阅读说明：本技术 一种用于简单平面框架焊点打磨设备 (Be used for simple plane frame solder joint equipment of polishing ) 是由 陈日招 于 2021-08-04 设计创作，主要内容包括：本发明涉及一种打磨设备,尤其涉及一种用于简单平面框架焊点打磨设备。要解决的技术问题是：提供一种能够实现自动打磨修整,速度快,效率较高,防止打磨过程中木屑四散,并且避免危险事故发生的用于简单平面框架焊点打磨设备。本发明的技术方案为：一种用于简单平面框架焊点打磨设备,包括有底座,其设有3个底座；安装板,底座顶部之间设有安装板；打磨机构,安装板一侧设有打磨机构；推进机构,安装板和打磨机构之间连接有推进机构。通过清理机构的作用,能够保持打磨过程中安装板上的干净整洁,通过推料机构的作用,即可对物料进行自动上料操作。(The invention relates to polishing equipment, in particular to polishing equipment for welding points of a simple plane frame. The technical problem to be solved is as follows: the utility model provides a can realize the automatic maintenance of polishing, fast, efficiency is higher, prevents to polish in-process saw-dust scattered to avoid being used for simple plane frame solder joint equipment of polishing of dangerous occurence of failure. The technical scheme of the invention is as follows: a polishing device for welding spots of a simple plane frame comprises a base, wherein 3 bases are arranged on the base; the mounting plate is arranged between the tops of the bases; one side of the mounting plate is provided with a polishing mechanism; and the propelling mechanism is connected between the mounting plate and the polishing mechanism. Through the effect of clearance mechanism, can keep polishing the clean and tidy on the in-process mounting panel, through pushing equipment's effect, can carry out automatic feeding operation to the material.)

1. The utility model provides an equipment of polishing for simple plane frame solder joint which characterized in that, including:

a base (1) provided with 3 bases (1);

the mounting plate (2) is arranged between the tops of the base (1);

the polishing mechanism (3) is arranged on one side of the mounting plate (2);

the propelling mechanism (4) is connected between the mounting plate (2) and the polishing mechanism (3).

2. A device for simple flat frame weld point grinding according to claim 1, characterized in that the grinding means (3) comprises:

a first slide rail (31), wherein one side of the mounting plate (2) is provided with the first slide rail (31);

the first bracket (30) is arranged on one side of the mounting plate (2);

the first round rod (33) is connected between the first bracket (30) and the first sliding rail (31) in a sliding manner;

a first spring (32), wherein the first spring (32) is connected between one side of the first round rod (33) and the first slide rail (31);

a telescopic spring is connected between one side of the first round rod (33) and the first support (30), and the first round rod (33) is connected with a first wedge block (34);

the bottom of the first wedge-shaped block (34) is provided with a first sleeve (35);

a second bracket (36), wherein the second bracket (36) is arranged on one side of the mounting plate (2);

the screw rod sleeves (37), and 4 screw rod sleeves (37) are arranged on the second bracket (36);

the bottom of the first sleeve (35) is rotatably connected with 4 screw shafts (38), and the screw shafts (38) are in threaded connection with screw sleeves (37);

the bottom of the grinding disc (39) and the bottom of the screw shaft (38) are both connected with the grinding disc (39).

3. A device for simple flat frame spot weld grinding according to claim 2, characterized in that the pushing means (4) comprise:

a third bracket (40), wherein the third bracket (40) is arranged on one side of the mounting plate (2);

the air cylinder (41) is arranged on the third support (40);

the bottom of one side of the mounting plate (2) is provided with a second sliding rail (45);

the telescopic plate (46) is connected with the second slide rail (45) in a sliding way;

the special-shaped rod (42) is arranged on the telescopic plate (46);

a second round rod (43), wherein one side of the special-shaped rod (42) is provided with the second round rod (43);

a third round bar (44), and one side of the special-shaped bar (42) is provided with the third round bar (44).

