CN212290157U

CN212290157U - Pedal type folder

Info

Publication number: CN212290157U
Application number: CN202021569359.8U
Authority: CN
Inventors: 曹长伟; 张成伟; 曹书朋; 覃宏祥; 杨再林
Original assignee: Shenzhen Changweixin Hardware Technology Co ltd
Current assignee: Shenzhen Changweixin Hardware Technology Co ltd
Priority date: 2020-08-02
Filing date: 2020-08-02
Publication date: 2021-01-05
Anticipated expiration: 2030-08-02

Abstract

The utility model discloses a foot-operated folder, which comprises an upper joint, a lower joint, a rotating device, a locking device, a slide block, a pedal plate and a first rotating shaft, the upper joint is hinged with the lower joint, the rotating device is fixed on the upper joint, the sliding block and the first rotating shaft are both connected with the rotating device, the pedal is fixed on the first rotating shaft and used for driving the rotating device to drive the sliding block to lock or unlock the upper joint and the lower joint, the locking device comprises a pedal rod, a stepped shaft and an elastic component, the pedal rod is rotatably connected with the upper joint, the upper joint is provided with a stepped hole, the stepped shaft passes through the stepped hole and is hinged with the pedal rod, the elastic component is located in the stepped hole, the first rotating shaft is provided with a second key groove, and the pedal rod and the elastic component are respectively used for driving the stepped shaft to move out of and be embedded into the second key groove. The utility model provides a foot-operated scray, user's locking and opening that can relax swiftly, it is more convenient to use.

Description

Pedal type folder

Technical Field

The utility model relates to a folding locking mechanism that the bicycle was used, concretely relates to foot-operated scray.

Background

In order to facilitate storage and carrying, most of existing bicycles are provided with folding devices for folding so as to reduce the volume of the bicycles, the folding devices are generally called as folders, an upper joint and a lower joint of a common folder are connected together through a connecting device, then a locking component is arranged on an operating handle to reinforce the connecting device and prevent the connecting device from loosening, the existing locking component mainly comprises a bolt or a key, when the upper joint and the lower joint need to be separated, the bolt on the operating handle is firstly pulled out or the key is pressed down, then the connecting device is opened by rotating the operating handle, and then the upper joint and the lower joint are separated; when the upper joint and the lower joint are combined together, the upper joint and the lower joint are connected through the connecting device by rotating the operating handle, and then the bolt on the handle is inserted into or presses the button on the handle, so that the folder is labor-consuming and time-consuming in locking and opening, and when the installation position of the folder is low, a user can operate the folder after bending down, and inconvenience is brought to the user.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a foot-operated scray, the user can easily swiftly lock and open, and it is more convenient to use.

The utility model discloses a technical scheme that foot-operated scray adopted is:

a pedal folder comprises an upper joint, a lower joint, a first shaft pin, a rotating device, a locking device and a sliding block, wherein one side of the upper joint and one side of the lower joint are hinged through the first shaft pin, the pedal folder is characterized by further comprising a pedal plate and a first rotating shaft, the rotating device is fixed on the upper joint, the sliding block and the first rotating shaft are both connected with the rotating device, the pedal plate is fixed on the first rotating shaft, two ends of the pedal plate are respectively a locking end and an opening end, the locking end and the opening end respectively drive the rotating device through the first rotating shaft to drive the sliding block to move towards and away from the upper joint so as to lock and open the upper joint and the lower joint which are buckled together, the locking device comprises a pedal rod, a stepped shaft and an elastic component, the pedal rod is rotatably connected with the upper joint, the pedal rod is positioned above the opening end, and a stepped hole matched with the stepped shaft is formed in the upper joint, the shoulder hole is the through-hole, the shoulder shaft includes staff and staff, the shoulder hole includes macropore and aperture, the shoulder shaft passes the shoulder hole and is connected with pedal rod is articulated through the staff, elastomeric element is located the staff, the elastomeric element cover is epaxial and withstands the staff in the staff, runway shape's first keyway has been seted up corresponding to the macropore of shoulder hole in the first pivot, the second keyway with staff matched with has been seted up to the bottom of first keyway one end, pedal rod is arranged in driving the staff and shifts out from the second keyway, elastomeric element is arranged in driving staff embedding first keyway and second keyway.

