阅读说明：本技术 一种滤波片生产用激光切割机构 (Laser cutting mechanism is used in filter production ) 是由 张威 马帅 周常河 李长龙 赵雷 于 2021-09-23 设计创作，主要内容包括：本发明涉及滤波片切割机构领域,具体是一种滤波片生产用激光切割机构,包括底座,底座的上端外表面靠近中间两侧位置均开设有第一滑槽,底座的内部设置有调节机构,调节机构上设置有夹持机构,调节机构包括活动座、滑块、第二滑槽、限位杆、转动件、第一转动杆、第一锥形齿轮、第二锥形齿轮、第二转动杆、连接杆；本发明适用于不同厚度以及不同直径的滤波片进行夹持固定,从而提高了装置的通用性,同时还能够便于使用拆卸,拆卸步骤简单、提高了工作效率。(The invention relates to the field of filter plate cutting mechanisms, in particular to a laser cutting mechanism for filter plate production, which comprises a base, wherein first sliding grooves are formed in the positions, close to the middle and on the two sides, of the outer surface of the upper end of the base, an adjusting mechanism is arranged inside the base, a clamping mechanism is arranged on the adjusting mechanism, and the adjusting mechanism comprises a movable seat, a sliding block, a second sliding groove, a limiting rod, a rotating part, a first rotating rod, a first bevel gear, a second rotating rod and a connecting rod; the clamping device is suitable for clamping and fixing the filters with different thicknesses and different diameters, so that the universality of the device is improved, the use and the disassembly are convenient, the disassembly steps are simple, and the working efficiency is improved.)

1. A laser cutting mechanism for filter production comprises a base (1) and is characterized in that first sliding chutes (2) are formed in the positions, close to the middle and two sides, of the outer surface of the upper end of the base (1), an adjusting mechanism (3) is arranged inside the base (1), and a clamping mechanism (5) is arranged on the adjusting mechanism (3);

the adjusting mechanism (3) comprises a movable seat (31), a sliding block (32), a second sliding groove (33), a limiting rod (34), a rotating part (35), a first rotating rod (36), a first bevel gear (37), a second bevel gear (38), a second rotating rod (39) and a connecting rod (391); the outer surface of the lower end of the movable seat (31) is close to a sliding block (32) fixedly connected with one side position, a second sliding groove (33) is formed in the sliding block (32), a limiting rod (34) is connected to the inner portion of the second sliding groove (33) in a sliding mode, two ends of the limiting rod (34) are fixedly connected with two sides of the inner portion of the base (1), the upper end of the rotating part (35) is close to the middle position and is connected with a first rotating rod (36) in a penetrating mode, the first rotating rod (36) penetrates through and extends to one end of the lower end of the rotating part (35) to be fixedly connected with a first bevel gear (37), the outer surface of the first bevel gear (37) is meshed with a second bevel gear (38), the outer surface of the other side of the second bevel gear (38) is fixedly connected with a second rotating rod (39), and the second rotating rod (39) penetrates through and extends out of the inner portion of the base (1), and second dwang (39) extend to outside one end fixedly connected with crank, the upper end surface that rotates piece (35) all articulates near front end and rear end position has connecting rod (391), and the other end of connecting rod (391) articulates in the upper end surface of sliding seat (31).

2. The laser cutting mechanism for producing filter plates as claimed in claim 1, wherein the clamping mechanism (5) comprises a clamp head (51), a fixed block (52), a threaded groove (53), a fixed screw rod (54), a clamping block (55), a rotating groove (56), a cavity (57), an L-shaped rod (58), an annular top piece (59), a limiting block (591) and a clamping block (592); the clamp is characterized in that a thread groove (53) is formed in the outer surface of the upper end of the clamp head (51) close to the middle position, a fixing screw (54) is connected to the inner thread of the thread groove (53), a clamping block (55) is arranged at one end, penetrating into the clamp head (51), of the fixing screw (54), a rotating groove (56) is formed in the outer surface of the upper end of the clamping block (55) close to the middle position, the lower end of the fixing screw (54) penetrates into the rotating groove (56), a fixing block (52) is fixedly connected to the outer surface of one side of the clamp head (51) close to the middle position, a cavity (57) is formed in the fixing block (52), an L-shaped rod (58) is arranged in the cavity (57), an annular ejecting piece (59) is fixedly connected to the other side of the L-shaped rod (58) close to the upper end position, and a clamping block (592) is movably connected to the outer surface of the upper end of the annular ejecting piece (59), the outer surface of the upper end of the movable seat (31) is fixedly connected with a supporting rod (4) at a position close to one side.

