Pencil clamping structure and automatic pencil feeding and discharging structure of electric pencil sharpener

Abstract

The utility model discloses a pencil clamping structure and an automatic pencil feeding and discharging structure of an electric pencil sharpener. The pencil clamping structure comprises an upper cover, a clamping piece limiting disc and a clamping piece assembly. The automatic pen feeding and discharging structure comprises a middle base, a gear shaft assembly, a gear disc and a base, and the middle base is buckled with the base; and the upper cover of the pen clamping structure is buckled with the middle base of the automatic pen feeding and discharging structure. The structure of three clamping pieces is adopted, and self-centering clamping is achieved through the clamping piece limiting disc and the first spring, so that pencil clamping is more convenient and stable, and the problem of pencil core shift of a sharpened pencil is solved; according to the pencil sharpener, the cone-frustum-shaped roller structures are arranged on the gear shaft assembly, the arc-shaped grooves are formed in the conical surfaces of the rollers, and pencils with different outer diameters can be automatically fed and sharpened through the displacement of the rollers on the gear shaft and the small relative displacement of the pair of rollers.

Description

Technical Field

[0001] The utility model relates to a pencil sharpener in the technical field of cultural products, in particular to a pen clamping structure and an automatic pen in and out structure of an electric pencil sharpener. Background Art

[0002] As a tool for sharpening pencils, pencil sharpeners are widely used in study and work. In order to sharpen pencils better and more conveniently, automatic pencil sharpeners are loved by more and more users.

[0003] The existing automatic pencil sharpener has the problem of unstable and non-centered pencil clamping, which causes the pencil to be eccentric during sharpening, resulting in the cone being offset after sharpening, and the pen tip being non-centered, which easily causes the pencil lead to break and an unsightly appearance. In addition, the structure of the automatic pen in and out is complicated, and it is impossible to transport and sharpen pencils of different outer diameters. Utility Model Content

[0004] The utility model aims to provide a pencil clamping structure and an automatic pen feeding and discharging structure of an electric pencil sharpener in view of the deficiencies in the prior art, which can make the pencil clamping more convenient and stable and can automatically feed and sharpen pencils with different outer diameters.

[0005] The specific technical solution to achieve the purpose of this utility model is:

[0006] A pen clamping structure and an automatic pen in and out structure of an electric pencil sharpener, characterized in that the pen clamping structure comprises an upper cover, a clamping piece limiting plate and a clamping piece assembly;

[0007] The upper cover is a rectangular shell member with a first pen-feeding hole and a transmission disc cavity at the center, and three positioning shafts and three first spring seats are evenly distributed around the transmission disc cavity;

[0008] The clip limiting disk is a disk with a second pen feeding hole at the center, and three clip displacement holes and three transmission disk displacement holes are evenly distributed around the second pen feeding hole;

[0009] The clip assembly includes three clips, each clip is kidney-shaped, one end of which is provided with a rotating shaft hole, and the other end of which is provided with a first spring and a guide pin;

[0010] The clip limit plate and the clip assembly are sequentially arranged in the transmission plate cavity of the upper cover, and the three transmission plate displacement holes and the three clip shaft holes are respectively sleeved in the three positioning shafts, the guide pins of the three clips are respectively arranged in the three clip displacement holes of the clip limit plate, and the other ends of the three first springs are respectively arranged on the three first spring seats of the upper cover;

[0011] The automatic pen in and out structure comprises an intermediate base, a gear shaft assembly, a gear plate and a base;

[0012] The intermediate base is a rectangular shell member with a third pen-feeding hole at the center;

[0013] The gear shaft assembly includes a pair of shaft members, one end of which is provided with a gear, the middle is provided with a roller and a roller sleeve, and the other end is provided with a second spring;

[0014] The gear disc is a gear disc member with a fourth pen feeding hole at the center;

[0015] The base is a rectangular shell with a gear disc seat at the center, and a pair of gear shaft seats and a second spring seat are provided at the edge of the shell;

[0016] The gear disc is arranged in the gear disc seat of the base, the gear shaft assembly is arranged on the gear disc, the gear end of the shaft member is hinged with the gear shaft seat, the second spring end of the shaft member is connected with the second spring seat, and the gear of the shaft member is meshed with the gear disc;

[0017] The intermediate base is buckled with the base;

[0018] The upper cover of the pen clamping structure is buckled with the middle base of the automatic pen entry and exit structure.