As a preferred scheme, the rotating device comprises a base, a connecting rod and a rotating assembly, wherein one end of the upper joint close to the lower joint is provided with a first groove, a first clamping groove and a second groove, the first clamping groove is positioned on one side opposite to the hinged connection side of the upper joint and the lower joint, the second groove is positioned between the first groove and the first clamping groove, the first groove and the first clamping groove are respectively communicated with two sides of the second groove, a semicircular third groove is arranged on one side wall of the first groove, the third groove is positioned between the hinged connection side of the upper joint and the lower joint and the second groove, the third groove is a through groove, the base is fixed in the first groove through screws, the rotating assembly is arranged on the base, one end of the first rotating shaft is connected with a pedal, the other end of the first rotating shaft penetrates through the third groove to be rotatably connected with the base, one end of the connecting rod is connected with a sliding block, The other end passes through the second recess and is connected with the runner assembly rotation, first draw-in groove is used for the top connection to link to each other with the slider.

According to a preferable scheme, one end, close to the upper joint, of the lower joint is provided with a fourth groove, a second clamping groove and a fifth groove, the second clamping groove is located on one side, opposite to the hinged connection side of the lower joint and the upper joint, the fifth groove is located between the fourth groove and the second clamping groove, two sides of the fifth groove are communicated with the fourth groove and the second clamping groove respectively, a semicircular sixth groove is formed in one side wall of the fourth groove and located between the hinged connection side of the upper joint and the lower joint and the fifth groove, the sixth groove is a through groove, after the lower joint and the upper joint are buckled, the base is located in the first groove and the fourth groove, the first rotating shaft is located in the third groove and the fifth groove, and the second clamping groove is used for connecting the lower joint and the sliding block.

Preferably, the rotating assembly includes a second rotating shaft, a first gear, a second gear, an eccentric wheel, a second shaft pin and two pull rings, bosses are oppositely disposed at two ends of the eccentric wheel, eccentric holes are formed in the bosses, the eccentric holes are through holes, two ends of the second rotating shaft are rotatably connected with the base respectively, the first gear is mounted on the second rotating shaft, the two pull rings are fixed on the bosses at two ends of the eccentric wheel respectively, the eccentric wheel is mounted on the second rotating shaft through the eccentric holes, the connecting rod is hinged with the two pull rings through the second shaft pin, the first rotating shaft is rotatably connected with the base, the second gear is mounted on the first rotating shaft, the first gear and the second gear are engaged with each other, and the eccentric wheel is used for driving the connecting rod to drive the sliding block to move.

Preferably, the large hole of the stepped hole is located at the bottom of the second groove and is aligned with the first key groove.

As the preferred scheme, be equipped with on the slider with second draw-in groove matched with second card platform, the second card platform is used for slider and lower clutch to link to each other.

Preferably, one end of the pedal rod is provided with a seventh groove, two opposite sides of the seventh groove are communicated, and the small shaft of the stepped shaft is positioned in the seventh groove and is hinged with the pedal rod.

Preferably, the elastic member is a compression spring.

The utility model discloses a foot-operated scray's beneficial effect is: when a user steps on the pedal rod downwards by feet, the pedal rod rotates downwards on the upper joint and drives the stepped shaft to move in the direction away from the second key groove in the stepped hole, when the large axial direction of the stepped shaft moves towards the small hole direction of the stepped hole, the elastic component deforms under the pressure of the large axial direction of the stepped shaft, when the large axial direction of the stepped shaft leaves the second key groove, the locking of the stepped shaft on the first rotating shaft is released, when the user continues to step on the opening end of the pedal plate downwards, the pedal plate drives the first rotating shaft to drive the rotating device to rotate, the rotating device drives the sliding block to slide towards the direction away from the upper joint and the lower joint, the locking of the upper joint and the lower joint is released, and the folder is in an opening state at the moment. Because the rotation of first pivot, the skew takes place for the counterpoint of the major axis of second keyway and step shaft, when the user stops stepping on the foot bar, during the major axis of step shaft imbeds first keyway under elastomeric element's resilience force to can prevent the automatic gyration of first pivot and arouse that rotating device automatic switch into the locking state. The user can open the folder easily and quickly by feet, and the use is more convenient.

