical Field

After food production finishes, need pack food to guarantee fresh degree, still convenient transportation and storage, food packaging machinery is most to be processed into small-size sealed bag with the packing belt, fixes it through processes such as cutting off and hot melt.

The following two defects are often existed in the processing process of the general food packaging machine:

1. in the folding process of the packaging tape, because the packaging tape is not stable enough, the packaging tape can slightly move after being shaped and replaced, the two ends of the moved packaging tape are different, and air leakage and infirm sealing can be caused during cutting and sealing treatment;

2. if the packaging belts are not aligned, the patterns on the surfaces of the packaging belts are also deviated, and if the packaging belts are always in a deviated state, the leaked holes become larger and larger, the work needs to be stopped, the packaging belts are reinstalled to correct the positions of the packaging belts, so that the time is wasted, and the installation is very troublesome.

Disclosure of Invention

In order to achieve the purpose of tidy packaging, the invention provides the following technical scheme: the utility model provides a food package equipment of adjustable food package angle, includes the fuselage, the positive bottom fixed mounting of fuselage has the processing case, the bottom fixed mounting of processing case has a flitch, the left side fixed mounting of fuselage has control panel, the positive fixed surface of fuselage installs the shaping subassembly.

As preferred, the shaping subassembly is including the mounting panel, the positive top fixed mounting of mounting panel has the type circle of deciding, the mounting panel openly just is located the below fixed mounting of type circle and corrects the ring, the bottom of mounting panel openly just is located the below fixed mounting of type circle and has hot frit, the bottom of mounting panel openly just is located the below fixed mounting of hot frit and has the locating wheel, and the surface of mounting panel is smooth, and easy to assemble equipment, the type circle plays preliminary location's effect.

Preferably, the inner wall of the correction ring is fixedly provided with a mounting block, a fixing rod is fixedly mounted on one side of the mounting block, which is close to the opposite side of the inner wall of the correction ring, the surface of the fixing rod is movably connected with a roller, side rods are fixedly mounted on the left side and the right side of the correction ring respectively, a spherical seat is fixedly mounted on the side of the side rod, which is far away from the circle center of the correction ring, a supporting rod is fixedly mounted at the bottom end of the spherical seat, an auxiliary rod is fixedly mounted on the surface of the supporting rod, fitting blocks are fixedly mounted on the left side and the right side of the inner wall of the bottom of the correction ring respectively, a central disc is fixedly mounted on one side of the fitting blocks, which is close to the vertical center line of the.

Preferably, guide plates are fixedly mounted on the left side and the right side of the inner wall of the attaching block, an extending belt is fixedly mounted at the bottom end of each guide plate, a magnetic block is fixedly mounted at the bottom end of each extending belt, a fixed plate is fixedly mounted on one side, away from the vertical center line of the attaching block, of each magnetic block, a sliding block is fixedly mounted on one side, away from the vertical center line of the attaching block, of each fixed plate, a connecting rod is fixedly mounted at the bottom end of each sliding block, compression pads are fixedly mounted on the left side and the right side of the bottom of the inner wall of the attaching block, moving blocks are fixedly mounted at the top ends of the compression pads, bottom rods are fixedly mounted on the surfaces of the bottom.

As preferred, the circular slot has been seted up to the positive inner wall of center pan, the inner wall swing joint of circular slot has the arc piece, the positive fixed mounting of arc piece has the transverse bar, the inner wall fixed mounting of transverse bar has the runner, one side fixed mounting that the transverse bar is close to the center of a circle of center pan has the collision pole, one side swing joint that the horizontal central line of center pan was kept away from to the collision pole has the bull stick, one side fixed mounting that the bull stick is close to the vertical central line of center pan has the torsional spring, the fixed surface of torsional spring bottom has the connecting band, and the circular slot is fixed with the arc piece looks adaptation, and can effectually fix the arc piece, and can not obstruct the arc piece and slide in its.

