CN217197615U

CN217197615U - Reciprocating type material moving mechanism applied to handheld 3D drawing device

Info

Publication number: CN217197615U
Application number: CN202220746331.XU
Authority: CN
Inventors: 魏宏辉
Original assignee: Jiangsu Haoyu Electronic Technology Co ltd
Current assignee: Jiangsu Haoyu Electronic Technology Co ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-08-16
Anticipated expiration: 2032-04-01

Abstract

Be applied to reciprocating type material moving mechanism of handheld 3D drawing device, it is applicable to and carries solid consumptive material forward in the transfer passage of handheld 3D drawing device so that it reaches the heating position and be melted in order to be used for drawing 3D works, it includes the material moving element that is suitable for reciprocating motion, wherein the material moving element contact consumptive material through reciprocating motion is in order to drive the consumptive material through frictional force and move forward in the transfer passage to the consumptive material is heated and is melted in order to be used for the drawing of this 3D works.

Description

Reciprocating type material moving mechanism applied to handheld 3D drawing device

Technical Field

The utility model relates to a 3D draws the device, especially relates to a reciprocating type that is applied to handheld 3D and draws device moves material mechanism.

Background

Handheld 3D draws device, like 3D printing pen, 3D drawing pen, it is controlled by the staff, just can create on any object surface through traditional painting brush operation, directly draw in the air even, need not use computer or relevant software, and the operation is very convenient, and it has all had extensive application in fields such as architectural decoration material, artistic creation, amusement and teaching.

At present, typical 3D print pen includes pen main part, control module, feed mechanism and heating mechanism, and during operation, the passageway of this pen main part is penetrated to bar-shaped consumptive material, and this feed mechanism of this control module control drives this consumptive material and gets into this heating mechanism forward and extrude from the nozzle of this pen main part after being heated and melted, and the hot melt material forms the picture that 3D was drawn after the cooling.

In order to ensure that the hot melt material is continuously extruded from the nozzle of the pen body for drawing 3D works, it is necessary to continuously convey the consumable material to the heating mechanism, however, the conventional feeding mechanism generally employs gears or threads to engage the consumable material and drives the consumable material to move forward through a complex rotational gear set or a thread driving device. How to design a consumable material which is simple in structure and can continuously and reliably convey the consumable material to be melted forward is a key factor of whether the handheld 3D drawing device can smoothly discharge the consumable material to complete 3D drawing. When the conventional 3D printing pen is loaded with the consumable, due to the blocking of the gear or the thread, the front end of the consumable can only be inserted into the position of the feeding mechanism but not directly inserted into the position of the heating mechanism, so that an additional conveying step is required to move the front end of the consumable to the position of the heating mechanism; when unloading this consumptive material, also need earlier the front end of this consumptive material to leave this feed mechanism's position from the position material returned of this heating mechanism, could take out this consumptive material from this passageway of this pen main part to the operation is complicated, and it is long consuming time.

Disclosure of Invention

An advantage of the utility model is that a handheld 3D draws device and reciprocating type material mechanism that moves thereof is provided, wherein reciprocating type material mechanism that moves forward through a mode drive consumptive material of reciprocating motion to accomplish the lasting feeding of this consumptive material.

Another advantage of the present invention is to provide a handheld 3D drawing device and reciprocating type material moving mechanism thereof, wherein this consumptive material can be along with reciprocating type material moving mechanism's at least one moves the material component and is moved forward and driven and move forward synchronously to accomplish the transport forward to this consumptive material.

Another advantage of the present invention is to provide a handheld 3D drawing device and reciprocating type material moving mechanism thereof, wherein in every material moving period, the distance that the material moving element moved forward decides the distance that this consumptive material moved forward, thereby the distance and the moving speed that move forward in every period of material moving element can be used to control the feed rate of this consumptive material.

Another advantage of the utility model is that a handheld 3D draws device and reciprocating type material mechanism that moves thereof is provided, wherein reciprocating type material mechanism that moves passes through move this consumptive material of frictional force drive that produces between material component and this consumptive material and move forward to it constructs to make its frictional force that moves forward the consumptive material be greater than its frictional force to the consumptive material when reseing, thereby guarantees that the consumptive material can be carried forward continuously.

Another advantage of the present invention is to provide a handheld 3D drawing device and reciprocating type material moving mechanism thereof, wherein since the material moving element is configured to be suitable for keeping elastically in contact with the consumable material, the consumable material is allowed to move forward along the conveying channel until the front end thereof is pushed away in the material loading preparation operation, the material moving element is allowed to cross the reciprocating type material moving mechanism to reach a hot melting mechanism of the handheld 3D drawing device, so that unlike the conventional gear or screw driving mechanism, additional conveying operation is required to convey the front end of the consumable material from the gear or screw driving mechanism to the heating position.

Another advantage of the present invention is to provide a handheld 3D drawing device and reciprocating type material moving mechanism thereof, wherein the material moving element contacts with the consumable under the effect of elastic force, thereby allowing the diameter of the consumable to have a relatively large tolerance, unlike the diameter tolerance requirement of the consumable in a conventional 3D printing pen, which is strict.

Another advantage of the utility model is that a handheld 3D draws device and reciprocating type material mechanism that moves thereof is provided, wherein move thereby material component and this consumptive material can be separated convenient follow this consumptive material is taken out to a transfer passage of handheld 3D drawing device to make things convenient for the replacement of this consumptive material.

Another advantage of the utility model is that a handheld 3D draws device and reciprocating type material mechanism that moves thereof is provided, wherein handheld 3D draws the device and can conveniently return the material through mechanical structure, thereby reciprocating type driving motor who moves the material mechanism's electrode polarity need not set up to changeable polarity to need the reversal motor to provide the reversal operation and take out the consumptive material unlike traditional gear or screw thread actuating mechanism.

Another advantage of the utility model is that a handheld 3D draws device and reciprocating type material mechanism that moves thereof is provided, wherein handheld 3D draws the front end that the device can allow this consumptive material to directly withdraw from the heating position conveying channel to conveniently take out this consumptive material, and need not wait for this consumptive material to move back to breaking away from gear or screw thread actuating mechanism after completely from the heating position unlike traditional 3D print pen and can extract this consumptive material.

Another advantage of the utility model is that a handheld 3D draws device and reciprocating type material mechanism that moves thereof is provided, wherein it is less with this consumptive material area of contact to move the material component, thereby when handheld 3D draws the device and disposes a dyeing mechanism and can provide the dyeing of multiple colour, it is less relatively to be infected with the dyestuff on the component to move to disturb the influence when changeing the dyestuff dyeing to this consumptive material and be less relatively.

Another advantage of the utility model is that a handheld 3D draws device and reciprocating type material mechanism that moves thereof is provided, wherein handheld 3D draws device still is provided with a non return subassembly reciprocating type material mechanism that moves material component in-process that resets backward, the non return subassembly can act on this consumptive material and prevent that the consumptive material from returning to can guarantee that this consumptive material produces a predetermined displacement forward in moving the material cycle.

Another advantage of the utility model is that a handheld 3D draws device and reciprocating type material mechanism that moves thereof is provided, wherein handheld 3D draws device simple structure, convenient operation.

Therefore, the utility model provides a reciprocating type material mechanism that moves that is applied to handheld 3D and draws device, it is applicable to being in a solid consumptive material carry forward in a transfer passage of handheld 3D drawing device so that it reachs the heating position and be melted in order to be used for drawing 3D works, it moves the material component including being suitable for reciprocating motion, wherein through reciprocating motion move this consumptive material of material component contact with this consumptive material of drive and be in move forward in the transfer passage to this consumptive material is heated and is melted in order to be used for the drawing of this 3D works.

In some embodiments, the reciprocating material moving mechanism comprises an advancing driving device and a backward driving device, wherein in one material moving period, the advancing driving device is used for driving the material moving element to move forward, and the backward driving device is used for driving the material moving element to reset backward.

In some embodiments, the reciprocating material moving mechanism comprises a power source and a driving assembly, wherein the driving assembly periodically drives the material moving element to move back and forth under the action of energy provided by the power source.

