CN213593999U

CN213593999U - Delay circuit breaking device for electric pencil sharpener and electric pencil sharpener

Info

Publication number: CN213593999U
Application number: CN202022582266.5U
Authority: CN
Inventors: 殷杰; 陈晓平; 叶余嘉; 刘学肸
Original assignee: Shanghai M&G Stationery Inc
Current assignee: Shanghai M&G Stationery Inc
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-07-02
Anticipated expiration: 2030-11-10

Abstract

The utility model provides a time delay circuit breaking device for an electric pencil sharpener and the electric pencil sharpener, which comprises a connecting rod, a connecting piece, a bottom plate, a first gear, a control switch, a moving block and a driving part, wherein the surface of the connecting rod, which is axially adjacent to the bottom, is provided with an annular tooth; the top of the connecting piece is provided with a first through hole, and one end of the connecting rod, which is close to the bottom in the axial direction, passes through the first through hole and is arranged in the connecting piece; the first gear is arranged on the bottom plate; the control switch is arranged outside the connecting piece, and one plane of the control switch is provided with a contact; the moving block is arranged below the control switch; the transmission member is arranged on one side of the radial plane of the first gear. The utility model discloses still including adopting the electronic ware of cutting of the time delay breaker who is used for electronic ware of cutting. The utility model discloses a time delay circuit breaker for electronic ware of cutting sharpens at the pencil and cuts sharp the completion back, and the time delay is opened circuit, prevents not sharpening or excessively cutting, in the time delay period, for the pencil cuts the face deburring, reaches the light pen effect, improves consumer experience quality.

Description

Delay circuit breaking device for electric pencil sharpener and electric pencil sharpener

Technical Field

The utility model relates to a stationery field, concretely relates to a time delay circuit breaker and electronic ware of cutting for electronic ware of cutting.

Background

Most electric pencil sharpeners in the market are used, a motor of the electric pencil sharpeners drives a cutter to cut a pencil all the time, and a consumer cannot judge whether the pencil is cut completely or not in the using process, so that the phenomenon that the pencil is taken out without sharpening or the pencil is taken out after being excessively cut easily occurs, the experience of the consumer is damaged, and the waste of pencil resources is easily caused.

Therefore, there is a need for a device for automatic sharpening of pencil and an electric sharpener thereof, which is used for a pencil sharpener and can be stopped after sharpening.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pencil sharpens device and electronic ware of cutting of time delay shut down and automatic light pen after accomplishing, carries out the time delay and opens circuit after the pencil sharpens, automatic light pen during the time delay to auto-stop after the time delay.

In order to solve the technical problem, the utility model provides a time delay circuit breaker for electronic ware of cutting, include:

a connecting rod, a connecting piece, a bottom plate, a first gear, a control switch, a moving block and a driving piece, wherein,

the surface of the connecting rod, which is axially adjacent to the bottom, is provided with annular teeth;

the top of the connecting piece is provided with a first through hole, one end of the connecting rod, which is close to the bottom, in the axial direction passes through the first through hole and penetrates through the connecting piece, and the connecting rod can move in the axial direction relative to the connecting piece;

the first gear is arranged on the bottom plate, and when the connecting rod moves towards the direction close to the bottom plate until the annular tooth and the first gear are basically in the same plane, the first gear is meshed with the annular tooth;

the control switch is arranged outside the connecting piece, one plane of the control switch is provided with a contact, and the contact is used for controlling the control switch;

the moving block is arranged below the control switch, when the contact is in mutual contact with the moving block, the control switch controls the electric pencil sharpener to start sharpening operation, and when the contact is not in mutual contact with the moving block, the control switch controls the electric pencil sharpener to stop working;

the transmission part is arranged to be linked with the first gear, when the connecting rod rotates and the first gear is meshed with the annular teeth, the first gear rotates and drives the transmission part to enable the transmission part to approach and finally act on the moving block, so that the moving block moves to be not in contact with the contact, and the electric pencil sharpener is controlled to stop working after a pencil sharpening operation is carried out;

