CN112710570A

CN112710570A - Auxiliary assembly based on test fruit hardness automatic classification

Info

Publication number: CN112710570A
Application number: CN202110017455.4A
Authority: CN
Inventors: 张军
Original assignee: Nanjing Yuepeng Trading Co ltd
Current assignee: Nanjing Yuepeng Trading Co ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-04-27

Abstract

The invention discloses an auxiliary device for automatically classifying fruits based on testing the hardness of the fruits, which comprises a classifying device, wherein a sorting mechanism for placing the fruits one by one is arranged in the classifying device, a driving mechanism for providing power for the device is also arranged in the classifying device, an auxiliary mechanism for separating the fruits is also arranged in the classifying device, the sorting mechanism comprises a working cavity which is also arranged in the classifying device, the device has a simple structure and is convenient and fast to operate, when the device normally works, a worker firstly places the device beside the fruits to be classified, then places the fruits into the device, and then the device screens the fruits one by one according to the own sorting mechanism, and then distinguishes the hardness degree of the fruits through the device, and meanwhile, the classified fruits are placed, so the labor intensity of the worker is reduced, and the labor distribution of the worker is saved, the working efficiency of the working personnel is improved.

Description

Auxiliary assembly based on test fruit hardness automatic classification

Technical Field

The invention relates to the field of related design of high-end testing machine equipment, in particular to auxiliary equipment for automatically classifying fruits based on testing hardness.

Background

In the modern times, the testing equipment has many types, and the testing equipment commonly used in factories has many types, including measuring equipment calipers, balances, dotting machines and the like, and in addition, quality detection analytical instruments, material detection, packaging detection equipment and the like are also common detection equipment;

at the present stage, the soft and hard degree of the fruits in the fruit vending shop also affects the price of the fruits to some extent, and workers usually pinch the fruits with hands to sort the fruits with different hardness, so that the fruits are re-priced.

Disclosure of Invention

The invention aims to solve the technical problem of providing auxiliary equipment for automatically classifying fruits based on testing the hardness of the fruits, and the auxiliary equipment overcomes the problems.

The invention is realized by the following technical scheme.

The invention relates to auxiliary equipment for automatically classifying fruits based on testing hardness of the fruits, which comprises a classifying device, wherein a sorting mechanism for placing the fruits one by one is arranged in the classifying device, a driving mechanism for providing power for the device is also arranged in the classifying device, an auxiliary mechanism for separating the fruits is also arranged in the classifying device, the sorting mechanism comprises a working cavity which is also arranged in the classifying device, a block is also arranged in the upper cavity wall of the working cavity, block cavities are also arranged in the left and right cavity walls of the block, a block is arranged in the block cavity, the left end surface of the block is fixedly connected with a block return spring of which the other end is fixedly connected with the left cavity wall of the block cavity, the left end surface of the block is also fixedly connected with a thick rope, a schematic cavity is also arranged in the lower cavity wall of the fruit falling cavity, a schematic block is arranged in the schematic cavity, and a buffer cushion is fixedly connected with the upper end surface of, the lower end face of the indication block is fixedly connected with the other end and an indication spring fixedly connected with the lower cavity wall of the indication cavity, the right end face of the indication block is fixedly connected with the other end of the thick rope, a pushing cavity with a left opening is further arranged in the right cavity wall of the working cavity, a pushing block is arranged in the pushing cavity, a pressure cushion pad is fixedly connected with the left end face of the pushing block, the other end of the right end face of the pushing block is fixedly connected with an expansion spring fixedly connected with the right cavity wall of the pushing cavity, and the other end of the thin rope is fixedly connected with the right end face of the pushing block.

Further, a control cavity with an upward opening is arranged in the lower cavity wall of the pushing cavity, a control block is arranged in the control cavity, the other end of the lower end face of the control block is fixedly connected with a control spring fixedly connected with the lower cavity wall of the control cavity, the lower end face of the control block is also fixedly connected with an auxiliary contact, the lower cavity wall of the control cavity is fixedly connected with a main contact, a compression cavity is arranged in the upper cavity wall of the pushing cavity, a compression displacement block is arranged in the compression cavity, the other end of the left end face of the compression displacement block is fixedly connected with a compression spring fixedly connected with the left cavity wall of the compression cavity, and a leather rope is fixedly connected with the left end.

