Knife rest assembly of pencil sharpener

Abstract

The utility model provides a pencil sharpener knife rest assembly, which is arranged in an automatic pencil sharpener and is driven by a motor to sharpen a pencil, the pencil sharpener knife rest assembly comprises a cover part, a support part and a knife part, the support part comprises a cavity, at least one part of the knife part is accommodated in the cavity of the support part, and the knife part and the cover part are detachable relative to the support part. The cutter part can rotate around the axis of the supporting part, a lock catch piece is integrally arranged in the circumferential direction of the cover part, a fixing piece is integrally arranged in the circumferential direction of the supporting part, the lock catch piece corresponds to the fixing piece in position, the lock catch piece can deform in the radial direction, and the cover part and the supporting part have two matched states.

Description

Technical Field

[0001] The utility model relates to the field of stationery and file parts, in particular to a pencil sharpener tool holder assembly. Background Art

[0002] Since its advent, the automatic pencil sharpener has brought great changes to pencil cutting. People no longer need to use utility knives to cut pencils. The use of pencil sharpeners makes pencil sharpening convenient and safe. The tool in the pencil sharpener is an important component and the key to the pencil sharpening effect. The blade of the tool is a consumable item. During the long-term cutting process, the blade becomes blunt, which will cause the pencil cutting effect to deteriorate. In the past, the entire pencil sharpener was an integrated fixed design. When the tool is no longer sharp, the entire pencil sharpener must be discarded, causing waste. In order to extend the service life of the entire automatic pencil sharpener, the structure of the replaceable tool holder assembly is currently being used more and more widely in automatic pencil sharpeners. By designing a detachable tool holder cover, the tool holder cover can be removed and then the tool can be replaced. Among these structures, the main structure currently used is to design the locking boss on the side wall of the tool holder cover, and then embed the tool holder cover into the pencil sharpener. When it is necessary to remove the tool holder cover to replace the tool holder, use specific or professional tools to pry out to remove the tool holder cover, then remove the tool holder assembly, put in the new tool holder assembly, and then replace the tool holder cover to complete the replacement of the tool holder assembly. Most of the locking bosses on the existing tool holder covers are designed on the vertical surface of the side wall of the tool holder cover. When removing the tool holder cover, it is necessary to use specific or professional tools to pry out to remove the tool holder cover. When the locking boss is out of the locking position, it is forcibly pulled out by prying force, which will cause great wear and pressure on the locking position, so it is very easy to damage the locking boss and the parts of the locking position and affect the service life of the whole machine. In addition, it is necessary to use specific or professional tools to remove it, which is very inconvenient to replace, affecting the consumer experience. Utility Model Content

[0003] The utility model aims to provide a knife holder assembly for a pencil sharpener, wherein the knife holder cover can be conveniently removed or installed to replace the knife, and the structure is convenient to operate and not easy to be damaged.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A pencil sharpener tool holder assembly is arranged in an automatic pencil sharpener to cut pencils under the drive of a motor, comprising: a cover, a support and a tool portion, the support portion comprising a cavity, at least a part of the tool portion is accommodated in the cavity of the support portion, and the tool portion and the cover portion are both detachable relative to the support portion, during use, the tool portion can rotate around the axis of the support portion, a locking member is integrally arranged along the circumferential direction of the cover portion, a fixing member is integrally arranged along the circumferential direction of the support portion, the locking member and the fixing member are in corresponding positions, the locking member can be deformed in the radial direction, and the cover portion and the support portion have two matching states:

[0006] Locked state: In the locked state, the locking member and the fixing member are locked with each other, and the cover and the supporting part are fixedly locked and connected, and the pencil sharpener can work normally;

[0007] Unlocked state: In the unlocked state, the locking member can be separated from the fixing member, so that the cover portion can be removed from the supporting portion. At this time, the pencil sharpener is in a non-working state and the tool portion can be replaced.

[0008] Furthermore, the locking component includes a locking protrusion, an elastic component and a first buckle.

[0009] Furthermore, the buckle protrusion and the first buckle are both fixedly connected to the elastic member.

[0010] Furthermore, by applying force to the locking buckle protrusion, the elastic member can be driven to deform in the radial direction, thereby driving the first buckle to move in the radial direction.

[0011] Furthermore, the elastic member is a U-shaped elastic arm.

