阅读说明：本技术 一种恒温二级墨盒 (Constant temperature second grade ink horn ) 是由 单健 王家远 闫峂 脱占贺 单川 于 2021-07-30 设计创作，主要内容包括：本发明涉及一种恒温二级墨盒,包括二级墨盒本体,所述二级墨盒本体的至少一侧面设有墨腔,用于容置供给打印喷头的墨水；所述二级墨盒本体的设有墨腔的一侧外部盖合有盖板,所述盖板的内侧设有凹槽,所述盖板与所述二级墨盒本体盖合后使得所述凹槽形成独立的容置腔,所述容置腔具有一个起始端和终止端,所述起始端与恒温水循环系统的出水口相连通,所述终止端与恒温水循环系统的进水口相连通,使得容置腔内形成单向的水流通道,所述墨腔内设有温度传感器,用于检测容置腔内水流的温度,温度传感器与恒温水循环系统相连。本发明本发明提供的一种恒温二级墨盒,设计巧妙,具有恒温效果好、体积小、重量轻、使用寿命长、成本低的有益效果。(The invention relates to a constant-temperature secondary ink box, which comprises a secondary ink box body, wherein at least one side surface of the secondary ink box body is provided with an ink cavity for accommodating ink supplied to a printing nozzle; the utility model discloses a temperature sensor, including second grade ink horn body, recess, initial end and thermostatic water circulation system, the outside lid in one side that is equipped with the china ink chamber of second grade ink horn body has closed the apron, the inboard of apron is equipped with the recess, the apron with make after second grade ink horn body lid closes the recess forms independent holding chamber, the holding chamber has an initiating terminal and ends, the initiating terminal is linked together with thermostatic water circulation system's delivery port, it is linked together with thermostatic water circulation system's water inlet to end for the holding intracavity forms one-way rivers passageway, the china ink intracavity is equipped with temperature sensor for detect the temperature of holding intracavity rivers, temperature sensor links to each other with thermostatic water circulation system. The constant-temperature two-stage ink box provided by the invention is ingenious in design, and has the beneficial effects of good constant-temperature effect, small volume, light weight, long service life and low cost.)

1. A constant temperature two-stage ink box is characterized in that: the ink box comprises a secondary ink box body (1), wherein an ink cavity is formed in the side surface of the secondary ink box body (1) and is used for containing ink supplied to a printing nozzle; the one side outside lid that is equipped with the china ink chamber of second grade ink horn body (1) has closed apron (2), the inboard of apron (2) is equipped with recess (21), apron (2) with make after second grade ink horn body (1) lid closes recess (21) form independent holding chamber, the holding chamber has a initiating terminal and ends, the initiating terminal is linked together with constant temperature water circulation system's delivery port, it is linked together with constant temperature water circulation system's water inlet to end, makes the holding intracavity forms one-way rivers passageway, the china ink intracavity is equipped with temperature sensor (4) for detect the temperature of china ink intracavity ink.

2. The thermostatic secondary cartridge of claim 1, wherein: second grade ink horn body (1) is including box body (11), the side of box body (11) is equipped with ink groove (111), ink groove (111) outside lid has closed ink box lid (12), ink groove (111) with ink box lid (12) lid forms independent china ink chamber after closing, the outside of ink box lid (12) with apron (2) cover each other and close.

3. The thermostatic secondary cartridge of claim 2, wherein: the number of china ink groove (111) is two and is located respectively the both sides of box body (11), two china ink groove (111) outside all has covered china ink box lid (12), two china ink groove (111) with china ink box lid (12) lid forms two mutually independent china ink chambeies after closing, apron (2) set up in the both sides of second grade ink horn body (1) and respectively with two the outside of china ink box lid (12) is covered mutually and is closed.

4. A thermostatic secondary cartridge according to claim 2 or 3, characterized in that: the box body (11) and the cover plate (2) are made of non-metal materials, and the ink box cover (12) is made of metal materials.

