阅读说明：本技术 一种用于企业管理文件收纳盒自动定位装置 (Be used for enterprise management file receiver automatic positioning device ) 是由 黄晨露 于 2021-07-06 设计创作，主要内容包括：本发明涉及企业管理技术领域,且公开了一种用于企业管理文件收纳盒自动定位装置,包括外壳,所述外壳中部内壁活动连接有夹持杆,夹持杆中部内壁活动连接有动力机构,外壳中部内壁活动连接有定位机构,夹持杆中部内壁活动连接有触发机构,夹持杆中部内壁活动连接有复位机构。该用于企业管理文件收纳盒自动定位装置,通过压块带动电介质板运动,电介质板带动负极板和正极板运行,再通过压敏电阻与复位弹簧一的配合使用,从而达到自动夹持推送的效果,当文件盒完全插入的时候,此时压块运动到最大位置,此时负极板和正极板的相对面积达到最小,正极板末端的电压最小,从而触发电磁体的工作电压,使夹持杆向上运动,实现了自动推送。(The invention relates to the technical field of enterprise management and discloses an automatic positioning device for an enterprise management file storage box. This a be used for enterprise management file receiver automatic positioning device, drive the motion of dielectric medium board through the briquetting, the dielectric medium board drives negative plate and positive plate operation, rethread piezoresistor uses with reset spring one's cooperation, thereby reach the effect of automatic centre gripping propelling movement, when the file box inserts completely, the briquetting moved maximum position this moment, the relative area of negative plate and positive plate reaches the minimum this moment, the terminal voltage of positive plate is minimum, thereby trigger the operating voltage of electromagnet, make the supporting rod upward movement, automatic propelling movement has been realized.)

1. The utility model provides a be used for enterprise management file receiver automatic positioning device, includes shell (1), its characterized in that: the clamping device is characterized in that the inner wall of the middle of the shell (1) is movably connected with a clamping rod (2), the inner wall of the middle of the clamping rod (2) is movably connected with a power mechanism (3), the inner wall of the middle of the shell (1) is movably connected with a positioning mechanism (4), the inner wall of the middle of the clamping rod (2) is movably connected with a triggering mechanism (5), and the inner wall of the middle of the clamping rod (2) is movably connected with a resetting mechanism (6).

2. The automatic positioning device for the enterprise management file storage box according to claim 1, characterized in that: the power mechanism (3) comprises a magnetic push rod (34), a positioning spring (33) is fixedly connected to the inner side of the magnetic push rod (34), a return spring column (31) is movably connected to the inner wall of the middle of the shell (1), and an electromagnet (32) is fixedly connected to the inner wall of the middle of the shell (1).

3. The automatic positioning device for the enterprise management file storage box according to claim 1, characterized in that: positioning mechanism (4) are including compression post (41), and compression post (41) outside fixedly connected with leads electrical pillar (42), and shell (1) middle part inner wall swing joint has electrorheological fluids (43), and movable groove (44) have been seted up at shell (1) middle part, and shell (1) middle part inner wall swing joint has fixture block (45).

4. The automatic positioning device for the enterprise management file storage box according to claim 1, characterized in that: trigger mechanism (5) are including electrically conductive stopper (51), electrically conductive stopper (51) middle part inner wall fixedly connected with piezo-resistor (52), electrically conductive stopper (51) middle part inner wall fixedly connected with negative plate (53), electrically conductive stopper (51) middle part inner wall swing joint has briquetting (56), briquetting (56) middle part inner wall fixedly connected with dielectric plate (55), briquetting (56) left side fixedly connected with reset spring (54), supporting rod (2) middle part inner wall fixedly connected with positive plate (57).

5. The automatic positioning device for the enterprise management file storage box according to claim 1, characterized in that: the reset mechanism (6) comprises a reset rod (64), a magnetic block (63) is fixedly connected to the inner wall of the middle of the reset rod (64), a stationary contact (65) is fixedly connected to the outer side of the reset rod (64), a reset spring II (61) is fixedly connected to the top of the reset rod (64), and a coil (62) is fixedly connected to the inner wall of the middle of the clamping rod (2).

6. The automatic positioning device for the enterprise management file storage box according to claim 2, characterized in that: the size of the electromagnet (32) is smaller than that of the magnetic push rod (34), the magnetism of the top of the electromagnet (32) is opposite to that of the inner side of the magnetic push rod (34), and the top of the positioning spring (33) is fixedly connected with the inner wall of the shell (1).