4. The simple planar frame weld point grinding device according to claim 3, further comprising a limiting mechanism (5), wherein the limiting mechanism (5) comprises:

the first guide plate (50) is arranged on one side of the mounting plate (2);

a bearing seat (51) is arranged on one side of the bottom of the mounting plate (2);

the first rotating shaft (52) is rotatably connected between the first guide plate (50) and the bearing seat (51);

a gear (53), wherein the gear (53) is arranged on one side of the first rotating shaft (52);

a first fixing plate (55), wherein one side of the first rotating shaft (52) is provided with the first fixing plate (55);

the first guide plate (50) is connected with a rack (54) in a sliding mode, and the rack (54) is meshed with the gear (53).

5. The equipment for grinding the welding points of the simple plane frame as claimed in claim 4, further comprising a material pushing mechanism (6), wherein the material pushing mechanism (6) comprises:

one side of the mounting plate (2) is connected with the push-pull rod (62) in a sliding manner;

a second fixing plate (60), wherein one end of the push-pull rod (62) is provided with the second fixing plate (60);

and a second spring (61), wherein the second spring (61) is connected between the second fixing plate (60) and the mounting plate (2).

6. The simple flat frame weld point grinding device according to claim 5, further comprising a discharging mechanism (7), wherein the discharging mechanism (7) comprises:

a second guide plate (70), wherein one side of the bottom of the mounting plate (2) is provided with the second guide plate (70);

the third sleeve (72) is connected to the second guide plate (70) in a sliding mode;

a third spring (71), wherein the third spring (71) is connected between the third sleeve (72) and the second guide plate (70);

a third wedge block (75), wherein one side of the third sleeve (72) is provided with the third wedge block (75);

the second wedge block (74) is connected to the third sleeve (72) in a sliding mode;

the fourth spring (73) is connected between the third sleeve (72) and the second wedge block (74);

a second rotating shaft (76), wherein one side of the bottom of the mounting plate (2) is rotatably connected with the second rotating shaft (76);

a torsion spring (77), wherein the torsion spring (77) is connected between the second rotating shaft (76) and the mounting plate (2);

a fourth round rod (78), wherein one side of the second rotating shaft (76) is connected with the fourth round rod (78) in a sliding manner;

a fourth wedge block (79), wherein the fourth wedge block (79) is arranged on one side of the fourth round rod (78);

and a fifth spring (710) is connected between the fourth wedge block (79) and the second rotating shaft (76).

7. The simple flat frame weld point grinding apparatus according to claim 6, further comprising a cleaning mechanism (8), wherein the cleaning mechanism (8) comprises:

the mounting seat (80) is arranged on one side of the mounting plate (2);

the mounting base (80) is provided with a connecting shaft (81);

the fan blades (82) are rotatably connected to one side of the connecting shaft (81).

8. A simple flat frame weld grinding apparatus as claimed in claim 6, wherein the third sleeve (72) is cuboid in shape.

Technical Field

The invention relates to polishing equipment, in particular to polishing equipment for welding points of a simple plane frame.

Background

In life, people can make the plane frame into small articles such as a photo frame and the like, so that the plane frame plays a great supporting role in human life, and people can use the plane frame in different ways according to different properties and characteristics of wood. The plane frame can be polished and trimmed before use, so that four corners of the plane frame are uniform and smooth, but the plane frame is trimmed a lot or manually, the speed is low, the efficiency is low, and sawdust is scattered in the trimming process.

Therefore, the grinding equipment for the welding spots of the simple plane frame, which can realize automatic grinding and finishing, is high in speed and efficiency, prevents wood dust from scattering in the grinding process and avoids dangerous accidents, is developed.

Disclosure of Invention

In order to overcome the defects of low speed, low efficiency and scattered sawdust in the trimming process, the technical problems to be solved are as follows: the utility model provides a can realize the automatic maintenance of polishing, fast, efficiency is higher, prevents to polish in-process saw-dust scattered to avoid being used for simple plane frame solder joint equipment of polishing of dangerous occurence of failure.

The technical scheme of the invention is as follows: a be used for simple plane frame solder joint equipment of polishing, including:

a base provided with 3 bases;

the mounting plate is arranged between the tops of the bases;

one side of the mounting plate is provided with a polishing mechanism;

and the propelling mechanism is connected between the mounting plate and the polishing mechanism.