when sharpening of a pencil inserted into the electric pencil sharpener is completed, the connecting rod is pressed downwards to enable the connecting rod to move downwards relative to the connecting piece, the annular teeth are meshed with the first gear to drive the first gear to rotate, the first gear drives the transmission piece to approach and finally act on the moving block, so that the moving block and the contact are far away from each other and are not in contact with each other, the first gear rotates to drive the transmission piece to enable the moving block to be far away from the contact, so that a time delay is formed, the electric pencil sharpener completes the light pencil operation during the time delay, and when the moving block moves to be not in contact with the contact, the electric pencil sharpener stops working.

Furthermore, a first elastic piece is arranged at the bottom of the connecting rod and used for enabling the connecting rod to restore to the initial position under the action of no other external force; the first gear is provided with a second elastic piece, the second elastic piece comprises a first end positioned in the center and a second end far away from the center, the first end is connected with the first gear, and the second end is connected with the bottom plate so that the first gear can restore to the initial position without the action of other external force; and one end of the moving block is provided with a third elastic piece for restoring the initial position of the moving block under the action of no other external force.

Further, the transmission part is an arc gear which is concentrically and fixedly arranged with the first gear; the moving block is provided with a tooth-shaped structure matched with the circular arc gear; a support piece is arranged on the bottom plate, and the moving block is assembled on the support piece so that the tooth-shaped structure can be matched with the circular arc gear;

when the first gear rotates, the circular arc gear is driven to rotate simultaneously, the teeth of the circular arc gear rotate and are finally meshed with the tooth-shaped structure, and the circular arc gear acts on the moving block to enable the moving block to move towards the direction far away from the contact.

Furthermore, the supporting piece is of a floating bridge structure and comprises two vertical supporting columns and a cross beam, the vertical supporting columns are located at two ends of the cross beam, the top ends of the vertical supporting columns extend outwards along the direction parallel to the plane of the bottom plate to be connected with two ends of the cross beam in the length direction respectively, and the cross beam is suspended and located above the first gear; the beam is internally provided with a groove, the moving block is provided with a lug matched with the groove, and the lug is embedded into the groove and can move in the groove.

Furthermore, a baffle is arranged at one end of the cross beam in the length direction, the third elastic piece is a spring, and the third elastic piece is connected to the baffle.

Further, the transmission part comprises a transmission rod and a sliding block; the two axial ends of the transmission rod are respectively connected with the first gear and the sliding block; the bottom plate is provided with a sliding chute, and the sliding block is matched with the sliding chute and can move relative to the sliding chute;

when the first gear rotates, the transmission rod is driven, the transmission rod drives the sliding block to move along the sliding groove, and the sliding block moves to be in contact with and acts on the moving block, so that the moving block moves to be not in contact with the contact.

Furthermore, the bottom plate is provided with a first clamping groove, the third elastic piece is an elastic piece, and one end, far away from the moving block, of the third elastic piece is connected with the first clamping groove in a matched mode.

Further, the axial both ends of transfer line are equipped with the ring respectively, first gear is equipped with first mounting in eccentric position, be equipped with the second mounting on the slider, first mounting and second mounting respectively with the axial both ends of transfer line the ring is with joint mode clearance fit connection.

The utility model also provides an electric pencil sharpener, which comprises the delay circuit breaking device for the electric pencil sharpener, an inclined pressing block, a motor and a second gear, wherein,

the inclined pressing block is arranged above the connecting rod;

the motor is connected with the second gear and used for rotating the second gear;

a second through hole is formed in the middle of the second gear, and the connecting rod penetrates through the second through hole and can axially move relative to the second gear;

the middle section of the connecting rod is of a special-shaped structure, so that the connecting rod can rotate under the driving of the second gear and is not easy to slide radially;

when a pencil is inserted into the pencil sharpener, the connecting piece moves towards the direction of the bottom plate under the action of external force, and the contact is in contact with the moving block below, so that the motor works and the pencil sharpener completes cutting operation; the motor drives the second gear, so that the connecting rod rotates; under the cutting action, the length of the pen point is gradually increased to abut against and act on the inclined pressing block, and the inclined pressing block moves downwards to push the connecting rod so as to enable the pencil sharpener to be in delayed circuit breaking.