[0012] Furthermore, the fixing member includes a second buckle, the second buckle is arranged in pair with the first buckle, and the second buckle can be buckled and locked together with the first buckle.

[0013] Furthermore, the tool portion includes a pen entry hole, a cutting chamber, a transmission base, a tool holder, and a cutting tool. The part of the pencil to be cut enters the cutting chamber through the pen entry hole. The front end of the cutting chamber is conical. The cutting tool is fixedly arranged on the tool holder. The cutting surface of the cutting tool can cut the pencil placed in the cutting chamber. The tool holder is fixedly arranged on the transmission base, and the transmission base can be connected to the motor power gear for synchronous rotation.

[0014] Furthermore, the cutting tool is a rolling cutter.

[0015] Furthermore, the number of locking parts and fixing parts is 2, the locking parts are arranged at 180° relative to each other on both sides of the outer wall of the cover, and the fixing parts are arranged at 180° relative to each other on both sides of the inner wall of the support part.

[0016] Furthermore, the elastic member includes a first elastic arm and a second elastic arm, the locking protrusion is fixedly arranged in the middle position of the first elastic arm and the projection width of the locking protrusion along the axial direction is smaller than the projection width of the first elastic arm along the axial direction, and the first clip is arranged on both sides of the first elastic arm and is staggered with the locking protrusion in the circumferential direction.

[0017] Furthermore, the lower surface of the locking protrusion includes a first guiding inclined surface.

[0018] Furthermore, the locking member is made of plastic.

[0019] The utility model provides a pencil sharpener tool holder assembly, which has the following beneficial effects compared with the prior art:

[0020] Through the structural design of the locking piece on the tool holder cover and the fixing piece on the support part, the locking piece includes an elastic structure that can move in the radial direction. After a little force is applied to the locking piece in the radial direction, the locking piece can be disengaged from the fixing piece. There will be no interaction force between the two during the removal process, and no damage will be caused to any parts. In addition, the structural design of the tool holder assembly makes it very smooth and simple for users to grasp and apply force, and users can complete the installation or removal of the tool holder assembly with one hand.

[0021] The structure has simple principle and structure, low cost, stability and reliability, strong adaptability, and effectively solves the problem of short service life of the pencil sharpener caused by the difficulty in removing the knife holder cover and easy damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 is a schematic diagram of an exploded view of the tool holder assembly;

[0024] Figure 2 is a three-dimensional schematic diagram of the cover;

[0025] Figure 3 is a schematic diagram of a side view of the cover;

[0026] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional view in the DD direction;

[0027] Figure 5 yes Figure 3 Schematic diagram of the cross-sectional view in the FF direction;

[0028] Figure 6 It is a schematic diagram of the tool section;

[0029] Figure 7 is a schematic diagram of a side view of a tool portion;

[0030] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional view in the DD direction;

[0031] Fig. 9 is a three-dimensional schematic diagram of the support portion;

[0032] Fig.10 It is a three-dimensional schematic diagram of the support portion from an upward viewing angle;

[0033] Fig.11 is a schematic diagram of a side view of a support portion;

[0034] Fig.12 yes Fig.11 Schematic diagram of the cross-sectional view in CC direction;

[0035] Fig.13 yes Fig.11 Schematic diagram of the cross-sectional view in the EE direction;

[0036] Fig.14 is a schematic diagram of a top view of a support portion;

[0037] Fig.15 It is a three-dimensional schematic diagram of the combined state of the tool holder assembly;

[0038] Fig.16 is a schematic side view of the tool holder assembly in the assembled state;

[0039] Fig.17 is a schematic diagram of a cross-sectional view of the tool holder assembly in the AA direction in a locked state;

[0040] Fig.18 It is a schematic diagram of a cross-sectional view of the tool holder assembly in the BB direction in a locked state;

[0041] Fig.19 is an enlarged schematic diagram of the cooperation between the first buckle and the second buckle in the locked state;

[0042] Fig. 20 It is a schematic diagram of a cross-sectional view in the AA direction in which a force is applied radially inward to the locking protrusion so that the tool holder assembly is in an unlocked state;

[0043] Fig.21 is a schematic diagram of a cross-sectional view in the BB direction when the tool holder assembly is in an unlocked state;

[0044] Fig. 22 It is an enlarged schematic diagram of the cooperation between the first buckle and the second buckle in the unlocked state.

