阅读说明：本技术 一种led灯丝灯的点焊机 (Spot welding machine for LED filament lamp ) 是由 陈旭 于 2021-09-27 设计创作，主要内容包括：本发明公开了一种LED灯丝灯的点焊机,包括：工作台,工作台的顶面安装有导料机构、送料机构和焊接机,工作台的内部为中空结构且顶面开设有与中空结构相连通的安装孔、滑槽一和滑槽二。本发明通过送料机构来对灯丝进行存储并由气缸推动推板来对灯丝进行导料,将灯丝导向至焊接机上并通过焊接机中部的固定盒来对灯丝进行固定；送料盘边缘处开设的储料槽放置灯座,且送料盘每次转动后将下一个储料槽转动至固定盒下方,并通过焊接头来对灯丝与灯座焊接固定,固定完成后通过送料盘继续转动至下游,焊接完成的LED灯转动至导料槽后,由内部传出空气将LED灯向外推出进行下料操作,减少人工上料操作的繁琐,提高加工效率。(The invention discloses a spot welding machine of an LED filament lamp, which comprises: the guide mechanism, feeding mechanism and welding machine are installed to the top surface of workstation, and the inside of workstation is hollow structure and the top surface is seted up mounting hole, spout one and the spout two that are linked together with hollow structure. The filament storage device stores the filament through the feeding mechanism, the push plate is pushed by the air cylinder to guide the filament, the filament is guided to the welding machine, and the filament is fixed through the fixing box in the middle of the welding machine; the lamp stand is placed to the stock chest that feed table edge was seted up, and rotates the next stock chest to fixed box below after the feed table rotates at every turn to come filament and lamp stand welded fastening through the soldered connection, continue to rotate to low reaches through the feed table after fixed the completion, and the LED lamp that the welding was accomplished rotates to the baffle box after, spreads the air by inside and outwards releases the LED lamp and carry out the unloading operation, reduces the loaded down with trivial details of artifical material loading operation, improves machining efficiency.)

1. A spot welder for LED filament lamps comprising: workstation (1), its characterized in that: the material guide mechanism, the feeding mechanism and the welding machine (4) are mounted on the top surface of the workbench (1), the interior of the workbench (1) is of a hollow structure, the top surface of the workbench is provided with a mounting hole (7) communicated with the hollow structure, a first sliding groove (10) and a second sliding groove (11), and the mounting hole (7) is a circular hole and is formed in the middle of the surface of the workbench (1);

the material guide mechanism comprises a material guide plate (6), the material guide plate (6) is rotatably connected into the mounting hole (7), and a plurality of material storage tanks I (9) which are distributed annularly are uniformly arranged at the edge of the material guide plate (6);

feeding mechanism arranges the top of spout two (11) in and including feeding box (12) that three equidistance distributes, it is three feeding box (12) are perpendicular crossing with spout two (11) respectively, and feeding box (12) front end extends to the top edge of mounting hole (7), and the front end bottom of feeding box (12) forms the breach, and synchronous board (16) fixed connection is adopted to the end of three feeding box (12), install three cylinder three (15) on synchronous board (16), the output of cylinder three (15) extends to in feeding box (12).

2. The spot welding machine for the LED filament lamp according to claim 1, wherein: adjusting ring (19) are installed to the bottom of baffle box (6), the upper end and baffle box (6) fixed connection of adjusting ring (19), and install bearing (18) on the lateral wall of adjusting ring (19) and rotate through bearing (18) and workstation (1) and be connected, a plurality of teeth are inwards sunken and evenly installed to the inner wall of adjusting ring (19), the meshing is connected with gear (20) on the tooth, the axle head of gear (20) is connected with the power take off end of motor (22), the interior bottom at workstation (1) is installed in motor (22).

3. The spot welding machine for the LED filament lamp according to claim 1, wherein: the material guide plate is characterized in that a through hole is formed in the middle of the bottom of the material guide plate (6), a pneumatic sliding ring (21) is connected to the through hole, a plurality of air holes (17) which are distributed annularly by taking the through hole as the center are formed in the material guide plate (6), one end of each air hole (17) is communicated with the through hole, and the other end of each air hole extends to the first material storage tank (9) to form an opening.

