阅读说明：本技术 一种液面高度报警装置 (Liquid level alarm device ) 是由 钟素娟 于 2021-07-02 设计创作，主要内容包括：本发明一种液面高度报警装置包括底板(101),其上固定有支架(102),报警机构(300),其安装在所述支架(102)上,其通过电机(201)驱动撞击锤(313)对金属钹(314)的撞击,实现报警,截流机构(500),其安装在所述支架(102)上,其通过电机(201)驱动阀杆(508)运动,实现三通(509)的开合,从而控制液体的流量,当液面到达一定高度时,所述电机(201)驱动所述撞击锤(313)对所述金属钹(314)进行撞击,从而发出报警声,提醒操作人员页面高度到达报警限位,所述电机(201)还驱动所述截流阀(509)的开关前后移动,从而实现了所述截流阀(509)的开合,进而控制继续注入液体,防止液面高度过高导致的液体流出。(The invention relates to a liquid level alarm device, which comprises a bottom plate (101), a support (102) fixed on the bottom plate, an alarm mechanism (300) arranged on the support (102), and a cut-off mechanism (500) arranged on the support (102), wherein the alarm mechanism is used for realizing alarm by driving an impact hammer (313) to impact a metal cymbal (314) through a motor (201), the cut-off mechanism (500) is arranged on the support (102) and is used for driving a valve rod (508) to move through the motor (201) to realize the opening and closing of a tee joint (509) so as to control the flow of liquid, when the liquid level reaches a certain height, the motor (201) drives the impact hammer (313) to impact the metal cymbal (314) so as to send out an alarm sound to remind an operator that the page height reaches an alarm limit, and the motor (201) also drives a switch of a cut-off valve (509) to move back and forth, so as to realize the opening and closing of the cut-off valve (509) and further control the continuous injection of the liquid, prevent the liquid from flowing out due to the overhigh liquid level.)

1. The utility model provides a liquid level alarm device which characterized in that: comprises that

A base plate (101) on which a bracket (102) is fixed;

and the alarm mechanism (300) is arranged on the support (102) and can realize alarm by driving the impact hammer (313) to impact the cymbal (314) through the motor (201) when the liquid level in the liquid container (312) reaches a preset threshold value.

2. A liquid level alarm device according to claim 1, wherein:

the alarm mechanism (300) comprises a first crank (301), a first pin shaft (302), a first slide rail (303), a second pin shaft (304), a first cam (305), a second slide block (306), a second slide rail (307), a first connecting rod (308), a third slide block (309), a third slide rail (310), a buoy (311), a liquid container (312), a first push rod (315), a first guide hole (316), a first supporting block (321), a first spring (318), an impact hammer (313) and a metal cymbal (314);

the motor (201) is fixed on the support (102), an output shaft (202) of the motor (201) is fixedly connected with one end of the first crank (301), the other end of the first crank (301) is fixedly connected with one end of the first pin shaft (302), the first pin shaft (302) is arranged in the first sliding rail (303) and moves along the first sliding rail, the first sliding rail (303) is fixedly connected with one end of the second pin shaft (304), the other end of the second pin shaft (304) is installed on the second sliding block (306) through a bearing, the second sliding block (306) is arranged in the second sliding rail (307) and moves along the second sliding rail, the second sliding rail (307) is fixed on the outer circumferential surface of the liquid container (312), the second sliding block (306) is fixedly connected with one end of the first connecting rod (308), and the other end of the first connecting rod (308) is fixedly connected with the float (311), the float (311) is disposed in the liquid container (312), and the liquid container (312) is fixed to the holder (102).

The first cam (305) is coaxially fixed to the middle of the second pin (304), the outer circumferential surface of the first cam (305) can overlap one end of the first ram (315), the first ram (315) is disposed in and moves along the first guide hole (316), the first guide hole (316) is opened in the first support block (321), the first support block (321) is fixed to the bracket (102), one end of the first spring (318) is fixed to the first support block (321), the other end of the first spring (318) is fixedly connected to the first ram (315), the first ram (315) is drivingly connected to the impact hammer (313), the impact hammer (313) can overlap the cymbal (314), and the cymbal (314) is fixed to the bracket (102).

