阅读说明：本技术 一种自动穿铜箔设备 (Automatic copper foil penetrating equipment ) 是由 朱帅 胡忠辉 于 2020-07-06 设计创作，主要内容包括：本发明涉及穿铜箔技术领域,具体涉及一种自动穿铜箔设备,本发明通过穿铜箔机构带动铜箔移动,有效提高穿铜箔的效率,省时省力,代替人工穿铜箔,有效减少铜箔变形量,降低生产成；通过输送机构输送铜箔持续移动,便于后续加工使用,提高加工效率,保证后续加工的进度；通过按压压板,使限位柱从通孔内滑出,放松固定套筒,转动活动板,使活动座远离固定套筒,便于更换和安装铜箔卷,节省安装时间,提高工作效率；通过调节机构带动输送机构上下移动,使在更换铜箔卷,穿铜箔时输送机构不影响穿铜箔机构的运行,保证自动穿铜箔的工作有效进行,保护铜箔不收损害。(The invention relates to the technical field of copper foil threading, in particular to an automatic copper foil threading device, wherein a copper foil threading mechanism drives a copper foil to move, so that the efficiency of copper foil threading is effectively improved, time and labor are saved, manual copper foil threading is replaced, the deformation of the copper foil is effectively reduced, and the production cost is reduced; the copper foil is conveyed by the conveying mechanism to move continuously, so that the copper foil is convenient to use in subsequent processing, the processing efficiency is improved, and the progress of the subsequent processing is ensured; the limiting column slides out of the through hole by pressing the pressing plate, the fixed sleeve is loosened, the movable plate is rotated, and the movable seat is far away from the fixed sleeve, so that the copper foil coil is convenient to replace and install, the installation time is saved, and the working efficiency is improved; the adjusting mechanism drives the conveying mechanism to move up and down, so that the copper foil coil is replaced, the conveying mechanism does not influence the operation of the copper foil penetrating mechanism when the copper foil is penetrated, the automatic copper foil penetrating work is effectively carried out, and the copper foil is protected from damage.)

1. An automatic copper foil threading device comprises a mounting base plate (1); the copper foil penetrating mechanism is characterized in that a copper foil penetrating mechanism (2) is arranged in the middle of the upper end of the mounting base plate (1), a conveying mechanism (3) is arranged in the middle of the upper end of the copper foil penetrating mechanism (2), an installation mechanism (4) is arranged at the rear end of the copper foil penetrating mechanism (2), an adjusting mechanism (5) is arranged at the lower end of the conveying mechanism (3), and the installation mechanism (4) is matched with the mounting base plate (1);

installation mechanism (4) are including fixed plate (401), fixing base (402), fixed sleeve (403), sliding seat (404), fly leaf (405) and commentaries on classics piece (406), mounting plate (1) rear end left side rigid coupling has fixed plate (401), fixed plate (401) right-hand member rear side rigid coupling has fixing base (402), fixing base (402) right-hand member rigid coupling has fixed sleeve (403), fixed sleeve (403) right-hand member is connected with sliding seat (404), sliding seat (404) right-hand member rigid coupling has fly leaf (405), fly leaf (405) front end rigid coupling has commentaries on classics piece (406), it rotates with mounting plate (1) rear end right side to change piece (406) and is connected.

2. The automatic copper foil threading equipment of claim 1, wherein a long-shaped groove (407) is formed at the right end of the movable seat (404), a support rod (408) is fixedly connected in the long-shaped groove (407), a spring (409) is sleeved at the lower end of the support rod (408), a pressing plate (410) is slidably connected on the support rod (408), the pressing plate (410) is located at the upper end of the spring (409), a limiting column (411) is fixedly connected to the upper side of the left end of the pressing plate (410), a positioning groove (412) is formed at the lower end of the left side in the movable seat (404), a through hole (413) matched with the limiting column (411) is formed at the upper side of the right end of the fixed sleeve (403), and a positioning block (414) matched with the positioning groove (.

