阅读说明：本技术 一种医用电子分药设备上的药物定量输出结构 (Medicine quantitative output structure on medical electronic medicine dispensing equipment ) 是由 孙佳宇 于 2020-07-31 设计创作，主要内容包括：本发明公开的一种医用电子分药设备上的药物定量输出结构,包括存药筒,所述存药筒的下端连接有支撑驱动结构,且存药筒的下端连接有连接结构,所述连接结构的下端连接有挤压输出结构,且挤压输出结构的下端连接有注射筒,所述注射筒和支撑驱动结构之间固定连接,所述存药筒的上端开设有进料口,所述支撑驱动结构包括支撑盘、第一连接孔、第一通孔、第二通孔、电动推杆、圆盘、对接孔。本发明所述的一种医用电子分药设备上的药物定量输出结构,支撑驱动结构利用电动推杆实现连接结构、挤压输出结构上下伸缩,从而调控挤压输出结构进入注射筒内部深度,实现定量输出,方便挤压输出结构挤压注射筒。(The invention discloses a medicine quantitative output structure on medical electronic medicine distribution equipment, which comprises a medicine storage cylinder, wherein the lower end of the medicine storage cylinder is connected with a supporting drive structure, the lower end of the medicine storage cylinder is connected with a connecting structure, the lower end of the connecting structure is connected with an extrusion output structure, the lower end of the extrusion output structure is connected with an injection cylinder, the injection cylinder and the supporting drive structure are fixedly connected, the upper end of the medicine storage cylinder is provided with a feeding hole, and the supporting drive structure comprises a supporting disk, a first connecting hole, a first through hole, a second through hole, an electric push rod, a disk and a butt joint hole. According to the medicine quantitative output structure on the medical electronic medicine dispensing equipment, the support driving structure utilizes the electric push rod to realize the up-and-down stretching of the connecting structure and the extrusion output structure, so that the depth of the extrusion output structure entering the interior of the injection tube is regulated and controlled, the quantitative output is realized, and the extrusion output structure is convenient to extrude the injection tube.)

1. The utility model provides a medicine ration output structure on medical electron medicine dispensing device which characterized in that: including depositing cartridge case (1), the lower extreme of depositing cartridge case (1) is connected with support drive structure (2), and the lower extreme of depositing cartridge case (1) is connected with connection structure (3), the lower extreme of connection structure (3) is connected with extrusion output structure (4), and the lower extreme of extrusion output structure (4) is connected with injection tube (5), fixed connection between injection tube (5) and the support drive structure (2), feed inlet (6) have been seted up to the upper end of depositing cartridge case (1).

2. The quantitative medicine output structure on the medical electronic medicine dispensing device according to claim 1, characterized in that: support drive structure (2) including supporting disk (201), first connecting hole (202), first through-hole (203), second through-hole (204), electric putter (205), disc (206), butt joint hole (207), and the department has seted up first connecting hole (202) in the middle of the upper end of supporting disk (201), the upper end edge of supporting disk (201) is provided with first through-hole (203), second through-hole (204), and first through-hole (203) drill way department plug-in connection has electric putter (205), the lateral wall of electric putter (205) is provided with disc (206), and the lateral wall lower part of electric putter (205) has seted up butt joint hole (207), disc (206) and electric putter (205) an organic whole set up, and disc (206) terminal surface edge has seted up the screw hole.

3. The medicine quantitative output structure on the medical electronic medicine dispensing device according to claim 2, characterized in that: the first connecting hole (202) formed in the supporting disc (201) is aligned to a lower end cylinder of the medicine storage cylinder (1), the supporting disc (201) is connected with the medicine storage cylinder (1) through threads, a threaded hole is formed in the hole opening of the first through hole (203), and a threaded hole formed in the end face of the disc (206) is aligned to a threaded hole formed in the edge of the upper end of the supporting disc (201).

