Stable pencil feeding and sharpening machine

Abstract

The utility model provides a stable pencil feeding pencil sharpener, including, shell, motor, pencil feeding mechanism and pencil sharpening mechanism, motor, pencil feeding mechanism and pencil sharpening mechanism are accommodated in the shell, pencil feeding mechanism includes turntable piece, support piece and at least two pencil feeding unit piece, the pencil feeding unit piece is accommodated between turntable piece and support piece, in the pencil sharpening process, the pencil feeding unit piece is connected with the pencil sharpening mechanism. The pen feeding unit pieces can move relatively.

Description

Technical Field

[0001] The utility model relates to the field of stationery parts, in particular to a stable pencil feeding and pencil sharpening machine. Background Art

[0002] The pencil sharpener is an indispensable stationery for office workers and students. The pencil sharpener mainly consists of a pen-advancing and retracting mechanism and a cutting mechanism. The pencil passes through the pen-advancing and retracting mechanism and enters the pencil sharpener. When the pencil cutting surface reaches the cutting mechanism, it is clamped by the clamping wheel, and then the pencil sharpener cuts the pencil cutting surface. After the pencil is sharpened, the pen-advancing and retracting mechanism can also remove the pencil from the pencil sharpener.

[0003] At present, the appearance of pencils has various variants as the demand changes. The traditional pencil sharpener can no longer meet the cutting of diversified pencils. In order to cope with this situation, a pencil sharpener advance and retreat mechanism that can adapt to pencils with different profiles has appeared. The use of such pencil sharpeners is becoming more and more common, and the worm-worm gear assembly is widely used as a transmission mechanism in the existing advance and retreat mechanism due to its large transmission ratio. In order to save volume, the existing worm-worm gear assembly can usually be used not only as a transmission mechanism, but also as an advance and retreat clutch mechanism. The meshing distance of the worm and worm gear in this way adopts a non-fixed elastic structure, that is, a spring is pressed on the worm. When the pen feeding speed and the pencil sharpening speed are not synchronized, the worm is disengaged from the worm gear meshing position to complete the synchronous action in a slipping manner. This method is very easy to damage the gear during the continuous disengagement and meshing process of the worm, affecting the service life, the power transmission is not stable, and it is also easy to generate a large noise, which affects the use of consumers. Another method is to fix the position of the worm shaft, and the shaft end of the worm wheel near the worm meshing position is connected in a rotation manner perpendicular to the worm wheel rotation axis and deviated from the position of the worm shaft core line. In this method, when the pencil clamping wheel connected to the other end of the same axis as the worm wheel rotation axis rotates around the other end rotation axis when clamping and releasing the pencil, the meshing depth of the worm and the worm wheel will also change, which can easily cause gear damage and unstable power transmission, seriously affecting the service life of the worm and worm wheel. Utility Model Content

[0004] The utility model aims to provide a pencil sharpener with stable pen feeding, so as to solve the problems of the existing pencil sharpeners, such as large size, unstable pen feeding, easy noise, easy damage to gear components and short service life.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A stable pen feeding and pencil sharpening machine comprises a shell, a motor, a pen feeding mechanism and a pen sharpening mechanism, wherein the motor, the pen feeding mechanism and the pen sharpening mechanism are accommodated in the shell, the pen feeding mechanism comprises a turntable, a support and at least two pen feeding unit components, the pen feeding unit components are accommodated between the turntable and the support, a pen feeding hole is formed between the pen feeding unit components, and the size of the pen feeding hole can change during the pen sharpening process, wherein the pen feeding unit components comprise: a bracket, a worm component, a worm wheel component, a clamping wheel and a wheel axle, the bracket is a cavity structure, at least a part of the wheel axle can be rotatably assembled in the bracket, the worm wheel component and the clamping wheel are both sleeved on the wheel axle, the central axes of the worm component and the worm wheel component are perpendicular to each other and the distance between the central axes is fixed, the worm wheel component also comprises a differential slipping component, the worm wheel component and the differential slipping component can rotate synchronously, and when the pen sharpening speed is different from the pen feeding speed, the differential slipping component can slip with the wheel axle.

[0007] Furthermore, the number of pen feeding units is 3, which are evenly arranged along the circumferential direction.

[0008] Furthermore, the bracket comprises a first cavity and a second cavity, the first cavity can be adapted to accommodate the worm member, and the second cavity can be adapted to accommodate the worm wheel member.

