CN207630832U - A kind of electric pencil-sharpening unit - Google Patents

Abstract

The utility model provides a kind of electric pencil-sharpening unit, belongs to field of mechanical technique.It solves the problems, such as that existing electric pencil-sharpening unit can not be automatically powered off in the when of falling chip dust.This electric pencil-sharpening unit includes casing, power connection is fixed on casing, electric pencil-sharpening unit further includes a pedestal, casing is placed on pedestal, power connector is fixed on pedestal, power connector is electrically connected with power connection, and being equipped between casing and pedestal makes casing and the circumferentially fixed location structure of pedestal.It has many advantages, such as to automatically power off in the when of falling chip dust, ensures normal working performance.

Description

A kind of electric pencil-sharpening unit

Technical field

The utility model belongs to field of mechanical technique, is related to a kind of electric pencil-sharpening unit.

Background technology

Electric pencil-sharpening unit is also electro-motion pencil sharpener, it is that office very common in office or daily learning life is literary Tool, in today that rhythm of life is constantly accelerated, people increasingly pursue convenience and high efficiency, and electric pencil-sharpening unit is because have energy It is enough that the function of automatic planing is carried out to pencil and is widely used by people.Occur currently on the market diversiform Electric pencil-sharpening unit, but its common structure generally comprises casing, is installed in casing by putting penholder, planing component and control plane Cut the penknife core of the motor form of component operation.And for the power supply mode of motor, electric pencil-sharpening unit is divided into be supplied using battery Electricity and connection power supply power supply two ways, more convenient, but volume is used using the electric pencil-sharpening unit that battery is powered It is larger；Although and use connection power supply power supply electric pencil-sharpening unit small volume, using when need user first to connect power supply.Cause This, people often carry out selection according to the demand of itself.

It is essentially all the fixed electricity in the casing of electric pencil-sharpening unit for the electric pencil-sharpening unit using connection power supply power supply Then source connector is correspondingly arranged power supply connecting hole in the side of casing, the connector of power supply is inserted into electricity when planing pencil It is formed and is connected with power connection in the connecting hole of source, to provide electric power to motor to drive planing component to start pencil of planing.This There is a shortcomings for the mode of kind connection power supply：It needs to outwell the chip dust of generation after pencil has been planed, in pen It needs to dismantle casing when bits, component of planing in this state is directly exposed, and user is after the completion of planing It can usually forget to pull up the connector of power supply, motor is caused to be in energized state always, so may will hurt use Family.Currently, being already provided with the structure that can realize automatic circuit break function in other field such as electric kettle, it mainly will Split structure is made in electric kettle, including water kettle body and a pedestal, water kettle body are placed on pedestal and form electricity It connects to heat up water, just realizes and automatically power off when water kettle body is taken away from pedestal.But due to field and real work The difference of situation influences whether electro-motion pencil sharpener if this structure is directly applied to realization in electro-motion pencil sharpener and is concluded automatically Normal working performance.It is stationary that this is mainly due to electric kettles when heating up water, and electro-motion pencil sharpener is at work It can vibrate, vibration can cause electrical connection when split settings by large effect and can not ensure normally planing property Can, therefore will not select to set electro-motion pencil sharpener to split structure to automatically power off to realize.

Invention content

The purpose of this utility model is in view of the above-mentioned problems existing in the prior art, it is proposed that a kind of electric pencil-sharpening unit, institute Technical problems to be solved are how to ensure normal working performance while realization automatically powers off.

The purpose of this utility model can be realized by following technical proposal：

A kind of electric pencil-sharpening unit, including casing are fixed with power connection on the casing, which is characterized in that electronic to cut Device further includes a pedestal, and casing is placed on pedestal, and power connector, power supply connection are fixed on the pedestal Head is electrically connected with power connection, and being equipped between the casing and pedestal makes casing and the circumferentially fixed location structure of pedestal.

