阅读说明：本技术 低噪打印机 (Low noise printer ) 是由 张学彬 于 2021-11-17 设计创作，主要内容包括：本发明提供了低噪打印机,包括外壳,所述外壳内部设置有出墨机构,所述出墨机构包括储墨盒以及喷墨盒,所述储墨盒与喷墨盒之间连接有下墨管,所述喷墨盒内腔顶部设置有供墨机构,所述喷墨盒底部开设有若干个喷墨口；所述储墨盒通过供墨机构向喷墨盒内间断式供墨,所述喷墨盒内的墨水通过供墨机构与储墨盒内的墨水隔断,降低喷墨盒底部的压强。该出墨机构不仅可储存更多的墨水,且可有效地减少喷墨盒底部发生自流的现象,从而整体实用性更强,该打印机再次打印时,不需要对打印机喷墨口进行清理,操作简单。(The invention provides a low-noise printer which comprises a shell, wherein an ink outlet mechanism is arranged in the shell and comprises an ink storage box and an ink jet box, a lower ink pipe is connected between the ink storage box and the ink jet box, an ink supply mechanism is arranged at the top of an inner cavity of the ink jet box, and a plurality of ink jet ports are formed in the bottom of the ink jet box; the ink storage box supplies ink to the ink jet box intermittently through the ink supply mechanism, and the ink in the ink jet box is separated from the ink in the ink storage box through the ink supply mechanism, so that the pressure at the bottom of the ink jet box is reduced. This go out black mechanism not only can store more ink, and can reduce the phenomenon that the jet-ink box bottom takes place from flowing effectively to whole practicality is stronger, and when this printer printed once more, need not clear up simple operation to the printer ink jet.)

1. Low noise printer, including shell (1), its characterized in that: an ink outlet mechanism (2) is arranged in the shell (1), the ink outlet mechanism (2) comprises an ink storage box (21) and an ink jet box (22), a lower ink pipe (28) is connected between the ink storage box (21) and the ink jet box (22), an ink supply mechanism (26) is arranged at the top of an inner cavity of the ink jet box (22), and a plurality of ink jet ports (210) are formed in the bottom of the ink jet box (22); the ink storage box (21) supplies ink into the ink jet box (22) intermittently through the ink supply mechanism (26), and the ink in the ink jet box (22) is separated from the ink in the ink storage box (21) through the ink supply mechanism (26), so that the pressure at the bottom of the ink jet box (22) is reduced.

2. The low noise printer of claim 1, wherein: the ink supply mechanism (26) comprises a first magnet (261) connected to the top of the inner cavity of the ink jet box (22) and a first floating plate (262) arranged at the bottom of the first magnet (261), a second magnet (263) is connected to the top of the first floating plate (262) at a position corresponding to the first magnet (261), the first magnet (261) is attracted with the second magnet (263) at the corresponding position by magnetic poles, the top of the first floating plate (262) is connected with a sealing cover (264), the sealing cover (264) seals the ink outlet pipe (28), a first ink outlet (267) is formed in the top of the first floating plate (262), the seal cover (264) is arranged on the top of the first ink outlet (267), and does not seal the first ink outlet (267), a second floating plate (265) is arranged at the bottom of the first floating plate (262), and a connecting line (266) is connected between the first floating plate (262) and the second floating plate (265).

3. The low noise printer of claim 1, wherein: a valve (29) is installed on the lower ink pipe (28), and a blocking mechanism (27) is arranged at the bottom of the ink-jet box (22);

the blocking mechanism (27) comprises a movable plate (271) arranged at the bottom of an inner cavity of the ink-jet box (22), the bottom of the movable plate (271) is connected with a plurality of blocking strips (272) corresponding to the ink-jet ports (210), a spring (273) is connected between the movable plate (271) and the bottom of the inner cavity of the ink-jet box (22), two sides of the bottom of the ink-jet box (22) are respectively connected with a telescopic rod (274), telescopic ends of the telescopic rods (274) at two sides are respectively connected with a limiting block (275), a pump body (276) is installed at one side of the ink-jet box (22), an ink absorbing pipe (277) is connected between the pump body (276) and the bottom of the ink-jet box (22), an ink discharging pipe (278) is connected between the pump body (276) and the ink-jet box (21), a pressure relief valve (279) is installed at the top of the ink-jet box (22), and a second ink-discharging port (2710) is arranged at the top of the movable plate (271), notches (2711) are formed in the positions, corresponding to the limiting blocks (275), of the inner walls of the two sides of the ink jet box (22).

