Broken material detection device and rapid forming equipment

Abstract

According to the material breakage detection device and the rapid prototyping equipment, the consumable material presses the pressing piece to move, the position of the pressing piece is detected to judge whether the consumable material exists or not, and detection is more accurate. According to the main technical scheme, the broken material detection device comprises a supporting body, the supporting body comprises a lead channel, and the lead channel is used for allowing consumables to penetrate through; the pressing piece is movably connected with the supporting body, and the pressing piece comprises an acting wall; the positions of the pressing piece comprise a first position and a second position, the area, extending into the lead channel, of the acting wall at the second position is different from the area, extending into the lead channel, of the acting wall at the first position in size, and the pressing piece is used for moving to the first position under the action of the consumables and returning to the second position when being separated from the consumables; and the sensing assembly is connected with the pressing piece and used for sending out a detection signal according to the position of the pressing piece. The material breaking detection device is mainly used for material breaking detection.

Description

Technical Field

[0001] The utility model relates to the field of 3D printing, in particular to a material break detection device and rapid prototyping equipment. Background Art

[0002] In rapid prototyping equipment, consumables are usually wound on a consumable roller, and the consumables are delivered to the print head by extrusion through an extruder. The molding platform and the print head are driven to move relative to each other, the print head melts the consumables, and the molten consumables are sprayed onto the molding platform through a nozzle. The material consumables will solidify layer by layer on the molding platform to achieve rapid molding of a three-dimensional model. Among them, a stable and uninterrupted supply of consumables is the basis for ensuring successful printing. In order to monitor the material shortage in real time, a material shortage detection device is usually set between the extruder and the consumable roller to send out detection information in time when the material is shortage, so as to avoid printing failure caused by undetected material shortage.

[0003] In the prior art, the material breakage detection of consumables is usually performed by rotating a rotating member following the transmission rotation of the consumables. For example, in the patent with the publication number CN113635557A, the material breakage detection device includes a rotating member for contacting the consumables and following the rotation of the consumables. The rotating member has a magnetic block, which rotates with the rotating member to periodically trigger the sensor assembly to determine whether there is consumables. Relative sliding occurs between the rotating member and the consumables, resulting in inaccurate detection. Utility Model Content

[0004] In view of this, the embodiments of the present utility model provide a material break detection device and a rapid prototyping device, which are mainly used to solve the problem of inaccurate material break detection of consumables.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] On one side, the utility model provides a material breaking detection device for rapid prototyping equipment, the material breaking detection device comprising:

[0007] A support body, the support body comprising a wire channel, the wire channel being used to pass the consumables;

[0008] A pressing member, the pressing member is movably connected to the supporting body, and the pressing member includes an action wall;

[0009] The position of the pressing member includes a first position and a second position. The area where the action wall extends into the lead-in channel in the second position is different in size from the area where the action wall extends into the lead-in channel in the first position. The pressing member is used to move to the first position under the action of the consumable, and return to the second position when separated from the consumable.

[0010] The sensing component is connected to at least the pressing member and is used to send a detection signal according to the position of the pressing member.

[0011] On the other hand, the utility model further provides a rapid prototyping device, comprising any of the above-mentioned material breakage detection devices, and a prototyping device body.

[0012] The utility model proposes a material breakage detection device and rapid prototyping equipment, which determines whether there is a consumable by pressing the pressing member to move through the consumable, and detects the position of the pressing member, so that the detection is more accurate. In the prior art, the material breakage detection of the consumable is performed by a rotating member following the transmission movement of the consumable, and relative sliding occurs between the rotating member and the consumable, resulting in inaccurate detection. Compared with the prior art, in the present application document, the pressing member can move to the first position relative to the support body under the action of the consumable, and return to the second position when the consumable is broken, and the sensing component can be used to determine whether the pressing member is in the first position or the second position, thereby determining whether there is a consumable acting on the pressing member. Compared with the in-place detection of the consumable based on the synchronous movement of the friction with the consumable, the movement of the pressing member position by squeezing the pressing member by the consumable has higher accuracy, avoiding the problem of inaccurate detection caused by slipping due to insufficient friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a material break detection device provided by an embodiment of the utility model at a first viewing angle;

[0014] Figure 2 A schematic structural diagram of a material break detection device provided by an embodiment of the utility model at a second viewing angle;

[0015] Figure 3 A schematic structural diagram of a material break detection device provided by an embodiment of the utility model at a third viewing angle;

[0016] Figure 4 An exploded schematic diagram of a material break detection device provided by an embodiment of the utility model;

[0017] Figure 5 A schematic diagram of a partial structure of a material break detection device provided by an embodiment of the utility model;

[0018] Figure 6 A perspective schematic diagram of a partial structure of a material break detection device provided by an embodiment of the utility model when the pressing member is in the second position;