In some embodiments, the power source comprises a battery module, a driving motor and an output shaft, and the driving assembly comprises a reciprocating control element and a driving element, wherein the driving motor rotates under the effect of the power supplied by the battery module, and the reciprocating control element is connected to the output shaft and is suitable for synchronously rotating with the rotating driving motor and driving the driving element to move back and forth, so that the driving element drives the material moving element to move back and forth.

In some embodiments, the reciprocating control element comprises a movement control wheel, which has a curved first driving action surface, and the driving element has a first force bearing surface, so that when the movement control wheel rotates, the rotating first driving action surface acts on the corresponding first force bearing surface to drive the driving element to move forward, thereby driving the material moving element to move forward.

In some embodiments, the movement control wheel has a second driving action surface with a curved surface, the first driving action surface and the second driving action surface are located on opposite sides of the movement control wheel, and the driving element has a second force-bearing surface, so that when the movement control wheel rotates, the rotating second driving action surface acts on the corresponding second force-bearing surface to drive the driving element to move backward, thereby driving the material moving element to move backward.

In some embodiments, the drive element comprises a drive carriage having an engagement slot, the first force-bearing surface and the second force-bearing surface being located on opposite sides of the engagement slot, the positions on the respective surfaces of the first and second actuation-surfaces being driven to periodically rotate into the engagement slot to respectively interact with the first and second force-bearing surfaces.

In some embodiments, the first and second driving action surfaces each have at least one peak position, at least one valley position, and at least two gradual surfaces extending between adjacent ones of the peak and valley positions, wherein the peak and valley positions of the first driving action surface and the valley and peak positions of the second driving action surface are on opposite sides corresponding to the movement control wheel.

In some embodiments, the material moving element is arranged obliquely with respect to the transport channel and has a driving contact surface adapted to contact the consumable to drive it forward by friction.

In some embodiments, the driving element has a fixing groove, the material moving element is a blade which is installed on the fixing groove and is obliquely arranged relative to the conveying channel, and the material moving element has a driving contact surface which is suitable for contacting with the consumable to drive the consumable to move forwards through friction force.

In some embodiments, the material moving element is a flat plate and is integrally formed with the driving rack, and the material moving element is obliquely arranged relative to the conveying channel, and the material moving element has a driving contact surface which is suitable for contacting with the consumable to drive the consumable to move forwards through friction force.

In some embodiments, the reciprocating material moving mechanism further comprises an elastic limiting element which is pressed against the material moving element so that the material moving element is suitable for keeping contact with the consumable material.

In some embodiments, the reciprocating material moving mechanism further includes an elastic limiting element integrally formed with the driving rack and abutting against the material moving element, so that the material moving element is suitable for keeping in contact with the consumable material.

In some embodiments, the reciprocating material moving mechanism further comprises a check mechanism adapted to act on the consumable to prevent the consumable from moving backwards in the conveying channel.

In some embodiments, the non-return mechanism comprises a non-return element and a carrier located within the device body, the non-return element being mounted to or integrally formed with the carrier and comprising a non-return contact surface adapted to contact the consumable to frictionally prevent rearward movement of the consumable within the delivery channel.

In some embodiments, the carrier has an assembly slot, and the check element is a blade mounted to the assembly slot and disposed obliquely to the transfer passage.

In some embodiments, the non-return mechanism has a curved channel to prevent rearward movement of the consumable within the delivery channel.

In some embodiments, the handheld 3D rendering device further includes a material returning mechanism including a material returning switch and a material returning driving component, the material returning switch drives the material returning driving component to move when operated, and the material returning driving component includes a pushing element adapted to act on the material moving element to separate the material moving element from the consumable material, so that the consumable material is adapted to be taken out from the conveying channel.

In some embodiments, the handheld 3D drawing device further comprises a material returning mechanism including a material returning switch and a material returning driving assembly, wherein when the material returning switch is operated, the material returning driving assembly drives the material returning driving assembly to move, and the material returning driving assembly includes a pushing element which is suitable for acting on the material moving element and the check element to separate the material moving element and the check element from the consumable material, so that the consumable material is suitable for being taken out from the conveying channel.

In some embodiments, the handheld 3D rendering device further includes a housing, the reciprocating moving mechanism is assembled to the housing, the housing has a limit groove, and the driving element is adapted to slide in the limit groove.

In some embodiments, the handheld 3D rendering device further includes a housing, the reciprocating moving mechanism is assembled to the housing, the housing has a limiting hole, and the driving element includes a driving limiting end portion passing through the limiting hole and adapted to move back and forth in the limiting hole.

In some embodiments, the handheld 3D mapping device includes a conveying pipe, which forms the conveying channel, and the conveying pipe includes a first partial pipe and a second partial pipe, where the first partial pipe and the second partial pipe are spaced apart to form a material moving space, and the material moving element is adapted to act on a portion of the consumable located in the material moving space to drive the consumable to move forward.

Drawings

Fig. 1 is a schematic perspective view of a handheld 3D rendering device according to a preferred embodiment of the present invention.

Fig. 2 is an exploded schematic view of the handheld 3D rendering device according to the above preferred embodiment of the present invention.

Fig. 3 is a further exploded schematic view of the hand-held 3D rendering device according to the above preferred embodiment of the present invention to illustrate its reciprocating material moving mechanism.

Fig. 4 is a schematic cross-sectional view of the handheld 3D mapping device according to the above preferred embodiment of the present invention.

Fig. 5 is a schematic perspective view illustrating the reciprocating material moving mechanism of the handheld 3D drawing device according to the above preferred embodiment of the present invention.

Fig. 6 is a partially enlarged schematic view at a in fig. 5.

Fig. 7A is a partially enlarged schematic view at B in fig. 5.

Fig. 7B and 7C are schematic structural diagrams illustrating a modified embodiment of a material moving element of the reciprocating material moving mechanism of the handheld 3D drawing device according to the above preferred embodiment of the present invention.

Fig. 8A and 8B are enlarged schematic perspective views from different perspectives of a reciprocating control element of the reciprocating material moving mechanism of the handheld 3D drawing device according to the above preferred embodiment of the present invention.

Fig. 9 is a schematic structural diagram of an initial state of the handheld 3D rendering device in operation according to the above preferred embodiment of the present invention.

Fig. 10 is a schematic structural diagram of the reciprocating material moving mechanism of the handheld 3D drawing device according to the above preferred embodiment of the present invention when the material moving element moves forward to push the consumable material.

Fig. 11 is a schematic structural diagram of the reciprocating material moving mechanism of the handheld 3D drawing device according to the above preferred embodiment of the present invention when the material moving element moves backward to return to the initial state.

Fig. 12A and 12B are schematic sectional views illustrating a material returning mechanism of the handheld 3D mapping device according to the above preferred embodiment of the present invention during a material returning process.

Fig. 13A and 13B are schematic perspective views of the material returning mechanism of the handheld 3D drawing device according to the above preferred embodiment of the present invention during a material returning process.

Fig. 14 is a schematic perspective view of the handheld 3D rendering device according to the first variant of the above preferred embodiment of the present invention.

Fig. 15 is an exploded schematic view of the handheld 3D rendering device according to the first variant implementation of the above preferred embodiment of the present invention.

Fig. 16 is a schematic cross-sectional view of the hand-held 3D rendering device according to the above preferred embodiment of the present invention.

Fig. 17 and 18 are respectively exploded schematic views of the reciprocating material moving mechanism of the handheld 3D drawing device according to the first modified embodiment of the present invention.

Fig. 19A and 19B are schematic perspective views from different perspectives of a reciprocating control element of the reciprocating material moving mechanism of the handheld 3D drawing device according to the first modified embodiment of the present invention.

Fig. 20, 21, 22 and 23 are schematic structural views illustrating a process in which the material moving element of the reciprocating material moving mechanism of the handheld 3D drawing device moves forward to push the consumable material according to the first modified embodiment of the above preferred embodiment of the present invention.

Fig. 24 to 25 are schematic structural views illustrating a process of backward resetting of the material moving element of the reciprocating material moving mechanism of the handheld 3D drawing device according to the first modified embodiment of the present invention.

Fig. 26, 27 and 28 are schematic cross-sectional views illustrating a material returning process of the handheld 3D mapping device according to the first variant embodiment of the present invention.

Fig. 29 to 30 are schematic perspective views illustrating a material returning process of the handheld 3D drawing device according to the first modified embodiment of the preferred embodiment of the present invention.