4. The low noise printer of claim 2, wherein: the inner cavity of the ink-jet box (22) is vertically connected with a limiting rod, and the limiting rod penetrates through the first floating plate (262), the second floating plate (265) and the movable plate (271).

5. The low noise printer of claim 1, wherein: a driving source (23) is fixedly arranged on one side of the bottom of the ink storage box (21) close to the pump body (276), a mixing mechanism (25) is arranged in the inner cavity of the ink storage box (21), and a transmission mechanism (24) is connected to the bottom of the mixing mechanism (25);

the mixing mechanism (25) comprises a first rotating rod (251) and a second rotating rod (252) which are connected with the ink storage box (21) in a sealing and rotating mode and are arranged on two sides of the ink storage box (21), the outer peripheral surfaces of the first rotating rods (251) on the two sides are connected with packing augers (253), the outer peripheral surfaces of the second rotating rods (252) on the two sides are connected with a plurality of stirring blades (254), the end portion of an output shaft of the driving source (23) is in transmission connection with the first rotating rod (251) on the corresponding position, two sides of the ink storage box (21) are connected with hollow pipes (255), and the packing augers (253) on the two sides are respectively arranged in the hollow pipes (255) on the corresponding positions;

the transmission mechanism (24) comprises chain wheels (241) connected to the bottoms of the first rotating rods (251) on the two sides and the bottoms of the second rotating rods (252) on the two sides, and chains (242) are connected between the chain wheels (241) on the two sides.

6. The low noise printer of claim 1, wherein: and two sides of the bottom of the shell (1) are connected with rubber pads (3).

Technical Field

The invention relates to the technical field of printers, in particular to a low-noise printer.

Background

A printer is one of the output devices of a computer for printing the results of a computer process on an associated medium. The indexes for measuring the quality of the printer comprise three items: print resolution, print speed and noise. There are many types of printers, and an impact printer and a non-impact printer are classified according to whether or not a printing element strikes paper. Full-font character printers and dot matrix character printers are classified according to the character structure to be printed. A line printer is divided into a serial printer and a line printer in such a manner that a line character is formed on a paper. According to the adopted technology, the printer is divided into a column type, a spherical type, an ink jet type, a thermal type, a laser type, an electrostatic type, a magnetic type, a light emitting diode type and the like. Most inkjet printers are currently on the market.

Ink jet printer ink cartridge on the market is less, at the printing in-process, need frequently to annotate the ink in the ink horn, thereby the printing efficiency of printer has been reduced, in order to raise the efficiency, people begin to enlarge the volume of ink cartridge, the ink horn enlarges the back, difference in height grow thereupon between the ink, under the effect of pressure, the phenomenon that the ink can flow automatically often can appear in the printer ink outlet, influence the printing quality of printer easily, secondly, the printer can be detained the ink in the ink outlet on it after using to accomplish, can block up the ink outlet after the ink that detains is dry, when using once more, need clear up the ink outlet, it is more loaded down with trivial details to operate.

SUMMERY OF THE UTILITY MODEL

The present invention addresses the deficiencies of the prior art by providing a low noise printer.

The invention solves the technical problems through the following technical means: the low-noise printer comprises a shell, wherein an ink outlet mechanism is arranged in the shell and comprises an ink storage box and an ink jet box, an ink discharging pipe is connected between the ink storage box and the ink jet box, an ink supply mechanism is arranged at the top of an inner cavity of the ink jet box, and a plurality of ink jet ports are formed in the bottom of the ink jet box; the ink storage box supplies ink to the ink jet box intermittently through the ink supply mechanism, and the ink in the ink jet box is separated from the ink in the ink storage box through the ink supply mechanism, so that the pressure at the bottom of the ink jet box is reduced.

