CN214726532U - Print head module and printer - Google Patents

Abstract

The application discloses a printing head module and a printer, wherein the printing head module comprises a printing head module, a leveling mechanism and a printing head module fixing support, the printing head module and the leveling mechanism are both arranged on the printing head module fixing support, and the printing head module can move along with the printing head module fixing support relative to a heat bed of the printer; leveling mechanism includes proximity switch, slide, base and adjustment piece, the base sets up on the print head module fixed bolster, proximity switch sets up on the slide, just the slide with base sliding connection, the adjustment piece is used for control the slide is relative the base removes, in order to adjust proximity switch with distance between the hot bed. This can achieve the object of simplifying the trimming operation of the proximity switch.

Description

Print head module and printer

Technical Field

This application belongs to and prints technical field, concretely relates to beat printer head module and printer.

Background

Currently, during the leveling process of the 3D printer, fine adjustment of the distance from the thermal bed is generally achieved by adjusting the threads of the proximity switch itself, so as to keep the distance between the nozzle and the thermal bed consistent. However, in practice, it is generally necessary to first switch the proximity switch to an adjustable state and then to rotate the threads of the proximity switch to achieve fine adjustment of the distance from the hot bed.

It can be seen that, in the related art, the adjustment of the proximity switch has a problem of complicated operation.

SUMMERY OF THE UTILITY MODEL

The application aims at providing a beat printer head module and printer, can solve in the correlation technique, proximity switch's adjustment has the problem of the operation complicacy.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a printhead module, including a printhead module, a leveling mechanism, and a printhead module fixing support, where the printhead module and the leveling mechanism are both disposed on the printhead module fixing support, and the printhead module can move along with a thermal bed of a printer relative to the printhead module fixing support;

leveling mechanism includes proximity switch, slide, base and adjustment piece, the base sets up on the print head module fixed bolster, proximity switch sets up on the slide, just the slide with base sliding connection, the adjustment piece is used for control the slide is relative the base removes, in order to adjust proximity switch with distance between the hot bed.

In a second aspect, an embodiment of the present application further provides a printer, including the print head module of the first aspect.

In the embodiment of the application, the sliding connection between the sliding seat and the base is utilized, so that the sliding seat can be controlled to slide relative to the base through the adjusting piece, and the sliding seat drives the proximity switch to move relative to the hot bed, thereby realizing the fine adjustment of the distance between the proximity switch and the hot bed, and further achieving the purpose of simplifying the fine adjustment operation of the proximity switch.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a printhead module according to an embodiment of the present disclosure;

FIG. 2 is an exploded schematic view of a leveling mechanism provided in an embodiment of the present application;

FIG. 3 is a schematic view of the adjustment member of FIG. 2;

FIG. 4 is a schematic structural diagram of a leveling mechanism provided in an embodiment of the present application;

fig. 5 is a second exploded view of a leveling mechanism provided in an embodiment of the present application;

FIG. 6 is a schematic structural view of the carriage of FIG. 5;

FIG. 7 is a second schematic structural diagram of a printhead module according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a detection point on a hotbed provided in an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application, and features in the following embodiments and embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1 to 8, the embodiment of the present application provides a printhead module 100, where the printhead module 10, a leveling mechanism 20, and a printhead module fixing bracket 30 are included in the printhead module 100, the printhead module 10 and the leveling mechanism 20 are both disposed on the printhead module fixing bracket 30, and the printhead module 10 can move relative to a thermal bed 200 of a printer along with the printhead module fixing bracket 30;

the leveling mechanism 20 comprises a proximity switch 21, a slide 22, a base 23 and an adjusting piece 24, wherein the base 23 is arranged on the print head module fixing support 30, the proximity switch 21 is arranged on the slide 22, the slide 22 is in sliding connection with the base 23, and the adjusting piece 24 is used for controlling the slide 22 to slide relative to the base 23 so as to adjust the distance between the proximity switch 21 and the heat bed 200.

In the present embodiment, the sliding connection between the sliding base 22 and the base 23 is utilized, so that the sliding base 22 can be controlled to slide relative to the base 23 through the adjusting member 24, and the sliding base 22 drives the proximity switch 21 to move relative to the hot bed 200, thereby achieving the fine adjustment of the distance between the proximity switch 21 and the hot bed 200, and further achieving the purpose of simplifying the fine adjustment operation of the proximity switch 21.