Fig. 31 is a schematic structural diagram of the handheld 3D rendering device according to the second variant implementation of the above preferred embodiment of the present invention.

Fig. 32 is a schematic structural diagram of the handheld 3D rendering device according to a third variant implementation of the above preferred embodiment of the present invention.

Fig. 33 is a schematic structural diagram of a handheld 3D rendering device according to a fourth variant implementation of the above preferred embodiment of the present invention.

Fig. 34 is a schematic structural diagram of a handheld 3D rendering device according to a fifth modified implementation of the above preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Fig. 1 to 13B show a hand-held 3D drawing device according to a preferred embodiment of the present invention, which can heat and melt a rod-shaped or strip-shaped consumable 1 in a solid state to form a hot-melt material for use in drawing 3D works, and specifically includes a device body 10, a reciprocating material moving mechanism 20, a hot-melt mechanism 30, and a controller 40. The device body 10 has a transport path 11 for transporting the consumable 1 and includes a hand-held housing 12 for manual manipulation to draw in a three-dimensional space. Typically, the hand-held housing 12 is configured to be pen-shaped in appearance for being held by human fingers for operation. The reciprocating material moving mechanism 20 forwards conveys the consumable 1 in the conveying channel 11 of the handheld shell 10 to the hot melting mechanism 30 under the control of the controller 40, and the hot melting mechanism 30 heats the consumable 1 to form the hot melting material under the control of the controller 40 and further extrudes the hot melting material from the front end of the device main body 10 for drawing the 3D work.

The consumable 1 is a solid hot melt material, such as PLA (polylactic acid) material or ABS (acrylonitrile butadiene styrene) material, and is ejected from the front end of the device body 10 after being heated and melted by the hot melt mechanism 30, and the 3D product is formed after cooling.

The delivery channel 11 may be formed by the hand held housing 12, i.e. the space inside the hand held housing 12 forms the delivery channel 11. In this embodiment of the present invention, the device body 10 includes a transfer duct 13 for forming the transfer passage 11, i.e., the transfer passage 11 is formed by a separate duct.

More specifically, the conveying pipeline 13 is disposed in the handheld housing 12 and includes a first partial pipeline 131 on the front side and a second partial pipeline 132 on the rear side, wherein the first partial pipeline 131 and the second partial pipeline 132 are disposed at an interval to form a material moving space 133 between the first partial pipeline 131 and the second partial pipeline 132, so that the consumable 1 is exposed in the material moving space 133 for the reciprocating material moving mechanism 20 to act on the consumable 1 to drive the consumable 1 to be conveyed forward in the conveying pipeline 13.

The shape and dimensions of the transport channel 11 formed by the transport duct 13 are adapted to the shape and dimensions of the consumable 1, so as to ensure a smooth forward movement of the consumable 1 in the transport channel 11. For example, in this preferred embodiment of the invention, the transport channel 11 and the consumable 1 are both circular in cross-section.

In traditional 3D drawing pen, this consumptive material 1 is through gear or screw thread interlock and by pivoted gear or screw thread forward drive removal, and in the utility model discloses, this consumptive material 1 is in reciprocating type moves under the effect of material mechanism 20 and is in forward carry in the device main part 10 extremely hot melt mechanism 30.

More specifically, the reciprocating material moving mechanism 20 includes a power source 21, a driving assembly 22 and a material moving member 23, the material moving member 23 is in contact with the surface of the consumable 1 in the working state, and the consumable 1 is driven to move back and forth by the power source 21 and the driving assembly 22, so that the consumable 1 is driven to move forward in the conveying channel 11 of the device body 10 by the friction force generated between the material moving member 23 and the consumable 1.

That is, the material moving member 23 can act on the surface of the consumable part 1 and periodically reciprocate, and in one material moving period, when the material moving member 23 moves forward, the consumable part 1 moves forward synchronously with the forward movement of the material moving member 23, and when the material moving member 23 moves backward and is reset, the material moving member 23 does not drive the consumable part 1 forward.

The transfer element 23 does not drive the consumable 1 forward by rotation, but drives the consumable 1 by linear movement. It is understood that the structure of the material moving member 23 for performing the reciprocating movement to drive the consumable part 1 to move forward is not limited to the structure shown in the drawings of the present invention. For example, in the material transferring period, the material transferring component 23 can hold the consumable 1 and move forward a predetermined distance, then release the consumable 1 and retreat to reset. The material moving element 23 can generate a deformation, and can generate a reciprocating displacement and drive the consumable part 1 to move forwards in a deformation period.

In the preferred embodiment of the present invention, the power source 21 includes a driving motor 211, an output shaft 212 and a power module 213, the power module 213 may include a rechargeable battery to provide power for the driving motor 211, or the power module 213 may be adapted to be connected to an external power source to convert the provided power of the external power source into power that can be used by the handheld 3D rendering device, thereby driving the driving motor 211. The output shaft 212 is driven by the driving motor 211 to rotate.

The driving assembly 22 includes a reciprocating control element 221 and a driving element 222, wherein the reciprocating control element 221 is connected to the output shaft 212 to rotate under the driving action of the output shaft 212. The driving element 222 is coupled to the reciprocating control element 221 to generate a reciprocating movement under the action of the reciprocating control element 221, such that the material moving element 23 reciprocates synchronously with the reciprocating movement of the driving element 222, thereby driving the consumable 1 to move forward.

The reciprocating control element 221 and the driving element 222 transform the rotation output by the output shaft 212 into the linear reciprocating movement of the driving element 222, so that the reciprocating movement of the material moving element 23 can be realized, and the forward movement of the material moving element 23 is used for driving the synchronous forward displacement of the consumable material 1.

In the preferred embodiment of the present invention, the material moving element 23 is in a blade shape or a flat plate shape, a contact end 231 of the distal end of the material moving element 23 includes a driving contact surface 230, and a proximal end connection end 232 thereof is connected to the driving element 222, which is adapted to contact with the consumable 1, so that the consumable 1 is driven to move forward by the forward movement of the driving contact surface 230 contacting with the consumable 1 and generating a forward friction force during the material moving period. In the return movement of the driving interface 230 to the rear, the consumable 1 can be maintained in a position displaced a distance forward.

As shown in FIG. 7A, the driving interface 230 may have a V-shaped mouth for increasing the contact area with the consumable 1. It is also possible to implement it as a single-sided edge or as a double-sided edge, respectively, as shown in fig. 7B and 7C.

In the handheld 3D drawing device, the contact end 231 of the material moving element 23 extends from the driving contact surface 230 contacting with the consumable 1 toward the direction opposite to the advancing direction of the consumable 1, and forms an acute angle α with the consumable 1. That is, the contact end 231 of the material moving element 23 is obliquely arranged so that a friction force can be generated between the driving contact surface 230 and the surface of the consumable 1 for driving the forward movement of the consumable 1. It is worth mentioning that by designing the size of the included angle α, the friction force generated between the driving contact surface 230 and the surface of the consumable 1 can be adjusted.

The reciprocation control member 221 includes a connection part 2211 and a movement control wheel 2212, the connection part 2211 is mounted to the output shaft 212 of the power source 21, and the movement control wheel 2212 is provided on a surface of the connection part 2211 to be adapted to be driven by the driving motor 211 to rotate synchronously with the rotation of the output shaft 212. The movement control wheel 2212 may be integrally formed with the connection member 2211, or the movement control wheel 2212 may be mounted to the connection member 2211.

The movement control wheel 2212 comprises on its front side, i.e. the side discharging towards the front end of the hand-held 3D rendering device, a first driving action surface 22121 extending in the circumferential direction for driving the driving element 222 to move forward, so that during the transfer period, the transfer element 23 can be driven by the driving element 222 to produce a forward displacement of the consumable 1. Then, the material moving element 23 is returned to the initial reset position by a reset structure to complete one material moving period.

Referring to fig. 9 to 11, in the preferred embodiment of the present invention, the movement control wheel 2212 is a reciprocating direction control wheel, i.e. it can be used to control the forward and backward reciprocating movement of the transferring member 23 and the movement control wheel 2212 is also used as the returning structure for returning the driving member 222 and the transferring member 23. More specifically, the movement control wheel 2212 includes a second driving action surface 22122 extending in the circumferential direction on the rear side opposite to the front side. The first driving action surface 22121 and the second driving action surface 22122 are both curved surfaces for contacting the driving element 222 and driving the reciprocating movement of the driving element 222.