3. A liquid level alarm device according to claim 2, wherein:

the first ejector rod (315) is in driving connection with the striking hammer (313) through a swinging mechanism (400), and the swinging mechanism (400) comprises a first rack (401), a first gear (407) and a third pin shaft (408);

the other end of the first ejector rod (315) is fixedly connected with one end of the first rack (401), the first rack (401) is meshed with the first gear (407), the first gear (407) is coaxially fixed with one end of the third pin shaft (408), the other end of the third pin shaft (408) is mounted on the support (102) through a bearing, and the first gear (407) is fixedly connected with the impact hammer (313).

4. A liquid level alarm device according to claim 3, wherein:

the swing mechanism (400) further comprises a first intermittent wheel (410), a first notch (411), a first shift lever (415), a second notch (414), a third notch (412), a first balance wheel (413) and a fourth pin shaft (416);

the first intermittent wheel (410) is coaxially fixed on the surface of the first gear (407), the circumferential surface of the first intermittent wheel (410) is provided with a first notch (411), the outer circumferential surface of the first intermittent wheel (410) can overlap with the third notches (412), two third notches (412) are arranged on the outer circumferential surface of the first balance wheel (413), the outer circumferential surface of the first balance wheel (413) is provided with a second notch (414), the second notch (414) is internally provided with the first deflector rod (415) moving along the second notch, the first driving lever (415) is fixed with the first gear (407) in a non-coaxial way, the surface of the first balance wheel (413) is fixedly connected with one end of the fourth pin shaft (416), the other end of the fourth pin shaft (416) is arranged on the bracket (102) through a bearing, the side surface of the first balance (413) is fixedly connected with the striking hammer (313).

5. A liquid level alarm device according to claim 3, wherein:

the motor (201) also drives the interception mechanism (500), and the interception mechanism (500) comprises a first belt pulley (501), a first transmission belt (502), a second belt pulley (503), a first screw rod (504), a first nut (505), an interception valve (509) and an infusion tube (510);

the middle part of the second pin shaft (304) is coaxially fixed with the first belt pulley (501), the first belt pulley (501) and the second belt pulley (503) are in belt transmission through the first transmission belt (502), the second belt pulley (503) is coaxially fixed with the first screw rod (504), the first screw rod (504) is installed on the support (102) through a bearing, the first screw rod (504) is in threaded connection with the first nut (505), the first nut (505) is in fixed connection with the switch of the shutoff valve (509), the shutoff valve (509) is configured on the infusion tube (510), and the infusion tube (510) is fixedly connected with and communicated with the liquid container (312).

6. A liquid level warning device according to claim 4, characterised in that: the axial symmetry line of the first cam (305) is parallel to the length direction of the first slide rail (303).

7. A liquid level warning device according to claim 5, characterised in that: the first connecting rod (308) is a U-shaped rod.

8. A liquid level warning device according to claim 6, characterised in that: the two third notches (412) are symmetrically distributed about a line of symmetry of the second notch (414).

9. A liquid level alarm device according to claim 7, wherein: the first deflector rod (415) is positioned on the symmetry line of the first notch (411).

Technical Field

The invention relates to an alarm device, in particular to an alarm device for liquid level.

Background

In actual production, a plurality of liquid containers (312) are usually used, such as a liquid container, a water tank, an oil drum, a beverage tank, a brine tank, a chemical reagent tank and the like, and the device is usually in a closed state, so that when liquid is injected into the device, the height of the liquid level is usually difficult to monitor, the work is not changed, sometimes even waste is caused due to the overhigh liquid level, even potential safety production accident hazards are caused, and great inconvenience is caused to the production process.

Disclosure of Invention

The invention aims to provide a liquid level alarm device which can alarm the liquid level and prevent liquid from overflowing.

The invention relates to a liquid level alarm device, which comprises

A base plate on which a bracket is fixed;

and the alarm mechanism is arranged on the bracket and drives the impact hammer to impact the cymbal through the motor when the liquid level in the liquid container reaches a preset threshold value, so that the alarm is realized.