Preferably, the quantity of torsional spring and affiliated structure is two, and for the installation of relative reverse, the top and the bottom of connecting band are fixed with the torsional spring respectively, the back of torsional spring and the fixed surface of central disk, two torsional springs correspond two connecting rods, and convenient simultaneous movement plays the effect of linkage.

Preferably, the left side and the right side of the central disc are provided with connecting columns which are fixed with the attaching blocks, the number of the attaching blocks and the number of the attached structures of the attaching blocks are two, the sizes and the shapes of the attaching blocks are equal, the connecting columns arranged on the left side and the right side of the central disc play a role in fixing, and the central disc is prevented from shaking after being stressed.

Preferably, the bottom end of the bottom rod is fixedly connected with the transverse rod, a groove matched with the compression pad is formed in the joint of the moving block and the compression pad, and the bottom rod, the bottom end of which is fixedly connected with the transverse rod, can drive the whole transverse rod to move after the moving block is stressed to move.

Preferably, the fixed plate is close to one side of magnetic path and installs telescopic link and bullet pole, the quantity of magnetic path is two and the junction installs the rubber pad, and the telescopic link of fixed plate surface mounting plays the effect of convenient removal, can be suitable for different types of packing area, and the bullet pole plays the effect of auxiliary stay, prevents that the telescopic link from lasting the shrink.

The invention has the beneficial effects that: a food packaging device capable of adjusting food packaging angles is characterized in that moving blocks arranged on the left side and the right side of the inner wall of a central disc are kept balanced through a compression pad, so that a packaging belt passing through a correction ring is always in an aligned state and is convenient to process, after the packaging belt enters the inner wall of the correction ring, the moving blocks arranged on the inner wall of a side correction ring on one more side can move downwards due to the excessively high moving speed of the packaging belt, a bottom rod can move downwards, the bottom rod moves to enable a transverse rod to rotate on the inner wall of a circular groove through an arc-shaped block arranged on the back surface of the transverse rod, a collision rod arranged on one side close to the circle center of the central disc is contacted with a rotating rod, the rotating rod is stressed to rotate through a torsional spring, the rotating torsional spring is connected to enable another torsional spring to rotate, after the other torsional spring drives the other side of the central disc and an accessory structure of the central disc to move, the slider moves to enable the fixed plate and the magnetic block to move, the magnetic block pulls the packaging belt fixed on the inner wall to one side of the defect until the moving blocks mounted at the bottoms of the inner walls on the left side and the right side of the central disc are balanced, and at the moment, the packaging belts on the two sides are in a flat state.

Drawings

FIG. 1 is an overall front view of the present invention;

FIG. 2 is a schematic view of a molding assembly of the present invention;

FIG. 3 is a top sectional view of the attachment block structure of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 3 according to the present invention;

FIG. 6 is an enlarged view of the structure at C of FIG. 3 according to the present invention;

fig. 7 is an enlarged view of the structure of the central disk in the present invention.

In the figure: 1. a body; 2. a processing box; 3. a discharge plate; 4. a control panel; 5. a molding assembly; 51. mounting a plate; 52. fixing a ring; 53. a correction ring; 531. mounting blocks; 532. fixing the rod; 533. a roller; 534. a side lever; 535. a spherical seat; 536. a support bar; 537. an auxiliary lever; 538. fitting blocks; 5381. a guide plate; 5382. an extension band; 5383. a magnetic block; 5384. a fixing plate; 5385. a slider; 5386. a connecting rod; 5387. a compression pad; 5388. a moving block; 5389. a bottom bar; 539. a central disk; 5391. a circular groove; 5392. an arc-shaped block; 5393. a transverse bar; 5394. a rotating wheel; 5395. a collision bar; 5396. a rotating rod; 5397. a torsion spring; 5398. a connecting belt; 54. a hot melt block; 55. and (5) positioning the wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the protection scope of the present invention.

