Uniquely assembled knife rest assembly and electric pencil sharpener

Abstract

The utility model provides a knife rest assembly with unique assembly, which comprises a cover part, a supporting part and a knife part, and has unique assembly performance, specifically, the knife rest assembly with unique assembly is provided by utilizing the width and depth dimension differentiation design principle of a first boss, a second boss, a first sliding chute and a second sliding chute; only when the first sliding groove is connected with the first boss in a matched mode and the second sliding groove is connected with the second boss in a matched mode, the supporting part can automatically enable the first sliding groove and the second sliding groove to be 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 pairing fails; if the second boss moves to the first sliding groove, the second boss is too short in length and too wide relative to the first sliding groove, and pairing fails, so that the purposes of fool proofing and operation process simplification are achieved. The utility model further provides a uniquely-assembled electric pencil sharpener.

Description

TECHNICAL FIELD

[0001] The present patent relates to the field of electric pencil sharpener, in particular to a uniquely assembled knife holder assembly and electric pencil sharpener. BACKGROUND

[0002] At present, the full-automatic electric pencil sharpener with separable advance and retreat pencil assembly is more and more common, that is, the consumer can take off and reassemble the advance and retreat pencil assembly during use, which can facilitate garbage disposal or replacement of the knife holder assembly (see Figure One ). The most common structure of the connection between the advance and retreat pencil assembly and the pencil sharpening assembly is that a pair of identical buckle grooves on the advance and retreat pencil assembly seat and a pair of identical buckle bosses corresponding designed on the support frame are used to realize the connection. During use, the consumer needs to deliberately align the buckle grooves on the advance and retreat pencil assembly with the corresponding buckle bosses on the pencil sharpening assembly to complete the correct assembly. If the corresponding sequence is misaligned, the pencil sharpening function cannot be realized after assembly, or the buckle structure is damaged and the pencil sharpener is damaged.

[0003] The buckle structure of the existing conventional advance and retreat pencil assembly separable pencil sharpener is generally that the buckle boss and the buckle groove in each position are identical in size, and during assembly of the advance and retreat pencil assembly into the pencil sharpening assembly, the buckle boss in any position can be assembled into the buckle groove in any position. This easily causes misalignment of the direction of the advance and retreat pencil assembly, which cannot normally start the pencil sharpening function, the consumer uses it very inconveniently, and seriously affects the use experience. Or only one group is assembled, and the other group is not assembled, which damages the buckle structure when the advance and retreat pencil assembly is twisted, thereby affecting the service life of the pencil sharpener.

[0004] There is an urgent need for a foolproof, simple-to-operate and low-cost anti-misrotation structure that does not require the consumer to deliberately align the buckle boss and the buckle groove when replacing the advance and retreat pencil assembly, and can ensure that the buckle boss and the buckle groove cannot be misaligned, to solve the technical problems of the current cover buckle position not easy to align, inconvenient operation, buckle rotation mechanism easy to damage and short service life. CONTENT OF THE INVENTION

[0005] In order to solve the technical problems of the current cover buckle position not easy to align, inconvenient operation, buckle rotation mechanism easy to damage and short service life, the present patent provides the following technical solutions:

[0006] The first aspect provides a uniquely assembled tool holder assembly, comprising a cover part, a support part and a tool part, the cover part is arranged above the support part, the support part is a hollow structure for accommodating the tool part, the cover part and the tool part are detachable relative to the support part, and the tool 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 into a matched cavity, and the cover part main body lower wall is provided with a first sliding groove and a second sliding groove; the support part comprises a support part top, and the support part top is provided with a first boss and a second boss; the tool holder assembly has unique assembly, and the unique assembly specifically shows that the first sliding groove can be connected with the first boss only in a matched mode, and the second sliding groove can be connected with the second boss only in a matched mode.

[0007] Further, the cover part and the support part 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 part can be detached from the support part; 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 part is fixedly connected with the support part.