4. The medicine quantitative output structure on the medical electronic medicine dispensing device according to claim 3, characterized in that: connection structure (3) include sleeve pipe (301), screw thread running-on (302), hose (303), first discharge orifice (304), fixed pipe (305), first fixed disk (306), connecting rod (307), jack (308), and screw thread running-on (302) have been seted up to the upper end of sleeve pipe (301), the lower extreme of sleeve pipe (301) is provided with hose (303), and the lower extreme of hose (303) is provided with fixed pipe (305), first discharge orifice (304) are seted up to hose (303), fixed pipe (305), and the lower extreme of fixed pipe (305) is provided with first fixed disk (306), the lateral wall of first fixed disk (306) is provided with connecting rod (307), and jack (308) have been seted up to the rod end of connecting rod (307).

5. The medicine quantitative output structure on the medical electronic medicine dispensing device according to claim 4, characterized in that: the sleeve pipe (301), the hose (303), the fixed pipe (305), the first fixed disk (306) and the connecting rod (307) are integrally arranged, a threaded sleeve opening (302) formed in the upper end of the sleeve pipe (301) is aligned to a lower end cylinder of the medicine storage cylinder (1), the sleeve pipe (301) is connected with the medicine storage cylinder (1) through threads, a threaded hole is formed in the hole wall of the inserting hole (308), and the connecting rod (307) is connected with the electric push rod (205) through a bolt.

6. The medicine quantitative output structure on the medical electronic medicine dispensing device according to claim 5, characterized in that: extrusion output structure (4) are including extrusion pipe (401), second fixed disk (402), second discharge orifice (403), wire guide (404), seal groove (405), sealing washer (406), solenoid valve (407), and the upper end of extrusion pipe (401) is provided with second fixed disk (402), second discharge orifice (403) have been seted up to the upper end of extrusion pipe (401), and the pore wall of second discharge orifice (403) is provided with the projection, wire guide (404) have been seted up to the pipe wall of extrusion pipe (401), the lower extreme drill way of second discharge orifice (403) is provided with solenoid valve (407), seal groove (405) have been seted up to the lateral wall lower part of extrusion pipe (401), and the inslot of seal groove (405) has cup jointed sealing washer (406).

7. The medicine quantitative output structure on the medical electronic medicine dispensing device according to claim 6, characterized in that: the extrusion pipe (401) and the second fixed disk (402) are integrally arranged, the upper end of the second fixed disk (402) is in contact with the first fixed disk (306), and the edge of the end face of the second fixed disk (402) is provided with a threaded hole which is aligned with the edge of the end face of the first fixed disk (306).

8. The quantitative medicine output structure on the medical electronic medicine dispensing device according to claim 7, wherein: the injection cylinder (5) comprises a cylinder (501), a medicine hole (502), a protruding strip (503), a screw hole (504), a screw rod (505) and a nut (506), the medicine hole (502) is formed in the upper end of the cylinder (501), the protruding strip (503) is arranged on the side wall of the upper end of the cylinder (501), the screw hole (504) is formed in the upper end of the protruding strip (503), the screw rod (505) is inserted into the screw hole (504), the lower end of the screw rod (505) penetrates through the protruding strip (503) to be connected with the nut (506), and the upper end of the screw rod (505) penetrates through the second through hole (204) to be connected with the nut (506.

Technical Field

The invention relates to the field of medical electronic medicine distribution equipment, in particular to a medicine quantitative output structure on the medical electronic medicine distribution equipment.

Background

Pharmaceutical analysis is a subject of chemical, physical, biological and microbiological studies to study chemical tests of drugs, drug stability, bioavailability, clinical monitoring of drugs and qualitative and quantitative determination of active ingredients of herbs. The method comprises chemical inspection of finished medicine, quality control in the medicine production process, quality inspection in the medicine storage process, clinical medicine analysis, in-vivo medicine analysis and the like, wherein the in-vivo medicine analysis is a subject derived from the medicine analysis school. The method obtains various parameters and transformation of pharmacokinetics, metabolic mode, pathway and other information by analyzing the concentration of the medicine and metabolites thereof in human or animal body fluid and various tissues and organs and knowing the change of the quantity and quality of the medicine in vivo, thereby being beneficial to the research, clinical reasonable application and the like of the medicine, and the medicine analysis needs to carry out the quantitative output of the medicine to a patient for analysis; in the use, the manual formula of original adoption exports, leads to the output volume to be inaccurate, and the result of use is not good.