The driving element 222 includes a driving frame 2221, and the material moving element 23 is disposed on the driving frame 2221. The driving frame 2221 includes a first force-receiving surface 22211 at a position corresponding to the first driving force-receiving surface 22121, and a second force-receiving surface 22212 at a position corresponding to the second driving force-receiving surface 22212, an engagement groove 22213 is provided between the first force-receiving surface 22211 and the second force-receiving surface 22212, a portion of the movement control wheel 2212 extends into the engagement groove 22213, so that the first driving force-receiving surface 22121 and the second driving force-receiving surface 22122 each have a partially curved surface extending into the engagement groove 22213, and the first driving force-receiving surface 22121 and the second driving force-receiving surface 22122 each rotate and pass through the engagement groove 22222213 periodically at respective positions on the circumference thereof when the movement control wheel 2212 rotates, for driving the reciprocating movement of the driving frame 2221.

The first driving action surface 22121 includes at least one first peak position 22121a, at least one first valley position 22121b, and at least two first gradient surfaces 22121c extending between the first peak position 22121a and the first valley position 22121b along the circumferential direction, the first gradient surfaces 22121c are inclined surfaces or arc surfaces. When the first peak position 22121a of the first driving acting surface 22121 is in contact with the first force-bearing surface 22211, the driving holder 2221 is located at the position of the maximum value of the forward displacement. When the first valley position 22121b of the first driving acting surface 22121 is in contact with the first force-bearing surface 22211, the driving frame 2221 is located at a reset position.

In the stage of driving the consumable 1 forward in one of the material moving cycles, the first valley position 22121b of the first driving action surface 22121 is located in the engaging slot 22213 and is in contact with the first force-bearing surface 22211 first, and one of the first gradually-changing surfaces 22121c of the first driving action surface 22121 gradually rotates into the engaging slot 22213 and is in contact with the first force-bearing surface 22211 until the first peak position 22121a of the first driving action surface 22121 enters the engaging slot 22213 and is in contact with the first force-bearing surface 22211, the movement control wheel 2212 drives the driving element 222 to move so as to further drive the material moving element 23 to reach the maximum displacement in the forward direction.

In a reset phase of the material transferring period, the driving element 222 is reset, the position of the first driving action surface 22121 contacting the first force-bearing surface 22211 gradually changes from the first peak position 22121a to the first valley position 22121b along a first gradual surface 22121c, and the material transferring element 23 returns to its initial position as the driving element 222 moves backward.

The second driving action surface 22122 includes at least one second peak position 22122a, at least one second valley position 22122b, and at least two second gradient surfaces 22122c extending between the second peak position 22122a and the second valley position 22122b along the circumferential direction, the second gradient surfaces 22122c being inclined or arc surfaces. When the second valley point position 22122b of the second driving action surface 22122 is in contact with the second force-bearing surface 22212, the driving holder 2221 is located at the position of the maximum value of forward displacement. When the second peak position 22122a of the second driving action surface 22122 is in contact with the second force-bearing surface 22212, the driving frame 2221 is located at a reset position.

In the stage of driving the consumable 1 forward in one of the transfer cycles, the driving element 222 is moved forward by the first driving action surface 22121, and the position where the second driving action surface 22122 contacts the second force-bearing surface 22212 is gradually changed from the second peak position 22122a to the second valley position 22122b along one of the second gradual change surfaces 22122 c.

In a reset phase of the material moving period, the second valley position 22122b of the second driving action surface 22122 is located in the engaging slot 22213 and is firstly in contact with the second force-bearing surface 22212, and one second gradually-changing surface 22122c of the second driving action surface 22122 gradually rotates into the engaging slot 22213 and is in contact with the second force-bearing surface 22212 until the second peak position 22122a of the second driving action surface 22122 is in contact with the second force-bearing surface 22212, the movement control wheel 2212 drives the driving element 222 to move backward so as to further drive the material moving element 23 to return to the initial position thereof as the driving element 222 moves backward.

That is, in this preferred embodiment of the present invention, the first driving acting surface 22121 and the second driving acting surface 22122 on the opposite sides of the movement control wheel 2212 act on the first force-bearing surface 22211 and the second force-bearing surface 22212 respectively to drive the driving element 222 to move forward and backward respectively, so that the moving element 23 is further driven to move by the driving element 222 to realize the reciprocating displacement of the moving element 23.

The first peak position 22121a of the first driving action surface 22121 and the second peak position 22122b of the second driving action surface 22122 are respectively located on corresponding opposite sides of the movement control wheel 2212, and the first peak position 22121b of the first driving action surface 22121 and the second peak position 22122a of the second driving action surface 22122 are respectively located on corresponding opposite sides of the movement control wheel 2212.

When the position of the first driving action surface 22121 rotating into the engaging groove 22213 is gradually changed from the first valley position 22121b to the first peak position 22121a, the position of the second driving action surface 22121 rotating into the engaging groove 22213 is gradually changed from the second peak position 22122a to the second valley position 22122b, and the rotation of the first driving action surface 22121 drives the forward displacement of the driving element 222 to realize the forward displacement of the material moving element 23, so that the material moving element 23 drives the consumable 1 to move forward for a preset distance.

When the position of the first driving action surface 22121 rotating into the engagement slot 22213 gradually changes from the first peak position 22121a to the first valley position 22121b, the position of the second driving action surface 22121 rotating into the engagement slot 22213 gradually changes from the second valley position 22122b to the second peak position 22122a, and the rotation of the second driving action surface 22121 drives the backward displacement of the driving element 222 to realize the backward displacement of the material moving element 23, so that the material moving element 23 returns to the reset position thereof.

In this preferred embodiment of the present invention, the driving member 222 forms a fixing groove 2222 inside the driving holder 2221, which extends obliquely, for fixing the transferring member 23 obliquely. The driving rack 2221 has a front limiting surface 22214 at the front of the transferring member 23 on the inner side thereof, a rear limiting surface 22215 at the rear of the transferring member 23, the fixing groove 2222 is formed between the front limiting surface 22214 and the rear limiting surface 22215, and the rear limiting surface 22215 obliquely supports the transferring member 23. It will be appreciated that the transfer member 23 is illustrated in this embodiment as a blade and is mounted to the drive member 222. In other embodiments, it may also be implemented as a flat plate integrally formed with the drive element 222.

It will be understood that the distance that the transfer member 23 moves forward in each transfer cycle determines the distance that the consumable substance 1 is displaced forward, so that the distance that the transfer member 23 moves forward in each cycle and the moving speed can be used to control the feeding speed of the consumable substance 1. The distance between the first peak position 22121a and the first valley position 22121b of the first driving action surface 22121 determines the distance of forward displacement of the transfer element 23, and the rotation speed of the driving motor 211 determines the rotation speed of the movement control wheel 2212, and thus the movement speed of the driving element 222, to further determine the movement speed of the transfer element 23. Accordingly, the feeding speed of the consumable 1 is controlled by controlling the distance between the first peak position 22121a and the first valley position 22121b of the first driving action surface 22121 and the rotation speed of the driving motor 211.

The driving element 222 further forms a mounting groove 2223 inside the driving frame 2221, and the driving element 222 further includes an elastic position-limiting element 2224 connected to the driving frame 2221 and mounted in the mounting groove 2223. One end of the elastic limiting element 2224 is connected to the driving rack 2221, and the other end of the elastic limiting element 2224 is pressed against the material moving element 23, so that the material moving element 23 is kept in an inclined state and, during operation, the driving contact surface 230 of the contact end 231 of the material moving element 23 keeps contacting with the consumable 1, so as to drive the consumable 1 to move forward through friction.

The elastic position-limiting element 2224 may be made of a material with elastic restoring property, such as a spring, a torsion spring, an elastic metal, an elastic rubber, etc. In this embodiment shown in fig. 1-13B, the resilient stop element 2224 is a spring. It is understood that in other modified embodiments, the elastic limit element 2224 may be formed integrally with the driving rack 2221, that is, the driving rack 2221 itself has elasticity, and a part of the elastic limit element 2224 is formed.