[0008] Further, the first boss comprises 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 comprises 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 comprises 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 comprises 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 first sliding groove front section sliding strip and the first sliding groove rear section sliding strip are projected into a straight line L1 along a radial direction, and L1 is also the length of the straight line projected by the first boss front section sliding strip and the first boss rear section sliding strip along the radial direction; the second sliding groove front section sliding strip and the second sliding groove rear section sliding strip are projected into a straight line L2 along the radial direction, and L2 is also the length of the straight line projected by the second boss front section sliding strip and the second boss rear section sliding strip along the radial direction; wherein L1>L2.

[0011] Further, the first chute front section stopper or the first chute rear section stopper is projected in a radial direction into a straight line D1, that is, D1 is also the width of the first boss front section stopper or the first boss rear section stopper projected in a radial direction; the second chute front section stopper and the second chute rear section stopper are projected in a radial direction into a straight line D2, that is, D2 is also the width of the second boss front section stopper or the second boss rear section stopper projected in a radial direction; wherein D1 < D2.

[0012] Further, the cover part further comprises 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; the cover part main body further comprises a partition layer, a cover part main body upper wall, a cover part main body upper cavity, a cover part main body through hole, a cover part main body lower wall stopper.

[0013] Further, the support part further comprises a support part base and a support part safety lock groove.

[0014] Further, the cutter part comprises a pen entry hole, a cutting cavity, a cutter holder, a blade and a transmission base.

[0015] The second aspect: to provide a uniquely assembled electric pencil sharpener, the cutter holder assembly described above.

[0016] The patent has the following beneficial effects:

[0017] 1. Utilizing the first boss, the second boss and the first chute, the second chute, the width and depth size difference design principle, provides a uniquely assembled cutter holder assembly, only when the first chute and the first boss are connected in pairs, the second chute and the second boss are connected in pairs, 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 chute, at this time, the first boss is too long and too small in width relative to the second chute, and the pairing fails; if the second boss moves to the first chute, at this time, the second boss is too short and too large in width relative to the first chute, and the pairing fails, thereby achieving the purpose of preventing mistakes;

[0018] 2. The width and depth size of the conventional boss and the chute are optimized and adjusted, which does not increase the difficulty of product and mold structure, nor increase the material and processing cost, so as to achieve the purposes of not easy to damage, prolong the service life and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the patent embodiment, the following will briefly introduce the drawings needed to be used in the embodiment, it should be understood that the following drawings only show some embodiments of the patent, therefore should not be regarded as the limitation to the scope, for the ordinary skilled in the art, on the premise of not paying the creative labor, other related drawings can also be obtained according to these drawings.

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

[0021] Figure 2 is a side view of the tool holder assembly; Figure 1 is a cross-sectional view along the direction of A-A;

[0022] Figure 3 is a side view of the tool holder assembly; Figure 2 is a cross-sectional view along the direction of B-B;

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

[0024] Figure 4b is a perspective view of the cover part from the top angle;

[0025] Figure 4c is a perspective view of the cover part from the flip angle;

[0026] Figure 4d is a perspective view of the cover part from the bottom angle;

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

[0028] Figure 5b is a perspective view of the support part from the top angle;

[0029] Figure 5c is a perspective view of the support part from the bottom angle;

[0030] Figure 5d is a perspective view of the support part from the flip angle;

[0031] Figure 6a is a perspective view of the cover part body from the bottom angle;

[0032] Figure 6b is a perspective view of the cover part body from the top angle;

[0033] Figure 6c is a perspective view of the cover part body from the flip angle;

[0034] Figure 7a is a side view of the cover part body;

[0035] Figure 7b is a top view of the cover part body;

[0036] Figure 8a is a side view of the cover part body;

[0037] Figure 8b is a side view of the tool holder assembly; Figure 8a is a cross-sectional view along the direction of C-C;

[0038] Figure 8cFor Figure 8b Cross-sectional view along the direction of D-D;

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

[0040] Figure 9b Schematic perspective view of the support frame from the angle of view of the upside-down;

[0041] Figure 9c Schematic perspective view of the support frame from the angle of view of the top;

[0042] Figure 10a Schematic perspective view of the support frame from the angle of view of the side;

[0043] Figure 10b Schematic perspective view of the support frame from the angle of view of the bottom;

[0044] Figure 10c Schematic perspective view of the support frame from the angle of view of the top;