3. The automatic copper foil threading device according to claim 1, wherein a mounting groove is formed in the right side of the rear end of the mounting base plate (1), a rotating rod is fixedly connected in the mounting groove, the rotating block (406) is inserted into the mounting groove and is rotatably connected with the rotating rod, a rotation stopping pin (415) is inserted into the upper end of the rotating block (406), and the rotation stopping pin (415) is slidably connected with the mounting base plate (1).

4. The automatic copper foil threading device according to claim 1, wherein the copper foil threading mechanism (2) comprises a motor (201), a rotating shaft (202), a rolling roller (203), a transmission belt (204) and a limiting frame (205), the through groove (101) is formed in the middle of the upper end of the mounting base plate (1), the rotating shaft (202) is rotatably connected to the front end and the rear end of the through groove (101), the rolling roller (203) is fixedly connected to the rotating shaft (202), the transmission belt (204) is wound on the rolling roller (203), the front end is located, the left end of the rotating shaft (202) penetrates out of the mounting base plate (1) and is connected with the motor (201), the limiting frame (205) is fixedly connected to the front side and the rear side of the upper end of the through groove (101), and the limiting frame (205) is matched with the transmission belt (204).

5. The automatic copper foil threading device according to claim 1, wherein the conveying mechanism (3) comprises a conveying plate (301), a second rotating shaft (302), a second motor (303), a conveying roller (304) and a second transmission belt (305), the conveying plate (301) is arranged in the middle of each of the left end and the right end of the mounting base plate (1), the second rotating shafts (302) distributed in a triangular shape are rotatably connected between the conveying plates (301) at the left end and the right end, the conveying roller (304) is fixedly connected to the second rotating shaft (302), the second transmission belt (305) is wound on the conveying roller (304), the second motor (303) is mounted on the upper side of the left end of the conveying plate (301) at the left end, and the output end of the second motor (303) is connected with the second rotating shaft (302).

6. The automatic copper foil threading equipment according to claim 5, wherein the adjusting mechanism (5) comprises a guide plate (501), a baffle (502), a wrench (503), a first rotating rod (504), a second rotating rod (505) and a connecting rod (506), the guide plate (502) is arranged in the middle of each of the left end and the right end of the installation base plate (1), the baffle (502) is fixedly connected to the front end of the guide plate (501), the first rotating rod (504) is fixedly connected to the rear side of the left end of the guide plate (501), the second rotating rod (505) is fixedly connected to the rear side of the left end of the conveying plate (301), the wrench (503) is hinged to the first rotating rod (504), the connecting rod (506) is hinged to the second rotating rod (505), and the other end of the connecting rod (506) is hinged to the wrench (503).

7. The automatic copper foil threading equipment according to claim 6, wherein the upper end of the guide plate (501) is an inclined surface, the lower end of the guide plate (501) is fixedly connected with the mounting base plate (1), and the lower end of the conveying plate (301) is provided with an end surface matched with the upper end of the guide plate (501) and is in sliding connection with the guide plate (501).

8. The use method of the automatic copper foil threading equipment is characterized by comprising the following steps:

s1, sleeving a copper foil roll on an installation mechanism (4);

s2, pulling the wrench (503) backwards to enable the adjusting mechanism (5) to drive the conveying mechanism (3) to move upwards;

s3, drawing one end of the copper foil roll to enable the copper foil roll to be connected with the upper side of the rear end of the copper foil penetrating mechanism (2), and driving the copper foil to move by the copper foil penetrating mechanism (2) to enable the copper foil to be unfolded on the installation bottom plate (1);

s4, loosening the wrench (503), enabling the conveying mechanism (3) to slide downwards under the action of gravity, compressing the copper foil and conveying the copper foil.

Technical Field

The invention relates to the technical field of copper foil threading, in particular to an automatic copper foil threading device.

Background

Copper foil is a negative electrolyte material that is deposited as a thin, continuous metal foil on the substrate layer of a circuit board that serves as the electrical conductor for the PCB. It is easy to adhere to the insulating layer, receive the printing protective layer, form the circuit pattern after corroding. The copper foil is made of copper and other metals in a certain proportion. One of the basic materials of the electronic industry is the motor-grade copper foil, the electronic information industry is rapidly developing, the usage amount of the motor-grade copper foil is increasing, and the product is widely applied to industrial computers, communication equipment, QA equipment, lithium ion storage batteries, civil televisions, video recorders, copier air conditioners, automobile electronic parts, game machines and the like.

