Adjustable pen feeding device

Abstract

The utility model relates to an adjustable pen feeding device which comprises a self-adaptive adjusting piece, three adjusting springs and an adjusting pairing piece. Wherein the self-adaptive adjusting piece is provided with a disc-shaped main body, and the disc-shaped main body is provided with three adjusting piece circumferential openings and three adjusting piece axial shifting rods, the three adjusting piece circumferential openings are used for roughly receiving the ends of the adjusting springs, and the three adjusting piece axial shifting rods extend to the pen clamping assembly along the pen feeding center line Y. The adjusting pairing piece can be partially connected to the circumferential opening of each adjusting piece, and a plurality of containing spaces of the adjusting springs are formed by the adjusting pairing piece and the circumferential opening of each adjusting piece. Therefore, the size and the shape of the pencil clamping space can be automatically adjusted for pencils with different diameters and different appearance shapes (such as triangles, hexagons, circles and the like) so as to apply uniform and fit pencil clamping acting force, so that more reliable and stable pencil feeding is realized.

Description

Technical Field

[0001] The utility model relates to the field of pencil sharpeners, in particular to an adjustable pencil feeding device for tightly fixing a pencil in a pencil clamping gap. Background Art

[0002] As a pencil sharpening tool, the pencil sharpener is very popular among students. The pencil sharpener includes a pen feeding mechanism and a pencil sharpening mechanism. When sharpening a pencil, the pencil is passed through the pen feeding mechanism into the pencil sharpener. After the pencil is in place, it is clamped by the pen feeding mechanism, and then the pencil sharpening mechanism cuts the pencil tip.

[0003] In the prior art, a clamping wheel assembly is usually used to clamp the pen holder of a pencil, especially a three-set clamping wheel assembly. Usually, the three-set clamping wheel assembly is arranged in an equilateral triangle with the pen feed hole as the center. The pencil sharpener has uniform force and good stability during the cutting process, which can effectively reduce the phenomenon of broken pencils. At the same time, the rubber friction wheel wears less and slips normally, thereby improving the service life of the product. However, the clamping wheel assembly of this pen feed device is fixed and cannot be applied to pens of different shapes and different diameters. The pen feed device has poor versatility.

[0004] In order to solve these technical problems, Chinese invention patent CN116766814A discloses a sliding groove and an opposing groove structure in a support of three groups of clamping wheel groups, and a ball head is designed at the end of each clamping wheel group, so that the clamping wheel group can slide in the sliding groove in the support and the ball head can abut the groove in the support, thereby further clamping the clamping wheel group with the help of external force. Since the clamping wheel group can slide freely along its axis in the support, the clamping wheel group will cause instability due to movement during the pencil feeding and clamping process. Furthermore, due to the rigid connection between the clamping wheel group and the support, the clamping wheel group is also prone to damage and breakage due to rigid movement during frequent movement, thereby affecting the use of the pencil sharpener.

[0005] In order to further stably clamp the pencil, another Chinese invention patent CN116265266A discloses a more complex transmission mechanism. A special seat is designed, which has three radial guide grooves extending from the inner peripheral wall toward the outer peripheral wall and connecting the front and the back. The radial guide grooves are distributed at equal angles, and each radial guide groove is roughly T-shaped, and has a structure that is wide at the front and narrow at the back. Further, a linkage device with three front guide seats respectively slidably placed in the radial guide grooves is provided, and the three front guide seats respectively have a slider that is slidably placed in the corresponding radial guide groove and is roughly T-shaped, and then the three sliders are designed to have a front wide part, a rear narrow part, and a concave arc surface arranged on the front wide part and concave toward the axis. More specifically, two different clamping grooves are arranged on the side of the slider to receive the rotating shaft of the pen clamping device. The entire mechanism is particularly complex. In addition, considering that the pencil clamping device needs to adapt to different shapes and diameters of pencils, the scheme further provides a dedicated front fixing seat and two sets of elastic members, the two sets of elastic members are respectively installed between the dedicated fixing blocks of the support and the torsion elastic members abutting between the slider and the front fixing seat, so as to apply elastic force to the front guide seat so that the front guide seat has a tendency to move toward the axis I constantly, thereby combining with the three sets of pencil clamping wheels to reduce the gap between the pencil clamping wheel groups for pencil feeding. Although this scheme further reduces the gap between the pencil clamping wheels, its structure is complicated, and a variety of different components are respectively set, and the components are complex in structure, so that the manufacturing and processing of this scheme becomes particularly complicated, and the cost of the corresponding product is further increased. Furthermore, due to the complex structure of small parts, the device is also easy to be damaged during installation, operation and use, which brings inconvenience to use. Utility Model Content