[0045] Figure 11a Schematic perspective view of the support frame from the angle of view of the side;

[0046] Figure 11b For Figure 11c Cross-sectional view along the direction of F-F;

[0047] Figure 11c For Figure 11a Cross-sectional view along the direction of E-E;

[0048] Figure 12a Schematic perspective view of the support frame and the cover body during the first assembly process;

[0049] Figure 12b Schematic perspective view of the support frame and the cover body during the second assembly process;

[0050] Figure 12c Schematic perspective view of the support frame and the cover body during the third assembly process;

[0051] Figure 12d Schematic perspective view of the support frame and the cover body during the fourth assembly process;

[0052] Figure 13a Schematic perspective view of the support frame and the cover body during the second assembly process from the angle of view of the side;

[0053] Figure 13b For Figure 13c Cross-sectional view along the direction of H-H;

[0054] Figure 13c For Figure 13a Cross-sectional view along the direction of G-G;

[0055] Figure 14aSupport frame and cover body third assembly process side view schematic diagram;

[0056] Figure 14b Support frame and cover body third assembly process side view schematic diagram; Figure 14c J-J direction cross-sectional view schematic diagram;

[0057] Figure 14c Support frame and cover body third assembly process side view schematic diagram; Figure 14a I-I direction cross-sectional view schematic diagram;

[0058] Figure 15a Support frame and cover body fourth assembly process side view schematic diagram;

[0059] Figure 15b Support frame and cover body fourth assembly process side view schematic diagram; Figure 15c L-L direction cross-sectional view schematic diagram;

[0060] Figure 15c Support frame and cover body fourth assembly process side view schematic diagram; Figure 15a K-K direction cross-sectional view schematic diagram;

[0061] Figure 16a Cover body bottom view L1, L2, D1, D2 length relationship; Figure 16b Support frame top view L1, L2, D1, D2 length relationship. Wherein, the following figure mark description:

[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: matching 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 chute front section slide strip

[0078] 163: first chute protrusion

[0079] 164: first chute rear section slide strip

[0080] 165: first chute rear section stopper strip

[0081] 170: second chute

[0082] 171: second chute front section stopper strip

[0083] 172: second chute front section slide strip

[0084] 173: second chute protrusion

[0085] 174: second chute rear section slide strip

[0086] 175: second chute rear section stopper strip

[0087] 180: cover safety lock rod

[0088] 200: support portion

[0089] 210: support frame

[0090] 211: support frame top portion

[0091] 220: first boss

[0092] 221: first boss front section stopper strip

[0093] 222: first boss front section slide strip

[0094] 223: first boss groove

[0095] 224: first boss rear section slide strip

[0096] 225: first boss rear section stopper strip

[0097] 230: second boss

[0098] 231: second boss front section stopper strip

[0099] 232: second boss front section slide strip

[0100] 233: second boss groove

[0101] 234: second boss rear section slide strip

[0102] 235: second boss rear section stopper strip

[0103] 240: support portion base

[0104] 250: support part safety lock groove

[0105] 300: tool part

[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 detailed description below, which are sufficient for any person skilled in the art to understand the technical content of the present patent and to implement it, and according to the description, claims and drawings disclosed in the specification, a person skilled in the art can easily understand the purposes and advantages related to the present patent.

[0112] It should be noted that in this specification, similar 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" and the like indicate the orientation or positional relationship defined with reference to the coordinates 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", and the like are only used to distinguish the 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 with reference to the drawings.

[0116] Figure 1 is a schematic view of a tool holder assembly side view, Figure 1 The tool holder assembly in the above-mentioned includes in order 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 schematic view of the structure of the cap portion 100, wherein Figure 4a is a schematic view of the side view of the cap portion 100, wherein the cap portion 100 is provided with a cap plate 110 at the top, and the cap portion main body 140 and the cap portion safety lock rod 180 are provided below the cap plate 110. Figures 4b-4d is a schematic view of the cap portion 100 from different angles, wherein the cap plate 110 is a circular planar structure, and the cap plate 110 is provided with the cap portion main body 140 at the center position. Before cutting, the pencil needs to enter the cap portion main body 140.