When needing planing pencil, casing is placed on pedestal, and ensures that power connector is electrically connected with power connection, makes electricity The electric power in source can be conveyed to penknife core by power connector, to make penknife core plane pencil.It has planed At the when of falling chip dust is needed, directly casing is picked up from pedestal, then casing is dismantled to the work that can carry out down chip dust, it is intermediate No longer need to carry out the cut-out of power supply, this is mainly due to power connector after casing is picked up from pedestal and power connection are automatic In discrete state, and after being disconnected being electrically connected of power connector and power connection, even if power supply can not pulling up power supply yet It transmits electric power again to penknife core, to realize automatically powering off for the when of falling chip dust.

Simultaneously as what penknife core was planed particular by motor offer driving force, then holding in planing The vibration of entire electric pencil-sharpening unit, casing is easily caused to be located on pedestal again, pedestal is placed in plane and without fixed structure, Casing will produce the vibration radial and circumferential relative to pedestal before this when planing in this way, then final by the transmission of vibration again Pedestal is set to vibrate together.Casing is equivalent to be applied with one on casing in the radial play in circumferential direction of pedestal makes casing Relative to the twisting resistance of base rotation, and since power connector is electrically connected with power connection, although power connector is fixed Need the regular hour poor on casing, but since casing forms resonance with pedestal by the transmission of vibration, the torsion Power will act directly on power connector, consequently, it is possible to power connector is caused situations such as tilting or being bent occur, Also or make to react on power connection in casing and the position of power connection is made to deviate, and influence power supply The connective stability of connector and power connection occurs connecting not with power connection because of power connector after causing long-time use Accident power-off caused by stabilization when normal work.For such case, location structure is arranged to make machine in this electric pencil-sharpening unit Shell forms circumferentially fixed, to resonate with pedestal generation using the location structure elimination casing time difference with pedestal, and casing is made to generate The moment of vibration can drive pedestal to rotate together, turned round caused by the radial play in circumferential direction of pedestal with eliminating casing Turn power, improve the stability that is electrically connected of power connector and power connection, ensures the normal working performance of electric pencil-sharpening unit.

In above-mentioned electric pencil-sharpening unit, the location structure include from the positioning head of base upper surface edge protrusion with And it is set to the positioning groove of bottom of shell, the positioning head is embedded in positioning groove.

This electric pencil-sharpening unit is arranged positioning groove on casing, is embedded by positioning head by the way that positioning head is arranged on pedestal The location structure between casing and pedestal is constituted in positioning groove, with prevent casing due to vibration relative to the radial direction of pedestal and Circumferentially there is play, casing is consequently formed resonance with pedestal, is inserted into power supply connecting hole to improve power connector Stability prevents from causing accident of the pencil in planing when disconnected because realization automatically powers off while realizing that the when of falling and consider to be worth doing automatically powers off Electricity ensure that the normal planing of electric pencil-sharpening unit.

In above-mentioned electric pencil-sharpening unit, the casing includes bottom cover and lower housing, the lower ending opening of lower housing, bottom Lid is connected to the lower end of lower housing and the closure of openings by lower housing, penknife core are fixed on bottom cover, and positioning groove includes setting The groove one for being placed in bottom cover bottom and the groove two for being set to lower housing bottom, groove one are connected with groove two, and described determines Potential head is simultaneously in embedded groove one and groove two.

Since positioning groove includes groove one and groove two, groove one is located on bottom cover, and groove two is located on lower housing, bottom Lid is directly mutually fixed with penknife core and is connected to the opening of lower housing, and the vibration of penknife core is first reacted on bottom cover, It is transmitted on lower housing by bottom cover again, then it is circumferential solid so that bottom cover is formed with pedestal when positioning head is embedded into groove one Fixed, thus, it is possible to same bottom covers to form synchronous vibration for pedestal, while positioning head one is also embedded into lower housing, then pedestal, bottom cover And lower housing just all forms synchronous vibration, it is therefore prevented that the whole radial direction relative to pedestal of casing and circumferential play, in profit It can with making the vibration of penknife core be influenced caused by power connector while adding pedestal and automatically powered off when bits to realize down It is weakened significantly, the normal working performance of electric pencil-sharpening unit is made to be guaranteed.