In one example, the base 23 can be removably secured to the print head module mounting bracket 30 by a bolt connection or the like, and the proximity switch 21 can be removably secured to the carriage 22 by a snap connection or the like, so that certain components of the leveling mechanism 20 can be replaced during later maintenance. Moreover, by arranging the connection between the parts of the leveling mechanism 20 as a detachable connection, the adaptation range of the leveling mechanism 20 can be increased, so that the leveling mechanism can be applied to printers with different models.

For example, a threaded hole may be formed in an end surface of the base 23, which is attached to the print head module fixing bracket 30, so as to fixedly connect the base 23 and the print head module fixing bracket 30; the base 23 may be fixedly connected to the print head module fixing bracket 30 by providing a screw hole in a side surface of the base 23.

The sliding connection between the sliding base 22 and the base 23 can realize the up-and-down movement of the proximity switch 21, and further realize the fine adjustment of the distance between the proximity switch 21 and the hot bed 200.

Moreover, the sliding connection length of the slide 22 and the base 23 determines the moving range of the proximity switch 21, that is, the moving range of the proximity switch 21 can be increased by increasing the sliding connection length of the slide 22 and the base 23, so that compared with the problem of limited movement of the existing proximity switch, the fine adjustment range of the proximity switch 21 can be effectively increased, and the leveling performance of the printer can be improved.

In addition, by adopting the leveling mechanism 20 provided by the application, not only the fine adjustment operation of the proximity switch 21 can be simplified, but also the slight deviation generated during the assembly process of the printer or after long-term use can be compensated by fine adjusting the distance between the proximity switch 21 and the hot bed 200.

Alternatively, as shown in fig. 2 and 3, the slider 22 is provided with a first mounting hole 221, the base 23 is provided with a second mounting hole 231, the adjusting member 24 includes a first connecting portion 241 fitted in the first mounting hole 221 and a second connecting portion 242 fitted in the second mounting hole 231, a cross-sectional area of the first connecting portion 241 is larger than a cross-sectional area of the second connecting portion 242, and a shaft center line of the first connecting portion 241 is spaced from a shaft center line of the second connecting portion 242;

during the rotation of the second connection portion 242, the second connection portion 242 drives the first connection portion 241 to perform an eccentric motion, and the first connection portion 241 drives the sliding seat 22 to move relative to the base 23.

In this embodiment, the adjusting element 24 may be an eccentric structure, and the second connecting portion 242 drives the first connecting portion 241 to perform an eccentric motion according to the motion principle of the eccentric structure, so as to drive the sliding base 22 to slide relative to the base 23, and finally achieve the fine adjustment of the distance between the proximity switch 21 and the thermal bed 200.

During the fine adjustment of the printhead module 10, the fine adjustment range of the proximity switch 21 is related to the eccentricity of the first connecting portion 241 and the second connecting portion 242. As shown in fig. 3, the distance between the axial center line of the first connecting portion 241 and the axial center line of the second connecting portion 242 may be set to 0.8 mm, that is, the fine tuning range of the proximity switch 21 is set to 2 × 0.8 mm, that is, 1.6 mm.

Therefore, the adjustment of the fine adjustment range of the proximity switch 21 can be realized by replacing the model of the adjusting piece 24, and the flexibility of the fine adjustment range of the proximity switch 21 is effectively improved.

Optionally, the leveling mechanism 20 further includes a first elastic member 25, the first elastic member 25 is sleeved on the second connecting portion 242, one end of the first elastic member 25 abuts against the end surface of the base 23 facing the first mounting hole 221, and the other end of the first elastic member 25 abuts against the end surface of the first connecting portion 241 facing the second mounting hole 231.

In this embodiment, by providing the first elastic member 25, the adjusting member 24 can be in a pre-pressing state, so as to prevent the adjusting member 24 from rotating randomly, and only when the external force acting on the second connecting portion 242 overcomes the abutting force of the first elastic member 25, the adjusting member 24 can be driven to perform an eccentric motion, thereby achieving a fine adjustment of the distance between the proximity switch 21 and the hot bed 200.