Disclosure of Invention

The invention mainly aims to provide a medicine quantitative output structure on medical electronic medicine dispensing equipment, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a medicine ration output structure on medical electron medicine dispensing device, is including depositing the cartridge case, the lower extreme of depositing the cartridge case is connected with the support drive structure, and the lower extreme of depositing the cartridge case is connected with connection structure, connection structure's lower extreme is connected with extrusion output structure, and extrudees output structure's lower extreme and is connected with the injection tube, fixed connection between injection tube and the support drive structure, the feed inlet has been seted up to the upper end of depositing the cartridge case.

Preferably, the support drive structure includes supporting disk, first connecting hole, first through-hole, second through-hole, electric putter, disc, butt joint hole, and the department has seted up first connecting hole in the middle of the upper end of supporting disk, the upper end edge of supporting disk is provided with first through-hole, second through-hole, and first through-hole mouth department inserts and is connected with electric putter, electric putter's lateral wall is provided with the disc, and electric putter's lateral wall lower part has seted up the butt joint hole, disc and electric putter are integrative to be set up, and disc terminal surface edge sets up threaded hole.

Preferably, the first connecting hole formed in the supporting disk is aligned with the lower end cylinder of the medicine storage barrel, the supporting disk is connected with the medicine storage barrel through threads, a threaded hole is formed in the position of the first through hole, and the threaded hole formed in the end face of the disk and the threaded hole formed in the edge of the upper end of the supporting disk are aligned.

Preferably, connection structure includes sleeve pipe, screw thread running-on, hose, first discharge orifice, fixed pipe, first fixed disk, connecting rod, jack, and the screw thread running-on has been seted up to sheathed tube upper end, the sheathed tube lower extreme is provided with the hose, and the lower extreme of hose is provided with fixed pipe, the first discharge orifice of hole formation is seted up to hose, fixed pipe, and the lower extreme of fixed pipe is provided with first fixed disk, the lateral wall of first fixed disk is provided with the connecting rod, and the jack has been seted up to the rod end of connecting rod.

Preferably, sleeve pipe, hose, fixed pipe, first fixed disk, connecting rod are integrative to be set up, and the screw thread running-on that the sleeve pipe upper end was seted up is aimed at and is deposited cartridge case lower extreme cylinder, the sleeve pipe is connected with depositing the cartridge case through the screw thread, the screw hole is seted up to the jack pore wall, and connecting rod and electric putter are connected through the bolt.

Preferably, the extrusion output structure includes extrusion pipe, second fixed disk, second discharge orifice, wire guide, seal groove, sealing washer, solenoid valve, and the upper end of extrusion pipe is provided with the second fixed disk, the second discharge orifice has been seted up to the upper end of extrusion pipe, and the pore wall in second discharge orifice is provided with the projection, the wire guide has been seted up to the pipe wall of extrusion pipe, the lower extreme drill way in second discharge orifice is provided with the solenoid valve, the seal groove has been seted up to the lateral wall lower part of extrusion pipe, and the inslot of seal groove has cup jointed the sealing washer.

Preferably, the extrusion pipe and the second fixed disk are integrally arranged, the upper end of the second fixed disk contacts the first fixed disk, and the edge of the end face of the second fixed disk is provided with a threaded hole which is aligned with the edge of the end face of the first fixed disk.

Preferably, the injection tube comprises a needle cylinder, a medicine hole, a convex strip, a screw hole, a screw rod and a nut, the medicine hole is formed in the upper end of the needle cylinder, the convex strip is arranged on the side wall of the upper end of the needle cylinder, the screw hole is formed in the upper end of the convex strip, the screw rod is inserted into the screw hole and connected with the screw rod, the lower end of the screw rod penetrates through the convex strip and is connected with the nut, and the upper end of the screw rod penetrates through the.