3. A laser cutting mechanism for filter production as claimed in claim 2, wherein the number of the L-shaped rods (58) is two, and the other L-shaped rod (58) is located at the lower end of the first L-shaped rod (58), the two L-shaped rods (58) are hinged, and a limit block (591) is fixedly connected to one outer surface of one side of each L-shaped rod (58) near the middle position.

4. The laser cutting mechanism for producing the filter plate as claimed in claim 2, wherein a clamping mechanism (5) is arranged on the outer surface of the other side of the supporting rod (4) close to the upper end, a through hole (41) is formed on the outer surface of one side of the supporting rod (4) close to the upper end, a groove (46) is formed on the outer surface of the other side of the supporting rod (4), the through hole (41) and the groove (46) are communicated with each other, a top block (42) is movably connected inside the through hole (41), the top block (42) penetrates into the groove (46), a spring (44) is fixedly connected to the inner wall of one side of the groove (46), a top plate (43) is fixedly connected to the outer surface of the other side of the spring (44), the top plate (43) and the spring (44) are in a U-shaped structure, and a clamping groove (45) is formed on the upper end of the inner wall of the groove (46), and the inside block of draw-in groove (45) is connected with fixture block (592), and draw-in groove (45) and fixture block (592) both block each other connection.

5. The laser cutting mechanism for producing the filter plate as claimed in claim 1, wherein a baffle (6) is fixedly connected to one side of the two first sliding grooves (2) on the outer surface of the upper end of the base (1), and a thimble (7) is fixedly connected to one side of the baffle (6) close to the upper end.

6. The laser cutting mechanism for producing the filter plate as claimed in claim 5, wherein the thimble (7) penetrates through the inside of the through hole (41) and is attached to the top block (42), and the top block (42) is of a T-shaped structure and is used for preventing the thimble from being separated from the inside of the through hole (41) and simultaneously used for jacking the top plate (43).

Technical Field

The invention relates to the field of filter plate cutting mechanisms, in particular to a laser cutting mechanism for filter plate production.

Background

With the development of mobile internet and the increasing of multimedia information equipment, the demand of more and more products or equipment for optical products and parts is continuously increasing, and thus the production efficiency and quality requirements for various optical processes are gradually increasing, wherein the filter in the optical parts is almost indispensable to exist in various optical related products;

the existing device is used for cutting a large filter plate into small filter plates according to the size requirement when the filter plate is processed, most of the large filter plates are of square structures and are cut into a plurality of small filter plates by laser, and when a small number of filter plates with circular structures are processed, the filter plates are fixed by using the square structures, so that the fixing effect is poor, and the filter plates are easy to loosen, thereby the loss of products is improved, the production cost is further improved;

in view of the above technical drawbacks, a solution is proposed.

Disclosure of Invention

The invention aims to provide a laser cutting mechanism for producing a filter plate, which aims to solve the problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a laser cutting mechanism for filter production comprises a base, wherein first sliding grooves are formed in the positions, close to the middle and two sides, of the outer surface of the upper end of the base, an adjusting mechanism is arranged inside the base, and a clamping mechanism is arranged on the adjusting mechanism;

the adjusting mechanism comprises a movable seat, a sliding block, a second sliding chute, a limiting rod, a rotating part, a first rotating rod, a first bevel gear, a second rotating rod and a connecting rod; a slide block is fixedly connected to the position, close to one side, of the outer surface of the lower end of the movable seat, a second slide groove is formed in the slide block, a limiting rod is connected to the inner portion of the second slide groove in a sliding manner, and both ends of the limiting rod are fixedly connected with both sides in the base, the upper end of the rotating piece is connected with a first rotating rod through the middle position, one end of the first rotating rod which penetrates through and extends to the lower end of the rotating part is fixedly connected with a first bevel gear, the outer surface of the first bevel gear is engaged with a second bevel gear, the outer surface of the other side of the second bevel gear is fixedly connected with a second rotating rod, the second rotating rod penetrates through and extends out of the base, a crank is fixedly connected with one end of the second rotating rod extending to the outside, the outer surface of the upper end of the rotating part is hinged with a connecting rod close to the front end and the rear end, and the other end of the connecting rod is hinged with the outer surface of the upper end of the movable seat.

