阅读说明：本技术 一种显影辊自动切拔胶设备 (Automatic rubber cutting and pulling equipment for developing roller ) 是由 周宏辉 于 2020-05-29 设计创作，主要内容包括：本发明公开一种显影辊自动切拔胶设备,涉及显影辊加工技术领域；用于切割并拔出显影辊两端被切割的导电橡胶；包括切胶装置、拔胶装置、传送装置；所述切拔胶设备具有等待切割的待切割位、实施切割的切割位、实施拔胶的拔胶位、以及出料位；所述传送装置将显影辊依次传送至待切割位、所述切割位、所述拔胶位以及所述出料位；所述切胶装置用于在所述切胶位实施切胶；所述拔胶装置在所述拔胶位实施拔胶。本发明的自动切拔胶设备能够实现显影辊的导电橡胶的自动切割与拔出,其自动化程度高,节省了人力的同时也能够避免对显影辊的污染；并且能够适应多种不同规格的显影辊的切割要求。(The invention discloses automatic rubber cutting and pulling equipment for a developing roller, and relates to the technical field of developing roller processing; the conductive rubber is used for cutting and pulling out the two ends of the developing roller; comprises a rubber cutting device, a rubber pulling device and a conveying device; the glue cutting and pulling equipment is provided with a position to be cut waiting for cutting, a cutting position for implementing cutting, a glue pulling position for implementing glue pulling and a material discharging position; the conveying device conveys the developing roller to a position to be cut, the cutting position, the glue drawing position and the discharging position in sequence; the glue cutting device is used for cutting glue at the glue cutting position; and the glue pulling device pulls the glue at the glue pulling position. The automatic rubber cutting and pulling equipment can realize automatic cutting and pulling of the conductive rubber of the developing roller, has high automation degree, saves manpower and can avoid pollution to the developing roller; and can meet the cutting requirements of developing rollers with various specifications.)

1. The automatic rubber cutting and pulling equipment for the developing roller comprises a metal shaft center and conductive rubber sleeved on the metal shaft center, and is used for cutting and pulling redundant conductive rubber at two ends of the developing roller; the device is characterized by comprising a rubber cutting device, a rubber pulling device and a conveying device; the glue cutting and pulling equipment is provided with a position to be cut waiting for cutting, a cutting position for implementing cutting, a glue pulling position for implementing glue pulling and a material discharging position;

the conveying device conveys the developing roller to a position to be cut, the cutting position, the glue drawing position and the discharging position in sequence;

the rubber cutting device is positioned at the cutting position and comprises two blade assemblies controlled to move up and down, two positioning assemblies used for positioning the developing roller at two ends of the developing roller, a second movement control assembly used for controlling the two blade assemblies to move oppositely or move in opposite directions along the left and right directions, and a third movement control assembly used for controlling the two positioning assemblies to move oppositely or move in opposite directions along the left and right directions; contacting the developer roller when the blade assembly is moved to the lowermost end;

the rubber pulling device is positioned at the rubber pulling position and comprises two openable pulling heads for clamping or loosening the conductive rubber to be pulled out at the two ends of the developing roller and a fourth movement control assembly for controlling the two pulling heads to move along the left and right directions in opposite directions or in opposite directions.

2. The automatic cut and draw apparatus of claim 1, wherein the positioning assembly comprises a first support frame controlled to move up and down; the first support frame is positioned right below the developing roller of the cutting position; when the first support frame is controlled to move upwards, the developing roller is abutted on the first support frame.

3. The automatic glue cutting and drawing equipment according to claim 1, further comprising a sensing assembly for detecting whether the developing roller exists at the position to be cut.

4. The automatic cutting and glue-pulling equipment according to claim 1, characterized in that the conveying device comprises two parallel synchronous conveying belts, a plurality of brackets are arranged on the outer surfaces of the synchronous conveying belts at equal intervals, and the developing rollers abut against the brackets.

5. The automatic cut and draw apparatus of claim 4, wherein the carriage has a V-shaped groove in which a developer roller abuts against the carriage.

6. The automatic rubber cutting and pulling equipment according to claim 4, wherein a discharging end of the synchronous conveyor belt is connected with a blanking plate; the blanking plate is arranged from the discharge end in a downward inclined mode.