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the instability caused by the movement of the clamping wheel assembly in the process of pencil feeding and clamping, as well as the defects of complex component structure, which complicates processing and manufacturing and increases costs, and to adjust the pencil clamping gap in a simple and feasible way, and to provide a more reliable and stable adjustable pencil feeding device.

[0007] In order to solve the above technical problems, the utility model provides an adjustable pen feeding device, which comprises a front cover, a shell and a rear cover, and also comprises a pen feeding assembly and a pen clamping assembly.

[0008] According to one aspect of the utility model, the pen feeding assembly includes an adaptive adjustment member, three adjustment springs and an adjustment partner fixedly connected to any one of the housing and the back cover, which are arranged one after another along the pen feeding center line Y. The adaptive adjustment member has a disc-shaped body, and the disc-shaped body is evenly spaced along the circumferential direction with three adjustment member circumferential openings for receiving the ends of each of the adjustment springs, and three adjustment member axial levers extending toward the pen clamping assembly along the pen feeding center line Y. The adjustment partner has a disc-shaped body that fits the shape of the adaptive adjustment member, wherein along the circumferential direction of the disc-shaped body, there are evenly spaced accommodation spaces that can be formed together with the circumferential openings of each of the adjustment members to clamp the three adjustment springs, wherein the main body of the adjustment partner is also evenly spaced with three through holes for the three adjustment member axial levers to pass through, and each of the adjustment member axial levers is rotatable in the corresponding through holes about the pen feeding center line Y. The pen clamping assembly includes three pen rubbing wheels with friction wheels, which are evenly spaced along the circumferential direction. The axial levers of each adjusting member are at least partially operatively engaged with the corresponding pen-rubbing wheels, so as to adjust the pen-feeding channel formed by the friction wheel of each pen-rubbing wheel by means of the adjusting springs clamped between the adaptive adjusting member and the adjusting counterpart.

[0009] Compared with the prior art, the pen feeding assembly in the present invention effectively defines the radial and axial relative positions of each flexible adjustment component, preferably the adjustment spring, by means of a specially designed adaptive adjustment member and an adjustment pair, especially an adjustment pair structure that can partially engage with the circumferential opening of each adjustment member, thereby providing a stable operation different from the traditional rigid mechanical movement. Furthermore, the adjustment pair structure that can partially engage with the circumferential opening of each adjustment member and the three adjustment member axial levers also provide a more simplified overall structure for the pen feeding device provided by the prior art.

[0010] Thus, by means of the adaptive rotation of the adaptive adjusting member relative to the adjusting counterpart, the major axis ends of the pen-rolling wheels of the triangularly arranged pen-rolling wheels are slightly rotated outwards about the minor axis ends of the pen-rolling wheels by means of the axial lever of the adjusting member, generally along the radial direction of the pencil, so as to form a shape-fitting pen-clamping space according to the inserted pencil and its diameter. As a result, the size and shape of the pen-clamping space can be automatically adjusted for pencils with different diameters and different external shapes (such as triangles, hexagons, circles, etc.) to apply a uniform and fitting pen-clamping force, and ensure that the center position of the clamped pencil is maintained at the rolling center line of the pencil sharpener, so that the circumferential cutting surface of the pencil after cutting is uniform and beautiful, and the pencil can be automatically fed smoothly and smoothly during cutting, and the pencil can be easily withdrawn after cutting is completed.