[0009] Furthermore, the differential slipping member is made of soft elastic material.

[0010] Furthermore, the differential slip member is sleeved between the worm gear member and the wheel axle.

[0011] Furthermore, the differential slipping member and the worm gear member are sleeved adjacent to each other on the wheel axle.

[0012] Furthermore, the outer surface of the worm gear is a helical gear.

[0013] Furthermore, the clamping wheel is made of soft elastic material.

[0014] The utility model provides a stable pencil feeding and sharpening machine, and its beneficial effect compared with the prior art is that the structure mainly includes components such as a worm, a worm wheel, and a differential sliding member. Among them, the shafts of the worm and the worm wheel are assembled on the bracket in a cross-shaped manner with a fixed meshing depth, and the differential sliding member is directly coupled with the worm wheel. The worm, the worm wheel and the clamping wheel are then installed on the bracket in an integral manner. During the process of clamping and releasing the pencil by the clamping wheel, even if the pencil feeding unit is driven to rotate, the bracket drives the worm, the worm wheel and the clamping wheel to rotate along the axis of the worm in an integral and synchronous manner. During the whole process, the meshing depth of the worm and the worm wheel is always kept at the same position, which can effectively ensure the stability of power transmission and the strength of the gear, and can greatly reduce noise. At the same time, the transmission and clutch functions can be realized at the same time through the setting of the differential sliding member.

[0015] The principle and structure of the structure are simple, the cost is low, and it is stable and reliable, and it effectively solves the problems of unstable transmission of worm and worm gear parts of current pencil sharpeners, easy damage of gears, short life and high noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above technical content of the utility model and the following specific implementation methods will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the technical solutions claimed for protection. In the accompanying drawings, the same reference numerals represent the same or similar elements.

[0017] Figure 1 It is a schematic diagram of the assembly of the pen feeding unit;

[0018] Figure 2 is a schematic diagram of a bottom view of a pen feeding unit;

[0019] Figure 3 is a schematic cross-sectional view of a pen feeding unit;

[0020] Figure 4 It is a three-dimensional schematic diagram of the bracket (from the bottom to the top);

[0021] Figure 5 is a three-dimensional schematic diagram of the bracket (top-down perspective);

[0022] Figure 6 It is a three-dimensional schematic diagram of the worm gear;

[0023] Figure 7 It is a three-dimensional schematic diagram of the worm gear;

[0024] Figure 8 It is a schematic diagram of the exploded view of the pen feeding mechanism (top-down perspective);

[0025] Fig. 9 It is a schematic diagram of the positioning part;

[0026] Fig.10 is a schematic diagram of the turntable (top-down perspective);

[0027] Fig.11 is a schematic diagram of the turntable component (bottom-up perspective);

[0028] Fig.12 It is a schematic diagram of the bottom shell;

[0029] Fig.13 is a schematic diagram of a rotating part (bottom-up perspective);

[0030] Fig.14 is a schematic diagram of the cover;

[0031] Fig.15 It is a schematic diagram of the pen feeding mechanism when no pencil is inserted (viewed from top to bottom);

[0032] Fig.16 is a schematic diagram of the pen feeding mechanism when no pencil is inserted (from bottom to top perspective);

[0033] Fig.17 It is a schematic diagram of the pen feeding mechanism when the pencil is inserted (from top to bottom perspective);

[0034] Fig.18 It is a schematic diagram of the pen feeding mechanism when the pencil is inserted (from the bottom to the top).

[0035] The reference numerals are described as follows:

[0036] Pen feeding unit: 10

[0037] Elastic: 90

[0038] - Bracket: 100

[0039] Cavity: 110

[0040] First cavity: 111

[0041] Second cavity: 112

[0042] Bracket first hole: 120

[0043] The second hole of the bracket: 130

[0044] The third hole of the bracket: 140

[0045] Bracket bump: 150

[0046] Worm gear: 200

[0047] First assembly column: 210

[0048] Worm segment: 220

[0049] Second assembly column: 230

[0050] Input wheel: 240

[0051] Worm gear: 300

[0052] Differential slip: 310

[0053] Clamping wheel: 400

[0054] Axle: 500

[0055] First shaft section: 510

[0056] Second axis section: 520

[0057] The third axis section: 530

[0058] Fourth axis section: 540

[0059] Pen feeding hole: 600

[0060] Turntable parts: 700

[0061] Positioning piece: 710

[0062] First chute: 711

[0063] Fixed blocks: 712

[0064] Positioning piece assembly hole: 713

[0065] Turntable parts: 720

[0066] First bump: 721

[0067] Second bump: 722

[0068] Turntable chute: 723

[0069] Support: 800

[0070] Rotating parts: 820

[0071] Gear surface: 821

[0072] Rotary adapter: 822

[0073] Keyway: 823

[0074] - Bottom shell: 830

[0075] Support assembly holes: 831

[0076] Support center hole: 832

[0077] Cover: 810

[0078] Cover assembly holes: 811 DETAILED DESCRIPTION

[0079] The detailed features and advantages of the present invention are described in detail in the specific implementation modes below, and the content is sufficient to enable any technical personnel in this field to understand the technical content of the present invention and implement it accordingly. According to the description, claims and drawings disclosed in this specification, the technical personnel in this field can easily understand the relevant purposes and advantages of the present invention.

[0080] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0081] In the description of this embodiment, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships that are defined with reference to the coordinates of the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0082] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0083] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0084] Figure 1 The figure shows a schematic assembly diagram of the pen feeding unit 10 from a bottom-up perspective, which includes: a bracket 100, a worm member 200, a worm wheel member 300, a clamping wheel 400 and an axle 500, wherein the bracket 100 includes a cavity 110, and at least a portion of the worm member 200, the worm wheel member 300, the clamping wheel 400 and the axle 500 are accommodated in the cavity 110, and the clamping wheel 400 is sleeved on the axle 500, and the worm member 200 and the worm wheel member 300 transmit the power output by the motor to the clamping wheel 400, thereby driving the pencil in and out of the pencil sharpener.

[0085] The three pen feeding units 10 surround and form a pen entry hole 600 of which the size can be changed.

[0086] Figure 4 , Figure 5 The figure shows a three-dimensional schematic diagram of the bracket. As can be seen from the figure, the bracket 100 includes a first bracket hole 120, a second bracket hole 130, a third bracket hole 140, and a bracket protrusion 150. The two ends of the axle 500 are respectively accommodated in the first bracket hole 120 and the second bracket hole 130, so that the axle 500 can be rotatably installed in the bracket 100. The side of the bracket 100 includes a bracket protrusion 150. Specifically, the bracket protrusion 150 is a protrusion that is approximately a triangular prism. The upper surface of the bracket 100 includes a bracket third hole 140, and the bracket third hole 140 can accommodate the upper end of the worm member 200.

[0087] Figure 6 The worm member 200 is a three-dimensional schematic diagram. The worm member 200 includes a first assembly column 210 , a worm segment 220 , a second assembly column 230 , and an input wheel 240 .

[0088] Figure 7 FIG. 1 is a perspective schematic diagram of a worm gear 300 , which includes a differential slip element 310 .

[0089] Specifically, the cavity 110 of the bracket 100 is divided into two parts, including a first cavity 111 and a second cavity 112. The worm gear 200 is adaptively assembled in the second cavity 112, and the worm wheel 300 is adaptively assembled in the first cavity 111. The worm gear 200 and the worm wheel 300 are respectively placed in cavities that are adapted to their own structures, so that power transmission is more stable.

[0090] Working principle of pen feeding unit

[0091] Figure 2 The figure shows the bottom view of the pen feeding unit. Figure 3 The figure shows a schematic cross-sectional view of the pen feeding unit. Figure 1 to Figure 3 It can be seen that the assembly process of the pen feeding unit is as follows: the first shaft section 510 and the fourth shaft section 540 are the two ends of the wheel shaft 500, respectively, the wheel shaft 500 is matched with the first hole 120 of the bracket and the second hole 130 of the bracket through the first shaft section 510 and the fourth shaft section 540, respectively, the second assembly column 230 of the worm member 200 can be matched with the third hole 140 of the bracket to achieve assembly, the worm wheel member 300 and the clamping wheel 400 are respectively sleeved on the second shaft section 520 and the third shaft section 530, and the gears on the outer surface of the worm wheel member 220 are meshed with each other. The worm wheel member 300 is frictionally sleeved with the second shaft section 520, and the clamping wheel 400 is fixedly sleeved with the third shaft section 530, and can rotate synchronously. The axis of the worm gear 300 is perpendicular to the axis of the worm gear 200, the clamping wheel 400 and the axle 500 can rotate synchronously, the differential slipping member 310 is frictionally sleeved with the second shaft section 520, the rotation of the worm gear 300 is transmitted to the axle 500 through the differential slipping member 310, the worm gear 300 and the differential slipping member 310 can rotate synchronously, when the pen feeding speed and the pencil sharpening speed are different, slipping will occur between the inner surface of the differential slipping member 310 and the outer surface of the second shaft section 520, causing the differential slipping member 310 to idle, at this time the worm gear 300 idles, the axle 500 no longer rotates, and thus the clamping wheel 400 no longer rotates, and further will not drive the pencil to move, thereby realizing the transmission and clutch functions of the pen feeding mechanism.