7. The automatic adhesive cutting and pulling equipment according to claim 6, wherein the side of the blanking plate facing the synchronous conveyor belt is provided with two notches allowing the bracket to pass through downwards.

8. The automatic adhesive cutting and pulling equipment according to any one of claims 1 to 7, wherein the third movement control assembly and the fourth movement control assembly are the same movement control assembly.

9. The automatic glue cutting and pulling equipment according to any one of claims 1 to 7, wherein the glue pulling device further comprises a pressing component for pressing and fixing the developing roller.

10. The automatic glue cutting and pulling equipment according to claim 9, wherein the pressing assembly comprises a fixed pressing bracket, a pressing plate positioned right above the developing roller and a second supporting frame positioned right below the developing roller; the developing roller is abutted against the second support frame; the pressing plate is elastically connected with the pressing support in the vertical direction; the pressure plate applies a force downward to the developing roller above the developing roller.

Technical Field

The invention relates to the technical field of processing of developing rollers, in particular to an automatic rubber cutting and pulling device for a developing roller.

Background

The developing roller is a key component of the toner cartridge, and the toner of the toner cartridge is supplied to the photosensitive drum through the developing roller to complete the development of the image, so the quality of the developing roller will determine the imaging quality of the toner cartridge. The conventional developing roller consists of a metal shaft center and conductive rubber which is sleeved outside the metal shaft center and tightly wraps the metal shaft center, redundant rubber at two ends needs to be cut after rubber sleeving is finished, the rubber with two ends cut is pulled out and separated from the developing roller, manual rubber cutting is mostly adopted in the rubber cutting process at present, the mode is low in efficiency, the manual rubber cutting is not easy to obtain uniform size, batch-to-batch difference is easy to occur, the surface of the rubber roller is easy to be polluted in the rubber cutting process, and the printing quality of the developing roller which is filled into a carbon powder box is further influenced; meanwhile, the cut rubber cannot be pulled out due to manual rubber cutting, secondary rubber cutting is needed, the metal axis can be cut due to too deep cutting angle, the defect of the metal axis can be caused, and the service life of the developing roller can be seriously influenced.

Disclosure of Invention

The invention aims to provide an automatic rubber cutting and pulling device for a developing roller, which can realize automatic rubber cutting and pulling of the developing roller and can adapt to cutting requirements of different cutting intervals; the invention is realized by the following technical scheme:

the automatic rubber cutting and pulling equipment for the developing roller comprises a metal shaft center and conductive rubber sleeved on the metal shaft center, and is used for cutting and pulling redundant conductive rubber at two ends of the developing roller; the device is characterized by comprising a rubber cutting device, a rubber pulling device and a conveying device; the glue cutting and pulling equipment is provided with a position to be cut waiting for cutting, a cutting position for implementing cutting, a glue pulling position for implementing glue pulling and a material discharging position;

the conveying device conveys the developing roller to a position to be cut, the cutting position, the glue drawing position and the discharging position in sequence;

the rubber cutting device is positioned at the cutting position and comprises two blade assemblies controlled to move up and down, two positioning assemblies used for positioning the developing roller at two ends of the developing roller, a second movement control assembly used for controlling the two blade assemblies to move oppositely or move in opposite directions along the left and right directions, and a third movement control assembly used for controlling the two positioning assemblies to move oppositely or move in opposite directions along the left and right directions; contacting the developer roller when the blade assembly is moved to the lowermost end;

the rubber pulling device is positioned at the position and comprises two openable pulling heads for clamping or loosening the conductive rubber to be pulled out at two ends of the developing roller and a fourth movement control component for controlling the two pulling heads to move along the left and right directions in opposite directions or in opposite directions.

Specifically, the positioning assembly comprises a first support frame controlled to move up and down; the first support frame is positioned right below the developing roller of the cutting position; when the first support frame is controlled to move upwards, the developing roller is abutted on the first support frame.

Preferably, the cutting device further comprises a sensing assembly for detecting whether the developing roller exists at the position to be cut.

Further, conveyer includes two parallel arrangement's synchronous conveyer belt, be provided with a plurality of bracket on the surface of synchronous conveyer belt equidistance, the developer roll butt is in on the bracket.