When the user steps on the locking end of running-board downwards with the foot, running-board drive first pivot drives rotating device and rotates, the main shaft of step shaft slides along the circumference of first pivot in first keyway simultaneously, rotating device drives the slider and slides to the direction that is close to top connection and lower clutch, and then lock top connection and lower clutch, first pivot just rotates the second keyway and aligns with the main shaft of step shaft this moment, the main shaft of step shaft imbeds in the second keyway under elastomeric element's resilience force, the step shaft locks first pivot again, first pivot stall, top connection and lower clutch are locked by the slider this moment, the scray is in the locking state. The user also can lock the folder easily and quickly by feet, and the use is more convenient.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of a locking state of a pedal-type folder of the present invention;

fig. 2 is a schematic view of the open state of the pedal-type folder of the present invention;

fig. 3 is a schematic view of an upper joint of a pedal-type folder of the present invention;

fig. 4 is a schematic view of a rotating device of a pedal type folder of the present invention;

fig. 5 is a schematic view of an eccentric wheel of a pedal-type folder of the present invention;

fig. 6 is a schematic view of a locking device of a pedal-type folder of the present invention;

fig. 7 is a schematic view of a combination of a rotating device and a locking device of a pedal-type folder according to the present invention;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 9 is an enlarged view of portion B of FIG. 8;

fig. 10 is a schematic view of a slider of a pedal folder of the present invention.

Detailed Description

The invention will be further elucidated and described with reference to the following embodiments and drawings in which:

referring to fig. 1 to 3, a pedal folder includes an upper joint 1, a lower joint 2, a first axis pin 3, a rotating device 4, a locking device 5, a slider 6, a pedal 7 and a first rotating shaft 8. One sides of the upper joint 1 and the lower joint 2 are hinged through a first shaft pin 3.

When the upper joint 1 and the lower joint 2 are buckled together, a first groove 11, a first clamping groove 12 and a second groove 13 are respectively formed in one end, close to the lower joint 2, of the upper joint 1, the first clamping groove 12 is located on one side, opposite to the hinged connection side of the upper joint 1 and the lower joint 2, the second groove 13 is located between the first groove 11 and the first clamping groove 12, the first groove 11 and the first clamping groove 12 are respectively communicated with two sides of the second groove 13, a semicircular third groove 14 is formed in one side wall of the first groove 11, the third groove 14 is located between the hinged connection side of the upper joint 1 and the lower joint 2 and the second groove 13, and the third groove 14 is a through groove. One end of the lower joint 2 close to the upper joint 1 is provided with a fourth groove 21 corresponding to the first groove 12, a second groove 22 corresponding to the first groove 12, and a fifth groove 23 corresponding to the second groove 13, the second groove 22 is located on one side opposite to the hinged connection side of the upper joint 1 and the lower joint 2, the fifth groove 23 is located between the fourth groove 21 and the second groove 22, the fourth groove 21 and the second groove 22 are respectively communicated with two sides of the fifth groove 23, a semicircular sixth groove 24 is formed in one side wall of the fourth groove 21, the sixth groove 24 is located between the hinged connection side of the upper joint 1 and the lower joint 2 and the fifth groove 23, the sixth groove 24 is a through groove, and the sixth groove 24 is arranged corresponding to the third groove 14.

Referring to fig. 2 to 4, the rotating device 4 includes a base 41, a connecting rod 42 and a rotating component 43, the base 41 is fixed in the first groove 11 by four screws, one end of the connecting rod 42 is connected to the sliding block 6 by a screw, the other end passes through the second groove 13 and is rotatably connected to the rotating component 43, one end of the first rotating shaft 8 is connected to the pedal 7 by a screw, and the other end passes through the third groove 14 and is rotatably connected to the base 41. When the upper joint 1 and the lower joint 2 are buckled together, the base 41 is positioned in the first groove 11 and the fourth groove 21, the connecting rod 43 passes through the fifth groove 23, and the first rotating shaft 8 passes through the sixth groove 24.

Referring to fig. 2, 3 and 10, the slider 6 is provided with a first clamping table 61 and a second clamping table 62, and the number of the first clamping table 61 and the second clamping table 62 is two. Two first lands 61 mate with the first card slot 12 and two second lands 62 mate with the second card slot 22.

Referring to fig. 4 to 5, the rotating assembly 43 includes a second rotating shaft 431, a first gear 432, a second gear 433, an eccentric wheel 434, a second shaft pin 435, and two pull rings 436, wherein bosses 437 are disposed at two ends of the eccentric wheel 434, an eccentric hole 4371 is disposed on the bosses 437, the eccentric hole 4371 is a through hole, two ends of the second rotating shaft 431 are rotatably connected to the base 41, the first gear 432 is mounted on the second rotating shaft 431, the two pull rings 436 are fixed on the bosses 437 at two ends of the eccentric wheel 434, the eccentric wheel 434 is mounted on the second rotating shaft 431 through the eccentric hole 4371, the connecting rod 42 is hinged to the two pull rings 436 through the second shaft pin 435, the second gear 433 is mounted on the first rotating shaft 8, and the first gear 432 and the second gear 433 are engaged with each other.