4. The spot welding machine for the LED filament lamp according to claim 1, wherein: the utility model discloses a U-shaped structure, including workstation (1), mount (3), runner (10) and welding machine (4), the internally mounted of workstation (1) has the moving mechanism who is connected with mount (3), cylinder two (5) are installed to the top surface of mount (3), the U font structure that mount (3) are the inversion and both ends pass respectively inside workstation (1), the bottom surface middle part of mount (3) is connected with welding machine (4).

5. A spot welder of an LED filament lamp according to claim 4, characterized in that: moving mechanism includes motor two (37), screw rod (24) and adjusting sleeve (23), screw rod (24) set up below and tip and workstation (1) rotation connection at spout two (11), the internally mounted of workstation (1) has the baffle, the end of screw rod (24) is passed the baffle and is connected with synchronization disc (25), two synchronization disc (25) adopt hold-in range (26) to connect, adjusting sleeve (23) inside is provided with the internal thread and passes through internal thread and screw rod (24) threaded connection, the top of adjusting sleeve (23) and the terminal fixed connection of mount (3), motor two (37) are installed on the outer wall of workstation (1) and the power take off end of motor two (37) extends to workstation (1) inside and is connected with one of them screw rod (24).

6. The spot welding machine for the LED filament lamp according to claim 1, wherein: the middle part of welding machine (4) has seted up fixed slot (33), fixed slot (33) inside swing joint has fixed box (32), double-layered groove (35) are seted up on the surface of fixed box (32), and the inside of fixed box (32) and the both sides that are located double-layered groove (35) are provided with spacing gasbag (34) respectively, the surface of welding machine (4) is pressed close to with the front end of pay-off case (12), and soldered connection (36) are installed to the bottom of fixed box (32), and the top surface of fixed box (32) is connected with the output of cylinder two (5).

7. The spot welding machine for the LED filament lamp according to claim 1, wherein: the top surface of the feeding box (12) is inwards provided with a second storage tank (13), the second storage tank (13) extends to the front end of the feeding box (12) and the front end of the second storage tank (13) is provided with a limiting strip (29), the rear surface end of the second storage tank (13) is provided with a feeding groove (14), the output end of the third cylinder (15) extends to the inside of the second storage tank (13) and is connected with a push plate (27), and the bottom of the second storage tank (13) is provided with a positioning groove (28).

8. The spot welding machine for the LED filament lamp according to claim 1, wherein: be located both sides pay-off case (12) bottom is installed the connecting rod and the connecting rod extends to workstation (1) inside through spout two (11), workstation (1) internally mounted have with connecting rod end sliding connection's slide rail (30), two connecting rod middle parts of being connected with same pay-off case (12) are fixed with and are pushed away frame (31), it is U font structure to push away frame (31), cylinder (2) are installed to the both sides of workstation (1), the power take off end of cylinder (2) extends to workstation (1) inside and is connected with pushing away frame (31).

9. The spot welding machine for the LED filament lamp according to claim 1, wherein: the first sliding groove (10) and the second sliding groove (11) are respectively provided with two sliding grooves, the first sliding groove (10) is arranged on two sides of the middle of the workbench (1) and extends longitudinally, the second sliding groove (11) is arranged on the surface of the workbench (1) and is located behind the mounting hole (7), and the second sliding groove (11) extends transversely.

10. The spot welding machine for the LED filament lamp according to claim 1, wherein: the utility model discloses a material guide device, including workstation (1), mounting hole (7), baffle box (8) have been seted up to the front end of workstation (1) formation guide slope and guide slope middle part, the tip of baffle box (8) extends and communicates with mounting hole (7) to workstation (1).

Technical Field

The invention relates to the technical field of LED lamp processing, in particular to a spot welding machine for an LED filament lamp.

Background

The LED lamp filament is also called as an LED lamp post, the traditional LED light source needs to reach a certain illuminance and illumination area, optical devices such as lenses need to be additionally arranged, the illumination effect is influenced, the due energy-saving effect of the LED can be reduced, the LED lamp filament can emit light at 360 degrees in all angles, the light can be emitted at large angles, the lenses do not need to be added, the three-dimensional light source is realized, and unprecedented illumination experience is brought. The LED filament lamp is produced by a spot welding device to weld the LED lamp and the LED lamp supporting legs together.

