CN212046623U

CN212046623U - Automatic pencil feeding mechanism for pencil sharpener

Info

Publication number: CN212046623U
Application number: CN202020528785.0U
Authority: CN
Inventors: 林靖
Original assignee: Sunwood Holding Group Co ltd
Current assignee: Sunwood Holding Group Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-12-01
Anticipated expiration: 2030-04-10

Abstract

The utility model provides an automatic pen feeding mechanism for cutting a ware belongs to and cuts a ware technical field. The automatic pen feeding mechanism solves the problems of large pen feeding resistance and unstable transmission of the existing automatic pen feeding mechanism. It includes the support, locate inboard carousel of support and two pivots that set up on the support in parallel, all be fixed with in two pivots and send a round of wheel, the opposite end of two pivots is equipped with the separation and reunion wheel that receives the carousel drive respectively, the pivot is with the corresponding pen wheel formula structure of sending as an organic whole and through injection moulding, all have the cooperation portion in two pivots, cooperation portion lateral wall is enclosed by a plurality of planes and the arc surface of connecting between two adjacent planes, two separation and reunion wheels are equipped with to embrace the elasticity outside the cooperation portion and embrace the claw, the separation and reunion wheel is to fixing between cooperation portion terminal surface and support lateral wall, still have in two pivots and lean on the portion, the portion of leaning on is located the both sides of sending a round of wheel with the cooperation portion in same pivot, it leans on with. It has the advantages of stable transmission, small resistance, convenient manufacture and the like.

Description

Automatic pencil feeding mechanism for pencil sharpener

Technical Field

The utility model belongs to the technical field of cut a ware, a ware is cut to the design, especially an automatic pencil feeding mechanism for cutting a ware.

Background

A pencil sharpener, in particular to a full-automatic pencil sharpener, is a common office stationery in office work or daily study and life. It generally includes the shell that the inside is fixed with the core, and the core includes support, penholder, planing subassembly, pivot and can control pivot pivoted motor, and the planing subassembly arranges in one side of penholder, and the penholder is fixed in the upper end of pivot, drives pivot and penholder through the motor and rotates for the planing subassembly can carry out the rotation for the penholder and plane in order to putting into the pencil in the penholder. In order to realize the convenience of operation, an automatic pencil feeding mechanism is connected to the upper end of the pencil rack, and the pencil rack rotates to drive the automatic pencil feeding mechanism to operate so as to automatically feed the pencil into the pencil rack for planing.

The Chinese patent application No. 201720604107.6 discloses a pencil advancing and retracting device of a pencil sharpener, which comprises a base, a fluted disc, two parallel rotating shafts arranged on the base, and a friction wheel and a helical gear sleeved on the rotating shafts, wherein the fluted disc is arranged on the front side of the base, the front surface of the fluted disc is provided with racks uniformly distributed in the circumference, the friction wheel is formed by combining an inner wheel formed by injection molding and a rubber wheel coated outside the inner wheel, the outer circumferential surface of one end of the helical gear is provided with helical teeth which are circumferentially and convexly meshed with the racks of the fluted disc, the end part of the other end of the helical gear is provided with a tooth surface which is abutted against the friction wheel, the rotating shafts are further sleeved with shaft sleeves abutted against the other end of the friction wheel, and the end surfaces of the shaft sleeves are provided with annular tooth surfaces abutted against the friction. However, the pencil driving and reversing device of the pencil sharpener involves multiple transmissions, such as between a fluted disc and a helical gear, between the helical gear and a rotating shaft, and between the helical gear and a friction wheel, and the transmissions are all related to each other, so that the transmission is not stable, and a fault is easy to occur due to a transmission structure at a certain position; and the multiple transmission structure means a more complicated structure, which is also not a little difficult for manufacturing.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide an automatic pen feeding mechanism for sharpening ware, solved the automatic problem that advances a resistance is big, the transmission is unstable.

The purpose of the utility model can be realized by the following technical proposal:

an automatic pencil feeding mechanism for a pencil sharpener comprises a support, a rotary disc arranged on the inner side of the support and two rotating shafts arranged on the support in parallel, wherein the lower end of the rotary disc is provided with a sleeve joint part extending out of the support, 8-shaped pencil feeding wheels are fixed on the two rotating shafts, a pencil clamping space is formed between the concave positions on the outer sides of the two pencil feeding wheels, and the opposite ends of the two rotating shafts are respectively sleeved with a clutch wheel driven by the rotary disc. The abutting part and the matching part on the same rotating shaft are positioned at two sides of the pen feeding wheel, and the end surface of the abutting part abuts against the side wall of the bracket.