It should be mentioned that the manner of holding the material moving element 23 in pressing contact with the consumable 1 by the elastic stop element 2224 allows the diameter of the consumable to have a relatively large tolerance. I.e. the transfer element 23 can act on consumables 1 of different tolerance diameters. And when traditional 3D drawing pen passed through gear or screw thread interlock and this consumptive material 1 of drive, can only insert this consumptive material 1 of definite size in gear or the screw thread, this consumptive material 1 of traditional 3D drawing pen is comparatively strict to the diameter tolerance requirement.

In addition, the reciprocating type material moving mechanism 20 in this embodiment of the present invention drives the consumable 1 to move forward through the friction force generated between the material moving element 23 and the consumable 11, and the driving contact surface 230 of the contact end 231 is pressed against the consumable 1, so that the friction force of the consumable 1 moving forward is greater than the friction force of the consumable 1 when the consumable 1 is reset, thereby ensuring that the consumable 1 can be continuously conveyed forward.

In this embodiment, the reciprocating material moving mechanism 20 further comprises a check assembly 24 for preventing backward movement of the consumable 1. More specifically, check assembly 24 includes a check 241 and a carrier 242, check 241 may be the same structure as transfer element 23 and includes a check interface 2410 that contacts the surface of consumable 1 to prevent retraction of consumable 1.

Similarly, an assembly groove 2421 is formed inside the carrier 242, and extends obliquely for obliquely fixing the check 241, and the check 241 forms an acute angle β with the conveying passage 11. The carrier 242 has a front side defining surface 2422 inside in front of the check element 241, a rear side defining surface 2423 behind the check element 241, the assembly groove 2421 is formed between the front side defining surface 2422 and the rear side defining surface 2423, and the rear side defining surface 2423 supports the check element 241 obliquely. Similarly, it will be appreciated that the check 241 is illustrated in this embodiment as a blade and is mounted to the carrier 242. In other embodiments, it may also be implemented as a flat plate integrally formed with the carrier 242.

The carrier 242 also has a fitting groove 2424 formed inside, and the check assembly 24 further includes an elastic defining element 243 coupled to the carrier 242 and installed in the fitting groove 2424. One end of the elastic limiting element 243 is connected to the carrier 242, and the other end is pressed against the check element 241, so that the check element 241 is kept in an inclined state and in operation, the check contact surface 2410 of the check element 241 is kept in contact with the consumable 1, so as to prevent the consumable 1 from moving backwards through friction force.

Similarly, the elastic limiting element 243 may be made of a material having a resilient property, such as may be embodied as a spring, a torsion spring, an elastic metal, an elastic rubber, or the like. In this embodiment shown in fig. 1 to 13B, the elastic defining element 243 is a spring. It will be appreciated that in other variant embodiments, the elastic limiting element 243 may also be formed integrally with the loading ledge 242, i.e. the loading ledge 242 itself has an elasticity, a part of which forms the elastic positioning element 243.

It can be understood that, during the forward movement in one of the material moving cycles, the driving element 222 of the reciprocating material moving mechanism 20 drives the material moving element 23 to generate a forward driving friction force with the surface of the consumable material 1, which is greater than the check friction force generated by the check element 241 of the check assembly 24 with the surface of the consumable material 1, so as to ensure that the consumable material 1 can drive the consumable material 1 to move forward synchronously when the material moving element 23 moves forward.

The hand-held housing 12 includes a two-part housing 121 assembled to form the hand-held housing 12 and defining an interior cavity 122 therein for receiving the delivery conduit 13, the reciprocating material moving mechanism 20, the heat-staking mechanism 30 and the controller 40.

The device body 10 further comprises a containing housing 14, and the containing housing 14 is mounted to the handheld housing 12 for mounting the reciprocating material moving mechanism 20. Wherein the drive element 222 is movable relative to the containment case 14, the carrier 242 of the check assembly 24 is fixedly mounted to the containment case 14. In this embodiment, the accommodating case 14 includes a two-part case 141 assembled with each other to form the accommodating case 14 and to form an accommodating chamber 142. The material transfer space 133 and the material transfer member 23 are located in the accommodating cavity 142 of the accommodating shell 14.

The accommodating case 14 may be provided with a guide structure for guiding the movement of the driving member 222, so as to guide and limit the movement of the driving member 222, for example, the accommodating case 14 and the driving member 222 may be provided with corresponding matching guide rails and guide grooves for guiding the movement of the driving member 222. Alternatively, the check assembly 24 may be provided with a guide structure that guides the movement of the drive element 222, thereby facilitating guiding and limiting the movement of the drive element 222, e.g., the check assembly 24 and the drive element 222 may guide the movement of the drive element 222 through corresponding matching guide rails and guide grooves.

In this embodiment of the present invention, the receiving housing 14 is formed with a limiting hole 143 at the front end, the driving element 222 includes a front driving limiting end 2225 and a rear driving limiting end 2226 respectively extending to opposite sides of the driving frame 2221, and the check assembly 24 includes a front check limiting end 244 and a rear check limiting end 245 respectively extending to the supporting frame 242.

The front drive limit end 2225 of the drive element 222 and the front check limit end 244 of the check assembly 24 cooperate to form a front engagement tube 25 for engaging a rear end 1312 of the first section of tubing 131 of the delivery tubing 13, e.g., in this embodiment, the front engagement tube 25 fits over the outer surface of the rear end 1312 of the first section of tubing 131 of the delivery tubing 13. It will be appreciated that the front coupling tube 25 may also be fitted over the inner surface of the rear end 1312 of the first partial pipe 131 of the conveying pipe 13.

The rear drive limit end 2226 of the drive element 222 and the rear check limit end 245 of the check assembly 24 cooperate to form a rear engagement tube 26 for engaging a front end 1321 of the second partial conduit 132 of the delivery conduit 13, e.g., in this embodiment, the rear engagement tube 26 fits over the outer surface of the front end 1321 of the second partial conduit 132 of the delivery conduit 13. It will be appreciated that the rear engaging tube 26 may also be fitted over the inner surface of the front end 1321 of the second partial pipe 132 of the conveying pipe 13.

In this embodiment of the present invention, the front-side engaging pipe 25 passes through the limiting hole 143 of the front end of the accommodating case 14, so that the limiting hole 143 limits the movement of the front-side driving limiting end 2225 of the driving member 222 to prevent unnecessary swing thereof. More specifically, the driving element 222 moves back and forth under the rotation of the movement control wheel 2212, and the front driving limit end 2225 of the driving element 222 passes through the limit hole 143 and slides along the surface of the front check limit end 244 of the check assembly 24.

It can be understood that the length of the front driving limiting end 2225 of the driving element 222 is L1, and the length between the first peak position 22121a and the first valley position 22121b of the first driving action surface 22121 is L2, then L1 is greater than L2, so that when the driving element 222 drives the material moving element 23 to slide, the sliding distance does not cause the front driving limiting end 2225 of the driving element 222 to be disengaged from the limiting hole 143 of the accommodating shell 14.

The device body 10 further comprises a head end housing 15 for accommodating the heat fusing mechanism 30, the heat fusing mechanism 30 comprises a heating element 31, a heating pipe 32 and a connecting pipe 33, wherein the connecting pipe 33 connects a front end 1311 of the first partial pipe 131 of the conveying pipe 13 to the heating pipe 32, and a rear end 1322 of the second partial pipe 132 of the conveying pipe 13 to the hand-held housing 12, so that the consumable 1 is moved from the conveying pipe 13 into the heating pipe 32 by the material moving element 23 to be heated and melted, and is extruded from a nozzle 321 at the front end of the heating pipe 32.

In this illustrative embodiment of the present invention, the heating element 31 is electrically connected to the controller 40 and heats the consumable 1 by electrical heating. It is understood that the heating element 31 may be a heating resistance wire, a heating film, a Metal Ceramic Heater (MCH), a PTC heater, or the like. The heat-melting mechanism 30 may further include a temperature detector 34 disposed at the heating element 31 for detecting a temperature thereof, thereby facilitating control of the heating operation of the heating element 31 by the controller 40.