[0019] Figure 7 A perspective schematic diagram of a partial structure of a material break detection device provided by an embodiment of the utility model when the pressing member is in a first position;

[0020] Figure 8 A schematic diagram of a partial structure of a pressing member provided by an embodiment of the utility model at a first viewing angle;

[0021] Fig. 9A schematic diagram of the partial structure of a pressing member provided by an embodiment of the utility model at a second viewing angle;

[0022] Fig.10 A schematic diagram of a partial structure of another pressing member provided by an embodiment of the utility model at a first viewing angle;

[0023] Fig.11 A schematic diagram of a partial structure of another pressing member provided by an embodiment of the utility model at a second viewing angle;

[0024] Fig.12 A schematic diagram of the partial structure of another pressing member provided in an embodiment of the utility model at a third viewing angle. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, the specific implementation method, structure, characteristics and effects of a cleaning component proposed according to the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0026] A wall, such as Figure 1-7 As shown, the embodiment of the utility model provides a material break detection device for rapid prototyping equipment, and the material break detection device includes:

[0027] A support body 100, the support body 100 includes a lead wire channel 130, and the lead wire channel 130 is used to pass the consumables;

[0028] A pressing member 200, the pressing member 200 is movably connected to the supporting body 100, and the pressing member 200 includes an action wall 210;

[0029] The position of the pressing member 200 includes a first position and a second position. In the second position, the area where the action wall 210 extends into the lead-in channel 130 is different in size from the area where the action wall 210 extends into the lead-in channel 130 in the first position. The pressing member 200 is used to move to the first position under the action of the consumables, and return to the second position when separated from the consumables.

[0030] The sensing component 300 is connected to at least the pressing member 200 and is used to send a detection signal according to the position of the pressing member 200 .

[0031] The material break detection device can be used alone, and the support body 100 is the shell of the material break detection device and the main support structure. The support body 100 can be an approximately square structure and a cavity structure. The support body 100 is provided with a first through-hole 110 and a second through-hole 120, and the lead-wire channel 130 passes through the first through-hole 110 and the second through-hole 120. Alternatively, the material break detection device can also be integrated into the component structure of the rapid prototyping equipment, such as the material break detection device is integrated into the inside of the print head, the support body 100 is only used to support the pressing member 200, and the lead-wire channel 130 passes through the consumable inlet of the print head, such as the throat inlet or the outlet of the extruder and the nozzle outlet of the print head, and the support body 100 can be integrally formed with the shell of the print head.

[0032] The lead wire channel 130 may be a closed structure, such as the first through-hole 110 and the second through-hole 120 are circular through-holes opened on the side wall of the support body 100, and the first through-hole 110 and the second through-hole 120 are coaxially arranged. The inner diameters of the first through-hole 110 and the second through-hole 120 may be the same, and slightly larger than the outer diameter of the consumable, such as 0.5 mm larger. The lead wire channel 130 is a channel between the first through-hole 110 and the second through-hole 120, and the lead wire channel 130 may be a closed structure enclosed by the inner wall of the support body 100 and the supporting ribs inside the support body 100. The inner diameter of the lead wire channel 130 is the same as the inner diameter of the first through-hole 110 and the second through-hole 120, so that the consumable can move smoothly in the lead wire channel 130, and the lead wire channel 130 is prevented from being too wide and causing the consumable to vibrate. Alternatively, the wire guide channel 130 may also be an open structure, that is, the area through which the consumables pass during the printing process is used as the wire guide channel 130, and the wire guide channel 130 refers to a partial area in the space through which the consumables pass.

[0033] The sensing component 300 can be connected to the support body 100 or an additional supporting structure, and is intended to be fixed relative to the support body 100, such as being connected to the inside of a print head.

[0034] In the first position and the second position, the area where the action wall 210 extends into the lead channel 130 in the second position may be larger than the area where the action wall 210 extends into the lead channel 130 in the first position. When the pressing member 200 does not contact the consumable, the pressing member 200 is in the second position. When the action wall 210 is squeezed by the consumable, the action wall 210 moves outside the lead channel 130, and the area of ​​the action wall 210 in the lead channel 130 is reduced. When the end of the consumable detaches from the action wall 210, the pressing member 200 moves to the second position, and the area of ​​the action wall 210 in the lead channel 130 is increased. Alternatively, the area where the action wall 210 extends into the guide channel 130 in the first position is larger than the area where the action wall 210 extends into the guide channel 130 in the second position. When the pressing member 200 does not contact the consumable, the pressing member 200 is in the second position. When the action wall 210 is squeezed by the consumable, the action wall 210 moves into the guide channel 130, and the area of ​​the action wall 210 in the guide channel 130 increases. When the end of the consumable separates from the action wall 210, the pressing member 200 moves to the second position, and the area of ​​the action wall 210 in the guide channel 130 decreases.