Further, the driving mechanism comprises a driven cavity which is arranged in the sorting device, the upper cavity wall of the driven cavity is rotatably connected with a driven shaft, the other end of the driven shaft is rotatably connected with the lower cavity wall of the working cavity, the driven shaft which is arranged in the working cavity is fixedly connected with a double grooved pulley, the driven shaft which is arranged in the driven cavity is fixedly connected with a driven wheel, the right cavity wall of the driven cavity is also internally provided with a driving cavity, the upper cavity wall of the driving cavity is fixedly connected with a motor, the motor is in power connection with a power shaft, the power shaft is fixedly connected with a local gear which is meshed with the driven wheel, the power shaft is connected with a cylindrical disc through a spline, the lower cavity wall of the driving cavity is rotatably connected with a fixed shaft, the fixed shaft is fixedly connected with a rope winding wheel and a circular disc, the upper end face of, the wall of drive chamber upper chamber still rotates and is connected with the rotation axis, rotation axis fixedly connected with local type gear engagement's rotating gear, the rotating gear up end fixedly connected with other end with wall fixed connection's rotatory torsional spring on the drive chamber, rotation axis still fixedly connected with rotatory rope sheave and rotation rope sheave, around there being the elasticity rope on the rotatory rope sheave, around having on the rotation rope sheave the other end of leather rope.

Furthermore, the auxiliary mechanism comprises a classification cavity arranged in the lower cavity wall of the working cavity, a stopper cavity is arranged in the left cavity wall of the classification cavity, a stopper is arranged in the stopper cavity, the other end of the left end face of the stopper is fixedly connected with a stopper displacement spring fixedly connected with the left cavity wall of the stopper cavity, and the other end of the elastic rope is fixedly connected with the left end face of the stopper.

Further, the chamber wall still rotates about categorised chamber and is connected with categorised axis of rotation, categorised axis of rotation fixedly connected with rotates three hornblocks, around having in the categorised axis of rotation the other end of string, rotate three hornblock right-hand member face still fixedly connected with other end with categorised chamber right side chamber wall fixed connection's reduction torsion spring, still be equipped with the rigid fruit whereabouts chamber with external intercommunication in the chamber wall down before the categorised chamber, still be equipped with soft fruit whereabouts chamber in the chamber wall down behind the categorised chamber, chamber wall fixedly connected with buffering screw means is gone down to soft fruit whereabouts, the sorter downside is equipped with the case, the sorter up end still is equipped with the fruit standing groove, the sorter up end still two handles of fixedly connected with.

Further, signal spring force is greater than sprue reset spring, the elasticity rope is in the relaxed state, the elasticity rope is the elasticity rope, the leather rope is in the elasticity rope, expanding spring elasticity is greater than the reset torsion spring, leather rope elasticity is exactly the critical point of fruit hardness, when fruit is soft, this moment promote the piece can continue to move left under the effect of compression displacement piece for soft fruit has certain deformation, and then makes promote the piece and move left, and the gravity of fruit is greater than signal spring's elasticity.

The invention has the beneficial effects that: the device simple structure, the simple operation, the device is at first placed the device and is being about to carry out categorised fruit next door at normal during operation staff, then put into the device with fruit, the device can be filtered one by one according to the letter sorting mechanism of self this moment, later carry out the difference of fruit soft or hard degree through the device, the fruit that will divide simultaneously is carried out categorised and is placed, staff's intensity of labour has been reduced, staff's manpower allocation has been saved simultaneously, staff's work efficiency has been improved.