For example, in the process of driving the first connecting portion 241 by operating the second connecting portion 242, a downward force may be applied to the second connecting portion 242, and the downward force overcomes the abutting force of the first elastic member 25, and then a rotational force is applied to the second connecting portion 242 to drive the first connecting portion 241 to perform an eccentric motion, so as to drive the sliding seat 22 to move relative to the base 23.

In one example, the first elastic member 25 may be a spring, such as a carbon steel spring having good elastic properties.

Optionally, the second mounting hole 231 is a through hole, an operating hole 2421 adapted to an operating element (not shown) is disposed at an end of the second connecting portion 242, and the operating hole 2421 is exposed at an end surface of the base 23 facing away from the sliding seat 22;

the control member can drive the second connecting portion 242 to rotate through the operation hole, and drive the first connecting portion 241 to perform an eccentric motion.

In this embodiment, the second connecting portion 242 can be driven to rotate by the control member, so as to drive the first connecting portion 241 to perform an eccentric motion, thereby adjusting the distance between the proximity switch 21 and the thermal bed 200 by the adjusting member 24.

In one example, the operation hole 2421 may be an inner hexagonal hole, and the manipulation member may be an outer hexagonal wrench.

Optionally, as shown in fig. 4 to 6, the leveling mechanism further includes a second elastic member 27, the second elastic member 27 is located between the sliding seat 22 and the base 23, and the second elastic member 27 elastically connects the sliding seat 22 and the base 23;

the adjusting member 24 is a threaded member, the base 23 is provided with a through hole 232 adapted to the threaded member, the slide 22 is provided with a threaded hole 224 adapted to the threaded member, and the threaded member passes through the through hole 232 and is in threaded connection with the threaded hole 224;

the direction of the elastic force of the second elastic element 27 is parallel to the moving direction of the screw, and the second elastic element 27 drives the sliding base 22 to move relative to the base 23 during the process of adjusting the length of the threaded connection between the screw and the threaded hole 224.

In this embodiment, the adjusting member 24 may be a screw member such as a bolt or a screw rod, and the relative distance between the slide 22 and the base 23 may be adjusted by adjusting the length of the threaded connection between the screw member and the threaded hole 224, so as to move the slide 22 relative to the base 23, and further achieve the purpose of adjusting the distance between the proximity switch 21 and the hot bed 200.

In this example, the through hole 232 may be a through hole for facilitating the threading of the screw 24 through the base 23 and for enabling the screw to be threadedly coupled with the threaded hole 224.

The slide 22 has a first receiving slot (not shown), the base 23 has a second receiving slot (not shown), the first receiving slot and the second receiving slot are at least partially connected to form a receiving cavity, the second elastic member 27 is located in the receiving cavity, the second elastic member 27 includes a first connecting end located in the first receiving slot and a second connecting end located in the second receiving slot, the first connecting end is connected to the slide 22, and the second connecting end is connected to the base 23.

Alternatively, the second elastic member 27 may be a spring, the screw member is disposed through the receiving cavity, the screw member includes a threaded section located in the receiving cavity, and the spring is sleeved on the threaded section of the screw member located in the receiving cavity, and the stability of the movement between the slider 22 and the base 23 can be improved by the elastic force of the spring.

Optionally, the leveling mechanism 20 further includes a detent 26, the detent 26 for limiting movement between the base 23 and the carriage 22.

In the present embodiment, when lock member 26 is in the locked state, relative movement between base 23 and slider 22 cannot occur; and only in the unlocked state of locking member 26 can relative movement be produced between base 23 and carriage 22 to avoid unwanted movement between base 23 and carriage 22.

For example, during the leveling operation, the locking member 26 needs to be released to be in an unlocked state, and the adjusting member 24 is rotated to drive the sliding seat 22 to move up and down, so as to realize the up-and-down adjustment of the proximity switch 21; after adjustment to the proper position, the locking member 26 can be tightened to place it in the locked state and immobilize the position of the proximity switch 21.

