CN211288637U

CN211288637U - Transmission mechanism with boundary crossing protection function and financial equipment

Info

Publication number: CN211288637U
Application number: CN201921241810.0U
Authority: CN
Inventors: 郭灿照
Original assignee: Shenzhen Yihua Computer Co Ltd; Shenzhen Yihua Time Technology Co Ltd; Shenzhen Yihua Financial Intelligent Research Institute
Current assignee: Shenzhen Yihua Computer Co Ltd; Shenzhen Yihua Time Technology Co Ltd; Shenzhen Yihua Financial Intelligent Research Institute
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-08-18
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses a transmission mechanism with border crossing protection function and financial equipment, the transmission mechanism comprises a rack capable of reciprocating, a gear for driving the rack to reciprocate and a protection unit for preventing the gear from crossing the rack; the rack comprises a transmission part and a boundary part connected to the end part of the transmission part; the protection unit comprises a moving device and a detection device, wherein the moving device is at least partially overlapped with the boundary part of the rack and reciprocates along with the rack; the gear is meshed with the boundary part and simultaneously contacts with and drives the moving device to move, and the detection device is used for detecting the moving device which moves after contacting with the gear so as to send out a trigger instruction for changing the motion state of the gear. The utility model discloses a drive mechanism and financial equipment with protect function transboundary aims at improving security and stability among the rack and pinion transmission process.

Description

Transmission mechanism with boundary crossing protection function and financial equipment

Technical Field

The utility model relates to a transmission equipment field, concretely relates to drive mechanism and financial equipment with protect function transboundary.

Background

Among the present financial module, used this kind of reciprocating transmission mode of rack and pinion a large number, used motor drive gear to rotate, rack and pinion structure converts reciprocating motion of reciprocating motion module into. The existing rack scheme (linear type, arc) does not have a terminal protection scheme, and if the drive control is improper, two consequences can be caused: 1. the driving motor is stuck and damaged, or the reciprocating module structure is damaged, or the rack and the gear are damaged by gear beating. 2. The rack module exceeds the range, so that the gear cannot rotate in the reverse direction to enable the rack module to return to the original position.

SUMMERY OF THE UTILITY MODEL

For overcoming the not enough of prior art, the utility model provides a drive mechanism and financial equipment with protect function transboundary aims at improving the security and the stability of rack and pinion transmission in-process.

The utility model provides a transmission mechanism with border crossing protection function, which comprises a rack capable of reciprocating, a gear for driving the rack to reciprocate and a protection unit for preventing the gear from crossing the rack; the rack comprises a transmission part and a boundary part connected to the end part of the transmission part; the protection unit comprises a moving device and a detection device, wherein the moving device is at least partially overlapped with the boundary part of the rack and reciprocates along with the rack; the gear is meshed with the boundary part and simultaneously contacts with and drives the moving device to move, and the detection device is used for detecting the moving device which moves after contacting with the gear so as to send out a trigger instruction for changing the motion state of the gear.

Preferably, the moving device comprises a lifting assembly, the lifting assembly is arranged on the side part of the boundary part in an overlapping manner, and the detection device is arranged at the bottom of the lifting assembly at intervals and is relatively fixed with the boundary part; the lifting assembly can reciprocate along with the boundary part and can move towards the detection device relative to the boundary part under the driving of the gear; and the detection device sends out a trigger instruction when detecting the liftable component.

Preferably, the moving device further comprises a housing fixedly overlapped on the side of the boundary part and an elastic part arranged in the housing; the detection device is fixedly arranged at the bottom position in the shell; the lifting components are arranged in the shell above the detection device at intervals and can move towards the detection device under the contact drive of the gear relative to the shell; one end of the elastic piece is connected with the lifting assembly, the other end of the elastic piece is connected with the shell, and the elastic piece is used for pushing the lifting assembly to be away from the detection device.