Drawings

In order to more clearly illustrate the embodiments of the 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, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure A-A of FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a schematic top view of the embodiment of FIG. 1;

FIG. 4 is a schematic diagram of the structure B-B in FIG. 1 according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of C-C of FIG. 1 according to an embodiment of the present invention;

fig. 6 is an enlarged schematic structural diagram at D in fig. 1 according to an embodiment of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-6, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The auxiliary equipment based on testing fruit hardness automatic classification comprises a classification device 10, wherein a sorting mechanism 70 for placing fruits one by one is arranged in the classification device 10, a driving mechanism 71 for providing device power is further arranged in the classification device 10, an auxiliary mechanism 72 for separating the fruits is further arranged in the classification device 10, the sorting mechanism 70 comprises a working chamber 50 which is also arranged in the classification device 10, a blocking block 16 is further arranged in the upper chamber wall of the working chamber 50, blocking block chambers 14 are further arranged in the left and right chamber walls of the blocking block 16, a blocking block 16 is arranged in the blocking block chamber 14, a blocking block return spring 15 is fixedly connected to the left end face of the blocking block 16, the other end of the blocking block return spring is fixedly connected with the left chamber wall of the blocking block chamber 14, a thick rope 13 is further fixedly connected to the left end face of the blocking block 16, and a schematic chamber 52 is further arranged in the lower chamber wall of the chamber 17 for the fruits, the utility model discloses a demonstration piece for the electric heating cooker, including the demonstration piece 52, be equipped with the demonstration piece 11 in the demonstration chamber 52, the 11 up end fixedly connected with of demonstration piece cushions 12, the 11 lower terminal surface fixedly connected with other end of demonstration piece with the demonstration spring 51 of the 52 lower chamber wall fixed connection of demonstration chamber, the 11 right terminal surface fixedly connected with of demonstration piece the other end of rope 13, still be equipped with the promotion chamber 68 of opening left in the 50 right side chamber walls of working chamber, it promotes piece 64 to be equipped with in the promotion chamber 68, it has pressure buffer pad 59 to promote 64 left terminal surface fixedly connected with of piece, it with promotion chamber 68 right side chamber wall fixed connection's expanding spring 60 to promote 64 right terminal surface fixedly connected with the other end of rope 38.

Beneficially, a control chamber 56 with an upward opening is arranged in the lower chamber wall of the pushing chamber 68, a control block 58 is arranged in the control chamber 56, the lower end face of the control block 58 is fixedly connected with a control spring 57, the other end of which is fixedly connected with the lower chamber wall of the control chamber 56, the lower end face of the control block 58 is also fixedly connected with an auxiliary contact 66, the lower chamber wall of the control chamber 56 is fixedly connected with a main contact 67, the upper chamber wall of the pushing chamber 68 is provided with a compression chamber 62, the compression chamber 62 is provided with a compression displacement block 63, the left end face of the compression displacement block 63 is fixedly connected with a compression spring 61, the other end of which is fixedly connected with the left chamber wall of the compression chamber 62, and the left end face.

Advantageously, the driving mechanism 71 includes a driven cavity 20 disposed in the sorting device 10, the driven cavity 20 is rotatably connected to a driven shaft 49 with the other end rotatably connected to the lower cavity wall of the working cavity 50, the driven shaft 49 disposed in the working cavity 50 is fixedly connected to a double sheave 44, the driven shaft 49 disposed in the driven cavity 20 is fixedly connected to a driven wheel 21, the driven cavity 20 is further disposed in the right cavity wall, a driving cavity 24 is disposed in the driving cavity 24, the upper cavity wall of the driving cavity 24 is fixedly connected to a motor 27, the motor 27 is dynamically connected to a power shaft 36, the power shaft 36 is fixedly connected to a local gear 28 engaged with the driven wheel 21, the power shaft 36 is connected to a cylindrical disk 25 through a spline, the lower cavity wall of the driving cavity 24 is rotatably connected to a fixed shaft 37, the fixed shaft 37 is fixedly connected to a rope winding wheel 39 and a circular disk 23, circular disc 23 up end fixedly connected with electro-magnet 22, around there being string 38 on the rope winding wheel 39, the chamber wall still rotates on the driving chamber 24 and is connected with rotation axis 30, rotation axis 30 fixedly connected with the rotatory gear 31 of local type gear 28 meshing, the up end fixedly connected with other end of rotatory gear 31 with the rotatory torsional spring 29 of chamber wall fixed connection on the driving chamber 24, rotation axis 30 still fixedly connected with rotatory rope sheave 32 and rotation rope sheave 34, around there being elastic rope 33 on the rotatory rope sheave 32, around having on the rotation rope sheave 34 the other end of leather rope 35.

