Three-jaw pencil feeder

Abstract

The utility model provides a three-jaw pencil feeder which comprises a power gear, a synchronous disc, a base plate, a rotating support, a transmission shaft, a pencil clamping device, a torsion spring and a dustproof cover, the base plate, the synchronous disc and the power gear are provided with center holes for a pencil holder to pass through, and the synchronous disc, the rotating support and the transmission shaft are installed on the base plate; the number of the pen clamping devices is three, each pen clamping device comprises a pen clamping wheel, a positioning wheel, a bevel gear and a rotating shaft, the pen clamping wheels, the positioning wheels and the bevel gears are sequentially arranged on the rotating shafts in a sleeving mode, the rotating shafts are arranged on the rotating support in a sleeving mode, the transmission shaft is provided with a screw in meshing transmission with the bevel gears and a gear in meshing transmission with the power gear, and the number of the torsion springs is three. One end of the torsion spring is connected to the rotating support, and the other end is connected to the chassis. Guide grooves II which are uniformly distributed are formed in the synchronous disc, a pencil holder is uniformly stressed during pencil feeding through triangular positioning, the center of the pencil holder is stable, and pencil leads are not easy to break; the three torsional springs are arranged, acting force is dispersed, the elastic force interval is larger, and the adaptability is better; and due to the pre-opened three-jaw design, a large-size pen can be inserted more easily.

Description

Technical Field

[0001] The utility model relates to the field of stationery, in particular to an automatic pen feeder of a pencil sharpener, in particular to a three-claw pen feeder. Background Art

[0002] Most existing pencil feeders use a two-claw structure, and the elastic force is generated on the bracket of the pencil feeder. When sharpening a triangular pencil, the uneven force easily leads to center deviation and lead breakage. Due to the limitation of its structure, it is almost impossible to sharpen large-sized pencils, and its adaptability is poor. Utility Model Content

[0003] In view of the defects of the existing pen feeders, the technical problem to be solved by the utility model is to provide a three-claw pen feeder with a stable center, not easy to break the core, better adaptability and easier pen insertion.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, the utility model is realized by the following technical measures: a three-claw pen feeder, including a power gear, a synchronization disk, a chassis, a rotating bracket, a transmission shaft, a pen clamping device, a torsion spring, and a dust cover, the chassis, the synchronization disk, and the power gear are provided with a center hole for the pen rod to pass through, and the synchronization disk, the rotating bracket, and the transmission shaft are installed on the chassis; there are three pen clamping devices, and the pen clamping device includes a pen clamping wheel, a positioning wheel, a bevel gear, and a rotating shaft, and the pen clamping wheel, the positioning wheel, and the bevel gear are sequentially sleeved on the rotating shaft, and the rotating shaft is sleeved on the rotating bracket, and the transmission shaft is provided with a screw that meshes with the bevel gear and a gear that meshes with the power gear. There are three torsion springs, one end of which is connected to the rotating bracket, and the other end is connected to the chassis.

[0005] Furthermore, the chassis is provided with a plurality of axial positioning holes, guide grooves I, and limit grooves, and the bottom is provided with a plurality of positioning columns and clamping feet. The synchronous disk is provided with a plurality of guide grooves II, and the outer ring of the synchronous disk is provided with a clamping groove. The guide groove II corresponds to the guide groove I, and the guide grooves I and II are evenly distributed around the center hole. The clamping feet are clamped into the clamping grooves to realize the connection between the chassis and the synchronous disk, and the dust cover is provided with a plurality of axial positioning holes.

[0006] Furthermore, the rotating bracket is installed in the limiting groove of the chassis, a positioning column II is provided at the bottom of the rotating bracket, the positioning column II is installed in the guide groove I and the guide groove II, and the transmission shaft is installed in the axial positioning hole of the chassis and the dust cover.

[0007] Furthermore, the rotating bracket is provided with two transverse positioning holes I and two longitudinal positioning holes II, the rotating shaft is fixed in the positioning hole I, and the transmission shaft is fixed in the positioning hole II.

[0008] Furthermore, the middle section of the torsion spring is sleeved on the positioning column at the bottom of the chassis, one end of the torsion spring is sleeved on the positioning column II at the bottom of the rotating bracket, and the other end of the torsion spring is pressed against the bottom of the chassis.

[0009] Furthermore, a pre-opened inclined surface is provided on the top of the rotating bracket.