Preferably, be equipped with first teeth of a cogwheel on the rack, be equipped with on the gear can with the second teeth of a cogwheel of first teeth of a cogwheel meshing, but lifting unit is including locating first elevating platform in the casing and locating first elevating platform surface can with the third teeth of a cogwheel of second teeth of a cogwheel meshing the gear contact and drive before the lifting unit, part the third teeth of a cogwheel with in the boundary portion first teeth of a cogwheel one-to-one.

Preferably, the detection device with the liftable subassembly is in be diagonal angle setting in the casing, just detection device is located one side that is close to of casing border portion, elastic component one end is connected the casing be close to border portion's lateral wall, the other end connect with the lateral wall is relative the outer wall of first elevating platform.

Preferably, two side walls of the casing parallel to the movement direction of the rack are provided with oblique guide grooves pointing to the detection device, two side walls of the first lifting platform opposite to the oblique guide grooves are respectively provided with guide rods, and the guide rods are embedded in the oblique guide grooves and move back and forth along the length direction of the oblique guide grooves.

Preferably, be equipped with the first teeth of a cogwheel on the rack, be equipped with on the gear can with the second teeth of a cogwheel of first teeth of a cogwheel meshing, but lifting assembly is including locating second elevating platform in the casing, the top surface of second elevating platform exceeds the root circle face of first teeth of a cogwheel, just the orientation of second elevating platform the face of gear is the inclined plane, elastic component one end is connected the interior bottom surface of casing, one end is connected in addition the bottom surface of second elevating platform.

Preferably, the detection device is a tact switch, and the driven mobile device makes the tact switch send a trigger instruction by touching the tact switch; or the detection device is a sensor which senses the driven moving device and sends a trigger instruction.

Preferably, the number of the protection units is two, and the two protection units are respectively located at two ends of the rack.

The utility model also provides a financial equipment, including the aforesaid drive mechanism with boundary protection function transgresses.

Compared with the prior art, the utility model discloses a protection unit in the transmission mechanism and the financial equipment with border-crossing protect function has effectively prevented to drive the gear drive in-process and has crossed the rack end, has avoided the emergence of results such as driving motor card is dead, reciprocating module structure damages, rack gear damage of beating teeth, has guaranteed security and stability in the rack and pinion transmission process; simultaneously the utility model discloses a drive mechanism simple structure, the control of being convenient for do benefit to industrial production.

Drawings

Fig. 1 is a schematic top view of an exemplary transmission mechanism with an out-of-range protection function according to the present invention;

fig. 2 is a schematic structural diagram of a transmission mechanism with an out-of-range protection function according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a transmission mechanism with an out-of-range protection function according to embodiment 2 of the present invention;

fig. 4 is a schematic structural diagram of a transmission mechanism with an out-of-range protection function according to embodiment 3 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some examples of the present invention, and not all embodiments. 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.

Fig. 1 is a schematic top view of an exemplary transmission mechanism with an out-of-range protection function according to the present invention.

Referring to fig. 1, an exemplary transmission mechanism with an out-of-range protection function according to the present invention includes a rack bar 1 capable of reciprocating, a gear 2 for driving the rack bar 1 to reciprocate, and a protection unit 3 for preventing the gear 2 from crossing the rack bar 1. Wherein, it should be noted that, the utility model discloses do not do specifically and restrict to the quantity that sets up of protection unit 3, for example, protection unit 3 can be according to actual need and set up at rack 1 unilateral. Preferably, two protection units 3 are provided, and the two protection units 3 are respectively located at both ends of the rack 1.

The rack 1 comprises a transmission part 11 and a boundary part 12 connected to the end of the transmission part 11, first gear teeth a are arranged on the rack 1, the first gear teeth a exist on the transmission part 11 and also exist on the boundary part 12, and the first gear teeth a on the transmission part 11 and the boundary part 12 are continuous and uninterrupted.

The gear 2 is provided with a second gear tooth b which can be meshed with the first gear tooth a on the rack 1, the gear 2 rotates, and the second gear tooth b on the gear 2 is meshed with the first gear tooth a on the rack 1, so that the rack 1 is driven to move, and the reciprocating motion of the rack 1 is realized.