Preferably, the carriage has a V-groove in which the developing roller abuts on the carriage.

Furthermore, a discharging end of the synchronous conveyor belt is connected with a blanking plate; the blanking plate is arranged from the discharge end in a downward inclined mode.

Preferably, the side of the blanking plate facing the synchronous conveyor belt is provided with two notches allowing the bracket to pass through downwards.

Further, the third movement control assembly and the fourth movement control assembly are the same movement control assembly.

Further, still include the frame, cut mucilage binding and put, the rubber pulling device, conveyer install in the frame.

Further, the glue cutting device, the glue pulling device and the conveying device are electrically connected with the control device.

Further, the glue pulling device further comprises a pressing component used for pressing and fixing the developing roller.

Further, the pressing assembly comprises a fixed pressing support, a pressing plate positioned right above the developing roller and a second supporting frame positioned right below the developing roller; the developing roller is abutted against the second support frame; the pressing plate is elastically connected with the pressing support in the vertical direction; the pressure plate applies a force downward to the developing roller above the developing roller.

The invention has the beneficial technical effects that:

the automatic rubber cutting and pulling equipment can realize automatic cutting and pulling of the conductive rubber of the developing roller, has high automation degree, saves manpower and can avoid pollution to the developing roller; the cutting requirements of developing rollers with various specifications can be met; and the rubber cutting, the rubber pulling and the material receiving can be carried out simultaneously, and the efficiency is high.

Drawings

FIG. 1 is a schematic structural view of a developing roller provided in an embodiment of the present invention;

FIG. 2 is one of the overall structural schematic diagrams of the automatic cutting and stripping device for conductive rubber of a developing roller according to the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a rubber cutting device of an automatic rubber cutting and pulling device for developing roller conductive rubber according to an embodiment of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is a schematic view of a part of the structure of an automatic cutting and stripping device for conductive rubber of a developing roller according to an embodiment of the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a second schematic view of the overall structure of an automatic rubber cutting and pulling apparatus for developing roller conductive rubber according to an embodiment of the present invention;

the reference numbers illustrate:

001-developing roller, 002-conductive rubber, 003-metal axle center;

100-glue cutting device, 111-blade, 112-blade mounting rack, 121-first control motor, 131-second control motor, 141-top cup, 142-fifth control motor, 143-third control motor, 144-first support frame, 145-support platform, 150-cutting mounting plate, 151-second slide rail, 152-second slide seat, 154-baffle, 160-fixed mounting plate, 161-first slide rail, 162-first slide seat and 166-induction component;

200-glue pulling device, 210-head pulling, 221-pressing bracket, 222-second support frame, 223-control cylinder and 224-pressing plate;

400-a conveying device, 410-a synchronous conveying belt, 411-a bracket, 420-a fourth control motor, 430-a blanking plate and 431-a notch;

500-frame.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It is noted that, unless otherwise indicated, 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 invention belongs.

With reference to FIGS. 2 to 7; the embodiment provides automatic rubber cutting and pulling equipment for developing roller conductive rubber; referring to fig. 1, the developing roller 001 includes a metal shaft center 003 and conductive rubber 002 sleeved on the metal shaft center, and the automatic rubber cutting and pulling device of the present invention is used for cutting and pulling out the redundant conductive rubber on two sides of the metal shaft center; the automatic cutting and glue drawing device comprises a glue cutting device 100, a glue drawing device 200, a control device (not shown), a conveying device 400 and a rack 500; the glue cutting device 100, the glue pulling device 200 and the conveying device 400 are all installed on the rack 500.

The automatic glue cutting and pulling equipment provided by the invention is provided with a to-be-cut position waiting for cutting, a cutting position for implementing cutting, a glue pulling position for implementing glue pulling and a material discharging position; the cutting device 100 performs cutting operation on the conductive rubber of the developing roller located at the cutting position, the rubber pulling device 200 performs rubber pulling (pulling out the cut conductive rubber) on the developing roller located at the rubber pulling position, the discharging position is located at the tail end of the conveying device, and the discharging of the developing roller which is cut and pulled out is completed. The conveying device 400 conveys the developing roller to a position to be cut, the cutting position, the glue drawing position and the discharging position in sequence; the developing rollers of the cutting position and the glue pulling position can be adjacent to each other on the conveying device 400, or a plurality of developing rollers can be arranged in the middle at intervals. Because the installation of the rubber cutting device 100 and the rubber pulling device 200 can occupy a certain space, and meanwhile, for faster production efficiency, a developing roller is arranged between the cutting position and the rubber pulling position at an interval.