5. The thermostatic secondary cartridge of claim 4, wherein: the ink box cover (12) is provided with a water inlet channel and a water outlet channel which are respectively communicated with the starting end and the terminating end of the accommodating cavity, the water inlet channel is communicated with a water outlet of the constant-temperature water circulating system, and the water outlet channel is communicated with a water inlet of the constant-temperature water circulating system.

6. The thermostatic secondary cartridge of claim 1, wherein: a sealing ring (3) is arranged between the periphery of the groove (21) and the secondary ink box body (1), and a groove for containing the sealing ring (3) is formed in the inner side of the cover plate (2).

7. The thermostatic secondary cartridge of claim 4, wherein: four side parts of the outer side surface of the cover plate (2) are provided with a plurality of counter bores (22) and a plurality of through holes (23), and the counter bores (22) and the through holes (23) are arranged in a crossed mode.

8. The thermostatic secondary cartridge of claim 7, wherein: the ink box cover (12) is provided with a through hole (23) corresponding to the counter bore (22) on the cover plate (2) and a threaded hole (123) corresponding to the through hole (23) on the cover plate (2), and the box body (11) is provided with a through hole (23) corresponding to the threaded hole (123) and the through hole (23) on the ink box cover (12).

9. The thermostatic secondary cartridge of claim 1, wherein: the grooves (21) are labyrinth or annular and are uniformly arranged on the inner side of the cover plate (2).

10. A thermostatic secondary cartridge according to any one of claims 1 to 9 wherein: the secondary ink box body (1) and the cover plate (2) are covered to form a flat cubic shape.

Technical Field

The invention relates to the technical field of ink-jet printing equipment, in particular to a constant-temperature secondary ink box.

Background

When the ink-jet printer works normally, the ink-jet printer has higher requirements on the working temperature of ink, the working temperature of the ink is generally 23-26 ℃, when the temperature is too high, the ink is easy to volatilize, so that the ink is easy to dry, when the temperature is too low, the fluidity of the ink is poor, and the two conditions can cause the ink outlet of the nozzle to be poor, so that the printing quality is influenced.

In order to solve the above problems, in the prior art, a heating and cooling device is added to the secondary ink cartridge to make the ink supplied to the print head by the secondary ink cartridge at a proper temperature. The temperature-regulating ink box of the inkjet printer, which is disclosed by the Chinese patent CN202088668U, comprises an aluminum alloy box body, a box cover, an ink input pipe and a conveying pipe which are arranged on a spray head trolley, wherein the box body is internally provided with more than four independent cavities which are arranged in a straight line, a cooling component is arranged below the box body, a heat radiation component and a heating component are arranged on the side edge of the box body, a temperature measuring probe is arranged on the box body, and the cooling component, the heat radiation component, the heating component and the temperature measuring probe are electrically connected with a temperature controller.

Although the temperature that can control the ink in the second grade ink horn of above-mentioned prior art is in invariable within range, but set up cooling component, radiator unit and heating element around the second grade ink horn, increased the volume and the weight of second grade ink horn, when printing required ink kind when many, need install a plurality of second grade ink horns, this can make holistic volume of shower nozzle dolly and weight increase, influence the stability of dolly motion, and then influence the printing quality.

Disclosure of Invention

The invention aims to provide a constant-temperature two-stage ink box to solve the defects in the prior art, and the technical problem to be solved by the invention is realized by the following technical scheme.

A constant-temperature secondary ink box comprises a secondary ink box body, wherein an ink cavity is formed in the side face of the secondary ink box body and used for containing ink supplied to a printing nozzle; the utility model discloses a temperature sensor, including two grade ink horn bodies, one side outside lid that is equipped with the china ink chamber of two grade ink horn bodies has closed the apron, the inboard of apron is equipped with the recess, the apron with make after two grade ink horn bodies lid closes the recess forms independent holding chamber, the holding chamber has an initiating terminal and terminates the end, the initiating terminal is linked together with constant temperature water circulation system's delivery port, it is linked together with constant temperature water circulation system's water inlet to terminate the end, makes the holding intracavity forms one-way rivers passageway, the china ink intracavity is equipped with temperature sensor for detect the temperature of china ink intracavity ink.