[0035] In the following embodiments, the area where the action wall 210 extends into the wire channel 130 in the second position is larger than the area where the action wall 210 extends into the wire channel 130 in the first position. The action wall 210 includes a pressing top 211, which is used to contact the consumables during the stable conveying process of the consumables, and the pressing top 211 is the highest end of the action wall 210. After the consumables are introduced into the wire channel 130, since the action wall 210 is located in the wire channel 130, the consumables will be acted on by the action wall 210, and the pressing member 200 will move in a direction away from the wire channel 130, and the portion of the action wall 210 located in the wire channel 130 will be reduced until the action wall 210 moves to the edge of the consumables, and the consumables will pass over the pressing top 211 and then move out along the wire channel 130. When the consumable is used up, the tail end of the consumable will follow the movement of the consumable into the lead channel 130. When the tail end passes through the pressing top 211, the action wall 210 loses the force of the consumable, and the tail end continues to move away from the pressing member 200. The action wall 210 will move toward the lead channel 130, and the area of ​​the action wall 210 located in the lead channel 130 will increase until the pressing member 200 moves to the second position, generating a detection signal to the main controller of the rapid prototyping equipment to indicate material breakage and realize material breakage detection.

[0036] The utility model proposes a material breakage detection device and rapid prototyping equipment, which judges whether the consumables are present by pressing the pressing member to move through the consumables, and detects the position of the pressing member, so that the detection is more accurate. In the prior art, the material breakage detection of the consumables is performed by having the rotating member follow the transmission movement of the consumables, and relative sliding will occur between the rotating member and the consumables, resulting in inaccurate detection. Compared with the prior art, in the present application document, the pressing member can move to a first position relative to the support body under the action of the consumables, and return to the second position when the consumables are broken. The sensing component can be used to determine whether the pressing member is in the first position or the second position, thereby determining whether there is a consumable acting on the pressing member. Compared with the in-place detection of the consumables based on the synchronous movement of the friction with the consumables, the movement of the pressing member position by squeezing the pressing member by the consumables has higher accuracy, avoiding the problem of inaccurate detection caused by slipping due to insufficient friction.

[0037] In one embodiment, in the second position, a portion of the active wall 210 extends into the guide wire channel 130130.

[0038] In the embodiment where the lead wire channel 130 is formed by the inner wall of the support body 100 and the supporting ribs inside the support body 100, the side wall of the lead wire channel 130 includes a clearance opening 1031, so that only a part of the pressing member 200 can pass through. Alternatively, in the embodiment where the lead wire channel 130 is an open space, the position of the action wall 210 in the second position can be restricted by the elastic member 400 described below.

[0039] By only partially extending the action wall 210 into the lead-in channel 130, no other side wall area of ​​the pressing member 200 is located in the lead-in channel 130, so that the consumables can push the pressing member to move when passing through in any direction, so that the moving direction of the consumables is not restricted, and the consumables can be retracted when the material is broken. Taking the material break detection device including the first through hole 110 and the second through hole 120 as an example, when it is used for the first time, the consumable a is led out, such as Figure 6 As shown, there is no directional restriction when the material break detection device is installed. Any one of the first opening 110 and the second opening 120 can correspond to the direction of the consumable a, and the head end of the consumable a can be inserted into any one of the first opening 110 and the second opening 120. In the following, taking the second opening 120 corresponding to the direction of the consumable as an example, the consumable a is inserted from the second opening 120 and moves along the lead channel 130. The head end will abut against the action wall 210, pushing the consumable a with force. Under the action of the consumable a and the action wall 210 in the area facing the second opening 120, the pressing member 200 will move in the direction away from the lead channel 130 until the pressing top 211 moves to the edge of the consumable a. The consumable a will pass over the pressing top 211 and then move along the lead channel 130 to be led out from the first opening 110, as shown in FIG. Figure 7As shown, the pressing member 200 will reach the first position, thus completing the initial threading process of the consumable a. When the consumable on the consumable roller is exhausted, the tail end of the consumable a will follow the movement of the consumable a into the wire guide channel 130. When the tail end passes through the pressing top 211, the pressing top 211 loses the force of the consumable a, and the tail end continues to move away from the pressing member 200. The pressing top 211 will move toward the wire guide channel 130 until the pressing member 200 moves to the second position, generating a detection signal to the main controller of the rapid prototyping device to indicate material breakage and realize material breakage detection. Then, automatic material replacement or material connection can be performed. Specifically, the consumable can be extruded in the opposite direction through the extruder, so that the consumable moves in the opposite direction and retreats from the print head. At this time, the tail end of the consumable in the lead channel 130 will move in the opposite direction toward the pressing member 200, and then abut against the area of ​​the action wall 210 toward the first through-hole 110. Under the push of the extruder and the action of the consumable and the area of ​​the action wall 210 toward the first through-hole 110, the pressing member 200 will move in the direction away from the lead channel 130 until the pressing top 211 moves to the edge of the consumable. The consumable will pass the pressing top 211, and then move along the lead channel 130 to exit from the second through-hole 120, and then the wiring operation can be performed.