The support is fixed in the pencil sharpener, and the sleeve joint part on the turntable is sleeved on a pencil rack which can rotate in the pencil sharpener so that the support and the pencil sharpener form circumferential fixation. When the pencil needs to be shaved, the pencil is inserted into a pencil clamping space formed between the concave positions on the outer sides of the two pencil feeding wheels, and then the rotation of the penholder is controlled in a manual or electric mode. The pen rack drives the turntable to rotate, so that the turntable drives the two clutch wheels to rotate. In the initial state, the elastic holding claws of the two clutch wheels are held on each plane of the outer side wall of the matching part and drive the rotating shafts to rotate under the action of friction force, and the two pencil feeding wheels fixed on the two rotating shafts synchronously rotate and automatically feed pencils into the penholder under the action of friction force. When the penholder rotates, the planing component in the pencil sharpener is driven to operate, and when a pencil is fed into the penholder and is in contact with the planing component, the planing component can plane the pencil. At this moment, the planing component can generate resistance to the movement of the pencil, the clamping claw slips between the clamping claw and the matching part under the action of the resistance through self elastic force, and the slipping between the clamping claw and the matching part is smoother through the arc surfaces on the outer side of the matching part, so that the pencil is kept still. When the contact part of the pencil and the planing component is planed, the planing component does not generate resistance to the pencil any more, the holding claw is combined with the matching part again to enable the rotating shaft to rotate, and the pencil is further sent into the penholder. In the planing process, the holding claw is continuously combined with or separated from the matching part until the end part of the pencil is planed.

This automatic advance a mechanism embraces the cooperation of claw and cooperation portion through two for the pencil can be in order to advance a pen, dig, advance a pen, the mode of digging accomplishes the complete planing of pencil tip, makes the pencil automatically send into the in-process with the help of such mode and can not receive the influence of planing the subassembly, has reduced the resistance of automatically advancing a pen, makes the transmission more steady, life is longer. In addition, the clutch wheel is directly matched with the rotating shaft and does not act on the pen feeding wheel any more, so that the pen feeding wheel and the rotating shaft can be set into an integrated structure and directly formed by adopting an injection molding mode, the processing difficulty is greatly reduced, the manufacturing is more convenient, and the cost is lower.

In foretell an automatic mechanism of advancing for sharpening ware, elasticity embrace the claw and include the sand grip that a plurality of quantity and plane are the same, the sand grip extends along the axial of pivot and each sand grip along circumference equipartition in the cooperation portion outside, each sand grip inside wall all has the lug that contacts with cooperation portion lateral wall.

The strip-shaped structure enables the elastic holding claw to better slip by means of elasticity when the pencil is cut, so that the resistance when the pencil is automatically fed is reduced, and stable transmission is ensured.

In the automatic pencil feeding mechanism for the pencil sharpener, the clutch wheel is made of plastic, and the clutch wheel and the holding claw are of an integrated structure and are formed by injection molding.

The integrated structure enables the connection strength between the clutch wheel and the holding claw to be higher, and the combination or separation between the clutch wheel and the rotating shaft to be more reliable. And moreover, the injection molding is adopted, so that the manufacturing is more convenient.

In foretell an automatic mechanism of advancing for cutting a ware, sand grip root position have the bodiness portion that links firmly mutually with the clutch wheel, the bodiness portion lateral wall is the inclined plane, be the circular arc transition between the lateral wall of bodiness portion and the sand grip lug place of keeping away from.

What the dependence of skidding of embracing claw and cooperation portion is that each sand grip outwards struts, consequently sets up thickening portion at the sand grip root, can strengthen the joint strength between sand grip and the clutch pulley like this, appears tired soft and lead to the sand grip to unable reseing after avoiding long-time the use. In addition, the outer side wall of the thickened part and the side wall of the raised line back to the convex block are in arc transition, so that the stress concentration at the position can be improved, and the fracture difficulty at the position can be improved.

In the automatic pencil feeding mechanism for the pencil sharpener, the pencil feeding wheel is coated with the soft rubber wheel sleeve attached to the outer side wall of the pencil feeding wheel.

Compared with plastic, the soft rubber wheel sleeve can generate larger friction force when being in contact with a pencil, so that the automatic pencil feeding process is more stable.

In the automatic pencil feeding mechanism for the pencil sharpener, the pencil feeding wheel comprises a body with two planar end faces and a circular boss protruding out of the center of the two end faces of the body, annular blocking shoulders are arranged on the inner sides of the two ends of the soft rubber wheel sleeve, and the annular blocking shoulders are embedded in a space between the circular boss and the end face of the body.