7. The automatic positioning device for file storage boxes for enterprise management according to claim 3, characterized in that: the size of the compression column (41) is smaller than that of the movable groove (44), and the compression column (41) has conductivity.

8. The automatic positioning device for file storage boxes for enterprise management according to claim 4, wherein: the negative plate (53) and the positive plate (57) are the same in size, the negative plate (53) is smaller than the dielectric plate (55), and the negative plate (53) is electrically connected with the piezoresistor (52).

9. The automatic positioning device for file storage boxes for enterprise management according to claim 5, wherein: the static contact (65) is normally in a closed state, power supply of equipment is controlled, and the magnetism on the top of the magnetic block (63) is an S pole.

Technical Field

The invention relates to the technical field of enterprise management, in particular to an automatic positioning device for an enterprise management file storage box.

Background

Enterprise management is a general term for planning, organizing, commanding, coordinating and controlling a series of activities of enterprise production and management, and is an objective requirement for social mass production, an enterprise is a large group which is different from individuals, a large number of files are needed in the enterprise, the files are various, although many files are replaced by an electronic network at present, paper files cannot be completely replaced, and therefore a file box is needed to arrange important files.

The existing file storage box collects files through a folder and then stacks the files, when the file box cannot be fully arranged on a swing frame, the side edge of the file box does not depend on unstable gravity center and is prone to toppling, so that the files of the file box collapse and fall easily, the files fall easily and break away from the file box, confusion is caused to the collected files, and inconvenience is caused to subsequent arrangement.

Therefore, we propose an automatic positioning device for an enterprise management file storage box to solve the above problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an automatic positioning device for an enterprise management file storage box, which has the advantages of automatic pushing, clamping and positioning, and prevention of file scattering and mixing caused by collapse of a file box, and solves the problem that the traditional file storage box is not fixedly positioned and is easy to topple.

(II) technical scheme

In order to realize the automatic pushing, clamping and positioning and prevent the files from scattering and mixing due to the collapse of the file box, the invention provides the following technical scheme: the utility model provides a be used for management file receiver automatic positioning device of enterprise, includes the shell, shell middle part inner wall swing joint has the supporting rod, and supporting rod middle part inner wall swing joint has power unit, and shell middle part inner wall swing joint has positioning mechanism, and supporting rod middle part inner wall swing joint has trigger mechanism, and supporting rod middle part inner wall swing joint has canceling release mechanical system.

Furthermore, the power mechanism comprises a magnetic push rod, a positioning spring is fixedly connected to the inner side of the magnetic push rod, a return spring column is movably connected to the inner wall of the middle of the shell, an electromagnet is fixedly connected to the inner wall of the middle of the shell, and after the electromagnet is electrified, a magnetic field is generated to enable the magnetic push rod to move upwards under the action of repulsive force, so that the clamping rod is pushed.

Further, positioning mechanism includes the compression post, and compression post outside fixedly connected with leads electrical pillar, and shell middle part inner wall swing joint has the electrorheological fluids, and the activity groove has been seted up at the shell middle part, and shell middle part inner wall swing joint has the fixture block, thereby receives the extrusion under the effect of electrically conductive stopper when the compression post and realizes the extrusion to the electrorheological fluids, drives the fixture block and carries out the joint with electrically conductive stopper, and the electrorheological fluids circular telegram back is solid-state by liquid transition to the realization increases the effect of steadiness.

Further, trigger mechanism includes electrically conductive stopper, electrically conductive stopper middle part inner wall fixedly connected with piezo-resistor, electrically conductive stopper middle part inner wall fixedly connected with negative plate, electrically conductive stopper middle part inner wall swing joint has the briquetting, and briquetting middle part inner wall fixedly connected with dielectric plate, briquetting left side fixedly connected with reset spring one, supporting rod middle part inner wall fixedly connected with positive plate, the briquetting receives the extrusion and drives dielectric plate motion, changes the terminal voltage size of negative plate to trigger piezo-resistor's operating voltage.

Further, canceling release mechanical system includes the release link, release link middle part inner wall fixedly connected with magnetic path, release link outside fixedly connected with stationary contact, release link top fixedly connected with reset spring two, supporting rod middle part inner wall fixedly connected with coil, magnetic path and coil mainly play the contact time who delays stationary contact.