Referring to fig. 1, 4 and 10, two ends of the pedal 7 are respectively a locking end 71 and an opening end 72, and the locking end 71 and the opening end 72 are located at two opposite sides of the first rotating shaft 8. When a user steps on the locking end 71 of the pedal 7, the pedal 7 drives the first rotating shaft 8 to rotate on the base 41, the first rotating shaft 8 drives the second gear 433 to rotate, the second gear 433 drives the first gear 432 to rotate, the first gear 432 drives the second rotating shaft 431 to rotate on the base 41, the second rotating shaft 431 drives the eccentric wheel 434 to rotate, the eccentric wheel 434 drives the two pull rings 436 to rotate towards the first axis pin 3, the two pull rings 436 drive the connecting rod 42 to move towards the first axis pin 3, the connecting rod 42 drives the sliding block 6 to slide towards the direction close to the upper joint 1 and the lower joint 2, the first clamping table 61 and the second clamping table 62 on the sliding block 6 are respectively embedded into the first clamping groove 12 and the second clamping groove 22, and at the same time, the sliding block 6 simultaneously clamps the upper joint 1 and the lower joint 2, the upper tab 1 and the lower tab 2 are thus locked together by means of the slider 6 and the folder is in the locked state.

When a user steps on the opening end 72 of the pedal 7, the pedal 7 drives the first rotating shaft 8 to rotate on the base 41, the first rotating shaft 8 drives the second gear 433 to rotate, the second gear 433 drives the first gear 432 to rotate, the first gear 432 drives the second rotating shaft 431 to rotate on the base 41, the second rotating shaft 431 drives the eccentric wheel 434 to rotate, the eccentric wheel 434 drives the two pull rings 436 to rotate towards the side far away from the first shaft pin 3, the two pull rings 436 drive the connecting rod 42 to move towards the side far away from the first shaft pin 3, the connecting rod 42 drives the sliding block 6 to slide towards the direction far away from the upper joint 1 and the lower joint 2, the first clamping table 61 and the second clamping table 62 on the sliding block 6 are respectively moved out of the first clamping groove 12 and the second clamping groove 22, at this time, the locking of the sliding block 6 with the upper joint 1 and the lower joint 2 is released, the upper joint 1 and the lower joint 2 are opened.

Referring to fig. 1, 3, 6 to 9, the locking device 5 includes a foot lever 51, a stepped shaft 52 and a compression spring 53, wherein one end of the foot lever 51 is provided with a seventh groove 511, the seventh groove 511 is a through groove, the foot lever 51 is rotatably connected with the upper joint 1, and the foot lever 51 is located above the opening end 72 of the foot pedal 7. The bottom of the third groove 14 of the upper joint 1 is provided with a stepped hole 15 matched with the stepped shaft 52, the large shaft 521 of the stepped shaft 52 is positioned in the large hole 151 of the stepped hole 15, the compression spring 53 is sleeved on the small shaft 522 of the stepped shaft 52, the small shaft 522 of the stepped shaft 52 sequentially penetrates through the large hole 151 of the stepped hole 15 and the small hole 152 of the stepped hole 15 and then is hinged with the pedal lever 51, and the small shaft 522 of the stepped shaft 52 is positioned in the seventh groove 511. The compression spring 53 is located in the large hole 151 of the stepped hole 15, and the compression spring 53 abuts on the end surface of the large shaft 521 of the stepped shaft 52.

Referring to fig. 1, 4 and 9, a race track-shaped first key groove 81 is formed on the circumferential surface of the first rotating shaft 8 along the circumferential direction, a second key groove 82 is formed at the bottom of one end of the first key groove 81, and the second key groove 82 is matched with the large shaft 521 of the shaft 52. When the upper joint 1 and the lower joint 2 are fastened together, the stepped hole 15 corresponds to the first key groove 81.