Further, the clamping mechanism comprises a clamp head, a fixed block, a thread groove, a fixed screw, a clamping block, a rotating groove, a cavity, an L-shaped rod, an annular top piece, a limiting block and a clamping block; the utility model discloses a clamp for fixing a workpiece, including anchor clamps head, clamping block, fixing screw, intermediate position fixedly connected with annular ejecting piece, the upper end surface of anchor clamps head has seted up the thread groove near the intermediate position, the inside threaded connection of thread groove has set screw, set screw runs through into the inside one end of anchor clamps head and is provided with the grip block, and the upper end surface of grip block is close to the intermediate position and has seted up the rotation groove, and set screw's lower extreme runs through into the inside in rotation groove, one side surface of anchor clamps head is close to intermediate position fixedly connected with fixed block, the cavity has been seted up to the inside of fixed block, the inside of cavity is provided with L type pole, and the opposite side of L type pole is close to upper end position fixedly connected with annular ejecting piece, the upper end surface swing joint of annular ejecting piece has the fixture block, the upper end surface of sliding seat is close to one side position fixedly connected with bracing piece.

Furthermore, the quantity of L type pole is two, and its another L type pole is located the lower extreme of first L type pole, two L type pole is articulated to be connected, two one side surface of L type pole is close to intermediate position fixedly connected with stopper for prevent two L type pole is to lateral buckling.

Further, the opposite side surface of bracing piece is close to the upper end position and is provided with fixture, bracing piece one side surface is close to the upper end position and has seted up the through-hole, bracing piece opposite side surface has seted up flutedly, and the through-hole link up with the recess each other, the inside swing joint of through-hole has the kicking block, and the kicking block runs through into the inside of recess, recess one side inner wall fixedly connected with spring, the opposite side surface fixedly connected with roof of spring, the roof is U type structure with the spring, the draw-in groove has been seted up to the inner wall upper end of recess, and the inside block of draw-in groove is connected with the fixture block, and both mutual blocks of draw-in groove and fixture block are connected.

Furthermore, the outer surface of the upper end of the base is located at two fixedly connected baffle plates at one side of the first sliding grooves, and the outer surface of one side of each baffle plate is close to a thimble fixedly connected to the upper end of the baffle plate

Furthermore, the thimble runs through into inside laminating each other with the kicking block of through-hole for dismantle fixture, the kicking block is T type structure, is used for preventing it from breaking away from out inside the through-hole, is used for the roof pressure roof simultaneously.

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

1. in the invention, through arranging the adjusting mechanism, firstly, when the distance between the clamping mechanisms needs to be adjusted, the handle arranged on the second rotating rod is rotated, so that the second rotating rod is driven to rotate, then the first conical gear is driven to rotate through the matching between the second conical gear on the second rotating rod and the first conical gear, then the first rotating rod fixed at the upper end of the first conical gear is driven to rotate, then the rotating piece is driven to rotate clockwise or anticlockwise, then the connecting rods hinged at the two ends of the rotating piece can drive the movable seats to synchronously move towards the adjacent surfaces or towards the outer surfaces by utilizing the special shape of the rotating piece, the sliding block fixed at the lower end of the movable seat, the second sliding chute arranged in the sliding block and the limiting rod movable in the second sliding chute are used for moving along the limiting rod when the movable seat moves, so that the distance between the clamping mechanisms is adjusted, simultaneously, the first sliding groove formed in the upper end of the base can facilitate the clamping mechanism to move on the base, the operation is convenient, and the working efficiency is improved.