Furthermore, the size of the electromagnet is smaller than that of the magnetic push rod, the magnetism of the top of the electromagnet is opposite to that of the inner side of the magnetic push rod, the top of the positioning spring is fixedly connected with the inner wall of the shell, the positioning spring mainly plays a role in resetting the magnetic push rod, and when the repulsive force borne by the magnetic push rod disappears, the positioning spring resets the magnetic push rod to the initial position.

Furthermore, the size of the compression column is smaller than that of the movable groove, the compression column has conductivity, and when the conductive limiting block is plugged with the movable groove, the compression column forms a passage so as to realize the conductive column passage.

Further, the negative plate is the same with the positive plate size, and the negative plate size is less than the dielectric plate size, negative plate and piezo-resistor electric connection, and when the position skew took place for the dielectric plate, the relative area of negative plate and positive plate changed this moment to the realization changes the terminal voltage size of negative plate, and when negative plate and positive plate were sheltered from completely, the terminal voltage of negative plate was minimum this moment, thereby reached piezo-resistor's minimum access voltage.

Furthermore, the stationary contact is normally in a closed state, power is supplied to the control equipment, the magnetism at the top of the magnetic block is an S pole, the magnetic block moves under the driving of the reset rod, and when the magnetic block moves downwards, the magnetic block tends to move upwards under the action of the coil, so that the reset time of the reset rod is prolonged.

(III) advantageous effects

Compared with the prior art, the invention provides an automatic positioning device for an enterprise management file storage box, which has the following beneficial effects:

1. this a be used for enterprise management file receiver automatic positioning device, drive the motion of dielectric medium board through the briquetting, the dielectric medium board drives negative plate and positive plate operation, rethread piezoresistor uses with reset spring one's cooperation, thereby reach the effect of automatic centre gripping propelling movement, when the file box inserts completely, the briquetting moved maximum position this moment, the relative area of negative plate and positive plate reaches the minimum this moment, the terminal voltage of positive plate is minimum, thereby trigger the operating voltage of electromagnet, make the supporting rod upward movement, automatic propelling movement has been realized.

2. This a be used for enterprise management file receiver automatic positioning device, drive the motion of compression post through electrically conductive stopper, the motion of compression post drive electrorheological fluids, rethread fixture block is used with the cooperation of leading electrical pillar, thereby reach the effect of location, when the fixture block contacts with electrically conductive stopper, because electrically conductive stopper has electric conductivity, it switches on to lead electrical pillar this moment, electrorheological fluids is solid-state by liquid change into, thereby carry on spacingly to the fixture block, the file box is by the centre gripping under the effect of supporting rod this moment, thereby the fixed position of having guaranteed the file box prevents that the file from taking place to collapse in disorder.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partially enlarged view of the portion A of FIG. 1 according to the present invention;

FIG. 3 is a partially enlarged view of the portion B shown in FIG. 1 according to the present invention;

FIG. 4 is a schematic view of a partially enlarged structure of the portion C in FIG. 1 according to the present invention.

In the figure: 1. a housing; 2. a clamping rod; 3. a power mechanism; 4. a positioning mechanism; 5. a trigger mechanism; 6. a reset mechanism; 31. a return spring post; 32. an electromagnet; 33. a positioning spring; 34. a magnetic push rod; 41. compressing the column; 42. a conductive post; 43. electrorheological fluid; 44. a movable groove; 45. a clamping block; 51. a conductive limiting block; 52. a voltage dependent resistor; 53. a negative plate; 54. a first return spring; 55. a dielectric plate; 56. briquetting; 57. a positive plate; 61. a second return spring; 62. a coil; 63. a magnetic block; 64. a reset lever; 65. and a stationary contact.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

please refer to fig. 1, an automatic positioning device for an enterprise management file storage box comprises a shell 1, wherein the inner wall of the middle part of the shell 1 is movably connected with a clamping rod 2, the inner wall of the middle part of the clamping rod 2 is movably connected with a power mechanism 3, the inner wall of the middle part of the shell 1 is movably connected with a positioning mechanism 4, the inner wall of the middle part of the clamping rod 2 is movably connected with a trigger mechanism 5, and the inner wall of the middle part of the clamping rod 2 is movably connected with a reset mechanism 6.