With reference to fig. 2 and 7, the conveyor 400 includes two synchronous belts 410 disposed in parallel and driven synchronously along the Y-axis; the present embodiment designates the direction in which the synchronous conveyor belt 410 conveys the developing roller 001 as the front-rear direction or the Y-axis direction; a plurality of accommodating positions for accommodating the developing roller 001 are arranged on the synchronous conveyor belt 410 at equal intervals, the length direction of the developing roller 001 is perpendicular to the Y axis, and in the embodiment, the length direction of the developing roller 001 on the synchronous conveyor belt 410 is marked as the X axis direction or the left and right direction; specifically, a plurality of brackets 411 are arranged on the outer surface of the synchronous conveyor belt 410 at equal intervals, each bracket 411 is provided with a groove for receiving a developing roller, and conductive rubber at two ends of each developing roller abuts against the corresponding bracket 411 in each groove; in this embodiment, the recess is V type groove, the recess can carry on spacingly to the developer roll in bracket 411, prevents the developer roll at the ascending displacement of Y axle direction in the transportation.

The timing belt 410 rotates under the control of the fourth control motor 420; the fourth control motor 420 is electrically connected to the control device. A discharging end (namely a discharging position) of the synchronous conveyor belt 410 is connected with a blanking plate 430, and the blanking plate 430 is arranged from the discharging end of the synchronous conveyor belt in a downward inclination manner, so that the developing roller can roll down conveniently; the side of the blanking plate 430 facing the synchronous conveyor belt 410 is provided with two notches 431 which can allow the bracket 411 to pass through downwards; after the synchronous conveyor 410 moves the developing roller with the cut and pulled out glue to the blanking plate 430, the developing roller 001 is received by the blanking plate 430 and is discharged and collected along the inclined surface of the blanking plate, and the bracket 411 continues to move along with the synchronous conveyor 410 through the gap 431.

In this embodiment, the direction perpendicular to the X axis and the Y axis is referred to as the up-down direction or the Z axis direction; referring to fig. 3 and 4, the rubber cutting apparatus 100 includes two blade assemblies symmetrically disposed, a first movement control assembly for controlling the two blade assemblies to move up and down, a second movement control assembly for controlling the two blade assemblies to move in opposite directions or in opposite directions, a positioning assembly for positioning the developing roller to be cut, a cutting mounting plate 150, and a fixing mounting plate 160.

Blade assembly includes blade 111 and blade mount 112; the blade 111 is fixedly arranged at the lower end of the blade mounting frame 112; the blade is positioned right above the position to be cut of the developing roller at the cutting position.

Each of the blade assemblies is mounted on the cutting mounting plate 150; the fixed mounting plate 160 is a fixedly disposed one component; the cutting mounting plate 150 is slidably connected to the fixing mounting plate 160 up and down. The first movement control assembly includes a first control motor 121 and a first linear movement module (not shown) connected to the first control motor 121, and the cutting mounting plate 150 is fixedly mounted on a first slider (not shown) of the first linear movement module; the first sliding block is controlled to move along the up-and-down direction. The first control motor 121 is fixedly mounted on the fixed mounting plate 160.

Specifically, at least one first slide rail 161, two in this embodiment, is installed on the fixed mounting plate 160; two first slide rails 161 are provided at both sides of the cutting installation plate 150; each first slide rail 161 is provided with a plurality of first slide seats 162 capable of sliding up and down along the first slide rail 161; the cutting installation plate 150 is fixedly installed on each first sliding seat 162; therefore, when the first control motor 121 controls the first slider (and also drives the first sliding seat) to move up and down, the cutting mounting plate 150 is driven to slide up and down along the first sliding rail 161 relative to the fixed mounting plate 160, so as to drive each blade assembly to slide up and down. The first control motor 121 is electrically connected to the control device.