[0019] The roller of the gear shaft assembly is a rubber piece, and the roller is in the shape of a truncated cone, and an arc-shaped groove is arranged radially on the conical surface.

[0020] The three clamping piece displacement holes and the three transmission plate displacement holes are all waist-shaped.

[0021] The utility model adopts a three-piece clamping structure, and realizes self-centering clamping through the action of a clamping piece limiting disk and a first spring, so that the pencil clamping is more convenient and stable, and the problem of pencil curling and sharpening eccentricity is solved; a structure in which a truncated cone-shaped roller is arranged on a gear shaft assembly, and an arc-shaped groove is arranged on the conical surface of the roller, and the roller is displaced on the gear shaft, and a pair of rollers are relatively displaced slightly, so that pencils with different outer diameters can be automatically fed and sharpened. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the pen clamp structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the automatic pen in and out structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the use state of the utility model;

[0026] Figure 5 It is a schematic diagram of the rolling component in the use state of the utility model;

[0027] Figure 6It is a schematic diagram of the transmission component in the use state of the utility model. DETAILED DESCRIPTION

[0028] The utility model is described in detail below with reference to the accompanying drawings.

[0029] See also Figure 1-3 The utility model relates to a pen clamping structure and an automatic pen-in-and-out structure of an electric pencil sharpener. The pen clamping structure is composed of an upper cover 1, a clamping piece limiting plate 2 and a clamping piece assembly 3.

[0030] See also Figure 1-2 The upper cover 1 is a rectangular shell with a first pen feeding hole 11 and a transmission disc cavity 12 in the center, and three positioning shafts 13 and three first spring seats 14 are evenly distributed around the transmission disc cavity 12; the clip limit plate 2 is a disk with a second pen feeding hole 21 in the center, and three clip displacement holes 22 and three transmission disc displacement holes 23 are evenly distributed around the second pen feeding hole 21; the clip assembly 3 is composed of three pieces, and the clip 31 is kidney-shaped, and a rotating shaft hole 311 is provided at one end thereof. , the other end is provided with a first spring 312 and a guide pin 313; the clip limit plate 2 and the clip assembly 3 are sequentially arranged in the transmission disc cavity 12 of the upper cover 1, and the three transmission disc displacement holes 23 and the shaft holes 311 of the three clips 31 are respectively sleeved in the three positioning shafts 13, the guide pins 313 of the three clips 31 are respectively arranged in the clip displacement holes 22 of the clip limit plate 2, and the other ends of the three first springs 312 are respectively arranged on the three first spring seats 14 of the upper cover 1.

[0031] See also Figure 1 and Figure 3 The automatic pen feeding and ejecting structure is composed of an intermediate base 4, a gear shaft assembly 5, a gear plate 6 and a base 7; the intermediate base 4 is a rectangular shell member with a third pen feeding hole 41 in the center; the gear shaft assembly 5 is a pair, and the gear shaft assembly 5 is a shaft-like member with a gear 51 at one end, a roller 52 in the middle, a roller sleeve 54 and a second spring 53 at the other end; the gear plate 6 is a gear disc member with a fourth pen feeding hole 61 in the center; the base 7 is a rectangular shell member with a gear plate seat 71 in the center, and a pair of gear shaft seats 72 and a second spring seat 73 are provided on the edge of the shell; the gear plate 6 is arranged in the gear plate seat 71 of the base 7, and a pair of gear shaft assemblies 5 are arranged on the gear plate 6, the gear end of the gear shaft is hinged to the gear shaft seat 72, the second spring 53 end of the gear shaft is connected to the second spring seat 73, and the gear 51 is meshed with the gear plate 6.

[0032] See also Figure 1-3 , the intermediate base 4 is buckled with the base 7; the pen clamping structure is buckled with the automatic pen entry and exit structure, and the upper cover 1 of the pen clamping structure is buckled with the intermediate base 4 of the automatic pen entry and exit structure.