Referring to fig. 1, 6 to 9, when the user steps on the foot lever 51, the foot lever 51 rotates around the upper joint 1 and drives the stepped shaft 52 to move along the stepped hole 15 in a direction away from the first rotating shaft 8, the large shaft 521 of the stepped shaft 52 moves towards the small hole 152 of the stepped hole 15 and compresses the compression spring 53, when the large shaft 521 of the stepped shaft 52 moves out of the second key slot 82, the locking of the first rotating shaft 8 by the stepped shaft 52 is released, the user continues to step down on the opening end 72 of the foot pedal 7, the foot pedal 7 drives the first rotating shaft 8 to rotate on the base 41 and further releases the locking of the slider 6 with the upper joint 1 and the lower joint 2, when the user releases the foot, the large shaft 521 of the stepped shaft 52 is clamped into the first key slot 81 under the resilience of the compression spring 53, and although the resilience of the compression spring 53 is not completely released, the first rotating shaft 8 rotates, the second key groove 82 is offset from the stepped hole 15, and the large shaft 521 of the stepped shaft 52 cannot be inserted into the second key groove 82, so that the folder can be conveniently and quickly opened.

When the folder needs to be locked, a user steps on the locking end 71 of the pedal 7 with a foot, the pedal 7 drives the first rotating shaft 8 to rotate on the base 41, the large shaft 521 of the stepped shaft 52 slides in the first key groove 81 along the circumference of the first rotating shaft 8, when the slider 6 locks the upper joint 1 and the lower joint 2, the first rotating shaft 8 just rotates to the position where the second key groove 82 is aligned with the stepped hole 15, the large shaft 521 of the stepped shaft 52 is re-embedded into the second key groove 82 under the action of the resilience force of the compression spring 53, the stepped shaft 52 locks the first rotating shaft 8, and at the moment, the first rotating shaft 8 stops rotating, so that the folder is conveniently and quickly locked, and the locking device 5 can effectively prevent the condition that the upper joint 1 and the lower joint 2 are accidentally opened due to the mistaken rotation of the pedal 7.

Referring to fig. 2 and 9, since the first key groove 81 is formed, when the upper joint 1 and the lower joint 2 are in an open state, the large shaft 521 of the stepped shaft 52 is inserted into the first key groove 81 under the resilient force of the compression spring 53, so that the first rotating shaft 8 is effectively prevented from automatically rotating and the rotating device 4 is automatically switched to the locked state.

In summary, the pedal 7 is connected to the rotating device 4 through the first rotating shaft 8, when the user steps on the opening end 72 of the pedal 7, the rotating device 4 drives the sliding block 6 to move away from the upper joint 1 and the lower joint 2, and the folder is in the open state without the connection of the sliding block 6 between the upper joint 1 and the lower joint 2. When a user steps on the locking end 71 of the pedal 7, the rotating device 4 drives the sliding block 6 to move towards the direction close to the upper joint 1 and the lower joint 2, and the sliding block 6 is clamped into the first clamping groove 12 and the second clamping groove 22 through the first clamping table 61 and the second clamping table 62 respectively, so that the upper joint 1 and the lower joint 2 are connected together through the sliding block 6, and the folder is in a locking state. By rotatably connecting the foot lever 51 with the upper joint 1, the step shaft 52 is hinged with the foot lever 51, when the user steps on the foot lever 51, the foot lever 51 drives the stepped shaft 52 to move in the stepped hole 15, and the large shaft 521 of the stepped shaft 52 compresses the compression spring 53, when the large shaft 521 of the stepped shaft 52 is removed from the second key groove 82, the stepped shaft 52 unlocks the first rotating shaft 8, and at this time, the first rotating shaft 8 can be rotated by the foot pedal 7, when the stepped shaft 52 enters the second key groove 82 by the resilient force of the compression spring 53, the automatic revolution of the first rotary shaft 8 can be prevented, since the foot lever 51 is disposed above the open end 72 of the foot board 7, the user only has to step on the foot once, namely, the unlocking of the first rotating shaft 8 by the stepped shaft 52 and the locking of the upper joint 1 and the lower joint 2 by the slider 6 can be simultaneously realized. By providing the compression spring 53, the user can lock the upper joint 1 and the lower joint 2 by the slider 6 and lock the first rotating shaft 8 by the stepped shaft 52 only by stepping on the locking end 71 of the foot pedal 7 once. Therefore, the operation is more convenient, and the user can lock and unlock the folder easily and quickly by feet.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A pedal folder comprises an upper joint, a lower joint, a first shaft pin, a rotating device, a locking device and a sliding block, wherein one side of the upper joint and one side of the lower joint are hinged through the first shaft pin, the pedal folder is characterized by further comprising a pedal plate and a first rotating shaft, the rotating device is fixed on the upper joint, the sliding block and the first rotating shaft are both connected with the rotating device, the pedal plate is fixed on the first rotating shaft, two ends of the pedal plate are respectively a locking end and an opening end, the locking end and the opening end respectively drive the rotating device through the first rotating shaft to drive the sliding block to move towards and away from the upper joint so as to lock and open the upper joint and the lower joint which are buckled together, the locking device comprises a pedal rod, a step shaft and an elastic component, the pedal rod is rotatably connected with the upper joint, and the pedal rod is positioned above the opening end, offer on the top connection with step shaft complex shoulder hole, the shoulder hole is the through-hole, the shoulder shaft includes staff and staff, the shoulder hole includes macropore and aperture, the shoulder shaft passes the shoulder hole and is connected with pedal lever is articulated through the staff, elastomeric element is located the staff, elastomeric element overlaps on the staff and withstands the staff, set up the first keyway of runway shape corresponding to the macropore of shoulder hole in the first pivot, the second keyway with staff matched with is seted up to the bottom of first keyway one end, pedal lever is used for driving the staff and shifts out from the second keyway, elastomeric element is arranged in driving the first keyway of staff embedding and second keyway.