The invention relates to a liquid level warning device, wherein

The alarm mechanism comprises a first crank, a first pin shaft, a first slide rail, a second pin shaft, a first cam, a second slide block, a second slide rail, a first connecting rod, a third slide block, a third slide rail, a float, a liquid container, a first ejector rod, a first guide hole, a first supporting block, a first spring, an impact hammer and a metal cymbal;

the motor is fixed on the support, an output shaft of the motor is fixedly connected with one end of the first crank, the other end of the first crank is fixedly connected with one end of the first pin shaft, the first pin shaft is arranged in the first sliding rail and moves along the first sliding rail, the first sliding rail is fixedly connected with one end of the second pin shaft, the other end of the second pin shaft is installed on the second sliding block through a bearing, the second sliding block is arranged in the second sliding rail and moves along the second sliding rail, the second sliding rail is fixed on the outer circumferential surface of the liquid container, the second sliding block is fixedly connected with one end of the first connecting rod, the other end of the first connecting rod is fixedly connected with the buoy, the buoy is arranged in the liquid container, and the liquid container is fixed on the support.

The invention relates to a liquid level warning device, wherein

The first ejector rod is in driving connection with the impact hammer through a swinging mechanism, and the swinging mechanism comprises a first rack, a first gear and a third pin shaft;

the other end of the first ejector rod is fixedly connected with one end of the first rack, the first rack is meshed with the first gear, the first gear is coaxially fixed with one end of the third pin shaft, the other end of the third pin shaft is installed on the support through a bearing, and the first gear is fixedly connected with the impact hammer.

The invention relates to a liquid level warning device, wherein

The swing mechanism further comprises a first intermittent wheel, a first notch, a first driving lever, a second notch, a third notch, a first balance wheel and a fourth pin shaft;

the first intermittent wheel is coaxially fixed on the surface of the first gear, the first notch is formed in the circumferential surface of the first intermittent wheel, the outer circumferential surface of the first intermittent wheel can be in lap joint with the third notches, the two third notches are formed in the outer circumferential surface of the first balance wheel, the second notch is formed in the outer circumferential surface of the first balance wheel, the first shifting lever moving along the second notch is arranged in the second notch, the first shifting lever and the first gear are non-coaxially fixed, the surface of the first balance wheel is fixedly connected with one end of a fourth pin shaft, the other end of the fourth pin shaft is installed on the support through a bearing, and the side surface of the first balance wheel is fixedly connected with the impact hammer.

The invention relates to a liquid level warning device, wherein

The motor also drives the interception mechanism, and the interception mechanism comprises a first belt pulley, a first transmission belt, a second belt pulley, a first screw, a first nut, an interception valve and an infusion tube;

the middle part of the second pin shaft is coaxially fixed with the first belt pulley, the first belt pulley is in transmission with the second belt pulley through the first transmission belt, the second belt pulley is coaxially fixed with the first screw rod, the first screw rod is installed on the support through a bearing, the first screw rod is in threaded connection with the first nut, the first nut is fixedly connected with a switch of the shutoff valve, the shutoff valve is arranged on the infusion tube, and the infusion tube is fixedly connected with and communicated with the liquid container.

The invention relates to a liquid level alarm device, wherein a first camshaft symmetry line is parallel to the length direction of a first sliding rail.

The invention relates to a liquid level alarm device, wherein a first connecting rod is a U-shaped rod.

According to the liquid level alarm device, the two third notches are symmetrically distributed about the symmetry line of the second notch.

The invention relates to a liquid level alarm device, wherein a first deflector rod is positioned on a symmetrical line of a first notch.

The liquid level alarm device is different from the prior art in that the liquid level alarm device gives out an alarm when the liquid level reaches a certain height and can prevent liquid from continuously flowing in.

The liquid level alarm device of the present invention will be further described with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of a liquid level alarm device;

FIG. 2 is a top plan view of one of the liquid level alarm devices shown in FIG. 1;

FIG. 3 is a partial isometric view of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 2;

FIG. 5 is an isometric view of a liquid level warning device of FIG. 1;

fig. 6 is a variant of the level alarm device of fig. 5.

Detailed Description

As shown in FIG. 1, a liquid level alarm device of the present invention comprises

A base plate 101 on which a bracket 102 is fixed;

and the alarm mechanism 300 is arranged on the support 102, and when the liquid level in the liquid container 312 reaches a preset threshold value, the alarm mechanism drives the impact hammer 313 to impact the cymbal 314 through the motor 201, so that an alarm is realized.