The copper foil has low surface courage characteristic, can be attached to various substrates, such as metal, insulating material and the like, and has a wide temperature application range. The conductive copper foil is mainly applied to electromagnetic shielding and antistatic, the conductive copper foil is arranged on the bottom surface of the substrate and combined with a metal base material, so that the conductive copper foil has excellent conductivity and provides an electromagnetic shielding effect. The method can be divided into the following steps: self-adhesive copper foil, double-conductive copper foil, single-conductive copper foil, and the like.

When the copper foil is applied to a metal base material, the copper foil needs to be manually penetrated, and the copper foil is guided to processing equipment, so that the copper foil is convenient to convey and process. However, the copper foil is thin and easy to deform, so that the copper foil is not easy to hold when the copper foil is worn manually, and the damaged copper foil needs to be cut when the copper foil is worn at the working end of the equipment, so that the production cost is increased, and the efficiency of manually wearing the copper foil is slow, time and labor are wasted, and the processing efficiency is slow.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides automatic copper foil threading equipment which can effectively solve the problems that the existing copper foil is thin and easy to deform, the copper foil is not easy to hold when the copper foil is manually threaded, and the damaged copper foil needs to be cut when the copper foil is threaded at the working end of the equipment, so that the production cost is increased, and also solves the problems that the manual copper foil threading efficiency is slow, time and labor are wasted, and the processing efficiency is slow.

In order to achieve the purpose, the invention is realized by the following technical scheme:

an automatic copper foil threading device comprises a mounting base plate; a copper foil penetrating mechanism is arranged in the middle of the upper end of the mounting bottom plate, a conveying mechanism is arranged in the middle of the upper end of the copper foil penetrating mechanism, an installation mechanism is arranged at the rear end of the copper foil penetrating mechanism, an adjusting mechanism is arranged at the lower end of the conveying mechanism, and the installation mechanism is matched with the mounting bottom plate;

installation mechanism includes fixed plate, fixing base, fixed sleeve, sliding seat, fly leaf and commentaries on classics piece, mounting plate rear end left side rigid coupling has the fixed plate, fixed plate right-hand member rear side rigid coupling has the fixing base, fixing base right-hand member rigid coupling has the fixed sleeve, the fixed sleeve right-hand member is connected with the sliding seat, sliding seat right-hand member rigid coupling has the fly leaf, the fly leaf front end rigid coupling has the commentaries on classics piece, the commentaries on classics piece rotates with mounting plate rear end right side to be connected.

Furthermore, long type groove has been seted up to the sliding seat right-hand member, the rigid coupling has branch in the long type groove, branch lower extreme cover is equipped with the spring, and sliding connection has the clamp plate on the branch, the clamp plate is located the spring upper end, and clamp plate left end upside rigid coupling has spacing post, the constant head tank has been seted up to the inside left side lower extreme of sliding seat, the through-hole with spacing post matched with is seted up to fixed sleeve right-hand member upside, and right-hand member downside rigid coupling has the locating piece with constant head tank matched.

Furthermore, the right side of the rear end of the mounting bottom plate is provided with a mounting groove, a rotating rod is fixedly connected in the mounting groove, the rotating block is inserted into the mounting groove and is rotatably connected with the rotating rod, the upper end of the rotating block is inserted with a rotating stopping pin, and the rotating stopping pin is slidably connected with the mounting bottom plate.

Still further, it includes a motor, a pivot, roll roller, a drive belt and spacing to wear copper foil mechanism, mounting plate upper end middle part has been seted up and has been led to the groove, it all rotates and is connected with the pivot No. one to lead to the groove front and back end, the rigid coupling has the roll roller in the pivot No. one, the wiring has a drive belt on the roll roller, is located the front end mounting plate is worn out to a pivot left end to be connected with a motor, it has spacing to lead to the equal rigid coupling in groove upper end front and back side, spacing and drive belt cooperate.