[0033] See also Figure 1and Figure 3 The roller 52 of the gear shaft assembly 5 is a rubber member, and the roller 52 is in the shape of a truncated cone, and an arc-shaped groove 521 is provided in the radial direction on the conical surface.

[0034] See also Figure 1-2 In order to facilitate the clamping plate limiting plate 2 to have a swing range relative to the positioning shaft 13 of the upper cover 1, the three transmission plate displacement holes 23 are designed to be waist-shaped holes.

[0035] See also Figure 1-Figure 2 Since the clip 31 needs to swing around the positioning axis 13 on the clip limiting plate 2, three clip displacement holes 22 in the form of waist-shaped holes are provided on the clip limiting plate 2 to facilitate guiding the swing trajectory of the guide pin 313 on the clip 31.

[0036] The utility model is used as follows:

[0037] See also Figure 4 The utility model is used in conjunction with the cutting component 8 and the transmission component 9 of an electric pencil sharpener.

[0038] See also Figure 4 and Figure 5 The rolling component 8 is provided with a hob support 81 and a hob 82; the hob support 81 is provided with a hob internal gear 83, the hob 82 is provided with a hob external gear 84, and the hob internal gear 83 is meshed with the hob external gear 84.

[0039] See also Figure 4 and Figure 6 The transmission component 9 is provided with a motor 91, a power switch 92, a primary transmission gear 93, a secondary transmission gear 94 and a hob transmission gear shaft 95; the motor 91 drives the hob transmission gear shaft 95 via the primary transmission gear 93 and the secondary transmission gear 94; the power switch 92 is electrically connected to the motor 91; the hob transmission gear shaft 95 of the transmission component 9 is connected to the hob bracket 81 of the rolling component 8.

[0040] See also Figure 1 , Figure 4 , Figure 5 The gear plate 6 of the automatic pen in and out structure of the utility model is connected with the hob bracket 81 of the rolling part 8.

[0041] The utility model works like this:

[0042] The pencil is inserted into the first pen-entry hole 11 of the upper cover 1. When the pencil is inserted into the second pen-entry hole 21 of the clip limiting plate 2, it touches the three-piece clip assembly 3. At this time, the pencil overcomes the resistance of the first spring 312 under the action of external force, pushes the three kidney-shaped clips 31 open, and under the action of the first spring 312, the pencil is self-centering and clamped in the utility model.

[0043] With the action of external force, the pencil is further inserted, passes through the third pen-feeding hole 41 of the middle base 4 and the fourth pen-feeding hole 61 of the gear plate 6, and is pressed onto a pair of rollers 52 of the gear shaft assembly 5, overcomes the resistance of the second spring 53 on the gear shaft assembly 5, and enters between the rollers 52. As the gear shaft assembly 5 is subjected to the downward pressure of the pencil, the gear plate 6 together with the hob bracket 81 of the rolling component 8 moves downward, and the hob bracket 81 touches the power switch 92 on the transmission component 9, and the motor 91 is started. The motor 91 drives the hob transmission gear shaft 95 to rotate forward through the primary transmission gear 93 and the secondary transmission gear 94.

[0044] The hob drive gear shaft 95 drives the hob bracket 81 of the curling component 8 and the gear plate 6 of the automatic pen feeding and ejecting structure to rotate. Since the gear plate 6 is engaged with the gear 51 of the gear shaft assembly 5, the gear plate 6 drives the gear 51, the roller 52 and the roller sleeve 54 of the gear shaft assembly 5 to rotate. At this time, a pair of rollers 52 clamp the pencil and automatically move downward, realizing automatic pen feeding and gradually entering the curling position.

[0045] At the same time, the hob transmission gear shaft 95 drives the hob bracket 81 of the rolling component 8, and the hob inner gear 83 on the hob bracket 81 drives the hob outer gear 84 and the hob 82 to rotate, thereby automatically rolling the pencil.