[0118] The cap portion main body 140 comprises a middle partition layer 141, the partition layer 141 is provided with a partition layer 141 through hole at the center position, and 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 is arranged along the circular shape of the through hole. After the pencil passes through the cap portion main body 140, the pencil is clamped and locked by the locking portion 130. Based on the partition layer 141, the cap portion main body upper wall 143 and the cap portion main body lower wall 145 are extended to both sides in the axial direction, and the cap portion main body upper wall 143 and the cap portion main body lower wall 145 are enclosed to form two cavities, i.e., the cap portion main body upper cavity 144 and the matched cavity 146, for accommodating other components. Specifically, based on the partition layer 141, the cap portion main body upper wall 143 is provided upward in the axial direction, and the cap portion main body upper wall 143 is enclosed to form the cap portion main body upper cavity 144. Based on the partition layer 141, the cap portion main body lower wall 145 is provided downward in the axial direction, and the cap portion main body lower wall 145 is enclosed to form the matched cavity 146. The matched cavity 146 is used to accommodate the support frame top portion 211 and is connected after being matched with the support frame top portion 211.

[0119] The cutter portion 300 comprises 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 enters the cutting cavity 320 through the pencil entry hole 310 to be cut. 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 a certain angle with 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 the 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 comprises a through hole in the middle, and the through hole comprises a rib. Through the through hole structure, the motor power gear can be engaged to realize the transmission of the motor power. 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-5dThe support part 200 includes a support frame 210, a first boss 220, a second boss 230, a support part base 240, and a support part safety lock groove 250. The support frame 210 is disposed above the support part base 240. The support frame 210 is a hollow cylindrical support frame. Three rectangular through holes are provided on the side wall of the support frame 210, so that the tool part 300 can be directly seen through the support frame 210. The first boss 220 and the second boss 230 are oppositely disposed on the outer wall of the top 211 of the support frame 210 in the circumferential direction.

[0121] Figures 6a-8c The structure of the cover part main body 140 is shown in the figure. Figures 6a-6c The cover part main body 140 is shown in the figure. It can be easily seen that the volume of the upper cavity of the cover part main body 140 is larger than that of the matched cavity 146. An annular extension piece 150 is provided on the front section of the upper wall of the cover part main body 140 in the circumferential direction.

[0122] Figures 7a-7b The bottom view and the top view of the cover part main body 140 are shown in the figures, which facilitate the determination of the positional relationship of the components.

[0123] Figures 8a-8c The side view and the sectional view of the cover part main body 140 are shown in the figures. The first sliding groove 160 and the second sliding groove 170 are long and concave in structure and can be deformed under stress. The first sliding groove 160 includes a first sliding groove front section resistance strip 161, a first sliding groove front section sliding strip 162, a first sliding groove protrusion 163, a first sliding groove rear section sliding strip 164, and a first sliding groove rear section resistance strip 165. Resistance strips in the form of short lines are provided on the front and rear ends of the first sliding groove 160 in the radial direction. The resistance strips are used to prevent the sliding of the first boss 220. Sliding strips in the form of long lines are provided on the first sliding groove 160 in the circumferential direction. The sliding strips provide a circumferential sliding path for the first boss 220. The first sliding groove protrusion 163 is provided between the first sliding groove front section sliding strip 162 and the first sliding groove rear section sliding strip 164. The first sliding groove protrusion 163 locks the first boss 220 after the first boss 220 stops sliding. The second sliding groove 170 includes a second sliding groove front section resistance strip 171, a second sliding groove front section sliding strip 172, a second sliding groove protrusion, a second sliding groove rear section sliding strip 174, and a second sliding groove rear section resistance strip 175. Resistance strips in the form of short lines are provided on the front and rear ends of the second sliding groove 170 in the radial direction. The resistance strips are used to prevent the sliding of the second boss 230. Sliding strips in the form of long lines are provided on the second sliding groove 170 in the circumferential direction. The sliding strips provide a circumferential sliding path for the second boss 230. The second sliding groove protrusion is provided between the second sliding groove front section sliding strip 172 and the second sliding groove rear section sliding strip 174. The second sliding groove protrusion locks the second boss 230 after the second boss 230 stops sliding. The bottom end of the lower wall 145 of the cover part main body is provided with a cover part main body lower wall resistance strip 152. The cover part main body lower wall resistance strip 152 is used to prevent the downward movement of the top 211 of the support frame 210 in the axial direction.