At present, the existing spot welding machine for the LED filament lamp needs to load and unload materials in the process of welding the filament, and the loading and unloading are both manually operated, so that the operation is complicated, and the processing efficiency is low; the automatic feeding equipment has a complex structure and high use cost, and has higher requirements on the technical level of operators. For this reason, a new scheme needs to be designed to give improvements.

Disclosure of Invention

The invention aims to provide a spot welder for an LED filament lamp, which solves the problems that the existing spot welder for the LED filament lamp needs to load and unload materials in the filament welding process, the loading and unloading are both manually operated, the operation is complicated, and the processing efficiency is low; automatic feeding equipment structure is complicated, and use cost is high, to the higher problem of operator's technical merit requirement, satisfies the in-service use demand.

In order to achieve the purpose, the invention provides the following technical scheme: a spot welder for LED filament lamps comprising: the material guide mechanism, the feeding mechanism and the welding machine are installed on the top surface of the workbench, the interior of the workbench is of a hollow structure, the top surface of the workbench is provided with a mounting hole, a first sliding groove and a second sliding groove, the mounting hole is a circular hole and is formed in the middle of the surface of the workbench, and the mounting hole is communicated with the hollow structure;

the material guide mechanism comprises a material guide plate, the material guide plate is rotatably connected in the mounting hole, and a plurality of material storage tanks I which are distributed annularly are uniformly arranged at the edge of the material guide plate;

feeding mechanism arranges the top of spout two in and including the pay-off case that three equidistance distributes, it is three the pay-off case is perpendicular crossing with spout two respectively, and the pay-off case front end extends to the top edge of mounting hole, and the front end bottom of pay-off case forms the breach, and synchronous board fixed connection is adopted to the end of three pay-off case, install three cylinder three on the synchronous board, the output of cylinder three extends to in the pay-off case.

As a preferred embodiment of the present invention, an adjusting ring is installed at the bottom of the material guiding disc, the upper end of the adjusting ring is fixedly connected with the material guiding disc, a bearing is installed on the side wall of the adjusting ring and is rotatably connected with the workbench through the bearing, a plurality of teeth are uniformly installed on the inner wall of the adjusting ring and are recessed inwards, a gear is connected to the teeth in a meshing manner, the shaft end of the gear is connected with the power output end of a first motor, and the first motor is installed at the inner bottom of the workbench.

As a preferred embodiment of the invention, a through hole is formed in the middle of the bottom surface of the material guide plate, a pneumatic slip ring is connected inside the through hole, a plurality of air holes are formed in the material guide plate and distributed annularly around the through hole, one end of each air hole is communicated with the through hole, and the other end of each air hole extends to one position of the material storage tank to form an opening.

As a preferred embodiment of the invention, a fixing frame is arranged at the top of the workbench, the fixing frame is of an inverted U-shaped structure, two ends of the fixing frame respectively penetrate through the sliding grooves and extend into the workbench, the middle of the bottom surface of the fixing frame is connected with a welding machine, a moving mechanism connected with the fixing frame is arranged in the workbench, and a second air cylinder is arranged on the top surface of the fixing frame.

As a preferred embodiment of the invention, the moving mechanism comprises a second motor, a screw rod and an adjusting sleeve, the screw rod is arranged below the second sliding groove, the end part of the screw rod is rotatably connected with the workbench, a partition plate is arranged inside the workbench, the tail end of the screw rod penetrates through the partition plate and is connected with a synchronous disc, the two synchronous discs are connected by adopting a synchronous belt, an internal thread is arranged inside the adjusting sleeve and is in threaded connection with the screw rod through the internal thread, the top part of the adjusting sleeve is fixedly connected with the tail end of the fixing frame, the second motor is arranged on the outer wall of the workbench, and the power output end of the second motor extends into the workbench and is connected with one of the screw rods.