Preferably, the secondary ink box body comprises a box body, an ink groove is formed in the side face of the box body, an ink box cover covers the outer portion of the ink groove, an independent ink cavity is formed after the ink groove and the ink box cover are covered, and the outer side of the ink box cover and the cover plate are mutually covered.

Preferably, the number of the ink grooves is two and the two ink grooves are respectively located on two sides of the box body, two ink box covers are covered outside the ink grooves, two ink grooves and the ink box covers form two mutually independent ink cavities, and the cover plates are arranged on two sides of the two-stage ink box body and are respectively covered with two outer sides of the ink box covers.

Preferably, the case body and the cover plate are made of a non-metal material, and the cartridge cover is made of a metal material.

Preferably, the ink box cover is provided with a water inlet channel and a water outlet channel which are respectively communicated with the starting end and the terminating end of the accommodating cavity, the water inlet channel is communicated with a water outlet of the constant-temperature water circulating system, and the water outlet channel is communicated with a water inlet of the constant-temperature water circulating system.

Preferably, a sealing ring is arranged between the periphery of the groove and the secondary ink box body, and a groove for accommodating the sealing ring is formed in the inner side of the cover plate.

Preferably, a plurality of counter bores and a plurality of through holes are formed in four side portions of the outer side face of the cover plate, and the counter bores and the through holes are arranged in a crossed mode.

Preferably, the ink box cover is respectively provided with a through hole corresponding to the counter bore on the cover plate and a threaded hole corresponding to the through hole on the cover plate, and the box body is provided with a through hole corresponding to the threaded hole and the through hole on the ink box cover.

Preferably, the grooves are labyrinth or circumferential and are uniformly arranged on the inner side of the cover plate.

Preferably, the secondary ink box body and the cover plate are covered to form a flat cubic shape.

The invention has the following beneficial effects:

1) the constant temperature effect is good, the volume is small, and the weight is light; the ink cavity is arranged on the side surface of the secondary ink box body, so that the whole ink cavity is of a flat structure, the heat exchange between the ink in the flat ink cavity and the constant-temperature water in the groove can be more efficient and uniform, a good constant-temperature effect is achieved, and the space can be saved; the inner side of the cover plate is provided with a groove, and after the groove is communicated with a constant-temperature water circulating system, constant-temperature water is introduced into the groove, so that the heat capacity of the water is larger, and the constant-temperature effect is better; the constant-temperature water circulating system is arranged at other positions outside the printing trolley, so that the space of the printing trolley is not occupied; the two sides of the secondary ink box body are provided with the ink cavities, namely one secondary ink box body can contain two kinds of ink, when the types of the ink needed by printing are more, the number of the secondary ink box body can be halved, the occupied space of the secondary ink box is effectively saved, and the weight of a printing trolley is reduced; the box body and the cover plate are made of nonmetal materials, and the ink box cover is made of metal materials, so that the weight of the secondary ink box is reduced to the maximum extent while the assembling quality is ensured; the ink box cover is made of a metal material, so that the heat exchange efficiency between constant-temperature water and ink can be improved, the cover plate is made of a nonmetal material, external heat can be prevented from being conducted inwards, the phenomenon that condensed water drops appear due to the fact that the temperature of the constant-temperature water is transmitted to the surface of the cover plate can be avoided, and the constant-temperature effect is good; the constant temperature device has the beneficial effects of good constant temperature effect, small volume and light weight;