When the liquid level reaches a certain height, the motor 201 drives the impact hammer 313 to impact the cymbal 314, so as to give an alarm sound to remind an operator that the liquid level in the liquid container 312 reaches an alarm limit.

Wherein, the bottom plate 101 can be placed on a horizontal plane such as the ground or a desktop.

Wherein the preset threshold value of the liquid level in the liquid container 312 is 70% of the depth of the liquid container 312.

The power module of the motor 201 comprises a battery, an electric control module and a wireless communication module, and the wireless communication module is in wireless connection with the user terminal.

The present invention can allow a user to directly control the rotation speed and rotation direction of the motor 201 through the wireless communication module, thereby controlling the impact frequency of the impact hammer 313 and the opening and closing speed of the valve rod 508.

As a further explanation of the invention, with reference to figures 1, 2,

the alarm mechanism 300 comprises a first crank 301, a first pin 302, a first slide rail 303, a second pin 304, a first cam 305, a second slide block 306, a second slide rail 307, a first connecting rod 308, a third slide block 309, a third slide rail 310, a float 311, a liquid container 312, a first push rod 315, a first guide hole 316, a first supporting block 321, a first spring 318, a striking hammer 313 and a cymbal 314;

the motor 201 is fixed on the bracket 102, an output shaft 202 of the motor 201 is fixedly connected with one end of the first crank 301, the other end of the first crank 301 is fixedly connected with one end of the first pin shaft 302, the first pin 302 is disposed in and moves along the first slide rail 303, the first slide rail 303 is fixedly connected with one end of the second pin 304, the other end of the second pin 304 is mounted on the second slider 306 through a bearing, the second slider 306 is disposed in and moves along the second slide rail 307, the second slide rail 307 is fixed to the outer circumferential surface of the liquid container 312, the second sliding block 306 is fixedly connected with one end of the first connecting rod 308, the other end of the first connecting rod 308 is fixedly connected with the float 311, the float 311 is disposed in the liquid container 312, and the liquid container 312 is fixed to the holder 102.

The first cam 305 is coaxially fixed to the middle of the second pin 304, the outer circumferential surface of the first cam 305 can be in contact with one end of the first push rod 315, the first push rod 315 is disposed in and moves along the first guide hole 316, the first guide hole 316 is opened in the first support block 321, the first support block 321 is fixed to the bracket 102, one end of the first spring 318 is fixed to the first support block 321, the other end of the first spring 318 is fixedly connected to the first push rod 315, the first push rod 315 is drivingly connected to the impact hammer 313, the impact hammer 313 can be in contact with the cymbal 314, and the cymbal 314 is fixed to the bracket 102.

When the liquid level in the liquid container 312 reaches a certain height, the motor 201 drives the impact hammer 313 to impact the cymbal 314, so as to give an impact alarm sound to remind workers that the liquid level reaches an alarm limit.

When the liquid level in the liquid container 312 is low, the float 311 is flush with the liquid level, so that the horizontal heights of the third slider 309, the second slider 306 and the second pin 304 are low, at this time, because the output shaft 202 of the motor 201 and the second pin 304 have a large horizontal height difference, when the motor 201 drives the first crank 301 to rotate, the first slide rail 303 can only swing within a small range, along with the rise of the liquid level, the horizontal heights of the third slider 309, the second slider 306 and the second pin 304 are simultaneously raised under the action of the float 311, and when the first pin 302 reaches the lowest point and can be coaxial with the second pin 304, the motion state of the first slide rail 303 changes, and at this time, the first slide rail 303 is converted into a rotation state from a swing state.

When the first slide rail 303 is in a rocking state, the striking hammer 313 cannot be engaged with the cymbal 314 by the driving action of the first cam 305 and the first plunger 315, and when the first slide rail 303 is in a rotating state, the striking hammer 313 is engaged with the cymbal 314, thereby generating a striking alarm sound.

Wherein, first supporting block 321 and first bracing piece 317 fixed connection, first bracing piece 317 with the one end fixed connection of first spring 318, the other end of first spring 318 with second bracing piece 319 fixed connection, second bracing piece 319 with first ejector pin 315 fixed connection, consequently can guarantee the one end of first ejector pin 315 with first cam 305 is the overlap joint all the time.