Furthermore, a fourth elastic piece is arranged at the bottom of the connecting piece and used for enabling the connecting piece to recover to the initial position under the action of no external force; the bottom plate is provided with an elastic piece clamping groove, and one end of the fourth elastic piece is arranged in the elastic piece clamping groove.

It will be appreciated that certain terms are defined herein, such as "top", "bottom", "up" and "down", with reference to the upright position of the sharpener, as will become more apparent in the following description with reference to the drawings.

The utility model has the advantages that:

1. the utility model discloses an electronic ware of cutting a pencil that is used for electronic time delay unit who cuts a ware and adopts device utilizes mechanical structure, cuts the pencil and realizes the time delay operation after the completion of sharpening to auto-stop after the time delay operation prevents not sharpening or excessively cuts, improves consumer experience quality.

2. The utility model discloses a time delay circuit breaker and adopt device's electronic ware of cutting for electronic ware of cutting a pencil allows to carry out the light pen operation in the time delay after the pencil is sharpened and is accomplished, for the pencil cutting face deburring, reaches the light pen effect.

Drawings

The foregoing summary, as well as the following detailed description of the present invention, will be better understood when read in conjunction with the appended drawings. It is to be noted that the figures are only intended as examples of the claimed solution. In the drawings, like reference characters designate the same or similar elements.

Fig. 1 is a schematic view of a delay cut-off device for an electric pencil sharpener according to an embodiment of the present invention;

fig. 2 is a schematic view of a second elastic member according to an embodiment of the present invention;

fig. 3 is a schematic view of a base plate according to an embodiment of the present invention;

fig. 4a is a schematic view of a moving block according to an embodiment of the present invention;

fig. 4b is a schematic view of a third elastic member according to an embodiment of the present invention;

FIG. 5 is a schematic view of an electric pencil sharpener according to an embodiment of the present invention;

fig. 6a is a schematic view of a connector according to an embodiment of the present invention;

fig. 6b is a schematic bottom view of a connector according to an embodiment of the present invention;

fig. 6c is a schematic front view of a connector according to an embodiment of the present invention;

fig. 7 is a schematic view of a connecting rod according to an embodiment of the present invention;

fig. 8 is a schematic view of a time delay trip for an electric sharpener according to another embodiment of the present invention;

fig. 9 is a schematic view of a moving block and a third elastic member according to another embodiment of the present invention;

fig. 10 is a schematic view of a base plate of another embodiment of the present invention;

figure 11a is a schematic view of a drive link of another embodiment of the present invention;

fig. 11b is a schematic view of a slider according to another embodiment of the present invention;

fig. 11c is a schematic view of a first gear and a first fixing member according to another embodiment of the present invention;

fig. 12 is a schematic view of an electric pencil sharpener according to another embodiment of the present invention. Wherein the reference numerals are as follows:

10 pencil sharpener

11 inclined pressing block

12 second gear

121 second through hole

100 connecting rod

101 ring tooth

102 first elastic member

200 connecting piece

201 first via

202 fourth elastic member

300 bottom plate

301 elastic piece slot

310 support member

311 support column

312 Cross member

3121 groove

3122 baffle plate

320 chute

330 first card slot

400 first gear

410 second elastic member

411 first end

412 second end

420 first fixing member

500 control switch

600 moving block

601 third elastic member

602 tooth form structure

603 bump

700 transmission piece

701 transmission rod

7011 circular ring

702 slider

7021 second fixing part

Detailed Description

The detailed features and advantages of the present invention are described in detail in the detailed description, which is sufficient for anyone skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention can be easily understood by those skilled in the art from the description, the claims and the accompanying drawings disclosed in the present specification.