Referring to fig. 1, the food packaging equipment capable of adjusting the food packaging angle comprises a machine body 1, wherein a processing box 2 is fixedly installed at the bottom of the front surface of the machine body 1, a discharging plate 3 is fixedly installed at the bottom end of the processing box 2, a control panel 4 is fixedly installed at the left side of the machine body 1, and a forming assembly 5 is fixedly installed on the surface of the front surface of the machine body 1;

the processing tank 2 installed according to fig. 1 is used in conjunction with a forming assembly 5 for cutting the sealed food product and subsequently discharging it through the discharge plate 3.

Referring to fig. 2, the molding assembly 5 includes a mounting plate 51, a fixed ring 52 is fixedly mounted on the top of the front surface of the mounting plate 51, a correction ring 53 is fixedly mounted on the front surface of the mounting plate 51 and below the fixed ring 52, a hot melt block 54 is fixedly mounted on the front surface of the bottom of the mounting plate 51 and below the hot melt block 54, a positioning wheel 55 is fixedly mounted on the front surface of the bottom of the mounting plate 51 and below the hot melt block 54, the surface of the mounting plate 51 is smooth, the installation of the apparatus is facilitated, and the fixed ring 52 plays a role in preliminary positioning;

the fixing ring 52 allows the packaging tape to be quickly fixed by means of the guide of the positioning wheel 55 mounted in fig. 2, which prevents the sealed packaging tape from deviating from the path of its own movement.

Referring to fig. 3 and 6, an installation block 531 is fixedly installed on the inner wall of the correction ring 53, a fixed rod 532 is fixedly installed on one side of the installation block 531, which is close to the opposite side of the inner wall of the correction ring 53, a roller 533 is movably connected to the surface of the fixed rod 532, side rods 534 are fixedly installed on the left and right sides of the correction ring 53, a spherical seat 535 is fixedly installed on the surface of one side of the side rod 534, which is far away from the center of the correction ring 53, a support rod 536 is fixedly installed at the bottom end of the spherical seat 535, an auxiliary rod 537 is fixedly installed on the surface of the support rod 536, fitting blocks 538 are fixedly installed on the left and right sides of the inner wall of the bottom of the correction ring 53, a center plate 539 is fixedly installed on one side of the fitting block 538, the installation block 531 can make the;

the auxiliary rod 537 in fig. 3 supports the support rod 536 to make the support rod 536 more firmly fixed to the mounting plate 51.

Referring to fig. 4 and 5, guide plates 5381 are fixedly mounted on the left and right sides of the inner wall of the fitting block 538, an extension band 5382 is fixedly mounted at the bottom end of the guide plates 5381, a magnetic block 5383 is fixedly mounted at the bottom end of the extension band 5382, a fixed plate 5384 is fixedly mounted on one side of the magnetic block 5383 away from the vertical center line of the fitting block 538, a sliding block 5385 is fixedly mounted on one side of the fixed plate 5384 away from the vertical center line of the fitting block 538, a connecting rod 5386 is fixedly mounted at the bottom end of the sliding block 5385, compression pads 5387 are fixedly mounted on the left and right sides of the bottom of the inner wall of the fitting block 538, a moving block 5388 is fixedly mounted at the top end of the compression pad 5387, a bottom rod 5389 is fixedly mounted on the bottom end surface;

according to the guide rod installed in fig. 4, the packaging tape sliding on the inner wall of the attaching block 538 can be fixed by matching with the extension tape 5382 so as to prevent the packaging tape from being stuck, and the packaging tape moving on the inner wall of the magnetic block 5383 is more stable.