The protection unit 3 comprises a moving device 31 and a detection device 32, wherein the moving device 31 is at least partially overlapped with the boundary part 12 of the rack 1 and can reciprocate along with the rack 1, and meanwhile, the moving device 31 can also move relative to the rack 1. The moving device 31 and the boundary part 12 are overlapped, so that the gear 2 is meshed with the boundary part 12 and simultaneously contacts and drives the moving device 31 to move, the detection device 32 sends a trigger command after detecting the moving device 31, the gear 2 changes the motion state according to the trigger command, the change of the motion state prevents the gear 2 from crossing the boundary of the rack 1, and the safety and the stability of transmission are ensured. The change of the motion state of the gear 2 may be that the gear 2 stops rotating, or that the gear 2 stops continuing to rotate in the same direction and changes into reverse rotation, or that the gear 2 decelerates first and then stops, which achieves the purpose of preventing the gear 2 from crossing the boundary of the rack 1.

Note that, since it is necessary to ensure that the gear 2 engages with the boundary portion 12 during normal rotation and drives the moving device 31 overlapping with the boundary portion 12, the overlapping refers to overlapping in the rotational plane of the gear 2, and not to overlapping up and down.

As an embodiment of the detection device 32, the detection device 32 is a tact switch, and the touch-driven mobile device 31 causes the tact switch to issue a trigger command by touching the tact switch. As another embodiment of the detection device 32, the detection device 32 may be a sensor, and the sensor sends a trigger command when sensing the touch-driven moving device 31. It should be understood that the detecting device 32 is not limited to the above, and further, the position of the detecting device 32 may be set according to actual needs as long as the detecting device 32 can detect the driven moving device 31.

Example 1

Based on the above-mentioned transmission mechanism with an out-of-range protection function including the rack 1, the gear 2 and the protection unit 3, the embodiment proposes a specific implementation manner.

Fig. 2 is a schematic structural diagram of the transmission mechanism with an out-of-range protection function according to the embodiment.

Referring to fig. 1 and 2, the transmission mechanism with an out-of-range protection function of the present embodiment includes a rack 1, a gear 2, and a protection unit 3. The protection unit 3 includes a moving device 31 and a detecting device 32.

Specifically, the moving device 31 includes a housing 312, and a lifting assembly 311 and an elastic member 313 located in the housing 312. The housing 312 is fixedly overlapped on the side of the boundary portion 12, so that the housing 312 is fixed relative to the boundary portion 12, and the housing 312 can reciprocate along with the boundary portion 12. The detecting device 32 is fixed at a bottom position of one side of the casing 312 close to the boundary portion 12.

The lifting component 311 is disposed in the housing 312 above the detecting device 32 at an interval, and the detecting device 32 and the lifting component 311 are disposed diagonally in the housing 312. Specifically, the lifting assembly 311 includes a first lifting table 3111 disposed in the housing 312 and a third gear c disposed on a surface of the first lifting table 3111 and capable of engaging with the second gear b of the gear 2. In order to ensure the effective engagement between the second gear teeth b of the gear 2 and the third gear c of the lifting assembly 311 during the rotation of the gear 2, before the gear 2 contacts and drives the lifting assembly 311, part of the third gear teeth c are opposite to the first gear teeth a on the boundary portion 12 one by one, so that the second gear teeth b on the gear 2 are initially engaged with the first gear teeth a and simultaneously engaged with the third gear teeth c without collision. Further, in order to ensure the safety and stability during the engagement process, it is preferable that the top surface of the third gear c is slightly lower than the top surface of the first gear a, or flush with the top surface of the first gear a, so that during the engagement process with the second gear b on the gear 2, collision is avoided, and simultaneous contact is ensured. Certainly, if further for gear 2 rotates in-process second teeth of a cogwheel b on the in-process gear 2 and third teeth of a cogwheel c's contact process, liftable subassembly 311 takes place great relative motion, then can make the root surface of third teeth of a cogwheel c higher than the root surface of first teeth of a cogwheel a, like this, when second teeth of a cogwheel b and first teeth of a cogwheel a and third teeth of a cogwheel c meshing of gear 2, can give liftable subassembly 311 a downward thrust for liftable subassembly 311 can take place relatively great displacement, the more detection of being convenient for. Of course, the above is only a preferred embodiment, and the arrangement of each gear tooth can be set according to specific situations, and is not limited to the above.

