Knife rest assembly convenient to install and electric pencil sharpener

Abstract

The tool rest assembly convenient to install comprises a cover part, a supporting part and a tool part, and the distance from the top end of the lower wall of a cover part body to the top end of a blocking strip of the lower wall of the cover part body is H1; the length from the top ends of the first boss and the second boss to the top end of the support frame is H2; the first boss and the second boss are in paired connection with the first sliding groove and the second sliding groove to generate a deformation angle A; by increasing the lengths of H1 and H2, a consumer only needs to push the top of the supporting part into the matching cavity firstly and then carry out rotary matching in the process of installing the supporting part into the cover part, and the difficulty of replacing or cleaning the knife rest assembly by the consumer can be effectively reduced; the size of the first boss and the second boss participating in elastic deformation during rotation and buckle matching is longer, the deformation angle A is reduced, and a consumer can install the supporting part and the cover part with small screwing force.

Description

TECHNICAL FIELD

[0001] The patent relates to the field of electric pencil sharpener, and particularly to a cutter holder assembly and electric pencil sharpener which are convenient to install. BACKGROUND

[0002] In the conventional electric pencil sharpener, the advancing and retreating pencil assembly is detachable, and the structure comprises an advancing and retreating pencil assembly seat and a pencil sharpening assembly support frame. The distance from the bottom surface of the advancing and retreating pencil assembly seat to the bottom surface of the buckle boss is very short. The top surface of the pencil sharpening assembly support frame and the top surface of the buckle boss are on the same plane. Since the top of the pencil sharpening assembly support frame has no guiding structure, it is difficult for the consumer to align the outer cylinder of the support frame with the inner hole on the advancing and retreating pencil assembly seat during the process of installing the advancing and retreating pencil assembly into the pencil sharpening assembly, which is inconvenient to operate and can easily damage the pencil sharpener. In addition, since the distance from the bottom surface of the advancing and retreating pencil assembly seat to the bottom surface of the buckle boss is very short, the size of the adjacent position of the locking boss participating in elastic deformation is short during the process of rotating the advancing and retreating pencil assembly into the pencil sharpening assembly. Under the condition of the same thickness and the same locking depth, a large amount of tightening force is required to rotate the locking boss into the locking groove, which can easily damage the locking boss or the locking groove, seriously affecting the service life of the pencil sharpener and the consumer experience.

[0003] There is an urgent need for a cover closing guiding mechanism which is simple to process, low in cost, and convenient for consumers to quickly align the outer cylinder of the support frame with the inner hole on the advancing and retreating pencil assembly seat, and which is not easy to damage the locking boss or the locking groove, to solve the technical problems of the current cover closing operation inconvenience, the locking mechanism damage and short service life. CONTENT OF THE INVENTION

[0004] In order to solve the technical problems of the current cover closing operation inconvenience, the locking mechanism damage and short service life, the patent provides the following technical solutions:

[0005] First aspect: a cutter holder assembly which is convenient to install is provided, comprising a cover part, a support part and a cutter part, the cover part is arranged above the support part, the support part is a hollow structure for accommodating the cutter part, the cover part and the cutter part are detachable relative to the support part, and the cutter part can rotate around the axis of the support part during use; the cover part comprises a cover part main body, the cover part main body comprises a cover part main body lower wall, the cover part main body lower wall is enclosed to form a matched cavity, the cover part main body lower wall is provided with a first sliding groove and a second sliding groove, and the cover part main body lower wall is provided with a cover part main body lower wall blocking strip inwardly along the radial direction at the bottom end; the length from the top end of the cover part main body lower wall to the top end of the cover part main body lower wall blocking strip is H1; the support part comprises a support part top, and the support part top is provided with a first boss and a second boss; the length from the top end of the first boss and the second boss to the top end of the support frame is H2; the first boss, the second boss, the first sliding groove and the second sliding groove are connected in pairs to generate a deformation angle A, and A≤8°.

[0006] Further, H1>1.0mm, H1>1.4mm, H1>1.8mm, H1>2.2mm or H1>2.6mm; H2≥0.4mm, H2≥0.8mm, H2≥1.2mm, H2≥1.6mm or H2≥1.8mm.