Advantageously, the auxiliary mechanism 72 includes a classification chamber 40 disposed in the lower chamber wall of the working chamber 50, a stopper chamber 48 is disposed in the left chamber wall of the classification chamber 40, a stopper 45 is disposed in the stopper chamber 48, the left end surface of the stopper 45 is fixedly connected to a stopper displacement spring 47, the other end of which is fixedly connected to the left chamber wall of the stopper chamber 48, and the other end of the elastic cord 33 is also fixedly connected to the left end surface of the stopper 45.

Beneficially, chamber wall still rotates about categorised chamber 40 and is connected with categorised axis of rotation 42, categorised axis of rotation 42 fixedly connected with rotates three hornblocks 43, around having on the categorised axis of rotation 42 the other end of string 38, it still fixedly connected with other end and categorised chamber 40 right side chamber wall fixed connection's reset torsion spring 41 to rotate three hornblocks 43 right-hand member face, still be equipped with rigid fruit whereabouts chamber 69 with external intercommunication in the preceding lower chamber wall in categorised chamber 40, still be equipped with soft fruit whereabouts chamber 54 in the categorised chamber 40 back lower chamber wall, chamber 54 upper chamber wall fixedly connected with buffering screw means 55 is fallen to soft fruit, sorter 10 downside is equipped with case 53, sorter 10 up end still is equipped with fruit standing groove 19, sorter 10 up end still fixedly connected with two handles 26.

Beneficially, the elasticity of the indicating spring 51 is greater than that of the block return spring 15, the elastic rope 33 is in a relaxed state, the elastic rope 33 is an elastic rope, the leather rope 35 is an elastic rope, the elasticity of the extension spring 60 is greater than that of the return torsion spring 41, the elasticity of the leather rope 35 is just a critical point of the hardness of the fruit, when the fruit is soft, the pushing block 64 can continue to move leftwards under the action of the compression displacement block 63, so that the soft fruit has certain deformation, the pushing block 64 further moves leftwards, and the gravity of the fruit is greater than the elasticity of the indicating spring 51.

Sequence of mechanical actions of the whole device:

in the initial state: the driven wheel 21 is in mesh with the partial type gear 28, and the partial type gear 28 is in mesh with the rotary gear 31.

1: firstly, a worker holds the handle 26 with both hands to place the device beside a fruit to be detected in hardness, then pours the fruit into the fruit placing groove 19, at the moment, the fruit in the fruit placing groove 19 falls into the upper end face of the indicating block 11 in the cavity 17 through the fruit sliding channel 18, the fruit is not damaged under the action of the buffer cushion 12, meanwhile, the indicating block 11 moves downwards due to the gravity of the fruit to compress the indicating spring 51, so that the thick rope 13 is tensioned, the blocking block 16 moves leftwards, the fruit to be fallen into the cavity 17 is isolated, so that the device can detect the fruit one by one, at the moment, the motor 27 is started, and then the power shaft 36, the local gear 28 and the cylindrical disk 25 are driven to rotate, and then the driven wheel 21, the driven shaft 49 and the double grooved wheel 44 are driven to rotate, and then the fruit on the indicating block 11 is transferred to the stop block 45, at the moment, no fruit exists on the upper end face of the buffer soft cushion 12, so the schematic block 11 moves upwards to reset under the action of the schematic spring 51, the thick rope 13 is further loosened again, the block 16 moves rightwards to reset under the action of the block resetting spring 15, and the fruit falls on the upper end face of the buffer soft cushion 12 again to prepare for the next fruit detection;