Preferably, supply ink mechanism including connect at the first magnetite at inkjet box inner chamber top and set up the first kickboard in first magnetite bottom, first kickboard top corresponds first magnetite position department and is connected with the second magnetite, first magnetite inhales mutually with the second magnetite magnetic pole that corresponds the position, first kickboard top is connected with the closing cap, the closing cap is to the shutoff of lower china ink pipe, first china ink mouth has been seted up at first kickboard top, the closing cap sets up at first china ink mouth top, and not to first china ink mouth shutoff, first kickboard bottom is provided with the second kickboard, be connected with the connecting wire between first kickboard and the second kickboard.

Preferably, a valve is installed on the ink discharging pipe, and a plugging mechanism is arranged at the bottom of the ink jet box;

shutoff mechanism is including setting up the fly leaf in ink jet box inner chamber bottom, the fly leaf bottom is connected with a plurality of shutoff strip corresponding with the ink jet, be connected with the spring between fly leaf and the ink jet box inner chamber bottom, ink jet box bottom both sides all are connected with the telescopic link, both sides the telescopic link end that stretches out and draws back all is connected with the stopper, the pump body is installed to ink jet box one side, be connected with the blotting pipe between the pump body and the ink jet box bottom, be connected with row's china ink pipe between the pump body and the ink storage box, the relief valve is installed at ink jet box top, the china ink mouth under the second has been seted up at the fly leaf top, the notch has all been seted up to the position department that ink jet box both sides inner wall corresponds the stopper.

Preferably, the inner cavity of the ink-jet box is vertically connected with a limiting rod, and the limiting rod penetrates through the first floating plate, the second floating plate and the movable plate.

Preferably, a driving source is fixedly arranged on one side of the bottom of the ink storage box, which is close to the pump body, a mixing mechanism is arranged in an inner cavity of the ink storage box, and the bottom of the mixing mechanism is connected with a transmission mechanism;

the mixing mechanism comprises a first rotating rod and a second rotating rod which are connected with the ink storage box in a sealing and rotating mode and arranged on two sides of the ink storage box, the outer peripheral surfaces of the first rotating rods on two sides are connected with packing augers, the outer peripheral surfaces of the second rotating rods on two sides are connected with a plurality of stirring blades, the end part of an output shaft of the driving source is in transmission connection with the first rotating rod on the corresponding position, two sides of the ink storage box are connected with hollow pipes, and the packing augers on two sides are respectively arranged in the hollow pipes on the corresponding positions;

the transmission mechanism comprises chain wheels connected to the bottoms of the first rotating rods on the two sides and the bottoms of the second rotating rods on the two sides, and chains are connected between the chain wheels on the two sides.

Preferably, both sides of the bottom of the shell are connected with rubber pads.

The invention has the beneficial effects that:

1. the ink storage box can be used for storing more ink, the ink storage box supplies ink to the ink jet box intermittently through the ink supply mechanism, the ink in the ink jet box is separated from the ink in the ink storage box through the ink supply mechanism, and the height difference between the inks is reduced by a formula: p ═ ρ liquid gH can be obtained, the pressure intensity of the liquid is related to the height between the liquids, the pressure intensity at the bottom of the ink jet box is effectively reduced by reducing the height difference between the inks, the phenomenon of self-flow at the bottom of the ink jet box is further effectively reduced, the ink outlet mechanism not only can store more inks, but also can effectively reduce the phenomenon of self-flow at the bottom of the ink jet box, and therefore the overall practicability is stronger;