[0007] Further, the cover part and the support part have a fully unlocked state and a fully locked state; in the fully unlocked state, the first boss can be separated from the first sliding groove, and the second boss can be separated from the second sliding groove, so that the cover part can be detached from the support part; in the fully locked state, the first boss is fully assembled with the first sliding groove, and the second boss is fully assembled with the second sliding groove, so that the cover part and the support part are fixedly locked and connected.

[0008] Further, the first boss includes a first boss front section resistance strip, a first boss front section sliding strip, a first boss groove, a first boss rear section sliding strip and a first boss rear section resistance strip; and the second boss includes a second boss front section resistance strip, a second boss front section sliding strip, a second boss groove, a second boss rear section sliding strip and a second boss rear section resistance strip.

[0009] Further, the first sliding groove includes a first sliding groove front section resistance strip, a first sliding groove front section sliding strip, a first sliding groove protrusion, a first sliding groove rear section sliding strip and a first sliding groove rear section resistance strip; and the second sliding groove includes a second sliding groove front section resistance strip, a second sliding groove front section sliding strip, a second sliding groove protrusion, a second sliding groove rear section sliding strip and a second sliding groove rear section resistance strip.

[0010] Further, the cover part further includes a cover plate, a cover plate through hole, a cover part safety lock rod, a locking part, a counter cavity and an annular extension piece; and the cover part main body further includes a partition layer, a cover part main body upper wall, a cover part main body upper cavity, a cover part main body through hole, and a cover part main body lower wall resistance strip.

[0011] Further, the support part further includes a support part base and a support part safety lock groove.

[0012] Further, the tool part includes a pen entry hole, a cutting cavity, a tool holder, a blade and a transmission base.

[0013] The second aspect provides a convenient-to-install electric pencil sharpener, which comprises the tool holder assembly.

[0014] The patent has the following beneficial effects:

[0015] 1. The patent provides a convenient tool holder assembly, comprising a cover part, a support part and a tool part, the cover part comprises a cover part main body, the cover part main body comprises a cover part main body lower wall, the cover part main body lower wall is enclosed into a matching cavity, the cover part main body lower wall is provided with a first sliding groove and a second sliding groove, and the bottom end of the cover part main body lower wall is provided with a cover part main body lower wall blocking strip in the radial direction; The length of the top end of the cover part main body lower wall from the top end of the cover part main body lower wall blocking strip is H1, H1>1.0mm; The support part comprises a support part top, and the support part top is provided with a first boss and a second boss; The length of the top end of the first boss and the second boss from the top end of the support frame is set as H2, H2≥0.4mm; The first boss, the second boss and the first sliding groove, the second sliding groove are matched and connected to produce a deformation angle A;

[0016] 2. By increasing the length of H1 and H2, the consumer only needs to push the support part top into the matching cavity first, and then rotate the first boss to align the first sliding groove and the second boss to align the second sliding groove during the process of installing the support part into the cover part, which can effectively reduce the difficulty of consumers replacing or cleaning the tool holder assembly;

[0017] 3. After increasing the length of H1 and H2, the first boss and the second boss participate in elastic deformation when rotating and buckling matching during the process of matching connection of the support part and the cover part in the matching cavity, so the deformation angle A is reduced, and the consumer can install the support part and the cover part with smaller tightening force. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the patent, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the patent, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the patent, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the patent, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0020] Figure 1 is a side view schematic diagram of the tool holder assembly;

[0021] Figure 2 is Figure 1 is a sectional view schematic diagram along A-A direction;

[0022] Figure 3 is Figure 2 is a sectional view schematic diagram along B-B direction;

[0023] Figure 4a side view of the cover portion;

[0024] Figure 4b perspective view of the cover portion from the top;

[0025] Figure 4c perspective view of the cover portion from the flip;

[0026] Figure 4d perspective view of the cover portion from the bottom;

[0027] Figure 5a side view of the support portion;

[0028] Figure 5b perspective view of the support portion from the top;

[0029] Figure 5c perspective view of the support portion from the bottom;

[0030] Figure 5d perspective view of the support portion from the flip;

[0031] Figure 6a perspective view of the cover portion main body from the bottom;

[0032] Figure 6b perspective view of the cover portion main body from the top;

[0033] Figure 6c perspective view of the cover portion main body from the flip;