[0046] When the pencil tip is finished being curled and the tip touches the completion contact point, the circuit board controls the motor 91 to perform a reverse operation, and the roller drive gear shaft 95 drives the roller bracket 81 of the curling component 8 and the gear plate 6 of the automatic pen entry and exit structure to reverse, and the gear plate 6 drives the gear shaft assembly 5 to reverse. At this time, the pair of rollers 52 clamp the pencil and automatically move upward until the pencil retreats to the top of the pair of rollers 52 and then stops automatically, realizing the process of gradually exiting the curling position and automatically taking out the pencil.

[0047] In order to ensure that the pencil advances smoothly and automatically and gradually enters the curling position, and to protect the pencil from overload, the transmission design between the roller 52 and the pencil is friction transmission, and the roller 52 of the gear shaft assembly 5 is made of rubber.

[0048] In order to adapt to the sharpening of pencils with different outer diameters and reduce the swing amplitude of the pair of gear shaft assemblies 5 to reduce the overall structure of the product, the roller 52 of the utility model is designed to be a truncated cone. Compared with a cylindrical shape, the pair of gear shaft assemblies 5 can clamp a larger pencil outer diameter with a smaller swing amplitude.

[0049] The utility model provides a groove 521 on the truncated cone of the roller 52 of the gear shaft assembly 5, which is beneficial to the stable balance of the pencil.

Claims

1. A pen clamping structure and automatic pen insertion and removal structure of an electric pencil sharpener, characterized in that: The pen clamp structure comprises an upper cover (1), a clamp limiting plate (2) and a clamp assembly (3); The upper cover (1) is a rectangular shell member with a first pen-feeding hole (11) and a transmission disc cavity (12) at the center, and three positioning shafts (13) and three first spring seats (14) are evenly distributed around the periphery of the transmission disc cavity (12); The clip limiting disk (2) is a circular disk with a second pen feeding hole (21) at the center, and three clip displacement holes (22) and three transmission disk displacement holes (23) are evenly distributed around the second pen feeding hole (21); The clip assembly (3) comprises three clips (31), each clip (31) being kidney-shaped, with a rotating shaft hole (311) provided at one end and a first spring (312) and a guide pin (313) provided at the other end; The clip limit plate (2) and the clip assembly (3) are sequentially arranged in the transmission plate cavity (12) of the upper cover (1), and the three transmission plate displacement holes (23) and the rotation shaft holes (311) of the three clips (31) are respectively sleeved in the three positioning shafts (13), the guide pins (313) of the three clips (31) are respectively arranged in the three clip displacement holes (22) of the clip limit plate (2), and the other ends of the three first springs (312) are respectively arranged on the three first spring seats (14) of the upper cover (1); The automatic pen insertion and extraction structure comprises an intermediate base (4), a gear shaft assembly (5), a gear plate (6) and a base (7); The intermediate base (4) is a rectangular shell member with a third pen inlet hole (41) provided at the center; The gear shaft assembly (5) comprises a pair of shaft members, one end of which is provided with a gear (51), the middle of which is provided with a roller (52) and a roller sleeve (54), and the other end of which is provided with a second spring (53); The gear disc (6) is a gear disc component with a fourth pen feeding hole (61) provided at the center; The base (7) is a rectangular shell with a gear disc seat (71) at the center, and a pair of gear shaft seats (72) and a second spring seat (73) are provided at the edge of the shell; The gear plate (6) is arranged in a gear plate seat (71) of the base (7), the gear shaft assembly (5) is arranged on the gear plate (6), the gear end of the shaft member is hinged to the gear shaft seat (72), the second spring (53) end of the shaft member is connected to the second spring seat (73), and the gear (51) of the shaft member is meshed with the gear plate (6); The intermediate base (4) is buckled with the base (7); The upper cover (1) of the pen clamping structure is buckled with the middle base (4) of the automatic pen insertion and extraction structure.

2. The pen clamping structure and automatic pen insertion and removal structure of the electric pencil sharpener according to claim 1, characterized in that: The roller (52) of the gear shaft assembly (5) is a rubber piece, and the roller (52) is in the shape of a truncated cone, with an arc-shaped groove (521) being provided in the radial direction on the conical surface.

3. The pen clamping structure and automatic pen insertion and removal structure of the electric pencil sharpener according to claim 1, characterized in that: The three clamping piece displacement holes (22) and the three transmission plate displacement holes (23) are all waist-shaped.

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