The elastic member 313 has one end connected to a side wall of the housing 312 near the boundary portion 12 (the side wall refers to a right side wall of the housing 312 in fig. 2), and has the other end connected to an outer wall of the first elevation stage 3111 opposite to the side wall (the outer wall refers to a right side wall of the first elevation stage 3111 in fig. 2). When the gear 2 does not contact the lifting assembly 311, the elastic member 313 pushes the lifting assembly 311 away from the detecting device 32, so that the end of the lifting assembly 311 away from the boundary portion 12 abuts against the inner wall of the housing 312. Illustratively, the elastic member 313 is a spring. When the gear 2 does not contact the driving liftable component 311, the elastic component 313 is in a compressed state, and the elastic component 311 presses the liftable component 311 to move towards the side far away from the detection device 32, so that one side wall of the liftable component 311 far away from the boundary portion 12 abuts against the inner wall of the housing 312 far away from the boundary portion 12. This mode is on the one hand when gear 2 does not contact drive liftable subassembly 311, can carry out certain fixed to liftable subassembly 311, on the other hand, in the in-process of gear 2 contact drive liftable subassembly 311, produce certain resistance to the removal of liftable subassembly 311, thereby further can produce certain resistance to the drive of the gear 2 of drive liftable subassembly 311, along with the continuous drive of gear 2, the elasticity of elastic component 313 is stronger more, then the resistance is bigger, big resistance is bigger to the thrust reversal of gear 2, do benefit to more and prevent that gear 2 from crossing the border of rack 1, the protection effect is greatly improved.

Further, in order to ensure the stability of the lifting assembly 311 during the moving process, two side walls of the housing 312 parallel to the moving direction of the rack 1 are provided with an inclined guide groove 3121 pointing to the detection device 32, two side walls of the first lifting table 3111 opposite to the inclined guide groove 3121 are respectively provided with a guide rod 3112, and the guide rod 3112 is embedded in the inclined guide groove 3121 and reciprocates along the length direction of the inclined guide groove 3121. As an embodiment, for convenience in the manufacturing process, the inclined guide grooves 3121 are two inclined through holes formed on two opposite sidewalls of the housing 312, and two opposite guide rods 3112 on the first lifting table 3111 of the lifting assembly 311 are respectively embedded in the corresponding through holes, so that the lifting assembly 311 is slidably connected to the housing 312, and the lifting assembly 311 is close to or far from the detection device 32 along the inclined through holes.

The working process of the transmission mechanism with the boundary crossing protection function based on the embodiment is as follows: the gear 2 is in meshing transmission with the transmission part 11 of the rack 1, the shell 312 is fixed relative to the rack 1 and moves along with the rack 1, when the rack 1 moves to enable the boundary part 12 of the rack 1 to be meshed with the gear 2, the gear 2 is simultaneously in contact meshing engagement with the third gear c on the lifting assembly 311, the lifting assembly 311 is driven to move towards the detection device 32 along the inclined guide groove 3121, when the detection device 32 detects the lifting assembly 311, the detection device 32 sends a trigger instruction, the gear 2 changes the motion state according to the trigger instruction, and therefore the gear 2 is prevented from crossing the boundary of the rack 1. When the gear 2 is driven to be disengaged from the third gear c, the elastic member 313 pushes the lifting assembly 311 to move the lifting assembly 311 along the inclined guide groove 3121 toward a side away from the detecting device 32, and the lifting assembly 311 returns to the initial position abutting against the housing 312.

Example 2

Based on the above-mentioned transmission mechanism with an out-of-range protection function including the rack 1, the gear 2 and the protection unit 3, the present embodiment proposes another specific embodiment.

Fig. 3 is a schematic structural diagram of the transmission mechanism with an out-of-range protection function according to the embodiment.