In one embodiment, fig. 1 is a schematic view of a delay circuit breaker for an electric pencil sharpener according to one embodiment of the present invention, fig. 2 is a schematic view of a second elastic member according to one embodiment of the present invention, fig. 3 is a schematic view of a base plate according to one embodiment of the present invention, fig. 4a is a schematic view of a moving block according to one embodiment of the present invention, fig. 4b is a schematic view of a third elastic member according to one embodiment of the present invention, fig. 5 is a schematic view of an electric pencil sharpener according to one embodiment of the present invention, fig. 6a is a schematic view of a connecting member according to one embodiment of the present invention, fig. 6b is a schematic view of a connecting member according to one embodiment of the present invention, fig. 6c is a schematic view of a front view of a connecting member according to one embodiment of the present invention, fig. 7 is a schematic view of a connecting rod according to an embodiment of the present invention.

As shown in fig. 1 and 7, the delay cut-off device for an electric pencil sharpener of this embodiment includes: the connecting rod 100, the connecting piece 200, the bottom plate 300, the first gear 400, the control switch 500, the moving block 600 and the transmission piece 700, wherein the surface of the connecting rod 100, which is axially adjacent to the bottom, is provided with annular teeth 101; the top of the connecting piece 200 is provided with a first through hole 201, one end of the connecting rod 100, which is close to the bottom, in the axial direction passes through the first through hole 201 and penetrates through the connecting piece 200, and the connecting rod 100 can move in the axial direction relative to the connecting piece 200; the first gear 400 is arranged on the bottom plate 300, and when the connecting rod 100 moves towards the direction close to the bottom plate 300 until the annular tooth 101 and the first gear 400 are basically in the same plane, the first gear 400 is meshed with the annular tooth 101; the control switch 500 is disposed outside the connector 200, and one plane of the control switch 500 is provided with a contact (not shown) for controlling the control switch 500; the moving block 600 is arranged below the control switch 500, when the contact point and the moving block 600 are contacted with each other, the control switch 500 controls the electric pencil sharpener to start sharpening operation, and when the contact point and the moving block 600 are not contacted with each other, the control switch 500 controls the electric pencil sharpener to stop working; the transmission member 700 is configured to be linked with the first gear 400, when the connecting rod 100 rotates and the first gear 400 is engaged with the annular tooth 101, the first gear 400 rotates and drives the transmission member 700 to enable the transmission member 700 to approach and finally act on the moving block 600, so that the moving block 600 moves to be not in contact with a contact point, and therefore the electric pencil sharpener is controlled to stop working after a pencil sharpening operation is performed during a delay time.

It can be understood that when the pencil is cut, the contact of the control switch is in a contact state with the moving block below the control switch, the electric pencil sharpener works, and the connecting rod is in a rotating state.

It should be noted that any suitable type of switch may be used for the control switch, and in this embodiment, a microswitch is used for the control switch.

When sharpening of a pencil inserted into the electric pencil sharpener is completed, the connecting rod 100 is pressed downwards (the process of pressing the connecting rod is shown in the following reference to fig. 5), so that the connecting rod 100 moves downwards relative to the connecting piece, the annular teeth 101 are meshed with the first gear 400, the first gear 400 is driven to rotate, the first gear 400 drives the transmission piece 700 to approach and finally act on the moving block 600, the moving block 600 and the contact are far away from each other and not in contact with each other, the process that the first gear 400 rotates to drive the transmission piece 700 to make the moving block 600 far away from the contact forms a time delay, during the time delay, the electric pencil sharpener is controlled to complete pencil sharpening operation, and when the moving block 600 moves to be not in contact with the contact, the electric pencil sharpener is controlled to stop working.

