CN211087367U - Belt wheel, sheet medium conveying mechanism and cash recycling device - Google Patents

Abstract

The utility model relates to the technical field of flake medium processing, in particular to a belt wheel, a flake medium conveying mechanism and a cash recycling device, wherein the belt wheel comprises a wheel body, a first blocking piece and a second blocking piece, the wheel body comprises a first section, a supporting section and a second section which are sequentially arranged along the axial direction of the wheel body, the outer diameter of the first section and the outer diameter of the second section are both smaller than the outer diameter of the supporting section, and the supporting section is used for supporting a conveying belt; the first blocking piece is connected with the first section, a first groove is formed among the first blocking piece, the first section and the supporting section, the second blocking piece is connected with the second section, and a second groove is formed among the second blocking piece, the second section and the supporting section. The sheet-like medium conveying mechanism includes the pulley, and the cash recycling device includes the pulley or the sheet-like medium conveying mechanism.

Description

Belt wheel, sheet medium conveying mechanism and cash recycling device

Technical Field

The utility model relates to a thin slice class medium processing technology field especially relates to a band pulley, thin slice class medium conveying mechanism and cash circulation processing apparatus.

Background

Sheet media processing apparatuses such as printers, scanners, automatic ticket detectors, and banknote sorting machines generally need to be provided with a conveying mechanism for conveying sheet media, and sheet media (hereinafter, referred to as media) such as documents, tickets, and banknotes are moved by the conveying mechanism, and simultaneously, processing mechanisms such as a printing mechanism, a magnetic reading mechanism, or a scanning mechanism perform processing operations such as printing, magnetic reading, or scanning on the media.

The thin slice class medium conveying mechanism that correlation technique provided includes two band pulleys and conveyer belt, and two band pulleys set up along medium direction of delivery interval, and the conveyer belt is supported jointly by two band pulleys, and the band pulley is provided with two along axial both ends and keeps off the piece, and two of band pulley are located to the conveyer belt cover keep off between the piece, keep off the piece and be used for preventing conveyer belt and band pulley and break away from, but, even set up and keep off the piece back, under the conveyer belt condition of walking partially, the conveyer belt easily climbs and keeps off the piece, and then the problem that conveyer.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a band pulley, sheet class medium conveying mechanism and cash circulation processing apparatus to solve the sheet class medium conveying mechanism among the relevant art, under the condition that the conveyer belt wanders partially, the conveyer belt easily climbs the fender piece, and then leads to the problem that conveyer belt and band pulley break away from.

In one aspect, the utility model provides a belt pulley, this belt pulley includes:

the wheel body comprises a first section, a supporting section and a second section which are sequentially arranged along the axial direction of the wheel body, the outer diameter of the first section and the outer diameter of the second section are smaller than the outer diameter of the supporting section, and the supporting section is used for supporting the conveying belt;

the first stopper is connected with the first section, a first groove is formed among the first stopper, the first section and the supporting section, the second stopper is connected with the second section, and a second groove is formed among the second stopper, the second section and the supporting section.

As a preferable technical solution of the pulley, the outer diameters of the first stopper and the second stopper are not smaller than the outer diameter of the support section.

As a preferable technical solution of the pulley, the first stopper and the second stopper are symmetrically disposed about a length center of the pulley body, and the first groove and the second groove are symmetrically disposed about the length center of the pulley body.

As a preferable technical solution of the pulley, the first stopper, the second stopper, and the pulley body are integrally formed.

As a preferable technical solution of the pulley, the pulley body further includes a protruding portion disposed on the outer peripheral surface of the supporting section, and the protruding portion is centrally located between the first groove and the second groove.

On the other hand, the utility model provides a thin slice class medium conveying mechanism, including driving wheel subassembly, conveyer belt and at least one driven wheel subassembly, driving wheel subassembly and at least one follow the interval of driving wheel subassembly along the medium direction of delivery and set up, the conveyer belt by driving wheel subassembly with follow the common support of driving wheel subassembly, wherein, driving wheel subassembly with at least one in the driven wheel subassembly includes the band pulley in arbitrary above-mentioned scheme.