[0034] Figure 7a side view of the cover portion main body;

[0035] Figure 7b top view of the cover portion main body;

[0036] Figure 8a side view of the cover portion main body;

[0037] Figure 8b Figure 8a cutaway view along the C-C direction;

[0038] Figure 8c Figure 8b cutaway view along the D-D direction;

[0039] Figure 9a perspective view of the support frame from the bottom;

[0040] Figure 9b perspective view of the support frame from the flip; ​​

[0041] Figure 9c A three-dimensional schematic diagram of the support frame from a top-down perspective;

[0042] Figure 10a This is a schematic side view of the support frame;

[0043] Figure 10b This is a schematic diagram of the support frame from below;

[0044] Figure 10c This is a schematic top view of the support frame;

[0045] Figure 11a This is a side view of the support frame from another angle.

[0046] Figure 11b for Figure 11c A schematic cross-sectional view along the FF direction;

[0047] Figure 11c for Figure 11a A schematic cross-sectional view along the EE direction;

[0048] Figure 12a A three-dimensional schematic diagram of the first assembly process of the support frame and the main body of the cover;

[0049] Figure 12b This is a three-dimensional schematic diagram of the second assembly process of the support frame and the main body of the cover.

[0050] Figure 12c This is a three-dimensional schematic diagram of the third assembly process of the support frame and the main body of the cover.

[0051] Figure 12d This is a three-dimensional schematic diagram of the fourth assembly process of the support frame and the main body of the cover.

[0052] Figure 13a This is a side view schematic diagram of the second assembly process of the support frame and the main body of the cover;

[0053] Figure 13b for Figure 13c A schematic cross-sectional view along the HH direction;

[0054] Figure 13c for Figure 13a A schematic cross-sectional view along the GG direction;

[0055] Figure 14a This is a side view schematic diagram of the third assembly process of the support frame and the main body of the cover;

[0056] Figure 14b for Figure 14c A schematic cross-sectional view along the JJ direction;

[0057] Figure 14c for Figure 14aSectional view along I-I direction;

[0058] Figure 15a Fourth assembly process side view of support frame and cover body;

[0059] Figure 15b Figure 15c Sectional view along L-L direction;

[0060] Figure 15c Figure 15a Sectional view along K-K direction;

[0061] Figure 16a Length relationship of L1, L2, D1, D2 of cover body bottom view; Figure 16b Length relationship of L1, L2, D1, D2 of support frame top view. Wherein, the following is the description of the reference numerals:

[0062] 100: cover

[0063] 110: cover plate

[0064] 120: cover plate through hole

[0065] 130: locking part

[0066] 140: cover body

[0067] 141: partition layer

[0068] 142: cover body through hole

[0069] 143: cover body upper wall

[0070] 144: cover body upper cavity

[0071] 145: cover body lower wall

[0072] 146: counter cavity

[0073] 147: cover body lower wall blocking strip

[0074] 150: annular extension piece

[0075] 160: first sliding groove

[0076] 161: first sliding groove front section blocking strip

[0077] 162: first sliding groove front section sliding strip

[0078] 163: first sliding groove protrusion

[0079] 164: first sliding groove rear section sliding strip

[0080] 165: first sliding groove rear section blocking strip​​

[0081] 170 second chute

[0082] 171 second chute front section stop bar

[0083] 172 second chute front section slide bar

[0084] 173 second chute protrusion

[0085] 174 second chute rear section slide bar

[0086] 175 second chute rear section stop bar

[0087] 180 cap safety lock bar

[0088] 200 support portion

[0089] 210 support frame

[0090] 211 support frame top portion

[0091] 220 first boss

[0092] 221 first boss front section stop bar

[0093] 222 first boss front section slide bar

[0094] 223 first boss recess

[0095] 224 first boss rear section slide bar

[0096] 225 first boss rear section stop bar

[0097] 230 second boss

[0098] 231 second boss front section stop bar

[0099] 232 second boss front section slide bar

[0100] 233 second boss recess

[0101] 234 second boss rear section slide bar

[0102] 235 second boss rear section stop bar

[0103] 240 support portion base

[0104] 250 support portion safety lock slot

[0105] 300 tool portion

[0106] 310 entry hole

[0107] 320 cutting cavity

[0108] 330: tool holder

[0109] 340: blade

[0110] 350: transmission base DETAILED DESCRIPTION

[0111] The detailed features and advantages of the present patent are described in detail in the following detailed description, which is sufficient for any person skilled in the art to understand the technical content of the present patent and to implement it, and the person skilled in the art can easily understand the purposes and advantages related to the present patent according to the description, claims and drawings disclosed in the present specification.