As a preferred embodiment of the invention, a fixing groove is formed in the middle of the welding machine, a fixing box is movably connected inside the fixing groove, a clamping groove is formed in the surface of the fixing box, limiting air bags are respectively arranged inside the fixing box and on two sides of the clamping groove, the surface of the welding machine is close to the front end of the feeding box, a welding head is arranged at the bottom of the fixing box, and the top surface of the fixing box is connected with the output end of the air cylinder II.

As a preferred embodiment of the invention, a storage tank II is inwards arranged on the top surface of the feeding box, the storage tank II extends to the front end of the feeding box, a limiting strip is arranged at the front end of the storage tank II, a feeding groove is arranged at the rear end of the surface of the storage tank II, an output end of the air cylinder III extends to the inside of the storage tank II and is connected with a push plate, and a positioning groove is arranged at the bottom of the storage tank II.

As a preferred embodiment of the invention, the bottom of the feeding box at two sides is provided with a connecting rod, the connecting rod extends into the workbench through a second sliding groove, the workbench is internally provided with a sliding rail connected with the tail end of the connecting rod in a sliding manner, the middle parts of the two connecting rods connected with the same feeding box are fixedly provided with a pushing frame, the pushing frame is in a U-shaped structure, two sides of the workbench are provided with a first air cylinder, and the power output end of the first air cylinder extends into the workbench and is connected with the pushing frame.

As a preferred embodiment of the present invention, two sliding chutes are respectively disposed on the first sliding chute and the second sliding chute, the first sliding chute is disposed on two sides of the middle portion of the workbench and extends longitudinally, the second sliding chute is disposed on the surface of the workbench and is located behind the mounting hole, and the two sliding chutes extend transversely.

As a preferred embodiment of the present invention, a material guiding slope is formed at the front end of the workbench, a material guiding chute is formed in the middle of the material guiding slope, and an end of the material guiding chute extends toward the workbench and is communicated with the mounting hole.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the filament storage device, the filament is stored through the feeding mechanism, the push plate is pushed by the air cylinder to guide the filament, the filament is guided to the welding machine, and the filament is fixed through the fixing box in the middle of the welding machine; the lamp stand is placed to the stock chest that feed table edge was seted up, and rotates the next stock chest to fixed box below after the feed table rotates at every turn to come filament and lamp stand welded fastening through the soldered connection, continue to rotate to low reaches through the feed table after fixed the completion, and the LED lamp that the welding was accomplished rotates to the baffle box after, spreads the air by inside and outwards releases the LED lamp and carry out the unloading operation, reduces the loaded down with trivial details of artifical material loading operation, improves machining efficiency.

(2) In the invention, the feeding mechanism comprises three feeding boxes, and the feeding mechanism is pushed by the air cylinder after the output of the lamp filaments in the single feeding box group is finished, so that the feeding box storing the lamp filaments is arranged in the middle and corresponds to the welding machine, and the continuous processing can be realized.

Drawings

FIG. 1 is a block diagram of a spot welder for LED filament lamps in accordance with the present invention;

FIG. 2 is a structural view of a material guide plate according to the present invention;

FIG. 3 is a top view of the material guiding plate of the present invention

FIG. 4 is an internal structure view of the material guiding plate according to the present invention;

FIG. 5 is a structural view of the feeding mechanism of the present invention

FIG. 6 is an internal structural view of the hopper of the present invention;

FIG. 7 is a structural view of the pushing frame according to the present invention

FIG. 8 is an internal structural view of the table according to the present invention;

FIG. 9 is a block diagram of a welder according to the present invention;

fig. 10 is a structural view of the fixing case according to the present invention.

In the figure, 1, a workbench; 2. a first cylinder; 3. a fixed mount; 4. welding machine; 5. a second air cylinder; 6. a material guide plate; 7. mounting holes; 8. a material guide chute; 9. a first storage tank; 10. a first sliding chute; 11. a second chute; 12. a feeding box; 13. a second storage tank; 14. a feed chute; 15. a third air cylinder; 16. a synchronization board; 17. air holes; 18. a bearing; 19. an adjusting ring; 20. a gear; 21. a pneumatic slip ring; 22. a first motor; 23. adjusting the sleeve; 24. a screw; 25. a synchronization disc; 26. a synchronous belt; 27. pushing the plate; 28. positioning a groove; 29. a limiting strip; 30. a slide rail; 31. a pushing frame; 32. a fixing box; 33. fixing grooves; 34. a limiting air bag; 35. a clamping groove; 36. welding a head; 37. and a second motor.