As a preferred technical scheme of the sheet medium conveying mechanism, the driving wheel assembly comprises a driving wheel mandrel, and a first driving wheel and a second driving wheel which are sleeved on the driving wheel mandrel at intervals, the driven wheel assembly comprises a driven wheel mandrel, and a first driven wheel and a second driven wheel which are sleeved on the driven wheel mandrel at intervals, the first driving wheel and the first driven wheel are correspondingly arranged along the medium conveying direction, and the second driving wheel and the second driven wheel are correspondingly arranged along the medium conveying direction;

the sheet medium conveying mechanism comprises two conveying belts arranged at intervals, one of the two conveying belts is supported by the first driving wheel and the first driven wheel, the other of the two conveying belts is supported by the second driving wheel and the second driven wheel, at least one of the first driving wheel and the first driven wheel is the belt wheel, and at least one of the second driving wheel and the second driven wheel is the belt wheel.

As a preferable technical solution of the sheet-like medium conveying mechanism, the belt wheel is sleeved with the conveyor belt and is located between the first groove and the second groove, the width of the conveyor belt is greater than the width and depth of the first groove and the width and depth of the second groove, and the thickness of the conveyor belt is smaller than the widths of the first groove and the second groove.

As a preferable technical solution of the sheet-like medium conveying mechanism, the outer diameters of the first stopper and the second stopper are not smaller than the outer diameter of the support section, the thickness of the conveyor belt is not greater than the difference between the outer ring radius of the first stopper and the outer ring radius of the support section, and the thickness of the conveyor belt is not greater than the difference between the outer ring radius of the second stopper and the outer ring radius of the support section.

In another aspect, the present invention provides a cash recycling device including the belt wheel according to any one of the above aspects or the sheet-like medium conveying mechanism according to any one of the above aspects.

The utility model has the advantages that:

the utility model provides a belt wheel, which comprises a wheel body, a first stopper and a second stopper, wherein the wheel body comprises a first section, a supporting section and a second section which are arranged along the axial direction of the wheel body in sequence, the outer diameter of the first section and the outer diameter of the second section are both smaller than the outer diameter of the supporting section, and the supporting section is used for supporting a conveying belt; the first stopper is connected with the first section, a first groove is formed among the first stopper, the first section and the supporting section, the second stopper is connected with the second section, and a second groove is formed among the second stopper, the second section and the supporting section. When the conveyor belt deviates, the part of the conveyor belt falls into the first groove or the second groove, so that the problem that the conveyor belt is separated from the wheel body after passing through the first blocking piece or the second blocking piece can be avoided.

The utility model also provides a thin slice class medium conveying mechanism, including driving wheel subassembly, conveyer belt and at least one driven wheel subassembly, driving wheel subassembly and at least one driven wheel subassembly set up along medium direction of delivery interval, and the conveyer belt is supported by driving wheel subassembly and driven wheel subassembly jointly, and wherein, at least one in driving wheel subassembly and the driven wheel subassembly includes above-mentioned band pulley to can avoid the conveyer belt can not break away from driving wheel subassembly or driven wheel subassembly, guarantee thin slice class medium conveying mechanism and can carry the medium steadily.

The utility model also provides a cash circulation processing apparatus, including above-mentioned band pulley or above-mentioned thin slice class medium conveying mechanism, guarantee that cash circulation processing apparatus can carry paper currency steadily.

Drawings

FIG. 1 is a schematic view of a cash recycling device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a sheet-like medium conveying mechanism in an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structure view of a sheet-type medium conveying mechanism according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the belt wheel in the embodiment of the present invention;

fig. 5 is a schematic partial structural view of a sheet-like medium conveying mechanism according to an embodiment of the present invention.

In the figure:

100-a coin-in mechanism; 200-a coin outlet mechanism; 300-a temporary storage mechanism; 400-a safe case; 500-money box; 600-checking box; 700-a recycling bin; 800-a cash discriminator mechanism; 900-a delivery channel;

901-main transport lane; 902-a first transition channel; 903-a second transition passage; 904-third transition channel; 905-a fourth transition channel; 906-a fifth transition channel;

1-a belt wheel; 11-a wheel body; 111-first stage; 112-a support section; 113-a second segment; 114-a boss; 12-a first stop; 13-a second stop; 14-a first groove; 15-a second groove;

2-a driving wheel assembly; 21-driving wheel mandrel; 22-a first capstan; 23-a second driving wheel;

3-a driven wheel assembly; 31-driven wheel spindle; 32-a first driven wheel; 33-a second driven wheel; 34-a bearing;

4-a conveyor belt;

5-driving the motor.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Fig. 1 is a schematic structural diagram of a cash recycling device according to an embodiment of the present invention, please refer to fig. 1, which provides a cash recycling device, wherein a sheet medium to be processed is a banknote, the cash recycling device includes a banknote input mechanism 100, a banknote output mechanism 200, a temporary storage mechanism 300, a safe 400, a banknote box 500, a counting box 600, a recycling box 700, a banknote identifying mechanism 800, and a conveying path 900, wherein the banknote identifying mechanism 800 is disposed in the conveying path 900, and a driving mechanism is used for driving the banknote to move in the conveying path 900.