[0112] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0113] In the description of the present embodiment, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship defined with the coordinate reference of the drawings, and are only for the convenience of describing the present patent and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present patent.

[0114] The terms "first", "second", etc. are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0115] In order to make the purposes, technical solutions and advantages of the present patent more clear, the embodiments of the present patent will be further described in detail below in combination with the drawings.

[0116] Figure 1 is a schematic view of a side view of a tool holder assembly, Figure 1 The tool holder assembly in the present patent comprises, from top to bottom, a cover part 100, a support part 200 and a tool part 300, the cover part 100 is arranged above the support part 200, and the bottom of the cover part 100 and the top of the support part 200 are connected by screwing in and out to adjust the connection state of the cover part 100 and the support part 200, and the assembly connection of the cover part 100 and the support part 200 in the present patent has a unique assembly; the support part 200 is a hollow structure, and the middle cavity is used to accommodate the tool part 300.

[0117] Figures 4a-4d is a structural schematic view of the cover part 100, wherein Figure 4a is a schematic view of a side view of the cover part 100, the top of the cover part 100 is provided with a cover plate 110, and the cover plate 110 is provided below with a cover part main body 140. Figures 4b-4dAs a three-dimensional diagram of the cap 100 at different angles, the cover plate 110 is a circular planar structure, and the cover plate 110 includes a cap main body 140 at the center position. Before cutting, the pencil needs to enter the cap main body 140.

[0118] The cap main body 140 includes a middle partition layer 141, and the partition layer 141 includes a partition layer 141 through hole at the center position. The partition layer 141 through hole is provided with a locking portion 130 around the through hole. The locking portion 130 is a sawtooth structure, and the locking portion 130 is arranged along the circular shape of the through hole. After the pencil passes through the cap main body 140, the locking portion 130 locks the pencil. The partition layer 141 extends to both sides in the axial direction to form a cap main body upper wall 143 and a cap main body lower wall 145. The cap main body upper wall 143 and the cap main body lower wall 145 enclose a cap main body upper cavity 144 and a matching cavity 146 to accommodate other components. Specifically, the partition layer 141 extends upward in the axial direction to form the cap main body upper wall 143, and the cap main body upper wall 143 encloses the cap main body upper cavity 144. The partition layer 141 extends downward in the axial direction to form the cap main body lower wall 145, and the cap main body lower wall 145 encloses the matching cavity 146. The matching cavity 146 is used to accommodate the support frame top 211 and connect after pairing with the support frame top 211.

[0119] The cutter portion 300 includes a pencil entry hole 310, a cutting cavity 320, a cutter holder 330, a blade 340, and a transmission base 350. The pencil to be cut can enter the cutting cavity 320 through the pencil entry hole 310 for cutting. The blade 340 is fixed in the cutter holder 330 at a predetermined angle and position. The cutter holder 330 is fixed on the transmission base 350. The axis of the blade 340 is at an angle to the axis of the cutting cavity 320. It is easy to understand that by setting the angle, the cutting angle of the pencil can be controlled. The cutting cavity 320 is similar to the cutting cavity 320 in a conventional pencil sharpener. The upper part is a cylinder, and the lower part is a cone. The side of the cone part has an opening. A part of the blade 340 extends into the cutting cavity 320 through the side opening to form a cutting surface to cut the pencil. The transmission base 350 includes a through hole in the middle, and the through hole includes a rib. Through the through hole structure, the motor power gear can be engaged to achieve motor power transmission. Since such a cutting cavity 320 and the cooperation of the motor and the cutter portion 300 belong to a relatively common structure, further description is omitted.

[0120] Figures 5a-5dFor the support part 200 different angle perspective view, support part 200 includes support frame 210, first boss 220, second boss 230 and support part base 240. Support frame 210 is provided above the support part base 240, support frame 210 is a hollow cylindrical support, support frame 210 side wall is provided with three rectangular holes, that is, through the support frame 210 can be directly seen cutter part 300; support frame top 211 outer wall is provided with first boss 220 and second boss 230 on the opposite side along the circumferential direction.