[0045] The reference numerals are described as follows:

[0046] Motor power gear 90

[0047] Cover 100

[0048] Locking piece 110

[0049] Locking protrusion 111

[0050] Elastic member 112

[0051] First buckle 113

[0052] Cover 120

[0053] Through hole 130

[0054] Side wall 140

[0055] Supporting part 200

[0056] Fixing 210

[0057] Second buckle 213

[0058] Gap 211

[0059] Tool Department 300

[0060] Pen hole 310

[0061] Cutting chamber 320

[0062] Tool holder 330

[0063] Cutting tools 340

[0064] Transmission base 350

[0065] Mounting 360

[0066] Guide surface 1111

[0067] The first guiding slope 1111

[0068] First elastic arm 1121

[0069] The second elastic arm 1122

[0070] Applied force F DETAILED DESCRIPTION

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0075] 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.

[0076] Figure 1 This is a schematic diagram of the exploded view of the tool holder assembly. Figure 1 The device includes, from top to bottom, a cover portion 100 , a tool portion 300 , and a support member 200 .

[0077] Figure 2 to Figure 5 It is a schematic diagram of the cover structure, wherein: Figure 2 1 is a three-dimensional schematic diagram of the cover 100, which includes a locking member 110, a cover plate 120, and a side wall 140, wherein the center of the cover plate 120 includes a through hole 130. The locking member 110 can be deformed in a radial direction.

[0078] Figure 4 , Figure 5It is a cross-sectional view of the cover 100 in different directions. It can be seen that the locking member 110 includes a locking protrusion 111, an elastic member 112 and a first buckle 113, wherein the locking protrusion 111 and the first buckle 113 are fixedly connected to the elastic member 112, and the lower surface of the locking protrusion 111 also includes a first guide surface 1111, and the elastic member 112 is a U-shaped elastic arm, including a first elastic arm 1121 and a second elastic arm 1122, the first elastic arm 1121 is radially located outside the second elastic arm 1122, and the second elastic arm 1122 is connected to the cover plate 120, and the lower ends of the first elastic arm 1121 and the second elastic arm 1122 are connected so that the whole is U-shaped. It is easy to understand that when a radial force is applied to the elastic member 112, the elastic member 112 can be displaced in the radial direction. Specifically, the locking protrusion 111 and the first buckle 113 are fixed to the first elastic arm 1121. Through the setting of the locking protrusion 111, the user can easily pinch the locking protrusion 111, thereby applying radial force to the elastic member 112 and driving the first buckle 113 to move radially.

[0079] Figure 6 to Figure 8 is a schematic diagram of the structure of the tool part 300, wherein: Figure 6 3D schematic diagram of the tool unit 300, which includes a pen-entry hole 310, a cutting chamber 320, a transmission base 350, a tool holder 330, a cutting tool 340 and a mounting member 360. The part of the pencil to be cut can enter the cutting chamber 320 through the pen-entry hole 310 for cutting. The cutting tool 340 is fixed at a predetermined angle and position under the cooperation of the tool holder 330 and the mounting member 360. The tool holder 330 is fixed on the transmission base 350. Figure 8 It can be seen that the axis of the cutting tool 340 is at a certain angle to the axis of the cutting chamber 320. It is easy to understand that the cutting angle of the pencil can be controlled by setting the angle. Figure 8 It can be seen that the cutting chamber 320 is similar to the cutting chamber in a conventional pencil sharpener, with a cylindrical upper portion and a conical lower portion. The conical portion has an opening on the side, and a portion of the cutting tool 340 extends into the cutting chamber through the side opening to form a cutting surface for cutting the pencil. The transmission base 350 includes a through hole in the middle, and a rib on the through hole. The through hole structure can mesh with the motor power gear 90 to achieve the transmission of motor power. Since this type of cutting chamber 320 and the coordination between the motor and the tool part are relatively common structures, they will not be described in detail.

[0080] Figures 9 to 14 is a schematic structural diagram of the support member 200, wherein: Fig. 9 , Fig.10The figure is a three-dimensional schematic diagram of the support part 200 from different viewing angles. The support part 200 is a hollow cylinder as a whole and includes a cavity structure. When in a locked state, at least a part of the tool part 300 is accommodated in the cavity structure. The support part 200 includes a fixing member 210, which is arranged on the inner wall of the support part 200. The fixing member 210 cooperates with the locking member 110 to achieve the fixing of the cover part 100 and the support part 200. The fixing member 210 includes a notch 211 and a second buckle 213 extending radially inward. In the locked state, the first buckle 113 and the second buckle 213 correspond to each other and can be buckled together.