Further, conveying mechanism includes delivery board, No. two pivot, No. two motors, conveying roller and No. two drive belts, installation bottom plate left and right ends middle part all is provided with the delivery board, controls the end rotate between the delivery board and be connected with No. two pivot that is triangular distribution, the rigid coupling has the conveying roller in No. two pivots, the system has No. two drive belts on the conveying roller, is located the left end No. two motors are installed to delivery board left end upside, No. two motor output ends are connected with the pivot No. two.

Furthermore, adjustment mechanism includes deflector, baffle, spanner, bull stick, No. two bull sticks and connecting rod, installation bottom plate left and right ends middle part all is provided with the deflector, the deflector front end rigid coupling has the baffle, is located the left end deflector left end rear side rigid coupling has a bull stick, is located the left end conveyer plate left end rear side rigid coupling has No. two bull sticks, it has the spanner to articulate on the bull stick, it has the connecting rod to articulate on No. two bull sticks, the connecting rod other end is articulated with the spanner.

Furthermore, the upper end of the guide plate is an inclined surface, the lower end of the guide plate is fixedly connected with the mounting bottom plate, and the lower end of the conveying plate is provided with an end surface matched with the upper end of the guide plate and is in sliding connection with the guide plate.

In addition, the invention also discloses a using method of the automatic copper foil threading equipment, which comprises the following steps:

s1, sleeving a copper foil roll on an installation mechanism;

s2, pulling the wrench backwards to enable the adjusting mechanism to drive the conveying mechanism to move upwards;

s3, drawing one end of the copper foil roll to enable the copper foil roll to be connected with the upper side of the rear end of the copper foil penetrating mechanism, and driving the copper foil to move by the copper foil penetrating mechanism to enable the copper foil to be unfolded on the installation bottom plate;

s4, loosening the wrench, enabling the conveying mechanism to slide downwards under the action of gravity, compressing the copper foil and conveying the copper foil.

Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:

1. according to the invention, one end of the copper foil is connected with the upper side of the left end of the first transmission belt, the first motor drives the first rotating shaft to rotate, the rolling roller drives the first rotating belt to move, the copper foil is driven to move from the rear end to the front end of the mounting bottom plate, the moving position of the copper foil is controlled by the limiting frame, the copper foil is prevented from being distorted, the copper foil is penetrated by replacing manpower, the deformation of the copper foil is effectively reduced, and the production cost is reduced;

2. according to the copper foil penetrating mechanism, the copper foil is driven to move by the copper foil penetrating mechanism, so that the copper foil penetrating efficiency is effectively improved, time and labor are saved, the copper foil is conveyed by the conveying mechanism to continuously move, the follow-up processing and use are facilitated, the processing efficiency is improved, and the progress of the follow-up processing is ensured;

3. according to the invention, the adjusting mechanism drives the conveying mechanism to move up and down, so that the conveying mechanism does not influence the operation of the copper foil threading mechanism when a copper foil roll is replaced and the copper foil is threaded, the automatic copper foil threading work is ensured to be effectively carried out, and the copper foil is protected from damage;

4. according to the invention, the limiting column slides out of the through hole by pressing the pressing plate, the fixed sleeve is loosened, the movable plate is rotated, and the movable seat is far away from the fixed sleeve, so that the copper foil coil is convenient to replace and install, the installation time is saved, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

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

FIG. 2 is a schematic side view of the mounting plate of the present invention;

FIG. 3 is a schematic axial view of the copper foil threading mechanism of the present invention;

FIG. 4 is a schematic axial side view of the delivery mechanism and adjustment mechanism of the present invention;

FIG. 5 is a schematic axial view of the mounting mechanism of the present invention;

FIG. 6 is a schematic cross-sectional view of a movable seat in the mounting mechanism of the present invention;

the reference numerals in the drawings denote: 1-mounting a bottom plate, 101-through grooves, 2-copper foil penetrating mechanisms, 201-motors I, 202-rotating shafts I, 203-rolling rollers, 204-transmission belts I, 205-limiting frames, 3-conveying mechanisms, 301-conveying plates, 302-rotating shafts II, 303-motors II, 304-conveying rollers, 305-transmission belts II, 4-mounting mechanisms, 401-fixing plates, 402-fixing seats, 403-fixing sleeves, 404-movable seats, 405-movable plates, 406-rotating blocks, 407-long grooves, 408-supporting rods, 409-springs, 410-pressing plates, 411-limiting columns, 412-positioning grooves, 413-through holes, 414-positioning blocks, 415-rotating stopping pins and 5-adjusting mechanisms, 501-a guide plate, 502-a baffle, 503-a wrench, 504-a rotating rod, 505-a rotating rod and 506-a connecting rod.