[0010] Compared with the prior art, the advantages of the utility model are: this is a three-claw pen feeder, the synchronization disk is provided with evenly distributed guide grooves II, the triangular positioning makes the pen holder evenly stressed when feeding the pen, the center is stable, and the pen core is not easy to break; 3 torsion springs are provided to disperse the force, the elastic force range is larger, and the adaptability is better; the pre-opened three-claw design makes it easier to insert large-size pens. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0012] Figure 1 This is a schematic diagram of the overall structure of the three-claw pen feeder described in the utility model;

[0013] Figure 2 It is a schematic diagram of the exploded structure of the three-claw pen feeder described in the utility model;

[0014] Figure 3 It is a structural schematic diagram of the chassis described in the utility model.

[0015] Explanation of the reference numerals in the accompanying drawings: 1. power gear; 2. synchronization disk; 3. chassis; 4. rotating bracket; 5. transmission shaft; 6. torsion spring; 7. pen clamp wheel; 8. positioning wheel; 9. bevel gear; 10. rotating shaft; 11. center hole; 12. screw rod; 13. gear; 14. axial positioning hole; 15. guide groove I; 16. limit groove; 17. positioning column; 18. clamping foot; 19. guide groove II; 20. clamping groove; 21. positioning column II; 22. positioning hole I; 23. positioning hole II; 24. pre-supported inclined surface; 25. dust cover. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0017] In the description of the present utility innovation, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "bottom", "top", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility innovation and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility innovation.

[0018] Please refer to Figure 1-Figure 3 The three-claw pen feeder provided in this embodiment includes a power gear 1, a synchronous disk 2, a chassis 3, a rotating bracket 4, a transmission shaft 5, a pen clamping device, a torsion spring 6, and a dust cover 25. The chassis 3, the synchronous disk 2, and the power gear 1 are provided with a center hole 11 for the pen rod to pass through, the chassis 3 is provided with a plurality of axis positioning holes 14, a guide groove I 15, and a limit groove 16, the bottom of the chassis 3 is provided with a plurality of positioning columns 17 and a clamping foot 18, the synchronous disk 2 is provided with a plurality of guide grooves II 19, the outer ring of the synchronous disk 2 is provided with a clamping groove 20, and the guide groove II 19 corresponds to the guide groove Ⅰ15, the guide groove Ⅰ15 and the guide groove Ⅱ19 are evenly distributed around the center hole 11, the clamping foot 18 is clamped into the clamping groove 20 to realize the connection between the chassis 3 and the synchronous disk 2, and a plurality of axis positioning holes 14 are provided on the dust cover 25. The power gear 1 passes through the center holes 11 of the chassis 3 and the synchronous disk 2 and then meshes with the gear 13 on the transmission shaft 5 for transmission; there are three pen clamping devices, which are evenly distributed and installed on the chassis 3. The pen clamping device includes a pen clamping wheel 7, a positioning wheel 8, a bevel gear 9, a rotating shaft 10, and a rotating bracket. 4 is provided with two transverse positioning holes I 22 and two longitudinal positioning holes II 23, the bottom of the rotating bracket 4 is provided with a positioning column II 21, and the top is provided with a pre-supported inclined surface 24, the rotating bracket 4 is installed in the limit groove 16 of the chassis 3, the positioning column II 21 is installed in the guide groove I 15 and the guide groove II 19, the transmission shaft 5 is fixed in the positioning hole II 23 of the rotating bracket 4, and the lower end is installed in the axial positioning hole 14 of the chassis 3 and the dust cover 25, and the rotating bracket 4 can rotate slightly with the axial positioning hole 14 as the center of the circle. The transmission shaft 5 is provided with a gear 13 and a screw 12, the gear 13 is meshed with the power gear 1 for transmission, the screw 12 is meshed with the bevel gear 9 for transmission, the pen clamp wheel 7, the positioning wheel 8, and the bevel gear 9 are all provided with through holes and are sequentially sleeved on the rotating shaft 10, and the rotating shaft 10 is fixed in the positioning hole Ⅰ22 of the rotating bracket 4; one end of the torsion spring 6 is provided with a circle and sleeved on the positioning column Ⅱ21 at the bottom of the rotating bracket 4, and the other end is pressed against the bottom of the chassis 3, and the middle section of the torsion spring 6 is also provided with a circle and sleeved on the positioning column 17 at the bottom of the chassis 3.