Further, the power mechanism 3 comprises a magnetic push rod 34, a positioning spring 33 is fixedly connected to the inner side of the magnetic push rod 34, a return spring column 31 is movably connected to the inner wall of the middle part of the shell 1, an electromagnet 32 is fixedly connected to the inner wall of the middle part of the shell 1, the size of the electromagnet 32 is smaller than that of the magnetic push rod 34, and the magnetism of the top of the electromagnet 32 is opposite to that of the inner side of the magnetic push rod 34;

the top of the positioning spring 33 is fixedly connected with the inner wall of the shell 1, the positioning spring 33 mainly plays a role of resetting the magnetic push rod 34, when the repulsive force borne by the magnetic push rod 34 disappears, the positioning spring 33 resets the magnetic push rod 34 to the initial position, and the electromagnet 32 is electrified to generate a magnetic field to enable the magnetic push rod 34 to move upwards under the action of the repulsive force, so that the clamping rod 2 is pushed.

Example two:

referring to fig. 1 and 2, an automatic positioning device for an enterprise management file storage box comprises a shell 1, wherein the inner wall of the middle of the shell 1 is movably connected with a clamping rod 2, the inner wall of the middle of the clamping rod 2 is movably connected with a power mechanism 3, the inner wall of the middle of the shell 1 is movably connected with a positioning mechanism 4, the inner wall of the middle of the clamping rod 2 is movably connected with a trigger mechanism 5, and the inner wall of the middle of the clamping rod 2 is movably connected with a reset mechanism 6.

Further, the positioning mechanism 4 includes a compression column 41, the size of the compression column 41 is smaller than that of the movable groove 44, the compression column 41 has electrical conductivity, when the conductive limiting block 51 is inserted into the movable groove 44, the compression column 41 forms a passage to realize the passage of the conductive column 42, the conductive column 42 is fixedly connected to the outer side of the compression column 41, and the inner wall of the middle part of the housing 1 is movably connected with the electro-rheological fluid 43;

the activity groove 44 has been seted up at 1 middle part of shell, and 1 middle part inner wall swing joint of shell has fixture block 45, thereby receives the extrusion realization to electrorheological fluids 43 extrusion when compression post 41 under the effect of electrically conductive stopper 51, drives fixture block 45 and electrically conductive stopper 51 and carries out the joint, and electrorheological fluids 43 switches on the back by liquid change solid-state into to the effect of realization increase steadiness.

Example three:

referring to fig. 1 and 3, an automatic positioning device for an enterprise management file storage box comprises a shell 1, wherein the inner wall of the middle of the shell 1 is movably connected with a clamping rod 2, the inner wall of the middle of the clamping rod 2 is movably connected with a power mechanism 3, the inner wall of the middle of the shell 1 is movably connected with a positioning mechanism 4, the inner wall of the middle of the clamping rod 2 is movably connected with a trigger mechanism 5, and the inner wall of the middle of the clamping rod 2 is movably connected with a reset mechanism 6.

Further, the trigger mechanism 5 comprises a conductive limiting block 51, a piezoresistor 52 is fixedly connected to the inner wall of the middle part of the conductive limiting block 51, a negative plate 53 is fixedly connected to the inner wall of the middle part of the conductive limiting block 51, the negative plate 53 and the positive plate 57 have the same size, the size of the negative plate 53 is smaller than that of the dielectric plate 55, and the negative plate 53 is electrically connected with the piezoresistor 52;

when dielectric plate 55 takes place the offset, the relative area of negative plate 53 and positive plate 57 changes this moment, thereby realize changing the terminal voltage size of negative plate 53, when negative plate 53 and positive plate 57 are sheltered from completely, the terminal voltage of negative plate 53 is minimum this moment, thereby reach piezo-resistor 52's minimum access voltage, electrically conductive stopper 51 middle part inner wall swing joint has briquetting 56, briquetting 56 middle part inner wall fixedly connected with dielectric plate 55, briquetting 56 left side fixedly connected with reset spring 54, 2 middle part inner wall fixedly connected with positive plate 57 of holding rod, briquetting 56 receives the extrusion and drives the motion of piezo-resistor 55, change the terminal voltage size of negative plate 53, thereby trigger piezo-resistor 52's operating voltage.