Specifically, the transport path 900 includes a main transport path 901, and the depositing mechanism 100, the dispensing mechanism 200, the temporary storage mechanism 300, the bill discriminating mechanism 800, and the main transport path 901 are located at an upper portion of the cash recycling apparatus, the depositing mechanism 100 being configured to receive the bills deposited by the user, the bill discriminating mechanism 800 being configured to discriminate the denomination, and authenticity, etc. of the bills, the temporary storage mechanism 300 being configured to temporarily store the bills, and the dispensing mechanism 200 being configured to dispense the bills. The safe 400 is located at the lower part of the cash recycling device, and the cash box 500, the counting box 600 and the recycling box 700 are all arranged in the safe 400. The number of the banknote boxes 500 is three, the number of the counting boxes 600 is one, and the number of the recycling boxes 700 is one. The bill cassette 500 is used for storing bills, and the counting cassette 600 is used for performing counting operation and also used for storing bills. The recycling bin 700 is used to recycle old versions or banknotes that are no longer in circulation with surface defects.

The conveyance channel 900 further includes a first transition channel 902, a second transition channel 903, a third transition channel 904, a fourth transition channel 905, and a fifth transition channel 906. The three cash boxes 500 are respectively communicated with the main conveying passage 901 through a first transition passage 902, a second transition passage 903 and a third transition passage 904, the counting box 600 is communicated with the main conveying passage 901 through a fourth transition passage 905, and the recycling box 700 is communicated with the main conveying passage 901 through a fifth transition passage 906.

When a deposit transaction is performed, a user puts paper money at a paper money inlet of the paper money inlet mechanism 100, the paper money is fed into the main conveying channel 901 one by the paper money stacking and separating mechanism arranged at the paper money inlet, and is conveyed to the paper money discriminating mechanism 800 by the driving mechanism in the main conveying channel 901, the paper money discrimination mechanism 800 performs paper money recognition, and the paper money recognized as qualified by the paper money discriminating mechanism 800 is conveyed to the temporary storage mechanism 300 by the driving mechanism in the main conveying channel 901 and is temporarily reserved for the user to confirm; the banknotes recognized as defective by the banknote classification section 800 are transported from the main transport path 901 to the banknote outlet of the banknote dispensing section 200 by the drive section, and are retrieved by the user.

When the deposit is confirmed, the paper money temporarily stored in the temporary storage mechanism 300 is conveyed from the main conveying channel 901 to the paper money discriminating mechanism 800 by the driving mechanism for paper money discrimination, the paper money which is recognized as being unsuitable for circulation, such as old version or paper money with surface defects, is conveyed from the main conveying channel 901 to the recycling box 700 by the driving mechanism through the fifth transition channel 906 for storage, and the paper money which is recognized as being capable of normally circulating is conveyed from the main conveying channel 901 to the paper money box 500 by the driving mechanism through the first transition channel 902, the second transition channel 903 or the third transition channel 904 for storage; when the deposit is cancelled, the shutter of the escrow mechanism 300 is opened so that the user can take out the banknotes temporarily held by the escrow mechanism 300.

When a withdrawal service is performed, a user inputs a withdrawal amount, banknotes in the banknote cassette 500 are fed into the main conveying passage 901 one by the banknote stacking and separating mechanism arranged at the cassette port of the banknote cassette 500, are conveyed to the banknote discriminating mechanism 800 by the driving mechanism in the main conveying passage 901, are counted by the banknote discriminating mechanism 800 and are conveyed to the banknote dispensing mechanism 200 by the driving mechanism, and when all the banknotes input by the user to the withdrawal amount reach the banknote dispensing mechanism 200, the shutter of the banknote dispensing mechanism 200 is opened, so that the user can take out the banknotes from the banknote dispensing port of the banknote dispensing mechanism 200.