The controller 40 includes a control circuit board 41 and a start switch 42, the start switch 42 is disposed on the hand-held casing 12 of the device main body 10, and the start switch 42 is electrically connected to the control circuit board 41 for starting the reciprocating material moving mechanism 20 to make the material moving element 23 drive the consumable 1 to move forward and start the heating element 31 to heat the consumable 1.

It is worth mentioning that the material moving element 23 and the consumable 1 can be separated from each other so as to be convenient to follow the conveying channel 13 of the handheld 3D drawing device takes out the consumable 1 which is not used, and facilitates the replacement of the consumable 1. More specifically, as shown in fig. 12A to 13B, the handheld 3D drawing device further includes a material returning mechanism 50, which includes a material returning driving component 51 disposed on the reciprocating material moving mechanism 20 and a material returning switch 52 disposed on the handheld housing 12 of the device body 10, wherein when a user operates the material returning switch 52, the material returning driving component 51 separates the material moving component 23 from the consumable 1, so that the consumable 1 that is not used is conveniently taken out of the conveying channel 11 of the device body 10 by the user.

The material return drive assembly 51 of the material return mechanism 50 can act on the drive element 222 or directly on the material moving element 23. In this embodiment, the material return drive assembly 51 is designed to act directly on the transfer element 23 and the non-return element 241. More specifically, the material returning driving assembly 51 includes a pushing element 511 and a resetting element 512, the pushing element 511 is connected to the material returning switch 52, and the resetting element 512 is used for resetting the pushing element 511.

A movable gap 22216 is formed between the material shifting element 23 and the front limiting surface 22214 of the driving rack 2221 of the driving element 222, a movable gap 2425 is formed between the check element 241 and the front limiting surface 2422 of the carrier 242, so that when the pushing element 511 is driven by the material returning switch 52 to act on the rear surfaces of the material shifting element 23 and the check element 241, the material shifting element 23 and the check element 241 are driven to rotate and separate from the consumable 1, respectively, the

movable gaps

22216 and 2425 provide movable spaces for the material shifting element 23 and the check element 241, respectively, and the elastic limiting element 2224 and the elastic limiting element 243 are implemented as compression springs, respectively, and are compressed in the process.

When the material returning switch 52 is released, the reset element 512 automatically drives the pushing element 511 to return to its initial position, and the elastic limit element 2224 and the elastic limit element 243 are reset under the action of their own elastic restoring force, so as to reset the material moving element 23 and the check element 241, respectively, to keep them at the position where they can contact with the consumable 1. The return element 512 may be a spring or torsion spring, among other components.

Therefore, the handheld 3D drawing device can enable the front end of the consumable 1 to be drawn out of the hot melting mechanism and directly taken out of the conveying channel 11 by providing a mechanical structure of the material returning mechanism 50, thereby facilitating material returning, so that the polarity of the electrode of the driving motor 211 of the reciprocating material moving mechanism 20 is not set to be variable polarity, thereby not requiring a reversing motor to provide a reversing operation to take out the consumable 1 unlike a conventional gear or screw driving mechanism.

In addition, in this embodiment of the present invention, since the material moving element is in contact with the consumable under the action of the elastic force, in the material loading preparation operation of the consumable 1, the handheld 3D drawing device allows the consumable 1 to move forward along the conveying channel 11 until the front end of the consumable pushes away the material moving element 23 to reach the heating pipe 32 of the hot melting mechanism 30 of the handheld 3D drawing device, so that unlike the conventional gear or screw driving mechanism, an additional conveying operation is required to convey the front end of the consumable 1 from the gear or screw driving mechanism to the heating position.

And, in the utility model discloses in move material component 23 drive contact surface 230 is less with this consumptive material area of contact, thereby when handheld 3D drawing device disposes a dyeing mechanism and can provide the dyeing of multiple colour, it is relatively less to be infected with the dyestuff on the material component 23 to move, thereby interference influence when changing the dyestuff dyeing to this consumptive material 1 is relatively less.

It can be understood that, when the handheld 3D rendering device of this embodiment of the present invention is used, the consumable 1 is directly inserted into the heating tube 32 of the heat fusing mechanism 30 along the conveying channel 11 of the device main body 10 to reach the front end thereof. Then when the user presses the start switch 42, the power source 21 and the driving assembly 22 of the reciprocating material moving mechanism 20 enter a working state, the driving motor 211 in the power source 21 rotates, the movement control wheel 2212 of the reciprocating control element 221 is driven to rotate along with the rotation of the driving motor 211 so as to drive the driving element 222 to move back and forth, so that the driving element 222 drives the material moving element 23 to move back and forth, so as to realize that the consumable 1 continuously moves forward to the hot melting mechanism 30 to be heated and melted and is discharged from the nozzle 321.

Fig. 14 to 30 show the handheld 3D mapping device according to the first variant of the above preferred embodiment of the present invention, which specifically includes a device body 10, a reciprocating material moving mechanism 20, a heat melting mechanism 30 and a controller 40. The device body 10 has a transport path 11 for transporting the consumable 1 and includes a hand-held housing 12 for manual manipulation to draw in a three-dimensional space. The reciprocating material moving mechanism 20 forwards conveys the consumable 1 in the conveying channel 11 of the handheld shell 10 to the hot melting mechanism 30 under the control of the controller 40, and the hot melting mechanism 30 heats the consumable 1 to form the hot melting material under the control of the controller 40 and further extrudes the hot melting material from the front end of the device main body 10 for drawing the 3D work.

More specifically, the conveying pipeline 13 comprises a first partial pipeline 131 at the front side and a second partial pipeline 132 at the rear side, wherein the first partial pipeline 131 and the second partial pipeline 132 are arranged at intervals to form a material moving space 133 between the first partial pipeline 131 and the second partial pipeline 132, so that the consumable 1 is exposed in the material moving space 133 to be acted on by the reciprocating material moving mechanism 20 to drive the consumable 1 to be conveyed forward in the conveying pipeline 13.

The reciprocating material moving mechanism 20 comprises a power source 21, a driving assembly 22 and a material moving element 23, wherein the material moving element 23 is in contact with the surface of the consumable 1 in the working state, the power source 21 comprises a driving motor 211, an output shaft 212 and a power module 213, the driving assembly 22 comprises a reciprocating control element 221 and a driving element 222, and the reciprocating control element 221 is connected to the output shaft 212 to rotate under the driving action of the output shaft 212. The driving element 222 is coupled to the reciprocating control element 221 to generate a reciprocating movement under the action of the reciprocating control element 221, such that the material moving element 23 reciprocates synchronously with the reciprocating movement of the driving element 222, thereby driving the consumable 1 to move forward.

The reciprocation control member 221 includes a connection part 2211 and a movement control wheel 2212, the connection part 2211 is mounted to the output shaft 212 of the power source 21, and the movement control wheel 2212 is provided on a surface of the connection part 2211 to be adapted to be driven by the driving motor 211 to rotate synchronously with the rotation of the output shaft 212.

The movement control wheel 2212 includes a first driving action surface 22121 and a second driving action surface 22122 extending in the circumferential direction at the front side and the rear side thereof, respectively, the driving element 222 includes a driving frame 2221, and the transferring element 23 is disposed at the driving frame 2221. The driving frame 2221 includes a first force-receiving surface 22211 at a position corresponding to the first driving force-receiving surface 22121, and a second force-receiving surface 22212 at a position corresponding to the second driving force-receiving surface 22212, an engagement groove 22213 is provided between the first force-receiving surface 22211 and the second force-receiving surface 22212, a portion of the movement control wheel 2212 extends into the engagement groove 22213, so that the first driving force-receiving surface 22121 and the second driving force-receiving surface 22122 each have a partially curved surface extending into the engagement groove 22213, and the first driving force-receiving surface 22121 and the second driving force-receiving surface 22122 each rotate and pass through the engagement groove 22222213 periodically at respective positions on the circumference thereof when the movement control wheel 2212 rotates, for driving the reciprocating movement of the driving frame 2221.

In the above preferred embodiment of the present invention, the movement control wheel 2212 is located at the rear side of the material moving element 23, and in this embodiment, the movement control wheel 2212 is arranged side by side with the material moving element 23. Thereby reducing the size of the reciprocating material moving mechanism 20.