Referring to fig. 7, a circular groove 5391 is formed in an inner wall of a front side of a center plate 539, an arc-shaped block 5392 is movably connected to the inner wall of the circular groove 5391, a transverse rod 5393 is fixedly mounted on the front side of the arc-shaped block 5392, a rotating wheel 5394 is fixedly mounted on the inner wall of the transverse rod 5393, an impact rod 5395 is fixedly mounted on one side of the transverse rod 5393, which is close to a circle center of the center plate 539, a rotating rod 5396 is movably connected to one side of the impact rod 5395, which is far away from a horizontal center line of the center plate 539, a torsion spring 5397 is fixedly mounted on one side of the rotating rod 5396, which is close to a vertical center line of the center plate 539, a connecting band 8 is fixedly mounted on a surface of a bottom end of the torsion spring 5397, the circular groove;

the turning wheel 5394 according to figure 7 prevents the transverse rod 5393 from moving when the transverse rod 5393 is turned, and the force of the spring 5397 rebounds to return the connecting rod 5386, which is forced to move, to its original position.

Referring to fig. 7, the number of the torsion springs 5397 and the attached structures thereof is two, and the torsion springs are oppositely and reversely mounted, the top end and the bottom end of the connecting band 5398 are respectively fixed to the torsion springs 5397, the back of the torsion springs 5397 is fixed to the surface of the central disc 539, and the two torsion springs 5397 correspond to the two connecting rods 5386, so that the two torsion springs are convenient to move simultaneously, and play a role in linkage;

according to the connecting band 5398 installed in fig. 7, after one torsion spring 5397 rotates, the other torsion spring 5397 rotates, so that the transverse rod 5393 on the other side drives the packing band to move, the purpose that the packing band is parallel is achieved, and the torsion spring 5397 fixed to the central disc 539 is installed more firmly.

Referring to fig. 7, the connecting columns are mounted on the left side and the right side of the central disk 539 and fixed to the attachment blocks 538, the number of the attachment blocks 538 and the number of the attachment structures thereof are two, the sizes and the shapes of the attachment blocks are equal, and the connecting columns mounted on the left side and the right side of the central disk 539 play a role in fixing to prevent the central disk 539 from shaking after being stressed;

according to the two fitting blocks 538 with the same shape and size in the figure 7, when the packing tape is fastened by the two fitting blocks 538, no gap is tightly fitted between the two fitting blocks 538, and sealing is convenient.

Referring to fig. 5 and 7, the bottom end of the bottom rod 5389 is fixedly connected to the transverse rod 5393, a groove adapted to the compression pad 5387 is formed at a connection between the moving block 5388 and the compression pad 5387, and the bottom rod 5389, the bottom end of which is fixedly connected to the transverse rod 5393, can drive the entire transverse rod 5393 to move after the moving block 5388 is forced to move;

the compression pad 5387 can be conveniently fixed according to the groove formed in the moving block 5388 in fig. 5, the compression pad 5387 is prevented from deviating after being compressed, and then the bottom rod 5389 is driven to rotate in cooperation with the transverse rod 5393 installed in fig. 7.

Referring to fig. 4, a telescopic rod and an elastic rod are mounted on one side of the fixing plate 5384 close to the magnetic blocks 5383, the number of the magnetic blocks 5383 is two, rubber pads are mounted at joints, the telescopic rod mounted on the surface of the fixing plate 5384 has the function of convenient movement and can be suitable for different types of packaging belts, and the elastic rod has the function of auxiliary support and prevents the telescopic rod from continuously contracting;

according to the rubber pad arranged at the connecting part of the opposite sides of the two magnetic blocks 5383 in the figure 4, the magnetic blocks 5383 can be effectively prevented from being damaged due to direct collision of the two magnetic blocks 5383, and the service life of the magnetic blocks 5383 is effectively prolonged.