Example four:

referring to fig. 1 and 4, an automatic positioning device for an enterprise management file storage box comprises a shell 1, wherein the inner wall of the middle of the shell 1 is movably connected with a clamping rod 2, the inner wall of the middle of the clamping rod 2 is movably connected with a power mechanism 3, the inner wall of the middle of the shell 1 is movably connected with a positioning mechanism 4, the inner wall of the middle of the clamping rod 2 is movably connected with a trigger mechanism 5, and the inner wall of the middle of the clamping rod 2 is movably connected with a reset mechanism 6.

Further, the reset mechanism 6 comprises a reset rod 64, a magnetic block 63 is fixedly connected to the inner wall of the middle of the reset rod 64, a static contact 65 is fixedly connected to the outer side of the reset rod 64, the static contact 65 is normally in a closed state, power supply of the control device is achieved, and the magnetism of the top of the magnetic block 63 is S; ,

the magnetic block 63 moves under the driving of the reset rod 64, when the magnetic block 63 moves downwards, the magnetic block 63 tends to move upwards under the action of the coil 62, so that the reset time of the reset rod 64 is prolonged, the second reset spring 61 is fixedly connected to the top of the reset rod 64, the coil 62 is fixedly connected to the inner wall of the middle of the clamping rod 2, and the magnetic block 63 and the coil 62 mainly play a role in delaying the contact time of the static contact 65.

Example five:

referring to fig. 1-4, an automatic positioning device for an enterprise management file storage box comprises a shell 1, wherein the inner wall of the middle of the shell 1 is movably connected with a clamping rod 2, the inner wall of the middle of the clamping rod 2 is movably connected with a power mechanism 3, the inner wall of the middle of the shell 1 is movably connected with a positioning mechanism 4, the inner wall of the middle of the clamping rod 2 is movably connected with a trigger mechanism 5, and the inner wall of the middle of the clamping rod 2 is movably connected with a reset mechanism 6.

Further, the power mechanism 3 comprises a magnetic push rod 34, a positioning spring 33 is fixedly connected to the inner side of the magnetic push rod 34, a return spring column 31 is movably connected to the inner wall of the middle part of the shell 1, an electromagnet 32 is fixedly connected to the inner wall of the middle part of the shell 1, the size of the electromagnet 32 is smaller than that of the magnetic push rod 34, and the magnetism of the top of the electromagnet 32 is opposite to that of the inner side of the magnetic push rod 34;

the top of the positioning spring 33 is fixedly connected with the inner wall of the shell 1, the positioning spring 33 mainly plays a role of resetting the magnetic push rod 34, when the repulsive force borne by the magnetic push rod 34 disappears, the positioning spring 33 resets the magnetic push rod 34 to the initial position, and the electromagnet 32 is electrified to generate a magnetic field to enable the magnetic push rod 34 to move upwards under the action of the repulsive force, so that the clamping rod 2 is pushed.

Further, the positioning mechanism 4 includes a compression column 41, the size of the compression column 41 is smaller than that of the movable groove 44, the compression column 41 has electrical conductivity, when the conductive limiting block 51 is inserted into the movable groove 44, the compression column 41 forms a passage to realize the passage of the conductive column 42, the conductive column 42 is fixedly connected to the outer side of the compression column 41, and the inner wall of the middle part of the housing 1 is movably connected with the electro-rheological fluid 43;

the activity groove 44 has been seted up at 1 middle part of shell, and 1 middle part inner wall swing joint of shell has fixture block 45, thereby receives the extrusion realization to electrorheological fluids 43 extrusion when compression post 41 under the effect of electrically conductive stopper 51, drives fixture block 45 and electrically conductive stopper 51 and carries out the joint, and electrorheological fluids 43 switches on the back by liquid change solid-state into to the effect of realization increase steadiness.