[0040] The surface of the action wall 210 can be various, such as a spherical surface, a conical surface or some irregular surface, so that the areas of the action wall 210 facing both sides of the lead channel 130 can be pressed by the consumables and move to the first position. The following are some specific examples:

[0041] First, if Figure 8-9 As shown, the action wall 210 is an arc-shaped surface, such as the action wall 210 can be a hemispherical surface, and the pressing top 211 is only a point, that is, the center point of the sphere.

[0042] Secondly, the action wall 210 is a conical surface, such as a circular cone surface, a quadrangular pyramid surface, etc., and the pressing top end 211 is the tip of the circular cone surface.

[0043] Third, if Figure 10-12 As shown, the action wall 210 includes a pressing top 211, a first pressing area 212 and a second pressing area 213. The first pressing area 212 and the second pressing area 213 are both planes, and the first pressing area 212 and the second pressing area 213 are relatively inclined. The first pressing area 212 and the second pressing area 213 are close to each other in the direction close to the pressing top 211. In some embodiments, the pressing top 211 can be a surface to increase the range of the consumables to be abutted, so that the stability of the consumables transmission is better.

[0044] The distance between the first pressing area 212 and the second pressing area 213 is close to each other in the direction approaching the pressing top 211, so that when the consumable pushes the first pressing area 212 and the second pressing area 213, a force in the direction of movement of the consumable and a force moving away from the lead channel 130 are simultaneously applied to the pressing member 200, so that the pressing top 211 moves outside the lead channel 130 until the consumable can pass between the pressing top 211 and the inner wall of the lead channel 130, and then can be continuously transmitted.

[0045] The included angle between the first pressing area 212 and the second pressing area 213 is greater than or equal to 90 degrees, so that when the consumable material squeezes the first pressing area 212 and the second pressing area 213, sufficient force can be provided for the pressing member 200 to move to the first position. The included angle between the first pressing area 212 and the second pressing area 213 is less than or equal to 180 degrees, so that the consumable material can interact with the first pressing area 212 and the second pressing area 213.

[0046] In one embodiment, the moving distance of the pressing member 200 from the first position to the second position is less than or equal to the outer diameter of the consumable. On the one hand, the distance that the consumable pushes the pressing member 200 to move is reduced, reducing the difficulty of moving the consumable. On the other hand, the moving time of the pressing member 200 is reduced, increasing the sensitivity of the material break detection response.

[0047] In one embodiment, the material breakage detection device further includes an elastic member 400, which is disposed between the support body 100 and the pressing member 200, and is used to apply elastic force to the pressing member 200 to move the pressing member 200 from the first position to the second position.

[0048] After the consumable is inserted into the lead channel 130, the force of the consumable will cause the elastic member 400 to deform, and the pressing member 200 will be located in the first position under the action of the consumable. When the consumable is exhausted, after the tail end of the consumable passes through the pressing top 211, the elastic member 400 acts on the pressing member 200, so that the pressing member 200 can return to the second position under the action of the elastic force, so as to trigger the detection signal through the change of position. The elastic member 400 can be a spring. Furthermore, the elastic member 400 is connected to the end of the pressing member 200 opposite to the action wall 210, and can provide elastic force in the moving direction of the pressing member 200 through compression. In some embodiments, the end of the pressing member 200 opposite to the action wall 210 includes a connecting column 240, and the elastic member 400 is partially sleeved on the connecting column 240, so as to achieve a stable position of the spring and prevent the phenomenon of insufficient elastic force or deviation of the direction of the elastic force due to extrusion and bending.

[0049] In one embodiment, the support body 100 includes a slide groove 140 , and the pressing member 200 is movably connected to the slide groove 140 from one end opposite to the action wall 210 .

[0050] The support body 100 is slidably connected to the slide groove 140, and can slide in the slide groove 140 under the combined action of the pressure of the consumables and the elastic force of the elastic member 400. The interaction between the slide groove 140 and the pressing member 200 prevents the pressing member 200 from shaking during the movement, and plays a guiding role in the movement of the pressing member 200. More specifically, the support body 100 includes an outer shell and two first inner ribs 102, which are arranged at a relative interval and connected to the outer shell. The two first inner ribs 102 and the outer shell enclose the slide groove 140. The outer shell is the main structure of the support body 100, and the outer shell is a cavity structure. The slide groove 140 is formed by arranging the first inner ribs 102 in the outer shell of the cavity, so that the weight of the support body 100 is lighter. In addition to forming the slide groove 140, the first inner ribs 102 can also extend and connect with other inner ribs to increase the strength of the outer shell.