It can be understood that the transmission part approaches and finally acts on the moving block to enable the moving block to be far away from the contact, so that the function of delayed circuit breaking is achieved, and in the time delay period, burrs on the pencil cutting surface are removed by a corresponding mechanism of the electric pencil sharpener, so that the function of a light pencil is achieved; after the time delay, the electric pencil sharpener stops working, excessive sharpening is prevented, and the experience of consumers is improved.

As shown in fig. 2, 4a, 4b and 7, a first elastic member 102 is disposed at the bottom of the connecting rod 100 to restore the connecting rod 100 to an initial position without any other external force; the first gear 400 is provided with a second elastic member 410, the second elastic member 410 comprises a first end 411 positioned in the center and a second end 412 far away from the center, the first end 411 is connected with the first gear 400, and the second end 412 is connected with the bottom plate 300, so that the first gear 400 can restore to the initial position without other external forces; one end of the moving block 600 is provided with a third elastic member 601 for restoring the moving block 600 to an initial position without any other external force.

It can be understood that after sharpening and polishing of the pencil are completed, when a consumer takes out the pencil, no external force is applied to the axial top of the connecting rod, and the connecting rod axially moves upwards under the action of the first elastic piece and returns to the initial position; the connecting rod restores to the initial position, the annular tooth is not meshed with the first gear and does not act on the first gear, and the first gear restores to the initial position under the action of the second elastic piece to drive the transmission piece to restore to the initial position; the transmission piece restores to the initial position and does not act on the moving block, and the moving block restores to the initial position under the action of the third elastic piece.

It should be noted that any suitable tool having the property of recovering from the original state without the external force may be used for the first elastic member, the second elastic member, and the third elastic member.

In this embodiment, the transmission member 700 is a circular arc gear; the moving block 600 has a tooth structure 602 matched with the circular arc gear 700; the base plate 300 is provided with a support 310, and the moving block 600 is assembled to the support 310 so that the tooth-shaped structure 602 is matched with the circular arc gear 700; when the first gear 400 rotates, the arc gear 700 is driven to rotate simultaneously, teeth of the arc gear 700 rotate and are finally meshed with the tooth-shaped structure 602, the arc gear 700 acts on the moving block 600 to enable the moving block 600 to move in a direction away from the contact, the moving block 600 is enabled to be not in contact with the contact, and the electric pencil sharpener stops cutting pencils.

As shown in fig. 1 and 3, the support 310 is a floating bridge structure, the support 310 includes two upright support columns 311 and a cross beam 312, the upright support columns 311 are located at two ends of the cross beam 312, the top ends of the upright support columns 311 extend outwards along a direction parallel to the plane of the bottom plate 300 to be respectively connected with two ends of the cross beam 312 in the length direction, and the cross beam 312 is suspended and located above the first gear 400; the cross beam 312 is internally provided with a groove 3121, the moving block 600 is provided with a lug 603 matched with the groove 3121, the lug 603 is embedded in the groove 3121, and the moving block 600 moves in the groove 3121.

A baffle 3122 is provided at one end of the beam 312 in the length direction, the third elastic member 601 is a spring, and the third elastic member 601 is connected to the baffle 3122.

It can be understood that one end of the third elastic member 601 is fixed to the blocking plate 3122 to make the moving block 600 have a tendency to move along the cross beam 312.

Another aspect of the embodiment provides an electric sharpener, which is described with reference to FIG. 5.

As shown in fig. 5, the electric pencil sharpener 10 includes the time-delay circuit-breaking device for an electric pencil sharpener in the present embodiment, and further includes a ramp block 11, a motor (not shown), and a second gear 12, the ramp block 11 being disposed above the connecting rod 100; the motor is connected with the second gear 12 and used for rotating the second gear 12; a second through hole 121 is formed in the middle of the second gear 12, and the connecting rod 100 passes through the second through hole 121 and can axially move relative to the second gear 12; the middle section of the connecting rod is of a special-shaped structure, so that the connecting rod 100 is not easy to slide radially when being driven by the second gear 12 to rotate.