[0011] According to one aspect of the utility model, the number of the circumferential openings of the adjusting member is the same as the number of the axial levers of the adjusting member, and the axial levers of the adjusting member are arranged in a staggered manner relative to the circumferential openings of the adjusting member.

[0012] Preferably, the adaptive adjusting member further has a central through hole of the adjusting member, and the circumferential openings of the adjusting member are arranged at equal angles around the central through hole of the adjusting member.

[0013] Preferably, the inner wall of one side of the circumferential opening of each adjusting member is configured with a first side convexity, and a first stop wall and a second stop wall for radially limiting the ends of each adjusting spring are provided on both sides close to the first side convexity.

[0014] According to one aspect of the utility model, the adjustment partner has a central through hole for the pen feeder, and has a first limiting portion that can abut the main body of the adjustment spring along the pen feeder center line Y, and three third stop walls that can be engaged with the corresponding circumferential openings of the adjustment member.

[0015] Preferably, each third stop wall of the adjusting counterpart is a first side-convex depression facing the corresponding circumferential opening of each adjusting member to receive the other end of each adjusting spring.

[0016] According to one aspect of the utility model, the pen-rubbing wheel of the pen-clamping assembly further comprises a short axis end of a pen-rubbing wheel shaft, a long axis end of a pen-rubbing wheel shaft and a gear portion, wherein the long axis end of the pen-rubbing wheel shaft respectively abuts against the axial lever of the adaptive adjusting member.

[0017] Preferably, the pen clamp assembly further comprises a dial wheel, and the gear portions of the three pen-rubbing wheels are rotatably meshed with the tooth surface of the dial wheel.

[0018] According to one aspect of the utility model, each of the adjustment springs is a spiral spring.

[0019] In summary, the utility model overcomes the defects of the prior art mentioned above, adjusts the pen clamping gap in a simple and feasible manner, and provides a more reliable and stable adjustable pen feeding device.

[0020] For the convenience of discussion, the automatic sensing pencil sharpener described in the present application will be discussed with reference to the reference numerals indicated in the accompanying drawings. However, unless otherwise explicitly indicated, the drawings and detailed description should not be considered to limit the scope of the claims, and the utility model disclosed herein can also be implemented with various modifications or improvements as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated in and constitute a part of the specification, and illustrate embodiments consistent with the present utility model. They are merely exemplary and explanatory and do not limit the present utility model.

[0022] Figure 1 A three-dimensional exploded view of the adjustable pen feeding device according to the utility model is shown, wherein the components of the adjustable pen feeding device are specifically shown;

[0023] Figure 2 A three-dimensional view of a pen feeding assembly of an adjustable pen feeding device according to the utility model is shown;

[0024] Figure 3 A three-dimensional view of the pen feeding assembly of the adjustable pen feeding device according to the utility model is shown, especially showing the connection relationship between its components and the pen rubbing wheel;

[0025] Figure 4 A three-dimensional view of the pen feed assembly according to the present invention is shown from another angle, especially showing the engagement structure of the adaptive adjustment member and the adjustment counterpart in the pen feed assembly;

[0026] Figure 5 A three-dimensional exploded view of a pen feed assembly according to the utility model is shown;

[0027] Figure 6 A three-dimensional exploded view of the pen-rubbing wheel of the adjustable pen-feeding device according to the utility model is shown.