The second movement control assembly includes two second control motors 131 and two second linear movement modules (not shown), and each of the second control motors 131 is correspondingly connected to each of the second linear movement modules; the two blade assemblies are correspondingly and fixedly arranged on a second sliding block (not shown) of the second linear moving module; the second sliders are controlled by second control motors 131 to move in the left-right direction or in the opposite direction.

The cutting mounting plate 150 is provided with at least one second sliding rail 151 arranged transversely, in this embodiment, two second sliding rails 151 are arranged, and each second sliding rail 151 is arranged at an interval from top to bottom; a baffle 154 is arranged at the middle position of the two slide rails; the cutting mounting plate is provided with two second sliding rails which are transversely arranged, and the two second sliding rails are longitudinally arranged at intervals; at least one second sliding seat 152 is mounted on each second sliding rail 151 on the left and right sides of the baffle 154; the two blade assemblies are respectively fixedly connected with the second sliding seats 152 at two sides of the baffle 154; each second sliding seat can slide left and right along the second sliding rail 151; therefore, when the two second control motors 131 respectively control the second sliding blocks (and simultaneously drive the second sliding seats) to move in the left-right direction or in the opposite direction, the two blade assemblies are driven to move along the second sliding rails 151 in the opposite direction or in the opposite direction; therefore, the distance between the two blades 111 can be adjusted according to the specific rubber cutting position, the rubber cutting device is suitable for the rubber cutting requirements of developing rollers of different models, and the usability of the automatic rubber cutting device is wider.

The positioning assembly includes two symmetrically disposed top cups 141, a rotation control assembly for controlling the rotation of the top cups 141 with the central axis thereof as the axis, and a third movement control assembly for controlling the two top cups 141 to move in opposite directions or in opposite directions. The top cups 141 are respectively aligned with the metal axes of the developing roller at two ends of the developing roller, and the top cups 141 and the developing roller to be cut are coaxially arranged; the top cup 141 has a working position fixedly connected with the metal axis of the developing roller at the cutting position and a waiting position separated from the metal axis of the developing roller along the X-axis direction; the third movement control assembly controls the position of the top cup 141 to be switched between the fixed position and the waiting position.

In this embodiment, the interference fit between the top cup 141 and the metal shaft center enables the metal shaft center to be clamped and positioned after being inserted into the top cup; in other embodiments, the top cup may be a pneumatic chuck for pneumatically clamping the metal hub. In any way, in the prior art, the manner of positioning the top cup and the metal shaft center is the content of the present invention.

When the metal axis is clamped and positioned, the blade 111 descends to the position to be cut on the developing roller, and the rotation control assembly controls the top cup 141 to rotate so as to drive the developing roller 001 to rotate to cut redundant conductive rubber at two ends of the developing roller.

Wherein the rotation control assembly includes two fifth control motors 142; the third movement control component may be two third control motors 143 and a third linear motion module correspondingly connected to the third control motors 143, and the two top cups are correspondingly and fixedly mounted at a moving end (a third slider, not shown) of the third linear motion module.

When the blade 111 cuts the developing roller, a downward pressure is applied to the developing roller, which may cause the developing roller to displace downward and cause incomplete cutting; therefore, it is preferable that the positioning assembly further includes a first supporting frame 144 supporting the developing roller at the bottom of the developing roller to prevent the developing roller from moving downward, and the first supporting frame 144 is controlled to move up and down, and move up when cutting is required, the developing roller abuts on the first supporting frame 144, the first supporting frame 144 supports the developing roller, and the developing roller can be prevented from being displaced downward during cutting; when the cutting is completed, the first support frame 144 is controlled to move downward to avoid the first support frame 144 from obstructing the transfer of the developing roller by the transfer device.

With reference to fig. 5 and 6, the rubber pulling device 200 is used for pulling out the conductive rubber cut by the rubber cutting device, and the rubber pulling device 200 includes a pulling head 210 which can be opened and closed, and a fourth movement control mechanism and a pressing assembly which control the two pulling heads 210 to move in opposite directions or opposite directions along the left-right direction; in this embodiment, in order to save cost and improve production efficiency, the fourth movement control mechanism is the same as the third movement control mechanism, so that the glue cutting and drawing processes can be performed simultaneously; specifically, the pulling head 210 and the top cup 141 are fixedly mounted on the supporting platform 145, and the supporting platform 145 is fixedly mounted at the moving end of the third linear motion module.