The concrete accessible rubber coating mode shaping of flexible glue wheel cover is outside sending a wheel, will send a wheel to set up to body and protrusion in the circular boss of body both ends face center department, has the annular on the flexible glue wheel cover after the shaping and keeps off the shoulder, and the annular keeps off the shoulder and inlays in the space between circular boss and the body terminal surface, can increase flexible glue wheel cover like this and send the effective connection area between the wheel.

In the automatic pencil feeding mechanism for the pencil sharpener, the concave positions outside the two pencil feeding wheels are arranged in a staggered manner.

In the automatic pencil feeding mechanism for the pencil sharpener, the turntable is uniformly provided with a plurality of first teeth along the circumferential direction, and the peripheral walls of the two clutch wheels are uniformly provided with a plurality of second teeth meshed with the first teeth along the circumferential direction.

Compared with the prior art, this an automatic mechanism of advancing for cutting ware has following advantage:

1. the pencil can be completely planed in the pencil end part in the modes of pencil feeding, planing, pencil feeding and planing through the matching of the two holding claws and the matching part, so that the pencil can be automatically fed without being influenced by the planing assembly, the resistance of automatic pencil feeding is reduced, the transmission is more stable, and the service life is longer;

2. the clutch wheel is directly matched with the rotating shaft and does not act on the pen feeding wheel any more, so that the pen feeding wheel and the rotating shaft can be set into an integrated structure and are directly molded by adopting an injection molding mode, the processing difficulty is greatly reduced, the manufacturing is more convenient, and the cost is lower.

Drawings

FIG. 1 is a schematic view of the present automatic pencil feeding mechanism for a pencil sharpener.

FIG. 2 is a longitudinal cross-sectional view of the present automatic pencil feeding mechanism for a sharpener.

Fig. 3 is a transverse cross-sectional view of the present automatic pencil feeding mechanism for a sharpener.

Fig. 4 is a schematic view of the rotation shaft of the automatic pencil feeding mechanism for the pencil sharpener.

FIG. 5 is a schematic view of the clutch wheel of the automatic pencil propelling mechanism for the pencil sharpener.

In the figure, 1, a bracket; 1a, a support plate; 1a1, mounting lugs; 1b, a branch I; 1c, branch II; 2. a turntable; 2a, a sleeve joint part; 2a1, square socket holes; 2b, a first tooth; 2c, a round hole; 3. a rotating shaft; 3a, a matching part; 3a1, plane; 3a2, arc surface; 3b, an abutting part; 4. a pen feeding wheel; 4a, a body; 4b, a circular boss; 5. a clutch wheel; 5a, elastically holding the claw; 5a1, convex strips; 5a2, bumps; 5a3, thickening; 5a31, inclined plane; 5b, a second tooth; 6. a soft rubber wheel sleeve; 6a and an annular retaining shoulder.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-3, the automatic pencil feeding mechanism for a pencil sharpener comprises a support 1 and two rotating shafts 3 arranged in parallel on the support 1, wherein the support 1 comprises a support plate 1a, a first support bar 1b fixedly connected to two ends of the left side of the support plate 1a and a second support bar 1c fixedly connected to two ends of the right side of the support plate 1a, the first support bar 1b and the second support bar 1c are arranged mutually, and two ends of the two rotating shafts 3 are respectively inserted into the upper ends of the first support bar 1b and the second support bar 1 c. The outer side of the support plate 1a is provided with a pair of installation lugs 1a1, the support plate 1a is provided with a turntable 2, the center of the turntable 2 is provided with a round hole 2c, the lower end face of the turntable 2 is provided with a sleeving part 2a penetrating out of the support plate 1a, the sleeving part 2a is provided with a square sleeving hole 2a1, and the square sleeving hole 2a1 and the round hole 2c are arranged on the same central line and are communicated with each other.

As shown in fig. 3 and 4, 8-shaped pen feeding wheels 4 are fixed on the two rotating shafts 3, and the rotating shafts 3 and the corresponding pen feeding wheels 4 are of an integrated structure and are formed by injection molding. A pen clamping space is formed between the concave positions on the outer sides of the two pen feeding wheels 4, the round hole 2c in the center of the rotary disc 2 is located right below the pen clamping space, and the concave positions on the outer sides of the two pen feeding wheels 4 are arranged in a staggered mode in the embodiment. The pen feeding wheel 4 is externally coated with a soft rubber wheel sleeve 6 attached to the outer side wall of the pen feeding wheel 4, wherein the pen feeding wheel 4 specifically comprises a body 4a with two ends being planes 3a1 and a circular boss 4b protruding out of the center of two end faces of the body 4a, the inner sides of two ends of the soft rubber wheel sleeve 6 are provided with annular blocking shoulders 6a, and the annular blocking shoulders 6a are embedded in a space between the circular boss 4b and the end face of the body 4 a.