[0028] Reference numerals

[0029] 100 Adjustable pen feed device

[0030] 110 front cover 120 pen feed assembly 121 adaptive adjustment member 1211 adjustment member central through hole 1212 adjustment member circumferential opening 1213 first side protrusion 1214 first stop wall 1215 second stop wall 1216 adjustment member axial lever

[0031] 122 adjusting spring 123 adjusting matching piece 1231 first limiting position 1232 second limiting position

[0032] 1233 second side protrusion 1234 third stop wall 1235 through hole

[0033] 130 pen clamping assembly 131 pen rubbing wheel 1311 pen rubbing wheel shaft 13111 pen rubbing wheel shaft short shaft end 13112 pen rubbing wheel shaft long shaft end 13113 gear part 1312 friction wheel 1313 stop ring 132 dial

[0034] 140 housing 150 back cover 200 pencil DETAILED DESCRIPTION

[0035] The utility model is described below in conjunction with the accompanying drawings. It should be understood that the embodiments listed below are only used to illustrate the technical solution of the utility model, and are not intended to limit the utility model. The accompanying drawings are provided to present multiple implementations of the utility model, but the accompanying drawings do not have to be drawn according to the dimensions of the specific implementation scheme, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the utility model. Some components in the accompanying drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the accompanying drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0036] Certain directional terms used to describe the drawings below, such as "inside", "outside", "upper", "lower", "top", "bottom" and other directional terms will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0037] The terms "first", "first", "second", "secondary", and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components. The expression "substantially" allows for a reasonable range of angular deviations, but does not mean absolute consistency.

[0038] Some implementation methods of the present utility model are described in detail below in conjunction with the accompanying drawings.

[0039] See attached Figure 1 and attached Figure 2 As shown, in order to solve the above technical problems, the utility model provides an adjustable pen feeding device 100, which has a front cover 110, a shell 140 and a rear cover 150, and a pen feeding assembly 120 and a pen clamping assembly 130 arranged in the shell 140. It can be understood by those skilled in the art that the front cover 100, the shell 140 and the rear cover 150 of the adjustable pen feeding device 100 are conventional structures well known to those skilled in the art, which are not the focus of discussion of the utility model, and therefore are not described in detail herein.

[0040] The pen feeding assembly 120 includes an adaptive adjusting member 121, three adjusting springs 122, and an adjusting counterpart 123 that are arranged successively along the pen feeding center line Y. The adaptive adjusting member 121 has a disc-shaped body, and the disc-shaped body is evenly spaced along the circumferential direction and is provided with three adjusting member circumferential openings 1212 that are generally used to receive the ends of each adjusting spring 122, and three adjusting member axial levers 1216 that extend along the pen feeding center line Y toward the pen clamping assembly 130. The adjusting counterpart 123 has a disc-shaped main body which matches the shape of the adaptive adjusting part 121, wherein along the circumferential direction of the disc-shaped main body, there are evenly spaced accommodation spaces which can form together with the circumferential openings 1212 of each adjusting part for clamping the three adjusting springs 122, wherein the main body of the adjusting counterpart 123 is also evenly spaced to provide three through holes 1235 for the three adjusting part axial levers 1216, and each adjusting part axial lever 1216 is rotatable in the corresponding through holes 1235 roughly around the pen feed center line Y. The pen clamp assembly 130 includes three pen-rubbing wheels 131 with friction wheels 1312 that are evenly spaced in the circumferential direction; each adjusting member axial lever 1216 is at least partially operatively engaged with each corresponding pen-rubbing wheel 131, so as to adjust the pen-feeding channel formed by the friction wheels 1312 of each pen-rubbing wheel 131 by means of each adjusting spring 122 sandwiched between the adaptive adjusting member 121 and the adjusting counterpart 123. This will be further described below.