Accordingly, the first driving action surface 22121 includes at least one first peak position 22121a, at least one first valley position 22121b, and at least two first gradient surfaces 22121c extending between the first peak position 22121a and the first valley position 22121b in the circumferential direction, the first gradient surfaces 22121c being inclined or arc surfaces. The second driving action surface 22122 comprises at least one second peak position 22122a, at least one second valley position 22122b and at least two second gradient surfaces 22122c extending between the second peak position 22122a and the second valley position 22122b along the circumferential direction, wherein the second gradient surfaces 22122c are inclined surfaces or arc surfaces.

As shown in fig. 20 to 23, in the stage of driving the consumable part 1 forward in one feeding cycle, the movement control wheel 2212 rotates to make the driving element 222 acted by the first driving acting surface 22121, and the contact position of the first force-bearing surface 22211 and the first driving acting surface 22121 changes from the first valley position 22121b to the first peak position 22121a along the first gradually-changing surface 22121c, so that the driving element 222 moves forward and moves forward in parallel and synchronously with the feeding element 23 arranged on the movement control wheel 2212.

As shown in fig. 24 to 25, in a reset phase of the material moving period, the position where the second driving action surface 22122 contacts the second force-bearing surface 22212 is gradually changed from the second valley position 22122b to the second peak position 22122a along the second gradually-changing surface 22122c, so that the moving control wheel 2212 drives the driving element 222 to move backward to further drive the material moving element 23 to return to the initial position thereof as the driving element 222 moves backward.

In this preferred embodiment of the present invention, the driving member 222 forms a fixing groove 2222 extending obliquely inside the driving holder 2221 for fixing the transfer member 23 obliquely. The driving element 222 further comprises an elastic limiting element 2224, which is integrally formed with the driving frame 2221. That is, the driving rack 2221 has elasticity itself, and a part of it forms the elastic limiting element 2224, and one bottom end of the elastic limiting element 2224 is pressed against the material moving element 23. In the above embodiment, the rear end of the elastic stop element 2224 is made as a spring and presses against the material moving element 23.

Similarly, an assembly groove 2421 extending obliquely for obliquely fixing the check member 241 is formed inside the carrier 242. The check assembly 24 further includes an elastic limiting element 243, the elastic limiting element 243 is integrally formed with the carrier 242, that is, the carrier 242 has elasticity itself, and a part of the elastic limiting element 243 forms the elastic limiting element 243, and the bottom end of the elastic limiting element 243 is pressed against the check element 241, so that the check element 241 is kept in an inclined state, and in operation, the check contact surface 2410 of the check element 241 is kept in contact with the consumable 1, so that the consumable 1 is prevented from moving backwards through friction force.

The hand-held housing 12 includes a two-part housing 121 assembled to form the hand-held housing 12, and an inner cavity 122 formed therein for accommodating the delivery tube 13, the reciprocating material moving mechanism 20, the heat-melting mechanism 30 and the controller 40.

The device body 10 further comprises a containing housing 14, and the containing housing 14 is mounted to the handheld housing 12 for mounting the reciprocating material moving mechanism 20. Wherein the drive element 222 is movable relative to the containment case 14, the carrier 242 of the check assembly 24 is fixedly mounted to the containment case 14. The accommodating case 14 includes a two-part case 141 assembled with each other to form the accommodating case 14 and to form an accommodating chamber 142. The material transfer space 133 and the material transfer member 23 are located in the accommodating cavity 142 of the accommodating shell 14. Wherein the accommodating case 14 further has a limiting groove 144, wherein the forward and backward displacement of the driving element 222 is limited in the limiting groove 144, i.e. the limiting groove 144 of the accommodating case 14 functions to guide the moving path of the driving element 222.

As shown in fig. 26 to 30, the handheld 3D drawing device further includes a material returning mechanism 50 including a material returning driving assembly 51 disposed on the reciprocating material moving mechanism 20 and a material returning switch 52 disposed on the handheld housing 12 of the device body 10, wherein the material returning driving assembly 51 includes a pushing element 511 and a connecting element 513, and the pushing element 511 is operatively connected to the material returning switch 52 through the connecting element 513.

When the material returning switch 52 is slid, the pushing element 511 is driven by the material returning switch 52 to act on the rear side surfaces of the material moving element 23 and the check element 241, the material moving element 23 and the check element 241 are driven to rotate and separate from the consumable 1, and the elastic limiting element 2224 and the elastic limiting element 243 are elastically deformed. As shown in fig. 28 and 30, when the material-moving element 23 and the non-return element 241 are separated from the consumable 1, the consumable 1 can be removed from the hand-held housing 12 along the transport channel 11. When the material return switch 52 is slid to its initial position, the elastic restoring force of the elastic limiting element 2224 and the elastic limiting element 243 is used to reset the material moving element 23 and the check element 241, respectively.

Fig. 31 shows the hand-held 3D rendering device according to the second variant of the above preferred embodiment of the present invention, in this embodiment, the difference from the above embodiment is that in the above embodiment, the driving element 222 and the check assembly 24 are arranged side by side and on opposite sides of the conveying pipe 13, while in this embodiment, the driving element 222 and the check assembly 24 may be arranged back and forth along the conveying pipe 13 and on the same side of the conveying pipe 13.

The material shifting element 23 and the check element 241 are located on the same side of the conveying pipe 13 and are arranged in tandem, for example, the driving element 222 and the material shifting element 23 are located on the rear side of the check assembly 24, the driving element 222 and the check assembly 24 are respectively sleeved with the conveying pipe 13, and a movable distance is reserved between the check assembly 24 and the driving element 222 for the back and forth reciprocating movement of the driving element 222.

Fig. 32 shows the hand-held 3D rendering device according to a third variant of the above preferred embodiment of the invention, in this embodiment the hand-held 3D rendering device comprises a non-return assembly 24 without the above mentioned non-return element 241 implemented as a blade. The check assembly 24 may prevent the consumable 1 from being displaced backward in other ways, for example, in the embodiment shown in fig. 32, the check assembly 24 has a curved channel 246, so that during the backward returning of the material moving member 23, the inner surface of the curved channel 246 can generate friction force to the consumable 1, thereby preventing the consumable 1 from being displaced backward.

As shown in fig. 33, the handheld 3D rendering device according to the fourth variant of the above preferred embodiment of the present invention, in this embodiment, the material moving element 23 is a flat plate and is integrally formed with the driving frame 2221. The check member 241 has a flat plate shape and is integrally formed with the carrier 242.

Fig. 34 shows the hand-held 3D drawing device according to the fifth variant of the above preferred embodiment of the present invention, in this embodiment, the reciprocating material moving mechanism 20 comprises an advancing driving device 201 and a retreating driving device 202, wherein the advancing driving device 201 comprises the power source 21 and the driving assembly 22 in the above embodiment, wherein only one side of the movement control wheel 2212 of the driving assembly 22 has the first driving acting surface 22121, the other side does not have the second driving acting surface 22122, the driving frame 2221 has only the first force receiving surface 22211, and does not have the second force receiving surface 22212, the movement control wheel 2212 drives the driving frame 2221 to move forward when rotating, and the driving frame 2221 drives the material moving element 21 to move forward.

The rearward driving means 202 may be implemented as a return elastic member such as a return spring, one end of which is connected to the driving rack 2221 and the other end of which is connected to the housing case 14 or the case of the driving motor 211. When the material moving element 23 is driven to move forward by the forward movement driving device 201 in a material moving period, the return spring is deformed, and after the material moving element reaches the maximum position of forward movement, the elastic restoring force of the return spring drives the driving rack 2221 to move backward, so that backward return of the material moving element 23 is realized.

Correspondingly, the utility model provides a handheld 3D draws device's ejection of compact method, it includes that the material loading prepares step, consumptive material and carries step and melt ejection of compact step. Wherein in the feed preparation step, the consumable 1 is inserted into the transport path 11 of the device body 10 until the front end of the consumable 1 reaches a heating tube 32. In the consumable conveying step, the consumable 1 is driven to move forward by the material moving element 23 of the reciprocating material moving mechanism 20. In the heat-melting step, the consumable 1 driven to move forward is heat-melted in the heat-melting mechanism 30 and discharged from the nozzle 321.