It should be noted that the middle section of the connecting rod can adopt any suitable special-shaped structure, and in this embodiment, the middle section of the connecting rod is a rectangular column structure.

When a pencil is inserted into the sharpener 10, the connecting member 200 moves toward the bottom plate 300 under the action of an external force, and the contact contacts with the moving block 600 below, so that the motor works and the sharpener 10 completes the cutting operation; the motor drives the second gear 12, thereby rotating the link 100; under the cutting action, the length of the pen point is gradually increased, the pen point is propped against and acts on the inclined pressing block 11, the inclined pressing block 11 moves downwards, the connecting rod 100 is pushed, and then the delayed circuit break of the pencil sharpener 10 is triggered.

As shown in fig. 6a to 6c and fig. 3, the bottom of the connecting member 200 is provided with a fourth elastic member 202 for restoring the connecting member 200 to the initial position without external force; the bottom plate 300 is provided with an elastic member slot 301, and one end of the fourth elastic member 202 is disposed in the elastic member slot 301.

It will be appreciated that when the pencil is cut and the pencil is polished and removed from the sharpener, no downward force is applied to the connecting member, and the connecting member returns to its original position by the fourth resilient member.

It should be noted that any suitable tool having a resilient property without an external force can be used for the fourth elastic member, and in this embodiment, a spring is used for the fourth elastic member.

In another embodiment, fig. 8 is a schematic diagram of a delay circuit breaker for an electric pencil sharpener according to another embodiment of the present invention, fig. 9 is a schematic diagram of a moving block and a third elastic member according to another embodiment of the present invention, fig. 10 is a schematic diagram of a bottom plate according to another embodiment of the present invention, fig. 11a is a schematic diagram of a transmission rod according to another embodiment of the present invention, fig. 11b is a schematic diagram of a slider according to another embodiment of the present invention, fig. 11c is a schematic diagram of a first gear and a first fixing member according to another embodiment of the present invention, and fig. 12 is a schematic diagram of an electric pencil sharpener according to another embodiment of the present invention.

As shown in fig. 8, the delay cut-off device for the electric pencil sharpener of this embodiment includes: connecting rod 100, connecting piece 200, bottom plate 300, first gear 400, control switch 500, movable block 600 and driving medium 700, connecting rod 100 bottom is equipped with first elastic component 102, and first gear 400 is equipped with second elastic component 410, and movable block 600 one end is equipped with third elastic component 601, and is similar to the time delay circuit breaker who is used for electronic sharpener of fig. 1 ~ 4, and the difference is:

in this embodiment, the transmission member 700 includes a transmission rod 701 and a slider 702; two axial ends of the transmission rod 701 are respectively connected with the first gear 400 and the sliding block 702; the bottom plate 300 is provided with a sliding groove 320, and the sliding block 702 is matched with the sliding groove 320 and can move relative to the sliding groove 320;

when the first gear 400 rotates, the driving rod 701 is driven, the driving rod 701 drives the sliding block 702 to move along the sliding groove 320, the sliding block 702 moves to contact and acts on the moving block 600, so that the moving block 600 moves to be not in contact with the contact, and the electric pencil sharpener 10 stops sharpening the pencil.

As shown in fig. 9 to 10, the bottom plate 300 is provided with a first engaging groove 330, the third elastic member 601 is a resilient piece, and one end of the third elastic member 601 far away from the moving block 600 is connected to the first engaging groove 330 in a matching manner.

It can be understood that one end of the third elastic member 601 is fixed in the first engaging groove 330, so that the moving block 600 tends to move along the sliding groove 320.