The pressing assembly comprises a fixed pressing bracket 221, a pressing plate 224 positioned right above the developing roller at the cutting position, a second supporting frame 222 of the developing roller at the cutting position and a control cylinder 223; the pressing plate 224 is elastically connected with the pressing bracket 221 in the vertical direction; the second support 222 is installed at the moving end of the control cylinder 223, and the second support 222 is controlled by the control cylinder 223 to move back and forth in the up-and-down direction; when the second support frame 222 is controlled to be upward, the developing roller is abutted to the second support frame 222, and meanwhile the pressing plate 224 presses the developing roller to tightly press the developing roller, so that the phenomenon that the developing roller shakes in the process of pulling out rubber is avoided, and the stability of the rubber pulling-out process is ensured. Also, when the rubber extraction is completed, the second support bracket 222 is controlled to move downward to avoid the second support bracket 222 from obstructing the conveyance of the developing roller by the conveyance device.

In the invention, V-shaped grooves are arranged above the first support frame 144 and the second support frame 222, and the developing roller is abutted on each support frame in the V-shaped grooves.

Preferably, referring to fig. 7, the automatic glue cutting and pulling apparatus of the present invention further includes a sensing assembly 166 mounted on the back surface of the fixed mounting plate 160, wherein the sensing assembly 166 is aligned with the developing roller at the position to be cut and is used for detecting whether there is a developing roller at the position to be cut, if the sensing assembly 166 does not sense that the developing roller at the position to be cut will feed back a signal to the control device to alarm, the machine stops running, and the sensing assembly 166 is arranged to avoid idle running of the glue cutting device.

Each control motor and each control cylinder are electrically connected with a control device, and are controlled by signals of the control device to perform corresponding actions; wherein the control device is for example a programmable controller PLC.

The working process of the automatic glue cutting and pulling equipment of the invention is described as follows:

after the developing roller is sequentially put to the carriage on the conveying device, the following procedure is followed:

1. after the conveyor belt is controlled to advance by one roller position, the synchronous conveyor belt stops working;

2. the controlled relative motion of supporting platform 145, the metal axle center of the developer roll both sides of cutting position this moment inserts in the top cup and realizes fixing, is located the conductive rubber of the developer roll both ends cutting separation of drawing the position and wears to locate between the pulling head, later carries out following three actions simultaneously:

a. the first support frame 144 is controlled to move upward so that the developing roller abuts on the first support frame; thereafter the blade assembly is controlled to move downwardly to a cutting position; the top cup is controlled to rotate at a high speed and drives the developing roller to rotate, so that the developing roller is cut, and after the cutting is finished, the blade assembly is controlled to move upwards to a standby position;

b. the pulling head is closed, the conductive rubber cut and separated at the two ends of the developing roller positioned at the rubber pulling position is clamped by the clamping head, and the second support frame 222 is controlled to move upwards to enable the developing roller to abut against the second support frame 222;

c. the sensing assembly 166 detects whether a developer roller is present at the location to be cut.

3. The supporting platform 145 is controlled to move reversely, so that the two top cups move reversely to loosen the developing roller, and meanwhile, the chuck moves reversely to pull out the cut conductive rubber;

4. the clamping head is loosened to discard the waste rubber material, and the two supporting frames are controlled to move downwards.

5. Judging whether a developing roller is arranged at the position to be cut detected by the induction component 166, and if so, executing the steps 1-4 again; if not, an alarm is given, and the equipment stops running to prevent the rubber cutting device from idling.

The fixed mounting and the fixed connection of the invention can be direct fixed mounting or fixed connection, and can also be fixed mounting or fixed connection through a mounting plate or other components.

The automatic rubber cutting and pulling equipment can realize automatic cutting and pulling of redundant conductive rubber at two ends of the developing roller, has high automation degree, saves manpower and can avoid pollution to the developing roller; and can meet the cutting requirements of developing rollers with various specifications.

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, improvement and the like which are not made by the creativity within the spirit and principle of the invention shall be included in the protection scope of the invention.