2: when the driven wheel 21 does not rotate any more, the local gear 28 drives the rotating gear 31 to rotate, and further drives the rotating shaft 30, the rotating rope wheel 32 and the rotating rope wheel 34 to rotate, the rotating rope wheel 32 rotates to further cause the elastic rope 33 to be tightened, meanwhile, the rotating rope wheel 34 rotates to further cause the leather rope 35 to be tightened, the leather rope 35 is tightened to further cause the compression displacement block 63 to move leftwards, and further the pushing block 64 moves leftwards, and further the pressure buffer cushion 59 is in contact with the surface of the fruit, when the leather rope 35 continues to be tightened, if the hardness of the fruit is higher than a critical point, at the moment, the pushing block 64 does not move any more, at the moment, the elastic rope 33 is just tightened, and further the block 45 moves leftwards, so that the fruit on the upper end surface of the block 45 falls on the rotating triangular block 43, then the fruit falls downwards along the hard fruit falling cavity 69 due to the structure of the rotating triangular block 43, and, if the fruit is soft, the hardness of the fruit cannot prevent the pushing block 64 from moving leftwards continuously, so that the pushing block 64 presses the control block 58 downwards, so that the auxiliary contact 66 is in contact with the main contact 67, so that the electromagnet 22 is electrified, at the moment, the cylindrical disc 25 moves downwards and is sucked, at the moment, due to the rotation of the cylindrical disc 25, the circular disc 23, the fixed shaft 37 and the rope winding wheel 39 are driven to rotate, so that the thin rope 38 is tensioned, at the moment, the rotating triangular block 43 rotates backwards, at the moment, the elastic rope 33 is tensioned just, so that the block 45 moves leftwards, so that the fruit on the upper end face of the block 45 falls into the box 53 which is placed at the lower side of the sorting device 10 in advance through the buffer effect of the buffer screw device 55 after falling on the rotating triangular block 43, so that the collection of the soft fruit is completed, when the local gear 28 drives the driven wheel, at the moment, the rotating gear 31 is not meshed with the local gear 28 any more, at the moment, the rotating shaft 30 reversely rotates and resets under the action of the rotating torsion spring 29, so that the elastic rope 33 and the leather rope 35 are loosened again, at the same time, the leather rope 35 is loosened, so that the compression displacement block 63 moves rightwards and resets under the action of the compression spring 61, the pushing block 64 moves rightwards and resets under the action of the expansion spring 60, when the pushing block 64 moves rightwards, the control block 58 moves upwards and resets under the action of the control spring 57, at the moment, the auxiliary contact 66 is separated from the main contact 67, so that the electromagnet 22 is powered off, at the moment, the cylindrical disc 25 is not attracted with the electromagnet 22 any more, so that the circular disc 23 is not driven to rotate any more, so that the rotating triangular block 43 reversely rotates and resets under the action of the reset.

3: if the classification is finished, the motor 27 is turned off at this time, and then the worker holds the handle 26 to take the device away, and then the worker does the next pricing work to complete the work.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an auxiliary assembly based on test fruit hardness automatic classification, includes sorter, its characterized in that: the fruit sorting device is characterized in that a sorting mechanism for placing the fruits one by one is arranged in the sorting device, a driving mechanism for providing power for the device is further arranged in the sorting device, an auxiliary mechanism for separating the fruits is further arranged in the sorting device, the sorting mechanism comprises a working cavity which is also arranged in the sorting device, a block is further arranged in the upper cavity wall of the working cavity, block cavities are further arranged in the left cavity wall and the right cavity wall of the block, a block is arranged in the block cavity, the left end surface of the block is fixedly connected with a block reset spring of which the other end is fixedly connected with the left cavity wall of the block cavity, the left end surface of the block is also fixedly connected with a thick rope, a schematic cavity is further arranged in the lower cavity wall of the schematic cavity, a schematic block is arranged in the schematic cavity, a buffer cushion is fixedly connected with the upper end surface of the block, and a schematic spring of which the other end is fixedly connected with the lower, the indicating block right end face is fixedly connected with the other end of the thick rope, a pushing cavity with a left opening is further arranged in the working cavity right cavity wall, a pushing block is arranged in the pushing cavity, a pressure buffering pad is fixedly connected with the pushing block left end face, the other end of the pushing block right end face is fixedly connected with a telescopic spring fixedly connected with the pushing cavity right cavity wall, and the other end of the thin rope is fixedly connected with the pushing block right end face.