[0092] The worm section 220 of the worm member 200 meshes with the gear on the outer periphery of the worm wheel member 300. As can be seen from the figure, due to the assembly relationship of the pen feeding unit 10, the axes of the worm member 200 and the worm wheel member 300 are perpendicular, and the meshing depth of the worm member 200 and the worm wheel member 300 is constant. Optionally, the differential slip member 310 can be arranged between the turbine member 300 and the second shaft section 520; it can also be arranged on the second shaft section 520 adjacent to the worm wheel member 300.

[0093] Working principle of pen feeding mechanism

[0094] Depend on Figure 8 to Figure 11It can be seen that the turntable member 700 includes a positioning member 710 and a turntable member 720, the positioning member 710 includes a first slide groove 711, and the first protrusion 721 of the turntable member 720 is configured to be able to extend out of the first slide groove 711 and cooperate with the first slide groove 711 so that the first protrusion 721 can slide in the first slide groove 711, and the fixing block 712 and the first protrusion 721 are connected by the elastic member 90, so that relative rotation can occur between the positioning member 710 and the turntable member 720.

[0095] Depend on Figure 12 to Figure 14 It can be seen that the second assembly column 230 of the worm gear can extend from the third hole 140 of the bracket, and can pass through the turntable slot 723 and the positioning member assembly hole 713 in sequence. Optionally, in addition to using the upper end of the worm gear 200 to penetrate, a protrusion that can be adapted to penetrate the turntable slot 722 and the positioning member assembly hole 730 can also be directly set at the corresponding position of the bracket 100. The first assembly column 210 passes through the support member assembly hole 831, and the input member 230 circumferentially includes a gear structure, which can be engaged with the gears arranged circumferentially on the rotating member 820. The rotating member 820 includes a rotating connecting member 822 below. Specifically, the rotating connecting member 822 is cylindrical and passes through the support member center hole 832, so that the rotating member 820 can rotate relative to the bottom shell 830. The inner wall of the rotating connecting member 822 includes a keyway 823, and the keyway 823 can be connected to the power input end (such as a motor, not shown in the figure) to achieve synchronous rotation.

[0096] The initial state of the clamping mechanism is as follows Fig.15 and Fig.16 As shown, the turntable member 720 rotates in the clockwise direction under the pulling force of the elastic member 90, and the second protrusion 722 of the turntable is pressed on the bracket protrusion 150 of the pen feeding unit, pushing the pen feeding unit to rotate in the clockwise direction around the axis of the worm member 200, thereby driving the clamping wheel 400 to turn toward the center of the pen feeding hole 600, and finally the clamping wheels 400 are balanced against each other to form the smallest pen feeding hole 600. At this time, the turntable member 720 is in the first position, and the elastic member 90 is in the first stretched state.

[0097] When the pencil is inserted, when the pencil surface to be cut contacts the surface of the clamping wheel 400, the pencil can be rolled into the pen feeding hole 600 under the action of the rotational force of the clamping wheel 400, and the clamping wheel 400 generates a radially outward thrust under the reaction force of the pencil surface to be cut, thereby driving the pen feeding unit 300 to rotate counterclockwise along the axis of the worm member 200, and at the same time making the pen feeding hole 600 larger. At the same time, due to the abutment between the bracket protrusion 150 and the second protrusion 722 of the rotating disk, the rotating disk member 720 overcomes the elastic force of the tension spring under the reaction force of the pen feeding unit 10 and rotates counterclockwise, and at the same time pushes the elastic member 90 to lengthen until the cutting surface completely passes through the pen feeding hole 600, at which time the rotating disk member 720 is in the second position, and at this time the elastic member 90 is in the second tension state. It is easy to understand that the tension of the elastic member 90 in the second tension state is greater than the tension in the first tension state.