When the banknotes in a certain banknote box 500 need to be checked, the banknotes stored in the banknote box 500 are conveyed to a transition passage connected with the banknote box 500, pass through the transition passage to reach a main conveying passage 901, are conveyed to the banknote identifying mechanism 800 by the driving mechanism, are checked by the banknote identifying mechanism 800, and are input into the checking box 600 from the main conveying passage 901 to a fourth transition passage 905 by the driving mechanism for storage.

Fig. 2 is a schematic structural diagram of a sheet-like medium conveying mechanism in an embodiment of the present invention; fig. 3 is a schematic cross-sectional structure view of a sheet-type medium conveying mechanism according to an embodiment of the present invention; referring to fig. 2 and fig. 3, the present embodiment further provides a sheet-like medium conveying mechanism, which can be used for conveying sheet-like media, such as documents, bills, paper money, and the like, and the sheet-like medium conveying mechanism is disposed on the cash recycling processing apparatus and used for conveying paper money in the present embodiment, for detailed description, wherein in the cash recycling processing apparatus, the main conveying channel 901, the first transition channel 902, the second transition channel 903, the third transition channel 904, the fourth transition channel 905, and the fifth transition channel 906 all include the sheet-like medium conveying mechanism. Specifically, the sheet medium conveying mechanism comprises a driving wheel assembly 2, a conveying belt 4 and at least one driven wheel assembly 3, wherein the driving wheel assembly 2 and the at least one driven wheel assembly 3 are arranged at intervals along the medium conveying direction, and the conveying belt 4 is supported by the driving wheel assembly 2 and the driven wheel assembly 3 together. It should be noted that the number of the driven wheel assemblies 3 can be set according to actual needs, and referring to fig. 3, the embodiment exemplarily shows that the number of the driven wheel assemblies 3 is plural.

Fig. 4 is a schematic structural view of the belt pulley 1 in the embodiment of the present invention; fig. 5 is a schematic partial structural view of a sheet-like medium conveying mechanism according to an embodiment of the present invention. At least one of the primary pulley assembly 2 and the secondary pulley assembly 3 comprises a pulley 1 as shown in fig. 4 or 5.

Because the sheet medium conveying mechanism provided by the related art only prevents the conveying belt from being separated from the belt wheel through the two stoppers, the conveying belt easily climbs the stoppers under the condition that the conveying belt deviates, and then the technical problem that the conveying belt is separated from the belt wheel occurs. The pulley 1 provided in this embodiment includes a pulley body 11, a first stopper 12, and a second stopper 13, where the pulley body 11 includes a first section 111, a supporting section 112, and a second section 113 that are sequentially arranged along an axial direction of the pulley body 11, an outer diameter of the first section 111 and an outer diameter of the second section 113 are both smaller than an outer diameter of the supporting section 112, and the supporting section 112 is used for supporting the conveyor belt 4; the first stopper 12 is connected to the first segment 111, a first groove 14 is formed among the first stopper 12, the first segment 111 and the supporting segment 112, the second stopper 13 is connected to the second segment 113, and a second groove 15 is formed among the second stopper 13, the second segment 113 and the supporting segment 112. By providing the first groove 14 and the second groove 15, when the conveyor belt 4 is deviated, a portion of the conveyor belt 4 will fall into the first groove 14 or the second groove 15, so that the conveyor belt 4 can be prevented from being separated from the wheel body 11 after passing over the first stopper 12 or the second stopper 13, and therefore, the above technical problem can be effectively solved.