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. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be further described with reference to the following examples.

Referring to fig. 1 to 6, an automatic copper foil threading apparatus of the present embodiment includes a mounting base plate 1; mounting plate 1 upper end middle part is provided with wears copper foil mechanism 2, it is concrete, it includes motor 201 No. one to wear copper foil mechanism 2, pivot 202 No. one, roll roller 203, drive belt 204 and spacing 205, logical groove 101 has been seted up at mounting plate 1 upper end middle part, it all rotates to be connected with pivot 202 to lead to groove 101 front and back end, the rigid coupling has roll roller 203 on pivot 202, the wiring has drive belt 204 No. one on the roll roller 203, it wears out mounting plate 1 to be located pivot 202 left end of front end No. one, and be connected with motor 201 No. one, it has spacing 205 to lead to the equal rigid coupling in side around the groove 101 upper end, spacing 205 cooperatees with drive belt 204 No. one. The middle part of the upper end of the copper foil penetrating mechanism 2 is provided with a conveying mechanism 3, the rear end of the copper foil penetrating mechanism 2 is provided with an installation mechanism 4, the lower end of the conveying mechanism 3 is provided with an adjusting mechanism 5, and the installation mechanism 4 is matched with the installation bottom plate 1.

Specifically, referring to fig. 1, fig. 2, fig. 5 and fig. 6, the mounting mechanism 4 includes a fixed plate 401, a fixed seat 402, a fixed sleeve 403, a movable seat 404, a movable plate 405 and a rotating block 406, the fixed plate 401 is fixedly connected to the left side of the rear end of the mounting base plate 1, the fixed seat 402 is fixedly connected to the rear side of the right end of the fixed plate 401, the fixed sleeve 403 is fixedly connected to the right end of the fixed seat 402, the movable seat 404 is connected to the right end of the fixed sleeve 403, the movable plate 405 is fixedly connected to the right end of the movable seat 404, the rotating block 406 is fixedly connected to the front end of the. The right end of the movable seat 404 is provided with a long groove 407, a support rod 408 is fixedly connected in the long groove 407, a spring 409 is sleeved at the lower end of the support rod 408, a pressing plate 410 is slidably connected on the support rod 408, the pressing plate 410 is located at the upper end of the spring 409, a limiting column 411 is fixedly connected to the upper side of the left end of the pressing plate 410, a positioning groove 412 is formed in the lower end of the left side of the inside of the movable seat 404, a through hole 413 matched with the limiting column 411 is formed in the upper side of the right end of the fixing sleeve. Mounting groove has been seted up on mounting plate 1 rear end right side, and the rigid coupling has the bull stick in the mounting groove, and in the bull stick 406 inserted the mounting groove to rotate with the bull stick and be connected, peg graft in the upper end of bull stick 406 and have only changeing round pin 415, only changeing round pin 415 and mounting plate 1 sliding connection.

Specifically, refer to fig. 1 and 4, conveying mechanism 3 includes conveying plate 301, No. two pivot 302, No. two motor 303, conveying roller 304 and No. two drive belts 305, mounting plate 1 all is provided with conveying plate 301 in the middle part of the end about, it is connected with No. two pivot 302 that is triangular distribution to rotate between the end conveying plate 301 to control, the rigid coupling has conveying roller 304 on No. two pivot 302, the system has No. two drive belts 305 around on the conveying roller 304, be located left end conveying plate 301 left end upper side and install No. two motor 303, No. two motor 303 output is connected with No. two pivot 302.