[0121] Figures 6a-8c For the structure of the cover part main body 140 schematic diagram, Figures 6a-6c For the cover part main body 140 perspective view, easy to see, cover part main body 140 upper cavity volume is greater than the matching cavity 146, and the cover part main body 140 wall front section is provided with annular extension piece 150 along the circumferential direction.

[0122] Figures 7a-7b For the cover part main body 140 bottom view and top view, to facilitate the determination of the position relationship of each component.

[0123] Figures 8a-8c For the cover part main body 140 side view and cross section view, wherein, into the first sliding groove 160 and the second sliding groove 170 are long strip like inner recess structure and the first sliding groove 160 and the second sliding groove 170 can be deformed under stress. The first sliding groove 160 includes the first sliding groove front section resistance bar 161, the first sliding groove front section sliding bar 162, the first sliding groove convex 163, the first sliding groove rear section sliding bar 164, the first sliding groove rear section resistance bar 165, the front and rear ends of the first sliding groove 160 are provided with short line resistance bar along the radial direction, the resistance bar is used to prevent the sliding of the first boss 220, the first sliding groove 160 is provided with long line sliding bar along the circumferential direction, the sliding bar provides the circumferential sliding path for the first boss 220, the first sliding groove front section sliding bar 162 and the first sliding groove rear section sliding bar 164 are provided with the first sliding groove convex 163, the first sliding groove convex 163 locks the first boss 220 after the first boss 220 stops sliding. The second sliding groove 170 includes the second sliding groove front section resistance bar 171, the second sliding groove front section sliding bar 172, the second sliding groove convex, the second sliding groove rear section sliding bar 174, the second sliding groove rear section resistance bar 175, the front and rear ends of the second sliding groove 170 are provided with short line resistance bar along the radial direction, the resistance bar is used to prevent the sliding of the second boss 230, the second sliding groove 170 is provided with long line sliding bar along the circumferential direction, the sliding bar provides the circumferential sliding path for the second boss 230, the second sliding groove front section sliding bar 172 and the second sliding groove rear section sliding bar 174 are provided with the second sliding groove convex, the second sliding groove convex locks the second boss 230 after the second boss 230 stops sliding. The bottom end of the cover part main body lower wall 145 is provided with the cover part main body lower wall resistance bar 152, the cover part main body lower wall resistance bar 152 is used to prevent the downward movement of the support frame top 211 along the axial direction.

[0124] Figures 9a-11c For the structure diagram of the support frame 210, from Figures 9a-9c It can be seen that the basic frame of the support frame 210, in particular, the support frame top 211 is circumferentially oppositely provided with a first boss 220 and a second boss 230.

[0125] Figures 10a-10c It can be seen that the specific structure of the first boss 220 and the second boss 230, the first boss 220 is a long strip-shaped convex structure with a small groove in the middle, and the first boss 220 and the second boss 230 can be deformed. Specifically, the first boss 220 includes a first boss front section resistance strip 221, a first boss front section sliding strip 222, a first boss groove 223, a first boss rear section sliding strip 224, and a first boss rear section resistance strip 225. The first boss front section resistance strip 221 cannot continue to slide in the circumferential direction after touching the first sliding groove front section resistance strip 161, the first boss front section sliding strip 222 moves within the first sliding groove front section sliding strip 162 and the first sliding groove rear section sliding strip 164, the first boss rear section sliding strip 224 moves within the first sliding groove rear section sliding strip 164, and the first sliding groove protrusion 163 prevents the first boss 220 from continuing to slide by being inserted into the first boss groove 223. The second boss 230 includes a second boss front section resistance strip 231, a second boss front section sliding strip 232, a second boss groove 233, a second boss rear section sliding strip 234, and a second boss rear section resistance strip 235. The second boss front section resistance strip 231 cannot continue to slide in the circumferential direction after touching the second sliding groove front section resistance strip 171, the second boss front section sliding strip 232 moves within the second sliding groove front section sliding strip 172 and the second sliding groove rear section sliding strip 174, the second boss rear section sliding strip 234 moves within the second sliding groove rear section sliding strip 174, and the second sliding groove protrusion prevents the second boss 230 from continuing to slide by being inserted into the second boss groove 233.