As shown in fig. 1-3, the opposite ends of the two rotating shafts 3 are respectively sleeved with a clutch wheel 5 driven by the rotating disc 2, the rotating disc 2 is uniformly provided with a plurality of teeth one 2b along the circumferential direction, and the peripheral walls of the two clutch wheels 5 are uniformly provided with a plurality of teeth two 5b meshed with the teeth one 2b along the circumferential direction, so that when the rotating disc 2 rotates, the two clutch wheels 5 can be driven to rotate by the meshing of the teeth one 2b and the teeth two 5b, and the teeth one 2b and the teeth two 5b can be specifically helical teeth or straight teeth. The two rotating shafts 3 are respectively provided with a matching part 3a, the outer side wall of each matching part 3a is surrounded by a plurality of planes 3a1 and an arc surface 3a2 connected between two adjacent planes 3a1, the surfaces of the two clutch wheels 5 opposite to the pen feeding wheel 4 on the same rotating shaft 3 are provided with elastic holding claws 5a held outside the matching parts 3a, two end surfaces of one clutch wheel 5 are respectively abutted against the end surface of the matching part 3a and the first support strip 1b, and two end surfaces of the other clutch wheel 5 are respectively abutted against the end surface of the matching part 3a and the second support strip 1 c. The two rotating shafts 3 are also provided with abutting parts 3b, the abutting parts 3b and the matching parts 3a on the same rotating shaft 3 are positioned at two sides of the pen feeding wheel 4, the end surface of one abutting part 3b abuts against the second supporting strip 1c, and the end surface of the other abutting part 3b abuts against the first supporting strip 1 b.

As shown in fig. 5, further, the number of the flat surfaces 3a1 is four, the elastic clasping claw 5a includes a plurality of convex strips 5a1 having the same number as the flat surface 3a1, the convex strips 5a1 extend along the axial direction of the rotating shaft 3, each convex strip 5a1 is uniformly distributed on the outer side of the matching portion 3a along the circumferential direction, and the inner side wall of the end portion of each convex strip 5a1 has a convex block 5a2 contacting with the outer side wall of the matching portion 3 a. The clutch wheel 5 is made of plastic, and the clutch wheel 5 and the elastic holding claw 5a are of an integrated structure. The root position of the convex strip 5a1 is provided with a thickened part 5a3 fixedly connected with the clutch wheel 5, the outer side wall of the thickened part 5a3 is an inclined surface 5a31, and the outer side wall of the thickened part 5a3 and the side wall of the convex strip 5a1 back to the convex block 5a2 form an arc transition.

The automatic pencil feeding mechanism is applied to a pencil sharpener, the support 1 is fixed in the pencil sharpener in a mode that a fastener penetrates through a pair of installation lugs 1a1, and the sleeving part 2a on the turntable 2 is sleeved on a pencil holder in the pencil sharpener through the square sleeving hole 2a1 to form circumferential fixation. The penholder can rotate in the pencil sharpener, the planing assembly is arranged on one side of the penholder, and the planing assembly can rotate to plane a pencil fed into the penholder when the penholder rotates.

When the pencil needs to be shaved, the pencil is cut and inserted into a pencil clamping space formed between the concave positions at the outer sides of the two pencil feeding wheels 4, and then the rotation of the penholder is controlled in a manual or electric mode (the hand-operated pencil sharpener manually shakes the crank to realize the rotation of the penholder, and the electric pencil sharpener automatically rotates the penholder by driving the penholder through an internal motor). The penholder drives the turntable 2 to rotate, so that the turntable 2 drives the two clutch wheels 5 to rotate. In the initial state, the elastic holding claws 5a of the two clutch wheels 5 are held on the planes 3a1 on the outer side wall of the matching part 3a and drive the rotating shaft 3 to rotate under the action of friction force, and the two pencil feeding wheels 4 fixed on the two rotating shafts 3 synchronously rotate and automatically feed the pencil into the penholder under the action of friction force.