[0051] In one embodiment, the support body 100 includes an outer shell and a second inner rib 103, the second inner rib 103 is connected to the outer shell, the first through-hole 110 and the second through-hole 120 are opened on the outer shell, and the second inner rib 103 and the outer shell enclose a lead-in channel 130. A clearance opening 1031 is opened on the second inner rib 103, and the pressing member 200 is movably connected to the clearance opening 1031 from one side of the action wall 210.

[0052] The second inner rib 103 is an approximately semi-cylindrical rib plate, which encloses a columnar lead-in channel 130 with the arc-shaped inner wall of the shell. The first inner rib 102 can be connected with the second inner rib 103, so that the first inner rib 102 and the second inner rib 103 are more stable. The clearance opening 1031 is the entrance for the pressing member 200 to extend into the lead-in channel 130. The pressing member 200 moves in the clearance opening 1031 to achieve switching between the first position and the second position. In the second position, the spacing distance between the pressing top 211 and the inner wall of the lead-in channel 130 can be 1 mm, which is smaller than the common consumables such as 1.75 mm.

[0053] In one embodiment, in order to achieve the second position, only a portion of the active wall 210 is located in the lead channel 130, and at least a portion of the edge of the projection area of ​​the active wall 210 on the second inner rib 103 is located outside the edge of the clearance opening 1031, so that in the second position, the edge of the active wall 210 abuts against the edge of the clearance opening 1031, thereby achieving the limitation of the size of the area where the active wall 210 extends into the lead channel 130.

[0054] Furthermore, the support body 100 includes a shell, which includes an upper shell 1011 and a lower shell 1012. The upper shell 1011 is connected to the lower shell 1012, and the upper shell 1011 and the lower shell 1012 enclose an inner cavity and a lead wire channel 130. The first through-hole 110 and the second through-hole 120 are both opened in the lower shell 1012. The pressing member 200 and the sensing component 300 are both located in the inner cavity.

[0055] The housing is assembled from an upper shell 1011 and a lower shell 1012, so that the pressing member 200, the sensing component 300 and the elastic member 400 are easy to disassemble and replace. In the aforementioned embodiment including the first inner rib 102 and the second inner rib 103, the first inner rib 102 and the second inner rib 103 can be arranged in the lower shell 1012, and the upper shell 1011 only plays the role of cooperating with the lower shell 1012 to enclose the lead channel 130 and the slide groove 140. The upper shell 1011 and the lower shell 1012 can be mutually inserted and limited by studs and stud sockets, and connected by bolts.

[0056] The sensing component 300 can provide feedback of position changes in a variety of ways, such as a contact touch sensor or a non-contact distance sensor, etc. The following is an example of an implementation method of providing position feedback through electrical switching:

[0057] The sensing component 300 includes a first conductive member 310 and a second conductive member 320. The first conductive member 310 is connected to the support body 100. The first conductive member 310 is also used to be electrically connected to the controller of the rapid prototyping device. The second conductive member 320 is connected to the pressing member 200. When the second position is in the second position, the second conductive member 320 contacts the first conductive member 310 and is electrically connected. When the pressing member 200 is squeezed by the consumable material to be in the first position, the second conductive member 320 is electrically disconnected from the first conductive member 310 to generate a detection signal. Alternatively, when the second position is in the second position, the second conductive member 320 is electrically disconnected from the first conductive member 310. When the pressing member 200 is squeezed by the consumable material to be in the first position, the second conductive member 320 contacts the first conductive member 310 and is electrically connected to generate a detection signal.

[0058] In the following embodiments, the second conductive member 320 and the first conductive member 310 are electrically connected in the second position as an example for detailed description. It can be understood that the embodiments in which the second conductive member 320 and the first conductive member 310 are electrically disconnected in the second position have similar principles and are not described one by one. The second conductive member 320 and the first conductive member 310 both include a conductor portion, and both are connected to a power source for power. When consumables pass through, the pressing member 200 remains in the first position under the action of the consumables, the second conductive member 320 is separated from the first conductive member 310, the second conductive member 320 is electrically disconnected from the first conductive member 310, the circuit is not conductive, and then the first conductive member 310 does not generate current, and outputs the first electrical signal. When the material is cut off, the pressing member 200 moves toward the second position under the action of the elastic member 400, and the second conductive member 320 moves close to the first conductive member 310 until the second position, the second conductive member 320 contacts the first conductive member 310 and is electrically conductive, the circuit is conductive, and then a current is generated on the first conductive member 310, and a second electrical signal is output. Then the main controller can determine whether the material is cut off according to the difference in the electrical signal, and can issue a material cut off alarm, or directly perform automatic material changing operations under the control of the main controller, such as consumable return and welding. The main controller can also determine whether the consumable return is successful according to the difference in the electrical signal. In the second position, the second conductive member 320 is electrically connected to the first conductive member 310. A signal is generated only when the pressing member 200 returns to the second position, thereby avoiding erroneous judgment caused by slight relative movement of the second conductive member 320 and the first conductive member 310 when the consumable is uneven. Even if the consumable becomes thinner and the second conductive member 320 moves closer to the first conductive member 310, it will not reach the position of contacting the first conductive member 310 and being electrically connected, thereby achieving fault tolerance for insufficient uniformity of the consumable thickness.