Optionally, the driving wheel assembly 2 includes a driving wheel spindle 21, and a first driving wheel 22 and a second driving wheel 23 sleeved on the driving wheel spindle 21 at intervals, the driven wheel assembly 3 includes a driven wheel spindle 31 and a first driven wheel 32 and a second driven wheel 33 sleeved on the driven wheel spindle 31 at intervals, the first driving wheel 22 and the first driven wheel 32 are correspondingly arranged along the medium conveying direction, and the second driving wheel 23 and the second driven wheel 33 are correspondingly arranged along the medium conveying direction; the sheet medium conveying mechanism comprises two conveying belts 4 arranged at intervals, one of the two conveying belts 4 is jointly supported by a first driving wheel 22 and a first driven wheel 32, the other conveying belt 4 is jointly supported by a second driving wheel 23 and a second driven wheel 33, wherein at least one of the first driving wheel 22 and the first driven wheel 32 is a belt wheel 1, and at least one of the second driving wheel 23 and the second driven wheel 33 is a belt wheel 1. It can be understood that in the present embodiment, the first driving wheel 22 and the second driving wheel 23 are arranged at intervals along the axial direction of the driving wheel spindle 21, and the second driving wheel 23 and the second driven wheel 33 are arranged at intervals along the axial direction of the driven wheel spindle 31. The driving wheel component 2 and the driven wheel component 3 are connected through the two conveyor belts 4, so that stable conveying of paper money along the medium conveying direction can be guaranteed. It is to be noted that, in the embodiment thereof, the number of the second driving wheels 23 may be set to be plural, and correspondingly, the number of the second driven wheels 33 may also be set to be plural, and the plural second driving wheels 23 and the plural second driven wheels 33 are provided in one-to-one correspondence in the medium conveying direction, and each second driving wheel 23 and the corresponding second driven wheel 33 are connected by the conveying belt 4.

Optionally, when the first driving wheel 22 or the second driving wheel 23 is the belt wheel 1, the belt wheel 1 is fixedly sleeved on the driving wheel spindle 21, preferably, the driving wheel spindle 21 is in transmission connection with the driving motor 5, the driving motor 5 drives the driving wheel spindle 21 to rotate so as to drive the belt wheel 1 to rotate, and then drives the corresponding first driven wheel 32 or the corresponding second driven wheel 33 to rotate through the conveyor belt 4. Referring to fig. 5, when the first driven wheel 32 or the second driven wheel 33 is the pulley 1, the bearing 34 is further inserted into the inner ring of the pulley 1, and the inner ring of the bearing 34 is fixedly sleeved with the driven pulley spindle 31, so that the pulley 1 can be rotatably disposed on the driven pulley spindle 31 through the bearing 34. In other embodiments, the driven wheel spindle 31 can also be rotatably disposed on the machine body, and the pulley 1 is fixedly sleeved on the driven wheel spindle 31.

Optionally, the conveyor belt 4 is sleeved on the pulley 1 and located between the first groove 14 and the second groove 15, the width of the conveyor belt 4 is greater than the width and depth of the first groove 14 and the width and depth of the second groove 15, and the thickness of the conveyor belt 4 is smaller than the widths of the first groove 14 and the second groove 15. By making the thickness of the conveyor belt 4 smaller than the width of the first groove 14 and the second groove 15, the conveyor belt 4 can smoothly drop into the first groove 14 or the second groove 15 when the conveyor belt 4 is deviated, and the conveyor belt 4 is prevented from crossing the grooves and climbing the stopper, so that the conveyor belt 4 is prevented from separating from the wheel body 11. Through making the width of conveyer belt 4 be greater than the width and the degree of depth of first recess 14 and the width and the degree of depth of second recess 15, under the condition that conveyer belt 4 wanders away partially, conveyer belt 4 is even partly drop to first recess 14 or second recess 15, but conveyer belt 4 still can have partly still to be located the support section 112 of band pulley 1, and then drive wheel assembly 2 and follow driving wheel assembly 3 still can normal operating, guarantee normal transport function.

Alternatively, neither the first flights 12 nor the second flights 13 have an outer diameter smaller than the outer diameter of the support section 112, the thickness of the conveyor belt 4 is no greater than the difference between the outer radius of the first flights 12 and the outer radius of the support section 112, and the thickness of the conveyor belt 4 is no greater than the difference between the outer radius of the second flights 13 and the outer radius of the support section 112. With this arrangement, the outer circumferential surface of the conveyor belt 4 is not higher than the outer circumferential surfaces of the first stopper 12 and the second stopper 13, and the conveyor belt 4 can be limited in the axial direction of the wheel body 11 by the first stopper 12 and the second stopper 13.

Alternatively, the first stopper 12 and the second stopper 13 are symmetrically disposed about the length center of the wheel body 11, and the first groove 14 and the second groove 15 are symmetrically disposed about the length center of the wheel body 11.

Optionally, the first stopper 12, the second stopper 13 and the wheel 11 are integrally formed, so as to facilitate installation. Of course, the first stopper 12, the second stopper 13, and the wheel 11 may be provided separately.