As a further preferable mode, the grinding mechanism includes:

the first sliding rail is arranged on one side of the mounting plate;

the first bracket is arranged on one side of the mounting plate;

the first round rod is connected between the first bracket and the first sliding rail in a sliding manner;

the first spring is connected between one side of the first round rod and the first sliding rail;

a telescopic spring is connected between one side of the first round rod and the first support, and the first round rod is connected with a first wedge block;

the bottom of the first wedge-shaped block is provided with a first sleeve;

one side of the mounting plate is provided with a second bracket;

the second bracket is provided with 4 screw rod sleeves;

the bottom of the first sleeve is rotatably connected with 4 screw shafts, and the screw shafts are all in threaded connection with screw sleeves;

the bottom of the screw rod shaft is connected with a grinding disc.

As a further preferable mode, the propulsion mechanism includes:

one side of the mounting plate is provided with a third bracket;

the third support is provided with a cylinder;

the bottom of one side of the mounting plate is provided with a second sliding rail;

the second sliding rail is connected with the telescopic plate in a sliding manner;

the telescopic plate is provided with a special-shaped rod;

a second round bar, one side of the special-shaped bar is provided with the second round bar;

and a third round rod is arranged on one side of the special-shaped rod.

As a further preferable scheme, the device further comprises a limiting mechanism, wherein the limiting mechanism comprises:

one side of the mounting plate is provided with a first guide plate;

the bearing seat is arranged on one side of the bottom of the mounting plate;

the first rotating shaft is rotatably connected between the first guide plate and the bearing seat;

one side of the first rotating shaft is provided with a gear;

a first fixing plate is arranged on one side of the first rotating shaft;

the rack is connected with the first guide plate in a sliding mode and meshed with the gear.

As a further preferable scheme, the device further comprises a material pushing mechanism, wherein the material pushing mechanism comprises:

one side of the mounting plate is connected with the push-pull rod in a sliding manner;

a second fixing plate is arranged at one end of the push-pull rod;

and a second spring is connected between the second fixing plate and the mounting plate.

As a further preferable scheme, the device further comprises a discharging mechanism, wherein the discharging mechanism comprises:

one side of the bottom of the mounting plate is provided with a second guide plate;

the second guide plate is connected with a second sleeve in a sliding manner;

a third spring is connected between the third sleeve and the second guide plate;

one side of the third sleeve is provided with a third wedge block;

the third sleeve is connected with a second wedge block in a sliding manner;

a fourth spring is connected between the third sleeve and the second wedge-shaped block;

one side of the bottom of the mounting plate is rotatably connected with the second rotating shaft;

the torsional spring is connected between the second rotating shaft and the mounting plate;

one side of the second rotating shaft is connected with a fourth round rod in a sliding manner;

one side of the fourth round rod is provided with a fourth wedge-shaped block;

and a fifth spring is connected between the fourth wedge block and the second rotating shaft.

As a further preferable scheme, the device further comprises a cleaning mechanism, and the cleaning mechanism comprises:

the mounting seat is arranged on one side of the mounting plate;

the mounting base is provided with a connecting shaft;

fan blades are rotatably connected to one side of the connecting shaft.

As a further preferable mode, the third sleeve shape is a rectangular parallelepiped.

Compared with the prior art, the invention has the following advantages: the cleaning mechanism can keep the mounting plate clean and tidy in the polishing process, and the material can be automatically fed under the action of the pushing mechanism; the material can be limited by the limiting mechanism, so that the material is prevented from displacing in the polishing process; through advancing mechanism's effect, can realize polishing the material automatically, can save artifical time of polishing, improve the efficiency of polishing.

Drawings

Fig. 1 is a schematic front view of the present invention.

FIG. 2 is a schematic view of a first partial body structure according to the present invention.

FIG. 3 is a schematic view of a second partial body structure according to the present invention.

Fig. 4 is a perspective view of a third embodiment of the present invention.

Fig. 5 is a perspective view of a fourth embodiment of the present invention.

FIG. 6 is a schematic view of a fifth partial body structure according to the present invention.

FIG. 7 is a schematic view of a sixth partial body structure according to the present invention.

FIG. 8 is a schematic view of a seventh partial body structure according to the present invention.