In above-mentioned electric pencil-sharpening unit, the lower housing includes the left shell half and right half-shell of arc-shaped plate, left Half-shell is mutually fixed with right half-shell by fastener, and the lower end inside of lower housing has annular shoulder block, the outside tool of the bottom cover There are annular flange, the lower face of the annular flange to be resisted against on the upper surface of annular shoulder block.

In assembly, penknife core is fixed on bottom cover, and then the outside of penknife core is wrapped to left shell half and right half-shell Get up and utilizes fastener by left shell half and right half-shell.After left shell half connects into lower housing with right half-shell, in the lower end of lower housing Inside can form annular shoulder block, and the annular flange on bottom cover is just resisted against on annular shoulder block, such bottom cover just and lower housing Connection is formed, the substep for realizing penknife core in this way transmits, then is formed with positioning groove with positioning head is closed Location structure, so that it may so that location structure is transmitted to vibration force on casing to eliminate when the vibration of penknife core, solve to realize The technical barrier faced when the automatic circuit break function for the when of falling chip dust.

In above-mentioned electric pencil-sharpening unit, the upper surface of the positioning head is the cambered surface of evagination.

Set the upper surface of positioning head to the cambered surface of evagination, the cambered surface of evagination, which can play, makes positioning head be embedded into positioning Guiding role in groove, though when casing is put on pedestal positioning head not with the complete face of positioning groove, but in machine It can make positioning groove that positioning head be imported into positioning groove along the upper surface slide of positioning head under the gravity of shell itself It is interior.

In above-mentioned electric pencil-sharpening unit, as another technical solution, the location structure includes being set to casing The cross section of connecting cavity at bottom centre and raised auxiliary section from pedestal upper end center, auxiliary section is non-circular, is connected Connect chamber shape is identical as auxiliary section and auxiliary section insertion connecting cavity in.

The positioning knot for using cross section to be made of non-circular auxiliary section and shape connecting cavity identical with auxiliary section Structure is equally also possible to prevent casing and play occurs relative to the radial direction of pedestal and circumferentially due to vibration, realizes casing and pedestal Synchronous vibration, to improve power connector and power connection connective stability because caused by realizing and fall automatically powering off when considering to be worth doing The problem of difference.

In above-mentioned electric pencil-sharpening unit, fixture block is fixed in the casing, the upper end of fixture block offers card downwards Slot, bottom of shell are equipped with power supply connecting hole, and card slot is connected with power supply connecting hole, and power connection is located in card slot, casing it is interior Wall has the stopper section of protrusion, and stopper section is resisted against the upper end of power connection.

Power connection is stuck in the card slot of fixture block, power connector is upward through power supply connecting hole and is inserted into power supply and connects Upward active force can be caused to power connection when in head, in order to avoid the active force releases power connection outside card slot, therefore The stopper section of protrusion is set on the inner wall of casing, is resisted against the upper end of power connection using stopper section to be formed to power connection Backstop makes power connection be limited in card slot, thus power connection is firmly fixed, and can improve power connection in this way The reliability being connect with power connector, when avoiding because bits are realized down in power supply connecting hole setting to bottom of shell from dynamic circuit breaker Electricity and caused by power connection stress problem, ensure that the position of power connection is not in offset, improved and power supply with this The connective stability of connector ensures the normal working performance of electric pencil-sharpening unit.

Power connection is fixed using welding or the modes such as glue although occurring in the prior art, solder joint or Glue abutting edge is all easy therefore power connection and is broken by the reaction force that power connector applies, therefore fixed effect Fruit is not so good as to use card slot and stopper section.

In above-mentioned electric pencil-sharpening unit, there is positioning column and plush copper in the pedestal, the bottom of positioning column, which is equipped with, determines Position hole, base upper surface are equipped with the delivery outlet being connected with location hole, and power connector has the positioning region being in the form of a column, positioning region In location hole, positioning region is equipped with export head and export head passes through delivery outlet and is connected with power connection, positioning region Bottom has pillar, and there is matching hole, pillar are embedded in the plush copper in matching hole.