Referring to fig. 1 and 3, the transmission mechanism with an out-of-range protection function of the present embodiment includes a rack 1, a gear 2, and a protection unit 3. The protection unit 3 includes a moving device 31 and a detecting device 32.

Specifically, the moving device 31 includes a housing 312, and a lifting assembly 311 and an elastic member 313 located in the housing 312. The housing 312 is fixedly overlapped on the side of the boundary portion 12, the housing 312 is fixed relative to the boundary portion 12, and the housing 312 can reciprocate along with the boundary portion 12. The detection device 32 is fixedly disposed at a bottom position within the housing 312, preferably near a middle position of the housing 312.

The lifting component 311 is disposed in the housing 312 above the detecting device 32 at an interval, and the detecting device 32 and the lifting component 311 are disposed in the housing 312 in a vertically opposite manner. Specifically, the lifting assembly 311 includes a first lifting table 3111 disposed in the housing 312 and a third gear c disposed on a surface of the first lifting table 3111 and engaged with the second gear b. In order to ensure effective engagement with the third gear c of the lifting assembly 311 during rotation of the gear 2, before the gear 2 contacts and drives the lifting assembly 311, part of the third gear c is opposite to the first gear a on the boundary portion 12 one by one, so that the second gear b on the gear 2 is initially engaged with the first gear a and is engaged with the third gear c at the same time, and collision cannot occur. Further, in order to ensure the safety and stability during the engagement process, it is preferable that the top surface of the third gear c is slightly lower than the top surface of the first gear a, or flush with the top surface of the first gear a, so that during the engagement process with the second gear b on the gear 2, collision is avoided, and simultaneous contact is ensured. Certainly, if further in order to gear 2 rotates in-process second teeth of a cogwheel b on the gear 2 and the contact process of third teeth of a cogwheel c, liftable subassembly 311 takes place great relative motion, then can make the root surface of third teeth of a cogwheel c higher than the root surface of first teeth of a cogwheel a, like this, second teeth of a cogwheel b and first teeth of a cogwheel a and the meshing of third teeth of a cogwheel c of gear 2 can give liftable subassembly 311 a downward thrust for liftable subassembly 311 can take place relatively great displacement, the more detection of being convenient for. Of course, the above is only a preferred embodiment, and the arrangement of the gear teeth can be set according to specific situations, and is not limited to the above.

The elastic member 313 has one end connected to the bottom wall of the housing 312 and the other end connected to the bottom wall of the first elevation table 3111 opposite to the bottom wall of the housing 312. When the gear 2 does not contact the driving lifting assembly 311, the elastic member 313 pushes the lifting assembly 311 away from the detecting device 32. Illustratively, the elastic member 313 is a spring. In the initial state, i.e. when the gear 2 does not contact the driving liftable assembly 311, the spring of the present embodiment is in a natural extension state.

The working process of the transmission mechanism with the boundary crossing protection function based on the embodiment is as follows: the gear 2 is engaged with the transmission part 11 of the rack 1 for transmission, the shell 312 is fixed relative to the rack 1 and moves along with the rack 1, when the rack 1 moves to enable the boundary part 12 to be engaged with the gear 2, the gear 2 is simultaneously contacted and engaged with the third gear tooth c on the lifting component 311 to drive the lifting component 311 to move towards the detection device 32 at the bottom, when the detection device 32 detects the lifting component 311, the detection device 32 sends a trigger instruction, the gear 2 changes the motion state according to the trigger instruction, and therefore the gear 2 is prevented from crossing the boundary of the rack 1. When the gear 2 is driven to be disengaged from the third gear c, the elastic member 313 pushes the lifting assembly 311 to move the lifting assembly 311 toward a side away from the detecting device 32, so that the lifting assembly 311 returns to the initial position.

Example 3

Fig. 4 is a schematic structural diagram of the transmission mechanism with an out-of-range protection function according to the embodiment.

Referring to fig. 1 and 4, the transmission mechanism with an out-of-range protection function of the present embodiment includes a rack 1, a gear 2, and a protection unit 3. The protection unit 3 includes a moving device 31 and a detecting device 32.