[0126] Unique assembly

[0127] The first boss 220 and the first chute 160, the second boss 230 and the second chute 170 have unique assembly. The first boss groove 223 and the first chute protrusion 163 can be completely blocked; the width of the first boss front section stopper 221 is equal to the width of the first chute front section stopper 161, and the width of the first boss rear section stopper 225 is equal to the width of the first chute rear section stopper 165; the length of the first boss front section sliding strip 222 is equal to the length of the first chute front section sliding strip 162, and the length of the first boss rear section sliding strip 224 is equal to the length of the first chute rear section sliding strip 164; the length of the second boss front section sliding strip 232 is equal to the length of the second chute front section sliding strip 172, and the length of the second boss rear section sliding strip 234 is equal to the length of the second chute rear section sliding strip 174; the width of the second boss front section stopper 231 is equal to the width of the second chute front section stopper 171, and the width of the second boss rear section stopper 235 is equal to the width of the second chute rear section stopper 175; the second boss groove 233 and the second chute protrusion can be completely blocked. Projecting the first chute front section sliding strip 162 and the first chute rear section sliding strip 164 along the radial direction into a straight line L1, L1 is also the length of the straight line projected along the radial direction of the first boss front section sliding strip 222 and the first boss rear section sliding strip 224; projecting the second chute front section sliding strip 172 and the second chute rear section sliding strip 174 along the radial direction into a straight line L2, L2 is also the length of the straight line projected along the radial direction of the second boss front section sliding strip 232 and the second boss rear section sliding strip 234. Specifically, L1>L2. Projecting the first chute front section stopper 161 or the first chute rear section stopper 165 along the radial direction into a straight line D1, D1 is also the width of the straight line projected along the radial direction of the first boss front section stopper 221 or the first boss rear section stopper 225; projecting the second chute front section stopper 171 and the second chute rear section stopper 175 along the radial direction into a straight line D2, D2 is also the width of the straight line projected along the radial direction of the second boss front section stopper 231 or the second boss rear section stopper 235. Specifically, D1<D2.

[0128] When assembling, the support frame 210 is screwed into the matching cavity 146, only the first boss 220 can be completely matched with the first chute 160, and only the second boss 230 can be completely matched with the second chute 170. If the first boss 220 moves to the second chute 170, at this time the first boss 220 is too long and too small in width relative to the second chute 170, and the matching fails; if the second boss 230 moves to the first chute 160, at this time the second boss 230 is too short and too large in width relative to the first chute 160, and the matching fails.

[0129] The support part 200 side wall is provided with a support part safety lock slot 250, and a safety switch is arranged in the support part safety lock slot 250. The cover part 100 bottom end side is provided with a cover part safety lock rod 180. In addition to the cooperation of the abovementioned boss and sliding slot, the support part safety lock slot 250 and the cover part safety lock rod 180 also need to be uniquely matched to normally start the pencil sharpener, or the electric pencil sharpener cannot rotate after the cover part 100 and the support part 200 are separated.

[0130] Convenient installation

[0131] The cover part main body 140 is provided with a first sliding slot 160 and a second sliding slot 170 opposite each other in the circumferential direction. The distance between the cover part main body lower wall 145 top end and the cover plate 110 main body lower wall block top end is H1, and the distance H1 is greater than 1 mm. The support frame top part 211 is provided with a first boss 220 and a second boss 230 opposite each other in the circumferential direction. The distance between the first boss 220 and the second boss 230 and the support frame 210 top end is H2, and the distance H2 is greater than 1 mm. In particular, the distances H1 and H2 are different from the settings of other knife holder assemblies. When the boss of the support frame top part 211 enters the matching cavity 146 and is connected with the sliding slot, the settings of the distances H1 and H2 enable the support frame top part 211 to enter the matching cavity 146 deeply. At this time, the deformation angle A generated by the matching connection of the boss and the sliding slot is smaller than the deformation angle generated in the assembly process of other knife holder assemblies. Therefore, the force used by the matching sliding slot and the boss is smaller, that is, the force applied by the matching of the cover part main body 140 and the support frame 210 is smaller, and thus more labor-saving.