Compared with the prior art, the invention has the following beneficial effects: medicine ration output structure on this medical electron divides medicine equipment:

the support driving structure utilizes the electric push rod to realize the up-and-down extension of the connecting structure and the extrusion output structure, so that the depth of the extrusion output structure entering the interior of the injection tube is regulated and controlled, the quantitative output is realized, and the injection tube is fixedly connected with the support driving structure through the screw rod, so that the extrusion output structure can conveniently extrude the injection tube;

medicine ration output structure on whole medical electron divides medicine equipment simple structure, convenient operation, the effect of use is better for traditional mode.

Drawings

Fig. 1 is a schematic overall structure diagram of a quantitative drug output structure of a medical electronic dispensing device according to the present invention;

FIG. 2 is a schematic diagram showing the whole structure of the quantitative drug output structure of the medical electronic dispensing device according to the present invention;

FIG. 3 is a sectional view of a supporting driving structure of a quantitative drug output structure of a medical electronic dispensing device according to the present invention;

FIG. 4 is a sectional view of the connection structure of the quantitative drug output structure of the medical electronic dispensing device according to the present invention;

FIG. 5 is a sectional view of an extrusion output structure of a quantitative drug output structure of a medical electronic dispensing device according to the present invention;

fig. 6 is a schematic view of an injection cylinder of a quantitative drug output structure of a medical electronic dispensing device according to the present invention.

In the figure: 1. storing the medicine box; 2. supporting the drive structure; 201. a support disc; 202. a first connection hole; 203. a first through hole; 204. a second through hole; 205. an electric push rod; 206. a disc; 207. a butt joint hole; 3. a connecting structure; 301. a sleeve; 302. threading a sleeve opening; 303. a hose; 304. a first flow aperture; 305. a fixed tube; 306. a first fixed disk; 307. a connecting rod; 308. a jack; 4. an extrusion output structure; 401. extruding the tube; 402. a second fixed disk; 403. a second flow aperture; 404. a wire guide hole; 405. a sealing groove; 406. a seal ring; 407. an electromagnetic valve; 5. an injection tube; 501. a needle cylinder; 502. medicine holes; 503. a convex strip; 504. a screw hole; 505. a screw; 506. a nut; 6. and (4) feeding a material inlet.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-6, a medicine quantitative output structure on a medical electronic medicine dispensing device comprises a medicine storage case 1, a supporting driving structure 2 is connected to the lower end of the medicine storage case 1, a connecting structure 3 is connected to the lower end of the medicine storage case 1, an extrusion output structure 4 is connected to the lower end of the connecting structure 3, an injection tube 5 is connected to the lower end of the extrusion output structure 4, the injection tube 5 is fixedly connected to the supporting driving structure 2, and a feeding hole 6 is formed in the upper end of the medicine storage case 1.

The supporting driving structure 2 comprises a supporting plate 201, a first connecting hole 202, a first through hole 203, a second through hole 204, an electric push rod 205, a disc 206 and a butt-joint hole 207, wherein the first connecting hole 202 is formed in the middle of the upper end of the supporting plate 201, the first through hole 203 and the second through hole 204 are formed in the edge of the upper end of the supporting plate 201, the electric push rod 205 is inserted and connected into the hole of the first through hole 203, the disc 206 is arranged on the side wall of the electric push rod 205, the butt-joint hole 207 is formed in the lower portion of the side wall of the electric push rod 205, the disc 206 and the electric push rod 205 are integrally arranged, and a threaded; the supporting driving structure 2 utilizes the electric push rod 205 to realize the up-and-down extension of the connecting structure 3 and the extrusion output structure 4, so that the depth of the extrusion output structure 4 entering the injection tube 5 is regulated and controlled, and the quantitative output is realized.

Wherein, the first connecting hole 202 that supporting disk 201 was seted up is aimed at and is deposited 1 lower extreme cylinders of cartridge case, and supporting disk 201 is connected with depositing cartridge case 1 through the screw thread, and first through-hole 203 drill way department sets up threaded hole, and the screw hole that 206 terminal surface of disc was seted up and the screwed hole that supporting disk 201 upper end edge was seted up set up in alignment.