[0124] Figures 9a-11c For the structure 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 opposite to the first boss 220 and the 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 length between the cover part main body lower wall top end and the cover part main body lower wall block 147 top end is H1, and the distance H1 is >1mm. 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 length between the first boss 220 and the second boss 230 and the support frame 210 top end is H2, and the distance H2 is >1mm. 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 it is 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, and 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 located 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 part 211 of the support frame is ready to enter the matching 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 matching 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 part 211 of the support frame is ready to enter the matching 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 matching 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 matching 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 matching 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. The matching connection of the first boss, the second boss, the first sliding groove, and the second sliding groove produces a deformation angle A, and A≤8°;

[0141] The length from the top end of the lower wall of the cover body to the top end of the lower wall of the cover body is H1, and the length from the top end of the first boss and the second boss to the top end of the support frame is H2. H1>1.0mm; H2≥0.4mm.

[0142] 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 matching 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 matching cavity 146 and cannot enter; 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.

[0143] Industrial application

[0144] 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.

[0145] 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.

[0146] 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.

[0147] Similarly, it should be noted 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 uniquely assembled tool holder assembly characterized by, The tool holder assembly comprises a cover part, a support part and a tool part, the cover part is arranged above the support part, the support part is a hollow structure for accommodating the tool part, the cover part and the tool part are detachable relative to the support part, and the tool part can rotate around the axis of the support part during use. The cover part comprises a cover part body, the cover part body comprises a cover part body lower wall, the cover part body lower wall is enclosed to form a matching cavity, and the cover part body lower wall is provided with a first sliding groove and a second sliding groove. The support part comprises a support part top, and the support part top is provided with a first boss and a second boss. The tool holder assembly has a unique assembly, which is specifically manifested as: the first sliding groove can only be connected with the first boss in pairs, and the second sliding groove can only be connected with the second boss in pairs.

2. The knife carriage assembly of claim 1, wherein, The cover part and the support part 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, the second boss can be separated from the second sliding groove, and the cover part can be detached from the support part. 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 part and the support part are fixedly locked and connected.

3. The knife holder assembly of claim 1, wherein, The first boss comprises 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. The second boss comprises 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.

4. The knife holder assembly of claim 3, wherein, The first sliding groove comprises 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. The second sliding groove comprises 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.

5. The knife carriage assembly of claim 4, wherein, The first sliding groove front section sliding strip and the first sliding groove rear section sliding strip are projected along the radial direction to form a straight line L1, and L1 is also the length of the straight line projected along the radial direction of the first boss front section sliding strip and the first boss rear section sliding strip. The second sliding groove front section sliding strip and the second sliding groove rear section sliding strip are projected along the radial direction to form a straight line L2, and L2 is also the length of the straight line projected along the radial direction of the second boss front section sliding strip and the second boss rear section sliding strip; wherein L1>L2.

6. The knife carriage assembly of claim 5, wherein, The first sliding groove front section resistance strip or the first sliding groove rear section resistance strip is projected along the radial direction to form a straight line D1, and D1 is also the width of the first boss front section resistance strip or the first boss rear section resistance strip projected along the radial direction. The second sliding groove front section resistance strip and the second sliding groove rear section resistance strip are projected along the radial direction to form a straight line D2, and D2 is also the width of the second boss front section resistance strip or the second boss rear section resistance strip projected along the radial direction; wherein D1<D2.

7. The knife carriage assembly of claim 1, wherein, The cover part further comprises 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; The cover part main body further comprises 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 baffle.

8. The knife carriage assembly of claim 1, wherein, The support part further comprises a support part base and a support part safety lock groove.

9. The knife carriage assembly of claim 1, wherein, The cutter part comprises a pen entry hole, a cutting cavity, a cutter holder, a blade and a transmission base.

10. A uniquely assembled electric pencil sharpener comprising the cutter assembly of any one of claims 1 to 9.

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