Referring to fig. 5, optionally, the wheel body 11 further includes a protrusion 114 disposed on the outer circumferential surface of the supporting section 112, and the protrusion 114 is centered between the first groove 14 and the second groove 15. The conveyor belt 4 can be effectively prevented from running out by providing the projection 114. Preferably, the outer diameter of the protruding portion 114 gradually decreases from the middle to both ends, the outer circumferential surface of the protruding portion 114 is an ellipsoid, and further preferably, the protruding portion 114 is integrally provided with the support section 112.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A pulley, comprising:

the wheel body (11) comprises a first section (111), a supporting section (112) and a second section (113) which are sequentially arranged along the axial direction of the wheel body (11), the outer diameter of the first section (111) and the outer diameter of the second section (113) are smaller than the outer diameter of the supporting section (112), and the supporting section (112) is used for supporting the conveyor belt (4);

the first stopper (12) is connected with the first section (111), a first groove (14) is formed among the first stopper (12), the first section (111) and the support section (112), the second stopper (13) is connected with the second section (113), and a second groove (15) is formed among the second stopper (13), the second section (113) and the support section (112).

2. The pulley according to claim 1, characterized in that neither said first flight (12) nor said second flight (13) has an outer diameter smaller than the outer diameter of said support section (112).

3. A pulley according to claim 1, characterized in that said first stop (12) and said second stop (13) are arranged symmetrically with respect to the length center of the wheel body (11), said first groove (14) and said second groove (15) being arranged symmetrically with respect to the length center of the wheel body (11).

4. A pulley according to claim 1, characterized in that said first stopper (12), said second stopper (13) and said wheel body (11) are all formed in one piece.

5. A pulley according to claim 1, characterized in that said wheel body (11) further comprises a raised portion (114) provided on the outer circumferential surface of said supporting section (112), said raised portion (114) being centrally located between said first groove (14) and said second groove (15).

6. A sheet-like medium conveying mechanism comprising a driving wheel assembly (2), a conveying belt (4) and at least one driven wheel assembly (3), the driving wheel assembly (2) and the at least one driven wheel assembly (3) being disposed at intervals in a medium conveying direction, the conveying belt (4) being supported by both the driving wheel assembly (2) and the driven wheel assembly (3), wherein at least one of the driving wheel assembly (2) and the driven wheel assembly (3) comprises the pulley (1) of any one of claims 1 to 5.

7. The sheet-like medium conveying mechanism according to claim 6, wherein the driving wheel assembly (2) comprises a driving wheel spindle (21) and a first driving wheel (22) and a second driving wheel (23) which are sleeved on the driving wheel spindle (21) at intervals, the driven wheel assembly (3) comprises a driven wheel spindle (31) and a first driven wheel (32) and a second driven wheel (33) which are sleeved on the driven wheel spindle (31) at intervals, the first driving wheel (22) and the first driven wheel (32) are correspondingly arranged along the medium conveying direction, and the second driving wheel (23) and the second driven wheel (33) are correspondingly arranged along the medium conveying direction;

the sheet medium conveying mechanism comprises two conveying belts (4) arranged at intervals, one of the two conveying belts (4) is jointly supported by a first driving wheel (22) and a first driven wheel (32), the other conveying belt (4) is jointly supported by a second driving wheel (23) and a second driven wheel (33), at least one of the first driving wheel (22) and the first driven wheel (32) is the belt wheel (1), and at least one of the second driving wheel (23) and the second driven wheel (33) is the belt wheel (1).

8. The sheet-like medium conveying mechanism according to claim 6, wherein the belt (4) is sleeved on the pulley (1) and located between the first groove (14) and the second groove (15), the width of the belt (4) is greater than the width and depth of the first groove (14) and the width and depth of the second groove (15), and the thickness of the belt (4) is smaller than the widths of the first groove (14) and the second groove (15).

9. The sheet-like medium conveying mechanism according to claim 6, wherein the outer diameters of the first stopper (12) and the second stopper (13) are not smaller than the outer diameter of the support section (112), the thickness of the conveyor belt (4) is not greater than the difference between the outer ring radius of the first stopper (12) and the outer ring radius of the support section (112), and the thickness of the conveyor belt (4) is not greater than the difference between the outer ring radius of the second stopper (13) and the outer ring radius of the support section (112).

10. A cash recycling device comprising the pulley (1) according to any one of claims 1 to 5 or the sheet-like medium conveyance mechanism according to any one of claims 6 to 9.

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