The connecting structure 3 includes a sleeve 301, a threaded socket 302, a hose 303, a first flow hole 304, a fixed pipe 305, a first fixed disk 306, a connecting rod 307, and a jack 308, wherein the threaded socket 302 is opened at the upper end of the sleeve 301, the hose 303 is provided at the lower end of the sleeve 301, the fixed pipe 305 is provided at the lower end of the hose 303, the first flow hole 304 is formed by opening holes of the hose 303 and the fixed pipe 305, the first fixed disk 306 is provided at the lower end of the fixed pipe 305, the connecting rod 307 is provided at the side wall of the first fixed disk 306, and the jack 308 is provided at the rod end of the connecting rod 307.

The sleeve 301, the hose 303, the fixing tube 305, the first fixing disc 306 and the connecting rod 307 are integrally arranged, the threaded sleeve opening 302 formed in the upper end of the sleeve 301 is aligned with a cylinder at the lower end of the cartridge storage case 1, the sleeve 301 is connected with the cartridge storage case 1 through threads, a threaded hole is formed in the hole wall of the insertion hole 308, and the connecting rod 307 is connected with the electric push rod 205 through a bolt.

The extrusion output structure 4 includes an extrusion tube 401, a second fixed disk 402, a second flow hole 403, a wire guide 404, a sealing groove 405, a sealing ring 406 and an electromagnetic valve 407, the upper end of the extrusion tube 401 is provided with the second fixed disk 402, the upper end of the extrusion tube 401 is provided with the second flow hole 403, the hole wall of the second flow hole 403 is provided with a convex column, the pipe wall of the extrusion tube 401 is provided with the wire guide 404, the lower end orifice of the second flow hole 403 is provided with the electromagnetic valve 407, the lower part of the side wall of the extrusion tube 401 is provided with the sealing groove 405, and the sealing ring 406 is sleeved in the groove of the sealing.

The extrusion pipe 401 and the second fixed disk 402 are integrally arranged, the upper end of the second fixed disk 402 contacts the first fixed disk 306, and the edge of the end face of the second fixed disk 402 is provided with a threaded hole which is aligned with the edge of the end face of the first fixed disk 306.

The injection cylinder 5 comprises a needle cylinder 501, a medicine hole 502, a convex strip 503, a screw hole 504, a screw rod 505 and a nut 506, the medicine hole 502 is formed in the upper end of the needle cylinder 501, the convex strip 503 is arranged on the side wall of the upper end of the needle cylinder 501, the screw hole 504 is formed in the upper end of the convex strip 503, the screw rod 505 is inserted and connected into the screw hole 504, the lower end of the screw rod 505 penetrates through the convex strip 503 and is connected with the nut 506, and the upper end of the screw rod 505 penetrates through the second through hole; the injection tube 5 is fixedly connected with the support driving structure 2 through the screw 505, so that the output structure 4 can be conveniently extruded to extrude the injection tube 5.