In the feeding preparation step, the front end of the consumable part 1 enters from the first partial delivery pipe, passes through the material transfer space 133 between the first partial delivery pipe 131 and the second partial delivery pipe in the reciprocating material transfer mechanism 20, and reaches the heating pipe 32 via the first partial delivery pipe 132. So that there is no need to transport the consumable 1 from the position of the driving structure to the heating position as in the conventional 3D painting pen requiring an extra step.

In the consumable conveying step, the forward displacement of the consumable 1 is driven by the transfer element 23, which can be displaced back and forth. The manner in which the displacement of the transfer element 23 back and forth is achieved can be a plurality of possible configurations. The front and back displacement can be realized by different driving components respectively, and can also be realized by the same driving component, for example, in the above preferred embodiment of the present invention, the cam structure of the rotating movement control wheel 2212 is used to drive the driving rack 2221 of the driving element 222 to move back and forth, so as to drive the material moving element 23 to move back and forth.

In addition, the present invention may further include a material returning step, when the material returning switch 52 is moved, it can drive the pushing element 511 to push the material moving element 23 and the non-return element 241 to separate them from the consumable material 1, respectively, so that the user can take out the unused consumable material 1 from the heating position through the conveying channel 11.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. The reciprocating type material moving mechanism is applied to a handheld 3D drawing device and is suitable for conveying a solid consumable forward in a conveying channel of the handheld 3D drawing device to enable the consumable to reach a heating position and be melted for drawing a 3D work, and the reciprocating type material moving mechanism is characterized by comprising a material moving element suitable for reciprocating movement, wherein the material moving element which reciprocates is contacted with the consumable to drive the consumable to move forward in the conveying channel, so that the consumable is heated and melted for drawing the 3D work.

2. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to claim 1, wherein the reciprocating material moving mechanism comprises a forward moving driving device and a backward moving driving device, wherein in a material moving period, the forward moving driving device is used for driving the material moving element to move forward, and the backward moving driving device is used for driving the material moving element to reset backward.

3. The reciprocating material moving mechanism applied to the handheld 3D drawing device as claimed in claim 1, wherein the reciprocating material moving mechanism comprises a power source and a driving assembly, wherein the driving assembly periodically drives the material moving element to move back and forth under the action of energy provided by the power source.

4. The reciprocating material moving mechanism applied to the handheld 3D drawing device as claimed in claim 3, wherein the power source comprises a power module, a driving motor and an output shaft, the driving assembly comprises a reciprocating control element and a driving element, wherein the driving motor rotates under the power supplied by the power module, the reciprocating control element is connected to the output shaft to be adapted to rotate synchronously with the rotating driving motor and drive the driving element to move back and forth, so that the driving element drives the material moving element to move back and forth.

5. The reciprocating material shifting mechanism applied to the handheld 3D drawing device as claimed in claim 4, wherein the reciprocating control element comprises a movement control wheel having a curved first driving action surface, and the driving element has a first force-bearing surface, so that when the movement control wheel rotates, the rotating first driving action surface acts on the corresponding first force-bearing surface to drive the driving element to move forward, thereby driving the material shifting element to move forward.

6. The reciprocating material shifting mechanism applied to the handheld 3D drawing device according to claim 5, wherein the movement control wheel has a second driving action surface with a curved surface, the first driving action surface and the second driving action surface are located on two opposite sides of the movement control wheel, and the driving element has a second force bearing surface, so that when the movement control wheel rotates, the rotating second driving action surface acts on the corresponding second force bearing surface to drive the driving element to move backward, thereby driving the material shifting element to move backward.

7. The reciprocating transfer mechanism for use with a handheld 3D drawing device of claim 6, wherein said drive element comprises a drive carriage having an engagement slot, said first force-bearing surface and said second force-bearing surface being located on opposite sides of said engagement slot, the position on the respective surfaces of said first and second actuation-surfaces being driven to periodically rotate into said engagement slot to interact with said first and second force-bearing surfaces, respectively.

8. The reciprocating transfer mechanism for use with a handheld 3D mapping device as claimed in claim 7, wherein the first and second actuation surfaces each have at least one peak location, at least one valley location, and at least two gradual surfaces extending between adjacent ones of the peak and valley locations, wherein the peak and valley locations of the first actuation surface and the valley and peak locations of the second actuation surface are located on opposite sides of the corresponding movement control wheel.

9. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to any one of claims 1 to 8, wherein the material moving element is obliquely arranged relative to the conveying channel and has a driving contact surface, and the driving contact surface is suitable for being in contact with the consumable to drive the consumable to move forwards through friction.

10. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to any one of claims 4 to 8, wherein the driving element has a fixing groove, the material moving element is a blade, the blade is mounted on the fixing groove and is obliquely arranged relative to the conveying channel, and the material moving element has a driving contact surface, the driving contact surface is suitable for contacting with the consumable to drive the consumable to move forward through friction.

11. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to any one of claims 7 to 8, wherein the material moving element is a flat plate and is integrally formed with the driving rack, and the material moving element is disposed obliquely with respect to the conveying channel, and has a driving contact surface adapted to contact with the consumable to drive the consumable to move forward by friction.

12. The reciprocating material moving mechanism applied to the handheld 3D rendering device according to claim 9, wherein the reciprocating material moving mechanism further comprises an elastic limiting element which is pressed against the material moving element, so that the material moving element is suitable for keeping in contact with the consumable material.

13. The reciprocating material moving mechanism applied to the handheld 3D rendering device according to claim 7, wherein the reciprocating material moving mechanism further comprises an elastic limiting element, which is integrally formed with the driving rack and presses against the material moving element, so that the material moving element is suitable for keeping contact with the consumable.

14. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to any one of claims 1 to 8, wherein the reciprocating material moving mechanism further comprises a check mechanism adapted to act on the consumable to prevent the consumable from moving backwards in the conveying channel.

15. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to claim 14, wherein the check mechanism comprises a check element and a carrier, the carrier is located in the device body, the check element is mounted on or integrated with the carrier, and comprises a check contact surface which is suitable for contacting with the consumable to prevent the consumable from moving backwards in the conveying channel through friction.

16. The reciprocating transfer mechanism applied to a handheld 3D drawing device according to claim 15, wherein the carrier has an assembly slot, and the check element is a blade which is mounted to the assembly slot and is disposed obliquely with respect to the transfer passage.

17. The reciprocating material-moving mechanism applied to the handheld 3D drawing device according to claim 14, wherein the check mechanism has a curved channel to prevent the consumable material from moving backwards in the conveying channel.

18. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to any one of claims 1 to 8, further comprising a material returning mechanism including a material returning switch and a material returning driving component, wherein when the material returning switch is operated, the material returning driving component is driven to move, and the material returning driving component includes a pushing element which is suitable for acting on the material moving element to separate the material moving element from the consumable material, so that the consumable material is suitable for being taken out from the conveying channel.

19. The reciprocating material moving mechanism for the handheld 3D drawing device as claimed in claim 15, further comprising a material returning mechanism comprising a material returning switch and a material returning driving assembly, wherein the material returning switch drives the material returning driving assembly to move when operated, and the material returning driving assembly comprises a pushing element adapted to act on the material moving element and the check element to separate the material moving element and the check element from the consumable material, so that the consumable material is adapted to be taken out from the conveying channel.

20. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to any one of claims 4 to 8, wherein the handheld 3D drawing device further comprises a containing shell, the reciprocating material moving mechanism is assembled on the containing shell, the containing shell is provided with a limiting groove, and the driving element is suitable for sliding in the limiting groove.

21. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to any one of claims 4 to 8, wherein the handheld 3D drawing device further comprises a containing shell, the reciprocating material moving mechanism is assembled on the containing shell, the containing shell is provided with a limiting hole, and the driving element comprises a driving limiting end part which passes through the limiting hole and is suitable for moving back and forth in the limiting hole.

22. The reciprocating material moving mechanism applied to the handheld 3D drawing device according to any one of claims 1 to 8, wherein the handheld 3D drawing device comprises a conveying pipe which forms the conveying channel, and the conveying pipe comprises a first partial pipe and a second partial pipe, wherein the first partial pipe and the second partial pipe are spaced apart from each other to form a material moving space, and the material moving element is adapted to act on a part of the consumable located in the material moving space to drive the consumable to move forward.