As shown in fig. 11a to 11c, two axial ends of the transmission rod 701 are respectively provided with a circular ring 7011, a first fixing part 420 is disposed at a position of the first gear 400 close to the edge, a second fixing part 7021 is disposed at one end of the sliding block 702 along the moving direction, and both the first fixing part 420 and the second fixing part 7021 may be cylindrical structures; the first fixing part 420 and the second fixing part 7021 are respectively provided with a circular ring 7011 at two axial ends of the transmission rod 701 for movable fit connection in a joint mode.

Another aspect of the embodiment provides an electric sharpener, which is described with reference to FIG. 12.

As shown in fig. 12, the electric sharpener includes the time-delay breaking device for the electric sharpener in the present embodiment, and further includes a ramp block 11, a motor (not shown) and a second gear 12, similar to the electric sharpener of fig. 5.

The terms and expressions which have been employed are used as terms of description and not of limitation. The use of such terms and expressions is not intended to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications may be made within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be looked to in order to cover all such equivalents.

Also, it should be noted that, although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention, and that various equivalent changes or substitutions can be made without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments within the scope of the present invention be included in the claims of the present invention.

Claims

1. A time delay trip apparatus for an electric sharpener, comprising: a connecting rod, a connecting piece, a bottom plate, a first gear, a control switch, a moving block and a driving piece, wherein,

2. The apparatus of claim 1, wherein the link has a first elastic member at a bottom thereof for restoring the link to an initial position without any external force; the first gear is provided with a second elastic piece, the second elastic piece comprises a first end positioned in the center and a second end far away from the center, the first end is connected with the first gear, and the second end is connected with the bottom plate so that the first gear can restore to the initial position without the action of other external force; and one end of the moving block is provided with a third elastic piece for restoring the initial position of the moving block under the action of no other external force.

3. The delayed release mechanism for an electric sharpener of claim 2, wherein said drive member is an arc gear fixedly disposed concentrically with said first gear; the moving block is provided with a tooth-shaped structure matched with the circular arc gear; a support piece is arranged on the bottom plate, and the moving block is assembled on the support piece so that the tooth-shaped structure can be matched with the circular arc gear;

4. The delayed circuit breaker apparatus of claim 3, wherein the support is a floating bridge structure, the support comprises two vertical support columns and a cross beam, the vertical support columns are located at two ends of the cross beam, top ends of the vertical support columns extend outwards along a direction parallel to a plane of the base plate to be respectively connected with two ends of the cross beam in a length direction, and the cross beam is suspended and located above the first gear; the beam is internally provided with a groove, the moving block is provided with a lug matched with the groove, and the lug is embedded into the groove and can move in the groove.

5. The time delay trip unit of claim 4, wherein a stop is provided at one end of the beam in the length direction, the third resilient member is a spring, and the third resilient member is connected to the stop.

6. The time delay disconnect apparatus for an electric sharpener of claim 2, wherein said transmission member comprises a transmission rod and a slider; the two axial ends of the transmission rod are respectively connected with the first gear and the sliding block; the bottom plate is provided with a sliding chute, and the sliding block is matched with the sliding chute and can move relative to the sliding chute;

7. The device as claimed in claim 6, wherein the bottom plate has a first engaging groove, the third resilient member is a resilient plate, and an end of the third resilient member away from the moving block is engaged with the first engaging groove.

8. The device of claim 6, wherein the driving rod has two ends provided with two circular rings, the first gear has a first fixing member at an eccentric position, the slider has a second fixing member, and the first and second fixing members are movably connected to the circular rings at the two ends of the driving rod in an articulated manner.

9. An electric pencil sharpener, comprising the delay cut-off device for an electric pencil sharpener as claimed in any one of claims 1-8, further comprising a ramp block, a motor and a second gear, wherein,

the inclined pressing block is arranged above the connecting rod;

10. The electric pencil sharpener of claim 9, wherein a fourth elastic member is disposed at the bottom of the connecting member for restoring the connecting member to the initial position without an external force; the bottom plate is provided with an elastic piece clamping groove, and one end of the fourth elastic piece is arranged in the elastic piece clamping groove.