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 of the 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 one

Referring to fig. 1-10, the present invention provides a technical solution: a spot welder for LED filament lamps comprising: the material guide mechanism, the feeding mechanism and the welding machine 4 are installed on the top surface of the workbench 1, the interior of the workbench 1 is of a hollow structure, the top surface of the workbench 1 is provided with a mounting hole 7, a first sliding groove 10 and a second sliding groove 11 which are communicated with the hollow structure, and the mounting hole 7 is a circular hole and is formed in the middle of the surface of the workbench 1; the material guide mechanism comprises a material guide plate 6, the material guide plate 6 is rotatably connected in the mounting hole 7, a plurality of material storage tanks 9 which are distributed annularly are uniformly formed in the edge of the material guide plate 6, and the material guide plate 6 can be matched with a vibration feeding machine for use to automatically feed the lamp holder; feeding mechanism arranges the top of spout two 11 in and includes the feed box 12 of three equidistance distribution, fill the LED filament in the feed box 12 respectively, pay-off through feed box 12, after the pay-off of single feed box 12 is accomplished, the feed box 12 that will deposit the LED filament moves to the middle part, empty feed box 12 is filled again, sustainability processing, three feed box 12 is perpendicular crossing with spout two 11 respectively, and feed box 12 front end extends to the top edge of mounting hole 7, the front end bottom of feed box 12 forms the breach, synchronous board 16 fixed connection is adopted to the end of three feed box 12, install three cylinders three 15 on the synchronous board 16, the output of cylinder three 15 extends to in the feed box 12, promote synchronous board 16 through cylinder three 15, and promote feed box 12 to remove.

Further improved, as shown in fig. 1 and 8: the top of workstation 1 is provided with mount 3, inside mount 3 is inverted U font structure and both ends passed spout one 10 respectively and extended to workstation 1, the bottom surface middle part of mount 3 is connected with welding machine 4, the internally mounted of workstation 1 has the moving mechanism who is connected with mount 3, cylinder two 5 is installed to the top surface of mount 3, promote the fixed box 32 in the welding machine 4 through cylinder two 5, will fix the box 32 and promote downwards to make the welding foot of LED filament and the welding point contact of lamp stand. Moving mechanism includes motor two 37, screw rod 24 and adjusting sleeve 23, screw rod 24 sets up below two 11 in the spout and the tip rotates with workstation 1 to be connected, the internally mounted of workstation 1 has the baffle, the end of screw rod 24 passes the baffle and is connected with synchronization disc 25, two synchronization discs 25 adopt hold-in range 26 to connect, adjusting sleeve 23 is inside to be provided with the internal thread and to pass through internal thread and screw rod 24 threaded connection, adjusting sleeve 23's top and the terminal fixed connection of mount 3, motor two 37 is installed on workstation 1's outer wall and motor two 37's power take off end extends to workstation 1 inside and is connected with one of them screw rod 24.

Further improved, as shown in fig. 1: the first sliding grooves 10 and the second sliding grooves 11 are respectively provided with two sliding grooves, the first sliding grooves 10 are arranged on two sides of the middle of the workbench 1 and extend longitudinally, the second sliding grooves 11 are arranged on the surface of the workbench 1 and are located behind the mounting holes 7, the two sliding grooves 11 extend transversely, the fixing frame 3 moves along the extending direction of the first sliding grooves 10, and the feeding mechanism moves along the extending direction of the second sliding grooves 11.

Further improved, as shown in fig. 1: the baffle box 8 has been seted up at the front end of workstation 1 end guide slope and guide slope middle part, and the tip of baffle box 8 extends to workstation 1 and communicates with mounting hole 7, is convenient for derive the LED lamp that the welding was accomplished.