[0059] In one embodiment, the pressing member 200 is provided with a movable groove 250. The first conductive member 310 and the second conductive member 320 are at least partially located in the movable groove 250. The pressing member 200 moves relative to the first conductive member 310 through the movable groove 250 to drive the second conductive member 320 to contact or disengage with the first conductive member 310. The first conductive member 310 includes a first substrate 311 and a conductive sheet 312. The first substrate 311 is connected to the support body 100. The first substrate 311 is at least partially located in the movable groove 250. The conductive sheet 312 is arranged on the first substrate 311, and the conductive sheet 312 is located in the movable groove 250. The second conductive member 320 includes a second substrate 321 and a contact pin 322. The second substrate 321 is connected to the pressing member 200. The first end of the contact pin 322 is connected to the second substrate 321. The second end of the contact pin 322 corresponds to the conductive sheet 312, so as to contact or disengage with the conductive sheet 312.

[0060] When the pressing member 200 is in the second position, the contact pin 322 abuts against the conductive sheet 312, and the contact pin 322 is electrically connected to the conductive sheet 312. When the pressing member 200 moves from the second position to the first position, the pressing member 200 moves, and the first substrate 311 moves in the movable groove 250, so that the contact pin 322 is electrically disconnected from the conductive sheet 312. The provision of the movable groove 250 makes the structure inside the housing more compact, reducing the overall volume and weight of the material break detection device.

[0061] Furthermore, the movable groove 320 passes through the pressing member 200, the first conductive member 310 passes through the movable groove 320, and the two ends of the first conductive member 310 or the first substrate 311 are respectively fixedly connected to the support body 100. This makes the position of the first conductive member 310 more stable and less prone to shaking. In some embodiments, a limit opening 150 is also provided on the support body 100, and the broken material detection device also includes a wire plug port 500, which is mechanically and electrically connected to the first conductive member 310 or one end of the first substrate 311, and the wire plug port 500 can also be electrically connected to the second conductive member 320. The wire plug port 500 is arranged in the limit opening 150 to achieve a fixed connection between one end of the first substrate 311 and the support body 100, and the wire plug port 500 is used to plug in the electrical connection line between the main controller. Furthermore, the support body 100 includes a limiting groove 160, and the other end of the first conductive member 310 is connected to the limiting groove 160 to be fixedly connected to the support body 100. In the embodiment in which the support body 100 includes the first inner rib 102, the limiting groove 160 can be formed by bending the first inner rib 102.

[0062] It is worth noting that the aforementioned implementation method of limiting the pressing member 200 by the opening 1031 is also used to prevent the contact pin 322 from exerting too much pressure on the conductive sheet 312 , thereby preventing the sensor component 300 from being damaged.

[0063] On the other hand, the utility model further provides a rapid prototyping device, comprising any of the above-mentioned material breakage detection devices, and a prototyping device body.

[0064] The main body of the molding equipment mainly includes a main support body, a print head assembly, a material rack, etc. The material rack is used to place the consumable tray. The print head assembly includes an extruder. The material break detection device can be fixed on the main support body. The consumables led out of the consumable tray are connected to the material break detection device and introduced into the extruder, so as to realize material break detection and the return of consumables after material breakage, and the consumables can be melted and continued. Alternatively, the material break detection device can also be integrated in the print head assembly, such as being located between the extruder and the nozzle. The rapid molding equipment includes the features of any of the aforementioned material break detection devices, including the advantages of any of the aforementioned material break detection devices, which will not be repeated here.

[0065] The utility model also provides the following implementation modes:

[0066] Reference numeral 1. A material breaking detection device for use in rapid prototyping equipment, the material breaking detection device comprising:

[0067] A support body 100, the support body 100 includes a lead wire channel 130, and the lead wire channel 130 is used to pass the consumables;

[0068] A pressing member 200, the pressing member 200 is movably connected to the supporting body 100, and the pressing member 200 includes an action wall 210;

[0069] The position of the pressing member 200 includes a first position and a second position. In the second position, the area where the action wall 210 extends into the lead-in channel 130 is different in size from the area where the action wall 210 extends into the lead-in channel 130 in the first position. The pressing member 200 is used to move to the first position under the action of the consumables, and return to the second position when separated from the consumables.