In one example, the locking member 26 may be a locking bolt, the base 23 is provided with a mounting hole for the locking bolt to pass through, the sliding seat 22 is provided with a threaded mounting hole adapted to the locking bolt, and the base 23 is locked on the sliding seat 22 by bolting the locking bolt and the bolt mounting hole, so as to realize the switching between the locking state and the unlocking state between the base 23 and the sliding seat 22.

Optionally, the slide 22 includes a slide body 222 and a slide cover 223, a first buckling portion (not shown) is disposed on a side wall of the slide body 222, the slide cover 223 is disposed with a second buckling portion (not shown) adapted to the first buckling portion, the proximity switch 21 is located in a second accommodating cavity (not shown) between the slide body 222 and the slide cover 223, and the proximity switch 21 is fixed on the slide 22 by buckling of the first buckling portion and the second buckling portion;

wherein, the sliding base body 222 is connected with the base 23 in a sliding manner.

In this embodiment, the slide 22 is designed to be the slide body 222 and the slide cover 223 which are detachably connected, so that the proximity switch 21 and the slide 22 can be detachably connected, and the assembly efficiency and the post-maintenance capability of the leveling mechanism 20 are improved.

In an example, the first locking portion may be a protruding structure disposed on a side wall of the slider body 222, and the second locking portion may be a bayonet structure disposed on the slider cover 223 and adapted to the protruding structure, and the slider body 222 and the slider cover 223 are detachably connected by the engagement of the protruding structure and the bayonet structure.

Further, a sliding groove (not shown) may be provided on the sliding seat body 222, and a sliding rail (not shown) adapted to the sliding groove may be provided on the base 23, so that the sliding seat body 222 and the base 23 are slidably connected through the sliding groove and the sliding rail.

The following is a detailed description of the leveling process of the printhead module provided in this application:

during the leveling process, a proximity switch 21 with the model number M12 × 1 can be selected, and the detection distance of the proximity switch 21 is 4 mm, that is, under the normal condition, a signal can be detected under the condition that the distance between the proximity switch 21 and the heat bed 200 is 4 mm; due to the detection error, the adjustment range of the proximity switch 21 needs to meet 3.6 mm-4.4 mm, namely +/-0.4 mm; and because of the reason of equipment assembly error, the installation progress of the equipment is less than or equal to +/-0.2 mm, and the adjustment range of the proximity switch 21 needs to meet +/-0.6 mm, namely the adjustable distance of the proximity switch 21 is 1.2 mm, namely under the condition that the adjustable distance of the proximity switch 21 is 1.2 mm, the proximity switch 21 can be ensured to meet the use requirement when in any detection precision and any installation error.

To avoid the presence of other disturbing factors, the adjustable distance of the proximity switch 21 may be set to 1.6 mm. In the case that the adjusting member 24 is an eccentric button, the distance between the axial center line of the first connecting portion 241 and the axial center line of the second connecting portion 242 may be set to 0.8 mm; under the condition that the adjusting piece 24 is a threaded piece, the threaded connection length of the threaded piece and the threaded hole can be set to be 1.6 millimeters, even 2.0 millimeters, so that the proximity switch 21 can meet the use requirement when the detection precision and the installation error are random.

As shown in fig. 7 and 8, in actual operation, in order to protect the heat bed 200 from being scratched or damaged by the top of the print head module 10, an offset value f needs to be preset between the print head module 10 and the heat bed 200, and the distance between the proximity switch 21 and the heat bed 200 is set to h (h is 4 mm by default); if f is set to 0.5 mm and the proximity switch 21 is set to 4 mm from the thermal bed 200, the proximity switch 21 detects a signal and the head module 10 stops descending, and at this time, the distance between the head module 10 and the thermal bed 200 is set to 0.5 mm and the distance t between the proximity switch 21 and the head module 10 is set to 3.5 mm. During printing, the printhead module 10 needs to be moved down another 0.5 mm to return to the Z-axis origin.

The value of t can be achieved by adjusting the adjusting member 34 and the value of f, and if the value of f is 0.3 mm, the value of t is 3.7 mm. In practice, the value of t + f may be affected by the detection accuracy of the proximity switch.