The lifting component 311 is disposed in the housing 312 above the detecting device 32 at an interval, and the detecting device 32 and the lifting component 311 are disposed in the housing 312 in a vertically opposite manner. Specifically, the liftable component 311 includes a second lifting table 3114 disposed in the housing 312, and a top surface of the second lifting table 3114 is higher than a root circle surface of the first gear tooth a, as shown in fig. 4, a height h1 is higher than a height h2, and this arrangement ensures that the gear 2 can contact with a surface of the second lifting table 3114 and generate a downward thrust on the second lifting table 3114 during the engagement process with the first gear tooth a on the rack 1, so as to drive the second lifting table 3114 to move down. Meanwhile, in order to ensure that the gear 2 does not collide with the second elevation table 3114 in initial contact, the gear 2 is favorably rotated into the surface of the second elevation table 3114, and the surface of the second elevation table 3114 facing the gear 2 is an inclined surface m.

The elastic member 313 has one end connected to the bottom wall of the housing 312 and the other end connected to the bottom wall of the second elevation table 3114 opposite to the bottom wall of the housing 312. When the gear 2 does not contact the driving lifting assembly 311, the elastic member 313 pushes the lifting assembly 311 away from the detecting device 32. Illustratively, the elastic member 313 is a spring. In the initial state, i.e. when the gear 2 does not contact the driving liftable assembly 311, the spring of the present embodiment is in a natural extension state.

The working process of the transmission mechanism with the boundary crossing protection function based on the embodiment is as follows: the gear 2 is engaged with the transmission part 11 of the rack 1 for transmission, the housing 312 is fixed relative to the rack 1 and moves along with the rack 1, when the rack 1 moves to enable the boundary part 12 to be engaged with the gear 2, the gear 2 is simultaneously contacted with the inclined surface m of the second lifting table 3114 and is switched to be contacted with the top surface of the second lifting table 3114 through the inclined surface m, because the top surface of the second lifting table 3114 is higher than the top surface of the circular surface of the tooth root of the first gear tooth a on the rack 1, the gear 2 extrudes and drives the lifting component 311 to move towards the detection device 32 at the bottom, when the detection device 32 detects the lifting component 311, the detection device 32 sends a trigger instruction, the gear 2 changes the motion state according to the trigger instruction, and therefore the gear 2 is prevented from crossing the boundary of the rack 1. When the gear 2 is driven to be out of contact with the second lifting table 3114, the elastic member 313 pushes the lifting assembly 311 to move the lifting assembly 311 toward a side away from the detecting device 32, so that the lifting assembly 311 returns to the initial position.

Based on foretell drive mechanism with protect function transboundary, the utility model discloses still provide one kind including the aforesaid drive mechanism's with protect function transboundary financial equipment.

The utility model discloses a protection unit in the drive mechanism and financial equipment with border-crossing protection function has effectively prevented to drive the gear drive in-process and has crossed the rack end, has avoided the emergence of results such as driving motor card is dead, reciprocating module structure damage, rack gear damage of beating teeth, has guaranteed security and stability in the rack and pinion transmission process; simultaneously the utility model discloses a drive mechanism simple structure, the control of being convenient for do benefit to industrial production.

While the invention has been shown and described with reference to certain embodiments, it will be understood by those skilled in the art that: various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. A transmission mechanism with an out-of-range protection function is characterized by comprising a rack (1) capable of reciprocating, a gear (2) for driving the rack (1) to reciprocate and a protection unit (3) for preventing the gear (2) from passing over the rack (1); wherein the rack (1) comprises a transmission part (11) and a boundary part (12) connected with the end part of the transmission part (11); the protection unit (3) comprises a moving device (31) and a detection device (32), wherein the moving device (31) is at least partially overlapped with the boundary part (12) of the rack (1) and reciprocates along with the rack (1); the gear (2) is meshed with the boundary part (12) and simultaneously contacts with and drives the moving device (31) to move, and the detection device (32) is used for detecting the moving device (31) moving after contacting with the gear (2) so as to send out a trigger instruction for changing the motion state of the gear (2).