When the penholder rotates, the planing component in the pencil sharpener is driven to operate, and when a pencil is fed into the penholder and is in contact with the planing component, the planing component can plane the pencil. At this time, the shaving assembly generates resistance to the movement of the pencil, the elastic holding claw 5a slips with the engaging portion 3a due to the elastic force of the elastic holding claw, and the arc surfaces 3a2 outside the engaging portion 3a make the slip between the elastic holding claw 5a and the engaging portion 3a smoother, so that the pencil is kept still. When the contact part of the pencil and the planing component is planed, the planing component does not generate resistance to the pencil any more, the elastic holding claw 5a is combined with the matching part 3a again to enable the rotating shaft 3 to rotate, and the pencil is further fed into the penholder. During the planing process, the elastic holding claw 5a is continuously combined with or separated from the matching part 3a until the end part of the pencil is planed.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An automatic pencil feeding mechanism for a pencil sharpener comprises a support (1), a rotary disc (2) arranged on the inner side of the support (1) and two rotary shafts (3) arranged on the support (1) in parallel, wherein the lower end of the rotary disc (2) is provided with a sleeving part (2a) extending out of the support (1), the two rotary shafts (3) are respectively fixed with 8-shaped pencil feeding wheels (4), a pencil clamping space is formed between concave positions on the outer sides of the two pencil feeding wheels (4), and the opposite ends of the two rotary shafts (3) are respectively sleeved with clutch wheels (5) driven by the rotary disc (2), and the automatic pencil feeding mechanism is characterized in that the rotary shafts (3) and the corresponding pencil feeding wheels (4) are of an integrated structure and are formed by injection molding, the two rotary shafts (3) are respectively provided with a matching part (3a), the outer side walls of the matching parts (3a) are formed by a plurality of planes (3a1) and arc surfaces (3a2) connected between the two adjacent planes (3a1), the face that send pen wheel (4) to on two separation and reunion wheels (5) and same pivot (3) is equipped with and embraces elasticity armful claw (5a) outside cooperation portion (3a), separation and reunion wheel (5) axial fixity is between cooperation portion (3a) terminal surface and support (1) lateral wall, still has on two pivots (3) and leans on portion (3b), the both sides that send pen wheel (4) are located with cooperation portion (3a) to the portion (3b) that leans on same pivot (3), lean on portion (3b) terminal surface and support (1) lateral wall to lean on.

2. The automatic pencil feeding mechanism for the pencil sharpener as claimed in claim 1, wherein the elastic embracing claw (5a) comprises a plurality of ribs (5a1) having the same number as the plane (3a1), the ribs (5a1) extend in the axial direction of the rotating shaft (3) and the ribs (5a1) are circumferentially and uniformly distributed outside the mating portion (3a), and the inner side wall of each rib (5a1) is provided with a projection (5a2) contacting with the outer side wall of the mating portion (3 a).

3. The automatic pencil feeding mechanism for the pencil sharpener as claimed in claim 2, wherein the clutch wheel (5) is made of plastic, and the clutch wheel (5) and the holding claw are of an integral structure and are formed by injection molding.

4. The automatic pencil feeding mechanism for the pencil sharpener as claimed in claim 3, wherein the root of the protruding strip (5a1) has a thickened portion (5a3) fixed to the clutch wheel (5), the outer side wall of the thickened portion (5a3) is an inclined surface (5a31), and the outer side wall of the thickened portion (5a3) and the side wall of the protruding strip (5a1) facing away from the bump (5a2) form an arc transition.

5. The automatic pencil feeding mechanism for the pencil sharpener according to claim 1, 2, 3 or 4, wherein the pencil feeding wheel (4) is externally coated with a soft rubber wheel sleeve (6) attached to the outer side wall of the pencil feeding wheel (4).

6. The automatic pencil feeding mechanism for the pencil sharpener as claimed in claim 5, wherein the pencil feeding wheel (4) comprises a body (4a) with two end faces being planes (3a1) and circular bosses (4b) protruding out of the centers of the two end faces of the body (4a), annular retaining shoulders (6a) are arranged on the inner sides of the two ends of the soft rubber wheel sleeve (6), and the annular retaining shoulders (6a) are embedded in a space between the circular bosses (4b) and the end faces of the body (4 a).

7. The automatic pencil feeding mechanism for a pencil sharpener according to claim 6, wherein the concave positions of the outer sides of the two pencil feed wheels (4) are staggered.

8. The automatic pencil feeding mechanism for the pencil sharpener according to claim 1, wherein a plurality of first teeth (2b) are uniformly arranged on the turntable (2) along the circumferential direction, and a plurality of second teeth (5b) meshed with the first teeth (2b) are uniformly arranged on the outer circumferential walls of the two clutch wheels (5) along the circumferential direction.