[0070] The sensing component 300 is connected to at least the pressing member 200 and is used to send a detection signal according to the position of the pressing member 200 .

[0071] Reference numeral 2, a material breakage detection device according to reference numeral 1, wherein:

[0072] In the second position, a portion of the active wall 210 extends into the guide wire channel 130130.

[0073] Reference numeral 3. A material breakage detection device according to reference numeral 1, wherein:

[0074] The active wall 210 is an arc-shaped surface;

[0075] Alternatively, the action wall 210 includes a pressing top 211, a first pressing area 212 and a second pressing area 213, the first pressing area 212 and the second pressing area 213 are both planes, the first pressing area 212 and the second pressing area 213 are located on both sides of the pressing top 211, and the distance between the first pressing area 212 and the second pressing area 213 includes a decreasing trend in the direction approaching the pressing top 211.

[0076] Reference numeral 4. A material breakage detection device according to reference numeral 3, wherein:

[0077] The included angle between the first pressing area 212 and the second pressing area 213 is greater than or equal to 90 degrees and less than or equal to 180 degrees.

[0078] Reference numeral 5. A material breakage detection device according to reference numeral 1, wherein:

[0079] The moving distance of the pressing member 200 from the first position to the second position is less than or equal to the outer diameter of the consumable.

[0080] Reference numeral 6. A material breakage detection device according to reference numeral 1, wherein the material breakage detection device further comprises:

[0081] An elastic member 400, the elastic member 400 is disposed between the support body 100 and the pressing member 200, and the elastic member 400 is used to apply an elastic force to the pressing member 200 to move the pressing member 200 from the first position to the second position;

[0082] The elastic member 400 is connected to one end of the pressing member 200 which is opposite to the action wall 210;

[0083] One end of the pressing member 200 opposite to the action wall 210 includes a connecting post 240 , and a portion of the elastic member 400 is sleeved on the connecting post 240 .

[0084] Reference numeral 7. A material breakage detection device according to reference numeral 1, wherein:

[0085] The support body 100 includes a slide groove 140, and the pressing member 200 is movably connected to the slide groove 140 from one end opposite to the action wall 210;

[0086] The support body 100 includes an outer shell and two first inner ribs 102 . The two first inner ribs 102 are arranged relatively spaced apart and connected to the outer shell. The two first inner ribs 102 and the outer shell enclose a slide groove 140 .

[0087] Reference numeral 8. A material breakage detection device according to reference numeral 1, wherein:

[0088] The support body 100 includes an outer shell and a second inner rib 103, the second inner rib 103 is connected to the outer shell, a first through-hole 110 and a second through-hole 120 are formed on the outer shell, the second inner rib 103 and the outer shell enclose a lead wire channel 130, and the lead wire channel 130 is connected to the first through-hole 110 and the second through-hole 120;

[0089] The second inner rib 103 is provided with a clearance opening 1031 , and the pressing member 200 is movably connected to the clearance opening 1031 from one side of the action wall 210 .

[0090] Reference numeral 9. A material breakage detection device according to reference numeral 8, wherein:

[0091] At least a portion of the edge of the projection area of ​​the action wall 210 on the second inner rib 103 is located at the outer periphery of the edge of the clearance opening 1031;

[0092] In the second position, the edge of the opening 1031 abuts against the action wall 210 .

[0093] Reference numeral 10. A material breakage detection device according to reference numeral 1, wherein:

[0094] The support body 100 includes a shell, which includes an upper shell 1011 and a lower shell 1012. The upper shell 1011 is connected to the lower shell 1012, and the upper shell 1011 and the lower shell 1012 enclose an inner cavity and a lead channel 130;

[0095] The pressing member 200 and the sensing component 300 are both located in the inner cavity.

[0096] Reference numeral 11. A material breakage detection device according to reference numeral 1, wherein:

[0097] The induction component 300 includes a first conductive member 310 and a second conductive member 320. The first conductive member 310 is connected to the support body 100 and is also used to be electrically connected to the controller of the rapid prototyping device. The second conductive member 320 is connected to the pressing member 200.

[0098] When in the second position, the second conductive member 320 contacts the first conductive member 310 and is electrically connected. When the pressing member 200 is pressed by the consumable material to be in the first position, the second conductive member 320 is electrically disconnected from the first conductive member 310 to generate a detection signal.

[0099] Alternatively, in the second position, the second conductive member 320 is electrically disconnected from the first conductive member 310 , and when the pressing member 200 is pressed by the consumable material to be in the first position, the second conductive member 320 is in contact with the first conductive member 310 and electrically connected to generate a detection signal.