[0041] See Figure 1-2 , Figure 4 and Figure 5 The adaptive adjustment member 121 has a plurality of adjustment member circumferential openings 1212 evenly distributed near its outer peripheral wall and arranged at equal angles around the adjustment member central through hole 1211. In the illustrated embodiment, there are preferably three adjustment member circumferential openings 1212, and thus the three adjustment member circumferential openings 1212 are spaced 120 degrees from each other. In particular, the central axis of the adjustment member central through hole 1211 substantially coincides with the pen feed center line Y, so as to adapt to pencils of different outer peripheral sizes and shapes and, with the aid of the adjustment member central through hole 1211, various pencils can be further fed into or removed from a pencil sharpening mechanism not shown. According to Figure 3 and Figure 4As shown, the inner wall of the adjusting member circumferential opening 1212 on one side thereof is formed with a first side protrusion 1213, and a first stop wall 1214 and a second stop wall 1215 are arranged on both sides close to the first side protrusion 1213, wherein the second stop wall 1215 is formed by the outer periphery of the adaptive adjusting member 121 and the adjusting member circumferential opening 1212, thereby simplifying its structure and facilitating processing. Thus, the adjusting spring 122, which is preferably configured as a helical compression spring or a coil spring, and in this embodiment, one end of a helical compressible spring can be received by the first side protrusion 1213, and the radial position of the end is limited by the first stop wall 1214 and the second stop wall 1215.

[0042] The adaptive adjustment member 121 is also specially constructed with a plurality of adjustment member axial levers 1216 extending toward the pencil sharpening mechanism (not shown) near the outer peripheral wall of the rear disk surface of the adaptive adjustment member 121. The plurality of adjustment member axial levers 1216 are arranged at equal angles around the central through hole 1211 of the adjustment member. Corresponding to the aforementioned plurality of adjustment member circumferential openings 1212, in the illustrated embodiment, there are preferably three adjustment member axial levers 1216. The plurality of adjustment member axial levers 1216 are arranged in an interlaced manner relative to the plurality of adjustment member circumferential openings 1212 located on the disk-shaped body of the adaptive adjustment member 121 to avoid stress concentration on the front disk surface and the rear disk surface during processing. For details, see Figure 5 .

[0043] like Figure 4 and Figure 5As shown, the pen feeding assembly 120 also includes a substantially cylindrical adjustment partner 123. The adjustment partner 123 has a central through hole of the adjustment partner for feeding the pen, and further has a first limiting portion 1231 and a second limiting portion 1232, wherein the first limiting portion 1231 faces the rear disk surface of the adaptive adjustment member 121, and the second limiting portion 1232 is away from the first limiting portion 1231 and faces the unshown pencil sharpening mechanism. In particular, a third stop wall 1234, preferably three in number, extending toward the rear disk surface of the adaptive adjustment member 121 is constructed on the first limiting portion 1231 of the outer peripheral wall close to the adjustment partner 123, and the three third stop walls 1234 are arranged at equal angles around the central through hole of the adjustment partner 123 and can be engaged with the corresponding adjustment member circumferential opening 1212. More specifically, each third stop wall 1234 is recessed facing the first lateral protrusion 1213 in the aforementioned adjusting member circumferential opening 1212, and each third stop wall 1234 is substantially at the same height as the corresponding adjusting member circumferential opening 1212 along the pen-entry center line Y to form an accommodation space for the adjusting spring 122. Further, the recessed surface of each third stop wall 1234 has a second lateral protrusion 1233, and the second lateral protrusion 1233 points to the first lateral protrusion 1213 to receive the other end of the adjusting spring 122. Thus, the adjusting spring 122 is defined in its longitudinal direction by the first lateral protrusion 1213 of the adaptive adjusting member 121 and the second lateral protrusion 1233 of the adjusting counterpart 123, and is substantially defined in its radial direction by the accommodation space formed by the first stop wall 1214, the second stop wall 1215 and the third stop wall 1234.

[0044] The first limiting part 1231 of the adjustment matching member 123 is also configured with a plurality of through holes 1235 along the pen feeding center line Y, each of the through holes 1235 being away from each third stop wall 1234 and being substantially located near the first side protrusion 1213 of the corresponding adaptive adjustment member 121, so as to receive each adjustment member axial lever 1216 of the adaptive adjustment member 121 and provide a rotation space for each adjustment member axial lever 1216 to rotate substantially around the pen feeding center line Y. In view of this, the adaptive adjustment member 121 can be rotationally coupled to the adjustment matching member 123 by means of its adjustment member axial lever 1216, and the rotation of the adjustment member axial lever 1216 of the adaptive adjustment member 121 can make each third stop wall 1234 of the adjustment matching member 123 resist the outward tension of the adjustment spring 122.