Wherein: 1. the grinding mechanism comprises a base, a mounting plate, a grinding mechanism 30, a first support, a first sliding rail 31, a first sliding rail 32, a first spring 33, a first round rod 34, a first wedge block 35, a first sleeve 36, a second support 37, a screw rod sleeve 38, a screw rod shaft 39, a grinding disc 4, a propelling mechanism 40, a third support 41, a cylinder 42, a special-shaped rod 43, a second round rod 44, a third round rod 45, a second sliding rail 46, a telescopic plate 5, a limiting mechanism 50, a first guide plate 51, a bearing seat 52, a first rotating shaft 53, a gear 54, a rack 55, a first fixing plate 6, a pushing mechanism 60, a second fixing plate 61, a second spring 62, a push-pull rod 7, a discharging mechanism 70, a second guide plate 71, a third spring 72, a third sleeve 73, a fourth spring 74, a second wedge block 75, a third sleeve 73, a fourth spring, a second wedge block 75, a second wedge block 75, The fan blade comprises a third wedge block 76, a second rotating shaft 77, a torsion spring 78, a fourth round rod 79, a fourth wedge block 710, a fifth spring 8, a cleaning mechanism 80, a mounting seat 81, a connecting shaft 82 and fan blades.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The utility model provides an equipment of polishing for simple plane frame solder joint, as shown in figure 1, including base 1, mounting panel 2, grinding machanism 3 and advancing mechanism 4, it is equipped with 3 bases 1, is equipped with mounting panel 2 between the base 1 top, and 2 left parts of mounting panel are equipped with grinding machanism 3, are connected with advancing mechanism 4 between mounting panel 2 and the grinding machanism 3.

When people need polish the material, place the material on mounting panel 2, people start advancing mechanism 4 afterwards, and advancing mechanism 4 drives the motion of grinding machanism 3 for grinding machanism 3 polishes the operation to the material, and people close advancing mechanism 4 after polishing, and grinding machanism 3 stop motion, people can take out the material.

Example 2

On the basis of embodiment 1, as shown in fig. 2 to 8, the grinding mechanism 3 includes a first bracket 30, a first slide rail 31, a first spring 32, a first round bar 33, a first wedge block 34, a first sleeve 35, a second bracket 36, a screw sleeve 37, a screw shaft 38 and a grinding disc 39, the first slide rail 31 is disposed at the left portion of the mounting plate 2, the first bracket 30 is disposed at the middle portion of the mounting plate 2, the first round bar 33 is slidably connected between the first bracket 30 and the first slide rail 31, the first spring 32 is connected between the left portion of the first round bar 33 and the first slide rail 31, the extension spring is connected between the right portion of the first round bar 33 and the first bracket 30, the first wedge block 34 is connected to the first round bar 33, the first sleeve 35 is disposed at the bottom of the first wedge block 34, the second bracket 36 is disposed at the left portion of the mounting plate 2, the 4 screw sleeves 37 are rotatably disposed on the second bracket 36, the bottom of the first sleeve 35 is connected to 4 screw shafts 38, the screw shaft 38 is connected with the screw sleeve 37 in a threaded manner, and the bottom of the screw shaft 38 is connected with a grinding disc 39.

When people need to polish materials, the materials are placed on the mounting plate 2, then the people manually press the first wedge-shaped block 34 downwards, the first wedge-shaped block 34 drives the first round rod 33, the first sleeve 35, the screw rod shaft 38 and the sanding disc 39 to move downwards, the first spring 32 and the telescopic spring contract and move, in the process of moving the screw shaft 38 and the sanding disc 39 downwards, the screw sleeve 37 drives the screw shaft 38 and the sanding disc 39 to rotate, when the grinding disc 39 is in contact with the material, the grinding disc 39 grinds the material, and after the grinding is finished, the first wedge block 34 is released, the first spring 32 and the telescopic spring are stretched and reset, the first round rod 33, the first sleeve 35, the screw shaft 38 and the abrasive disc 39 are driven to move upwards and reset, meanwhile, the screw rod sleeve 37 drives the screw rod shaft 38 and the abrasive disk 39 to rotate reversely and reset, so that people can take the materials out of the mounting plate 2.