It should be noted that, when assembling the medicine storage cartridge 1, the supporting driving structure 2, the connecting structure 3, the extrusion output structure 4, and the injection cartridge 5, the lower end of the electric push rod 205 of the supporting driving structure 2 is inserted in alignment with the first through hole 203 formed on the upper edge of the supporting disc 201 until the disc 206 disposed on the side wall of the electric push rod 205 contacts the upper end of the supporting disc 201, the disc 206 is rotated to the position of the threaded hole formed on the end surface of the adjusting disc 206, the threaded hole formed on the end surface of the disc 206 is aligned with the threaded hole formed on the upper edge of the supporting disc 201, the bolt is inserted into the threaded hole formed on the end surface of the disc 206 to realize the fixed connection between the electric push rod 205 and the supporting disc 201, the first connecting hole 202 formed in the middle of the upper end of the supporting disc 201 is aligned with the cylinder at the lower end of the medicine, the sleeve 301, the hose 303, the fixing pipe 305 and the first fixing plate 306 arranged on the connecting structure 3 are integrally arranged, a threaded sleeve opening 302 arranged on the sleeve 301 is communicated with the hose 303 and a first flow hole 304 arranged on the fixing pipe 305, the threaded sleeve opening 302 arranged on the upper end of the sleeve 301 is aligned with the lower end column of the cartridge storage 1, the sleeve 301 is connected with the cartridge storage 1 through threads, a connecting rod 307 arranged on the connecting structure 3 is integrally arranged with the first fixing plate 305, a jack 308 arranged on the connecting rod 307 is aligned with the lower end rod head of the electric push rod 205, the lower end rod head of the electric push rod 205 is inserted into the jack 308, a threaded hole arranged on the side wall of the electric push rod 205 is aligned with a threaded hole arranged on the wall of the jack 308, a bolt is inserted into the threaded hole arranged on the wall of the jack 308, the bolt penetrates through the jack 308 to be arranged with, a convex column is arranged on the inner wall of an extrusion pipe 401 arranged in the extrusion output structure 4, a wire hole 404 is arranged on the side wall of the convex column, an electromagnetic valve 407 is arranged at the lower end orifice of a second flow hole 403 arranged in the extrusion pipe 401, a wire of the electromagnetic valve 407 is inserted into the wire hole 404, the wire of the electromagnetic valve 407 penetrates through the side wall of a second fixed disc 402 along the wall of the wire hole 404 and is arranged at a notch, the second fixed disc 402 and the extrusion pipe 401 are integrally arranged, the upper end surface of the second fixed disc 402 contacts with a first fixed disc 306 at the lower end of the connection structure 3, the position of adjusting the end surface edge of the second fixed disc 402 to be provided with a threaded hole is rotated until the end surface edge of the second fixed disc 402 is provided with a threaded hole and the end surface edge of the first fixed disc 306 is provided with a threaded hole, a bolt is inserted into the end surface of the second fixed disc 402 and is, the electromagnetic valve 407 extends out of a lead wire and penetrates through the end face of the connecting rod 307 to be connected with an upper end part of the supporting plate 201, a needle cylinder 501 and a convex strip 503 arranged on the injection cylinder 5 are integrally arranged, the upper end of a screw rod 505 arranged on the injection cylinder 5 is inserted in alignment with a second through hole 204 arranged on the lower end edge of the supporting plate 201, the screw rod 505 is rotated, the upper end of the screw rod 505 penetrates through the second through hole 204 arranged on the supporting plate 201 and is connected with a nut 506, the screw rod 505 and the supporting plate 201 are fixed, the lower end of the screw rod 505 is inserted in alignment with a screw hole 504 arranged on the convex strip 503, the screw rod 505 is rotated, the screw rod 505 penetrates through the screw hole 504 arranged on the convex strip 503 and is connected with the nut 506, so as to realize the fixed connection between the needle cylinder 501 and the supporting plate 201, a medicine hole 502 arranged on the upper end of the, the lower end of the extrusion tube 401 is inserted into the orifice of the medicine hole 502 formed at the upper end of the needle cylinder 501, after the connection of the whole structure is realized, when the device is used, the medicine storage cylinder 1 is fed through the feed inlet 6, the storage liquid in the medicine storage cylinder 1 enters the orifice of the second flow hole 403 formed in the extrusion tube 401 through the connecting structure 3, the electromagnetic valve 407 is electrically connected with an external switch, after the electromagnetic valve 407 is opened, the storage liquid enters the medicine hole 502 formed at the upper end of the needle cylinder 501, the electromagnetic valve 407 is closed, the electric push rod 205 is connected with external equipment through a lead, the electric push rod 205 stretches downwards, the electric push rod 205 pushes the connecting rod 307 of the connecting structure 3, during the downward movement of the connecting rod 307, the connecting rod 307 drives the hose 303 to stretch, during the downward movement of the lower end of the connecting rod 307, the extrusion tube 401 moves downwards during the downward, when the extrusion tube 401 is extruded into the hole of the needle cylinder 501 provided with the medicine hole 502, the lower end of the needle cylinder 501 is provided with a hole to discharge medicine, and the quantitative output is realized by the downward extending height of the electric push rod 205, thereby being convenient for a user to use.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.