Specifically, referring to fig. 1 and 4, the adjusting mechanism 5 includes a guide plate 501, a baffle 502, a wrench 503, a rotating rod 504, a rotating rod 505 and a connecting rod 506, the guide plate 502 is disposed in the middle of the left end and the right end of the installation bottom plate 1, the baffle 502 is fixedly connected to the front end of the guide plate 501, the rotating rod 504 is fixedly connected to the rear side of the left end guide plate 501, the rotating rod 505 is fixedly connected to the rear side of the left end conveying plate 301, the wrench 503 is hinged to the rotating rod 504, the connecting rod 506 is hinged to the rotating rod 505, and the other end of the connecting rod 506 is hinged to the wrench 503. The upper end of the guide plate 501 is an inclined surface, the lower end of the guide plate 501 is fixedly connected with the installation bottom plate 1, and the lower end of the conveying plate 301 is provided with an end surface matched with the upper end of the guide plate 501 and is connected with the guide plate 501 in a sliding manner.

Referring to fig. 1 to 6, the invention also discloses a use method of the automatic copper foil threading device, which comprises the following steps:

s1, sleeving a copper foil roll on an installation mechanism 4;

the specific method comprises the following steps: the rotation stop pin 415 is taken down, the pressing plate 410 is pressed, the pressing plate 410 downwards compresses the spring 409 and downwards moves along the supporting rod 408, the limiting column 411 is driven to downwards move and is far away from the through hole 413, the movable plate 405 is rotated, and the movable seat 404 is far away from the fixed sleeve 403; the copper foil coil is sleeved on the fixed sleeve 403, the movable plate 405 is rotated reversely to enable the movable seat 404 to be close to the fixed sleeve 403, the movable seat 404 is inserted into the fixed sleeve 403 through the matching of the positioning block 414 and the positioning groove 412, the pressing plate 410 is released, the spring 409 recovers to jack the pressing plate 410, the limiting column 411 is inserted into the through hole 413, the fixed sleeve 403 and the movable seat 404 are fixed, the rotation stopping pin 415 is inserted back, and the movable plate 405 is prevented from rotating.

S2, pulling the wrench 503 backwards to enable the adjusting mechanism 5 to drive the conveying mechanism 3 to move upwards;

the specific method comprises the following steps: the wrench 503 is pulled backwards, so that the wrench 503 drives the conveying plate 301 to move backwards through the connecting rod 506, and the second conveyor belt 305 moves upwards and is far away from the upper end surface of the installation bottom plate 1.

S3, drawing one end of the copper foil roll to enable the copper foil roll to be connected with the upper side of the rear end of the copper foil penetrating mechanism 2, and driving the copper foil to move by the copper foil penetrating mechanism 2 to enable the copper foil to be unfolded on the installation bottom plate 1;

the specific method comprises the following steps: one end of the copper foil roll is pulled to be connected with the upper side of the rear end of the first transmission belt 204 (fixed by using other substances such as adhesive tapes and the like), the first motor 201 is started to drive the first rotating shaft 202 to rotate, the rolling roller 203 drives the first transmission belt 204 to move, the copper foil is moved from the rear end to the front end of the first transmission belt 204, and the limiting frame 205 limits the copper foil to move in other directions in the moving process.

S4, loosening the wrench 503, enabling the conveying mechanism 3 to slide downwards under the action of gravity, compressing the copper foil and conveying the copper foil.

The specific method comprises the following steps: when the wrench 503 is loosened, the conveying plate 301 moves downwards along the guide plate 501 under the action of gravity and is limited to move by the baffle 502, the second transmission belt 304 moves downwards, the lower end of the second transmission belt is in contact with the copper foil, the second motor 303 is started, the second rotating shaft 302 drives the conveying roller 304 to rotate, the second transmission belt 305 drives the copper foil to move, and the copper foil is conveyed to a proper processing position.

It should be noted that the electrical devices used in the whole device are all common devices, which belong to the existing mature technology, and the control circuit can be realized by simple programming by those skilled in the art, which belong to the common knowledge in the field, and only be used without improvement, and the present invention is mainly used to protect the mechanical device, so the present invention does not explain the control mode and the circuit connection in detail.

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; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.