2. In the invention, by arranging the clamping mechanism, a large circular filter plate is firstly fixed by the clamp head, if the thickness is larger, the gap in the clamp head is enlarged by twisting the fixing screw rod upwards, so that the filter plate is clamped in the clamp head, the clamped part of the filter plate can be effectively protected by the rubber pad which is glued on the inner wall of the clamp head, the loss is reduced, meanwhile, the filter plate is convenient to be suitable for filter plates with different thicknesses, the practicability is improved, if the clamp heads with different specifications and shapes need to be disassembled and replaced, the supporting rod is moved towards two sides by using the adjusting mechanism, then under the matching of the baffle plate and the ejector pin, the ejector pin is inserted into the through hole to eject the ejector block, the ejector block is forced to eject the top plate, then the L-shaped rod is ejected by the top plate, so that the two L-shaped rods are bent in a hinged mode, and the annular ejector piece is separated from the lower end of the clamping block, so that the clamping block is separated from the inside of the clamping groove, the clamp head can be detached from the supporting rod to be replaced, the detaching mode is convenient and fast, the detaching and replacing efficiency is improved, and the working efficiency is improved.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings;

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a front cross-sectional view of the adjustment mechanism and clamping mechanism of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of the invention at B of FIG. 2;

FIG. 5 is a top view of the adjustment mechanism of the present invention;

FIG. 6 is a top view of FIG. 1 of the present invention

Reference numerals: 1. a base; 2. a first chute; 3. an adjustment mechanism; 31. a movable seat; 32. a slider; 33. a second chute; 34. a limiting rod; 35. a rotating member; 36. a first rotating lever; 37. a first bevel gear; 38. a second bevel gear; 39. a second rotating lever; 391. a connecting rod; 4. a support bar; 41. a through hole; 42. a top block; 43. a top plate; 44. a spring; 45. a card slot; 46. a groove; 5. a clamping mechanism; 51. A clamp head; 52. a fixed block; 53. a thread groove; 54. fixing the screw rod; 55. a clamping block; 56. a rotating groove; 57. a cavity; 58. an L-shaped rod; 59. an annular top member; 591. a limiting block; 592. a clamping block; 6. a baffle plate; 7. and (4) a thimble.

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.

As shown in fig. 1-6, the laser cutting mechanism for producing a filter provided by the invention comprises a base 1, wherein first sliding grooves 2 are respectively formed in the outer surface of the upper end of the base 1, which is close to the middle of the base, at two sides, an adjusting mechanism 3 is arranged in the base 1 and is used for adapting to filters with different diameters, and a clamping mechanism 5 is arranged on the adjusting mechanism 3 and is used for clamping filters with different thicknesses and different shapes;

the adjusting mechanism 3 comprises a movable seat 31, a slide block 32, a second chute 33, a limiting rod 34, a rotating part 35, a first rotating rod 36, a first bevel gear 37, a second bevel gear 38, a second rotating rod 39 and a connecting rod 391; a sliding block 32 is fixedly connected to a position, close to one side, of the outer surface of the lower end of the movable seat 31, a second sliding groove 33 is formed in the sliding block 32, a limiting rod 34 is slidably connected to the inside of the second sliding groove 33, two ends of the limiting rod 34 are fixedly connected to two sides inside the base 1, the sliding block is used for fixing the adjusting mechanism 3 and limiting the movable diameter and range of the movable seat 31, a first rotating rod 36 penetrates through the upper end of the rotating component 35 and is connected to the middle position of the upper end of the rotating component 35, a first bevel gear 37 penetrates through the first rotating rod 36 and extends to one end of the lower end of the rotating component 35, a second bevel gear 38 is connected to the outer surface of the first bevel gear 37 in a meshing manner, a second rotating rod 39 is fixedly connected to the outer surface of the other side of the second bevel gear 38, the second rotating rod 39 penetrates through and extends out of the base 1, and a crank is fixedly connected to one end of the second rotating rod 39 extending to the outside, utilize the crank can be convenient for rotate the distance of adjusting fixture 5, the upper end surface of rotating the piece 35 is close to the front end and all articulates in rear end position has connecting rod 391, and the other end of connecting rod 391 articulates in the upper end surface of sliding seat 31, utilizes two connecting rods 391 can pull sliding seat 31 under the rotation of rotating the piece 35 effectively and remove to realize the regulation of interval.