[0098] When the pencil is sharpened, when the clamping wheel 400 reverses and the pencil is withdrawn from the pen feeding hole 600, the turntable 720 rotates clockwise to return to the first position under the tension of the tension spring, and the entire pen feeding unit 10 returns to the initial state.

[0099] Industrial Applicability

[0100] The utility model provides a stable pencil feeding and pencil sharpening machine, which has the beneficial effect compared with the prior art in that the structure mainly includes components such as a worm, a worm wheel, and a differential sliding member. Among them, the shafts of the worm and worm wheel are assembled on the bracket in a cross-shaped manner with a fixed meshing depth, and the differential sliding member is directly coupled with the worm wheel. The worm, worm wheel and clamping wheel are then installed on the bracket in an integral manner. During the process of clamping and releasing the pencil by the clamping wheel, even if the pencil feeding unit is driven to rotate, the bracket drives the worm, worm wheel and clamping wheel to rotate along the axis of the worm in an integral and synchronous manner. During the entire transmission and clutch process, the meshing depth of the worm and worm wheel is always maintained at the same position, which can effectively ensure the stability of power transmission and the strength of the gear, and can greatly reduce noise. At the same time, the transmission and clutch functions can be realized at the same time through the setting of the differential sliding member.

[0101] The principle and structure of the structure are simple, the cost is low, and it is stable and reliable, and it effectively solves the problems of unstable transmission of worm and worm gear parts of current pencil sharpeners, easy damage of gears, short life and high noise.

[0102] The terms and expressions used here are for description only, and the present invention should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, changes and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

[0103] Similarly, it should be pointed out that although the utility model has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the utility model, and various equivalent changes or substitutions can be made without departing from the spirit of the utility model. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the utility model, they will fall within the scope of the claims of the utility model.

Claims

1. A stable pencil feeding and pencil sharpening machine, characterized in that: The invention comprises a housing, a motor, a pen feeding mechanism and a pen sharpening mechanism, wherein the motor, the pen feeding mechanism and the pen sharpening mechanism are accommodated in the housing, the pen feeding mechanism comprises a rotating disk (700), a supporting member (800) and at least two pen feeding units (10), the pen feeding units (10) are accommodated between the rotating disk (700) and the supporting member (800), a pen feeding hole (600) is formed between the pen feeding units (10), and during the pen sharpening process, the pen feeding hole (600) can change in size, wherein the pen feeding unit (10) comprises: a bracket (100), a worm member (200), a worm wheel member (300), a clamping wheel (400), and a support member (800). ) and axle (500), the bracket (100) is a cavity structure, at least a part of the axle (500) is rotatably assembled in the bracket (100), the worm gear (300) and the clamping wheel (400) are both sleeved on the axle (500), the central axes of the worm (200) and the worm gear (300) are perpendicular to each other and the distance between the central axes is fixed, the worm gear (300) also includes a differential slipping member (310), the worm gear (300) and the differential slipping member (310) can rotate synchronously, and when the sharpening speed is different from the pen feeding speed, the differential slipping member (310) can slip with the axle (500).

2. The stable pencil feeding and pencil sharpening machine according to claim 1, characterized in that: The number of the pen feeding unit components (10) is 3 and they are evenly arranged along the circumferential direction.

3. The stable pencil feeding and pencil sharpening machine according to claim 2, characterized in that: The bracket (100) comprises a first cavity (111) and a second cavity (112); the first cavity (111) is capable of being adapted to the worm member (200); and the second cavity (112) is capable of being adapted to the worm wheel member (300).

4. The stable pencil feeding and pencil sharpening machine according to claim 3, characterized in that: The differential slipping member (310) is made of soft elastic material.

5. The stable pencil feeding and pencil sharpening machine according to claim 4, characterized in that: The differential slipping member (310) is sleeved between the worm gear member (300) and the wheel shaft (500).

6. The stable pencil feeding and pencil sharpening machine according to claim 4, characterized in that: The differential slipping member (310) is sleeved adjacent to the worm gear member (300) on the wheel shaft (500).

7. The stable pencil feeding and pencil sharpening machine according to claim 5 or 6, characterized in that: The outer surface of the worm gear (300) is a helical gear.

8. The stable pencil feeding and pencil sharpening machine according to claim 7, characterized in that: The clamping wheel (400) is made of soft elastic material.

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