The working principle is as follows: a food packaging device capable of adjusting food packaging angles is mainly applied to the technical field of food packaging devices, the working principle of the food packaging device is that the whole device is started through a control panel 4, a packaging table enters a hot melt 54 through a fixed ring 52 and a correction ring 53, the hot melt 54 is sealed and then is cut off through a processing box 2 and then is discharged from a discharge plate 3, because the fixed ring 52 is only preliminarily shaped, the packaging belts on two sides are misaligned due to self rebounding and dragging force during moving, then enter the correction ring 53, the side with more packaging belts is provided, due to the fact that the moving speed of the packaging belts is too high, a moving block 5388 mounted on the inner wall of the correction ring 53 on the side can move downwards, the moving block 5388 descends to extrude a compression pad 5387, a bottom rod 5389 moves downwards, the bottom rod 5389 moves to enable a transverse rod 5393 to rotate on the inner wall of a circular groove 5391 through an arc-shaped block 5392 mounted on the back of the transverse rod 5393, and a rotary rod 5395 mounted on one side close to the circle center of a center plate 539 by the rotary rod The rotating rod 5396 is stressed to rotate through the torsion spring 5397, the rotating torsion spring 5397 drives another torsion spring 5397 to rotate through the connecting band 5398, after another torsion spring 5397 drives the other side of the central disc 539 and its affiliated structures to move, lead to the cross bar 5393 of the other side to move downward, the cross bar 5393 moved downward draws the slide block 5385 to slide downward in the inner wall of the laminating block 538 through the connecting rod 5386 while moving, the slide block 5385 moves and makes the fixed plate 5384 and the magnet 5383 move, the magnet 5383 draws the wrapping tape fixed to the inner wall to draw to one side of the defect, until the moving blocks 5388 mounted at the bottom of the inner wall of the left and right sides of the central disc 539 are balanced, the wrapping tape of both sides is in the flat state.

In conclusion, the food packaging equipment capable of adjusting the food packaging angle drives the moving blocks 5388 arranged on the left side and the right side of the inner wall of the central disc 539 to be balanced through the compression pads 5387, so that the packaging belts of the correction ring 53 are always in an aligned state, and therefore the processing is convenient, after the packaging belts enter the inner wall of the correction ring 53, the moving blocks 5388 arranged on the inner wall of the more side correction ring 53 move downwards due to the excessively high moving speed of the packaging belts, the bottom rods 5389 move downwards, the bottom rods 5389 move to enable the transverse rods 5393 to rotate on the inner wall of the circular groove 5391 through the arc-shaped blocks 5392 arranged on the back surfaces of the transverse rods 5393, the collision rods 5395 arranged on one side close to the center of the central disc touch the rotating rods 5396, the rotating rods 5396 are stressed to rotate through the torsion springs 5397, the rotating torsion springs 5397 drive the other torsion springs 5397 to rotate through the connecting belts 5398, and the other torsion springs, when the transverse rod 5393 on the other side moves, the connecting rod 5386 pulls the sliding block 5385 to slide downwards on the inner wall of the attaching block 538, the sliding block 5385 moves to enable the fixing plate 5384 and the magnetic block 5383 to move, the magnetic block 5383 pulls the packaging tape fixed on the inner wall to pull towards the defective side until the moving blocks 5388 mounted at the bottoms of the inner walls on the left side and the right side of the central disk 539 are balanced, and at the moment, the packaging tapes on the two sides are in a flat state.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a food package equipment of adjustable food package angle, includes fuselage (1), its characterized in that: the utility model discloses a processing box, including fuselage (1), fixed mounting has processing case (2) in the front bottom of fuselage (1), the bottom fixed mounting of processing case (2) has ejection of compact board (3), the left side fixed mounting of fuselage (1) has control panel (4), the front fixed surface of fuselage (1) installs forming assembly (5).

2. The food packaging apparatus capable of adjusting the angle of food packaging according to claim 1, wherein: the molding assembly (5) is including mounting panel (51), the positive top fixed mounting of mounting panel (51) has set ring (52), mounting panel (51) is positive and be located the below fixed mounting of set ring (52) and rectify ring (53), the bottom of mounting panel (51) is positive and be located the below fixed mounting of set ring (52) and have hot frit (54), the bottom of mounting panel (51) is positive and be located the below fixed mounting of hot frit (54) and have locating wheel (55).