[0019] The three-claw pen feeder provided in the present embodiment, when the pencil sharpener is working, after the pen is inserted into the middle of the three pen clamping wheels 7, the pen clamping wheels 7 will be squeezed outwards, at which time the pen clamping wheels 7 push the rotating bracket 4 through the rotating shaft 10, and since the rotating bracket 4 is connected to the chassis 3 and the axial positioning hole 14 of the dust cover 25 by the transmission shaft 5, the rotating bracket 4 will rotate outwards with the axial positioning hole 14 as the center of the circle, at which time the positioning column II 21 at the bottom of the rotating bracket 4 moves in the guide groove of the chassis 3 and drives the torsion spring 6 to deform, and the elastic force generated by the deformation of the torsion spring 6 acts on the pen clamping wheel 7 through the transmission of the rotating bracket 4 and the rotating shaft 10, so that the pen entered can be clamped, and then the power of the rotating blade part drives the power gear 1 to rotate, thereby driving the transmission shaft 5 to rotate, the screw 12 of the transmission shaft 5 drives the bevel gear 9 to rotate, and the bevel gear 9 drives the pen clamping wheel 7 to rotate through the rotating shaft 10, and the rotation of the pen clamping wheel 7 drives the pen into the pencil sharpener for sharpening; since the positioning column II 21 is also connected to the synchronous disk 2. When the positioning column II 21 moves, it will drive the synchronous disk 2, and the several guide grooves II 19 on the synchronous disk 2 are evenly distributed around the center hole 11, and the center is stable, which will drive the positioning column II 21 to adapt and move to the stable center position. The triangular positioning makes the pen rod evenly stressed during the pen feeding process, stable and not offset, reducing the risk of pen breakage; 3 torsion springs 6 are provided to disperse the force, the elastic force range is larger, and the adaptability is better; when an ordinary pen feeder is used with a relatively large-sized pen, since there is no rotating bracket, the pen feeding wheel is fixed on the frame and opens outward by the deformation of the frame, and its reaction force is greater, and the pen clamping wheel 7 is difficult to feed the pen. The three-claw pen feeder provided in this embodiment will push the pre-opened inclined surface 24 on the top of the rotating bracket 4 when a large-sized pen is inserted, so that before manually pushing a part of the pen to push the pen clamping wheel 7, the rotating bracket 4 will be pushed to rotate, and then a part of the pen clamping wheel 7 will be pushed open. At this time, it will be easier to manually insert the pen and open the pen clamping wheel 7, making the entire pen insertion process easier.

[0020] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Three-claw pen feeder, including: A power gear, a chassis, a transmission shaft, a pen clamping device, and a dust cover are characterized in that: they also include a synchronization disk, a rotating bracket, and a torsion spring. The chassis, the synchronization disk, and the power gear are provided with a center hole for the pen holder to pass through. The synchronization disk, the rotating bracket, and the transmission shaft are installed on the chassis; there are three pen clamping devices, and the pen clamping device includes a pen clamping wheel, a positioning wheel, a bevel gear, and a rotating shaft. The pen clamping wheel, the positioning wheel, and the bevel gear are sequentially sleeved on the rotating shaft, and the rotating shaft is sleeved on the rotating bracket. The transmission shaft is provided with a screw that meshes with the bevel gear and a gear that meshes with the power gear. There are three torsion springs, one end of which is connected to the rotating bracket, and the other end is connected to the chassis.

2. The three-claw pen feeder according to claim 1, characterized in that: The chassis is provided with a plurality of axial positioning holes, guide grooves I, and limit grooves, and the bottom is provided with a plurality of positioning columns and clamping feet. The synchronous disk is provided with a plurality of guide grooves II, and the outer ring of the synchronous disk is provided with a clamping groove, the guide groove II corresponds to the guide groove I, and the guide grooves I and II are evenly distributed around the center hole. The clamping feet are clamped into the clamping grooves to realize the connection between the chassis and the synchronous disk, and the dust cover is provided with a plurality of axial positioning holes.

3. The three-claw pen feeder according to claim 2, characterized in that: The rotating bracket is installed in the limiting groove of the chassis, a positioning column II is provided at the bottom of the rotating bracket, the positioning column II is installed in the guide groove I and the guide groove II, and the transmission shaft is installed in the axial positioning hole of the chassis and the dust cover.

4. The three-claw pen feeder according to claim 1, characterized in that: The rotating bracket is provided with two transverse positioning holes I and two longitudinal positioning holes II, the rotating shaft is fixed in the positioning hole I, and the transmission shaft is fixed in the positioning hole II.

5. The three-claw pen feeder according to claim 2, characterized in that: The middle section of the torsion spring is sleeved on the positioning column at the bottom of the chassis, one end of the torsion spring is sleeved on the positioning column II at the bottom of the rotating bracket, and the other end of the torsion spring is pressed against the bottom of the chassis.

6. The three-claw pen feeder according to claim 1, characterized in that: A pre-opened inclined surface is arranged on the top of the rotating bracket.

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