2) the assembly quality is high, the service life is long, and the cost is low; the box body and the cover plate are made of nonmetal materials, the ink box cover is made of metal materials, if threaded holes are processed in the box body and the cover plate made of nonmetal materials, soft and hard matching formed in the threaded holes made of nonmetal materials by metal material screws can easily cause the generation of matching gaps, so that the sealing performance of an ink cavity and an accommodating cavity is influenced, and leakage of ink and constant temperature water is caused, and connectors required by an ink path and a water circulation path are arranged on the nonmetal parts, so that the connectors are loosened after bumping in the transportation process or long-term use, and the problem of liquid leakage is caused, and the groove, the ink groove, the groove and the like are processed on parts made of metal materials with great difficulty and high cost, so that the threaded holes, the connectors and the channel are arranged on the ink box cover made of metal materials, and the groove, the ink groove and the groove are respectively arranged on the cover plate and the box body made of nonmetal materials, the fixing strength of threaded connection and the service life of the joint can be guaranteed, and the processing cost can be reduced.

In conclusion, the constant-temperature two-stage ink box provided by the invention is ingenious in design, and has the beneficial effects of good constant-temperature effect, small size, light weight, long service life and low cost.

Drawings

FIG. 1 is a schematic illustration of an explosive structure according to the present invention;

FIG. 2 is an exploded view of the secondary ink cartridge body of the present invention;

FIG. 3 is a front view of the cover of the ink box of the present invention;

FIG. 4 is a schematic cross-sectional view of a cover of the ink cartridge of the present invention;

FIG. 5 is a schematic view of the cross-sectional structure A-A of FIG. 3;

FIG. 6 is a schematic perspective view of a cover plate according to the present invention;

the reference numbers in the drawings are, in order: 1. the ink box comprises a secondary ink box body, 11, a box body, 111, an ink groove, 12, an ink box cover, 121, a water outlet channel, 122, a water inlet channel, 123, a threaded hole, 2, a cover plate, 21, a groove, 211, a termination end, 212, a starting end, 22, a counter bore, 23, a through hole, 3, a sealing ring, 4 and a temperature sensor.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1:

referring to fig. 1, 2 and 6, a constant temperature secondary ink cartridge is improved in that: the ink box comprises a secondary ink box body 1, wherein an ink cavity is formed in the side surface of the secondary ink box body 1 and is used for containing ink supplied to a printing nozzle; the one side outside lid that is equipped with the china ink chamber of second grade ink horn body 1 has closed apron 2, the inboard of apron 2 is equipped with recess 21, apron 2 with make after the lid of second grade ink horn body 1 closes recess 21 forms independent holding chamber, the holding chamber has an initiating terminal and termination end, the initiating terminal is linked together with constant temperature water circulation system's delivery port, the termination end is linked together with constant temperature water circulation system's water inlet, makes the holding intracavity forms unidirectional rivers passageway, the china ink intracavity is equipped with temperature sensor 4 for detect the temperature of the interior ink of china ink chamber.

In the embodiment, the second-stage ink box body 1 is arranged on the printing trolley, the cover plate 2 covers the outer part of one side of the second-stage ink box body 1, which is provided with the ink cavity, the groove 21 is arranged on the inner side of the cover plate 2, constant-temperature water is introduced into the groove 21 after the groove 21 is communicated with the constant-temperature water circulating system, the heat capacity of the water is larger, and the constant-temperature effect is better; the ink cavity is arranged on the side surface of the secondary ink box body 1, so that the whole ink cavity is of a flat structure, the heat exchange between the ink in the flat ink cavity and the constant-temperature water in the groove 21 is more efficient and uniform, a good constant-temperature effect is achieved, and the space can be saved; the ink chamber is internally provided with a temperature sensor 4 for detecting the temperature of the ink and feeding back the temperature to the constant temperature water circulation system, the constant temperature water circulation system adjusts the temperature of the water introduced into the groove according to the temperature of the ink, and the constant temperature water circulation system is arranged at other positions outside the printing trolley and does not occupy the space of the printing trolley. The constant temperature second grade ink horn that this embodiment provided, design benefit both can satisfy the constant temperature requirement of ink, has solved the problem that sets up the volume and the weight increase of second grade ink horn that cooling module, radiator unit and heating element result in simultaneously around the second grade ink horn among the prior art again, has that constant temperature is effectual, small, light in weight's beneficial effect.