3. The food packaging apparatus capable of adjusting the angle of food packaging according to claim 2, wherein: the inner wall fixed mounting who corrects ring (53) has installation piece (531), relative one side fixed mounting that installation piece (531) is close to and corrects ring (53) inner wall has dead lever (532), the surperficial swing joint of dead lever (532) has gyro wheel (533), the equal fixed mounting in left and right sides of correcting ring (53) has side lever (534), the surface fixed mounting who keeps away from and corrects ring (53) centre of a circle one side of side lever (534) has spherical seat (535), the bottom fixed mounting of spherical seat (535) has bracing piece (536), the surface fixed mounting of bracing piece (536) has auxiliary rod (537), the equal fixed mounting in left and right sides of correcting ring (53) bottom inner wall has laminating piece (538), one side fixed mounting that laminating piece (538) is close to and corrects ring (53) vertical center line has central disk (539).

4. The food packaging apparatus capable of adjusting the angle of food packaging according to claim 3, wherein: the left side and the right side of the inner wall of the attaching block (538) are fixedly provided with guide plates (5381), the bottom end of each guide plate (5381) is fixedly provided with an extending belt (5382), the bottom end of each extending belt (5382) is fixedly provided with a magnetic block (5383), one side, far away from the vertical central line of the attaching block (538), of each magnetic block (5383) is fixedly provided with a fixing plate (5384), one side, far away from the vertical central line of the attaching block (538), of each fixing plate (5384) is fixedly provided with a sliding block (5385), the bottom end of each sliding block (5385) is fixedly provided with a connecting rod (5386), the left side and the right side of the bottom of the inner wall of the attaching block (538) are fixedly provided with compression pads (5387), the top end of each compression pad (5387) is fixedly provided with a moving block (5388), and the.

5. The food packaging apparatus capable of adjusting the angle of food packaging according to claim 4, wherein: circular slot (5391) have been seted up to the front inner wall of center pan (539), the inner wall swing joint of circular slot (5391) has arc piece (5392), the front fixed mounting of arc piece (5392) has transverse bar (5393), the inner wall fixed mounting of transverse bar (5393) has runner (5394), one side fixed mounting that transverse bar (5393) are close to center pan (539) centre of a circle has collision bar (5395), one side swing joint that center pan (539) horizontal center line was kept away from in collision bar (5395) has runner (5396), one side fixed mounting that runner (5396) are close to center pan (539) vertical center line has torsional spring (5397), the fixed surface mounting of torsional spring (5397) bottom has connecting band (5398).

6. The food packaging apparatus capable of adjusting the angle of food packaging according to claim 5, wherein: the number of the torsion springs (5397) and the auxiliary structures thereof is two, the torsion springs are oppositely and reversely mounted, the top end and the bottom end of the connecting band (5398) are respectively fixed with the torsion springs (5397), and the back surfaces of the torsion springs (5397) are fixed with the surface of the central disc (539).

7. The food packaging apparatus capable of adjusting the angle of food packaging according to claim 3, wherein: the left side and the right side of the central disc (539) are provided with connecting columns and are fixed with the attaching blocks (538), and the number of the attaching blocks (538) and the number of the accessory structures thereof are two and are equal in size and shape.

8. The food packaging apparatus capable of adjusting the angle of food packaging according to claim 5, wherein: the bottom end of the bottom rod (5389) is fixedly connected with the transverse rod (5393), and a groove matched with the compression pad (5387) is formed in the joint of the moving block (5388) and the compression pad (5387).

9. The food packaging apparatus capable of adjusting the angle of food packaging according to claim 4, wherein: one side of the fixing plate (5384) close to the magnetic blocks (5383) is provided with a telescopic rod and an elastic rod, the number of the magnetic blocks (5383) is two, and the joints of the two magnetic blocks are provided with rubber pads.