Power connector is realized and is electrically connected by the way that export head is connected with power connection, since pillar is located at positioning region Bottom after pillar is embedded into the matching hole in plush copper Nei, can position axial position of the power connector in pedestal, Ensure that power connector will not generate axial displacement in pedestal because of the radial-play of casing, is realizing pen using pedestal While automatic circuit break function when bits, the stability that the export head of power connector is inserted into power supply connecting hole ensure that.

In above-mentioned electric pencil-sharpening unit, the positioning column side has resigning breach one, pedestal side tool There are resigning breach two, the power connector that there is interconnecting piece, interconnecting piece to be connected to the side of positioning region, power connector Input head is located at interconnecting piece side, and interconnecting piece sequentially passes through resigning breach one, resigning breach two and stretches out pedestal side, and connects Side wall of the side wall in portion with resigning breach one and resigning breach two leans, and the interconnecting piece side of power connector is equipped with input Head and input head be located at outside pedestal side.

Resigning breach one is set in positioning column side, resigning breach two is set in pedestal side, makes the company of power connector Socket part sequentially passes through resigning breach one, resigning breach two and stretches out pedestal side, due to interconnecting piece side wall and resigning breach One and the side wall of resigning breach two lean, then the effect by resigning breach one and resigning breach two so that interconnecting piece is consolidated Fixed, power connector is circumferentially fixed in pedestal to realizing, then mixes axial restraint of the power connector in pedestal And synchronous vibration of the casing relative to pedestal, the export head for further improving power connector are inserted into power supply connecting hole Stability, this guarantees using pedestal realize the when of falling chip dust automatic circuit break function reliability.

Compared with prior art, power supply connecting hole is arranged in the bottom of casing this electric pencil-sharpening unit, and adds charged The pedestal of connector is matched with casing, and by casing, when being picked up on pedestal, power connector divides with the automatic of power supply connecting hole From the automatic circuit break function for realizing the when of falling chip dust；Meanwhile location structure is set between casing and pedestal, utilize location structure Position after being placed on pedestal to casing positions, and prevents casing relative to the play of the radial direction of pedestal and circumferential direction, realizes Resonance between casing and pedestal while using adding pedestal and being automatically powered off when bits to realize down eliminates penknife core and shakes The dynamic influence caused by power connector.

Description of the drawings

Fig. 1 is the schematic diagram of this electric pencil-sharpening unit.

Fig. 2 is the sectional view of this electric pencil-sharpening unit.

Fig. 3 is the partial enlarged view at power connector in Fig. 2.

Fig. 4 is the partial enlarged view at positioning head in Fig. 2.

Fig. 5 is the schematic diagram of casing in this electric pencil-sharpening unit.

Fig. 6 is the schematic diagram of pedestal in this electric pencil-sharpening unit.

Fig. 7 is the schematic diagram of casing when lower housing is locally split in this electric pencil-sharpening unit.

Fig. 8 is the explosive view of casing in this electric pencil-sharpening unit.

Fig. 9 is the explosion sectional view of pedestal in this electric pencil-sharpening unit.

Figure 10 is the schematic diagram of the pedestal of pedestal in this electric pencil-sharpening unit.

Figure 11 is the schematic diagram of power connector in this electric pencil-sharpening unit.

Figure 12 is the schematic diagram of bottom cover in this electric pencil-sharpening unit.

In figure, 1, casing；1a, upper shell；1b, lower housing；1b1, left shell half；1b11, stopper section；1b2, right half-shell； 1b21, groove two；1b3, annular shoulder block；1c, bottom cover；1c1, power supply connecting hole；1c2, groove one；1c3, annular flange；1c4、 Resigning chamber；1d, positioning groove；2, penknife core；3, pedestal；3a, pedestal；3a1, delivery outlet；3a2, positioning head；3a3, stepping down lacks Mouth two, 3a4, cyclic annular protrusion；3a5, positioning column；3a51, location hole；3a52, resigning breach one；3a6, mounting post；3a7, it is fitted into Portion；3a71, relief hole；3b, bottom plate；3b1, plush copper；3b11, matching hole；3b2, mounting head；4, power connector；4a, output Head；4b, input head；4c, positioning region；4d, interconnecting piece；4e, pillar；5, power connection；6, fixture block；6a, card slot；6b, buckling parts.