[0045] See also Figure 5 The second limiting portion 1232 of the adjusting matching piece 123 provides an accommodating space for the pen clamping assembly 130 , so as to confine the pen clamping assembly 130 between the second limiting portion 1232 of the adjusting matching piece 123 and the rear cover 150 .

[0046] See also Figure 6 The pen clamp assembly 130 includes three pen rubbing wheels 131 and a dial wheel 132. Each pen rubbing wheel 131 has a pen rubbing wheel shaft 1311 integrated with a gear portion 13113, a friction wheel 1312 abutting against the gear portion 13113, and a stop ring 1313 abutting against the friction wheel 1312 to fix the friction wheel 1312. In particular, the number of pen rubbing wheels 131 is the same as the number of the aforementioned adjustment member axial levers 1216 and the number of the adjustment member circumferential openings 1212, and is also the same as the number of the adjustment springs 122. Preferably, three brush wheels 131 are provided in this embodiment, and the brush wheels 131 further have a brush wheel shaft short axis end 13111 and a brush wheel shaft long axis end 13112, wherein the brush wheel shaft short axis end 13111 of one brush wheel 131 is arranged close to the brush wheel shaft long axis end 13112 of another brush wheel 131, so that the brush wheels 131 are arranged circumferentially on the tooth surface of the dial plate 132 facing the second limiting portion 1232 of the adjustment counterpart 123, and a substantially triangular pen feeding channel is formed by the plurality of friction wheels 1312. Figure 4 A plurality of adjusting member axial levers 1216 can pass through the through holes 1235 of the adjusting counterpart 123 and abut against the long axis end 13112 of the pen wheel shaft of the pen wheel 131 to further squeeze the long axis end 13112 of the pen wheel shaft, thereby compressing the pen feed channel formed by the friction wheel 1312 of the pen wheel 131.

[0047] During operation, the rear cover 150 is tightly connected to the housing 140, and then the dial plate 132 of the pen clamping assembly 130 is symmetrically arranged on the center of the rear cover 150, and the gear parts 13113 of the multiple pen rubbing wheels 131 are rotatably engaged with the tooth surface of the dial plate 132, thereby forming a substantially triangular pen feeding channel through the three friction wheels 1312. Further, the adjustment matching member 123 of the pen feeding assembly 120 defines the accommodation space of the pen clamping assembly 130, especially the multiple pen rubbing wheels 131, through its second limiting part 1232. Furthermore, the adjusting member axial lever 1216 of the adaptive adjusting member 121 of the pen feeding assembly 120 passes through the through hole 1235 of the adjusting partner 123 and abuts against the long axis end 13112 of the pen rubbing wheel 131, thereby tightly engaging the pen feeding assembly 120 and the pen clamping assembly 130, especially the adaptive adjusting member 121 and the adjusting partner 123 of the pen feeding assembly 120, the pen rubbing wheel 131 and the dial 132 of the pen clamping assembly 130. Thus, the third stop wall 1234 of the adjusting partner 123 enters the circumferential opening 1212 of the adjusting member, and together with the first stop wall 1214 and the second stop wall 1215 of the adaptive adjusting member 121, forms a space for accommodating and squeezing the adjusting spring 122. In addition, the housing 140 and the adjusting partner 123 of the pen feeding assembly 120 are preferably fixedly connected together in a locking manner. Finally, the front cover 110 is buckled onto the pen feeding assembly 120 to form the adjustable pen feeding device 100 claimed in the present invention.