Example two

In a further improvement, as shown in fig. 2 to 4: adjusting ring 19 is installed to the bottom of baffle box 6, adjusting ring 19's upper end and baffle box 6 fixed connection, and install bearing 18 on adjusting ring 19's the lateral wall and rotate with workstation 1 through bearing 18 and be connected, improve baffle box 6 pivoted stability, adjusting ring 19's inner wall is inwards sunken and evenly installs a plurality of tooth, the meshing is connected with gear 20 on the tooth, gear 20's axle head is connected with the power take off end of a motor 22, the interior bottom at workstation 1 is installed to a motor 22, thereby the motor drives gear 20 and rotates drive adjusting ring 19 and rotate, the motor rotates fixed angle at every turn. Through-hole and through-hole internal connection have pneumatic sliding ring 21 have been seted up at the bottom surface middle part of baffle disc 6, and a plurality of uses the through-hole to be the gas pocket 17 that the annular distributes as the center still seted up to the inside of baffle disc 6, and the one end and the through-hole intercommunication of gas pocket 17, the other end extend to a stock chest 9 department and form the opening, come to the inside air guide of through-hole through pneumatic sliding ring 21, and gas passes through the output of gas pocket 17 to the LED lamp that will rotate to baffle box 8 blows off, unloads.

EXAMPLE III

In a further improvement, as shown in fig. 9-10: fixed slot 33 has been seted up at the middle part of welding machine 4, fixed slot 33 inside swing joint has fixed box 32, double-layered groove 35 is seted up on the surface of fixed box 32, the inside of fixed box 32 and the both sides that are located double-layered groove 35 are provided with spacing gasbag 34 respectively, the surface of welding machine 4 is pressed close to with the front end of delivery box 12, soldered connection 36 is installed to the bottom of fixed box 32, the top surface of fixed box 32 is connected with two 5's of cylinder output, adjust the position of fixed box 32 through the cylinder, spacing gasbag 34 can carry out the centre gripping spacingly to the LED filament through aerifing the gassing, and can not lead to the fact the damage to the filament, the yield is improved.

Example four

In a further improvement, as shown in fig. 5 to 7: the top surface of pay-off case 12 has inwards seted up stock chest two 13, and spacing strip 29 is installed to the front end that stock chest two 13 extended to pay-off case 12 and the front end department of stock chest two 13, and the pay-off groove 14 has been seted up to the surperficial rear end of stock chest two 13, and the output of cylinder three 15 extends to inside and be connected with push pedal 27 of stock chest two 13, and constant head tank 28 has been seted up to the bottom of stock chest two 13. The connecting rod is installed to the pay-off case 12 bottom that is located both sides and the connecting rod extends to workstation 1 inside through spout two 11, 1 internally mounted of workstation has slide rail 30 with the terminal sliding connection of connecting rod, two connecting rod middle parts of being connected with same pay-off case 12 are fixed with promotion frame 31, promotion frame 31 is U font structure, cylinder 2 is installed to the both sides of workstation 1, the power take off end of cylinder 2 extends to workstation 1 inside and is connected with promotion frame 31, promote push pedal 27 through cylinder three 15, push pedal 27 promotes inside LED filament and moves forward, thereby shift out and imbed in the fixed box 32 by the stock chest front end, cylinder 2 adjustment feeding mechanism's position.

When the filament storage device is used, the filament is stored through the feeding mechanism, the push plate 27 is pushed by the air cylinder to feed the filament, the filament is guided to the welding machine 4 and is fixed through the fixing box 32 in the middle of the welding machine 4, the LED filament is clamped through the limiting air bag 34, and the fixing box 32 is pushed by the air cylinder II 5 to move downwards so as to be contacted with a lamp holder below; the lamp stand is placed to the stock chest that feed table edge was seted up, and the feed table rotates the next stock chest to fixed box 32 below after rotating at every turn to come filament and lamp stand welded fastening through soldered connection 36, continue to rotate to low reaches through the feed table after fixed the completion, the LED lamp that the welding was accomplished rotates to baffle box 8 back, outwards releases the LED lamp by inside spread air and carries out the unloading operation, reduces the loaded down with trivial details of artifical material loading operation, improves machining efficiency. The feeding mechanism comprises three feeding boxes 12, and the feeding mechanism is pushed by the air cylinder after the output of the lamp filaments in the single feeding box 12 is finished, so that the feeding box 12 storing the lamp filaments is arranged in the middle and corresponds to the welding machine 4, and continuous processing can be realized.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.