When the device works, because the diameters of the circular structures are different in size and the distance needs to be adjusted, the operation steps of the conventional device are more complicated when the distance is adjusted, and the work efficiency is reduced by loosening screws on one side, by arranging the adjusting mechanism 3, firstly, when the distance of the clamping mechanism 5 needs to be adjusted, the handle arranged on the second rotating rod 39 is rotated, so that the second rotating rod 39 is driven to rotate, then the first conical gear 37 is driven to rotate through the matching between the second conical gear 38 on the second rotating rod 39 and the first conical gear 37, then the first rotating rod 36 fixed at the upper end of the first conical gear 37 is driven to rotate, then the rotating piece 35 is driven to rotate clockwise or anticlockwise, and then the connecting rods 391 hinged at the two ends of the rotating piece 35 can drive the movable seats 31 to synchronously move towards the adjacent surface or towards the outer surface by utilizing the special shape of the rotating piece 35, through the slider 32 fixed at the sliding block 31 lower extreme and set up at the inside second spout 33 of slider 32 and the gag lever post 34 of activity in the inside of second spout 33 for move along gag lever post 34 when sliding block 31 removes, thereby realize the interval control to fixture 5, fixture 5 can be convenient for to remove on base 1 at the first spout 2 that base 1 upper end was seted up simultaneously, and the simple operation has improved work efficiency.

As shown in fig. 1-6, the clamping mechanism 5 includes a clamp head 51, a fixed block 52, a threaded groove 53, a fixed screw 54, a clamping block 55, a rotating groove 56, a cavity 57, an L-shaped rod 58, an annular top member 59, a limit block 591, and a clamping block 592; the outer surface of the upper end of the clamp head 51 is provided with a thread groove 53 close to the middle position, the inner thread of the thread groove 53 is connected with a fixed screw 54, one end of the fixed screw 54 penetrating into the clamp head 51 is provided with a clamping block 55, the outer surface of the upper end of the clamping block 55 close to the middle position is provided with a rotating groove 56, the rotating groove 56 is utilized to facilitate the rotation of the fixed screw 54, the clamping block 55 is prevented from being driven to rotate when the fixed screw 54 rotates, the lower end of the fixed screw 54 penetrates into the rotating groove 56, the outer surface of one side of the clamp head 51 close to the middle position is fixedly connected with a fixed block 52, the inner part of the fixed block 52 is provided with a cavity 57, the inner part of the cavity 57 is provided with an L-shaped rod 58, the other side of the L-shaped rod 58 close to the upper end position is fixedly connected with an annular top member 59 for fixing and separating a clamping block 592, and the outer surface of the annular top member 59 is movably connected with the clamping block 592, the outer surface of the upper end of the movable seat 31 close to one side is fixedly connected with the support rods 4, the number of the L-shaped rods 58 is two, the other L-shaped rod 58 is positioned at the lower end of the first L-shaped rod 58, the two L-shaped rods 58 are hinged, and the outer surface of one side of the two L-shaped rods 58 close to the middle is fixedly connected with a limiting block 591 for limiting the two L-shaped rods 58 and preventing the L-shaped rods 58 from bending to one side;

the outer surface of the other side of the supporting rod 4 near the upper end is provided with a clamping mechanism 5, the outer surface of one side of the supporting rod 4 near the upper end is provided with a through hole 41, the outer surface of the other side of the supporting rod 4 is provided with a groove 46, the through hole 41 is communicated with the groove 46, the inside of the through hole 41 is movably connected with a top block 42 for applying pressure to the top plate 43, thereby the top plate 43 is jacked into the cavity 57, the top block 42 penetrates into the groove 46, the spring 44 is fixedly connected with the inner wall of one side of the groove 46, the top plate 43 is fixedly connected with the outer surface of the other side of the spring 44, the top plate 43 and the spring 44 are in a U-shaped structure and are used for resetting the top block 42 when not in use, therefore, the next use is carried out, the upper end of the inner wall of the groove 46 is provided with a clamping groove 45, the clamping block 592 is clamped and connected inside the clamping groove 45, and the clamping groove 45 and the clamping block 592 are mutually clamped and connected for fixing the clamping mechanism 5.