Specific implementation mode

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

Embodiment one

As shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 7 and Fig. 8, a kind of electric pencil-sharpening unit, including casing 1 and be set in casing 1 Penknife core 2, casing 1 from top to bottom successively include upper shell 1a, lower housing 1b and bottom cover 1c, the lower end of lower housing 1b is opened Mouthful, bottom cover 1c is connected to the lower end of lower housing 1b and by the closure of openings of lower housing 1b, and the top of penknife core 2 is located at upper shell In 1a, the lower part of penknife core 2 is located in lower housing 1b, and the lower end of penknife core 2 has several connecting poles, penknife core 2 with For bottom cover 1c by mutually being fixed across bottom cover 1c and the fastener that penetrates in connecting pole, the concrete structure of penknife core 2 can refer to this Applicant it is proposed that cross application No. is the movements of 201610438307.9 electric pencil-sharpening unit.In the present embodiment, lower housing 1b is formed by connecting by the left shell half 1b1 and right half-shell 1b2 of arc-shaped plate by fastener, has convex annular on the outside of bottom cover 1c The lower end inside of edge 1c3, lower housing 1b have annular convex shoulder, and the lower face of annular flange 1c3 is resisted against the upper end of annular convex shoulder On face.

Such as Fig. 3 and as shown in figure 12, fixture block 6 is fixed on bottom cover 1c, the upper end of fixture block 6 offers downwards card slot 6a, card Card has power connection 5 in slot 6a, and the shape of card slot 6a is identical as the shape of power connection 5, has on the inner wall of left shell half 1b1 convex The stopper section 1b11 gone out, stopper section 1b11 are resisted against the upper end of power connection 5.In the present embodiment, bottom cover 1c uses plastics system At fixture block 6 is an integral structure with bottom cover 1c；It is in block to have two buckling parts 6b, two buckling parts 6b at the upper port of card slot 6a It shape and is oppositely arranged, side opposite two buckling parts 6b is inclined surface, and the inclined direction of two inclined surface is opposite and two inclined surface The distance between gradually increase from top to bottom, two buckling parts 6b are resisted against the upper end of power connection 5.

As shown in Fig. 2, Fig. 3, Fig. 8, Fig. 9 and Figure 10, electric pencil-sharpening unit further includes a pedestal 3, and casing 1 is resisted against pedestal 3 On, power connector 4 is fixed in pedestal 3, power connector 4 includes input head 4b and export head 4a, is provided on bottom cover 1c There are power supply connecting hole 1c1, power supply connecting hole 1c1 to be connected with the card slot 6a on fixture block 6, the export head 4a of power connector 4 stretches Go out the upper surface of pedestal 3, and the export head 4a of power connector 4 passes through power connector 4 and is connected with power connection 5, electricity The input head 4b of source connector 4 stretches out 3 side of pedestal.Pedestal 3 includes the bottom plate 3b and pedestal 3a being connected on bottom plate 3b, seat There is cavity, the roof of cavity to have cyclic annular protrusion 3a4, have several mounting post 3a6 on ring-type protrusion 3a4 for the bottom of body 3a, It is corresponding on bottom plate 3b that there is several mounting head 3b2, mounting post 3a6 to be resisted against on mounting head 3b2, bottom plate 3b and pedestal 3a by from The bottoms bottom plate 3b pass through mounting head 3b2 and the fastener penetrated in mounting post 3a6 is connected.