Moreover, in the leveling process of the print head module 10, 16 detection points can be set, the corresponding print head module 10 is driven by the XY axis motor to reach the position right above the detection points 1-16 (the preset distance between the Z axis and the heat bed is 10 mm), the Z axis slowly descends again, when the proximity switch 21 gradually approaches the heat bed 200 and detects a signal, the height value of the Z axis corresponding to the detection point is recorded, namely, the leveling of the point position is completed, and so on, the same steps are also taken from the 2 nd to the 16 th detection points, and the detected deviation value can be recorded by a table.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A print head module is characterized by comprising a print head module, a leveling mechanism and a print head module fixing support, wherein the print head module and the leveling mechanism are arranged on the print head module fixing support, and the print head module can move along with the print head module fixing support relative to a heat bed of a printer;

leveling mechanism includes proximity switch, slide, base and adjustment piece, the base is fixed on the print head module fixed bolster, proximity switch sets up on the slide, just the slide with base sliding connection, the adjustment piece is used for control the slide is relative the base slides, in order to adjust proximity switch with distance between the hot bed.

2. The printhead module of claim 1, wherein the carriage defines a first mounting hole, the base defines a second mounting hole, the adjustment member includes a first connecting portion that fits within the first mounting hole and a second connecting portion that fits within the second mounting hole, a cross-sectional area of the first connecting portion is greater than a cross-sectional area of the second connecting portion, and a shaft centerline of the first connecting portion is spaced from a shaft centerline of the second connecting portion;

in the process of rotating the second connecting part, the second connecting part drives the first connecting part to do eccentric motion, and the sliding seat is driven to move relative to the base through the first connecting part.

3. The printhead module according to claim 2, wherein the leveling mechanism further includes a first elastic member, the first elastic member is sleeved on the second connecting portion, one end of the first elastic member abuts against an end surface of the base facing the first mounting hole, and the other end of the first elastic member abuts against an end surface of the first connecting portion facing the second mounting hole.

4. The printhead module according to claim 2, wherein the second mounting hole is a through hole, and an end of the second connecting portion is provided with an operation hole adapted to the operation member, and the operation hole is exposed to an end surface of the base facing away from the carriage;

the control piece can drive the second connecting part to rotate through the operating hole and drive the first connecting part to do eccentric motion.

5. The printhead module of claim 1, wherein the leveling mechanism further comprises a second resilient member, the second resilient member being positioned between the carriage and the base, and the second resilient member resiliently coupling the carriage and the base;

the adjusting piece is a threaded piece, a through hole matched with the threaded piece is formed in the base, a threaded hole matched with the threaded piece is formed in the sliding seat, and the threaded piece penetrates through the through hole and is in threaded connection with the threaded hole;

the elastic action direction of the second elastic piece is parallel to the moving direction of the threaded piece, and in the process of adjusting the threaded connection length of the threaded piece and the threaded hole, the second elastic piece drives the sliding seat to move relative to the base.

6. The printhead module of claim 5, wherein the carriage defines a first receiving slot, the base defines a second receiving slot, and the first receiving slot and the second receiving slot are at least partially connected to form a receiving cavity, the second resilient member is positioned in the receiving cavity, and the second resilient member includes a first connecting end positioned in the first receiving slot and a second connecting end positioned in the second receiving slot, the first connecting end is connected to the carriage, and the second connecting end is connected to the base.

7. The printhead module of any of claims 1 to 6, wherein the leveling mechanism further comprises a lock to limit relative movement between the base and the carriage.

8. The printhead module according to any one of claims 1 to 6, wherein the carriage includes a carriage body and a carriage cover plate, the carriage body is provided with a first buckling portion, the carriage cover plate is provided with a second buckling portion adapted to the first buckling portion, the proximity switch is located in a second accommodating cavity between the carriage body and the carriage cover plate, and the proximity switch is fixed on the carriage by buckling of the first buckling portion and the second buckling portion;

wherein, the slide body with base sliding connection.

9. The printhead module according to claim 8, wherein the carriage body has a sliding slot, the base has a sliding rail adapted to the sliding slot, and the carriage body and the base are slidably connected through the sliding slot and the sliding rail.

10. A printer comprising a printhead module according to any one of claims 1 to 9.

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