[0132] Assembly process

[0133] The cover part 100 and the support part 200 have a completely unlocked state and a completely locked state.

[0134] Completely unlocked state: In the completely unlocked state, the first boss 220 can be separated from the first sliding slot 160, and the second boss 230 can be separated from the second sliding slot 170, so that the cover part 100 can be detached from the support part 200;

[0135] Completely locked state: In the completely locked state, the first boss 220 is completely assembled with the first sliding slot 160, and the second boss 230 is completely assembled with the second sliding slot 170. At this time, the cover part 100 and the support part 200 are fixedly locked and connected.

[0136] Figures 12a-15c The structure diagram of the different matching states of the cover part main body 140 and the support frame 210.

[0137] Figures 12a-12d The four assembly process perspective diagrams of the cover part main body 140 and the support frame 210 changing from the completely unlocked state to the completely locked state.

[0138] Figure 12aFor the first assembly process of the support frame 210 and the cover body 140, the support frame 210 and the cover body 140 need to be completely disassembled and separated. The center of the support frame 210 and the center of the cover body 140 need to be aligned in the axial direction, so that the center of the support frame 210 and the center of the cover body 140 are on the same axis.

[0139] Figure 12b For the second assembly process of the support frame 210 and the cover body 140, the support frame 210 is moved towards the cover body 140 in the axial direction, so that the top 211 of the support frame is ready to enter the mating cavity 146. At this time, if the first boss 220 and the second boss 230 do not enter the first groove or the second groove, the top surface of the first boss 220 and the second boss 230 will be stuck at the bottom end of the mating cavity 146 and cannot enter. Figures 13a-13c For the second assembly process, the support frame 210 is moved towards the cover body 140 in the axial direction, so that the top 211 of the support frame is ready to enter the mating cavity 146. At this time, if the first boss 220 and the second boss 230 do not enter the first groove or the second groove, the top surface of the first boss 220 and the second boss 230 will be stuck at the bottom end of the mating cavity 146 and cannot enter.

[0140] Figure 12c For the third assembly process of the support frame 210 and the cover body 140, the first boss 220 and the second boss 230 enter the mating cavity 146. At this time, if the first boss 220 and the second boss 230 on the support frame 210 do not completely match the first sliding groove 160 and the second sliding groove 170, the first boss 220 and the second boss 230 on the support frame 210 will be stuck and cannot be rotated in. Figures 14a-14c For the third assembly process, after the first boss 220 and the second boss 230 enter the mating cavity 146, if the first boss 220 and the second boss 230 on the support frame 210 do not completely match the first sliding groove 160 and the second sliding groove 170, the first boss 220 and the second boss 230 on the support frame 210 will be stuck and cannot be rotated in.

[0141] Figure 12d For the fourth assembly process of the support frame 210 and the cover body 140, the first boss 220 and the second boss 230 enter the mating cavity 146. At this time, if the first boss 220 and the second boss 230 on the support frame 210 do not completely match the first sliding groove 160 and the second sliding groove 170, the first boss 220 and the second boss 230 on the support frame 210 will be stuck and cannot be rotated in. Figures 15a-15c For the fourth assembly process, at this time, the first boss 220 completely matches the first sliding groove 160, and the second boss 230 completely matches the second sliding groove 170. The support frame 210 and the cover body 140 are changed to a completely locked state, and the support frame 210 and the cover body 140 are locked and connected.

[0142] Industrial application

[0143] In summary, the patent provides a uniquely assembled tool holder assembly, including a cover part, a support part 200 and a tool part, which has unique assembly, specifically: using the first boss, the second boss and the first sliding groove, the second sliding groove width and depth size difference design principle, provides a uniquely assembled tool holder assembly, only when the first sliding groove and the first boss are connected, the second sliding groove and the second boss are connected, the support part can be automatically buckled in the first boss and the second boss under the action of gravity. If the first boss moves to the second sliding groove, the first boss is too long and too small in width relative to the second sliding groove, and the pairing fails; if the second boss moves to the first sliding groove, the second boss is too short and too large in width relative to the first sliding groove, and the pairing fails, thereby achieving the purpose of preventing mistakes and simplifying the operation process.