[0081] Specifically, refer to Figure 2 The locking protrusion 111 can be arranged at the middle position of the upper end of the first elastic arm 1121, and the first buckle 113 is arranged on both sides of the lower position of the locking protrusion 111, and the width of the locking protrusion 111 is narrower than that of the first elastic arm 1121. The projection of the locking protrusion 111 along the axial direction can just continuously complement the projections of the two first buckles 113 in the same direction, and has the same width as the projection of the first elastic arm 1121.

[0082] Optionally, the locking protrusion 111 can also be set flush with the first buckle 113 on the same horizontal line. In addition to being a protrusion extending radially outward along the first elastic arm 1121, the locking protrusion 111 can also be a protrusion extending axially upward, or it can be set on the inner wall of the second elastic arm 1122. Any structure that applies force through the locking protrusion 113 to enable the elastic member 112 to undergo radial deformation and does not interfere with the first buckle 113 is allowed.

[0083] Specifically, refer to Fig.10 The notch 211 is disposed between the two second buckles 213, and the width of the notch 211 is substantially consistent with the width of the locking boss 111. In the locked state, the locking boss 111 is accommodated in the notch 211, and the rotation of the cover 100 can also be limited.

[0084] When the tool needs to be replaced, refer to Fig. 20 , use your hand or any conventional tool to act on the locking boss 111 so that it is subjected to a radially inward force. At this time, driven by the locking boss 111, the elastic member 112 is deformed radially inward, thereby driving the first buckle 113 to swing inward, until the first buckle 113 is completely staggered with the second buckle 213 in radial position (such as Fig.21 , 22As shown), at this time, the cover 100 can be taken out upwards, and the discarded tool part 300 can be further taken out upwards, and the discarded tool part 300 can be replaced with a new tool part 300. When reinstalling the cover 100, align the first buckle 113 with the second buckle 213, and press the cover 100 directly downwards. When the guide surface 1111 below the locking protrusion 111 contacts the inner wall of the fixing member 210, under the interaction of forces, the locking protrusion 111 is pushed radially inwards, and the cover 100 is pressed downwards until the upper end surface of the first buckle 113 is offset from the lower end surface of the second buckle 213. Under the action of the elastic restoring force, the first buckle 113 swings radially outwards and locks with the second buckle 213, and the entire tool holder is restored to a locked state. During the unlocking and locking process, the first buckle 113 of the cover 100 is designed on a section of the elastic member 112. After squeezing the locking protrusion 111, the first buckle 113 can be completely disengaged from the second buckle 213. During the removal process, there is no interaction between the first buckle 113 and the second buckle 213, so the second buckle 213 will not be damaged. In addition, as a preferred embodiment, the elastic force of the U-shaped elastic arm is easy to adjust. When adjusted to a suitable force, the cover 100 can be easily removed by hand or with general conventional tools. Moreover, by setting the locking member 110 to two and forming 180 degrees, this arrangement is very easy for the user to pinch and apply force, making the disassembly and assembly of the pencil sharpener tool holder assembly more convenient.

[0085] Optionally, the cover 100 can be reinstalled by pressing the cover, or by the user pinching the locking protrusion 111 and placing it down to the corresponding position and then releasing it, that is, performing the reverse operation of disassembling the cover to install the cover.

[0086] refer to Fig.17 It can be seen that in the locked state, the mounting member 360 can pass through the through hole 130 to achieve the installation of the cover part 100 and the tool part 300, and the mounting member 360 can provide support for the cover plate 120, and the mounting member 360 can limit the cover part 100 in the axial downward direction.

[0087] The tool holder mechanism can be used in conjunction with a conventional automatic pencil sharpener and has strong adaptability. Since the structure, transmission and matching relationship of other parts of the tool holder mechanism used in conjunction with the conventional automatic pencil sharpener are similar, they will not be described in detail.

[0088] Industrial Applicability

[0089] In summary, the utility model provides a pencil sharpener tool holder assembly. Through the structural design of the locking piece on the tool holder cover and the fixing piece on the support part, the locking piece includes an elastic structure that can move radially. After a little force is applied to the locking piece in the radial direction, the locking piece can be disengaged from the fixing piece. There will be no interaction force between the two during the removal process, and no damage will be caused to any parts. In addition, the structural design of the tool holder assembly makes it very smooth and simple for the user to grasp and apply force, and the user can complete the installation or removal of the tool holder assembly with one hand.