2. after printing, the valve is closed, so that the ink storage box does not supply ink to the ink jet box any more, the telescopic rods on the two sides are adjusted to be shortened simultaneously to drive the limiting blocks at the corresponding positions to move into the notches on the two sides, at the moment, the movable plate is not limited downwards any more, the movable plate is limited downwards, the situation that the sealing strips are driven to move downwards to block the ink jet port when the first floating plate and the second floating plate fall to the top of the movable plate is avoided, ink in the ink jet box is pumped into the ink storage box through the pump body, at the moment, the first floating plate and the second floating plate can simultaneously fall to the top of the movable plate, under the action of the gravity of the first floating plate and the second floating plate, the first floating plate and the second floating plate drive the movable plate to move downwards and simultaneously drive the spring to compress, as shown in fig. 7, the movable plate drives the sealing strips at the bottom of the movable plate to be positioned in the ink jet port at the corresponding bottom when the movable plate moves downwards, thereby preventing the ink jet port from being blocked when the printer is not in use, when using once more, open the valve, supply the black ink to the ink jet box in through storing up ink box, along with the injection of ink, first kickplate can rise once more with the second kickplate, and the fly leaf resets under the effect of compression spring restoring force this moment, adjusts the telescopic link of both sides and extends simultaneously, and the stopper through both sides is spacing down to the fly leaf once more for the shutoff strip is no longer to the shutoff of ink jet, thereby is convenient for print once more, need not clear up simple operation to the printer ink jet.

Drawings

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

FIG. 2 is a schematic view of the ink outlet mechanism according to the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 2 according to the present invention;

FIG. 5 is a schematic illustration of the use of ink in the ink jet cartridge of the present invention;

FIG. 6 is a schematic diagram of the first floating plate and the second floating plate falling off;

FIG. 7 is a schematic view of the blocking mechanism of the present invention for blocking the ink ejection port;

fig. 8 is a partial structural schematic diagram of the transmission mechanism of the present invention.

In the figure: 1. a housing; 2. an ink discharging mechanism; 21. an ink storage box; 22. an ink jet cartridge; 23. a drive source; 24. a transmission mechanism; 241. a sprocket; 242. a chain; 25. a mixing mechanism; 251. a first rotating lever; 252. a second rotating rod; 253. a packing auger; 254. stirring blades; 255. a hollow tube; 26. an ink supply mechanism; 261. a first magnet; 262. a first floating plate; 263. a second magnet; 264. sealing the cover; 265. a second floating plate; 266. a connecting wire; 267. a first ink feed port; 27. a plugging mechanism; 271. a movable plate; 272. a plugging strip; 273. a spring; 274. a telescopic rod; 275. a limiting block; 276. a pump body; 277. an ink suction tube; 278. an ink discharge tube; 279. a pressure relief valve; 2710. a second ink feed port; 2711. a recess; 28. an ink discharging pipe; 29. a valve; 210. an ink ejection port; 3. and (7) a rubber pad.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Examples

Referring to fig. 1 to 8, the low noise printer of the present embodiment includes a housing 1, an ink discharging mechanism 2 is disposed inside the housing 1, the ink discharging mechanism 2 includes an ink storage box 21 and an ink jet box 22, a lower ink tube 28 is connected between the ink storage box 21 and the ink jet box 22, an ink supplying mechanism 26 is disposed at the top of an inner cavity of the ink jet box 22, and a plurality of ink jetting ports 210 are disposed at the bottom of the ink jet box 22; as shown in fig. 5 and 6, the ink storage box 21 intermittently supplies ink into the ink jet box 22 through the ink supply mechanism 26, and the ink in the ink jet box 22 is separated from the ink in the ink storage box 21 through the ink supply mechanism 26, so as to reduce the pressure at the bottom of the ink jet box 22;

the ink storage box 21 can be used for storing more ink, the ink storage box 21 intermittently supplies ink to the ink jet box 22 through the ink supply mechanism 26, the ink in the ink jet box 22 is separated from the ink in the ink storage box 21 through the ink supply mechanism 26, and the height difference between the inks is reduced, which is expressed by the formula: p ═ ρ liquid gH can be obtained, the pressure of the liquid is related to the height between the liquids, and by reducing the height difference between the inks, the pressure at the bottom of the ink jet cartridge 22 is effectively reduced, and the phenomenon of the self-flow at the bottom of the ink jet cartridge 22 is further effectively reduced, and the ink outlet mechanism 2 not only can store more inks, but also can effectively reduce the phenomenon of the self-flow at the bottom of the ink jet cartridge 22, so that the overall practicability is stronger.