Further, the trigger mechanism 5 comprises a conductive limiting block 51, a piezoresistor 52 is fixedly connected to the inner wall of the middle part of the conductive limiting block 51, a negative plate 53 is fixedly connected to the inner wall of the middle part of the conductive limiting block 51, the size of the negative plate 53 is the same as that of the positive plate 57, the size of the negative plate 53 is smaller than that of the dielectric plate 55, the negative plate 53 is electrically connected with the piezoresistor 52, and when the dielectric plate 55 is displaced, the relative area of the negative plate 53 and the positive plate 57 is changed, so that the voltage at the tail end of the negative plate 53 is changed;

when negative plate 53 and positive plate 57 are sheltered from completely, the terminal voltage of negative plate 53 is minimum this moment to reach piezo-resistor 52's minimum access voltage, electrically conductive stopper 51 middle part inner wall swing joint has briquetting 56, briquetting 56 middle part inner wall fixedly connected with dielectric plate 55, briquetting 56 left side fixedly connected with reset spring 54, 2 middle part inner wall fixedly connected with positive plate 57 of supporting rod, briquetting 56 receives the extrusion and drives the movement of dielectric plate 55, change the terminal voltage size of negative plate 53, thereby trigger piezo-resistor 52's operating voltage.

Further, the reset mechanism 6 includes a reset rod 64, a magnetic block 63 is fixedly connected to the middle inner wall of the reset rod 64, a stationary contact 65 is fixedly connected to the outer side of the reset rod 64, the stationary contact 65 is normally in a passage state, power supply of the control device is realized, the magnetism at the top of the magnetic block 63 is an S pole, the magnetic block 63 moves under the driving of the reset rod 64, when the magnetic block 63 moves downwards, the magnetic block 63 is influenced by a coil 62 to move upwards, the reset time of the reset rod 64 is prolonged, a second reset spring 61 is fixedly connected to the top of the reset rod 64, a coil 62 is fixedly connected to the middle inner wall of the clamping rod 2, and the magnetic block 63 and the coil 62 mainly play a role in delaying the contact time of the stationary contact 65.

The working principle is as follows: when the file box is placed, a file is flatly placed and inserted into the middle of the shell 1, the pressing block 56 moves outwards under extrusion, the first reset spring 54 is compressed along with the movement of the pressing block 56, the dielectric plate 55 moves along with the pressing block 56, the relative areas of the negative plate 53 and the positive plate 57 are gradually reduced, when the file box is completely inserted, the pressing block 56 moves to the maximum position, the relative areas of the negative plate 53 and the positive plate 57 reach the minimum, the voltage at the tail end of the positive plate 57 reaches the minimum access voltage of the piezoresistor 52, so that the electromagnet 32 is in an access state, the electromagnet 32 is electrified to generate a magnetic field, the magnetic push rod 34 is subjected to the action of the magnetic field to generate a repulsive force, the magnetic push rod moves upwards to extrude the clamping rod 2, and the clamping rod 2 extrudes the file box upwards;

along with the upward movement of the clamping rod 2, the conductive limiting block 51 is inserted in the movable groove 44, when the conductive limiting block 51 moves to the maximum position, the compression column 41 is extruded at the moment, so that the electro-rheological fluid 43 is subjected to a hydraulic action to drive the clamping block 45 to move inwards, when the clamping block 45 is contacted with the conductive limiting block 51, as the conductive limiting block 51 has conductivity, the conductive column 42 is electrified at the moment, the electro-rheological fluid 43 is changed from a liquid state to a solid state, so that the clamping block 45 is limited, and therefore the clamping rod 2 is ensured not to rebound downwards under the action of the reset spring column 31, and the effect of positioning the file box is achieved;

when the fixed file box needs to be taken out, the reset rod 64 is pressed upwards at the moment, so that the static contact 65 is separated, the power failure of the device is realized, at the moment, the electro-rheological fluid 43 is changed from a solid state to a liquid state due to the power failure, the clamping block 45 cannot limit the conductive limiting block 51 and moves downwards under the action of the reset spring column 31, so that the file is ejected, in order to delay the time for ejecting the file, the file box is prevented from being clamped by the device, when the reset rod 64 is restored to the initial position under the action of the reset spring II 61, the magnetic block 63 moves downwards, at the moment, because the magnetic flux generated by the magnetic block 63 in the coil 62 is reduced, the coil 62 generates induction current, a magnetic field is generated to block the magnetic flux change of the coil 62, so that the magnetic block 63 has a tendency of moving upwards, the reset rod 64 moves upwards under the action of the magnetic block 63, and blocks the reset rod 64 from moving downwards, thereby prolonging the time for ejecting the document case, and the pressing piece 56 is moved inward by the return spring 54 to restore the dielectric plate 55 to the original position when the ejected document case is taken out.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.