[0100] Reference numeral 12. A material breakage detection device according to reference numeral 11, wherein:

[0101] The pressing member 200 is provided with a movable groove 250;

[0102] The first conductive member 310 and the second conductive member 320 are at least partially located in the movable groove 250, and the pressing member 200 moves relative to the first conductive member 310 through the movable groove 250 to drive the second conductive member 320 to contact or separate from the first conductive member 310;

[0103] The first conductive member 310 includes a first substrate 311 and a conductive sheet 312. The first substrate 311 is connected to the support body 100. The first substrate 311 is at least partially located in the active groove 250. The conductive sheet 312 is disposed on the first substrate 311 and is located in the active groove 250.

[0104] The second conductive member 320 includes a second substrate 321 and a contact pin 322 . The second substrate 321 is connected to the pressing member 200 . The first end of the contact pin 322 is connected to the second substrate 321 . The second end of the contact pin 322 corresponds to the conductive sheet 312 for contacting or separating from the conductive sheet 312 .

[0105] Reference numeral 13. A material breakage detection device according to reference numeral 12, wherein:

[0106] The movable groove 320 penetrates the pressing member 200 , the first conductive member 310 passes through the movable groove 320 , and both ends of the first conductive member 310 are fixedly connected to the support body 100 ;

[0107] A limiting opening 150 is also provided on the support body 100, and the material break detection device also includes a wire insertion port 500, which is connected to one end of the first conductive member 310, and the wire insertion port 500 is passed through the limiting opening 150. The support body 100 includes a limiting groove 160, and the other end of the first conductive member 310 is passed through the limiting groove 160 to be fixedly connected to the support body 100.

[0108] Label 14. A rapid prototyping device, comprising a material breakage detection device as described in any one of the above labels 1-13, and a prototyping device body.

[0109] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A material break detection device for rapid prototyping equipment, characterized in that: The material break detection device comprises: A support body, the support body comprising a wire channel, the wire channel being used to pass the consumables; A pressing member, the pressing member is movably connected to the supporting body, and the pressing member includes an action wall; The position of the pressing member includes a first position and a second position, the area where the action wall extends into the lead-in channel in the second position is different in size from the area where the action wall extends into the lead-in channel in the first position, and the pressing member is used to move to the first position under the action of the consumable, and return to the second position when separated from the consumable; A sensing component, wherein the sensing component is connected to at least the pressing member and is used to send a detection signal according to the position of the pressing member.

2. The material break detection device according to claim 1, characterized in that: In the second position, a partial area of ​​the active wall extends into the guide channel.

3. The material break detection device according to claim 1, characterized in that: The action wall is an arc-shaped surface; Alternatively, the active wall includes a pressing top, a first pressing area, and a second pressing area, the first pressing area and the second pressing area are both planes, the first pressing area and the second pressing area are located on both sides of the pressing top, and the distance between the first pressing area and the second pressing area includes a decreasing trend in the direction approaching the pressing top.

4. The material breakage detection device according to claim 3, characterized in that: An included angle between the first pressing area and the second pressing area is greater than or equal to 90 degrees and less than or equal to 180 degrees.

5. The material breakage detection device according to claim 1, characterized in that: A moving distance of the pressing member from the first position to the second position is less than or equal to an outer diameter of the consumable.

6. The material breakage detection device according to claim 1, characterized in that: The material break detection device also includes: an elastic member, the elastic member being disposed between the support body and the pressing member, and the elastic member being used to apply an elastic force to the pressing member so as to move the pressing member from the first position to the second position; The elastic member is connected to an end of the pressing member opposite to the action wall; The end of the pressing member opposite to the action wall comprises a connecting column, and the elastic member is partially sleeved on the connecting column.

7. The material breakage detection device according to claim 1, characterized in that: The support body comprises a slide groove, and the pressing member is movably connected to the slide groove through one end opposite to the action wall; The support body includes an outer shell and two first inner ribs, the two first inner ribs are arranged relatively spaced apart and connected to the outer shell, and the two first inner ribs and the outer shell enclose the slide groove.

8. The material breakage detection device according to claim 1, characterized in that: The support body comprises an outer shell and a second inner rib, the second inner rib is connected to the outer shell, the outer shell is provided with a first through-hole and a second through-hole, the second inner rib and the outer shell enclose the lead-wire channel, and the lead-wire channel is connected to the first through-hole and the second through-hole; The second inner rib is provided with a clearance opening, and the pressing member is movably connected to the clearance opening from one side of the action wall.

9. The material breakage detection device according to claim 8, characterized in that: At least part of the edge of the projection area of ​​the active wall on the second inner rib is located at the periphery of the edge of the clearance opening; In the second position, the edge of the clearance opening abuts against the action wall.

10. A rapid prototyping device, characterized in that: It comprises a material breakage detection device as described in any one of claims 1 to 9, and the molding equipment body.

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