Referring to fig. 2 and 5 to 7, further, the ink supply mechanism 26 includes a first magnet 261 connected to the top of the inner cavity of the inkjet cartridge 22, and a first floating plate 262 disposed at the bottom of the first magnet 261, a second magnet 263 is connected to the top of the first floating plate 262 at a position corresponding to the first magnet 261, the first magnet 261 and the second magnet 263 at a corresponding position are attracted by magnetic poles, a sealing cover 264 is connected to the top of the first floating plate 262, the sealing cover 264 seals the ink feed tube 28, a first ink feed port 267 is disposed at the top of the first floating plate 262, the sealing cover 264 is disposed at the top of the first ink feed port 267 and does not seal the first ink feed port 267, a second floating plate 265 is disposed at the bottom of the first floating plate 262, and a connection line 266 is connected between the first floating plate 262 and the second floating plate 265;

when the ink jet cartridge 22 is filled with ink, the first floating plate 262 and the second floating plate 265 will be located at the top of the ink jet cartridge 22 due to the buoyancy, the second floating plate 265 will gradually sink along with the continuous decrease of the ink in the ink jet cartridge 22, when the second floating plate 265 is located as shown in fig. 5, the connecting line 266 is straight, and as the ink continues to be used, the second floating plate 265 will not receive buoyancy, at this time, the gravity of the first floating plate 262 and the second floating plate 265 is greater than the magnetic attraction force of the first magnet 261 and the second magnet 263 at the corresponding position, as shown in fig. 6, the first floating plate 262 and the second floating plate 265 will fall to the bottom at the same time, at this time, the sealing cover 264 will not block the lower ink tube 28 any more, the ink in the ink storage cartridge 21 will flow into the ink jet cartridge 22 through the lower ink tube 28, along with the injection of the ink, the first floating plate 262 and the second floating plate 265 will float upwards, when the first floating plate 262 rises to the second magnet 263 to contact the first magnet 261, the first magnet 261 and the second magnet 263 are magnetically attracted, and at this time, the sealing cover 264 seals the lower ink tube 28, so that the ink storage box 21 does not supply ink to the ink jet box 22 any more, and such a cycle is repeated, so that the ink storage box 21 can supply ink to the ink jet box 22 intermittently, more ink can be stored by the ink storage box 21, and the ink in the ink jet box 22 is separated from the ink in the ink storage box 21 by the ink supply mechanism 26, thereby reducing the height difference between the inks, effectively reducing the pressure at the bottom of the ink jet box 22, and further effectively reducing the phenomenon that the bottom of the ink jet box 22 flows automatically.

Referring to fig. 2 to 7, further, a valve 29 is installed on the lower ink tube 28, and a blocking mechanism 27 is disposed at the bottom of the inkjet cartridge 22;

the blocking mechanism 27 comprises a movable plate 271 arranged at the bottom of the inner cavity of the ink-jet box 22, the bottom of the movable plate 271 is connected with a plurality of blocking strips 272 corresponding to the ink-jet port 210, a spring 273 is connected between the movable plate 271 and the bottom of the inner cavity of the ink-jet box 22, two sides of the bottom of the ink-jet box 22 are both connected with telescopic rods 274, the telescopic ends of the telescopic rods 274 at two sides are both connected with a limit block 275, a pump body 276 is installed at one side of the ink-jet box 22, an ink suction pipe 277 is connected between the pump body 276 and the bottom of the ink-jet box 22, an ink discharge pipe 278 is connected between the pump body 276 and the ink-storage box 21, a pressure relief valve 279 is installed at the top of the ink-jet box 22, a second ink discharge port 2710 is formed at the top of the movable plate 271, and notches 2711 are formed at positions, corresponding to the limit blocks 275, on the inner walls at two sides of the ink-jet box 22;