As shown in Fig. 9, Figure 10 and Figure 11, there is positioning column 3a5 on ring-type protrusion 3a4, have from positioning on positioning column 3a5 There is the sides resigning breach one 3a52, pedestal 3a to pass through for the side the location hole 3a51 that the bottom of column 3a5 opens up upwards, positioning column 3a5 It is equipped with delivery outlet 3a1 equipped with two 3a3 of resigning breach, pedestal 3a, delivery outlet 3a1 is connected with location hole 3a51.Power supply connects The first 4 interconnecting piece 4d for having the positioning region 4c being in the form of a column and being connected to the positioning region sides 4c, positioning region 4c are located at positioning column 3a5 It is interior, and interconnecting piece 4d sequentially passes through one 3a52 of resigning breach, two 3a3 of resigning breach and stretches out the sides pedestal 3a, export head 4a In on the 4c of positioning region and export head 4a is stretched out from delivery outlet 3a1, input head 4b is located on interconnecting piece 4d.On power connector 4 also It is located at the bottom of positioning region 4c with pillar 4e, pillar 4e, there is plush copper 3b1 on bottom cover 1c, there is matching hole on plush copper 3b1 In 3b11, pillar 4e insertion matching holes 3b11.It is realized by pillar 4e and plush copper 3b1 and positioning region 4c and positioning column 3a5 Axial restraint of the power connector 4 in pedestal 3, while further through interconnecting piece 4d and one 3a52 of resigning breach and resigning breach two The cooperation of 3a3 realizes the circumferentially fixed of power connector 4, to casing 1 place on the base 3 when ensure export head 4a with Power supply connecting hole 1c1's stablizes cooperation.

As shown in Figure 4, Figure 5, Figure 6 and Figure 7, have between pedestal 3 and casing 1 when export head 4a is inserted into power supply connecting hole The location structure for being held in position casing 1 when in 1c1, location structure include the positioning head from the upper surfaces pedestal 3a edge protrusion The upper surface of 3a2 and the positioning groove 1d on casing 1, positioning head 3a2 are the cambered surface of evagination, the shape of positioning groove 1d It is identical as positioning head 3a2.In the present embodiment, positioning groove 1d includes one 1c2 of groove and two 1b21 of groove, groove one 1c2 In on bottom cover 1c, two 1b21 of groove is located on lower housing 1b, and one 1c2 of groove is connected with two 1b21 of groove, when casing 1 is resisted against When on pedestal 3, in positioning head 3a2 insertion one 1c2 of groove and two 1b21 of groove.

As shown in Figure 5 and Figure 6, in the present embodiment, there is resigning chamber 1c4, the seat of pedestal 3 at the bottom centre of bottom cover 1c The shape of raised fitting portion 3a7 on body 3a, fitting portion 3a7 are identical as the shape of resigning chamber 1c4, fitting portion 3a7 insertions In resigning chamber 1c4, relief hole 3a71 is equipped on fitting portion 3a7.The cooperation of resigning chamber 1c4 and fitting portion 3a7 can also be one Determine the positioning of realization bottom cover 1c in degree, while the adjusting rod in penknife core 2 can extend in resigning chamber 1c4, it is embedding in order to prevent Conjunction portion 3a7 is fitted in resigning chamber 1c4 and is impacted to the stretching of adjusting rod, and relief hole 3a71 is arranged on fitting portion 3a7, makes The end of adjusting rod is located in relief hole 3a71, to avoid interfering.

When needing planing pencil, casing 1 is placed on the base 3, and ensure that the export head 4a of power connector 4 can be inserted Enter into power supply connecting hole 1c1 and be connected with power connection 5, then forms the input head 4b of power connector 4 with power supply Connection, enables the electric power of power supply to be conveyed to penknife core 2 by power connector 4, to make penknife core 2 carry out pencil Planing.Planing is completed to need the when of falling chip dust, directly picks up casing 1 from pedestal 3, then dismantles casing 1 to fall The work of chip dust, centre no longer need to carry out power supply cut-out, this is mainly due to after casing 1 is picked up from pedestal 3 power supply connect The export head 4a of connector 4 is in discrete state automatically with power connection 6, and is disconnected the export head 4a and electricity of power connector 4 After the electrical connection of source connector 6, even if power supply can not transmit electric power to penknife core 2 again if not pulling up power supply, to realize down Automatically powering off when chip dust.