Advancing mechanism 4 is including third support 40, cylinder 41, dysmorphism pole 42, second round bar 43, third round bar 44, second slide rail 45 and expansion plate 46, the left rear side of mounting panel 2 is equipped with third support 40, be equipped with cylinder 41 on the third support 40, the left rear side bottom of mounting panel 2 is equipped with second slide rail 45, sliding connection has expansion plate 46 on second slide rail 45, be equipped with dysmorphism pole 42 on the expansion plate 46, dysmorphism pole 42 upper portion is equipped with second round bar 43, dysmorphism pole 42 lower part is equipped with third round bar 44.

When people need to polish materials, the materials are placed on the mounting plate 2, then people start the air cylinder 41, the air cylinder 41 stretches to move to drive the special-shaped rod 42 and the second round rod 43 to move forwards, when the second round rod 43 is in contact with the first wedge-shaped block 34, the first wedge-shaped block 34 is driven to move downwards, the first wedge-shaped block 34 drives the first round rod 33, the first sleeve 35, the screw shaft 38 and the abrasive disc 39 to move downwards, the first spring 32 and the telescopic spring contract to move, in the process that the screw shaft 38 and the abrasive disc 39 move downwards, the screw shaft 38 and the abrasive disc 39 are driven to rotate by the screw sleeve 37, when the abrasive disc 39 is in contact with the materials, the abrasive disc 39 polishes the materials, the air cylinder 41 contracts to reset to drive the special-shaped rod 42 and the second round rod 43 to move backwards to reset, the first spring 32 and the telescopic spring stretch to reset to drive the first round rod 33, the first sleeve 35 and the abrasive disc 39 to polish the materials, Screw shaft 38 and abrasive disc 39 move up and reset, and screw cover 37 drives screw shaft 38 and abrasive disc 39 antiport simultaneously and resets, and people can take out the material from mounting panel 2, so reciprocal can realize polishing the material automatically, can save artifical time of polishing, improves the efficiency of polishing, and after the material was polished, people closed cylinder 41, dysmorphism pole 42 and second round bar 43 stop motion.

Still including stop gear 5, stop gear 5 is including first deflector 50, bearing frame 51, first pivot 52, gear 53, rack 54 and first fixed plate 55, 2 left sides in front of the mounting panel are equipped with first deflector 50, 2 bottom left sides in front of the mounting panel are equipped with bearing frame 51, the rotary type is connected with first pivot 52 between first deflector 50 and the bearing frame 51, first pivot 52 right part is equipped with gear 53, first pivot 52 left part is equipped with first fixed plate 55, sliding connection has rack 54 on first deflector 50, rack 54 is connected with expansion plate 46, rack 54 meshes with gear 53 mutually.

When people need to polish materials, the materials are placed on the mounting plate 2, then, people start the air cylinder 41, the air cylinder 41 stretches to move to drive the special-shaped rod 42, the third round rod 44 and the telescopic plate 46 to move forwards, the telescopic plate 46 contracts to move, when the telescopic plate 46 can not be continuously contracted, the rack 54 is driven to move forwards, the rack 54 drives the gear 53, the first rotating shaft 52 and the first fixing plate 55 to rotate, so that the first fixing plate 55 is in contact with the materials, the materials can be limited, the materials are prevented from being displaced in the polishing process, the air cylinder 41 contracts to reset to drive the special-shaped rod 42, the third round rod 44 and the telescopic plate 46 to move backwards to reset, the telescopic plate 46 stretches to reset to drive the rack 54 to move backwards to reset, the rack 54 drives the gear 53, the first rotating shaft 52 and the first fixing plate 55 to rotate in the reverse direction, the first fixing plate 55 is separated from the materials, and people can take out the materials, after the material is polished, the air cylinder 41 is closed, and the special-shaped rod 42, the third round rod 44 and the expansion plate 46 stop moving.

The device is characterized by further comprising a pushing mechanism 6, wherein the pushing mechanism 6 comprises a second fixing plate 60, a second spring 61 and a push-pull rod 62, the push-pull rod 62 is connected to the right portion of the mounting plate 2 in a sliding mode, the second fixing plate 60 is arranged at the left end of the push-pull rod 62, and the second spring 61 is connected between the second fixing plate 60 and the mounting plate 2.