after printing, the valve 29 is closed, so that the ink storage box 21 does not supply ink to the ink jet box 22 any more, the telescopic rods 274 on both sides are adjusted to be shortened at the same time to drive the limit blocks 275 on the corresponding positions to move into the notches 2711 on both sides, at this time, the movable plate 271 is not limited downwards, the movable plate 271 is limited downwards, so as to prevent the first floating plate 262 and the second floating plate 265 from driving the blocking strip 272 to move downwards to block the ink jet port 210 when falling onto the top of the movable plate 271, the ink in the ink jet box 22 is pumped into the ink storage box 21 through the pump 276, at this time, the first floating plate 262 and the second floating plate 265 simultaneously fall onto the top of the movable plate 271, under the gravity action of the first floating plate 262 and the second floating plate 265, the first floating plate 262 and the second floating plate 265 drive the movable plate 271 to move downwards to drive the movable plate 271 to move downwards and simultaneously to drive the spring 273 to compress, as shown in fig. 7, the blocking strip 272 at the bottom of the movable plate 271 moves downwards to be located in the corresponding bottom of the opening 210, thus, the ink ejection port 210 is prevented from being clogged with ink when the printer is not in use, and the ink ejection port 210 of the printer does not need to be cleaned when the printer is reused.

Referring to fig. 2 and fig. 5 to 7, further, a limiting rod is vertically connected to the inner cavity of the inkjet cartridge 22, and the limiting rod is disposed in the first floating plate 262, the second floating plate 265, and the movable plate 271 in a penetrating manner;

the first floating plate 262 and the second floating plate 265 are limited by the limiting rod, and the first floating plate 262 and the second floating plate 265 are prevented from inclining in the ink jet cartridge 22.

Referring to fig. 2 and fig. 5 to 7, further, a driving source 23 is fixedly disposed at a side of the bottom of the ink storage box 21 close to the pump 276, a mixing mechanism 25 is disposed in the inner cavity of the ink storage box 21, and a transmission mechanism 24 is connected to the bottom of the mixing mechanism 25;

the mixing mechanism 25 comprises a first rotating rod 251 and a second rotating rod 252 which are connected with the ink storage box 21 in a sealing and rotating mode and are arranged on two sides of the ink storage box 21, the outer peripheral surfaces of the first rotating rods 251 on the two sides are respectively connected with an auger 253, the outer peripheral surfaces of the second rotating rods 252 on the two sides are respectively connected with a plurality of stirring blades 254, the end part of an output shaft of the driving source 23 is in transmission connection with the first rotating rod 251 on the corresponding position, two sides of the ink storage box 21 are respectively connected with a hollow tube 255, and the auger 253 on the two sides is respectively arranged in the hollow tubes 255 on the corresponding position;

the transmission mechanism 24 comprises chain wheels 241 connected to the bottoms of the first rotating rods 251 on two sides and the bottoms of the second rotating rods 252 on two sides, and a chain 242 is connected between the chain wheels 241 on two sides;

the mixing mechanism 25 is used for fully mixing the ink in the ink storage box 21 to avoid the standing and precipitation of the ink, the transmission mechanism 24 is used for transmission between the first rotating rods 251 on the two sides and the second rotating rods 252 on the two sides, a plurality of driving devices are avoided, resources are saved, the driving source 23 drives the first rotating rods 251 on the two sides and the second rotating rods 252 on the two sides to simultaneously rotate through the transmission mechanism 24, the first rotating rods 251 and the second rotating rods 252 on the two sides drive the packing auger 253 and the stirring blade 254 at the corresponding positions to simultaneously rotate, the packing auger 253 on the two sides upwards turns the ink in the ink storage box 21 when rotating, and the water in the ink storage box 21 is stirred through the stirring blade 254, so that the ink in the ink storage box 21 is fully mixed, the precipitation of the ink is avoided, and the probability of blocking of the ink jetting port 210 is reduced.

Referring to fig. 1, further, two sides of the bottom of the housing 1 are connected with rubber pads 3;

the rubber pad 3 is arranged for shock absorption, and noise generated by vibration of the printer is reduced.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.