[0144] The principle and structure of the structure are simple, the cost is low, it is stable and reliable, and the adaptability is strong, and the problems of difficult removal of the tool holder cover and short service life of the pencil sharpener caused by easy damage are effectively solved.

[0145] The terms and expressions used here are only used for description, and the patent should not be limited to these terms and expressions. The use of these terms and expressions does not mean the exclusion of any equivalent features of the description (or part thereof), and it should be recognized that various modifications that can exist should also be included in the scope of the claims. Other modifications, changes and replacements can also exist. Accordingly, the claims should be considered to cover all these equivalents.

[0146] Similarly, it should be pointed out that although the patent has been described with reference to the current specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate the patent, and various equivalent changes or replacements can be made without departing from the spirit of the patent, therefore, any changes, modifications of the above embodiments within the scope of the spirit of the patent will fall within the scope of the claims of the patent.

Claims

1. A quick and easy to install tool holder assembly, characterized in that, The utility model provides a pen sharpener, including cover, support and cutter, the cover sets up above the support, the support is hollow structure for accommodating the cutter, the cover and the cutter are relative to the support can be detached, in the use process, the cutter can rotate around the axis of the support; The cover includes a cover body, the cover body includes a cover body lower wall, the cover body lower wall is enclosed into a matching cavity, the cover body lower wall is provided with a first sliding groove and a second sliding groove, and a cover body lower wall blocking strip is arranged at the bottom end of the cover body lower wall in the radial direction; The length from the top end of the cover body lower wall to the top end of the cover body lower wall blocking strip is H1; The support includes a support top, and the support top is provided with a first boss and a second boss; The length from the top end of the first boss and the second boss to the top end of the support frame is H2; The first boss, the second boss and the first sliding groove and the second sliding groove are connected in pairs to generate a deformation angle A, and A is less than or equal to 8 degrees.

2. The knife carriage assembly of claim 1, wherein, H1 is greater than 1.0 mm, H1 is greater than 1.4 mm, H1 is greater than 1.8 mm, H1 is greater than 2.2 mm or H1 is greater than 2.6 mm; H2 is greater than or equal to 0.4 mm, H2 is greater than or equal to 0.8 mm, H2 is greater than or equal to 1.2 mm, H2 is greater than or equal to 1.6 mm or H2 is greater than or equal to 1.8 mm.

3. The knife holder assembly of claim 1, wherein, The cover and the support have a completely unlocked state and a completely locked state; In the completely unlocked state, the first boss can be separated from the first sliding groove, and the second boss can be separated from the second sliding groove, so that the cover can be detached from the support; In the completely locked state, the first boss is completely assembled with the first sliding groove, and the second boss is completely assembled with the second sliding groove, so that the cover is fixedly connected with the support.

4. The knife holder assembly of claim 1, wherein, The first boss includes a first boss front segment blocking strip, a first boss front segment sliding strip, a first boss groove, a first boss rear segment sliding strip and a first boss rear segment blocking strip. The second boss includes a second boss front segment blocking strip, a second boss front segment sliding strip, a second boss groove, a second boss rear segment sliding strip and a second boss rear segment blocking strip.

5. The knife holder assembly of claim 3, wherein, The first sliding groove includes a first sliding groove front segment blocking strip, a first sliding groove front segment sliding strip, a first sliding groove protrusion, a first sliding groove rear segment sliding strip and a first sliding groove rear segment blocking strip. The second sliding groove includes a second sliding groove front segment blocking strip, a second sliding groove front segment sliding strip, a second sliding groove protrusion, a second sliding groove rear segment sliding strip and a second sliding groove rear segment blocking strip.

6. The knife carriage assembly of claim 1, wherein, The cover further includes a cover plate, a cover plate through hole, a cover safety lock rod, a locking portion, a matching cavity and an annular extension piece. The cover body further includes a partition layer, a cover body upper wall, a cover body upper cavity, a cover body through hole and a cover body lower wall blocking strip.

7. The knife carriage assembly of claim 1, wherein, The support further includes a support base and a support safety lock groove.

8. The knife carriage assembly of claim 1, wherein, The cutter includes a pen entry hole, a cutting cavity, a cutter holder, a cutting tool and a transmission base.

9. A portable electric pen sharpener comprising the cutter holder assembly according to any one of claims 1 to 8.

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