The other end of the first pin 302 is mounted on the first slider 320 through a bearing, and the first slider 320 is disposed in the first slide rail 303 and moves along the first slide rail 303.

Wherein, the second slide rail 307 is fixed on the outer circumferential surface of the liquid container 312 along the axial direction.

The other end of the first connecting rod 308 is fixedly connected to the third slider 309, the third slider 309 is fixedly connected to the float 311, the third slider 309 is disposed in and moves along the third slide rail 310, and the third slide rail 310 is fixed to the inner circumferential surface of the liquid container 312.

Wherein, the other end of the first top rod 315 is fixedly connected with the striking hammer 313.

Wherein the surface of the cymbal 314 is perpendicular to the length direction of the first top rod 315.

Wherein, the person skilled in the art can control the alarm liquid level height by calculating and adjusting the relative height between the lowest point of the first pin 302 and the liquid level.

When the first slide rail 303 changes from the swinging state to the rotating state, the impact hammer 313 just overlaps with the cymbal 314.

The second slider 306 is a dovetail slider, and the second slide rail 307 is a dovetail slide rail, so that the second slider 306 can only move up and down and cannot move back and forth, left and right or rotate.

As a further explanation of the invention, with reference to figure 3,

the first top rod 315 is in driving connection with the striking hammer 313 through a swinging mechanism 400, and the swinging mechanism 400 comprises a first rack 401, a first gear 407 and a third pin 408;

the other end of the first top rod 315 is fixedly connected with one end of the first rack 401, the first rack 401 is engaged with the first gear 407, the first gear 407 is coaxially fixed with one end of the third pin 408, the other end of the third pin 408 is mounted on the bracket 102 through a bearing, and the first gear 407 is fixedly connected with the impact hammer 313.

In the present invention, the first top rod 315 drives the first gear 407 to rotate by the left and right movement of the first rack 401, so that the impact hammer 313 swings, and the impact hammer 313 impacts the cymbal 314 to realize an alarm function.

Wherein the surface of the metal cymbal 314 is parallel to the surface of the bottom plate 101, so that the impact hammer 313 can be overlapped with the bottom plate during swinging, thereby giving an alarm sound by impact.

As a further explanation of the invention, with reference to figure 3,

the oscillating mechanism 400 further comprises a first intermittent wheel 410, a first notch 411, a first shift lever 415, a second notch 414, a third notch 412, a first balance 413 and a fourth pin 416;

the first intermittent wheel 410 is coaxially fixed on the surface of the first gear 407, the first notch 411 is formed in the circumferential surface of the first intermittent wheel 410, the outer circumferential surface of the first intermittent wheel 410 can be overlapped with the third notches 412, the two third notches 412 are formed in the outer circumferential surface of the first balance 413, the second notch 414 is formed in the outer circumferential surface of the first balance 413, the first shift lever 415 which moves along the second notch 414 is arranged in the second notch 414, the first shift lever 415 and the first gear 407 are non-coaxially fixed, the surface of the first balance 413 is fixedly connected with one end of the fourth pin 416, the other end of the fourth pin 416 is mounted on the bracket 102 through a bearing, and the side surface of the first balance 413 is fixedly connected with the impact hammer 313.

According to the invention, the first top rod 315 drives the impact hammer 313 through the first rack 401 to impact the cymbal 314, so as to give an impact alarm to remind a worker that the liquid level of the liquid container 312 reaches an alarm line.

The left and right movement of the first push rod 315 drives the left and right movement of the first rack 401, so that the positive rotation and the reverse rotation of the first gear 407 are realized through rack and pinion transmission, when the left and right movement range of the first push rod 315 is small, the first intermittent wheel 410 drives the small-range swing of the first balance 413 through the first lever 415, at this time, the impact hammer 313 cannot be overlapped with the cymbal 314, so that no alarm impact sound is generated, and when the left and right movement range of the first push rod 315 is large, the swing range of the first balance is increased, so that the impact hammer 313 is driven to collide with the cymbal, so that an alarm sound is generated.

The first intermittent wheel 410 is provided with the first notch 411 to prevent the first balance 413 from interfering with the first intermittent wheel 410.

The side of the first balance 413 is fixedly connected to one end of the second connection rod 417, and the other end of the second connection rod 417 is fixedly connected to the striking hammer 313.