2. The pedal-type folder as claimed in claim 1, wherein the rotating device comprises a base, a connecting rod and a rotating component, one end of the upper joint close to the lower joint is provided with a first groove, a first clamping groove and a second groove, the first clamping groove is positioned at the opposite side of the hinged connection side of the upper joint and the lower joint, the second groove is positioned between the first groove and the first clamping groove, two sides of the second groove respectively communicate the first groove and the first clamping groove, one side wall of the first groove is provided with a semicircular third groove, the third groove is positioned between the hinged connection side of the upper joint and the lower joint and the second groove, the third groove is a through groove, the base is fixed in the first groove through screws, the rotating component is mounted on the base, one end of the first rotating shaft is connected with the pedal, and the other end of the first rotating shaft passes through the third groove to be rotatably connected with the base, one end of the connecting rod is connected with the sliding block, the other end of the connecting rod penetrates through the second groove to be connected with the rotating assembly in a rotating mode, and the first clamping groove is used for connecting the upper joint with the sliding block.

3. The pedal-powered folder according to claim 2, wherein a fourth groove, a second groove and a fifth groove are formed in one end of the lower joint close to the upper joint, the second groove is located on the opposite side of the hinged connection side of the lower joint and the upper joint, the fifth groove is located between the fourth groove and the second groove, two sides of the fifth groove are respectively communicated with the fourth groove and the second groove, a semicircular sixth groove is formed in one side wall of the fourth groove, the sixth groove is located between the hinged connection side of the upper joint and the lower joint and the fifth groove, the sixth groove is a through groove, after the lower joint and the upper joint are fastened, the base is located in the first groove and the fourth groove, the first rotating shaft is located in the third groove and the fifth groove, and the second groove is used for connecting the lower joint and the slider.

4. The pedal-type folder according to claim 2, wherein the rotating assembly comprises a second rotating shaft, a first gear, a second gear, an eccentric wheel, a second shaft pin and two pull rings, bosses are oppositely arranged at two ends of the eccentric wheel, eccentric holes are formed in the bosses, the eccentric holes are through holes, two ends of the second rotating shaft are rotatably connected with the base respectively, the first gear is mounted on the second rotating shaft, the two pull rings are fixed on the bosses at two ends of the eccentric wheel respectively, the eccentric wheel is mounted on the second rotating shaft through the eccentric holes, the connecting rod is hinged with the two pull rings through the second shaft pin, the first rotating shaft is rotatably connected with the base, the second gear is mounted on the first rotating shaft, the first gear and the second gear are meshed with each other, and the eccentric wheel is used for driving the connecting rod to drive the sliding block to move.

5. The pedal folder of claim 2 wherein the larger opening of the stepped bore is located at the bottom of the second recess and is aligned with the first keyway.

6. The pedal-operated folder according to claim 2, wherein the sliding block is provided with a first clamping platform matched with the first clamping groove, and the first clamping platform is used for connecting the sliding block with the lower joint.

7. The pedal folder as recited in claim 5, wherein the sliding block is provided with a second clamping platform matched with the second clamping groove, and the second clamping platform is used for connecting the sliding block with the lower joint.

8. The pedal-operated folder according to claim 1, wherein one end of the pedal rod is provided with a seventh groove, two opposite sides of the seventh groove are through, and the small shaft of the stepped shaft is positioned in the seventh groove and is hinged to the pedal rod.

9. The pedal folder as set forth in any one of claims 1 through 8, wherein said elastic member is a compression spring.