When people need to polish materials, the push-pull rod 62 is pulled rightwards manually, the push-pull rod 62 drives the second fixing plate 60 to move rightwards, the second spring 61 contracts to move, then the materials are placed on the mounting plate 2, after the materials are polished and taken out, the second spring 61 stretches and resets, the push-pull rod 62 and the second fixing plate 60 are driven to move leftwards to reset, and the operation is repeated in this way, so that the automatic feeding operation can be carried out on the materials.

The automatic material discharging device further comprises a material discharging mechanism 7, wherein the material discharging mechanism 7 comprises a second guide plate 70, a third spring 71, a third sleeve 72, a fourth spring 73, a second wedge-shaped block 74, a third wedge-shaped block 75, a second rotating shaft 76, a torsion spring 77, a fourth round rod 78, a fourth wedge-shaped block 79 and a fifth spring 710, the second guide plate 70 is arranged on the left front side of the bottom of the mounting plate 2, the third sleeve 72 is connected with the second guide plate 70 in a sliding manner, the third spring 71 is connected between the third sleeve 72 and the second guide plate 70, the third wedge-shaped block 75 is arranged on the rear portion of the third sleeve 72, the second wedge-shaped block 74 is connected with the third sleeve 72 in a sliding manner, the fourth spring 73 is connected between the third sleeve 72 and the second wedge-shaped block 74, the second rotating shaft 76 is rotatably connected on the left side of the bottom of the mounting plate 2, the torsion spring 77 is connected between the second rotating shaft 76 and the mounting plate 2, the fourth round rod 78 is connected on the lower portion of the second rotating shaft 76 in a sliding manner, the fourth wedge block 79 is arranged at the right part of the fourth round rod 78, and a fifth spring 710 is connected between the fourth wedge block 79 and the second rotating shaft 76.

When people need to polish materials, the second fixing plate 60 pushes the materials to the left part of the mounting plate 2, when the materials are in contact with the second wedge-shaped block 74, the second wedge-shaped block 74 is driven to move downwards, the fourth spring 73 contracts, when the materials are separated from the second wedge-shaped block 74, the fourth spring 73 stretches and resets to drive the second wedge-shaped block 74 to move upwards and reset, the second wedge-shaped block 74 limits the materials, then people start the air cylinder 41, the air cylinder 41 stretches to drive the special-shaped rod 42, the third round rod 44 and the expansion plate 46 to move forwards, when the third round rod 44 is in contact with the fourth wedge-shaped block 79, the fourth round rod 78 and the second rotating shaft 76 are driven to rotate, the torsion spring 77 deforms, the third round rod 44 continues to move forwards and is separated from the fourth wedge-shaped block 79, the torsion spring 77 resets to drive the fourth wedge-shaped block 79, the fourth round rod 78 and the second rotating shaft 76 to rotate and reset, the cylinder 41 contracts and resets to drive the special-shaped rod 42, the third round rod 44 and the telescopic plate 46 to move backwards and reset, when the third round rod 44 moves backwards and contacts with the fourth wedge 79 again, the fourth wedge 79 and the fourth round rod 78 are driven to move leftwards, the fifth spring 710 contracts and moves, the fourth round rod 78 moves leftwards and contacts with the third wedge 75 to drive the third wedge 75, the third sleeve 72, the second wedge 74 and the material to move forwards, the third spring 71 contracts and moves, people can take out the material, the third round rod 44 moves backwards and separates from the fourth wedge 79, the fifth spring 710 stretches and resets to drive the fourth round rod 78 and the fourth wedge 79 to move rightwards and reset, meanwhile, the third spring 71 stretches and resets to drive the third wedge 75, the third sleeve 72 and the second wedge 74 to move backwards and reset, after the material is polished, people close the cylinder 41, the profiled bar 42, the third circular bar 44 and the telescopic plate 46 stop moving.

Still including clearance mechanism 8, clearance mechanism 8 is equipped with mount pad 80 including mount pad 80, connecting axle 81 and flabellum 82, the left front side of mounting panel 2, is equipped with connecting axle 81 on the mount pad 80, and connecting axle 81 upper portion rotary type is connected with flabellum 82.

In-process to the material polishing, can have a lot of pieces, people start flabellum 82, and flabellum 82 rotates, can blow away the piece, keeps polishing the clean and tidy on the in-process mounting panel 2, and when people need not use this equipment, it can to close flabellum 82.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.