In addition, what penknife core 2 was planed particular by motor offer driving force, then being easy to draw in planing The vibration of entire electric pencil-sharpening unit is played, casing 1 is located on pedestal 3 again, and pedestal 3 is inherently placed to be kept on the table Motionless, casing 1 will produce the play radial and circumferential relative to pedestal 3 when planing in this way.Due to the output of power connector 4 Head 4a is inserted into power supply connecting hole 1c1, then casing 1 is by the play of pedestal 3 radially will be by power supply connecting hole 1c1 It acts on the export head 4a of power connector 4, the export head 4a of power connector 4 is caused the feelings such as tilt or be bent occur Condition, and the connective stability of power connector 4 and power supply connecting hole power connection 6 is influenced, occur after causing long-time use Because power connector 4 connect with power connection 6 it is unstable caused by accident power-off.

For the above situation, this electric pencil-sharpening unit by being arranged positioning head 3a2 on the base 3, and setting positioning is recessed on casing 1 Slot 1d is embedded into the location structure constituted in positioning groove 1d between casing 1 and pedestal 3, to prevent casing by positioning head 3a2 1 there is play due to vibration relative to the radial direction of pedestal 3 and circumferentially, and thus casing 1 is formed with pedestal 3 and resonated, to improve The export head 4a of power connector 4 is inserted into the stability in power supply connecting hole 1c1, while realizing that the when of falling and consider to be worth doing automatically powers off It prevents from causing accident power-off of the pencil in planing when because realization automatically powers off, ensure that the normal planing of electric pencil-sharpening unit.

Moreover, because positioning groove 1d includes one 1c2 of groove and two 1b21 of groove, one 1c2 of groove is located on bottom cover 1c, recessed Two 1b21 of slot is located on lower housing 1b, and bottom cover 1c is that the opening of lower housing 1b is directly fixed and be connected to 2 phase of penknife core, The vibration of penknife core 2 is first reacted on bottom cover 1c, then is transmitted on lower housing 1b by bottom cover 1c, then embedding in positioning head 3a2 So that bottom cover 1c is formed with pedestal 3 when entering into one 1c2 of groove circumferentially fixed, being total to for bottom cover 1c and pedestal 3 is realized with this It shakes.Meanwhile positioning head 3a2 is also embedded into two 1b21 of groove, so that lower housing 1b is also formed simultaneously with pedestal 3 circumferentially fixed, that Pedestal 3, bottom cover 1c and lower housing 1b just form synchronous vibration, it is therefore prevented that the whole radial direction relative to pedestal 3 of casing 1 And circumferential play, so that the vibration of penknife core 2 is connected power supply while using adding pedestal 3 and being automatically powered off when bits to realize down It influences to be weakened significantly caused by connector 4, the normal working performance of electric pencil-sharpening unit is made to be guaranteed.

Embodiment two

The present embodiment is essentially identical with the structure and principle of embodiment one, the difference is that：In the present embodiment, it positions Structure includes being set to the auxiliary section of protrusion at 3 upper end center of the connecting cavity at 1 bottom centre of casing and pedestal, auxiliary section Cross section is non-circular, and the shape of connecting cavity is identical as auxiliary section and auxiliary section is embedded in connecting cavity.

The positioning knot for using cross section to be made of non-circular auxiliary section and shape connecting cavity identical with auxiliary section Structure can also equally realize that play occurs in the radial direction for preventing casing 1 due to vibration relative to pedestal 3, fall to consider to be worth doing because realizing to improve When automatically power off caused by power connector 4 and power connection 5 connective stability difference problem.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims (9)

1. a kind of electric pencil-sharpening unit, including casing (1), power connection (5) is fixed on the casing (1), which is characterized in that Electric pencil-sharpening unit further includes a pedestal (3), and casing (1) is placed on pedestal (3), and power supply company is fixed on the pedestal (3) Connector (4), the power connector (4) are electrically connected with power connection (5), are equipped between the casing (1) and pedestal (3) Make casing (1) and the circumferentially fixed location structure of pedestal (3).