2. The transmission mechanism with the function of over-boundary protection according to claim 1, wherein the moving device (31) comprises a lifting component (311), the lifting component (311) is arranged on the side of the boundary portion (12) in an overlapping manner, and the detecting device (32) is arranged at the bottom of the lifting component (311) at intervals and is fixed relative to the boundary portion (12); the lifting component (311) can reciprocate along with the boundary part (12) and can move towards the detection device (32) relative to the boundary part (12) under the driving of the gear (2); and the detection device (32) sends out a trigger instruction when detecting the lifting component (311).

3. The transmission mechanism with the function of over-boundary protection according to claim 2, wherein the moving device (31) further comprises a housing (312) fixed at the side of the boundary portion (12) in an overlapping manner and an elastic member (313) arranged in the housing (312); the detection device (32) is fixedly arranged at the bottom position in the shell (312); the lifting assembly (311) is arranged in the shell (312) above the detection device (32) at intervals and can move towards the detection device (32) under the contact drive of the gear (2) relative to the shell (312); elastic component (313) one end is connected liftable subassembly (311), and the other end is connected casing (312), elastic component (313) are used for promoting liftable subassembly (311) keep away from detection device (32).

4. The transmission mechanism with the function of over-range protection according to claim 3, wherein a first gear (a) is arranged on the rack (1), a second gear (b) capable of being meshed with the first gear (a) is arranged on the gear (2), the lifting component (311) comprises a first lifting table (3111) arranged in the housing (312) and a third gear (c) arranged on the surface of the first lifting table (3111) and capable of being meshed with the second gear (b), and the gear (2) is in contact with and drives the lifting component (311) and is in front of the first gear (a) on the boundary portion (12), and the third gear (c) is in one-to-one correspondence with the first gear (a) on the boundary portion (12).

5. The transmission mechanism with an out-of-range protection function according to claim 4, wherein the detection device (32) and the liftable component (311) are diagonally arranged in the housing (312), the detection device (32) is located on one side of the housing (312) close to the boundary portion (12), one end of the elastic member (313) is connected to a side wall of the housing (312) close to the boundary portion (12), and the other end of the elastic member is connected to an outer wall of the first liftable platform (3111) opposite to the side wall.

6. The transmission mechanism with an out-of-range protection function according to claim 5, wherein two side walls of the housing (312) parallel to the movement direction of the rack (1) are provided with an inclined guide groove (3121) pointing to the detection device (32), two side walls of the first lifting table (3111) opposite to the inclined guide groove (3121) are respectively provided with a guide rod (3112), and the guide rod (3112) is embedded in the inclined guide groove (3121) and reciprocates along the length direction of the inclined guide groove (3121).

7. The transmission mechanism with the border crossing protection function according to claim 3, wherein a first gear (a) is arranged on the rack (1), a second gear (b) capable of being meshed with the first gear (a) is arranged on the gear (2), the lifting component (311) comprises a second lifting table (3114) arranged in the housing (312), the top surface of the second lifting table (3114) is higher than the tooth root circular surface of the first gear (a), the surface of the second lifting table (3114) facing the gear (2) is an inclined surface, one end of the elastic member (313) is connected with the inner bottom surface of the housing (312), and the other end of the elastic member is connected with the bottom surface of the second lifting table (3114).

8. The transmission mechanism with the boundary crossing protection function according to any one of claims 1 to 7, wherein the detection device (32) is a tact switch, and the driven moving device (31) makes the tact switch send a trigger command by touching the tact switch; or the detection device (32) is a sensor which sends out a trigger instruction when sensing the driven moving device (31).

9. The transmission mechanism with the boundary crossing protection function according to any one of claims 1 to 7, wherein two protection units (3) are provided, and the two protection units (3) are respectively positioned at two ends of the rack (1).

10. A financial device including a transmission mechanism having an out-of-range protection function as claimed in any one of claims 1 to 9.