[0048] When in use, the pencil 200 is sequentially fed into the pencil sharpening mechanism (not shown) via the front cover 110, the pen feed assembly 120, the pen clamp assembly 130 and the rear cover 150. Since the housing 140 and the adjustment counterpart 123 of the pen feed assembly 120 are fixedly connected together, and the housing 140 and the rear cover 150 are tightly connected, only the adaptive adjustment member 121 of the pen feed assembly 120 is radially rotatable relative to the adjustment counterpart 123. When a thick pencil is used, the thick pencil passes through the three friction wheels 1312 to form a substantially triangular pen feeding channel, thereby radially squeezing the three friction wheels 1312 outward, so that the major axis end 13112 of the pen-rubbing wheel shaft of each pen-rubbing wheel 131 slightly rotates outward substantially along the radial direction of the pencil with respect to the minor axis end 13111 of the pen-rubbing wheel shaft. Since the major axis end 13112 of the pen-rubbing wheel shaft of each pen-rubbing wheel 131 abuts against the axial lever 1216 of the adaptive adjusting member 121, the adjusting spring 122 installed between the adaptive adjusting member 121 and the adjusting counterpart 123 applies a reaction force substantially inward along the radial direction of the pencil to the major axis end 13112 of the pen-rubbing wheel shaft through the axial lever 1216 of the adjusting member, thereby ensuring that the friction wheel 1312 is always in close contact with the pencil. When an ordinary pencil or a thin pencil is used, since the roughly triangular pen-feeding channel formed by the three friction wheels 1312 is narrow, the force applied by the adjustment spring 122 installed between the adaptive adjustment member 121 and the adjustment matching member 123 to the major axis end 13112 of the pen-rubbing wheel shaft through the axial lever 1216 of the adjustment member is roughly balanced with the force of the pencil passing through the multiple friction wheels 1312 and radially squeezing the multiple friction wheels 1312 outward, and there is no obvious relative movement between the adaptive adjustment member 121 and the adjustment matching member 123.

[0049] Thus, by means of the adaptive rotation of the adaptive adjusting member 121 relative to the adjusting counterpart 123, the major axis ends 13112 of the pen-rolling wheels 131 arranged in a triangle are slightly rotated outwards about the minor axis ends 13111 of the pen-rolling wheels 131 by means of the adjusting member axial lever 1216, generally along the radial direction of the pencil, so as to form a shape-fitting pen-clamping space according to the inserted pencil and its diameter. As a result, the size and shape of the pen-clamping space can be automatically adjusted for pencils with different diameters and different external shapes (such as triangles, hexagons, circles, etc.) to apply a uniform and fitting pen-clamping force, and ensure that the center position of the clamped pencil is maintained at the rolling center line of the pencil sharpener, so that the circumferential cutting surface of the pencil after cutting is uniform and beautiful, and the pencil can be automatically fed smoothly and smoothly during cutting, and the pencil can be easily withdrawn after cutting is completed.

[0050] Unless expressly excluded or otherwise limited, each document cited herein, including any cross-referenced or related patent or patent application and any patent application or patent to which this application claims priority or the beneficial effect thereof, is hereby incorporated by reference in its entirety. The reference to any document is not an admission that it is prior art to any disclosed or claimed invention of the present invention, or an admission that it proposes, suggests or discloses any such invention by itself or in combination with any one or more references. In addition, when any meaning or definition of a term in the present invention conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to the term in the present invention shall prevail.

[0051] Although the specific embodiments of the present invention have been illustrated and described, it is obvious to those skilled in the art that many other changes and modifications can be made without departing from the essence and scope of the present invention. Therefore, it is intended that all such changes and modifications within the scope of the present invention be included in the appended claims.