2. The auxiliary device for automatic classification based on fruit hardness test according to claim 1, wherein: the improved pneumatic control device is characterized in that a control cavity with an upward opening is arranged in the lower cavity wall of the pushing cavity, a control block is arranged in the control cavity, the other end of the end face fixedly connected with the control spring is fixedly connected with the lower cavity wall of the control cavity, the auxiliary contact is fixedly connected with the lower end face of the control block, the main contact is fixedly connected with the lower cavity wall of the control cavity, a compression cavity is arranged in the upper cavity wall of the pushing cavity, a compression displacement block is arranged in the compression cavity, the other end of the left end face fixedly connected with the other end of the compression displacement block is fixedly connected with the compression spring, and a leather rope is fixedly connected with the left end.

3. The auxiliary device for automatic classification based on fruit hardness test according to claim 1, wherein: the driving mechanism comprises a driven cavity which is arranged in the sorting device, the upper cavity wall of the driven cavity is rotatably connected with a driven shaft, the other end of the driven shaft is rotatably connected with the lower cavity wall of the working cavity, the driven shaft which is arranged in the working cavity is fixedly connected with a double-grooved pulley, the driven shaft which is arranged in the driven cavity is fixedly connected with a driven wheel, the right cavity wall of the driven cavity is also internally provided with a driving cavity, the upper cavity wall of the driving cavity is fixedly connected with a motor, the motor is in power connection with a power shaft, the power shaft is fixedly connected with a local gear which is meshed with the driven wheel, the power shaft is connected with a cylindrical disc through a spline, the lower cavity wall of the driving cavity is rotatably connected with a fixed shaft, the fixed shaft is fixedly connected with a rope winding wheel and a circular disc, the upper, the wall of drive chamber upper chamber still rotates and is connected with the rotation axis, rotation axis fixedly connected with local type gear engagement's rotating gear, the rotating gear up end fixedly connected with other end with wall fixed connection's rotatory torsional spring on the drive chamber, rotation axis still fixedly connected with rotatory rope sheave and rotation rope sheave, around there being the elasticity rope on the rotatory rope sheave, around having on the rotation rope sheave the other end of leather rope.

4. The auxiliary device for automatic classification based on fruit hardness test according to claim 1, wherein: the auxiliary mechanism comprises a classification cavity arranged in the lower cavity wall of the working cavity, a stopper cavity is arranged in the left cavity wall of the classification cavity, a stopper is arranged in the stopper cavity, the other end of the left end face of the stopper is fixedly connected with a stopper displacement spring fixedly connected with the left cavity wall of the stopper cavity, and the other end of the elastic rope is fixedly connected with the left end face of the stopper.

5. The auxiliary device for automatic classification based on fruit hardness test according to claim 1, wherein: categorised chamber left and right sides chamber wall still rotates and is connected with categorised axis of rotation, categorised axis of rotation fixedly connected with rotates three hornblocks, around having in the categorised axis of rotation the other end of string, rotate three hornblock right-hand member face still fixedly connected with other end with categorised chamber right side chamber wall fixed connection's reduction torsion spring, still be equipped with in the chamber wall under the categorised chamber front and down and fall the chamber with the rigid fruit of external intercommunication, still be equipped with soft fruit and fall the chamber under the categorised chamber back in the chamber wall, chamber upper wall fixedly connected with buffering screw means falls in soft fruit, the sorter downside is equipped with the case, the sorter up end still is equipped with the fruit standing groove, the sorter up end is two handles of fixedly connected with still.

6. The auxiliary device for automatic classification based on fruit hardness test according to claim 1, wherein: the signal spring force is greater than sprue reset spring, the elasticity rope is in the relaxed state, the elasticity rope is the elasticity rope, the leather rope is in the elasticity rope, extension spring elasticity is greater than reset torsion spring, leather rope elasticity is exactly the critical point of fruit hardness, when fruit is soft, this moment promote the piece and can be in continue to move left under the effect of compression displacement piece for soft fruit has certain deformation, and then makes it moves left to promote the piece, and the gravity of fruit is greater than the elasticity of signal spring.