Further, a liquid level sensor for detecting the amount of ink is arranged in the ink chamber.

Further, the grooves 21 are labyrinth or circumferential and are uniformly arranged on the inner side of the cover plate 2.

Further, the secondary ink box body 1 and the cover plate 2 are covered to form a flat cube shape.

Example 2:

on the basis of embodiment 1, the secondary ink cartridge body 1 includes a cartridge body 11, an ink tank 111 is disposed on a side surface of the cartridge body 11, an ink tank cover 12 is covered outside the ink tank 111, the ink tank 111 and the ink tank cover 12 are covered to form an independent ink chamber, and an outer side of the ink tank cover 12 and the cover plate 2 are covered with each other.

Further, the number of the ink grooves 111 is two and the two ink grooves are respectively located on two sides of the box body 11, the ink box cover 12 is covered outside the two ink grooves 111, the two ink grooves 111 and the ink box cover 12 are covered to form two mutually independent ink chambers, and the cover plates 2 are arranged on two sides of the two-stage ink box body 1 and are respectively covered with the outer sides of the two ink box covers 12.

Further, the case body 11 and the cover plate 2 are made of a non-metal material, and the cartridge cover 12 is made of a metal material.

Furthermore, the ink box cover 12 is provided with a water inlet channel and a water outlet channel which are respectively communicated with the starting end and the terminating end of the accommodating cavity, the water inlet channel is communicated with a water outlet of the constant temperature water circulating system, and the water outlet channel is communicated with a water inlet of the constant temperature water circulating system.

Further, as shown in fig. 6, the constant temperature water enters from the initial end 212 of the containing cavity, gradually flows upwards from the bottom, and finally flows to the terminal end 211, and since the ink in the secondary ink cartridge body 1 is located below the ink cavity, the constant temperature water initially entering the water tank flows upwards from the lower part, so that the ink in the ink cavity is kept at a constant temperature.

Further, as shown in fig. 3, 4 and 5, the ink box cover 12 is provided with a water inlet channel 122 communicated with the start end 212 of the accommodating cavity and a water outlet channel 121 communicated with the end 211 of the accommodating cavity, the water inlet channel 122 is communicated with the water outlet of the constant temperature water circulation system, and the water outlet channel 121 is communicated with the water inlet of the constant temperature water circulation system, so that a one-way circulating water channel is formed between the accommodating cavity and the constant temperature water circulation system.

Further, a sealing ring 3 is arranged between the periphery of the groove 21 and the secondary ink box body 1, and a groove for accommodating the sealing ring 3 is formed in the inner side of the cover plate 2.

Furthermore, a plurality of counter bores 22 and a plurality of through holes 23 are arranged on four side portions of the outer side surface of the cover plate 2, and the counter bores 22 and the through holes 23 are arranged in a crossed mode.

Furthermore, the cartridge cover 12 is provided with a through hole 23 corresponding to the counter bore 22 on the cover plate 2 and a threaded hole 123 corresponding to the through hole 23 on the cover plate 2, and the cartridge body 11 is provided with the through hole 23 corresponding to the threaded hole 123 and the through hole 23 on the cartridge cover 12.

Further, the box body 11 is made of nylon, and the ink box cover 12 is made of stainless steel.

Further, an air source joint, an ink inlet joint and an ink outlet joint which are communicated with the ink cavity are arranged on the ink box cover 12.

Further, the air source joint, the ink inlet joint and the ink outlet joint are integrally formed with the ink box cover 12. The ink box cover 12 is made of stainless steel, and the joint and the ink box cover 12 are integrally formed, so that the ink leakage at the interface can be avoided, and the service life of the secondary ink box is prolonged; and the ink groove and the water groove are respectively arranged on the box body 11 and the cover plate 2 which are made of nonmetal materials, so that the processing difficulty can be reduced, and the processing cost can be reduced.