[0090] The structure has simple principle and structure, low cost, stability and reliability, strong adaptability, and effectively solves the problem of short service life of the pencil sharpener caused by the difficulty in removing the knife holder cover and easy damage.

[0091] 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.

[0092] 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 pencil sharpener tool holder assembly, arranged in an automatic pencil sharpener to cut pencils driven by a motor, characterized in that: The invention comprises: a cover portion (100), a support portion (200) and a tool portion (300), wherein the support portion (200) comprises a cavity, wherein at least a part of the tool portion (300) is accommodated in the cavity of the support portion (200), and the cover portion (100) and the tool portion (300) are both detachable relative to the support portion (200); during use, the tool portion (300) can rotate around the axis of the support portion (200); a locking member (110) is integrally provided along the circumferential direction of the cover portion (100); a fixing member (210) is integrally provided along the circumferential direction of the support portion (200); the locking member (110) and the fixing member (210) are positioned correspondingly; the locking member (110) can be deformed in the radial direction; and the cover portion (100) and the support portion (200) have two matching states: Locked state: in the locked state, the locking member (110) and the fixing member (210) are locked with each other, and the cover portion (100) and the supporting portion (200) are fixedly locked and connected, and the pencil sharpener can work normally; Unlocked state: In the unlocked state, the locking member (110) can be separated from the fixing member (210), so that the cover portion (100) can be removed from the supporting portion (200). At this time, the pencil sharpener is in a non-working state, and the tool portion (300) can be replaced.

2. The pencil sharpener tool holder assembly according to claim 1, characterized in that: The locking member (110) comprises a locking protrusion (111), an elastic member (112) and a first buckle (113); the locking protrusion (111) and the first buckle (113) are both fixedly connected to the elastic member (112); and by applying force to the locking protrusion (111), the elastic member (112) can be driven to deform radially, thereby driving the first buckle (113) to move radially.

3. The pencil sharpener tool holder assembly according to claim 2, characterized in that: The elastic member (112) is a U-shaped elastic arm.

4. The pencil sharpener tool holder assembly according to claim 2, characterized in that: The fixing member (210) comprises a second buckle (213), the second buckle (213) and the first buckle (113) are arranged in pairs, and the second buckle (213) can be buckled and locked together with the first buckle (113).

5. The pencil sharpener tool holder assembly according to claim 4, characterized in that: The tool part (300) comprises a pen entry hole (310), a cutting chamber (320), a transmission base (350), a tool holder (330) and a cutting tool (340); the part of the pencil to be cut enters the cutting chamber (320) through the pen entry hole (310); the front end of the cutting chamber (320) is tapered; the cutting tool (340) is fixedly arranged on the tool holder (330); the cutting surface of the cutting tool (340) can cut the pencil placed in the cutting chamber (320); the tool holder (330) is fixedly arranged on the transmission base (350); and the transmission base (350) can be connected with the motor power gear (90) for synchronous rotation.

6. The pencil sharpener tool holder assembly according to claim 5, characterized in that: The cutting tool (340) is a rolling cutter.

7. The pencil sharpener tool holder assembly according to claim 6, characterized in that: The number of the locking parts (110) and the fixing parts (210) is 2; the locking parts (110) are arranged at 180° relative to each other on both sides of the outer wall of the cover part (100); and the fixing parts (210) are arranged at 180° relative to each other on both sides of the inner wall of the support part (200).

8. The pencil sharpener tool holder assembly according to claim 3, characterized in that: The elastic member (112) comprises a first elastic arm (1121) and a second elastic arm (1122); the locking protrusion (111) is fixedly arranged at a middle position of the first elastic arm (1121) and the projection width of the locking protrusion (111) along the axial direction is smaller than the projection width of the first elastic arm (1121) along the axial direction; the first buckle (113) is arranged on both sides of the first elastic arm (1121) and is staggered with the locking protrusion (111) in the circumferential direction.

9. The pencil sharpener tool holder assembly according to claim 3, characterized in that: The lower surface of the locking protrusion (111) comprises a first guiding inclined surface (1111).

10. The pencil sharpener tool holder assembly according to any one of claims 1 to 9, characterized in that: The locking element (110) is made of plastic.

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