When the device works, when the existing device is used for processing a filter plate, a large filter plate is cut into small filter plates according to the size requirement, most of the large filter plates are in square structures, and are cut into a plurality of small filter plates through laser cutting, when a few of the filter plates with circular structures are processed, the filter plates are fixed by using the square structures, the fixing effect is poor, the filter plates are easy to loosen, the loss of products is improved, the production cost is further improved, and meanwhile, when the filter plates need to be disassembled, the disassembling steps are complicated, the device firstly fixes the large circular filter plates through the clamp head 51 by arranging the clamping mechanism 5, the supporting rod 4, the jacking block 42, the jacking rod and other structures, and the like, if the thickness is larger, the gap inside the clamp head 51 is enlarged by twisting the fixing screw rod 54 upwards, so that the filter plates are clamped inside the clamp head 51, the rubber pad which is glued to the inner wall of the clamp head 51 can effectively protect the clamped part of the filter plates, reduce the loss, be convenient for be suitable for the filter of different thickness simultaneously, improve the practicality, when needing to dismantle the anchor clamps head 51 of changing different specification and shape, through utilizing adjustment mechanism 3, with bracing piece 4 to both sides removal, then under baffle 6 and thimble 7's cooperation, thimble 7 inserts into the inside roof pressure kicking block 42 of through-hole 41, force kicking block 42 roof pressure roof 43, then through roof 43 roof pressure L type pole 58, make two L type poles 58 utilize articulated mode to buckle, thereby make annular kicking block 59 break away from the lower extreme of fixture block 592, make fixture block 592 break away from the inside of draw-in groove 45, can dismantle anchor clamps head 51 from bracing piece 4 and change, it is convenient to dismantle the mode, the efficiency of dismantling the change is improved, and then work efficiency is improved.

The working principle of the invention is as follows:

when in use, firstly, the adjusting clamping mechanism 5 is adjusted to a required position, the handle arranged on the second rotating rod 39 is rotated, so as to drive the second rotating rod 39 to rotate, then the first conical gear 37 is driven to rotate through the matching between the second conical gear 38 on the second rotating rod 39 and the first conical gear 37, then the first rotating rod 36 fixed at the upper end of the first conical gear 37 is driven to rotate, then the rotating part 35 is driven to rotate clockwise or anticlockwise, then the connecting rods 391 hinged at two ends of the rotating part 35 can drive the movable seat 31 to synchronously move towards an adjacent surface or outwards by utilizing the special shape of the rotating part 35, and the movable seat 31 moves along the limiting rod 34 when moving through the sliding block 32 fixed at the lower end of the movable seat 31, the second sliding chute 33 arranged inside the sliding block 32 and the limiting rod 34 moving inside the second sliding chute 33, thereby realizing the distance adjustment of the clamping mechanism 5, meanwhile, the first chute 2 arranged at the upper end of the base 1 can facilitate the movement of the clamping mechanism 5 on the base 1, the operation is convenient, the work efficiency is improved, and then the large circular filter plate is fixed by the clamp head 51, if the thickness is larger, the gap inside the clamp head 51 is enlarged by twisting the fixing screw 54 upwards, thereby clamping the filter plate inside the clamp head 51, the clamped part of the filter plate can be effectively protected by the rubber pad glued on the inner wall of the clamp head 51, the loss is reduced, meanwhile, the filter plates with different thicknesses are convenient to be applied, the practicability is improved, if the clamp heads 51 with different specifications and shapes need to be disassembled and replaced, the support rod 4 is moved towards two sides by utilizing the adjusting mechanism 3, then under the matching of the baffle 6 and the thimble 7, the thimble 7 is inserted into the jacking block 42 inside the through hole 41, the ejector block 42 is forced to press the top plate 43, then the L-shaped rods 58 are pressed through the top plate 43, so that the two L-shaped rods 58 are bent in a hinged mode, the annular ejector piece 59 is separated from the lower end of the clamping block 592, the clamping block 592 is separated from the inside of the clamping groove 45, the clamp head 51 can be detached from the supporting rod 4 for replacement, the detaching mode is convenient, detaching and replacing efficiency is improved, and working efficiency is improved.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.