Further, an air source channel, an ink inlet channel and an ink outlet channel which are used for communicating the air source joint, the ink inlet joint and the ink outlet joint with the ink cavity are arranged on the ink box cover 12.

Further, the size of the cartridge cover 12 matches the size of the cartridge body 11.

Further, a sealing ring is arranged between the periphery of the ink tank 111 and the ink box cover 12, and a groove for accommodating the sealing ring is arranged on the box body 11.

In the embodiment, the two sides of the secondary ink box body 1 are provided with the ink cavities, namely one secondary ink box body 1 can contain two kinds of ink, when the types of the ink needed by printing are more, the number of the secondary ink box body 1 can be halved, the occupied space of the secondary ink box is effectively saved, and the weight of a printing trolley is reduced;

the box body 11 and the cover plate 2 are made of nonmetal materials, the ink box cover 12 is made of metal materials, if threaded holes are processed on the box body 11 and the cover plate 2 made of nonmetal materials, soft and hard matching formed in the threaded holes made of nonmetal materials by metal material screws can easily cause the generation of a fit clearance, thereby affecting the tightness of the ink cavity and the accommodating cavity, causing the leakage of ink and constant temperature water, and joints required by the ink path and the water circulation path are arranged on nonmetal parts, so that the joints can be loosened after bumping in the transportation process or long-term use, causing the problem of liquid leakage, grooves, ink grooves, grooves and the like are processed on parts made of metal materials with great difficulty and high cost, therefore, in the embodiment, the threaded holes, the joints and the channels are arranged on the ink box cover 12 made of metal materials, the grooves, the ink grooves are respectively arranged on the cover plate 2 and the box body 11 made of nonmetal materials, the fixing strength of threaded connection and the service life of the joint can be ensured, and the processing cost can be reduced; meanwhile, the ink box cover 12 is a flow guide layer, gas and ink are guided into the ink cavity, and constant temperature water is guided into the accommodating cavity, and the ink box cover 12 is made of metal materials, so that the constant temperature water in the accommodating cavity and the ink in the ink cavity can be subjected to efficient heat exchange, and the temperature of the ink can be adjusted more easily; and apron 2 is non-metallic material, play the effect with external isolated heat exchange, because of printing the in-process, because the heat that integrated circuit board work produced and drying device release lead to second grade ink horn ambient temperature higher, non-metallic's apron 2 can effectively the outside heat of separation inwards conduct, the temperature that also can reduce constant temperature water simultaneously transmits the surface that leads to apron 2 and the condensation drop appears, and the condensation drop drips and damages components and parts easily, consequently, in this embodiment box body 11, the setting of apron 2 and 12 different materials of ink horn lid, both can improve assembly quality, and therefore, the cost is reduced, the service life is prolonged, can improve the constant temperature effect again.

When the ink box is installed, a screw penetrates through the through hole 23 on the ink box cover 12 and the through hole 23 on the box body 11 from the counter bore 22 on the outer side of the cover plate 2 on one side in sequence and is in threaded connection with the threaded hole 123 on the ink box cover 12 on the other side; similarly, on the other side, the screw sequentially passes through the counter bore on the cover plate 2, the through hole 23 on the ink box cover 12 and the through hole 23 on the box body 11, and finally the threaded hole 123 on the ink box cover 12 is in threaded connection; the thread fixing strength is effectively ensured by the mode of double-side cross thread connection, and the connection tightness among the cover plate 2, the ink box cover 12 and the box body 11 is ensured;

the embodiment ingeniously utilizes different materials of the components, and the weight of the secondary ink box is reduced to the maximum extent while the assembly quality is guaranteed, the service function life is prolonged, the cost is reduced, and the constant temperature effect is improved.

It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or otherwise described herein.

Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways, such as by rotating it 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.

In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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.