2. electric pencil-sharpening unit according to claim 1, which is characterized in that the location structure includes from pedestal (3) The positioning head (3a2) of Surface Edge edge protrusion and the positioning groove (1d) for being set to casing (1) bottom, the positioning head In (3a2) embedded positioning groove (1d).

3. electric pencil-sharpening unit according to claim 2, which is characterized in that the casing (1) include bottom cover (1c) and Lower housing (1b), the lower ending opening of lower housing (1b), bottom cover (1c) are connected to the lower end of lower housing (1b) and by lower housing (1b) Closure of openings, be equipped with penknife core (2) in casing (1) and penknife core (2) be fixed on bottom cover (1c), positioning groove (1d) Including the groove one (1c2) for being set to the bottom bottom cover (1c) and the groove two (1b21) for being set to the bottom lower housing (1b), groove One (1c2) is connected with groove two (1b21), the positioning head (3a2) while embedded groove one (1c2) and groove two In (1b21).

4. electric pencil-sharpening unit according to claim 3, which is characterized in that the lower housing (1b) includes arc-shaped plate The left shell half (1b1) of shape and right half-shell (1b2), left shell half (1b1) are mutually fixed with right half-shell (1b2) by fastener, lower housing The lower end inside of (1b) has annular shoulder block (1b3), and the outside of the bottom cover (1c) has annular flange (1c3), described The lower face of annular flange (1c3) is resisted against on the upper surface of annular shoulder block (1b3).

5. according to the electric pencil-sharpening unit described in Claims 2 or 3 or 4, which is characterized in that the upper table of the positioning head (3a2) Face is the cambered surface of evagination.

6. electric pencil-sharpening unit according to claim 1, which is characterized in that the location structure includes being set to casing (1) cross section of the connecting cavity at bottom centre and raised auxiliary section from pedestal (3) upper end center, auxiliary section is not rounded The shape of shape, connecting cavity is identical as auxiliary section and auxiliary section is embedded in connecting cavity.

7. electric pencil-sharpening unit according to claim 1, which is characterized in that it is fixed with fixture block (6) in the casing (1), The upper end of fixture block (6) offers card slot (6a) downwards, and casing (1) bottom is equipped with power supply connecting hole (1c1), card slot (6a) and electricity Source connecting hole (1c1) is connected, and power connection (5) is located in card slot (6a), and the inner wall of casing (1) has the stopper section of protrusion (1b11), stopper section (1b11) are resisted against the upper end of power connection (5).

8. electric pencil-sharpening unit according to claim 1, which is characterized in that have positioning column (3a5) in the pedestal (3) It is equipped with location hole (3a51) with the bottom of plush copper (3b1), positioning column (3a5), pedestal (3) upper surface is equipped with and location hole (3a51) The delivery outlet (3a1) being connected, power connector (4) have the positioning region (4c) being in the form of a column, and positioning region (4c) is located at location hole In (3a51), positioning region (4c) be equipped with export head (4a) and export head (4a) pass through delivery outlet (3a1) and with power connection (5) It is connected, the bottom of positioning region (4c) has pillar (4e), has matching hole (3b11), pillar in the plush copper (3b1) In (4e) embedded matching hole (3b11).

9. electric pencil-sharpening unit according to claim 8, which is characterized in that described side positioning column (3a5), which has, steps down There is resigning breach two (3a3), the power connector (4) to have connection for notch one (3a52), the pedestal (3) side Portion (4d), interconnecting piece (4d) are connected to the side of positioning region (4c), and the input head (4b) of power connector (4) is located at interconnecting piece The side (4d), interconnecting piece (4d) sequentially pass through resigning breach one (3a52), resigning breach two (3a3) and stretch out pedestal (3) side, And side wall of the side wall of interconnecting piece (4d) with resigning breach one (3a52) and resigning breach two (3a3) leans, power supply connection Side interconnecting piece (4d) of head (4) is equipped with input head (4b) and input head (4b) is located at outside pedestal (3) side.