Claims

1. An adjustable pen feeding device (100), comprising a front cover (110), a housing (140) and a rear cover (150), wherein: It also includes a pen feeding assembly (120) and a pen clamping assembly (130). The pen feed assembly (120) comprises adaptive adjustment members (121) arranged successively front and back along the pen feed center line Y, three adjustment springs (122) and an adjustment matching member (123) fixedly connected to any one of the housing (140) and the rear cover (150); wherein The adaptive adjustment member (121) has a disc-shaped body, and the disc-shaped body is evenly spaced along the circumferential direction and is provided with three adjustment member circumferential openings (1212) for receiving the ends of the adjustment springs (122), and three adjustment member axial levers (1216) extending along the pen feeding center line Y toward the pen clamping assembly (130); The adjusting counterpart (123) has a disc-shaped main body that matches the shape of the adaptive adjusting member (121), wherein along the circumferential direction of the disc-shaped main body, there are evenly spaced accommodating spaces that can be formed together with the circumferential openings (1212) of each adjusting member to clamp the three adjusting springs (122), wherein the main body of the adjusting counterpart (123) is also evenly spaced with three through holes (1235) for the three adjusting member axial levers (1216) to pass through, and each adjusting member axial lever (1216) is rotatable in the corresponding through hole (1235) substantially around the pen feed center line Y; The pen clamping assembly (130) comprises three pen-rubbing wheels (131) with friction wheels (1312) which are evenly spaced in a circumferential direction; wherein each adjusting member axial lever (1216) is at least partially operatively engaged with each corresponding pen-rubbing wheel (131) so as to adjust a pen-feeding channel formed by the friction wheels (1312) of each pen-rubbing wheel (131) by means of each adjusting spring (122) clamped between the adaptive adjusting member (121) and the adjusting counterpart (123).

2. The adjustable pen feeding device (100) according to claim 1, characterized in that: The number of the adjusting member circumferential openings (1212) and the adjusting member axial shifting rods (1216) are the same, and the adjusting member axial shifting rods (1216) are arranged in a staggered manner relative to the adjusting member circumferential openings (1212).

3. The adjustable pen feeding device (100) according to claim 2, characterized in that: The adaptive adjustment member (121) further comprises an adjustment member central through hole (1211), and each of the adjustment member circumferential openings (1212) is arranged at equal angles around the adjustment member central through hole (1211).

4. The adjustable pen feeding device (100) according to claim 3, characterized in that: Each of the adjusting member circumferential openings (1212) is configured with a first side convexity (1213) on the inner wall of one side thereof, and a first stop wall (1214) and a second stop wall (1215) for radially limiting the end of each adjusting spring (122) are provided on both sides close to the first side convexity (1213).

5. The adjustable pen feeding device (100) according to claim 1, characterized in that: The adjusting counterpart (123) has a central through hole for the pen feeder, and has a first limiting portion (1231) that can abut against the main body of the adjusting spring (122) along the pen feeder center line Y, and three third stop walls (1234) that can be engaged with the corresponding adjusting component circumferential openings (1212).

6. The adjustable pen feeding device (100) according to claim 5, characterized in that: Each third stop wall (1234) of the adjusting counterpart (123) is a depression facing the first side protrusion (1213) in the corresponding circumferential opening (1212) of each adjusting member to receive the other end of each adjusting spring (122).

7. The adjustable pen feeding device (100) according to claim 1, characterized in that: The pen-rubbing wheel (131) of the pen-clamping assembly (130) further comprises a pen-rubbing wheel shaft short axis end (13111), a pen-rubbing wheel shaft long axis end (13112) and a gear portion (13113), wherein the pen-rubbing wheel shaft long axis end (13112) respectively abuts against the adjusting member axial shifting rod (1216) of the adaptive adjusting member (121).

8. The adjustable pen feeding device (100) according to claim 7, characterized in that: The pen clamp assembly (130) further comprises a dial wheel (132), and the gear parts (13113) of the three pen-rubbing wheels (131) are rotatably meshed with the toothed surfaces of the dial wheel (132).

9. The adjustable pen feeding device (100) according to claim 1, characterized in that: Each of the adjustment springs (122) is a spiral spring.

Images