Here, a person skilled in the art can calculate and adjust the pitch circle diameter of the first gear 407, thereby realizing the control of the oscillation range of the first balance 413.

As a further explanation of the invention, with reference to figure 4,

the motor 201 also drives the interception mechanism 500, and the interception mechanism 500 comprises a first belt pulley 501, a first transmission belt 502, a second belt pulley 503, a first screw 504, a first nut 505, an interception valve 509, and an infusion tube 510;

the middle part of the second pin 304 is coaxially fixed with the first belt pulley 501, the first belt pulley 501 and the second belt pulley 503 are in belt transmission through the first transmission belt 502, the second belt pulley 503 is coaxially fixed with the first screw 504, the first screw 504 is installed on the bracket 102 through a bearing, the first screw 504 is in threaded connection with the first nut 505, the first nut 505 is fixedly connected with the switch of the cut-off valve 509, the cut-off valve 509 is arranged on the infusion tube 510, and the infusion tube 510 is fixedly connected and communicated with the liquid container 312.

According to the invention, when the liquid level of the liquid container 312 reaches a certain height, the motor 201 drives the second pin 304 to rotate, so as to drive the shutoff valve 509 to open and close, and thus the flow of the liquid in the liquid conveying pipe 510 is controlled to continuously flow into the liquid container 312 through the shutoff valve 509.

When the liquid level in the liquid container 312 is low, the motor 201 drives the first slide rail 304 to swing, and at the same time, the second pin 304 rotates forward and backward in a small amplitude, and at this time, the first belt pulley 501 and the second belt pulley 503 rotate forward and backward in a small amplitude under the driving of the first driving belt 502, so as to drive the first screw 504 and the first nut 505 to slide relatively in a small range, so that the switch of the shutoff valve 509 cannot be completely closed, and the liquid in the infusion tube 510 can continuously flow into the liquid container 312;

when the liquid level in the liquid container 312 reaches the alarm liquid level, the first slide rail 304 is changed from a swing state to a rotation state, at this time, the second pin 304 drives the first belt pulley 501 to rotate in a single direction, so as to drive the second belt pulley 503 and the first screw 504 to rotate in a single direction, at this time, the first nut 505 continuously drives the shutoff valve 509 to move in a switching manner until the shutoff valve 509 is completely closed, so that the liquid in the infusion tube 510 cannot continuously flow into the liquid container 312, and the liquid container 312 is prevented from overflowing due to an excessively high liquid level.

The cross-sectional shape of the switch of the valve 509 is square, so that the first screw 504 is prevented from driving the first nut 505 to rotate synchronously in the rotating process.

One end of a second support rod 506 is fixed on the first nut 505, the other end of the second support rod 506 is fixedly connected with a first disc 507, and the first disc 507 is coaxially fixed with the valve rod 508.

As a further explanation of the invention, with reference to figure 2,

the first cam 305 has an axis of symmetry parallel to the length direction of the first slide rail 303.

When the first sliding track 303 of the present invention is in a horizontal state, i.e. just after changing from a swing state to a rotation state, the first cam 305 pushes the first push rod 315 to make a maximum displacement, so that the maximum swing amplitude of the first balance 413 and the timing of the change of the motion state of the first sliding track 304 are the same.

The first connecting rod 308 is a U-shaped rod.

The first connecting rod 308 is preferably a U-shaped rod, which ensures that the second slider 306 and the third slider 309 can be lifted and lowered synchronously, and avoids the interference between the first connecting rod 308 and the liquid container 312.

As a further explanation of the invention, with reference to figure 2,

the two third notches 412 are symmetrically distributed about the symmetry line of the second notch 414.

The two third notches 412 are symmetrically distributed, so that the first intermittent wheel 410 can be overlapped with one third notch 412 in the positive rotation process and the reverse rotation process, and the continuous swing of the first balance wheel 413 is limited.

The first lever 415 is located on a symmetry line of the first notch 411.

The first lever 415 is located on a symmetry line of the first notch 411, so that when the first lever 415 overlaps the second notch 414 and dials the first balance 413 to rotate, interference between the first balance 413 and the first intermittent wheel 410 is avoided, and the amplitude of the left-right swing of the first balance 413 can be the same.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.